Plastic forming process of zipper head in zipper head with anti-pulling and anti-collision structure

Abstract

The invention relates to the field of zipper pullers, in particular to a plastic forming process of a zipper puller in a zipper puller with an anti-pulling and anti-collision structure, the zipper puller comprises a cloth belt, zipper teeth and the zipper puller which are matched with one another, the zipper teeth are fixedly arranged on the cloth belt, and a pull buckle is arranged on the zipper puller. The cloth belt comprises a first cloth belt and a second cloth belt which are symmetrically arranged, and the zipper head is meshed with the first cloth belt and the second cloth belt and used for controlling opening and closing of the first cloth belt and the second cloth belt; the technical problems that in the pulling process of an existing zipper head, zipper tooth lining cloth or peripheral fabric is prone to being wound into zipper tooth gaps, so that the fabric is damaged, and a zipper stops working are solved.

Description

[0001] This application is a divisional application. The original application number is CN202411170631.8. The application date is August 26, 2024. The name of the invention is a zipper chain head with an anti-tear and anti-collision structure and its plastic molding process. Technical Field

[0002] The invention relates to the field of zipper sliders, and in particular to a plastic molding process for a zipper slider in a zipper slider with an anti-tearing and anti-collision structure. Background Art

[0003] Zippers rely on continuously arranged chain teeth to connect or separate items. They are now widely used in clothing, bags, tents, etc.

[0004] The zipper is composed of chain teeth, a puller, upper and lower stops (front stop and rear stop) or locking parts. The chain teeth are the key part, which directly determines the side pull strength of the zipper. Generally, a zipper has two chain belts, each with a row of chain teeth, and the two rows of chain teeth are staggered. The puller clamps the chain teeth on both sides, and the chain teeth on both sides can be engaged or disengaged with the help of the pull loop.

[0005] The above is the composition of the existing zipper structure, but the existing zipper has the following disadvantages during use: in order to facilitate the use of users, a convex head needs to be provided on the zipper chain head, which is used to connect with the pull head to facilitate the user to pull the chain head, and the convex horizontal height of the convex head is greater than the chain head itself, that is, if it is set on the inside, it will cause discomfort to the user during use, and if it is set on the outside, it is easy to hook other things and cause trouble; the second problem is that due to the existing zipper structure, the fabrics at both ends of the chain teeth are often entangled into the chain teeth during use. This situation is common and consumers have a deep understanding of it, and when the fabric layer is entangled into the chain teeth, it will cause two adverse effects. First, due to the user's inattention, the fabric will be strongly pulled at the moment it is entangled in the gap between the chain teeth, causing the fabric to deform or break. Second, when the fabric is entangled in the gap between the chain teeth, it will fill the gap between the chain teeth, causing the zipper to stop working directly and it is difficult to untangle. Whether it is pulled forward or backward, the entanglement will become more serious, which is very troublesome for users.

[0006] The utility model patent with Chinese patent application number 202023289339.8 discloses an anti-winding structure for a zipper head, including an upper pressing plate, a lower pressing plate arranged relative to the upper pressing plate, a first baffle arranged on one side of the upper pressing plate, a second baffle arranged on the other side of the upper pressing plate, a connecting column arranged between the first baffle and the second baffle, a fixed column arranged at the upper end of the upper pressing plate, a mounting hole arranged on the fixed column, an adjusting head arranged in the mounting hole, a limit assembly arranged at the connection between the adjusting head and the mounting hole, and a handle groove arranged on the adjusting head away from the end connected to the fixed column. The utility model discloses an anti-winding structure for a zipper head to shield both sides of an upper pressing plate through a first baffle and a second baffle, thereby effectively preventing external fabric from being wound between the upper pressing plate and the lower pressing plate. In addition, it is convenient to limit the movable range of the adjusting head through a limiting component, thereby preventing the adjusting head and the fixing column from being offset, which makes it inconvenient for the user to operate the adjusting head. The technical solution proposed in the above utility model mainly prevents external fabric from being wound between the upper pressing plate and the lower tooth plate of the zipper. As is known to all, the winding phenomenon that occurs when the zipper is pulled is generally the lining cloth of the zipper teeth closest to the zipper or its surrounding fabric, and the technical solution proposed in the above invention cannot overcome this problem. Summary of the invention

