Anti-winding zipper head and plastic forming process thereof

Abstract

The invention relates to the field of zippers, in particular to an anti-winding zipper head and a plastic forming process thereof.The anti-winding zipper head comprises a zipper head body and a handle which are movably connected, and the handle is rotationally arranged on the zipper head body and used for applying external force to guide the zipper head body to move so as to control opening and closing of zipper teeth; the technical problem that in the process that an existing zipper head is meshed and matched with zipper teeth, a gap between the zipper head and the zipper teeth is too large, so that fabric or cloth belts or thread belts are prone to being rolled into the gap, and the winding phenomenon occurs is solved.

Description

Technical Field

[0001] The invention relates to the field of zippers, and in particular to an anti-winding zipper head and a plastic molding process thereof. Background Art

[0002] 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.

[0003] During use, the existing zipper adopts a meshing connection between the zipper puller and the chain, and it is easy to roll the chain tape or the fabric sewn with the chain tape into the gap between the zipper teeth and the teeth during the pulling process. On the one hand, the zipper teeth are stuck and cannot be pulled, and on the other hand, the hard contact between the zipper puller and the chain teeth causes pulling damage to the fabric. Especially for high-end textile fabrics or high-end leather materials, this pulling damage is often irreversible.

[0004] The invention patent with Chinese patent application number 202110400264.6 discloses a YG zipper head bidirectional safety lock and its production process. The key points of its technical solution are that it includes a slider body, a pull tab and an elastic member, a mounting groove for the pull tab to be installed is formed between the slider body and the elastic member, a connecting groove for the elastic member to be installed and a limit groove for the elastic member to extend are provided on the slider body, the pull tab is made of cold punching in one piece, the pull tab includes a flat upper surface layer and a flat lower surface layer, the pull tab includes a rotating part, the rotating part is rotatably connected in the mounting groove, and a convex block is provided on the rotating part. When the pull tab is perpendicular to the slider body, the elastic member retracts into the limit groove, and when the pull tab rotates to both sides of the slider body, the elastic member extends out of the limit groove. The YG zipper head bidirectional safety lock can lock the slider in both directions, improve the reminder effect for users, and reduce accidents. The technical solution proposed by the above invention does not propose a solution to the problem that the existing zipper slider is easy to pull the fabric, and various zipper sliders used on the market still have the technical problem of entanglement and pulling. Summary of the invention

[0005] Therefore, in order to solve the above problems, the present invention proposes an anti-entanglement zipper head and its plastic molding process, which solves the technical problem that the gap between the existing zipper head and the chain teeth is too large during the engagement process, which makes it easy for the fabric, cloth tape or wire tape to be rolled into the gap and cause entanglement.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical scheme: an anti-entanglement zipper chain head, comprising a chain head and a handle that are movably connected, wherein the handle is rotatably arranged on the chain head and is used to apply external force to guide the chain head to move, thereby controlling the opening and closing of the zipper teeth; The chain head comprises a support plate, a connecting mechanism, and a meshing mechanism, the support plate comprises an upper functional surface and a lower functional surface, the connecting mechanism is arranged on the upper functional surface of the support plate, the meshing mechanism is arranged on the lower functional surface of the support plate, the connecting mechanism is used to be rotatably connected with the handle, the meshing mechanism comprises a first meshing protrusion, a second meshing protrusion and a central meshing protrusion, the central meshing protrusion is arranged on the central axis of the support plate, the first meshing protrusion and the second meshing protrusion are symmetrically arranged on both sides of the central meshing protrusion, the first meshing protrusion is provided with a first bonding surface close to the central meshing protrusion, the second meshing protrusion is provided with a second bonding surface close to the central meshing protrusion, the first bonding surface and the second bonding surface are symmetrical to each other, the first bonding surface is provided with a first anti-winding structure, and the second bonding surface is provided with a second anti-winding structure, and during use, the first anti-winding structure and the second anti-winding structure are rollingly connected with the cloth tape of the zipper; The handle comprises a connecting rod and a pulling block which are fixedly connected.

[0007] Furthermore, the connecting mechanism includes a first connecting seat, a second connecting seat, and a snap-fitting pin. The first connecting seat and the second connecting seat are both arranged on the central axis of the support plate. A first slot is arranged on a side surface of the first connecting seat close to the second connecting seat, and a second slot is arranged on the second connecting seat. The snap-fitting pin is arranged in the first slot through a torsion spring and is snapped between the first slot and the second slot. The handle is rotated with the connecting mechanism by passing through the second connecting seat.

