Automatic unwinding machine

Abstract

The present invention discloses an automatic unwinding machine, which relates to the technical field of film or paper coating, including a bracket and a coating, wherein two motors 1 and two reducers are fixedly installed on the bracket, and two unwinding rollers and two tensioning rollers are rotatably installed on the bracket, and a rotating shaft is fixedly installed on each of the two unwinding rollers, and one end of the two rotating shafts away from the motor 1 is connected to the corresponding reducer, and a docking mechanism is installed between the two unwinding rollers and the corresponding motor 1. The advantages are: the position and size of the new roll and the residual roll can be automatically detected, and then the roll can be automatically cut and switched according to the remaining amount of the old roll, without manual roll change, and the roll change efficiency is higher. At the same time, there is no need to stop the equipment during the roll change process, which improves the production efficiency. The active unwinding method is adopted during the roll change process, which is suitable for the coating material that is easy to break and deform, and the damping tension control unwinding cannot be performed.

Description

Technical Field

[0001] The invention relates to the technical field of film or paper coating, and in particular to an automatic unwinding machine. Background Art

[0002] The coating machine is mainly used for the surface coating process production of film, paper, etc. This machine is to coat the rolled substrate with a layer of glue, coating or ink with specific functions, and then cut it into sheets or roll it after drying. It uses a special multi-functional coating head, which can realize various forms of surface coating. The winding and unwinding of the coating machine are equipped with full-speed automatic film splicing mechanism, PLC program tension closed loop automatic control, and the unwinder is a kind of automatic loading and unwinding equipment used by the auxiliary coating machine.

[0003] First, when the horizontal unwinder receives materials, two people are required to cooperate and operate in time (no delay). The new roll needs to be pressed, the remaining roll needs to be cut, the new roll needs to be pushed by hand, and then the overlap of the two rolls needs to be pressed and glued. During the process, the operator needs to put his hand into the equipment to operate, which poses certain safety risks. In addition, the replacement of the new roll with the old roll is completed during the unwinding process. Due to the high unwinding speed, manual labor cannot meet the demand, and the operation needs to be stopped or the operation speed needs to be reduced to slow down the operator, which will seriously affect the efficiency of roll changing.

[0004] Secondly, when the operator changes the rolls and overlaps them during the unwinding process, there will be overlap deviation, which affects the quality of the overlap and thus the overall coating effect. At the same time, the overlap is bonded with double-sided tape, and there is a certain tension in the coating after bonding, and there is a probability of detachment at the overlap.

[0005] Therefore can adopt a kind of novel automatic unwinding machine to solve the shortcomings of prior art. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and to propose an automatic unwinding machine.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An automatic unwinding machine comprises a bracket and a coating, wherein two motors 1 and two reducers are fixedly mounted on the bracket, two unwinding rollers and two tensioning rollers are rotatably mounted on the bracket, a rotating shaft is fixedly mounted on each of the two unwinding rollers, one end of the two rotating shafts away from the motor 1 is connected to the corresponding reducer, a docking mechanism is installed between the two unwinding rollers and the corresponding motor 1, a coating roller is rotatably mounted on the bracket, a cutting mechanism matched with the coating is installed on the bracket, and a pressing mechanism and a heating mechanism matched with the coating are installed on the bracket.

[0009] In the above-mentioned automatic unwinding machine, a limit disk is fixedly installed on the bracket, a circular hole is opened on the limit disk, and two bearings are fixedly installed on the rotating shaft. The outer rings of the two bearings are extended into the circular hole and fixedly connected to the limit disk.

[0010] In the above-mentioned automatic unwinding machine, the docking mechanism includes a safety chuck fixedly mounted on the bracket, a through hole is provided on the safety chuck, a connecting rod is fixedly mounted on the driving end of the motor, a hexagonal slot is provided on the connecting rod, a bearing 2 is fixedly mounted on the connecting rod, the outer ring of the bearing 2 extends into the through hole and is fixedly connected to the safety chuck, a hexagonal clamping rod matching the hexagonal slot is slidably mounted on the end of the rotating shaft close to the safety chuck, a slide groove matching the hexagonal clamping rod is provided on the rotating shaft, and a reset spring is fixedly mounted between the hexagonal clamping rod and the slide groove.

