How to Use a Compression Mould

The Compression Mould is a type of moulding process that uses high pressure to shape a polymer. It is usually used for thermosetting polymers, but some composites and elastomers can also be moulded using this process. Compression moulding has a single-plane mold. Parts are typically small, with a section thickness of 0.8mm to 13mm. Compression moulding can also incorporate features such as ribs and holes.
One type of surface treatment for a compression mould is chromium plating, which can retain a metallic luster for an extended period. It also has excellent heat and wear resistance, and does not change appearance even at 500°F. A further surface treatment for compression moulds is nitriding, which significantly increases wear resistance. The Compression Mould should be made from a high-grade steel, preferably a carbon alloy, to ensure maximum durability.
A compression mould's bulk factor is determined by the material it's made of. Generally, materials with high bulk factors will require an extra-high loading chamber. For such cases, a moulding extension is fixed to the mould's body. This type of moulding process also has a high bulk factor, which is a ratio of the volume of plastic powder to the volume of the part being made. Different fillers have different bulk factors, but for general-purpose materials, the bulk factor is two to three.
A second type of compression mold is one that heats the foamed material. This type of mold is commonly used for foamed materials and can also be used for materials that are not foamed. A heated compression mold is similar to a conventional compression mould, with one exception. A heating unit is necessary for this process. It also helps increase the quality of the finished product. So, if you want to learn more about how to use a Compression Mould, read on!

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