Pre-opening bag making machine

Abstract

This application discloses a pre-opening bag-making machine, relating to the field of bag-making machine technology. The application includes a bag-making machine body, on which a transition plate for plastic roll material is mounted. A sliding frame is vertically slidably mounted on the machine body, and a cutting component for forming a serrated seam is mounted on the sliding frame. A cutting seat is slidably mounted on the machine body, and a cutting wheel is rotatably mounted on the cutting seat. The cutting wheel is located above the transition plate and below the sliding frame. This application uses the cutting wheel to leave scratches on the top of a PELD transparent strip packaging bag. The suction component then draws the bag from the top side, causing the PELD transparent strip packaging bag to open as the sliding frame moves. This eliminates the need for workers to manually knead and pinch the opening of the PELD transparent strip packaging bag, facilitating subsequent packaging of custom bolts, improving work efficiency, and reducing the workload of workers.

Description

Technical Field

[0001] This application relates to the field of bag making machine technology, specifically to a pre-opening bag making machine. Background Technology

[0002] A bag-making machine is a machine used to produce various plastic packaging bags or other material packaging bags. Its processing range includes packaging bags of various sizes, thicknesses and specifications made of plastic or other materials. Generally speaking, plastic packaging bags are the main product.

[0003] PELD transparent strip bags are generally used for storing and packaging small parts, such as plastic buckles, custom bolts, mechanical parts, and electronic components, and therefore have a wide range of applications.

[0004] In the process of processing PELD transparent strip packaging bags using a bag-making machine, PELD plastic rolls are passed through a hot-melt device on the bag-making machine in conjunction with the machine's blades to form continuous strip-shaped PELD transparent strip packaging bags. When it is necessary to pack parts inside the PELD transparent strip packaging bags, the joint between two adjacent packaging bags is first pinched open to form an opening, the parts are placed into the packaging bag through the opening, and then the bag is sealed. Throughout this process, it is inconvenient for workers to put the parts into the packaging bag again, as the open end of the PELD transparent strip packaging bag needs to be repeatedly pinched and kneaded open. Therefore, this invention provides a pre-opening bag-making machine to solve the shortcomings of the existing method. Summary of the Invention

[0005] The purpose of this application is to provide a pre-opening bag making machine in order to solve the problems mentioned in the background above.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A pre-opening bag-making machine includes a machine body with a transition plate for passing through a plastic roll. A sliding frame is vertically slidably mounted on the machine body, and a cutting component for forming a serrated seam is mounted on the sliding frame. A cutting seat is slidably mounted on the machine body, and a cutting wheel is rotatably mounted on the cutting seat. The cutting wheel is located above the transition plate and below the sliding frame. A linkage component is installed between the cutting seat and the sliding frame. When the cutting seat moves unidirectionally through the sliding frame, the linkage component causes the sliding frame to move vertically downward and then reset. A drive component acting on the cutting seat is mounted on the machine body. After the cutting seat passes through the sliding frame and the cutting wheel cuts the plastic roll, the drive component causes the cutting seat to slide horizontally back to its original position. An air suction component is mounted on the sliding frame.

[0008] Furthermore, the linkage component includes a sliding block horizontally slidably mounted on the bag-making machine body, a hinge rod hinged between the sliding block and the sliding frame, a first return spring installed between the sliding frame and the bag-making machine body, a damping plate mounted on the bag-making machine body that fits against one side of the sliding block, an opening at the bottom of the sliding block and a through slot horizontally extending through one end, a drive plate vertically rotatably mounted on the cutting seat, a mounting cylinder horizontally constructed inside the sliding block, a wedge block horizontally slidably mounted inside the mounting cylinder, an elastic sheet installed between the wedge block and the mounting cylinder, and an elastic element acting on the drive plate mounted on the cutting seat. When the drive plate contacts the inclined surface of the wedge block, causing the sliding block to move, the sliding frame moves downward through the hinge rod. When the drive plate contacts one side of the wedge block, the drive plate rotates through the elastic element, with the inclined surface of the wedge block facing the damping plate.

