Device for automatically layering prepreg sheets and method for layering prepreg sheets

Patent metadata

Field	Value
Publication number	US-2016243769-A1
Application number	US-201415026489-A
Country	US
Kind code	A1
Filing date	Nov 5, 2014
Priority date	Nov 6, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

The present invention has a cooling unit ( 29 ) as a temperature gradient formation unit for forming a temperature gradient in which the temperature is lowered in the direction from one surface ( 18 a ) of a semi-cured prepreg sheet ( 18 ) layered on a top surface ( 12 a ) of a layered body ( 12 ) toward the other surface ( 17 b ) of a release sheet ( 17 ), in a first region (C 1 ) of a layered sheet ( 16 ) located upstream from a first roller ( 52 ).

First claim

1 - 10 . (canceled)

11 . A device for automatically layering prepreg sheets, the device forming a prepreg layered body by layering a plurality of semi-cured prepreg sheets, each of the semi-cured prepreg sheets being formed of a fiber sheet impregnated with resin, the device comprising:
a first roller which presses a layered sheet including a release sheet and the semi-cured prepreg sheet attached to one surface of the release sheet, from an other surface of the release sheet so as to layer the semi-cured prepreg sheet forming the layered sheet on a top surface of a layered body formed of one or more layers of semi-cured prepreg sheets; a second roller arranged downstream from the first roller, the second roller guiding the release sheet in a direction in which the release sheet is peeled off from the semi-cured prepreg sheet layered on the top surface of the layered body; and a temperature gradient formation unit which forms a temperature gradient in a predetermined region of the layered sheet located upstream from the first roller such that the temperature is lowered in a direction from one surface of the semi-cured prepreg sheet layered on the top surface of the layered body toward the other surface of the release sheet, wherein the predetermined region includes a first region, and the temperature gradient formation unit is a cooling unit which cools the release sheet located in the first region from the other surface side of the release sheet.

12 . The device for automatically layering prepreg sheets according to claim 11 ,
wherein the cooling unit blows cold air to the other surface of the release sheet located in the first region.

13 . The device for automatically layering prepreg sheets according to claim 11 , further comprising:
a first heating unit, wherein the predetermined region includes a second region located upstream from the first region, and the first heating unit heats the semi-cured prepreg sheet from the one surface side of the semi-cured prepreg sheet located in the second region.

14 . The device for automatically layering prepreg sheets according to claim 11 , further comprising:
a second heating unit which heats the layered body located upstream from the first roller.

15 . A method for layering prepreg sheets in which a prepreg layered body is formed by layering a plurality of semi-cured prepreg sheets, each of the semi-cured prepreg sheets being formed of a fiber sheet impregnated with resin, the method comprising:
a layering step of pressing a layered sheet including a release sheet and the semi-cured prepreg sheet attached to one surface of the release sheet, from an other surface of the release sheet with a first roller so as to layer the semi-cured prepreg sheet forming the layered sheet on a top surface of a layered body formed of one or more layers of semi-cured prepreg sheets; a peeling-off step of peeling off the release sheet from the semi-cured prepreg sheet layered on the top surface of the layered body with a second roller arranged downstream from the first roller after the layering step; and a temperature gradient formation step of forming a temperature gradient in a predetermined region of the layered sheet located upstream from the first roller such that the temperature is lowered in a direction from one surface of the semi-cured prepreg sheet layered on the top surface of the layered body toward the other surface of the release sheet before the layering step, wherein, in the temperature gradient formation step, the release sheet located in the first region of the predetermined region is cooled from the other surface side of the release sheet.

16 . The method for layering prepreg sheets according to claim 15 ,
wherein, in the temperature gradient formation step, cold air is blown to the other surface of the release sheet located in the first region.

17 . The method for layering prepreg sheets according to claim 15 ,
wherein, in the temperature gradient formation step, the semi-cured prepreg sheet located in a second region arranged upstream from the first region of the predetermined region is heated from the one surface side of the semi-cured prepreg sheet.

18 . The method for layering prepreg sheets according to claim 15 ,
wherein, in the temperature gradient formation step, the layered body located upstream from the first roller is heated.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Shibutani Takashi
• Tsuruta Megumu
• OWATARI Kosuke
• Ueda Toshikazu
• YAMASAKI Yukiharu

Classifications

• B29C70/388 Primary

  Tape placement heads, e.g. component parts, details or accessories · CPC title

• B29C70/06

  Fibrous reinforcements only · CPC title

• B29L2031/3082

  Fuselages · CPC title

• B29C70/386 Primary

  Automated tape laying [ATL] · CPC title

• B29C33/68

  Release sheets · CPC title