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公开(公告)号：US11919255B2
公开(公告)日：2024-03-05
申请号：US17978204
申请日：2022-10-31
IPC分类号： B29C70/00 , B29B11/00 , B29B11/02 , B29B15/00 , B29B15/12 , B29C70/10 , B29C70/42 , B65H35/00 , B65H35/08 , D01D11/00 , D01D11/02 , B29K31/00 , B29K307/04
CPC分类号： B29C70/10 , B29B11/02 , B29B15/122 , B29C70/42 , B65H35/0086 , B65H35/08 , D01D11/02 , B29C2793/0081 , B29K2031/00 , B29K2307/04
摘要： 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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公开(公告)号：US11660783B2
公开(公告)日：2023-05-30
申请号：US17108230
申请日：2020-12-01
CPC分类号： B29B15/122 , B29C70/06 , B29C70/12 , B29C70/504 , C08J5/04 , C08J5/042 , B29K2063/00 , B29K2307/04 , C08J2363/00
摘要： Provided is a fiber-reinforced resin material molding in which fluctuations of the dispersion state of the fiber bundle in the molding is small, the generation of a resin pool is suppressed, and fluctuations in physical properties such as tensile strength and modulus of elasticity are suppressed; a method for manufacturing the same, and a method for manufacturing a fiber-reinforced resin material. Provided is a fiber-reinforced resin material molding comprising: a fiber bundle comprising a plurality of reinforcing fibers; and a matrix resin, wherein a coefficient of variation in fiber content of the reinforcing fibers per unit zone of 0.1 mm square on a cut face along a thickness direction is 40% or less.
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公开(公告)号：US11643513B2
公开(公告)日：2023-05-09
申请号：US16876173
申请日：2020-05-18
发明人： Junji Kanehagi , Tadao Samejima
CPC分类号： C08J5/042 , C08J5/243 , C08J2300/00
摘要： A method for manufacturing a fiber-reinforced resin molding material having a cut fiber tow impregnated with a resin includes a separation step of intermittently separating a fiber tow and forming at least two separation-processed lines arranged side by side in a width direction of the fiber tow and a cutting step of cutting the fiber tow at an interval in the longitudinal direction, and the separation step and the cutting step are carried out to satisfy (1) to (3). (1) 1≤c/L≤50 (2) c
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公开(公告)号：US12023876B2
公开(公告)日：2024-07-02
申请号：US17036333
申请日：2020-09-29
IPC分类号： B29C70/00 , B29C70/12 , B29C70/14 , D01D11/00 , D01D11/02 , D02J1/00 , D02J1/18 , B29K101/10 , B29K105/12 , B29K307/04
CPC分类号： B29C70/14 , B29C70/12 , D01D11/02 , D02J1/18 , B29K2101/10 , B29K2105/12 , B29K2307/04
摘要： What is provided is a method for stably producing a fiber-reinforced resin molding material by splitting a fiber bundle such that a split portion becomes long while anon-split portion is shortened. A method for producing a fiber-reinforced resin molding material in which a cut fiber bundle is impregnated with a resin, the method comprising a splitting step of splitting the fiber bundle with a splitting machine at intervals in a longitudinal direction and a cutting step of cutting the fiber bundle at intervals in the longitudinal direction after the splitting step, in which the splitting machine comprises a rotary blade having a releasing section and a spacer member adjacent to the rotary blade.
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公开(公告)号：US11518116B2
公开(公告)日：2022-12-06
申请号：US17216294
申请日：2021-03-29
IPC分类号： B29C70/00 , B29B11/00 , B29B15/00 , B65H35/00 , D01D11/00 , B29C70/10 , D01D11/02 , B29B15/12 , B29B11/02 , B29C70/42 , B65H35/08 , B29K31/00 , B29K307/04
摘要： 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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公开(公告)号：US10933563B2
公开(公告)日：2021-03-02
申请号：US15973919
申请日：2018-05-08
摘要： Provided is a fiber-reinforced resin material molding in which fluctuations of the dispersion state of the fiber bundle in the molding is small, the generation of a resin pool is suppressed, and fluctuations in physical properties such as tensile strength and modulus of elasticity are suppressed; a method for manufacturing the same; and a method for manufacturing a fiber-reinforced resin material. Provided is a fiber-reinforced resin material molding comprising: a fiber bundle comprising a plurality of reinforcing fibers; and a matrix resin, wherein a coefficient of variation in fiber content of the reinforcing fibers per unit zone of 0.1 mm square on a cut face along a thickness direction is 40% or less.
