An automatic winding and cutting device for packaging film

Abstract

The present invention discloses an automatic winding and cutting device for packaging film, which includes a chassis, two vertical beams oppositely arranged on the chassis, a cross beam arranged between the two vertical beams, a first power module for driving the vertical movement of the cross beam, a chassis slidably arranged on the cross beam, a coil driving device arranged below the chassis, a second power module for driving the horizontal movement of the chassis, a double-sided tape pasting device, an upper film device and a cutting device arranged in the chassis. The automatic winding and cutting device for packaging film provided by the present invention can realize automatic winding and packaging of the coil with tape and automatically cut the tape, with high automation degree. Compared with the existing manual packaging, the packaging quality of each coil is consistent, the packaging film is wound smoothly and firmly, the packaging efficiency is higher, and the use of labor force is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging, and particularly relates to an automatic winding and cutting device for packaging film. Background Art

[0002] The coil material is a plastic film roll or a cloth roll (such as a non-woven fabric roll) in a cylindrical shape. After the coil material is manufactured, it needs to be transported to various places for sale. In order to protect the integrity of the coil material during transportation and handling and reduce wear, it is necessary to package and protect the coil material.

[0003] However, at present, manual packaging is usually adopted. First, the coil material is carried to the coil material driving device, then a section of double-sided tape is manually cut, and then this section of double-sided tape is pasted on the outer peripheral surface of the coil material. After removing the isolation tape, a section of double-sided tape remains. Then, the free end of the packaging film is fixed on the coil material through the double-sided tape. Furthermore, the coil material driving device is used to drive the coil material to rotate. After the packaging film winds around the coil material for several circles and holds the coil material tightly, the packaging film reciprocates along the axial direction of the coil material to achieve winding packaging. Finally, the packaging film is cut to complete the packaging of the coil material. Due to the large production volume, a large number of workers are required to maintain the packaging efficiency, resulting in high labor costs.

[0004] In order to improve the automation level of the enterprise, improve the packaging efficiency, and save labor, there is an urgent need for an automatic winding and cutting device for packaging film to replace manual operations for fixing, winding, and cutting the packaging film on the coil material, so as to achieve better packaging effects and faster packaging efficiency. Summary of the Invention

[0005] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide an automatic winding and cutting device for packaging film, aiming to replace manual operations for fixing, winding, and cutting the packaging film on the coil material, so as to achieve better packaging effects and faster packaging efficiency.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An automatic winding and cutting device for packaging film, comprising a chassis, two vertical beams oppositely arranged on the chassis, a cross beam arranged between the two vertical beams, a first power module for driving the vertical movement of the cross beam, a chassis slidably arranged on the cross beam, a coil material driving device arranged below the chassis, a second power module for driving the lateral movement of the chassis, a double-sided tape pasting device, a film feeding device, and a cutting device arranged in the chassis; the double-sided tape pasting device is located upstream of the film feeding device; the double-sided tape pasting device is used for pasting a section of double-sided tape on the outer peripheral surface of the coil material, so that the packaging film unwound by the film feeding device is fixed on the coil material through the double-sided tape; the cutting device is used for cutting the packaging film; the coil material driving device is used for driving the coil material to rotate.

[0008] The double-sided tape pasting device includes a bracket disposed inside the chassis, a tape unwinding mechanism, a winding mechanism, a braking mechanism, a rotatable pressure roller disposed below the tape unwinding mechanism and the winding mechanism, and a lifting driving device for driving the pressure roller to lift; the tape unwinding mechanism is used for unwinding the double-sided tape, the winding mechanism is used for recycling the isolation tape, the pressure roller is used for pressing the double-sided tape on the double-sided tape onto the coil material, and the braking mechanism is used for restricting the rotation of the double-sided tape to stop the unwinding of the double-sided tape.

[0009] The braking mechanism includes a stop block, a support arm fixedly disposed on the bracket, and a braking cylinder disposed at the top of the support arm; the output end of the braking cylinder is connected to the stop block through a slider, and a guide rail extending along the length direction thereof is provided on the support arm, and the slider is slidably connected to the guide rail.

[0010] The lifting driving device includes a slide table cylinder disposed on the bracket, a receiving seat provided on the output end of the slide table cylinder, and the pressure roller is rotatably disposed on the receiving seat.

