What is Extrusion Molding?

Extrusion molding is used to form plastic or metal materials into a pre-defined shape. During the process, the material is melted and pushed through an extrusion molding machine, forming a long, tube-like shape or rod. This is cooled and cut to the required length. Often, extrusion molding plastic products created in this way are used for wiring or insulating applications.
The products' cross-sections show uniformity throughout the length of the tubing, which is highly prized for numerous projects. Extrude plastics can also be formed into other tubular products, such as drinking straws. The plastic can also be shaped into thin sheeting or films by being flattened out by a set of cooling rolls.

Extrusion Molding Materials

There are several plastic polymers and products that can be used in the extrusion molding process. These include, but are not limited to the following:

• Acetal
• Acrylic
• Acrylonitrile butadiene styrene (ABS)
• Nylon (polyamides)
• Polycarbonate (PC)
• Polyethylene (PE)
• Polypropylene (PP)
• Polystyrene
• Polyvinyl chloride (PVC)

What are the Advantages of Using Extrusion Molding?

Extrusion molding provides the following advantages:

• Continuous process can produce lengths of up to 60 feet;
• Consistent cross-section results in the production of complex shapes;
• High production volumes;
• Low cost per pound of materials used;
• Good for producing tube-shaped products such as pipes and hoses.

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