Top > Search of International Patents > Method for laminating fiber-reinforced thermoplastic resin prepreg

Method for laminating fiber-reinforced thermoplastic resin prepreg UPDATE_EN meetings

Foreign code F190009882
File No. 2117
Posted date Aug 20, 2019
Country EPO
Application number 11765496
Gazette No. 2554348
Gazette No. 2554348
Date of filing Mar 28, 2011
Gazette Date Feb 6, 2013
Gazette Date Dec 20, 2017
International application number JP2011057579
International publication number WO2011125596
Date of international filing Mar 28, 2011
Date of international publication Oct 13, 2011
Priority data
  • P2010-080046 (Mar 31, 2010) JP
  • 2011JP57579 (Mar 28, 2011) WO
Title Method for laminating fiber-reinforced thermoplastic resin prepreg UPDATE_EN meetings
Abstract To provide a method for manufacturing a multi-layered near net shape for a mold product with improved yields of material, strength and rigidity. Prepreg tapes 1 of composite material comprised of thermoplastic resin and reinforced fibers are used to manufacture the near net shape, wherein the prepreg tapes 1 in a same layer are disposed in different directions based on the directions of fibers contained the prepreg tapes 1 and an outer force to be applied to the mold product, and wherein each prepreg tape 1 is placed and stitched by a suitable stitching method.
Scope of claims [claim1]
1. A method for laminating fiber-reinforced thermoplastic resin prepreg comprising: forming a flat layer made of a plurality of fiber-reinforced thermoplastic resin prepreg tapes (1) by means of a stitching process in which each fiber-reinforced thermoplastic resin prepreg tape (1) is placed on a sheet-shaped base material (3) at a desired position and direction, stitched thereto, and cut in a desired length;
forming at least another flat layer made of a plurality of fiber-reinforced thermoplastic resin prepreg tapes (1) by means of a subsequent stitching process in which each fiber-reinforced thermoplastic resin prepreg tape (1) is placed on the preceding flat layer made of the plurality of fiber-reinforced thermoplastic resin prepreg tapes (1) at a desired position and direction to thereby form a near net shape of plural layers having a predetermined shape.

[claim2]
2. The method of claim 1, wherein at least one of the following arrangements is used in forming a single layer or plural layers of fiber-reinforced thermoplastic resin prepreg tapes to provide required strength and rigidity to a mold product (2), the arrangements including:
arranging a longitudinal direction of fibers contained in the fiber-reinforced thermoplastic resin prepreg tapes (1) to be aligned with a direction of tensile strength to be applied to a mold product (2);
arranging the longitudinal direction of fibers (7) contained in the fiber-reinforced thermoplastic resin prepreg tapes (1) not to be perpendicular to the direction of tensile strength to be applied to the mold product (2);
arranging to provide fiber-reinforced thermoplastic resin prepreg tapes (1) to a portion or narrow portion nearby a section where a group of fiber-reinforced thermoplastic resin prepreg tapes (1) meets another group of fiber-reinforced thermoplastic resin prepreg tapes (1) whose fibers' longitudinal direction differs from fibers of the former prepreg tapes; and
arranging to provide fiber-reinforced thermoplastic resin prepreg tapes to a portion extending above or below a section where a group of fiber-reinforced thermoplastic resin prepreg tapes (1) meets another group of fiber-reinforced thermoplastic resin prepreg tapes (1) whose fibers' longitudinal direction differs from fibers of the former prepreg tapes.

[claim3]
3. The method of claim 1 or 2, wherein stitching is thoroughly applied by providing sewing threads with a small distance therebetween to the laminated fiber-reinforced thermoplastic resin prepreg tapes (1) on an area where detachment or deformation of layers is liable to be generated, in order to provide a mold product (2) having required strength and rigidity.

[claim4]
4. The method of claims 1, 2 or 3, wherein the sheet-shaped base material (3) is composed of the same thermoplastic resin as the resin included in the fiber-reinforced thermoplastic resin prepreg tapes (1), and is configured in a form of a plastic sheet, a plastic film, a cloth, a knit, a mat, a stitching sheet, or a desired combination thereof.

[claim5]
5. The method of claim 1, 2, 3 or 4, wherein the stitching process for the near net shape of a mold product (2) is performed by a embroidery sawing machine including a moving device for moving an object to be straightly stitched in the X- and Y-axis directions in accordance with a programmed control data including stitching sawing data, disposition data of prepreg tapes, and cutting position data.
  • Applicant
  • HIROSHIMA PREFECTURE
  • TOKAI INDUSTRIAL SEWING MACHINE CO., LTD.
  • Inventor
  • SHIMOHARA Ichiro
  • IKEDA Shin-ya
  • MATSUBA Akira
  • KONO Yosuke
  • NISHIDA Hironori
  • KONDOU Tetsuro
IPC(International Patent Classification)
Reference ( R and D project ) Hiroshima Prefectural Technology Research Institute

PAGE TOP

close
close
close
close
close
close