Multi-module position adjustment method for a composite film bag making machine

Abstract

The present application relates to bag making machine equipment technical field, especially to a kind of multi-module position adjusting method of composite film bag making machine, based on motion module position detection mechanism, first photoelectric sensor located at the feeding side of hot knife assembly and second photoelectric sensor located at the discharging side of hot knife assembly are realized, comprising: control center obtains composite film length deformation according to the first photoelectric information and the second photoelectric information detected by first photoelectric sensor and second photoelectric sensor, and generates the first position adjusting instruction corresponding to each motion module according to the first position information of each motion module currently detected by motion module position detection mechanism and composite film length deformation;When any motion module receives first position adjusting instruction, then adjust its own position according to first position adjusting instruction.Its beneficial effect is that it can be based on composite film length variation to real-time accurate adjustment of motion module position, improve the quality of composite film finished product, reduce the waste of raw materials.

Description

Technical Field

[0001] This invention relates to the field of bag making machine technology, and in particular to a multi-module position adjustment method for a composite film bag making machine. Background Technology

[0002] Composite film bag making machines are packaging equipment that uses roll material to continuously feed material, then intermittently feed it, and finally press the upper and lower layers of composite film together with longitudinal and transverse heat sealing knives to form packaging containers. Currently, the positioning of the heat sealing seam, tear line, and cut line on bag making machines is all manually adjusted. In the actual bag making process, the pitch (distance between identical patterns) of the printed patterns on the composite film can change due to various factors. To achieve better bag making results, the distance between the multiple modules of the bag making machine must be constantly adjusted, which greatly increases the workload and seriously affects product quality. Summary of the Invention

[0003] (a) Technical problems to be solved In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a multi-module position adjustment method for a composite film bag making machine, which solves the technical problem that the position of the hot stamping knife cannot be adjusted in real time according to the pitch change of the composite film printing pattern during the bag making process, thus causing a decline in the quality of finished products and waste of raw materials.

[0004] (II) Technical Solution To achieve the above objectives, the main technical solutions adopted by the present invention include: In a first aspect, embodiments of the present invention provide a multi-module position adjustment method for a composite film bag making machine, based on a motion module position detection mechanism, a first photoelectric sensor located on the feeding side of the hot-blade assembly, and a second photoelectric sensor located on the discharging side of the hot-blade assembly; the method includes: S11. The control center determines whether the length of the composite film has changed based on the first photoelectric information detected by the first photoelectric sensor and the second photoelectric information detected by the second photoelectric sensor. If there is a change, the control center obtains the composite membrane length deformation based on the first photoelectric information and the second photoelectric information, and generates a first position adjustment command corresponding to each motion module based on the composite membrane length deformation and the current first position information of each motion module detected by the motion module position detection mechanism. S12. When any motion module receives the first position adjustment command, it adjusts its own position according to the first position adjustment command. The motion module includes a first photoelectric sensor, a hot knife assembly, and a second photoelectric sensor.

[0005] Optionally, the process may further include the following steps before step S11: S10-1. The control center determines whether there is a deviation between the current position and the expected position of each motion module based on the pre-set expected position information and the current second position information of each motion module detected by the motion module position detection mechanism. When the control center determines that there is a deviation between the current position and the desired position of any motion module, it generates a second position adjustment command based on the second position information and the desired position information of the motion module and sends it to the motion module. S10-2. When any motion module receives the second position adjustment command, it adjusts its own position according to the second position adjustment command.

[0006] Optionally, each of the motion modules includes a motion body, a servo controller, and a servo motor that drives the motion body to move linearly; The motion module position detection mechanism includes: a magnetic scale and a reading head that is fixedly connected to the motion body and corresponds to it one-to-one; Then S11 includes: The control center determines whether the length of the composite film has changed based on the first photoelectric information detected by the first photoelectric sensor and the second photoelectric information detected by the second photoelectric sensor. If there is a change, the control center obtains the deformation amount of the composite film length based on the first photoelectric information and the second photoelectric information, and generates a first position adjustment command corresponding to each servo controller based on the deformation amount of the composite film length and the first position information detected by all servo controllers; the first position information is the relative position information of the reading head fixedly connected to its corresponding moving body on the magnetic scale received by the servo controller, that is, the position information of the moving body. Then S12 includes: When any servo controller receives the first position adjustment command, it controls the corresponding servo motor to rotate according to the first control command, thereby controlling the corresponding moving body to adjust its own position.

