JPS6044129B2 - Slide fastener element manufacturing method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing a series of continuous slide fastener elements by extrusion molding of thermoplastic synthetic resin. It is an object of the present invention to provide a method and apparatus that allow a slide fastener to be taken out from a cavity and molded into the shape of a slide fastener element without deforming it.

The most productive method and device for manufacturing slide fastener elements made of synthetic resin is to manufacture slide fasteners or their materials by extrusion molding using a die wheel in which cavities are continuously formed on the circumferential surface.
Although it has been frequently used recently, it has the disadvantage that the molded slide fastener element or its material has poor shape retention.

According to the method and apparatus of the present invention, the fastener element material having poor shape retention as described above can be taken out from the cavity without being deformed and formed into a slide fastener element.

The configuration of the method and apparatus of the present invention will be explained below based on illustrated examples.

In the method and apparatus of the present invention, in order to obtain a slide fastener element 2 in a fastener linker 1 as shown in FIG. 5, a slide fastener element material 3 having a structure as shown in FIGS. However, for convenience of explanation, below, for convenience of explanation, only one embodiment of the device invention will be described.
The structure of an example will be explained, followed by a detailed explanation of the invention of the method.

1 to 4 show an example of the implementation of the apparatus according to the present invention. In FIG. As shown in FIGS. 6 and 7, a series of cavities 7 for molding the slide fastener element material 3 continuous in a zigzag shape are formed in a series on the peripheral surface 6 of the die. The wheel 5 is actively rotated in the direction of arrow A by a drive device (not shown).

A thermoplastic synthetic resin extrusion nozzle 8 is closely disposed on a part of the circumferential surface 6 of the die wheel 5, and is configured to continuously fill the cavity 7 with the synthetic resin. There is. The synthetic resin filled in the cavity 7 gradually hardens as the die wheel 5 rotates in the direction of arrow A. A scraper 9 is provided opposite to the peripheral surface 6. This scraper 9 has its tip 10 facing the direction of arrow A, which is the rotating direction of the die wheel 5, and as shown in FIGS. It is arranged in contact with the surface 6. A lumen 11 is opened in the scraper 9, and the lumen 11 has an air nozzle 1 opened at the tip 10.
2, the inner cavity 11 is communicated with a compressed air source (not shown), and compressed air is supplied from the air nozzle 12 against the circumferential surface 6 of the die wheel 5 in the direction of rotation of the die wheel 5. It is constructed so that it is blown out in a way that makes it fly.

Referring again to FIG. 1, the slide fastener element material 3 taken out by the scraper 9 is guided to the bending die wheel 16 along a transition path guided by guide rollers 13, 14, 15.

This bending die wheel 16 has a U-shaped groove 17 on the circumferential surface, and in cooperation with the bending wheel 18, the slide fastener element material 3 having the shape shown in FIGS. It is bent into a U-shape around the head portion 19 and formed into the shape of the slide fastener element 2 shown in FIG. A heat setting device 20, a molding device 21, and a cooling device 22 are disposed on the transition path of the slide fastener element 2 after passing through the bending die wheel 16, and the molded slide fastener element 2 in its final form is
It is sent out by the sending device 23.

The method according to the present invention is carried out by the above-mentioned apparatus, in which the cavity 7 of the die wheel 5 is extruded and filled with thermoplastic synthetic resin from the extrusion nozzle 8 to form a continuous slide fastener element material 3. Afterwards, when the resin has hardened, compressed air is blown out from the air nozzle 12 at the tip 10 of the scraper 9 in the counter-rotational direction indicated by the arrow A of the die wheel 5 to remove the slide fastener element material 3. From inside the cavity 7, on the upper surface 24 of the scraper 9, as shown in FIG.
As shown in FIGS. 3 and 4, it is blown up and taken out.
, a molding device 21, a cold ball device 22, etc., and molded into the final shape of the slide fastener element 2.

In the method of the present invention, the slide fastener element material 3 in the cavity 7 is blown up from the cavity 7 by blowing compressed air and taken out onto the scraper 9. When taking out from 7,
The effect is that no extra tension is applied and no deformation occurs.

Furthermore, according to the device of the present invention, by simply adding a structure that blows out compressed air from the air nozzle 12 at the tip 10 of the scraper 9, the easily deformable slide fastener element material 3 can be continuously moved from inside the cavity 7 without deformation. Since the extrusion molding device can be taken out and transferred to the molding device in that state, it has a simple structure and can exhibit effects such as being able to fully utilize the efficiency of the extrusion molding device with high productivity.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of an embodiment of the apparatus according to the present invention, FIG. 2 is an enlarged side view showing a die wheel portion partially in section, and FIG. 3 is an enlarged oblique view of the scraper portion. FIG. 4 is an enlarged vertical sectional view of the scraper portion, FIG. 5 is an enlarged plan view of a slide fastener stringer equipped with a fastener element obtained by the present invention, and FIG. 6 is an enlarged plan view of the slide fastener element material. FIG. 7 is a sectional view taken along the line ■--■ in FIG. 4... Machine base, 5... Die wheel, 6
...Surface, 7...Cavity, 8...
...Extrusion nozzle, 9...Scraper, 10...
... tip, 12 ... air nozzle, forming device: 16 ... bending die wheel,
18... Bending wheel, 20... Heat setting device, 21... Molding device, 22... Cooling device,
A...Rotation direction of the die wheel, P...
- Hardening zone.

Claims (1)

[Claims] 1. After continuously extruding a synthetic resin into a series of cavities formed on the circumferential surface of a continuously rotating die wheel and molding a continuous slide fastener element material, Then, compressed air is blown out from a scraper placed opposite to the rotational direction in a direction opposite to the rotational direction, and the molded continuous slide fastener element material is blown up from inside the cavity and onto the scraper. 1. A method for manufacturing a slide fastener element, the method comprising: taking it out, and then molding it into a slide fastener element shape. 2 A die wheel having a continuous cavity for molding the slide fastener element material on its circumferential surface is arranged on a machine base so as to actively rotate, a synthetic resin extrusion nozzle is disposed opposite to the circumferential surface of the die wheel, and The peripheral surface of the die wheel in the zone where the synthetic resin is cured is
A scraper is disposed opposite to the direction of rotation of the die wheel, and an air nozzle is provided at the tip of the scraper to blow out compressed air against the circumferential surface of the die wheel in a direction counter to the direction of rotation of the die wheel. A slide fastener element manufacturing apparatus characterized in that a molding device for molding the slide fastener element material into the shape of the slide fastener element is disposed in a transfer path of the slide fastener element material taken out onto the scraper.