A punching device for plastic bag production

Abstract

This utility model relates to a punching device for plastic bag production, including a base plate, an unwinding roller, and a rewinding roller. The unwinding roller and the rewinding roller are respectively disposed on the left and right sides of the base plate. The same support frame is disposed on the front and rear sides of the base plate, and the support frame spans above the base plate. A punching mechanism is disposed between the front and rear sides of the inner wall of the support frame. A first cylinder with its output end connected to the punching mechanism is mounted on the support frame. This punching device for plastic bag production, through the design of the adjustment component, can easily adjust the spacing between adjacent cutters. A second cylinder drives the adjustment plate to move. The horizontal and oblique grooves on the adjustment plate cooperate with the drive rod to adjust the spacing between the sleeve and the cutter. The connecting seat and the cutter are connected by internal and external threads, which facilitates the replacement of the cutter, thereby adjusting the number of punches and meeting the diverse needs of different customers for the punching spacing of plastic bags.

Description

Technical Field

[0001] This utility model relates to the field of plastic bag production technology, specifically to a punching device for plastic bag production. Background Technology

[0002] In the modern plastic bag production process, the perforation process is crucial to meeting the diverse functional requirements of products. For example, plastic bags used for preservation need to be perforated to ensure air permeability, while plastic bags for carrying need to be perforated to provide handles. However, the commonly used plastic bag perforation devices currently available have significant limitations.

[0003] Taking the punching equipment for producing plastic bags disclosed in Chinese Patent Publication No. CN219446278U as an example, the number of holes punched and the spacing between holes are both fixed.

[0004] In actual production, different customers have vastly different requirements for the perforation specifications of plastic bags. Some customers require a small number of holes with large spacing to be punched in the plastic bags for special ventilation needs; while other customers need a large number of closely spaced small holes to achieve specific filtration or air permeability functions. When faced with these diverse needs, the existing devices with fixed perforation number and spacing are inadequate. If the perforation number and spacing are to be changed, it is often necessary to make complex mechanical adjustments to the entire perforation device, or even replace some key components. This not only consumes a lot of time and labor costs, but also causes long-term production interruptions, which seriously affects production efficiency.

[0005] In addition, the pace of product updates in the market is accelerating, and the design of plastic bags is constantly innovating. New design concepts may require punching various irregularly arranged holes in plastic bags to achieve a unique appearance or function. However, existing punching devices lack the ability to flexibly adjust the number and spacing of holes, making it impossible to respond quickly to these innovative demands and limiting the product innovation capabilities and market competitiveness of plastic bag manufacturers. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a punching device for plastic bag production, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a punching device for producing plastic bags, comprising a base plate, an unwinding roller, and a winding roller;

[0008] The unwinding roller and the winding roller are respectively arranged on the left and right sides of the base plate, and the same support frame is arranged on the front and rear sides of the base plate, with the support frame straddling the top of the base plate.

[0009] A punching mechanism is provided between the front and rear sides of the inner wall of the support frame, and a first cylinder with its output end connected to the punching mechanism is installed on the support frame.

[0010] The punching mechanism includes a horizontal plate slidably connected between the front and rear sides of the inner wall of the support frame, at least three sleeves slidably connected to the outside of the horizontal plate, a connecting seat is fitted at the bottom of the sleeves, a drive rod is fitted at the top of each of the at least three sleeves, and a cutter is detachably installed inside the connecting seat.

[0011] The horizontal plate is also provided with an adjustment assembly that is connected to the drive rod for adjusting the spacing between two adjacent sleeves.

[0012] Furthermore, an internal thread is provided on the inner circumferential wall of the sleeve;

[0013] Corresponding to the internal thread, an external thread adapted to the internal thread is provided on the outside of the cutter.

[0014] Furthermore, corresponding to at least three of the aforementioned cutters, a square opening is provided inside the base plate for the cutters to pass through.

[0015] Furthermore, guide rails are installed on both the front and rear sides of the inner wall of the support frame, and sliding grooves adapted to the two guide rails are respectively opened on the front and rear sides of the horizontal plate.

