A bagging device for a paper tube packaging machine

Abstract

This application relates to a bagging device for a paper tube packaging machine, comprising a frame; a material rack shaft rotatably mounted on the frame for winding a tubular film; a gripping robot mounted on the frame for opening and pulling the film forward away from the material rack shaft; a heat-sealing assembly mounted on the frame for heat-sealing the end of the film near the material rack shaft to form the bottom of the previous packaging bag; and a cutting assembly mounted on the frame, adjacent to the heat-sealing assembly, for cutting off the portion of the opening of the next packaging bag near the bottom of the previous packaging bag. This application has the advantages of improving the bagging device's adaptability to different packaging sizes and also improving the working efficiency of the bagging device.

Description

Technical Field

[0001] This application relates to the field of paper tube packaging, and more particularly to a bagging device for a paper tube packaging machine. Background Technology

[0002] In industrial production, paper tubes are used as loading elements for various strip and linear substrates. The strip and linear substrates are wound onto the paper tubes for easy storage. After the paper tubes are produced, multiple paper tubes need to be packaged together before they can be transported to the next level of manufacturers, hence the use of paper tube packaging machines.

[0003] In related technologies, the working principle of the bag-feeding device of the paper tube packaging machine is as follows: the packaging bag in the form of a material roll is gradually fed out. During the feeding process, the bag opening is kept open, and the separation part between two adjacent packaging bags is cut off. When the packaging bag moves to the predetermined position, the paper tube can be inserted into the packaging bag.

[0004] Regarding the aforementioned technologies, there are two main problems: First, the size of each packaging bag is fixed, resulting in poor adaptability of the bagging device to different packaging sizes. Second, when cutting the dividing part between two adjacent packaging bags, it is necessary to accurately move the dividing part to the position of the cutting element and maintain the stability of the dividing part during cutting. Therefore, the packaging bags often need to be moved back and forth to adjust their position, resulting in low working efficiency of the bagging device. Summary of the Invention

[0005] In order to improve both the ability of the bagging device to adapt to different packaging sizes and the working efficiency of the bagging device, this application provides a bagging device for a paper tube baling machine.

[0006] The bagging device for a paper tube packaging machine provided in this application adopts the following technical solution: A bagging device for a paper tube packaging machine, comprising: frame; The material rack shaft is rotatably mounted on the frame and is used to wind a tubular film. A gripping robot arm, mounted on the frame, is used to open and pull the film forward away from one end of the material rack shaft; A hot melt assembly, mounted on the frame, is used to hot melt seal the end of the film near the material rack shaft to form the bottom of the previous packaging bag; A cutting assembly, mounted on the frame and adjacent to the hot-melt assembly, is used to cut off the portion of the opening of the next packaging bag near the bottom of the previous packaging bag.

[0007] By adopting the above technical solution, the gripping robot first opens and pulls the end of the film away from the material rack shaft, then moves it to the position of the heat-sealing component and the cutting component. The heat-sealing component heat-seales the film to form the bottom of the previous packaging bag, while the cutting component cuts off the part of the next packaging bag's opening near the bottom of the previous packaging bag. At this point, a packaging bag is made. Then, the gripping robot continues to pull forward to move the packaging bag to the predetermined position. Finally, a paper tube can be inserted into the packaging bag, or the packaging bag can be fitted onto a mold, thus completing the bagging process. In summary, this design method has the following advantages: First, the distance between the heat-sealing position and the opening of the film away from the material rack shaft can be changed according to different packaging size requirements, thereby producing packaging bags of different sizes. Second, errors in the position of the heat-sealing process will not affect the quality of the packaging bag, and since the cutting component is set adjacent to the heat-sealing component, the position of the cutting process will not have a large error, so no extensive adjustment work is required, thus improving the efficiency of the bagging process.

[0008] Preferably, the hot-melt assembly and the cutting assembly are combined into an integrated bag-separating assembly. The integrated bag-separating assembly includes a hot-melt lower pad, a hot-melt upper pressure block, a cutting lower pad, a cutting upper pressure block, and a downward driving component. The hot-melt lower pad is fixedly mounted on the frame, and its upper surface is used to heat the film. The hot-melt upper pressure block is vertically slidably mounted on the frame, and the hot-melt upper pressure block and the hot-melt lower pad are used to clamp the film. The cutting lower pad is fixedly mounted on the frame, and it is located on the side of the hot-melt lower pad closest to the material rack shaft. The upper surface of the cutting lower pad is provided with a cutting clearance portion. The cutting upper pressure block is vertically slidably mounted on the frame, and its lower surface is provided with a cutter. The cutter passes through the cutting clearance portion to cut the film. The downward driving component is connected to the hot-melt upper pressure block and the cutting upper pressure block, and is used to collaboratively drive the hot-melt upper pressure block and the cutting upper pressure block.

