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Preparation method of workpiece

A technology of workpiece and film sleeve, applied in the direction of electrical components, electrical equipment shell/cabinet/drawer, etc., can solve the problems of discrete, irregular, continuous texture on the surface of the workpiece, etc.

Inactive Publication Date: 2012-03-14
LENOVO (BEIJING) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, it is usually only possible to prepare discrete, irregular, or precise matching problems on the surface of the workpiece. Therefore, the prior art cannot solve the problem of forming continuous textures on the surface of the workpiece.

Method used

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  • Preparation method of workpiece
  • Preparation method of workpiece

Examples

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Effect test

preparation example Construction

[0039] An embodiment of the present invention provides a method for preparing an injection molded workpiece, comprising:

[0040] The workpiece film cover is installed on the first mold body of the workpiece mold, the workpiece mold is composed of the first mold body and the second mold body, the workpiece film cover is composed of the first part and the second part, and the first part of the The shape matches the shape of the first mold cavity of the first mold body, the shape of the second part matches the part shape of the second mold cavity of the second mold body, and the workpiece film sleeve matches the shape of the second mold cavity. The second mold cavity forms a third mold cavity matched with the workpiece;

[0041] Injecting the resin composition into the third cavity;

[0042] curing the resin composition to obtain a composite workpiece, the composite workpiece has the workpiece film sleeve;

[0043] A workpiece is obtained by peeling the workpiece film sleeve f...

Embodiment 1

[0060] Use a polyethylene film with a thickness of 0.2mm as the material, heat press molding, and obtain such as figure 1 Work piece film sleeve shown;

[0061] The workpiece film cover is installed on the first mold body of the workpiece mold of the injection molding machine; a layer of polyurethane release agent is sprayed in the workpiece film cover, and then the second mold body of the workpiece mold is assembled with the first mold to form a workpiece mold. A film sleeve is located within the workpiece mold. At this time, the workpiece film cover and the second mold cavity of the second mold body form a third mold cavity that matches the workpiece;

[0062] Inject molten polyphenylene ether (PPO) into the third mold cavity and solidify to obtain a composite workpiece with a workpiece film cover;

[0063] Remove the workpiece film sleeve from the composite workpiece to obtain the following figure 2 The injection molded workpiece.

[0064] The outer surface of the inje...

Embodiment 2

[0071] Using a polyethylene terephthalate PET film with a thickness of 0.3mm as a raw material, first press the continuous texture pattern LENOVO on one side of the film; then heat press the film and cool it to obtain a workpiece film sleeve;

[0072] The workpiece film sleeve is installed on the first mold body of the workpiece mold of the injection molding machine;

[0073] Spray a layer of polyurethane release agent in the workpiece film cover, then take the second mold body of the workpiece mold and assemble the first mold to form a workpiece mold. matching third cavity;

[0074] Inject molten polyphenylene ether (PPO) into the third mold cavity and solidify to obtain a composite workpiece with a workpiece film cover;

[0075] Remove the workpiece film sleeve from the composite workpiece to obtain the following Figure 5 The injection molded workpiece.

[0076] Figure 5 The outer surface of the injection molded workpiece shown is flat and smooth, and the continuous te...

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Abstract

The invention provides a preparation method of a workpiece. The method comprises technical points that: a workpiece film sleeve is arranged on a first mold body of a workpiece mold; the workpiece mold is composed of a first mold body and a second mold body; the workpiece film sleeve is composed of a first section and a second section; the shape of the first section is coupled with a first mold cavity of the first mold body; the shape of the second section is coupled with a second mold cavity of the first mold body; the workpiece film sleeve and the second mold cavity form a third mold cavity coupled with the workpiece; a resin composition is injected into the third mold cavity; the resin composition is cured, such that a composite workpiece is obtained; the workpiece film sleeve is peeled from the composite workpiece, such that the workpiece is obtained. Compared to existing technologies, with the method provided by the invention, a trace of a parting line is prevented from being left on the surface of the injection-molded workpiece. Therefore, an injection-molded workpiece with a good appearance quality can be obtained, and a subsequent polishing process specially carried out for removing the parting line trace is not required.

Description

technical field [0001] The invention relates to the technical field of resin composition molding, in particular to a method for preparing a workpiece. Background technique [0002] In the field of electronic products such as notebook computers, computer monitors, mobile phone casings, and all-in-one machines, injection molded workpieces prepared from resin compositions have been widely used. Compared with traditional metal workpieces, injection molded workpieces have the advantages of low price, high production efficiency, and easy molding. [0003] When preparing some types of injection molded workpieces, due to the particularity of the workpiece shape, it is necessary to set the mold parting surface at the largest cross-section in the demoulding direction of the workpiece (the mold parting surface can also be called the splicing surface left by the mold splicing). When preparing this type of injection molded workpiece, the molten resin composition (such as nylon and polys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00H05K5/00
Inventor 韩小勤马雷范小利
Owner LENOVO (BEIJING) LTD
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