JP2001271263A - Jig for producing ring-like reinforcing fiber substrate and method for producing ring-like reinforcing fiber substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig for producing a ring-like reinforcing fiber substrate, comprising rolling up a cylindrical member formed by weaving or knitting fibers in the axial direction, by which the reinforcing fiber substrate can efficiently be rolled up in a crease-free compact state. SOLUTION: An uneven anti-slipping member 5 is applied to the peripheral surface of a cylindrical or columnar production jig 4. The anti-slipping member 5 is formed by closely arranging bumps having flat tip surfaces. The method for producing the ring-like reinforcing fiber substrate, characterized by inserting a cylindrical member 11 onto the production jig 4, rolling up the cylindrical member 11 from its one end on the production jig 4 as a guide and then taking out the ring-like rolled product from the direction opposite to the rolling-up direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for manufacturing a reinforcing fiber base material having a ring shape from a tubular body formed by weaving or knitting yarn. Further, the present invention relates to a method for manufacturing a reinforcing fiber base material having a ring shape by using the jig. This reinforcing fiber base material is suitable for forming a tooth part structure of a gear by impregnating a resin.

[0002]

2. Description of the Related Art As a reinforcing fiber base for forming a tooth portion of a resin gear, a tubular body made by weaving or knitting an aramid fiber yarn has been proposed (Japanese Patent Application Laid-Open No. 8-156124). As shown in FIG. 2, the cylindrical body 11 is formed into a ring-shaped reinforcing fiber base material 1 by winding up in an axial direction.
As gears. The reinforcing fiber base and a metal bush arranged at the center of the reinforcing fiber base are accommodated in a molding die, and the liquid resin injected into the molding die is impregnated into the reinforcing fiber base to integrally mold (injection molding). ). For example, FIG.
As shown in the figure, the reinforcing fiber base 1 in which the cross section of the ring is temporarily formed into a rectangular shape after being formed into a ring shape is superposed in two steps in a forming die 3, and a metal bush 2 is arranged in the center to form a forming die. Close 3. Reinforcing fiber base material 1 with pressure when molding die 3 is closed
Is compressed and deformed to conform to the shape of the metal bush 2. Then, the inside of the molding die is brought into a reduced pressure state (1300 Pa), and a liquid resin (crosslinked polyaminoamide, epoxy resin,
Polyimide or the like is injected, penetrates the reinforcing fiber base material 1, and is cured by heating. Thereafter, teeth are formed by cutting around the resin molded body portion including the reinforcing fiber base material 1 to complete the resin gear. This resin gear is preferable because the reinforcing fiber base has a seamless ring shape, so that the strength around each part of the gear is uniform.

[0003]

It is desirable that the above-mentioned reinforcing fiber base material arranged in a ring shape is one in which a cylindrical body is densely wound without forming wrinkles. A dense reinforcing fiber base material without wrinkles is indispensable for the production of a resin molded body having uniform strength at each part and high strength. The problem to be solved by the present invention is to roll up a tubular body formed by weaving or knitting a yarn in the axial direction, and to manufacture a reinforcing fiber base material whose shape is arranged in a ring shape. It is to do. Another object of the present invention is to efficiently perform winding. The present invention provides a jig for manufacturing a ring-shaped reinforcing fiber base and a method for manufacturing a ring-shaped reinforcing fiber base.

[0004]

In order to solve the above-mentioned problems, a manufacturing jig according to the present invention has a cylindrical or columnar shape, on which an inner surface of a cylindrical body inserted outside is closely attached. Have a diameter. The jig is provided with irregularities for preventing slippage on the outer peripheral surface, and the top surface of the convex portion is flat.

[0005] A ring-shaped reinforcing fiber base material is manufactured as follows using the manufacturing jig as described above. First, a tubular body is extrapolated to a manufacturing jig. The inner surface of the cylindrical body is in close contact with the outer peripheral surface of the manufacturing jig, and the cylindrical body is less likely to be wrinkled.
Next, using the manufacturing jig as a guide, the cylindrical body is wound up from one end thereof. The cylindrical body that is in close contact with the manufacturing jig does not easily move in the winding direction due to the frictional force with the outer peripheral surface of the manufacturing jig, and can smoothly perform dense and wrinkle-free winding. If the winding is advanced to some extent, slack may accumulate in the vicinity of the winding and wrinkles may occur.
However, by holding the portion of the ring in which the cylindrical body is wound up and shifting the cylindrical body in the direction opposite to the winding up direction and using the manufacturing jig as a guide, the wrinkles are no longer stretched and smooth winding up can be resumed. In this manner, the reinforcing fiber base material is wound up from one end to the other end and arranged in a ring shape. Removal of the ring-shaped reinforcing fiber base material from the manufacturing jig is performed by moving the reinforcing fiber base material in a direction opposite to the winding. Thereby, turbulence at the end of winding of the reinforcing fiber base material is reduced.

