JPH0691768A - Manufacture of fiber-reinforced resin molded form by filament winding method - Google Patents

Abstract

PURPOSE:To raise productivity by traversing a feed eye at a high speed in a method for manufacturing a fiber-reinforced resin molded form by a filament winding method. CONSTITUTION:An annular rotor 30 is provided around a shaft perpendicular to a rotary shaft 12 of a bend type mandrel 10, and a feed eye 50 is mounted inside the rotor. The method for manufacturing a fiber-reinforced resin molded form by a filament winding method comprises the steps of passing a thermosetting resin-impregnated glass fiber roving 60 through the eye from rear of the rotor, rotating the rotor together with the mandrel in a state engaged with the mandrel, traversing the eye 50 toward the rotary shaft of the mandrel 10, and winding the roving 60 on an outer periphery of the mandrel 10 to be laminated. Then, resin is thermally cured, and removed from the mold by an ordinary method to obtain a bend type tube joint. This method has a different driving mechanism of the eye 50 from a prior art method using a pinion rack and can traverse the eye 50 at a high speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber reinforced resin molded product such as a pipe joint by a filament winding method.

[0002]

2. Description of the Related Art In general, a fiber-reinforced resin molded product produced by a filament winding method is one in which a curable resin-impregnated fiber is wound around the outer periphery of a mandrel while being wound, for example, in a helical shape, and the resin is hardened and demolded. It is manufactured by

In this case, in order to wind the curable resin-impregnated fiber around the outer periphery of the mandrel in a helical shape, for example, to stack the fibers, a feed eye is attached to a traverse table and the mandrel is rotated by using a pinion rack or a ball screw. A method of traversing (reciprocating) in the direction of is widely used (see, for example, JP-B-1-38665 and JP-A-64-45625).

[0004]

In the method of traversing the feedeye using the pinion rack or the ball screw as described above, the drive mechanism thereof inevitably slows the moving speed of the feedeye with respect to the rotating speed of the mandrel. , The moving speed of this feed eye is the rate-determining
There is a problem that productivity cannot be increased so much.

The present invention solves the above problems, and an object of the present invention is to provide a fiber-reinforced resin molded product by the filament winding method which can traverse the feed eye at a high speed, thereby increasing the productivity. A manufacturing method is provided.

In order to achieve the above object, according to the present invention, a curable resin-impregnated fiber is wrapped around the outer periphery of a mandrel while being rotated, and the resin is cured and demolded. In a method for producing a fiber-reinforced resin molded product, a rotating body which is rotatable about an axis substantially perpendicular to the rotation axis of a mandrel is provided, and a feed eye is attached to a part of this rotating body to rotate the rotating body. Thus, the feed eye is traversed in the direction of the rotation axis of the mandrel, and a fiber reinforced resin molded product is manufactured by the filament wine method.

This will be described in detail with reference to the drawings. FIG. 1 is a partially cutaway perspective view showing an example of the method of the present invention. In the figure, 10 is a mandrel, 20 is a mandrel mounting device, 30 is an annular rotating body, 40 is a drive motor (servo motor) for the rotating body, 50 is a feed eye, and 60 is a curable resin-impregnated fiber.

The mandrel 10 has a bending shaft 1 at both ends thereof.
1, the mandrel 10 is set on the mounting device 20 by the curved shaft 11, and the mandrel 10 is rotatable about the rotary shaft 12. The rotation speed of the mandrel 10 is generally controlled by a computer or the like.

The mandrel 10 is generally made of metal, synthetic resin, or the like, and can be removed from the mold by known means such as splitting, deformation, and melting after the laminated resin-impregnated fibers are cured. The shape and size of the mandrel 10 are appropriately set according to the shape and size of the fiber-reinforced resin molded product to be manufactured.

Examples of the fiber-reinforced resin molded product to be manufactured include bend type, elbow type, cheese type and socket type pipe joints. In FIG. 1, as the mandrel 10, a mandrel for manufacturing a bend type pipe joint is shown.

