Child lock zipper welding former

Abstract

The present application belongs to the technical field of child lock zipper welding auxiliary device, and discloses a former for child lock zipper welding. The former for child lock zipper welding comprises a bending module and a separation module. The bending module is provided with a bending channel. The channel can make the two sides of the zipper gradually bend along the moving direction of the zipper. The separation module comprises a separation sheet and a limiting plate. The separation sheet can separate the handle part from the adhesive tape. The separation sheet and the limiting plate form a channel for the adhesive tape. The separation sheet is arranged apart from the bending module, and there is a separation space between the separation sheet and the bending module. The handle part can be separated from the adhesive tape when passing through the separation space. The former for child lock zipper welding has the beneficial effect of ensuring that the handle part and the adhesive tape do not stick together when entering the heat sealing and welding process, thereby reducing the frequency of defective products after zipper welding and forming, and improving the yield of zipper welding.

Description

Technical Field

[0001] This invention relates to the technical field of auxiliary devices for welding child lock zippers, and in particular to a forming device for welding child lock zippers. Background Technology

[0002] The child lock zipper is a traditional zipper where one of the four rubber strips closest to the bag opening is not welded. Instead, this strip is cut into multiple handle sections spaced at certain intervals. Because the handle sections are not welded, the point of force is shifted, thus achieving the child lock function. Adults can open the bag opening by using the handles to return the point of force. This design cleverly achieves a low-cost and efficient child lock function.

[0003] However, when this type of child lock zipper is welded to the composite film bag forming process, the handles, which are originally used as adhesive strips, are not continuous in the direction of zipper movement due to the gap between them. As a result, when welding the three adhesive strips, the moving handles can easily slip to the opposite side of the adhesive strip, causing the handles and adhesive strips to be heat-sealed together, making the bag unable to open and resulting in a defective product.

[0004] Therefore, there is an urgent need to develop a forming device for welding child lock zippers to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a forming device for welding child lock zippers, so as to improve the yield of zippers during the welding and heat sealing process.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A forming tool for welding child lock zippers, the zipper comprising two sub-pieces, each sub-piece having a handle portion and an adhesive strip portion respectively disposed on the same side, the forming tool for welding child lock zippers being used to separate the handle portion and the adhesive strip portion, characterized in that the forming tool for welding child lock zippers comprises:

[0008] A bending module is provided with a bending channel, which enables the handle portion and the adhesive strip portion of the zipper to bend gradually on both sides along the moving direction of the zipper.

[0009] The separation module includes a separator and a limiting plate. The separator can separate the handle portion from the rubber strip portion. A channel is formed between the separator and the limiting plate for the rubber strip portion to pass through. The separator and the bending module are spaced apart, and there is a separation space between the separator and the bending module. The handle portion can separate from the rubber strip portion when passing through the separation space.

[0010] Preferably, the separation module further includes a frame, the separator is connected to the limiting plate through the frame, the limiting plate is provided with an inclined surface along the length direction of the child lock zipper welding forming device, the inclined surface cooperates with the separator to make the rubber strip part bend.

[0011] Preferably, the separation module further includes a limiting piece disposed on the frame and located between the bending module and the separation space. A channel is formed between the limiting piece and the limiting plate for the handle portion and the rubber strip portion to pass through. The inclined portion cooperates with the limiting piece to keep the handle portion and the rubber strip portion in a bent state.

[0012] Preferably, at least two limiting pieces are provided, and at least two limiting pieces are symmetrically arranged on both sides of the length direction of the limiting plate; and / or

[0013] At least two partition plates are provided, and at least two partition plates are symmetrically arranged on both sides of the length direction of the limiting plate; and / or

[0014] At least two inclined surfaces are provided, and at least two inclined surfaces are symmetrically arranged on both sides of the limiting plate along the length direction of the limiting plate; and / or

[0015] At least two partition spaces are provided, and the at least two partition spaces are symmetrically arranged on both sides of the length direction of the limiting plate.

[0016] Preferably, the length of the limiting piece along the width direction of the molding tool for welding the child lock zipper is greater than the difference between the length of the rubber strip along its own width direction and the length of the handle along its own width direction.

