JPH0677973B2 - Manufacturing method of fiber-reinforced resin steering wheel core material - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a fiber-reinforced resin steering wheel core material, more specifically, a resin-impregnated long fiber is formed into a mold by a guide jig of a winding machine. The present invention relates to a method for automatically winding a steering wheel core material.

(Prior Art) The steering wheel core is composed of a ring portion W1, a spoke portion W2, and a boss portion W3, as indicated by reference numeral W in FIG. Conventionally, such steering wheel core material W
In order to manufacture the resin with a fiber-reinforced resin, a dedicated mold was provided, and the resin-impregnated continuous fiber was wound around the mold with a predetermined winding pattern.

FIGS. 5 and 6 show an example of the forming die. The forming die indicated by reference numeral 1 is a disk-shaped first winding die 3 fixed to a rotary shaft 2 and A ring-shaped second winding die 4 attached to the first winding die 3;
And a boss metal fitting 5 attached to one end of a rotary shaft 2 extending through the winding die 3. First, second
A groove having a semicircular cross section is formed on each of the winding dies 3 and 4, and a U-shaped peripheral groove 6 is formed between the winding dies 3 and 4 in the combined state. It has become. Further, the second winding die 4 has cutout grooves 7 formed at three locations in the circumferential direction.

As a result, the molding die 1 is appropriately rotated to wind the resin-impregnated long fiber 8 around the circumferential groove 6, and the circumferential groove 6 is transferred to the boss fitting 5 and the boss fitting 5 is moved to the circumferential groove 6 via the notch groove 7. By winding, the steering wheel core material W shown in FIG. 4 can be integrally obtained.

By the way, recently, a resin-impregnated long fiber 8 for the molding die 1 is used.
Various attempts have been made to automate the winding of the. FIG. 7 shows an example of the system for automatic winding.
Rotation on which an impregnating device 13 for continuously impregnating the continuous fiber 12 drawn from the bobbin 11 with a synthetic resin and a molding die 1 for winding the resin-impregnated continuous fiber 8 drawn out from the impregnating device 13 are placed. A table 14; an articulated robot (hoisting machine) 16 having a guide jig 15 for guiding the resin-impregnated long fibers 8 drawn out from the impregnating device 13 to the molding die 1; A control device 17 for controlling the operations of the rotary table 14 and the robot 16 and a tensioner 18 for applying a predetermined tension to the resin-impregnated long fibers 8 adjacent to the impregnation device 13 and guided to the molding die 1 are roughly configured. ing.

As shown in FIG. 8, the tensioner 18 is positioned between the guide rollers 19 and 19 disposed on the inlet side and the outlet side, respectively, and both of these guide rollers 19, and is attached to the resin-impregnated long fiber 8. It is configured such that the resin-impregnated long fiber 8 can be provided with a tension determined by its own weight. As shown in FIG. 9, the guide jig 15 includes a resin-impregnated long fiber 8 at the tip of a rod-shaped main body 21.
The robot 22 is provided with a hole 22 through which a bolt 24 is attached to a flange plate 23 previously provided at the arm end of the robot 16.
It is fixed in.

With such a configuration, the robot 16 is preliminarily taught, then the long fiber 12 is pulled out from the bobbin 11, and the impregnating device 13,
When it is guided to the mold 1 through the tensioner 18 and the guide jig 15 and the control device 17 is activated, the rotary table 14 is rotated, and the robot 16 is driven in synchronism with this, so that the mold 1 is filled with resin-impregnated long fibers. 8 will be automatically wound.

(Problems to be Solved by the Invention) However, according to the manufacturing method in which the automatic winding is performed, the tension applied to the resin-impregnated long fiber 8 is equal to the tensioner 18.
Therefore, during the transition of the guide jig 15 from the peripheral groove 6 to the boss metal fitting 5 or from the boss metal fitting 5 to the peripheral groove 6 via the cutout groove 7, the resin impregnation is performed. The tension applied to the long fibers 8 is temporarily loosened, and as a result,
A phenomenon occurs in which the resin-impregnated long fibers 8 swell at the branch portion from the ring portion W1 to the spoke portion W2 or from the spoke portion W2 to the ring portion W1. In this case, not only the degree of fiber accumulation (Vf value) in the branched portion is lowered to cause deterioration of mechanical properties, but also the designability is deteriorated, and a fundamental solution thereof has been desired.

(Means for Solving Problems) The present invention has been made to solve the above-mentioned conventional problems, in which a continuous fiber is impregnated with a resin, and subsequently, a guide provided to a robot is provided with the resin. In a method for manufacturing a steering wheel core material having a ring portion, a spoke portion, and a boss portion integrally by automatically winding the jig around a die jig with a predetermined tension, The present invention is characterized in that the tension applied to the long fibers is temporarily increased when shifting to the spoke portion winding portion or from the spoke portion winding portion to the ring portion winding portion.

(Operation) In the method for manufacturing the fiber-reinforced resin steering wheel core material having the above-described configuration, when the guide jig moves from the ring winding portion to the spoke winding portion and from the spoke winding portion to the ring winding portion, the resin-impregnated long fiber Even if temporary tension is applied to the tension applied to the resin, the tension for eliminating this slack is applied to the resin-impregnated long fibers, and it becomes possible to prevent the fibers from bulging at the branch portion. The degree of fiber accumulation increases, and the steering wheel core material has improved mechanical properties as a whole and also improved designability.

(Example) Hereinafter, an example of the present invention is described based on an accompanying drawing.

