One-button knife adjustment bag making machine

Abstract

The present invention discloses a one-button knife-adjusting bag-making machine, the bag-making machine comprises a frame, a plurality of hot knife racks are sequentially mounted on the frame, each hot knife rack is provided with an upper hot knife mechanism and a lower hot knife mechanism, the upper hot knife seat is sequentially provided with a plurality of first cylinders with movable ends facing downwards, the movable ends of the first cylinders are fixedly connected to the upper hot knife; the lower hot knife mechanism comprises a lower hot knife seat fixedly connected to the hot knife rack, a plurality of second cylinders with movable ends facing upwards are sequentially arranged above the lower hot knife seat, the movable ends of the second cylinders are fixedly connected to the lower hot knife. The bag-making machine of the present invention is concise and ingenious, after the product production requirement information including the hot knife position arrangement requirement information and the hot pressing requirement parameter information including the hot pressing interval, the hot pressing holding time and the hot pressing pressure required for the production of bags of various materials and / or various models is pre-entered into the control system, when a certain bag needs to be produced, it can be directly selected with one button, with high production efficiency and high precision.

Description

Technical Field

[0001] The invention belongs to the field of packaging bag making machinery, and in particular relates to a one-button knife-adjusting bag making machine. Background Art

[0002] With the improvement of people's living standards, there are more and more types of products. Bag making machines are used to make various plastic packaging bags or other material packaging bags. The packaging bags to be processed are transported on the bag making machine, and a hot knife is needed to seal the edges. Due to the different sizes and specifications of different packaging bags, the hot knife needs to be positioned before sealing the edges of packaging bags of different specifications, so that the controller of the bag making machine can obtain the initial position parameters of the hot knife, and then set the position of the hot knife according to the parameters input to the controller; the existing hot knife alignment method of the bag making machine is mainly that the operator first resets each hot knife to zero, and then the controller sets the position of each hot knife according to the input size, so that the hot knife can move to the corresponding position. However, this knife alignment method has the following shortcomings: 1. The process of resetting each hot knife to zero is time-consuming and laborious, and the long-distance movement of the hot knife is not conducive to the line setting on the hot knife; 2. The position of each hot knife cannot be obtained in real time, which is not conducive to the staff to fine-tune the position of the hot knife. In today's packaging industry, efficient and accurate bag making machines are essential. In addition, traditional bag making machines often have deficiencies in pressure control, which leads to problems such as material deformation and loose sealing during the production process, and poor adjustment flexibility. When switching to different products to meet the diverse needs of customers, a tedious debugging process is required, which is time-consuming, labor-intensive, and material-intensive. In addition, downtime waste is also one of the common problems of bag making machines, because when the machine is stopped, the hot knife is easy to squeeze the material and over-press the material, resulting in waste of material due to squeezing and temperature. Therefore, downtime will not only affect production efficiency, but also increase costs. For this reason, people hope to find a bag making machine that is more convenient, fast, flexible, and accurate in adjusting the hot knife and controlling pressure. Summary of the invention

[0003] The object of the present invention is to provide a one-button knife-adjusting bag-making machine with fast and flexible adjustment and high adjustment accuracy.