[0009] By adopting the above technical solution, compared with the method where the hot-melt component and the cutting component each have their own driving source, this design has the following advantages: First, hot-melt and cutting are achieved through a single driving source, so the distance between the hot-melt process and the cutting process can be more compact, thereby reducing the excess part at the bottom of the packaging bag; Second, hot-melt and cutting can be achieved by pressing down to close and moving up to separate in one go, thereby eliminating the mutual interference between the hot-melt process and the cutting process, and improving the working efficiency of the bagging device.

[0010] Preferably, the downward driving member is directly connected to the cutting upper pressure block, and the cutting upper pressure block is slidably connected to the hot melt upper pressure block with the relative sliding direction being vertical. Before the hot melt lower pad and the hot melt upper pressure block clamp the film, the cutter is not exposed on the lower side of the hot melt upper pressure block. After the hot melt lower pad and the hot melt upper pressure block clamp the film, the cutting upper pressure block moves downward relative to the hot melt upper pressure block to allow the cutter to enter the cutting avoidance part.

[0011] By adopting the above technical solution, compared with the fixed connection between the cutting upper pressure block and the hot-melt upper pressure block, where the cutter contacts the film first, this design ensures that during the downward movement, the hot-melt upper pressure block contacts the film, and then the cutter contacts the film. During the contact between the cutter and the film, the film will not be pulled downward by the cutter, and the original hot-melt part of the film is less likely to be displaced or deformed in the direction of the cutting position. Therefore, it can improve the smoothness of cutting, improve the accuracy of hot-melt processing, and even reduce the damage of the film after hot-melt. During the upward movement, the hot-melt upper pressure block moves downward relative to the cutting upper pressure block by its own gravity, so that the cutter is not exposed on the upper side of the hot-melt upper pressure block. Thus, higher quality hot-melt processing and cutting processing can be achieved with a single driving source.

[0012] Preferably, a pressure spring is connected between the cutting upper pressure block and the hot-melt upper pressure block. Before the hot-melt lower pad and the hot-melt upper pressure block clamp the film, the pressure spring is in a natural state. After the hot-melt lower pad and the hot-melt upper pressure block clamp the film and before the cutter enters the cutting avoidance part, the pressure spring is in a gradually compressed state.

[0013] By adopting the above technical solution, compared with the method of relying solely on the gravity of the hot melt upper pressure block to clamp the film when the cutter is not in contact with the film, this design allows the pressure spring to be compressed during the film cutting process. At this time, the elasticity of the pressure spring can further help the hot melt upper pressure block to clamp the film more firmly, making it less likely for the original hot melt part of the film to shift or deform, thereby helping to improve the quality of the hot melt process.

[0014] Preferably, a hot-melt elastic block is provided at the lower end of the hot-melt upper pressure block, and a cutting auxiliary pressure block is provided on the side of the hot-melt upper pressure block near the material rack shaft. The cutting auxiliary pressure block is provided with a cutting hole for the cutter to pass through, and an auxiliary pressure elastic block is provided on the lower surface of the cutting auxiliary pressure block. The thickness of the auxiliary pressure elastic block is less than the thickness of the hot-melt elastic block.

[0015] By adopting the above technical solution, during the downward movement, the hot melt elastic block first contacts the film, then the hot melt elastic block is gradually compressed, and then the auxiliary pressure elastic block contacts the film. At this time, the deformation degree of the auxiliary pressure elastic block is less than that of the hot melt elastic block. Therefore, while the hot melt elastic block can provide sufficient holding force to the film, it can also clamp the film at a position closer to the cutter, thereby reducing the deformation range of the film caused by cutting. In addition, while being closer to the cutter, the deformation of the auxiliary pressure elastic block will not hinder the movement of the cutter, thereby further improving the quality of the cutting process.

[0016] Preferably, a lower film-grabbing robot is fixedly installed on the side of the cutting lower pad block near the material rack shaft, and an upper film-grabbing robot is installed on the side of the cutting upper pressure block near the material rack shaft. The upper film-grabbing robot is fixedly installed on the hot melt upper pressure block, and is used to cooperate with the lower film-grabbing robot to open the bag opening of the next packaging bag when the hot melt upper pressure block and the hot melt lower pad block are separated.

