Compression Moulding: A Brief Overview
Compression moulding is a manufacturing process that we don’t hear too often, but it is another option that you should consider. It’s another type of molding process where the heated mold is exposed to pressure. Just like other molding processes, you are placing a material like plastic or other polymers inside the mold cavity. Once it hardens, you can pull out the final product from this cavity.
What makes compression moulding different is from other manufacturing processes is it balances the use of pressure and heat. It’s these two forces that make a big difference in altering the properties of the molded product or parts.
How Compression Moulding Works
The process of compression moulding begins with heating the material and the cavity mold. When these two elements reach the desired temperature, the heated material is poured into the cavity to form the parts.
The application of heat alone is enough to mold the material to conform to the shape of the cavity. Still, when pressure is added into the equation, it is what makes compression moulding an effective manufacturing process.
When the material is poured into the mold, the plug seals the top of the mold tightly. With the added pressure, the material fills in all the empty spaces in the mold cavity. With force exerted on the cavity reaching to about 2000 psi, you can expect nothing less from the result.
After allowing the product to cool, it’s pulled out of the mold cavity. The method of using compression moulding may be a lot different, but it uses the same principle: using a heated plastic or polymer, pour it in the cavity, and apply some pressure.
Benefits of Using Compression Moulding
Compression Moulding is invented to make metal parts for replacements, mostly in automotive parts. It typically makes large, slightly curved, or metal parts. If you see car hoods, fenders, scoops, and other intricate car parts, they are all made from compression moulding.
One of the benefits of using this process is it creates strong and durable products. Compared with using plastic injection molding, the materials are physically more durable when heat and pressure are applied. In addition to making sturdy products, compression molding can also create parts with complex geometries. These shapes are not possible with other processes, but when a material is applied with pressure, it fills all the spaces of the mold cavity.
Compression moulding produces quality products with fewer knot lines too. For excellent compression moulding manufacturers, choose LT Century.