Multi-layer kraft paper bag punching device

Abstract

The utility model discloses a multi-layer kraft paper bag punching device, and relates to the technical field of packaging products. The device comprises a collecting box, a base, a support, a cross beam, a pressing plate and a trepanning cutter, the base is arranged on the collecting box in a clamped mode, and the L-shaped support is arranged above the base; two symmetrically-distributed air cylinders are fixed to the top face of the horizontal portion of the support, piston rods of the telescopic ends of the two air cylinders downwards penetrate through the horizontal portion of the support and jointly fix a cross beam, and a pressing plate is arranged below the cross beam. Trepanning knives which are distributed at equal intervals are screwed in the cross beam in a penetrating manner; an air compressor is fixed to the top of the support between the two air cylinders. Through the arrangement of the support, the base, the collecting box, the cross beam, the perforating cutter, the pressing plate, the sliding block and the clamping piece, the problems that waste scraps generated during perforating of kraft paper bags can be accumulated in the perforating cutter, an auxiliary pressing and flattening part is lacked during perforating of the kraft paper bags, and clamping parts matched with the kraft paper bags of different sizes are lacked are solved.

Description

Technical Field

[0001] This utility model belongs to the field of packaging product technology, and in particular relates to a perforation device for multi-layer kraft paper bags. Background Technology

[0002] Kraft paper bags are non-toxic, odorless, and pollution-free, meeting national environmental protection standards. They are high-strength and environmentally friendly, making them one of the most popular eco-friendly packaging materials internationally. Kraft paper bags are increasingly widely used; they are commonly found in supermarkets, shopping malls, shoe stores, clothing stores, and other similar establishments, providing convenience for customers carrying their purchases. Kraft paper bags use 100% wood pulp paper as the base material and come in white and yellow. A PP film can be applied to the paper for waterproofing. Bag strength can be customized from one to six layers according to customer requirements, with printing and bag making integrated. Opening and sealing methods include heat sealing, paper sealing, and glued bottom. Kraft paper bags typically have 2-3 holes on each side. The two edge holes are usually used for attaching handles, while the middle hole is used for attaching locks, etc., or the middle hole may be omitted. However, in actual hole-making operations, the following drawbacks still exist:

[0003] For the opening of kraft paper bags, tubular opening knives are usually used. However, this causes waste paper to accumulate inside the opening knife, which affects the subsequent opening operation. If a spiked opening knife is used, it can only puncture, which can easily cause wrinkles at the opening and even affect the subsequent installation of the handle, resulting in insufficient sturdiness.

[0004] Secondly, when making holes in kraft paper bags, a large number of kraft paper bags are usually made together. If they are not stably pressed and flattened during the hole-making process, it is easy for them to shift during the hole-making process.

[0005] Finally, different manufacturers, different customers, and different types of products use kraft paper bags of different sizes. When making holes, it is necessary to keep the center of the kraft paper bag aligned. Therefore, clamping parts that are compatible with different sizes of kraft paper bags are required. Utility Model Content

[0006] The purpose of this utility model is to provide a multi-layer kraft paper bag punching device. By setting up a bracket, base, collection box, crossbeam, punching knife, pressure plate, slider, and clamping parts, it solves the problems that waste generated during kraft paper bag punching will accumulate in the punching knife, that there is no auxiliary pressing and flattening part during kraft paper bag punching, and that there is no clamping part adapted to kraft paper bags of different sizes.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model is a perforation device for multi-layer kraft paper bags, including a collection box, a base, a bracket, a crossbeam, a pressure plate and a perforating knife. The base is snapped onto the collection box, and an L-shaped bracket is set above the base. The vertical part of the bracket is fixed to the upper end of the base.

[0009] Two symmetrically distributed cylinders are fixed on the top surface of the horizontal part of the bracket. The piston rods of the two cylinders extend downward through the horizontal part of the bracket and are jointly fixed to a crossbeam. A pressure plate is provided below the crossbeam.

[0010] The crossbeam is threaded through with equally spaced perforating cutters; an air compressor is fixed to the top of the bracket between the two cylinders, and the air outlet of the air compressor is fixed with an air pipe equal in number to the perforating cutters, with the end of the air pipe away from the air compressor being fixedly connected to the upper end of the perforating cutter.

