application

The plastic extrusion process is a straightforward procedure that involves melting down resin beads (raw thermostat material), filtering it and then designing it into a given shape. The rotating screw helps in pushing down a heated barrel to a given temperature. The molten plastic is passed through a die to give the final product its shape or profile. Filtering provides the final product with uniform consistency. Here’s a quick breakdown of the entire process.

Step 1:

The process begins by introducing raw plastic products such as granules and pellets into a hopper and feeding into an extruder. Colorants or additives are added if the raw materials don’t have some. A revolving screw facilitates the movement of raw resin through the heated cylindrical chamber.

Step 2:

The hopper’s raw materials then flow through the feed throat to a sizeable spinning screw within a horizontal barrel.

Step 3:

Different materials have different properties, including melting temperatures. As the raw resin passes through the heated chamber, it’s heated to its specific melting temperatures, ranging from 400 to 530 degrees Fahrenheit. The resin is thoroughly mixed by the time it ­gets to the end of the screw.

Step 4:

Before the resin is passed through a die to create the end product’s shape, it passes through a screen reinforced by a breaker plate. The screen removes the contaminants or inconsistencies that may be in the melted plastic. The resin is now ready to die as it’s fed into the cavity for cooling and hardening. Water bath or cooling rolls can help in fastening the cooling process.

Step 5:

The plastic profile extrusion process should be in such a way that the resin flows smoothly and evenly in the numerous stages. The quality of the final product depends on the consistency of the entire process.

Raw Materials Used in Plastic Extrusion Process
Different plastic raw materials can be heated and created into a continuous profile. Companies use a wide range of raw materials, including polycarbonate, PVC, recycled materials, nylon and polypropylene (PP).