Electric Ovens for Powder Coating

Electric Ovens for Powder Coating use electric infrared elements or sources. Electric infrared sources are heated by current flowing through a resistance heating element. The element and the material surrounding the element are heated to an incandescent temperature.

Companies working with sheet metal aluminum or other sorts of metal production use powder coating as the finishing. Finishing with powder coating is the best way for high quality.

As a powder-coating oven manufacturer, we design and build 2 types of powder-coating ovens.

Electric Powder Coating Ovens
Gas Fired Powder Coating Ovens

Electric powder coating ovens use resistance rods to heat the air inside the chamber on the other side gas fired powder coating ovens use burners to do the same job. Nowadays because of the increasing gas prices, electric ovens are getting more and more popular.

In electric ovens, there is a special chamber called a thermoblock. Thermoblocks are the heating sources of electric powder curing ovens. In the thermoblock, we assemble resistance rods. These rods get heated up with electric current and reach 200 C in 20 mins of time.

The rods are special heating elements that create heat when current is applied to them.

Electric ovens are a popular choice for powder coating applications due to their ease of installation, operation, and maintenance. They offer several advantages over gas-powered ovens, including:

Safety: Electric ovens do not require a gas supply, which eliminates the risk of gas leaks and explosions.
Cleanliness: Electric ovens do not produce any emissions, making them a cleaner and more environmentally friendly option.
Precision: Electric ovens provide more precise temperature control than gas ovens, which is important for ensuring consistent curing results.
Efficiency: Electric ovens are more energy-efficient than gas ovens, which can save money on operating costs.

Electric Oven Components

Electric powder coating ovens typically consist of the following components:

Heating Elements: Electric heating elements, such as nichrome ribbons or ceramic elements, provide the heat required to cure the powder.
Air Circulation System: A fan circulates hot air around the part being coated to ensure even heat distribution.
Temperature Control System: A temperature controller monitors and regulates the temperature inside the oven.
Safety Features: Safety features, such as over-temperature shut-offs and emergency stop buttons, help protect the user and the oven from damage.

Types of Electric Powder Coating Ovens

Electric powder coating ovens come in a variety of sizes and configurations to suit different needs. Some common types of electric ovens include:

Batch Ovens: Batch ovens are suitable for small to medium-sized parts and are typically loaded and unloaded manually.
Conveyor Ovens: Conveyor ovens are designed for high-volume production and continuously transport parts through the oven.
Infrared (IR) Ovens: IR ovens use infrared radiation to cure the powder, which can provide faster curing times and more energy efficiency.

Choosing an Electric Powder Coating Oven

When choosing an electric powder coating oven, several factors should be considered, including:

Size and Shape of Parts: The size of the oven should be large enough to accommodate the largest parts you plan to coat.
Production Volume: The type of oven, batch or conveyor, should be selected based on your production volume.
Desired Finish: The type of heating system, convection or IR, should be chosen based on the desired finish.
Budget: Electric powder coating ovens range in price depending on size, features, and brand.

Additional Considerations

In addition to the oven itself, several other factors should be considered when setting up an electric powder coating system, including:

Ventilation: Proper ventilation is necessary to remove fumes and dust generated during the powder coating process.
Pretreatment: The part must be properly pretreated to ensure adhesion of the powder.
Powder Application: The powder can be applied using a variety of methods, such as electrostatic spray or fluidized bed dipping.
Curing: The part must be cured at the correct temperature and time to achieve the desired finish.

Conclusion

Electric powder coating ovens offer a safe, clean, and efficient way to apply a durable finish to a wide variety of parts. By carefully considering your needs and selecting the right oven, you can achieve high-quality results that will last for years to come.

Technical properties of Electric Ovens for Powder Coating

Electric Ovens for Powder Coating

Electric ovens for powder coating use electricity to generate heat. They are typically more expensive to purchase than gas ovens, but they are also more efficient to operate. Electric ovens also produce fewer emissions than gas ovens, which makes them a better choice for environmentally sensitive applications.

Here are some of the key characteristics of electric ovens for powder coating:

Efficient operation: Electric ovens are typically more efficient than gas ovens, meaning that they use less energy to generate the same amount of heat. This can save money on operating costs over time.
Lower emissions: Electric ovens produce fewer emissions than gas ovens, making them a better choice for environmentally sensitive applications.
Precise temperature control: Electric ovens offer precise temperature control, which is important for achieving a high-quality powder coating finish.
Safety features: Electric ovens are typically equipped with a number of safety features, such as emergency stop buttons, overheating protection, and fire suppression systems.

Efficient operation

Electric powder coating ovens are generally more efficient than gas powder coating ovens. This is because electricity is a cleaner and more efficient source of energy than natural gas or propane. Electric ovens also have fewer moving parts, which reduces maintenance requirements and improves efficiency.

Here are some of the factors that contribute to the efficient operation of electric powder coating ovens:

Good insulation: Electric powder coating ovens are typically well-insulated, which helps to reduce heat loss and improve efficiency.
Efficient heating elements: Electric powder coating ovens use efficient heating elements, such as nickel-chromium or iron-chromium-aluminum alloys, which convert electricity into heat very efficiently.
Even heat distribution: Electric powder coating ovens are designed to distribute heat evenly throughout the oven chamber, which helps to ensure that all parts are cured evenly and efficiently.
Programmable controllers: Electric powder coating ovens are often equipped with programmable controllers that allow users to set the curing temperature and time precisely. This helps to ensure that the powder coating is cured efficiently and to avoid overcuring, which can waste energy and damage the parts.