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公开(公告)号：US20230020921A1
公开(公告)日：2023-01-19
申请号：US17945185
申请日：2022-09-15
摘要： Provided is a useful improvement in a CF-SMC manufacturing technique comprising an SMC manufacturing method using a continuous carbon fiber bundle having a filament number of NK and partially split into n sub-bundles in advance. In the SMC manufacturing method according to the present invention, a fragmentation processing using a fragmentation processing apparatus (A) below is performed on chopped carbon fiber bundles before being deposited on a carrier film. The fragmentation processing apparatus (A) comprises a first pin roller and a second pin roller, each of which has a rotation axis parallel to a rotation axis direction of the rotary cutter. The first pin roller is rotationally driven such that its pins move downward from above on its side facing the second pin roller, and the second pin roller is rotationally driven such that its pins move downward from above on its side facing the first pin roller.
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公开(公告)号：US20220347890A1
公开(公告)日：2022-11-03
申请号：US17865288
申请日：2022-07-14
IPC分类号： B29B15/10
摘要： Provided is a useful improvement in a manufacturing method of a CF-SMC using a partially split continuous carbon fiber bundle. The manufacturing method of an SMC of the present invention includes (i) a step of drawing out a continuous carbon fiber bundle (10) from a package, the continuous carbon fiber bundle (10) having a filament number of NK and partially split into n sub-bundles in advance, (ii) a step of chopping the continuous carbon fiber bundle (10) drawn out from the package with a rotary cutter (234) into chopped carbon fiber bundles (20), and (iii) a step of depositing the chopped carbon fiber bundles (20) on a carrier film (41) traveling below the rotary cutter (234) to form a carbon fiber mat (30). In the manufacturing method, due to a fragmentation processing, in which at least some of the chopped carbon fiber bundles before being deposited on the carrier film (41) are fragmented by being brought into contact with a rotating body, a distribution of the filament number of the chopped carbon fiber bundles in the carbon fiber mat (30) is made different from that when the fragmentation processing is not performed.
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公开(公告)号：US20180257265A1
公开(公告)日：2018-09-13
申请号：US15973919
申请日：2018-05-08
摘要： Provided is a fiber-reinforced resin material molding in which fluctuations of the dispersion state of the fiber bundle in the molding is small, the generation of a resin pool is suppressed, and fluctuations in physical properties such as tensile strength and modulus of elasticity are suppressed; a method for manufacturing the same; and a method for manufacturing a fiber-reinforced resin material. Provided is a fiber-reinforced resin material molding comprising: a fiber bundle prepared by bundling a plurality of reinforcing fibers; and a matrix resin, wherein a coefficient of variation in fiber content of the reinforcing fibers per unit zone of 0.1 mm square on a cut face along a thickness direction is 40% or less.
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10.发明申请公开(公告)号：US20180250849A1
公开(公告)日：2018-09-06
申请号：US15970935
申请日：2018-05-04
CPC分类号： B29B15/122 , B29K2063/00 , B29K2307/04 , D02J1/18 , D02J3/02 , D10B2101/06 , D10B2101/12
摘要： Provided is a method for manufacturing a fiber-reinforced resin molding material having excellent productivity at low cost for manufacturing a fiber-reinforced resin molded article having excellent strength properties. Provided is a method for manufacturing a sheet-shaped fiber-reinforced resin molding material containing a plurality of cut fiber bundles and a resin impregnated between filaments of the cut fiber bundles, the method comprising an integrated material manufacturing step for obtaining an integrated material by collecting a sheet-shaped fiber bundle aggregate obtained by arranging and spreading a plurality of consecutive fiber bundles in a width direction.
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