PP Bottle Forming Technology

The PP bottles are hollow molded by injection stretch blow molding, in which the molten PP of the injection molding machine is injected into the injection mold, and the transparent bottomed parison is formed by rapid cooling, and then the parison is heated inside and outside in another station to reach a certain temperature. Extend the preform by a certain percentage, and then refill it with compressed air to obtain the required hollow product. The characteristic of this molding method is that the axial and radial stretch ratios are the same, which can improve the mechanical properties, permeability resistance, transparency and reduce the wall thickness of the blow molded container. The thinnest process. It has the advantages of uniform wall thickness, good dimensional stability, light weight and high strength, so it has a wide range of applications. Injection stretch blow molding process can be divided into fully automatic one-step method and fully automatic two-step method. The characteristic of the two-step process is that the preform is completed on a special high-speed injection molding machine, and its production efficiency is generally higher. Because there is no need to dry the raw materials, and there is no need to process the bottles such as styling and crystallization at the mouth, so the process is easier to control, less equipment, and greater flexibility. For the production of hot-filled bottles, the adjustment time for the equipment is also very short.



Ningbo Ruichang Commodity Packaging Co., Ltd. is a professional China manufacturer and supplier of PP Bottle . All products from square bottles to PP bottles are packed in cosmetic vacuum bottles, designed to make your cosmetic bottles easy to use every day, thereby protecting the contents from pollution and chemical changes. Welcome to consult and order: https://www.ruichangpacking.com/