[0017] Preferably, the limiting plate is provided with a flat portion, which is disposed between at least two symmetrically arranged inclined portions. The length of the separator along the width direction of the child lock zipper welding forming device is greater than the difference between the length of the inclined portion along the width direction of the child lock zipper welding forming device and the length of the handle portion along its own width direction.

[0018] Preferably, the zipper further includes a buckle portion, wherein the difference between the length of the flat portion along the width direction of the forming device for welding the child lock zipper and the length of the buckle portion along its own width direction is in the range of 1mm-3mm.

[0019] Preferably, the length of the bending module along the width direction of the molding tool for welding the child lock zipper is twice the sum of the length of the rubber strip along its own width direction and the length of the buckle along its own width direction.

[0020] Preferably, the length of the dividing space along the length direction of the molding tool for welding the child lock zipper is greater than the length of the handle portion along its own length direction.

[0021] Preferably, the curved channel includes an inlet end and an outlet end, the inlet end having a rectangular cross-section along the length of the child lock zipper welding forming device, and the outlet end having an arched cross-section along the length of the child lock zipper welding forming device.

[0022] Beneficial effects:

[0023] This invention improves the design of a forming device for welding child lock zippers. The zipper includes two sub-pieces, with a handle and a rubber strip respectively located on the same side of each sub-piece. The forming device for welding child lock zippers separates the handle and the rubber strip. The forming device includes a bending module and a separating module. The bending module has a bending channel that allows the handle and the rubber strip to bend gradually along both sides of the zipper's movement direction. The separating module includes a separator and a limiting plate. The separator separates the handle and the rubber strip, forming a channel between the separator and the limiting plate for the rubber strip to pass through. The separator and the bending module are spaced apart, creating a separation space between them, allowing the handle to separate from the rubber strip when passing through the separation space.

[0024] By designing a bending channel, the zipper gradually bends on both sides along its direction of movement as it passes the bending module. This limits the movement of the zipper's handle and adhesive strip on both sides. The inclusion of a partition, dividers, and limiting plates ensures that the handle rebounds when passing through the partition, separating it from the adhesive strip. The adhesive strip, under the influence of the dividers, limiting plates, and bending module, maintains the same bending state as within the bending module. The dividers further separate the adhesive strip from the handle, preventing adhesion during the heat-sealing process. This reduces the frequency of defective zippers after welding and improves the overall yield rate. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the zipper structure provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the welded zipper provided in the embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the forming device for welding child lock zippers provided in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the child lock zipper welding forming device and the zipper provided in an embodiment of the present invention;

[0030] Figure 5 This is a top view of the forming device for welding child lock zippers provided in an embodiment of the present invention;

[0031] Figure 6 This is a left view of the forming device for welding child lock zippers provided in an embodiment of the present invention.

[0032] In the picture:

[0033] 1. Bending module; 11. Bending channel; 111. Inlet end; 112. Outlet end;

[0034] 2. Separation module; 21. Limiting plate; 22. Separating space; 23. Separating plate; 24. Limiting plate; 241. Angled part; 242. Flat part; 25. Frame;

[0035] 3. Guide plate;

[0036] 100. Zipper; 101. Handle; 102. Adhesive strip; 103. Buckle; 200. Backing panel; 300. Bag body; 400. Heat seal. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] Figure 1 A schematic diagram of the structure of the zipper 100 provided in this embodiment is shown. Figure 2 A structural schematic diagram of the welded zipper 100 provided in this embodiment is shown. (See attached diagram.) Figure 1 and Figure 2 As shown, the zipper 100 includes two sub-pieces. A handle portion 101 and an adhesive strip portion 102 are respectively provided on the same side of the two sub-pieces. A locking portion 103 is provided at the connection between the two sub-pieces. One side of the locking portion 103 is provided with an adhesive strip portion 102 and a handle portion 101, and the other side is provided with two adhesive strip portions 102. The child lock zipper welding forming device provided in this embodiment is used to separate the handle portion 101 of this type of zipper 100 from its corresponding adhesive strip portion 102 before welding the zipper 100. Since there is a certain gap between the handle portion 101 that originally serves as the adhesive strip portion 102, the handle portion 101 is discontinuous in the direction of movement of the zipper 100. As a result, when the welding point of the three adhesive strip portions 102 is welded on the heat-sealing part 400, the moving handle portion 101 can easily slip to the position of the adhesive strip portion 102 on the opposite side, which leads to the handle portion 101 and the adhesive strip portion 102 being heat-sealed together, making the bag body 300 unable to be opened.

