CN-115427217-B - Method for manufacturing fiber-reinforced resin tube

Abstract

Provided is a method for manufacturing a fiber-reinforced resin pipe body, wherein the weight of the pipe body can be suppressed while ensuring a clearance in a die. The method for producing a fiber-reinforced resin tube comprises an arrangement step (S4, S5, S6), an expansion step (S8) and a molding step (S9), wherein the arrangement step (S4, S5, S6) is arranged on the outer peripheral surface of a mandrel by a filament winding method, the mandrel provided with a fiber body is arranged in a mold after the arrangement step (S4, S5, S6), the inside of the mandrel provided with the fiber body is pressurized in the expansion step (S8) to expand the mandrel 10, and the resin is supplied into the mold and impregnated into the fiber body and the impregnated resin 54 is cured in the molding step (S9) after the expansion step (S8), thereby molding the tube.

Inventors

• NAKAYAMA YOSHIHIRO
• SEN JIANYI

Assignees

• 日立安斯泰莫株式会社

Dates

Publication Date

20260512

Application Date

20200626

Claims (9)

1. 1. A method for manufacturing a fiber reinforced resin tube body is characterized in that, Comprising a configuration step, a repressurization step and a molding step, wherein, In the disposing step, a fibrous body is disposed on the outer peripheral surface of the cylindrical resin member by a filament winding method in a state in which the inside of the resin member is pressurized; After the disposing step, in the repressurizing step, disposing the resin member in which the fiber body is disposed in a mold, and pressurizing the inside of the resin member in which the fiber body is disposed, thereby repressurizing the resin member; After the repressurizing step, in the molding step, resin is supplied into the mold, the resin is impregnated into the fibrous body disposed on the outer peripheral surface of the resin-made member, and the impregnated resin is cured, thereby molding a tube.
2. 2. The method for producing a fiber-reinforced resin pipe body according to claim 1, wherein, After the molding step, the resin member remains as a core material of the pipe body.
3. 3. The method for producing a fiber-reinforced resin pipe body according to claim 1, wherein, The arrangement step may further include a first connection step of connecting a first connection member to one end of the resin member, In the disposing step, the fiber body is further disposed on an outer peripheral surface of the first connecting member.
4. 4. A method for producing a fiber-reinforced resin pipe body according to claim 3, wherein, The mold has a space for storing the resin injected into the mold at a connection portion of the resin member and the first connection member, In the molding step, the resin stored in the space is sucked out to impregnate the fiber body.
5. 5. A method for producing a fiber-reinforced resin pipe body according to any one of claims 1 to 4, wherein, In the disposing step, the fiber body is disposed by a multi-filament winding method.
6. 6. A method for producing a fiber-reinforced resin pipe body according to any one of claims 1 to 4, wherein, The resin member is a mandrel, and the arrangement step is preceded by a mandrel forming step of forming the mandrel having a convex portion corresponding to the concave portion on an outer peripheral surface thereof by using a die having the concave portion provided on an inner surface thereof.
7. 7. A method for producing a fiber-reinforced resin pipe body according to any one of claims 1 to 4, wherein, The resin member is a mandrel, and a second connecting step of connecting a second connecting member to the other end of the mandrel is further included before the disposing step, In the disposing step, the fiber body is further disposed on an outer peripheral surface of the second connecting member.
8. 8. A method for producing a fiber-reinforced resin pipe body according to any one of claims 1 to 4, wherein, The resin member is a mandrel, and in the repressurizing step, a fluid is circulated through the mandrel to pressurize the interior of the mandrel, The mandrel and the fibrous body are heated by the heat of the fluid.
9. 9. A method for producing a fiber-reinforced resin pipe body according to any one of claims 1 to 4, wherein, The fibrous body configured in the configuring step is a non-crimp structure.