The mounting plate 3 is provided in the diameter direction of the annular rotating body 30.
1, a rotary shaft 32 is attached to the center of the mounting plate 31 by a bearing 33. The rotating shaft 32 is attached substantially perpendicular to the rotating shaft of the mandrel 10. In this way, the rotating body 30 is the mandrel 1
It is rotatable about an axis substantially perpendicular to the axis of rotation of 0.

The diameter of the rotating body 30 is preferably equal to or longer than the length of the mandrel 10.

A timing belt 42 is stretched around the outer periphery of the rotating body 30 and the pulley 41 of the drive motor 40, and the pulley 41 is rotated by the drive motor.
Thereby, the annular rotating body 30 is rotated. The rotation speed of the rotating body 30 is generally controlled by a computer or the like.

Further, a feed eye 50 is attached to one end of a mounting plate 31 installed inside the rotating body 30. As the feed eye 50, a commonly used doughnut-shaped feed eye as shown in the figure is used.

The feed eye 50 may be directly attached to the inner wall of the rotating body 30 instead of being attached to a part of the rotating body 30 via the attaching plate 31 as in the above example. Also,
It can also be attached directly to the outer wall of the rotating body 30.

In addition to the timing belt 42 being laid around the outer periphery of the rotary body 30 as in the above example, a pulley is separately attached to the rotary shaft 32 of the rotary body 30 and the timing belt 42 is laid over the pulley. Good.

In the present invention, the reinforcing fibers used are not particularly limited, but examples thereof include inorganic fibers such as glass fibers and carbon fibers, and organic fibers such as aramid fibers and polyethylene terephthalate fibers. In particular, a roving or a cloth tape made of glass fiber (a roving woven in a cross beam shape, for example, the weave and the width thereof are not particularly limited) is preferably used.

The curable resin-impregnated fiber is a reinforcing fiber impregnated with a curable resin, and it is preferable that 100 parts by weight of the reinforcing fiber is impregnated with 50 to 200 parts by weight of the curable resin.

A conventionally known thermosetting resin is used as the curable resin, and an unsaturated polyester resin or an epoxy resin is particularly preferably used. A photo-curable resin is used depending on the case.

A curing agent and a curing accelerator are generally added to the above curable resin. As these curing agents and curing accelerators, conventionally known ones may be used, and examples of the thermal curing agent include methyl ethyl ketone peroxide,
Examples thereof include benzoyl peroxide, and examples of the curing accelerator include cobalt naphthenate, manganese naphthenate, dimethylaniline, and the like.

Further, the curable resin may optionally contain other known additives such as fillers such as colloidal silica, glass balloons, calcium carbonate and talc. When adding filler,
The amount added is 0.5 to 100 parts by weight of the curable resin.
50 parts by weight is preferred.

In order to manufacture a fiber-reinforced resin molded product, for example, a bend type pipe joint, the mandrel 10 is set on the mandrel mounting device 20 by the bending shaft 11. Then, a curable resin-impregnated fiber 60 such as curable resin-impregnated fiber roving is passed through the feed eye 50 from the rear of the rotating body 30 and is hooked on the mandrel 10.
When the mandrel 10 and the rotating body 30 are rotated by a predetermined program, the curable resin-impregnated fibers 60 are aligned in a tape shape by the feed eye 50 and are formed into a desired pattern on the outer periphery of the mandrel 10. Wrapped around.

In addition to the above rotary operation, it is preferable to add a rotary operation in which the feed eye 50 swings on a horizontal plane including the rotation axis of the mandrel 10 to the rotary body 30. Further, it is preferable to add to the rotating body 30 a movement operation in which the feed eye 50 moves toward and away from the mandrel 10 and a movement operation in which the feed eye 35 moves up and down.

By adding such a turning operation and a moving operation, the direction of the feed eye 35 can always be properly aligned with the direction of feeding the resin-impregnated fiber 60, particularly when manufacturing a pipe joint such as a cheese mold. It is possible to prevent the width of the curable resin-impregnated fiber, which is wound around the outer periphery of the mandrel and is converged into a tape, from being narrowed or twisted into a string.