In addition to these features, electric powder coating ovens can also be made more efficient by following these tips:

Use the correct oven size for the job: Do not overload the oven, as this can reduce airflow and make it more difficult to heat the oven evenly.
Load the parts properly: Make sure that the parts are loaded evenly in the oven chamber and that they are not blocking airflow.
Operate the oven at the lowest possible temperature: The curing temperature should be set to the lowest temperature that will produce the desired finish.
Use a heat recovery system: Heat recovery systems can capture and reuse exhaust heat, which can save energy and improve efficiency.

By following these tips, you can help to ensure that your electric powder coating oven is operating as efficiently as possible.

Lower Emissions

Electric powder coating ovens produce lower emissions than gas powder coating ovens. This is because electricity is a cleaner source of energy than natural gas or propane. Gas powder coating ovens produce emissions of carbon monoxide, nitrogen oxides, and volatile organic compounds (VOCs), while electric powder coating ovens produce no emissions.

The lower emissions of electric powder coating ovens make them a better choice for environmentally sensitive applications. Electric powder coating ovens also help to improve air quality and reduce the risk of respiratory problems for workers and nearby residents.

Here are some of the benefits of using electric powder coating ovens with lower emissions:

Reduced environmental impact: Electric powder coating ovens help to reduce air pollution and greenhouse gas emissions.
Improved air quality: Electric powder coating ovens help to improve air quality in the workplace and surrounding community.
Reduced risk of health problems: Electric powder coating ovens reduce the risk of respiratory problems for workers and nearby residents.
Compliance with environmental regulations: Electric powder coating ovens can help businesses to comply with environmental regulations on air emissions.

If you are considering purchasing a powder coating oven, it is important to weigh the pros and cons of electric and gas ovens. Electric ovens are more expensive to purchase, but they offer lower emissions, improved efficiency, and reduced maintenance costs. Gas ovens are less expensive to purchase, but they produce higher emissions and require more maintenance.

Ultimately, the best type of powder coating oven for you will depend on your specific needs and budget. If you are looking for an oven that is environmentally friendly and efficient, then an electric powder coating oven is a good choice.

Precise Temperature Control of an Electric Powder Coating Oven

Electric powder coating ovens use a variety of methods to achieve precise temperature control, including:

PID controllers: PID controllers are the most common type of temperature controller used in electric powder coating ovens. PID controllers continuously monitor the oven temperature and make adjustments to the heating elements to maintain the desired temperature.
Thyristor power controllers: Thyristor power controllers are another type of temperature controller that can be used in electric powder coating ovens. Thyristor power controllers use a series of solid-state switches to control the amount of power that is supplied to the heating elements. This allows for very precise temperature control.
Insulation: Good insulation is essential for precise temperature control in electric powder coating ovens. Insulation helps to reduce heat loss and maintain a consistent temperature throughout the oven chamber.
Airflow: Proper airflow is also important for precise temperature control. Airflow helps to distribute heat evenly throughout the oven chamber and prevents hot spots from developing.

Here are some tips for achieving precise temperature control in an electric powder coating oven:

Calibrate the temperature controller regularly: This will ensure that the controller is reading the oven temperature accurately.
Use a high-quality temperature probe: The temperature probe is used to measure the oven temperature and send this information to the temperature controller. A high-quality temperature probe will help to ensure accurate readings.
Inspect the insulation regularly: Make sure that the insulation is in good condition and that there are no gaps or tears.
Check the airflow regularly: Make sure that there is good airflow throughout the oven chamber.

By following these tips, you can help to ensure that your electric powder coating oven maintains precise temperature control.

Here are some additional benefits of precise temperature control in electric powder coating ovens:

Improved finish quality: Precise temperature control helps to improve the finish quality of powder coated parts.
Reduced waste: Precise temperature control helps to reduce waste by preventing parts from being overcured or undercured.
Increased efficiency: Precise temperature control helps to improve the efficiency of the powder coating process by ensuring that parts are cured at the correct temperature.
Reduced energy costs: Precise temperature control helps to reduce energy costs by preventing the oven from being overheated.

Overall, precise temperature control is an important aspect of electric powder coating ovens. By following the tips above, you can help to ensure that your oven maintains precise temperature control and delivers high-quality results.

Safety Features

Electric powder coating ovens are equipped with a variety of safety features to protect workers and equipment. Here are some of the most common safety features:

Emergency stop button: An emergency stop button allows the operator to quickly shut down the oven in the event of an accident.
Overheating protection: Overheating protection systems automatically shut down the oven if it overheats.
Fire suppression system: Fire suppression systems automatically extinguish fires in the oven chamber.
Ventilation system: Ventilation systems remove powder coating fumes and dust from the oven chamber.
Interlocking doors: Interlocking doors are doors that are interlocked with the oven controls so that the oven cannot be started while the doors are open.

In addition to these general safety features, there are also some specific safety features that should be considered when choosing an electric powder coating oven. These features include:

Ground fault circuit interrupter (GFCI) outlet: A GFCI outlet is a type of electrical outlet that protects against electrical shock.
Double-walled construction: Double-walled construction helps to keep the exterior of the oven cool, which prevents burns.
Powder coating fume filtration system: A powder coating fume filtration system removes powder coating fumes from the exhaust air.

