How Are Custom Molded Seals Made?

There are three main means of producing custom molded seals:

Injection molding

Injection molding is the most cost-effective production method for custom seals as it is excellent for producing small products with tight tolerances and little to no finishing requirements in high volumes. The process involves heating the molding material and injecting it into a mold. As pressure, temperature, and speed conditions are highly controlled, manufacturers can achieve extremely precise production operations.

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Compression molding

In contrast to injection molding, compression molding is better suited for the production of large parts that do not require tight tolerances or perfect finishes in small to medium production volumes. The process involves preheating the molding material and inserting it into a compression mold. Some of the advantages of this method include fewer knit lines, faster production, lower tooling costs, and better accommodation of high durometer materials.

Transfer molding

Similar to compression molding, transfer molding utilizes presses and molds. The main difference is that it uses a piston mechanism to force the molding material into an enclosed—rather than an open—mold. This method is suitable for producing larger parts or highly complex parts with tight tolerances in high production volumes. Its primary disadvantage is its high production costs.Various rubber products and sealing products at the exhibition stand.

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Post time: Apr-28-2022