Automatic splicing device with constant tension control

Abstract

The present invention relates to the technical field of wet tissue production equipment, and in particular to an automatic docking device with constant tension control, the automatic docking device comprising a frame and two rolls, both of which are provided with packaging film rolls, the packaging film rolls on the two rolls being defined as A roll and B roll respectively; a docking assembly and a traction mechanism are also provided on the frame, the docking assembly is provided with an A roll cutting mechanism and a B roll cutting mechanism, both the A roll cutting mechanism and the B roll cutting mechanism are provided with a docking position; the traction mechanism is located at the front side of the B roll, the traction mechanism is used to pull the A roll and the B roll for alternating transportation; the device also comprises an adsorption member, which is arranged at the docking position; two power mechanisms, the two power mechanisms are respectively connected to the two rolls to drive the two rolls to rotate and feed; a first tension controller, a second tension controller and a material storage buffer device, the present invention effectively solves the technical problem of a long overlapping portion when the A roll and the B roll are docked in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of wet tissue production equipment, and in particular to an automatic splicing device with constant tension control. Background Art

[0002] When producing the packaging film for wet wipes, the material is fed by the packaging film roll on the reel. In the traditional wet wipe production line, there is only one reel. After use, the machine needs to be stopped and a new packaging film roll needs to be added to the reel. This is not only labor-intensive and time-consuming, but also reduces the production efficiency of wet wipes.

[0003] In order to improve this situation, the number of rolls is increased to two, and the packaging film rolls on the two rolls are defined as roll A and roll B respectively. A docking assembly is arranged between roll A and roll B, and the docking assembly has a roll A cutting mechanism corresponding to roll A and a roll B cutting mechanism corresponding to roll B. Roll A is used as the main roll and roll B is used as the spare roll. When in use, roll A is first connected to the traction device. Under the traction of the traction device, after roll A is used up, the end of roll A reaches the docking assembly, and the head end of roll B is waiting at the docking assembly. The roll A cutting mechanism on the docking assembly cuts roll A The end is cut off from the reel of roll A. At the same time, since double-sided tape has been arranged on roll B, the end of roll A is bonded to roll B to complete the connection. The traction device immediately starts to pull the packaging film of roll B for production. At this time, the staff can replenish roll A to the reel where roll A is located. When roll B is used up, the end of roll B is bonded to the head end of roll A by using the docking assembly and the B roll cutting structure. This cycle is repeated. Using the docking assembly, rolls A and B are continuously connected to the traction device for production without stopping, which greatly improves the production efficiency of wet tissue packaging film.

[0004] However, with the use of the above-mentioned docking assembly, some problems have gradually been discovered. For example, take the docking of roll A 3 on roll B 4, where double-sided adhesive tape 30 is adhered to roll B 4. Since the reels where roll A 3 and roll B 4 are located do not stop during the docking process, in order to ensure the stability of the docking, the double-sided adhesive tape 30 is usually arranged at the inner side of the head end of roll B 4, such as Figure 1 As shown, although the stable bonding of roll A 3 and roll B 4 is ensured, there are more overlapping parts between roll A 3 and roll B 4, which causes waste on the one hand, and on the other hand, the overlapping part of roll A 3 and roll B 4 is not only uneven but also longer than the normal position. When processing in subsequent work sections, sensors are used, and errors will appear when detecting the overlapping part of roll A and roll B compared with the normal position. The longer the length of the overlapping part, the greater the error, which affects the detection and judgment of subsequent processes. Summary of the invention

[0005] In view of this, an object of the present invention is to provide an automatic splicing device with constant tension control, so as to solve the technical problem of a long overlap portion when the A roll and the B roll are spliced ​​in the prior art.

