Automotive Injection Molding

Automotive Solutions

Since our founding in 2001, SIMTEC Silicone Parts has been a key solutions provider to the leading Tier I and Tier II suppliers in the automotive industry. As a global renowned expert in Liquid Silicone Rubber (LSR) and LSR injection molding, automotive OEMs rely on SIMTECs expertise and experience. Specializing in high-volume, highly–automated production (starting at 500,000 units), we custom manufacture LSR single-shot and multi-shot gaskets, seals, bellows, boots, O-rings, valves, sensors, connectors, and other components made to our customers’ exact specifications, and to the high tolerances required for today’s performance cars and trucks.

Why LSR?

As compared to other processes and materials, Liquid Silicone Rubber (LSR) injection molding offers innumerable benefits for automotive parts and components that have high volume demands. LSR is an ideal raw material for rubber O-ring seals for automobiles and other parts due to its high thermal stability, superior durability and resistance to compression, tears and stress.

For a complete set of specifications, or for more information about the suitability of LSR for rubber grommets and other molded automotive parts, we recommend reviewing the technical information page or contacting us directly.

Read Our LSR In The Automotive Industry Guide

LSR Automotive Overmolding Process

Multi-Component Metal/Plastic to LSR
Liquid Silicone Rubber (LSR), 2-Shot (LSR/Thermoplastic) and LSR over-molding processes allow for the integration of multiple parts and materials into one component, thereby minimizing or eliminating additional assembly and quality assurance costs. With the LSR 2-Shot process, LSR is molded directly onto a thermoplastic component in the same mold that the plastic component was produced; primer is not required. In the case of the over-molding process, the substrate, whether it be metal or plastic, is placed in the LSR mold where it is then over-molded with LSR; depending on the materials involved pre-treatments may be required.

Harness Components
From ring seals, single-wire seals, and housing seals to individual inner grommets, these parts are vital to the proper functioning of any vehicle. By employing LSR 2-Shot (LSR/Thermoplastics) technology, the housing, grommet, and rubber ring seal can be manufactured in the same silicone injection molding unit thereby ensuring high-precision parts, while at the same time reducing assembly costs.
Automotive Rubber GrommetsSelf-Lubricating Components
Self-lubricating material is ideal for automotive grommets, single wire seals, and many other rubber seals and gaskets where lubricity is needed for ease of assembly. Self-lubricating LSR reduces stick and improves slippage for parts such as housing seals, rubber automotive O-rings, and other parts that are continually in motion.
Liquid Silicone Rubber for Automotive O RingsCustom O-Rings
These specialized, durable Liquid Silicone Rubber automotive O-rings are used in seat heaters for luxury vehicles. Liquid Silicone Rubber (LSR) injection molding is perfectly suited for high volume, high precision parts that must be durable, long lasting (for the lifetime of the vehicle) and resistant to high temperatures. This technology is also ideal for parts with unique geometries, whether simple or complex.
Liquid Silicone Rubber for Anti-Drain Backflow ValvesMembranes: Anti-Drain Backflow Valves
Even when exposed to oil and many other harsh chemicals, LSR’s mechanical properties will remain the same for the lifetime of the part. This makes silicone an excellent material option for rubber automotive back flow valves. With LSR injection molding technology, pressure actuated components such as back flow valves can be designed and consistently produced with uniform thickness throughout the part. Parts such as this can be integrated with other parts or components using LSR 2-Shot injection molding processes, thereby improving part function while reducing or eliminating assembly costs.
LSR for Automotive Lighted Panel ButtonsLighted Panel Buttons
LSR’s transparency, pliability and smooth feel are ideal for buttons that need to allow for the flow of light. With LSR 2-Shot (LSR/Thermoplastics) injection molding technology, we are able to design and produce a single component that incorporates both the transparent flexible buttons and the rigid plastic housing required to protect the electrical components.
LSR for Automotive Wiring HarnessWiring Harness Components
Rubber ring seals, single-wire seals, housing seals, individual inner grommets, etc. are all responsible for providing watertight seals that last for the lifetime of the vehicle. These parts must be able to withstand high temperatures without detriment to the part’s mechanical properties. Rubber automotive seal rings and automotive grommets can be produced using self-lubricating LSRs to allow for easy assembly. In some cases, LSR parts such as these can be overmolded directly onto other components within the assembly thereby creating a superior seal while eliminating assembly steps and time.
Liquid Silicone Rubber for Automotive Button CoversSoft-Touch Components
Any soft-touch button or component, such as lighted panel buttons, can be designed to feel as smooth as leather, or to provide a massaging sensation by adding tactile rib features or textured surfaces. With careful material selection, soft-touch silicone can be molded directly onto a plastic surface, creating a very strong chemical and mechanical bond.
LSR for Automotive Spark Plug BootSpark Plug Boots
High thermal stability and non-aging characteristics make LSR an ideal candidate for spark plug boots and many other “under-the-hood” applications.
LSR for Automotive Seals and GasketsGaskets
Automotive exterior components are constantly exposed to a vast range of temperatures. Due to LSR’s ability to maintain its mechanical properties when faced with extreme temperatures (with thermal stability from -50 degrees C to 250 degrees C), it is the ideal material for high temperature headlight and/or flexible spotlight automotive gaskets. Silicone rubber gaskets also offer superior elongation and tear resistance, as well as o-zone and UV resistance.
LSR for Automotive Resonance DampersDampers and Noise Reduction Folds
Fitted overmolded automotive parts such as air conditioner flaps reduce noise during the impact of plastic-to-plastic surfaces and provide better contact rubber seals. LSR is a good solution for many impact applications and resonance dampers.
LSR for Automotive DispensersBellows and Protective Caps
LSR’s extreme temperature resistance makes it ideal for any interior or exterior application. Whether it is a complex shaped component or a simple geometry part, any high-volume part can be manufactured using the LSR injection molding processes.
LSR for Automotive GasketsSeals and Gaskets
It is a good idea to consider silicone for seals or gaskets used in many engine or interior components. For high temperature conditions, or where exposure to radiation or heat may lead to rapid aging, LSR will outperform many of the alternative available materials. With the proper design, these automotive seals or gaskets can be incorporated into an LSR 2-Shot (LSR/Thermoplastics) multi-component part thereby reducing or eliminating all assembly costs.

Contact SIMTEC to Discuss Your Project Today

SIMTEC can quickly fulfill high-volume orders (500,000+ items) of custom silicone O-rings, gaskets, seals and other rubber injection molded automotive parts. Because we specialize exclusively in custom parts, you will get a product that is built to your exact requirements and meets our industry-leading standards for quality control. It also gives you more control over the supply chain, as you can specify everything from mold development to packaging and shipping options.

With sophisticated processes, exceptional quality, and design flexibility, there’s no better partner to manufacture your large quantity OEM auto parts order than SIMTEC. Contact a representative today to discuss your requirements in detail and to receive a free quote.