[0004] The present invention is achieved through the following technical solutions: The one-button knife adjustment bag making machine is used for the self-adaptive positioning and adjustment of the hot knife of the transverse sealing hot knife on the bag making machine. The bag making machine comprises a frame 1, on which a plurality of hot knife racks 2 are sequentially mounted, each hot knife rack 2 is provided with an upper hot knife mechanism 3 and a lower hot knife mechanism 4 arranged up and down, the upper hot knife mechanism 3 comprises a driving shaft 3.1, a cam 3.2, a third cylinder 3.3 and an upper hot knife seat 3.4 which are sequentially connected, the driving shaft 3.1 is mounted on the upper part of the hot knife rack 2, and the driving shaft 3.1 is arranged on the hot knife rack 2. The first servo motor 3.5 of the upper part is driven to rotate, the cam 3.2 is fixedly connected to the driving shaft 3.1 to be driven to rotate by the driving shaft 3.1, the third cylinder 3.3 is driven by the cam 3.2 to move up and down, and thereby drives the upper hot knife seat 3.4 to move up and down, and the upper hot knife seat 3.4 is sequentially provided with a plurality of first cylinders 3.6 with movable ends facing downwards, and the movable ends of the first cylinders 3.6 are fixedly connected to the upper hot knife 3.7 arranged below the upper hot knife seat 3.4; The lower ironing knife mechanism 4 comprises a lower ironing knife seat 4.1 fixedly connected to the ironing knife frame 2, and a plurality of second cylinders 4.2 with movable ends facing upward are arranged in sequence above the lower ironing knife seat 4.1, and the movable ends of the second cylinders 4.2 are all fixedly connected to the lower ironing knife 4.3 arranged above the lower ironing knife seat 4.1; The ironing frame 2 is mounted on the frame 1 through a linear guide rail 6, and the second servo motor 5 is fixedly mounted on one side of the ironing frame 2. The second servo motor 5 drives the ironing frame 2 to move along the linear guide rail 6 through a gear rack transmission structure. Specifically, the second servo motor 5 is fixedly mounted on one side of the ironing frame through a support frame, and the motor shaft of the second servo motor 5 is fixedly connected to a gear 5.1. The frame 1 is also provided with a rack 5.2 that can match the gear. The motor shaft of the second servo motor 5 rotates, thereby driving the gear 5.1 to move along the rack 5.2 located below the gear, thereby achieving the ironing frame 2 to move forward and backward along the linear guide rail 6 relative to the frame 1; The bag-making machine is also provided with a control system, and each servo motor and each cylinder are communicatively connected to the control system so that the control system can obtain the position information of all hot knives and the downward pressure information of each hot knives, and control the rotation of each servo motor and the extension and pressure of each cylinder; the frame is also provided with a scale for positioning.

[0005] Preferably, both the first servo motor 3.5 and the second servo motor 5 are servo motors with brakes and absolute encoders.

[0006] Preferably, each ironing knife is also provided with an ironing position recognition device, which is a CCD visual recognition device or a GN photoelectric sensor. The ironing position recognition device is used as a reference to recognize and determine whether the ironing position is accurate. If there is an offset, the control system is notified to automatically adjust the position of the ironing knife so that it can iron accurately.

[0007] The present invention also discloses a control method for the bag making machine: The product production requirement information including the arrangement requirement information of the hot knife positions and the hot pressing requirement parameter information including the hot pressing interval, hot pressing holding time and hot pressing pressure required for the production of bags of various materials and / or various models is entered in the control system in advance. When a certain type of bag needs to be produced, it can be directly selected with one click, among which: (1) The cylinder control method is: When working, the movable end of the second cylinder 4.2 on the lower ironing knife seat 4.1 is always extended, and the movable end of the third cylinder 3.3 on the upper ironing knife mechanism 3 is also extended, and provides corresponding pressure according to the ironing pressure requirement; When the machine is stopped, the movable ends of the third cylinder 3.3 and the second cylinder 4.2 are retracted to avoid excessive hot pressing and causing burns to the material; The pressure in the first cylinder 3.6 is controlled by the control system. For different selected products, the control system adjusts the pressure in the first cylinder 3.6 according to the product production requirement information preset in the control system, so as to achieve the adjustment of the ironing pressure for different products; (2) The method for adjusting the ironing interval and the ironing holding time is: The first servo motor 3.5 is controlled by the control system. For different selected products, the control system drives the cam to rotate as required according to the product production requirement information preset in the control system through the electronic cam control principle. Among them, the first servo motor 3.5 drives the drive shaft, the drive shaft drives the cam to rotate, the cam drives the third cylinder to move up and down, and the third cylinder drives the upper hot knife seat to move up and down. That is, each hot knife is also provided with a mechanical cam, that is, the cam 3.2 on the upper hot knife mechanism 3. The control system controls the speed change of the mechanical cam when it rotates through the first servo motor through the pre-set electronic cam parameters, thereby realizing the on-demand control of the hot pressing interval and hot pressing holding time of the hot knife on the material.

[0008] (3) The position adjustment method of each ironing knife is as follows: the second servo motor 5 is controlled by the control system. For different selected products, the control system controls the rotation of the motor shaft of the second servo motor 5 according to the product production requirement information preset in the control system, thereby driving the gear fixed to the ironing knife frame 2 to rotate. Through the cooperation between the gear and the rack fixed on the frame, the ironing knife frame can move left and right along the guide rail set on the frame, thereby realizing the adjustment of the ironing knife frame.

