Bag making machine capable of automatically correcting deviation

Abstract

The utility model relates to a bag making machine, and provides the bag making machine capable of automatically rectifying deviation, which comprises a base, a control table, a working table, a mounting plate, an unwinding roller and the like, the control table is arranged on the front side of the right portion of the base, the workbench is fixedly arranged on the upper portion of the base, the mounting plates are arranged on the front side and the rear side of the right portion of the base, the unwinding rollers are rotationally arranged on the right portions of the mounting plates, and the two unwinding rollers are symmetrically arranged. According to the utility model, the position sensor is arranged at the uncoiling and flattening stage of the bag-making film material, the position of the fed film material is monitored in real time, and the conveyed film material is rectified in time through the movement of the sliding table according to the position of the conveyed film material, so that not only are the accuracy and the stability of film material conveying improved, but also the deviation and the waste of the film material are reduced, and the production efficiency is improved. And the production efficiency and the product quality are remarkably improved, and the frequency and the labor intensity of manual intervention are reduced.

Description

Technical Field

[0001] This utility model relates to a bag making machine, and more particularly to a bag making machine with automatic deviation correction. Background Technology

[0002] With the rapid development of the packaging industry, automated bag-making machines are widely used in the production of various plastic bags, paper bags and other packaging materials due to their high efficiency and precision.

[0003] Bag-making machines primarily utilize mechanical structures to unwind and convey materials, heat seal, and cut. The machine first unwinds the roll material and conveys it to the working area via feeding rollers. The film material wound on the master roll is typically single-layer or double-layered. After the unwinding mechanism divides or separates the bag-making material into two single layers, the internal roller group flattens the separated single-layer material and transfers it to the subsequent workstation. During this stage, it is crucial to ensure that the two single-layer materials are completely flattened and advance at a constant speed and tension, synchronously and smoothly fed into the subsequent heat-sealing stage. In this area, the two single-layer films are aligned and adhered together. A sealing component heat-seals the areas of the film that need sealing. The smoothness and accuracy of this process are critical to the quality of the final product. Finally, a slitting mechanism precisely divides the sealed bag into individual units. Existing bag-making machines are prone to material misalignment during material feeding due to mechanical vibration, tension changes, and other factors. This misalignment of the two film layers affects subsequent cutting and sealing processes, resulting in inconsistent bag sizes and even defective products. To correct the material misalignment, operators often need to stop the machine frequently for manual adjustments, which not only increases the labor intensity of operators but also significantly reduces production efficiency.

[0004] To solve the above problems, it is particularly necessary to develop a bag-making machine that can automatically correct deviations. Utility Model Content

[0005] To overcome the shortcomings of existing bag-making machines, which are prone to material deviation during material conveying due to mechanical vibration and tension changes, and which affect subsequent cutting and sealing processes, resulting in inconsistent bag sizes or even defective products, operators typically need to frequently stop the machine for manual adjustment to correct the deviation. This not only increases the labor intensity of operators but also significantly reduces production efficiency. The goal is to provide an automatic deviation-correcting bag-making machine to solve the above problems.

