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Compression MoldingCompression molding involves taking a rubber compound or mixed raw material and creating "pre-forms" in the basic shape of the end product. These pre-forms provide a surplus of material to be placed in the cavity and ensuring a total cavity fill. Once in place, the mold is then closed, applying both heat and pressure to the pre-form and allowing it to fill the cavity. When the cavity is filled, excess pre-form material spills out into overflow grooves. Following this step the rubber is then demolded, usually by hand, leaving a finished molded rubber product.
Compression molding is often chosen for medium hardness compounds in low volume production or in applications requiring particularly expensive materials. This process helps to minimize the amount of overflow, or flash created during the rubber molding process. In creating compression molded rubber products, the pre-forms can be difficult to insert into more complex mold designs. Additionally, the compression molding process does not lend itself well to the material flow requirement of harder rubber compounds. Benefits of Compression Molding
Compression molding can be a cost effective solution in situations where:
Applications of compression molding range from simple belts to complex diaphragms with diameters of more than 10 inches. Rubber Industries can offer a variety of other molded rubber products through injection molding or transfer molding. |
Molding Simulations Injection Molding | Transfer Molding | Compression Molding |
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Rubber Industries, Inc. 200 Cavanaugh Drive | Shakopee, MN 55379 | Ph 952.445.1320 | Fax 952.445.7934 |
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