Particle packing machine, method, system, and computer readable storage medium

Abstract

A method for aligning a particle packaging machine, comprising: obtaining a current position of a longitudinal sealing roller when a current alignment mark of a packaging material is detected by an alignment mark detection device; obtaining a position difference value by subtracting a standard position of the longitudinal sealing roller corresponding to the current alignment mark from the current position; and calculating a set rotating speed of the longitudinal sealing roller for a next running period according to the position difference value, so that a length difference value obtained by subtracting a traction length of the longitudinal sealing roller at the set rotating speed in the next running period from a traction length of the longitudinal sealing roller at a standard working rotating speed in one running period is equal to the position difference value. The method for aligning is conducive to improving the alignment response speed, thereby improving the alignment accuracy. In addition, an alignment system, a particle packaging machine and a computer readable storage medium are also provided.

Description

Technical Field

[0001] This invention relates to the field of granule packaging technology, and in particular to a benchmarking method, benchmarking system, granule packaging machine, and computer-readable storage medium for granule packaging machines. Background Technology

[0002] The packaging material for granules is printed with markings. The granule packaging machine adjusts its mechanisms by detecting the position of these markings, ensuring that the horizontal sealing, lettering, cutting the tear line, and cutting are all performed according to the markings to guarantee the quality of the packaging bags. This process is called "alignment." The horizontal sealing roller, lettering roller, tear line roller, and cutter roller operate according to a fixed cam curve, and alignment is achieved by adjusting the rotation of the longitudinal sealing roller. Currently, the rotation adjustment of the longitudinal sealing roller is achieved through a position ring, which has a slow response speed and negatively impacts alignment accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide a calibration method for a granule packaging machine, which facilitates achieving higher calibration accuracy.

[0004] Another objective of this invention is to provide a calibration system for a granule packaging machine that facilitates achieving high calibration accuracy.

[0005] Another object of the present invention is to provide a granule packaging machine that can achieve high alignment accuracy.

[0006] Another object of the present invention is to provide a computer-readable storage medium that facilitates high alignment accuracy in granule packaging machines.

[0007] This invention provides a calibration method for a granule packaging machine, comprising: obtaining the current position of the longitudinal sealing roller when the calibrator detects the current calibrator on the packaging material; subtracting the standard position of the longitudinal sealing roller corresponding to the current calibrator from the current position to obtain a position difference; and calculating the set rotation speed of the longitudinal sealing roller for the next running segment based on the position difference, so that the length difference obtained by subtracting the traction length of the longitudinal sealing roller at the set rotation speed from the traction length of the longitudinal sealing roller at the standard operating speed in one running segment is equal to the position difference.

[0008] The calibration method of this granule packaging machine calculates the position difference based on the current position of the longitudinal sealing roller when the calibration point is detected by the calibration point detection device, and calculates the set speed of the longitudinal sealing roller for the next running segment based on the position difference. The speed adjustment of the longitudinal sealing roller can be achieved through the speed loop, which helps to improve the response speed and thus improve the calibration accuracy.

[0009] In another illustrative embodiment of the calibration method for granule packaging machines, the current position and the standard position are represented by the cumulative stroke of a point where the longitudinal sealing roller contacts the packaging material. This facilitates calculations.

[0010] In another illustrative embodiment of the calibration method for the granule packaging machine, the set rotational speed for the next running segment is a constant value. This facilitates calculation, improves response speed, and thus achieves higher calibration accuracy.

[0011] In another illustrative embodiment of the calibration method for the granule packaging machine, the speed curve for the set speed of the next running segment consists of a uniform acceleration segment and a uniform deceleration segment. The absolute values ​​of the acceleration in the uniform acceleration segment and the uniform deceleration segment are the same. The starting speed of the speed curve for the set speed of the next running segment is the rotational speed of the longitudinal sealing roller when the marking detection device detects the current marking on the packaging material, and the ending speed is the standard operating speed of the longitudinal sealing roller. This helps to improve the smoothness of operation and avoid overload caused by excessively rapid speed changes.