[0006] An automatic deviation-correcting bag-making machine includes a base, a control console, a worktable, a mounting plate, unwinding rollers, film transfer roller 1, film transfer roller 2, position sensors, brackets, guide rails, slides, film feeding roller 1, film feeding roller 2, an electric cylinder, a film pressing component, a heat sealing component, a cutting machine, a cutter, and a film transfer roller assembly. A control console is located on the front right side of the base. A worktable is fixedly mounted on the upper part of the base. Mounting plates are located on both the front and rear right sides of the base. Unwinding rollers are rotatably mounted on the right side of each mounting plate, with two unwinding rollers arranged symmetrically. Two film transfer roller 1s are rotatably mounted on the right side of the mounting plates near the unwinding rollers, and two film transfer roller 2s are rotatably mounted on the left side of the mounting plates. A bracket is located on the left side of each mounting plate, and a position sensor is mounted on each bracket. The detection end of the position sensor faces vertically downwards. Guide rails are symmetrically arranged vertically within the area between film transfer roller 1 and film transfer roller 2 on the mounting plate. Slides are slidably mounted on each guide rail, and film feeding roller 1 and film feeding roller 2 are located on the left and right sides of each slide. Tension adjustment mechanisms are provided in the area between film feeding roller 1 and film feeding roller 2 on the slide. Electric cylinders are provided on the upper and lower sides of the front mounting plate. The drive rods of the two electric cylinders on the upper and lower sides are respectively connected to one side of the slide on the upper and lower sides. The electric cylinders drive the slide to slide back and forth on the guide rail. A film pressing component is provided on the right side of the worktable, and multiple heat sealing components are arranged on the left side of the worktable. The heat sealing component consists of an upper film pressing die and a lower film platform. A heating block is provided in the upper film pressing die. Under the drive of the power component, the upper film pressing die continuously performs up and down reciprocating motion and intermittently contacts the lower film pressing die. Multiple film transfer roller groups are spaced apart on the upper part of the worktable. The film transfer roller group consists of two film rollers arranged vertically. One of the film rollers is connected to the power component. One side of the surface of the two film rollers is in contact with each other. The film material passes between the two film rollers and is transferred to the left through the film transfer roller group. A cutting machine is installed on the right side of the upper part of the worktable. The cutting blade in the cutting machine faces downward and moves up and down reciprocally in the cutting machine.

[0007] Furthermore, it is particularly preferred that the tension adjustment mechanism includes a turntable, a tension roller, a rocker arm, and a hydraulic cylinder. Turntables are rotatably mounted on both the front and rear sides of the area between film feeding roller one and film feeding roller two on the slide. The turntables are disc-shaped, and a tension roller is rotatably mounted between the two turntables. The tension roller is positioned on an eccentric side of the turntable. Rotating the turntable causes the tension roller to swing. A tension sensor is mounted on the tension roller. A rocker arm is mounted on the outward-facing side of each turntable. Hydraulic cylinders are installed on both the front and rear sides of the slide. The mounting base of the hydraulic cylinder is hinged to the slide. One end of the hydraulic rod of the hydraulic cylinder is hinged to one end of the rocker arm on the same side. The hydraulic cylinder drives the rocker arm to rotate by an angle, thereby driving the turntable to rotate and realizing the position change of the tension roller.

[0008] Furthermore, it is particularly preferred that the worktable also includes a fixed seat, a pad, a spring, a pressure table, a connecting seat, and pressure blocks. Two fixed seats are installed on the right side of the worktable near the die-forming part. A pad is installed between the fixed seats through an elastic element. The pad slides up and down between the fixed seats. A spring is provided on the upper part of each fixed seat. A pressure table is provided between the upper parts of the springs. Multiple pressure blocks are arranged on the lower part of the pressure table. A connecting seat is provided at the front of the pressure table. The connecting seat is used to connect to a power component. The power component drives the pressure table to move up and down reciprocally, so that the pressure blocks and the pad are in intermittent contact. The rhythm of the reciprocating movement of the pressure table is consistent with the rhythm of the movement of the die on the heat-sealing part. The two move synchronously and in the same manner.

[0009] In addition, it is particularly preferred that the mounting base also includes a sliding frame, which is provided on the mounting base. The sliding frame consists of two sliding rods and a pressure plate.

[0010] Furthermore, it is particularly preferred that the cutting edge of the cutter is beveled.

[0011] In addition, it is particularly preferred that the workbench also includes a receiving platform, which is located at the left end of the workbench and has a receiving bin inside.

[0012] Furthermore, it is particularly preferred that the device also includes a swing arm, a pressure roller, and a second spring. The right side of the front mounting plate is rotatably provided with a swing arm near the unwinding roller. The front part of the swing arm is wrapped with a second spring. The two ends of the second spring are connected to the mounting plate and the swing arm, respectively. The second spring is a torsion spring. The end of the swing arm is rotatably provided with a pressure roller. When the swing arm is not subjected to external force, the pressure roller will remain close to the unwinding roller under the action of the second spring.

