Packaging bag joint cutting device

Abstract

The utility model discloses a packaging bag joint cutting device which comprises a bottom shell, the top of the bottom shell is fixedly connected with a middle frame, the top of the middle frame is fixedly connected with a top shell, first sliding plates penetrate through the top ends of the two sides of the inner wall of the middle frame, second sliding plates penetrate through the bottom ends of the two sides of the inner wall of the middle frame, and base plates are welded to the outer walls of one sides of the first sliding plates and the second sliding plates. The distance between the two sets of base plates is adjusted firstly, then the two ends of a packaging bag are fixed to the first sliding plates correspondingly, then an air cylinder is started, the joint cutting tool bit can move downwards rapidly, when the joint cutting tool bit makes contact with the packaging bag, the packaging bag can be cut, and the joint cutting tool bit moves towards the interior of the tool groove by a small distance after cutting is finished; and then, the joint cutting tool bit moves upwards and resets, at the moment, no protrusion exists on the surface of the base plate, meanwhile, packaging bag chippings generated by cutting can penetrate through the tool groove and fall into a recycling box on the lower portion, the safety of the whole joint cutting device is improved, and meanwhile joint cutting of the packaging bag is more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic packaging bag processing, in particular to a bag cutting and sewing device. Background Art

[0002] Bag cutting and sewing refers to the process of cutting and sewing bags, which is usually carried out during the production of bags to ensure the integrity and tightness of the bags.

[0003] During the actual use of the bag cutting and sewing device, when the bag raw material belt is conveyed into the device for cutting and sewing, the bag raw material belt is likely to shift on the conveying roller assembly inside the device, resulting in the bag being in an inclined state when entering the device, which affects the cutting and sewing processing operation of the bag. Based on these problems, Chinese Patent CN220594234U discloses a bag cutting and sewing device convenient for conveying. By setting an installation frame, conveying rollers, screw sleeves, screw rods, a second servo motor, limiting rings and connecting rings, during the use of the cutting and sewing device, according to the width of the bag for cutting and sewing, the second servo motor can be controlled to start, driving the screw rod to rotate. While the screw rod rotates, it can drive the screw sleeves threadedly connected to both ends outside the screw rod to move inward or outward simultaneously on the outside of the screw rod, and at the same time, it can drive the two groups of connecting rings and limiting rings to move inward or outward simultaneously on the outside of the conveying rollers. After adjusting the distance between the limiting rings to fit the width of the bag, when the bag is conveyed into the device at the top of the conveying rollers, the two sets of limiting rings provided can assist in guiding and limiting the two ends of the bag during conveying, reducing the offset during bag conveying and facilitating the limiting conveying of the bag raw material bag.

[0004] After the cutting tool head in the cutting and sewing device successfully cuts the bag below, the cutting tool head will continue to move downward a short distance. At this time, when the cutting tool head touches the soft pad, it will cause scratches on the surface of the soft pad. Many protrusions will appear on the scratched surface of the soft pad, which will not only cause friction with the bottom surface of the bag, but also cause the surface of the bag to be uneven, thus affecting the uniformity of cutting and sewing. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A packaging bag slitting device, including a bottom shell, a middle frame is fixedly connected to the top of the bottom shell, a top shell is fixedly connected to the top of the middle frame, a recycling box is sleeved on the inner wall of the bottom shell, the top ends of both sides of the inner wall of the middle frame penetrate through a first sliding plate, the bottom ends of both sides of the inner wall of the middle frame penetrate through a second sliding plate, a backing plate is welded to the outer wall of one side of the first sliding plate and the second sliding plate, a knife groove penetrating up and down is provided in each backing plate, and a slitting cutter head is installed directly above the knife groove.

[0008] As a further description of the above technical solution:

[0009] A first sleeve vertically penetrates through the first sliding plate, a second sleeve vertically penetrates through the second sliding plate, a first square rod is slidably connected to the inner wall of each first sleeve, a pressing plate is welded to the top of each first square rod, a return spring is sleeved on the outer wall of the bottom end of each first square rod, a second square rod is welded to the bottom of each first square rod, the outer wall of each second square rod is slidably connected to the inner wall of the second sleeve, and an L-shaped frame is fixedly connected to the bottom end of each second square rod.