[0012] In another illustrative embodiment of the alignment method for a granule packaging machine, the position of the longitudinal sealing roller when the marking detection device detects the first marking point after alignment begins is obtained and recorded as the initial position. Based on the initial position and the standard spacing of the marking points, the standard position of the longitudinal sealing roller corresponding to each subsequent marking point is calculated. This facilitates calculation.

[0013] In another illustrative embodiment of the calibration method for the granule packaging machine, the starting point of the next running segment is the moment when the puncture detection device detects the current puncture on the packaging material. This facilitates increasing the maximum allowable duration of the next running segment.

[0014] In another illustrative embodiment of the benchmarking method for granule packaging machines, the duration of a running segment is the time required for the longitudinal sealing roller to rotate one revolution at the standard operating speed.

[0015] In another illustrative embodiment of the calibration method for a granule packaging machine, the calibration method further includes, after obtaining the position difference, first determining whether the position difference is greater than or equal to a threshold. If the determination result is that the position difference is greater than or equal to the threshold, then the set speed of the longitudinal sealing roller for the next running segment is calculated based on the position difference. If the determination result is that the position difference is less than the threshold, then the calibration for the current calibration point is terminated. This allows for a convenient balance between calibration accuracy and calibration cost by adjusting the threshold according to actual conditions.

[0016] The present invention also provides a calibration system for a granule packaging machine, comprising at least one memory and at least one processor. The at least one memory stores a computer program, and the at least one processor calls the computer program stored in the at least one memory to execute the calibration method of the granule packaging machine described above. This calibration system for the granule packaging machine improves calibration response speed, thereby improving calibration accuracy.

[0017] The present invention also provides a granule packaging machine, which includes a calibration system for the aforementioned granule packaging machine. This granule packaging machine facilitates improved calibration response speed, thereby improving calibration accuracy.

[0018] The present invention also provides a computer-readable storage medium having a computer program stored thereon, the computer program being executable by a processor to implement the above-described calibration method for a granule packaging machine. This computer-readable storage medium facilitates improved calibration response speed, thereby improving calibration accuracy. Attached Figure Description

[0019] The following figures are for illustrative purposes only and do not limit the scope of the invention.

[0020] Figure 1 This is an illustrative description of the working process of a granule packaging machine.

[0021] Figure 2 This is a flowchart illustrating one implementation of a benchmarking method for granule packaging machines.

[0022] Figure 3 Used to indicate the standard position corresponding to each punctuation mark.

[0023] Figure 4 and Figure 5 Used to schematically display the set rotational speed for the next running segment.

[0024] Figure 6 This is a flowchart illustrating another illustrative implementation of the benchmarking method for granule packaging machines.

[0025] Label Explanation

[0026] 11. Longitudinal sealing roller

[0027] 12 Horizontal sealing rollers

[0028] 13 Typewriter roller

[0029] 14. Broken roller

[0030] 15 Cutting rollers

[0031] 16. Punctuation point detection device

[0032] 20 Packaging Materials

[0033] 21 punctuation marks Detailed Implementation

[0034] To provide a clearer understanding of the technical features, objectives, and effects of the invention, specific embodiments of the invention are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0035] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0036] To keep the drawings simple, each drawing only schematically shows the parts related to the present invention, and they do not represent the actual structure of the product.

[0037] Granule packaging machines can process packaging materials into packaging bags. Figure 1 This is used to illustrate a schematic working process of a granule packaging machine, such as Figure 1 As shown, the packaging material 20 passes sequentially on the granule packaging machine, for example, through longitudinal sealing roller 11 for longitudinal sealing, transverse sealing roller 12 for transverse sealing, typing roller 13 for typing, breaking line roller 14 for cutting the breaking line, and cutter roller 15 for cutting, ultimately forming a packaging bag. The longitudinal sealing roller 11 serves to pull the packaging material while performing longitudinal sealing. Those skilled in the art will understand that in some cases, some steps can be omitted, such as omitting the typing roller 13 and the breaking line roller 14.

