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Parallel Twin Screw and Barrel for Compounding Machine manufacturers take you to understand the application premise and methods of the barrel screw
Parallel Twin Screw and Barrel for Compounding Machine manufacturers tell you that the barrel screw is a rare product in the plastics industry, and it has been widely used in the plastics industry because of its own advantages. So what are the application prerequisites and methods of the barrel screw? Let's find out together!
Extruder screw barrel heating method:
The manufacturer of Parallel Twin Screw and Barrel for Compounding Machine tells you that resistance heating is generally used for machine heating, and thermocouples are used to complete segmented temperature control and side inspection. Resistance heating is to use resistance to generate heat to heat the barrel, and then transfer the heat to the plastic in the barrel. Resistance heating mainly includes strip heaters, cast aluminum heaters, ceramic heaters, etc. These heaters have the advantages of small size, ease of manufacture and maintenance.
The temperature range of the granulator barrel:
According to the different plasticizing state of the material along the axis of the screw, in order to make the degree of distribution of the barrel meet the requirements of the injection molding process, the heating of the screw machine needs to be stopped in stages to facilitate the improvement of the plasticizing ability. The manufacturer of Parallel Twin Screw and Barrel for Compounding Machine tells you that (3-5) Ds, (Ds is the rod diameter) is usually used as a heating temperature control section, and the heating temperature control shaking heave should generally not exceed 5 ℃, For heat-sensitive plastics, it should preferably not be greater than 2°C.
Extruder screw barrel heating power:
The manufacturer of Parallel Twin Screw and Barrel for Compounding Machine tells you that when judging the heating power of the barrel, in addition to the heat required for plasticization, it is also necessary to meet the requirements of the productivity of the injection molding machine, and the barrel has sufficient and fast heating rate.
Cooling of extruder screw barrel:
1. Under normal circumstances, the barrel does not need to be equipped with a cooling control system, and the process requirements can be satisfied by natural cooling. The manufacturer of Parallel Twin Screw and Barrel for Compounding Machine tells you that if the temperature of the feeding port is too high, the phenomenon of "bridging" will appear at the feeding port, making feeding difficult or even impossible.
2. In order to have excellent feeding and solid material conveying conditions and prevent the heat of the barrel from being transmitted to the transmission parts, a cooling jacket (slot) should be set at the feeding port of the barrel, and the cooling water volume can be adjusted according to the process requirements. Size, Parallel Twin Screw and Barrel for Compounding Machine manufacturers tell you that when heat-sensitive plastics are processed at a higher speed, it is necessary to cool and control the temperature of the machine to prevent thermal decomposition of heat-sensitive plastics.