JPS61242835A - Manufacture of fiber reinforced plastic wheel - Google Patents

Abstract

PURPOSE:To enable an efficient mass production of wheels by providing mandrels upon which filament winding layers are formed in an arrangement like a rosary pressure-welded, and by heating and hardening, and by repeating continuous cutting and separation of individual winding layers. CONSTITUTION:Heat-hardening resin 28 coated filament 5 is wound on surfaces of mandrels 4 and winding layers 32 of desired thickness are formed. The mandrels on which the layers are formed as above are arranged in such a manner that the winding layer 32 on the side of the type 1 mold member 7 of one of the mandrels 4 is placed like a rosary pressure welded to the adjacent winding layer 32 on the side of the type 2 mold member 8 of the other mandrel, and heated and hardened. Subsequently, the type 1 FRP mold member portion is cut from the type 2 FRP mold member portion, and respective mandrels 4 are separated into the type 1 mold member 7 and the type 2 mold member 8 and released from the molds, resulting in simultaneous production of finished products of wheels in which the backs of the type 1 and type 2 FRP members are firmly stuck and integrated together.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing an FRP wheel, and particularly to a method for efficiently mass-producing wheels with excellent strength and rigidity.

(Prior Art) Automobile tires and wheels are generally manufactured from aluminum alloy, etc., but wheels made from FRP are being put into practical use in order to aim for further weight reduction.

By the way, as a conventional method for manufacturing FRP wheels, there is a method of press-molding short fibers such as carbon fiber impregnated with a thermosetting resin, but the so-called chopped fiber reinforced plastic molding obtained by this method Since the physical properties of the product are isotropic, it is difficult to obtain sufficient strength and rigidity. However, if you try to obtain sufficient strength and rigidity, the amount of short fibers used will naturally increase, which will increase the weight of the molded product, and there will be no advantage compared to products made of aluminum alloy or the like.

Therefore, as a method to ensure the strength and rigidity of a molded product, for example, as disclosed in Japanese Patent No. 56-120316, a filament coated with a thermosetting resin is wound around the surface of a mandrel to achieve a predetermined thickness. A filament winding molding method has been proposed in which a molded product is obtained by forming a winding layer, dividing the winding layer and separating it from a mandrel, and curing each separated winding layer by applying heat and pressure.

(Problem to be Solved by the Invention) However, in the conventional manufacturing method described above, since tension is applied to the filament, it is possible to obtain a molded product with sufficient strength and rigidity, but on the other hand, it is difficult to form a molded product on one mandrel. Since this method involves dividing and separating the winding layer into two, there was a problem in that a large number of molded products could not be obtained at the same time.

On the other hand, in Japanese Patent Application No. 59-208980, the present applicant used a mandrel having a shape in which the outer surfaces of two members matching the concave shapes on both sides of the wheel were joined together, and the surface of the mandrel was coated with thermosetting resin. A filament winding molding method in which a resin-coated filament is wound to form a winding layer, and after heating and hardening, it is separated at the above-mentioned joint and separated from the mandrel, and each separated winding layer is fixed back to back and assembled to form a wheel. is suggesting. However, this method also has the same problems as the conventional example above in terms of productivity, and because the separated molded products are assembled back-to-back and assembled into a wheel, the assembly process takes time and productivity is improved. It is difficult to do so, and there are also problems in securing the bonding strength.

In view of the above, the present invention has been made to improve the method proposed by the applicant, and its purpose is to regularly arrange a plurality of mandrels forming a filament winding layer under pressure in the form of beads. After that, adjacent winding layers are fixed to each other by heating and curing, and then each winding layer is divided and separated continuously to efficiently mass-produce FRP wheels with excellent bonding strength in a short time. It is in.

(Means for solving the fi problem) In order to achieve the above object, the solving means of the present invention provides a method for manufacturing an FRP wheel in which first and second substantially dish-shaped FRP members are fixed back to back. , first of all, the first
A plurality of mandrels are prepared in which first and second mold members for molding the second FRP member are removably joined at their respective maximum diameter outer surfaces. Then, a filament coated with a thermosetting resin is wound around the surface of each mandrel to form a winding layer of a predetermined thickness.

Next, the mandrels on which the winding layers have been formed are arranged in a beaded manner so that the winding layer on the first mold member side of one adjacent mandrel and the winding layer on the second mold member side of the other mandrel are in pressure contact with each other. In this state, the winding layer of each mandrel is heated and hardened. After that, the winding layer of each mandrel is divided into a first FRP member molding part and a second FRP member molding part, and then each mandrel is disassembled into a first mold member and a second mold member, and the mold is released from both mold members. By forcing FRP@
Multiple wheels are manufactured at the same time.