[0006] To achieve the above purpose, the automatic docking device with constant tension control provided by the present invention adopts the following technical solutions:

[0007] An automatic docking device with constant tension control comprises a frame and two rolls, both of which are equipped with packaging film rolls, and the packaging film is defined to be transported from back to front. The two rolls are arranged at intervals in the front-to-back direction and are both rotatably mounted on the frame, and in the direction from back to front, the packaging film rolls on the two rolls are defined as A roll and B roll respectively; a docking assembly and a traction mechanism are also provided on the frame, the docking assembly is located between the A roll and the B roll, and the docking assembly has an A roll cutting mechanism corresponding to the A roll and a B roll cutting mechanism corresponding to the B roll, and both the A roll cutting mechanism and the B roll cutting mechanism have a docking position for providing a docking position for the A roll and the B roll; the traction mechanism is located in front of the B roll, and the traction mechanism is used to pull the A roll and the B roll for alternate transportation; it is characterized in that it also includes:

[0008] A suction piece, which is arranged at the docking position, wherein the suction piece in the A roll cutting mechanism is used to suction the tail end of the A roll to dock with the B roll, and the suction piece in the B roll cutting mechanism is used to suction the tail end of the B roll to dock with the A roll;

[0009] Two power mechanisms, the two power mechanisms are respectively connected to the two reels to drive the two reels to rotate and feed the materials;

[0010] A first tension controller, which is arranged on the frame and is used for the packaging film on the A roll to bypass so as to control the transmission tension of the A roll;

[0011] A second tension controller, which is arranged on the frame and is used for the packaging film on the B roll to bypass so as to control the transmission tension of the B roll;

[0012] The material storage cache device is arranged on the frame and located between the B roll and the traction mechanism. The packaging film is stored on the material storage cache device. The material storage cache device is used to replenish the packaging film to the traction mechanism in time when the A roll and the B roll are stopped for docking.

[0013] The automatic splicing device with constant tension control provided by the present invention has the following beneficial effects: when working, the power mechanism is started, and roll A is first driven by the traction mechanism to transport the packaging film from the back to the front, and the transmission tension is controlled by the first tension controller. The head end of roll B is no longer bonded with double-sided tape, but a transparent tape is set, and the area of ​​the transparent tape bonded to roll B is half of that of the transparent tape, and the head end of roll B is adsorbed at the docking position by the adsorption member; when roll A is about to be used up, the tail end of roll A reaches the docking position, and after roll A is cut off by the roll A cutting mechanism, the tail end of roll A is connected to the docking position under the action of the docking assembly. The head ends of the B rolls are aligned, and the power mechanisms corresponding to the A rolls and B rolls are stopped. After the tail end of the A roll is bonded to the other half of the transparent tape, the connection is completed. At this time, the A rolls and the B rolls are started again. Since half of the transparent tape is bonded to the B roll and the other half is bonded to the A roll, in order to ensure stable bonding, on the one hand, the head end of the B roll is stably adsorbed at the connection position by the adsorption member to avoid the head end of the B roll being in a floating free state as in the prior art. On the other hand, the shutdown process makes the tail end of the A roll stably bonded to the head end of the B roll. After the connection, the length of the overlapped part of the A roll and the B roll is greatly reduced.

[0014] At the same time, the material storage and buffering equipment is used to replenish the packaging film to the traction mechanism in time when the power mechanism of roll A and roll B stops, so that the entire production line is still in the process of uninterrupted operation, ensuring production efficiency;

[0015] In summary, the uniqueness of this device is that it utilizes adsorption parts and shutdown processing to effectively reduce the overlap of roll A and roll B while improving the stability of the connection. At the same time, the material storage and buffering equipment enables the entire production line to work uninterruptedly, effectively ensuring production efficiency. After the overlap of roll A and roll B is effectively reduced, materials are saved and waste is avoided, and the errors in subsequent process detection and judgment are reduced, effectively solving the technical problem of the long overlap of roll A and roll B when connecting in the prior art.

