What is the difference between silicone compression molding and silicone injection molding?

Question: What is the difference between silicone compression molding and silicone injection molding?

Answer: In the compression molding process, the mixed silicone is filled into an open mold. For a core and cavity mold, the cavity side is usually filled with excess material. Once filled, the two halves are then uniformly compressed under hot platens. After a certain amount of curing time, the two halves are either manually or mechanically opened. The final part is removed after excess material is detached.

In the injection molding process, the A and B component materials are mixed from the mixing unit, and immediately travel through the cool barrel. The mixed material is then injected in a hot closed mold. After the curing and mold-open phase, the final part is removed from the mold.

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About Veasna

After interning for more than a year at Albright Technologies, Veasna gained experience in many aspects of silicone manufacturing including understanding of materials, mold making, and silicone molding. Veasna received a Bachelors of Science in Plastics Engineering from University of Massachusetts in Lowell in 2010, shortly after he accepted a full time position at Albright Technologies. In the spring of 2011, he received a Graduate Certificate in Plastics Design from UML. Veasna is mainly responsible for managing customer’s projects which begin from signed purchase orders to accepted and on-time part deliveries, he is also actively involved in research work on silicone bonding.