Positioning device based on zipper teeth and injection molding equipment

Abstract

The utility model discloses a positioning device based on zipper teeth and injection molding equipment, and relates to the technical field of zipper production equipment. The two bases are symmetrically arranged on the lower die; the first end of the rotating block is connected with the base through a reset spring, and a positioning convex point is arranged on the top surface of the rotating block; a notch is formed in the top surface of the zipper channel. The zipper pressing plate is used for pressing the zipper; the first end of the pressing rod extends out of the side face of the base, the second end of the pressing rod is connected with a sensor, and the sensor is used for detecting whether the pressing rod axially moves or not. According to the positioning device based on the zipper teeth and the injection molding equipment, the technical problems that when an existing zipper injection molding mechanism is used, the positioning accuracy of a zipper cloth belt is poor, and the zipper quality is unstable are solved; whether the zipper reaches a designated position or not is judged by detecting whether the pressing rod axially moves or not through the sensor, a zipper cloth belt can be accurately positioned, and the zipper quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of zipper production equipment, in particular to a positioning device and injection molding equipment based on zipper teeth. Background Art

[0002] As the society is showing a demand for personalized clothing, a large number of zipper products have appeared on clothing. Among them, nylon injection molded zippers are widely favored by clothing manufacturers and customers because of their light weight, thin chain teeth and low production cost. The market share of injection molded double-opening zippers is also increasing.

[0003] like Figure 1 As shown, the positions that need to be injected are the upper and lower stops of a single zipper, but in the production process, the upper stop of the previous zipper is actually continuous with the upper stop of the next zipper, so the lower stop of the previous zipper and the upper stop of the next zipper are always injected together during injection molding, wherein there is no chain tooth between the lower stop of the previous zipper and the upper stop of the next zipper. The existing fully automatic double-open zipper injection molding mechanism presses the zipper tape through a pressing wheel, and relies on the pressing wheel to sense the gap of the zipper tape for positioning.

[0004] However, the positioning accuracy of the above zipper injection molding mechanism is poor, resulting in the top and bottom teeth of the injection molded product being high and low, and the bottom stop position being deviated, and the zipper quality being unstable. Therefore, a positioning device based on zipper teeth and an injection molding device are proposed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a positioning device and injection molding equipment based on zipper chain teeth, which solves the technical problems that the existing zipper injection molding mechanism has poor positioning accuracy for the zipper tape during use, resulting in the injection molded product having upper stop height and lower stop position deviation, and unstable zipper quality.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a positioning device based on a zipper element, comprising:

[0007] Lower mold;

[0008] A base, wherein two bases are symmetrically arranged on the top surface of the lower mold;

[0009] A rotating block is rotatably connected to the side of the base, and a first end of the rotating block is connected to the base via a return spring, and a positioning convex point is provided on the top surface of the rotating block, and the positioning convex point supports the zipper;

[0010] A zipper channel is arranged on the top surface of the base, and a notch is arranged on the top surface of the zipper channel, and the notch is used for penetrating the positioning protrusion.

[0011] The press chain plate is disposed directly above the zipper channel, and the press chain plate is used to press the zipper;

[0012] The press rod is inserted through the side surface of the base. The first end of the press rod extends out of the side surface of the base, and the second end of the press rod is connected to the sensor. The sensor is used to detect whether the press rod undergoes axial movement.

[0013] Preferably, a rotating shaft is provided on the side surface of the base, and the rotating shaft is rotatably connected to the rotating block.

[0014] Preferably, a spring seat is provided on the side surface of the base. The top surface of the spring seat is connected to the first end of the return spring, and the second end of the return spring is connected to the rotating block.

[0015] Preferably, an assembly hole is provided on the side surface of the base. The assembly hole penetrates through the base, and the assembly hole is slidably connected to the press rod.

[0016] Preferably, the end of the first end of the press rod is hemispherical, and the end surface of the first end of the press rod abuts against the rotating block.

