How does the blow molding machine make plastic bottles?
How does the blow molding machine make plastic bottles? Since the vast majority of plastic beverage bottles are plastic, the production process of plastic bottles will be explained in detail in the following production method. Mainly start with PET bottles and polypropylene plastic bottles. The production of PET bottles mainly adopts the injection stretch blow molding process. The stretch blow molding process is divided into one-step processing method and two-step processing method. The one-step processing method means that the three main processes of preparing the parison, stretching and blowing in the stretch blow molding process are continuously completed in one machine, which is called the one-step processing method, also known as the hot parison method. A parison is a semi-finished product in the production process. The composition of the equipment is as follows: ① It consists of an extruder and a blow molding machine; ② it consists of an injection machine and a blow molding machine. Two-step processing means that the production process is carried out in two steps. The first step is to prepare the parison, which is called a semi-finished product to be processed after cooling, and has the characteristics of specialized production. The second step provides the cold parison to another enterprise or another workshop for reheating, stretching and blow molding, also known as the cold parison method. The output and process condition control of the two-step processing method are unmatched by the one-step processing method, which is suitable for mass production, but consumes more energy. Main products: blow molding machine
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