The silicone rubber extrusion process may encounter various common problems in actual production. The following are some possible problems and solutions:

Uneven extrusion: During the extrusion process, silicone rubber may experience uneven extrusion or inconsistent extrusion speed, resulting in unqualified finished products.

Solution: Check the adjustment parameters of the extruder to ensure that the extrusion speed, temperature, and pressure are adjusted appropriately. You can also inspect components such as the mold head, extrusion port, and mold to ensure they are clean and free from blockages.
Bubbles and pores: During the extrusion process, bubbles and pores may appear in silicone rubber, affecting the appearance and performance of the product.

Solution: Ensure that there is no gas residue at the feed port of the extruder, and adjust the extrusion parameters to reduce gas adsorption. Silicon rubber can be degassed before extrusion to avoid gas generation during the extrusion process.

Size deviation: The finished product size may not meet the design requirements.

Solution: Check if the extrusion speed and mold design of the extruder are suitable. Adjust the extrusion speed and mold design to ensure uniform extrusion and meet dimensional requirements.

Surface defects: There may be scratches, dents, and other defects on the surface of the finished product.

Solution: Check the surface quality of the mold and the status of the extruder. Ensure that the surface of the mold is smooth and free of scratches, and the temperature and pressure of the extruder are stable to reduce surface defects.

Poor flow: Silicone rubber may experience problems such as poor flow and blockage during the extrusion process.

Solution: Clean the feeding system of the extruder to ensure that the feeding port is unobstructed. Check the viscosity and flowability of silicone rubber, adjust extrusion parameters to adapt to its characteristics.

Mold wear: Extrusion molds may experience wear due to prolonged use, affecting product quality.

Solution: Regularly check the wear of the molds and replace severely worn molds in a timely manner. Ensure that the mold is well maintained to ensure the quality of the extruded product.

Temperature control issue: During the extrusion process, unstable temperature control may affect the extrusion performance of silicone rubber.
Solution: Ensure that the temperature control system of the extruder works properly and avoid excessive temperature fluctuations. Adjust the extrusion temperature according to the characteristics of silicone rubber to maintain stable extrusion performance.

To solve these problems, multiple factors such as extruder, silicone rubber material, and mold design need to be comprehensively considered. When encountering problems, methods such as adjusting parameters, optimizing processes, and regularly maintaining equipment can be used to solve them. If needed, you can seek advice and assistance from rubber material engineers or extrusion process experts.