[0007] Therefore, in order to solve the above problems, the present invention proposes a plastic molding process for a zipper head with an anti-tear and anti-collision structure, which solves the technical problem that the existing zipper head is prone to entangle the chain tooth lining or the surrounding fabric into the chain tooth gap during the pulling process, causing the fabric to be damaged and the zipper to stop working.

[0008] To achieve the above-mentioned object, the present invention adopts the following technical scheme: a zipper head with an anti-pull and anti-collision structure, comprising a cloth tape, a chain tooth, and a zipper head that cooperate with each other, the chain tooth is fixedly arranged on the cloth tape, the zipper head is provided with a buckle, the cloth tape comprises a first cloth tape and a second cloth tape that are symmetrically arranged, the zipper head is respectively engaged with the first cloth tape and the second cloth tape, and is used to control the opening and closing of the first cloth tape and the second cloth tape; The zipper head comprises a central support plate, a first locking portion, a second locking portion, and a central locking portion, the central support plate is divided into a top mounting surface and a bottom mounting surface, the buckle is arranged on the top mounting surface of the central support plate and is fixed by a buckle plate, a limiting device is arranged between the buckle and the central support plate, the first locking portion, the second locking portion and the central locking portion are arranged on the bottom mounting surface of the central support plate, the central locking portion is arranged at the central axis position of the central support plate, the first locking portion and the second locking portion are symmetrically distributed at the left and right ends of the central locking portion, and the first locking portion, the second locking portion and the central locking portion are all integrally formed with the central support plate; A first meshing channel is provided between the first locking portion and the central locking portion, and a second meshing channel is provided between the second locking portion and the central locking portion. The structures of the first locking portion and the second locking portion are symmetrical to each other. The first locking portion includes a first supporting portion and a first buckling portion that are fixedly connected, and the second locking portion includes a second supporting portion and a second buckling portion that are fixedly connected. The first supporting portion is perpendicular to the central support plate, and the first buckling portion is parallel to the central support plate. The first supporting portion, the first buckling portion and the central locking portion together constitute the first meshing channel; the corresponding structure on the second locking portion and the central locking portion together constitute the second meshing channel. The central locking portion includes a central supporting portion and a central buckling portion, and the central buckling portion is inclined to the central support plate. When the zipper head and the cloth tape are matched and connected, the first cloth tape passes through the first meshing channel, and the second cloth tape passes through the second meshing channel.

[0009] Furthermore, the structures of the first cloth tape and the second cloth tape are symmetrical to each other, the first cloth tape includes a first matching portion, a first connecting portion and a first extending portion, the second cloth tape includes a second matching portion, a second connecting portion and a second extending portion, the first connecting portion connects the first matching portion and the first extending portion, the first extending portion and the first matching portion are parallel to each other, the first connecting portion is respectively perpendicular to the first matching portion and the first extending portion, and the first extending portion is used for sewing with the fabric.

[0010] Furthermore, a first elastic gasket is provided on the first matching portion of the first cloth tape, and a second elastic gasket is provided on the second cloth tape at a corresponding position.

[0011] Furthermore, the horizontal height of the central buckling portion is lower than that of the first buckling portion, and the end of the central buckling portion close to the first buckling portion is higher, and the end away from the first buckling portion is lower.

[0012] Furthermore, an auxiliary clamping block is fixedly provided on the bottom mounting surface of the central support plate, and the first cloth tape and the second cloth tape are respectively fixed in the first meshing channel and the second meshing channel by the cooperation of the auxiliary clamping block with the first locking portion and the second locking portion respectively; when the zipper head is pulled to close the first cloth tape and the second cloth tape, the chain teeth are wrapped by the first extension portion and the second extension portion.

