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Molding precursor, process for manufacturing fiber-reinforced resin molding, and fiber-reinforced resin molding

A fiber-reinforced resin and molding technology, which is applied in the fields of molding precursors, fiber-reinforced resin moldings, and fiber-reinforced resin moldings, can solve problems such as increased costs, increased processing hours or procedures, and achieves easy operation and manufacturing. The effect of low cost, easy and stable manufacture

Inactive Publication Date: 2007-11-07
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This increases processing man-hours or processes, resulting in an increase in cost

Method used

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  • Molding precursor, process for manufacturing fiber-reinforced resin molding, and fiber-reinforced resin molding
  • Molding precursor, process for manufacturing fiber-reinforced resin molding, and fiber-reinforced resin molding
  • Molding precursor, process for manufacturing fiber-reinforced resin molding, and fiber-reinforced resin molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0250] Using the molding apparatus described in FIG. 4 and the molding method described in FIG. 6 , a motorcycle engine cover with a total length of about 600 mm described in FIGS. 7 and 8 was manufactured in the procedure described below. The manufactured engine cover as a whole has excellent strength and rigidity, and has no defective parts.

[0251] Four substrates B1 cut to be about 5 mm smaller than the molded shape side were prepared as the first substrate 52 . Three of the substrates B1 are stacked and arranged on the forming mold lower mold 58 shown in FIG. 6 . In order to eliminate the gap between the first base material 52 and the shape of the mold, the base material B3 was arranged as the second base material 53 so as to protrude from the ridgeline of the mold by an average of 5 mm as a whole. Then, the remaining one piece of base material B1 is superimposed thereon.

[0252] A thermoplastic adhesive material (epoxy-modified thermoplastic resin, melting point: 71°...

Embodiment 2

[0264]A molded body was produced in the same manner as in Example 1 except that the second base material in Example 1 was changed to Base B4. Thin burrs composed of the base material B4 and the epoxy resin were formed around the obtained molded body.

[0265] The above-mentioned burrs are removed using a simple deburring tool as well as a sanding tool. The deburring process is completed in about 1 minute and 30 seconds, and deburring can be easily performed. Therefore, a large-scale device such as water jet processing or NC machining is not required, and the molded body can be finished with only a simple deburring tool.

Embodiment 3

[0267] A molded article was produced in the same manner as in Example 1, except that the first base material in Example 1 was changed to the base material B2 and the second base material was changed to the base material B5. Thin burrs composed of the base material B5 and the epoxy resin were formed around the obtained molded body.

[0268] The above-mentioned burrs are removed using a simple deburring tool as well as a sanding tool. The deburring process is completed in about 2 minutes, and deburring can be easily performed. Therefore, a large-scale device such as water jet processing or NC machining is not required, and the molded body can be finished with only a simple deburring tool.

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Abstract

A molding precursor which comprises a main body part and a burr formation part protruding outward from the edge of the main body part and extending continuously along the edge, wherein the main body part comprises a first base comprising many reinforcing fibers and a second base which comprises many fibers and has been superposed on the first base in an outer peripheral part of the main body part, the burr formation part is constituted of that part of the second base which protrudes outward from the edge of the main body part, and spaces among the many fibers constitute passages for a molding resin.

Description

technical field [0001] The present invention relates to a molding precursor, a method for producing a fiber-reinforced resin molded body obtained by impregnating the molding precursor with a matrix resin by an RTM (Resin Transfer Molding) method, and a fiber-reinforced resin molded body. The molding precursor of the present invention facilitates finishing of a fiber-reinforced resin molding formed from the molding precursor and a resin. Background technique [0002] Fiber-reinforced resins (FRP), particularly carbon fiber-reinforced resins (CFRP), are used in various fields as composite materials that are lightweight and have high mechanical properties. As one of the molding methods of FRP moldings, the RTM method is known. In this method, a reinforcing fiber base material is placed in the molding cavity of the molding die, and after the mold is closed, a fluid matrix resin is injected into the mold and heated. Solidify or cool to solidify. In this method, the inside of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C39/10B29C70/10B29B11/16B29K105/08
CPCB29C70/48B29C37/02B29C70/865B29C70/345B29C70/086B29C70/545Y10T428/24942Y10T428/24992Y10T428/24777Y10T428/2495Y10T428/249939Y10T442/60Y10T428/249953B29C70/302B29C70/10B29C39/10
Inventor 山崎真明关户俊英竹本秀博
Owner TORAY IND INC
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