[0007] Optionally, information is transmitted between any of the servo controllers and the control center via the MODBUS communication protocol; information is transmitted between any of the servo controllers and their corresponding reading heads via a third-party protocol.

[0008] Optionally, S11 includes: S11-1, The control center determines whether the length of the composite film has changed based on the first and second photoelectric information received at the moment. When changes occur, the control center generates the change in composite film length based on the first and second photoelectric information currently received, and generates the distance from the first photoelectric sensor to the second photoelectric sensor and the distance from the hot knife assembly to the second photoelectric sensor based on the first position information of the first photoelectric sensor, the hot knife assembly and the second photoelectric sensor detected by the current motion module position detection mechanism. Based on the distance between the first photoelectric sensor and the second photoelectric sensor, the distance between the hot knife assembly and the second photoelectric sensor, and the change in the length of the composite film, the control center generates first position adjustment commands corresponding to the first photoelectric sensor and the hot knife assembly, respectively.

[0009] Optionally, the control center generates first position adjustment commands corresponding to the first photoelectric sensor and the hot knife assembly based on the distance between the first photoelectric sensor and the second photoelectric sensor, the distance between the hot knife assembly and the second photoelectric sensor, and the change in the length of the composite film, respectively, including: The control center generates position parameters corresponding to the first photoelectric sensor and the hot knife assembly based on the distances from the first photoelectric sensor and the hot knife assembly to the second photoelectric sensor, the change in the length of the composite film, and the pre-set formula one. The control center generates first position adjustment commands for the first photoelectric sensor and the hot knife assembly respectively, based on the position parameters corresponding to the first photoelectric sensor and the hot knife assembly; the first formula is: ; Where K1 is the position parameter of the first photoelectric sensor or the hot knife assembly, and m is the distance from the first photoelectric sensor or the hot knife assembly to the second photoelectric sensor. denoted as the change in the length of the composite film, and n is the distance between the first photoelectric sensor and the second photoelectric sensor.

[0010] Optionally, the process may further include the following steps before step S10-1: S10-0, The control center generates a third position adjustment command for each motion module based on the current third position information of each motion module detected by the motion module position detection mechanism and the pre-set first composite film information; the first composite film information includes the length information, pattern position information and process requirements of the composite film. When any motion module receives a third position adjustment command, it adjusts its own position according to the third position adjustment command. After all motion modules adjust their positions according to the third position, the control center saves the current fourth position information and the third user input information of each motion module detected by the motion module position detection mechanism as a desired position information to the pre-set product formula library.

[0011] Optionally, S10-1 includes: The control center searches the product formula library to see if there is any first composite film information that is the same as the second composite film information of the pre-set composite film to be produced; the second composite film information includes: the length information of the composite film, the pattern position information, and the process requirements. If so, the control center determines whether there is a deviation between the second position information and the fourth position information of each motion module based on the second position information of each motion module detected by the motion module position detection mechanism and the fourth position information corresponding to the first composite membrane information that is the same as the second composite membrane information. When the control center determines that any motion module has a deviation, it generates a second position adjustment command based on the second and fourth position information of the motion module and sends it to the motion module. If it does not exist, the information of the second composite membrane will be used as the information of the first composite membrane, and the process will jump to S10-0.

[0012] Optionally, the motion module further includes: a punch and a cutter located on the discharge side of the second photoelectric sensor and arranged sequentially along the discharge direction; Then S11 further includes: S11-2. The control center receives and records the second photoelectric information detected by the second photoelectric sensor in real time, and generates the fourth position adjustment command corresponding to the punch and the cutter based on the first position information of the second photoelectric sensor, the punch, and the cutter detected by the motion module position detection mechanism, as well as all the second photoelectric information and the third composite film information of the composite film produced by the current bag making machine. The third composite film information includes: the length information and pattern position information of the composite film. Then S12 includes: When the first photoelectric sensor, the hot knife assembly, or the second photoelectric sensor receives the first position adjustment command, it adjusts its own position according to the first position adjustment command. When the punch or hot knife receives the fourth position adjustment command, it adjusts its own position according to the fourth control command.

