CN1748895A - Method for manufacturing a zipper element - Google Patents

Abstract

The invention relates to a method for manufacturing zipper teeth, which processes flat wire rods into Y-shaped zipper teeth through a continuous stepping die and comprises the following steps: at a first station, the side edge of the flat wire of one processing unit is subjected to edge cutting and covering treatment, the outer line type of the Y-shaped zipper teeth is symmetrically cut, the front end surface and the rear end surface of the Y-shaped zipper teeth are subjected to edge cutting and covering at one time, the front half part is in an inverted trapezoid shape, and the rear half part is in a square shape; a neck is formed between the processing unit and the next processing unit, and the front end surface and the rear end surface are arc-shaped; punching a point on the rear half part of the processing unit to form a hemispherical boss at a second station; at a third station, the front half part of the processing unit is processed by cutting to form a pair of tooth parts of the Y-shaped zipper teeth; and at the fourth station, tooth embryos of the Y-shaped zipper teeth are clamped into the zipper cloth belt through a pressing hammer, and are cut off along the circular arc-shaped rear end face. The method has low cost, and the produced Y-shaped tooth has high horizontal tensile strength and single tooth displacement resistance, and no cutter mark is connected to the surface of the tooth waist.

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, arrange a positioning pin) 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 head of the chain element is in the shape of a boss, and the surface is not smooth enough; moreover, its joint with the cloth belt is restricted by the shape of the head, so it cannot be formed 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.

Existing Y-shaped teeth adopt profiles with complex cross-sections, which require high precision of raw materials and high manufacturing costs; while ordinary-shaped teeth are low in cost, but the zipper made of them is poor in flat tensile strength and single-tooth displacement force, and There are 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, cut and wrap the side of the flat wire of a processing unit, symmetrically cut out the outer line shape of the Y-shaped zipper element, and cut and wrap the front and rear ends at one time. , the front half is an inverted trapezoid, and the second half is square; a neck is formed between this processing unit and the next processing unit, and the front end surface and the rear end surface are arc-shaped; in this way, the surface of the tooth waist part is cut and OK, no knife marks.

(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, the step (2) is performed before the step (1).

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

As another improvement of the method of the present invention, the punching point is processed by an upper die and a lower punch. 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 head is convex. The table 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 resistance. The head forms a hemispherical boss, and the surface of the tooth waist has no knife marks.

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 and Figure 4, 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, cut and wrap the side of the flat wire 1 of a processing unit, symmetrically cut out the outer line shape of the Y-shaped zipper element, and cut and wrap the front and rear ends at one time Forming, the front half is an inverted trapezoid, and the rear half is square; a neck 6 is formed between this processing unit and the next processing unit, and the front end surface and the rear end surface are arc-shaped; like this, the surface of the tooth waist part has no Pick up the knife marks.

(2) In the second station, the hemispherical convex platform 3 is formed on the second half of the above-mentioned processing unit by punching the upper die 8 and the punching punch 10, and the punching punch 10 is convex from the punching point The mold ejector rod 9 is controlled; the bottom edge of the upper die 8 has a protrusion 7, and the protrusion 7 is aligned with the rear end surface of the processing unit;

(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 element, and a pair of positioning pins 4 are formed inside the pair of teeth 3;

(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 face.

Example 2

As shown in Figure 3, the Y-shaped tooth is produced by using a rectangular copper-zinc alloy with a rectangular cross section. The manufacturing steps of the metal zipper element are:

(1) At the first station, the hemispherical boss 3 is formed by punching the rear half of the flat wire rod of a processing unit. The punching point is processed by an upper die 8 and a lower punch 10, and the upper die is There is a protrusion 7 on the bottom edge of 8, and the protrusion 7 is aligned with the rear end face;

(2) At the second station, the side of the above-mentioned processing unit is cut and wrapped, and the outer line shape of the Y-shaped zipper element is symmetrically cut out. The front and rear ends are cut and wrapped at one time. The upper part is an inverted trapezoid, and the second half is square; a neck 6 is formed between this processing unit and the next processing unit, and the front end surface and the rear end surface are arc-shaped;

(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 element, and a pair of positioning pins 4 are formed inside the pair of teeth 3;

(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 use flat materials to produce metal zipper elements with a Y-shaped tooth effect, and the raw material with a rectangular cross-section can greatly reduce the cost; moreover, the produced Y-shaped teeth have high flat tensile strength and high single-tooth displacement resistance. , the surface of the waist part has no knife marks, and the appearance is good.

Claims (4)

1. A method for making a zipper element, wherein the flat wire is processed into a Y-shaped zipper element through a continuous stepping die, and the steps include: In the first station, the side edge of the flat wire (1) of a processing unit is cut and hemmed, and the outer line shape of the Y-shaped zipper element is symmetrically cut out, and the front and rear ends are cut and hemmed at one time. , the front half is an inverted trapezoid, and the second half is square; a neck (6) is formed between the processing unit and the next processing unit, and the front end surface and the rear end surface are arc-shaped; At the second station, a hemispherical boss (3) is formed by punching the rear half of the above-mentioned processing unit; In the third station, the front half of the above-mentioned processing unit is centered to form a pair of teeth (4) of the Y-shaped chain element; and In 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 face. 2. The manufacturing method of the zipper element according to claim 1, wherein the punching at the second station is performed before the edge cutting at the first station. 3. According to the manufacturing method of the zipper element according to claim 1 or 2, it is characterized in that, in the center-cutting process of the step (3), a pair of positioning elements is formed on the inner side of the pair of teeth (3) of the Y-shaped element. needle (4). 4. According to the manufacturing method of the zipper element according to claim 1 or 2, it is characterized in that the punching point is processed by an upper die (8) and a lower punch (10), and the upper die (8) There is a protrusion (7) on the bottom edge, and the protrusion (7) is aligned with the rear end face.

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