Curing oven of powder coating system
The curing oven is one of the most important equipment in the production line of powder coating equipment, and its temperature uniformity is an important index to ensure the quality of the coating.
The heating way of the oven is: radiation, hot air circulation and electricity, coal, bio-particles, diesel, natural gas, etc. According to the production plan can be divided into single and through type. The equipment form has straight through and bridge type. Hot air circulation oven has good heat preservation, uniform temperature in the furnace and less heat loss. After testing, the temperature difference in the furnace is ± 3℃, reaching the performance index of the similar products of the advanced countries.
The oven inside and outside is made of galvanized plates 0.6mm,the middle is 150mm rock wool board.
Curing/Drying Oven
Curing oven system. Divided into bridge type, tunnel type,box type curing oven.
Tunnel Type Curing Oven
• Tunnel Furnace Is Suitable For Long and Thin Products Such As Pipes，Aluminum Profiles,Support Posts etc;
• Heating Source: Natural Gas/LPG/Diesel/Electricity, Etc.
• There Are Air Curtains At Both Ends Of The Tunnel Furnace to prevent heat loss,Saves the fuel,This is our patent;
• Oven Heat Distribution, Temperature Difference Is Controlled Within ±3°
• Fast Heating Speed And High Efficiency
• International Brand, High Degree Of Safety
Tunnel Type Curing Oven
● Tunnel type curing ovens are designed with a conveyor belt system that moves workpieces through a tunnel-shaped chamber.
● The oven is typically long and narrow, with the conveyor belt running through the center of the chamber.
● Heating elements are positioned along the walls or ceiling of the tunnel to provide consistent heat distribution. And wind curtain at both ends to efficiently prevent heat loss of the oven.
● Tunnel type ovens are well-suited for continuous production lines with high throughput requirements.
Reasonable heat ventilation system design makes air circulation perfectly balanced and keeps furnace temperature stable. Gas burner type, 100% of heat flows into the furnace, high efficiency and no waste.
Tunnel ovens can be built directly on the ground, which is relatively cheaper than bridge curing ovens, but its thermal insulation is relatively weak due to heat conversion. This design is more suitable for long workpieces rather than wide workpieces. If the tunnel door is too wide, the air curtain will not be strong enough for heat conversion, which will cause heat loss, slowing down the oven heating speed and increasing electricity bills.
If you choose the power and free conveyor system,the tunnel oven will be suitable for it.
Bridge Type Curing Ovens
1.Same Heat Distribution: The temperature is kept consistent and the temperature difference is controlled within ±3°. This uniformity is the key for stable quality;
2.Adjustable: It can be designed to suit different sizes, shapes of products, meeting various of requirements.
3.Save Energy : Hot air flowing around the top area will not convert with the cold air outside, thereby reducing energy consumption.
4.Save Labor Cost:Workers can go directly through under the oven,reducing the walking path.
5.Save Space: The burner chamber will be installed under the oven,occupy a smaller space than tunnel type oven.
Bridge Type Curing Ovens
The bridge oven is installed on the metal frames,the burner chamber is under the oven,so save space,and people can cross the oven from the bottom,products can transport from the bottom,save manual labor;
and the bridge oven is suitable for most of the products which are long and wide；
The structure has a perfect functional design in terms of heat insulation, and the hot air flowing around the top area will not convert with the cold air outside, thereby reducing energy consumption. Usually, when we use a bridge curing oven, the longer the workpiece, the larger the turning radius. The higher the workpiece, the conveying track will be relatively higher than the ground, which will make the design more difficult and the construction cost higher.
If you choose the automated conveyor system,the bridge type will be suitable for it.
Box Type Curing Ovens
1.Economical，Stable and Durable;
2.Occupy a small space,
3.Easy to operate and maintain;
4.Suitable for small scale and small workpieces;
Box Type Curing Ovens
The box type oven is usually designed for manual powder coating line(slide in track line)
The oven inside and outside is made of galvanized plates 0.6mm,the middle is 150mm rock wool board.
The conveyor chain is semi-automated,it is independent from the slide in track
The Heating system of the oven
The heating system mainly consists of chamber, burner(heating exchanger), hot air circulating fan,air ducts,etc;
Heating Sources: Gas /LPG/ Diesel / Electricity and so on,optional；
Our burner is fast heating, high efficiency and be equipped with proportional adjustment, frequency conversion. International brand:Riello.
The heating chamber is installed on the oven left and right side(according to the plant layout), with the oven body as a connected structure;
The heating chamber have the maintain door, easy to maintenance and can be used as the new air inlet for quickly reducing the oven temperature.
The Heating system of the oven
Temperature Control System
(1) It is made up of temperature measurement system, temperature control system and over temperature alarm system.
It’s through the sensor, digital temperature controller, AC contactor control device automatically complete the whole process of temperature measurement and control.
(2) The oven tunnel control system is measured by the temperature sensor signal by digital temperature controller with the set temperature value (Analog) comparison of the output command signal to control the working state of the heater, so as to achieve the temperature control / display.
Hot Air Circulation Fan
(1) The circulating hot air is fed into the air supply pipeline of the drying channel through a circulating fan, and then the air outlet pipe is evenly distributed in the passage through the air outlet, there is a damper adjusting device to ensure the uniformity of the air supply.
(2) All hot air circulation air ducts are arranged in the passage, and the air supply duct and the air outlet are all made of 1.0mm galvanized sheets
(3) Hot air circulation mode: using bottom air supply, upper air return.
Design and produce automatic coating production lines according to customers’requirements
We are developing, producing and selling high quality and customized turnkey solutions for surface treatment lines.
We will produce automatic coating lines in any configuration to solve our customers' business tasks.
Versatile Sizing Options:
Curing ovens come in a range of sizes to suit the requirements of different applications. From small- to medium-sized parts that can be cured in compact benchtop ovens to larger industrial-scale production environments, there are options available to meet diverse needs.
Temperature Control and Curing Parameters:
The curing process involves heating coated parts to specific temperatures for a predetermined duration. Most powders typically require curing temperatures between 160-200°C and curing times ranging from 10 to 20 minutes. However, variations in powder types may necessitate adjustments in temperature and time. It's essential to follow the manufacturer’s instructions to achieve optimal results.
Key Role in Powder Coating:
Curing ovens provide the heat necessary to cure the powder coating, resulting in a smooth and durable finish. They ensure that the coating adheres properly to the substrate, offering resistance to corrosion, abrasion, and other environmental factors.
Considerations for Selection:
When selecting a curing oven, factors such as the size of the parts being coated, production volume, and specific requirements of the powder coating process need to be considered. This ensures that the chosen oven is capable of delivering consistent and reliable results.