[0013] Optionally, S11-2 includes: The control center obtains the distance between the cutter and the second photoelectric sensor based on the current first position information of the cutter and the second photoelectric sensor. Based on this distance and the third composite film information, the control center filters all the second photoelectric information to obtain the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film, and the second photoelectric information corresponding to the composite film the cutter is about to process. The control center then generates the position parameters corresponding to the cutter based on the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film, the second photoelectric information corresponding to the composite film the cutter is about to process, the pre-set third composite film information, and the pre-set formula two. The control center obtains the distance between the punch and the second photoelectric sensor based on the current first position information of the punch and the second photoelectric sensor. Then, based on this distance and the third composite film information, it filters all the second photoelectric information to obtain the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film, and the second photoelectric information corresponding to the composite film the punch is about to process. The control center then generates the position parameters corresponding to the punch based on the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film, the second photoelectric information corresponding to the composite film the punch is about to process, the pre-set third composite film information, and the pre-set formula two. The control center generates fourth position adjustment commands for the cutter and punch respectively based on their position parameters; the second formula is: ; in, These are the position parameters corresponding to the cutter or punch. The second photoelectric information is the latest record from the control center. The second photoelectric information corresponds to the most recently processed composite film by a cutter or punch. The second photoelectric information is the composite film that the cutter or punch is about to process, where u is the ratio of the pattern position information to the length information of the composite film.

[0014] (III) Beneficial Effects The beneficial effects of this invention are as follows: The multi-module position adjustment method of the composite film bag making machine of this invention uses a photoelectric sensor to detect the deformation of the composite film length and a motion module position detection mechanism to detect the position information of the motion module. Compared with the prior art, it can adjust the position of the motion module in real time and accurately based on the change of the composite film length, thereby improving the quality of the finished product and reducing the waste of raw materials. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a composite film bag making machine according to Example 1; Figure 2 This is a schematic diagram of the motion module position detection mechanism according to Embodiment 1; Figure 3 This is a schematic diagram of the hot iron assembly structure according to Embodiment 1; Figure 4 This is a flowchart of a multi-module position adjustment method for a composite film bag making machine according to Example 2; Figure 5 This is a signal transmission logic block diagram of a multi-module position adjustment method for a composite film bag making machine according to Embodiment 2.

[0016] [Explanation of Labels in the Attached Image] 1: Frame; 11: Cutter; 12: Second traction; 13: Puncher; 14: Second photoelectric sensor; 15: First photoelectric sensor; 16: Second traction; 17: Floating roller; 18: Hot knife assembly; 21: Magnetic scale guide rail; 22: Magnetic scale; 23: Reading head; 31: Lead screw; 32: Servo motor. Detailed Implementation

[0017] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] The multi-module position adjustment method for a composite film bag making machine proposed in this embodiment of the invention uses a photoelectric sensor to detect the deformation of the composite film length and a motion module position detection mechanism to detect the position information of the motion module. Compared with the prior art, it can adjust the position of the motion module in real time and accurately based on the change in the composite film length, thereby improving the quality of the finished product and reducing the waste of raw materials.

[0019] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0020] Example 1 This embodiment provides a composite film bag making machine, such as Figure 1 As shown, it includes: a frame 1 and a first photoelectric sensor 15, a first traction 16, a floating roller 17, a hot knife assembly 18, a second photoelectric sensor 14, a punch 13, a second traction 12 and a cutter 11, which are sequentially mounted along the feeding direction of the frame 1; The first traction 16 and the second traction 12 are the power sources for intermittently pulling the composite film. They are formed by two sets of upper and lower rubber rollers clamping the composite film and making it rotate. Their positions on the production line are fixed. The first photoelectric sensor 15, the hot knife assembly 18, the second photoelectric sensor 14, the punch 13, and the cutter 11 are motion modules. They are all driven by a servo motor 32 to drive the lead screw 31, which drives the motion module to move back and forth on the linear guide rail as needed.

