JPH0410409B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for forming a beam-like body made of FRP.

When forming a beam-like body a such as a rectangular plate-like leaf spring illustrated in Fig. 1 from FRP, conventionally the second
A groove mold 1 and a plurality of presser molds 2 as shown in the figure were used. That is, the groove 1 has a polygonal shape that is rotatably supported around the central axis 3 (the supporting structure is omitted), the length of one side is approximately equal to the length of the beam-like body a, and the outer periphery has a A circumferential groove 4 whose cross-sectional shape is the same as that of the beam-like body a is formed. Further, the holding die 2 is provided to cover the groove 4, and is detachably fixed to the outer circumference of the groove die 1 via a plurality of bolts 5 disposed in the circumferential direction. The above beam-like body a
When molding, while rotating the groove die 1 with the presser die 2 removed, the FRP material 6, which is a reinforcing fiber bundle impregnated with synthetic resin, is inserted into the groove 4 and wound until the desired thickness ( After reaching the length t with only one winding, the holding mold 2 is fixed with bolts 5, and the heating means (not shown) installed in the furnace or in the groove mold 1 is fixed. ) by FRP material 6
Heat and harden. After hardening, bolt 5...
Then, the holding die 2... was removed, and the beam-like body was taken out from the groove die 1 by cutting at the ridge 7.... Therefore, it is necessary to repeatedly attach and detach a large number of bolts 5, which is disadvantageous in that it requires a lot of effort.

The present invention was made under the above circumstances, and its purpose is to make it simple and easy to attach and detach the presser die, thereby improving productivity, and furthermore, to improve productivity in the groove.
The resin can be cured into a precise shape while pressing the FRP material correctly and reliably in the thickness direction.
An object of the present invention is to provide a method and apparatus for forming a beam-like body made of FRP.

The present invention provides a method for displacing the presser die in the above direction with respect to the groove die by a protrusion projecting in a direction parallel to a line segment toward the rotation center of the groove die and a concave portion fitting into the protrusion. In addition to being supported freely, this presser die is pressed in a direction parallel to the line segment toward the center of rotation of the groove die, so that when molding a beam-like object, the presser die that covers the groove can be pressed against the groove die as desired. Correct molding can be achieved by reliably pressing in the thickness direction with a pressing force of Therefore, in the preparation stage, the presser die can be easily and easily attached and detached, and productivity can be greatly improved.

Hereinafter, the present invention will be described with reference to an illustrated embodiment. In FIGS. 3 and 4, the mold 10 includes a groove mold 11 and a plurality of press molds 12. As shown in FIGS.
The groove mold 11 is rotatably supported around the central axis 13 (the supporting structure is omitted) and has a polygonal shape (the figure shows a regular hexagonal shape), and the length of one side is the same as the desired beam-like body a.
A circumferential groove 14 is formed in the outer circumferential portion and has a length substantially equal to that of the beam-like body a and a cross-sectional shape that is the same as that of the beam-like body a. Further, the presser die 12 has a flat plate shape, for example,
They are provided on each side of the groove mold 11 so as to cover the grooves 14. At least one of the groove die 11 and the presser die 12, for example, the groove die 1
1 has a protruding portion 15 such as a pin that protrudes in a direction perpendicular to each side, that is, in a direction parallel to a diametrical line segment toward the central axis 13 of the groove mold 11 (see FIG. 4). ) is provided in a protruding manner, and on the other hand, a concave portion 16 such as a hole into which a protruding portion 15 can be slidably fitted is formed in the presser mold 12 . These protruding portions 15 and concave portions 16 fit together to support the holding die 12 so as not to be displaced in any direction other than the radial direction of the groove die 11. moreover,
A plurality of pressing means 17 are disposed in the circumferential direction on the outer periphery of the mold 10. In the illustrated example, the pressing means 17 includes a rotary cylinder device 18 and a presser mold 12.
A holding member 1 such as a roller that contacts the outer surface of the
9, and an arm member 20 etc. that connects these both 18 and 19, and regardless of the rotation of the mold 10, the presser mold 12 is moved relative to the groove mold 11 in a direction parallel to the line segment toward the central axis 13. It is beginning to be oppressed. The rotary cylinder device 18 is preferably driven by a gas such as air, but may be driven by a liquid such as oil. Furthermore, by using an appropriate link mechanism in place of the arm member 20, a direct-acting type cylinder device may be used instead of the rotary type. Alternatively, in place of these cylinder devices, a spring member such as a spiral spring or other appropriate pressure mechanism may be used.

