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Die

A mold and datum technology, applied in the field of molds for fiber-reinforced resin molded products, can solve problems such as fiber breakage

Active Publication Date: 2021-10-26
日本技术管理株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When drawing a preform with such a structure, there is a problem that the fibers break at the corners of the mold (where the preform deforms)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (structure)

[0056] exist figure 1Among them, 1 is a mold for manufacturing a fiber-reinforced resin molded product in a drawn shape, 2 is a concave mold, 3 is a prepreg, 4 is an anti-wrinkle device, and 5 is a punch. While the prepreg 3 is restrained by the anti-wrinkle device 4, the punch 5 passing through the hole of the anti-wrinkle device 4 is moved upward, and the center part of the prepreg 3 is pressed into the concave part of the concave mold 2, thereby This forms a deep drawn shape. In addition, in the present embodiment, although the punch 5 is raised from the bottom to the top, it can also be formed so that the punch 5 and the anti-wrinkle device 4 are fixed and the concave mold 2 is lowered from the top to the bottom. In addition, the punch 5 may be disposed above the concave die 2 to face each other, and one or both of the punch 5 or the concave die 2 may be moved up and down to perform drawing.

[0057] (concave mold)

[0058] In Example 1, the female...

Embodiment 2

[0088] Figure 7 , Figure 8 It is the mode of Example 2 of the present invention. For the die 1A in Example 2, the convex die 7 (convex punch) was used instead of the cylindrical or prismatic punch of Example 1. And, around the convex portion of the convex mold 7, an anti-wrinkle device 9 is equipped with a stretchable portion 8 (refer to Figure 5 (a)).

[0089]As for the processing, as in Example 1, the prepreg 3 was placed above the heated convex mold 7 and the anti-wrinkle device 9 and raised. After being in contact with the prepreg 3, when a predetermined pressure is reached, the stretchable portion 8 is contracted so that the anti-wrinkle device 9 does not apply more than necessary pressure to the prepreg. On the other hand, the convex mold 7 is raised to perform drawing forming so that the prepreg 3 is formed into a predetermined shape (refer to Image 6 (b)).

[0090] The concave mold 2 is the same as in the first embodiment. The anti-wrinkle device 9 is provid...

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PUM

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Abstract

The invention provides a pressing device that does not leak resin and that is capable of significantly reducing the number of voids formed in the resin while using a smaller amount of discharged resin than conventional amounts. A die which comprises a recessed die, a blank holder, and a punch passing through the blank holder, and which is for manufacturing a fiber-reinforced resin molded article having a drawn shape obtained by deep drawing a prepreg, wherein: the recessed die has a first reference surface, a second reference surface that forms the bottom of a recessed shape from the first reference surface, and an upright surface connecting the first reference surface and the second reference surface; the blank holder has a blank holder surface that sandwiches the prepreg between the first reference surface and the blank holder surface; the punch has a punch surface that sandwiches the prepreg between the second reference surface and the punch surface, and a punch side surface that sandwiches the prepreg between the upright surface and the punch side surface; and there is a prescribed relationship between R1, which is the radius of curvature of the angle formed by the second reference surface and the upright surface, and R3, which is the radius of curvature of the angle formed by the punch surface and the punch side surface.

Description

technical field [0001] The present invention relates to a mold for deep-drawing a prepreg to produce a drawn-shaped fiber-reinforced resin molded article. Background technique [0002] In recent years, due to environmental problems, the automobile industry and the aviation industry are making efforts to improve fuel consumption. Among them, fiber-reinforced resins are expected to replace metals in order to reduce the weight of car bodies and airframes, and attention is increasing. [0003] Fiber-reinforced resins are widely used in various fields due to the following characteristics: they can be molded and shaped by heating, they have high productivity, they are easy to perform secondary processing such as welding, they have electrical insulation properties, and they do not corrode Moreover, recyclability is also excellent. [0004] In addition, carbon fiber-reinforced resins that use carbon fibers as fibers are light, high-strength, and high-rigidity. Therefore, they are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/00
CPCB29C33/00B29C43/36B29C70/461B29C43/34B29C33/42B29C51/082B29C51/004B29K2105/08B29C51/428B29C51/08B29C70/46B29K2105/0872
Inventor 济藤友明首藤祥史
Owner 日本技术管理株式会社