[0021] like Figure 2 As shown, a magnetic strip cut to size as needed is pasted on the magnetic ruler guide rail 21. The entire magnetic ruler guide rail 21 is fixed to the wall panel of the bag making machine. Each motion module has a reading head 23 fixed by an L-shaped plate. The motion module moves back and forth, driving the reading head 23 to move. The reading head 23 moves relative to the magnetic ruler 22 and can read the actual position.

[0022] Generally, the hot-seal knife assembly consists of 3 heat-sealing blades and 1 cold-sealing blade. The structure of any one of the heat-sealing or cold-sealing blades is as follows: Figure 3 As shown, a lead screw 31 runs through all the motion modules between the lower part of the hot knife and the base of the bag-making machine, and is fixed at both ends by a lead screw 31 fixing seat. The hot knife is connected to the slider, which is connected to the hot knife moving gear through a thrust bearing. The moving gear is connected to the servo motor 32 that moves the hot knife through a synchronous belt gear. On the other side, the hot knife is connected to the reading head 23 through an "L" plate. The reading head 23 is perpendicular to the magnetic scale 22 and maintains a certain distance error range to ensure the normal operation of the reading head 23. The structure of the other motion modules is similar to that of the hot knife.

[0023] A custom-made magnetic scale 22, of the required length, is fixed to the wall panel of the bag-making machine. The deviation of the magnetic scale 22 in the horizontal and vertical directions must meet the requirement of ±100µm to ensure the normal operation of the reading head 23. Each reading head 23 and motion module are reliably fixed. Within the full stroke range, the fluctuation range of the reading head 23 in the vertical and horizontal directions should also be within ±500µm. Each motion module is driven by its corresponding servo motor 32 via a lead screw 31. Each motion module has a corresponding servo motor 32 and servo controller. The servo controller is connected to the corresponding servo motor 32. Simultaneously, the reading head 23 is connected to the corresponding servo controller via a third-party protocol. The servo controller collects data from the reading head 23 in real time and feeds it back to the external positioning loop of the servo controller as data from an external positioning sensor, achieving precise positioning of the motor within the data from the magnetic scale 22. The control center and all servo controllers are physically connected via RS485, achieving one-to-many master-slave communication, and can continuously read the position data from the reading head 23 as an external sensor. This data can be used in the control center to calculate the relative positions of the motion modules, track the external printed patterns, and reproduce the position of the positioning module before power-on, achieving a one-click positioning function. Furthermore, even if the module moves while the power is off, because the magnetic grating system uses an absolute value system, the reading head 23 can immediately read the current position on the magnetic grating ruler 22 upon power-on, without losing data on movement during power-off. Moreover, since multiple reading heads 23 read data from the same magnetic grating ruler 22, they avoid system errors such as inaccurate installation positions introduced by reading data from multiple magnetic grating rulers 22 separately, thus improving the accuracy of the reading position.

[0024] Of course, the motion module position detection mechanism can be replaced by a grating ruler or magnetostrictive position sensor, or other device or component that can detect the position of the motion module in real time.

[0025] This embodiment provides a composite film bag making machine that provides a structural basis for achieving precise positioning of each motion module and real-time precise adjustment of the position of the motion module based on the change in the length of the composite film, thereby improving the quality of the finished composite film and reducing the waste of raw materials.

[0026] Example 2 This embodiment provides a multi-module position adjustment method for a composite film bag making machine based on Embodiment 1, such as... Figure 4 As shown, it includes: When no material is loaded, the control center generates a third position adjustment command corresponding to each motion module based on the third position information received from each servo controller and the pre-set first composite film information. The first composite film information includes the length information, pattern position information and process requirements of the composite film. The process requirements include the position of the cutter 11, the punch 13, the hot knife assembly 18, the first photoelectric sensor 15 and the second photoelectric sensor 14 acting on the composite film. When any servo controller receives a third position adjustment command, it controls the corresponding servo motor 32 to rotate according to the command, thereby driving the motion module to move towards the desired position. Each servo controller and the control center are connected via the MODBUS communication protocol, while the reading head 23 and its corresponding servo controller are connected via a third-party protocol, enabling position calculation, precise positioning, and position reproduction among multiple modules of the bag-making machine. This ensures that the position information is not affected during power outages. The absolute value magnetic grating reading head 23 and the servo drive have a communication protocol, allowing the servo controller to obtain the position encoding data of the magnetic grating ruler 22 in real time. This data enters the position loop of the servo system, achieving a fully closed-loop position positioning function. Simultaneously, the control center can read multiple data points from the servo controller via the standard MODBUS communication protocol, including the position data from the external magnetic grating reading head 23, for calculating the positional relationships between motion modules, such as... Figure 5 As shown.