[0010] As a further description of the above technical solution:

[0011] A cylinder vertically penetrates through the center of the top of the top shell, a sliding frame is fixedly connected to the movable end of the cylinder, and a forward and reverse motor penetrates through one side of the inner wall of the sliding frame.

[0012] As a further description of the above technical solution:

[0013] A bidirectional threaded rod is rotatably connected to the movable end of the forward and reverse motor, threaded sleeves are threadedly driven on both ends of the outer wall of the bidirectional threaded rod, a first slider is fixedly connected to the outer wall of each threaded sleeve, and the outer wall of each first slider is slidably connected to both ends of the inner wall of the sliding frame.

[0014] As a further description of the above technical solution:

[0015] A sliding rod is welded to the bottom of each first slider, the bottom of the sliding rod is fixedly connected to the top of the slitting cutter head, a support rod is welded to the opposite side of each sliding rod, and a second slider is welded to the opposite side of each support rod.

[0016] As a further description of the above technical solution:

[0017] A side plate is welded to the outer wall of the other side of the first sliding plate and the second sliding plate, a first chute is provided in each side plate, and the outer wall of each second slider is slidably connected to the inner wall of the first chute.

[0018] As a further description of the above technical solution:

[0019] Second chutes are provided on both sides of the inner wall of the top shell, and one end of the outer wall of the support rod is slidably connected to the inner wall of the second chute.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] (1) First, adjust the distance between the two groups of backing plates, then fix both ends of the packaging bag on the first slide plate respectively. Subsequently, when the air cylinder is started, the slitting cutter head will quickly move downward. When it touches the packaging bag, the packaging bag can be cut. After the cutting is completed, the slitting cutter head will move a short distance into the cutter groove, and then the slitting cutter head will move upward and reset. At this time, there will be no protrusions on the surface of the backing plate, and at the same time, the packaging bag debris generated by cutting will pass through the cutter groove and fall into the recycling bin below, which not only improves the safety of the entire slitting device, but also makes the slitting of the packaging bag more uniform.

[0022] (2) When the forward and reverse motor is started, it can drive the bidirectional threaded rod to rotate. At this time, the first slider and the threaded sleeve on the inner wall can move back and forth at both ends of the outer wall of the rotating bidirectional threaded rod. At the same time, the slitting cutter head on the sliding rod at the bottom of the first slider will also move back and forth accordingly. It should be noted that the first slider can only move in opposite directions or in relative directions, and at the same time, the slitting cutter heads can also only move in opposite directions or in relative directions. This structure can adjust the slitting distance of the packaging bag. By setting the connection structure between the support rod, the second slider and the first chute, when the sliding rod and the slitting cutter head move in opposite directions or in relative directions, the side plate will also move in opposite directions or in relative directions accordingly. At this time, the distance between the two groups of backing plates will change and the moving distance is the same as the moving distance of the slitting cutter head. Therefore, the position of the cutting cutter head is always directly above the cutter groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional view of the present utility model;

[0024] Figure 2 is a front view of the present utility model;

[0025] Figure 3 is a front cross-sectional view of the present utility model;

[0026] Figure 4 is the present utility model Figure 3 partial enlarged view of area A in;

[0027] Figure 5 is the present utility model Figure 3 partial enlarged view of area B in;

[0028] Figure 6 is the present utility model Figure 3 partial enlarged view of area C in.

[0029] The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0030] 1. Bottom shell; 2. Middle frame; 3. Top shell; 4. Recycling bin; 5. First slide plate; 6. Second slide plate; 7. Backing plate; 8. Knife groove; 9. First sleeve; 10. Second sleeve; 11. First square rod; 12. Pressure plate; 13. Return spring; 14. Second square rod; 15. L-shaped frame; 16. Side plate; 17. First chute; 18. Cylinder; 19. Slide frame; 20. Forward and reverse motor; 21. Bidirectional threaded rod; 22. Threaded sleeve; 23. First slider; 24. Slide rod; 25. Slitting cutter head; 26. Support rod; 27. Second slider; 28. Second chute. Detailed implementation manners

[0031] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model will be given in conjunction with the accompanying drawings of the specification.