[0017] Preferably, an installation frame is provided on the top surface of the lower mold. The top surface of the installation frame is connected to both ends of the press chain plate, and the bottom surface of the middle part of the press chain plate abuts against the top surface of the zipper.

[0018] Preferably, a chain separating mold is provided on the top surface of the lower mold. The chain separating mold is used to separate the two zipper tapes in the zipper.

[0019] Preferably, the side surface of the positioning bump is an inclined slope surface, and the side surface of the positioning bump is smoothly connected to the top surface of the zipper channel.

[0020] Preferably, an arc-shaped slope surface is provided at the entrance end of the zipper channel, and the arc-shaped slope surface is smoothly connected to the top surface of the zipper channel.

[0021] A zipper injection molding device includes the positioning device based on zipper teeth as described in any one of the above.

[0022] Compared with the above background art, a positioning device based on zipper teeth provided by the present utility model has the following beneficial effects. When the zipper teeth pass through the positioning bump, the zipper reaches the designated position. At this time, the zipper teeth push the positioning bump downward, the rotating block rotates a certain angle, and the pressing rod axially moves a certain distance under the pushing action of the rotating block. The sensor detects the axial movement of the pressing rod, and the towing device stops towing the zipper tape. That is, according to the action of whether the teeth press the positioning bump, it is further determined whether the zipper reaches the designated position by detecting whether the pressing rod axially moves through the sensor. Compared with the traditional positioning method that relies on the pressure wheel to sense the notch of the zipper tape, the positioning of the zipper tape is more accurate, thus avoiding the problems of uneven upper stops and deviation of the lower stop positions of the injection-molded products, and effectively improving the quality of the zipper. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0024] Figure 1 is a schematic plan view of a zipper in the prior art;

[0025] Figure 2 is an assembly schematic diagram of the positioning device based on zipper teeth and the assembly rack provided by the embodiment of the present utility model;

[0026] Figure 3 is a three-dimensional structure diagram of the positioning device based on zipper teeth provided by the embodiment of the present utility model;

[0027] Figure 4 is a three-dimensional structure diagram of the base provided by the embodiment of the present utility model;

[0028] Figure 5 is an assembly schematic diagram of the lower mold and the chain pressing plate provided by the embodiment of the present utility model.

[0029] Specifically, 1 - assembly rack; 101 - upper mold; 102 - lower mold; 3 - zipper tape; 4 - chain pressing plate; 5 - chain separating mold; 6 - rotating block; 601 - positioning bump; 602 - rotating shaft; 7 - base; 8 - sensor; 9 - pressing rod; 10 - spring seat; 11 - return spring; 12 - upper stop position; 13 - lower stop position. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] As Figure 2 and Figure 3 shown, to achieve the above object, the present invention provides a positioning device based on a zipper tooth, including: an upper die 101 and a lower die 102 provided on an assembly rack 1.

[0033] Among them, two bases 7 are symmetrically arranged on the top surface of the lower die 102. A rotating block 6 is rotatably connected to the side surface of the base 7, and the upper end of the rotating block 6 is connected to the base 7 through a return spring 11. Among them, under the supporting force of the return spring 11, the position state of the rotating block 6 remains unchanged. In addition, a positioning bump 601 is provided on the top surface of the rotating block 6, and the positioning bump 601 abuts against the zipper.

[0034] A zipper channel is provided on the top surface of the base 7. Among them, a notch is provided on the top surface of the zipper channel, and the notch is used for passing through the positioning bump 601. Specifically, the positioning bump 601 enters the notch from the bottom surface of the zipper channel, and the top surface of the positioning bump 601 is higher than the top surface of the zipper channel. Under the abutting action of the zipper teeth, the positioning bump 601 can completely enter the notch. At this time, the positioning bump 601 drives the rotating block 6 to rotate a certain angle.

[0035] It should be noted that a pressing plate 4 is provided directly above the zipper channel. The pressing plate 4 is used to press the zipper so that the zipper is always in a pressed state. On the one hand, it can ensure that the zipper tape 3 is kept in a tensioned state. On the other hand, it can ensure that the bottom surface of the zipper always abuts against the positioning bump 601. When the zipper teeth pass by the positioning bump 601, the zipper teeth can abut against the positioning bump 601 and move it downward.