[0027] After all motion modules adjust their positions according to the third position, the control center saves the current fourth position information of the corresponding motion module and the third user input information received from each servo controller as a desired position information to the pre-set product formula library.

[0028] When the control center receives information about the second composite film to be produced, it searches the product formula library to see if there is any first composite film information that is the same as the second composite film information. The second composite film information includes: the length information of the composite film, the pattern position information, and the process requirements.

[0029] If so, the control center determines whether there is a deviation between the second position information and the fourth position information of each motion module based on the current second position information of each motion module and the fourth position information corresponding to the first composite membrane information that is the same as the second composite membrane information. When the control center determines that any motion module has a deviation, it generates a second position adjustment command based on the second and fourth position information of the motion module and sends it to the motion module. If it does not exist, the information of the second composite membrane will be used as the information of the first composite membrane for repositioning.

[0030] This embodiment provides a memory function for the composite film bag making machine by establishing a product formula library. When changing product specifications, the memory position in the product formula library can be directly retrieved and compared with the current position. The servo motor is then driven to move the motion module to the corresponding position, realizing one-click positioning. This reduces the waste of raw materials during manual positioning and further reduces the consumption of human resources during the positioning process, saving manpower and material resources.

[0031] After positioning is completed, material feeding begins. Because the pitch of the printed pattern on the composite film changes during the feeding process, the position of the motion module needs to be adjusted in real time. The adjustment process of the hot-scalpel assembly 18, the first photoelectric sensor 15, and the second photoelectric sensor 14 is different from the adjustment process of the punch 13 and the cutter 11.

[0032] The adjustment process of the hot knife assembly 18, the first photoelectric sensor 15, and the second photoelectric sensor 14 is as follows: The control center determines whether the length of the composite film has changed based on the first and second photoelectric information received. When changes occur, the control center generates the change in composite film length based on the first and second photoelectric information currently received, and generates the distance from the first photoelectric sensor 15 to the second photoelectric sensor 14 and the distance from the hot knife assembly 18 to the second photoelectric sensor 14 based on the first position information of the first photoelectric sensor 15, the hot knife assembly 18 and the second photoelectric sensor 14 detected by the current motion module position detection mechanism. The control center generates position parameters corresponding to the first photoelectric sensor 15 and the hot knife assembly 18 respectively based on the distances from the first photoelectric sensor 15 and the hot knife assembly 18 to the second photoelectric sensor 14, the change in the length of the composite film, and the preset formula 1. The control center generates first position adjustment commands for the first photoelectric sensor 15 and the hot knife assembly 18 respectively, based on the position parameters corresponding to the first photoelectric sensor 15 and the hot knife assembly 18; the first formula is: ; Where K1 is the position parameter of the first photoelectric sensor 15 or the hot knife assembly 18, and m is the distance from the first photoelectric sensor 15 or the hot knife assembly 18 to the second photoelectric sensor 14. The change in the length of the composite film is denoted by n, and n is the distance between the first photoelectric sensor 15 and the second photoelectric sensor 14.

[0033] That is, during the operation of the composite film bag making machine, two photoelectric sensors measure the length of their respective patterns before and after each cycle. After a certain interval of cycles, such as 10 cycles, the change in composite film length between the two photoelectric sensors can be statistically calculated as ΔL. If the distance between a heat-sealing knife and photoelectric sensor 2 is m, and the spacing between the two photoelectric sensors is n, then the position parameters of the heat-sealing knife are: Similarly, the position changes of other heat sealing knives or cold sealing knives are also obtained through the same calculation method, driving their respective servo motors 32 to correct the position of the heat sealing knives or cold sealing knives, so as to realize the real-time tracking of the pattern position by the heat sealing knives or cold sealing knives.

