What Are Silicone Gaskets

Silicone gaskets are mechanical seals used to prevent leakage between two engaging surfaces. They are commonly used in industrial, automotive, and home applications. Silicone gaskets are made by molding or extruding silicone rubber into the desired specific shape or profile.
Molding involves heating the raw silicone material (usually in granular or liquid form) in a mold cavity to shape and cure it into the desired shape.

The process can be either compression molding or injection molding, depending on the size and complexity of the spacers required. Extrusion involves forcing silicone material through a mold or series of molds to shape and cure into the desired profile. Extrusion processes are suitable for creating complex shapes that would be difficult to achieve using traditional molding techniques. Once the silicone rubber has been formed or extruded, the gasket is usually trimmed to the desired size and shape using a lathe or cutter. Additional treatments, such as surface coatings or adhesives, can also be added to enhance the performance of silicone gaskets in different environments.

The Common Silicone Molding Ways of Silicone Gasket

Injection Molding

Silicone Injection Molding

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• Injection Molding

This process involves injecting liquid silicone rubber under high pressure into a predetermined mold. The mold is then heated to promote the curing of the silicone rubber. Silicone injection molding can produce a large number of high-precision gaskets in a relatively short time. However, this is a more expensive process due to the cost of equipment and tools.

• Compression Molding

Compression molding involves placing pre-cut silicone sheets into heated die cavities and compressing them under high pressure until the die is filled. The silicone is then cured by heat or a chemical reaction. Compression molding is an ideal process for the efficient production of small and medium-sized gaskets. However, it is not as effective as injection molding when producing large volumes of spacers.