[0011] In the above-mentioned automatic unwinding machine, a placing table is fixedly installed on the bracket, two hooks are fixedly installed on both sides of the placing table, and a replacement roller is placed between the two matching hooks.

[0012] In the above-mentioned automatic unwinding machine, the cutting mechanism includes a fixed frame fixedly mounted on the bracket, a rotating cylinder is fixedly mounted on the fixed frame, a rotating shaft is fixedly mounted on the driving end of the rotating cylinder, a clamp is sleeved on the rotating shaft, and a cutting knife matching the coating is clamped on the clamp.

[0013] In the above-mentioned automatic unwinding machine, two upright posts are fixedly mounted on the bracket, and a side pressure plate cooperating with the cutter is fixedly mounted between the two upright posts and the bracket, and the coating passes through the surface of the side pressure plate.

[0014] In the above-mentioned automatic unwinding machine, the clamping mechanism includes a plurality of sliders slidably mounted on a bracket, and an axial rod is mounted between two matching sliders for common rotation, each of the axial rods passes through the corresponding slider, and a clamping roller is fixedly mounted on each of the axial rods, and a driving structure matching the rotating shaft is mounted on the bracket.

[0015] In the above-mentioned automatic unwinding machine, the driving structure includes a mounting plate slidably mounted on a bracket, the mounting plate is fixedly connected to a slider, a second motor is fixedly mounted on the mounting plate, a driving end of the second motor is fixedly connected to a shaft rod, and a moving part is installed between the bracket and the two shaft rods.

[0016] In the above-mentioned automatic unwinding machine, the moving component includes a fixed plate 1 fixedly mounted on two sliders on one side and a fixed plate 2 fixedly mounted on two mounting plates, a rotating rod is rotatably mounted on each of the two fixed plates 1 and the two fixed plates 2, two limit frames are fixedly mounted on the bracket, a round rod is slidably mounted on each of the two limit frames, the two matching rotating rods are rotatably connected to the corresponding round rods, a connecting block is rotatably mounted on each of the two round rods, a pull rod is fixedly mounted on each of the two connecting blocks, the two pull rods are slidably connected to the corresponding limit frames, two electric push rods are fixedly mounted on the bracket, and the driving ends of the two electric push rods are fixedly connected to the corresponding pull rods.

[0017] In the above-mentioned automatic unwinding machine, the heating mechanism includes a heating tube rotatably mounted on a bracket, a water pump and a heating box are fixedly mounted on the bracket, a water pipe 1 is fixedly connected between the heating box and the water pump, a water pipe 2 is fixedly connected between the water pump and one end of the heating tube, and a water pipe 3 is fixedly connected between the heating box and the other end of the heating tube.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1: This automatic unwinding machine can make the unwinding roller rotate actively by setting a motor 1 to realize active unwinding operation. At the same time, the unwinding speed can be adjusted by the reducer. It is suitable for active unwinding and is suitable for situations where the rubber-coated material is easy to break and deform, and the damping tension control unwinding cannot replace it. It has a better unwinding effect and does not require manual pushing of the new roll, reducing the probability of material breakage.

[0020] 2: This automatic unwinding machine can automatically cut the remaining materials of the old roll according to the usage of the old roll by setting a cutting knife, a rotating cylinder, a rotating shaft and a clamp. There is no need for manual cutting, so it has high safety performance and no need to stop the equipment, which makes the roll changing more efficient.

[0021] 3: This automatic unwinding machine can automatically compress the double-sided tape at the joint of the new and old rolls by setting a clamping roller, an electric push rod and a rotating rod, thereby improving the firmness of the joint. At the same time, the second motor is used to drive the clamping roller to rotate, ensuring that the angular velocity of the clamping roller is consistent with the moving speed of the coating, avoiding the situation where the coating tension increases due to clamping and causes the joint to fall off, and has a more stable clamping effect.

