Injection molding process


The moulding cycle of injection moulding is composed of […]

The moulding cycle of injection moulding is composed of mould clamping time, filling time, pressure holding time, cooling time and demoulding time. Among them, the cooling time accounts for a large proportion, about 70% to 80%. Therefore, the cooling time will directly affect the length and output of plastic products.

During the demoulding phase, the temperature of the plastic product should be cooled below the thermal deformation temperature of the plastic product to prevent the plastic product from being loosened due to residual stress or warped and deformed by the external force of the mould. Plastic is a measure of the speed at which plastic conducts heat from a hot place to a cold place.

The higher the thermal conductivity of plastic, the better the thermal conductivity, or the lower the specific heat of the plastic, the temperature is likely to change, so the heat is easily dissipated, the thermal conductivity is better, and the required cooling time is shorter. Among industrial products, injection moulded products are: kitchen supplies (trash cans, chairs, stools, bowls, buckets, pots, tableware, and various containers), housings for electrical equipment (hair dryers, vacuum cleaners, food mixers, etc.), toys With games, various products for the automotive industry, many other product parts, etc.

Injection moulding is a moulding process that presses a heat-softened plastic material from a cylinder into a relatively cold cavity to form the product into the desired shape. Injection moulding is a manufacturing technology for parts made of plastic. Molten plastic is injected into injection moulds under high pressure. The moulds are made by injection mould makers, usually made of steel or aluminum, and precision-machined to form the shape of the desired part. , Injection moulding is very widely used to make various parts, from small parts to the entire car body panel.

Injection moulding is a relatively new way of manufacturing parts. It is a fast process used to produce a large number of identical items from high-precision engineering parts to disposable consumer goods. Injection moulding is often used for mass production, which produces products such as bottles Small products such as lids, sink plugs, children's plastic toys, plastic containers, model kits, disposable razors and camera parts, the process can even mould large items such as hulls and automotive plastic enclosures.

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