Liquid silicagel preparation and injection moulding method

An injection molding, liquid silicone technology, applied in the direction of coating, can solve the problems of material bubbles, affecting the service life and aesthetics, unable to fully solidify, etc., to reduce errors, reduce uneven preparation, improve manufacturing speed and model quality. Effect

Inactive Publication Date: 2019-01-11
DALIAN JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the above-mentioned technical problems that artificially prepared materials are prone to incomplete solidification and many material bubbles affect the service life and appearance, a liquid silicone preparation and injection molding method is provided.

Method used

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  • Liquid silicagel preparation and injection moulding method
  • Liquid silicagel preparation and injection moulding method
  • Liquid silicagel preparation and injection moulding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Due to the long overall size, this design needs to be poured twice;

[0057] (2) Raw material preparation: first weigh 15.0 g of silica gel A reagent with an electronic balance;

[0058] (3) Reagent mixing: After clearing the balance, continue to add 15.0 g of B reagent, and the whole operation process is about 3 minutes;

[0059] (4) Stirring vulcanization: the operating room temperature is 24°C, the stirring speed is about 70rmp, and the stirring time is controlled for 90s to fully mix the materials;

[0060] (5) Remove air bubbles: pour the raw materials prepared in step (3) into a centrifuge tube, and remove air bubbles by centrifuging for 1 min with a centrifuge speed of 3000rmp;

[0061] (6) Mold treatment: apply a layer of glycerin evenly in the mold with a brush;

[0062] (7) Injection molding: Slowly inject the mixed raw materials without bubbles after centrifugation in step (4) into the inner cavity of the first molding mold 3 ( figure 1 ) to fill the e...

Embodiment 2

[0069] (1) Raw material preparation: It is estimated that the finished product needs about 28g of silica gel. Considering the possible waste in the material configuration process, the best ratio of silica gel curing is 1:1, so pour the silica gel A reagent into the beaker during the material ratio stage 15.0g;

[0070] (2) Reagent mixing: After clearing the balance, continue to add 15.0 g of reagent B, and the whole operation process is about 3 minutes;

[0071] (3) Stirring vulcanization: operate at room temperature of 28°C, use a magnetic stirrer to stir at a speed of about 40rmp, and stir for 5 minutes to fully mix reagent A and reagent B;

[0072] (4) Remove air bubbles: pour the raw materials prepared in step (3) into a centrifuge tube, and remove air bubbles with a centrifuge for 2 minutes, and the centrifugal speed is 2500rmp;

[0073] (5) Mold treatment: use a brush on the inner side of the outer wall 13 of the mold ( Figure 4 ) apply a layer of glycerin evenly;

...

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Abstract

The invention relates to the technical field of silicagel materials and particularly relates to a liquid silicagel preparation and injection moulding method. The method comprises the following steps:raw material preparation, reagent mixing, stirring and vulcanization, bubble removal, mold treatment, injection moulding, supplementary restoring, frozen moulding, die sinking and demoulding, and casttrimming. According to the technical scheme, the technical problems that the service life and appearance are influenced by high incomplete consolidation possibility, many material bubbles and the like in artifical prepared materials in the prior art are solved, and the purposes of simple technical scheme, easiness in operation, complete consolidation and good product stability are realized.

Description

technical field [0001] The invention relates to the technical field of silicone rubber materials, in particular to a preparation and injection molding method of liquid silicone rubber. Background technique [0002] The main component of silica gel is silicon dioxide, which has stable chemical properties, good heat resistance and cold resistance, and is not easy to react with other materials. Silicone material is non-toxic and has no irritating smell, good softness, high elasticity and good biocompatibility. Therefore, this material is used as implant material in medicine, such as artificial joints, prosthetic noses, and artificial breasts. Due to its good insulation properties, silica gel is also commonly used as packaging or potting materials for electronic components. The superior physical properties of silica gel are mainly reflected in the mechanical strength. The tensile strength range of liquid silicone rubber is between 3.6-11.0MPa, the tear strength range is between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00B29C45/16B29C45/17
CPCB29C45/00B29C45/1615B29C45/17B29C45/1769B29C2045/1784
Inventor 武力李欣芯鞠尔男
Owner DALIAN JIAOTONG UNIVERSITY
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