[0016] Furthermore, the adjustment assembly includes a mounting plate mounted on the upper surface of the horizontal plate, and the output end of the first cylinder is throttle-connected to the mounting plate to drive the mounting plate and the horizontal plate to move up and down;

[0017] The mounting plate has a second cylinder installed on both the front and rear sides of its upper surface. An adjustment plate is slidably connected to the upper surface of the horizontal plate. The adjustment plate is connected to the output end of the two second cylinders through two connecting plates.

[0018] The adjusting plate has a transverse groove extending along the length of the base plate inside, and at least two oblique grooves are also provided inside the adjusting plate, with the at least two oblique grooves located on the front and rear sides of the transverse groove respectively.

[0019] At least three of the drive rods are respectively inserted inside the at least two of the oblique slots and transverse slots.

[0020] Furthermore, the oblique grooves on the left and right sides are arranged in a mirror image.

[0021] Furthermore, the front cross-section of the connecting plate is L-shaped.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This punching equipment for plastic bag production allows for easy adjustment of the spacing between adjacent cutters through its adjustable component design. A second cylinder drives an adjusting plate, and the interlocking horizontal and oblique grooves on the adjusting plate with the drive rod adjust the spacing between the sleeve and the cutter. The connecting seat and the cutter are connected via internal and external threads, facilitating cutter replacement and thus adjusting the number of punches to meet the diverse needs of different customers for the punching spacing of plastic bags. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the drilling mechanism of this utility model;

[0026] Figure 3 This is a partial structural diagram of the punching mechanism of this utility model;

[0027] Figure 4 This is a schematic diagram of the disassembled structure of the connecting seat and the cutter of this utility model.

[0028] In the diagram: 1. Base plate; 2. Unwinding roller; 3. Rewinding roller; 4. Punching mechanism; 401. Horizontal plate; 402. Sleeve; 403. Connecting seat; 404. Cutting knife; 405. Mounting plate; 406. Second cylinder; 407. Adjusting plate; 408. Horizontal groove; 409. Inclined groove; 410. Connecting plate; 411. Drive rod; 5. First cylinder; 6. Support frame. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-4 This embodiment of a punching device for producing plastic bags includes a base plate 1, an unwinding roller 2, a winding roller 3, a punching mechanism 4, a first cylinder 5, and a support frame 6. The unwinding roller 2 and the winding roller 3 are respectively arranged on the left and right sides of the base plate 1 for conveying and recycling the plastic bag roll to be punched. The same support frame 6 is arranged on the front and rear sides of the base plate 1. The support frame 6 spans above the base plate 1 to provide installation support for components such as the punching mechanism 4.

[0031] In detail, the drilling mechanism 4 includes a horizontal plate 401, a sleeve 402, a connecting seat 403, a cutter 404, a drive rod 411, and an adjustment assembly. The horizontal plate 401 is slidably connected between the front and rear sides of the inner wall of the support frame 6, and at least three sleeves 402 are slidably connected to the outer side of the horizontal plate 401. In this embodiment, five sleeves 402 are preferably provided.

[0032] The bottom of the sleeve 402 is equipped with a connecting seat 403. A cutter 404 is detachably installed inside the connecting seat 403. The inner circumferential wall of the sleeve 402 is provided with an internal thread. Correspondingly, the outer side of the cutter 404 is provided with an external thread that matches the internal thread. The cutter 404 and the connecting seat 403 can be detachably installed through the threaded connection. At the same time, corresponding to the cutter 404, a square opening is provided inside the base plate 1 for the cutter 404 to pass through, so that the cutter 404 can punch holes in the plastic bag.

[0033] Each of the five sleeves 402 is equipped with a drive rod 411 at its top, and the cross plate 401 is also provided with an adjustment assembly that is connected to the drive rod 411 for adjusting the distance between two adjacent sleeves 402.