[0011] Furthermore, a filter screen is fixed through the front side of the collection box, and a slot is provided at the upper end of the collection box. The size of the slot is the same as that of the base, and the base is embedded in the slot. The upper end of the base is flush with the upper end of the collection box.

[0012] Furthermore, the base has two symmetrically distributed through slots. A sliding rod is fixed between the two end walls of the through slots. An I-shaped slider is slidably sleeved on the outside of the sliding rod. A clamping member is fixed at the upper end of the slider. A clamping spring is fixed on the opposite side of the two sliders. The other end of the clamping spring is connected to the end wall of the through slot in which it is located. The clamping spring is sleeved on the outside of the sliding rod in the through slot.

[0013] Furthermore, the upper end of the base is also fixed with symmetrically distributed limiting rods. The limiting rods are located between the through groove and the vertical part of the bracket. The ends of the crossbeam and the pressure plate that are close to each other are all sleeved on the same limiting rod. A compression spring is provided outside the limiting rod between the opposite surfaces of the crossbeam and the pressure plate. The upper and lower ends of the compression spring are fixed to the crossbeam and the pressure plate, respectively.

[0014] Furthermore, the base between the limiting rods is provided with equally spaced opening slots, and the pressure plate is provided with equally spaced through holes. The opening slots, the through holes above them, and the central axis of the opening knife are on the same vertical line, and the diameter of the through holes and the opening slots is larger than the diameter of the opening knife.

[0015] Furthermore, a baffle is provided below the horizontal part of the bracket. The baffle is fixed to the upper end of the base and is located between the opening slot and the vertical part of the bracket.

[0016] Furthermore, the piercing cutter is a tubular structure with openings at both ends, and the bottom end of the piercing cutter is a cutting edge. The upper part of the circumference of the piercing cutter is provided with external threads, and a limiting block is fixed on the outer circumference of the piercing cutter below the external threads. A threaded groove matching the external threads is opened in the crossbeam, and the piercing cutter is screwed into the threaded groove through the external threads. The upper end of the limiting block abuts against the bottom surface of the crossbeam.

[0017] This utility model has the following beneficial effects:

[0018] This invention solves the problem of waste debris accumulating inside the perforating knife during the perforation of kraft paper bags, thus affecting the perforation operation, by setting up a support, base, collection box, crossbeam, and perforating knife. During perforation, the cylinder on the support operates, driving the crossbeam and the perforating knife installed inside it to descend until the perforating knife penetrates all the kraft paper bags, thus completing the perforation operation. The waste debris generated after perforation will accumulate in the perforating knife. At this time, the air compressor operates, blowing air into the perforating knife, and the waste debris inside the perforating knife will enter the collection box. Then the perforating knife moves up to replace the next batch of kraft paper bags that need to be perforated, and the next batch of perforation operation can be carried out quickly.

[0019] This invention solves the problem of missing auxiliary pressing and flattening parts when punching holes in kraft paper bags, which easily leads to hole position deviation, by setting up a crossbeam and a pressure plate. When punching holes in kraft paper bags, the crossbeam and pressure plate descend simultaneously. The pressure plate contacts the kraft paper bag first, and the crossbeam continues to descend, compressing the pressure spring. At this time, the pressure plate presses and flattens the kraft paper bag to prevent position deviation. Then, the crossbeam continues to descend to cooperate with the punching knife to pass through the kraft paper bag for punching operations.

[0020] This invention solves the problem of lacking clamping components suitable for kraft paper bags of different sizes by setting up a slider and a clamping component. The kraft paper bags are stacked on the base, with their ends abutting against the baffle. At the same time, the slider is pulled outward and then released. At this time, under the action of the clamping spring, the slider and the clamping component are forced to move synchronously towards the kraft paper bags, clamping the kraft paper bags. This component can be used to clamp kraft paper bags of various sizes. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0022] Figure 1 A perspective view of a perforation device for multi-layer kraft paper bags;

[0023] Figure 2 This is a diagram showing the state before drilling;

[0024] Figure 3 This is a diagram showing the state after drilling;

[0025] Figure 4 This is a structural diagram of the collection box;

[0026] Figure 5 This is a diagram showing the connection between the base and the support.

