JPH0491930A - Molding method of frp vessel - Google Patents

Abstract

PURPOSE:To simplify the molding operation, and to improve the operating efficiency by helically winding a filament on a liner for a vessel, forming a helical layer, continuously transferring helical winding to hoop winding without cutting the filament and forming a hoop layer. CONSTITUTION:When an FRP vessel is molded, a filament 1 is helically wound on a liner 2 for a vessel to shape a helical layer, and helical winding is transferred continuously to hoop winding without cutting the filament 1, thus forming a hoop layer. Accordingly, end-section treatment as the cutting of the filament 1 after the completion of helical winding or the curing operation of a resin is unnecessitated, thus largely shortening the molding time.

Description

[Detailed Description of the Invention] [Industrial Use Wf] The present invention provides filament r noise of FRP container: 7 di]
There is one related to the FW molding method.

[Prior Art] i;' When molding an RP container, helical winding and 71 windings are combined to ensure the required axial and circumferential strength of the container. At this time, since the winding directions are different for linear winding and hoop winding, it is necessary to change the winding method between the fixed filament L 'C'. Otherwise, the filament will shift and the winding will not work as designed. There are cases 6 where not only the performance is poor, but ficiment molding itself is not possible.

So, Tsuji, t\After finishing the liquid winding, filament]l
- Cut off W1 (7, wrap around a specific part of the container and fix 4.1+-j, or let the resin harden for a month.

[Solved 1. 4 assignments] The above prior art has the following problems.

1) The filament must be cut between the helical winding and the hoop winding, and the end of the helical winding must be processed.

2) If it takes 44 minutes to process the finished end of helical winding,
When winding with a hoop, the final laminated part of the helical layer becomes loose [
,ru.

3) Due to the squeezing effect during hoop winding, the helical layer filaments become biased, reducing the strength of the 6th part of the container.

4) In order to completely eliminate the above 2), it is necessary to semi-cure the resin after the helical winding is completed. Such work is complicated and extremely inefficient.

The present invention can solve the above problems,
! :, An object of the present invention is to provide a method 4 for molding an FRP container.

[Means for Solving the Problems] The method for forming an FRP container of the present invention involves forming a helical layer by helically winding a filament on a container liner, and then continuously rolling the filament without twisting it. The second method of winding IJ is that it forms a "boob" layer.

5, when transitioning from helical winding to hoop winding, turn the container inner 0 or 2 or more times [36C], then remove the fiber from the edge of the formed helical layer. Without cutting, the other end of the helical layer is restrained by continuously shifting the filament in a direction that increases the orientation angle of the filament and winding the filament, and then from this other end, the container liner is 360' or After one more rotation, the end of the helical layer is restrained by winding the filament in a direction that increases the orientation angle of the filament without cutting the filament.
After both ends of the helical layer are restrained, hoop winding is started.

[Function] Cutting the filament after helical winding [,7] There is no need to process the ends or harden the resin.
Molding time can be significantly shortened. In addition, it is possible to prevent the strength from becoming low due to loosening of the live men F at the end of the helical winding when moving to the helical winding. In ψ, the helical layer-filament deviation phenomenon due to the squeezing effect during hoop winding can be suppressed, and the strength as designed can be ensured.

11 examples] The embodiments of the present invention will now be described with reference to FIG.

J, sea urchin, pipe diameter 2 Q Om lotus, aluminum liner 2 of pipe l5c1000 shown in Fig. 1(a),
Filament 1 made of glass fiber impregnated with epoxy resin 1
was linearly wound by normal FWd, and helical layers were laminated at a predetermined distance.

Next, details of the transition process from helical winding to hoop winding will be explained with reference to FIGS.

1. Start from the right end l) of the helical winding °C1
Filan'5, live without hesitation
2 while applying 3000 or more rotations to the resin.
By using the viscosity or the frictional force of
Wind one filament while changing the orientation angle, and restrain the helical part at point a on the left side (Fig. 1 (b))
. Next, start from Sat 6ki a and 12. .

Using the same method as for redundancy, - set the orientation angle of filament 1 to , and restrain the right side point b C'\ recal part (first
Figure (C)). In this way, after restraining both the left and right ends a1b, move the filament 1 to the center point C of the liner 2.
1. Perform hoop winding (Figure 1(d)). Note that this point C does not necessarily need to be located at the center of the liner 2.

In this way, the helical winding tube and eve - both left and right ends.
By fixing the helical winding, it prevents it from loosening.
7. At the time of helical winding due to the aperture effect during the subsequent hoop winding. It is also possible to avoid the phenomenon of uneven illumination.

[Effects of the Invention] According to the method for molding an FR, P container of the present invention, molding operations such as filament cutting, no-noment end treatment, and resin effecting operations can be simplified, resulting in improved work efficiency. is extremely good. Furthermore, since both the left and right ends of the linearly wound liner are restrained, the strength is reduced due to loosening of the filament at the end of the helical winding or the start of the hoop winding.
j-+I: It is possible to do this, and it is also possible to prevent unevenness of the filament (at the time of helical winding due to the aperture effect of whirlwind winding). This condensation results in an FRI container with stable quality.

[Brief explanation of drawings]

FIGS. 1(a), (b), (C) and (d) are explanatory diagrams showing the procedure of the molding method of the present invention. ]・Filament 2・・Ly・Su− [(j)

Claims (1)

[Claims] 1) After helically winding a filament on a container liner to form a helical layer, the filament is continuously hoop-wound without cutting to form a hoop layer. Characteristic FRP container molding method. 2) When transitioning from helical winding to hoop winding, while rotating the container liner 360° or more,
Without cutting the fiber from one end of the formed helical layer, the other end of the helical layer is restrained by winding the filament in a direction that increases the orientation angle of the filament, and then from this other end. , container liner 36
One end of the helical layer is restrained by winding the filament with continuous shifts in the direction of increasing the orientation angle of the filament without cutting the fiber while rotating by 0° or more, and thus both ends of the helical layer are wound. 2. The method for forming an FRP container according to claim 1, wherein the process proceeds to hoop winding after the FRP container is restrained.