Special Applications Injection Molding

Special Applications

Liquid Silicone Rubber (LSR) components offer high thermal stability, o-zone and UV resistance, and long-term, non-aging mechanical properties in many challenging environmental conditions. Fully automated injection molding technology is ideal for tight tolerances, whether the part has simple, complex, or unique geometries.

For specific information regarding material and application alternatives, we recommend visiting our technical information page or contact us directly.

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Irrigation and Filtration Components


Irrigation components such as pressurized sprinkler nozzles require seals and pressure membranes that function properly and continuously without deterioration when exposed to all possible environmental conditions. LSR material, unlike many other rubbers, will not severely degrade over time – even when exposed to UV or highly variable temperatures. Similarly, filtration components and seals made out of LSR maintain their high resilience and low compression set, allowing for a very long part life.


Valve and Gauge, Membranes and Seal Rings

Minimizing assembly steps and errors is critical for high-precision gauges wherein the membrane tension directly controls gauge behavior. Even minimal errors in thickness distributions throughout the part or torsions during assembly can lead to incorrect gauge readings. With multi-component molding, precise tolerances and uniform thicknesses throughout the part are possible, thereby eliminating related assembly errors.


Seals, Gaskets and O-Rings

In most industrial applications, parts are subjected to harsh environmental conditions where the life time of a component may depend on its seal or gasket. Whether the reason for the seal is to provide water resistance, alignment, dampening, or to withstand high pressures, LSR will excel in maintaining the lifetime requirements of your equipment or parts. With fully automated injection molding processes, improved quality and tight tolerances are achieved, especially when compared to HCRs.Depending on the design of the part, LSR overmolding or LSR 2-Shot (LSR/Thermoplastic) injection molding can provide the precision and quality required while reducing assembly costs.


Low Pressure Exit, Check and One-Way Valves

With its superior flexibility, LSR allows for elongation with no permanent deformation. One-way valves, dual-valves, and exit nozzles are generally designed in such a way that they open when a certain amount of pressure is applied, and they revert to their original sealed position when the pressure is removed. LSR is an ideal material for these applications.


Lighted Panel Buttons

LSR overmolded onto a thermoplastic casing allows for perfectly transparent buttons and/or any degree of semi-transparency with an enormous range or color possibilities. The tactile feel and the amount of force required when pressing a button may be easily altered by modifying part geometries and/or by selecting alternative LSR materials. There is a vast range of LSR materials available, each with slightly different material characteristics, including look and feel.


Overmolded Parts

For complicated assemblies that require the use of a seal, gasket, or fragile rubber component, or for when part performance is critical and errors in assembly can’t be tolerated, LSR overmolding can provide a cost effective option that eliminates assembly challenges and errors. Huge reductions in assembly costs and improved part performance can be made possible with LSR overmolding. LSR can be chemically and mechanically bonded onto thermoplastics with no need for primers. Direct bonding to metals with an integrated adhesive and/or mechanical bonding is also possible, and it creates a strong, lasting bond.

Is Silicone Rubber Right for Your Application?

Silicone rubber is a highly dynamic material. Its durable characteristics and extreme versatility make it the ideal choice for a wide range of applications beyond those described on this page. Choose silicone rubber for your project if you need a material that can deliver superior resistance to extreme temperatures, high dielectric strength, and strong overall mechanical properties. Silicone rubber can also be sterilized for use in medical and food/beverage applications. For more information, keep browsing our website to check out other Markets pages, or contact our office directly.

Working With SIMTEC

SIMTEC is a leading manufacturer of custom liquid silicone parts. Offering unmatched expertise and production capabilities, we can quickly turn around high volume orders. We are a partner to demanding, forward-thinking customers in many industries, including automotive and medical device manufacturing, consumer products and more.

With one of the lowest defect rates in the industry, and a proactive approach to quality management that’s been certified to ISO 9001:2015, ISO 13485:2016/NS-EN ISO 123485:2016, and IATF 16949:2016 standards, there’s no better partner for any LSR manufacturing project than SIMTEC.
We’d be happy to discuss your specific requirements and explain in detail how we can help with your large quantity product needs. — call or email our office to speak with an engineer today.