Liquid silicone two-shot molding, surface treatment method for middle parts

A technology of secondary molding and two-shot molding, which is applied to special surfaces, pre-treatment surfaces, devices for coating liquids on surfaces, etc. Problems such as unsatisfactory bonding effect

Active Publication Date: 2011-12-07
JIERUI PRECISE SILICONE INJECTION MOLDING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this method of directly applying the primer to the surface of the part makes the distribution of the primer uneven on the electroplated surface, metal surface such as paint sprayed, or the surface of parts with high appearance requirements, forming irregular marks and spots. Affects the quality and appearance of LIM overmolding and 2 Component Injection Molding with Liquid Silicone Rubber, and the bonding effect is not ideal

Method used

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Embodiment Construction

[0019] The present invention will be described in further detail below in combination with specific embodiments.

[0020] The general idea of ​​the present invention is to dilute the primer with diluting additives. After diluting the primer, use the polymer material adsorbed to the primer to dip the diluent and apply it to the surface of the parts. The diluted primer The volume ratio with the additive is 1:1 to 1:5, so that the primer is evenly distributed on the surface of the part;

[0021] As a preferred embodiment of the present invention, the ratio of the dilution additive to the primer is 1:5.

[0022] As a preferred embodiment of the present invention, the material adsorbed by the primer is the same foamed polymer material as the primer.

[0023] As a preferred embodiment of the present invention, the foamed polymer material is sponge or foam.

[0024] Among them, liquid silicone secondary molding and double-shot molding can use silicone-based primers, such as XP81-A6...

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PUM

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Abstract

The invention discloses a surface treatment method for liquid silica gel secondary molding and double-shot molding middle parts. The method includes: 1. Diluting the primer with a dilution additive, and using a foam-shaped polymer to dilute the diluted primer The material is applied to the surface of the part. The ratio of the diluted primer to the additive is generally 1:1 to 1:5, so as not to affect the bonding effect of the primer, so as to improve the dispersion effect of the primer on the surface of the part. The primer is evenly distributed on the surface of the part, and the appearance is clear after secondary molding or double-shot coating with liquid silicone. 2. Use plasma treatment, and other treatment methods to improve the surface tension of parts, improve the surface tension of parts, so that the primer and liquid silicone LSR / parts, self-adhesive liquid silicone Self-bonding LSR and parts, liquid silicone and parts are very good Firmly bonded, solving the problem of low bonding strength in the liquid silicone injection process.

Description

【Technical field】 [0001] The invention relates to the technical field of surface treatment, in particular to a surface treatment method for middle parts of liquid overmolding (LIMovermolding) and double-shot molding (2 Component Injection Molding with Liquid SiliconeRubber). 【Background technique】 [0002] Before doing LIM overmolding and 2 Component Injection Molding with Liquid Silicone Rubber, [0003] Apply primer directly on the electroplated surface, metal surface sprayed with paint, and the surface of parts with high appearance requirements), so that the liquid silicone can be bonded to the surface of the part. [0004] However, this method of directly applying the primer to the surface of the part makes the distribution of the primer uneven on the electroplated surface, metal surface such as paint sprayed, or the surface of parts with high appearance requirements, forming irregular marks and spots. It affects the quality of LIM overmolding and 2 Component Injection ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D5/00B05D3/00B05C9/00C09D183/00C09D1/00C09D7/12
Inventor 李建新
Owner JIERUI PRECISE SILICONE INJECTION MOLDING
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