Description

Method for manufacturing fiber-reinforced resin tube Technical Field The present invention relates to a method for manufacturing a fiber reinforced resin tube (fiber reinforced RESIN PIPE body) used as, for example, a propeller shaft of a vehicle. Background A propeller shaft (propeller shaft) mounted on a vehicle has a tube body extending in the front-rear direction of the vehicle, through which power generated by a prime mover and decelerated by a transmission is transmitted to a final deceleration device. As a tube body used for such a propeller shaft, there is a tube body made of fiber reinforced plastic made of a mandrel (mandril) (see patent document 1). In contrast, patent document 2 describes a method of winding a material around a mandrel, winding a resin-impregnated fiber body around the mandrel by a filament winding method (FILAMENT WINDING method), and curing the resin-impregnated fiber body by an autoclave treatment (autoclaving). Patent document 3 describes that a fibrous body not impregnated with resin is wound around a mandrel, and then the fibrous body is impregnated with resin in a die (mould). [ Prior Art literature ] [ Patent literature ] Patent document 1 Japanese patent laid-open publication No. Hei 3-265738 Patent document 2 Japanese patent laid-open publication No. 2003-127257 Patent document 3 Japanese patent laid-open publication No. Hei 8-323870 Disclosure of Invention [ Problem to be solved by the invention ] In the technique described in patent document 3, the fibrous body may be inserted into a mold. On the other hand, if it is desired to secure a clearance (clearance) in the mold in order to prevent the fibrous body from being inserted into the mold, the amount of resin supplied to the fibrous body increases by one clearance, and the weight of the finished pipe body may increase. The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method for manufacturing a fiber-reinforced resin pipe, which can ensure a gap in a die and suppress the weight of the pipe. [ Solution for solving the problems ] In order to solve the above-described problems, the method for producing a fiber-reinforced resin tube according to the present invention comprises a disposing step of disposing a fiber body on an outer peripheral surface of a resin mandrel by a filament winding method, an expanding step of disposing the fiber body in a mold and pressurizing an inside of the mandrel in which the fiber body is disposed after the disposing step, and a molding step of supplying a resin into the mold and impregnating the fiber body with the resin and curing the impregnated resin after the expanding step, thereby molding a tube. [ Effect of the invention ] According to the present invention, the gap can be ensured when the mandrel provided with the fibrous body is arranged in the mold, thereby preventing the fibrous body from being embedded in the mold. In addition, the expansion shape of the mandrel can be set appropriately according to the shape in the mold, and the increase in the amount of resin in the finished product of the fiber reinforced resin pipe body can be prevented, thereby suppressing the weight of the pipe body. Drawings Fig. 1 is a cross-sectional view schematically showing a fiber-reinforced resin tube according to a first embodiment of the present invention. Fig. 2 is a flowchart for explaining a method for manufacturing a fiber reinforced resin tube according to the first embodiment of the present invention. Fig. 3 is a schematic cross-sectional view for explaining a mandrel forming step, a first joining step, and a second joining step in a method for manufacturing a fiber reinforced resin tube body according to a first embodiment of the present invention. Fig. 4 is a schematic view for explaining an arrangement step of a method for manufacturing a fiber reinforced resin tube according to the first embodiment of the present invention. Fig. 5 is a schematic view for explaining an arrangement procedure of a method for manufacturing a fiber reinforced resin tube body according to the first embodiment of the present invention. Fig. 6 is a schematic view for explaining an arrangement step of a method for manufacturing a fiber reinforced resin tube according to the first embodiment of the present invention. Fig. 7 is a schematic cross-sectional view for explaining an in-mold setting step of the method for manufacturing a fiber reinforced resin tube body according to the first embodiment of the present invention. Fig. 8 is a schematic cross-sectional view for explaining an expansion step and a resin impregnation step of the method for manufacturing a fiber reinforced resin tube body according to the first embodiment of the present invention. Fig. 9 is a cross-sectional view schematically showing a fiber-reinforced resin tube according to a second embodiment of the present invention. Fig. 10 is a flowchart for explaining a