As detailed in Engineering Product Design’s article, “Compression Moulding,” this manufacturing process involves placing material directly into a heated mold cavity, where it is then shaped under high pressure and temperature. Originally developed in the early 20th century, compression moulding has become essential for industries like automotive, aerospace, and construction due to its ability to produce high-strength and intricately shaped components.
Compression moulding works with materials in various forms—powder, resin, or pre-shaped volume—that are placed into a heated mold, often alongside fillers to enhance durability. The mold is closed, applying pressure and heat, which allows the material to flow and fully occupy the cavity. Once cured and cooled, the part takes the mold’s shape and is ejected, ready for use.
This technique has several applications, from creating resilient phone cases to components in vehicles and aircraft. The process can vary depending on the specific type of compression moulding:
- Flash Type: Used for shallow parts like dashboards, excess material (flash) is squeezed out and trimmed off.
- Positive Type: Ideal for high-density parts, precisely filled to minimize waste.
- Semi-Positive Type: Combines benefits of both Flash and Positive types, allowing versatility.
Compression moulding’s rich history includes milestones such as the introduction of thermosetting resins in the 1950s and fiber-reinforced composites in the 1970s, expanding its capabilities for stronger, lighter components.
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Article with all rights reserved, courtesy of engineeringproductdesign.com
