A manufacturing process that melts and forms raw plastic material into a continuous profile

Step 1: Transform the plastic memory

Plastic Extrusion starts off with resin or nurdles being fed from a hopper into a barrel. The material is heated and rotated in the barrel, while a screw pushes the melted plastic through a screen plate, which helps to remove any contaminates and help transform the plastic memory from rotational to longitudinal. The process is similar to Injection Moulding – what changes is that it is continuous.

Step 2: Form the plastic

Once the plastic has been fed through the screens, it is fed through the die. The die is what gives the product its profile and this changes, depending on the final product requirement.

Step 3: Cool the plastic

After the product has been extruded, it needs to be cooled. Typically, cooling baths are used, where the plastic is pulled through water. In the case of sheet extrusion, the process requires cooling rolls. The Plastic Extrusion method changes depending on the process needed for the final product.
Blown film extrusion: shopping bags, black bags
Sheet/film extrusion: vacuum forming, roofing
Tubing extrusion: pipes, automobile
Over jacketing extrusion: insulating wires
Coextrusion: multiple layers, multiple materials used in any of the above methods.
Extrusion coating: Adding an extra layer to a final product, water-resistant paper.
At Maritime Marketing, we offer a range of different extrusion machinery from our partner brands, Liansu and BG Plast. We furthermore provide you with after sales support, parts and spares, as well as an experienced technical team to assist you with any requirements you may have.
Contact us today for a quote or more information about our plastics machinery.


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