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Rubber Extrusion Process And Application

Rubber extrusion is the process of turning rubber material into a specific shape product. To provide this shape, manufacturers use rubber extruders.

A rubber extruder has two main parts: a heated shear screw conveyor and a die.

While the raw rubber material is heated in the conveying channel, it is processed by the screw that pushes the raw material. From the hopper (the container above the conveyor belt), the raw material is sent to the conveyor belt, where it is softened by heat and shear, and pressurized by the rotation process of the screw. The pressurized material is pushed into a die (located at the end of the extruder), and as it emerges, it acquires its shape.

Rubber extrusion profiles may vary by application. They are commonly used in industrial applications where sealing is required. While many other profiles can be made, there are also profiles that are readily available in the market.

1. Door Seal Profile

Also known as extruded top and side seals, these profiles are designed to fill the gap between the door and the door frame to prevent wind and water from entering the vehicle or building.

Door seals are usually rectangular. They are used in cars and trucks, as well as in many commercial and industrial installations. Door seals such as hatch seals can also be found in fuel tanks, rooftop HVAC systems, and electronics enclosures.

2. PVC Edge Trim Profile

PVC edge trim profiles are used to cover rough edges made of plastic and steel. These types of rubber extruded profiles are made from flexible PVC and have a gripping tongue that provides a firmer grip.

PVC edge molding profiles are commonly used in the automotive and marine industries for applications such as decorative moldings for ships, cars, and buildings.

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