Silicone Rubber Injection Molding (a to z)

Silicone Rubber Injection Molding (a to z)

Table of Contents

In this comprehensive article, we will discuss everything you need to know about liquid silicone rubber molding.

It covers the basics of the production process, as well as more advanced concepts. By the end of this article, you will get a better understanding of what is liquid injection molding technology.

Let’s get started!

White Liquid Silicone Rubber in the metal bucket

Silicone rubber liquid injection molding is a process used to produce parts from silicone elastomers. 

Silicone elastomers are materials that have properties similar to rubber, but with superior thermal and electrical insulation.

Liquid Silicone Injection Production Lines in Tech-Link Vietnam Factory

What is silicone rubber injection molding?

Liquid silicone rubber injection is a process in which liquid silicone rubber is injected into a custom-made mold to create lsr parts with specific shapes and sizes.

Tech-Link Liquid Silicone Molding Lines in Vietnam Factory

This process requires precision and accuracy, as the liquid silicone must be injected quickly and evenly in order to form a part that meets the desired specifications.

Which silicone components are manufactured by silicone rubber injection compression molding?

Silicone rubber molding is used for the production of a wide range of products, including gaskets and seals, valves and other molded components.

Oil Seals

Silicone Gaskets

Silicone Plugs

Besides, lsr materials are also good to manufacture electrical insulation, thermal insulation and vibration-dampening materials.

Lsr silicones can also be used to make medical devices or consumer products like cell phone cases.

Why use lsr silicone rubber molding technology?

Liquid silicone rubber molding allows for intricate custom designs and complex shapes to be created in a single operation.

And liquid silicone rubber molding offers excellent durability, chemical and temperature resistance, as well as flexibility for a variety of applications.

That is to say, LSR injection molding service is an ideal option for many industries that require precision molded lsr parts with tight tolerances.

The process is well suited to fast mass-volume production and offers excellent product quality and dimensional accuracy.

Precise Tooling Method at Low Cost

Moreover, Liquid silicone injection molding is a reliable, cost-effective and efficient tooling method for producing precision components with intricate geometries in high volumes compared to other manufacturing methods.

Why silicone rubber is good for liquid injection molding?

Liquid Silicone rubber LSR offers excellent resistance to high temperatures, which makes it ideal for quality custom lsr parts that encounter extreme heat or cold.

And Lsr materials also have good electrical insulation properties and are often used in the production of medical devices, as well as high durability and chemical resistance, making it an ideal choice for a wide range of industries.

Silicone Rubber Properties Testing

What types of rubber can be injection Moulded?

Liquid silicone elastomers are the most common material used in injection molding, due to their properties such as a wide hardness range, excellent flexibility, and superior thermal and electrical insulation.

Other types of elastomers that can be injection molded include natural rubber, urethane rubber, nitrile rubber, EPDM rubber, fluoroelastomers and neoprene rubber.

Liquid Silicone Rubber Made by Tech-Link

What are the production processes of lsr injection molding?

The molding process begins by preheating the two halves of the mold to the correct temperature before injecting them with liquid silicone rubber injected at high pressure into the mold cavity.

Once filled, the material then cools for a period of time before the mold is opened.

Heating & Injection

Finished lsr molded parts are then ejected from the cavity and collected for further processing, including trimming, post-curing, painting, or assembly into final products.

In this lsr injection molding process, the lsr material is heated to create a liquid state and then injected into a pre-shaped mold. 

The injection pressure of the mold is then used to shape the part and make sure that it cools correctly. The end result is a precise, detailed replica of the original design.

Compression Moulding

LSR Molding molding offers a cost-effective way to produce highly accurate molded parts with excellent heat, electrical, and chemical resistance in large volumes. 

It also provides great flexibility for creating intricate shapes and can be used with a wide range of materials.

Silicone Injection Molding Methods

The process of lsr injection molding begins with the creation of a mold, which is a tool used to shape and form the product. 

This can be done using a variety of methods, such as 3D printing, machining or casting. Once the mold is ready, liquid silicone rubber is injected into it under pressure.

Which industries could leverage liquid silicone injection molding?

Silicone injection molding is used in various industries, such as automotive, medical, consumer electronics, aerospace, food processing and much more due to its high durability and chemical resistance.

Silicone components for Electronics

Silicone components for Automobile

Silicone components for medical use

What are the benefits & advantages of liquid silicone rubber lsr injection molding technology?

Silicone is a highly durable and versatile material that can be molded into intricate shapes, making it an ideal choice for a wide range of quality products.

Tailor-made Shape with high precision

Injection moulding helps to create quality parts with tight tolerances and superior surface finishes, ensuring consistency.

Medical grade silicones are often used for creating components that are exposed to harsh environments, such as extreme temperatures and chemicals.

Works for a Variety of Industries

Liquid rubber injection moulding allows for the creation of parts that meet specific dimensional specifications and have excellent thermal, electrical, and chemical resistance. 

This makes Silicone Liquid injection moulding an ideal choice for a variety of industries.

Injection moulding silicone rubber offers several advantages over traditional manufacturing production processes.

Heat Resistance & Chemical Stability

Additionally, silicone is extremely resistant to heat, cold and chemicals, making them a top choice for products exposed to harsh conditions. 

Silicone Rubber injection molding results in lightweight yet strong parts which can be produced in large volumes with minimal waste.

Injection-molded silicone Rubber parts also have excellent dimensional stability and good electrical properties. This makes them suitable for a range of electrical components and devices.

Silicone rubber injection molded products are extremely durable, ensuring they are long-lasting and reliable. 

For these reasons, Silicone Rubber injection moulding is an ideal option for a variety of industries.


Overall, Silicone rubber lsr molding is an efficient and cost-effective process for producing highly precise parts with superior properties. 

Additionally, Silicone Rubber is an environmentally friendly material, making it a great choice for green applications.

To sum up, liquid silicone rubber injection offers excellent flexibility and strength with minimal waste and cost, reliable performance and cost-effective production for a variety of components.

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