[0011] The tape unwinding mechanism includes a rotating shaft rotatably disposed on the bracket, a rotation damper fixedly disposed on the bracket, and a unwinding wheel sleeved on the rotating shaft, and one end of the rotating shaft is connected to the rotation damper; the double-sided tape is wound around the unwinding wheel.

[0012] The winding mechanism includes a winding roller rotatably disposed on the bracket and a winding driving device fixed on the bracket, and the winding driving device is used for driving the winding roller to rotate.

[0013] The upper film device includes a roll change mechanism and a tension controller disposed on the chassis, a packaging film roll disposed between the roll change mechanism and the tension controller, a first pressure roller disposed below the packaging film roll, an upper film driving device for driving the first pressure roller to rotate, a second pressure roller disposed below the tape unwinding mechanism, and a blowing rod disposed on one side of the first pressure roller; the blowing rod is used for blowing up the free end of the packaging film to increase the wrap angle formed by the packaging film and the pressure roller.

[0014] The cutting device includes an electric heating cutting strip that can swing around the axis of the pressure roller and is used for cutting the packaging film, and a film cutting driving mechanism for driving the electric heating cutting strip to swing.

[0015] The roll change mechanism includes a roll change cylinder and a bearing seat disposed on the chassis, and a top shaft disposed in the bearing seat; the top shaft can move laterally relative to the bearing seat, one end of the top shaft is used for connecting with the packaging film roll, the other end of the top shaft is connected with a rotary joint, and the piston rod end of the roll change cylinder is connected to the rotary joint through a connecting plate.

[0016] The first power module includes a torque motor arranged at the top of the vertical beam, a lead screw vertically arranged on the vertical beam, and a lead screw nut arranged on the lead screw. The lead screw nut is fixedly connected to the cross beam; the torque motor is in transmission connection with the lead screw.

[0017] Advantageous effects:

[0018] The present invention provides an automatic winding and cutting device for packaging film. The coil is driven to rotate by a coil driving device, so that a double-sided tape is pasted on the coil by a double-sided tape pasting device, and the packaging film is unrolled by a film feeding device. As the coil rotates, the double-sided tape forms an adhesive bond with the packaging film, thereby fixing the packaging film on the coil; subsequently, the packaging film is wound around the coil several times to hold the coil tightly, and the first power module drives the film feeding device to lift off the coil and realize left-right movement and winding of the coil under the drive of the second power module. Finally, the cutting device automatically cuts the packaging film to complete the packaging of the coil. It can be seen that the automatic winding and cutting device for packaging film provided by the present invention can realize automatic winding and packaging of the coil with tape and automatically cut the tape, with a high degree of automation. Compared with the existing manual packaging, the packaging quality of each coil is consistent, the packaging film is wound smoothly and firmly, and the packaging efficiency is higher, greatly reducing the use of labor. Description of the drawings

[0019] Figure 1 It is the front view of the automatic winding and cutting device for packaging film provided by the present invention.

[0020] Figure 2 It is the right view of the automatic winding and cutting device for packaging film provided by the present invention.

[0021] Figure 3 It is the working principle diagram of double-sided tape pasting and film feeding in the automatic winding and cutting device for packaging film provided by the present invention.

[0022] Figure 4 It is the three-dimensional view of the double-sided tape pasting device in the automatic winding and cutting device for packaging film provided by the present invention. Figure 1 .

[0023] Figure 5 It is the three-dimensional view of the double-sided tape pasting device in the automatic winding and cutting device for packaging film provided by the present invention. Figure 2 .

[0024] Figure 6 It is the schematic diagram of the internal structure of the chassis in the automatic winding and cutting device for packaging film provided by the present invention.

[0025] Figure 7 It is the schematic diagram of the external structure of the chassis in the automatic winding and cutting device for packaging film provided by the present invention.

[0026] Figure 8 It is the right view of the chassis in the automatic winding and cutting device for packaging film provided by the present invention.

[0027] Figure 9 In the automatic winding and cutting device for packaging film provided by the present invention, it is a schematic diagram of the film cutting principle.