Here are some safety tips for operating an electric powder coating oven:

Wear appropriate personal protective equipment (PPE): This includes gloves, safety glasses, a respirator, and long sleeves and pants.
Make sure the oven is properly ventilated to remove powder coating fumes and dust.
Ground the oven to prevent electrical shock.
Do not overload the oven. Overloading the oven can restrict airflow and increase the risk of fire.
Inspect the oven regularly for damage or wear and tear.
Have a fire extinguisher nearby.

By following these safety tips and choosing an electric powder coating oven with the appropriate safety features, you can help to protect workers and equipment from potential hazards.

Here are some additional benefits of using electric ovens for powder coating:

Clean operation: Electric ovens do not produce any combustion fumes, which makes them a cleaner and healthier option for operators.
Low maintenance: Electric ovens require less maintenance than gas ovens, which can save time and money.
Quiet operation: Electric ovens are typically quieter than gas ovens, which can create a more pleasant work environment.

However, electric ovens also have some disadvantages:

Higher upfront cost: Electric ovens are typically more expensive to purchase than gas ovens.
Requires a high-voltage electricity supply: Electric ovens require a high-voltage electricity supply, which may not be available in all areas.
Longer curing times: Electric ovens may have longer curing times than gas ovens, depending on the type of powder coating being used.

Overall, electric ovens are a good choice for powder coating applications where efficiency, emissions, and safety are important considerations. However, it is important to weigh the pros and cons of electric ovens before making a purchase decision.

Here are some safety tips for operating an electric powder coating oven:

Always wear appropriate personal protective equipment (PPE), such as gloves, safety glasses, and a respirator.
Make sure the oven is properly ventilated to remove powder coating fumes.
Ground the oven to prevent electrical shock.
Do not overload the oven.
Inspect the oven regularly for damage or wear and tear.
Have a fire extinguisher nearby.

By following these safety tips, you can help to ensure that your electric powder coating oven is safe and effective.

All well-designed electric ovens exhibit the following characteristics:

Vertical and horizontal zoning: To provide an effective, flexible, and efficient application of electric infrared heating to a specific process.
Precise layout and distribution of elements: To incorporate shape factors, overcome edge effects, and provide greater flexibility.
Insulated reflective panels to reradiate heat: To provide reradiation, even when panels may be dirty.
Insulated element wiring to provide additional life: To extend significantly the life of the infrared elements.
Non-contact temperature sensors for control: To provide the optimum in temperature control.
Rigid, non-vibrating structure: To lengthen the life of the elements.
Custom control: To meet the specific needs of the process and the operators.

How to Use an Electric Powder Coating Oven

How to use an electric powder coating oven

To use an electric powder coating oven, follow these steps:

Prepare the parts. This involves cleaning and degreasing the parts to ensure that the powder coating will adhere properly.
Apply the powder coating. This can be done using a variety of methods, including electrostatic spray, fluidized bed dipping, or manual dipping.
Place the parts in the electric powder coating oven. The oven is typically heated to a specific temperature, which is typically between 350 and 400 degrees Fahrenheit.
Cure the powder coating. The curing process melts the powder coating and flows it over the parts, forming a smooth, continuous film. The curing time will vary depending on the type of powder coating and the desired finish.
Remove the parts from the oven. Once the powder coating has cured, the parts are removed from the oven. The parts are now coated with a durable, long-lasting powder coating finish.

Here are some safety guidelines for using an electric powder coating oven:

Wear appropriate personal protective equipment (PPE), such as gloves, safety glasses, and a respirator.
Make sure the oven is properly ventilated to remove powder coating fumes.
Ground the oven to prevent electrical shock.
Do not overload the oven.
Inspect the oven regularly for damage or wear and tear.
Have a fire extinguisher nearby.

By following these safety guidelines, you can help to ensure that using an electric powder coating oven is safe and efficient.

Here are some additional tips for using an electric powder coating oven:

Use the correct oven size for the job.
Load the parts properly.
Operate the oven at the lowest possible temperature.
Use a heat recovery system.
Clean and maintain the oven regularly.

By following these tips, you can help to ensure that your electric powder coating oven operates efficiently and produces high-quality results.

Prepare the Parts

Degreasing is the process of removing dirt, oil, and grease from the parts. This is important to ensure that the powder coating will adhere properly. Degreasing can be done using a variety of methods, including solvent cleaning, vapor degreasing, and alkaline cleaning.

Sanding is the process of removing any rust or corrosion from the parts. It can also be used to create a rougher surface, which will help the powder coating to adhere better. Sanding can be done using a variety of tools, including hand sanders, power sanders, and blast cabinets.

Once the parts have been degreased and sanded, they are ready to be powder coated.

The Powder Coating is Applied to the Parts

There are three main methods for applying powder coating to parts:

Electrostatic spray: This is the most common method of applying powder coating. The powder is charged electrostatically and then sprayed onto the grounded part. The electrostatic charge attracts the powder to the part, resulting in a uniform coating.
Fluidized bed dipping: The parts are dipped into a fluidized bed of powder coating. The fluidized bed is a tank of powder that has been agitated to create a fluid-like state. When the part is dipped into the fluidized bed, the powder coats the part evenly.
Manual dipping: The parts are manually dipped into a vat of powder coating. This method is less common than electrostatic spray and fluidized bed dipping, but it can be used for small parts or complex shapes.

Once the powder coating has been applied, the parts are placed in a gas powder coating oven to cure the powder coating. The curing process melts the powder coating and flows it over the parts, forming a smooth, continuous film.

The choice of application method will depend on the size and shape of the parts, the type of powder coating being used, and the desired finish quality.