[0008] Furthermore, the snap-fitting pin is provided with a pin, and the pin penetrates downwardly through the upper functional surface of the support plate, and a top block is provided at the center position of the connecting rod. When the connecting rod is rotated until the top block abuts against the snap-fitting pin, the pin is lifted upward, and when the connecting rod is rotated until the top block is separated from the snap-fitting pin, the pin is inserted downward into the support plate.

[0009] Furthermore, the first anti-winding structure and the second anti-winding structure have the same structure, and the first anti-winding structure includes a plurality of clamping grooves arranged on the first bonding surface and balls embedded in the clamping grooves.

[0010] A plastic molding process for an anti-winding zipper pull 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 raw material conveying flow channel to 225 degrees Celsius-325 degrees Celsius, and introducing the raw material into the zipper chain head plastic molding device through the raw material conveying flow channel for injection molding operation; 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; cooling the zipper head by a cooling device built into the zipper head plastic molding device, so that the temperature of the zipper head plastic molding device is quickly reduced to 40 degrees Celsius-60 degrees Celsius, and then demolding, and then placing it on a cooling rack to cool to room temperature, to obtain a zipper head; S5. Assemble: Assemble the formed chain head and handle.

[0011] Furthermore, in step S4, the cooling device performs auxiliary demoulding operations on the molded zipper head during the shaping and cooling process.

[0012] Furthermore, the zipper link plastic molding device includes a plastic molding upper template and a plastic molding lower template that cooperate with each other, a first molding cavity is arranged on a side surface of the plastic molding upper template close to the plastic molding lower template, and a second molding cavity is arranged on a side surface of the plastic molding lower template close to the plastic molding upper template, the first molding cavity and the second molding cavity together constitute a plastic molding cavity, and the cooling device includes a first cooling part and a second cooling part, the first cooling part is arranged in the plastic molding upper template, and the second cooling part is arranged in the plastic molding lower template.

[0013] Furthermore, the first cooling part and the second cooling part have the same structure, the first cooling part is close to the first molding cavity, and the second cooling part is close to the second molding cavity. The first cooling part includes closely arranged cooling pipes and elastic toggle plates arranged on the inner walls of the cooling pipes. The cooling pipes are used for the circulation of coolant to cool the first molding cavity through heat transfer.

[0014] Furthermore, the elastic toggle plates are disposed around the inner wall of the cooling tube, and vertical projections of the elastic toggle plates do not overlap with each other.

[0015] Furthermore, the elastic toggle plate is a thin metal plate.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are: 1. Compared with the existing zipper head, the main improvement of the present invention is that by improving the structure at the connection between the zipper head and the zipper tape, the zipper head is prevented from getting stuck due to the surrounding fabrics or thread ends being entangled and unable to be pulled out during the process of pulling back and forth. In serious cases, it may also cause damage to the precious fabrics. At the same time, it can make the pulling process of the zipper head smoother. Specifically, a first bonding surface is provided on the first meshing portion of the zipper head, and a second bonding surface is provided on the second meshing portion. The first bonding surface and the second bonding surface are the parts where the zipper head directly contacts the zipper tape. The conventional structure designs the connection mode of this part as a sliding connection, while the present invention innovatively adopts a first anti-winding structure provided on the first bonding surface and a second anti-winding structure provided on the second bonding surface. The first anti-winding structure and the second anti-winding structure are used to achieve the connection with the zipper The rolling connection between the fabric tapes replaces the original sliding connection. The advantages of this are as follows: first, the rolling connection can make the clothing fabric or thread that may have entered the zipper head through the gap stop moving when it reaches the end of the gap. The principle is that one side of the fabric is in a rolling connection with the zipper head, the friction between the two is greatly reduced, and the pulling force between the zipper head and the zipper teeth is offset when they are engaged; second, when encountering fabrics with a rough surface or the fabric is accidentally entangled in the gap of the zipper head, it can also be easily pulled out. The principle is also that one end of the fabric is in a rolling connection with the zipper head, rather than a traditional sliding connection. When the entangled fabric is pulled out by external force, the fabric is in a rolling connection with the zipper head, and there is no friction between the two, so it can be easily pulled out without causing pulling damage.