[0009] Preferably, the calibration process of each ironing knife in step (2) before use is as follows: after the machine is installed, it is powered on for the first time, and the control system obtains the current absolute position of each second servo motor by reading the value of the absolute encoder of each second servo motor 5, and then calibrates each second servo motor once with the scale fixed on the frame by manually inputting data to move it, so that the absolute position of each ironing knife is known; without changing the mechanical connection, since the second servo motor has a brake characteristic, the control system can always know the actual position of each ironing knife; The adjustment process of each hot knife is as follows: manually adjust the reference axis to the required position, and then use the predetermined reference axis as a reference, according to the current actual position of the reference axis, and according to the production requirements of different products including bag making length and hot sealing requirements, set the relevant parameters in the control system. When a certain product needs to be produced, the control system automatically calculates the absolute position that each hot knife corresponding to the product needs to reach according to the preset parameters, and then directly controls each second servo motor 5 to automatically position to the corresponding position, thereby completing the adjustment of the subsequent hot knives.

[0010] More preferably, the position of the reference axis is the position of a cutter on a bag making machine or the position of a preset photoelectric detection head.

[0011] More preferably, when controlling the adjustment of the positions of the ironing knives, the calculation formula used in the control system is: A reference axis is preset on the frame. If the bag length is set to L, the position of the reference axis after positioning is a+Δa, where a is the standard position of the reference axis and Δa is the offset of the reference axis. Then, within the movable range: The first hot knife position b = (a + Δa) + (n + 1) L (where n = 0, 1, 2, 3, ...) The second hot knife position c = b + (n+1) L (where n = 0, 1, 2, 3, ...) Preferably, the scale is a grating scale system, and the feedback of the grating scale system can better ensure the absolute position of each servo motor and prevent errors.

[0012] Furthermore, the grating scale system includes a grating scale, a grating scale reader and a grating scale base. The grating scale reader is fixedly connected to each servo motor and is arranged corresponding to the position of the grating scale. It moves in a straight line parallel to the grating scale and reads the scale on the grating scale. The grating scale is mounted on the grating scale base, and the grating scale base is arranged on the frame.

[0013] More preferably, the grating scale system is arranged parallel to the guide rail.

[0014] The beneficial effects of the present invention are: The one-button knife adjustment bag making machine of the present invention is simple and ingenious. After the product production requirement information including the arrangement requirement information of the hot knife positions and the hot pressing requirement parameter information including the hot pressing interval, the hot pressing holding time and the hot pressing pressure required for the production of bags of various materials and / or various models is pre-entered in the control system, when a certain bag needs to be produced, it can be directly selected with one button, and the hot pressing parameters including the hot pressing interval, the hot pressing holding time and the hot pressing pressure can be adjusted with one button, which greatly reduces the difficulty and time of knife adjustment, and also greatly improves the adjustment efficiency of the hot knife and the accuracy and quality of bag making and hot sealing. It has high production efficiency and strong practicality, and has the following advantages in particular: (1) Through the design, the one-button pressure adjustment function can be easily realized, achieving precise control of the hot pressing pressure. Whether it is the production of a single material or a variety of composite materials, it can ensure that the pressure is just right, thereby ensuring the quality and stability of the product. This means that the operator can adjust the pressure according to different production needs with just a press of a button, greatly improving production efficiency and flexibility. Without the need for tedious debugging processes, different production modes can be quickly switched to meet the diverse needs of customers.

[0015] (2) When the production line is shut down, the cylinder will drive the hot knife to automatically separate, thus avoiding the squeezing of materials and the waste of materials affected by temperature. This not only saves time and materials, but also the equipment is equipped with a non-stop material receiving function, which can improve the stability and reliability of the production line.