[0038] The packaging material 20 is printed with markings 21, which are spaced apart along the length of the packaging material 20. During processing, horizontal sealing, lettering, cutting break lines, and cutting are performed according to the positions of the markings 21. Since the horizontal sealing roller 12, lettering roller 13, break line roller 14, and cutting roller 15 run continuously according to a fixed cam curve, we expect the spacing between adjacent markings 21 to be constant. However, this is not the case in reality, and due to various reasons, the spacing between adjacent markings 21 will fluctuate to some extent. Therefore, we need to adjust the conveying speed of the packaging material 20 in advance according to the position of each marking 21 to ensure that each marking 21 is aligned as much as possible when it reaches the horizontal sealing roller 12. We have set up a marking detection device 16 upstream of the longitudinal sealing roller 11 to detect the markings 21. Whenever a marking 21 passes by, the marking detection device 16 will generate a corresponding signal. Since the longitudinal sealing roller 11 plays a role in traction of the packaging material, the conveying speed of the packaging material 20 can be adjusted by adjusting the rotation speed of the longitudinal sealing roller 11.

[0039] Figure 2 This is a flowchart illustrating a illustrative implementation of a calibration method for a granule packaging machine. For ease of understanding, the concepts of standard calibrator spacing and standard operating speed are first introduced: Assuming the spacing between adjacent calibrators is a constant standard calibrator spacing, after one calibration is completed, the longitudinal sealing roller rotates at a uniform standard operating speed, ensuring alignment of subsequent calibrators when they reach the transverse sealing roller. At the start of calibration, the longitudinal sealing roller operates at its standard operating speed.

[0040] like Figure 2As shown, the calibration method of the granule packaging machine includes steps S10 to S30. It should be noted that steps S10 to S30 are calibration processes for one punctuation point. For multiple consecutive punctuation points, steps S10 to S30 can be repeated.

[0041] S10: Obtain the current position X of the longitudinal sealing roller when the puncture detection device detects the current puncture on the packaging material. This current position is represented, for example, by the cumulative travel of the longitudinal sealing roller at a point in contact with the packaging material.

[0042] S20: Subtract the standard position Y of the longitudinal sealing roller corresponding to the current mark from the current position X to obtain the position difference Z, i.e., Z = XY. This standard position is represented, for example, by the cumulative travel of a point on the packaging material where the longitudinal sealing roller contacts the material. The standard position is interpreted as follows: if the current position of the longitudinal sealing roller is the standard position when the mark detection device detects the current mark on the packaging material, then the longitudinal sealing roller will rotate at a constant speed at the standard operating speed from the moment the mark detection device detects the current mark on the packaging material, ensuring alignment when the current mark reaches the transverse sealing roller.

[0043] The method for obtaining the standard position is as follows: Obtain the position of the longitudinal sealing roller when the marking detection device detects the first marking point after the alignment begins and record it as the initial position. Then, calculate the standard position of the longitudinal sealing roller corresponding to each subsequent marking point based on the initial position and the standard spacing of the marking points. Specifically, if the alignment is accurate when the marking detection device detects the first marking point after the alignment begins (i.e., after the alignment begins, the longitudinal sealing roller moves at a constant speed at the standard operating speed from the moment the marking detection device detects the first marking point on the packaging material, ensuring alignment when the first marking point reaches the transverse sealing roller), then the standard positions corresponding to each marking point are as follows: Figure 3 As shown, L is the initial position and a is the standard spacing of punctuation marks.

