Method and apparatus for producing fiber-reinforced resin molding material

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United States of America Patent

PATENT NO 11919255
APP PUB NO 20230050464A1
SERIAL NO

17978204

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Abstract

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Provided are a method and an apparatus for manufacturing a fiber-reinforced resin molding material by which, when the fiber-reinforced resin molding material is manufactured, separated fiber bundles can be supplied to a cutting machine in stable condition while avoiding the influence of meandering of the fiber bundles or slanting or meandering of filaments occurring in the fiber bundles. A method for manufacturing a sheet-shaped fiber-reinforced resin molding material in which spaces between filaments of cut-out fiber bundles (CF) are impregnated with resin includes, so that a condition of the following expression (1) is satisfied, intermittently separating fibers of the continuous fiber bundles (CF) in a longitudinal direction by a rotational blade (18) serving as a fiber separating part and cutting out the fiber bundles with an interval therebetween in a longitudinal direction of a cutting machine (13A) to obtain the cut-out fiber bundles (CF). Expression (1): 1≤a/L (where a represents a length of a separated part of the continuous fiber bundles (CF) and L represents an interval when the fiber bundles (CF) are cut out in the longitudinal direction.)

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI CHEMICAL CORPORATION1-1 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1008251 ?1008251

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kanehagi, Junji Tokyo, JP 16 20
Mizutori, Yukihiro Tokyo, JP 24 35
Samejima, Tadao Tokyo, JP 28 61
Watanabe, Yasushi Tokyo, JP 204 2847

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