[0016] (3) The present invention uses full servo hot pressing technology to selectively maintain a constant holding time to ensure that each seal can achieve the best effect. Moreover, each hot knife can be independently controlled, and the operator can adjust each hot knife individually according to different product specifications and requirements to achieve personalized production. This bag making machine based on a full servo control system not only performs well in pressure control, but also has many advantages such as high efficiency, precision, and stability. It can meet the needs of different industries for bag making and packaging, and provide customers with high-quality products and services. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0018] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0019] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0020] like Figure 1-2 As shown, a one-button knife adjustment bag making machine is used for the self-adaptive positioning and adjustment of the hot knife of the transverse sealing hot knife on the bag making machine. The bag making machine comprises a frame 1, on which a plurality of hot knife racks 2 are sequentially mounted, each hot knife rack 2 is provided with an upper hot knife mechanism 3 and a lower hot knife mechanism 4 arranged up and down, the upper hot knife mechanism 3 comprises a driving shaft 3.1, a cam 3.2, a third cylinder 3.3 and an upper hot knife seat 3.4 which are sequentially connected, the upper hot knife seat 3.4 is connected to the downward movable end of the third cylinder 3.3, the driving shaft 3.1 is mounted on the upper part of the hot knife rack 2, and the driving shaft 3.1 is passed through The first servo motor 3.5 arranged on the upper part of the hot knife holder 2 drives the hot knife holder 2 to rotate. The cam 3.2 is fixedly connected to the driving shaft 3.1 to be driven by the driving shaft 3.1 to rotate. The third cylinder 3.3 is driven by the cam 3.2 to move up and down, thereby driving the upper hot knife holder 3.4 to move up and down. The upper hot knife holder 3.4 is sequentially provided with a plurality of first cylinders 3.6 with movable ends facing downwards. The movable ends of the first cylinders 3.6 are fixedly connected to the upper hot knife 3.7 arranged below the upper hot knife holder 3.4. The lower ironing knife mechanism 4 comprises a lower ironing knife seat 4.1 fixedly connected to the ironing knife frame 2, and a plurality of second cylinders 4.2 with movable ends facing upward are arranged in sequence above the lower ironing knife seat 4.1, and the movable ends of the second cylinders 4.2 are all fixedly connected to the lower ironing knife 4.3 arranged above the lower ironing knife seat 4.1; The ironing frame 2 is mounted on the frame 1 through a linear guide rail 6, and the second servo motor 5 is fixedly mounted on one side of the ironing frame 2. The second servo motor 5 drives the ironing frame 2 to move along the linear guide rail 6 through a gear rack transmission structure. Specifically, the second servo motor 5 is fixedly mounted on one side of the ironing frame through a support frame, and the motor shaft of the second servo motor 5 is fixedly connected to a gear 5.1. The frame 1 is also provided with a rack 5.2 that can match the gear. The motor shaft of the second servo motor 5 rotates, thereby driving the gear 5.1 to move along the rack 5.2 located below the gear, thereby achieving the ironing frame 2 to move forward and backward along the linear guide rail 6 relative to the frame 1; The bag-making machine is also provided with a control system, and each servo motor and each cylinder are communicatively connected to the control system so that the control system can obtain the position information of all hot knives and the downward pressure information of each hot knives, and control the rotation of each servo motor and the extension and pressure of each cylinder; the frame is also provided with a scale for positioning.

[0021] The first servo motor 3 . 5 and the second servo motor 5 are both servo motors with a holding brake and an absolute encoder.

[0022] Each ironing knife is also provided with an ironing position recognition device, which is a CCD visual recognition device or a GN photoelectric sensor. The ironing position recognition device is used as a reference to recognize and determine whether the ironing position is accurate. If there is an offset, the control system is notified to automatically adjust the position of the ironing knife so that it can be ironed accurately.

[0023] Control method of the above bag making machine: The product production requirement information including the arrangement requirement information of the hot knife positions and the hot pressing requirement parameter information including the hot pressing interval, hot pressing holding time and hot pressing pressure required for the production of bags of various materials and / or various models is entered in the control system in advance. When a certain type of bag needs to be produced, it can be directly selected with one click, among which: (1) The cylinder control method is: When working, the movable end of the second cylinder 4.2 on the lower ironing knife seat 4.1 is always extended, and the movable end of the third cylinder 3.3 on the upper ironing knife mechanism 3 is also extended, and provides corresponding pressure according to the ironing pressure requirement; When the machine is stopped, the movable ends of the third cylinder 3.3 and the second cylinder 4.2 are retracted to avoid excessive hot pressing and causing burns to the material; The pressure in the first cylinder 3.6 is controlled by the control system. For different selected products, the control system adjusts the pressure in the first cylinder 3.6 according to the product production requirement information preset in the control system to achieve the adjustment of the ironing pressure for different products.