[0013] The beneficial effects of this utility model are as follows: By setting a position sensor in the unwinding and flattening stage of the bag-making film material, this utility model monitors the position of the fed film material in real time, and corrects the deviation of the transmitted film material in a timely manner by moving the slide table according to the position of the transmitted film material. This not only improves the accuracy and stability of film material transmission and reduces film material deviation and waste, but also significantly improves production efficiency and product quality, and reduces the frequency of manual intervention and labor intensity.

[0014] This invention uses a pre-pressing mechanism to pre-press the films to ensure that their edges are more tightly bonded, thus guaranteeing the sealing and firmness of the subsequent heat-sealing process. This effectively avoids processing errors caused by loose edges and improves the product qualification rate.

[0015] This invention incorporates a pressing mechanism that uses pressure rollers to press the mother roll during the unwinding stage, assisting in unwinding, preventing the mother roll from becoming loose, increasing the friction between the mother roll and the unwinding roller, and reducing slippage during unwinding. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the unwinding mechanism of this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the slide table and its components of this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the present invention with the unwinding mechanism concealed.

[0020] Figure 5 This is a three-dimensional structural diagram of the pre-compression mechanism of this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the components of this utility model, including the film pressing part, the cutting machine, and the receiving platform.

[0022] Figure 7 This is a plan view of the cutter of this utility model.

[0023] Figure 8 This is a three-dimensional structural diagram of the pressing mechanism of this utility model.

[0024] The labels in the diagram are as follows: 1_Base, 2_Control console, 21_Workbench, 3_Mounting plate, 4_Unwind roller, 41_Transfer roller 1, 42_Transfer roller 2, 43_Position sensor, 431_Bracket, 5_Guide rail, 51_Slide table, 52_Transfer roller 1, 53_Transfer roller 2, 54_Electric cylinder, 6_Turntable, 61_Tension roller, 62_Swing arm, 63_Hydraulic cylinder, 7_Film pressing component, 71_Heat sealing component, 72_Cuter, 720_Blade edge, 721_Cut knife, 73_Receiving platform, 74_Transfer roller group, 730_Receiving bin, 8_Fixed seat, 81_Padded platform, 811_Spring 1, 812_Pressure table, 813_Sliding frame, 814_Connecting seat, 82_Pressure block, 9_Swing arm, 91_Pressure roller, 92_Spring 2. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0026] Example 1: An automatic deviation correction bag making machine, such as Figure 1-8As shown, a control console 2 is located on the front right side of the base 1. The control console 2 is mainly used for operating and monitoring the operating status of the entire equipment. The control console is equipped with various buttons, a display screen, and indicator lights. Operators can use these buttons to start or stop the equipment and adjust its operating parameters, such as temperature, speed, and pressure. A workbench 21 is fixedly mounted on the upper part of the base 1. Mounting plates 3 are located on both the front and rear right sides of the base 1. Unwinding rollers 4 are rotatably mounted on the right side of each mounting plate 3, with two unwinding rollers 4 arranged symmetrically. Two film transfer rollers 41 are rotatably mounted on the right side of the mounting plates 3 near the unwinding rollers 4. Two film transfer rollers 42 are rotatably mounted on the left side of the mounting plates 3. Supports 431 are located on the left side of each mounting plate 3. Position sensors 43 are installed on the mounting plate 3, with the detection end of the position sensors 43 facing vertically downwards. Guide rails 5 are symmetrically arranged vertically within the area between the first film transfer roller 41 and the second film transfer roller 42 on the mounting plate 3. Sliding tables 51 are mounted on the guide rails 5. First film transfer roller 52 and second film transfer roller 53 are located on the left and right sides of the sliding table 51. Tension adjustment mechanisms are installed within the area between the first film transfer roller 52 and the second film transfer roller 53 on the sliding table 51. Electric cylinders 54 are installed on both the upper and lower sides of the front mounting plate 3. The drive rods of the two electric cylinders 54 on the upper and lower sides are respectively connected to one side of the upper and lower sliding tables 51, and the movement is controlled by electric... Cylinder 54 drives slide table 51 to slide back and forth on guide rail 5 for precise positioning. Cylinder 54 is connected to position sensor 43. Based on feedback from position sensor 43, cylinder 54 can adjust the position of slide table in a timely manner, thereby adjusting the position of the film material being transported on it. A film pressing component 7 is located on the right side of worktable 21, and multiple heat sealing components 71 are arranged on the left side of worktable 21. Each heat sealing component 71 consists of an upper film pressing die and a lower film pressing platform. A heating block is installed inside the upper film pressing die. Driven by the power component, the upper film pressing die continuously reciprocates up and down, intermittently contacting the lower film pressing die. Through the cooperation of the two... The two layers of film are bonded together in a preset state. Multiple film transfer roller groups 74 are spaced apart on the upper part of the worktable 21. Each film transfer roller group 74 consists of two film rollers arranged vertically. One of the film rollers is connected to a power component. One side of the surface of the two film rollers is in contact with each other. The film material passes between the two film rollers and is transferred to the left through the film transfer roller group 74. A cutting machine 72 is installed on the upper right side of the worktable 21. The cutting blade 721 inside the cutting machine 72 has its blade edge 720 facing downward and moves up and down reciprocally inside the cutting machine 72. The bag is cut by the cutting blade 721 inside the cutting machine 72.