[0022] 4: This automatic unwinding machine can preheat the coating surface by setting a water pump, a heating pipe and a heating box to provide a more suitable temperature for subsequent coating. At the same time, the heating can also act on the connection between the new and old rolls, heating the double-sided tape at the connection, which can improve the adhesion effect of the double-sided tape and improve the firmness of the connection.

[0023] In summary, the present invention can automatically detect the position and size of the new roll and the residual roll, and then automatically cut and switch the roll according to the remaining amount of the old roll. There is no need for manual roll changing, and the roll changing efficiency is higher. At the same time, there is no need to stop the equipment during the roll changing process, which improves production efficiency. An active unwinding method is adopted during the roll changing process, which is suitable for the rubber-coated material that is easy to break and deform, and the damping tension control unwinding cannot be performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 This is a structural schematic diagram of an automatic unwinding machine proposed by the present invention;

[0026] Figure 2 for Figure 1 A schematic detailed diagram of the structure after being rotated a certain angle in one direction;

[0027] Figure 3 for Figure 1 A schematic detailed diagram of the structure after being rotated a certain angle in another direction;

[0028] Figure 4 for Figure 2 Detailed schematic diagram of the structure of the motor, unwinding roller and reducer;

[0029] Figure 5 for Figure 4 Detailed schematic diagram of the exploded structure;

[0030] Figure 6 for Figure 2 Detailed schematic diagram of the structure of the rotating cylinder and coating;

[0031] Figure 7 for Figure 6 Detailed schematic diagram of the structure after removing the coating and side pressure plates;

[0032] Figure 8 for Figure 2 The structural schematic details of the bracket, motor 2, water pump and water tank are retained;

[0033] Fig. 9 for Figure 8 Detailed structural diagram of the middle motor 2, the pressing roller, the electric push rod and the limit frame;

[0034] Fig.10 for Fig. 9 A detailed diagram of the enlarged structure of the electric push rod, motor 2 and limit frame after they are rotated to a certain angle.

[0035] In the figure: 1 bracket, 2 placement table, 3 unwinding roller, 4 safety chuck, 5 limit plate, 6 reducer, 7 coating, 8 motor 1, 9 tensioning roller, 10 control panel, 11 water pump, 12 heating box, 13 heating pipe, 14 rotating cylinder, 15 motor 2, 16 bearing 1, 17 bearing 2, 18 connecting rod, 19 hexagonal clamping rod, 20 rotating shaft, 21 fixed frame, 22 side pressure plate, 23 rotating shaft, 24 clamp, 25 cutter, 26 clamping roller, 27 coating roller, 28 limit frame, 29 electric push rod, 30 shaft rod, 31 slider, 32 mounting plate, 33 rotating rod, 34 connecting block. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Reference Figure 1-Figure 3 An automatic unwinding machine includes a bracket 1 and a coating 7, two motors 8 and two reducers 6 are fixedly installed on the bracket 1, two unwinding rollers 3 and two tensioning rollers 9 are rotatably installed on the bracket 1, a rotating shaft 20 is fixedly installed on each of the two unwinding rollers 3, one end of the two rotating shafts 20 away from the motor 8 is connected to the corresponding reducer 6, and a docking mechanism is installed between the two unwinding rollers 3 and the corresponding motor 8;

[0038] A PLC program tension closed-loop automatic control system is installed on the bracket 1 to control the tensioning roller 9 to ensure that the coating 7 passing through the tensioning roller 9 maintains a stable tension to avoid uneven coating. At the same time, the fixed tension is also beneficial to the stability of the connection between the new and old rolls.

[0039] The function of the docking mechanism is to drive the rotating shaft 20 to rotate through the motor 8. A detachable connection is adopted between the two to facilitate the replacement of new rolls and old rolls. At the same time, a reducer 6 is adopted to ensure that the unwinding speed is consistent with the old roll speed when changing rolls, thereby ensuring the perfect docking of the new and old rolls.

[0040] The unwinding roller 3 can be actively rotated to realize active unwinding operation. At the same time, the unwinding speed can be adjusted by the reducer 6. It is suitable for active unwinding and is suitable for situations where the rubber coating material is easy to break and deform and the damping tension control unwinding cannot replace it. It has a better unwinding effect and does not require manual pushing of the new roll, thereby reducing the probability of material breakage.

