Filament winding device

Patent metadata

Field	Value
Publication number	US-2021237334-A1
Application number	US-201816757789-A
Country	US
Kind code	A1
Filing date	Sep 26, 2018
Priority date	Nov 10, 2017
Publication date	Aug 5, 2021
Grant date	—

Abstract

A filament winding device includes: a supporting unit that supports a mandrel on which a plurality of fiber bundles impregnated with a resin are wound, the supporting unit movable in the axial direction of the mandrel; and a helical unit having a plurality of fiber bundle guide units arranged radially in the circumferential direction of the mandrel and guide the corresponding plurality of fiber bundles to the mandrel, the helical unit supplying the plurality of fiber bundles to the mandrel through the fiber bundle guide units. Each of the fiber bundle guide units has a pressing roller for pressing a fiber bundle supplied to the mandrel, against the circumferential surface moving in the axial direction. The pressing roller can come into the contact with the circumferential surface of the mandrel and be rotationally driven about a roller axis extending in a roller axis direction perpendicular to the axial direction.

First claim

1 - 15 . (canceled)

16 . A filament winding device comprising:
a supporting unit able to support a mandrel on which fiber bundles impregnated with resin are wound and move in an axial direction of the mandrel; and a helical unit that includes fiber bundle guide units disposed radially in a circumferential direction of the mandrel and guide the fiber bundles to the mandrel, respectively, the helical unit supplying the fiber bundles to the mandrel via the fiber bundle guide units, each of the fiber bundle guide units including at least one pressing roller that presses the fiber bundle supplied to the mandrel on a circumferential surface of the mandrel moving in the axial direction, and the at least one pressing roller being passively rotatable about a roller axis extending in a roller axial direction orthogonal to the axial direction, by contacting the circumferential surface of the mandrel.

17 . The filament winding device according to claim 16 , wherein each of the fiber bundle guide units further includes a tension receiving member placed upstream of the at least one pressing roller in a fiber bundle running direction and receives tension of the fiber bundle not pressed on the mandrel yet.

18 . The filament winding device according to claim 17 , wherein, the tension receiving member is a roller.

19 . The filament winding device according to claim 16 , wherein the helical unit further includes a guide movement mechanism that moves each of the fiber bundle guide units in a radial direction of the mandrel.

20 . The filament winding device according to claim 16 , wherein the supporting unit is able to reciprocate in the axial direction,
each of the fiber bundle guide units includes two or more pressing rollers, as the two or more pressing rollers, a first pressing roller that presses the fiber bundle on the circumferential surface of the mandrel when the supporting unit moves toward one side in the axial direction, and a second pressing roller placed on the other side of the first pressing roller in the axial direction and presses the fiber bundle on the circumferential surface of the mandrel when the supporting unit moves toward the other side in the axial direction are provided.

21 . The filament winding device according to claim 16 , wherein the mandrel has a cylindrical shape extending in the axial direction, and
the at least one pressing roller includes, in cross section including an axis of the at least one pressing roller, a reduced diameter part curved so that the diameter decreases toward the center in the roller axial direction.

22 . The filament winding device according to claim 21 , wherein, in the at least one pressing roller, roller end parts are formed at outer sides of the reduced part in the roller axial direction, respectively, and
in the cross section of the at least one pressing roller, in a radial direction of the at least one pressing roller, the roller end parts are inside tangents to an outer edge of the reduced diameter part at ends in the roller axial direction, respectively, and an angle formed between each outer edge of the roller end parts and the outer edge of the reduced diameter part is an obtuse angle.

23 . The filament winding device according to claim 22 , wherein the roller end parts are rectangular in the cross section.

24 . The filament winding device according to claim 16 , wherein each of the fiber bundle guide units further includes
a roller supporter supporting the at least one pressing roller to be rotatable; and a guide supporter to which the roller supporter is attached, and the roller supporter includes a cushioning member absorbing variation of pressing force of pressing the at least one pressing roller on the mandrel.

25 . The filament winding device according to claim 24 , wherein the roller supporter includes, as the cushioning member, a plate spring member supporting the at least one pressing roller to be rotatable.

26 . The filament winding device according to claim 24 , wherein the roller supporter supports the at least one pressing roller at both sides.

27 . The filament winding device according to claim 20 , further comprising a controller controlling the supporting unit, and after the controller moves the supporting unit to the one side in the axial direction to stick the fiber bundles to reach an end portion on the other side from an end portion on one side in the axial direction of the mandrel, the controller moves the supporting unit further to the one side in the axial direction so that a part of each of the fiber bundles supplied to the mandrel juts out from the end portion on the other side of the mandrel, and
the controller moves the supporting unit back to the other side in the axial direction, in a state in which jut-out parts of the fiber bundles jutting out from the end portion of the mandrel are enclosed by an annular returning guide tool.

28 . The filament winding device according to claim 27 , wherein the returning guide tool is separated into guide pieces in a circumferential direction of the returning guide tool.

29 . The filament winding device according to claim 27 , wherein the returning guide tool is ring-shaped.

30 . The filament winding device according to claim 27 , wherein the maximum outer diameter of the returning guide tool is shorter than the outer diameter of the mandrel.

Assignees

• Murata Machinery Ltd

Inventors

• Tanigawa Motohiro
• Nakamura Daigoro
• Wada Hirotaka
• Uozumi Tadashi
• Shitamoto Hideo
• Nishida Tatsuhiko
• Goyude Masatsugu
• Matsuura Tetsuya
• Ikezaki Shu

Classifications

• B29C70/54

  Component parts, details or accessories; Auxiliary operations {, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing} · CPC title

• B29C53/58 Primary

  helically · CPC title

• B29C53/566 Primary

  for making tubular articles followed by compression · CPC title

• B29C70/32 Primary

  on a rotating mould, former or core · CPC title

• B29C53/8041

  Measuring, controlling or regulating (B29C53/665 takes precedence) · CPC title