[0013] A plastic molding process for a zipper chain head with an anti-tearing and anti-collision structure comprises the following steps: S1, mixing raw materials; picking up raw materials for mixing, the raw materials include polycarbonate particles and ABS resin particles, the two are mixed in a ratio of 1:1, the particles are mixed in a molten state by a heating device and further stirred to obtain a mixed raw material; S2, heating the injection molding barrel of the injection molding device to 225 degrees Celsius-325 degrees Celsius, and at the same time heating the hot runner in the injection molding device to 50 degrees Celsius-70 degrees Celsius, and heating the injection mold to 70 degrees Celsius-90 degrees Celsius, and then adding the mixed raw materials to the injection molding barrel and heating to form a molten melt, and guiding the molten melt into the injection mold through the hot runner for injection molding; S3, the injection mold is subjected to pressure holding treatment, and the pressure holding time is 1.5 seconds to 3.0 seconds; S4, shaping and cooling; the central locking part of the zipper head is further shaped by the shaping device built into the injection mold, and the injection mold is switched to the cooling mode at the same time. The temperature is quickly reduced to 40 degrees Celsius-60 degrees Celsius, and then demolding is performed, and then it is placed on a cooling rack to cool to room temperature to obtain a zipper head.

[0014] Furthermore, in step S1, the heating device continues to maintain a constant temperature of 200 degrees Celsius after completing the mixing of the raw materials.

[0015] Furthermore, the injection mold includes an upper mold and a lower mold that cooperate with each other, the lower mold includes a first mold, a second mold, a third mold and a fourth mold that are separated from each other, and the zipper head is molded at one time by four separate molds, and a accommodating cavity is arranged in the upper mold, and the shaping device is arranged in the accommodating cavity. The shaping device includes a central slide, a central base, an active driving wheel, a driven driving wheel, a driving chain, a first connecting rod, a second connecting rod, and a shaping plate. The central base is penetrated in the central slide, and a first tooth is arranged on the outer edge of the central base. The number of the driven driving wheels is two, which are respectively arranged at the upper and lower ends of the central base. The moving chain is sleeved on the two driven driving wheels, the shaping plate is connected to the driving chain through a first connecting rod and a second connecting rod, the two ends of the first connecting rod are rotatably connected to the driving chain and the shaping plate respectively, the two ends of the second connecting rod are rotatably connected to the driving chain and the shaping plate respectively, the active driving wheel comprises a first driving wheel and a second driving wheel which are arranged concentrically, the outer circumferential side surface of the first driving wheel is provided with a second tooth, the outer circumferential side surface of the second driving wheel is provided with a third tooth, the first tooth and the second tooth are meshed with each other, the third tooth and the driving chain are meshed with each other, and the density of the third tooth is greater than the density of the second tooth.

[0016] Furthermore, a vibration motor is integrated in the shaping plate.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are: 1. The zipper head proposed in the present invention has the functions of anti-tearing and anti-collision compared with the existing ordinary zipper head, which ensures that the fabric around the cloth tape will not be clamped in the gap between the zipper head and the chain teeth when the user opens and closes the zipper during use, thereby causing the fabric to be pulled and damaged and the zipper head to be deformed due to pulling. At the same time, by improving the structure of the zipper head, it also has an anti-collision property. The anti-collision property is reflected in that the zipper head is greatly reduced after being hit by an external force. In the existing structure, the zipper head is small in size and hard in texture, and it is unbearable to act on the skin or bones of the human body after being hit. The specific improvement of the present invention is that the first locking part, the second locking part and the central locking part arranged on the central support plate are different from the conventional chain head structure. The first locking part and the second locking part in the zipper head of the present invention will be completely wrapped by the cloth tape during use. The first and second locking parts are not covered, that is, they are not exposed to the outside at all, and the first locking part and the second locking part are not visible on the surface at all. It is well known that in the process of pulling the zipper head back and forth, the surrounding fabric enters the zipper head from the first meshing channel and the second meshing channel on the first and second locking parts. Therefore, the present invention completely prevents this situation from happening, and the wrapped first and second locking parts are the sides close to the human skin. When the zipper head is pulled together, the first cloth tape and the second cloth tape wrap the first and second locking parts on the one hand, and on the other hand, the two are connected by the chain teeth arranged on the first and second cloth tapes, and after being squeezed, the first cloth tape and the second cloth tape will also cover the chain tooth part, that is, when the zipper is fully pulled up, the side close to the human body is completely flexibly covered, and even if the zipper head is hit, it will not cause damage to the human skin.