[0034] Furthermore, the cutter 11 and perforator 13, which achieve one-click positioning, can adjust their positions in real time based on the position of the second photoelectric sensor 14, thus enabling the cutter 11 and perforation position to track the pattern. Taking cutter 11 position tracking as an example, assuming the photoelectric sensor is located in the center of the composite film, i.e., the distance from the composite film cut to the positioning pattern is 0.5 bag lengths, in an actual bag-making machine... The distance from the cutter 11 to the second photoelectric sensor 14 is 350mm. The composite film is 100mm long. Therefore, there are three complete composite films between the cutter 11 and the second photoelectric sensor 14, and the composite film below the second photoelectric sensor 14 (referred to as composite film 1, composite film 2, composite film 3, and composite film 4 in the direction from the cutter 11 to the second photoelectric sensor 14). The second photoelectric information detected by the second photoelectric sensor 14 is O1, O2, O3, and O4 (in the direction from the cutter 11 to the second photoelectric sensor 14). O1, O2, O3, and O4 correspond to the pattern distances from composite film 0 to composite film 1, from composite film 1 to composite film 2, from composite film 2 to composite film 3, and from composite film 3 to composite film 4, respectively. After the cutter 11 moves, composite film 1 exits from the cutter 11 position, and composite film 5 enters the second photoelectric sensor 14 and is located below it. The pattern distance from composite film 4 to composite film 5 is denoted as O5.

[0035] At this point, K2 = (0.5O2 + O3 + O4 + O5) - (0.5O1 + O2 + O3 + O4) = O5 - 0.5O1 - O2; K 2即 This is the position parameter of the cutter 11 at this time. The second photoelectric information is the latest record from the control center. The second photoelectric information corresponding to the most recently processed composite film by cutter 11. The second photoelectric information is the composite film that the cutter 11 is about to process.

[0036] The control center obtains the distance between the cutter 11 and the second photoelectric sensor 14 based on the current first position information of the cutter 11 and the second photoelectric sensor 14. Based on this distance and the third composite film information, the control center filters all the second photoelectric information to obtain the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film by the cutter 11, and the second photoelectric information corresponding to the composite film that the cutter 11 is about to process. The control center then generates the position parameters corresponding to the cutter 11 based on the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film by the cutter 11, the second photoelectric information corresponding to the composite film that the cutter 11 is about to process, the pre-set third composite film information, and the pre-set formula two. Based on the current first position information of the puncher 13 and the second photoelectric sensor 14, the control center obtains the distance between the puncher 13 and the second photoelectric sensor 14. Based on this distance and the third composite film information, the control center filters all the second photoelectric information to obtain the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film by the puncher 13, and the second photoelectric information corresponding to the composite film that the puncher 13 is about to process. Based on the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film by the puncher 13, the second photoelectric information corresponding to the composite film that the puncher 13 is about to process, the pre-set third composite film information, and the pre-set formula two, the control center generates the position parameters corresponding to the puncher 13. The control center generates fourth position adjustment commands for the cutter 11 and the punch 13 respectively, based on the position parameters of the cutter 11 and the punch 13; the second formula is: ; in, For the position parameters corresponding to the cutter 11 or the punch 13, The second photoelectric information is the latest record from the control center. The second photoelectric information corresponding to the most recently processed composite film by cutter 11 or punch 13. The second photoelectric information is the composite film that the cutter 11 or punch 13 is about to process, where u is the ratio of the pattern position information to the length information of the composite film.

[0037] When the servo controller corresponding to the punch 13 or the hot knife receives the fourth position adjustment command, it controls the corresponding servo motor 32 to rotate according to the fourth control command, thereby adjusting its own position.

[0038] This embodiment provides a multi-module position adjustment method for a composite film bag making machine. By connecting multiple servo motors 32 to signals from external position sensors, the method enables position calculation, precise positioning, image tracking, and position reproduction among the multiple modules of the composite film bag making machine.

[0039] The control center reads multiple data from the servo controller through the standard MODBUS communication protocol. There is a third-party communication protocol between the absolute value magnetic grating reading head 23 and the servo drive. The servo controller can obtain the position encoding data of the magnetic grating ruler 22 in real time. This data enters the position loop of the servo system to realize the full closed-loop position positioning function.