[0032] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0033] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. The present utility model provides the following embodiments.

[0034] Referring to Figures 1-6 , an embodiment provided by the present utility model: A packaging bag slitting device, including a bottom shell 1, a middle frame 2 is fixedly connected to the top of the bottom shell 1, a top shell 3 is fixedly connected to the top of the middle frame 2, the bottom shell 1 and the top shell 3 have the same size, a recycling bin 4 is sleeved on the inner wall of the bottom shell 1. By setting the recycling bin 4, the debris generated by slitting the packaging bag can be recycled. The top ends of both sides of the inner wall of the middle frame 2 are penetrated by a first slide plate 5, and the bottom ends of both sides of the inner wall of the middle frame 2 are penetrated by a second slide plate 6. The first slide plate 5 and the second slide plate 6 have the same size. A backing plate 7 is welded to the outer wall of one side of the first slide plate 5 and the second slide plate 6. Knife grooves 8 penetrating up and down are provided in the backing plates 7. The top surfaces of the first slide plate 5 and the backing plate 7 are on the same horizontal plane. The top surfaces of the first slide plate 5 and the backing plate 7 can place the packaging bags to be slit.

[0035] A first sleeve 9 vertically penetrates through a first sliding plate 5, and a second sleeve 10 vertically penetrates through a second sliding plate 6. First square rods 11 are slidably connected to the inner walls of the first sleeve 9. Pressing plates 12 are welded to the tops of the first square rods 11. Return springs 13 are sleeved on the outer walls of the bottoms of the first square rods 11. Under the action of the return springs 13, the first square rods 11 can press the pressing plates 12 against the top surface of the first sliding plate 5. Second square rods 14 are welded to the bottoms of the first square rods 11. The outer walls of the second square rods 14 are slidably connected to the inner walls of the second sleeves 10. L-shaped frames 15 are fixedly connected to the bottoms of the second square rods 14. When a staff member lifts the L-shaped frames 15 upward, the first square rods 11 at the tops of the second square rods 14 will slide upward. At this time, the pressing plates 12 will move away from the first sliding plate 5. Both ends of the packaging bag are placed below the pressing plates 12. The L-shaped frames 15 are released. At this time, the return springs 13 will drive the pressing plates 12 at the tops of the first square rods 11 to quickly reset. The pressing plates 12 will tightly press on the packaging bag to fix the packaging bag.

[0036] Side plates 16 are welded to the outer walls of the other sides of the first sliding plate 5 and the second sliding plate 6. The side plates 16 have the same height and their top surfaces are on the same horizontal plane. First sliding grooves 17 are formed in the side plates 16. A cylinder 18 vertically penetrates through the center of the top of the top shell 3. A sliding frame 19 is fixedly connected to the movable end of the cylinder 18. A forward and reverse motor 20 penetrates through one side of the inner wall of the sliding frame 19. A bidirectional threaded rod 21 is rotatably connected to the movable end of the forward and reverse motor 20. Threaded sleeves 22 are threadedly driven on both ends of the outer wall of the bidirectional threaded rod 21. First sliders 23 are fixedly connected to the outer walls of the threaded sleeves 22. The outer walls of the first sliders 23 are slidably connected to both ends of the inner wall of the sliding frame 19. Slide rods 24 are welded to the bottoms of the first sliders 23. Cutting blade heads 25 are fixedly connected to the bottoms of the slide rods 24. The cutting blade heads 25 are all arranged directly above the knife grooves 8. When the forward and reverse motor 20 is turned on, it can drive the bidirectional threaded rod 21 to rotate. At this time, the first sliders 23 and the threaded sleeves 22 on the inner walls can move back and forth at both ends of the rotating bidirectional threaded rod 21. At the same time, the cutting blade heads 25 on the slide rods 24 at the bottoms of the first sliders 23 will also move back and forth accordingly. It should be noted that the first sliders 23 can only move in opposite directions or in relative directions, and at the same time, the cutting blade heads 25 can also only move in opposite directions or in relative directions. This structure can adjust the cutting distance of the packaging bag.