[0016] Furthermore, the docking assembly includes a box body, which is fixed on the frame, and the A roll cutting mechanism and the B roll cutting mechanism are arranged relatively in the front-to-back direction in the box body, and a pad knife seat is arranged in the box body and is located between the A roll cutting mechanism and the B roll cutting mechanism; the A roll cutting mechanism and the B roll cutting mechanism both include a clamping plate arranged on the top and a docking plate arranged on the bottom, and also include a cutter arranged between the clamping plate and the docking plate, the clamping plate is used to cooperate with the pad knife seat on the upper side to clamp the packaging film in the A roll or the B roll, and the two docking plates are used to cooperate on the lower side to dock the A roll and the B roll after docking, wherein the docking position is formed on one side of each docking plate facing the other docking plate; the A roll cutting mechanism and the B roll cutting mechanism both include a control component for controlling the clamping plate to approach and move away from the pad knife seat, and controlling its own docking plate to approach or move away from the other docking plate.

[0017] Furthermore, the A-roll cutting mechanism includes a first cylinder with an output end facing the knife pad seat, a mounting plate supported at the lower end of the first cylinder, the mounting plate fixed on the frame, a folding plate connected to the output end of the first cylinder, a direction perpendicular to the front-rear direction in the horizontal plane is defined as the left-right direction, the folding plate extends in the left-right direction, the cutter is fixed on the folding plate and connected to the clamping plate through a connecting rod, the A-roll cutting mechanism also includes a second cylinder, the second cylinder is arranged at the lower side of the frame, the output end of the second cylinder is connected to the docking plate, the first cylinder and the second cylinder constitute the control assembly. The first cylinder controls the actions of the cutter and the clamping plate at the same time, and the synchronization of the cutter and the clamping plate is better.

[0018] Furthermore, the B roll cutting mechanism is the same as the A roll cutting mechanism, and accordingly also has a first cylinder, a folding plate, and a second cylinder.

[0019] Furthermore, a guide seat is fixed on the mounting plate, and the folding plate is connected with a guide shaft passing through the guide seat, thereby effectively improving the stability of the movement of the folding plate.

[0020] Furthermore, one end of the connecting rod is connected to the clamping plate, and the other end passes through the folding plate, and a spring is sleeved on the portion of the connecting rod between the clamping plate and the folding plate. Under the action of the spring force, the clamping plate is reset faster.

[0021] Furthermore, the adsorption component includes an adsorption plate fixed on the docking plate, and a side of the docking plate facing away from the adsorption plate has a negative pressure mechanism for providing negative pressure adsorption force for the adsorption plate.

[0022] Further, the traction device includes a traction roller, the material storage cache device includes a lower roller group and an upper roller group, the lower roller group includes two rows of lower rollers, the two rows of lower rollers are arranged at intervals along the front-to-back direction, the rear row is a fixed row, and the front row is a movable row, and the material storage cache device also includes a driving mechanism for driving the movable row to move forward and backward to adjust the feeding;

[0023] The upper roller group includes two upper rollers arranged at intervals in the left-right direction. The packaging film of the A roll or B roll is interlaced along the fixed row and the movable row, and then transported to the traction roller after passing through the two upper rollers. When the power mechanism stops, the driving mechanism operates to adjust the movable row away from the fixed row, but after the docking is completed, the driving mechanism drives the movable row to reset. Due to the existence of the first tension controller and the second tension controller, the tension of the packaging film between the fixed row and the movable row can be restored to the level before the power mechanism stops by adjusting the first tension controller or the second tension controller.

[0024] Furthermore, the driving mechanism comprises a horizontally arranged transverse cylinder, which is arranged on a side of the frame facing away from the traction mechanism, and an output end of the transverse cylinder is connected to the movable row.

[0025] Furthermore, the power mechanism is a motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the connection between A roll, B roll and double-sided tape in the prior art;

[0027] Figure 2 The present invention provides a three-dimensional schematic diagram of the automatic docking device with constant tension control Figure 1 ;

[0028] Figure 3 The present invention provides a three-dimensional schematic diagram of the automatic docking device with constant tension control Figure 2 ;

[0029] Figure 4 The present invention provides a three-dimensional schematic diagram of the automatic docking device with constant tension control Figure 3 ;

[0030] Figure 5 It is a front view of the automatic docking device with constant tension control provided by the present invention;

[0031] Figure 6 is a schematic diagram of a docking assembly provided by the present invention;

[0032] Figure 7 is a three-dimensional schematic diagram of the docking assembly provided by the present invention (a schematic diagram showing the interior of the box, without showing the spring);

[0033] Figure 8 It is a schematic diagram of the connection of the A roll, the B roll and the transparent tape in the present invention.

