CN1301160C - Method for manufacturing zipper teeth - Google Patents

Abstract

The present invention relates to a method for manufacturing zipper teeth, wherein a flat wire is processed into a Y-shaped zipper tooth by a continuous stepping die, and the steps include: at the first station, the side of the flat wire of a processing unit is trimmed, and the outer line of the Y-shaped zipper tooth is symmetrically cut out, the front half of which is an inverted trapezoid and the back half is a square; the trimming between the processing unit and the next processing unit forms a neck, and the junction of the neck and the back half is a circular arc rear end face; at the second station, the back half of the processing unit is punched to form a hemispherical boss; at the third station, the front half of the processing unit is cut to form a pair of teeth of the Y-shaped tooth; at the fourth station, the tooth embryo of the Y-shaped zipper tooth is clamped into the zipper tape by a clamping hammer, and cut along the circular arc rear end face. The production cost of this method is greatly reduced; moreover, the produced Y-shaped tooth has high flat tensile strength and high resistance to single tooth displacement.

Description

Method for manufacturing a zipper element

technical field

The invention relates to a method for making a zipper, in particular to a method for making a zipper element.

Background technique

There are two types of zipper teeth: Y-shaped teeth and ordinary teeth. The existing Y-shaped teeth must use Y-shaped special-shaped wires in cross-section, which are sliced and punched into the zipper tape through the YG-type tooth implant machine; this kind of chain teeth has no knife marks, and the head can be processed into a semi-spherical shape. Make the chain bend soft and engage lightly; its joint with the cloth belt can be designed into a reasonable shape (for example, a positioning pin is arranged) to improve the flat tensile strength and single-tooth displacement force, but the shape of the Y-shaped special-shaped wire is complex, It requires high precision and is difficult to manufacture. In my country, it basically relies on imports, and the cost is extremely high. Moreover, the YG-type tooth implant machine has a complicated mechanism.

Ordinary teeth use flat wires with a rectangular cross-section, which are processed into one side of the zipper by metal implantation machines. The raw material cost of the existing ordinary tooth is much lower than that of the Y-shaped special-shaped wire. The structure of the metal dental implant machine is simple. However, due to the limitation of the processing technology, the processing of the two stations and the cutting direction are opposite. There are obvious knife marks on the surface, which cannot be eliminated in the follow-up process and cannot be overcome at present; the surface of the boss of the chain element head is not smooth enough; moreover, the joint with the tape is restricted by the shape of the head, so it cannot form a positioning pin .

The production method of metal chain teeth and the metal implant machines with different shapes are generally used in various countries. The working principle is basically the same, and the flat copper or aluminum alloy flat wire is processed into a single side of the zipper through the metal implant machine, as shown in the figure As shown in 1, through the upper mold machine and the lower mold machine of the continuous stepping mold, the flat wire 1 is punched→cut triangle→cut the head→the tooth germ is clamped into the zipper tape; the zipper cloth is along the vertical direction of the tooth germ move.

The existing Y-shaped tooth adopts profiles with complex cross-sections, which requires high precision of raw materials and high manufacturing costs; while the ordinary type tooth is low in cost, but the zipper made of it has poor flat tensile strength and single tooth displacement resistance. And there are obvious knife marks on the exposed surface of the chain teeth.

It has always been a major subject in this industry to produce a metal zipper with a Y-shaped tooth effect with a rectangular flat material in cross section, and technicians from various countries have studied it for about 20 years.

Contents of the invention

The object of the present invention is to provide a method for producing a metal zipper element with a rectangular flat material to produce a Y-shaped element effect, and to produce a Y-shaped element at a low cost.

The technical solution of the present invention provides a method for making a zipper element, in which the flat wire is processed into a Y-shaped zipper element through a continuous stepping die, and the steps include:

(1) At the first station, the side of the flat wire of a processing unit is trimmed, and the outer line shape of the Y-shaped zipper element is symmetrically cut out. The first half is inverted trapezoidal, and the second half is square; A neck is formed between the processing unit and the next processing unit, and the junction of the neck and the rear half is an arc-shaped rear end surface;

(2) At the second station, punch the rear half of the above-mentioned processing unit to form a hemispherical boss;

(3) At the third station, the front half of the above-mentioned processing unit is centered to form a pair of teeth of Y-shaped chain teeth;

(4) At the fourth station, use the pressing hammer to clamp the tooth germ of the Y-shaped zipper element into the zipper tape, and cut it along the arc-shaped rear end surface.

As an improvement of the method of the present invention, a pair of positioning pins are also formed on the inside of a pair of teeth of the Y-shaped chain element in the centering treatment of the step (3).

As another improvement of the method of the present invention, the step (2) is performed before the step (1).

As another improvement of the method of the present invention, the punching point is processed by an upper die and a lower punch, and there is a protrusion on the bottom of the upper die, and the protrusion is aligned with the rear end surface; so that the punched out head boss The shape is more natural and beautiful.