[0041] Reference Figure 4-Figure 5A limit plate 5 is fixedly installed on the bracket 1, and a round hole is opened on the limit plate 5. Two bearings 16 are fixedly installed on the rotating shaft 20. The outer rings of the two bearings 16 are extended into the round hole and fixedly connected with the limit plate 5. The purpose of this design is to reduce friction, extend the service life of the rotating shaft 20, and reduce the load on the motor 8.

[0042] Reference Figure 4-Figure 5 The docking mechanism includes a safety chuck 4 fixedly mounted on the bracket 1, a through hole is provided on the safety chuck 4, a connecting rod 18 is fixedly mounted on the driving end of the motor 18, a hexagonal slot is provided on the connecting rod 18, and a bearing 2 17 is fixedly mounted on the connecting rod 18;

[0043] The outer ring of the second bearing 17 extends into the through hole and is fixedly connected to the safety chuck 4. A hexagonal clamping rod 19 matching with the hexagonal clamping groove is slidably installed on one end of the rotating shaft 20 close to the safety chuck 4. A sliding groove matching with the hexagonal clamping rod 19 is opened on the rotating shaft 20, and a reset spring is fixedly installed between the hexagonal clamping rod 19 and the sliding groove.

[0044] Manually press the hexagonal clamping rod 19 to retract the hexagonal clamping rod 19 into the rotating shaft 20, then insert the end of the rotating shaft 20 away from the hexagonal clamping rod 19 into the limit plate 5, and then align the hexagonal clamping rod 19 with the hexagonal clamping groove on the connecting rod 18, and then release the hexagonal clamping rod 19, and insert the hexagonal clamping rod 19 into the hexagonal clamping groove under the action of the reset spring to achieve docking; this makes the disassembly of the unwinding roller 3 more convenient without affecting the normal operation of the unwinding roller 3, and is convenient for placing the rolled coating 7 on the unwinding roller 3.

[0045] Reference Figure 1-Figure 3 A placement table 2 is fixedly installed on the bracket 1, and two hooks are fixedly installed on both sides of the placement table 2, and a replacement roller is placed between the two matching hooks; the placement table 2 is used to store new coated rolls, which is convenient for taking rolls when changing rolls and improving the efficiency of roll changing. At the same time, the hooks on both sides are used to place old rolls to prevent the old rolls from being lost.

[0046] Reference Figure 2 , Figure 6-Figure 7 A coating roller 27 is rotatably mounted on the bracket 1, and a cutting mechanism matched with the coating 7 is mounted on the bracket 1. The cutting mechanism includes a fixed frame 21 fixedly mounted on the bracket 1, a rotating cylinder 14 is fixedly mounted on the fixed frame 21, a rotating shaft 23 is fixedly mounted on the driving end of the rotating cylinder 14, a clamp 24 is sleeved on the rotating shaft 23, and a cutting knife 25 matched with the coating 7 is clamped on the clamp 24;

[0047] The rotation of the rotary cylinder 14 drives the cutter 25 to rotate (the rotation angle of the driving end of the rotary cylinder 14 is 180 degrees) to cut off the residual coating 7 on the old roll, without manual cutting, with high safety. At the same time, the rotation speed of the old roll can be changed by the reducer 6 to facilitate docking with the new roll; a circular hole is opened on the clamp 24, and a circular hole is also opened at the corresponding position on the cutter 25. The two circular holes are connected by bolts, so that the cutter 25 can be disassembled and replaced.

[0048] Reference Figure 6-Figure 7 Two columns are fixedly installed on the bracket 1, and a side pressure plate 22 cooperating with the cutter 25 is fixedly installed between the two columns and the bracket 1, and the coating 7 passes through the surface of the side pressure plate 22;

[0049] The function of the side pressure plate 22 is to limit the coating 7 so that the coating 7 moves close to the side pressure plate 22, which can level the coating 7, improve the flatness of the coating 7, and reduce the probability of wrinkles on the coating 7. At the same time, it can also be used in conjunction with the cutter 25 to provide a force support point for the cutter 25. The coating 7 is cut off by squeezing between the cutter 25 and the side pressure plate 22, which can effectively avoid the deformation of the coating 7 and cause tension changes, and can effectively control the tension of the coating 7.

