JPS61202826A - Manufacture of frp component - Google Patents

Abstract

PURPOSE:To contrive drastic reduction in manufacturing process, by a method wherein an inside flexible mandrel is made to deform on a mold surface of a molding tool and hot press molding of a filament winding molded layer of the external surface is performed into a predetermined form. CONSTITUTION:A mandrel 1 is constituted into an external form which makes a surface area of a molded layer based on filament winding molding and that of a molded article after hot press molding almost correspond. A filament 5 coated with thermosetting resin 8 is wound round the external surface of a mandrel 1 in order and a filament winding molded layer 12 is formed. The mandrel 1 having the molded layer 12 is arranged on a molding tool 17 consisting of a top force 15 provided with mold surfaces 13, 14 almost corresponding to a final molded article form and a bottom force 16 and resin 8 is made to cure by performing hot press molding of a molded layer 12. With this construction, wheel discs 18, 19 made of FRP, which are obtained by covering the upper part of the mandrel 1 deformed into the final molded article form with the molded layer 12 can be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing FRP8B41, for example, for manufacturing wheel disks of automobile tires and wheels.

(Prior Art) Conventionally, as a method for manufacturing FRP (fiber reinforced plastic) members, for example, the method described in Japanese Patent Application Laid-Open No. 120316/1983 is known.

That is, a mold release agent is applied to the outer surface of a spherical hard mandrel that cannot be deformed, and this mandrel is attached to a rotating shaft.
A filament coated with a thermosetting resin is wound around the outer surface of a rotating mandrel to perform filament winding molding, the above-mentioned filament winding molding layer is then divided into two, the inner mandrel is removed, and the mandrel is further removed. By heating and pressurizing the filament winding molding layer to harden it, FR
This is a method of manufacturing a P member.

However, the conventional manufacturing method described above requires a step of applying a mold release agent to the outer surface of the mandrel, a step of dividing the filament winding molding layer into two, and a step of removing the mandrel from the filament winding molding layer after dividing. Therefore, there was a problem that the number of manufacturing steps was increased.

In addition, the conventional manufacturing method has the following problems.

In other words, if a recess is provided in the hard mandrel itself,
Holes are created in the filament winding layer during filament winding in this area, and the winding is performed with air being mixed into the above-mentioned recesses.Furthermore, in this area, the force acting on the filament toward the inside of the mandrel is weak and the filament density decreases. Therefore, a strong FRP member cannot be obtained, and this method cannot be applied to a manufacturing method of an FRP member having a complicated product shape.

(Objective of the Invention) An object of the present invention is to provide a method of manufacturing an FRP member that can significantly reduce the number of manufacturing steps by using a flexible mandrel.

(Structure of the Invention) This invention is a process of rotating a flexible mandrel attached to a rotating shaft and winding a filament coated with a thermosetting resin on the outer surface of the mandrel to form a filament winding. and placing a flexible mandrel with a filament winding molding layer in a mold with a molding surface that substantially corresponds to the final molded article shape,
The method for manufacturing an FRP member includes the steps of deforming the internal flexible mandrel on the molding surface of the mold, hot press molding the filament winding molding layer on the outer surface into a predetermined shape, and curing the resin. It is characterized by

(Effect of the invention) According to this invention, by using a flexible mandrel,
Since the finished product is made with the mandrel remaining inside the molded product, the conventional mold release agent application process, filament winding layer division process, and mandrel removal process are completely unnecessary, resulting in a significant reduction in manufacturing processes. It becomes possible to achieve this goal.

In addition, if the flexible mandrel before deformation is set to an external shape that approximately corresponds to the surface area of the molded layer formed by filament winding molding and the surface area of the molded product after hot press molding, the filament will not loosen. Therefore, it is strong and can be applied to the production of FRPIS materials whose product shape has complex irregularities.

(Example) An embodiment of the present invention will be described in detail below based on the drawings.

The drawings show a method for manufacturing FRP members, and in Fig. 1,
Reference numeral 1 denotes a flexible mandrel made of foamed urethane or the like, and this mandrel 1 is configured to have an external shape that makes the surface area of the molded layer formed by filament winding molding approximately correspond to the surface area of the molded product after hot press molding, which will be described later. There is.

The above-described flexible mandrel 1 is attached to a rotating shaft 2, and a drive source 3 such as a motor is connected to the rotating shaft 2.