The advantages of the present invention are: the method of the present invention can use flat materials to produce metal zipper elements with a Y-shaped tooth effect, and use copper-zinc alloys and aluminum alloys with rectangular cross-sections as raw materials, greatly reducing the cost; moreover, the produced Y-shaped The teeth have high flat tensile strength and high single-tooth displacement force, which reduces the knife marks to a certain extent.

Description of drawings

Fig. 1 is a schematic diagram of a method for making zipper elements using flat wire rods in the prior art;

Fig. 2 is the schematic diagram of the manufacturing method of zipper element of the present invention;

Fig. 3 is a schematic diagram of another manufacturing method of the zipper element of the present invention;

Fig. 4 is a cross-sectional view of the punching station of the present invention.

Illustration

1. Flat wire 2. Hemispherical boss 3. Teeth

4. Locating pin 5. Compression hammer 6. Neck

7. Protrusion 8. Punch point upper die 9. Punch point lower punch ejector rod

10. Punch punch

Detailed ways

Below in conjunction with accompanying drawing, specify according to the technical scheme of the inventive method:

Example 1

As shown in Figure 2, a Y-shaped tooth is produced by using a copper material with a rectangular cross section. The manufacturing steps of the metal zipper element are as follows:

(1) At the first station, the side of the flat wire 1 of a processing unit is trimmed, and the outer line shape of the Y-shaped zipper element is symmetrically cut out. The first half is inverted trapezoidal, and the second half is square. ; A neck 6 is formed between the processing unit and the next processing unit, and the joint between the neck 6 and the rear half is an arc-shaped rear end surface;

(2) In the second station, the hemispherical convex platform 2 is formed on the punching point of the second half of the above-mentioned processing unit through the punching point upper die 8 and the punching point punch 10, and the punching point punch 10 is convex from the punching point Die ejector rod 9 control;

(3) At the third station, the front half of the processing unit is centered to form a pair of teeth 3 of the Y-shaped chain teeth, and a pair of positioning pins 4 are formed inside the pair of teeth;

(4) At the fourth station, clamp the tooth germ of the Y-shaped zipper element into the zipper tape through the pressing hammer 5, and cut off along the arc-shaped rear end surface.

Example 2

As shown in Figure 3 and Figure 4, the Y-shaped teeth are produced by adopting a rectangular copper-zinc alloy with a rectangular cross section. The manufacturing steps of the metal zipper elements are:

(1) At the first station, a hemispherical boss 2 is formed on the rear half of the flat wire 1 of a processing unit; the punching point is processed by an upper die 8 and a lower punch 10, and the upper There is a protrusion 7 on the bottom of the die 8, and the protrusion 7 is aligned with the rear end face of the processing unit; so that the shape of the stamped head boss is more natural and attractive.

(2) At the second station, the side of the above processing unit is trimmed, and the outer line shape of the Y-shaped zipper element is symmetrically cut out, the front half is inverted trapezoidal, and the second half is square; the processing unit A neck 6 is formed between the next processing unit, and the joint between the neck 6 and the rear half is a circular arc-shaped rear end surface;

(3) At the third station, the front half of the processing unit is centered to form a pair of teeth 3 of the Y-shaped chain teeth, and a pair of positioning pins 4 are formed inside the pair of teeth;

(4) At the fourth station, clamp the tooth germ of the Y-shaped zipper element into the zipper tape through the pressing hammer 5, and cut off along the arc-shaped rear end surface.

The method of the present invention can adopt the flat material to produce the metal zipper element with Y-shaped teeth effect, adopt the raw material with rectangular cross section, and the cost is greatly reduced; moreover, the produced Y-shaped teeth have high flat tensile strength and high single-tooth displacement force, and at the same time , the knife mark on the side is very light.

Claims (4)

1, a kind of preparation method of slide fastener coupling element is processed into Y type slide fastener coupling element by continuous stepping mould with flat wire rod (1), and its step comprises:

At first station, the side of the flat wire rod of a machining cell to be done to cut edge handle, symmetry cuts out the outside line style of Y type slide fastener coupling element, and its first half is trapezoidal, latter half of being square; Cut edge between this machining cell and the next machining cell and form a neck (6), described neck and latter half of junction are the rear end face of circular arc;

At second station, to the latter half of some formation hemisphere face boss (2) that dashes of above-mentioned machining cell;

At the 3rd station,, form the tooth portion (3) of a pair of Y type chain tooth to the processing of hitting of the first half of above-mentioned machining cell; With

At the 4th station, clamp into zipper cloth belt by the tooth bud of shingling hammer (5), and cut off along the rear end face of circular arc with Y type slide fastener coupling element.

According to the preparation method of the described slide fastener coupling element of claim 1, it is characterized in that 2, the described processing of hitting also forms a pair of pilot pin (4) in a pair of tooth portion (3) inboard of Y type chain tooth.

According to the preparation method of claim 1 or 2 described slide fastener coupling elements, it is characterized in that 3, dashing o'clock before the side cut of first station is handled of described second station carried out.

According to the preparation method of claim 1 or 2 described slide fastener coupling elements, it is characterized in that 4, the described point that dashes adopts upper cavity die (8) and lower punch (10) processing, there is a projection (7) on the base of described upper cavity die (8), and this projection (7) is aimed at rear end face.

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