JPH0427530A - Filament winding molding apparatus - Google Patents

Abstract

PURPOSE:To keep the quality of a molded product high and to shorten a required molding time by providing a roving delivery control means absorbing the fluctuation of the delivery speed of roving from a delivery eye and controlling the passing speed of the roving in a resin impregnating part so as to keep the same almost constant between the resin impregnating part and the delivery eye. CONSTITUTION:A roving delivery control means 30 absorbing the fluctuation of the delivery speed of roving 10 from a delivery eye 27 to control the passing speed of the roving 10 in a resin impregnating part 12 so as to keep the same almost constant is provided between the resin impregnating part 12 and the delivery eye 27. By this method, it is prevented that the impregnation of the roving 10 with a resin becomes insufficient and a required molding time is shortened up to a limit.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a filament winding forming device,
In particular, the present invention relates to a filament winding molding device that aims to stabilize the passing speed of the roving in the resin-impregnated portion.

(Prior Art) In recent years, in order to meet the demand for weight reduction in automobiles and the like, there has been a demand for high-strength and lightweight members, and various composite materials have been actively developed. Among them, the filament winding molding method is suitable for FR of cylindrical bodies suitable for mass production.
It is widely known as the P molding method. This is a method in which rovings made of bundles of reinforcing fibers, such as resin-impregnated glass fibers, are wrapped around the outer circumferential surface of a cylindrical or rod-shaped molding core called a mandrel at a constant tension, and are laminated. It is relatively easy to obtain the strength and directionality of a molded product.

The filament winding forming device that implements the above method basically consists of a mandrel that holds one end of the roving and rotates around its long axis, and a mandrel that guides the roving and moves it back and forth in a direction parallel to the long axis of the mandrel. The delivery eye is composed of a delivery eye, and a resin impregnating section that impregnates the roving sent to the delivery eye with resin.

Note that Japanese Patent Application Laid-Open No. 63-30234 discloses a filament winding forming apparatus as described above, which is configured to be able to control the tension of the roving.

(Problem to be Solved by the Invention) In the above filament winding forming apparatus, when the moving direction of the delivery eye is reversed and the winding direction of the roving around the mandrel is changed, the movement of the roving from the delivery eye is changed. Feeding speed fluctuates.

In particular, when the roving is folded back at a steep angle on the outer circumferential surface of the mandrel and the roving is hung on a hanging bin installed at the end of the outer circumferential surface, the delivery
There also occurs a period in which no roving is fed out from the eye, and the fluctuation in feeding speed becomes extremely large.

In the conventional filament winding molding apparatus, fluctuations in the feeding speed of the roving directly lead to fluctuations in the passing speed of the roving in the resin-impregnated portion. There is an upper limit value for the passing speed of the roving in this resin-impregnated part, which is determined depending on the viscosity of the resin and wettability with the roving, etc., and if the passing speed changes due to the above reasons and exceeds this upper limit value, , impregnation of the resin into the roving becomes insufficient. If this happens, the quality of the molded product will deteriorate.

On the other hand, in order to eliminate such problems, if the speed at which the roving is fed out from the delivery eye is set to be low overall, the time required for molding will become longer.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a filament winding molding device that can maintain high quality of molded products and, at the same time, shorten the required molding time to the utmost. The purpose is to

(Means for Solving the Problems) A filament winding molding apparatus of the present invention includes a mandrel as described above, a delivery eye, and a resin-impregnated part. between the roving eye and the roving delivery eye, absorbing variations in the feeding speed from the roving eye,
The present invention is characterized in that it is provided with a roving payout control means that controls the passage speed of the roving in the resin-impregnated portion to be substantially constant.

(Operation and Effects of the Invention) As described above, if the passing speed of the roving in the resin-impregnated portion is kept approximately constant, this passing speed will not fluctuate greatly, so that the impregnation of the resin into the roving becomes insufficient. can be prevented from happening.

In addition, if there is no fluctuation in the passing speed, no problem will occur even if the passing speed is set to the upper limit or a value close to it, so in this way, the time required for molding can be shortened to the utmost. becomes possible.

(Embodiment) FIG. 1 shows the basic configuration of a filament winding forming apparatus according to an embodiment of the present invention. The roving 10 stored in a wound state is placed on a feed-out speed detection roller 11, then placed on two rollers 13 and 14 in the resin impregnation tank 12, and guided to a fixed roller 15. A resin 1B is stored in the resin impregnation tank 12, and as the roving 1o passes through the resin impregnation tank 12, the roving 10 is impregnated with the resin 16.

