Rubber compression molding

large seriesISO 9001ISO 13485

Rubber is indispensable in modern industry, but in its raw state—whether natural or synthetic—it is soft, sticky, and unstable. To transform it into the durable, high-performance material we rely on, it must undergo vulcanization. This process changes rubber’s molecular structure from weak, linear chains into a strong, three-dimensional network, giving it superior elasticity, strength, and resistance to wear, temperature extremes, and chemical corrosion. What is Rubber Vulcanization? Rubber vulcanization is a chemical cross-linking reaction carried out under controlled temperature and pressure. Before vulcanization: Raw rubber behaves like loose strands of spaghetti—weak, sticky, and permanently deformed when stretched. During vulcanization: Curing agents (such as sulfur) and accelerators form “bridges” between polymer chains when heated. After vulcanization: The rubber becomes a resilient 3D network—like a fishing net—that stretches under force and snaps back to its original shape, creating the elasticity we depend on. Common Rubber Vulcanization Methods Compression Molding – Rubber blanks are placed in heated molds and pressed. Ideal for O-rings, seals, and gaskets. Transfer Molding – Rubber is pre-heated and then transferred into the mold cavity. Suitable for complex shapes. Injection Molding – Rubber is injected directly into molds, offering the most efficient solution for high-volume, high-precision components.