Carton opening film machine

Abstract

The application discloses a carton film opening machine, which comprises a rack and a conveying mechanism, wherein the conveying mechanism comprises a first conveyor and a second conveyor which are installed on the rack, the tail side of the first conveyor is provided with a discharging port, and the second conveyor is arranged at the discharging port; a pushing mechanism is arranged above the first conveyor at the discharging port, and the pushing mechanism is used for conveying the carton on the first conveyor from the discharging port to the second conveyor; film cutting mechanisms are symmetrically arranged on both sides of the first conveyor and on both sides of the discharging port; and a film tearing mechanism is arranged on the second conveyor. A receiving hopper is arranged below the second conveyor and corresponds to the film tearing mechanism, and a collecting mechanism for collecting and storing plastic film is arranged on the rack below the receiving hopper. The device is simple and effective, can efficiently cut and tear the plastic film outside the carton, and can effectively collect the torn plastic film, thereby significantly improving the production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of cardboard box processing equipment, and specifically relates to a cardboard box film opening machine. Background Technology

[0002] Medical devices and raw materials are typically packaged in cardboard boxes and covered with a layer of plastic film for sale and transportation. During mass production, the plastic film needs to be removed from the cardboard boxes, and the products taken out. Existing cardboard box unwrapping machines are complex in structure and have low unwrapping efficiency, affecting the removal and use of the products. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention aims to provide a carton film-opening machine. This device has a simple and effective structure, enabling efficient cutting and tearing of the plastic film on the outside of cartons, and effective collection of the torn plastic film, thereby significantly improving production efficiency.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A carton unwrapping machine includes a frame and a conveying mechanism. The conveying mechanism includes a first conveyor and a second conveyor mounted on the frame. The first conveyor has a discharge port on one side of its tail end, and the second conveyor is located at the discharge port. A pushing mechanism is provided above the first conveyor at the discharge port to transfer cartons from the first conveyor to the second conveyor. Film cutting mechanisms are symmetrically provided on both sides of the middle of the first conveyor and on both sides of the discharge port. The film cutting mechanisms are mounted on the first conveyor via adjusting components. A film tearing mechanism is provided on the second conveyor. A receiving hopper is provided below the second conveyor, corresponding to the film tearing mechanism. A collecting mechanism for collecting and storing plastic film is provided on the frame below the receiving hopper.

[0005] Preferably, the first conveyor is a belt conveyor, and multiple positioning push plates are fixed at intervals on the belt surface of the belt conveyor.

[0006] Preferably, the film cutting mechanism includes a movable plate, a cutter, a spring assembly, and a limiting member. The adjusting assembly is mounted on the side of the first conveyor via a base. One end of the movable plate is horizontally rotatably mounted above the adjusting assembly. The cutter is fixed to the other end of the movable plate. The spring assembly and the limiting member are mounted on the adjusting assembly. The spring assembly is used to reset the movable plate after it swings, and the limiting member is used to limit the swing angle of the movable plate.

[0007] Preferably, the spring assembly includes a tension spring, with both ends of the tension spring fixedly connected to the middle of the adjusting assembly and the movable plate, respectively.

[0008] Preferably, the limiting component includes two limiting bolts, which are horizontally installed on the adjusting assembly and their ends are respectively located on both sides of the hinge point of the movable plate.

[0009] Preferably, the adjustment assembly includes a telescopic cylinder, a fixed plate, and an adjustment block. The telescopic cylinder is vertically mounted on the base, and the fixed plate is horizontally fixed to the piston rod of the telescopic cylinder. The adjustment block is horizontally adjustable and mounted above the fixed plate. The movable plate, the cutter, the spring assembly, and the limiting member are provided on the adjustment block.

[0010] Preferably, the pushing mechanism includes a horizontal drive assembly and a pusher plate. The horizontal drive assembly is horizontally mounted above the first conveyor, perpendicular to the feeding direction of the first conveyor, and the pusher plate is mounted on the output end of the horizontal drive assembly.