[0042] It should be noted that in this embodiment, one side of the locking part 103 is provided with a rubber strip part 102 and a handle part 101, and the other side is provided with two rubber strip parts 103. In other embodiments, one side of the locking part 103 is provided with a rubber strip part 102 and a handle part 101, and the other side may also be provided with a rubber strip part 102 and a handle part 101. This embodiment does not specifically limit the other side of the locking part 103.

[0043] Figure 3 This embodiment shows a schematic diagram of the forming device for welding child lock zippers. Figure 4 A schematic diagram of the child lock zipper welding forming device and the zipper 100 provided in this embodiment is shown. Figure 3 and Figure 4 and combined Figure 1 As shown, to solve the above problems, this embodiment provides a forming device for welding child lock zippers. The forming device for welding child lock zippers includes a bending module 1 and a separating module 2. The bending module 1 is provided with a bending channel 11, which enables the handle part 101 and the adhesive strip part 102 of the zipper 100 to bend gradually on both sides along the moving direction of the zipper 100. The separating module 2 includes a separator 23 and a limiting plate 24. The separator 23 can separate the handle part 101 and the adhesive strip part 102 on the zipper 100. A channel for the adhesive strip part 102 to pass through is formed between the separator 23 and the limiting plate 24. The separator 23 is spaced apart from the bending module 1, and there is a separating space 22 between the separator 23 and the bending module 1. The handle part 101 can separate from the adhesive strip part 102 when passing through the separating space 22.

[0044] By setting the bending channel 11, when the zipper 100 passes the bending module 1, the handle portion 101 and the adhesive strip portion 102 of the zipper 100 can gradually bend on both sides along the moving direction of the zipper 100, thereby limiting the handle portion 101 and the adhesive strip portion 102 of the zipper 100 on both sides along the moving direction of the zipper 100. By setting the partition space 22, the partition piece 23 and the limiting plate 24, the handle portion 101 on the zipper 100 can return to its original position when passing the partition space 22. The elastic force causes the zipper to spring up, thus separating it from the adhesive strip 102 of the zipper 100 row. The adhesive strip 102, under the action of the separator 23, the limiting plate 24 and the bending module 1, always maintains the same bending state as in the bending module 1. The separator 23 separates the adhesive strip 102 from the handle 101, thereby ensuring that the two do not stick together when entering the heat sealing welding process, thereby reducing the frequency of defective products after the zipper 100 is welded and improving the yield rate of the zipper 100 welding.

[0045] Furthermore, the separation module 2 also includes a frame 25, and the separator 23 is connected to the limiting plate 24 through the frame 25. The limiting plate 24 is provided with a beveled part 241 along the length direction of the molding tool for welding the child lock zipper 100. The beveled part 241 and the separator 23 cooperate to keep the rubber strip 102 in a bent state, thereby ensuring that the rubber strip 102 is always in a bent state, and also keeping the handle part 101 and the rubber strip 102 always separated to prevent them from sticking together.

[0046] Furthermore, the separation module 2 also includes a limiting piece 21, which is disposed on the frame 25 and located between the bending module 1 and the separation space 22. The limiting piece 21 and the limiting plate 24 form a channel for the handle part 101 and the rubber strip part 102 to pass through. The inclined part 241 cooperates with the limiting piece 21 to keep the handle part 101 and the rubber strip part 102 in a bent state. The limiting piece 21 can limit the zipper 100 after it has been bent through the bending channel 11, thereby ensuring the limiting effect of the zipper 100 after it has been bent and preventing the handle part 101 from popping up before it has passed through the separation space 22, which would affect the separation effect of the forming device for welding the child lock zipper.

[0047] It should be noted that the limiting piece 21 can be set accordingly for different shapes of handle parts 101. The limiting piece 21 can be selectively set according to the different shapes of zippers 100 being welded, so as to improve the separation effect and applicability of the forming tool for welding child lock zippers.