[0009] Furthermore, the elastic element includes a slide plate that is vertically slidably mounted on the cutting seat, a second return spring is installed between the slide plate and the cutting seat, a linkage rod is installed between the drive plate and the slide plate, the bottom of the drive plate has a rounded corner design on one side away from the linkage rod, the rotation point of the drive plate is concentric with its rounded corner, and the bottom end of the drive plate is in contact with the top of the cutting seat.

[0010] Furthermore, the drive assembly includes two sets of symmetrically mounted wheel mechanisms on the bag-making machine body. The sliding frame is located between the two wheel mechanisms. Each wheel mechanism includes two rotating disks rotatably mounted on the bag-making machine body. A connecting shaft is installed between the two rotating disks. A torsion spring is fitted on one of the connecting shafts. One end of the torsion spring is connected to the connecting shaft, and the other end of the torsion spring is connected to the bag-making machine body. A steel wire rope is wound on the rotating disk. The free ends of the steel wire ropes of the two wheel mechanisms are connected to each other to form two parallel guide sections. The cutting seat is fitted on the two guide sections. A drive unit that drives one of the connecting shafts to rotate intermittently is installed on the bag-making machine body.

[0011] Furthermore, the drive unit includes a connecting gear mounted on one of the connecting shafts, a sector gear meshing with the connecting gear is mounted on the bag making machine body, and a drive motor for driving the sector gear to rotate is mounted on the bag making machine body.

[0012] Furthermore, the cutting assembly includes a plurality of connecting cylinders horizontally arrayed on the sliding frame, with slidable blades vertically slidably mounted at the bottom ends of the plurality of connecting cylinders. The bottom ends of the slidable blades are triangular, and the plurality of slidable blades form serrated blades. A third return spring is installed between the slidable blades and the connecting cylinders.

[0013] Furthermore, the sliding frame has an internal air inlet chamber, and the air suction assembly includes a suction pump installed on the body of the bag making machine. The suction end of the suction pump is connected to a suction pipe, and the free end of the suction pipe is connected to the sliding frame and communicates with the air inlet chamber. A ventilation port communicating with the air inlet chamber is provided at the bottom of the air inlet chamber.

[0014] Furthermore, the transition plate is arc-shaped, with one side of the transition plate being an arc surface that contacts the plastic roll. The transition plate is smoothly connected to the body of the bag-making machine. The bottom surface of the sliding frame is an arc-shaped concave surface. The bottom ends of multiple cutting blades pass through the sliding frame and are located below the arc-shaped concave surface. The ventilation opening is located on the arc-shaped concave surface.

[0015] Furthermore, two pressure rollers are symmetrically and rollingly mounted on the body of the bag making machine, and the sliding frame is located between the two pressure rollers.

[0016] Furthermore, the elastic sheet is Z-shaped, and two guide slopes are symmetrically formed on one side of the groove.

[0017] The beneficial effects of this application are as follows:

[0018] 1. This application uses a cutting wheel to leave scratches on the top of the PELD transparent strip packaging bag. The suction component then adsorbs the upper side of the PELD transparent strip packaging bag, thereby opening the PELD transparent strip packaging bag as the sliding frame moves. This eliminates the need for workers to knead and pinch the opening of the PELD transparent strip packaging bag themselves, making it easier for workers to package the customized bolts, improving work efficiency and reducing the workload of workers.

[0019] 2. The steel wire rope of this application is designed with a certain degree of toughness, which allows the cutting wheel to have a certain vertical floating distance, so that the cutting wheel can move smoothly onto the PELD transparent strip packaging bag and leave scratches without directly cutting the PELD transparent strip packaging bag.