[0017] By adopting the above technical solution, while the film is being heat-melted and cut, the upper and lower film-grabbing robots can hold the upper side of the film. This allows the next packaging bag to be preliminarily opened during the subsequent upward movement, making it easier for the gripping robots to grab the end of the next packaging bag away from the material rack axis, thereby improving the working efficiency of the bagging device.

[0018] Preferably, the gripping manipulator includes a gripping slide, a tensioning slide, tensioning rods, and a tensioning drive. The gripping slide is slidably mounted on the frame, and its movement direction is parallel to the film roll-out direction. The tensioning slide is slidably connected to the gripping slide, and its movement direction is parallel to the width direction of the film. Two tensioning slides are provided. The tensioning rod is mounted on the tensioning slide, and the two tensioning rods cooperate with one tensioning slide, with the two tensioning rods vertically distributed between them. The tensioning drive is connected to the two tensioning slides to move the two tensioning slides closer together or further apart.

[0019] By adopting the above technical solution, after the opening of the next packaging bag is pre-opened, the tensioning rod is first slid into the inside of the film through the material clamping slide. Then, the tensioning drive makes the two tensioning slides move away from each other until the tensioning rod presses against the inside of the film. At this time, the opening of the packaging bag is rectangular, so the opening of the subsequent packaging bag can be in a relatively stable state for the paper tube to enter or be fitted onto a mold. In addition, the tensioning rod and the film are in line contact, so the film is not easily damaged when the subsequent tensioning rod is removed from the film.

[0020] Preferably, the tensioning rod is rotatably mounted on the tensioning slide, with the axis of rotation parallel to the width direction of the film; the gripping manipulator also includes a tensioning rod drive component, which is connected to the tensioning rod and is used to switch the tensioning rod between a vertical state and a horizontal state.

[0021] By adopting the above technical solution, the tension rod is made vertical by the tension rod drive component before it enters the inner side of the film. This makes it less likely for the tension rod to puncture the film when it enters the film, thereby improving the bag production yield.

[0022] Preferably, the frame is provided with a bag-feeding mold, the bag-feeding mold is tubular, the center line of the bag-feeding mold is parallel to the film roll-out direction, the bag-feeding mold is located on the side of the hot-melt assembly and the cutting assembly away from the material rack axis, and the bag-feeding mold is for packaging bags to be fitted.

[0023] By adopting the above technical solution, due to the setting of the bag-entry mold, the packaging bag can be placed on the bag-entry mold before the paper tube enters. Therefore, the subsequent paper tubes are first inserted into the bag-entry mold and then enter the packaging bag, which allows the paper tubes to be stacked more neatly and tightly in the packaging bag.

[0024] Preferably, the bag-feeding mold is divided into an upper limit plate and a lower limit plate. Both the upper limit plate and the lower limit plate have a U-shaped bending structure. The bending openings of the upper limit plate and the lower limit plate are arranged facing each other. The lower limit plate is located inside the bending of the upper limit plate. The upper limit plate is vertically slidable, and the lower limit plate is fixedly arranged.

[0025] By adopting the above technical solution, before the packaging bag is placed on the bag-in mold, the height of the bag-in mold is reduced by the movement of the upper limit plate. Then, the packaging bag is partially placed on the bag-in mold. Then, the height of the bag-in mold is increased by the movement of the upper limit plate to tighten the packaging bag. Finally, the gripping robot arm completely places the packaging bag on the bag-in mold. Thus, the packaging bag is kept in a tensile and stable state by the bag-in mold, while also making it easy for the packaging bag to be placed on the bag-in mold. In addition, this height-adjustable structure of the bag-in mold can adapt to packaging bags of different sizes.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. First, the gripping robot opens and pulls the film forward from the end away from the material rack axis. Then, it moves to the position of the heat-sealing component and the cutting component. The heat-sealing component heat-seales the film to form the bottom of the previous packaging bag. At the same time, the cutting component cuts off the part of the next packaging bag's opening near the bottom of the previous packaging bag. At this point, a packaging bag is made. Then, the gripping robot continues to pull forward to move the packaging bag to the predetermined position. Finally, a paper tube can be inserted into the packaging bag, or the packaging bag can be placed on a mold, thus completing the bagging process. In summary, this design method has the following advantages: First, the distance between the heat-sealing position and the opening of the film away from the material rack axis can be changed according to different packaging size requirements, thereby producing packaging bags of different sizes. Second, errors in the position of the heat-sealing process will not affect the quality of the packaging bag. Since the cutting component and the heat-sealing component are set up adjacent to each other, the position of the cutting process will not have a large error, so no extensive adjustment work is required, thereby improving the efficiency of the bagging process. 2. Compared to the fixed connection between the cutting upper pressure block and the hot-melt upper pressure block, where the cutter contacts the film first, this design ensures that during the downward movement, the hot-melt upper pressure block contacts the film, and then the cutter contacts the film. This prevents the film from being pulled downwards by the cutter, thus reducing the risk of displacement and deformation of the original hot-melt portion of the film towards the cutting position. Therefore, it improves cutting smoothness, enhances the precision of the hot-melt process, and even reduces film breakage after hot-melt. During the upward movement, the hot-melt upper pressure block moves downwards relative to the cutting upper pressure block due to its own gravity, ensuring that the cutter is not exposed above the hot-melt upper pressure block. This allows for higher quality hot-melt and cutting processes with a single driving source. Attached Figure Description