(Function) With the above configuration, in the present invention, a plurality of mandrels each having a winding layer formed thereon are arranged in a bead shape, and the winding layers of each mandrel are firmly fixed to each other by heating and curing the winding layer of each mandrel. After that, each winding layer is
When the P member molding part and the second FRPm @ molding part are separated, each mandrel is disassembled into the first mold member and the second mold member, and the molds are released from both mold members, the first and second FRP members are placed back to back. A plurality of FRP wheel molded products that are strongly fixed and integrated can be obtained at the same time, and therefore, FRP wheels with excellent bonding strength can be efficiently mass-produced.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a manufacturing line process for FRP wheels according to an embodiment of the present invention, in which 1 is a rectangular annular conveyance path consisting of two rails 2.2, 3 is a cart running along the conveyance path 1,
4 is a mandrel that is mounted on a truck 3 and conveyed along the conveyance path 1. A winding device 6 is provided at a predetermined position on the conveyance path 1 for winding the filament 5 around the surface of the mandrel 4 conveyed by the trolley 3.

As shown in FIG. 2, the mandrel 4 is constructed into an approximately abacus bead shape by assembling a first mold member 7 and a second mold member 8, each having a substantially truncated cone shape, by joining and assembling the outer surfaces of their respective maximum diameter parts. ing. Specifically, the first mold member 7 has a width dimension in the axial direction larger than that of the second mold member 8, has an insertion hole 9 penetrating through its center, and has a small diameter surface. An abutment part 10 having a hole communicating with the insertion hole 9 is formed in the center, while a protruding part 11 having a hole communicating with the insertion hole 9 in the center is provided on the large diameter surface. has been done. Further, a female threaded portion 12 is formed on the inner peripheral surface of the small diameter side of the hole of the small diameter side abutting portion 10 and the insertion hole 9 connected thereto, and a male screw portion 12 is formed on the outer peripheral surface of the large diameter side protrusion 11. A threaded portion 13 is formed. On the other hand, an insertion hole 1 corresponding to the insertion hole 9 of the first mold member 7 is provided at the center of the second mold member 8.
4 is penetrated therethrough, and a stepped portion 15 whose diameter is slightly smaller than that of the large diameter surface is formed on the large diameter side, while the small diameter surface communicates with the insertion hole 14 in the center. A stepped protrusion 16 having a hole is provided in a protruding manner. Further, a female threaded portion 17 is formed in the hole of the large-diameter side stepped portion 15 and the inner circumferential surface of the large-diameter side of the insertion hole 14 connected thereto, and the outer circumferential surface of the stepped protrusion 16 on the small-diameter side. has male thread part 1
8 is formed. Then, by screwing the threaded portion 13 of the large-diameter surface side protrusion 11 of the first mold member 7 into the female threaded portion 17 of the second mold member 8, both mold members 7°8 are fixed at their respective maximum diameter portions. Mandrel 4 that can be disassembled and joined together on the outer surface
is configured. At this time, a groove 19 is formed in the circumferential direction by the stepped portion 15 between both large diameter surfaces of both mold members 7.8. A plurality of mandrels 4 configured in this manner can be connected in a beaded manner as shown by the imaginary line by screwing together the female screw portion 12 of the first mold member 7 and the male screw portion 18 of the second mold member 8. ing.

Further, as shown in FIG. 3, the truck 3 includes a base 21 provided with four wheels 20 on the lower surface, a support 22 erected on the base 21, and an upper part of the support 22. A rotating shaft 24 that protrudes horizontally and has a male threaded portion 23 at its tip, and a mandrel 4 that is attached to the rotating shaft 24 as shown in an imaginary line through an insertion hole 9° 14 are attached to the rotating shaft 24. It also includes a locking nut 25 for fixing.

Further, the winding device 16 includes a rotational torque transmission mechanism 26 that transmits rotational torque to the rotational shaft 24 of the truck 3.
and a reel 2 wound with filament 5 such as carbon fiber.
7, a tank 29 containing a thermosetting resin 28 such as an epoxy resin, and a thermosetting resin 28 in the filament 5.
The filament 5 is reciprocated in the axial direction in synchronization with a plurality of rollers 30 that guide the filament 5 into the tank 29 for coating, and the mandrel 4 rotated by the rotational torque transmission mechanism 26. Reciprocating mechanism 31
It will be equipped with.