[0034] In actual setup, guide rails are installed on both the front and rear sides of the inner wall of the support frame 6. The horizontal plate 401 in the drilling mechanism 4 has sliding grooves on its front and rear sides that are adapted to the two guide rails, so that the horizontal plate 401 can slide between the front and rear sides of the inner wall of the support frame 6. A first cylinder 5 is installed on the support frame 6, and its output end is connected to the drilling mechanism 4 for transmission, providing power for the up and down movement of the drilling mechanism 4.

[0035] More specifically, the adjustment assembly includes a mounting plate 405, a second cylinder 406, an adjustment plate 407, a transverse groove 408, an oblique groove 409, and a connecting plate 410. The mounting plate 405 is mounted on the upper surface of the horizontal plate 401, and the output end of the first cylinder 5 is connected to the mounting plate 405 for transmission, so as to drive the mounting plate 405 and the horizontal plate 401 to move up and down.

[0036] The front and rear sides of the upper surface of the mounting plate 405 are equipped with second cylinders 406. The upper surface of the horizontal plate 401 is slidably connected to the adjusting plate 407. The adjusting plate 407 is connected to the output end of the two second cylinders 406 through two connecting plates 410. The front cross-section of the connecting plate 410 is L-shaped. This shape design can stably transmit the power of the second cylinders 406.

[0037] A transverse groove 408 is formed inside the adjusting plate 407 along the length of the base plate 1. At least two oblique grooves 409 are also formed inside the adjusting plate 407. In this embodiment, four oblique grooves 409 are provided, located on the front and rear sides of the transverse groove 408 respectively, and the oblique grooves 409 on the left and right sides are mirror images of each other. Five drive rods 411 are respectively inserted into the four oblique grooves 409 and the transverse groove 408.

[0038] In actual setup, the horizontal plate 401 and the sleeve 402 are slidably connected, allowing the sleeve 402 to move left and right on the horizontal plate 401, thus providing the possibility of adjusting the spacing between adjacent cutters 404. The assembly of the sleeve 402 with the connecting seat 403, and the engagement of the connecting seat 403 with the cutter 404 through internal and external threads, facilitates the replacement of the cutter 404, thereby adjusting the number of holes. In addition, when the cutter 404 wears out or needs to be replaced with a cutter 404 of a different specification, the operation is simple and convenient, reducing equipment maintenance costs.

[0039] In actual use, the connection between the drive rod 411 and the sleeve 402 enables the adjustment component to move the sleeve 402 via the drive rod 411. The mounting plate 405 in the adjustment component is connected to the output end of the first cylinder 5. When the first cylinder 5 is working, it can drive the mounting plate 405 and the horizontal plate 401 to move up and down, thereby driving the cutter 404 to move up and down, thus realizing the punching action on the plastic bag.

[0040] In addition, the second cylinder 406 is connected to the adjusting plate 407 via the connecting plate 410. When the second cylinder 406 extends or retracts, it can drive the adjusting plate 407 to move left and right. The transverse groove 408 and the oblique groove 409 on the adjusting plate 407 cooperate with the drive rod 411. When the adjusting plate 407 moves left and right, the drive rod 411 moves in the groove, thereby driving the sleeve 402 to slide on the horizontal plate 401, realizing the adjustment of the distance between adjacent sleeves 402. Since the oblique grooves 409 on the left and right sides are mirrored, the sleeves 402 on both sides of the transverse groove 408 can move symmetrically when the adjusting plate 407 moves, ensuring the symmetry of the distance adjustment.

[0041] In addition, the square opening on the base plate 1 corresponds to the cutter 404, providing space for the cutter 404 to penetrate the base plate 1 and punch holes in the plastic bag, avoiding obstruction of the cutter 404's movement by the base plate 1, and ensuring the smooth progress of the punching operation.