[0044] S30: Calculate the set rotational speed of the longitudinal sealing roller for the next running segment based on the position difference, so that the length difference obtained by subtracting the traction length of the longitudinal sealing roller at the set rotational speed from the traction length of the longitudinal sealing roller in one running segment at the standard operating speed equals the position difference. The traction length is the length of the packaging material being pulled during the rotation of the longitudinal sealing roller, which is equal to the travel distance of a point on the packaging material that the longitudinal sealing roller contacts during the rotation of the longitudinal sealing roller. The end point of the next running segment should be before the current mark reaches the transverse sealing roller. The start point of the next running segment is, for example, the moment when the mark detection device detects the current mark on the packaging material, thereby facilitating an increase in the maximum permissible duration of the next running segment, but is not limited to this. The duration of a running segment is, for example, the time taken for the longitudinal sealing roller to rotate one revolution at the standard operating speed, but is not limited to this. In other illustrative embodiments, the duration of a running segment can be adjusted as needed. It should be noted that if a new set speed (i.e., the set speed for the punctuation after the current punctuation) is not generated before the end of the next running segment, the speed of the longitudinal sealing roller will return to the standard operating speed at the end of the next running segment; if a new set speed (i.e., the set speed for the punctuation after the current punctuation) is generated before the end of the next running segment, the new set speed will be executed directly.

[0045] In this illustrative embodiment, the set rotational speed for the next operating segment is a constant value, and its speed curve is as follows: Figure 4 As shown, Tc is the moment when the marking detection device detects the current marking on the packaging material, Pn is the next running segment, and Vs is the standard operating speed. The area of ​​the dotted filling portion is equal to the absolute value of the position difference. This facilitates calculation, improves response speed, and thus achieves higher marking accuracy. However, it is not limited to this.

[0046] In other illustrative embodiments, the speed curve for the set rotational speed of the next running segment consists of a uniform acceleration segment and a uniform deceleration segment. The absolute values ​​of the accelerations in the uniform acceleration and deceleration segments are the same. The starting speed of the speed curve for the set rotational speed of the next running segment is the rotational speed of the longitudinal sealing roller when the marking detection device detects the current marking on the packaging material, and the ending speed is the standard operating rotational speed of the longitudinal sealing roller. For example, the speed curve... Figure 5 As shown, Tc is the moment when the marking detection device detects the current marking on the packaging material, Pn is the next running segment, and Vs is the standard operating speed. The area of ​​the dotted filling portion is equal to the absolute value of the position difference. This helps improve the smoothness of operation and avoids overload caused by excessively rapid speed changes.

[0047] The calibration method of the granule packaging machine in this illustrative embodiment obtains the current position of the longitudinal sealing roller when the calibrator detects the current calibrator on the packaging material. The position difference is obtained by subtracting the standard position of the longitudinal sealing roller corresponding to the current calibrator from the current position. The set speed of the longitudinal sealing roller for the next running segment is calculated based on the position difference. The speed adjustment of the longitudinal sealing roller can be achieved through a speed loop, which helps to improve the response speed and thus improve the calibration accuracy.

[0048] Figure 6 This is a flowchart illustrating another illustrative embodiment of the benchmarking method for granule packaging machines. The benchmarking method of this illustrative embodiment is similar to... Figure 2 The similarities and differences between the calibration methods shown will not be repeated here; the differences are described below. In this illustrative embodiment, the calibration method further includes S40 between S20 and S30: after obtaining the position difference, it is first determined whether the position difference is greater than or equal to a threshold. If the determination result is yes, then S30 is executed: the set rotational speed of the longitudinal sealing roller for the next running segment is calculated based on the position difference; if the determination result is no, then the calibration for the current calibration point ends. The threshold value can be set according to the required calibration accuracy. A larger threshold results in lower calibration accuracy and less computation, while a smaller threshold results in better calibration accuracy but more computation. This allows for a convenient trade-off between calibration accuracy and calibration cost by adjusting the threshold according to actual conditions.