[0036] In addition, a pressure rod 9 is inserted through the side surface of the base 7. The left end of the pressure rod 9 extends out of the side surface of the base 7, and the right end of the pressure rod 9 is connected to a sensor 8. The sensor 8 is used to detect whether the pressure rod 9 moves axially. When the sensor 8 detects that the pressure rod 9 moves axially, it is determined that the zipper reaches the specified position. At this time, the towing device (not shown in the figure) stops towing the zipper tape 3. Specifically, the sensor 8 can transmit the signal of the axial movement of the pressure rod 9 to the control system. After receiving the signal of the axial movement of the pressure rod 9, the control system sends a signal to the towing device to stop towing the zipper tape 3.

[0037] During use, the zipper tape 3 is towed forward by the towing device. When the part of the zipper tape 3 without zipper teeth in the middle passes over the positioning bump 601, the zipper tape 3 is not sufficient to hold up the positioning bump 601 to overcome the supporting force of the return spring 11, that is, the positioning bump 601 will not be pushed down by the zipper tape 3 and cannot trigger the induction. When the zipper teeth pass over the positioning bump 601, the zipper reaches the specified position. At this time, the zipper teeth push down the positioning bump 601, the rotating block 6 rotates a certain angle, the return spring 11 is compressed by a certain length by the upper end of the rotating block 6 and has a certain elastic potential energy, the pressure rod 9 moves axially by a certain distance under the pushing action of the rotating block 6, and the sensor 8 detects the axial movement of the pressure rod 9, and the towing device stops towing the zipper tape 3. By detecting whether the pressure rod 9 moves axially by the sensor 8 to judge whether the zipper reaches the specified position, compared with the traditional method of positioning by relying on the pressure wheel to sense the notch of the zipper tape 3, the positioning of the zipper tape 3 is more accurate, effectively avoiding the problems of uneven upper stops and deviation of the lower stop position 13 of the injection-molded products.

[0038] As Figure 4 shown, in an embodiment of the present invention, a rotating shaft 602 is provided on the left side of the base 7. The rotating shaft 602 is perpendicular to the side surface of the base 7. The rotating shaft 602 is rotatably connected to the rotating block 6. Specifically, the right end of the rotating shaft 602 is embedded in the side surface of the base 7, the right end of the rotating shaft 602 penetrates through the rotating block 6, and the rotating block 6 cannot slide relative to the rotating shaft 602 along the axial direction of the rotating shaft 602 to ensure that the rotating block 6 can stably push the pressure rod 9. When the rotating block 6 rotates counterclockwise by a certain angle, the rotating block 6 can completely press the left end of the pressure rod 9 into the base 7.

[0039] In addition, a spring seat 10 is provided on the side surface of the base 7. The top surface of the spring seat 10 is a horizontal plane. The top surface of the spring seat 10 is connected to the lower end of the return spring 11. Specifically, the return spring 11 is vertically arranged, and the upper end of the return spring 11 is connected to the upper end of the rotating block 6, which can push the rotating block 6. When the positioning bump 601 is not pushed by the zipper teeth, the rotating block 6 is in a balanced force state and maintains a certain position.

[0040] In one embodiment of the present utility model, an assembly hole is provided on the side surface of the base 7. The assembly hole penetrates through the base 7, and the pressure rod 9 is slidably connected to the assembly hole. The pressure rod 9 can freely slide within the assembly hole. In addition, it should be noted that the sensor 8 is fixed on the mounting bracket 1, and the position of the sensor 8 always remains unchanged. Preferably, the sensor 8 is a pressure sensor 8. When the pressure rod 9 undergoes an axial movement, the pressure sensor 8 detects the change in force, and then transmits the signal of the axial movement of the pressure rod 9 to the control system to complete the monitoring of the position state of the pressure rod 9.

