JPS6241809B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming and wrapping a tape-like material.

A conventional method for forming and wrapping a tape-like material is as shown in FIG.
After molding, a method is adopted in which the guide 4 is pushed through the entrance of the guide 4, which is equipped with a brake 3 at the exit, to reduce the pitch, and the guide 4 is sequentially pulled out from the guide exit and wound around the outer periphery of the core material 5.

In this method, the molded material with a reduced pitch is pulled out from the guide outlet and wrapped around the outer periphery of the core material. It is necessary to wrap the molded material around the core material 5 under a tension that does not restore the core material, in other words, under a very low tension, and because of the restriction of low tension, it has not been possible to improve the winding speed. Furthermore, since the speed of the molded material drawn out from the guide outlet is slow, the speed at which the tape-shaped material is formed and pushed by the spur gear device 2 is inevitably limited and slow, resulting in very poor productivity.

The present invention has been made to address these conventional problems, and its purpose is to provide a method for efficiently forming a tape-like material and wrapping it around a core material without pitch fluctuation.

The gist of the present invention to achieve the above object is to provide a mold rotating body having a plurality of pins implanted in a ring shape on the side end surface, and a press mold having at least two press molds on the outer periphery thereof. A wave-forming device consisting of a rotating body is arranged around the core material, and the tape-shaped material wound around the pin is shaped by a pressing operation of a push die, and then an intermittent movement between the wave-forming device and the core material is performed. This method of forming and wrapping a tape-like material is characterized in that the forming material is wound around a core material by rotation and relative intermittent movement of a wave forming device in the axial direction of the core material.

The embodiments shown in the drawings will be described in detail below.

In FIGS. 1 and 2, reference numeral 11 denotes a pressing die rotating body, 12 a die rotating body, and 13 a housing.

The push type rotating body 11 has a bearing 14 in the housing 13.
The die rotating body 12 is attached to one end of a hollow shaft 16 which is rotatably supported by a bearing 15 on the push die rotating body 11, and the transmission wheel is attached to the other end of the hollow shaft 16. Due to the driving force transmitted through the shaft 17, the shaft rotates integrally with the hollow shaft 16.

Cylinders 19a and 1 held by support stands 18a and 18b are provided on the side end surface of the push-type rotating body 11.
9b, and guide grooves 21 for guiding the press dies 20a, 20b installed at the tips of the cylinders 19a, 19b are provided at a predetermined angle (30 degrees in the embodiment).

22 is a tension spring that links the support stand 18b and the stand 23 fixed to the housing 13, and 24 is a positioning stopper for the push-type rotating body 11 fixed to the housing 13.

On the side end surface of the mold rotating body 12, pressing mold guide grooves 25 are cut at equal pitches around the entire circumference (in the embodiment, divided into 12 equal parts), and on the inner diameter side between the guide grooves 25, a pin 26 is formed in an annular shape. It is planted in.

The molding device configured as described above is disposed around the core material P which rotates intermittently, and the hollow shaft 16 of the molding device is connected to a drive device (not shown), such as an air cylinder, and a well-known interlocking mechanism. , and the actuation of the drive unit at a predetermined angle (in the example)
30°) intermittently, and
This molding device is installed on a moving cart 27 that moves intermittently in the axial direction of the core material.

When carrying out the method according to the present invention using the apparatus described above, first, the tape-like material 1 unwound from the reel is wound onto the pin 26 of the mold rotating body 12, and its tip is centered. The material P is clamped, and in this state, the pressing die 20 is moved downward by the cylinder 19a.
At the tip of a, attach the tape-shaped material 1 on the pin 26 to the core material P.
Press and bend the cylinder 19b toward the axis of the cylinder 19b.
The pressing die 20b is moved downward to press and bend the tape-shaped material in the same manner as described above (see FIG. 3 A, I, and C).

When this operation is finished, the molding device and the core material P are rotated in the same direction by the same angle, that is, 30 degrees, by the drive device not shown, while the pressing dies 20a and 20b maintain the tape-like pressing and bending state. (3rd
(See Figure E). Next, cylinders 19a and 19b are simultaneously moved upward to push both press dies 20a and 20b into position with pin 26.
Pull it out further outward (at this time, the double pressing die 20a,
The guide piece 20' attached to 20b comes off from the guide groove 25. ) The cylinders 19a and 19b are returned to their original positions by the tensile force of the tension spring (see Fig. 3, E and F). At this return position, when the cylinder 19a is actuated by the same operation as described above,
The press die 20a is pushed into the molded part formed by the press die 20b in the previous step and holds the molded material. Subsequently, when the cylinder 19b is operated, the unformed portion of the tape material is pressed down by the press die 20b and molded, and after that, the above operation is repeated.

On the other hand, the movable cart 27 moves in the axial direction of the core material by 1/N of the tape width W of the driving device (not shown) at the same time as the forming device and the core material P rotate intermittently by 360°/N (N is the number of pins). As a result, the molding material is wound around the core material P in a spiral manner. When the movable cart reaches a predetermined stop position, the required wrapping operation is completed by cutting the molded material.

As described in detail above, by carrying out the forming/wrapping method of the present invention using the above-described apparatus, the intended purpose of the invention can be reliably achieved.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the forming apparatus, FIG. 2 is a front view, and FIG. 3 is a process explanatory diagram of the forming/wrapping method of the present invention. FIG. 4 shows a schematic side cross section of a conventional device. 11...Press mold rotating body, 12...Mold rotating body, 1
3... Housing, 14, 15... Bearing, 16...
...Hollow shaft, 17...Transmission wheel, 18a, 18b...
Support stand, 19a, 19b...Cylinder, 2
0a, 20b...Press die, 21, 25...Guide groove, 22...Tension spring, 23...Stand, 24
...Positioning stopper, 26...Pin, 27...
Mobile trolley, P... Core material.

Claims (1)

[Claims] 1. A wave forming device consisting of a mold rotating body having a plurality of pins planted in a ring shape on the side end surface and a pressing mold rotating body having at least two pressing molds on its outer periphery is arranged around the core material. Then, the tape-shaped material wound around the pin is shaped by a pushing operation of a press mold, and then the wave-forming device and the core material are intermittently rotated, and the wave-forming device is moved relative to each other in the axial direction of the core material. A method for forming and wrapping a tape-like material, characterized in that the forming material is wound around a core material.