[0018] 2. In the present invention, the first elastic gasket and the second elastic gasket are correspondingly arranged on the first cloth tape and the second cloth tape. The function of the first elastic gasket and the second elastic gasket is to provide auxiliary support for the first cloth tape and the second cloth tape. Since the first cloth tape and the second cloth tape are both flexible fabrics, the first cloth tape and the second cloth tape may be dislocated from the zipper head due to external pulling during use. By arranging the first elastic gasket and the second elastic gasket, both of which are hard and elastic plastic or rubber materials, the first cloth tape and the second cloth tape can be more closely matched with the zipper head. At the same time, due to their own elastic characteristics, they will not affect the original deformability of the zipper, but only improve the internal matching degree.

[0019] 3. The center locking part in the present invention is mainly used for the center support of the zipper chain head, and is responsible for the zipper opening operation. The center buckling part on the center locking part is inclined to the center support plate, and its inclination direction is high at one end close to the first buckling part and low at one end away from the first buckling part, that is, one end in the direction of opening the zipper is high, and one end in the direction of closing the zipper is low, which ensures that its posture is inclined upward when opening the chain teeth, ensuring the opening efficiency of the chain teeth, and it is inclined downward when closing the chain teeth. Close to the end of the zipper, when the zipper is fully closed, the downward tilt makes it easier to hide in the tape and fabric.

[0020] 4. In the present invention, an auxiliary clamping block is provided, which is used in conjunction with the first elastic gasket and the second elastic gasket corresponding to the first cloth tape and the second cloth tape, so as to further enhance the coordination stability between the zipper head and the cloth tape, and prevent the cloth tape from being separated from the zipper head after being pulled by external force.

[0021] 5. In the plastic molding process of the zipper chain head proposed in the present invention, an improvement and innovation is made in step S1, that is, the mixture after mixing the two raw materials is stored at a constant temperature of 200 degrees Celsius, which ensures that the mixture entering the S2 process can have a uniform texture and all consistency and fluidity will not affect the feeding efficiency.

