U-shaped airtight zipper and processing technology therefor

Abstract

A U-shaped airtight zipper, comprising two cloth tape bodies (1), wherein zipper teeth (2) are arranged on the side of any one cloth tape body (1) facing the other cloth tape body (1), and the side of any one cloth tape body (1) facing the other cloth tape body (1) is provided with a sealing rubber strip (3); each cloth tape body (1) comprises a polyester cloth tape (101) and a polyurethane coating (102), the cloth tape body (1) consists of non-bent cloth tape sections (11) and a bent cloth tape section (12), and cut slots (13) are formed in the bent cloth tape section (12). Also disclosed is processing technology for a U-shaped airtight zipper. An area formed at the bent cloth tape section (12) can be used as a window for opening and closing, so that opening and closing are convenient; in a natural state, the airtight zipper is in a preset form, so that good airtight performance is ensured and installation is convenient. A required zipper can be processed according to the processing technology, the shaping of the zipper is reliable, the zipper is not reset in the natural state, the form is ensured, bending is smooth and installation is convenient.

Description

A U-shaped airtight zipper and its processing technology Technical Field

[0001] This invention relates to the field of zipper manufacturing technology, and more specifically, to a U-shaped airtight zipper and its processing technology. Background Technology

[0002] To ensure good airtightness, airtight zippers typically have an anti-permeability coating on the fabric tape. However, this coating makes it difficult for the fabric tape to bend in a plane coplanar with it. Even if bending is achieved, it will return to its original shape when the external force is removed, resulting in incomplete shaping, limited use, and unsatisfactory overall performance. Therefore, this invention proposes a U-shaped airtight zipper and its processing technology.

[0003] Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a U-shaped airtight zipper and its processing technology.

[0005] To solve the above-mentioned technical problems, the present invention achieves its objective as follows: The present invention relates to a U-shaped airtight zipper, comprising two fabric tape bodies arranged symmetrically on the left and right sides, wherein each fabric tape body has interlocking chain teeth arranged on the side facing the other fabric tape body, and each fabric tape body has a sealing strip abutting against each other on the side facing the other fabric tape body, wherein the fabric tape body comprises polyester fabric tape and polyurethane coating; the fabric tape body is composed of non-curved section fabric tape and curved section fabric tape, wherein the curved section fabric tape is cut with grooves arranged at intervals along its extension trajectory and allowing it to be freely bent in the horizontal plane.

[0006] The invention is further configured such that the groove extends radially along the curved section of the fabric strip.

[0007] The invention is further configured such that the groove is in the shape of a straight strip.

[0008] The present invention is further configured such that: the radius of the curved section of the fabric is R, the length of the groove is L, the width of the groove is W, and the distance between two adjacent grooves is X; L:W = 40:1; L:X = 2.5~3:1; R:L = 18~19:1.

[0009] The present invention is further configured such that the sealing strip is made of polyurethane material.

[0010] The present invention is further configured such that the sealing strip and the polyurethane coating are integral.

[0011] This invention also relates to a processing technology for a U-shaped airtight zipper, comprising the following steps:

[0012] S1. Take the finished strip of zipper tape;

[0013] S2. Use a laser cutting device to cut the corresponding grooves on the curved section of the fabric tape;

[0014] S3. The curved section of the zipper tape, after the groove cutting is completed, is placed into the U-shaped shaping mold and clamped in place.

[0015] S4. Place the U-shaped mold with the zipper strap in an oven, heat at 90-110℃ for 2-3 hours;

[0016] S5. Remove the U-shaped mold with the zipper strap from the oven and immerse it in water at 20°C for cooling. Cooling time: 15-30 minutes. After cooling, remove it and let it air dry naturally.

[0017] S6. Disassemble the U-shaped molding die and remove the zipper tape that has been shaped.

[0018] The present invention is further configured such that, in step S3, the chain teeth on the two fabric tape bodies are in a non-engaging state.

[0019] The present invention is further configured such that: the U-shaped shaping mold includes an upper mold and a lower mold, a positioning groove is provided between the lower mold and the upper mold for the chain teeth on the curved section of the fabric to be embedded, the curved section of the fabric is pressed between the upper mold and the lower mold, the two ends of the positioning groove are respectively connected to the outside, a part of the positioning groove is provided on the upper mold and the other part is provided on the lower mold.