[0020] 3. The arc-shaped design of the transition plate in this application allows the multiple cutting blades to contact the upper part of the PELD transparent strip packaging bag after piercing the bag, thus improving the adsorption effect and preventing the opening from being torn open due to insufficient suction. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of this application;

[0022] Figure 2 This application Figure 1Partial three-dimensional sectional view;

[0023] Figure 3 This application Figure 1 3D half-section diagram;

[0024] Figure 4 This application Figure 1 Another three-dimensional half-section diagram;

[0025] Figure 5 This application Figure 1 Enlarged view of the structure at point A in the middle;

[0026] Figure 6 This application Figure 2 Enlarged view of the structure at point B in the middle;

[0027] Figure 7 This application Figure 4 Enlarged view of the structure at point D;

[0028] Figure 8 This application Figure 3 Enlarged view of the structure at point C;

[0029] Reference numerals: 1. Bag making machine body; 2. Transition plate; 3. Sliding frame; 301. Air inlet cavity; 302. Ventilation port; 4. Cutting assembly; 401. Connecting cylinder; 402. Cutting blade; 403. Third return spring; 5. Cutting seat; 6. Cutting wheel; 7. Linkage assembly; 701. Sliding block; 702. Through slot; 703. Drive plate; 704. Mounting cylinder; 705. Wedge block; 706. First return spring; 707. Damping plate; 708. Elastic sheet; 8. Drive assembly ; 801, Rotating wheel mechanism; 802, Rotating disk; 803, Connecting shaft; 804, Torsion spring; 805, Steel wire rope; 806, Guide section; 9, Elastic element; 901, Slide plate; 902, Second return spring; 903, Linkage rod; 10, Hinge rod; 11, Suction assembly; 1101, Suction pump; 1102, Suction pipe; 12, Pressure roller; 13, Guide slope; 14, Drive unit; 1401, Connecting gear; 1402, Sector gear; 1403, Drive motor. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0031] like Figures 1-8As shown, this application proposes a pre-opening bag making machine, including a bag making machine body 1, a transition plate 2 for plastic roll material to pass through, a sliding frame 3 vertically slidably mounted on the bag making machine body 1, a cutting component 4 for forming a serrated seam mounted on the sliding frame 3, a cutting seat 5 slidably mounted on the bag making machine body 1, a cutting wheel 6 rotatably mounted on the cutting seat 5, the cutting wheel 6 being located above the transition plate 2 and below the sliding frame 3, a linkage component 7 being installed between the cutting seat 5 and the sliding frame 3, when the cutting seat 5 moves unidirectionally through the sliding frame 3, the linkage component 7 causes the sliding frame 3 to move vertically downward and then reset, a driving component 8 acting on the cutting seat 5 is installed on the bag making machine body 1, after the cutting seat 5 passes through the sliding frame 3 and the cutting wheel 6 enters the plastic roll material, the driving component 8 causes the cutting seat 5 to slide horizontally and reset, and an air suction component 11 is installed on the sliding frame 3;

[0032] In use, first install the plastic roll onto the bag-making machine body 1, then pass the free end of the plastic roll through the top of the transition plate 2. After processing, the two layers of the plastic roll are stacked together on the bag-making machine body 1. When the plastic roll moves above the transition plate 2, as... Figure 1As shown, when the cutting seat 5 is located to the left of the sliding frame 3, the driving component 8 will cause the cutting seat 5 to move to the right. When the cutting seat 5 moves, the cutting wheel 6 will slide onto the plastic roll. The cutting wheel 6 will slide onto the plastic roll. Because the plastic roll is two layers above the transition plate 2, the upper plastic roll will have a heavier sliding mark. After the cutting wheel 6 passes through the sliding frame 3, the linkage component 7 will cause the sliding frame 3 to move vertically. The cutting component 4 will then cut the plastic roll into a serrated seam. At this time, the suction component 11 will suck up the upper piece of the plastic roll and stick it to the bottom of the sliding frame 3. Then the sliding frame 3 will return to its original position through the linkage component 7 to pull the upper piece of the plastic roll until the suction is insufficient and the upper piece of the plastic roll detaches from the suction component 11. This will make the opening of the PELD transparent strip packaging bag formed by the plastic roll open. Then the bag making machine body 1 will make the open PELD strip packaging bag open. The D transparent strip packaging bag moves, causing another PELD transparent strip packaging bag without an opening to move onto the transition plate 2. At this time, the cutting seat 5 is located to the right of the sliding frame 3. Then, the drive component 8 will cause the cutting seat 5 to move to the left to reset. When the cutting seat 5 moves to the left, it will scratch the top piece of the plastic roll again. The cutting seat 5 will not contact the sliding frame 3 during the leftward movement. At this time, the sliding frame 3 moves downward due to the linkage component 7 and cooperates with the cutting component 4, making it easy to pull open the top of the PELD transparent strip packaging bag (because the scratches were left beforehand, making it easy for the suction component 11 to absorb and pull open). Then, during the upward reset process of the sliding frame 3, the suction component 11 will absorb the top side of the PELD transparent strip packaging bag, thereby opening the PELD transparent strip packaging bag. This eliminates the need for the staff to knead and pinch the opening of the PELD transparent strip packaging bag to open it themselves, making it easier for the staff to package the parts, improving work efficiency and reducing the workload of the staff.