Two fixed rollers 15 are arranged coaxially, and the roving 10 is hung on one fixed roller 15 and guided downward, hung on a dancer roller 17 and sent upward, and then placed on the other fixed roller 15 and guided downward. It is hung on a fixed roller 15 and guided to a tension controller 18. The above dancer
The roller 17 is rotatably held by a dancer arm 19, and the dancer arm 19 is supported so as to be swingable in the direction of arrow A about a swing shaft 20. The dancer arm 19 is reciprocated in the direction of the arrow A by a swinging mechanism driven by a stepping motor 21, and absorbs the difference in the feed speed of the roving lO between the upstream and downstream sides of the fixed roller 15. Note that this point will be explained in detail later.

The tension controller 18 has two rollers 22.2
3, and a dancer arm 24 which rotatably holds these rollers 22, 23 at both ends. This dancer arm 24 is able to swing in the direction of arrow B about the center position of the roving.
Adjust the tension at 0. Note that this dancer arm 24 has a built-in sensor 25 that detects its swinging position.

The roving 10 that has passed through the tension controller 18 is guided by a guide roller 26 and delivered to the delivery eye 27.
and is wound around the outer peripheral surface of the mandrel 28.

That is, the mandrel 28 holding the tip of the roving 10 is rotated in the direction of arrow C about its long axis 29, and at the same time the delivery eye 27 is rotated around the long axis 29.
By being reciprocated in a direction parallel to the roving 10, the roving 10 is helically wound on the outer peripheral surface of the mandrel 28.

In this embodiment, locking pins 28a are provided upright on both left and right ends of the outer circumferential surface of the mandrel 28, and are lined up at a predetermined distance in the circumferential direction, and the roving 10 is hung on the locking pins 28a and folded back. It is now possible to

The rotational speed of the stepping motor 21, which swings the dancer arm 19 back and forth, is basically controlled by a control circuit 30 consisting of, for example, a microcomputer based on a predetermined program. The output S1 of the dancer arm position sensor 25 described above is input to the control circuit 30, and the rotational speed of the stepping motor 21, that is, the swinging of the dancer arm 19 is controlled so that the tension of the roving 10 is within a predetermined range. The speed is finely adjusted.

Further, the feeding speed detection roller 11 has a roving l.
A sensor 31 for detecting the delivery speed of O is connected, and the output S2 of this sensor 31 is also input to the control circuit 30.

The control circuit 30 constantly monitors the feeding speed of the roving 10, which is indicated by this output S2, and if this speed deviates from a predetermined range, it is assumed that an abnormality such as cutting or catching of the roving 10 has occurred, and the device is bring the whole thing to a halt.

Next, the operation of the dancer roller 17 will be explained in detail. As shown in Figure 3, 1: Length of roving winding (distance between hanging bins) α: Angle D of roving winding, mandrel diameter ω: Mantrels rotation speed d: Delivery from the contact point of mandrel and roving. Distance to the eye■: Movement speed of the delivery eye y: Distance R between the center P of the fixed roller 15 and the center Q of the dancer roller 20: Center Q of the dancer roller 20 and the dancer arm 19
Distance a from the swing center S of the fixed roller 15: Distance θ between the center P of the fixed roller 15 and the swing center S of the dancer arm 19: Angle of the dancer arm (the circumference is positive).

In Figure 3, 1. <When in the state of QSP-90', y
-J-cho 1T-cho 7. From this state, the dancer arm 19 swings at an angle θ, and when Q moves to Q'', the distance between PQ' is yo
Then, y' = (a-Rsinθ) ” + (ReO
2θ)2-a +R-2aRsin θ-
(++At this time, the absorption amount of roving ■0 is b-2
(y-y) Therefore, y" -b/2+y =-b/2+J-cho "lower 1-cho.Substituting this into equation (1), we obtain the following.

The delivery eye 27 is located at the left end position K shown in FIG.
Move to the right from O, move the winding start shown in Figure (2) to position K1 (a position that matches the arrangement of the locking pins 28a), and move the steady winding shown in Figure (a) to the start position (the winding angle is α). initial position) K2
It reaches the winding end position (right end position) K3, then reverses and moves to the left, and reaches the winding start position 4 in the opposite direction. Therefore, the first volume describes the movement of the dancer arm 19 in the cycle, considering the cycle (one way only) as the period from the above-mentioned position Kl to the position 4 of the delivery eye 27. . In this example, when the delivery eye 27 is at position 1, the required length of the roving 10 in the cycle is θ-0, as is clear from FIG. 2 (1). =11cos
a ten (d/stn a-d) - fl/cos a+d
(1/sin a-1). In addition, for one winding, the required cycle time T is 'r-4 tan a/yrDω +d (1/sin a-1) /yrDωπDω Here, the roving 10 is transferred from the resin impregnation tank 12 to the delivery eye 27 side at an average speed x - If it is sent at L/T, the roving lO will be used in just the right amount.