[0027] Figure 1 This is an overall structural diagram of the bagging device for a paper tube packaging machine in the embodiments of this application.

[0028] Figure 2 This is a schematic diagram illustrating the specific structure of the integrated bag assembly in the embodiments of this application.

[0029] Figure 3 This is a schematic diagram in the embodiments of this application illustrating how the structure of the hot-melt upper pressure block and the cutting auxiliary pressure block clamps the film.

[0030] Figure 4 This is a schematic diagram illustrating the cooperative relationship between the upper and lower film-grabbing robotic arms and the integrated bag-separating assembly in the embodiments of this application.

[0031] Figure 5 This is a schematic diagram illustrating the specific structure of the gripping manipulator in the embodiments of this application.

[0032] Figure 6 This is a schematic diagram illustrating the specific structure of the bag-filling mold in the embodiments of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Material rack shaft; 3. Clamping robot; 31. Clamping slide; 32. Tensioning slide; 33. Tensioning rod; 34. Tensioning drive component; 35. Tensioning rod drive component; 4. Hot melt assembly; 5. Cutting assembly; 6. Integrated bag-separating assembly; 61. Hot melt lower pad block; 62. Hot melt upper pressure block; 621. Hot melt elastic block; 622. Cutting auxiliary pressure block; 623. Auxiliary pressure elastic block; 624. Upper film-grabbing robot; 63. Cutting lower pad block; 631. Cutting clearance part; 632. Lower film-grabbing robot; 64. Cutting upper pressure block; 641. Cutter; 65. Downward drive component; 7. Pressure spring; 8. Bag-entry mold; 81. Upper limit plate; 82. Lower limit plate. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses a bagging device for a paper tube packaging machine. (Refer to...) Figure 1 The bagging device for a paper tube packaging machine includes a frame 1, a material rack shaft 2, a material clamping slide 31, a gripping robot 3, a hot-melt assembly 4, and a cutting assembly 5. The material rack shaft 2 is horizontally rotated on the frame 1 by a motor drive. The material rack shaft 2 supplies film for winding, and the film is tubular. The gripping robot 3 is mounted on the frame 1. The gripping robot 3 opens and pulls the end of the film away from the material rack shaft 2. The hot-melt assembly 4 is mounted on the frame 1. The hot-melt assembly 4 performs hot-melt sealing on the end of the film near the material rack shaft 2 to form the bottom of the previous packaging bag. The cutting assembly 5 is mounted on the frame 1 and is adjacent to the hot-melt assembly 4. The cutting assembly 5 cuts off the part of the next packaged bag opening near the bottom of the previous packaging bag.

[0036] Reference Figure 1The working principle of the bagging device is as follows: First, the gripping robot 3 opens and pulls the film forward away from the end of the material rack shaft 2. Then, it moves to the position of the heat-melting component 4 and the cutting component 5. The heat-melting component 4 heats the film to form the bottom of the previous packaging bag. At the same time, the cutting component 5 cuts off the part of the opening of the next packaging bag near the bottom of the previous packaging bag. At this point, a packaging bag is made. Then, the gripping robot 3 continues to pull forward to move the packaging bag to the predetermined position. Finally, the paper tube can be inserted into the packaging bag, or the packaging bag can be placed on the... The bagging process is completed on a single mold. Based on the working principle, this design has the following advantages: First, the distance between the heat-sealing position and the end of the film away from the material rack shaft 2 can be changed according to different packaging size requirements, thus producing packaging bags of different sizes. Second, errors in the position of the heat-sealing process will not affect the quality of the packaging bag. Since the cutting component 5 is set adjacent to the heat-sealing component 4, the position of the cutting process will not have a large error, so a lot of adjustment work is not required, thereby improving the efficiency of the bagging process.