[0033] It should be noted that after the plastic roll passes through the bag making machine body 1, it has already formed a series of sealed chambers (the plastic roll hot-melt process forms a PELD transparent strip packaging bag without an opening).

[0034] like Figure 1 , Figure 6 and Figure 7As shown, in some embodiments, the linkage component 7 includes a sliding block 701 horizontally slidably mounted on the bag-making machine body 1. A hinge rod 10 is hinged between the sliding block 701 and the sliding frame 3. A first return spring 706 is installed between the sliding frame 3 and the bag-making machine body 1. A damping plate 707 that fits against one side of the sliding block 701 is installed on the bag-making machine body 1. The bottom of the sliding block 701 is open and a through groove 702 is horizontally opened at one end. A drive plate 703 is vertically rotatably mounted on the cutting seat 5. An installation cylinder 704 is horizontally constructed inside the sliding block 701. A wedge block 705 is horizontally slidably mounted inside the installation cylinder 704. An elastic sheet 708 is installed between the wedge block 705 and the installation cylinder 704. An elastic sheet 708 acting on the drive plate is installed on the cutting seat 5. The elastic element 9 of 703, when the drive plate 703 contacts the inclined surface of the wedge block 705, causing the sliding block 701 to move, causes the sliding frame 3 to move downward through the hinge rod 10. When the drive plate 703 contacts one side plane of the wedge block 705, the elastic element 9 causes the drive plate 703 to rotate, and the inclined surface of the wedge block 705 faces the damping plate 707. When the cutting seat 5 moves to the right through the drive assembly 8, that is, moves away from the sliding frame 3, the drive plate 703 on the cutting seat 5 will enter the through groove 702 and contact the inclined surface of the wedge block 705, thereby forcing the sliding block 701 to move to the right through the drive plate 703. The movement of the sliding block 701 to the right drives the hinge rod 10 to move, because one end of the hinge rod 10 is hinged to the sliding frame 3. The sliding block 701 moves to the right, causing the sliding frame 3 to move downwards via the hinge rod 10. This allows the cutting component 4 on the sliding frame 3 to cut the PELD transparent strip packaging bag. At this time, the cutting component 4 is in contact with the PELD transparent strip packaging bag, and the first return spring 706 is in a stretched state. As the cutting seat 5 continues to move to the right, because the driving plate 703 is in contact with the inclined surface of the wedge block 705, the wedge block 705 will move into the corresponding mounting cylinder 704 until the driving plate 703 disengages from the inclined surface of the wedge block 705 and passes through the sliding block 701. The driving plate 703 is no longer in contact with the wedge block 705, so the wedge block 705 will extend out of the mounting cylinder 704 due to the reset of the elastic sheet 708. The elastic deformation of the first reset spring 706 causes the sliding frame 3 to move upward. The upward movement of the sliding frame 3, through the hinge rod 10, causes the sliding block 701 to move to the left until the sliding block 701 contacts the damping plate 707 to achieve reset. At this time, the cutting seat 5 will be reset due to the leftward movement of the drive assembly 8, causing the drive plate 703 to contact one side plane of the wedge block 705 during the leftward reset process. After contacting the wedge block 705, the drive plate 703 will rotate, causing the drive plate 703 to rotate to the bottom of the wedge block 705 and pass through the drive plate 703. Then, due to the elastic element 9, the drive plate 703 rotates back to the vertical state, thereby completing the single scratch treatment on the top of the PELD transparent strip packaging bag.