FIG. 1 shows a basic embodiment of an apparatus for manufacturing a fiber-reinforced resin steering wheel core material according to the present invention. The same parts as those shown in FIGS. 4 to 8 are designated by the same reference numerals, and the description thereof will be omitted. The feature of this embodiment is that a braking device 20 that can apply braking to the resin-impregnated long fibers 8 is arranged along the flow line of the resin-impregnated long fibers 8 from the tensioner 18 to the molding die 1. is there.

The braking device 20 is a drive roller that guides the resin-impregnated filament 8.
A pair of a driven roller 21 and a driven roller 22 is provided, and a brake 24 connected to the drive roller 21 via an arm 23 is provided. A brake shoe (not shown) that engages with the drive shaft of the drive roller 21 is provided at the tip of the arm 23, and the brake 24 has a built-in crank mechanism for retracting the arm 23. That is, the brake shoe provided on the arm 23 by the operation of the brake 24 causes the drive roller 21 to move.
The resin impregnated long fiber 8 is braked by pressing the drive shaft of the.

On the other hand, the brake 24 is connected to the controller 17 of the robot 16 and the signal line 25.
Connected by the signal sent from the controller 17,
The braking timing is controlled. With respect to the braking timing, with respect to the molding die 1 shown in FIG. 2, the guide jig 15 passes from the circumferential groove 6 to the boss metal fitting 5 or the boss metal fitting 5 via the notch groove 7 which is a branch portion of the resin-impregnated long fiber 8. Prediction control device 17 so that braking works when shifting from 5 to the circumferential groove 6
It is set by storing in.

With such a configuration, the winding pattern, the number of windings, and the braking device can be set in advance.
Necessary data such as the braking timing of 20 is input to the controller 17, and the teaching box (not shown) is operated to teach the robot 16. And bobbin 11
The long fibers are pulled out from the fiber, guided through the impregnating device 13, the tensioner 18, and the guide jig 15 to the molding die 1, and one end thereof is fixed to the molding die 1. After that, when the controller 17 is activated, the robot 16
The resin impregnated long fibers 8 are sequentially wound around the molding die 1, and finally the steering wheel core material W having a predetermined shape is wound.
(Fig. 4) is completed.

When the guide jig 15 moves from the peripheral groove 6 to the boss metal fitting 5 or from the boss metal fitting 5 to the peripheral groove 6 via the cutout groove 7 which is a branch portion of the resin-impregnated long fiber 8, a control device 17 is provided. Command to activate the braking device 20 to brake the resin-impregnated long fibers 8, and as a result, the degree of accumulation of fibers at the branching portion is increased and the shape is adjusted.

Here, the specific timing for operating the braking device 20 is
For example, when the guide jig 15 is moved at a speed of 60 cm / sec and the sagging of the resin-impregnated long fibers 8 of 2 to 3 cm occurs when passing through the branch portion, the distance between the center O of the mold 1 and the branch portion A is When the guide jig 15 passes from the notch groove 7 toward the boss metal fitting 5 at a point B separated from the branch portion A by a distance of 1/4,
Apply braking for about 0.05 seconds. As a result, the guide jig 15 advances toward the boss metal fitting 5 by about 3 cm to absorb the slack of the resin-impregnated long fiber 8. On the other hand, when the guide jig 15 is directed from the cutout groove 7 toward the circumferential groove 6 and passes through the point C separated from the branch point A by the same distance as the point B, the same braking as described above is applied.

In the above embodiment, the braking device 20 is constituted by means including the rollers 21, 22 and the brake 24, but instead of this,
For example, as shown in FIG. 3, a fixed shoe 26 and a movable shoe 28 connected to a cylinder 27 are arranged along the moving line of the resin-impregnated filament 8 and the resin-impregnated filament 8 is directly fixed by the operation of the cylinder 27. You can

(Effects of the Invention) As described above in detail, in the method for manufacturing a steering wheel core member according to the present invention, the guide jig is configured such that the guide jig moves from the ring portion winding portion to the spoke portion winding portion or from the spoke portion winding portion to the ring portion. At the time of shifting to the partial winding part, the tension applied to the long fiber is increased to prevent the fiber from loosening,
It is possible to prevent the fibers from bulging at the branching portion, and it is possible to manufacture a steering wheel core material that is excellent in strength and design even when automatically wound by a robot.

[Brief description of drawings]

FIG. 1 is a system diagram schematically showing the entire structure of an apparatus for manufacturing a steering wheel core material according to the present invention, and FIG. 2 is an explanatory diagram showing braking points in relation to a molding die. FIG. 4 is a schematic view showing another embodiment of the braking device, FIG. 4 is a perspective view showing the outer shape of the steering wheel core material, and FIGS. 5 and 6 are front views and side views showing a molding die, and FIG. FIG. 8 is a system diagram schematically showing a general mode of automatic winding, FIG. 8 is a schematic diagram showing a tensioner which is a part thereof, and FIG. 9 is a schematic diagram showing a guide jig. 1 …… Molding die 8 …… Resin impregnated filament 15 …… Guide jig 16 …… Robot (hoisting device) 17 …… Control device 18 …… Tensioner W …… Steering wheel core W1 …… Ring W2 …… Spoke part W3 …… Boss part

Claims (1)

[Claims] 1. A continuous flow long fiber is impregnated with a resin,
Then, in a method of manufacturing a steering wheel core material having a ring portion, a spoke portion, and a boss portion integrally wound around the die jig automatically with a predetermined tension by a guide jig provided to a robot, Fiber-reinforced resin steering characterized by temporarily increasing the tension applied to the long fibers when the guide jig is moved from the ring part winding part to the spoke part winding part or from the spoke part winding part to the ring part winding part. Manufacturing method of wheel core material.