The cycle time is generally longer than that of injection moulding because the process relies on curing rather than rapid cooling. Common materials include phenolic resins, which offer excellent thermal resistance, and epoxy resins, known for their superior mechanical strength.
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This technique is distinct from injection moulding because the material is not melted in a separate barrel before being injected. The selection of a compound dictates the required temperature, pressure, and cycle time, making it a critical variable in the engineering phase.
Advantages Over Competing Technologies One of the primary advantages of this moulding technique is its ability to produce large, thick-walled parts without the warpage often associated with injection moulding. The upper half of the mould, known as the male, descends to meet the lower half, the female, squeezing the material into every corner.
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Thermosetting polymers are the primary candidates for this method, as they undergo irreversible curing. Furthermore, it generates minimal waste since the flash—the excess material that escapes the cavity—is usually recyclable back into the granulate form.
More About Plastic compression moulding
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