JPS60179238A - Method for manufacturing a truss-shaped cylindrical body made of fiber-reinforced plastics and apparatus for manufacturing the same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a method for manufacturing a truss-shaped cylindrical body made of fiber-reinforced plastics and an apparatus for manufacturing the same.

(b) Prior art Fiber reinforced plastics (hereinafter referred to as FRP) have excellent specific strength and specific elasticity, and are therefore being applied to various structures aimed at reducing weight. but,
Compared to the performance in the fiber direction, the performance of FRP in the direction perpendicular to the fiber direction tends to be extremely poor, and in that direction, only the performance of the resin matrix is effectively exhibited. Fl (
This is one of the characteristics of P.

The truss-shaped cylindrical body to which this invention is directed, for example, as shown in FIG. It is composed of a first helical beam 2 inclined at a certain angle, and a second helical beam 2' whose inclination direction is opposite and which intersects the first helical beam 2 on the hoop beam 1. , a lattice-like cylindrical body consisting of a hoop beam 1 and helical beams 2, 2'.

(→ Purpose of the Invention In order to manufacture the above-mentioned truss-shaped cylindrical body using FRP, it is necessary to take into consideration the above-mentioned characteristics of FRP and to exhibit the advantageous performance of FRP.

Therefore, an object of the present invention is to provide a manufacturing method that can exhibit advantageous performance of the FRP tositrus-like cylindrical body RP, and an apparatus for carrying out the method.

(2) Structure of the Invention In order to achieve the above object, the invention of the manufacturing method provides a traverser that overflows the mandrel and moves back and forth in the axial direction of the mandrel, and uses the traverser as a path for the resin-impregnated continuous fibers wound around the mandrel. A path for the continuous fibers on the helical beam side to reach the mandrel via the traverser, and a path for the continuous fibers on the hoop beam side to reach the mandrel without passing through the traverser are formed, and the fibers are removed from each of the above paths by reciprocating the traverser while rotating the mandrel. It is configured to supply

In addition, the invention of an apparatus for carrying out the invention of the manufacturing method described above involves attaching a large number of triangular blocks of the same shape and thickness to the outer peripheral surface of the main body of the mandrel at regular intervals in the circumferential direction and the axial direction. The above-mentioned blocks form one block group by arranging the blocks adjacent to each other in the circumferential direction so that one side of each block is parallel to the circumferential direction, thereby forming one block group, and the blocks adjacent to each other in the axial direction By arranging the required number of blocks in each group in the axial direction so that they are offset by one block in the circumferential direction, the grooves between the blocks form hoop beam grooves, and the grooves between the blocks that intersect with the grooves are formed. This structure forms a helical beam groove.

(e) Example As shown in FIGS. 2 and 3, after being supplied and impregnated with resin, the path 5a of the continuous fiber bundle 5 on the helical beam side is
and a path 6a of the hoop beam side continuous fiber bundle 6. The former Nox 5a is provided with a traverser 9 that reciprocates along the axial direction of the mandrel 8, and is connected to IJ.
The continuous fiber bundle 5 for the cull beam is passed through this traverser 9 and wrapped around the mandrel 8. Also, the latter path 6a
Appropriate guide rollers 1o and io' are provided in the middle of the hoop beam side continuous fiber bundle 6 to be guided to the mantle L/le 8 without passing through the traverser 9.

As shown in FIGS. 4 and 5, the mandrel 8 has a large number of identical shapes on the outer periphery of a cylindrical mandrel body 11.
Triangular blocks 12 of the same thickness are arranged at regular intervals in the circumferential and axial directions, and are fixed with bolts 13.

The above-mentioned triangular blocks 12 are arranged one block group A around the entire circumference by alternately changing the orientation one by one so that each side a of the blocks 12 adjacent to each other in the circumferential direction is parallel to the circumferential direction. , the required number of blocks 12 of axially adjacent block groups A are shifted in the circumferential direction by one block. When arranged in this way, the hoop beams are formed by the grooves between the block groups A. A groove 14 is formed, and a helical beam groove 15 intersecting with the groove 14 is formed.