[0035] like Figure 6 and Figure 7 As shown, in some embodiments, the elastic element 9 includes a slide plate 901 vertically slidably mounted on the cutting seat 5. A second return spring 902 is installed between the slide plate 901 and the cutting seat 5. A linkage rod 903 is installed between the drive plate 703 and the slide plate 901. The bottom of the drive plate 703 has a rounded corner design on one side away from the linkage rod 903. The rotation point of the drive plate 703 is concentric with its rounded corner. The bottom end of the drive plate 703 is in contact with the top of the cutting seat 5. When the drive plate 703 contacts the inclined surface of the wedge block 705, the bottom of the drive plate 703 abuts against the top of the cutting seat 5, thereby keeping the drive plate 703 vertical. When the drive plate 703 moves, it abuts against the wedge block 705. When one side of block 705 contacts the plane, the drive plate 703 rotates around its hinge point, causing the linkage rod 903 to move. Since one end of the linkage rod 903 is hinged to the slide plate 901, the movement of the drive plate 703 via the hinge rod 10 causes the slide plate 901 to move, which in turn pulls the second return spring 902. When the drive plate 703 disengages from the wedge block 705, the second return spring 902 returns to its original position due to its elastic deformation, forcing the slide plate 901 to move. The movement of the slide plate 901 via the hinge rod 10 causes the drive plate 703 to rotate until one end of the drive plate 703 abuts against the top of the cutting seat 5 (e.g., Figure 7 As shown in the figure, this keeps the drive board 703 vertical.

[0036] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the drive assembly 8 includes two sets of symmetrically mounted wheel mechanisms 801 on the bag-making machine body 1. A sliding frame 3 is located between the two wheel mechanisms 801. Each wheel mechanism 801 includes two rotating disks 802 rotatably mounted on the bag-making machine body 1. A connecting shaft 803 is installed between the two rotating disks 802. A torsion spring 804 is fitted onto one of the connecting shafts 803. One end of the torsion spring 804 is connected to the connecting shaft 803, and the other end is connected to the bag-making machine body 1. A steel wire rope 805 is wound around the rotating disk 802. The free ends of the steel wire ropes 805 of the two wheel mechanisms 801 are connected to each other to form two parallel guide sections 806. A cutting seat 5 is fitted onto the two guide sections 806. A drive unit 14 is installed on the bag-making machine body 1 to drive one of the connecting shafts 803 to rotate intermittently. Figure 1As shown, the steel wire ropes 805 on the four rectangularly distributed rotating disks 802 are connected in pairs, giving each steel wire rope 805 two horizontal and parallel guide sections 806. When the drive unit 14 drives one of the connecting shafts 803 to rotate, the steel wire rope 805 moves. Because the cutting seat 5 is fitted onto the guide section 806, the cutting seat 5 moves (the guide section 806 refers to the horizontal part of the steel wire rope 805). At this time, the cutting edge of the cutting wheel 6 is tangent to the transition plate 2. When the cutting wheel 6 moves, it will scratch the PELD transparent long strip packaging bag located on the transition plate 2. Because the PELD transparent long strip packaging bag is divided into upper and lower pieces, scratches will appear on the upper part of the PELD transparent long strip packaging bag. The steel wire rope 805 is designed with a certain degree of toughness, making... The cutting wheel 6 has a certain vertical floating distance, allowing it to smoothly move onto the PELD transparent strip packaging bag, leaving scratches without directly cutting it. The cutting wheel 6 is rotatably mounted on the cutting seat 5. It should be noted that the scratches left by the cutting wheel 6 will open the upper piece of the PELD transparent strip packaging bag but will not cut the lower piece. The connecting shaft 803, due to the drive unit 14, causes the connecting seat to rotate intermittently, that is, it rotates once every certain period of time. This results in the torsion spring 804 being in a compressed state after the cutting seat 5 moves from left to right. When the cutting seat 5 disengages from the wedge block 705 and continues to move a certain distance, the connecting shaft 803 stops rotating, causing the torsion spring 804 to reset due to its own elastic deformation, thereby causing the cutting seat 5 to move to the left and reset.

