JPS58138618A - Manufacture of frp hoop material - Google Patents

Abstract

PURPOSE:To prevent defects such as uniformity etc. from occurring in fibers by changing conditions to supply reinforced fibers or resin while the reinforced fibers are wound. CONSTITUTION:The reinforced fibers B that passed through the tension adjuster 10 is made to pass the resin impregnating amount adjuster 20 through idle rolls 15, 16. At the beginning of winding a small content of fibers is applied and at the end thereof a content of fibers is increased to wind the mandrel 3. In other words, as the squeezing force by the resin impregnating amount adjuster 20 is changed; the resin is squeezed, in the beginning, with a relatively weak squeezing force and then the resin impregnating amount is increased. Therefore, the fibers can be prevented from being biasedly located toward the side of the mandrel.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applied to FRP plate springs, etc.
The present invention relates to a method for manufacturing an RP strip.

An example of a method for manufacturing an FRP strip is the filament winding method (FW method). As shown in Fig. 1, an example of this is shown in Fig. 1.
Wrap it multiple times, for example ten times, and heat and harden it.
) It is molded in one piece.

However, as can be seen from the table, in the case of the above conventional method, the tension of the reinforcing fiber acts on the mandrel, and in general, when the resin is cured while being rotated once, excessive tension is applied sequentially, especially at the beginning of winding on the mandrel side. KIJ), as a result, the reinforcing fiber density on the mandrel side becomes large. As a result, the fibers were exposed and the surface became rough, resulting in poor appearance, and uneven fiber density led to problems with strength and durability.

The present invention has been developed based on the above circumstances, and its purpose is to manufacture an FRP strip that can prevent defects such as the density of reinforcing fibers being biased toward the mandrel side, and that can improve durability and appearance. The purpose is to provide a method.

That is, the present invention involves winding the reinforcing fibers around the mandrel and overlapping them in the thickness direction while changing the supply conditions of the reinforcing fibers or resin, such as the tension of the reinforcing fibers, the resin-impregnated lid, and the composition of the resin, during the winding of the reinforcing fibers around the mandrel. This is a method of manufacturing an FRP strip by integrally molding t% mold.

Embodiments of the present invention will be described below with reference to Section 2 to FIG. 8. In FIG. 2, reference numeral 1 indicates a pace body, and a mandrel 3 is rotatably supported on this pace body 1 via bearing members 2, 2. This mandrel 3
is rotated by a motor 4 in the direction of arrow F, and is heated to a predetermined temperature by a heater (not shown). Well, the above mandrel 3
A molding groove 5 corresponding to the shape of the FRP strip to be molded is formed on the outer peripheral surface of the molding member.

t7't%g is a resin impregnation tank, and this impregnation tank 6 contains resin 1 such as thermosetting resin.

A tension regulator 10 is provided within the impregnating tank 6.

This tension adjuster 10 is provided with a pair of rollers 13, 14f parallel to each other and facing each other between, for example, pace plates 11 and 11, and reinforcing fibers n are inserted between these rollers 13 and 14. As if it were to be done & be taken. The above roller 33
14 can be changed relative to each other by rotating the pace plates 11 and 11. That is, as shown in FIGS. 5 and 186, the angle #te#st between the rollers can be adjusted, and the tension between the mandrel 3 and the tension adjuster is adjusted so that the tension becomes higher as #1*#I becomes larger. The tension of reinforcing fiber B can be adjusted between 10 and 10.

In addition, the above-mentioned tension adjuster 10 [The good reinforcing fiber B that passes through the idle rollers 15 and 16f passes through the resin impregnated amount adjuster 10.
It is a trap to pass through. The O impregnated amount adjuster 20 is composed of, for example, a pair of parallel rollers xi, xzt'ria whose distance from each other can be adjusted, and between the extra resin tube rollers zx, zx impregnated with reinforcing fiber BK. The aperture is now set to 9.

Further, between the impregnated amount 1IIIi device j0 and the mandrel 3, a K111 aligner 21 is provided. This fiber aligner 2j is provided with tooth-shaped guide pins 9 and 9, so that the reinforcing fibers B pass through each guide pin 24 and are aligned. It has become.

Above lII! 1. To manufacture the FBP strip using a device, impregnate the resin by passing the reinforcing wire through the impregnated @g, and then pass it through the impregnating mm * machine to remove excess Iij! While squeezing the kt, attach it to the mandrel 30 genus 5 to 4. Further, as shown in Fig. 9 of the welfare section, seven holes 6a of an appropriate size may be inserted so that a predetermined 0@fat impregnated amount is obtained before the oil is removed from the impregnating tank 6.

During heating and hot oiling, the conditions for supplying the acidified fiber B or resin are changed as described below, and the fibers are wound and integrally molded.