The Parts are Placed in the Electric Powder Coating Oven

The parts are placed in the gas powder coating oven

Once the powder coating has been applied, the parts are placed in an electric powder coating oven to cure the powder coating. The curing process melts the powder coating and flows it over the parts, forming a smooth, continuous film.

The parts are typically placed on racks or hangers and loaded into the oven. The oven door is then closed and the oven is heated to the specified curing temperature. The curing time will vary depending on the type of powder coating and the desired finish quality.

Once the curing process is complete, the oven door is opened and the parts are removed. The parts are now coated with a durable, long-lasting powder coating finish.

Here are some safety guidelines for loading and unloading parts from an electric powder coating oven:

Wear appropriate personal protective equipment (PPE), such as gloves, safety glasses, and a respirator.
Be careful not to overload the oven. Overloading the oven can restrict airflow and increase the risk of fire.
Allow the parts to cool completely before handling them.
Use caution when removing the parts from the oven, as they may be hot.

By following these safety guidelines, you can help to ensure that the process of loading and unloading parts from an electric powder coating oven is safe and efficient.

The Powder Coating Melts and Flows Over the Parts, Forming a Smooth, Continuous Film

Yes, the powder coating melts and flows over the parts, forming a smooth, continuous film. Here is an image of the powder coating melting and flowing over the parts:

The melting and flowing of the powder coating is an important part of the curing process. During the curing process, the powder coating particles melt and fuse together to form a solid film. This film is what protects the parts from corrosion and other damage.

The melting and flowing of the powder coating is also important for achieving a high-quality finish. The smooth, continuous film that is created by the melting and flowing of the powder coating gives the parts a uniform appearance and protects them from scratches and other blemishes.

Here are some factors that can affect the melting and flowing of the powder coating:

Type of powder coating: Different types of powder coatings have different melting points and flow characteristics.
Curing temperature: The curing temperature must be high enough to melt the powder coating particles, but not so high that it causes the powder coating to overheat and decompose.
Curing time: The curing time must be long enough to allow the powder coating particles to melt and fuse together completely.
Airflow: Proper airflow in the oven is important for ensuring that the powder coating particles are heated evenly and that the powder coating cures properly.

By carefully controlling the type of powder coating, curing temperature, curing time, and airflow, manufacturers can ensure that the powder coating melts and flows properly, resulting in a high-quality finish.

Once the Powder Coating has Cured, the Parts are Removed from the Oven

Once the powder coating has cured, the parts are removed from the oven. Here is an image of parts being removed from an electric powder coating oven:

The parts are typically removed from the oven using racks or hangers. It is important to allow the parts to cool completely before handling them, as they may be hot.

Here are some safety guidelines for removing parts from an electric powder coating oven:

Wear appropriate personal protective equipment (PPE), such as gloves, safety glasses, and a respirator.
Be careful not to overload the racks or hangers. Overloading the racks or hangers can cause them to collapse, which could damage the parts or injure workers.
Allow the parts to cool completely before handling them.
Use caution when removing the parts from the oven, as they may be hot.

By following these safety guidelines, you can help to ensure that the process of removing parts from an electric powder coating oven is safe and efficient.

Batch-type electric oven for powder coating

A batch-type electric oven for powder coating is a type of oven that is used to cure powder coating finishes on metal parts. It is a popular choice for powder coating applications because it is efficient, versatile, and relatively easy to use.

Batch-type electric ovens for powder coating typically consist of a large chamber that is heated by electric heating elements. The parts to be coated are placed on racks or hangers and loaded into the oven chamber. The oven door is then closed and the oven is heated to the specified curing temperature. The curing time will vary depending on the type of powder coating and the desired finish.

Once the curing process is complete, the oven door is opened and the parts are removed. The parts are now coated with a durable, long-lasting powder coating finish.

Batch-type electric ovens for powder coating offer a number of advantages over other types of powder coating ovens, including:

Efficiency: Batch-type electric ovens are very efficient at curing powder coatings. This is because the ovens are well-insulated and the heating elements are evenly distributed throughout the oven chamber.
Versatility: Batch-type electric ovens can be used to cure a wide variety of powder coatings, including epoxies, polyesters, and acrylics. They can also be used to coat a wide range of parts, from small electronic components to large automotive parts.
Ease of use: Batch-type electric ovens are relatively easy to use. The ovens typically have programmable controllers that make it easy to set the curing temperature and time.

Batch-type electric ovens for powder coating are a good choice for a variety of powder coating applications. They are efficient, versatile, and easy to use.

Here are some safety tips for operating a batch-type electric oven for powder coating:

Wear appropriate personal protective equipment (PPE), such as gloves, safety glasses, and a respirator.
Make sure the oven is properly ventilated to remove powder coating fumes.
Ground the oven to prevent electrical shock.
Do not overload the oven.
Inspect the oven regularly for damage or wear and tear.
Have a fire extinguisher nearby.

By following these safety tips, you can help to ensure that operating a batch-type electric oven for powder coating is safe and efficient.

This type of oven is largely used where there is batch production and where the volume does not justify a conveyorized installation.

Example: general engineering workshops and fabrication shops, where different types of equipment are manufactured and production volume is low.

Tunnel-type electric oven for powder coating

Automatic powder coating oven for aluminum profiles

A tunnel-type electric oven for powder coating is a type of oven that is used to cure powder coating finishes on metal parts as they are conveyed through the oven on a hanger system. It is a popular choice for high-volume powder coating applications because it is efficient, productive, and versatile.

