Key Operational Notes for Rubber Seal Extrusion Production Lines

In rubber product manufacturing, the performance of sealing strips is closely related to material quality and production process control. The extrusion production line plays an important role in shaping product consistency and dimensional stability. Proper process management can help improve overall product quality and production efficiency.

1. Raw Material Preparation

The performance of rubber sealing products is influenced by material consistency and formulation control. Compounding should be carried out in a controlled manner to help reduce issues such as impurities, air bubbles, or surface defects.

For thermoplastic materials such as TPE and PVC, appropriate drying conditions may be required to reduce the risk of moisture-related surface imperfections.

2. Extrusion Process Control

Process parameters such as extrusion temperature, screw speed, and die adjustment should be properly controlled to maintain stable production conditions.

Excessive temperature may lead to material degradation, while insufficient temperature may affect plasticization and flow behavior. Proper screw and die alignment helps support consistent profile formation and dimensional accuracy.

3. Sizing and Vulcanization

Cooling systems, including vacuum or water-based sizing methods, are used to help maintain dimensional stability during forming.

For materials such as EPDM and silicone, vulcanization processes (e.g., hot-air or microwave curing) should be controlled within suitable process ranges to help ensure consistent curing performance and product stability.

4. Surface and Functional Treatments

Depending on application requirements, sealing strips may undergo additional processing such as surface coating, flocking, or adhesive backing application.

Uniform application and proper bonding control are important to help reduce issues such as peeling, uneven coating, or surface wear during use.

5. Inspection and Quality Control

Quality control is typically implemented throughout multiple production stages. Key inspection items may include:

• Surface condition

• Dimensional accuracy

• Hardness

• Compression set

• Weather resistance performance

These inspections help support consistent product quality and compliance with customer specifications.

6. Post-Processing and Packaging

Finished sealing strips are cut to required lengths and processed to ensure clean edges and consistent appearance.

During coiling and packaging, care is taken to reduce deformation or bending stress. Packaging materials are generally selected to provide protection against moisture and light exposure, with batch information included for traceability.

7. Safety and Equipment Maintenance

Operators are expected to follow standard safety procedures during production to reduce operational risks associated with high-temperature or mechanical equipment.

Regular maintenance of extrusion and vulcanization equipment helps support stable long-term operation. Cleaning of screws and dies after production is commonly performed to help reduce material buildup and maintain process consistency.

Conclusion

With proper control of each production stage, extrusion manufacturing processes can help improve dimensional consistency, surface quality, and overall performance of rubber sealing strips. A stable production system also supports improved efficiency and more consistent product delivery to meet different application requirements.