[0027] Figure 6 This is a connection diagram of the beam and the pressure plate;

[0028] Figure 7 This is a disassembly diagram of the beam and pressure plate.

[0029] Figure label:

[0030] 1. Collection box; 101. Filter screen; 102. Slot; 2. Base; 201. Through groove; 202. Slider; 203. Clamping component; 204. Opening groove; 205. Baffle; 206. Limiting rod; 207. Sliding rod; 208. Clamping spring; 3. Bracket; 301. Cylinder; 302. Air compressor; 3021. Air pipe; 4. Crossbeam; 401. Compression spring; 402. Threaded groove; 5. Pressure plate; 501. Through hole; 6. Opening tool; 601. External thread; 602. Limiting block. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0032] Please see Figure 1-7 As shown, this utility model is a multi-layer kraft paper bag punching device, including a collection box 1, a base 2, a bracket 3, a crossbeam 4, a pressure plate 5 and a punching knife 6. The base 2 is snapped onto the collection box 1, and an L-shaped bracket 3 is set above the base 2. The vertical part of the bracket 3 is fixed to the upper end of the base 2.

[0033] The base 2 is placed above the collection box 1, and the bracket 3 is fixed on the base 2 as a mounting carrier;

[0034] Two symmetrically distributed cylinders 301 are fixed on the top surface of the horizontal part of the bracket 3. The piston rods of the extension and retraction ends of the two cylinders 301 penetrate downward through the horizontal part of the bracket 3 and are jointly fixed to the crossbeam 4. A pressure plate 5 is provided below the crossbeam 4.

[0035] The cylinder 301 is mounted on the bracket 3. When the cylinder 301 is working, it can drive the crossbeam 4 and the pressure plate 5 below it to descend and perform the corresponding drilling operation.

[0036] The crossbeam 4 is threaded through with equally spaced perforating cutters 6; an air compressor 302 is fixed to the top of the bracket 3 between the two cylinders 301, and an air pipe 3021 with the same number of perforating cutters 6 is fixed to the air outlet end of the air compressor 302, and the end of the air pipe 3021 away from the air compressor 302 is fixedly connected to the upper end of the perforating cutter 6.

[0037] The perforator 6 is used to perforate kraft paper bags. The waste generated after perforation is placed in the inner cavity of the perforator 6. At this time, the air compressor 302 is activated, and its compressed air is ejected and output from the air pipe 3021 into the perforator 6, blowing out the waste in the inner cavity of the perforator 6 and collecting it in the collection box 1. The air pipe 3021 has sufficient length to move with the crossbeam 4.

[0038] A filter screen 101 is fixed through the front side of the collection box 1. A slot 102 is provided at the upper end of the collection box 1. The size of the slot 102 is the same as that of the base 2, and the base 2 is embedded in the slot 102. The upper end of the base 2 is flush with the upper end of the collection box 1.

[0039] The filter 101 is designed so that the collection box 1 has a corresponding air outlet, and the filter 101 can prevent waste debris from flying out of the collection box 1. The filter 101 and other structures can also be added below the through groove 201 to prevent waste debris from flying out. When installing the base 2, the base 2 can be embedded into the slot 102.

[0040] Two symmetrically distributed through slots 201 are provided in the base 2. A sliding rod 207 is fixed between the two end walls of the through slot 201. An I-shaped slider 202 is slidably sleeved on the outside of the sliding rod 207. A clamping member 203 is fixed at the upper end of the slider 202. A clamping spring 208 is fixed on the opposite side of the two sliders 202. The other end of the clamping spring 208 is connected to the end wall of the through slot 201 in which it is located. The clamping spring 208 is sleeved on the outside of the sliding rod 207 in the through slot 201 in which it is located.

[0041] Simultaneously, the slider 202 is pulled outward, compressing the clamping spring 208. The kraft paper bag is then placed on the base 2 and positioned between the two clamping members 203. Subsequently, they are released simultaneously. At this time, under the action of the clamping spring 208, the slider 202 and the clamping members 203 are forced to move synchronously towards the kraft paper bag, clamping both sides of the kraft paper bag. This component can clamp kraft paper bags of various sizes. The slide bar 207 helps to limit the position of the slider 202 and the clamping spring 208.