When forming an FRP beam using the apparatus configured as described above, the pressing means 17 is operated to displace the pressing member 19 outward, and the groove is formed with the pressing mold 12 removed. While rotating the mold 11, as in the conventional example, an FRP material (which may be a semi-hardened material) in which reinforcing fibers are impregnated with a synthetic resin is inserted into the groove 14 and wound (it may be done only once). ) When the desired thickness is reached or after inserting the FRP material of the desired thickness into the groove 14, the protrusion 1
5 and the concave portion 16 are fitted, and the presser mold 1 is
2 is supported by the groove mold 11, and the presser member 19 is pressed against the presser mold 12 by operating the pressing means 17.
In this state, while rotating the mold 10 at a desired speed, the FRP material is heated and hardened using a heating means (not shown) provided in the furnace or the mold 10 itself. When the curing is completed, the pressing means 17 is released, the holding die 12 is removed, and the beam-shaped body a is removed by cutting at the ridge 21 in the same manner as described above.

According to the above configuration, the presser die 11 is supported so as to be freely displaceable in the radial direction relative to the groove die 12, and is elastically pressed toward the center by the pressing means 17. Regardless of the rotation of the FRP material, the desired pressure can be applied almost uniformly to the FRP material. Furthermore, if necessary, it is also possible to arbitrarily adjust the pressing force during the curing process. Therefore, even if the material shrinks during curing, the required pressure can be maintained, so the generation of bubbles and cracks can be effectively prevented and a beam-shaped body of good quality can be obtained. I can do it.
Furthermore, since the attachment and detachment of the presser mold 12 is significantly simpler than bolt tightening, productivity can be greatly improved.

Note that the present invention is not limited to the above embodiments. For example, as illustrated in FIGS. 5A to 5C, the cross-sectional shape of the beam-like body can be appropriately set as necessary, and the cross-sectional shape may change in the longitudinal direction, or it may be curved. . Further, the presser mold 12 is not limited to a flat plate, and if the outer peripheral portion is formed in an arc shape as illustrated in FIG. 6, smooth operation during rotation can be achieved. Furthermore, by curving each side of the groove die 11 and the presser die 12, a curved FRP beam-like body can be formed. If necessary, a protrusion 22 is provided on the presser die 12 as illustrated in FIG.
4, and by configuring it in this way, even if the beam-like body a contracts when it hardens, it is always pressed with a constant pressing force, so that the quality can be further improved. It is also possible to have these protrusions 22 and grooves 14 instead of the protrusions 15 and recesses 16. moreover,
Instead of disposing the holding mold 12 and the pressing means 17 around the entire circumference of the groove mold 11, they may be provided partially around the 1/2 or 1/3 circumference of the groove mold 11. If configured in this way, the FRP material When the curing time is short, it is possible to form a beam-like body continuously. It goes without saying that various other modifications and applications can be made within the scope of the gist of the present invention.

As described above, according to the present invention, the resin can be cured in the groove while the FRP material is properly pressed in the thickness direction with a desired pressing force using the groove die and the presser die. It is possible to mold the body into an accurate cross-sectional shape, and it is also possible to prevent cracks and bubbles from forming in the beam-like body. In addition, the presser die can be attached and detached simply and easily, and productivity is greatly improved.

[Brief explanation of drawings]

Figure 1 is a perspective view illustrating an FRP beam-like body, Figure 2
The figure is a side view showing a conventional example, Fig. 3 is a side view showing an embodiment of the present invention, Fig. 4 is a sectional view taken along the - line in Fig. 3, and Fig. 5 A, B, and C are FRP beams. 6 is a partial side view showing a modification of the present invention, and FIG. 7 is a sectional view showing a modification of the main part. 10...Molding mold, 11...Groove mold, 12...Press die, 13...Center axis line, 14...Groove, 15...
Protruding portion, 16... Concave portion, 17... Pressing means, 1
8... Rotating cylinder device, 19... Pressing member,
20...Arm member.

Claims (1)

[Scope of Claims] 1. An FRP material in which a fiber bundle is impregnated with a synthetic resin material is inserted into a circumferential groove provided on the outer periphery of a freely rotatable groove shape, and the FRP material is inserted into the groove shape. At the same time, the FRP material is heated while being covered with a presser die from the outside, and the presser die is supported so as to be freely displaceable in a direction parallel to a line segment toward the rotation center of the groove die with respect to the groove die. At the same time, the method for forming a beam-like body made of FRP is characterized in that the resin material is cured while the presser mold is pressed in a direction parallel to a line segment toward the rotation center of the groove mold. 2. A groove type that is rotatably supported and has grooves continuously provided in the circumferential direction on the outer periphery around which an FRP material made of fiber bundles impregnated with a synthetic resin material can be wrapped, and an outer periphery of this groove type. a plurality of presser molds located in the area and extending in the circumferential direction of the groove mold and arranged in plurality in the circumferential direction to cover the groove; a heating means for curing the FRP material; and the groove mold and the presser mold. a protrusion provided on at least one of the grooves and protruding in a direction parallel to a line segment directed toward the center of rotation of the groove, and a recess provided on the other so as to be able to fit with the protrusion; It is characterized by comprising a pressing means for pressing the mold against the groove mold in a direction parallel to a line segment directed toward the rotation center of the groove mold.
Forming equipment for FRP beams.