In this way, the curable resin-impregnated fiber is laminated on the outer periphery of the mandrel to a certain thickness, then this is removed from the mounting device 20 and placed in a heating furnace to thermally cure the resin, and the fiber of the end face portion is removed. The reinforced resin layer is cut and removed. afterwards,
The mold is removed by a known means such as division, deformation and melting. Thus, a fiber-reinforced resin molded product such as a pipe joint is manufactured.

[0025]

As described above, a rotary body that is rotatable about an axis substantially perpendicular to the rotation axis of the mandrel is provided, a feed eye is attached to a part of the rotary body, and the rotary body is rotated to rotate the feed eye. Is traversed in the direction of the rotation axis of the mandrel, the feed eye makes a circular motion with the rotation of the rotating body, and as a result, the feed eye is traversed in the direction of the rotation axis of the mandrel.

The method of traversing (reciprocating movement, preferably linear reciprocating movement) of the feed eye using the above-mentioned rotating body is more than that of the conventional method of traversing the feed eye using a pinion rack or a ball screw. Due to the difference in the driving mechanism, the moving speed of the feed eye can be remarkably increased.

[0027]

EXAMPLES Examples and comparative examples of the present invention will be shown below. Example 1 First, as shown in FIG. 1, ten glass fiber rovings (count 2220 g / km) were aligned and impregnated with a thermosetting epoxy resin liquid, so that the content of the glass fiber rovings was about 60 volumes. % Thermosetting resin impregnated fiber roving 60 was prepared.

The thermosetting epoxy resin liquid is 100 parts by weight of an epoxy resin (LY-556: manufactured by Nippon Ciba Geigy) and 90 parts of a curing agent (HY-917: manufactured by Nippon Ciba Geigy).
It is composed of 0.5 part by weight and 0.5 part by weight of a curing accelerator (DY-070: manufactured by Nippon Ciba Geigy).

Next, these ten thermosetting resin-impregnated fiber rovings 60 are aligned in a feed eye 5
The mandrel 10 of which the width is converged to about 45 mm through 0, and which is formed so as to be assembled and disassembled is rotated, and the rotating body 30 to which the feed eye 50 is attached is rotated. Was traversed in the direction of the rotating shaft 12.

In this way, the thermosetting resin-impregnated fiber roving 60 is wound around the outer periphery of the mandrel 10 in a helical shape of ± 60 °, and a circumferential winding of 90 ° is further added to the outer periphery of the mandrel 10. The impregnated fiber roving 60 was laminated.

Then, the mandrel 10 on which the thermosetting resin-impregnated fiber roving 60 is laminated is heat-cured at 130 ° C. for 2 hours, the resin-cured fiber layers at both ends are cut and removed, and then demolded to have a thickness of 3 mm. , Inner diameter 150mm, length 350mm
A bend-type fiber-reinforced resin pipe joint having an angle of 45 ° (the length of only one of the symmetrical portions) was manufactured.

When the thermosetting resin-impregnated fiber roving 60 is wound around the mandrel 10, the thermosetting soft unsaturated polyester resin liquid [Polymer 63
20F (iso type): manufactured by Takeda Pharmaceutical Co., Ltd.] was applied to the outer periphery of the mandrel.

In this case, the annular rotating body 30 can be rotated at a relatively high speed, and the time required to wind the thermosetting resin-impregnated fiber roving 60 around the outer periphery of the mandrel 10 was 8 minutes. Further, the obtained bend type pipe joint did not break in the water pressure test of 40 kg / cm ² , and retained sufficient strength. Example 2 As shown in FIG. 1, glass fiber roving (count 222
0 g / km 2) were prepared and impregnated with a thermosetting unsaturated polyester resin liquid to prepare a thermosetting resin-impregnated fiber roving having a glass fiber roving content of about 60% by volume.

The thermosetting unsaturated polyester resin liquid is 100 parts by weight of unsaturated polyester [Ester R235 (Ortho): manufactured by Mitsui Toatsu Co., Ltd.] and 0.6 part by weight of a curing agent (Kayamek M: manufactured by Kayaku Akzo). Parts and curing accelerator (cobalt 6
0.5% by weight).

