Injection Molding Process And Blow Molding Machine

Update:27 Aug 2018

The blowing molding machine can plasticize the preforme […]

The blowing molding machine can plasticize the preformed product by heating, and then enter the mold to blow mold. This method is mainly used for the production of high-speed and high-yield PET bottles and BOPP bottles, that is, two-step process; blowing molding machine can also be used.


The injection molding process is combined into a machine for injection and blow molding, which is also a common method for producing containers in PET; the plastic is melted and quantitatively extruded in a screw extruder, and then formed through a dough film, and then cooled by a wind ring, and then The tractor is towed at a certain speed and the winder winds it into a roll. After the liquid plastic is sprayed out, the wind is blown out by the machine, and the plastic body is blown to a cavity of a certain shape to make a product.


This machine is called a blow molding machine. The plastic parison is placed in the split mold, and compressed air is introduced into the parison immediately after the mold is closed, so that the plastic parison is inflated and adhered to the inner wall of the mold, and is cooled and released to obtain various hollow products. The manufacturing process of the blown film is very similar in principle to the blow molding machine of hollow products, but it does not use a mold. From the perspective of classification of plastic processing technology, the molding process of the blown film is usually included in the extrusion.

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