[0017] 2. The first anti-winding structure and the second anti-winding structure in the present invention both adopt a ball structure. On the one hand, the ball structure can ensure that the zipper teeth and the zipper tape are in a rolling connection. Compared with the traditional sliding connection, it can reduce the generation of friction, thereby reducing the friction loss between the zipper teeth and the zipper head, and extending the service life of the zipper. On the other hand, the zipper teeth are engaged by a push-type engagement method through the ball, which is more efficient and smoother.

[0018] 3. The main improvement of the plastic molding process for zipper head proposed in the present invention compared with the traditional zipper head molding process is that: by performing molding and cooling while performing auxiliary demolding in step S4, the two are performed simultaneously to improve the production efficiency of the zipper head. As is known to all, the key points in the plastic molding process are the molding and demolding of the product. During the molding process, it is necessary to avoid the formation of cavities and surface pits or bubbles inside the product. After the molding is completed, it is necessary to cool down and demold in time. The two are key links in the plastic molding process. The present invention integrates and improves the two most critical links, and the working processes of the two cooperate with each other. The principle is that the first cooling part and the second cooling part are respectively arranged in the plastic molding upper template and the plastic molding lower template, and the two are respectively close to the first molding cavity and the second molding cavity. The cooling method Cooling is performed by heat transfer using a coolant, wherein both are tubular structures of cooling tubes, through which the coolant circulates, and a toggle plate is provided in the cooling tube. The elastic toggle plate is arranged around the inner wall of the cooling tube and is arranged in a direction pointing to the central axis of the cooling tube, that is, it is parallel to the cross-section of the cooling tube. In this way, when the coolant circulates, it will impact the elastic toggle plate on the inner wall of the cooling tube, and each elastic toggle plate will undergo elastic deformation after the impact, and the relatively arranged elastic toggle plates will abut against each other, thereby generating vibration and transmitting it to the first molding cavity and the second molding cavity, so as to cool and vibrate the molded zipper chain head and perform demolding operations, which greatly improves work efficiency. At the same time, along with the generation of vibration, bubbles and holes that may be generated inside and on the surface of the zipper chain head can also be removed.

[0019] 4. The elastic toggle plate in the present invention is made of a thin metal plate. The metal plate material has better metal elasticity and better resilience. The force generated by the toggle collision when the plates are directly pressed against each other is greater, and the vibration generated is more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle; Figure 3 It is a schematic diagram of the top view structure of the present invention; Figure 4 It is a bottom view structural schematic diagram of the present invention; Figure 5 It is a side structural sectional view of the present invention; Figure 6 This is a flow chart of the plastic molding process of the present invention; Figure 7 This is a schematic diagram of the internal structure of the zipper head plastic molding device of the present invention; Figure 8 A top view of the arrangement structure of the first cooling part in the present invention; Fig. 9 It is a cross-sectional view of the cooling pipe in the present invention. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-Figure 9 The present invention provides an anti-entanglement zipper head, comprising a movably connected head 1 and a handle 2, wherein the handle 2 is rotatably arranged on the head 1 and is used to apply an external force to guide the head 1 to move, thereby controlling the opening and closing of the zipper teeth; The chain head 1 includes a support plate 11, a connecting mechanism 12, and a meshing mechanism 13. The support plate 11 includes an upper functional surface and a lower functional surface. The connecting mechanism is arranged on the upper functional surface of the support plate 11, and the meshing mechanism 13 is arranged on the lower functional surface of the support plate 11. The connecting mechanism 12 is used for rotationally connecting with the handle 2. The meshing mechanism 13 includes a first meshing protrusion 131, a second meshing protrusion 132 and a central meshing protrusion 133. The central meshing protrusion 133 is arranged on the central axis of the support plate 11. The first meshing protrusion 131 and the second meshing protrusion 132 are in contact with each other. Said two sides of the central meshing convex portion 133 are arranged, the first meshing convex portion 131 is provided with a first fitting surface 1311 near the central meshing convex portion 133, the second meshing convex portion 132 is provided with a second fitting surface 1321 near the central meshing convex portion 133, the first fitting surface 1311 and the second fitting surface 1321 are symmetrical to each other, the first fitting surface 1311 is provided with a first anti-winding structure, and the second fitting surface 1321 is provided with a second anti-winding structure. During use, the first anti-winding structure and the second anti-winding structure are rollingly connected with the cloth tape of the zipper; The handle 2 includes a connecting rod 21 and a pull block 22 which are fixedly connected.

