Zipper tooth
By introducing a reinforced base and an inclined demolding section into the zipper tooth design, the problem of difficult demolding of plastic steel zipper teeth was solved, achieving efficient molding and high-yield zipper tooth production.
Patent Information
- Application Number
- CN202422762202.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-11-13
AI Technical Summary
Existing plastic steel zipper teeth tend to stick to the mold during demolding, resulting in a high defect rate and difficulty in efficient molding.
Design a chain tooth structure including a reinforcing base and a demolding part. The outer peripheral surface of the base is perpendicular to the fabric strip. The demolding part gradually tapers away from the base with an included angle of 4° < α < 6°. Increase the inclination of the outer peripheral surface of the demolding part to reduce the contact area with the mold.
It improves the ease of demolding of chain teeth and the adhesion to the fabric tape, reduces the defect rate, and improves the product yield.
Smart Images
Figure CN223730856U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to zip fastener technology, in particular to a chain tooth. BACKGROUND
[0002] Plastic zip fastener, also known as resin zip fastener, is a common type of zip fastener made of polyester or polyamide plastic materials. Its characteristics are that the chain tooth is made of solid plastic, which has durability and flexibility. Compared with metal and nylon zip fasteners, plastic tooth zip fasteners are lighter and lower in cost, and are widely used in clothing, luggage and outdoor products. The plastic material makes this zip fastener have good wear resistance and corrosion resistance, and the color and size are various, which is suitable for various design requirements. In addition, the plastic tooth zip fastener can still maintain good use performance under low temperature conditions and is not easy to deform or break, which is an important component indispensable in daily necessities. Plastic zip fasteners are usually produced by injection molding process, and the chain tooth is directly injection molded on the cloth tape. The outer side surface of the existing plastic chain tooth is mostly inclined relative to the cloth tape, but the above structure has the following disadvantages: the contact area between the inclined outer side surface and the chain tooth forming mold is large, and the adhesion between the chain tooth and the mold is large during demolding. If the material of the chain tooth is difficult to demold, the chain tooth is easy to adhere to the mold and cannot be smoothly formed on the cloth tape, resulting in high scrap rate. SUMMARY
[0003] Therefore, the utility model aims at providing a chain tooth with high yield.
[0004] In order to achieve the above purpose, the solution of the utility model is:
[0005] A chain tooth, comprising a tooth head part and a tooth tail part connected, the tooth head part is used for engaging with the tooth head part of another chain tooth, and the tooth tail part is fixed on a cloth tape, characterized in that: the tooth tail part has a reinforcing base and a demolding part, the reinforcing base is located above the cloth tape, the demolding part is located above the reinforcing base, the outer side surface of the reinforcing base is perpendicular to the cloth tape, and the demolding part is gradually tapered in the direction away from the reinforcing base.
[0006] Further, the tooth tail part has a tail end face opposite to the tooth head part and two side end faces facing the adjacent chain tooth, the two side end faces are oppositely arranged, and the tail end face is located between the two side end faces and connected with the two side end faces.
[0007] Further, a fillet transition structure is guided at the connection between the tail end face and the side end face.
[0008] Further, the outer periphery of the demolding part is inclined relative to the outer periphery of the reinforcing base.
[0009] Further, the included angle between the outer peripheral surface of the demolding part and the outer peripheral surface of the corresponding reinforcing base is α, where 4° < α < 6°.
[0010] Further, the height of the reinforcing base located on one side of the cloth tape is h1, and the height of the demolding part located on one side of the cloth tape is h2, where 1.5 < h2:h1 < 2.5.
[0011] Further, the chain teeth are PET chain teeth.
[0012] After adopting the above structure, a chain tooth proposed by the present utility model has the following technical effects: the vertically arranged outer peripheral surface of the reinforcing base plays a role in reducing the contact area between the outer edge of the chain tooth and the inner upper surface of the mold. At the same time, the reinforcing base increases the volume of the part of the chain tooth directly molded on the cloth tape, reducing the adhesion force of the mold to the chain tooth while increasing the adhesion force between the chain tooth and the cloth tape, making demolding easier and the product yield higher. Description of the Drawings
[0013] Fig. 1 It is a front view structural schematic diagram of a chain tooth of the present utility model;
[0014] Fig. 2 It is a side view structural schematic diagram of a chain tooth of the present utility model;
[0015] Fig. 3 It is a structural schematic diagram when a chain tooth of the present utility model is molded on a cloth tape.
[0016] In the figure: 1. Tooth head, 2. Tooth tail, 3. Cloth tape body, 4. Cloth rib, 5. Reinforcing base, 6. Demolding part, α. The included angle between the outer peripheral surface of the demolding part and the outer peripheral surface of the corresponding reinforcing base, h1. Height of the reinforcing base, h2. Thickness of the tooth tail. Detailed Embodiment
[0017] In order to further explain the technical solution of the present utility model, the present utility model will be elaborated in detail below through specific embodiments.
[0018] As Figs. 1-3 shown, a chain tooth includes a tooth head 1 and a tooth tail 2 connected to each other. The chain tooth is generally directly molded on a cloth tape. The cloth tape includes a cloth tape body 3 and cloth ribs 4 located at the edge of the cloth tape body. Multiple chain teeth are molded side by side on the cloth tape to form a zipper tape. Two zipper tapes are arranged opposite to each other, and the chain teeth on the two zipper tapes are engaged with each other. The zipper tape is the same as the zipper tape in the conventional technology, and the injection molding process of the chain tooth is a conventional injection molding process, which will not be elaborated here.