[0050] Reference Figure 8-Figure 10 The bracket 1 is provided with a clamping mechanism and a heating mechanism that match the coating 7. The clamping mechanism includes a plurality of sliders 31 slidably mounted on the bracket 1. A shaft 30 is mounted between two matching sliders 31 for common rotation. Each shaft 30 passes through the corresponding slider 31. A clamping roller 26 is fixedly mounted on each shaft 30. A driving structure that matches the shaft 30 is mounted on the bracket 1.

[0051] This design can automatically compress the double-sided tape at the joint of the new and old rolls to improve the firmness of the connection. The end face of the slider 31 is square, which can ensure that the slider 31 will not deviate when sliding on the bracket 1, thereby improving the sliding stability of the slider 31. The shaft 30 and the slider 31 are connected by a bearing to reduce friction and make the shaft 30 rotate more smoothly. The double-sided tape at the joint of the new and old rolls can be automatically compressed to improve the firmness of the connection.

[0052] Reference Figure 8-Figure 10 The driving structure includes a mounting plate 32 slidably mounted on the bracket 1, the mounting plate 32 is fixedly connected to the slider 31, a motor 2 15 is fixedly mounted on the mounting plate 32, a driving end of the motor 2 15 is fixedly connected to the shaft 30, and a moving part is installed between the bracket 1 and the two shafts 30;

[0053] The motor 2 15 is used to drive the clamping roller 26 to rotate, ensuring that the angular velocity of the clamping roller 26 is consistent with the moving speed of the coating 7, avoiding the situation where the tension of the coating 7 increases due to clamping and causes the connection to fall off, and having a more stable clamping effect.

[0054] Reference Figure 8-Figure 10 The moving parts include a fixing plate 1 fixedly mounted on two sliders 31 on one side and a fixing plate 2 fixedly mounted on two mounting plates 32. A rotating rod 33 is rotatably mounted on the two fixing plates 1 and the two fixing plates 2. Two limit frames 28 are fixedly mounted on the bracket 1, and a round rod is slidably mounted on the two limit frames 28. Grooves are provided on the limit frames 28 and the bracket 1, and sliding blocks are fixedly mounted on both ends of the round rod. The two sliding blocks slide in the corresponding grooves respectively. This can effectively avoid the deviation of the round rod during the sliding process and improve the stability of the round rod.

[0055] The two matching rotating rods 33 are rotatably connected with the corresponding round rods, a connecting block 34 is rotatably installed on each of the two round rods, a pull rod is fixedly installed on each of the two connecting blocks 34, the two pull rods are slidably connected with the corresponding limit frames 28, two electric push rods 29 are fixedly installed on the bracket 1, and the driving ends of the two electric push rods 29 are fixedly connected with the corresponding pull rods;

[0056] A circular hole is provided at the driving end of the electric push rod 29, and a fixed flat iron is fixedly installed at the end of the pull rod close to the electric push rod 29. A circular hole is provided on the fixed flat iron, and the two circular holes are fixedly connected by bolts, so that the electric push rod 29 can be freely disassembled for inspection and replacement; a through hole matching the pull rod is provided on the limit frame 28, and a plurality of embedded ball bearings are rollingly installed on the inner wall of the through hole, and each ball bearing is against the pull rod, which can effectively reduce the friction and reduce the load on the electric push rod 29.

[0057] Reference Figure 1-Figure 3 , Figure 8 The heating mechanism includes a heating pipe 13 rotatably mounted on the bracket 1, a water pump 11 and a heating box 12 are fixedly mounted on the bracket 1, a water pipe 1 is fixedly connected between the heating box 12 and the water pump 11, a water pipe 2 is fixedly connected between the water pump 11 and one end of the heating pipe 13, and a water pipe 3 is fixedly connected between the heating box 12 and the other end of the heating pipe 13;

[0058] The coating 7 surface can be preheated to provide a more suitable temperature for subsequent coating. At the same time, the heating can also act on the connection between the new and old rolls, heating the double-sided tape at the connection, which can improve the adhesion effect of the double-sided tape and improve the firmness of the connection at the connection.

