Packing stages: packing stage role is continuously applied pressure, compaction melt plastics increased density (densification), to compensate for plastic shrinkage behavior. In the packing process, because the cavity has been filled plastic, high back pressure. In the packing compaction process, injection molding machine screw is only slowly moving forward in small, plastic flow speed is also relatively slow, then the flow of said pressure flow encumbered. Since the packing stage, plastic mold wall is cooled and solidified by the accelerated increase in melt viscosity soon quality appliances injection mold, so mold cavity of opposition. In the late packing and material density continues to increase, gradually molding plastic parts, packing stage continued until the gate curing seal, at which point the packing phase of the mold cavity pressure reaches the maximum value. In the packing stage, the pressure is very high, showing part of a compressible plastic characteristics. In the high pressure zone, plastics more dense, higher density; lower regional appliance pressure injection mold design, plastic is more loose, low density, resulting in changes in the location and density distribution change over time. Plastic packing process in a very low flow rate, flow no longer play a leading role; pressure as the main factors affecting the packing process. Plastic packing process in the mold cavity has been filled, then gradually solidified melt pressure as the transfer medium. Mold cavity pressure is transmitted to the aid of plastic mold wall surface, there is a tendency distraction mold, requiring proper clamping force clamping. Clamping force up under normal circumstances will be slightly softened the mold, the mold having an exhaust helpful; but up clamping force is too large, easily lead moldings edges, burrs appliances injection mold rent, even softened mold. Therefore, the choice of injection molding machines, injection molding machine should be selected appliances injection mold clamping force large enough to prevent the rise mode phenomenon and can effectively packing. In recent years, with the rapid development of the plastics industry and general engineering plastics and continuously improve the strength and precision, the application range of plastic products is also expanding, such as: household appliances, instruments, construction equipment, automotive, fields and other daily-use hardware, plastic products, the rapid increase in the proportion of positive. A well-designed plastic parts often replace the more traditional metal. Appliances injection mold specification, Shi Rui plastic mold, home appliances injection mold Ltd. Dongguan City by Shi Rui plastic mold. Dongguan Shi Rui Plastic Co. (www.dgsrmj.com) Dongguan, Guangdong, plastic leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Rui Shi plastic mold in leadership with the staff warmly welcome all inquiries negotiations to create facilities sharp plastic mold a better future.