[0037] like Figure 1 As shown, in some embodiments, the drive unit 14 includes a connecting gear 1401 mounted on one of the connecting shafts 803. A sector gear 1402 meshing with the connecting gear 1401 is mounted on the bag making machine body 1. A drive motor 1403 driving the sector gear 1402 to rotate is mounted on the bag making machine body 1. The output shaft of the drive motor 1403 is connected to the sector gear 1402. That is, when the drive motor 1403 rotates, it will cause the sector gear 1402 to rotate. Because the sector gear 1402 meshes with the connecting gear 1401, the connecting gear 1401 will rotate during the process of the sector gear 1402 meshing with the connecting gear 1401, causing the connecting shaft 803 to rotate. When the sector gear 1402 continues to rotate and does not mesh with the connecting gear 1401, the connecting gear 1401 will rotate due to the elastic reset of the torsion spring 804.

[0038] like Figure 8As shown, in some embodiments, the cutting assembly 4 includes a plurality of connecting cylinders 401 horizontally arrayed on the sliding frame 3. Cutting blades 402 are vertically slidably mounted at the bottom ends of the connecting cylinders 401. The bottom ends of the cutting blades 402 are triangular, and the plurality of cutting blades 402 form serrated blades. A third return spring 403 is installed between the cutting blades 402 and the connecting cylinders 401. When the sliding frame 3 moves downward, the plurality of cutting blades 402 move downward, causing the bottom tips of the cutting blades 402 to penetrate the PELD transparent material. On the long strip packaging bag, multiple slitting blades 402 pierce through the upper and lower pieces of the PELD transparent long strip packaging bag. As the sliding frame 3 moves downward, the slitting blades 402 move downward and compress the third return spring 403. The third return spring 403 ensures that multiple slitting blades 402 can pierce into the PELD transparent long strip packaging bag during the downward movement of the sliding frame 3, preventing the bottom tips of the slitting blades 402 from not being on the same horizontal line, which would cause some of the slitting blade tips to not pierce into the PELD transparent long strip packaging bag.

[0039] like Figure 1 , Figure 3 and Figure 8 As shown, in some embodiments, the sliding frame 3 has an internal air inlet chamber 301. The suction assembly 11 includes a suction pump 1101 installed on the bag making machine body 1. The suction end of the suction pump 1101 is connected to a suction pipe 1102. The free end of the suction pipe 1102 is connected to the sliding frame 3 and communicates with the air inlet chamber 301. The bottom of the air inlet chamber 301 is provided with a ventilation port 302 that communicates with the air inlet chamber 301. That is, when the suction pump 1101 is started, it will cause the suction pipe 1102 to produce suction, thereby causing the ventilation port 302 to produce suction, thereby achieving the adsorption of the upper piece of the PELD transparent strip packaging bag to open the opening. It should be noted that the PELD transparent strip packaging bag will be held by multiple holding rollers 12 during the production of the paper bag machine, so that the PELD transparent strip packaging bag will not be directly sucked out from the bag making machine body 1.

