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Heating and Cooling Methods of Plastic Extruder Barrel

by:TENGDA     2023-01-13

​ Heating and cooling are necessary conditions for smooth extrusion of plastics. In order to keep the plastic extruded within the temperature range required by its processing technology, it is generally achieved by continuously adjusting the temperature of the material in the barrel of the plastic extruder by means of heating or cooling.

The barrel heating of the plastic extruder is to provide heat for the plasticization of the raw materials in the barrel, and the barrel cooling is to prevent the raw materials from being extruded and frictionally plasticized to generate excessive heat and increase the temperature. Alternate use of heating and cooling to control the heat of the barrel of the plastic extruder
It is made within the process temperature range required by the plasticization of raw materials to ensure that the plastic extruder can continue to produce normally. Barrel heating methods: resistance heating, electric induction heating, heat carrier heating. There are two cooling methods: water cooling and air cooling.

The heating method of the plastic extruder adopts the resistance heating method, and the heater adopts a cast aluminum heater. The resistance wire is put into a metal tube and filled with insulating materials such as magnesium oxide to make an electric heating rod, which is bent according to the required shape, and then Cast in aluminum alloy. It has small dimensions, light weight, convenient assembly and disassembly, high heating temperature, long service life, and has the properties of moisture-proof, shock-proof and explosion-proof.
However, the plastic extruder adopts the air-cooling method, mainly using air cooling, that is, an electric blower is used to supply air, and the wind is blown to the part of the barrel that needs to be cooled, and the heat of the barrel is taken away, so that the barrel can achieve the purpose of cooling, but cooling slow.
The plastic extruder produced has the characteristics of simple structure, small thermal shock, no pollution, concentrated wind, high cooling efficiency, convenient installation and maintenance, superior quality and wide application.

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