JPH0361526A - Filament winding molding method - Google Patents

Abstract

PURPOSE:To miniaturize a molding equipment and to save material cost by retreating a delivery eye to the original reciprocating position and thereafter traversing it toward the other end side when stopping of a filament member lengthened from the delivery eye is completed on a stopping projection by rotation of a mandrel which is performed in parallel with access to the mandrel of the delivery eye. CONSTITUTION:A delivery eye 4 is parallel moved as shown in an arrow (q) while keeping constant distance between a mandrel main body 1 preset by an X-Y table 12 and this delivery eye. At this time, the delivery eye is moved to the front part of the direction of Y-axis from a point of this time and approached to the circumferential surface part of the outer end part of a pin ring 2 of the mandrel main body 1. In the midway part of access, roving 6 impregnated with synthetic resin exists still between the pins 2a. In a state wherein access is completed, transfer to the direction of Y-axis is stopped. The delivery eye is stopped in the following pin 2a. When stopping is completed, the delivery eye 4 is retreated to the original reciprocating position at this time. Thereafter it is made a state engaged with the pin 2a and therefore it is transferred to the direction shown in an arrow (r) and returned. The same actuation is performed in the end part 1B of the left side.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a filament winding molding method for forming fiber-reinforced synthetic resin products and the like.

(Prior art) For example, carbon fiber is manufactured by heat-treating cellulose or polyacrylonitrile at high temperatures, but it has high heat resistance and a specific gravity lower than that of aluminum or glass fiber, and when combined with plastic, it can be produced by heating steel or polyacrylonitrile. It has a strength comparable to that of

For these reasons, attempts have recently been made to form long molded products such as automobile drive shafts by filament winding carbon fibers (long fibers) (for example, Japanese Patent Publication No. 1983-1999). 3
(See Publication No. 9102).

Filament winding molding of such long-sleeved products has been conventionally performed, for example, in Figs.
As shown in Japanese Patent Publication No. 15), a mandrel body 1 prepared in accordance with a molded product is rotatably supported via a predetermined rotation shaft 3, and the mandrel body 1 is
Both ends I A of .

A plurality of pins (locking protrusions) 2a, 2a, etc. are provided on the outer periphery of the IB (IB is not shown) that protrude at predetermined intervals in the radial direction, and on the other hand, a delivery system in which reinforcing fibers 6' in a roving state are fed out - The eyes 4 are arranged oppositely to each other so as to reciprocate in parallel along between both ends IA and IB of the mandrel body 1.

During molding, the mandrel main body l is rotated around the rotating shaft 3 at a predetermined circumferential speed, while
In synchronization with this, the delivery eye 4 is moved from side to side, and is wound around the outer circumferential surface 1a of the mandrel body 1 at the center, while reinforcing fibers 6 are sequentially wound at both left and right ends lA, lB.
' is locked to the pins 2a, 2a, etc. and then folded back to form an m-fiber reinforced layer having a synthetic resin as a matrix.

(Problem to be Solved by the Invention) However, in the conventional molding method described above, if the number of left and right pins (locking protrusions) is small, it can be folded back relatively easily, but on the other hand, if the number of pins increases, For example, as shown in FIG. 5, the gap P where the reinforcing fibers 6' enter becomes very narrow, and the reinforcement 1n! The fiber 6' gets stuck in the pin 2a and comes apart. There is one problem. For this reason,
Conventionally, a method has been adopted in which the delivery eye 4 is moved to the outside of the shaft and locked as shown in FIG. 4, but this method is extremely inefficient.

In addition, when the winding angle θ is small, for example, as shown in FIG. 6, in order to avoid interference with the pins 2a, 2a, etc., the delivery eye 4 is connected to a plurality of pins as shown in FIG. It becomes necessary to traverse to point B', which is considerably farther away than the position of the pin ring 2 where 2 a, 2 a, etc. are provided. Therefore, the size of the molded product (length, thickness)
The molding equipment becomes larger in comparison, and the excess fiber fiL must be pulled back by the traverse distance a or unnecessarily wrapped around the mandrel body 1, and the material may be damaged (fuzz) or unnecessary when pulled back. There are problems that lead to various disadvantages such as material loss due to the winding needle, an increase in cost, and inefficiency in the forming operation.

