Back pressure back pressure refers to the screw reverse the accumulator back pressure to overcome. High back pressure in favor of the pigment dispersion and plastic melts, but at the same time extending the screw retraction time, reducing the length of the plastic fibers, increasing the pressure on the injection molding machine, and therefore lower the back pressure should generally not exceed injection 20% of the pressure. Foam injection molding, the back pressure should be less than the gas pressure in the formation of high plastic products, otherwise screw it will be launched barrel. Some back-pressure injection molding machine can be programmed to reduce the high-quality plastic products suppliers screw length compensation during the melt, this will reduce heat input, allowing the temperature to drop. However, as a result of this change is difficult to estimate, it is difficult for the machine to be adjusted accordingly. Plastic products are mixtures of synthetic resins and various additives as the raw material of plastic products partners, by injection, extrusion, pressing, casting and other methods made. Plastic molding also won the final performance, so plastics molding process to produce the key. Plastic Processors | integration into a plastic mold manufacturers (certified) | plastic products from Shenzhen harmony Technology Limited. Shenzhen harmony Technology Limited (www.rhctech.net) Guangdong Shenzhen, plastic products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. The integration into a plastic mold factory leadership with the staff warmly welcome all inquiries negotiations to create harmony into a plastic mold manufacturers a better future.