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Liquid silica gel cold-runner mould

A liquid silicone and cold runner technology, applied in the field of silicone mold manufacturing, can solve the problems of silicone products such as lack of glue, trapped air, poor cavity exhaust, etc., achieve good cooling effect, reduce local temperature differences, and improve cooling effect Effect

Pending Publication Date: 2019-08-02
厦门豪特维思科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a liquid silicone cold runner mold, which solves the problem of poor cavity exhaust and avoids serious air trapping, which leads to quality defects such as lack of glue in silicone products.

Method used

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  • Liquid silica gel cold-runner mould
  • Liquid silica gel cold-runner mould
  • Liquid silica gel cold-runner mould

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Embodiment Construction

[0031] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0032] see Figure 1 to Figure 6 , this embodiment provides a liquid silicone cold runner mold, which has a mold core 8, and the mold core 8 includes a concave template 81, a stripping template 82 and a convex template 83 arranged in layers, and the material flow end of the corresponding cavity on the concave template 81 There is a vent hole 811, and the end of the vent hole 811 is used to communicate with the vacuum pump outside the mould. There is a sealing ring between the concave plate 81 and the stripping plate 82. The cavity and the vent hole 811 are located in the sealing area surrounded by the sealing ring. Inside.

[0033] If the air in the cavity cannot be completely exhausted before injecting the liquid silicone into the cavity, the air in the cavity will be trapped at the end of the material flow due to the high temperature and compressi...

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Abstract

The invention discloses a liquid silica gel cold-runner mould, and relates to the technical field of silica gel mould manufacturing. The liquid silica gel cold-runner mould is provided with mould cores; each mould core comprises a concave mould plate, a stripper plate and a convex mould plate which are arranged in a stacked manner; exhaust holes are formed in the parts, corresponding to the ends of material flows of cavities, of the concave mould plates; the ends of the exhaust holes communicate with a vacuum pump; sealing rings are arranged between the concave mould plates and the stripper plates; and the cavities and the exhaust holes are positioned in sealing areas enclosed by the sealing rings. The sealing rings are arranged in the mould cores, so that the cavities are positioned in sealed environments; and the cavities communicate with the exhaust holes, after the liquid silica gel cold-runner mould is closed, the cavities are rapidly vacuumized by the vacuum pump, and a rubber material is injected after the vacuum degree reaches a rated degree, so that the situation that the quality defects such as hungry joint and the like of silica gel products are caused since a serious air entrapment phenomenon occurs is avoided.

Description

technical field [0001] The invention relates to the technical field of silicone mold manufacturing, in particular to a liquid silicone cold runner mold. Background technique [0002] With the wide application of silicone products in daily chemical, medical, electronics and automobile industries, in order to achieve high-efficiency, high-quality and low-cost production in the silicone processing industry, liquid silicone (LSR) injection molding technology has developed rapidly. The existing liquid silicone injection molds have the following disadvantages: [0003] (1) Needle valve nozzles are used for liquid silicone injection molding. For traditional double-threaded needle valve nozzles, when the water flow is input from one spiral waterway to the intersection of the double helix waterways, the water flow cannot be ideally output from the other spiral waterway. Part of the water flow retraces the same way, therefore, it may cause the needle valve nozzle to overheat. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/26B29C45/34B29C45/27B29C45/73B29C45/78
CPCB29C45/2608B29C45/2737B29C45/345B29C45/78B29C2045/2753B29C2945/76531
Inventor 陈碧龙林伟煌陈臻洪妤姗陈菊春
Owner 厦门豪特维思科技有限公司
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