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- Material Preprocessing
- Raw materials (e.g., silicone rubber or EPDM) are vulcanized into pre-molded elastic components using high-temperature curing5.
- Tubular or branched structures (e.g., stress cones, shielding layers) are formed via specialized molds1.
- Pre-Expansion and Core Insertion
- Pre-Expansion: The pre-molded component is mounted onto an expansion rod (metal-based). Mechanical or pneumatic force radially expands the component to a preset size (e.g., 3× original diameter)52.
- Spiral Core Embedding: A removable plastic spiral core (e.g., polypropylene) is inserted to maintain the expanded shape until installation14.
- Automated Expansion Process
- Gripper Mechanism: Robotic arms transfer the expansion rod with the component to a clamping chamber for alignment23.
- Pulling Mechanism: Hydraulic or motor-driven rods pull the expansion rod through the component, achieving uniform expansion without surface abrasion26.
- Quality Control: Real-time monitoring of pressure (0.5-2 MPa) and temperature (ambient or cryogenic) ensures stable elastic memory properties54.
- Post-Processing and Packaging
- The expansion rod is removed, and the inner surface smoothness/dimensional accuracy is inspected.
- Components are packaged with dust-proof sealing and labeled with expiration dates (typically 1-2 years)4.
Production Process of Bag Expansion Machine for Cold-Shrink Cable Accessories
2025-03-03