[0027] The film material wound on the master roll placed on the unwinding roller 4 of this utility model is double-layered. During the unwinding stage, after pulling out one end of the double-layered film material, the two layers of film material pass between the two transfer rollers 41. Then, the double-layered film material is separated, so that the two single-layered film materials contact the upper and lower transfer rollers 41 respectively, and continue to pass around the outer side of the feed rollers 53 and 52 on the upper and lower slide tables 51. Then, the film material passes through the inner side of the transfer roller 42 and is simultaneously fed into the pressing component 7. In the pressing component 7, the two layers of film material will stick together to form a tight structure. The film material continues to pass between the upper and lower molds of the transfer roller group 74 and the heat sealing component 71, and one end is led to the cutting machine 72 to complete the film material layout. During this process, the position sensor 43 monitors the position of the film material in real time. Once the film material is detected to be deviated, the electric cylinder 54 will quickly adjust. The position of the slide table 51 ensures that the film material is always kept on the correct path, guaranteeing processing accuracy. The film transfer roller group 74 and the pressing power component of the upper die on the heat-sealing unit 71 work alternately; that is, the film transfer roller group 74 only performs fixed-length conveying when the upper die is lifted. This ensures the flatness and consistency of the film material during the heat-sealing process. Finally, the film is cut by the cutter 721 at the cutting machine 72 to form a complete bag. The entire process is highly automated, greatly improving production efficiency and product quality. The cutting edge 720 of the cutter 721 is beveled. This design produces a smoother, neater cut when cutting the film material, reducing tearing and burrs at the film edges, improving cutting quality and accuracy. The beveled cutting edge also reduces cutting resistance, making the cutting process smoother and extending the service life of the cutter 721. A receiving platform 73 is installed at the left end of the worktable 21 to receive and temporarily store the cut film material. The design of the receiving platform 73 allows the cut film material to be smoothly transferred from the cutting machine 72 to the receiving platform 73, avoiding the problem of the film material falling or piling up during the transfer process. The receiving bin 730 is located inside the receiving platform 73 and is used to hold the cut film material. The receiving bin 730 is designed with a moderate capacity to ensure that the cut film material can be stored in an orderly manner during continuous production, which is convenient for subsequent collection and processing.

[0028] like Figure 1-3As shown, the tension adjustment mechanism includes a turntable 6, a tension roller 61, a swing arm 62, and a hydraulic cylinder 63. Turntables 6 are rotatably mounted on both sides of the area between film feeding roller 1 52 and film feeding roller 2 53 on the slide table 51. The turntables 6 are disc-shaped. A tension roller 61 is rotatably mounted between the two turntables 6, positioned on an eccentric side of the turntable 6. When the turntable 6 is rotated, the tension roller 61 swings accordingly, thereby changing the tension of the film material. A tension sensor is installed on the tension roller 61 to monitor the tension of the film material in real time, ensuring that the tension is always at the optimal state. A swing arm 62 is mounted on the outward-facing side of each turntable 6. Hydraulic cylinders 63 are mounted on both sides of the slide table 51. The mounting base of the hydraulic cylinder 63 is hinged to the slide table 51, and one end of the hydraulic rod of the hydraulic cylinder 63 is hinged to one end of the swing arm 62 on the same side. The hydraulic cylinder 63 drives the swing arm 62 to rotate, thereby rotating the turntable 6 and changing the position of the tension roller 61.

