Automatic bottle
blowing machine is a kind of equipment that makes plastic into hollow containers by blow molding. At present, the more common models include hollow extrusion blow molding machine, injection stretch blow molding machine, multi-layer hollow extrusion blow molding and stretch blow molding. At present, most of the blow molding machines are still two-step blow molding machines, that is, the plastic raw materials must be made into preforms and then blown. Nowadays, environmentally friendly plastics made of PET are commonly used. Blow molding machine: After the liquid plastic is sprayed out, the wind blowing from the machine is used to blow the plastic body to a certain shape of the mold cavity to make a product. This kind of machine is called a blow molding machine. It is also a type of blow molding machine, that is, a hydraulic blow molding machine. The tubular plastic parison obtained by extrusion or injection molding of thermoplastic resin is placed in a split mold while it is still hot, and compressed air is introduced into the parison immediately after the mold is closed, so that the plastic parison is inflated and adheres to the inner wall of the mold. After cooling and demoulding, various hollow products are obtained. Enoch Ferngren and William Kopitke were the first to demonstrate the blow molding process. The principle of this process originates from the blowing of glass supplies. In 1938, Ferngren and Kopitke built a blow molding machine and sold it to the Hartford Imperial Company. This is the beginning of the commercial blow molding process. In the 1840s, the variety and quantity of plastic products were very limited, so the blow molding process did not develop rapidly until much later. With the increase in product types and productivity, more and more plastic products are soon produced by blow molding. In the US soft drink industry, the number of plastic containers has grown from zero in 1977 to 10 billion in 1999. The blow molding process began to be used to produce low density polyethylene vials during World War II. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology was widely used. The volume of hollow containers can reach thousands of liters, and some production has adopted computer control. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the obtained hollow containers are widely used as industrial packaging containers. According to the method of making the parison, blow molding can be divided into extrusion blow molding and injection blow molding. The newly developed ones include multi-layer blow molding and stretch blow molding. The extrusion process is to extrude the plasticized plastic into the extrusion blowing die head through the screw, and then cooperate with the lower mold and compressed gas to realize the molding of the product. The extrusion blow molding process consists of 5 steps: 1. The plasticized raw material is made into a plastic parison; 2. Part of the parison is cut off by closing the mold; 3. The mold cavity is filled with gas to make the mold The embryo is formed and cooled; 4. Open the mold and take out the formed container; 5. Trim the flash to obtain the finished product. Specializing in the production of series of blow molding machine equipment manufacturers, due to its excellent technology, the blow molding machines produced are widely used in food packaging, cosmetic bottle making and candy food packaging and other fields.
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