The technological history of bottle blowing machine
Release time:
2024-04-09
Automatic bottle blowing machine is a kind of equipment that makes plastic into hollow containers by blow molding. Currently, 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 are first made into bottle embryos, and then blown. Nowadays, environmentally friendly plastics made of PET are generally used. Blow molding machine: After the liquid plastic is sprayed out, the wind blown out by the machine is used to blow the plastic body to a certain shape of the mold cavity to make a product. This machine is called a blow molding machine. It is also a type of blow molding machine, that is, a hydraulic blow molding machine.
Automatic bottle blowing machine is a kind of equipment that makes plastic into hollow containers by blow molding. Currently, 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 are first made into bottle embryos, and then blown. Nowadays, environmentally friendly plastics made of PET are generally used. Blow molding machine: After the liquid plastic is sprayed out, the wind blown out by the machine is used to blow the plastic body to a certain shape of the mold cavity to make a product. This 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 hot. After the mold is closed, compressed air is immediately introduced into the parison to inflate the plastic parison and make it adhere tightly to the inner wall of the mold. After cooling and demolding, various hollow products are obtained.
Enoch Ferngren and William Kopitke first demonstrated the blow molding process. The principle of this process originated from glass blowing. In 1938, Ferngren and Kopitke built a bottle blowing machine and sold it to the Hartford Empire Company. This was the beginning of commercial blow molding. In the 1840s, the variety and quantity of plastic products were very limited, so blow molding did not develop rapidly until later. As the variety of products increased and productivity increased, the number of plastic products made by blow molding soon increased. In the soft drink industry in the United States, the number of plastic containers has increased from zero in 1977 to 10 billion in 1999.
During World War II, the blow molding process began to be used to produce low-density polyethylene bottles. In the late 1950s, with the birth of high-density polyethylene and the development of blow molding machines, blow molding technology has been widely used. The volume of hollow containers can reach thousands of liters, and some production has been computer-controlled. Plastics suitable for blow molding include polyethylene, polyvinyl chloride, polypropylene, polyester, etc., and the resulting hollow containers are widely used as industrial packaging containers.
According to the parison making method, blow molding can be divided into extrusion blow molding and injection blow molding. The newly developed ones are multi-layer blow molding and stretch blow molding.
The extrusion process is to extrude the plasticized plastic into the extrusion blow die through a screw, and then cooperate with the mold below and compressed gas to realize the molding of the product.
The extrusion blow molding process consists of five steps: 1. Make the plasticized raw materials into plastic preforms; 2. Cut off part of the preforms and cut off the preforms by closing the mold; 3. Fill the mold cavity with gas to shape the preforms and cool them; 4. Open the mold and take out the molded container; 5. Trim the flash to get the finished product.
Yucheng Machinery specializes in the production of a series of bottle blowing machine equipment manufacturers. Due to its outstanding technology, the bottle blowing machines it produces are widely used in food packaging, cosmetic bottle making, candy food packaging and other fields.
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