[0034] Numbers in the figure: 1. Frame; 2. Reel; 3. A roll; 4. B roll; 5. Docking assembly; 6. Traction mechanism; 8. Power mechanism; 9. First tension controller; 10. Second tension controller; 11. Material storage buffer device; 12. Box; 13. Knife pad seat; 14. Docking plate; 15. Cutter; 16. First cylinder; 17. Mounting plate; 18. Folding plate; 19. Clamping plate; 20. Connecting rod; 22. Guide seat; 23. Guide shaft; 24. Spring; 25. Adsorption plate; 26. Traction roller; 27. Fixed row; 28. Movable row; 29. ​​Upper roller; 30. Double-sided tape; 31. Transparent tape. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0036] like Figures 2 to 4 As shown, an automatic docking device with constant tension control comprises a frame 1 and two reels 2, on which packaging film rolls are mounted, and the packaging film is defined to be transported from back to front. The two reels 2 are arranged at intervals in the front-to-back direction and are both rotatably mounted on the frame 1, and in the direction from back to front, the packaging film rolls on the two reels 2 are defined as A roll 3 and B roll 4 respectively; a docking assembly 5 and a traction mechanism 6 are also provided on the frame 1, and the docking assembly 5 is located between the A roll 3 and the B roll 4, and the docking assembly 5 has an A roll cutting mechanism corresponding to the A roll 3 and a B roll cutting mechanism corresponding to the B roll 4, and the A roll cutting mechanism and the B roll cutting mechanism both have a docking position for providing a docking position for the A roll 3 and the B roll 4; the traction mechanism 6 is located in front of the B roll 4, and the traction mechanism 6 is used to pull the A roll 3 and the B roll 4 for alternate transportation; it is characterized in that it also includes:

[0037] The adsorption member is arranged at the docking position, wherein the adsorption member in the A roll cutting mechanism is used to adsorb the tail end of the A roll 3 to dock with the B roll 4, and the adsorption member in the B roll cutting mechanism is used to adsorb the tail end of the B roll 4 to dock with the A roll 3;

[0038] Two power mechanisms 8, the two power mechanisms 8 are respectively connected to the two reels 2 to drive the two reels 2 to rotate and feed;

[0039] A first tension controller 9, which is disposed on the frame 1 and is used for the packaging film on the A roll 3 to bypass so as to control the transmission tension of the A roll 3;

[0040] A second tension controller 10, which is disposed on the frame 1 and is used for the packaging film on the B roll 4 to bypass so as to control the transmission tension of the B roll 4;

[0041] The material storage cache device 11 is arranged on the frame 1 and is located between the B roll 4 and the traction mechanism 6. The packaging film is stored on the material storage cache device 11. The material storage cache device 11 is used to replenish the packaging film to the traction mechanism 6 in time when the A roll 3 and the B roll 4 are stopped for docking.

[0042] In this embodiment, the power mechanism 8 is a motor. In other embodiments, the power mechanism may also be a direct-acting cylinder, and the output end of the direct-acting cylinder is connected to the reel through a crank-connecting rod structure to convert the linear motion of the direct-acting cylinder into the rotational motion of the reel.

[0043] like Figures 5 to 7 As shown, the docking assembly 5 includes a box body 12, which is fixed on the frame 1, and the A roll cutting mechanism and the B roll cutting mechanism are relatively arranged in the box body 12 along the front-to-back direction, and a pad knife seat 13 is arranged in the box body 12 and is located between the A roll cutting mechanism and the B roll cutting mechanism; the A roll cutting mechanism and the B roll cutting mechanism both include a clamping plate 19 arranged on the top and a docking plate 14 arranged on the bottom, and also include a cutter 15 arranged between the clamping plate 19 and the docking plate 14, the clamping plate 19 is used to cooperate with the pad knife seat 13 on the upper side to clamp the packaging film in the A roll 3 or the B roll 4, and the two docking plates 14 are used to cooperate with the docking of the A roll 3 and the B roll 4 on the lower side after docking, wherein the docking position is formed on one side of each docking plate 14 facing the other docking plate 14; the A roll cutting mechanism and the B roll cutting mechanism both include a control component for controlling the clamping plate 19 to approach and move away from the pad knife seat 13, and controlling its own docking plate 14 to approach or move away from the other docking plate 14.

