Xiamen Better Silicone Rubber Co., Ltd
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Our Company

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@lsr-molding.com
Skype : admin@better-silicone.com
Add: 7F7B09,Harmony Square,No.2 Huli Avenue,Huli District Xiamen,China

What's the difference between LSR and thermoplastic injection molds

Views:4     Author:Site Editor     Publish Time: 2019-07-24      Origin:Site

What's the Difference Between LSR and Thermoplastic Injection Molds

Using different ejecot pins is the main difference to tell thermoplastic injection mold and LSR mold.

medical plastic injection molded tubing

For plastic molds, usually use straight-wall ejector pins. The straight pins can cross over the parting line of the plastic parts, so that half the ejector pin is on the part and another half is on the parting line shutoff.

For LSR molds, must use the ejector pins with a tapered shutoff and can’t invade the parting line shutoff area.

Liquid silicone rubber molding processing has a special requirement that is cacuum.

LSR molding also needs a chemical curing process. Liquid silicone rubber comes in two tubes. One tybe has a catalyst and the other one has the crosslinker. And because these two parts mix a chemical reaction takes place that can creat some gas. It is important to remove any air from the cavity before injection to ensure that the mold can properly vent the gases evolved during curing.

Liquid silicone injection mold for nasal mask

During the thermoplastic mold process, plastic material will create outgassing, the mold will have enough gaps in the fit and release areas to release these gases along with the air contained in the cavity area.

LSR and thermoplastic injection molds another difference: Temperature control

LSR Mold:  mold must be heated to 320-420F to cure the material, most commonly with electrical cartridfe heaters.

Plastic Injection Mold: temperature is commonly less than 170F. Becuase themoplastic molding requires cooling the material in the mold, temperature control is typically achieved with circulating oil or water.

Needle Valves for LSR Injection Molding

  1. Liquid  Injection Mold-making (Liquid Silicone Rubber Molding)
  2. Liquid Silicone Rubber Products & Parts Mass Production
  3. Moldability & Manufacturability Analysis and Designs Support 
Tel: 86-592-5616001(Ext.809)


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