JPH0212739B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for manufacturing a cylindrical film with an articulating tool made of synthetic resin.

<Prior Art> For example, as shown in FIG. As shown in the figure, it is formed from a cylindrical film 4.

When extruding this cylindrical film 4 and the male claw 3a and female claw 3b of the articulating tool 3 at the same time, the die includes a die for forming the cylindrical film 4, a slit,
It has a structure in which an annular plate having discharge holes for forming a pair of articulators for forming male and female claws 3a and 3b at predetermined intervals is fixedly provided.

<Problems to be Solved by the Invention> In the bag body 1 formed by the die having the above structure, a pinching allowance 5 is formed over the opening 2 above the articulation tool 3 to open the articulation tool 3 or for other purposes. be done. This picking allowance 5 is the male claw 3a as shown in FIG.
and the female claw 3b, and the length of the picking allowance 5 was determined by the distance l between the fixed forming holes of the male claw 3a and female claw 3b in the conventional die.

However, various sizes may be required for the length of this knob 5 depending on the purpose, such as a hanging type bag with a hole for hanging in the part, a header type bag with a heading, etc. many.

However, in the above-mentioned conventional device, as described above, the interval l between the discharge holes for forming the male claw 3a and the female claw 3b is fixed at a predetermined distance, so that the male and female claws in the film to be formed are The dimension l between them cannot be changed. For this reason, when producing films with interlocking tools having different dimensions for the picking allowance 5, it is necessary to replace the die with another die having the required spacing l each time. It was necessary to prepare many different dies for each die.

In addition, die replacement and setup work are required frequently, resulting in extremely low productivity and high costs.

<Means for Solving the Problems> In order to solve the above-mentioned conventional problems, the present invention provides a die and a slit for extrusion molding a cylindrical film of synthetic resin, and a film for attaching male and female claws to the cylindrical film. In a die equipped with a rotatable annular body for molding an articulating tool and an annular fixing plate that are molded in parallel in the extrusion direction of The fixed plate is provided in correspondence with the die and the slit, and the other nail forming discharge hole is provided in a tongue piece of an annular body having a tongue piece rotatably provided concentrically with the die and the slit. The annular body is provided so as to communicate with the arcuate groove, and has a discharge hole that is slidable with respect to the discharge hole on the fixed plate side, so that the interval between the claw discharge holes can be adjusted.

<Function> The present invention provides a discharge hole for forming one nail provided in a fixed annular plate for forming an articulating tool, and a discharge hole provided for forming the other nail provided in the tongue piece of an annular body having a tongue piece. By rotating and sliding the hole, the distance between the discharge holes for forming both claws is changed, and the spacing between the male and female claws can be arbitrarily adjusted and set within an allowable range.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In Figures 1 and 3, 10
is the die body. This die body 10 is provided with a die and a slit 11 for extrusion molding a cylindrical film of synthetic resin. And this die,
The slit 11 is connected to the outer ring 12 as shown in FIG.
and an annular fixing plate 13 positioned at the inner diameter of the outer ring with a gap therebetween.

The annular plate 13 is provided with a discharge hole 14 connected to the die and slit 11 for extrusion forming the female claw 3b of the articulating tool 3 shown in FIG. 6 together with a cylindrical film.

Furthermore, an annular body 15 is provided on the upper surface of the annular fixing plate 13 and rotates concentrically with the die and slit 11.
A tongue piece 16 having an arcuate end face along the radial direction is provided. The arcuate end surface of the tongue piece 16 is provided with a male claw forming discharge hole 17 for extrusion molding the male claw 3a of the articulating tool 3 together with a cylindrical film.

The rotation operation mechanism of the annular body 15 is
A rotating shaft 29 is provided at the center of the inner diameter of the annular body 15, and an engaging member 24 is provided to protrude in the radial direction from the rotating shaft 29, and the engaging member 24 is engaged with the inner diameter of the annular body 15. The rotational drive mechanism of the rotating shaft 29 includes an operating shaft 30 and a rotating shaft 2 rotated by the handle 27.
9 are connected by a bevel gear 26.
Although the illustrated example shows manual rotation drive using the handle 27, it is also possible to connect an actuator such as a servo motor to the operating shaft 30 to achieve automatic rotation drive.

Further, the tongue piece 16 provided on the annular body 15 includes a plurality of tongue pieces 16a, 16b, 1, as shown in FIG.
6c may be provided protrudingly at equal intervals on the circumference, and male claw forming grooves 17a, 17b, 17c may be provided on the arcuate end surface thereof.

