The spray head of the spray plastic bottle is made of polyvinyl chloride, and its production type is mass production. The spray material of spray plastic bottles, PVC, is a thermoplastic.

From the performance point of view, PVC materials are flame-retardant and self-extinguishing, without dripping, in addition, they have high strength, good weather resistance and good geometric stability. From the perspective of dielectric properties, polyvinyl chloride has good electrical insulation and chemical stability. From the perspective of molding, polyvinyl chloride has good water absorption, poor fluidity of melt, low shrinkage, and molding is not easy. . Also, spray plastic bottles are prone to defects such as insufficient pouring and shrinkage during molding. When the molding temperature is relatively high, hydrogen chloride is easily decomposed, and the injection speed is too fast to produce deflation. Therefore, when molding, you should pay attention to controlling the molding temperature and the residence time. The injection system should be thick and short, the inlet section should be larger, and the cooling time should not be too fast. You should choose a large-diameter nozzle.

The precision requirements of the structure and size of spray plastic parts of spray plastic bottles are relatively high. In order to obtain qualified plastic parts, in addition to reasonable selection of raw materials for plastic parts, the structural manufacture ability of plastic parts should also be considered. The structural manufacture ability of plastic parts has a direct relationship with the design of the mold. Process requirements can design a reasonable mold structure, which can prevent bubbles, shrinkage, depressions and cracks during molding, which can also improve the production efficiency of spray plastic bottles and reduce part of the cost. When designing the plastic parts of the spray plastic bottle, the surface of the parts should be free of defects and burrs, and the phenomenon of insufficient pouring should not occur. If there are no special surface quality requirements, such requirements are still well realized. Therefore, it is the ultimate goal to choose the appropriate injection molding process parameters and obtain the highest production efficiency and economic benefits with the lowest energy and raw material consumption.