[0028] Main component symbol description: 11 - First power module, 12 - Second power module, 13 - Chassis, 14 - Vertical beam, 15 - Cross beam, 16 - Machine case, 2 - Coil driving device, 3 - Double-sided tape pasting device, 4 - Upper film device, 5 - Cutting device, 6 - Coil, 31 - Bracket, 32 - Tape unwinding mechanism, 33 - Rewinding mechanism, 34 - Braking mechanism, 35 - Pressure roller, 36 - Slide table cylinder, 37 - Receiving seat, 321 - Double-sided tape, 331 - Isolation tape, 341 - Stopper, 342 - Arm, 343 - Braking cylinder, 344 - Slide block, 345 - Guide rail, 322 - Rotational damper, 323 - Unwinding wheel, 332 - Rewinding roller, 333 - Rewinding driving device, 8 - Rewinding mechanism, 41 - Tension controller, 42 - Packaging film roll, 43 - First pressure roller, 44 - Second pressure roller, 45 - Blowing rod, 7 - Upper film driving device, 81 - Rewinding cylinder, 82 - Bearing seat, 83 - Top shaft, 84 - Rotary joint, 85 - Connecting plate, 86 - Bush, 87 - Guide shaft, 71 - Mounting frame, 72 - First driving motor, 73 - First synchronous pulley, 74 - Second synchronous pulley, 75 - Synchronous belt, 51 - Electric heating cutting strip, 52 - Film cutting driving mechanism, 511 - Swing frame, 512 - Electric heating strip, 521 - Film cutting cylinder, 522 - Connecting rod. Detailed implementation manners

[0029] The present invention provides an automatic winding and cutting device for packaging film. To make the purpose, technical solution and effect of the present invention clearer and more definite, the following takes examples with reference to the attached drawings to further describe the present invention in detail. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0030] Please refer to Figures 1 - 9 , the present invention provides an automatic winding and cutting device for packaging film. In the attached Figure 2 and 3 , the arrow direction is the rotation direction of the coil; the descriptions such as "first" and "second" involved in the text are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. To facilitate observing the parts inside the machine case, the side plates of the machine case in the attached drawings are hidden.

[0031] The automatic winding and cutting device for the packaging film includes a chassis 13, two vertical beams 14 oppositely arranged on the chassis 13, a cross beam 15 arranged between the two vertical beams 14, a first power module 11 for driving the vertical movement of the cross beam 15, a chassis 16 slidably arranged on the cross beam 15, a coil driving device 2 arranged below the chassis 16, a second power module 12 for driving the lateral movement of the chassis 16, a double-sided tape pasting device 3, an upper film device 4 and a cutting device 5 arranged in the chassis 16; the double-sided tape pasting device 3 is located upstream of the upper film device 4; the double-sided tape pasting device 3 is used for pasting a section of double-sided tape on the outer peripheral surface of the coil 6, so that the packaging film unwound by the upper film device 4 is fixed on the coil 6 through the double-sided tape; the cutting device 5 is used for cutting the packaging film; the coil driving device 2 is used for driving the coil 6 to rotate.

[0032] As shown Figure 2 When working, as shown, the worker transports the coil 6 to be packaged onto the coil driving device 2. The first power module 11 and the second power module 12 drive the chassis 16 to move above the coil 6. Then the coil driving device 2 drives the coil 6 to rotate, so that the double-sided tape pasting device 3 pastes a section of double-sided tape 333 on the coil 6, and the upper film device 4 unwinds the packaging film 421. As the coil 6 rotates, the double-sided tape forms an adhesion with the packaging film 421, so that the packaging film is fixed on the coil. Subsequently, it is wound several times to ensure that the packaging film 421 tightly holds the coil 6. The first power module drives the upper film device 4 to lift off the coil and realizes the left and right movement and winding of the coil 6 under the drive of the second power module 12. After the winding packaging is completed, a section of taut packaging film is formed between the upper film device 4 and the coil 6. Then the cutting device 5 automatically cuts the packaging film 421. It can be seen that the automatic winding and cutting device 5 for the packaging film provided by the present invention can realize the automatic winding and packaging of the packaging film around the coil 6 and automatically cut the packaging film. Compared with the existing manual packaging, the packaging quality of each coil 6 is consistent, the packaging film is wound smoothly and firmly, and the packaging efficiency is higher, greatly reducing the use of labor force.

