The extrusion process is an important process in the production of silicone rubber. The silicone extrusion process, also known as extrusion process, is a process in which the rubber material is continuously made into various shapes of semi-finished products through the interaction between the extruder barrel wall and the screw. Extrusion can also be used for rubber material filtration, granulation, raw rubber molding, and linkage between upper and lower processes, such as supplementary mixing of lower sheets under the internal mixer, and glue supply to the rolling machine after hot mixing. Extrusion is widely used in the manufacturing of tread, inner tube, rubber tube, and various semi-finished products with complex or hollow or solid cross-sectional shapes.

Common problems with extrusion process:
1. Bubbles
High vulcanization temperature, insufficient extrusion pressure, and clogged filter screens can all lead to the appearance of bubbles
2. The surface of the product is dull and without any light marks
High filling compound leads to high frictional resistance, and reducing extrusion speed or removing filter screens is a more effective solution
3. Product deformation
Product deformation is a concern for silicone extrusion strips. Due to the fact that the mold compresses the product from the middle through a porous structure, if temperature, pressure, and extrusion speed are not strictly controlled, the deformation rate of the product will increase
4. Product surface embrittlement
The temperature of the hot air in the drying channel is too high or the product stays in the hot air for a long time