[0037] Reference Figure 1 and Figure 2 To reduce excess material at the bottom of the packaging bag and minimize interference between the heat-sealing and cutting processes, the heat-sealing component 4 and the cutting component 5 are combined into a single integrated bag-separating component 6. Heat sealing and cutting are the two functions of this integrated bag-separating component 6. Specifically, the integrated bag-separating component 6 includes a heat-sealing lower pad 61, a heat-sealing upper pressure block 62, a cutting lower pad 63, a cutting upper pressure block 64, and a downward driving component 65. The heat-sealing lower pad 61 is fixedly mounted on the frame 1, and a resistance wire is installed on its upper surface to heat the film. The heat-sealing upper pressure block 62 is vertically slidably mounted on the frame 1 and cooperates with the heat-sealing lower pad 61 to clamp the film and achieve heat sealing. The cutting lower pad 63 is fixedly mounted on the frame 1 for cutting... The lower pad 63 is located on the side of the hot melt lower pad 61 near the material rack shaft 2. The upper surface of the cutting lower pad 63 is provided with a cutting avoidance part 631. The cutting avoidance part 631 can be a groove structure or a hole structure. The cutting upper pressure block 64 is vertically slidably mounted on the frame 1. The lower surface of the cutting upper pressure block 64 is fixedly connected to a cutter 641. The cutter 641 passes through the cutting avoidance part 631 to cut the film. The downward driving member 65 is connected to the hot melt upper pressure block 62 and the cutting upper pressure block 64 to drive the hot melt upper pressure block 62 and the cutting upper pressure block 64 in a coordinated manner. In summary, hot melting and cutting are achieved by a downward pressing and upward separation. Therefore, the distance between the hot melting process and the cutting process can be more compact, and there will be no interference between the hot melting process and the cutting process.

[0038] Reference Figure 2 and Figure 3 To achieve higher quality hot-melt and cutting processes, the following settings are implemented: First, the downward drive component 65 is directly connected to the cutting upper pressure block 64. The cutting upper pressure block 64 and the hot-melt upper pressure block 62 are slidably connected, with the relative sliding direction being vertical. Simultaneously, the downward movement of the hot-melt upper pressure block 62 relative to the cutting upper pressure block 64 is restricted. Therefore, it is possible to move the cutting upper pressure block 64 and the hot-melt upper pressure block 62 upwards and downwards together. Before the hot-melt lower pad 61 and the hot-melt upper pressure block 62 clamp the film, the cutter 641 is not exposed on the underside of the hot-melt upper pressure block 62. After the film is clamped by the hot melt upper pressure block 62, the cutting upper pressure block 64 will move downward relative to the hot melt upper pressure block 62 so that the cutter 641 enters the cutting avoidance part 631 to complete the cutting process. Therefore, the working sequence of clamping the film first and then cutting is formed. During the process of the cutter 641 contacting the film, the film will not be pulled down by the cutter 641, and the original hot melt part of the film is less likely to be displaced and deformed in the direction of the cutting position. Therefore, it can improve the smoothness of cutting, improve the accuracy of hot melt processing, and even reduce the damage of the film after hot melt, thereby achieving higher quality hot melt processing and cutting processing.

[0039] Reference Figure 2 and Figure 3 Secondly, a pressure spring 7 is connected between the cutting upper pressure block 64 and the hot-melt upper pressure block 62. One end of the pressure spring 7 is fixedly connected to the cutting upper pressure block 64, and the other end is fixedly connected to the hot-melt upper pressure block 62. Before the hot-melt lower pad 61 and the hot-melt upper pressure block 62 clamp the film, the pressure spring 7 is in a natural state. After the hot-melt lower pad 61 and the hot-melt upper pressure block clamp the film and before the cutter 641 enters the cutting avoidance part 631, the pressure spring 7 is gradually compressed. The elastic force of the pressure spring 7 can be used to make the hot-melt upper pressure block 62 clamp the film more stably, so that the original hot-melt part of the film is less likely to be displaced or deformed, thereby helping to improve the quality of the hot-melt process.