[0033] Specifically, please refer to Figures 3 - 5, the double-sided tape pasting device 3 includes a bracket 31 disposed in the chassis 16, a tape unwinding mechanism 32, a winding mechanism 33, a braking mechanism 34 disposed on the bracket 31, a rotatable pressing wheel 35 disposed below the tape unwinding mechanism 32 and the winding mechanism 33, and a lifting drive device for driving the pressing wheel 35 to lift and lower; the tape unwinding mechanism 32 is used for unwinding the double-sided tape 321, the winding mechanism 33 is used for recycling the release tape 331, the pressing wheel 35 is used for pressing the double-sided adhesive 333 on the double-sided tape 321 onto the coil material 6, and the braking mechanism 34 is used for restricting the rotation of the double-sided tape 321 to stop the unwinding of the double-sided tape 321. It should be understood that the double-sided tape 321 sequentially passes around the pressing wheel 35 and the winding mechanism. When the pressing wheel 35 presses against the outer peripheral surface of the coil material 6, a fixed adhesive line 38 is formed. It can also be understood that this fixed adhesive line 38 is a dividing line. There is double-sided adhesive 333 on the release tape 331 between the fixed adhesive line 38 and the double-sided tape 321, and there is no double-sided adhesive 333 on the material separating tape 331 between the fixed adhesive line 38 and the winding mechanism 33.

[0034] When pasting the adhesive, the lifting drive device drives the pressing wheel 35 to descend so that the pressing wheel 35 presses against the outer peripheral surface of the coil material 6. At the same time, the double-sided tape 321 is pulled by the pressing wheel 35 to achieve unwinding; at this time, the double-sided adhesive 333 at the position of the fixed adhesive line is pasted on the coil material 6. Then, the coil material drive device 2 and the winding mechanism 33 act simultaneously to pull the double-sided tape 321 to enable the tape unwinding mechanism 32 to unwind. Here, the rotation directions of the pressing wheel 35 and the coil material 6 are opposite. The double-sided adhesive on the coil material 6 unfolds and adheres along the outer peripheral surface of the coil material 6 as the coil material 6 rotates. When the pasting length of the double-sided adhesive reaches the preset length (5 - 10 cm), the braking mechanism 34 brakes and holds the double-sided tape 321 to restrict the rotation of the double-sided tape 321 to stop the unwinding of the double-sided tape 321. At the same time, the winding mechanism 33 stops winding the release tape 331, and the double-sided adhesive 333 is pulled and broken at the fixed adhesive line 38 under the traction of the coil material 6. Finally, the lifting drive device drives the pressing wheel 35 to rise away from the coil material 6, so that the double-sided tape pasting device 3 completes the pasting action. It has a high degree of automation, improves the packaging efficiency, and reduces the use of labor in this pasting process. Since after each pasting action is completed, the free end of the double-sided adhesive 333 is sequentially located at the fixed adhesive line 38, the working continuity and reliability of the double-sided tape pasting device 3 are ensured.

[0035] Further, please refer to Figure 4, the braking mechanism 34 includes a stop block 341, a support arm 342 fixedly arranged on the support 31, and a braking cylinder 343 arranged at the top of the support arm 342; the output end of the braking cylinder 343 is connected to the stop block 341 through a slider 344, a guide rail 345 extending along its length direction is arranged on the support arm 342, and the slider 344 is slidably connected to the guide rail 345. The guide rail 345 can not only guide the movement of the slider 344 to ensure that the axis of the braking cylinder 343 intersects with the axis of the double-sided tape 321, but also limit the slider 344 to prevent the piston rod of the braking cylinder 343 from being deformed by the tangential force. That is, the braking cylinder 343 drives the stop block 341 to press the double-sided tape 321, so that the double-sided tape 321 stops immediately and remains stationary. It should be understood that the frictional force between the stop block 341 and the double-sided tape 321 is greater than the breaking force of the double-sided adhesive 333 to ensure that the double-sided adhesive can be smoothly broken.

[0036] To better stop the double-sided tape 321 and increase the contact area between the stop block 341 and the double-sided tape 321, the end face of the stop block 341 facing the double-sided tape 321 is adapted to the outer peripheral shape of the double-sided tape 321.

[0037] Further, please refer to Figure 4 and Figure 5 , the lifting drive device includes a slide table cylinder 36 arranged on the support 31, a receiving seat 37 is arranged on the output end of the slide table cylinder 36, and the pressure wheel 35 is rotatably arranged on the receiving seat 37. The slide table cylinder 36 has the advantages of high guiding accuracy, anti-torque, strong load capacity and stable operation, ensuring that the pressure wheel 35 will not move automatically under external force during the process of pressing against the coil 6, and ensuring that the double-sided adhesive is broken at the fixed adhesive line.