Then, the ten thermosetting resin-impregnated fiber rovings were aligned and passed through a feed eye to converge the width to about 45 mm, and a cheese-type mandrel formed so as to be assembled and disassembled was rotated. The feed eye was traversed in the direction of the rotation axis of the main pipe axis of the mandrel and then in the direction of the rotation axis of the branch pipe axis by rotating the rotating body to which the feed eye was attached.

Thus, the thermosetting resin-impregnated fiber roving is wound around the outer periphery of the mandrel in a helical shape of ± 20 ° and ± 70 °, and a 90 ° circumferential winding is further added to the outer periphery of the mandrel. Resin impregnated fiber rovings were laminated.

Thereafter, the mandrel on which the thermosetting resin-impregnated fiber roving was laminated was heat-cured at 80 ° C. for 1 hour, the resin-cured fiber layers at both ends were cut and removed, and then demolded to have a thickness of 3 mm and an inner diameter. A cheese-type fiber-reinforced resin pipe joint having a length of 150 mm, a main pipe length of 150 mm, and a branch pipe length of 75 mm was manufactured.

When the resin-impregnated fiber roving is wound around the mandrel, thermosetting soft unsaturated polyester resin [Polymer 6320F (iso type):
Takeda Pharmaceutical Co., Ltd.] was applied to the outer periphery of the mandrel.

In this case, the rotating body could be rotated at a relatively high speed, and the time required to wind the thermosetting resin-impregnated fiber roving around the outer periphery of the mandrel was 15 minutes. In addition, the cheese-type pipe joint obtained is 40 kg /
In the water pressure test of cm ² , it did not break and retained sufficient strength.

[0040]Comparative Example 1  In Example 1, the feed eye is mounted using the rotating body.
Change to the method of traversing in the direction of the rotation axis of the drel
And use the ball screw to rotate the feed eye of the mandrel.
A conventional method of traversing in the direction of the roll axis was used. So
Except for this, the same procedure as in Example 1 was carried out.

In this case, the moving speed of the feed eye cannot be increased from the viewpoint of the driving mechanism as in Example 1, and the time required for winding the thermosetting resin-impregnated fiber roving around the mandrel is about. It was 25 minutes.

[0042]Comparative example 2  In Example 2, the feed eye was mounted using a rotating body.
Change to the method of traversing in the direction of the rotation axis of the drel
And use the ball screw to rotate the feed eye of the mandrel.
A conventional method of traversing in the direction of the roll axis was used. So
Except for this, the same procedure as in Example 1 was carried out.

In this case, the moving speed of the feed eye cannot be increased from the viewpoint of the driving mechanism as in Example 1, and the time required to wind the thermosetting resin-impregnated fiber roving around the outer periphery of the mandrel is about. It was 40 minutes.

[0044]

The present invention is constructed as described above, and in particular, a rotary body rotatable about an axis substantially perpendicular to the rotary axis of the mandrel is provided, and a feed eye is provided in a part of the rotary body. Is attached, and the feed eye is traversed in the direction of the rotation axis of the mandrel by rotating the rotator, which allows the feed eye to be traversed at high speed.

Therefore, according to the method of the present invention, the curable resin-impregnated fiber can be wound around the outer periphery of the mandrel at a high speed, and the fiber reinforced can be reinforced as compared with the conventional method in which the feed eye is traversed by using a pinion rack or a ball screw. The productivity of the resin molded product can be significantly improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an example of the method of the present invention.

[Explanation of symbols]

 10 Mandrel 12 Mandrel Rotating Shaft 30 Annular Rotating Body 50 Feed Eye 60 Curable Resin Impregnated Fiber

Claims (1)

[Claims] 1. A curable resin-impregnated fiber is wound around the outer periphery of the mandrel while rotating, and laminated.
In the method of manufacturing a fiber-reinforced resin molded product by curing and demolding a resin, a rotating body that is rotatable about an axis substantially perpendicular to the rotation axis of the mandrel is provided, and a feed eye is attached to a part of this rotating body. And a feed eye is traversed in the direction of the rotation axis of the mandrel by rotating the rotary body.