[0023] The connecting mechanism 12 includes a first connecting seat 121, a second connecting seat 122, and a buckling pin 123. The first connecting seat 121 and the second connecting seat 122 are both arranged on the central axis of the support plate 11. A first card slot 1211 is arranged on a side surface of the first connecting seat 121 close to the second connecting seat 122, and a second card slot 1221 is arranged on the second connecting seat 122. The buckling pin 123 is arranged in the first card slot 1211 through a torsion spring and buckled between the first card slot 1211 and the second card slot 1221. The handle 2 is rotated with the connecting mechanism 12 by being passed through the second connecting seat 122.

[0024] The buckling pin 123 is provided with a pin 1231, and the pin 1231 penetrates downwardly through the upper functional surface of the support plate 11. A top block 211 is provided at the center of the connecting rod 21. When the connecting rod 21 rotates until the top block 211 abuts against the buckling pin 123, the pin 1231 is lifted upward. When the connecting rod 21 rotates until the top block 211 separates from the buckling pin 123, the pin 1231 is inserted downward into the support plate 11. The first anti-winding structure and the second anti-winding structure have the same structure. The first anti-winding structure includes four clamping grooves 31 provided on the first fitting surface and balls 3 embedded in the clamping grooves 31. By providing the first anti-winding structure and the second anti-winding structure, the original connection method between the zipper chain head and the zipper cloth bag is changed from a sliding connection to a rolling connection, thereby reducing the friction between the two and reducing the risk of winding.

[0025] This embodiment simultaneously proposes a plastic molding process for the above-mentioned zipper slider, a plastic molding process for an anti-entanglement zipper slider, 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 raw material conveying flow channel to 225 degrees Celsius-325 degrees Celsius, and introducing the raw material into the zipper chain head plastic molding device through the raw material conveying flow channel for injection molding operation; 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; cooling the zipper head by a cooling device built into the zipper head plastic molding device, so that the temperature of the zipper head plastic molding device is quickly reduced to 40 degrees Celsius-60 degrees Celsius, and then demolding, and then placing it on a cooling rack to cool to room temperature, to obtain a zipper head; S5. Assemble: Assemble the formed chain head and handle.

[0026] Among them, in step S4, the cooling device performs auxiliary demoulding operation on the formed zipper head during the shaping and cooling process.

[0027] In the plastic molding process, the zipper head plastic molding device includes a plastic molding upper template 4 and a plastic molding lower template 5 that cooperate with each other, a first molding cavity 41 is arranged on a side surface of the plastic molding upper template 4 close to the plastic molding lower template 5, and a second molding cavity 51 is arranged on a side surface of the plastic molding lower template 5 close to the plastic molding upper template 4. The first molding cavity 41 and the second molding cavity 51 together constitute a plastic molding cavity, and the cooling device includes a first cooling part 6 and a second cooling part 7, the first cooling part 6 is arranged in the plastic molding upper template 4, and the second cooling part 7 is arranged in the plastic molding lower template 5, the first cooling part 6 and the second cooling part 7 have the same structure, the first cooling part 6 is close to the first molding cavity 41, and the second cooling part 7 is close to the second molding cavity 51. The first cooling part 6 includes a closely arranged cooling tube and an elastic toggle plate 8 arranged on the inner wall of the cooling tube. The cooling tube is used for the circulation of coolant to cool the first molding cavity 41 by heat transfer. The elastic toggle plate 8 is arranged on the inner wall of the cooling tube, and the vertical projections of each elastic toggle plate 8 do not overlap with each other. The elastic toggle plate 8 is a thin metal plate. When the elastic toggle plate 8 is impacted by the coolant, the adjacent elastic toggle plates 8 will contact and collide with each other and vibrate. The coolant is circulated intermittently to ensure that the elastic toggle plates 8 collide with each other at a certain frequency and generate vibrations of a certain frequency. At this time, the coolant is used to cool and dissipate the heat of the plastic molding cavity on the one hand, and on the other hand, it drives the elastic toggle plate 8 to vibrate to facilitate mold demolding and avoid bubbles and holes on its surface and inside.

[0028] 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.