[0038] Preferably, please refer to Figure 4 and Figure 5 , the tape unwinding mechanism 32 includes a rotating shaft rotatably arranged on the support 31, a rotation damper 322 fixedly arranged on the support 31, and a unwinding wheel 323 sleeved on the rotating shaft. One end of the rotating shaft is connected to the rotation damper 322; the double-sided tape 321 is wound around the unwinding wheel 323. By setting like this, the spacer tape between the tape unwinding mechanism 32, the pressure wheel 35 and the winding mechanism has tension. Since the traction force of the coil 6 on the double-sided adhesive is greater than the resistance of the rotation damper 322, the rotating shaft and the unwinding wheel 323 can rotate to realize unwinding.

[0039] Preferably, please refer to Figure 4 and Figure 5, the winding mechanism 33 includes a winding roller 332 rotatably arranged on the bracket 31 and a winding driving device 333 fixed on the bracket 31. During operation, the winding driving device 333 drives the winding roller 332 to rotate, so that the isolation belt 331 is wound on the winding roller 332. The winding driving device 333 is preferably a pneumatic motor, which has a high starting torque, can start with load, and is easy to control.

[0040] Preferably, refer to Figure 5 , a baffle 334 is provided on the winding roller 332. The baffle can axially limit the isolation belt 331 to prevent the isolation belt 331 from disengaging from the winding roller 332 and becoming loose.

[0041] Specifically, refer to Figures 6 - 9 , the upper film device 4 includes a roll change mechanism 8 and a tension controller 41 arranged on the chassis 16, a packaging film roll 42 arranged between the roll change mechanism 8 and the tension controller 41, a first pressing roller 43 arranged below the packaging film roll 42, an upper film driving device 7 for driving the first pressing roller 43 to rotate, a second pressing roller 44 arranged below the tape unwinding mechanism 32, and a blowing rod 45 arranged on one side of the first pressing roller 43; the blowing rod 45 is used to blow up the free end of the packaging film. Here, the first pressing roller 43 and the second pressing roller 44 are parallel to each other and have the same height; the tension controller 41 is preferably a magnetic powder tension controller 41, and the magnetic powder tension controller 41 has a tension sensing function and a magnetic powder braking tension control function.

[0042] Before packaging, as shown in Figure 8 , the blowing rod 45 continuously blows out air towards the bottom of the first pressing roller 43. On the one hand, the air blows the packaging film 421 onto the first pressing roller 43, and on the other hand, the air blows up the free end of the packaging film 421, so that the free end of the packaging film inclines away from the blowing rod 45, thereby increasing the wrap angle formed by the packaging film and the first pressing roller 43, and further ensuring that the packaging film 421 is located between the first pressing roller 43 and the coil 6 during packaging, ensuring successful film application on the coil 6.

[0043] When starting to apply the film, the first power module 11 drives the chassis 16 to descend, so that the first pressure roller 43 and the second pressure roller 44 jointly press on the outer peripheral surface of the coil material 6. The coil material 6 exerts a reaction force on the first pressure roller 43 and the second pressure roller 44, and is transmitted to the first power module 11 through the chassis 16 and the cross beam 15, causing a change in the output torque of the first power module 11, thereby determining that the vertical movement of the chassis 16 is in place. The first pressure roller 43 and the second pressure roller 44 work together to ensure accurate pressure feedback of the chassis 16 and prevent a single pressure roller from pressing the coil material 6 and slipping. The first pressure roller 43 presses the packaging film 421 onto the coil material 6, and then the coil material 6 rotates under the drive of the coil material driving device 2. At the same time, the film applying driving device 7 pulls the packaging film roll 42 to unwind the packaging film 421; and the double-sided adhesive applying device 3 located upstream of the packaging film cutting device 5 pastes a section of double-sided adhesive on the coil material 6. As the coil material 6 rotates, the double-sided adhesive forms an adhesion with the packaging film, thereby fixing the packaging film on the coil material; subsequently, the packaging film winds around several circles to hold the coil material tightly. The first power module 11 drives the chassis 16 to rise, so that the first pressure roller 43 and the second pressure roller 44 are separated from the coil material 6. The distance between the first pressure roller 43 and the coil material 6 is about 10 cm. Then, the second power module 12 drives the chassis 16 to move horizontally back and forth, that is, the packaging film moves axially back and forth along the coil material 6 to achieve winding packaging; during the winding process of the packaging film, the magnetic powder tension controller 41 dynamically adjusts the tension of the packaging film, making the winding of the packaging film stable and firm, and the packaging effect of the coil material 6 better.