[0024] (2) The method for adjusting the ironing interval and the ironing holding time is: The first servo motor 3.5 is controlled by the control system. For different selected products, the control system drives the cam to rotate as required according to the product production requirement information preset in the control system through the electronic cam control principle. Among them, the first servo motor 3.5 drives the drive shaft, the drive shaft drives the cam to rotate, the cam drives the third cylinder to move up and down, and the third cylinder drives the upper hot knife seat to move up and down. That is, each hot knife is also provided with a mechanical cam, that is, the cam 3.2 on the upper hot knife mechanism 3. The control system controls the speed change of the mechanical cam when it rotates through the first servo motor through the pre-set electronic cam parameters, thereby realizing the on-demand control of the hot pressing interval and hot pressing holding time of the hot knife on the material.

[0025] (3) The position adjustment method of each ironing knife is as follows: the second servo motor 5 is controlled by the control system. For different selected products, the control system controls the rotation of the motor shaft of the second servo motor 5 according to the product production requirement information preset in the control system, thereby driving the gear fixed to the ironing knife frame 2 to rotate. Through the cooperation between the gear and the rack fixed on the frame, the ironing knife frame can move left and right along the guide rail set on the frame, thereby realizing the adjustment of the ironing knife frame.

[0026] The calibration process of each ironing knife in step (2) before use is as follows: after the machine is installed, it is powered on for the first time, and the control system obtains the current absolute position of each second servo motor by reading the absolute value encoder value of each second servo motor 5, and then calibrates each second servo motor once with the scale fixed on the frame by manually inputting data to move it, so that the absolute position of each ironing knife is known; without changing the mechanical connection, since the second servo motor has a brake characteristic, the control system can always know the actual position of each ironing knife; The adjustment process of each hot knife is as follows: manually adjust the reference axis to the required position, and then use the predetermined reference axis as a reference, according to the current actual position of the reference axis, and according to the production requirements of different products including bag making length and hot sealing requirements, set the relevant parameters in the control system. When a certain product needs to be produced, the control system automatically calculates the absolute position that each hot knife corresponding to the product needs to reach according to the preset parameters, and then directly controls each second servo motor 5 to automatically position to the corresponding position, thereby completing the adjustment of the subsequent hot knives.

[0027] The position of the reference axis is the position of a cutter on a bag making machine or the position of a preset photoelectric detection head.

[0028] When controlling the adjustment of the positions of the ironing knives, the calculation formula used in the control system is: A reference axis is preset on the frame. If the bag length is set to L, the position of the reference axis after positioning is a+Δa, where a is the standard position of the reference axis and Δa is the offset of the reference axis. Then, within the movable range: The first hot knife position b = (a + Δa) + (n + 1) L (where n = 0, 1, 2, 3, ...) The second hot knife position c = b + (n+1) L (where n = 0, 1, 2, 3, ...) The scale is a grating scale system, and the feedback of the grating scale system can better ensure the absolute position of each servo motor and prevent errors.

[0029] The grating scale system includes a grating scale, a grating scale reader and a grating scale base. The grating scale reader is fixedly connected to each servo motor and is arranged corresponding to the position of the grating scale. It moves along a straight line parallel to the grating scale and reads the scale on the grating scale. The grating scale is installed on the grating scale base, and the grating scale base is arranged on the frame.

[0030] The grating scale system is arranged parallel to the guide rail.