[0037] Support rods 26 are welded to opposite sides of the sliding rod 24. Second sliders 27 are welded to opposite sides of the support rods 26. The outer walls of the second sliders 27 are slidably connected to the inner walls of the first sliding grooves 17. By providing the connection structure among the support rods 26, the second sliders 27 and the first sliding grooves 17, when the sliding rod 24 and the cutting seam cutter head 25 move in opposite directions or move relative to each other, the side plate 16 will also move in opposite directions or move relative to each other accordingly. At this time, the distance between the two groups of backing plates 7 will change and the moving distance is the same as the moving distance of the cutting seam cutter head 25. Second sliding grooves 28 are formed on both sides of the inner wall of the top shell 3. One ends of the outer walls of the support rods 26 are slidably connected to the inner walls of the second sliding grooves 28.

[0038] The above content further elaborates on the present utility model in combination with specific embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present utility model.

Claims

1. A packaging bag cutting device, comprising a bottom shell (1), characterized in that: The top of the bottom shell (1) is fixedly connected to the middle frame (2), the top of the middle frame (2) is fixedly connected to the top shell (3), the inner wall of the bottom shell (1) is sleeved with a recovery box (4), the top ends of both sides of the inner wall of the middle frame (2) are penetrated by first slide plates (5), the bottom ends of both sides of the inner wall of the middle frame (2) are penetrated by second slide plates (6), the outer walls of one side of the first slide plate (5) and the second slide plate (6) are welded with backing plates (7), the backing plates (7) are provided with knife grooves (8) penetrating from top to bottom, and a slitting knife head (25) is installed directly above the knife grooves (8).

2. A packaging bag cutting device according to claim 1, characterized in that: A first sleeve (9) vertically penetrates the first slide plate (5), a second sleeve (10) vertically penetrates the second slide plate (6), the inner wall of the first sleeve (9) is slidably connected to a first square rod (11), a pressure plate (12) is welded to the top of the first square rod (11), a return spring (13) is sleeved on the bottom end of the outer wall of the first square rod (11), a second square rod (14) is welded to the bottom of the first square rod (11), the outer wall of the second square rod (14) is slidably connected to the inner wall of the second sleeve (10), and the bottom end of the second square rod (14) is fixedly connected to an L-shaped frame (15).

3. A packaging bag cutting device according to claim 1, characterized in that: A cylinder (18) vertically penetrates the center of the top of the top shell (3); a sliding frame (19) is fixedly connected to the movable end of the cylinder (18); and a forward and reverse motor (20) penetrates one side of the inner wall of the sliding frame (19).

4. A packaging bag cutting device according to claim 3, characterized in that: The movable end of the forward and reverse motor (20) is rotatably connected to a bidirectional threaded rod (21), both ends of the outer wall of the bidirectional threaded rod (21) are threadedly connected to a threaded sleeve (22), the outer wall of the threaded sleeve (22) is fixedly connected to a first sliding block (23), and the outer wall of the first sliding block (23) is slidably connected to both ends of the inner wall of the sliding frame (19).

5. A packaging bag cutting device according to claim 4, characterized in that: A slide bar (24) is welded to the bottom of each of the first slide blocks (23), and the bottom of each of the slide bars (24) is fixedly connected to the top of the slitting cutter head (25). A support bar (26) is welded to the opposite side of each of the slide bars (24), and a second slide block (27) is welded to the opposite side of each of the support bars (26).

6. A packaging bag cutting device according to claim 5, characterized in that: A side plate (16) is welded to the outer wall of the other side of the first slide plate (5) and the second slide plate (6), a first slide groove (17) is provided in each of the side plates (16), and the outer wall of the second slide block (27) is slidably connected to the inner wall of the first slide groove (17).

7. A packaging bag cutting device according to claim 6, characterized in that: Second sliding grooves (28) are provided on both sides of the inner wall of the top shell (3), and one end of the outer wall of the support rod (26) is slidably connected to the inner wall of the second sliding groove (28).

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