How to Select the BEISU Extruder for Sealing Strip Production？

 How to Select the BEISU Extruder for Sealing Strip Production

First, Select the Screw Type: Matching Raw Material Characteristics

The mainstream raw materials for sealing strips fall into three categories, each corresponding to a specific screw configuration:

**EPDM and Silicone Rubber:** Best suited for *vacuum-vented, cold-feed single-screw extruders*. These machines can directly process room-temperature rubber compounds—eliminating the need for a preheating step—and produce bubble-free products, making them ideally suited for the processing requirements of rubber-based sealing strips.

**PVC, PP, PE, and Other General-Purpose Plastics:** Best suited for *standard single-screw extruders*. For small cross-section profiles, a smaller single-screw extruder helps avoid waste of resources and energy while fully meeting the extrusion molding requirements for plastic-based sealing strips.

**High-Filler Formulations, Modified Plastics, or Wood-Plastic Composites:** Best suited for *conical twin-screw extruders*. These machines offer superior plasticizing and compounding capabilities, possess excellent self-cleaning properties, can boost output capacity by approximately 20%, and are well-adapted for processing recycled materials and high-filler compounds.

Determine Core Parameters: Matching Product Specifications

For single-screw extruders (the most commonly used machine type for sealing strip production), the focus lies on determining two core parameters:

*   **Screw Diameter:** Determined by two factors—the larger the cross-sectional dimensions of the sealing strip and the higher the required output volume, the larger the necessary screw diameter. Standard screw diameter series include 20, 30, 45, 65, 90, 120, and 150 mm. For small-specification door and window sealing strips, a diameter of 45–65 mm is sufficient; for large-scale automotive sealing strips, 90–120 mm is recommended.

*   **Screw Structural Parameters:**

*   **Compression Ratio:** For high-filler formulations, select a higher value within the 4.5 range; for general-purpose formulations, a standard value is sufficient.

*   **Thread Flight Angle (Helix Angle):** For rubber processing, select a larger flight angle (helix angle) of 20° or more; for general-purpose plastics, the standard 17° angle is appropriate.

*   **Temperature Control Zones:** Processing rubber sealing strips requires a minimum of 8 temperature control zones; for plastic sealing strips, a basic configuration of 6 zones is sufficient. III. Matching Production Requirements: Enhancing Efficiency and Controlling Costs

**Automation and Precision Requirements:** For sealing strips requiring dimensional stability, prioritize machine models equipped with servo motors and intelligent temperature control systems. These systems allow cross-sectional dimension tolerances to be maintained within ±0.1 mm, thereby reducing rework rates. Furthermore, servo motors consume approximately 20% less energy compared to standard motors.

**Flexible Production for Multiple Variants:** For operations requiring frequent changes in product specifications, prioritize models that support rapid mold changes and can seamlessly switch between different thickness specifications. The goal is to keep changeover times within 30 minutes, thereby facilitating the efficient fulfillment of high-mix, low-volume orders.

**Reliability and After-Sales Support:** Prioritize machine models featuring screw and barrel components made from high-performance alloy steel, which offers superior resistance to wear and corrosion. Additionally, prioritize manufacturers with a comprehensive after-sales service network to prevent equipment malfunctions from disrupting continuous production.


📈 Get a Quote & Material Testing: +86-13913294389;+86-13962207872 📧 Email: batista@beisu-extrusion.com; maria@beisu-extrusion.com 📱 WhatsApp/WeChat: +86-13913294389;+86-13962207872 🌐 Website: www.beisumachine.com / www.beisu-extrusion.com 📍 Zhangjiagang BEISU Machinery Co., Ltd. (China Manufacturer)


#sealingstripmachine #pvcextrusionline #gasketmakingmachine  #plasticprofileextruder  #weatherstripmachine

#refrigeratorgasketline #pvcextruder #profilesmanufacturing

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