[0059] A control panel 10 and an automatic old roll detection device are installed on the bracket 1. The control panel 10 controls the motor 1 8, the motor 2 15, the rotary cylinder 14, the electric push rod 29 and the water pump 11. The automatic old roll detection device can detect the usage of the old roll.

[0060] First, place the new coating roll on the unwinding roller 3, and then manually press the hexagonal clamping rod 19 to retract the hexagonal clamping rod 19 into the rotating shaft 20, and then insert the end of the rotating shaft 20 away from the hexagonal clamping rod 19 into the limiting disk 5, and then align the hexagonal clamping rod 19 with the hexagonal clamping groove on the connecting rod 18, and then release the hexagonal clamping rod 19, and insert the hexagonal clamping rod 19 into the hexagonal clamping groove under the action of the reset spring to achieve docking.

[0061] During the unwinding and coating process of the old roll, the motor 8 drives the unwinding roller 3 to rotate for active unwinding.

[0062] Then, the coating 7 at the end of the new coated roll is pulled out, double-sided tape is adhered to the end position, and then the end with the double-sided tape is placed on the cutter 25. When the old roll is used up, the coating 7 remaining on the old roll is detected by the automatic detection of the old roll device. Once the coating 7 is damaged (the coating 7 at the end is not flat, but in an oblique triangle shape), the control panel 10 will control the operation of the rotating cylinder 14, and the driving end of the rotating cylinder 14 will rotate to drive the rotating shaft 23, the clamp 24 and the cutter 25 to rotate, so that the cutter 25 rotates 90 degrees to cut off the coating 7 on the old roll.

[0063] At this time, the speed reducer 6 is used to control the rotation speed of the new roll so that the rotation speed of the new roll is the same as that of the old roll. At this time, the double-sided adhesive part of the coating 7 on the new roll will move with the old roll until the docking position moves to the position of the coating roller 27. At this time, the double-sided adhesive is adhered to the old coating 7, and then the connection part will pass between the two clamping rollers 26. At this time, the sensor in the control panel 10 will control the operation of the electric push rod 29, and the electric push rod 29 drives the pull rod type pull rod to drive the connecting block 34 to move to the side away from the motor 2 15, and drives the two sliders 31 to move to the side close to each other through the rotating rod 33 until the two clamping rollers 26 and the coating 7 are against each other. At this time, the double-sided adhesive at the connection will be compacted. Since compaction will generate a large friction force, which affects the tension of the coating 7, during the compaction process, the motor 2 15 will drive the clamping roller 26 to rotate for rotation and compaction. The rotation speed is the same as the movement speed of the coating 7, so that the tension of the coating 7 can be ensured to be stable.

