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Die for injection compression molding

A technology of compression molding and mould, applied in the direction of coating, etc., can solve the problem of insufficient stability of the position

Active Publication Date: 2008-07-09
NISSHA PRINTING COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the decorative injection compression molded product can move in the molding space part 30, and the position is not stable enough.

Method used

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  • Die for injection compression molding
  • Die for injection compression molding
  • Die for injection compression molding

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0053] First, a mold for injection compression molding according to a first embodiment will be described based on the drawings.

[0054] Fig. 1 is a schematic cross-sectional view showing a state in which a mold is opened.

[0055] In this figure, the first mold 1 is formed in a square shape as in the conventional one, and the surface facing the second mold 2 is engraved with a shape for forming the surface of an injection compression molded product.

[0056] On the other hand, the second mold 2 is formed in a square shape with a width and a height corresponding to those of the first mold 1 . In addition, the surface of the second mold 2 opposite to the first mold 1 is equipped with a compression block 12 engraved with a shape for forming the back surface of the injection compression molded product. Around the compression block 12, an outer peripheral plate 11 is provided for constituting the outer peripheral shape of the injection compression molded product. Like the second...

no. 2 Embodiment approach

[0083] In this second embodiment, the mold for injection compression molding according to the present invention is used as a mold for simultaneous injection compression molding and decoration. Next, an injection compression molding simultaneous decoration mold according to a second embodiment will be described based on the drawings. The description of the same configuration as that of the above-mentioned first embodiment is omitted.

[0084] Fig. 8 is a schematic cross-sectional view showing a state in which the mold is opened.

[0085] In this figure, the decorative sheet 3 is arranged between the first mold 1 and the second mold 2 arranged to face each other. The decorative sheet 3 is formed of a base sheet 51, a decorative layer 50, and the like. The decorative layer 50 is composed of a pattern layer 52 and an adhesive layer 53 (see FIG. 15 ), and is used when only the decorative layer 50 is to be transferred onto the molded resin 31 .

[0086] Fig. 9 is a schematic sect...

no. 3 Embodiment approach

[0113] This third embodiment is another embodiment of the above-mentioned second embodiment. Next, a simultaneous decoration mold for injection compression molding according to a second embodiment will be described based on the drawings. The description of the same configuration as that of the above-mentioned second embodiment is omitted.

[0114] Fig. 16 is a schematic cross-sectional view showing a state in which the mold is opened.

[0115] In this figure, the first mold 1 includes a suction device 70 that sucks the decorative sheet 3 arranged between the first mold 1 and the second mold 2 . The suction device 70 includes a communication portion 71 communicating with the mold cavity 1a formed in the first mold 1 for forming a molding space, and a suction device 72 communicating with the communication portion 71 and sucking air. The suction device 70 can hold the decorative sheet 3 in a state along the mold cavity 1 a by suctioning the decorative sheet 3 . Therefore, defo...

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Abstract

The present invention provides a mold for injection compression molding capable of maintaining the position of the injection compression molded product in a molding space (30) after molding the injection compression molded product. According to the present invention, a compression block (12) and an outer peripheral plate (11) are provided in the second mold (2), wherein the compression block reduces the volume of the molding space (30) to compress the filled molding resin (31 ), the peripheral plate is located around the compression block (12). Its structure can change the relative positional relationship between the compression block (12) and the outer peripheral plate (11), without causing the outer peripheral plate (11) and the ejector pin used to eject the injection compression molded product from the second mold (2) The relative positional relationship of (24) changes.

Description

technical field [0001] The present invention relates to a mold for injection compression molding, and more particularly to a mold for injection compression molding simultaneous decoration for manufacturing injection compression molding simultaneous decoration which does not require post-processing and has excellent optical characteristics. Background technique [0002] Conventionally, as a method of decorating the surface of a resin molded article, there is an injection molding simultaneous decoration method using a decoration sheet such as a transfer material or an IMD (registered trademark: Nippon Photo Printing Co., Ltd.) foil. In recent years, the application range of injection molding and decoration method has been gradually expanded. This injection molding simultaneous decoration method is also applied to a product having a transparent portion in a wide range of the surface of the molded product, such as a mobile phone window panel. At this time, the liquid crystal sc...

Claims

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Application Information

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IPC IPC(8): B29C45/56B29C45/40B29C45/14
CPCB29C45/14016B29C45/14065B29C45/14811B29C45/27B29C45/4005B29C45/561B29C2045/14155B29K2995/002B29C45/14B29C45/40B29C45/56
Inventor 藤村俊次
Owner NISSHA PRINTING COMPANY
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