[0040] Photoelectric sensors measure the pitch of the pattern on the composite film, enabling position tracking of each motion module and improving product quality. Two photoelectric sensors measure the length of the composite film they pass through. Combined with the distance between the motion modules, and using the second photoelectric sensor 14 as a reference, the position of each motion module can be located. At certain intervals (preset time), the respective servo motors 32 are driven to correct the position of the motion modules, achieving pattern tracking and improving product quality while reducing material waste. Furthermore, the pattern tracking by two photoelectric sensors ensures constant tension of the composite film at different lengths, which helps reduce film stretching and improves product quality.

[0041] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for adjusting the position of multiple modules in a composite film bag making machine, characterized in that, The method is implemented based on a motion module position detection mechanism, a first photoelectric sensor located on the feeding side of the hot knife assembly, and a second photoelectric sensor located on the discharging side of the hot knife assembly; the method includes: S10-0, The control center generates a third position adjustment command for each motion module based on the current third position information of each motion module detected by the motion module position detection mechanism and the pre-set first composite film information; the first composite film information includes the length information, pattern position information and process requirements of the composite film. When any motion module receives a third position adjustment command, it adjusts its own position according to the third position adjustment command. After all motion modules adjust their positions according to the third position, the control center saves the current fourth position information and third user input information of each motion module detected by the motion module position detection mechanism as a desired position information to the pre-set product formula library. S10-1. The control center searches the product formula library to see if there is any first composite film information that is the same as the second composite film information of the composite film to be produced in the pre-set process; the second composite film information includes: the length information of the composite film, the pattern position information and the process requirements. If so, the control center determines whether there is a deviation between the second position information and the fourth position information of each motion module based on the second position information of each motion module detected by the motion module position detection mechanism and the fourth position information corresponding to the first composite membrane information that is the same as the second composite membrane information. When the control center determines that any motion module has a deviation, it generates a second position adjustment command based on the second and fourth position information of the motion module and sends it to the motion module. If it does not exist, the information of the second composite membrane will be used as the information of the first composite membrane, and the process will jump to S10-0. S10-2. When any motion module receives the second position adjustment command, it adjusts its own position according to the second position adjustment command. S11. The control center determines whether the length of the composite film has changed based on the first photoelectric information detected by the first photoelectric sensor and the second photoelectric information detected by the second photoelectric sensor. If there is a change, the control center obtains the composite membrane length deformation based on the first photoelectric information and the second photoelectric information, and generates a first position adjustment command corresponding to each motion module based on the composite membrane length deformation and the current first position information of each motion module detected by the motion module position detection mechanism. S12. When any motion module receives the first position adjustment command, it adjusts its own position according to the first position adjustment command. The motion module includes a first photoelectric sensor, a hot knife assembly, and a second photoelectric sensor.

2. The multi-module position adjustment method for the composite film bag making machine according to claim 1, characterized in that, Each of the motion modules includes a motion body, a servo controller, and a servo motor that drives the motion body to move linearly; The motion module position detection mechanism includes: a magnetic scale and a reading head that is fixedly connected to the motion body and corresponds to it one-to-one; Then S11 includes: The control center determines whether the length of the composite film has changed based on the first photoelectric information detected by the first photoelectric sensor and the second photoelectric information detected by the second photoelectric sensor. If there is a change, the control center obtains the deformation amount of the composite film length based on the first photoelectric information and the second photoelectric information, and generates a first position adjustment command corresponding to each servo controller based on the deformation amount of the composite film length and the first position information detected by all servo controllers; the first position information is the relative position information of the reading head fixedly connected to its corresponding moving body on the magnetic scale received by the servo controller, that is, the position information of the moving body. Then S12 includes: When any servo controller receives the first position adjustment command, it controls the corresponding servo motor to rotate according to the first control command, thereby controlling the corresponding moving body to adjust its own position.

3. The multi-module position adjustment method for the composite film bag making machine according to claim 2, characterized in that, Information is transmitted between any of the servo controllers and the control center via the MODBUS communication protocol; information is transmitted between any of the servo controllers and their corresponding reading heads via a third-party protocol.