[0040] like Figure 5 and Figure 8As shown, in some embodiments, the transition plate 2 is outwardly arc-shaped, with one side of the transition plate 2 being an outwardly arc surface that contacts the plastic roll. The transition plate 2 is smoothly connected to the bag-making machine body 1. The bottom surface of the sliding frame 3 is an arc-shaped concave surface. The bottom ends of multiple cutting blades 402 all pass through the sliding frame 3 and are located below the arc-shaped concave surface. The ventilation opening 302 is opened on the arc-shaped concave surface. The outwardly arc-shaped design of the transition plate 2 ensures that when the bottom of the sliding frame 3 is in contact with the top of the transition plate 2, the multiple cutting blades 402, after piercing the PELD transparent strip packaging bag, will... The contact between the long strip packaging bag and the upper sheet improves the adsorption effect and prevents the PELD transparent long strip packaging bag from failing to be adsorbed due to insufficient suction and thus failing to tear open the opening. When the cutting wheel 6 passes through the transition plate 2, the cutting wheel 6 will first contact one side of the outer arc surface of the transition plate 2. As the cutting seat 5 continues to move, the cutting wheel 6 moves towards the highest point of the outer arc surface of the transition plate 2, causing the cutting wheel 6 to move upward, making the scratch in the middle of the PELD transparent long strip packaging bag the deepest, and making it easier to pull open the PELD transparent long strip packaging bag when the vent 302 adsorbs the upper sheet.

[0041] like Figure 1 and Figure 8 As shown, in some embodiments, two pressure rollers 12 are symmetrically rolled on the body 1 of the bag making machine, and the sliding frame 3 is located between the two pressure rollers 12. The design of the pressure rollers 12 ensures that when the vent 302 generates suction, it will not directly adsorb the two layers of plastic roll material.

[0042] like Figure 6 As shown, in some embodiments, the elastic sheet 708 is Z-shaped, and two guide ramps 13 are symmetrically provided on one side of the slot 702. Compared with a spring, the Z-shaped elastic sheet 708 has better strength, and the design of the guide ramps 13 allows the drive plate 703 to enter the slot 702 better.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pre-opening bag-making machine, characterized in that, The bag making machine includes a bag making machine body (1), on which a transition plate (2) for plastic rolls to pass through is installed. A sliding frame (3) is vertically slidably installed on the bag making machine body (1). A cutting component (4) for forming a serrated seam is installed on the sliding frame (3). A cutting seat (5) is slidably installed on the bag making machine body (1). A cutting wheel (6) is rotatably installed on the cutting seat (5). The cutting wheel (6) is located above the transition plate (2) and below the sliding frame (3). Between the cutting seat (5) and the sliding frame (3) A linkage component (7) is installed. When the cutting seat (5) moves unidirectionally through the sliding frame (3), the linkage component (7) causes the sliding frame (3) to move vertically downward and then reset. A drive component (8) acting on the cutting seat (5) is installed on the body (1) of the bag making machine. The drive component (8) causes the cutting seat (5) to pass through the sliding frame (3). After the cutting wheel (6) cuts the plastic roll, the drive component (8) causes the cutting seat (5) to slide horizontally and reset. An air suction component (11) is installed on the sliding frame (3). The linkage component (7) includes a sliding block (701) horizontally slidably mounted on the bag making machine body (1). A hinge rod (10) is hinged between the sliding block (701) and the sliding frame (3). A first return spring (706) is installed between the sliding frame (3) and the bag making machine body (1). A damping plate (707) that fits against one side of the sliding block (701) is installed on the bag making machine body (1). The bottom of the sliding block (701) is open and a through groove (702) is horizontally opened at one end. A drive plate (703) is vertically rotatably mounted on the cutting seat (5). An installation cylinder (704) is horizontally constructed inside the sliding block (701). (704) A wedge block (705) is horizontally slidably installed inside. An elastic sheet (708) is installed between the wedge block (705) and the mounting cylinder (704). An elastic element (9) acting on the drive plate (703) is installed on the cutting seat (5). When the drive plate (703) contacts the inclined surface of the wedge block (705) and causes the sliding block (701) to move, the sliding frame (3) is moved downward through the hinge rod (10). When the drive plate (703) contacts one side plane of the wedge block (705), the drive plate (703) is rotated through the elastic element (9). The inclined surface of the wedge block (705) faces the damping plate (707). The elastic element (9) includes a slide plate (901) that is vertically slidably mounted on the cutting seat (5). A second return spring (902) is installed between the slide plate (901) and the cutting seat (5). A linkage rod (903) is installed between the drive plate (703) and the slide plate (901). The bottom of the drive plate (703) is rounded off one side away from the linkage rod (903). The rotation point of the drive plate (703) is concentric with its rounded corner. The bottom end of the drive plate (703) is in contact with the top of the cutting seat (5). The drive assembly (8) includes two sets of symmetrically mounted rotary wheel mechanisms (801) on the bag making machine body (1). The sliding frame (3) is located between the two rotary wheel mechanisms (801). Each rotary wheel mechanism (801) includes two rotating disks (802) rotatably mounted on the bag making machine body (1). A connecting shaft (803) is installed between the two rotating disks (802). A torsion spring (804) is fitted on one of the connecting shafts (803). One end of the torsion spring (804) is connected to the connecting shaft (803). 803) is connected, the other end of the torsion spring (804) is connected to the body of the bag making machine (1), a steel wire rope (805) is wound on the rotating disk (802), the free ends of the steel wire ropes (805) of the two rotating wheel mechanisms (801) are connected to each other to form two parallel guide sections (806), the cutting seat (5) is fitted on the two guide sections (806), and a drive unit (14) is installed on the body of the bag making machine (1) to drive one of the connecting shafts (803) to rotate intermittently.

