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LSR Workshop

Liquid Silicone Rubber Injection Molding

JESilicone has been producing precision LSR components using liquid injection molding for more than 20 years.

Our facility is equipped with state-of-the-art liquid injection molding (LIM) cells with inline vision technology, value-added operations stations and finely tuned quality systems – all of which ensure we deliver high-quality, high-volume LSR parts to our customers.

Customized Liquid Silicone Rubber Injection Molding Parts

JESilicone offers complete turnkey solutions for all business in need of high quality liquid silicone rubber injection molded parts (LSR molded parts) . The following are part of our successful customized Liquid Silicone Rubber Products.

How Does Liquid Silicone Rubber Molding Work?

First, a liquid silicone rubber molding tool is created using CNC machining. This tool must be a high-temperature tool in order to withstand the LSR injection molding process. The tool may then be polished to allow for different finish options.

Next, the finished tool is loaded into an LSR-specific injection molding press that is precision geared for accurate control of shot size to produce the most consistent LSR parts. Materials used include standard silicones and specific grades to fit different part applications. Because LSR is a thermosetting polymer, its molded state is permanent. Unlike thermoplastics, they can’t be melted again. Once the LSR injection mold parts are ready, they are removed from the mold and then put to use as prototypes or production parts.

Injection molded silicone rubber is a great solution for a variety of industries including medical, lighting, and automotive.

lsr workshop
LSR Injection Molding Workshop

Characteristics of LSR

Liquid silicone rubber is high-purity platinum cured silicone. LSR’s physical, chemical and thermal properties make it highly suitable for products where performance, durability and high quality are a necessity.


Liquid silicone rubber is odorless, does not have a taste and is Food and Drug Administration (FDA) compliant

Liquid silicone rubber does not react with alkali or acid chemical products and is also resistant to damage from water, oxidation, UV rays, ozone, and radiation

Inherently hypoallergenic and non-toxic, LSR will not cause irritation or allergic reactions with contact, even in those with sensitive skin

LSR parts will retain their shape when compressed

Provides great stability in extreme hot and cold temperatures from -40 degrees C to +250 degrees C

Additionally, liquid silicone rubber allows for coloring or transparency in the finished product. Depending on their chemical composition, these materials can also serve as insulators or conductors.

LSR liquid injection molding is the preferred method for molding precision, delicate components. The process is clean and offers precision, accuracy, and high output. When combining the properties of LSR with the clean manufacturing process of liquid injection molding, the result is products that offer superior resilience and performance.

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Thank you so much for considering JE Silicone, A Professional Silicone Rubber Products Company. We appreciate you putting your trust in our services!

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Please provide as many details about your project as possible to get the most accurate information on how we can best help you. And our engineer will get back to you in 1 hour.