[0044] Specifically, the A-roll cutting mechanism includes a first cylinder 16 with an output end facing the knife pad seat 13, a mounting plate 17 supported at the lower end of the first cylinder 16, the mounting plate 17 is fixed on the frame 1, the output end of the first cylinder 16 is connected to a folding plate 18, the direction perpendicular to the front-back direction in the horizontal plane is defined as the left-right direction, the folding plate 18 extends in the left-right direction, the cutter 15 is fixed on the folding plate 18 and the clamping plate 19 is connected through a connecting rod 20, the A-roll cutting mechanism also includes a second cylinder (not shown in the figure), the second cylinder is arranged at the lower side of the frame 1, the output end of the second cylinder is connected to the docking plate 14, and the first cylinder 16 and the second cylinder constitute the control component. The first cylinder 16 controls the actions of the cutter 15 and the clamping plate 19 at the same time, and the synchronization of the cutter 15 and the clamping plate 19 is better. In other implementations, two cylinders can be provided to control the actions of the cutter and the clamping plate respectively.

[0045] In this embodiment, the B roll cutting mechanism is the same as the A roll cutting mechanism, and accordingly also has the first cylinder 16, the folding plate 18, and the second cylinder. In other embodiments, the B roll cutting mechanism and the A roll cutting mechanism may also be different, for example, in the A roll cutting mechanism, the first cylinder simultaneously controls the movement of the cutter and the clamping plate, and in the B roll cutting mechanism, two cylinders may be provided to control the movement of the cutter and the clamping plate 19 respectively.

[0046] like Figure 7As shown, a guide seat 22 is fixed on the mounting plate 17, and the folding plate 18 is connected to a guide shaft 23 passing through the guide seat 22. The stability of the movement of the folding plate 18 is effectively improved. In addition, one end of the connecting rod 20 is connected to the clamping plate 19, and the other end passes through the folding plate 18, and the part of the connecting rod 20 located between the clamping plate 19 and the folding plate 18 is covered with a spring 24. Under the elastic force of the spring 24, the clamping plate 19 is reset faster. In other embodiments, the spring may not be provided.

[0047] In this embodiment, the adsorption member includes an adsorption plate 25 fixed on the docking plate 14, and the side of the docking plate 14 facing away from the adsorption plate 25 has a negative pressure mechanism (not shown in the figure) that provides negative pressure adsorption force for the adsorption plate 25. In other embodiments, the adsorption member may also be an electrically powered suction cup.

[0048] like Figures 2 to 5 As shown, the traction device includes a traction roller 26, the material storage cache device 11 includes a lower roller group at the bottom and an upper roller group at the top, the lower roller group includes two rows of lower rollers, and the two rows of lower rollers are arranged at intervals along the front-to-back direction, wherein the rear row is a fixed row 27, and the front row is a movable row 28, and the material storage cache device 11 also includes a driving mechanism for driving the movable row 28 to move forward and backward to adjust the feeding;

[0049] The upper roller group includes two upper rollers 29 arranged at intervals in the left-right direction. The packaging film of the A roll 3 or the B roll 4 is interlaced along the fixed row 27 and the movable row 28, and then transported to the traction roller 26 after passing through the two upper rollers 29. When the power mechanism 8 stops, the driving mechanism is activated to adjust the movable row 28 away from the fixed row 27, but after the docking is completed, the driving mechanism drives the movable row 28 to reset. Due to the existence of the first tension controller 9 and the second tension controller 10, the tension of the packaging film between the fixed row 27 and the movable row 28 can be restored to the level before the power mechanism 8 stops by adjusting the first tension controller 9 or the second tension controller 10.

