Mechanical knowledge: introduction and function of hollow blow molding machine

Mechanical knowledge: introduction and performance of hollow blow molding machine

The hollow plastic parison obtained by extrusion or injection molding of plastic is heated (or heated to a softened state), placed in a very split mould, and compressed gas is introduced into the parison now when closing the mould, and is blown out by the machine. The wind force causes the plastic parison to be inflated and adhered to the inner wall of the mould, and therefore the plastic body is blown to a cavity of a definite form, and is cooled and demolded to get varied hollow merchandise. This machine is named a blow molding machine.

The producing method of the blown film is extremely similar in theory to the blow molding of hollow merchandise, however it doesn't use a mould. From the attitude of classification of plastic process technology, the molding method of the blown film is sometimes enclosed within the extrusion. The blow molding method began to supply rarity polythene vials throughout the Second war. With the birth of high-density polythene and therefore the development of blow molding machines, blow molding technology has been wide used. Hollow containers is up to many thousand liters in volume, and a few are pc controlled. appropriate plastics for blow molding embody polythene, polyvinyl resin, plastic, polyester, etc. The ensuing hollow containers square measure wide used as industrial packaging containers.