That is, it is mounted on the trolley 3 and the rotating shaft 2 is fixed with the locking nut 25.
The mandrel 4 fixed to the mandrel 4 is transported to the position of the winding device 6 by the carriage 3 traveling on the transport path 1. Then, the traveling of the trolley 30 is stopped, and the male screw portion 24 of the rotating shaft 24 is screwed and connected to the rotating torque transmitting mechanism 26 of the winding device @ 6, and the rotating torque of the rotating torque transmitting mechanism 26 is transmitted to the rotating shaft 24. At the same time as the mandrel 4 is rotated, the reciprocating mechanism 31 is synchronized with this rotation.
As shown in FIGS. 4 and 5, the filament 5 is wound around the outer peripheral surface of the mandrel 4 in a series in a substantially radial and intersecting manner while applying tension until it reaches a predetermined thickness.

As a result, a winding layer 32 is formed on the surface of the mandrel 4.
is formed. In this way, windings [32] are sequentially formed on the plurality of mandrels 4 conveyed by the cart 3, and the mandrels 4 are conveyed downstream in the conveyance direction.

Furthermore, 33 is the winding layer 3 of the mandrel 4.
2, a heating device provided downstream in the conveyance direction to heat and harden the winding layer 32;
A cutting device 35 is installed on the downstream side of the heating device 33 to separate the fibers into a first FRP member forming section and a second FRP member forming section; 35 is the heating device 33 and cutting device &34;
This is a carrying device that sequentially carries in a plurality of mandrels 4 each having a winding layer 32 formed thereon.

The carry-in bag @35 includes a shaft 36 disposed to pass through the heating device 33 and the cutting device 34, and the shaft 3.
A pair of left and right support stands 37 that horizontally support the mandrel 4 and the mandrel 4 set on the shaft 36 are heated by a heating device 133.
A carrying means 38 which moves the windings 1I132 formed on adjacent mandrels 4 to the side and presses them against each other to connect them in a beaded manner; and the mandrels carried by the carrying means 38 and which have finished heating hardening and cutting the windings 1I132. 4 is separated and carried out one by one.

That is, a plurality of mandrels 4 on which winding layers 32 have been sequentially formed by the winding device 6 are transported downstream in the transport direction and set on the shaft 36 of the carry-in device 35. At this time, the winding layer 32 on the first mold part @7 side of one of the adjacent mandrels 4 and the winding layer 1132 on the second mold member 8 side of the other mandrel 4
A plurality of mandrels 4...
are regularly arranged facing the same direction, and the male threaded portion 18 provided on the stepped protrusion 16 of the second mold member 8 of one mandrel 4 is inserted into the first mold member 8 of the other mandrel 4 using the carrying means 38.
The winding layers 32 of adjacent mandrels 4 are pressed together by screwing into the female screw portion 12 provided in the insertion hole 9 of the mold member 7,
As shown in FIG. 6, a plurality of mandrels 4 are connected in a beaded manner.

The plurality of connected mandrels 4... are sequentially carried into the heating device [33] by the carrying means 38, and after heating and hardening the windings 1132... of each mandrel 4..., the cutting device 34 The windings and grooves 1132 of each mandrel 4 are cut with a cutter 40. This cutting point corresponds to the groove 19 of the mandrel 4, as shown by the broken line in FIG.
As shown in the figure, it is divided into a first FRP member molding section and a second FRP member molding section. After dividing, each mandrel 4...
The screwing state of the male threaded part 13 of the protruding part 11 of the first mold member 7 and the female threaded part 17 of the insertion hole 14 of the second mold member 8, which are assembled into one mandrel 4 by the carrying out means 39, is confirmed. The mold members 8 of one adjacent mandrel 4 and the first mold member 7 of the other mandrel 4 were separated into a shape in which they were connected back to back, and transported one by one from the carrying bag W135. After that, the mandrel 4 is attached to the first mold member 7 and the second mold member 8.
By separating the winding layer 32 into two mold members 7.8 and releasing the winding layer 32 from both mold members 7.8, first and second FRP members 41, 42 which are substantially dish-shaped and have different shapes as shown in FIGS. 7 and 8 are formed. F is firmly fixed and integrated back to back.
A large number of RP wheels 47 are molded at the same time.

The FRP wheel 47 formed in this manner has the outer periphery of the disk portions 41a, 42a secured to bolts and nuts 43... At the same time, the disk portion 41a is fastened.

A sealing material 44 made of an elastic material such as rubber is applied to the outer peripheral edge of the joint portion 42a.

In addition, at the center of the disk parts 41a and 42a, at the base of the abutting part 10 of the first mold member 7 of the mandrel 4 and the stepped protrusion part 16 of the second mold member 8 that abuts with the abutting part 10, An axle insertion hole 45 is formed. In addition, the axle insertion hole 45
A plurality of mounting holes 46 to the axle are post-processed on the outer periphery of the axle.