Tunnel-type electric ovens for powder coating typically consist of a long tunnel that is heated by electric heating elements. The parts to be coated are hung on a conveyor system and loaded into the oven at one end. The conveyor system then transports the parts through the oven at a controlled speed. The curing process takes place as the parts travel through the oven. The curing time will vary depending on the type of powder coating and the desired finish.

Once the parts have reached the end of the oven, they are removed from the conveyor system. The parts are now coated with a durable, long-lasting powder coating finish.

Tunnel-type electric ovens for powder coating offer a number of advantages over other types of powder coating ovens, including:

Efficiency: Tunnel-type electric ovens are very efficient at curing powder coatings. This is because the ovens are well-insulated and the heating elements are evenly distributed throughout the oven tunnel.
Productivity: Tunnel-type electric ovens can be used to coat a high volume of parts in a short period of time. This is because the conveyor system allows for continuous loading and unloading of parts.
Versatility: Tunnel-type electric ovens can be used to cure a wide variety of powder coatings, including epoxies, polyesters, and acrylics. They can also be used to coat a wide range of parts, from small electronic components to large automotive parts.

Tunnel-type electric ovens for powder coating are a good choice for a variety of powder coating applications, especially those that require high throughput and efficiency.

Safety guidelines for operating a tunnel-type electric oven for powder coating:

Wear appropriate personal protective equipment (PPE), such as gloves, safety glasses, and a respirator.
Make sure the oven is properly ventilated to remove powder coating fumes.
Ground the oven to prevent electrical shock.
Do not overload the conveyor system. Overloading the conveyor system can restrict airflow and increase the risk of fire.
Inspect the oven and conveyor system regularly for damage or wear and tear.
Have a fire extinguisher nearby.

By following these safety guidelines, you can help to ensure that operating a tunnel-type electric oven for powder coating is safe and efficient.

Additional safety tips:

Train employees on the safe operation of the oven and conveyor system.
Develop and implement a safety plan for the powder coating process.
Conduct regular safety audits to identify and address any potential hazards.

By taking these precautions, you can help to create a safe and healthy work environment for your employees and protect your equipment from damage.

This type of oven is preferred where the production volume is fairly large and continuous. Example: Continuous production plants manufacturing sheet metal components for Tractor two-wheelers, power tillers, typewriters, fans, refrigerators, air conditioners etc.

Curing Method

The curing method for powder coating is the process of heating the powder coating to melt it and fuse it to the substrate. There are two main curing methods:

Thermal curing: This is the most common curing method and involves heating the powder coating to a temperature of 350-400 degrees Fahrenheit (175-200 degrees Celsius). This can be done in a variety of ways, including using a convection oven, infrared oven, or electron beam oven.
UV curing: This is a less common curing method and involves exposing the powder coating to ultraviolet (UV) light. This causes the powder coating to crosslink and cure. UV curing is typically faster than thermal curing, but it is also more expensive.

The curing method that is best for you will depend on the type of powder coating you are using, the substrate you are coating, and the desired finish.

Here is a table that compares the two curing methods:

Characteristic	Thermal curing	UV curing
Curing temperature	350-400 degrees Fahrenheit (175-200 degrees Celsius)	Ambient
Curing time	10-20 minutes	1-2 minutes
Cost	Less expensive	More expensive
Versatility	More versatile	Less versatile

Advantages of thermal curing:

More versatile
Less expensive
Can be used to cure a wider variety of powder coatings

Disadvantages of thermal curing:

Longer curing time
Requires higher temperatures

Advantages of UV curing:

Faster curing time
No need for high temperatures
Fewer emissions

Disadvantages of UV curing:

Less versatile
More expensive
Can only be used to cure certain types of powder coatings

If you are unsure which curing method is best for your needs, it is a good idea to consult with a powder coating specialist.

Convection heating in Electric Ovens for Powder Coating

Convection heating is carried out by heating the air surrounding the article to be the stove. This is generally done by having a heating chamber where the air is heated and the heated air is circulated inside the oven chambers by means of fans.

Normal sources used to heat the air are electricity, gas, steam, or oil. Convection ovens are suitable for both batch continuous operations depending on the workload.

A limitation of the convection-type oven is that it will usually be required to be started from 20 minutes to half an hour before stoving operations can begin.

This is because the air inside the oven will have to be heated to the required temperature and this takes time. Normally the temperature in a convection oven is thermostatically controlled so that the heat and therefore the fuel consumption is regulated depending upon the amount of work entering the oven.

As the object is heated by the circulation of air, any shape and size of the object can be dried by convection heating. This method is generally used for drying of large castings, machined components, and objects having a nonuniform weight distribution.

A tunnel-type oven for automatic powder coating

Radiation Heating

This is attained by heating the source so that the source starts emitting infrared radiation and this radiation heats up the paint film. The infrared emission can be directed towards the object to be heated by means of suitably shaped reflectors if necessary.

The absorption of the radiation takes place at the surface of the charge and infrared heating is thus essentially a surface heating process. Since infrared radiation is emitted in straight lines from the source or reflector, plain surfaces are most readily treated. In infrared paint stoving the temperature attained by the paint film depends upon the intensity of radiation on the painted surfaces, the time of exposure, and the mass of the article.

The color of the paint also plays a part in the speed with which the surface is heated. Black paints tend to absorb more heat, whereas glossy white paint requires a longer time of exposure. For infra-red heating, infra-red gas burners working of LPG gas, infra-red bulbs or infra-red electrical heaters can be used.