The above-described continuous fiber bundle 5 for helical beams is introduced into the helical beam groove 15, and the continuous fiber bundle 6 for hoop beams is introduced into the hoop beam groove 14, and each of the above-mentioned passes 5a, 5
The mandrel 8 is rotated by .degree. and the traverser 9 is moved while feeding each of the fiber bundles 5 and 6 through a. Traversa 9
By moving in one direction, the aforementioned first helical beam 2 is formed, and by moving back, the second helical beam 2' is formed.

After completing the winding in this way, all blocks 12
When the mold is removed by removing the mandrel body 11 and shifting the truss-shaped cylinder formed on the mandrel body 11 in the axial direction, a truss-shaped cylinder as shown in FIG. 1 can be obtained.

In addition, the ratio of the supply amount of both edge string bundles 5 and 6 is suitably determined according to the required force ratio in the circumferential direction and the axial direction. Further, the winding of the cocoon fiber bundles 5 and 60 may not be carried out at the same time, but may be carried out at time intervals. In addition, fiber bundles 5 and 6
Glass fiber, Kevlar fiber (1
Kevlar (trademark), carbon fiber, etc.

(f) Effects As described above, according to the present invention, elements in different directions, that is, continuous fiber bundles forming a hoop beam and a helical beam, can be simultaneously wound, and the winding Since the direction of the fibers can be aligned in the direction of , it is possible to provide a truss-shaped cylindrical body that has high production efficiency (and can fully demonstrate the performance of FRP).

[Brief explanation of the drawing]

Figure 1 is a perspective view of the truss-shaped cylinder, Figure 2 is a cross-sectional view of the manufacturing equipment, Figure 3 is a plan view of the manufacturing equipment, Figure 4 is a partially enlarged plan view of the mandrel, and Figure 5 is the mandrel. It is a partially enlarged plan view. 1... Hoop beam 2, 2'... Helical beam 5...
Continuous fiber bundle for helical beam 6... Continuous fiber bundle for hoop beam 5 a, 5 b... Pass 7... Resin impregnation tank 8
... Mandrel 9 ... Traverser 11 ... Mandrel body 12 ... Block 13 ... Bolt 14
...Hoop beam groove 15...Helical beam groove Patent applicant: Sumitomo Electric Industries, Ltd. Agent: Kama 1) Text 2

Claims (2)

[Claims] (1) A traverser is provided that moves back and forth in the axial direction of the mandrel, and a path for the continuous fibers for the helical beam that reaches the mandrel via the traverser is used as a path for the resin-impregnated continuous fibers to be wound around the mandrel, and a path for the continuous fibers for the helical beam to be passed through the traverser to the mandrel, and a path for the continuous fibers for the helical beam to be wound around the mandrel. A truss-shaped cylindrical body made of fiber-reinforced plastics, characterized in that a continuous fiber path for a hoop beam is formed to reach a mandrel without passing through the fibers, and the fibers are supplied from each of the above-mentioned paths by reciprocating a traverser while rotating the mandrel. manufacturing method. (2) Fiber reinforcement in which a traverser is provided that reciprocates in the axial direction of the mandrel, and the resin-impregnated continuous fibers wound around the mandrel are supplied by a pass that passes through the traverser and a pass that does not pass through the traverser. In an apparatus for manufacturing a plastic truss-shaped cylindrical body, the mandrel is constructed by attaching a large number of triangular blocks of the same shape and thickness at regular intervals in the circumferential and axial directions on the outer peripheral surface of the main body, and One block group is formed by arranging blocks adjacent to each other in the circumferential direction so that one side of each block is parallel to the circumferential direction, thereby forming one block group. By arranging the required number of blocks in the axial direction with a shift of one block in the circumferential direction, the grooves between each block group form a hoop beam groove, and the grooves between the blocks that intersect with the groove form a helical beam groove. An apparatus for manufacturing a truss-shaped cylindrical body made of fiber-reinforced plastic, characterized by the following.