[0019] The chain tooth is formed of a plastic material. Specifically, in this embodiment, the material of the chain tooth is PET.
[0020] The tooth head 11 is used to engage with the tooth head 1 of the tooth on the other chain belt, and the tooth tail 2 is injection molded and fixed on the cloth belt. Specifically, the tooth tail 2 is injection molded on the cloth belt and cloth bar, and the central section of the tooth tail 2 coincides with the central section of the cloth belt and the cloth bar. The central section refers to the central section in the thickness direction.
[0021] The tooth tail 2 is a block, and the horizontal cross section of the tooth tail 2 is a polygon.
[0022] In the embodiment, the tooth tail 2 is a block with a square horizontal cross section.
[0023] Preferably, the square is a rectangle, and the tooth tail 2 has a tail end surface facing away from the tooth head 1 and two side end surfaces facing adjacent teeth. The two side end surfaces are oppositely arranged, and the tail end surface is located between the two side end surfaces and connected with the two side end surfaces. The connection between the tail end surface and the side end surface is guided by a rounded transition structure.
[0024] The tooth tail 2 has a reinforcing base 5 and a demolding part 6. The reinforcing base 5 is located on both sides of the cloth belt, and the demolding part 6 is located on the side of the reinforcing base 5 away from the reinforcing base 5. The outer circumferential surface of the reinforcing base 5 is perpendicular to the cloth belt. The area corresponding to the side end surface of the reinforcing base 5 is a vertical surface perpendicular to the cloth belt. The area corresponding to the tail end surface of the reinforcing base 5 is also a vertical surface perpendicular to the cloth belt. The area corresponding to the rounded transition structure of the reinforcing base 5 is a cylindrical surface.
[0025] In the embodiment, the reinforcing base 5 is substantially square. The areas corresponding to the two side end surfaces of the reinforcing base 5 are parallel to each other. The area corresponding to the tail end surface of the reinforcing base 5 is perpendicular to the area corresponding to the side end surface of the reinforcing base 5.
[0026] The demolding part 6 is tapered away from the reinforcing base 5, that is, the circumferential dimension of the demolding part 6 gradually decreases away from the reinforcing base 5. The demolding part 6 is away from the reinforcing base 5. The outer circumferential surface of the demolding part 6 is inclined relative to the outer circumferential surface of the reinforcing base 5 adjacent to it. Specifically, the outer circumferential surface of the demolding part 6 is inclined inward relative to the outer circumferential surface of the reinforcing base 5. In the embodiment, the angle between the outer circumferential surface of the demolding part 6 and the outer circumferential surface of the corresponding reinforcing base 5 is α, and 4° < α < 6°.
[0027] Further, the height of the reinforcing base 5 located on one side of the cloth belt is h1, the height of the reinforcing base 5 is h1, and the thickness of the tooth tail 2 is h2, and 2.5 < h2: h1 < 3.5.
[0028] The vertical outer circumferential surface of the reinforcing base 5 reduces the contact area between the outer circumferential edge of the chain tooth and the upper surface of the inner side of the mold, and the reinforcing base 5 increases the volume of the chain tooth part directly formed on the cloth belt, reduces the adhesion force of the mold on the chain tooth, and increases the adhesion force of the chain tooth and the cloth belt, so that the PET chain tooth is easier to demold, and the product yield is higher.
[0029] It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. In addition, the terms "first", "second", and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features.
[0030] The above embodiments and drawings do not limit the product form and style of the present application, and any appropriate changes or modifications made by those skilled in the art shall be considered as not departing from the patent scope of the present application.
Claims
1. A chain element comprising a head portion and a tail portion connected to each other, the head portion being configured to engage with a head portion of another chain element, the tail portion being configured to be fixed to a webbing, characterized in that: The tooth tail has a reinforcing base and a demolding part, the reinforcing base is located on both sides of the belt, the demolding part is located on the side of the reinforcing base away from the belt, the outer circumferential surface of the reinforcing base is perpendicular to the belt, the demolding part is tapered away from the reinforcing base, and the outer circumferential surface of the demolding part is inclined relative to the outer circumferential surface of the reinforcing base.
2. A fastener as defined in claim 1 wherein: The tooth tail has a tail end surface away from the tooth head and two side end surfaces facing adjacent chain teeth, the two side end surfaces are oppositely arranged, and the tail end surface is located between the two side end surfaces and connected with the two side end surfaces.
3. A fastener as defined in claim 2 wherein: A round corner transition structure is guided at the connection between the tail end surface and the side end surface.
4. A fastener as defined in claim 2 wherein: The outer circumferential surface of the demolding part and the outer circumferential surface of the corresponding reinforcing base form an angle α, and 4° < α < 6°.
5. A fastener as defined in claim 2 wherein: The height of the reinforcing base is h1, the thickness of the tooth tail is h2, and 2.5 < h2:h1 < 3.
5.
6. A fastener as defined in claim 1 wherein: The chain tooth is a PET chain tooth.