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Mould used for injection molding and manufacture method for composite article

A technology of injection molding and manufacturing method, applied in the direction of coating, etc., can solve the problems of easy damage of transfer sheet and easy softening of transfer sheet

Active Publication Date: 2011-05-25
NISSHA PRINTING COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it cannot be said that the transfer sheet 12 in contact with the metal material 20 is in a state of being easily softened.
Therefore, the transfer sheet 12 becomes more likely to be damaged during mold clamping.

Method used

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  • Mould used for injection molding and manufacture method for composite article
  • Mould used for injection molding and manufacture method for composite article
  • Mould used for injection molding and manufacture method for composite article

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0058] Figure 1 to Figure 7 All are diagrams showing a molding process of a composite product using the mold according to the present invention.

[0059] The resin molded article according to the present invention includes: a metal body 20 having a convex portion 20a; a decorative layer formed on the surface of the metal body 20; and a resin portion 30 formed on the metal body 20a. On the back side of the body 20, this resin molded product is manufactured through the following manufacturing steps.

[0060] [metal body]

[0061] The metal body 20 is, for example, a metal stamped plate having a convex portion 20a or the like. In order to facilitate the formation of the decorative layer, the surface of the metal body 20 is preliminarily subjected to surface treatment such as coating of an adhesive or pasted with a sheet that is easy to adhere to the decorative layer. In addition, in order to easily fix the injected resin, an adhesive layer is applied in advance on the back of...

no. 2 approach

[0082] In this embodiment, only the configurations different from those of the first embodiment will be described, and the description of the same configurations will be omitted. Figure 8 is a diagram in which the transfer sheet 12 is positioned and held, Figure 9 It is a figure showing the middle of mold clamping, Figure 10 It is a figure which shows after mold clamping.

[0083] Such as Figure 8 As shown, in this embodiment, the first mold 1 is provided with a suction portion 13 for sucking the transfer sheet 12 around a portion of the cavity surface 1A for holding the metal body 20 . In addition, an O-ring 14 is arranged on the first mold 1 and the portion where the first holder 4 is recessed when the mold is closed.

[0084] [Processing steps for resin molding]

[0085] Such as Figure 8 As shown, after holding the transfer sheet 12 by clamping the transfer sheet 12 with the first clamping member 4 and the second clamping member 5, the transfer sheet 12 is heated ...

no. 3 approach

[0089] Figure 11 ~ Figure 13 A third embodiment of the present invention is shown. Such as Figure 11 As shown, in this embodiment, a slide mold 3 capable of moving relative to the first mold 1 along the clamping direction of the first mold 1 is provided inside the first mold 1, and the metal body 20 is disposed on the first mold 1. Slide mold3. The transfer sheet 12 is held along the molding surface 1 a of the first mold by a clip 15 that functions as a decorative sheet holding mechanism.

[0090] [Processing steps for resin molding]

[0091] Such as Figure 11 As shown, the slide mold 3 is held at a position receding from the molding surface 1 a of the first mold 1 , and the metal body 20 is disposed on the end surface 3A of the slide mold 3 . The transfer sheet 12 is disposed on the molding surface 1a of the first mold.

[0092] Next, the transfer sheet 12 is heated with a heater or the like as necessary, and then, as Figure 12 As shown, the slide mold 3 is advance...

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Abstract

The invention provides a mould used for injection molding and manufacture method for a composite article. In a mould used for injection molding used in manufacture of a composite article, the composite article forms a decorative layer on the surface of a metal body (20) provided with a protruding part (20a), and forms a resin part at the back side surface of the metal body (20), the mould used for injection molding is provided with: a first mould (1) is provided with a metal body (20); a second mould (2) and the first mould (1) are in spotting, a mould cavity used for injecting resins is formed between the first mould (1) and the metal body (20); and a decorative sheet keeping mechanism, before spotting of the first mould (1) and the second mould (2), disposes a transfer sheet (12) at a position, from which the transfer sheet gets away, of a molded surface of the second mould (2), and in the meantime that the transfer sheet (12) is pressed by and towards the protruding part (20a) of the metal body (20), makes the transfer sheet (12) be in a contact with the protruding part (20a) along the protruding part (20a).

Description

technical field [0001] The present invention relates to an injection mold for obtaining a composite product in which a decorative layer is formed on the surface of a metal body and a resin portion is formed on the back surface, and a method for producing the composite product. Background technique [0002] Molded products integrated with metal materials and resins are used in all fields such as automobiles, household electrical appliances, mobile phones, and personal computers. As a method of bonding a resin to a metal material to produce a composite product of metal and resin, a method of injection molding using a resin, or a method of applying an adhesive layer to the surface of a metal to bond a resin layer can be employed. [0003] Furthermore, the decoration on the surface of the metal material is performed by painting, sublimation transfer, laser printing, hot stamp, screen printing, or the like. [0004] In the case of performing decoration while injection molding th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/26B29C45/14
Inventor 大上善裕丰冈尚登嵯峨山洋介
Owner NISSHA PRINTING COMPANY
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