That is, the passing speed of the roving 10 in the resin-impregnated NIL 2 may be kept constant at x-L/T fltan α+d (1/sin a-1).

(Delivery eye 27 is in position!→2 period) If the elapsed time from the beginning of winding of the roving 10, that is, the delivery eye 27 is in the first position, is shown as t, then in this period, the delivery - The length of the roving fed out from the eye 27 is Jτ + (vt lower go d), while the roving 10 in the resin impregnation tank 12
The passage length of is xt. Therefore, dancer arm 1
The length b of the roving 10 that should be absorbed by the roving 9 is b=v'-d-xt. By substituting this into equation (2) above, the angle θ to be controlled with respect to time t can be found. Here, the constants other than time are determined by the filament winding molding device and the molded product, so A>, B1, C
I, Dl, El % With Fl as a constant, in this case, θ-Ait2 10B1 t+C, Da'D stone 7-〒-+E
This means that the control should be l+F1.

(Delivery eye at position 27, period 2-1-3)
During this period, the length of the roving fed out from the delivery eye 27 is equal to the length of the wrap.

Therefore, this feeding length is v t /cos, where tz is the time when the delivery eye 27 is in position 2.
a − v t 2 /cosα= (t tz )
v/cos a. On the other hand, the passage length of the roving 10 in the resin impregnation tank 12 is x(t tz). Therefore, the length b of the roving 10 that the dancer arm 19 should absorb is b=(t-tz)v/cos a-x(t
−tz )=(ttz) (v/cos
a-x) Therefore, similarly to the case where Kl- is 2, the angle θ to be controlled with respect to time t is A 2 , B Z
, C2 is a constant, θ-A2 tz +B2 t+Cz.

(Delivery eye 27 position or 3-1- period)
During this period, the length of the roving delivered from the delivery eye 27 is O (zero). On the other hand, resin-impregnated V
The length of passage of the roving 10 at j12 is x(t-t3), where t3 is the time when the delivery eye 27 is in position 3. Wanted Dancer Arm 1
The length b of the roving IO to be absorbed is b--x(t t3) From this, as in the two cases described above, the angle θ to be controlled with respect to time t is A3, B3, C3. With θ-A3 tz +B3 as a constant, θ-A3 tz +B3 becomes 10C3.

If the angle θ of the dancer arm 19 is controlled in each period as explained above using the control circuit 30 and the stepping motor 21 described above, the passing speed of the roving 10 in the resin impregnation tank 12 is made constant, and the roving 10 is The mandrel 28 is supplied with just the right amount.

To give one numerical example, a=300 mmmm5R
= 200, the length b of the roving 10 to be absorbed = 3
When 0 mm, from equation (2) above, θ-! It becomes 5.3″′.

In addition, three rows of fixed rollers I5 shown in FIG. 1 and two rows of dancer rollers 17 are provided, and R-3
00mm, a-200mm, ym300mm.

D-70mm%1-1000mm, a-150Sd-
55mm 1ω-0.25 revolutions/sec (v = 205.1
An example of the relationship between the length of the roving delivered from the delivery eye 27 and the dancer arm angle θ is shown in FIG. If the dancer arm angle θ is controlled as shown in the figure by the control circuit 3Q and the stepping motor 21, the roving IO will be supplied to the mandrel 28 in just the right amount.

The one-dot chain line in Naoko's FIG.
Matches the roving payout length from.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the basic configuration of a filament winding forming apparatus according to an embodiment of the present invention, and FIG. 2 shows the position of the delivery eye in the filament winding forming apparatus and the roving winding around the mandrel. FIG. 3 is a schematic diagram showing the essential parts of the filament winding forming apparatus, and FIG. 4 is a relationship between the length of the roving fed out from the delivery eye and the dancer arm angle. It is a graph showing an example. 10... Roving 12... Resin impregnation tank 1
5...Fixed roller 16...Resin 17...
・Dancer Laura 19...Dancer Arm 2
1... Stepping motor 28... Mandrel 29... Mandrel long shaft 27... Delivery eye 28a... Latching pin 30... Control circuit diagram

Claims (1)

[Claims] A mandrel that holds one end of the roving and rotates around its long axis; a delivery eye that guides the roving and moves back and forth in a direction parallel to the long axis of the mandrel; A filament winding molding apparatus comprising a resin impregnated part that impregnates the roving sent to the eye with resin, and configured to wind the resin-impregnated roving onto the outer peripheral surface of the mandrel, the resin impregnated part and the delivery between the roving eye and the delivery eye, absorbing fluctuations in the feeding speed of the roving from the delivery eye,
1. A filament winding forming apparatus, comprising: a roving payout control means for controlling the passage speed of the roving in a resin-impregnated part to be substantially constant.