screen changer heating cooling device
Heating and cooling are necessary conditions for the screen changer extruding process.
(1) Nowadays, the screen changer extruder usually uses electric heating, which is divided into resistance heating and induction heating. The heating device is made up of plastics in external heating cylinders to heat up to the temperature required for operation.
(2) The cooling device is designed to ensure that the plastic is within the temperature range required by the process. Specifically, to eliminate excess heat generated by the shear friction of the screw rotation to avoid the difficulty of decomposition, scorching, or shaping of plastics due to high temperatures. Machine cylinder cooling is divided into two kinds of water cooling and air cooling, the general small and medium sized extruder is more suitable to use air cooling, large use water cooling or two forms combined cooling; The screw cooling mainly uses the center water cooling, the purpose is to increase the material solid conveying rate, stabilize the gelatinize quantity, and improve the product quality. But the cooling at the hopper is to strengthen the transport of solid materials, to prevent the heating of the plastic particles to become sticky and clog the outlet, and to ensure that the transmission part is positive.
The auxiliary equipment of the plastic granulator(screen changer) mainly consists of wire release device, straightening device, preheating device, cooling device, traction device, rice meter, Spark test machine and wire collection device. Extruder units are used for different purposes, and their choice of auxiliary equipment is different. For example, there is Qieduanqi, dryer, printing device