[0044] Further, as shown in Figure 7 The rewinding mechanism 8 includes a rewinding cylinder 81 and a bearing block 82 arranged on the chassis 16, and a top shaft 83 arranged in the bearing block 82; the top shaft 83 can move horizontally relative to the bearing block 82. One end of the top shaft 83 is used to connect with the packaging film roll 42, and a rotary joint 84 is connected to the other end of the top shaft 83. The piston rod end of the rewinding cylinder 81 is connected to the rotary joint 84 through a connecting plate 85. That is, the rewinding cylinder 81 drives the top shaft 83 to disengage from the packaging film roll 42 through the transmission of the connecting plate 85 and the rotary joint 84. Due to the function of the rotary joint 84, the top shaft 83 rotates the packaging film roll 42, and the connecting plate 85 does not rotate with the top shaft 83.

[0045] Preferably, as shown in Figure 6 On the chassis 16, a sliding sleeve 86 is provided, and a guide shaft 87 is inserted into the sliding sleeve 86. One end of the guide shaft 87 is fixedly connected to the connecting plate 85. The guide shaft 87 is slidably connected to the sliding sleeve 86. The guide shaft 87 can not only guide the movement of the connecting plate 85, but also limit the connecting plate 85, avoiding the piston rod of the rewinding cylinder 81 from being deformed by the tangential force.

[0046] Preferably, as shown in Figure 7As shown, the upper film driving device 7 includes a mounting frame 71 fixed on the chassis 16, and a first driving motor 72 arranged on the mounting frame 71; a first synchronous pulley 73 is sleeved on the output end of the first driving motor 72, and a second synchronous pulley 74 is sleeved on the end shaft of the first pressing roller 43, and the first synchronous pulley 73 and the second synchronous pulley 74 are connected by a synchronous belt 75. That is, the first driving motor 72 drives the first pressing roller 43 to rotate through the transmission of the first synchronous pulley 73, the synchronous belt 75, and the second synchronous pulley 74. Since the transmission stability of the synchronous belt 75 is relatively high, the first pressing roller 43 can rotate smoothly. The rotation speed of the first pressing roller 43 should be equal to or less than the rotation speed of the coil 6.

[0047] For further information, see Figure 8 and 9 The cutting device 5 includes an electric heating cutting strip 51 that can swing around the axis of the pressure roller and is used to cut the packaging film, and a film cutting driving mechanism 52 for driving the electric heating cutting strip 51 to swing. The electric heating cutting strip 51 includes a swing frame 511 that can swing around the second pressure roller 44, and an electric heating strip 512 arranged on the swing frame 511. The film cutting driving mechanism 52 includes a film cutting cylinder 521 and a connecting rod 522, the cylinder end of the film cutting cylinder 521 is hinged to the chassis 16, the piston rod end of the film cutting cylinder 521 is hinged to one end of the connecting rod 522; the other end of the connecting rod 522 is fixedly connected to the electric heating cutting strip 51. That is, the film cutting cylinder 521 drives the electric heating cutting strip 51 to swing back and forth within a reasonable range through the connecting rod 522, thereby cutting the packaging film 421 between the first pressing roller 43 and the coil 6, and the electric heating cutting strip 51 will not interfere with the packaging film 421 between the packaging film roll 42 and the first pressing roller 43.

[0048] After the wrapping is completed, the first power module 11 drives the chassis 16 to rise, so that a section of taut packaging film 421 is formed between the first pressing roller 43 and the coil 6, and then the film-breaking driving mechanism 52 drives the electric heating cutting strip 51 to swing around the axis of the first pressing roller 43 to cut the packaging film 421. The heated electric heating cutting strip 51 can quickly melt the packaging film 421, and the film is broken quickly and the fracture is smooth; finally, the film-breaking driving mechanism 52 drives the electric heating cutting strip 51 to reset. At this time, the free end of the packaging film is blown up again under the action of the airflow of the blowing rod 45.