[0064] After compacting the connection, the high-temperature water in the heating box 12 is pumped into the heating pipe 13 through the water pump 11. The heating pipe 13 is coated with 7 to heat up, which is convenient for the adhesion of the coating. At the same time, heating can also improve the adhesion of the double-sided tape and improve the firmness of the connection between the new and old coatings 7.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic unwinding machine, It is characterized in that It comprises a support (1) and a coating (7), wherein two motors (8) and two reducers (6) are fixedly mounted on the support (1), two unwinding rollers (3) and two tensioning rollers (9) are rotatably mounted on the support (1), a rotating shaft (20) is fixedly mounted on each of the two unwinding rollers (3), one end of the two rotating shafts (20) away from the motor (8) is connected to the corresponding reducer (6), a docking mechanism is installed between the two unwinding rollers (3) and the corresponding motor (8), a coating roller (27) is rotatably mounted on the support (1), a cutting mechanism matched with the coating (7) is installed on the support (1), and a pressing mechanism and a heating mechanism matched with the coating (7) are installed on the support (1); The clamping mechanism comprises a plurality of sliders (31) slidably mounted on the bracket (1), a shaft (30) being mounted between two matching sliders (31) for co-rotation, each shaft (30) passing through a corresponding slider (31), a clamping roller (26) being fixedly mounted on each shaft (30), and a driving structure matching the shaft (30) being mounted on the bracket (1); The driving structure comprises a mounting plate (32) slidably mounted on the bracket (1), the mounting plate (32) being fixedly connected to the slider (31), a second motor (15) being fixedly mounted on the mounting plate (32), a driving end of the second motor (15) being fixedly connected to the shaft (30), and a moving component being installed between the bracket (1) and the two shafts (30); The movable component comprises a fixing plate 1 fixedly mounted on two sliders (31) on one side and a fixing plate 2 fixedly mounted on two mounting plates (32); a rotating rod (33) is rotatably mounted on each of the two fixing plates 1 and the two fixing plates 2; two limiting frames (28) are fixedly mounted on the bracket (1); a round rod is slidably mounted on each of the two limiting frames (28); two matching rotating rods (33) are rotatably connected to the corresponding round rods; a connecting block (34) is rotatably mounted on each of the two round rods; a pull rod is fixedly mounted on each of the two connecting blocks (34); the two pull rods are slidably connected to the corresponding limiting frames (28); two electric push rods (29) are fixedly mounted on the bracket (1); the driving ends of the two electric push rods (29) are fixedly connected to the corresponding pull rods.

2. The automatic unwinding machine according to claim 1, It is characterized in that A limit plate (5) is fixedly mounted on the bracket (1), a circular hole is formed on the limit plate (5), and two bearings (16) are fixedly mounted on the rotating shaft (20), the outer rings of the two bearings (16) both extend into the circular hole and are fixedly connected to the limit plate (5).

3. The automatic unwinding machine according to claim 1, It is characterized in that The docking mechanism comprises a safety chuck (4) fixedly mounted on the bracket (1), the safety chuck (4) being provided with a through hole, a connecting rod (18) fixedly mounted on the driving end of the motor 1 (8), the connecting rod (18) being provided with a hexagonal slot, a bearing 2 (17) fixedly mounted on the connecting rod (18), the outer ring of the bearing 2 (17) extending into the through hole and fixedly connected to the safety chuck (4), a hexagonal clamping rod (19) matching with the hexagonal slot being slidably mounted on one end of the rotating shaft (20) close to the safety chuck (4), a sliding groove matching with the hexagonal clamping rod (19) being provided on the rotating shaft (20), and a reset spring fixedly mounted between the hexagonal clamping rod (19) and the sliding groove.

4. The automatic unwinding machine according to claim 1, It is characterized in that A placement table (2) is fixedly mounted on the bracket (1), two hooks are fixedly mounted on both sides of the placement table (2), and a replacement roller is placed between the two matching hooks.

5. The automatic unwinding machine according to claim 1, It is characterized in that The cutting mechanism comprises a fixing frame (21) fixedly mounted on the bracket (1), a rotating cylinder (14) fixedly mounted on the fixing frame (21), a rotating shaft (23) fixedly mounted on the driving end of the rotating cylinder (14), a clamp (24) sleeved on the rotating shaft (23), and a cutting knife (25) matched with the coating (7) clamped on the clamp (24).

6. The automatic unwinding machine according to claim 5, It is characterized in that Two upright posts are fixedly mounted on the support (1), and a side pressure plate (22) matched with a cutting knife (25) is fixedly mounted between the two upright posts and the support (1), and the coating (7) passes through the surface of the side pressure plate (22).

7. The automatic unwinding machine according to claim 1, It is characterized in that The heating mechanism comprises a heating pipe (13) rotatably mounted on a bracket (1); a water pump (11) and a heating box (12) are fixedly mounted on the bracket (1); a first water pipe is fixedly connected between the heating box (12) and the water pump (11); a second water pipe is fixedly connected between the water pump (11) and one end of the heating pipe (13); and a third water pipe is fixedly connected between the heating box (12) and the other end of the heating pipe (13).

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