Xiamen Better Silicone Rubber Co., Ltd

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We make liquid injection molding and manufacture different kinds of liquid silicone rubber molded parts for medical device, sanitary & bathroom products, electrical products, cosmetics, automotive and machines parts etc. Our team also can offer LSR products parts moldabilities & over-molded manufacturabilities analysis or design support etc.

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E-mail : admin@better-silicone.com
Add: No. 165th, Tong'an Park, Industry Zone, Tona'An District, Xiamen City, China
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Liquid Silicone Mold

Liquid Silicone Mold & Liquid Silicon Mould, known as LIM or Liquid Injection Molding, RTV Liquid Silicon Mold etc. However, liquid silicone have many molded ways: liquid injection mold, compression mold and transfer injection molding etc. Following is many talking about liquid silicone molded by silicone injection molding machines and compression molded machines.

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Liquid Silicone Mold

Liquid Silicone Mold & Liquid Silicon Mould, known as LIM or Liquid Injection Molding, RTV Liquid Silicon Mold etc. However, liquid silicone have many molded ways: liquid injection mold, compression mold and transfer injection molding etc. Following is many talking about liquid silicone molded by silicone injection molding machines and compression molded machines.

Liquid Silicone Mold for LSR Silicon Seal Gasket

Liquid Silicone Mold by Injection Molded

Liquid silicone injection molds all need (water) cold runner systems, some need nozzle shut-off valves, some needn't shut-off & needle valves, which depends on liquid silicone rubber products designs, quality requirements and quantity demands etc.


Liquid Silicon Injection Mold with Shut-off Valves

Advantage of Liquid Silicone Injection Mold with Shut-off Valves

  • It can produce less 3mil (76.2 micron) or less 1 mil silicone rubber flashing & flash, some can up to no flash.

  • Liquid silicone injection molded product's sizes and designs tolerances is good and stable.

  • High yield liquid silicon injection molded products, low defect. Suit to LSR & liquid silicone mass production

  • Easily to implement liquid silicon & lsr automated production

Disadvantage of LSR silicone injection mold with shut-off valves 

Shut-off valve is one kinds of mold standard parts, which is very expensive. Only one shut-off valve cost is no less 500 or 800 hundreds dollars, some above one or two thousands dollars. If liquid silicone molded product want to achieve no silicone rubber flash, each mold cavity & chamber need one shut-off valves.That's why many customers would receive big price difference quotation for liquid silicon rubber mold. 

For save liquid silicone injection molding cost, some mold factories will choose one shut-offer valves for two or four mold cavities & chambers. Some also choose cheap or homemade shut-off valves, which is nonstandard, liquid silicone rubber injection molded products quality is not good enough or not stable when lsr injection production.

Liquid Silicone Mold with nozzle shut-off valves design guide


Liquid Silicon Mold with shut-off valves design

Liquid Silicone Injection Mold without Shut-off Valves

Liquid silicone injection mold without shut-off valves, also called Open-ended Liquid Silicone Injection Mold, like edge-injection-gate plastic injection mold. Liquid silicone & lsr products have big injection gate mark or flow mark. This molded types mainly suit to produce big LSR silicon products like baby feeding bottle, produce not sizes and designs tolerances requirement like baby care products, or produce low-volume liquid silicone products.

Advantage of Liquid Silicone Injection Mold without Shut-off Valves

  • Save LSR injection molding cost

  • Suit to low-volume lsr injection molded

  • Suit to prototyping liquid silicone products

  • Recycle liquid silicone mold base

Disadvantage of Liquid Silicone Injection Mould without Shut-off Valves

  • Liquid silicone flow-mark or spot in LSR products

  • Injection gate is easy to blocking when production

  • Difficult to control injected dosage

  • Can't produce high precision liquid silicone rubber products & parts

  • Big liquid silicone rubber flashing, waste liquid silicon materials

Liquid Silicon Injection Mold without Shut-off Valve Mold Design Guide

Liquid Silicon Mold Manufacturing Process

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