JPH11192669A - Method and device for wrapping irregular diameter shaft-shaped preform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the molding pressure to a preform constant all over respective sites of the preform when the irregular diameter shaft-shaped preform is wrapped and improve the chemical properties of the products thus formed. SOLUTION: Both ends of a preform P in the length direction are supported by a preform supporting mechanism 22. The preform P is moved in the shaft direction by a preform transfer mechanism 23 together with the preform supporting mechanism 22. A tape wrapping unit 24 for winding a wrapping tape on the preform during the transfer of the preform P is provided. The preform transfer mechanism 23 is controlled by a control section 25 and the moving speed of the preform P is varied in compliance with the outer diameter of sections of the preform P to be wrapped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for wrapping a preform having a different diameter shaft.

[0002]

2. Description of the Related Art Conventionally, in the production of tapered pipes such as golf shafts and fishing rods, a braider equipped with a tape wrapping device is used, and a braid is formed on a mandrel by braiding. The mandrel having the layer is withdrawn from the blader machine and a tape wrapping device wraps the heat shrink tape over the braided composition layer of the mandrel.

In this case, the speed of pulling out the mandrel from the braider and the speed of wrapping the tape are kept constant, and the lapping is performed so that the pitch of the wrapping on the mandrel is always constant.

However, when lapping is performed on the mandrel so that the lapping pitch is constant, a constant lapping pressure is exerted on the mandrel, and when the shape of the mandrel, particularly, its outer diameter changes with its length, In this case, the molding pressure on the mandrel varies depending on the location of the mandrel. When a difference in molding pressure occurs, the mechanical properties of the finished product decrease because the degree of curing of the fiber (yarn) constituting the braid and the thermosetting synthetic resin impregnated in the yarn differ. Problems arise.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to change the lapping pressure when lapping shaft-shaped preforms having different diameters, so that the molding pressure on the preform can be kept constant over each part of the preform. And to improve the mechanical properties of the obtained product.

[0006]

In order to solve the above-mentioned problems, the present invention is to change the winding speed of the wrapping tape or the moving speed of the preform according to the outer diameter of the preform portion to be wrapped. A method for wrapping a preform of a different diameter shaft is characterized in that the preform is wrapped while changing the wrapping pressure on the preform by changing the winding pitch of the wrapping tape.

[0007] In the above method, preferably, the preform to be wrapped comprises a braid formed on a mandrel by performing braiding using a braider. The material composition guide or the mandrel is heated.

In order to solve the above-mentioned problems, the present invention provides a preform moving means for gripping a preform to be wrapped and moving the preform in an axial direction; Tape wrapping means for winding the tape on, controlling the preform moving means or the tape wrapping means,
An apparatus for wrapping a preform having a different diameter shaft, comprising control means for changing a winding speed of a wrapping tape or a moving speed of a preform according to an outer diameter of a preform portion to be wrapped. It was done.

In order to solve the above problems, the present invention provides a braider for forming a braid on a mandrel, and a mandrel moving means for gripping the mandrel and penetrating through the braider to move the mandrel in the axial direction; Tape wrapping means disposed adjacent to the blader and wrapping a tape over the braided composition layer of the mandrel,
A control means for controlling the mandrel moving means or the tape wrapping means, and changing a winding speed of the wrapping tape or a moving speed of the mandrel in accordance with an outer diameter of a mandrel portion to be wrapped; This is a device for wrapping the. The device preferably comprises means for heating the braid composition guide or the mandrel of the braider.

[0010]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view schematically showing the overall configuration of an apparatus for wrapping a preform of a different diameter shaft according to an embodiment of the present invention. In this example, a mandrel having a braided composition layer immediately after braiding by a braider is assumed as the preform having a different diameter shaft.

As shown in FIG. 1, the apparatus according to the present invention has a structure in which an automatic mandrel replenishing apparatus 1, a plurality of vertical blade units 2, a tape wrapping apparatus 3, and an automatic preform unloading apparatus 4 are sequentially arranged in series. have. Each blader unit 2 has wheels 5,
When the bobbin carrier 6 is replaced with a bobbin, the bobbin carrier 6 can move to the left and right.

In this apparatus, one mandrel M is taken out by the automatic mandrel replenishing device 1 and its rear end is gripped by the chuck 7 of the automatic mandrel replenishing device 1. Thereafter, the chuck 7 moves until the front end of the mandrel M comes out of the working position of the tape wrapping device 3, and in the moving process, the mandrel M is braided sequentially from the downstream blader unit 2, and the mandrel M is moved. After the braid composition layer is formed on the surface, the tape wrapping device 3 winds the wrapping tape on the braid composition layer of the mandrel M.