[0050] Specifically, the driving mechanism includes a horizontally arranged transverse cylinder (not shown in the figure), which is arranged on the side of the frame 1 facing away from the traction mechanism 6, and the output end of the transverse cylinder is connected to the movable row 28. In other embodiments, the transverse cylinder can also be replaced by a servo electric cylinder.

[0051] The working principle of the automatic docking device with constant tension control provided by the present invention is as follows: when working, the power mechanism 8 is started, and the A roll 3 is first driven by the traction mechanism 6 to transport the packaging film from the back to the front, and the transmission tension is controlled by the first tension controller 9. The head end of the B roll 4 can no longer be bonded with the double-sided tape 30, but a transparent tape 31 is set, and the area of ​​the transparent tape 31 bonding the B roll 4 is half of the transparent tape 31, and the head end of the B roll 4 is adsorbed at the docking position by the adsorption member; when the A roll 3 is about to be used up, the tail end of the A roll 3 reaches the docking position, and after the A roll cutting mechanism cuts off the A roll 3, under the action of the docking component 5, the tail end of the A roll 3 and The head ends of the B roll 4 are aligned, and the power mechanisms 8 corresponding to the A roll 3 and the B roll 4 are all stopped. After the tail end of the A roll 3 is bonded to the other half of the transparent tape 31, the docking is completed. At this time, the A roll 3 and the B roll 4 are started again. Since half of the transparent tape 31 is bonded to the B roll 4 and the other half is bonded to the A roll 3, in order to ensure stable bonding, on the one hand, the head end of the B roll 4 is stably adsorbed at the docking position by the adsorption member to avoid the head end of the B roll 4 being in a floating free state as in the prior art. On the other hand, the shutdown process makes the tail end of the A roll 3 firmly bonded to the head end of the B roll 4. After the docking, the length of the overlapping part of the A roll 3 and the B roll 4 is greatly reduced;

[0052] At the same time, the material storage buffer device 11 is used to replenish the packaging film to the traction mechanism 6 in time when the power mechanism 8 of the A roll 3 and the B roll 4 stops, so that the entire production line is still in the process of uninterrupted operation, ensuring production efficiency;

[0053] In summary, the uniqueness of this device is that it utilizes adsorption parts and shutdown processing to effectively reduce the overlapping part of roll A 3 and roll B 4 while improving the stability of the docking. At the same time, the material storage buffer equipment 11 enables the entire production line to operate uninterruptedly, effectively ensuring production efficiency. After the overlapping part of roll A 3 and roll B 4 is effectively reduced, materials are saved and waste is avoided, and the errors in subsequent process detection and judgment are reduced, effectively solving the technical problem of the long overlapping part of roll A 3 and roll B 4 when docking in the prior art.

[0054] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0055] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic docking device with constant tension control, comprising a frame and two rolls, both of which are equipped with packaging film rolls, and the packaging film is defined to be transported from back to front. The two rolls are arranged at intervals in the front-to-back direction and are both rotatably assembled on the frame, and in the direction from back to front, the packaging film rolls on the two rolls are defined as roll A and roll B respectively; a docking assembly and a traction mechanism are also provided on the frame, the docking assembly is located between roll A and roll B, and the docking assembly has an A roll cutting mechanism corresponding to roll A and a B roll cutting mechanism corresponding to roll B, and both the A roll cutting mechanism and the B roll cutting mechanism have a docking position for providing a docking position for roll A and roll B; the traction mechanism The mechanism is located in front of roll B, and the traction mechanism is used to pull roll A and roll B for alternating transportation; it is characterized by: Also includes: A suction piece, which is arranged at the docking position, wherein the suction piece in the A roll cutting mechanism is used to suction the tail end of the A roll to dock with the B roll, and the suction piece in the B roll cutting mechanism is used to suction the tail end of the B roll to dock with the A roll; Two power mechanisms, the two power mechanisms are respectively connected to the two reels to drive the two reels to rotate and feed the materials; A first tension controller, which is arranged on the frame and is used for the packaging film on the A roll to bypass so as to control the transmission tension of the A roll; A second tension controller, which is arranged on the frame and is used for the packaging film on the B roll to bypass so as to control the transmission tension of the B roll; A material storage and buffering device is arranged on the frame and located between the B roll and the traction mechanism. The material storage and buffering device stores packaging film. The material storage and buffering device is used to replenish the packaging film to the traction mechanism in time when the A roll and the B roll are stopped for connection; a transparent tape is arranged at the head end of the B roll, and the area of ​​the transparent tape adhering to the B roll is half of the transparent tape; The traction mechanism includes a traction roller, the material storage cache device includes a lower roller group and an upper roller group, the lower roller group includes two rows of lower rollers, the two rows of lower rollers are arranged at intervals along the front-to-back direction, the rear row is a fixed row, and the front row is a movable row, the material storage cache device also includes a driving mechanism for driving the movable row to move forward and backward to adjust the feeding; The upper roller group includes two upper rollers arranged at intervals in the left-right direction. The packaging film of the A roll or the B roll is interlaced along the fixed row and the movable row, and then conveyed to the traction roller after passing through the two upper rollers. The power mechanism is a motor.