4 is a bobbin, and a filament 5 made of reinforcing fiber such as carbon fiber or glass fiber is wound around the outer periphery of the bobbin 4. The filament 5 is sequentially fed out from the bobbin 4 described above and is coated with resin by a plurality of rollers 6. It is configured to lead to tank 7.

A thermosetting resin 8 is stored in the resin tank 7 described above,
The above-mentioned filament 5 is once guided into this resin tank 7 by the above-mentioned rollers 6, and while the travel of the filament 5 is guided by the rollers 9.9 in the tank, the filament 5 is
The structure is such that the thermosetting resin 8 is coated on the surface.

The filament 5 coated with resin in this manner is led out of the tank 7 again and subjected to winding via the rollers 10, 10 and the delivery eye 11.

The above-mentioned delivery eye 11 is located above the mandrel 1 and reciprocates in a direction parallel to the rotating shaft 2, so it drives the drive source 3 to continuously move the flexible mandrel 1 attached to the rotating shaft 2 in a fixed direction. Then, the filament 5 coated with the thermosetting resin 8 is sequentially wound around the outer surface of the mandrel 1 to perform filament winding.

In this winding, the filament 5 is applied so that the rotation axis 2 is the turning point, and the filament 5 is oriented such that it extends radially from the center of the outer surface of the mandrel 1.

By performing filament winding molding in this manner, a filament winding molding layer 12 is formed on the outer surface of the mandrel 1 as shown in FIGS. 1 and 2.

Next, the above-mentioned filament winding molding [112
The flexible mandrel 1 has a final molded product shape as shown in FIG. 2, and a molding surface 13, 14 that substantially corresponds to the shape (the shape is omitted in FIG. 2 for convenience of illustration). It is placed in a mold 17 consisting of an upper mold 15 and a lower mold 16.

Next, the above-mentioned upper mold 15 is moved downward to deform the inner flexible mandrel 1 on the molding surface 13.14 of the mold 17, while the filament winding molding layer 1 on the outer surface
2 is hot press molded into a predetermined shape, and the resin 8 is cured.

In this way, by selecting the molding surfaces 13 and 14 described above, the FRP wheel disc 18 having a corner corner as shown in FIGS. 3 and 4 and the FRP wheel disc 18 having an uneven portion as shown in FIG. wheel disc 19
can be manufactured.

That is, the flexible mandrel 1 remains inside in a deformed state corresponding to the final molded product shape, and the thermoset filament winding molding layer 1 is placed on this mandrel 1.
An FRP wheel disc 18,19 covered with 2 can be manufactured.

When manufactured by such a method, the steps of applying a mold release agent, dividing the filament winding molding layer, and removing the mandrel as in the conventional example are not required at all, so that the number of manufacturing steps can be significantly reduced.

In addition, if the flexible mandrel 1 before deformation is set to an external shape that substantially corresponds to the surface area of the molded layer formed by filament wine disk molding and the surface area of the molded product after hot press molding, complex unevenness will be created in the product shape. Even if there is, the filament density will not decrease in any way, and there will be no slack in the filament.
It can also be applied to the production of FRP members with strong product shapes and complex shapes.

In addition, although the above embodiment has been described using a wheel disk as an example of the FRP member, the present invention is not limited to this.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, Fig. 1 is a system diagram showing a method for manufacturing an FRP member, Fig. 2 is a schematic diagram showing a hot press molding process of an FRP member, and Fig. 3 is a perspective view of a final molded product. 4 is a sectional view taken along the line IV--IV in FIG. 3, and FIG. 5 is a sectional view showing another example of the final molded product. 1... Flexible mandrel 2... Rotating shaft 5... Filament 8... Thermosetting resin 12... Filament winding molding layer 13. 14... Molding surface 17... Molding mold No. Figure 1 □ Three Yoo and 4th Figure 1-Ha 15 Uni = Su ζ; = One convex sixty one et al.

Claims (1)

[Claims] 1. Rotating a flexible mandrel attached to a rotating shaft,
A step of winding a filament coated with a thermosetting resin on the outer surface of the mandrel to perform filament winding molding, and a step of forming a flexible mandrel having a filament winding molding layer on a molding surface that substantially corresponds to the shape of the final molded product. the process of curing the resin by heat press-molding the filament winding molding layer on the outer surface into a predetermined shape by deforming the internal flexible mandrel on the molding surface of the mold; A method for manufacturing FRP members. 2. The flexible mandrel before deformation is configured to have an external shape that substantially corresponds to the surface area of the molded layer formed by filament winding molding and the surface area of the molded product after hot press molding. A method for manufacturing FRP members.