When the front end of the mandrel comes out of the working position of the tape wrapping device 3, the chuck 8 of the automatic preform unloading device 4 grips the front end of the mandrel M, and the chuck 7 of the automatic mandrel replenishing device 1 moves after the mandrel M. It moves upstream until the end exits the working position of the tape wrapping device 3. During the movement process, the composition and lapping of the braid are subsequently performed.

The apparatus according to the present invention further comprises a control unit 10 for controlling the tape wrapping device 3 and changing the winding speed of the wrapping tape according to the outer diameter of the mandrel portion to be wrapped.

When the rear end of the mandrel M comes out of the working position of the tape wrapping device 3, the chuck 8 of the automatic preform unloading device 4 is opened, and then the cutter 9 moves down to operate, and the rear end of the preform is moved to the rear end. The stretched thread and tape are cut and lowered into place. And
The chuck and cutter return to the standby position.

FIG. 2 is a schematic side view showing the configuration of the blader unit 2 and the tape wrapping device 3 of the apparatus shown in FIG. As shown in FIG. 2, each braider unit 2 is provided with a track surface 11 having a center hole penetrated by a mandrel M, which is provided vertically.
, Two intersecting annular orbits are formed, two sets of bobbin carriers 6 are guided on the annular orbit, and one set of bobbin carriers 6 is moved in one direction along one orbit and the other set. Of the bobbin carrier 6 crosses and travels in the opposite direction along the other trajectory. During this time, the yarn F from each bobbin carrier 6 flows from the bobbin 14 toward the center yarn (composition direction) toward the annular yarn guide 13 of the squeezing guide 12. The yarns F ′ which run straight on the mandrel M are drawn out to form a braid on the mandrel M.

Further, the apparatus according to the present invention has a suitable nozzle 20 for blowing hot air toward the yarn guide 13 for each of the braider units 2. Each nozzle 20
Although not shown, it is connected to a suitable known hot air generator.

In FIG. 2, the tape wrapping device 3 is disposed vertically next to the left (most downstream) blader unit 2 and has a central hole through which a mandrel M is passed. A large gear 16 on which the tape holder 15 is rotatably supported, a driving gear 18 driven by a motor 17 for rotating the same, and a driven gear 19
It is composed of Then, the wrapping tape T is pulled out from the tape holder 15 by rotating the tape holder 15 around the mandrel M, and lapping is performed on the braid composition layer of the mandrel M. In this case, the control unit 10 controls the driving of the motor 17, that is, the rotation speed of the tape holder 15.

According to the apparatus of the present invention, the control unit 10 controls the rotation speed of the motor 17 of the tape wrapping device 3 and hence the rotation speed of the tape holder 15 according to the outer diameter of the mandrel portion to be wrapped, that is, the wrapping. Change the tape winding speed. In this embodiment, since the mandrel M is tapered at a constant angle, the control unit 10 changes the rotation number of the tape holder 15 linearly. At this time, since the moving speed of the mandrel M is kept constant, the wrapping tape T
Is changed, and the mandrel M is wrapped while the lapping pressure on the mandrel M is changed.

As a result, even if the outer diameter of the mandrel M changes, the molding pressure due to lapping becomes constant, and the mechanical properties of the final product are further improved.

In this embodiment, the control unit 10 controls the tape wrapping device 3 while keeping the moving speed of the mandrel M constant, and winds the wrapping tape T around the mandrel M according to the outer diameter of the mandrel M. Although the winding pitch of the wrapping tape T is changed by changing the speed, the wrapping tape T
While keeping the winding speed constant, the control unit 10
The movement of the chuck 7 of the automatic mandrel replenishing device 1 and the chuck 8 of the automatic preform unloading device 4 is controlled,
A configuration in which the winding pitch of the wrapping tape T is changed by changing the moving speed of the mandrel M may be adopted.

In this embodiment, in each of the blade units 2, the yarn guides 13 related from the nozzle 20 are provided.
By blowing hot air (70-80 ° C) on
The thermosetting synthetic resin pre-impregnated with the braiding yarns F and F 'is heated, whereby the thermosetting synthetic resin spreads easily, and each fiber constituting the braiding yarns F and F' spreads easily. Become. For this reason, the braiding yarns F and F ′ are well adapted to the shape of the mandrel M, and the braid formed on the surface of the mandrel M is less likely to have gaps and irregularities. Then, by the subsequent lapping, a gap is hardly generated in the product, and the mechanical properties of the product are further improved.

In this embodiment, the structure is such that hot air is blown from the nozzle 20 to the yarn guide 13. However, the same effect can be obtained by incorporating a heater inside the yarn guide 13 or inside the mandrel.