[0006]

FIG. 1 shows a state in which a cylindrical body 11 is extrapolated to a column-shaped manufacturing jig 4 and is wound up. The tubular body 11 is formed by weaving or knitting aramid fiber yarn or other yarn suitable as a reinforcing material. The manufacturing jig 4 is made of an aluminum alloy, and its peripheral surface is divided into a plurality of parts at a predetermined angle, and each divided peripheral surface is provided with a knurled anti-slip 5. This non-slip 5
It is a configuration in which convex portions having a flat top surface by dropping the top portion of a quadrangular pyramid are densely arranged. FIG. 1B shows the relationship between the cylindrical body 11 and the non-slip 5, and the flat top surface of the convex portion forming the non-slip 5 is in close contact with the inner surface of the cylindrical body 11. Wrinkles are less likely to be formed on the cylindrical body. The corners of the protruding portion are caught on the inner surface of the cylindrical body 11, and the frictional force when the cylindrical body 11 slides on the peripheral surface of the manufacturing jig 4 is increased. Since the tubular body 11 has some elasticity, the outer diameter of the manufacturing jig 4 is set to be equal to or slightly larger than the inner diameter of the tubular body 11.

Next, a process for manufacturing a reinforcing fiber base material in which the tubular body 11 is arranged in a ring shape using the manufacturing jig 4 will be described. The manufacturing jig 4 has a tapered tip, from which the cylindrical body 11 is extrapolated, and the entire length is brought into close contact with the peripheral surface of the manufacturing jig 4. Then, the cylindrical body 11 extrapolated to the manufacturing jig 4 is
It is wound in a ring shape downward from the upper end so that a ring is formed on the outer peripheral side. At this time, a force is exerted on the tubular body 11 so as to shift downward. However, since the frictional force between the inner surface of the cylindrical body 11 and the peripheral surface of the manufacturing jig 4 is large, the cylindrical body 1 is firmly held on the manufacturing jig 4 without shifting. The force applied to the upper end of the cylindrical body 11 must act only in the direction in which the cylindrical body 11 is wound in a ring shape.
Can be carried out densely without wrinkling the ring. If winding is advanced to some extent, slack may accumulate near the winding area and wrinkles may occur. However, in such a case, the cylindrical body 1
Hold the part of the ring formed by rolling up
The manufacturing jig is shifted as a guide in the direction opposite to the winding direction (in FIG. 1, it is shifted upward). This allows
The wrinkles no longer grow and smooth winding can be resumed.

After winding up to the end, the reinforcing fiber base material arranged in a ring shape is moved above the manufacturing jig 4 in the direction opposite to the winding up direction and taken out. In this manner, if the film is taken out while being moved in the direction opposite to the winding, the end of the winding is pulled in this operation, so that it is difficult to form wrinkles.

[0009]

As described above, according to the present invention, it is possible to efficiently and smoothly manufacture a reinforcing fiber base prepared in a ring shape from a cylindrical body. The ring-shaped reinforcing fiber base material is dense without any wrinkles and is suitable for forming a uniform and high-strength resin molded product over the entire circumference.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment according to the present invention.
(B) is an enlarged sectional view along the AA 'line of (a).

FIG. 2 is an explanatory diagram showing a process of manufacturing a reinforcing fiber base arranged in a ring shape from a tubular body.

FIG. 3 is a cross-sectional explanatory view showing a state in which a resin gear is formed using a reinforcing fiber base arranged in a ring shape.

[Explanation of symbols]

 1 is a reinforcing fiber base material 11 is a cylindrical body 2 is a metal bush 3 is a molding die 4 is a manufacturing jig 5 is a non-slip

Claims (2)

[Claims] 1. A jig for manufacturing a reinforcing fiber base material in which a tubular body formed by weaving or knitting a yarn is wound up in an axial direction from an end thereof and arranged in a ring shape, wherein the jig is , Which has a cylindrical or columnar shape, has an outer diameter to which the inner surface of the cylindrical body extrapolated closely adheres, and the outer peripheral surface of the jig is provided with irregularities for preventing slippage, A jig for manufacturing a ring-shaped reinforcing fiber base, wherein a top surface of a convex portion is flat. 2. A tubular body formed by weaving or knitting a yarn is extrapolated to the manufacturing jig according to claim 1, and the tubular body is wound up from one end thereof in a direction opposite to the winding direction. A method for producing a ring-shaped reinforcing fiber base, which is detached from a production jig.