[0020] In summary, the present invention has the following beneficial effects: the U-shaped airtight zipper involved in the present invention has an area formed at the curved section of the fabric strip that can be used as a window for opening and closing, making it convenient to open and close; the zipper is also in a preset shape in its natural state, ensuring good airtight performance while being easy to install.

[0021] The processing technology of the U-shaped airtight zipper involved in this invention can produce the zipper required in this application. The zipper is reliably shaped and does not return to its original position in its natural state, ensuring its shape while allowing for smooth bending and convenient installation. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a cross-sectional structural schematic diagram of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the lower mold used in this invention;

[0025] Figure 4 is a schematic diagram of the structure of the upper mold used in this invention. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that these descriptions are merely for further illustrating the features and advantages of the present invention, and not for limiting the scope of the patent claims of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0028] Example 1

[0029] Referring to Figures 1 to 4, the U-shaped airtight zipper involved in this embodiment includes two fabric tape bodies 1 arranged symmetrically from left to right. Each fabric tape body 1 has interlocking chain teeth 2 on the side facing the other fabric tape body, and each fabric tape body 1 has a sealing strip 3 that abuts against each other on the side facing the other fabric tape body. The fabric tape body 1 includes a polyester fabric tape 101 and a polyurethane coating 102. The fabric tape body 1 is composed of a non-curved section of fabric tape 11 and a curved section of fabric tape 12. The curved section of fabric tape 12 has grooves 13 cut at intervals along its extension trajectory, allowing it to bend freely in the horizontal plane.

[0030] Furthermore, the groove 13 extends radially along the curved section of the fabric strip 12.

[0031] Furthermore, the groove 13 is in the shape of a straight strip.

[0032] Furthermore, the radius of the curved section of the fabric 12 is R, the length of the groove 13 is L, the width of the groove 13 is W, and the distance between two adjacent grooves 13 is X; L:W = 40:1; L:X = 2.5~3:1; R:L = 18~19:1.

[0033] Furthermore, the sealing strip 3 is made of polyurethane material; the sealing strip 3 and the polyurethane coating 102 are integral.

[0034] This invention also relates to a processing technology for a U-shaped airtight zipper, comprising the following steps:

[0035] S1. Take the finished strip of zipper tape;

[0036] S2. Use a laser cutting device to cut the corresponding grooves on the curved section of the fabric tape;

[0037] S3. The curved section of the zipper tape, after the groove cutting is completed, is placed into the U-shaped shaping mold and clamped in place.

[0038] S4. Place the U-shaped mold with the zipper strap in an oven, heat at 90-110℃ for 2-3 hours;

[0039] S5. Remove the U-shaped mold with the zipper strap from the oven and immerse it in water at 20°C for cooling. Cooling time: 15-30 minutes. After cooling, remove it and let it air dry naturally.

[0040] S6. Disassemble the U-shaped molding die and remove the zipper tape that has been shaped.

[0041] Furthermore, the U-shaped shaping mold includes an upper mold 4 and a lower mold 5. A positioning groove 6 is provided between the lower mold 5 and the upper mold 4 for the chain teeth 2 on the curved section of the fabric 12 to be embedded. The curved section of the fabric 12 is pressed between the upper mold 4 and the lower mold 5. The two ends of the positioning groove 6 are respectively connected to the outside. A part of the positioning groove 6 is provided on the upper mold 4 and the other part is provided on the lower mold 5.

[0042] In this embodiment, by setting the groove 13 to extend radially along the curved section of the fabric strip 12 and to be in the shape of a straight strip, it is helpful to use a laser cutting device to complete the processing of the groove 13.

[0043] Specifically, by setting the radius of the curved section of the fabric strip 12 to R, the length of the groove 13 to L, the width of the groove 13 to W, and the distance between two adjacent grooves 13 to X, and making L:W = 40:1; L:X = 2.5~3:1; R:L = 18~19:1, the curved section of the fabric strip 12 cut according to this ratio can successfully complete the in-plane bending, which is beneficial to the subsequent heat setting process.