[0022] 6. At the same time, the equipment used in the plastic molding process of the present invention is a special equipment for the zipper head of the present invention, especially the shaping device in the upper mold, which can directly perform molding operations on the central buckle part of the zipper head. The plastic molding process proposed by the present invention is different from the conventional one-time direct molding operation. The disadvantage of the one-time plastic molding process is that the raw material entering the molding cavity of the mold is a fixed amount, that is, the quality of the finished zipper head after molding cannot be controlled, and the quality of the zipper head cannot be made more solid by changing the amount of raw materials. The molding operation of the central buckle part in the present invention is a secondary Molding, that is, when a certain amount of raw materials enters the mold cavity, molding is performed separately for the inclined state of the center buckle part. The center buckle part after molding satisfies the requirement of being inclined to the horizontal plane on the one hand, and on the other hand, it satisfies the requirement of being slightly lower than the plane formed by the first locking part and the second locking part. In the process of the shaping plate moving downward to form, the raw materials are also properly squeezed, which improves the density of the finished zipper chain head in the later stage, thereby improving the quality. At the same time, during the working process, the shaping plate is improved and innovated on the mechanical structure of the shaping device, so that its downward movement and deflection can be carried out synchronously, and the action can be completed only by the rotation of the active driving wheel, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of the zipper head of the present invention (matching the cloth tape); Figure 2 This is a schematic diagram of the front structure of the zipper slider of the present invention (matching with the cloth tape); Figure 3 This is a schematic diagram of the back structure of the zipper slider of the present invention (matching with the cloth tape); Figure 4 It is a schematic diagram of the three-dimensional structure of the zipper head of the present invention; Figure 5 This is a schematic diagram of the back structure of the zipper slider of the present invention; Figure 6 This is a schematic diagram of the structure of the zipper head of the present invention when viewed from above; Figure 7 It is a schematic diagram of the side structure of the zipper head of the present invention; Figure 8 This is an exploded view of the injection mold in the present invention; Fig. 9 Schematic diagram of the internal structure of the upper mold in the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the shaping device in the present invention. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0025] See also Figure 1-Figure 10 The present invention provides a zipper head with an anti-pull and anti-collision structure, comprising a cloth tape 1, a chain tooth 2, and a zipper head 3 that cooperate with each other, wherein the chain tooth 2 is fixedly arranged on the cloth tape 1, and a buckle 4 is arranged on the zipper head 3, and the cloth tape 1 comprises a first cloth tape 11 and a second cloth tape 12 that are symmetrically arranged, and the zipper head 3 is respectively engaged with the first cloth tape 11 and the second cloth tape 12 to control the opening and closing of the first cloth tape 11 and the second cloth tape 12; The zipper head 3 includes a central support plate 31, a first locking portion 32, a second locking portion 33, and a central locking portion 34. The central support plate 31 is divided into a top mounting surface 31a and a bottom mounting surface 31b. The buckle 4 is arranged on the top mounting surface 31a of the central support plate 31 and is fixed by a buckle plate 41. A limiting device is arranged between the buckle 4 and the central support plate 31, wherein the limiting device is not described in the present invention. The reason is that the limiting device is a well-known component in the field of zipper chain heads, and mainly works through elastic parts and latches. The buckle 4 is vertical to the central support plate 31 or horizontally. The first locking part 32, the second locking part 33 and the central locking part 34 are arranged on the bottom mounting surface 31b of the central supporting plate 31, and the central locking part 34 is arranged at the central axis position of the central supporting plate 31. The first locking part 32 and the second locking part 33 are symmetrically distributed at the left and right ends of the central locking part 34. The first locking part 32, the second locking part 33 and the central locking part 34 are all integrally formed with the central supporting plate 31. A first meshing channel 35 is provided between the first locking portion 32 and the central locking portion 34, and a second meshing channel 36 is provided between the second locking portion 33 and the central locking portion 34. When the zipper head 3 and the cloth tape 1 are connected in cooperation, the first cloth tape 11 passes through the first meshing channel 35, and the second cloth tape 12 passes through the second meshing channel 16.

[0026] The structures of the first fabric tape 11 and the second fabric tape 12 are symmetrical to each other. The first fabric tape 11 includes a first matching portion 111, a first connecting portion 112 and a first extending portion 113. The second fabric tape 12 includes a second matching portion 121, a second connecting portion 122 and a second extending portion 123. The first connecting portion 112 connects the first matching portion 111 and the first extending portion 113. The first extending portion 113 and the first matching portion 111 are parallel to each other. The first connecting portion 112 is perpendicular to the first matching portion 111 and the first extending portion 113 respectively. The first extending portion 113 is used for sewing with fabric. A first elastic gasket 61 is arranged on the first matching portion 111 of the first fabric tape 11, and a second elastic gasket 62 is arranged on the corresponding position of the second fabric tape 12. The first elastic gasket 61 and the second elastic gasket 62 together constitute an elastic supporting portion 6.

