LSR Injection Molding

LSR(Liquid Silicone Rubber) Injection Molding


LSR injection molding is a process that can be used to create parts from liquid silicone rubber(LSR). In this process, liquid silicone rubber is injected into a mold to create the desired shape.The liquid silicone rubber is then cured using high

temperature curing process.


What is Liquid Silicone Rubber(LSR)

Liquid silicone rubber is a thermoset elastomer made from a two-part system consisting of an epoxy-based resin and a platinum-cured silicone. It can be injection molded, cast, or extruded into various shapes, making it ideal for a wide range of applications in the medical, aerospace, automotive, and consumer industries.


LSR has many properties that make it superior to other materials:

  • It is biocompatible and inert, making it ideal for medical applications.

  • It has low compression set and high tear strength.

  • It resists extreme temperatures (-60 to 300°C) and has excellent weather resistance.

  • It is electrically insulating and flame retardant.


Finally, LSR can be molded into very intricate shapes with tight tolerances.



LSR Injection Molding Process


LSR injection molding is a process that involves injecting liquid silicone rubber into a mold in order to create a part or product.

  1. The liquid silicone rubber is first mixed with additives in order to achieve the desired properties for the end product.

  2. Once the mixture is ready, it is injected into the mold under high pressure.

  3. The mixture then vulcanizes or cures inside the mold, and the final product is ejected.

  4. Finally, LSR can be molded into very intricate shapes with tight tolerances.


The History of LSR Injection Molding


The history of LSR injection molding can be traced back to the early days of plastic injection molding.


In the 1950s, plastics were first injected into metal molds to create various objects and products. This process was later adapted to create rubber products, including tires and other objects.


In the 1970s, LSR was developed as a new type of rubber that could be injected into metal molds. This allowed for the creation of more intricate rubber products, such as seals and gaskets.


Advantages over Traditional Injection Molding


Liquid silicone rubber(LSR) injection molding has many advantages over traditional injection molding. Some of these advantages include:

  1. Liquid silicone rubber(LSR) is a much more viscous material than traditional plastics, so it can be injected at much lower pressures. This results in less wear and tear on the injection molding equipment, as well as shorter cycle times.

  2. Do not require the use of high temperatures during processing, so there is less risk of thermal degradation of the material. This also means that smaller and more delicate parts can be molded with LSR without fear of damage.

  3. Excellent flow properties, so it can fill even the most intricate molds with ease. This results in parts with very tight tolerances and smooth surfaces.

  4. Liquid silicone rubber(LSR) is an extremely tough material, so parts made from it are very strong and resistant to impact and abrasion. In addition, LSR is virtually unaffected by most chemicals, making it ideal for use in harsh environments.


lsr injection molding


LSR Injection Mold Service


If you are in need of a high-quality, low-cost injection molded product, look no further than LSR Injection Mold Service. We are a leading provider of custom silicone rubber molding services, offering a wide range of options to meet your needs.


LSR Injection Mold Service offers a variety of benefits over traditional injection molding methods, including:


• Lower costs – LSR molds can be produced quickly and efficiently, resulting in lower overall costs.

• Greater flexibility – LSR allows for greater design flexibility, as it can be molded into complex shapes and sizes.

• Higher quality – LSR products are characterized by their superior strength and durability.


Finally, LSR can be molded into very intricate shapes with tight tolerances.

Whether you need a one-time project or ongoing production runs, our team is ready to meet your needs. Contact us today to learn more about our capabilities or Request a Quote for your next project!

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