[Example 1] In this example, the fiber content is reduced at the beginning of the winding, and the fiber content is increased at the end of the winding, and the material is wound around the mandrel 3. That is, the squeezing force by the resin impregnated amount regulator 20 is changed, and the resin tube is squeezed 9 with a relatively weak squeezing force at first, and the resin impregnated amount is increased.

Specifically, when obtaining a plate spring with a plate width of 6.0 mm and a plate thickness of 12 mm, 4800 T @ Assuming that 14 rovings are bundled together and a mourning cloth is used, at the beginning of the winding, the fiber content is set to 68 wt and the winding is done in 5 layers.
Next, layer 1-5 layers of 70 wt-. Furthermore, on the outside, five layers of 72vt- are layered, and then heat-cured or room-temperature cured and molded into one piece.

By the above operations, it was possible to prevent the fibers from shifting toward the mandrel side, and an FRP strip having better physical properties and appearance than conventional products was obtained. Note that the fiber content can be adjusted by using the resin impregnation amount regulator 20 or by partially using reinforcing fibers that are not impregnated with the resin tube, and automation is also possible.

[Example 2] In this example, by one operation of the tension regulator 10, the tension tubes at the beginning and end of the winding were changed and the winding was performed. That is, at the beginning of winding, the rollers 13 and 14
The angle formed by #,, #.

is made smaller to weaken the tension and then wound around the mandrel 3, and gradually increase the aleamk to increase the tension. By the above operation, it is possible to prevent excessive tension from being generated in the fibers arranged on the mandrel side, so as in the case of Example 1, it is possible to prevent the fibers from being biased toward the mandrel side.
A product with good physical properties and appearance can be obtained.

[Example 3] - Moreover, by combining the above-mentioned Examples 1 and 2, even better physical properties and surface appearance can be obtained. That is, at the beginning of winding, the fiber content is reduced and the tension is set low, and at the end of the winding, the fiber content is increased and the tension is increased. By doing so, the effects of Example 1.2 can be synergistically exhibited, and a high quality product with particularly excellent fatigue resistance can be obtained.

[Example 4] In this example, by adding a mold release agent only at the beginning of winding and using a good resin, the mold release agent is mixed into the resin on the mandrel side, and productivity is improved by improving mold release properties. It is possible to improve the

Specifically, using the method of Example 3 above, the first five layers (
5 ply), for example, zinc stearate, fluid/
l The reinforcing fibers are impregnated with a resin containing an internal mold release agent such as rough-in, and after that, the resin is replaced and impregnated with one that does not contain a mold release agent, and then rolled up.
□This way, the mold release agent can be supplied only to the areas where it is needed, which saves on mold release agent, and the mold release agent does not spread throughout the resin, making it easier to use the mold release agent.
It is possible to minimize the decrease in strength due to the presence of the type Il agent.

It should be noted that the present invention is not limited to these examples, but can be carried out by variously changing the supply conditions of reinforcing fibers or resin, contrary to the gist of the present invention. For example, the tension, content, etc. of the reinforcing fibers may be changed only partially during the winding process, or the entire winding process may be the same.

You can also change it continuously! . Furthermore, the resin components and additives may be changed during winding, thereby making it possible to obtain a variety of FRP strips.

As described above, the present invention changes the supply conditions of the reinforcing fibers or resin during the winding of the reinforcing fibers. It is possible to prevent defects such as the unevenness of fibers 9, which has been observed, and to improve durability and surface appearance. Furthermore, according to the present invention, it is possible to arbitrarily change the fiber density in the thickness direction of the strip to be molded, so it has great effects such as being able to obtain a variety of strips that meet design requirements. .

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the ninth device for implementing the conventional FW method,
Figures 2 to 8 show an embodiment of an apparatus for carrying out the method of the present invention, in which Figure 2 is a schematic side view of the apparatus, Figure 3 is a plan view of the apparatus, and Figure 4 is a resin impregnation tank. , FIG. 5 and FIG. 6 are side views showing different operating states of the tension regulator, FIG. 7 is a perspective view of the resin impregnation amount regulator, and FIG. 8 is a perspective view of the fiber aligner. #! FIG. 9 is a perspective view showing a modification of the resin impregnation tank. 3... Mandrel, 6... Resin impregnation tank, 1... Resin, B... Reinforced fiber. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 9

Claims (1)

[Scope of Claims] (1) A plurality of reinforcing fibers impregnated with resin are wound around a mandrel and overlapped in the thickness direction, and the feeding conditions of the reinforcing fibers or resin are changed in the middle of the winding. A method for manufacturing an FRP strip, characterized by integral molding. (2) The resin impregnation I/kt of the reinforcing fibers may be changed by t% during one cycle (Claim No. 1)
A method for producing an FRP strip as described in Section 1. (37) The bottle or coil (
2) The method for producing an FRP strip according to item 2). (4) Only when you start winding the reinforcing fibers on the T-mandrel,
Added mold release agent*)l*t-using t% mold and %lil! F--A method for manufacturing an FRP strip according to any one of items (1 to <3) of the desired scope.