Conditioning Functions of Electric Ovens for Powder Coating

The heating of the oven with an electric heating system is achieved by recirculating oven air through Incoloy sheathed tubular heaters. The heaters are mounted in the conditioning plenum and are isolated from the workspace to prevent direct heat radiation.
Air circulation is generated by either one or two propeller-type fans, which are driven by externally mounted motors. The Model MPC35.21 employs one fan, while the Model MPC45.96 employs two. Airflow is in a compound horizontal pattern through the oven workspace.
A two-inch diameter exhaust port is provided at the top of the oven to vent moisture or undesirable vapors given off by your heating process. An exhaust kit for connection to an exhaust stack is optional.

Temperature Controller

The temperature controller of an electric powder coating oven is a device that regulates the temperature of the oven chamber. It is a critical component of the powder coating process, as the curing temperature must be precisely controlled to ensure the desired finish.

There are two main types of temperature controllers used in electric powder coating ovens:

Proportional-integral-derivative (PID) controllers: PID controllers are the most common type of temperature controller used in electric powder coating ovens. They continuously monitor the oven temperature and make adjustments to the heating elements to maintain the desired temperature.
Thyristor power controllers: Thyristor power controllers are another type of temperature controller that can be used in electric powder coating ovens. They use a series of solid-state switches to control the amount of power that is supplied to the heating elements. This allows for very precise temperature control.

The temperature controller is typically located on the front of the oven and has a digital display that shows the current temperature. The controller also has a number of buttons and knobs that can be used to set the desired temperature, curing time, and other parameters.

Here are some of the key features of a temperature controller for an electric powder coating oven:

Accuracy: The temperature controller must be able to accurately measure and control the oven temperature. This is important to ensure that the powder coating cures properly.
Repeatability: The temperature controller must be able to repeat the same curing temperature consistently. This is important to ensure that the powder coating finish is uniform.
Ease of use: The temperature controller should be easy to use and program. This is important to ensure that the oven can be operated efficiently.

Safety features: The temperature controller should have safety features such as over-temperature protection and emergency stop.

When choosing a temperature controller for an electric powder coating oven, it is important to consider the type of powder coating you will be using, the size of the oven, and your desired finish. You should also consult with a powder coating specialist to get their recommendations.

Here are some additional tips for using a temperature controller for an electric powder coating oven:

Calibrate the temperature controller regularly to ensure accuracy.
Monitor the oven temperature closely during the curing process.
Make sure that the oven is properly ventilated to remove powder coating fumes.
Ground the oven to prevent electrical shock.

By following these tips, you can help to ensure that your temperature controller is used safely and effectively.

An Electronic Temperature Controller controls temperature conditions. It is a non-profiling type 1/16 DIN single-channel controller that features automatic control. Either a time-proportioned heat output or a 4-20 ma control signal is used for precise temperature control

Overtemperature Protection

Electric Ovens for Powder Coating

Overtemperature protection is a safety feature that automatically shuts down an electric powder coating oven if the temperature exceeds a certain threshold. This is important to prevent the oven from overheating and causing a fire.

There are two main types of overtemperature protection systems used in electric powder coating ovens:

Bimetallic thermostats: Bimetallic thermostats are the most common type of overtemperature protection system used in electric powder coating ovens. They consist of two strips of metal with different coefficients of expansion. As the temperature rises, the strips expand at different rates, causing the thermostat to trip and shut down the oven.
Resistance temperature detectors (RTDs): RTDs are another type of overtemperature protection system that can be used in electric powder coating ovens. They measure the temperature of the oven chamber using a resistance element. As the temperature rises, the resistance of the element increases. If the resistance exceeds a certain threshold, the RTD will trip and shut down the oven.

Overtemperature protection systems are typically located in the oven chamber and are wired to the oven’s control system. If the temperature exceeds the set threshold, the overtemperature protection system will trip and shut down the oven.

Advantages of overtemperature protection:

Prevents the oven from overheating and causing a fire
Protects the oven and its components from damage
Extends the lifespan of the oven

Disadvantages of overtemperature protection:

Can cause downtime if the oven trips frequently
Can be expensive to repair or replace if it fails

Tips for using overtemperature protection safely and effectively:

Set the overtemperature protection system to a temperature that is slightly above the curing temperature of the powder coating. This will help to prevent the oven from tripping frequently.
Test the overtemperature protection system regularly to ensure that it is working properly.
Keep the oven chamber clean and free of debris to prevent the overtemperature protection system from tripping.
Have a qualified electrician repair or replace the overtemperature protection system if it fails.

By following these tips, you can help to ensure that your overtemperature protection system is used safely and effectively to protect your electric powder coating oven.

An Electronic Temperature Controller is provided for temperature protection. The Electronic Temperature Controller will remove power to the heating system when an over-temperature condition is detected. Alarm circuitry may be included as an option.

Process Timer

A process timer in an electric powder coating oven is a device that controls the amount of time the powder coating is cured for. It is an important component of the powder coating process, as the curing time must be precisely controlled to ensure the desired finish.

There are two main types of process timers used in electric powder coating ovens:

Mechanical timers: Mechanical timers are the most common type of process timer used in electric powder coating ovens. They are relatively inexpensive and easy to use.
Digital timers: Digital timers are more expensive than mechanical timers, but they offer more features, such as the ability to program multiple curing times and to display the remaining curing time.

The process timer is typically located on the front of the oven and has a digital display that shows the remaining curing time. The timer also has a number of buttons and knobs that can be used to set the curing time and other parameters.