2. The pre-opening bag-making machine according to claim 1, characterized in that, The drive unit (14) includes a connecting gear (1401) mounted on one of the connecting shafts (803), a sector gear (1402) meshing with the connecting gear (1401) is mounted on the bag making machine body (1), and a drive motor (1403) for driving the sector gear (1402) to rotate is mounted on the bag making machine body (1).

3. The pre-opening bag-making machine according to claim 1, characterized in that, The cutting assembly (4) includes a plurality of connecting cylinders (401) mounted horizontally in an array on the sliding frame (3). Cutting blades (402) are vertically slidably mounted on the bottom ends of the plurality of connecting cylinders (401). The bottom ends of the cutting blades (402) are triangular. The plurality of cutting blades (402) form serrated blades. A third return spring (403) is installed between the cutting blades (402) and the connecting cylinders (401).

4. The pre-opening bag-making machine according to claim 3, characterized in that, The sliding frame (3) has an internal air inlet chamber (301). The air suction assembly (11) includes a suction pump (1101) installed on the body (1) of the bag making machine. The suction end of the suction pump (1101) is connected to a suction pipe (1102). The free end of the suction pipe (1102) is connected to the sliding frame (3) and communicates with the air inlet chamber (301). The bottom of the air inlet chamber (301) is provided with a ventilation port (302) communicating with the air inlet chamber (301).

5. The pre-opening bag-making machine according to claim 4, characterized in that, The transition plate (2) is arc-shaped, one side of the transition plate (2) is an arc surface, the arc surface is in contact with the plastic roll, the transition plate (2) is smoothly connected to the bag making machine body (1), the bottom surface of the sliding frame (3) is an arc concave surface, the bottom ends of the multiple cutting blades (402) all pass through the sliding frame (3) and are located below the arc concave surface, and the ventilation port (302) is opened on the arc concave surface.

6. The pre-opening bag-making machine according to claim 1, characterized in that, Two pressure rollers (12) are symmetrically rolled on the body (1) of the bag making machine, and the sliding frame (3) is located between the two pressure rollers (12).

7. The pre-opening bag-making machine according to claim 2, characterized in that, The elastic sheet (708) is Z-shaped, and two guide slopes (13) are symmetrically opened on one side of the through groove (702).

Images