[0029] 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. An anti-entanglement zipper chain head, comprising a chain head and a handle that are movably connected, characterized in that: The handle is rotatably disposed on the chain head, and is used to apply external force to guide the chain head to move, thereby controlling the opening and closing of the zipper teeth; The chain head comprises a support plate, a connecting mechanism, and a meshing mechanism, the support plate comprises an upper functional surface and a lower functional surface, the connecting mechanism is arranged on the upper functional surface of the support plate, the meshing mechanism is arranged on the lower functional surface of the support plate, the connecting mechanism is used to be rotatably connected with the handle, the meshing mechanism comprises a first meshing protrusion, a second meshing protrusion and a central meshing protrusion, the central meshing protrusion is arranged on the central axis of the support plate, the first meshing protrusion and the second meshing protrusion are symmetrically arranged on both sides of the central meshing protrusion, the first meshing protrusion is provided with a first bonding surface close to the central meshing protrusion, the second meshing protrusion is provided with a second bonding surface close to the central meshing protrusion, the first bonding surface and the second bonding surface are symmetrical to each other, the first bonding surface is provided with a first anti-winding structure, and the second bonding surface is provided with a second anti-winding structure, and during use, the first anti-winding structure and the second anti-winding structure are rollingly connected with the cloth tape of the zipper; The handle comprises a connecting rod and a pulling block which are fixedly connected.

2. The anti-entanglement zipper slider according to claim 1, characterized in that: The connecting mechanism includes a first connecting seat, a second connecting seat, and a buckling pin. The first connecting seat and the second connecting seat are both arranged on the central axis of the support plate. A first slot is arranged on a side surface of the first connecting seat close to the second connecting seat, and a second slot is arranged on the second connecting seat. The buckling pin is arranged in the first slot through a torsion spring and buckled between the first slot and the second slot. The handle is rotated with the connecting mechanism by passing through the second connecting seat.

3. The anti-entanglement zipper slider according to claim 2, characterized in that: The buckling pin is provided with a pin, and the pin penetrates downwardly through the upper functional surface of the support plate. A top block is provided at the center position of the connecting rod. When the connecting rod is rotated until the top block abuts against the buckling pin, the pin is lifted upward. When the connecting rod is rotated until the top block is separated from the buckling pin, the pin is inserted downward into the support plate.

4. The anti-tangle zipper slider according to claim 3, characterized in that: The first anti-winding structure and the second anti-winding structure have the same structure. The first anti-winding structure includes a plurality of clamping grooves arranged on the first bonding surface and balls embedded in the clamping grooves.

5. A plastic molding process for an anti-winding zipper slider as claimed in claim 4, characterized in that: The following steps are involved: 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 raw material conveying flow channel to 225 degrees Celsius-325 degrees Celsius, and introducing the raw material into the zipper chain head plastic molding device through the raw material conveying flow channel for injection molding operation; 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; cooling the zipper head by a cooling device built into the zipper head plastic molding device, so that the temperature of the zipper head plastic molding device is quickly reduced to 40 degrees Celsius-60 degrees Celsius, and then demolding, and then placing it on a cooling rack to cool to room temperature, to obtain a zipper head; S5. Assemble: Assemble the formed chain head and handle.

6. The plastic molding process of the anti-winding zipper slider according to claim 5, characterized in that: In step S4, the cooling device performs auxiliary demoulding operation on the molded zipper head during the shaping and cooling process.

7. The plastic molding process of the anti-winding zipper slider according to claim 6, characterized in that: The zipper link plastic molding device includes a plastic molding upper template and a plastic molding lower template that cooperate with each other. A first molding cavity is arranged on a side surface of the plastic molding upper template close to the plastic molding lower template, and a second molding cavity is arranged on a side surface of the plastic molding lower template close to the plastic molding upper template. The first molding cavity and the second molding cavity together constitute a plastic molding cavity. The cooling device includes a first cooling part and a second cooling part. The first cooling part is arranged in the plastic molding upper template, and the second cooling part is arranged in the plastic molding lower template.

8. The plastic molding process of the anti-winding zipper slider according to claim 7, characterized in that: The first cooling part and the second cooling part have the same structure. The first cooling part is close to the first molding cavity, and the second cooling part is close to the second molding cavity. The first cooling part includes closely arranged cooling pipes and elastic paddle plates arranged on the inner walls of the cooling pipes. The cooling pipes are used for the circulation of coolant to cool the first molding cavity through heat transfer.

9. The plastic molding process of the anti-winding zipper slider according to claim 8, characterized in that: The elastic toggle plates are disposed around the inner wall of the cooling tube, and vertical projections of the elastic toggle plates do not overlap with each other.

10. The plastic molding process of the anti-winding zipper slider according to claim 9, characterized in that: The elastic toggle plate is a thin metal plate.

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