Here are some of the key features of a process timer for an electric powder coating oven:

Accuracy: The process timer must be able to accurately measure and control the curing time. This is important to ensure that the powder coating cures properly.
Repeatability: The process timer must be able to repeat the same curing time consistently. This is important to ensure that the powder coating finish is uniform.
Ease of use: The process timer should be easy to use and program. This is important to ensure that the oven can be operated efficiently.

Safety features: The process timer should have safety features such as an emergency stop.

When choosing a process timer for an electric powder coating oven, it is important to consider the type of powder coating you will be using, the size of the oven, and your desired finish. You should also consult with a powder coating specialist to get their recommendations.

Here are some additional tips for using a process timer for an electric powder coating oven:

Set the process timer to the curing time specified by the powder coating manufacturer.
Monitor the curing process closely to ensure that the powder coating cures properly.
Do not open the oven door until the process timer has expired.
Inspect the powder coating finish after curing to ensure that it is uniform and free of defects.

By following these tips, you can help to ensure that your process timer is used safely and effectively.

A Process Timer is provided, which has five user-selectable timing ranges from 0.01 seconds to 9999 hours. The timer will automatically start timing once the process setpoint temperature is reached. When the total preset time has elapsed, power to the heat control circuitry will be disabled.

Additional Features of the Electric Ovens for Powder Coating

Electric ovens for powder coating can be equipped with a variety of additional features to improve their performance, efficiency, and safety. Some of the most common additional features include:

Heat recovery systems: Heat recovery systems capture and reuse exhaust heat from the oven chamber. This can significantly improve the energy efficiency of the oven and reduce operating costs.
Air filtration systems: Air filtration systems remove powder coating fumes and dust from the exhaust air. This helps to improve air quality in the workplace and protect workers from respiratory problems.
Data logging systems: Data logging systems record the oven temperature, curing time, and other parameters during the curing process. This data can be used to troubleshoot problems, ensure quality control, and optimize the powder coating process.
Programmable logic controllers (PLCs): PLCs are powerful control systems that can be used to automate the powder coating process. PLCs can be programmed to control the oven temperature, curing time, and other parameters, as well as to load and unload parts from the oven.
Robotic loading and unloading systems: Robotic loading and unloading systems can be used to automate the loading and unloading of parts from the powder coating oven. This can help to improve throughput and reduce labor costs.

Other additional features that may be available include:

Variable speed fans: Variable speed fans allow for more precise control of the airflow in the oven chamber. This can help to improve the uniformity of the powder coating finish.
Touchscreen controls: Touchscreen controls make it easy to operate and program the oven.
Remote monitoring: Remote monitoring systems allow operators to monitor the oven temperature, curing time, and other parameters remotely. This can be useful for large powder coating operations or for operations that run multiple ovens.

The specific additional features that are available will vary depending on the manufacturer and model of the oven. It is important to choose an oven with the features that are important to your specific needs and budget.

EMS Powder Coating Equipment ovens are designed with the capability to incorporate many other optional features for safety purposes, enhanced process control, and a simplified operator interface. Consult a Gruenberg Applications Engineer or our Service Department for more information or questions.

Operating Parameters and Requirements

This equipment is designed to operate safely when the following environmental conditions are met:

Indoor use only.
Within a temperature range of 5°C to 90°C (max).
Maximum relative humidity 90%.

The listed chamber specifications are based on operation at 24° C ambient temperature, the altitude at sea level, and a 60 Hz power supply. Chamber operation utilizing a 50 Hz power supply may derate the listed performance specifications. Equipment damage, personal injury, or death may result if this equipment is operated or maintained by untrained personnel.

Operators and service personnel must be familiar with the location and function of all controls and the inherent dangers of the equipment before operating or maintaining it. TPS shall not be liable for any damages, including incidental and/or consequential damages, regardless of the legal theory asserted, including negligence and/or strict liability.

Observe all safety warnings and operating parameters listed in this manual, as well as all Caution, Danger, and Warning signs or labels mounted on the equipment to reduce the risk of equipment damage and personal injury.

Location and Installation of the Electric Ovens for Powder Coating

Electric Ovens for Powder Coating

Oven Classification – Electric Heated Units: NFPA 86 Class B ovens are heat utilization equipment operating at approximately atmospheric pressure wherein there are no flammable volatiles or combustible material being heated in the oven.

Do not locate units in areas of wide ambient temperature variation such as near vents or outdoor entrances.
Do not place the unit near combustible materials or hazardous fumes or vapors.
Do not install the unit in a corrosive environment. A corrosive environment may lead to poor performance and deterioration of the unit.
Ventilation: The oven should be installed in an area where there is good air ventilation. Allow a minimum of 5 inches between any wall and any oven side.

Do not position the oven in a manner that would make it difficult to operate your main power disconnect switch.

Make sure the oven is leveled when set up. The floor of the chamber should be leveled with a Spirit Level to +/- 1/8” (3.175 mm) front to back and side to side.

Sometimes control panels are removed to facilitate shipment. When required, replace the panel securely and reconnect numbered electrical wires to matching numbered terminal blocks.

Very Important! Upon completion of the initial installation of the chamber and upon completion of any maintenance procedure, make sure that all access panels that have been removed are reinstalled securely before operating the unit.

Exhaust Connection for Electric Ovens for Powder Coating

A two-inch exhaust port is provided at the top of the oven to purge moisture or undesirable vapors given off by your heating process.

