What is the difference between pc screw barrel and ordinary screw barrel?What is the difference between pc screw barrel and ordinary screw barrel?
PC screw barrel has the advantages of high transparency, good impact toughness, wide temperature range and so on.
How to choose pc screw barrel?
1. The injection temperature must integrate the shape, size and mold structure of the product;
2. The injection pressure has a certain influence on the physical and mechanical properties, internal stress and molding shrinkage of the PC products. It has a greater impact on the appearance and release properties of the products. The general injection pressure is controlled between 80-120MPa;
3. Holding pressure and holding time The size of holding pressure and holding time have a great influence on the internal stress of PC products. In actual processing, high material temperature and low holding pressure are often used to solve ;
4. Injection speed has no obvious effect on the performance of PC products. Except for thin-walled, small gate, deep hole, long-flow products, medium or slow processing is generally used, preferably multi-stage injection.
Difference between pc screw barrel and ordinary screw barrel:
The material of pc screw barrel should be better anti-corrosion, or the surface is hard chrome plated, at least so that the raw material will not be carbon on the surface area, the surface of the screw barrel should be smooth, Pc is a high-viscosity non-crystalline plastic, poor fluidity, heat for a long time It is easy to degrade, the feeding torque is large, it is difficult to melt, and it is easy to stagnate. It needs high material temperature and high pressure injection, and the material temperature adjustment range is narrow.