[0049] To make the movement of the cross beam 15 smoother, a first power module 11 is provided on each vertical beam 14. The first power module 11 includes a torque motor arranged at the top of the vertical beam 14, a lead screw vertically arranged on the vertical beam 14, and a lead screw nut arranged on the lead screw. The lead screw nut is fixedly connected to the cross beam 15; the torque motor is in transmission connection with the lead screw. By such arrangement, the torque motor drives the lead screw to rotate, thereby driving the lead screw nut, the cross beam 15 and the components arranged on the cross beam 15 to move vertically. The torque motor can still operate continuously when the rotor rotates at a low speed or even stalls (i.e., the rotor cannot rotate), without causing damage to the motor. When the first pressure roller 43 and the second pressure roller 44 press on the coil 6, the torque motor is subject to resistance, causing its torque to change. Since the electric control box dynamically detects the torque of the torque motor, when the torque of the torque motor reaches a preset value, an in-place signal is generated, and the electric control box then controls the torque motor to stop working.

[0050] The electric controller includes a box body, a PLC controller arranged in the box body, and related control circuits.

[0051] Since the structures of the first power module 11 and the second power module 12 are the same, the working principle of the second power module 12 will not be elaborated here.

[0052] In an embodiment, please refer to Figure 2 , the coil driving device 2 includes a frame 21, a first driving roller 22 and a second driving roller 23 arranged on the frame, and a second driving motor 24 for driving the first driving roller 22 and the second driving roller 23 to rotate synchronously. The first driving roller 22 and the second driving roller 23 are arranged in parallel and have the same height. The staff directly carry the coil 6 onto the first driving roller 22 and the second driving roller 23. The first driving roller 22 and the second driving roller 23 jointly support and drive the coil 6 to rotate, which is convenient for loading and unloading and does not require clamping of the coil 6.

[0053] The working principle is briefly described as follows: The worker transports the coil 6 to be packaged onto the first driving roller 22 and the second driving roller 23. The chassis 16 is in the initial position. The first power module 11 and the second power module 12 drive the chassis 16 to move to the upper film station. At this time, the first pressing roller 43 and the second pressing roller 44 jointly press the coil 6. The torque motor is subjected to resistance, causing its torque to change. Since the electronic control box dynamically detects the torque of the torque motor, when the torque of the torque motor reaches the preset value, an in-place signal is generated, and the electronic control box then controls the torque motor to stop working. Due to the action of the blowing rod 45, the first pressing roller 43 presses the packaging film 421 tightly onto the coil 6. Then, the lifting drive device drives the pressing wheel 35 to descend, so that the pressing wheel 35 presses against the outer peripheral surface of the coil 6. The double-sided adhesive tape 321 unwinds under the traction of the pressing wheel 35. At this time, the double-sided adhesive 333 at the fixed adhesive line position adheres to the coil 6. The coil drive device 2 and the winding mechanism 33 act simultaneously, and the double-sided adhesive tape coil 6 on the double-sided adhesive tape 321 is pasted as the coil 6 rotates. When the pasting length of the double-sided adhesive 333 reaches the preset length (5 - 10 cm), the braking mechanism 34 brakes and holds the double-sided adhesive tape 321, restricting the rotation of the double-sided adhesive tape 321 to stop the unwinding of the double-sided adhesive tape 321, and the winding mechanism 33 stops winding the isolation tape 331. The double-sided adhesive is pulled by the coil 6 and breaks at the fixed adhesive line 38. Then, the lifting drive device drives the pressing wheel 35 to rise away from the coil 6. Subsequently, this section of the double-sided adhesive is about to pass through the first pressing roller 43. At this time, the upper film drive device 7 is started, and the packaging film 421 is also unfolded under the traction of the upper film drive device 7 and adheres to the surface of the coil 6. The packaging film 421 is fixed to the coil 6 through the double-sided adhesive 333. After the packaging film 421 winds around the coil 6 for several turns, it tightly hugs the coil 6. Then, the first power module 11 rises, causing the first pressing roller 43 and the second pressing roller 44 to leave the coil 6. Then, the second power module 12 drives the chassis 16 to move horizontally back and forth, so that the packaging film moves left and right and winds around the coil 6. When the coil 6 winds enough packaging film 421, the second power module 12 and the coil drive device 2 stop working. A section of the tightened packaging film 421 is formed between the first pressing roller 43 and the coil 6. Then, the film-breaking drive mechanism 52 drives the electric heating cutting strip 51 to swing around the axis of the first pressing roller 43 to cut off the packaging film. The heated electric heating cutting strip 51 can quickly melt the packaging film. Finally, the first power module 11 and the second power module 12 drive the chassis 16 to reset to the initial position.

