Hook-and-loop punching die and method suitable for hook-and-loop punching of loose fabric

Abstract

The overlock punching die comprises an upper die body and a bottom die body, the upper die body comprises an ejector pin and an elastic cover, the needle point angle of the ejector pin is 20-40 degrees, the elastic cover comprises a bottom plate and a cylindrical side wall, the bottom plate is located at the bottom end of the cylindrical side wall, the inner diameter of the cylindrical side wall is larger than the diameter of a needle body, and a through hole matched with the needle body is formed in the bottom plate; the cylindrical side wall is made of elastic materials, the ejector pin is located in the elastic cover, when a bottom plate of the elastic cover is pressed, the tip of the ejector pin penetrates out of a through hole of the bottom plate, and the bottom die is provided with a die hole matched with a pin body. The invention further discloses a method suitable for making and overlocking the loose fabric. The method comprises the steps that the fusible interlining is added to the position, where the overlocking button needs to be installed, of the back side of the fabric; forming overlocking holes in overlocking positioning points on the fabric by adopting an overlocking punching die; and buttons are arranged at the positions of the button holes. According to the invention, yarn breakage caused by punching on the loose fabric can be avoided, and the method is suitable for overlocking and fixing of fabrics with multiple material properties, such as weaving, tatting, loosening and irregularity and the like.

Description

Technical Field

[0001] The invention relates to a button punching die and a method for punching buttons on fabrics, belonging to the technical field of methods for assembling clothing button fasteners. Background Art

[0002] The installation of buttons on clothing fabrics mainly uses button punching dies to form holes on the fabrics, and then install the buttons. Conventional non-woven fabrics can be directly drilled and buttoned after marking the drilling positions before punching, which does not cause much damage to the fabric structure. However, loose fabrics such as woven and knitted small fragrances are different from conventional fabrics. Direct punching with conventional dies will break the silk threads. The broken yarn cannot be repaired, causing the garment to be deformed and damaged, thereby reducing the service life of the garment. Summary of the invention

[0003] In view of the above-mentioned defects of the prior art, the task of the present invention is to provide a button punching die. Another task of the present invention is to provide a method for punching buttons on loose fabrics to solve the problem that punching during button installation breaks the fabric thread and reduces the service life of the finished garment.

[0004] The technical solution of the present invention is as follows: a button punching mold, comprising an upper mold and a bottom mold, the upper mold comprising a ejector pin and an elastic cover, the needle tip angle of the ejector pin is 20° to 40°, the elastic cover comprises a bottom plate and a cylindrical side wall, the bottom plate is located at the bottom end of the cylindrical side wall, the inner diameter of the cylindrical side wall is larger than the diameter of the needle body, the bottom plate is provided with a through hole adapted to the needle body, the cylindrical side wall is made of an elastic material, the ejector pin is located in the elastic cover, when the bottom plate of the elastic cover is pressurized, the needle tip of the ejector pin passes through the through hole of the bottom plate, and the bottom mold is provided with a mold hole adapted to the needle body.

[0005] Furthermore, the height of the cylindrical side wall is 1 to 3 cm.

[0006] Furthermore, the cylindrical side wall is made of rubber.

[0007] Furthermore, the inner diameter of the cylindrical side wall is 2 to 4 times the diameter of the needle body.

[0008] Another technical solution of the present invention is as follows: A method for fastening buttons on loose fabrics, comprising the following steps: Step 1: Add adhesive lining on the back side of the fabric where the buckle needs to be installed; Step 2: Form button holes at the button positioning points on the fabric using the button punching die mentioned above; Step 3: Install the buckle at the buckle hole.

[0009] Furthermore, when forming the button hole in step 2, the bottom mold is placed on the back side of the fabric, the upper mold is pressed down to compress the elastic cover, and the ejector pin is inserted from the front side of the fabric corresponding to the position of the button positioning point.

[0010] Furthermore, in step 1, after adding the adhesive lining, buttonholes are made around the button positioning points.

[0011] Furthermore, the outer diameter of the chrysanthemum eye is not greater than the covering diameter of the buckle.