[0042] The upper end of the base 2 is also fixed with symmetrically distributed limiting rods 206. The limiting rods 206 are located between the through groove 201 and the vertical part of the bracket 3. The ends of the crossbeam 4 and the pressure plate 5 that are close to each other are all sleeved on the same limiting rod 206. A compression spring 401 is provided on the outside of the limiting rod 206 between the opposite surfaces of the crossbeam 4 and the pressure plate 5. The upper and lower ends of the compression spring 401 are fixed to the crossbeam 4 and the pressure plate 5 respectively.

[0043] During the downward movement of the crossbeam 4 and the pressure plate 5, the limiting rod 206 limits their position to prevent them from shifting and to maintain their stability. During the entire downward movement, the pressure plate 5 first contacts the kraft paper bag. At this time, the crossbeam 4 continues to move downward, and the compression spring 401 is compressed. With continuous compression, the pressure plate 5 will firmly press the kraft paper bag, which will facilitate the subsequent punching operation.

[0044] The base 2 between the limiting rods 206 has equally spaced opening slots 204, and the pressure plate 5 has equally spaced through holes 501. The opening slots 204, the through holes 501 above them, and the central axis of the opening knife 6 are on the same vertical line. The diameter of the through holes 501 and the opening slots 204 is larger than the diameter of the opening knife 6.

[0045] When the hole opener 6 makes a hole, it first passes through the through hole 501 on the pressure plate 5, then through all the kraft paper bags, and finally the bottom of the hole opener 6 is located in the hole opening groove 204. At this time, the waste inside the hole opener 6 can be cleaned so that the waste can directly enter the collection box 1.

[0046] A baffle 205 is also provided below the horizontal part of the bracket 3. The baffle 205 is fixed to the upper end of the base 2 and is located between the opening slot 204 and the vertical part of the bracket 3. The end of the kraft paper bag that needs to be opened is placed against the baffle 205 to ensure neatness.

[0047] The hole-opening knife 6 is a tubular structure with open ends, and the bottom end of the hole-opening knife 6 is a cutting edge. The upper part of the periphery of the hole-opening knife 6 is provided with an external thread 601. The outer periphery of the hole-opening knife 6 below the external thread 601 is fixed with a limiting block 602. The crossbeam 4 is provided with a threaded groove 402 that matches the external thread 601. The hole-opening knife 6 is screwed into the threaded groove 402 through the external thread 601, and the upper end of the limiting block 602 abuts against the bottom surface of the crossbeam 4.

[0048] Only the tubular hole punch 6 can punch a complete round hole without any residue. When installing the hole punch 6, screw it into the threaded groove 402 inside the crossbeam 4 through the external thread 601 until the limiting block 602 abuts against the bottom surface of the crossbeam 4 to complete the installation. Then connect the upper end of the hole punch 6 to the air pipe 3021.

[0049] The specific working principle of this utility model is as follows: First, the slider 202 is pulled outward simultaneously, compressing the clamping spring 208. Then, the kraft paper bag is placed on the base 2, and the end of the kraft paper bag that needs to be perforated is placed against the baffle 205 to ensure neatness. Then, the slider 202 is released. At this time, under the action of the clamping spring 208, the slider 202 and the clamping member 203 are forced to move synchronously towards the kraft paper bag, clamping both sides of the kraft paper bag. Subsequently, the cylinder 301 works, driving the crossbeam 4 and the pressure plate 5 below it to descend. During the downward movement of the crossbeam 4 and the pressure plate 5, they are limited by the limiting rod 206 to prevent their position from shifting. During the downward movement, the pressure plate 5 first connects to the base 2. When the kraft paper bag is touched, the crossbeam 4 continues to move downward, and the compression spring 401 is compressed. With continuous compression, the pressure plate 5 will firmly press the kraft paper bag until the perforating knife 6 descends, first passing through the through hole 501 on the pressure plate 5, and then through all the kraft paper bags. Finally, the bottom end of the perforating knife 6 is located in the perforation groove 204, and the perforation is completed. The waste generated after perforation is in the inner cavity of the perforating knife 6. At this time, the air compressor 302 is activated, and its compressed air is sprayed out and output from the air pipe 3021 into the perforating knife 6, blowing out the waste in the inner cavity of the perforating knife 6 and collecting it in the collection box 1. Finally, the cylinder 301 is activated, moving the perforating knife 6 upward, and the perforated kraft paper bag can be taken out.