[0031] The one-button knife adjustment bag making machine of the present invention is simple and ingenious. After the product production requirement information including the arrangement requirement information of the hot knife positions and the hot pressing requirement parameter information including the hot pressing interval, the hot pressing holding time and the hot pressing pressure required for the production of bags of various materials and / or various models is pre-entered in the control system, when a certain bag needs to be produced, it can be directly selected with one button, and the hot pressing parameters including the hot pressing interval, the hot pressing holding time and the hot pressing pressure can be adjusted with one button, which greatly reduces the difficulty and time of knife adjustment, and also greatly improves the adjustment efficiency of the hot knife and the accuracy and quality of bag making and hot sealing. It has high production efficiency and strong practicality, and has the following advantages in particular: (1) Through the design, the one-button pressure adjustment function can be easily realized, achieving precise control of the hot pressing pressure. Whether it is the production of a single material or a variety of composite materials, it can ensure that the pressure is just right, thereby ensuring the quality and stability of the product. This means that the operator can adjust the pressure according to different production needs with just a press of a button, greatly improving production efficiency and flexibility. Without the need for tedious debugging processes, different production modes can be quickly switched to meet the diverse needs of customers.

[0032] (2) When the production line is shut down, the cylinder will drive the hot knife to automatically separate, thus avoiding the squeezing of materials and the waste of materials affected by temperature. This not only saves time and materials, but also the equipment is equipped with a non-stop material receiving function, which can improve the stability and reliability of the production line.

[0033] (3) The present invention uses full servo hot pressing technology to selectively maintain a constant holding time to ensure that each seal can achieve the best effect. Moreover, each hot knife can be independently controlled, and the operator can adjust each hot knife individually according to different product specifications and requirements to achieve personalized production. This bag making machine based on a full servo control system not only performs well in pressure control, but also has many advantages such as high efficiency, precision, and stability. It can meet the needs of different industries for bag making and packaging, and provide customers with high-quality products and services.

[0034] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. One-button knife adjustment bag making machine, used for the adaptive positioning and adjustment of the hot knife of the horizontal sealing hot knife on the bag making machine, characterized by: The bag making machine comprises a frame (1), a plurality of ironing knife racks (2) are sequentially mounted on the frame (1), each ironing knife rack (2) is provided with an upper ironing knife mechanism (3) and a lower ironing knife mechanism (4) which are arranged in an upper and lower manner, the upper ironing knife mechanism (3) comprising a driving shaft (3.1), a cam (3.2), a third cylinder (3.3) and an upper ironing knife seat (3.4) which are sequentially connected, the driving shaft (3.1) being mounted on the upper part of the ironing knife rack (2), the driving shaft (3.1) being driven by a first servo motor (3.5) which is arranged on the upper part of the ironing knife rack (2) ) is driven to rotate, the cam (3.2) is fixedly connected to the drive shaft (3.1) so as to be driven to rotate by the drive shaft (3.1), the third cylinder (3.3) is driven by the cam (3.2) to move up and down, thereby driving the upper hot knife seat (3.4) to move up and down, and the upper hot knife seat (3.4) is sequentially provided with a plurality of first cylinders (3.6) with movable ends facing downwards, and the movable ends of the first cylinders (3.6) are all fixedly connected to the upper hot knife (3.7) arranged below the upper hot knife seat (3.4); The lower ironing knife mechanism (4) comprises a lower ironing knife seat (4.1) fixedly connected to the ironing knife frame (2); a plurality of second cylinders (4.2) with movable ends facing upward are arranged in sequence above the lower ironing knife seat (4.1); the movable ends of the second cylinders (4.2) are all fixedly connected to a lower ironing knife (4.3) arranged above the lower ironing knife seat (4.1); The ironing knife frame (2) is mounted on the frame (1) via a linear guide rail (6); the second servo motor (5) is fixedly arranged on one side of the ironing knife frame (2); the second servo motor (5) drives the ironing knife frame (2) to move along the linear guide rail (6) via a gear rack transmission structure; The bag making machine is also provided with a control system, and each servo motor and each cylinder are connected to the control system for communication, so that the control system can obtain the position information of all hot knives and the downward pressure information of each hot knives, and control the rotation of each servo motor and the extension and pressure of each cylinder.

2. The one-button knife adjustment bag making machine according to claim 1, characterized in that: The second servo motor (5) is fixedly arranged on one side of the ironing knife frame via a support frame, the motor shaft of the second servo motor (5) is fixedly connected to a gear (5.1), and the frame (1) is also provided with a rack (5.2) that can cooperate with the gear.

3. The one-button knife adjustment bag making machine according to claim 1 is characterized in that: The frame is also provided with a scale for positioning.