Such disadvantages are due to the reciprocating position of the delivery eye 4 and the central axis o-o of the mandrel body 1.
' The larger the distance W is, the larger the distance W becomes.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above problems, and includes a plurality of locking protrusions for folding back the filament member at both ends, and a predetermined circumference. A delivery eye is used to reciprocate parallel to the central axis of a long-axis mandrel that is rotationally driven at a high speed, thereby passing a predetermined filament member between the locking protrusions at both ends of the mandrel. In the filament winding molding method in which a fiber-reinforced layer is formed on the outer peripheral surface of the long-axis mandrel, the delivery eye is configured to be movable forward and backward with respect to the mandrel, and the delivery eye is located at the center of the mandrel. After the delivery eye is moved to a predetermined position on the outer end side from the one-end side locking protrusion position by reciprocating motion parallel to the axis, the delivery eye is brought close to the mandrel at a moving speed equal to the rotational circumferential speed of the mandrel; When the filament member extending from the delivery eye is completely locked to the locking protrusion by the rotation of the mandrel that is carried out in parallel with the approach, the mandrel is retreated from the position where it approached the mandrel to the original reciprocating position, and then It is characterized by being traversed toward the side.

(Function) In the above filament winding molding method of the present invention, when the delivery eye is traversed to the outer end of the predetermined position beyond the locking protrusion at the end of the mandrel main body, the mandrel is further moved from the previous reciprocating position. The mandrel is brought as close to the main body side as possible at a speed equal to the rotational circumferential speed of the mandrel main body.

As a result, in synchronization with the approach, the filament member is wound up at the same tension by the distance of the rotational circumferential surface of the mandrel main body within the approach time without traversing the delivery eye further to the outer end surface than the position. Furthermore, due to the approach of the delivery eye toward the mandrel, the distance (length) of the extension line of the winding angle of the filament member to the delivery eye is greatly shortened, so essentially unnecessary winding portions are almost completely eliminated. There will be no.

Furthermore, since the delivery eye approaches only after passing the locking protrusion, there is no risk of interference with the locking protrusion, and if the gap between the locking protrusions is narrow, It also becomes possible to perform the locking operation sufficiently.

(Effects of the Invention) Therefore, according to the filament winding molding method of the present invention, the reciprocating distance (traverse distance) of the delivery eye can be shortened, and the molding apparatus itself can be downsized. Since the amount of unnecessary winding of the filament material is reduced, there is no wastage of material and it is possible to reduce costs.Furthermore, the movement stroke of the delivery eye is reduced, and unnecessary winding work of filament material is eliminated. Since this is no longer necessary, molding work efficiency is also improved.

(Embodiment) FIGS. 1 to 3 show a filament winding molding method and a filament winding molding apparatus for carrying out the same molding method according to an embodiment of the present invention.

First, FIG. 1 shows the overall structure of the above-mentioned molding apparatus, and reference numeral 1 in the figure represents a mandrel body rotatably supported by a rotating shaft 3 in the direction of arrow (A). The mandrel main body 1 is configured to form a drive shaft of an automobile, for example, and has a predetermined long shaft shape. And both left and right ends LA,
On the outer circumferential surface of 1B, the same number of pins 2a are provided.
, 2a, . . . 2b, 2b, . Each of these pins 2a, 2a...
, 2b, 2b, . . . are attached via pin rings 2, 2. Further, the end of the rotating shaft 3 is connected to a predetermined rotational drive source (motor) (not shown) so that it can be rotated at a predetermined circumferential speed.

On the other hand, reference numeral 4 denotes the delivery eye main body 1 as described later.
A roving made of, for example, carbon fiber, which is impregnated with a thermosetting synthetic resin as a matrix material through a synthetic resin impregnating tank 5 provided on the upper part of the mandrel and composited, is then drawn out on the outer circumferential surface la of the mandrel body l. It is a delivery eye that is continuously wound in a scroll shape. The delivery eye 4 is provided at the tip of an arm 11 that projects from the front of a box-shaped delivery eye main body 10 toward the mandrel main body 1.

The delivery eye main body 10 is installed on a predetermined XY table 12, and the axis o of the mandrel main body l is
-o', and a forward and backward movement in the Y-axis direction, approaching in a direction orthogonal to the axis o-o' of the mandrel body 1 and retreating in the same direction. It can be done voluntarily and freely.

Next, a filament winding molding method according to an embodiment of the present invention using the filament winding molding apparatus having the above configuration will be described in detail with reference to FIGS. 2(a) to (e).

