Compression Molding
Compression molded rubber is a manufacturing process used to produce rubber components by compressing rubber material into a mold under heat and pressure. This method is especially effective for producing durable, high-strength parts with simple to moderately complex designs.
How Compression Molding Works
1. Material Preparation:
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- A pre-measured amount of uncured rubber (in the form of a preform) is placed into the mold cavity.
- Preforms are often cut or shaped to fit the mold and minimize excess material.
2. Mold Closure:
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- The mold is closed, and hydraulic or mechanical pressure is applied to compress the rubber into the mold cavity.
3. Heating:
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- Heat is applied to the mold to cure (vulcanize) the rubber, transforming it into its final, durable state.
4. Cooling and Removal:
• Once cured, the mold is cooled, and the finished part is ejected.
5. Trimming:
• Any excess material (flash) is trimmed off, leaving a finished product.
Key Features of Compression Molding
• Cost-Effective Tooling: Molds are generally less expensive to produce compared to other rubber molding methods like injection molding.
• Material Flexibility: Suitable for a wide range of rubber materials, including natural rubber, silicone, EPDM, and neoprene.
• High Durability: Produces strong, long-lasting parts.
• Low Waste: Pre-measured preforms minimize material waste.
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