What are the types of hollow blow molding? What are the advantages and disadvantages of each
1、 Blow molding is a processing method that uses compressed air to cause hollow plastic preforms in a highly elastic or plastic state to undergo expansion and deformation, and then cool and shape them to obtain plastic products. According to the type of blow molded products, this processing method can be divided into hollow blow molding and film blow molding. Our company has a place in Shanghai blow molding processing, Suzhou blow molding processing, etc.
1. Hollow blow molding: During hollow blow molding, it is necessary to place a highly elastic or plastic hollow plastic billet in a closed blow molding cavity, and then introduce compressed air into its interior to force its surface area to expand (blow) and adhere tightly to the cavity wall. After ZUI, it can be cooled and shaped to obtain hollow plastic products with a certain shape and scale. Suitable for various bottle and cylindrical plastic containers.
2. Film blow molding: Film blow molding is the process of using an extruder to shape molten plastic into thin-walled tube blanks. Compressed air is blown into the tube blanks from the center of the machine head, forcing them to undergo expansion and deformation at high temperatures and transform into tubular films (bubble tubes). The bubble tubes are then moved by traction to be compressed and stacked between rollers, and then transported by traction rollers and guide rollers to the winding roller. The winding roller then rolls them into film products, suitable for various packaging bags.
2、 Vacuum forming, also known as vacuum forming, belongs to the scale of sheet metal forming. It is a processing method that uses a vacuum pump to extract clean air from the closed cavity formed by the plastic sheet and the mold surface, and then uses atmospheric pressure to cause plastic expansion deformation of the sheet (increasing surface area and reducing thickness), and then adheres to the mold surface to transform it into a plastic product Vacuum forming is primarily used for packaging products, as well as for some components on daily utensils, instrument casings, toys, and household appliances.