First, for example, the right end of the mandrel main body 1 has been folded back at a predetermined pin 2b, and then the mandrel is rotated several times and the delivery eye 4 is newly attached to the left end IA of the mandrel main body 1. Assume that the state shown in FIG. 2(a) is when the position beyond the pins 2a, 2a, . . . is reached. To this position, the delivery eye 4 moves in parallel as shown by the arrow (b) while maintaining a constant distance from the mandrel body 1 set by the XY table 12.

However, once the delivery eye 4 reaches the position shown in FIG. 2(a), unlike the conventional case, the delivery eye 4 is moved forward in the Y-axis direction, and the delivery eye 4 is moved forward in the Y-axis direction as shown in FIG. 2(b). It is brought close to the peripheral surface of the outer end of the bottle ring 2 of the mandrel body 1. At this time, the approaching speed of the delivery eye 4 is controlled to a moving speed equal to the rotational circumferential speed of the mandrel body 1.

During the approach, the roving 6 impregnated with synthetic resin is still between the bins 2a, 2a, but when the approach is completed (up to just before contact), the movement in the Y-axis direction is stopped. As a result, as the mandrel body l rotates, it eventually comes to be locked to the next pin 2a as shown in FIG. 2(C).

When the locking is completed, the deliverer J-eye 4 is moved back to the state shown in FIG. 2(d) (original reciprocating position).

After that, when a predetermined period of time has passed, the three pins 2a, 2
a and 2 a, so at this point it is moved in the direction of the arrow (e) (to the right) and turned back as shown in FIG. 2(e). The same operation is naturally performed on the left side end IB of the mandrel body 1, and by repeating these operations, filament winding is performed continuously and the forming is completed.

As can be understood from the above explanation, the winding angle θ of the roving 6 with respect to the outer peripheral surface 1a of the mandrel body 1 is determined by the rotational speed of the mandrel body 1 and the delivery eye 4.
It is determined by the reciprocating speed (traverse speed) of

For example, as shown in FIG. 3(a), in order to wind the mandrel body 1 and the roving 6 from the contact point A to the point A' at a constant winding angle θ, the delivery eye 4 is
It is necessary to traverse from point B to point B'. This has led to waste of material in conventional molding methods, and is also a cause of the necessity to increase the size of molding equipment.

However, if a configuration is adopted in which the delivery eye 4 approaches the zero point from point B as shown in FIG. Even though it can be rolled, the traverse distance in the left and right direction is only up to point B, and compared to the conventional forming method, the stroke amount Δl and roving amount ΔL from point B to point B' are ultimately saved. It will be possible.

Therefore, the result is miniaturization of molding equipment, material cost savings,
Effects such as speeding up the molding work can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an apparatus for implementing a filament winding molding method according to an embodiment of the present invention, and FIG. 2(a)
~(e) are process diagrams showing the forming process of the filament winding molding method using the same apparatus, FIGS. 3(a) and 3(b) are explanatory diagrams showing the operating principle of the above embodiment, and FIG. FIG. 4 is a front view of the molding apparatus showing the drawbacks of the conventional filament winding molding method, FIG. 5 is a side view of the same, and FIG. 6 is an explanatory view of the same. 1 II...Mandrel body 1a...Outer peripheral surface 2a+ 2b...Bin 3...Rotating shaft 4...Delivery eye 5...Synthetic resin impregnation tank 6...Roving 10...Delivery eye Main body part 11... Arm part 12... X-Y table 2 Figure 4 Figure 5 ( ) Figure 6

Claims (1)

[Claims] 1. A mandrel with a plurality of locking protrusions for folding back the filament member is provided at each end, and is reciprocated parallel to the central axis of the long shaft-shaped mandrel, which is driven to rotate at a predetermined circumferential speed. In the filament winding molding method in which a fiber reinforced layer is formed on the outer peripheral surface of the elongated mandrel by using a delivery eye that passes the filament member between the locking protrusions at both ends of the mandrel, The delivery eye is configured to be movable forward and backward with respect to the mandrel, and after the delivery eye moves to a predetermined outer end side from the one end side locking protrusion position by reciprocating movement parallel to the center axis of the mandrel, the delivery eye is brought close to the mandrel at a moving speed equal to the rotational circumferential speed of the mandrel, and when the filament member extending from the delivery eye is completely locked to the locking protrusion by rotation of the mandrel performed in parallel with the approach. A filament winding molding method characterized in that the filament is moved back from a position approaching the mandrel to the original reciprocating position, and then traversed toward the other end.