[0012] The advantages of the present invention compared with the prior art are: The button punching die of the present invention is used to process button holes on loose and unstable fabrics such as woven and shuttle weaving, which can avoid broken wires during the punching process, effectively solve the tensile deformation and drilling broken wire phenomena of most special performance fabrics by adding adhesive lining and chrysanthemum eyes, avoid the difficulties of process sewing, the risks of broken wires and deformation of ready-made clothes, improve the stability of the product, reduce the dependence on the technical skills of the operator, effectively extend the service life of the product, and ensure the product quality. The present invention is applicable to multi-material performance fabrics including woven, shuttle weaving, loose and irregular. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of a button punching die.

[0014] Figure 2 This is a schematic diagram of the position of the cutting pieces.

[0015] Figure 3 This is a diagram of a chrysanthemum eye keyhole.

[0016] Figure 4 It is a schematic diagram of the cross-section structure of the buckle and fabric assembly of the embodiment. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the embodiments, but are not intended to limit the present invention.

[0018] Please combine Figure 1 As shown, the structure of the button punching die provided by the embodiment of the present invention mainly includes two parts, an upper die 1 and a bottom die 2.

[0019] The upper mold 1 includes an ejector pin 101 and an elastic cover 102. The ejector pin 101 is made of metal. The diameter of the needle body of the ejector pin 101 is selected according to the buckle to be installed, which is generally 1.5 to 3 mm. With a needle body of this diameter, the aperture of the perforation formed on the fabric is 1 to 2 mm. The diameter of the needle body in this embodiment is 2 mm. The needle tip angle of the ejector pin 101 is 20° to 40°, and 30° is selected in this embodiment. The needle tip angle of the ejector pin 101 is much smaller than that of a conventional ejector pin. Conventional ejectors are blunt-angle needles, which use the cooperation of the needle head and the edge of the hole of the bottom mold to extrude and cut the fabric. The present invention mainly uses the needle tip to extrude the silk threads constituting the fabric to the surroundings to form a buckle hole, thereby avoiding the breakage of the fabric. A pressure plate 103 is provided at the top of the ejector pin 101, and the pressure plate 103 cooperates with the top of the elastic cover 102.

[0020] The elastic cover 102 of this embodiment includes a bottom plate 102a and a cylindrical side wall 102b, wherein the cylindrical side wall 102b is made of a flexible rubber material, the inner diameter of the cylindrical side wall 102b is 2 to 4 times the diameter of the needle body, and the height is 1 to 3 cm. In this embodiment, the inner diameter of the cylindrical side wall 102b is 5 mm and the height is 1.5 cm. The top of the cylindrical side wall 102b is an open end, and the bottom end of the cylindrical side wall 102b is connected to the bottom plate 102a, and a through hole 102a1 adapted to the needle body is provided in the central position of the bottom plate 102a. After the ejector pin 101 and the elastic cover 102 are assembled, the pressure plate 103 covers the top of the cylindrical side wall 102b, and the ejector pin 101 is located in the elastic cover 102.

[0021] The bottom mold 2 is a metal part, and a mold hole 2a adapted to the needle body is provided on the bottom mold 2, so that the ejector pin 101 can extend into the mold hole 2a when piercing downward.

[0022] When using the button punching die, the fabric to be punched is between the bottom plate 102a of the elastic cover 102 and the bottom die 2. Press the upper die 1 downward, and the fabric is clamped by the bottom plate 102a of the elastic cover 102 and the bottom die 2, ensuring that the ejector pin 101 is inserted into the correct position while avoiding excessive pulling and deformation of the fabric. The elastic cylindrical side wall 102b is compressed and deformed during further downward pressure, and the ejector pin 101 penetrates the fabric from the bottom plate 102a. The elasticity generated by the cylindrical side wall 102b forms a certain buffer for the downward pressure of the ejector pin 101, and the needle tip of the ejector pin 101 squeezes the yarn strands of the fabric to the surroundings instead of breaking the yarn to achieve the fabric hole opening effect.