[0041] Wherein, the left end of the pressure rod 9 is hemispherical, and the left end surface of the pressure rod 9 abuts against the rotating block 6. When the rotating block 6 rotates under the action of a jacking force, the edge position of the rotating block 6 will always tightly press against the left end surface of the pressure rod 9 until the right side surface of the rotating block 6 abuts against the left end surface of the pressure rod 9. At this time, the left end of the pressure rod 9 enters a certain distance into the assembly hole.

[0042] As Figure 5 shown, in one embodiment of the present utility model, a mounting bracket is provided on the top surface of the lower die 102. The two ends of the pressure chain plate 4 are connected to the top surface of the mounting bracket. The bottom surface of the middle part of the mounting bracket does not contact the top surface of the mounting bracket. Specifically, the bottom surface of the middle part of the pressure chain plate 4 abuts against the top surface of the zipper, that is, a certain jacking action is formed on the zipper. When the zipper is dragged and run, the height position of the pressure chain plate 4 relative to the zipper channel remains unchanged. At this time, the distance between the bottom surface of the pressure chain plate 4 and the top surface of the positioning bump 601 just passes through the zipper tape 3, and the zipper tape 3 will not jack the positioning bump 601 downward. When the zipper teeth pass between the bottom surface of the pressure chain plate 4 and the top surface of the positioning bump 601, the zipper teeth will jack the positioning bump 601 downward, so as to achieve the purpose of judging whether the zipper reaches the specified position.

[0043] It should be noted that a chain separating die 5 is provided on the top surface of the lower die 102. The chain separating die 5 is used to separate the two zipper tapes 3 in the zipper. When the zipper moves forward under the drive of the towing device, the chain separating die 5 separates the teeth on the two zipper tapes 3 in the zipper, and according to the process requirements, ensures that the tapes on the left and right sides of the zipper are on both sides of the chain separating die 5, so as to ensure that the upper stop and the lower stop of the zipper can be exactly located at the upper stop position 12 and the lower stop position 13 of the zipper tape 3 respectively. In addition, a groove is provided in the middle part of the pressure chain plate 4. The groove cooperates with the chain separating die 5, and the chain separating die 5 does not prevent the pressure chain plate 4 from pressing tightly against the chain belt, ensuring that the bottom surface of the pressure chain plate 4 can smoothly press against the top surface of the zipper tape 3.

[0044] In one embodiment of the present utility model, the side surface of the positioning bump 601 is provided as an inclined slope surface. Specifically, the side surface of the positioning bump 601 is smoothly connected to the top surface of the zipper channel. When the zipper teeth come into contact with the positioning bump 601, the zipper teeth first abut against the inclined slope surface. Since the side surface of the positioning bump 601 is smoothly connected to the top surface of the zipper channel, there will be no phenomenon of the zipper teeth getting stuck at the position of the positioning bump 601.

[0045] In addition, an arc-shaped slope surface is provided at the inlet end of the zipper channel. The arc-shaped slope surface is smoothly connected to the top surface of the zipper channel, further preventing the zipper teeth from getting stuck at the inlet end of the zipper channel.

[0046] When the present utility model is in use, in the initial state, the positioning bump 601 enters the notch from the bottom surface of the zipper channel, and the top surface of the positioning bump 601 is higher than the top surface of the zipper channel. The towing device drags the zipper tape 3 forward. When the part of the zipper tape 3 without zipper teeth in the middle passes over the positioning bump 601, the zipper tape 3 is not sufficient to hold up the positioning bump 601 to overcome the supporting force of the return spring 11, and the positioning bump 601 will not be pushed down by the zipper tape 3, and the axial position of the pressure rod 9 will not change. When the zipper teeth pass over the positioning bump 601, the zipper reaches the specified position. At this time, the zipper teeth push down the positioning bump 601, the rotating block 6 rotates by a certain angle, the return spring 11 is compressed by a certain length by the upper end of the rotating block 6 and has a certain elastic potential energy, and the pressure rod 9 axially moves a certain distance under the pushing action of the rotating block 6. The sensor 8 detects that the pressure rod 9 has axially moved, and the sensor 8 transmits the signal of the axial movement of the pressure rod 9 to the control system. After receiving the signal of the axial movement of the pressure rod 9, the control system sends a signal to the towing device to stop dragging the zipper tape 3, and the towing device stops dragging the zipper tape 3 and enters the next process.