[0054] It can be understood that for those of ordinary skill in the art, equivalent substitutions or changes can be made according to the technical solutions and inventive concepts of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. An automatic winding and cutting device for packaging film, characterized in that, it includes a chassis, two vertical beams oppositely arranged on the chassis, a cross beam arranged between the two vertical beams, a first power module for driving the vertical movement of the cross beam, a chassis slidably arranged on the cross beam, a coil driving device arranged below the chassis, a second power module for driving the lateral movement of the chassis, a double-sided tape pasting device, an upper film device and a cutting device arranged in the chassis; the double-sided tape pasting device is located upstream of the upper film device; the double-sided tape pasting device is used for pasting a section of double-sided tape on the outer peripheral surface of the coil, so that the packaging film unwound by the upper film device is fixed on the coil through the double-sided tape; the cutting device is used for cutting the packaging film; the coil driving device is used for driving the coil to rotate; the double-sided tape pasting device includes a bracket arranged in the chassis, a tape unwinding mechanism, a winding mechanism, a braking mechanism, a pressing wheel rotatably arranged below the tape unwinding mechanism and the winding mechanism, and a lifting driving device for driving the lifting of the pressing wheel; the tape unwinding mechanism is used for unwinding the double-sided tape, the winding mechanism is used for recycling the isolation tape, the pressing wheel is used for pressing the double-sided tape on the double-sided tape onto the coil, and the braking mechanism is used for restricting the rotation of the double-sided tape to stop the unwinding of the double-sided tape; the tape unwinding mechanism includes a rotating shaft rotatably arranged on the bracket, a rotating damper fixedly arranged on the bracket, and a unwinding wheel sleeved on the rotating shaft, and one end of the rotating shaft is connected with the rotating damper; the double-sided tape is wound around the unwinding wheel; the upper film device includes a roll changing mechanism and a tension controller arranged on the chassis, a packaging film roll arranged between the roll changing mechanism and the tension controller, a first pressing roller arranged below the packaging film roll, an upper film driving device for driving the rotation of the first pressing roller, a second pressing roller arranged below the tape unwinding mechanism, and a blowing rod arranged on one side of the first pressing roller; the blowing rod is used for blowing up the free end of the packaging film to increase the wrap angle formed by the packaging film and the pressing roller.

2. The automatic winding and cutting device for packaging film according to claim 1, characterized in that, the braking mechanism includes a stop block, a support arm fixedly arranged on the bracket, and a braking cylinder arranged at the top of the support arm; the output end of the braking cylinder is connected with the stop block through a slider, and a guide rail extending along the length direction of the support arm is arranged on the support arm, and the slider is slidably connected with the guide rail.

3. The automatic winding and cutting device for packaging film according to claim 1, characterized in that, the lifting driving device includes a slide table cylinder arranged on the bracket, a receiving seat is arranged on the output end of the slide table cylinder, and the pressing wheel is rotatably arranged on the receiving seat.

4. The automatic winding and cutting device for packaging film according to claim 1, characterized in that, the winding mechanism includes a winding roller rotatably arranged on the bracket and a winding driving device fixed on the bracket, and the winding driving device is used for driving the winding roller to rotate.

5. The automatic winding and cutting device for packaging film according to claim 1, characterized in that, the cutting device includes an electric heating cutting strip that can swing around the axis of the pressing roller and is used for cutting the packaging film, and a film cutting driving mechanism for driving the electric heating cutting strip to swing.

6. The automatic winding and cutting device for packaging film according to claim 1, characterized in that, the roll-changing mechanism includes a roll-changing cylinder and a bearing block arranged on the chassis, and a top shaft arranged in the bearing block; the top shaft can move horizontally relative to the bearing block, one end of the top shaft is used to connect with the packaging film roll, the other end of the top shaft is connected with a rotary joint, and the end of the piston rod of the roll-changing cylinder is connected with the rotary joint through a connecting plate.

7. The automatic winding and cutting device for packaging film according to claim 1, characterized in that, the first power module includes a torque motor arranged on the top of the vertical beam, a lead screw vertically arranged on the vertical beam, and a lead screw nut arranged on the lead screw. The lead screw nut is fixedly connected with the cross beam; the torque motor is in transmission connection with the lead screw.

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