[0027] The first locking portion 32 and the second locking portion 33 are symmetrical in structure. The first locking portion 32 includes a first supporting portion 322 and a first buckling portion 321 that are fixedly connected. The second locking portion 33 includes a second supporting portion and a second buckling portion that are fixedly connected. The first supporting portion 322 is perpendicular to the central supporting plate 31, and the first buckling portion 321 is parallel to the central supporting plate 31. The first supporting portion 322, the first buckling portion 321 and the central locking portion 34 together form the first meshing member. The corresponding structure on the second locking portion 33 and the central locking portion 34 together constitute the second meshing channel 36, and the central locking portion 34 includes a central supporting portion 341 and a central buckling portion 342, and the central buckling portion 342 is inclined to the central supporting plate 31, and the horizontal height of the central buckling portion 342 is lower than that of the first buckling portion 321, and the difference between the two is 0.5mm. The end of the central buckling portion 342 close to the first buckling portion 321 is high, and the end away from the first buckling portion 321 is low.

[0028] An auxiliary clamping block 5 is fixedly provided on the bottom mounting surface 31b of the central support plate 31, and the first cloth tape 11 and the second cloth tape 12 are respectively fixed in the first meshing channel 35 and the second meshing channel 36 by the cooperation of the auxiliary clamping block 5 with the first locking portion 32 and the second locking portion 33; when the zipper head 3 is pulled to close the first cloth tape 11 and the second cloth tape 12, the chain tooth 2 is wrapped by the first extension portion 113 and the second extension portion 123.

[0029] This embodiment simultaneously proposes a plastic molding process of the zipper head 3, specifically a plastic molding process of a zipper head with an anti-pull and anti-collision structure, comprising the following steps: S1, mixing raw materials; picking up raw materials for mixing, the raw materials include polycarbonate particles and ABS resin particles, the two are mixed in a ratio of 1:1, the particles are mixed in a molten state by a heating device and further stirred to obtain a mixed raw material; S2, heating the injection molding barrel of the injection molding device to 225 degrees Celsius, heating the hot runner in the injection molding device to 50 degrees Celsius, heating the injection mold to 70 degrees Celsius, adding the mixed raw materials to the injection molding barrel and heating to form a molten melt, and guiding the molten melt into the injection mold through the hot runner for injection molding; S3, the injection mold is subjected to pressure holding treatment, and the pressure holding time is 1.5 seconds; S4, shaping and cooling; the central locking part of the zipper head is further shaped by the shaping device built into the injection mold, and the injection mold is switched to the cooling mode at the same time. The temperature is quickly reduced to 40 degrees Celsius and then demolded, and then placed on a cooling rack to cool to room temperature to obtain a zipper head.

[0030] In step S1, the heating device continues to maintain a constant temperature of 200 degrees Celsius after the raw material mixing is completed.

[0031] The equipment used in the above-mentioned plastic molding process, the injection mold includes an upper mold 8 and a lower mold 7 that cooperate with each other, the lower mold 7 includes a first mold 71, a second mold 72, a third mold 73 and a fourth mold 74 that are separated from each other, and the zipper head 3 is molded once by four separate molds, and a receiving cavity is provided in the upper mold, and the shaping device 9 is arranged in the receiving cavity, and the shaping device 9 includes a central slide 91, a central base 92, an active driving wheel 93, a driven driving wheel 94, a driving chain 95, a first connecting rod 96, a second connecting rod 97, and a shaping plate 98, the central base 92 is penetrated in the central slide 91, and a first tooth 921 is provided on the outer edge of the central base 92, the number of the driven driving wheels 94 is two, which are respectively arranged at the upper and lower ends of the central base 92, the driving chain 95 is sleeved on the two driven driving wheels 94, and the shaping plate 98 is connected by the first connecting rod 9 6 and a second connecting rod 97 are connected to the driving chain 95, the two ends of the first connecting rod 96 are rotatably connected to the driving chain 95 and the shaping plate 98 respectively, the two ends of the second connecting rod 97 are rotatably connected to the driving chain 95 and the shaping plate 98 respectively, the active driving wheel 93 includes a first driving wheel 931 and a second driving wheel 932 arranged concentrically, the outer circumferential side surface of the first driving wheel 931 is provided with a second tooth 9311, the outer circumferential side surface of the second driving wheel is provided with a third tooth 9321, the first tooth 921 and the second tooth 9311 are meshed with each other, the third tooth 9321 and the driving chain 95 are meshed with each other, the density of the third tooth 9321 is greater than the density of the second tooth 9311, and the distinction between the density and size ensures that the central base 92 moves downward when the active driving wheel 31 rotates, and the driving chain 95 moves downward synchronously and rotates itself to tilt the shaping plate 98.