[0029] As the film material passes between the first feeding roller 52 and the second feeding roller 53, the tension sensor monitors the tension of the film material in real time. If the detected tension is too high or too low, the control system issues a command to drive the hydraulic cylinder 63. The hydraulic rod of the hydraulic cylinder 63 extends and retracts, causing the swing arm 62 to rotate, which in turn causes the turntable 6 to rotate. Since the tension roller 61 is installed at an eccentric position on the turntable 6, the rotation of the turntable 6 causes the position of the tension roller 61 to change, thereby adjusting the tension of the film material. For example, when it is necessary to increase the tension, the hydraulic cylinder 63 pushes the swing arm 62, causing the turntable 6 to rotate clockwise, and the tension roller 61 swings upward to increase the tension of the film material. Conversely, when it is necessary to decrease the tension, the hydraulic cylinder 63 pulls the swing arm 62, causing the turntable 6 to rotate counterclockwise, and the tension roller 61 swings downward to decrease the tension of the film material. This process ensures that the film material maintains a stable tension throughout the entire transmission process, avoiding problems such as film material breakage or loosening caused by uneven tension, thereby improving the production efficiency and product quality of the bag making machine.

[0030] Example 2: Based on Example 1, such as Figure 1 , Figure 4 and Figure 5As shown, a pre-compression mechanism is also provided, which includes a fixed seat 8, a pad 81, a spring 811, a pressure table 812, a connecting seat 814, and a pressure block 82. Two fixed seats 8 are installed on the right side of the worktable 21 near the film pressing component 7, which support and fix the entire pre-compression mechanism. The pad 81 is connected between the fixed seats 8 by an elastic element, allowing the pad 81 to slide up and down between the fixed seats 8. A spring 811 is installed on the upper part of each fixed seat 8, and a pressure table 812 is installed between the upper parts of the springs 811. The function of the springs 811 is to provide cushioning when the pressure table 812 descends and to provide rebound force when the pressure table 812 rises, ensuring that the contact between the pressure block 82 and the pad 81 is intermittent, avoiding continuous pressure from damaging the film material. Multiple pressure blocks 82 are arranged below the pressure table 812. The front part is provided with a connecting seat 814, which is used to connect the power component. The power component drives the pressure table 812 to move up and down reciprocally, so that the pressure block 82 and the pad 81 are in intermittent contact. The rhythm of the reciprocating movement of the pressure table 812 is consistent with the rhythm of the movement of the pressure mold on the heat sealing part 71. The two move synchronously and in the same manner. This utility model uses a pre-pressing mechanism to pre-press the film materials that are in contact, so that the edges of the two are further pressed together, which provides a guarantee for the sealing and firmness in the subsequent heat sealing process. It effectively avoids the problem of processing errors caused by loose edges and improves the product qualification rate. Each fixed seat 8 is provided with a sliding frame 813. The sliding frame 813 is composed of two sliding rods and a pressure plate. A double-layer wiping cloth is fixed between the sliding frames 813. When the film material is introduced, the surface of the film material is wiped by the wiping cloth while pre-pressing.