[0048] Furthermore, at least two limiting pieces 21 are provided, and at least two limiting pieces 21 are symmetrically arranged on both sides of the length direction of the limiting plate 24; at least two separating pieces 23 are provided, and at least two separating pieces 23 are symmetrically arranged on both sides of the length direction of the limiting plate 24; at least two inclined surfaces 241 are provided, and at least two inclined surfaces 241 are symmetrically arranged on both sides of the limiting plate 24 along the length direction of the limiting plate 24; at least two separating spaces 22 are provided, and at least two separating spaces 22 are symmetrically arranged on both sides of the length direction of the limiting plate 24.

[0049] By symmetrically setting the limiting piece 21, the dividing piece 23, the inclined surface 241, and the dividing space 22, the child lock zipper welding forming tool can limit and divide the zipper 100 at different handle parts 101 positions, thereby improving the usability of the child lock zipper welding forming tool.

[0050] It should be noted that when the handle part 101 is located below the zipper 100 and the corresponding rubber strip part 102 is located above, it is only necessary to flip the child lock zipper welding forming tool to adapt to the zipper 100 where the handle part 101 is located below.

[0051] Furthermore, the forming device for welding child lock zippers also includes a guide plate 3, which is disposed between the separator 23 and the backing plate 200, thereby maintaining the separation between the handle part 101 and the adhesive strip part 102 until it is fed onto the backing plate 200, thus ensuring that the handle part 101 does not slip onto the side of the adhesive strip part 102 and cause accidental burns.

[0052] Figure 5 A top view of the forming device for welding child lock zippers provided in this embodiment is shown. Figure 5 and combined Figures 1-4 As shown, the length L3 of the limiting piece 21 along the width direction of the molding tool for welding the child lock zipper 100 is greater than the difference between the length L8 of the rubber strip 102 along its own width direction and the length L10 of the handle 101 along its own width direction, thereby ensuring that the limiting piece 21 can restrict the handle 101 and the rubber strip 102 from popping up, thus ensuring the limiting effect of the limiting piece 21.

[0053] Furthermore, the limiting plate 24 is provided with a flat portion 242, which is disposed between at least two symmetrically arranged inclined portions 241. The length L5 of the separator 23 along the width direction of the molding tool for welding the child lock zipper 100 is greater than the difference between the length L4 of the inclined portion 241 along the width direction of the molding tool for welding the child lock zipper 100 and the length L10 of the handle portion 101 along its own width direction. This ensures that the separated handle portion 101 will not slip to the side of its corresponding rubber strip portion 102, thereby ensuring that the handle portion 101 and the rubber strip portion 102 are separated.

[0054] Furthermore, the length L2 of the dividing space 22 along the length direction of the molding tool for welding the child lock zipper is greater than the length L7 of the handle part 101 along its own length direction, so that the handle part 101 can be separated from its corresponding rubber strip part 102 at the position of the dividing space 22 by the action of its own elastic force.

[0055] Preferably, the difference between the length L6 of the flat portion 242 along the width direction of the child lock zipper welding forming device and the length L9 of the buckle portion 103 along its own width direction is within the range of 1mm-3mm, thereby ensuring that the buckle portion 103 will not shift along the width direction of the child lock zipper welding forming device during the movement of the zipper 100, which would affect the separation effect between the handle portion 101 and its corresponding adhesive strip portion 102.

[0056] Preferably, the length L1 of the bending module 1 along the width direction of the child lock zipper welding forming device is twice the sum of the length L8 of the adhesive strip 102 along its own width direction and the length L9 of the buckle 103 along its own width direction. This ensures that the zipper 100 does not shift along the width direction of the child lock zipper welding forming device when it moves in the bending channel 11, thus affecting the separation effect between the handle 101 and its corresponding adhesive strip 102.