When exhausting undesirable/harmful vapors, an exhaust duct should be connected to the port and run to a location outside of the building, in accordance with all local code regulations. As an option, an exhaust kit may be provided for the connection of the 2-inch port to an exhaust stack

Air Circulation System of Electric Ovens for Powder Coating

Electric Ovens for Powder Coating Inside Airflow Channels

The air circulation system of an electric powder coating oven is responsible for distributing the heat evenly throughout the oven chamber. This is important to ensure that the powder coating cures properly and that the finish is uniform.

There are two main types of air circulation systems used in electric powder coating ovens:

1. Convection ovens: Convection ovens use fans to circulate the air around the parts. This helps to create a uniform temperature throughout the oven chamber and to speed up the curing process.

2. Forced convection ovens: Forced convection ovens use a combination of fans and ducting to circulate the air around the parts. This allows for more precise control of the airflow and can help to achieve a more uniform finish.

The air circulation system is typically located inside the oven chamber and is powered by an electric motor. The fans are typically mounted on the sides or top of the oven chamber and blow air over the parts.

Here are some of the key features of an air circulation system for an electric powder coating oven:

Uniform heating: The air circulation system must be able to distribute the heat evenly throughout the oven chamber. This is important to ensure that the powder coating cures properly.
Airflow control: The air circulation system should have adjustable airflow control. This allows operators to adjust the airflow to meet the specific needs of the powder coating job.
Energy efficiency: The air circulation system should be energy efficient. This is important to reduce operating costs.
Ease of maintenance: The air circulation system should be easy to maintain. This is important to keep the oven running smoothly and efficiently.

When choosing an air circulation system for an electric powder coating oven, it is important to consider the size of the oven, the type of parts being coated, and the desired finish. You should also consult with a powder coating specialist to get their recommendations.

Here are some additional tips for using an air circulation system for an electric powder coating oven:

Inspect the air circulation system regularly for damage or wear and tear.
Clean the air circulation system regularly to remove dust and debris.
Adjust the airflow control to ensure that the air is distributed evenly throughout the oven chamber.
Make sure that the oven is properly ventilated to remove powder coating fumes.

By following these tips, you can help to ensure that your air circulation system is used safely and effectively.

A high-volume compound horizontal airflow system is employed with the electric heating system to provide maximum temperature uniformity. The heating and generation of airflow occur in the conditioning plenum,
which is normally located on the right side wall of the oven. Airflow is generated by propeller-type fans at approximately 2400 CFM. The fans are driven with extended shafts by motors mounted in the control cabinet.

Heating is achieved with Incoloy sheathed type tubular heaters, which are suspended in the conditioning plenum. This location prevents direct radiation to the product. To condition the workspace, Model MPC35.21 ovens utilize one heater bank with one circulation fan, and the Model MPC45.96 – 2D ovens utilize two heater banks with two circulation fans.

When additional heated modules are added to the MPC45.96 series, the plenums will be identical in construction and controlled by the same conditioning circuitry

Airflow Description

Electric ovens using centrifugal-type blower wheels for airflow generation employ a horizontal front-to-back type airflow system. The burner manifold is designed with a vertically mounted flame tube along with perforations on the back side of the manifold. Processed air is drawn into the burner manifold and conditioning plenum, and is heated as it mixes with hot air emitted from the flame tube.

Fresh ambient air is also drawn into the plenum where it mixes with the heated air. Conditioned air is discharged into the workspace through perforations near the front of the plenum housing. The air flows back through the workspace in a horizontal manner to condition the product and then returns to the plenum for reconditioning.

A portion of the processed air is exhausted through a port in the chamber ceiling by the exhaust blower. An air intake port with a manual slide damper is installed in the ceiling of each module to allow fresh ambient air to replenish the exhausted air. Slide dampers are mechanically locked to a predetermined minimum opening.

Electric Heat Control System

Incoloy sheathed tubular heating elements are used to heat the oven. The unheated heater ends protrude through the wall of the oven and into the control cabinet where they are electrically terminated.

The heat control circuitry is enabled through the High Limit output of the Yokogawa UT150L Limit Controller, along with either one or two heat enable contractors (CON1 / CON2). In the Model MPC35.21, one contactor is used in both single and three-phase power-supplied units. In the Model MPC45.96 – 2D, one contactor is used with a three-phase power supply, and two contractors are used with a single-phase power supply.

Two contactors are required with a single-phase supply because the heaters are split into two separate circuits. The heaters are controlled by the time proportioned Heat Output of the Yokogawa UT150 Temperature Controller.

This output energizes a two-pole solid-state relay, which provides power to the heaters. The relay employs two SCRs in each pole in a back-to-back configuration. Zero cross-voltage switchings is employed to give precise temperature control with minimal noise generation.

Not only do we manufacture our powder coating equipment, we also ship them worldwide to your facility with care

We’re not just the manufacturers of your powder coating equipment, we’re also your worldwide delivery partners.

At EMS Powder Coating Equipment, we understand that getting your powder coating equipment to you quickly and safely is just as important as manufacturing it to the highest standards. That’s why we offer worldwide delivery services to all of our customers.

We work with a network of experienced and reliable shipping partners to ensure that your equipment arrives on time and in perfect condition. We also offer a variety of shipping options to fit your budget and needs.

Whether you need your equipment shipped to a local address or to an international destination, we can help. We’ll work with you to choose the best shipping option for your needs and to keep you updated on the status of your shipment every step of the way.

So when you choose EMS for your powder coating equipment, you’re not just getting the best products on the market, you’re also getting the best possible delivery experience.

Contact us today to learn more about our worldwide delivery services.

Transport of the powder coating equipment of our customers