[0031] After the film material passes through the first film feeding roller 52 and the second film feeding roller 53, it enters the pressing component 7. Inside the pressing component 7, the two layers of film material adhere to each other. Next, the film material enters the pre-pressing mechanism. The pressing table 812 of the pre-pressing mechanism is driven by a power component connected to the connecting seat 814, moving up and down reciprocally. When the pressing table 812 moves downwards, the pressing block 82 contacts the pad 81, pre-pressing the film material to ensure a tighter fit at the edges. Simultaneously, the double-layer wiping cloth between the sliding frames 813 slides on the surface of the film material, wiping away dust and impurities. After pre-pressing, the film material continues to advance, entering between the transfer roller group 74 and the heat sealing component 71. Driven by the power component, the upper die of the heat sealing component 71 intermittently contacts the lower die, heat-sealing the film material. Because the pre-pressing mechanism has ensured a tight fit at the edges of the film material, the heat sealing process is smoother, and the sealing performance and durability are significantly improved.

[0032] In addition, such as Figure 1 and Figure 8As shown, it also includes a swing arm 9, a pressure roller 91, and a second spring 92. The right side of the mounting plate 3 on the front side is rotatably provided with a swing arm 9 near the unwinding roller 4. The front part of the swing arm 9 is wrapped with a second spring 92. The two ends of the second spring 92 are connected to the mounting plate 3 and the swing arm 9 respectively. The second spring 92 is a torsion spring. The end of the swing arm 9 is rotatably provided with a pressure roller 91. By rotating the swing arm 9, the pressure roller 91 will swing in an arc path. When the swing arm 9 is not subjected to external force, under the action of the second spring 92, the pressure roller 91 will maintain a state close to the unwinding roller 4. That is to say, when a film roll is fixed on the unwinding roller 4, the pressure roller 91 will contact the roll.

[0033] In actual processing, when the master roll begins to unwind, the pressure roller 91, under the tension of the spring 92, tightly adheres to the master roll on the unwinding roller 4. As the master roll continues to unwind, the pressure roller 91 continuously provides stable pressing force under the action of the torsion spring, ensuring that the master roll does not loosen or slip during unwinding, thus guaranteeing smooth unwinding. The pressing mechanism not only improves the stability and reliability of unwinding but also reduces film damage and production failures caused by unstable unwinding, significantly improving production efficiency and product quality.

[0034] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. An automatic deviation correction bag making machine, comprising a base (1), a control console (2) and a workbench (21), the right front side of the base (1) is provided with the control console (2), and the upper part of the base (1) is fixedly provided with the workbench (21); characterized in that, Also include the mounting plate (3), pay-off roll (4), film transfer roller one (41), film transfer roller two (42), position sensor (43), bracket (431), guide rail (5), sliding table (51), film feeding roller one (52), film feeding roller two (53), electric cylinder (54), film pressing piece (7), heat sealing element (71), cutting machine (72), cutter (721) and film transfer roller group (74), the base (1) right part front and back sides are equipped with mounting plate (3), the mounting plate (3) right part is rotatably equipped with pay-off roll (4), two pay-off rolls (4) are symmetrically arranged, the mounting plate (3) right part between the side close to pay-off roll (4) rotatably is equipped with two film transfer roller one (41), the mounting plate (3) left part between rotatably is equipped with two film transfer roller two (42), the mounting plate (3) left part is equipped with bracket (431), the bracket (431) is equipped with position sensor (43), the detection end of position sensor (43) is vertically downward, the area between film transfer roller one (41) and film transfer roller two (42) on the mounting plate (3) is symmetrically equipped with guide rail (5) up and down, the guide rail (5) is slidably equipped with sliding table (51), the sliding table (51) is equipped with film feeding roller one (52) and film feeding roller two (53) left and right sides, the area between film feeding roller one (52) and film feeding roller two (53) on the sliding table (51) is equipped with tension adjusting mechanism, the mounting plate (3) on the front side is equipped with electric cylinder (54) up and down, the drive rod of two electric cylinders (54) on the upper and lower sides is connected with one side of the sliding table (51) on the upper and lower sides, the sliding table (51) is driven by electric cylinder (54) to slide on the guide rail (5) front and back, the right part of workbench (21) is equipped with film pressing piece (7), the left part of workbench (21) is equipped with a plurality of heat sealing element (71), heat sealing element (71) is composed of upper pressing film and lower film table, heating block is arranged in the upper pressing mold, the upper pressing mold is driven by power element, and continuously reciprocates up and down, and intermittently contacts with the lower pressing mold, a plurality of film transfer roller groups (74) are arranged at intervals on the upper part of workbench (21), the film transfer roller group (74) is composed of two film rollers arranged up and down, one of the two film rollers is connected with power element, the surfaces of the two film rollers are in contact with each other, the film material passes between the two film rollers, and the film material is transmitted to the left through the film transfer roller group (74), the cutting machine (72) is installed on the right side of the upper part of workbench (21), the cutter (721) blade (720) in the cutting machine (72) faces downward, and the cutter (721) reciprocates up and down in the cutting machine (72).

