+8615818122342 sales13@gdtym.com

How the Liquid Silicone Rubber (LSR) Injection Molding Process Works

Recent Posts

  • Meet TYM at K 2025 -The World’ s No.1 Trade Fair for Plastics and Rubber

    Welcome to the World’s No.1 Trade Fair for Plastics and Rubber -K 2025, taking place from October 8–15, 2025 at Messe Düsseldorf, Germany. As a professional LSR injection molding machine, mold, and robot solution provider, TYM Technology Co., Ltd. is proud to present our latest innovations at Booth 16E77.

    09/23/2025

  • ISO 9001, CE, CCC: What These Certifications Actually Mean for Your Equipment Purchase

    When you're evaluating LSR injection molding machines from an overseas supplier, certification logos on a company website can start to blur together. ISO 9001, CE, CCC — they all sound reassuring, but they don't all mean the same thing, and they don't all matter for the same reasons. Understanding what each certification actually covers will help you ask better questions during due diligence and avoid assuming a certificate guarantees something it doesn't.

    07/17/2026

  • Turnkey LSR Injection Molding Solutions

    Launching a liquid silicone rubber (LSR) injection molding operation involves far more than simply purchasing a machine. From material selection and mold design to automation integration and staff training, the journey from concept to full-scale production presents numerous challenges—each with the potential to delay your time-to-market and inflate your budget.

    07/14/2026

  • Industrial Silicone Seals & Waterproof Parts: LSR Guide

    This guide helps product and sourcing engineers who need reliable industrial sealing components-gaskets, O-rings, grommets, and enclosure seals-understand why LSR injection molding is the preferred process for waterproof parts at volume, and how to specify them.

    07/10/2026

  • LSR Prototype to Production: Timeline & Process

    A typical liquid silicone rubber (LSR) part moves from prototype to mass production in about 10-18 weeks, spanning design/DFM, prototyping, production mold fabrication, T1 sampling and validation, and pilot-to-ramp - with mold build and validation being the longest stages.

    07/07/2026

  • LSR Injection Molding Machine Parameters Explained

    An LSR injection molding machine spec sheet lists dozens of numbers, but only a handful decide whether your silicone parts cure fully, stay flash-free and cost little to run. This 2026 guide explains the parameters that matter most, so engineers and buyers can compare machines on the specs that actually affect part quality, not marketing figures.

    07/02/2026

  • Automatic vs Semi-Automatic Silicone Molding Lines

    This guide is for production and procurement decision-makers sizing a new LSR line—comparing the two configurations across throughput, quality, cost, and payback so you can match the investment to real demand.

    07/01/2026

  • LSR Cold Runner Systems: Cut Waste & Cost

    LSR cold runner system is the single fastest way to cut material waste and labor out of liquid silicone rubber molding. By keeping the silicone liquid until it reaches the cavity, it eliminates cured runners and trimming entirely. This guide helps process engineers and buyers decide when a cold runner pays for itself.

    06/30/2026

  • How to Select LSR Injection Molding Machine Tonnage

    Choosing the right clamping force is the single most consequential spec decision when buying a liquid silicone rubber (LSR) injection molding machine. Pick too little and you fight flash on every shot; pick too much and you pay for energy and floor space you never use.

    06/29/2026

  • Liquid Silicone Rubber Market 2026: Size, Growth & Demand Drivers

    The global liquid silicone rubber (LSR) market is valued at roughly USD 3.4-3.8 billion in 2026 and growing about 7-9% annually, led by medical-grade demand (~44% of revenue) and rising EV production. Asia-Pacific dominates manufacturing capacity.

    06/26/2026

How the Liquid Silicone Rubber (LSR) Injection Molding Process Works

06/17/2020

We know that LSR material has lots of outstanding features in components making and it also have lots application in many industrial use.Today we keep on learning how the LSR injection molding process works.

As we all know, Liquid silicone rubber (LSR) injection molding is an industrial fabrication process that molds materials into a broad range of components and products. It relies on pressurized impingement mixing, that unlike the standard reaction injection molding process. LSR injection molding uses a mechanical mixing process that focuses mainly on liquid silicone rubber (LSR) and similar elastomeric materials.

How the liquid silicone rubber injection molding works ?

We usually utilizing a pump the LSR injection molding method brings together an apportioned mixing and dispensing of LSR. One plunger holds the base forming plastic, that helps strengthened with additives and fibers, and the other plunger contains the catalyst. Each will be pumped in a 1:1 ratio into a static mixer, which triggers the mixing reaction.

The liquid mixture is then injected into a sealed mold where it is heated at temperatures from 180 to 200 C, or 355 to 390 F. It starts out as a fluid and is then heated within the mold to initiate curing. Once it hardens, the molding machine ejects the nearly finished part.

Thermoplastics operate in reverse; the materials are heated in the injection barrel to their melting point and then cooled in the mold. Many manufacturers use computer-aided design (CAD) tools to make the LSR process more efficient. CAD allows them to run simulations to determine the most cost-efficient and effective processing regiment and conditions, evaluate results, and check integrated components.

In addition, thermal imaging technology can help pinpoint costly production mistakes, especially molding defects and design irregularities.

In next part, we will learn some new information about the LSR injection molding machine and some moulds. Also , do not hesitate to mail us your idear about the liquid silicone injection molding.