5/a Convectional Ovens
The desired outcome is for the combination of pretreatment, application, and cure to produce a coating with specific physical and chemical properties. Understanding the operation of a convection oven requires the examination of the systems at work within the unit. There are five major components in an oven: the shell, the heater, the supply system, the circulation system and the exhaust system.
Each of these has an essential function, is comprised of several interlocking parts, and is subject to problems from bad adjustment and misapplication. When they work together properly, they produce the process necessary for the successful cure of a coating.
The oven tunnel is self-supporting construction. The insulation panels are manufactured as sheet metal cassettes with tongue and grove joints. The panel frames consist of sheet metal plates with slots arranged in opposite, in order to prevent heat losses by leaks. The panels are fitted together by means of tongue and grove joints with a sealing groove, no clamping devices or screws are required.
Solvent or humidified air is exhausted by exhaust fans.
Air ducts are designed as to match the requirements of the shape and type of the parts.
5/b Infrared Ovenss
Infrared radiation can be used in a variety of different applications, from drying and curing to preheating before a convective oven.
It can be used with many substrate materials such as metal, glass, plastic, textiles, and wood.
Whether infrared radiation is used in the finishing process of organic coatings on products such as light fixtures, hot water tanks, shelving units, or insulated doors, line speeds can be drastically increased, and cost savings can be realized.
Also it’s used to reduce the orange peel affects on powder coating systems.
5/c Wood Imitation Film Transfer Ovens
The transfer machine is designed for wood or marble imitation film transfer applications to an aluminum profile surfaces and sheets. Base powder coated and bagged with film aluminum profiles are put onto the carrier and mounted to the special vacuum nozzles at two sides of the trolley. Using the vacuum valve, air is sucked from inside of bags to maintain touching of the film to the profile surfaces. All of the profiles are vacuumed by the same way and after finishing, by pressing Start button the carrier goes into the oven. The vacuum pump works constantly during the carrier is into the oven to provide maximum efficiency in the transfer. At the end of curing period, carrier automatically comes out of the oven. Compressed air system starts working and blows an air into the bags in order to provide un-sticking the film from the profile surfaces. The system is working fully PLC controlled and all parameters can be adjusted easily from the touch screen located on the control panel
5/D Heat Cleaning Ovens
Heat cleaning process ovens involves a chamber, an integral thermal oxidizing after-burner, temperature controls for burners, an air supply and a water mist injection system for controlling flash temperature that may occur when processing large loads of combustibles.
Heat cleaning ovens operates on the controlled air principal. Combustion and temperature are controlled by restricting air flow to the load.
Fire is smothered by limiting the oxygen necessary for combustion. Controlled air ovens are equipped with PLC control showing oven process temperature. When set temperature is reached air supply is automatically restricted. When the temperature drops down, burner comes back on and the air supply is automatically opened.
5/E Heat cleaning ovens process include an integral thermal oxidizing afterburner with its own temperature controller. This is sized to supply air to the process chamber exit gasses and bring gasses to 800-1.100°C or higher temperature for oxidizing fumes, smoke and odors being discharged from the load.
Most paints and volatile coating ignite in 260-600°C range, causing rapid temperature rise to the controls adjustable set point. This automatically shuts down the process chamber burner and air supply. As oxygen consumed, flame is extinguished and paint cleaning conditions are established.
5/F OUR OWN HIGH TEMERATURE OVENS
Our company manufactures ovens up to 1.000°C according to the customer demand for heat-treatment, curing or annealing processes.