[0042] The working principle of the above embodiments is as follows:

[0043] (1) According to production needs, select a suitable cutter 404 and install it on the connecting seat 403 through threaded connection. Install the plastic bag roll to be punched on the unwinding roller 2 and pull one end of the roll to the take-up roller 3 to ensure that the roll is laid flat on the base plate 1. Start the second cylinder 406. The output end of the second cylinder 406 drives the adjusting plate 407 to move left and right through the connecting plate 410. Since the drive rod 411 is inserted into the transverse groove 408 and the oblique groove 409 of the adjusting plate 407 respectively, when the adjusting plate 407 moves, the drive rod 411 will slide in the groove, thereby driving the sleeve 402 to slide on the horizontal plate 401. By controlling the extension and retraction of the second cylinder 406, the distance between adjacent sleeves 402 is adjusted, thereby realizing the adjustment of the punching distance between adjacent cutters 404.

[0044] (2) After the spacing adjustment is completed, start the first cylinder 5. The output end of the first cylinder 5 drives the mounting plate 405 to move downward. The mounting plate 405 drives the horizontal plate 401 to slide downward along the guide rail of the support frame 6. The sleeve 402, connecting seat 403 and cutter 404 on the horizontal plate 401 move downward accordingly. The cutter 404 passes through the plastic bag and enters the square opening of the bottom plate 1 to complete one punching action. Then, the first cylinder 5 drives the punching mechanism 4 to reset upward. In addition, when the cutter 404 is worn or the number of punches needs to be changed, the excess cutter 404 can be unscrewed, or the old cutter 404 can be replaced with a new cutter 404. The operation is simple and convenient.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A punching device for producing plastic bags, characterized in that: Includes base plate, unwinding roll and rewinding roll; The unwinding roller and the winding roller are respectively arranged on the left and right sides of the base plate, and the same support frame is arranged on the front and rear sides of the base plate, with the support frame straddling the top of the base plate. A punching mechanism is provided between the front and rear sides of the inner wall of the support frame, and a first cylinder with its output end connected to the punching mechanism is installed on the support frame. The punching mechanism includes a horizontal plate slidably connected between the front and rear sides of the inner wall of the support frame, at least three sleeves slidably connected to the outside of the horizontal plate, a connecting seat is fitted at the bottom of the sleeves, a drive rod is fitted at the top of each of the at least three sleeves, and a cutter is detachably installed inside the connecting seat. The horizontal plate is also provided with an adjustment assembly that is connected to the drive rod for adjusting the spacing between two adjacent sleeves.

2. The punching equipment for producing plastic bags according to claim 1, characterized in that: An internal thread is provided on the inner circumferential wall of the sleeve; Corresponding to the internal thread, an external thread adapted to the internal thread is provided on the outside of the cutter.

3. The punching equipment for producing plastic bags according to claim 1, characterized in that: Corresponding to at least three of the aforementioned cutters, a square opening is provided inside the base plate for the cutters to pass through.

4. The punching equipment for producing plastic bags according to claim 1, characterized in that: Guide rails are installed on both the front and rear sides of the inner wall of the support frame, and sliding grooves adapted to the two guide rails are respectively opened on the front and rear sides of the horizontal plate.

5. The punching equipment for producing plastic bags according to claim 1, characterized in that: The adjustment assembly includes a mounting plate installed on the upper surface of the horizontal plate, and the output end of the first cylinder is connected to the mounting plate for driving the mounting plate and the horizontal plate to move up and down. The mounting plate has a second cylinder installed on both the front and rear sides of its upper surface. An adjustment plate is slidably connected to the upper surface of the horizontal plate. The adjustment plate is connected to the output end of the two second cylinders through two connecting plates. The adjusting plate has a transverse groove extending along the length of the base plate inside, and at least two oblique grooves are also provided inside the adjusting plate, with the at least two oblique grooves located on the front and rear sides of the transverse groove respectively. At least three of the drive rods are respectively inserted inside the at least two of the oblique slots and transverse slots.

6. The punching equipment for producing plastic bags according to claim 5, characterized in that: The oblique grooves on the left and right sides are arranged in a mirror image.

7. A punching device for producing plastic bags according to claim 5, characterized in that: The front cross-section of the connecting plate is L-shaped.

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