[0047] In addition to the above positioning device based on the zipper teeth, the present utility model also provides a zipper injection molding device including the positioning device based on the zipper teeth disclosed in the above embodiment. For the structures of other parts of this zipper injection molding device, please refer to the prior art and will not be elaborated herein.

[0048] It should be noted that a driving cylinder is provided at the top of the assembly rack 1. The driving cylinder is connected to the upper mold 101 through a piston rod. The upper mold 101 is located directly above the lower mold 102. The upper mold 101 and the lower mold 102 form an injection cavity, and the teeth are injection molded through the injection cavity.

[0049] In summary, according to the action of whether the teeth press the positioning bump 601, it is judged whether the zipper reaches the specified position by detecting whether the pressure rod 9 axially moves through the sensor 8, so as to accurately position the zipper tape 3, avoid problems such as uneven upper stops and deviation of the lower stop position of the injection molded product, and thus improve the quality of the zipper.

[0050] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0051] Specific examples are used in this article to illustrate the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. A positioning device based on zipper teeth, characterized in that, Comprising: Lower die; Base, two of said bases are symmetrically arranged on the top surface of the lower die; Rotating block, rotatably connected to the side surface of the base, and the first end of the rotating block is connected to the base by a return spring, a positioning bump is provided on the top surface of the rotating block, and the positioning bump abuts against the zipper; Zipper channel, provided on the top surface of the base, a notch is provided on the top surface of the zipper channel, and the notch is used for threading the positioning bump; Zipper pressing plate, provided directly above the zipper channel, and the zipper pressing plate is used for pressing the zipper; Pressing rod, passing through the side surface of the base, the first end of the pressing rod extends out of the side surface of the base, the second end of the pressing rod is connected to a sensor, and the sensor is used for detecting whether the pressing rod moves axially.

2. The positioning device based on zipper teeth according to claim 1, wherein A rotating shaft is provided on the side surface of the base, and the rotating shaft is rotatably connected to the rotating block.

3. The positioning device based on a zipper tooth according to claim 2, characterized in that A spring seat is provided on the side surface of the base, the top surface of the spring seat is connected to the first end of the return spring, and the second end of the return spring is connected to the rotating block.

4. The positioning device based on a zipper tooth according to claim 3, wherein, An assembly hole is provided on the side surface of the base, the assembly hole penetrates through the base, and the assembly hole is slidably connected to the pressing rod.

5. The positioning device based on a zipper tooth according to claim 4, characterized in that, The end of the first end of the pressing rod is provided as a hemispherical shape, and the end surface of the first end of the pressing rod abuts against the rotating block.

6. The positioning device based on a zipper tooth according to any one of claims 1-5, characterized in that, An installation frame is provided on the top surface of the lower die, the top surface of the installation frame is connected to both ends of the zipper pressing plate, and the bottom surface of the middle part of the zipper pressing plate abuts against the top surface of the zipper.

7. A positioning device based on a zipper tooth according to claim 6, characterized in that, A chain separating die is provided on the top surface of the lower die, and the chain separating die is used for separating the two zipper tapes in the zipper.

8. A positioning device based on a zipper tooth according to any one of claims 1-5, characterized in that, The side surface of the positioning bump is provided as an inclined slope surface, and the side surface of the positioning bump is smoothly connected to the top surface of the zipper channel.

9. A positioning device based on a zipper tooth according to any one of claims 1-5, characterized in that An arc-shaped slope surface is provided at the inlet end of the zipper channel, and the arc-shaped slope surface is smoothly connected to the top surface of the zipper channel.

10. A zipper injection molding device, characterized in that, Comprising the positioning device based on zipper teeth as described in any one of claims 1-9 above.

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