Surface shaping method of injection molding element and injection molding element

A technology of injection molded parts and injection molding, which is applied in the field of coating preparation, can solve the problems of weakening product competitiveness, hindering the application of painting, and increasing costs, so as to achieve the effects of improving product competitiveness, reducing painting processes, and saving man-hours

Active Publication Date: 2018-09-07
SAIC GENERAL MOTORS +1
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Problems solved by technology

However, after the introduction of spray painting, it brings disadvantages such as increased cost, additional processes and man-hours, VOC risk, and surface orange peel problems, which also hinders the application of spray paint on interior injection molding products; especially in the entry-level market where cost competition is becoming increasingly fierce In the competitive market of high-end cars, the introduction of spray paint for injection molded parts will greatly weaken the competitiveness of products

Method used

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  • Surface shaping method of injection molding element and injection molding element
  • Surface shaping method of injection molding element and injection molding element
  • Surface shaping method of injection molding element and injection molding element

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Embodiment Construction

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. Wherein the same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward or away from the geometric center of a particular component, respectively.

[0029] figure 1 It is a schematic flow chart of the surface shaping method of the injection molded part adopted in the specific embodiment of the present invention. like figure 1 As shown, the surface shaping methods of injection molded parts include:

[0030] (1) The inner surface of the mold for forming the injection part is etched for the first time, and a textured layer...

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Abstract

The invention discloses a surface shaping method of an injection molding element and the injection molding element. The surface shaping method comprises the following steps that (1) the inner surfaceof a mold for forming the injection molding element is subjected to primary corrosion; a grain layer is formed at the inner surface of the mold; (2) a grid layer is paved on the grain layer; the grainlayer is subjected to secondary corrosion by the grid layer, so that the dispersion degree of the grain particle diameter in the grain layer is reinforced; (3) sand grains are sprayed at the inner surface of the mold; bulges are formed at the surface of the grain layer; (4) an injection molding material is cast into the mold to form the injection molding element; the grain layer forms the grainsat the surface of the injection molding element. The surface shaping method of the injection molding element and the injection molding element provided by the invention have the advantages that the surface glossiness of the injection molding element can be reduced; the surface quality is improved; the production cost is reduced; the product competitiveness is improved.

Description

technical field [0001] The present invention relates to the technical field of coating preparation, and more particularly, to a surface molding method for injection molded parts and injection molded parts. Background technique [0002] In the automotive interior parts, take the instrument panel as an example, the instrument panel is set in the middle area of ​​the front cabin of the car body, and its appearance quality is highly concerned by consumers, especially the driver and co-pilot occupants, which directly affects the To the consumer's evaluation of the interior design of the vehicle. The instrument panel is usually an injection molded part, and the surface treatment of the injection molded part, such as setting a coating on the surface, can reduce the gloss, block the appearance defects, improve the surface quality and improve the aesthetics. [0003] Injection molding parts usually have the problem of high gloss. If the injection molded instrument panel is directly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/38B29C45/37
CPCB29C33/3842B29C45/372
Inventor 陶靓施君鸿周晨
Owner SAIC GENERAL MOTORS
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