[0032] The shaping plate 98 is integrated with a vibration motor 99 to ensure that the shaping plate 98 does not stick when the center buckle portion 342 is formed.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plastic molding process for a zipper head in a zipper head with an anti-pull and anti-collision structure, characterized in that: The following steps are involved: S1, raw material mixing; picking up raw materials for mixing, the raw materials include polycarbonate particles and ABS resin particles, the two are mixed in a ratio of 1:1, the particles are mixed by a heating device, mixed in a molten state, and then stirred to obtain a mixed raw material, and after the raw material mixing is completed, the temperature is maintained at a constant temperature of 200 degrees Celsius; S2, heating the injection molding barrel of the injection molding device to 225 degrees Celsius-325 degrees Celsius, and at the same time heating the hot runner in the injection molding device to 50 degrees Celsius-70 degrees Celsius, and heating the injection mold to 70 degrees Celsius-90 degrees Celsius, and then adding the mixed raw materials to the injection molding barrel and heating to form a molten melt, and guiding the molten melt into the injection mold through the hot runner for injection molding; S3, the injection mold is subjected to pressure holding treatment, and the pressure holding time is 1.5 seconds to 3.0 seconds; S4, shaping and cooling; shaping the central locking part of the zipper head by a shaping device built into the injection mold, and switching the injection mold to a cooling mode at the same time, rapidly reducing the temperature to 40 degrees Celsius to 60 degrees Celsius, demolding, and then placing on a cooling rack to cool to room temperature, thereby obtaining a zipper head in a zipper chain; The injection mold used includes an upper mold and a lower mold that cooperate with each other, the lower mold includes a first mold, a second mold, a third mold and a fourth mold that are separated from each other, and the zipper head is molded at one time by four separate molds. A accommodating cavity is arranged in the upper mold, and the shaping device is arranged in the accommodating cavity. The shaping device includes a central slide, a central base, an active driving wheel, a driven driving wheel, a driving chain, a first connecting rod, a second connecting rod, and a shaping plate. The central base is penetrated in the central slide, and a first tooth is arranged on the outer edge of the central base. There are two driven driving wheels, which are respectively arranged at the upper and lower ends of the central base. The chain is sleeved on the two driven driving wheels, and the shaping plate is connected to the driving chain through a first connecting rod and a second connecting rod, and the two ends of the first connecting rod are rotatably connected to the driving chain and the shaping plate respectively, and the two ends of the second connecting rod are rotatably connected to the driving chain and the shaping plate respectively, and the active driving wheel includes a first driving wheel and a second driving wheel arranged concentrically, and the first driving wheel is provided with a second tooth on the outer circumferential side surface, and the second driving wheel is provided with a third tooth on the outer circumferential side surface, the first tooth and the second tooth are meshed with each other, and the third tooth and the driving chain are meshed with each other, and the density of the third tooth is greater than the density of the second tooth.

2. The plastic molding process of a zipper slider in a zipper slider with an anti-pull and anti-collision structure according to claim 1, characterized in that: A vibration motor is integrated in the shaping plate.

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