In FIG. 3, 25a and 25b are annular bodies 15
It is a fan-shaped stopper member concentric with the rotation of the second
It is attached to the presser plate 28 of the annular body 15 shown in the figure. The stopper members 25a and 25b are for regulating the rotational movement angle of the engagement member 24 at a required angle. Further, 18 is a resin injection pipe to the die body 10, and the raw resin is supplied from this resin injection pipe 18 to the die, the slit 11, the discharge hole 14 for forming the female claw, and the discharge hole 17 for forming the male claw. There are resin passages 19 and 2 branched from the resin injection pipe 18 to the discharge hole 14 for forming the female nail and the discharge hole 17 for forming the male nail.
0. Note that the discharge hole 17 for forming the male claw is connected to the annular body 15 having the tongue piece 16 through an arcuate groove 23 concentric with the resin passage 20, and this arcuate groove 23 and the resin passage 20 are always in communication with each other. ing. Reference numerals 21 and 22 indicate check valves that control the amount of resin in the resin passages 19 and 20.

Next, the operation of the present invention will be explained. The cylindrical film is formed by the film extruded from the die and slit 11, and at the same time, the female claw 3b
is extruded from the discharge hole 14 for forming the female claw.
The male claw 3a is also extruded at the same time as the cylindrical film through the male claw forming discharge hole 17 provided in the arcuate end surface of the tongue piece 16.

Here, the distance 1 between the male claw 3a and the female claw 3b is freely set within the permissible rotation range of the annular body 15 defined by the stopper members 25a and 25b. That is, when the annular body 15 is rotated and the tongue piece 16 is positioned closest to the fixed female claw 14 side, the male claw 3
The distance l between a and the female claw 3b becomes the smallest, and the female claw 1
4, the distance 1 is the largest. However, as described above, even if the position of the tongue piece 16 is changed, the arcuate groove 23 always remains in communication with the resin passage 20, and resin is supplied to the discharge hole 17 for forming the male claw.

In the above embodiment, the discharge hole 14 for forming the female nail is
is the fixed side, and the discharge hole 17 for forming the male claw is the tongue piece 1.
6 on the movable side, even if this arrangement is reversed, the effects of the present invention will not change.

<Effects of the Invention> As described above, according to the present invention, the discharge hole for molding one of the claws of the male and female articulators molded into a cylindrical film is fixedly provided on the annular plate side for molding the cylindrical film, The discharge hole for forming the other claw is movable and provided in a tongue piece of an annular body that rotates along the die and slit. Therefore, by simply changing the rotational position of the annular body with a tongue piece, the spacing between the male and female claws of the articulator can be changed arbitrarily and molded using the same die, and there is no need to change the molds as in the conventional method. Changeover between cylindrical film molding with different spacing between male and female claws, that is, different lengths of picking allowances, can be performed quickly according to requirements without the need for setup or replacement, which improves productivity and improves productivity. It has the effect of being able to adequately handle high-mix, low-volume production.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a die body showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view, FIG. 3 is a partially cutaway plan view, and FIG. 4 is a perspective view showing an example of a change in the design of the annular body.
FIG. 5 is a sectional view of the bag body with the articulating tool, and FIG. 6 is a sectional view of the cylindrical film with the articulating tool. 3... Articulating tool, 3a... Male claw, 3b... Female claw, 10...
Die body, 11...Die, slit, 14...Discharge hole for forming female nails, 15...Annular body, 16...Tang piece, 17
...Discharge hole for forming male nails.

Claims (1)

[Claims] 1. A die and slit for extrusion molding a cylindrical synthetic resin film, and a rotatable annular body and annular fixing device for forming an articulating tool for forming male and female claw articulating tools on the cylindrical film in parallel in the extrusion direction of the film. In the die, a discharge hole for forming either the male or female claw of the articulating tool is provided in the annular fixed plate in correspondence with the die and the slit, and the discharge hole for forming the other claw is provided in the die and the die for forming the other claw. A tongue piece of an annular body having a tongue piece rotatably provided concentrically with the die and the slit is provided so as to correspond to the die and the slit and communicate with the arcuate groove,
An apparatus for manufacturing a cylindrical film with an engaging tool, characterized in that an annular body having a discharge hole is slidable relative to the discharge hole on the fixed plate side, and the interval between the two claw discharge holes is adjustable.