[0040] Reference Figure 2 and Figure 3Thirdly, a hot-melt elastic block 621 is provided at the lower end of the hot-melt upper pressure block 62. A cutting auxiliary pressure block 622 is also fixed on the side of the hot-melt upper pressure block 62 near the material rack shaft 2. The cutting auxiliary pressure block 622 has a cutting hole for the cutter 641 to pass through. An auxiliary pressure elastic block 623 is fixedly connected to the lower surface of the cutting auxiliary pressure block 622. The auxiliary pressure elastic blocks 623 are evenly distributed along the length of the cutting hole, and the auxiliary pressure elastic blocks 623 are located near the opening of the cutting hole. If the thickness of the auxiliary pressure elastic block 623 is less than the thickness of the hot melt elastic block 621, then when the auxiliary pressure elastic block 623 contacts the film, the deformation of the auxiliary pressure elastic block 623 is less than that of the hot melt elastic block 621. Therefore, while the hot melt elastic block 621 can provide sufficient holding force to the film, it can also clamp the film at a position closer to the cutter 641 to reduce the deformation range of the film caused by cutting. In addition, the deformation of the auxiliary pressure elastic block 623 will not block the cutting hole, thereby further improving the quality of the cutting process.

[0041] Reference Figure 2 and Figure 4 After cutting and heat-melting, the opening of the next packaging bag is not open. Therefore, in order to facilitate the gripping robot 3 to open the end of the film away from the material rack shaft 2, a pre-opening process is performed after cutting and heat-melting. Specifically, a lower film gripping robot 632 is fixedly installed on the side of the cutting lower pad 63 near the material receiving shaft. The lower film gripping robot 632 has a mechanical gripper structure. An upper film gripping robot 624 is set on the side of the cutting upper pressure block 64 near the material rack block. The upper film gripping robot 624 is fixedly installed on the heat-melting upper pressure block 62. The upper film gripping robot 624 also has a mechanical gripper structure. When the heat-melting upper pressure block 62 and the heat-melting lower pad 61 are closed, the lower film gripping robot 632 will hold the lower side of the film, and the upper film gripping robot 624 will hold the upper side of the film. When the heat-melting upper pressure block 62 and the heat-melting lower pad 61 are separated, the end of the film away from the material rack shaft 2 will be pre-opened.

[0042] Reference Figure 1 and Figure 5 To enable the gripping robot 3 to move the film forward with the bag opening tensioned, the gripping robot 3 includes a gripping slide 31, a tensioning slide 32, a tensioning rod 33, and a tensioning drive 34. The gripping slide 31 is horizontally slidably mounted on the frame 1, and the movement direction of the gripping slide 31 is parallel to the film roll-out direction. The tensioning slide 32 is slidably connected to the gripping slide 31, and the movement direction of the tensioning slide 32 is parallel to the width direction of the film. There are two tensioning slides 32. The tensioning rods 33 are mounted on the tensioning slides 32, with one tensioning slide 32 corresponding to two tensioning rods 33, and the two tensioning rods 33 are vertically distributed between them. The tensioning drive 34 is mounted on the gripping slide 31 and is connected to the two tensioning slides 32. The tensioning drive 34 is used to move the two tensioning slides 32 closer to each other or further apart.

[0043] Reference Figure 1 and Figure 5 After the opening of the next packaging bag is pre-opened, the tensioning rod 33 is first slid into the inside of the film by the clamping slide 31. Then, the tensioning drive 34 moves the two tensioning slides 32 away from each other until the tensioning rod 33 presses against the inside of the film. At this time, the opening of the packaging bag is rectangular, so the opening of the subsequent packaging bag can be in a relatively stable state for the paper tube to enter or be fitted onto a mold. In addition, the tensioning rod 33 and the film are in line contact, so the film is not easily damaged when the tensioning rod 33 is removed from the film.

[0044] Reference Figure 1 and Figure 5 To prevent the film from being punctured when the tensioning rod 33 enters the inner side of the film, the tensioning rod 33 is rotatably mounted on the tensioning slide 32, with the rotation axis parallel to the width direction of the film. The gripping robot 3 also includes a tensioning rod drive 35, which is connected to the tensioning rod 33. The tensioning rod drive 35 uses a motor and a linkage structure to switch the tensioning rod 33 between a vertical and a horizontal state. Therefore, before the tensioning rod 33 enters the inner side of the film, it can be in a vertical state, and after entering the inner side of the film, it can be in a horizontal state, thus reducing the risk of puncturing the film and improving the bag-making yield.