[0050] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A perforation device for multi-layer kraft paper bags, comprising a collection box (1), a base (2), a support (3), a crossbeam (4), a pressure plate (5), and a perforating knife (6), characterized in that: The collection box (1) is fitted with a base (2), and an L-shaped bracket (3) is provided above the base (2). The vertical part of the bracket (3) is fixed to the upper end of the base (2). Two symmetrically distributed cylinders (301) are fixed on the top surface of the horizontal part of the bracket (3). The piston rods of the extension and retraction ends of the two cylinders (301) penetrate downward through the horizontal part of the bracket (3) and are jointly fixed with a crossbeam (4). A pressure plate (5) is provided below the crossbeam (4). The crossbeam (4) is threaded through with equally spaced perforating cutters (6); an air compressor (302) is fixed to the top of the bracket (3) between the two cylinders (301), and the air outlet of the air compressor (302) is fixed with an air pipe (3021) equal in number to the perforating cutters (6), and the end of the air pipe (3021) away from the air compressor (302) is fixedly connected to the upper end of the perforating cutter (6).

2. The multi-layer kraft paper bag punching device according to claim 1, characterized in that: A filter screen (101) is fixed through the front side of the collection box (1). A slot (102) is provided at the upper end of the collection box (1). The size of the slot (102) is the same as that of the base (2). The base (2) is embedded in the slot (102). The upper end of the base (2) is flush with the upper end of the collection box (1).

3. The multi-layer kraft paper bag punching device according to claim 1, characterized in that: The base (2) has two symmetrically distributed through slots (201). A slide rod (207) is fixed between the two end walls of the through slot (201). An I-shaped slider (202) is slidably sleeved on the outside of the slide rod (207). A clamping member (203) is fixed at the upper end of the slider (202). A clamping spring (208) is fixed on the opposite side of the two sliders (202). The other end of the clamping spring (208) is connected to the end wall of the through slot (201) where it is located. The clamping spring (208) is sleeved on the outside of the slide rod (207) in the through slot (201) where it is located.

4. The multi-layer kraft paper bag punching device according to claim 1, characterized in that: The upper end of the base (2) is also fixed with symmetrically distributed limiting rods (206). The limiting rods (206) are located between the through groove (201) and the vertical part of the bracket (3). The ends of the crossbeam (4) and the pressure plate (5) that are close to each other are all sleeved on the same limiting rod (206). A compression spring (401) is provided on the limiting rod (206) between the opposite surfaces of the crossbeam (4) and the pressure plate (5). The upper and lower ends of the compression spring (401) are fixed to the crossbeam (4) and the pressure plate (5) respectively.

5. The perforation device for multi-layer kraft paper bags according to claim 4, characterized in that: The base (2) between the limiting rods (206) has equally spaced opening slots (204), and the pressure plate (5) has equally spaced through holes (501). The opening slots (204) and the central axis of the through holes (501) and the opening knife (6) above them are on the same vertical line. The diameter of the through holes (501) and the opening slots (204) is larger than the diameter of the opening knife (6).

6. The multi-layer kraft paper bag punching device according to claim 1, characterized in that: A baffle (205) is also provided below the horizontal part of the bracket (3). The baffle (205) is fixed to the upper end of the base (2) and is located between the opening groove (204) and the vertical part of the bracket (3).

7. The multi-layer kraft paper bag punching device according to claim 1, characterized in that: The piercing cutter (6) is a tubular structure with open ends, and the bottom end of the piercing cutter (6) is a cutting edge. The upper part of the circumference of the piercing cutter (6) is provided with an external thread (601). A limiting block (602) is fixed on the outer circumference of the piercing cutter (6) below the external thread (601). A threaded groove (402) matching the external thread (601) is opened in the crossbeam (4), and the piercing cutter (6) is screwed into the threaded groove (402) through the external thread (601). The upper end of the limiting block (602) abuts against the bottom surface of the crossbeam (4).

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