What is Plastic Molding

Update:29 Apr 2020

What is Plastic Molding?

Plastic molding is a manufacturing process for plastic components. It allows the plastic to be various items with all shapes and sizes more flexible by different plastic molding techniques. Each molding has its benefits and is best suited for the manufacturing of specific projects.
For a quick know, major types listed for your reference:

Plastic Injection Molding

Melting plastic is injected to a steel mould, and then a plastic product is created after cooling and mould open.

Injection molding is the most common method for mass-production of plastic product, such as chairs and tables, kitchen utensils, toys, containers, many car parts, bottle caps, etc.

Plastic stretch blow molding
They are similar to injection molding, just the liquid plastic be fed to mould but then be pressed by air to ensure it meet the inner surface in mould. Finally form a hollow part after cooling.
Blow molding products are popular among bottles, tubes and jar containers.

Plastic Extrusion Moldings

Profile extrusion is extrusion of a shaped product which can be solid and hollow but does not include sheet or film products.

Products ranging from weather stripping to window frames are considered profile extrusion.

Tube extrusion molding is easy for understanding that through the total equipment, finally get the tubing items, such as PVC pipes.
Film extrusion molding achieves the pretty thick plastic sheets or films.

Plastic Rotational Molding

It is a high-temperature, low-pressure plastic-forming process, for better understanding, image it as a rotate container, and the plastic be rotated to be the final item.

In this type of plastic molding, cycle time usually takes about 40-45 minutes. And the product could from kinds play equipment in park to floating bridge in sea.

Plastic Compression Molding

Compression molding just likes to put a slug of plastic in a heated mould and press it to form the final product. In this type of plastic molding, it uses vertical press.

As for the compression-molded items, it could be related with a variety of applications: Electrical, Mechanical, Transportation, Dishware,Sporting Goods