[0045] Reference Figure 1 and Figure 6 In order to make the paper tubes stack more neatly and tightly in the packaging bag, the packaging bag needs to be kept in a tensile and stable state by a mold. Specifically, the frame 1 is equipped with a bag entry mold 8, which is tubular and has its center line parallel to the film roll-out direction. The bag entry mold 8 is located on the side of the integrated bag separating assembly 6 away from the material rack shaft 2. After the packaging bag is made, the gripping robot 3 will put the packaging bag on the bag entry mold 8. Then the subsequent paper tubes will be inserted into the bag entry mold 8 first, and then enter the packaging bag. Therefore, the purpose of stacking the paper tubes more neatly and tightly can be achieved with the help of the bag entry mold 8.

[0046] Reference Figure 1 and Figure 6Because the packaging bag is in a tense and stable state on the bag-feeding mold 8, the bag-feeding mold 8 is divided into an upper limit plate 81 and a lower limit plate 82 to facilitate the bag being fitted onto the mold. Both the upper limit plate 81 and the lower limit plate 82 have a U-shaped bending structure. The upper limit plate 81 and the lower limit plate 82 are set facing each other, and the lower limit plate 82 is located inside the upper limit plate 81. The upper limit plate 81 is vertically slidable, while the lower limit plate 82 is fixed. Before the packaging bag is fitted onto the bag-feeding mold 8, the height of the bag-feeding mold 8 is reduced by the movement of the upper limit plate 81. Then, the packaging bag is partially fitted onto the bag-feeding mold 8. Then, the height of the bag-feeding mold 8 is increased by the movement of the upper limit plate 81 to tighten the packaging bag. Finally, the gripping robot 3 completely fits the packaging bag onto the bag-feeding mold 8, thereby achieving the purpose of facilitating the bag being fitted onto the bag-feeding mold 8. In addition, the variable height of the bag-feeding mold 8 can also adapt to packaging bags of different sizes.

[0047] The implementation principle of a bagging device for a paper tube packaging machine according to an embodiment of this application is as follows: First, the gripping robot 3 opens and pulls the film forward away from the end of the material rack shaft 2, then moves it to the position of the heat-melting component 4 and the cutting component 5. The heat-melting component 4 heat-melts the film to form the bottom of the previous packaging bag, while the cutting component 5 cuts off the part of the next packaging bag's opening near the bottom of the previous packaging bag. At this point, a packaging bag is made. Then, the gripping robot 3 continues to pull forward to move the packaging bag to the predetermined position, and finally, the paper tube can be inserted. The packaging bag is either placed on a mold or the packaging bag is fitted onto it to complete the bagging process. From the working process, we can conclude that: First, the distance between the heat-sealing position and the end of the film away from the material rack shaft 2 can be changed according to different packaging size requirements, so that packaging bags of different sizes can be produced; Second, errors in the position of the heat-sealing process will not affect the quality of the packaging bag. Since the cutting component 5 is set adjacent to the heat-sealing component 4, the position of the cutting process will not have a large error, so there is no need to make a lot of adjustments, thereby improving the efficiency of the bagging process.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A bagging device for a paper tube packaging machine, characterized in that: include: Rack (1); The material rack shaft (2) is rotatably mounted on the frame (1) and is used to wind up a tubular film. A gripping manipulator (3) is mounted on the frame (1) and is used to open and pull the film forward away from one end of the material rack shaft (2); A hot melt assembly (4) is set on the frame (1) and is used to hot melt seal the end of the film near the material rack shaft (2) to form the bottom of the previous packaging bag; A cutting assembly (5) is provided on the frame (1). The cutting assembly (5) is provided adjacent to the hot melt assembly (4) and is used to cut off the part of the opening of the next packaging bag that is close to the bottom of the previous packaging bag. The hot-melt assembly (4) and the cutting assembly (5) are combined into an integrated bag-separating assembly (6). The integrated bag-separating assembly (6) includes a hot-melt lower pad (61), a hot-melt upper pressure block (62), a cutting lower pad (63), a cutting upper pressure block (64), and a downward driving component (65). The hot-melt lower pad (61) is fixedly mounted on the frame (1), and its upper surface is used to heat the film. The hot-melt upper pressure block (62) is vertically slidably mounted on the frame (1), and the hot-melt upper pressure block (62) and the hot-melt lower pad (61) are used to clamp the film. The cutting lower pad (63) is fixedly mounted on the frame (1). The cutting lower pad (63) is located on the side of the hot melt lower pad (61) near the material rack shaft (2), and the upper surface of the cutting lower pad (63) is provided with a cutting clearance part (631); the cutting upper pressure block (64) is vertically slidably disposed on the frame (1), and the lower surface of the cutting upper pressure block (64) is provided with a cutter (641), which passes through the cutting clearance part (631) to cut the film; the downward driving member (65) is connected to the hot melt upper pressure block (62) and the cutting upper pressure block (64) to drive the hot melt upper pressure block (62) and the cutting upper pressure block (64) in a coordinated manner; A lower film-grabbing robot (632) is fixedly installed on the side of the cutting lower pad block (63) near the material rack shaft (2), and an upper film-grabbing robot (624) is installed on the side of the cutting upper pressure block (64) near the material rack shaft (2). The upper film-grabbing robot (624) is fixedly installed on the hot melt upper pressure block (62) and is used to cooperate with the lower film-grabbing robot (632) and the upper film-grabbing robot (624) to open the bag opening of the next packaging bag when the hot melt upper pressure block (62) is separated from the hot melt lower pad block (61). The gripping manipulator (3) includes a gripping slide (31), a tensioning slide (32), a tensioning rod (33), and a tensioning drive (34). The gripping slide (31) is slidably mounted on the frame (1), and the movement direction of the gripping slide (31) is parallel to the film roll-out direction. The tensioning slide (32) is slidably connected to the gripping slide (31), and the movement direction of the tensioning slide (32) is parallel to the width direction of the film. There are two tensioning slides (32). The tensioning rod (33) is mounted on the tensioning slide (32), and the two tensioning rods (33) cooperate with one tensioning slide (32). The two tensioning rods (33) are vertically distributed between them. The tensioning drive (34) is connected to the two tensioning slides (32) and is used to move the two tensioning slides (32) closer to each other or further apart.

