The mold is then closed around the parison and the needle is inserted into the bottom of the mold.Other less common moldings include compression molding and rotational molding. Basically, the blow molding air fills the heated plastic cylinder, so that the plastic expands like a balloon and uniformly fills the molding die.Blow molding is a fast and economical way to make hollow plastic products and packaging.

Injection molding does not use any type of blower.As a professional Pet Preform Manufacturerswith many years of experience, Jilian Mold can develop the best product production plan for you, find the best product production technology, and create satisfactory products for you. The plastic is then cooled and the finished bottle, can or can is removed from the molding press.Blow molded articles are typically hollow and are typically used to hold liquids.The extrusion blow molding process is carried out in two stages: the first step involves the manufacture of a soft molten plastic tube called a parison.. After the plastic is cooled, the finished product can be used.Blow molding and injection molding are two of the most common Pet Preform Mouldforming methods.In the second step, air is forced through the needle, causing the parison to expand until it fills the cavity.

Injection molding, on the other hand, can be used to make solid plastic parts, fittings, toys, utensils, caps, and plastic tools, parts, and products of various complex designs. Instead, the heated plastic is injected into the mold under high pressure.

Compression molding uses a heated half mold to press a piece of hard plastic.Rotational molding essentially rotates the mold slowly, using gravity to coat the molten plastic onto the cavity walls of the mold.

The pressure ensures that every space in the mold is filled with plastic. The parison is located between the two halves of the molding press. Because air is not used, products made by injection molding are generally not Barrel Moulds Manufacturers hollow