[0044] The mating sealing strips 3 are used to seal the fabric belt body 1 after the chain teeth 2 are engaged.

[0045] In this design, by setting both ends of the positioning groove 6 to be connected to the outside, the non-curved section of the fabric 11 that does not require shaping can extend from the end.

[0046] Example 2

[0047] Referring to Figures 1 to 4, the processing technology of a U-shaped airtight zipper involved in this embodiment is further configured, based on Embodiment 1, in step S3, the zipper teeth on the two fabric bodies are in a non-engaging state.

[0048] In this embodiment, by placing the non-engaged zipper strip inside the U-shaped forming mold, the two sealing strips 3 do not touch. During heating, the expansion allowance bulges outwards towards the other sealing strip 3, resulting in a tighter zipper closure and better sealing after the zipper is completed. If the engaged zipper strip is placed inside the U-shaped forming mold, the sealing performance will not meet the standards after completion.

[0049] The U-shaped airtight zipper and its processing technology involved in this invention have an area formed at the curved section of the fabric strip that can serve as a window for opening and closing, making it convenient to open and close. The zipper is also in a preset shape in its natural state, ensuring good airtight performance while also being easy to install. This processing technology can produce the zipper required by this application by following these steps, and the zipper is reliably shaped and does not reset in its natural state, ensuring its shape while allowing for smooth bending and convenient installation. The overall functionality is complete and highly practical.

[0050] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0051] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A U-shaped airtight zipper, comprising two fabric tape bodies arranged symmetrically on the left and right sides, wherein each fabric tape body has interlocking chain teeth on the side facing the other fabric tape body, and each fabric tape body has a sealing strip abutting against each other on the side facing the other fabric tape body, characterized in that, The fabric body includes a polyester fabric and a polyurethane coating; the fabric body is composed of a non-curved section of fabric and a curved section of fabric, the curved section of fabric having grooves cut at intervals along its extension trajectory and allowing it to bend freely in the horizontal plane.

2. The U-shaped airtight zipper according to claim 1, characterized in that, The groove extends radially along the curved section of the fabric strip.

3. The U-shaped airtight zipper according to claim 2, characterized in that, The groove is straight.

4. The U-shaped airtight zipper according to claim 3, characterized in that, The radius of the curved section of the fabric is R, the length of the groove is L, the width of the groove is W, and the distance between two adjacent grooves is X; L:W = 40:1; L:X = 2.5~3:1; R:L = 18~19:

1.

5. The U-shaped airtight zipper according to claim 4, characterized in that, The sealing strip is made of polyurethane.

6. The U-shaped airtight zipper according to claim 5, characterized in that, The sealing strip is integrated with the polyurethane coating.

7. A processing method for the U-shaped airtight zipper according to claim 6, characterized in that, Includes the following steps: S1. Take the finished strip of zipper tape; S2. Use a laser cutting device to cut the corresponding grooves on the curved section of the fabric tape; S3. The curved section of the zipper tape, after the groove cutting is completed, is placed into the U-shaped shaping mold and clamped in place. S4. Place the U-shaped mold with the zipper strap in an oven, heat at 90-110℃ for 2-3 hours; S5. Remove the U-shaped mold with the zipper strap from the oven and immerse it in water at 20°C for cooling. Cooling time: 15-30 minutes. After cooling, remove it and let it air dry naturally. S6. Disassemble the U-shaped molding die and remove the zipper tape that has been shaped.

8. The processing technology of the U-shaped airtight zipper according to claim 7, characterized in that, In step S3, the chain teeth on the two fabric belt bodies are in a non-engaged state.

9. The processing technology of the U-shaped airtight zipper according to claim 8, characterized in that, The U-shaped shaping mold includes an upper mold and a lower mold. A positioning groove is provided between the lower mold and the upper mold for the chain teeth on the curved section of the fabric to be embedded. The curved section of the fabric is pressed between the upper mold and the lower mold. The two ends of the positioning groove are respectively connected to the outside. A part of the positioning groove is opened on the upper mold and the other part is opened on the lower mold.

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