4. The multi-module position adjustment method for the composite film bag making machine according to claim 1, characterized in that, S11 includes: S11-1, The control center determines whether the length of the composite film has changed based on the first and second photoelectric information received at the moment. When changes occur, the control center generates the change in composite film length based on the first and second photoelectric information currently received, and generates the distance from the first photoelectric sensor to the second photoelectric sensor and the distance from the hot knife assembly to the second photoelectric sensor based on the first position information of the first photoelectric sensor, the hot knife assembly and the second photoelectric sensor detected by the current motion module position detection mechanism. Based on the distance between the first photoelectric sensor and the second photoelectric sensor, the distance between the hot knife assembly and the second photoelectric sensor, and the change in the length of the composite film, the control center generates first position adjustment commands corresponding to the first photoelectric sensor and the hot knife assembly, respectively.

5. The multi-module position adjustment method for the composite film bag making machine according to claim 4, characterized in that, The control center generates first position adjustment commands corresponding to the first photoelectric sensor and the hot knife assembly, respectively, based on the distances from the first photoelectric sensor to the second photoelectric sensor, the distances from the hot knife assembly to the second photoelectric sensor, and the change in the length of the composite film. These commands include: The control center generates position parameters corresponding to the first photoelectric sensor and the hot knife assembly based on the distances from the first photoelectric sensor and the hot knife assembly to the second photoelectric sensor, the change in the length of the composite film, and the pre-set formula one. The control center generates first position adjustment commands for the first photoelectric sensor and the hot knife assembly respectively, based on the position parameters corresponding to the first photoelectric sensor and the hot knife assembly; the first formula is: ； Where K1 is the position parameter of the first photoelectric sensor or the hot knife assembly, and m is the distance from the first photoelectric sensor or the hot knife assembly to the second photoelectric sensor. denoted as the change in the length of the composite film, and n is the distance between the first photoelectric sensor and the second photoelectric sensor.

6. The multi-module position adjustment method for the composite film bag making machine according to claim 5, characterized in that, The motion module further includes: a punch and a cutter located on the discharge side of the second photoelectric sensor and arranged sequentially along the discharge direction; Then S11 further includes: S11-2. The control center receives and records the second photoelectric information detected by the second photoelectric sensor in real time, and generates the fourth position adjustment command corresponding to the punch and the cutter based on the first position information of the second photoelectric sensor, the punch, and the cutter detected by the motion module position detection mechanism, as well as all the second photoelectric information and the third composite film information of the composite film produced by the current bag making machine. The third composite film information includes: the length information and pattern position information of the composite film. Then S12 includes: When the first photoelectric sensor, the hot knife assembly, or the second photoelectric sensor receives the first position adjustment command, it adjusts its own position according to the first position adjustment command. When the punch or hot knife receives the fourth position adjustment command, it adjusts its own position according to the fourth control command.

7. The multi-module position adjustment method for the composite film bag making machine according to claim 6, characterized in that, S11-2 includes: The control center obtains the distance between the cutter and the second photoelectric sensor based on the current first position information of the cutter and the second photoelectric sensor. Based on this distance and the third composite film information, the control center filters all the second photoelectric information to obtain the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film, and the second photoelectric information corresponding to the composite film the cutter is about to process. The control center then generates the position parameters corresponding to the cutter based on the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film, the second photoelectric information corresponding to the composite film the cutter is about to process, the pre-set third composite film information, and the pre-set formula two. The control center obtains the distance between the punch and the second photoelectric sensor based on the current first position information of the punch and the second photoelectric sensor. Then, based on this distance and the third composite film information, it filters all the second photoelectric information to obtain the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film, and the second photoelectric information corresponding to the composite film the punch is about to process. The control center then generates the position parameters corresponding to the punch based on the latest recorded second photoelectric information, the second photoelectric information corresponding to the most recently processed composite film, the second photoelectric information corresponding to the composite film the punch is about to process, the pre-set third composite film information, and the pre-set formula two. The control center generates fourth position adjustment commands for the cutter and punch respectively based on their position parameters; the second formula is: ； in, These are the position parameters corresponding to the cutter or punch. The second photoelectric information is the latest record from the control center. The second photoelectric information corresponds to the most recently processed composite film by a cutter or punch. The second photoelectric information is the composite film that the cutter or punch is about to process, where u is the ratio of the pattern position information to the length information of the composite film.

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