[0023] Please combine Figures 2 to 4 As shown, the method of punching buttons on loose fabrics of small fragrance style clothing such as woven and woven styles using the button punching die of the embodiment includes the following steps: On the back side of the fabric piece 3, a 4 cm wide adhesive lining 4 is glued at the buckle position to fix the yarn, increase the strength and toughness of the fabric, and facilitate the hole opening operation to reduce the risk of yarn breakage. In the subsequent processing and sewing process, the adhesive lining 4 can also fix the fabric to prevent stretching and deformation due to force, and can maintain its design contour, so that the pattern and the finished garment can be more flat and three-dimensional, thereby extending the wearing life of the garment.

[0024] Dense chrysanthemum eyelets 5 are made around the button positioning point. When the hole is opened later, the needle tip of the thimble 101 is drilled into the inner circle of the chrysanthemum eyelet 5. The chrysanthemum eyelet 5 can tightly lock the yarn to prevent occasional small broken threads from emerging. The process of adding chrysanthemum eyelets 5 is suitable for button hole opening of any loose fabric such as woven fabrics, and will not cause any damage to the fabric thread such as broken thread and thread drawing. In order to ensure that the chrysanthemum eyelet 5 is not exposed and affects the appearance after the buttoning is completed, the outer diameter of the chrysanthemum eyelet 5 is not greater than the covering diameter of the button 6.

[0025] Place the fabric piece 3 after the buttonhole on the bottom mold 2, align the inner circle of the chrysanthemum eyelet 5 with the mold hole 2a of the bottom mold 2, press down the upper mold, so that the needle tip of the ejector pin 101 penetrates from the front of the fabric piece 3, and the ejector pin 101 squeezes the fabric yarn threads to form an opening.

[0026] Finally, the columnar portion of the buckle 6 is passed through the opening on the fabric cut piece 3, and the buckle is installed by cooperating with the columnar portion through the matching piece 7 of the buckle on the other side of the fabric cut piece 3.

Claims

1. A button punching die, comprising an upper die and a bottom die, characterized in that: The upper mold includes an ejector pin and an elastic cover. The needle tip angle of the ejector pin is 20° to 40°. The elastic cover includes a bottom plate and a cylindrical side wall. The bottom plate is located at the bottom end of the cylindrical side wall. The inner diameter of the cylindrical side wall is larger than the diameter of the needle body. A through hole matching the needle body is provided on the bottom plate. The cylindrical side wall is made of elastic material. The ejector pin is located in the elastic cover. When the bottom plate of the elastic cover is under pressure, the needle tip of the ejector pin passes through the through hole of the bottom plate. The bottom mold is provided with a mold hole matching the needle body.

2. The button punching die according to claim 1, characterized in that: The height of the cylindrical side wall is 1 to 3 cm.

3. The button punching die according to claim 1, characterized in that: The cylindrical side wall is made of rubber.

4. The button punching die according to claim 1, characterized in that: The inner diameter of the cylindrical side wall is 2 to 4 times the diameter of the needle body.

5. A method for fastening buttons on loose fabrics, characterized in that: The following steps are involved: Step 1: Add adhesive lining on the back side of the fabric where the buckle needs to be installed; Step 2: forming a button hole at a button positioning point on the fabric using the button punching die described in any one of claims 1 to 4; Step 3: Install the buckle at the buckle hole.

6. The method for fastening buttons on loose fabrics according to claim 5, characterized in that: When forming the button hole in step 2, the bottom mold is placed on the back side of the fabric, the upper mold is pressed down to compress the elastic cover, and the ejector pin is inserted from the front side of the fabric corresponding to the position of the button positioning point.

7. The method for fastening buttons on loose fabrics according to claim 5, characterized in that: In step 1, after adding the adhesive lining, daisy-eye buttonholes are made around the button positioning points.

8. The method for fastening buttons on loose fabrics according to claim 7, characterized in that: The outer diameter of the chrysanthemum eye is not greater than the covering diameter of the buckle.

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