[0057] Figure 6 A left view of the forming device for welding child lock zippers provided in this embodiment is shown. Figure 6 and combined Figure 3 and Figure 4 As shown, the curved channel 11 includes an inlet end 111 and an outlet end 112. The cross-section of the inlet end 111 along the length direction of the child lock zipper welding forming device is set as rectangular, and the cross-section of the outlet end 112 along the length direction of the child lock zipper welding forming device is set as arched. By setting the inlet end 111 and the outlet end 112, the zipper 100 is prevented from getting stuck when entering the curved channel 11, and the arched outlet end 112 can ensure that the zipper 100 bends smoothly.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A forming device for welding child lock zippers, wherein the zipper (100) comprises two sub-pieces, and a handle portion (101) and an adhesive strip portion (102) are respectively provided on the same side of the two sub-pieces, and the forming device for welding child lock zippers is used to separate the handle portion (101) and the adhesive strip portion (102), characterized in that, The forming device for welding the child lock zipper includes: A bending module (1) is provided with a bending channel (11) inside the bending module (1), which enables the handle part (101) and the adhesive strip part (102) of the zipper (100) to bend gradually on both sides along the moving direction of the zipper (100); The separation module (2) includes a separator (23) and a limiting plate (24). The separator (23) can separate the handle part (101) from the rubber strip part (102). A channel for the rubber strip part (102) to pass through is formed between the separator (23) and the limiting plate (24). The separator (23) is spaced apart from the bending module (1). There is a separation space (22) between the separator (23) and the bending module (1). The handle part (101) can separate from the rubber strip part (102) when passing through the separation space (22). The separation module (2) also includes a frame (25), the partition plate (23) is connected to the limiting plate (24) through the frame (25), the limiting plate (24) is provided with a beveled part (241) along the length direction of the child lock zipper welding forming device, the beveled part (241) and the partition plate (23) cooperate to make the rubber strip part (102) bend. At least two inclined surfaces (241) are provided, and at least two inclined surfaces (241) are symmetrically arranged on both sides of the limiting plate (24) along the length direction of the limiting plate (24); The limiting plate (24) is provided with a flat part (242), which is disposed between at least two symmetrically arranged inclined parts (241). The length of the partition piece (23) along the width direction of the child lock zipper welding forming device is greater than the difference between the length of the inclined part (241) along the width direction of the child lock zipper welding forming device and the length of the handle part (101) along its own width direction. The length of the partition space (22) along the length direction of the child lock zipper welding forming device is greater than the length of the handle part (101) along its own length direction.

2. The forming device for welding child lock zippers according to claim 1, characterized in that, The separation module (2) further includes a limiting piece (21), which is disposed on the frame (25). The limiting piece (21) is located between the bending module (1) and the separation space (22). A channel is formed between the limiting piece (21) and the limiting plate (24) for the handle part (101) and the rubber strip part (102) to pass through. The inclined part (241) cooperates with the limiting piece (21) to make the handle part (101) and the rubber strip part (102) bend.

3. The forming device for welding child lock zippers according to claim 2, characterized in that, At least two limiting pieces (21) are provided, and at least two limiting pieces (21) are symmetrically arranged on both sides of the length direction of the limiting plate (24); and / or At least two partition plates (23) are provided, and at least two partition plates (23) are symmetrically arranged on both sides of the length direction of the limiting plate (24); and / or At least two partition spaces (22) are provided, and at least two partition spaces (22) are symmetrically arranged on both sides of the length direction of the limiting plate (24).

4. The forming device for welding child lock zippers according to claim 3, characterized in that, The length of the limiting piece (21) along the width direction of the molding tool for welding the child lock zipper is greater than the difference between the length of the rubber strip (102) along its own width direction and the length of the handle (101) along its own width direction.

5. The forming device for welding child lock zippers according to claim 1, characterized in that, The zipper (100) also includes a buckle (103), and the difference between the length of the flat portion (242) along the width direction of the child lock zipper welding forming device and the length of the buckle (103) along its own width direction is in the range of 1mm-3mm.

6. The forming device for welding child lock zippers according to claim 5, characterized in that, The length of the bending module (1) along the width direction of the molding tool for welding the child lock zipper is twice the length of the rubber strip (102) along its own width direction and the length of the buckle (103) along its own width direction.

7. The forming device for welding child lock zippers according to any one of claims 1-2, characterized in that, The curved channel (11) includes an inlet end (111) and an outlet end (112). The cross-section of the inlet end (111) along the length direction of the child lock zipper welding forming device is set as rectangular, and the cross-section of the outlet end (112) along the length direction of the child lock zipper welding forming device is set as arched.

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