On the other hand, the winding layer 32 (FRP wheel)
The first and second mold members 7°8 that have been removed are again joined at their respective maximum diameter outer surfaces to form one mandrel 4 as shown in FIG. In the process of loading and transporting the transport path 1, the winding device 6
winding of the filament 5, heating hardening of the winding layer 32 formed by this winding with the heating device 33 (fixing and integrating adjacent windings 1132), and cutting the first winding layer 32 with the cutting device i34.
By repeating the above steps of dividing into an FRP member molding part and a second FRP member molding part, and releasing the winding layer 32 (FRP@Wheel) from the first and second mold parts @7.8, the FRP wheel is made. Subject to continuous production.

Therefore, in the method for manufacturing an FRP wheel of the above embodiment, a plurality of mandrels 4 with windings 1132 formed thereon are connected to the winding layer 32 on the first mold member 7 side of one mandrel 4 and the winding layer 32 on the first mold member 7 side of one mandrel 4 adjacent to each other. After the windings 12132 on the second mold member 8 side of the mandrel 4 are arranged in a bead shape so as to be in pressure contact with each other, the adjacent winding layers 32 are fixed and integrated by heating and curing, and then the windings 1132 are attached to the first FRP member. It is divided into a molding part and a second FRP member molding part, and each mandrel 4 is disassembled into a first mold part @7 and a second mold member 8, and the mold parts are released from both mold members 7 and 8. Therefore, at the same time as the winding 1132 is cured, the plural mandrels 4...
Since each of the winding layers 32... can be fixed and integrated, the mandrel 4 can be attached one by one as in the conventional method.
It is no longer necessary to divide the winding layer 32 formed in the above and to perform the subsequent reversal fixing operation, and the winding layer 32 can be easily divided into the first FRP member molded part and the second FRP member molded part, resulting in excellent strength and rigidity. FR
A plurality of wheels 47 made of P can be efficiently mass-produced at the same time.

In addition, during the heat curing process of the winding layer 32, the first F
Since the RP member molding part and the second FRP member molding part are firmly fixed and integrated, it is possible to obtain an FRP wheel with excellent bonding strength between the first FRP member 41 and the second FRP member 42.

(Effects of the Invention) As explained above, according to the method for manufacturing an FRP@wheel of the present invention, a plurality of mandrels are arranged in a beaded manner and the winding layer formed on each mandrel is pressure-welded, and then heated and hardened. The winding layer of each mandrel, which is connected and fixed together at the first FRP member forming part and the second FR
FRP with excellent strength and rigidity can be easily operated by separating it into the P member molding part and releasing it from the mold, which eliminates the conventional trouble of reversing and joining after separating and releasing the mold! JJ wheels can be manufactured continuously and efficiently, and mass production can be achieved. Moreover, since the winding layers of adjacent mandrels are fixed and integrated at the same time as the winding layer of the mandrel is heated and hardened, it is possible to obtain an FRP wheel with excellent bonding strength.

[Brief explanation of drawings]

1 to 8 show embodiments of the present invention, FIG. 1 is a general schematic diagram explaining the manufacturing process, FIG. 2 is a vertical sectional side view of the mandrel, FIG. 3 is a side view of the cart, Fig. 4 is a front view of the mandrel with a winding layer formed thereon, Fig. 5 is a partial longitudinal side view of the same portion, and Fig. 6 is a partial longitudinal side view showing a state in which a plurality of mandrels with winding layers formed are arranged in a bead shape. Figures 7 and 8 are F
It is a front view and a partial vertical side view of a wheel made from RP. 4... Mandrel, 5... Filament, 7...
1st mold member, 8... 2nd mold member, 28... thermosetting resin, 32... winding layer, 41... 1st F
RP member, 42... second FRP member.

Claims (1)

[Claims] (1) A method for manufacturing an FRP wheel in which first and second substantially dish-shaped FRP members are fixed back to back, wherein the first and second mold members for molding the first and second FRP members are each A plurality of mandrels are prepared, each of which is removably joined at the outer surfaces of the largest diameter portions, and a filament coated with a thermosetting resin is wound around the surface of each mandrel to form a winding layer of a predetermined thickness. Next, the mandrels on which the winding layers have been formed are arranged in a beaded manner so that the winding layer on the first mold member side of one adjacent mandrel and the winding layer on the second mold member side of the other mandrel are in pressure contact with each other. Then, the winding layer of each mandrel is heated and hardened, and then the winding layer of each mandrel is bonded to the first FRP member forming part and the second FRP member forming part.
The method is characterized in that a plurality of FRP wheels are manufactured at the same time by separating each mandrel into a first mold member and a second mold member and releasing the mold from both mold members. A manufacturing method for FRP wheels.