4. The one-button knife adjustment bag making machine according to claim 1, characterized in that: The first servo motor (3.5) and the second servo motor (5) are both servo motors with brakes and absolute encoders.

5. The one-button knife adjustment bag making machine according to claim 1, characterized in that: Each ironing knife is also provided with an ironing position recognition device, which is a CCD visual recognition device or a GN photoelectric sensor. The ironing position recognition device is used as a reference to recognize and determine whether the ironing position is accurate. If there is an offset, the control system is notified to automatically adjust the position of the ironing knife so that it can be ironed accurately.

6. The control method of the one-button knife adjustment bag making machine according to any one of claims 1 to 5, characterized in that: The product production requirement information including the arrangement requirement information of the hot knife positions and the hot pressing requirement parameter information including the hot pressing interval, hot pressing holding time and hot pressing pressure required for the production of bags of various materials and / or various models is entered in the control system in advance. When a certain type of bag needs to be produced, it can be directly selected with one click, among which: (1) The cylinder control method is: When working, the movable end of the second cylinder (4.2) on the lower ironing knife seat (4.1) is always extended, and the movable end of the third cylinder (3.3) on the upper ironing knife mechanism (3) is also extended, and corresponding pressure is provided according to the ironing pressure requirement; When the machine is stopped, the movable ends of the third cylinder (3.3) and the second cylinder (4.2) are retracted to avoid excessive hot pressing and causing burns to the material; The pressure in the first cylinder (3.6) is controlled by a control system. For different selected products, the control system adjusts the pressure in the first cylinder (3.6) according to product production requirement information preset in the control system, so as to adjust the ironing pressure for different products; (2) The method for adjusting the ironing interval and the ironing holding time is: The first servo motor (3.5) is controlled by a control system. For different selected products, the control system drives the cam to rotate as required according to the product production requirement information preset in the control system through the electronic cam control principle, wherein the first servo motor (3.5) drives the drive shaft, the drive shaft drives the cam to rotate, the cam drives the third cylinder to move up and down, and the third cylinder drives the upper hot knife seat to move up and down; (3) The position adjustment method of each ironing knife is as follows: the second servo motor (5) is controlled by the control system. For different selected products, the control system controls the rotation of the motor shaft of the second servo motor (5) according to the product production requirement information preset in the control system, thereby driving the gear fixed to the ironing knife frame (2) to rotate. Through the cooperation between the gear and the rack fixed on the frame, the ironing knife frame can move left and right along the guide rail set on the frame, thereby realizing the adjustment of the ironing knife frame.

7. The control method according to claim 6, characterized in that: The calibration process of each ironing knife before use in step (2) is as follows: after the machine is installed, it is powered on for the first time, and the control system obtains the current absolute position of each second servo motor by reading the absolute encoder value of each second servo motor (5), and then calibrates each second servo motor once with the scale fixed on the frame by manually inputting data to move it, so that the absolute position of each ironing knife is known; without changing the mechanical connection, since the second servo motor has a brake characteristic, the control system can always know the actual position of each ironing knife; The adjustment process of each hot knife is as follows: manually adjust the reference axis to the required position, then take the predetermined reference axis as the reference, and set relevant parameters in the control system according to the actual position of the reference axis and the production requirements corresponding to different products, including bag making length and hot sealing requirements. When a certain product needs to be produced, the control system automatically calculates the absolute position that each hot knife corresponding to the product needs to reach according to the preset parameters, and then directly controls each second servo motor (5) to automatically position to the corresponding position, thereby completing the subsequent adjustment of each hot knife.

8. The control method according to claim 7, characterized in that: The position of the reference axis is the position of a cutter on a bag making machine or the position of a preset photoelectric detection head.

9. The control method according to claim 7, characterized in that: When controlling the adjustment of the positions of the ironing knives, the calculation formula used in the control system is: A reference axis is preset on the frame. If the bag length is set to L, the position of the reference axis after positioning is a+Δa, where a is the standard position of the reference axis and Δa is the offset of the reference axis. Then, within the movable range: The first hot knife position b = (a + Δa) + (n + 1) L (where n = 0, 1, 2, 3, ...); The second hot knife position c = b + (n+1) L (where n = 0, 1, 2, 3, ...).

10. The control method according to claim 7, characterized in that: The scale is a grating scale system.

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