[0049] This invention also provides a calibration system for a granule packaging machine. In one illustrative embodiment, the calibration system includes at least one memory and at least one processor. The at least one memory stores a computer program, and the at least one processor calls the computer program stored in the at least one memory to execute any of the calibration methods described above for the granule packaging machine. This calibration system for the granule packaging machine improves calibration response speed, thereby improving calibration accuracy.

[0050] The present invention also provides a granule packaging machine, in one illustrative embodiment of which the granule packaging machine includes a calibration system as described above. This granule packaging machine facilitates improved calibration response speed, thereby improving calibration accuracy.

[0051] The present invention also provides a computer-readable storage medium, in one illustrative embodiment of which a computer program is stored on the storage medium, the computer program being executable by a processor to implement the above-described calibration method for a granule packaging machine. This computer-readable storage medium facilitates improved calibration response speed, thereby improving calibration accuracy.

[0052] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0053] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent implementation schemes or modifications made without departing from the spirit of the present invention, such as combinations, divisions or repetitions of features, should be included within the scope of protection of the present invention.

Claims

1. A benchmarking method for granule packaging machines, characterized in that, include: The current position of the longitudinal sealing roller is obtained when the puncture detection device detects the current puncture on the packaging material. The position difference is obtained by subtracting the standard position of the longitudinal sealing roller corresponding to the current mark from the current position. as well as The set speed of the longitudinal sealing roller in the next running segment is calculated based on the position difference, so that the length difference obtained by subtracting the traction length of the longitudinal sealing roller at the set speed in the next running segment from the traction length of the longitudinal sealing roller at the standard operating speed in one running segment is equal to the position difference. The current position and the standard position are represented by the cumulative travel of a point where the longitudinal sealing roller contacts the packaging material.

2. The benchmarking method for the granule packaging machine as described in claim 1, characterized in that, The set rotational speed for the next running segment is a constant value; or The speed curve of the set rotational speed of the next running segment consists of a uniform acceleration segment and a uniform deceleration segment. The absolute values ​​of the acceleration in the uniform acceleration segment and the uniform deceleration segment are the same. The starting speed of the speed curve of the set rotational speed of the next running segment is the rotational speed of the longitudinal sealing roller when the marking detection device detects the current marking of the packaging material, and the ending speed is the standard operating rotational speed of the longitudinal sealing roller.

3. The benchmarking method for the granule packaging machine as described in claim 1, characterized in that, The position of the longitudinal sealing roller when the first puncture point is detected after the alignment begins is obtained and recorded as the initial position. The standard position of the longitudinal sealing roller corresponding to each subsequent puncture point is calculated based on the initial position and the standard spacing of the puncture points.

4. The benchmarking method for the granule packaging machine as described in claim 1, characterized in that, The starting point of the next runtime segment is the moment when the punctuation detection device detects the current punctuation on the packaging material.

5. The benchmarking method for the granule packaging machine as described in claim 1, characterized in that, The duration of one of the aforementioned operating segments is the time required for the longitudinal sealing roller to rotate one revolution at the stated standard operating speed.

6. The benchmarking method for the granule packaging machine as described in claim 1, characterized in that, The benchmarking method further includes, after obtaining the position difference, first determining whether the position difference is greater than or equal to a threshold. If the determination result is that the position difference is greater than or equal to the threshold, then the set rotation speed of the longitudinal sealing roller for the next running segment is calculated based on the position difference. If the determination result is that the position difference is less than the threshold, then the benchmarking for the current point is terminated.

7. A benchmarking system for a granule packaging machine, characterized in that, It includes at least one memory and at least one processor, the at least one memory being used to store a computer program, and the at least one processor being used to call the computer program stored in the at least one memory to execute the benchmarking method of the granule packaging machine as described in any one of claims 1 to 6.

8. A granule packaging machine, characterized in that, Includes a benchmarking system for the granule packaging machine as described in claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, The computer program can be executed by a processor to implement the benchmarking method for the granule packaging machine as described in any one of claims 1 to 6.

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