Xiamen Better Silicone Rubber Co., Ltd

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We make liquid injection molding and manufacture different kinds of liquid silicone rubber molded parts for medical device, sanitary & bathroom products, electrical products, cosmetics, automotive and machines parts etc. Our team also can offer LSR products parts moldabilities & over-molded manufacturabilities analysis or design support etc.

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E-mail : admin@better-silicone.com
Add: No. 165th, Tong'an Park, Industry Zone, Tona'An District, Xiamen City, China
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Silicone Overmolding

Silicone Overmolding also known as Silicone Overmolding Medical, in-mold assembly, LSR Overmolding, Liquid Silicone Overmolding, Rubber Overmolding, Overmolding Silicone Onto Silicone, which is an injection molding process that molds silicone over, under, or through a substrate material (silicone, plastic, metal, glass and so on), and which combines the best of two materials to complete the final part. LSR Overmolding is widely used in healthcare, infant care, high precision sealing gasket, automotive and medical industries.

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Silicone Overmolding


Silicone Overmolding also known as Silicone Overmolding Medical, in-mold assembly, LSR Overmolding, Liquid Silicone Overmolding, Rubber Overmolding, Overmolding Silicone Onto Silicone, which is an injection molding process that molds silicone over, under, or through a substrate material (silicone, plastic, metal, glass and so on), and which combines the best of two materials to complete the final part. LSR Overmolding is widely used in healthcare, infant care, high precision sealing gasket, automotive and medical industries.

silicone rubber overmolding


There are two ways to achieve Silicone overmolding: multi-shot molding or insert molding. With double-shot molding, the first material shot is the substrate and the second is the overmold. A press with multiple barrels shoots two different resins into the same injection molding tool. The entire operation uses one machine in a continuous process, but double-shot molding is better-suited for larger volumes since the molds and machinery are more expensive.

two shot injection mold

What is Insert molding?  Usually will place the substrate (metal, plastic, glass and so on) into the mold and then overmolding some or all of the part. In order to achieve optimum bond strength, we will preheat the insert part to make its surface temperature closer to the melt temperature of the overmold. And we will also add a coating on the surface of the insert part to make sure silicone will overmold well. Across lower volumes, insert molding is more cost-effective than double-shot molding; however, insert molding requires a tool for the substrate and a different core and cavity to create the volume for the overmolded material.


liquid silicone rubber overmolding

Liquid Silicone Overmolding's Advantages:


Saving tiem and cost—By silicone overmolding, silicone directly onto a metal or plastic substrate, we can save the manually assemble cost and time. Silicone Rubber Overmolding can dramatically reduce your manufacturing costs and turnaround time, allowing you to get your product to market more economically.

Silicone Plastic Overmolding Mask

Suitable for Complicated Design Structure——Liquid Silicone/thermoplastic injection molding can meeet the complex design requirements of the automotive and medical industries. Silicone rubber overmolding produces parts that are waterproof, airtight, and more resistant to shock and vibrations.


Good Quality control——LSR/plastic injection overmolding process can meet high tolerance and pass strict quality control, making it suitable for use in any application where precision is required.




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Moldability & Manufacturability Analysis
Designs Support and Improvement
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No matter Low-volume or Mass Production
One Stop Service: Silicone, Rubber, Liquid Silicone, Plastic and Assembly

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