FIG. 3 is a side view schematically showing an overall configuration of an apparatus for wrapping a preform of a different diameter shaft according to another embodiment of the present invention. As shown in FIG. 3, the wrapping device 21 according to the present invention includes a preform support mechanism 22 that supports both ends in the longitudinal direction of the shaft-shaped preform P, and the preform P together with the preform support mechanism 22 in the axial direction. The preform transfer mechanism 23 to be moved, the tape wrapping unit 24 for winding the wrapping tape around the preform during the transfer of the preform P, and the preform transfer mechanism 23 for controlling the outside of the preform P to be wrapped The control unit 25 changes the moving speed of the preform P according to the diameter. The tape wrapping unit 24
Is fixed at a fixed position with respect to the preform transfer mechanism 23.

The lapping device 21 further includes a machine base 26, on which two base frames 27 functioning as guide rails are provided. The preform support mechanism 22 includes a preform erection frame 29 having a traveling roller 28, a vertical first frame 30 connected to one end 29 a of the preform erection frame 29, and another end of the preform erection frame 29. Part 29
b, a vertical jig 31 connected to the first frame 30, a support jig 32 supporting one end Pa of the preform P, and a jig 32 mounted on the second frame 31, It has a chuck 33 for gripping the other end Pb. Further, the first frame 30 can be positioned and fixed at a desired position of the one end portion 29 a of the preform erection frame 29 by the adjusting screw 34.

The preform transfer mechanism 23 is constituted by a rotatably driven conveyor 35 provided on a machine base 26, and connects the preform support mechanism 22 to the base frame 2.
Along 7, it can be moved from a first position (shown by a solid line in FIG. 3) to a second position (shown by a virtual line in FIG. 3).

The tape wrapping unit 24 has a tape reel 36 rotatably arranged around the preform P, and a motor 37 for driving the tape reel 36 to rotate. Then, the wrapping tape is pulled out from the tape reel 36 by rotating the tape reel 36 around the preform P, and the wrapping is performed on the preform P.

According to the wrapping apparatus 21, the control unit 25 controls the rotation speed of the conveyor 35 of the preform transfer mechanism 23 according to the outer diameter of the preform P to be wrapped, and thus the transfer speed of the preform P. To change. At this time, the rotation speed of the tape reel 36, that is,
Since the winding speed of the wrapping tape is kept constant, the winding pitch of the wrapping tape changes, and the preform P is wrapped while the wrapping pressure on the preform P changes. As a result, even if the outer diameter of the preform P changes, the molding pressure due to lapping becomes constant, and the mechanical properties of the final product are further improved.

[0029]

As described above, according to the present invention, the wrapping tape winding pitch is changed by changing the wrapping tape winding speed or the preform moving speed according to the outer diameter of the preform portion to be wrapped. The preform can be wrapped while changing the lapping pressure on the preform by changing the pressure, so that the mechanical properties of the final product can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing an overall configuration of an apparatus for wrapping a preform of a different diameter shaft according to an embodiment of the present invention.

FIG. 2 is a schematic side view showing a configuration of a braider unit 2 and a tape wrapping device 3 of the device of FIG.

FIG. 3 is a side view schematically illustrating an overall configuration of an apparatus for wrapping a preform of a different diameter shaft according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mandrel automatic replenishing device 2 Blader unit 3 Tape wrapping device 4 Preform automatic removal device 6 Bobbin carrier 7 Chuck 8 Chuck 9 Cutter 10 Control part 11 Track surface 12 Squeeze guide 13 Thread guide 14 Bobbin 15 Tape holder 17 Motor 20 Nozzle M Mandrel T wrapping tape

Claims (5)

[Claims] 1. A wrapping pressure for the preform by changing a winding speed of the wrapping tape or a moving speed of the preform according to an outer diameter of a preform portion to be wrapped. Wrapping the preform while changing the diameter of the preform. 2. The preform to be wrapped,
2. The braid comprising a braid composed on a mandrel by performing braiding using a braider, wherein the braider braid composition guide or the mandrel is heated during the braiding. 3. the method of. 3. A preform moving means for gripping a preform to be wrapped and moving the preform in the axial direction, a tape wrapping means for winding a tape on the preform during the movement of the preform, and Control means for controlling the reforming movement means or the tape wrapping means and changing the winding speed of the wrapping tape or the movement speed of the preform according to the outer diameter of the preform portion to be wrapped. Equipment for wrapping preforms of different diameter shafts. 4. A braider for forming a braid on a mandrel, mandrel moving means for gripping the mandrel and penetrating through the braider to move the mandrel in the axial direction, and the mandrel disposed adjacent to the braider. The tape wrapping means for winding the tape on the braid composition layer, and the mandrel moving means or the tape wrapping means are controlled, and the winding speed of the wrapping tape or the moving speed of the mandrel is controlled according to the outer diameter of the mandrel portion to be wrapped. An apparatus for wrapping a mandrel having a different diameter, comprising a control means for changing the diameter. 5. The apparatus of claim 4, further comprising means for heating the braid composition guide or the mandrel of the braider.