2. The bagging device for a paper tube packaging machine according to claim 1, characterized in that: The downward driving member (65) is directly connected to the cutting upper pressure block (64). The cutting upper pressure block (64) is slidably connected to the hot melt upper pressure block (62), and the relative sliding direction is vertical. Before the hot melt lower pad (61) and the hot melt upper pressure block (62) clamp the film, the cutter (641) is not exposed on the lower side of the hot melt upper pressure block (62). After the hot melt lower pad (61) and the hot melt upper pressure block (62) clamp the film, the cutting upper pressure block (64) moves downward relative to the hot melt upper pressure block (62) to allow the cutter (641) to enter the cutting avoidance part (631).

3. The bagging device for a paper tube packaging machine according to claim 2, characterized in that: A pressure spring (7) is connected between the cutting upper pressure block (64) and the hot melt upper pressure block (62). Before the hot melt lower pad (61) and the hot melt upper pressure block (62) clamp the film, the pressure spring (7) is in a natural state. After the hot melt lower pad (61) and the hot melt upper pressure block (62) clamp the film and before the cutter (641) enters the cutting avoidance part (631), the pressure spring (7) is in a gradually compressed state.

4. The bagging device for a paper tube packaging machine according to claim 2, characterized in that: A hot melt elastic block (621) is provided at the lower end of the hot melt upper pressure block (62). A cutting auxiliary pressure block (622) is provided on the side of the hot melt upper pressure block (62) near the material rack shaft (2). The cutting auxiliary pressure block (622) is provided with a cutting hole for the cutter (641) to pass through. An auxiliary pressure elastic block (623) is provided on the lower surface of the cutting auxiliary pressure block (622). The thickness of the auxiliary pressure elastic block (623) is less than the thickness of the hot melt elastic block (621).

5. The bagging device for a paper tube packaging machine according to claim 1, characterized in that: The tensioning rod (33) is rotatably mounted on the tensioning slide (32), with the rotation axis parallel to the width direction of the film; the gripping manipulator (3) also includes a tensioning rod drive (35), which is connected to the tensioning rod (33) and is used to switch the tensioning rod (33) between a vertical state and a horizontal state.

6. The bagging device for a paper tube packaging machine according to claim 1, characterized in that: The frame (1) is provided with a bag-feeding mold (8), which is tubular and has a center line parallel to the film roll-out direction. The bag-feeding mold (8) is located on the side of the hot melt assembly (4) and the cutting assembly (5) away from the material rack shaft (2). The bag-feeding mold (8) is used for packaging bags.

7. The bagging device for a paper tube packaging machine according to claim 6, characterized in that: The bag-filling mold (8) is divided into an upper limit plate (81) and a lower limit plate (82). Both the upper limit plate (81) and the lower limit plate (82) have a U-shaped bending structure. The bending openings of the upper limit plate (81) and the lower limit plate (82) are arranged facing each other. The lower limit plate (82) is located inside the bending of the upper limit plate (81). The upper limit plate (81) is vertically slidable, and the lower limit plate (82) is fixedly set.

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