2. The automatic docking device with constant tension control according to claim 1, characterized in that: The docking assembly includes a box body, which is fixed on a frame. The A roll cutting mechanism and the B roll cutting mechanism are relatively arranged in the box body along the front-to-back direction. A pad knife seat is arranged in the box body and is located between the A roll cutting mechanism and the B roll cutting mechanism; the A roll cutting mechanism and the B roll cutting mechanism both include a clamping plate arranged on the top and a docking plate arranged on the bottom, and also include a cutter arranged between the clamping plate and the docking plate, the clamping plate is used to cooperate with the pad knife seat on the upper side to clamp the packaging film in the A roll or the B roll, and the two docking plates are used to cooperate on the lower side to dock the A roll and the B roll after docking, wherein the docking position is formed on one side of each docking plate facing the other docking plate; the A roll cutting mechanism and the B roll cutting mechanism both include a control component for controlling the clamping plate to approach and move away from the pad knife seat and controlling its own docking plate to approach or move away from the other docking plate.

3. The automatic splicing device with constant tension control according to claim 2, characterized in that: The A-roll cutting mechanism includes a first cylinder whose output end faces the knife pad seat, the lower end of the first cylinder supports a mounting plate, the mounting plate is fixed on the frame, the output end of the first cylinder is connected to a folding plate, the direction perpendicular to the front-to-back direction in the horizontal plane is defined as the left-right direction, the folding plate extends along the left-right direction, the cutter is fixed on the folding plate and is connected to the clamping plate through a connecting rod, the A-roll cutting mechanism also includes a second cylinder, the second cylinder is arranged on the lower side of the frame, the output end of the second cylinder is connected to the docking plate, the first cylinder and the second cylinder constitute the control component.

4. The automatic splicing device with constant tension control according to claim 3, characterized in that: The B roll cutting mechanism is the same as the A roll cutting mechanism, and accordingly also has a first cylinder, a folding plate, and a second cylinder.

5. The automatic splicing device with constant tension control according to claim 3 or 4, characterized in that: A guide seat is fixed on the mounting plate, and a guide shaft passing through the guide seat is connected to the folding plate.

6. The automatic splicing device with constant tension control according to claim 3 or 4, characterized in that: One end of the connecting rod is connected to the clamping plate, and the other end passes through the folding plate, and a spring is sleeved on the portion of the connecting rod located between the clamping plate and the folding plate.

7. The automatic splicing device with constant tension control according to claim 3 or 4, characterized in that: The adsorption component comprises an adsorption plate fixed on the docking plate, and a side of the docking plate facing away from the adsorption plate is provided with a negative pressure mechanism for providing negative pressure adsorption force for the adsorption plate.

8. The automatic splicing device with constant tension control according to claim 1, characterized in that: The driving mechanism comprises a horizontally arranged transverse cylinder, which is arranged on a side of the frame facing away from the traction mechanism, and an output end of the transverse cylinder is connected to the movable row.

Images