2. A bag making machine with automatic correction of deviation according to claim 1, characterized in that, The tension adjusting mechanism comprises a rotating disc (6), a tension roller (61), a swing lever (62) and a hydraulic cylinder (63), the area between the film feeding roller one (52) and the film feeding roller two (53) on the sliding table (51) is provided with the rotating disc (6) on both sides in a rotating mode, the rotating disc (6) is disc-shaped, the tension roller (61) is rotatably arranged between the two rotating discs (6), the tension roller (61) is arranged on the eccentric side of the rotating disc (6), the tension roller (61) will swing when the rotating disc (6) is rotated, the tension sensor is arranged on the tension roller (61), the swing lever (62) is arranged on the outer side of the rotating disc (6), the hydraulic cylinder (63) is arranged on both sides of the sliding table (51), the mounting base of the hydraulic cylinder (63) is hinged to the sliding table (51), one end of the hydraulic rod of the hydraulic cylinder (63) is hinged to one end of the swing lever (62) on the same side, the rotating angle of the swing lever (62) is driven by the hydraulic cylinder (63), and then the rotating disc (6) is driven to rotate, so that the position of the tension roller (61) is changed.

3. A bag making machine with automatic correction of deviation according to claim 2, characterized in that, The fixed seat (8), the cushion table (81), the spring one (811), the pressing table (812), the connecting seat (814) and the pressing block (82) are further included, two fixed seats (8) are installed on the right side of the workbench (21) close to the film pressing element (7), the elastic element is arranged between the fixed seats (8), the cushion table (81) slides up and down between the fixed seats (8), the spring one (811) is arranged on the upper part of the fixed seat (8), the pressing table (812) is arranged between the upper parts of the spring one (811), a plurality of pressing blocks (82) are arranged on the lower part of the pressing table (812), the connecting seat (814) is arranged on the front part of the pressing table (812), the connecting seat (814) is used for connecting the power element, the pressing table (812) is driven to reciprocatingly move up and down by the power element, so that the pressing block (82) intermittently contacts the cushion table (81), the beat of the reciprocating movement of the pressing table (812) is consistent with the beat of the movement of the upper pressing die of the heat sealing element (71), the two are synchronous and consistent in action.

4. A bag making machine with automatic correction of deviation according to claim 3, characterized in that, The sliding frame (813) is further included, the sliding frame (813) is arranged on the fixed seat (8) and is composed of two sliding rods and a pressing plate.

5. A bag making machine with automatic correction of deviation according to claim 4, characterized in that, The cutting blade (720) of the cutting knife (721) is oblique.

6. A bag making machine with automatic correction of deviation according to claim 5, characterized in that, The receiving table (73) is further included, the receiving table (73) is arranged on the left end of the workbench (21), and the receiving bin (730) is formed in the receiving table (73).

7. A bag making machine with automatic correction of deviation according to claim 6, characterized in that, The swing arm (9), the pressing roller (91) and the spring two (92) are further included, the swing arm (9) is rotatably arranged on the right side of the mounting plate (3) close to the unwinding roller (4), the spring two (92) is arranged on the front part of the swing arm (9), the two ends of the spring two (92) are connected with the mounting plate (3) and the swing arm (9) respectively, the spring two (92) is a torsion spring, the pressing roller (91) is rotatably arranged on the tail end of the swing arm (9), when the swing arm (9) is not subjected to external force, the pressing roller (91) will maintain the state of being close to the unwinding roller (4) under the action of the spring two (92).

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