JPH01128826A - Guider of filament winding device - Google Patents

Abstract

PURPOSE:To reduce the friction between a guide and fiber at winding so as to obtain enough spread of the fiber on a mandrel by a constitution wherein the guide is composed of a first roll, the axis line of which is arranged almost normal to the guiding direction of the fiber, and two second rolls, each of which is arranged in a plane almost normal to the first roll. CONSTITUTION:Resin-impregnated fiber 2 is wound at first round a first roll 12 so as to be guided downwards and, after that, passed between a pair of second rolls 13a and 13b and finally taken up by a mandrel 7. In this case, since the rolls 12, 13a and 13b rotate freely, no frictional resistance is applied to the fiber 2. Accordingly, neither breakage nor fluffing of the fiber 2 occurs. Since the radii of curvature of the rolls 12, 13a and 13b are extremely larger than any conventional delivery eyes such as circular, semicircular, elliptic eyes and the like, no bundling of the fiber 2 develops and the fiber 2 is wound round the mandrel 7 with enough spread. The diameters of the rolls 12, 13a and 13b depend upon the brittleness of the fiber. The larger the diameter the better.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention is directed to a filament winding device used in a filament winding method, which is one of the molding methods for producing fiber-reinforced resin molded products. This invention relates to the structure of a guide body that guides fibers.

<Prior art> Conventionally, when using the filament winding method in manufacturing fiber-reinforced resin molded products, the methods shown in Figs. 6 and 7
A filament winding device as shown in the figure was used. That is, the fiber (filament or roving) 2 drawn out from the creel 1 is guided by a guide 3 and impregnated with resin in a resin bath 4, and after the excess resin is squeezed out by a squeezing mechanism 5, it is passed to a delivery eye. It is guided to an annular guide body 6. This guide body 6 reciprocates in the axial direction of the mandrel 7 and guides the resin-impregnated fibers 2 while reciprocating in the vertical and front-back directions, so that the fibers 2 are helically wound around the rotating mandrel 7. (See Japanese Unexamined Patent Publication No. 57-41920).

<Problems to be Solved by the Invention> However, in the guide body of such a conventional filament winding device, when the fiber is passed through the guide body and wound around the mandrel, the fiber is subjected to large frictional resistance at the guide body portion. This resulted in fiber breakage or a large amount of fuzz.

Furthermore, since the guide body was circular in shape and had a small radius of curvature, the fibers were converged and could not be spread sufficiently on the mandrel. Because of the damage to the fibers shown by the occurrence of fuzz and the convergence of the fibers on the mandrel, the resulting molded product could not sufficiently reflect the inherent strength of the fibers.

In view of these conventional problems, the present invention aims to reduce the friction between the guide body and the fibers during winding, and to ensure that the fibers are sufficiently spread on the mandrel. purpose.

Means for Solving the Problems> For this reason, the present invention provides at least one rotatable first roll in which the guide body is arranged with its axis substantially perpendicular to the direction of the guided fibers; At least two second fibers, each of which is freely rotatable, are arranged with their axes substantially perpendicular to a plane substantially perpendicular to the direction of the guided fibers.
It is composed of roles.

<Function> According to the guide having the above structure, the fibers are wound around at least one first roll, and the fibers are wound around at least two second rolls.
By passing the fiber between rolls and guiding it by winding it around one of the rolls, the frictional resistance between the guide and the fiber is reduced, preventing damage to the fiber, and the radius of curvature is increased, so the fiber can be spread sufficiently on the mandrel. It is possible to wrap the fibers in a uniform manner, resulting in a molded product with uniform properties and excellent physical properties.

<Example> An embodiment of the present invention will be described below with reference to FIG.

The guide body 10 located in front of the mandrel 7 includes a bracket 11, one first roll 12, and two second rolls 13a and 13b. The first roll 12 is rotatably supported on the upper part of the bracket 11 and arranged horizontally,
In use, it is arranged substantially parallel to the axis of the mandrel 7. Further, the second rolls 13a and 13b are rotatably supported at a predetermined interval under the bracket 11 and arranged horizontally, so as to intersect with the first roll 12 at a substantially right angle.

Note that the first roll 12 may be arranged with its axis substantially perpendicular to the direction of the fibers 2 guided by the first roll 12, and the second rolls 13a and 13b may
The fibers 2 may be arranged with their respective axes substantially perpendicular to a plane substantially perpendicular to the direction of the fibers 2 being guided. Of course, the second rolls 13a, 13b have sufficient length to guide the fibers 2 from the first roll 12.

Further, the bracket 11 is reciprocated along the axis of the mandrel 7 by a drive mechanism (not shown), and can also be reciprocated in the vertical and longitudinal directions.

Therefore, the resin-impregnated fibers 2 are first transferred to the first roll 1.
2 and guided downward, and then pulled through between a pair of second rolls 13a and 13b to form a mandrel 7.
is wound up.

Here, since the rolls 12.13a and 13b rotate freely, the fibers 2 are not subjected to frictional resistance, and therefore the fibers 2
There is no damage and no fuzz is generated.

The radius of curvature of the rolls 12.13a, 13b is a conventional circle.

Since it is extremely large compared to any of the delivery eyes, such as semicircular or oval, the fibers 2 are not bundled.
It can be wound around the mandrel 7 with sufficient spread. The diameter of the rolls 12.13a, 13b depends on the fragility of the fibers, but the larger the diameter the better.

In addition, the rolls 12.13a and 13b have a straight shape as shown in Fig. 1, a shape with a slightly tapered center part as shown in Fig. 2, and a shape with a bulge in the center part as shown in Fig. 3. Any shape may be used, and each roll may have a fourth
As shown in Figures (^) and (B), grooves may be provided in the axial direction. Further, the Q may have a protrusion on the opposite side.

Note that, as shown in FIG. 5, a third roll 14 parallel to the first roll 12 may be further disposed below the first roll 12 and the second rolls 13a, 13b.

<Effects of the Invention> As explained above, according to the guide body of the present invention, damage to the fibers can be prevented, and a molded product that is uniform and has excellent physical properties that is sufficiently distributed on the mandrel can be obtained. .

Note that the present invention is applicable to any fibers (e.g., glass fibers, carbon fibers,
It is also useful for brittle fibers such as carbon fibers, especially when using high modulus carbon fibers. very useful.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the main parts of a filament winding device showing one embodiment of the present invention, and FIGS. 2, 3, and 4 (
A) is a perspective view showing an example of another shape of the roll, FIG. 4 (B)
) is a sectional view of the same figure (A), FIG. 5 is a perspective view of a guide body showing another embodiment of the present invention, and FIG.
A schematic diagram of the winding device, and FIG. 7 is a perspective view of a conventional guide body. 1... Creel 2... Fiber 4... Resin bath 6... Conventional guide body 7... Mandrel 10
... Guide body according to the present invention 11 ... Bracket
12...First roll 13a, 13b...Second roll 14...Third roll Patent applicant Nippon Oil Co., Ltd.

Claims (1)

[Claims] In a filament winding device that manufactures fiber-reinforced resin molded products by guiding fibers impregnated with resin and winding them around a mandrel, the guide body that guides the fibers has an axis approximately parallel to the direction of the guided fibers. at least one rotatable first roll arranged orthogonally;
A filament winding characterized by comprising at least two second rolls, each of which is freely rotatable, arranged with their axes substantially orthogonal to a plane substantially perpendicular to the direction of the guided fibers. Equipment guide.