[0011] Preferably, the second conveyor is a roller conveyor; the film-tearing mechanism includes a first vertical drive component and a second vertical drive component arranged vertically and vertically respectively. The first vertical drive component is installed above the roller conveyor, and a first negative pressure suction nozzle and an air blowing nozzle are installed downward on the actuating end of the first vertical drive component; the second vertical drive component is located below the roller gap of the roller conveyor, and a second negative pressure suction nozzle is installed upward on the actuating end of the second vertical drive component; the air blowing nozzle is used to blow the torn plastic film downward to the collection mechanism for collection and storage.

[0012] Preferably, the collecting mechanism includes a collection box, a rotating shaft, a motor drive assembly, and a pressing bar. The collection box has an upward-facing opening located below the receiving hopper. Vertical movable slots are provided on both sides of the collection box. Rotating shafts are horizontally mounted on the frame outside the movable slots on both sides of the collection box. The two rotating shafts are driven by the motor drive assembly and rotate in opposite directions. One end of the pressing bar is vertically fixed on the rotating shaft, and the other end extends through the movable slot into the collection box to press the plastic film downward.

[0013] Preferably, a support roller is provided between the discharge port and the second conveyor.

[0014] The beneficial effects of this invention are as follows: 1. In this invention, the carton is placed on a belt conveyor and conveyed forward. When the carton comes into contact with the film cutting mechanism on both sides of the first conveyor for film cutting, the positioning push plate can push the carton forward from behind, providing a stable thrust for the carton conveying and preventing the carton from slipping on the first conveyor.

[0015] 2. When the carton is conveyed forward on the first conveyor, the film cutting mechanism on both sides of the first conveyor can cut the plastic film on the left and right sides of the carton. After the carton is conveyed to the tail of the first conveyor, when the pushing mechanism sends the carton from the discharge port to the second conveyor, the film cutting mechanism on both sides of the discharge port will cut the plastic film on the front and rear sides of the carton, thereby cutting the film on the side walls of the carton, making it easier for the subsequent film tearing mechanism to quickly tear off the film.

[0016] 3. The telescopic cylinder can drive the fixed plate, adjusting block, cutter and other structures to move up and down, thereby adjusting the cutting height of the cutter. By changing the fixing position of the fixing bolt in the adjusting hole of the fixed plate, the horizontal position of the adjusting block can be adjusted horizontally, thereby changing the distance between the two relative cutters, so that this device can be adapted to the use of opening cartons of different sizes.

[0017] 4. The distance between the two opposing cutters is slightly less than the width of the two cut surfaces of the carton. When the carton is conveyed past the two cutters, it will push against the cutters, causing them to swing and stretching the tension spring. Under the action of the tension spring, the blades of the cutters can effectively abut against the side wall of the carton. As the carton moves forward, it can cut and rip the film on the outside of the carton. After the carton passes, the movable plate and the cutters return to their original positions under the action of the tension spring.

[0018] 5. The swing amplitude of the movable plate can be effectively adjusted by adjusting the distance between the two limit bolts and the side wall of the movable plate.

[0019] 6. The cutters of the film cutting mechanism work in pairs to cut the plastic film along the four sides of the carton and send it to the roller conveyor. The first and second vertical drive components drive the corresponding negative pressure suction nozzles to actuate, which can adsorb the plastic film on the top and bottom surfaces of the carton. Then, the corresponding negative pressure suction nozzles are driven away from the carton, so that the upper and lower parts of the plastic film can be torn apart from the cut in the middle of the plastic film, realizing a fast film tearing operation.

[0020] 7. The plastic film torn off by the two negative pressure suction nozzles will be blown down through the air nozzle above, and then sent to the collection mechanism through the receiving hopper for collection and storage.

[0021] 8. After the plastic film falls into the collection box through the receiving hopper, the motor drive assembly drives the rotating shafts on both sides to rotate, which in turn drives the pressing strips to rotate at a certain angle, so that the pressing strips on both sides rotate from top to bottom, thereby pressing the loose plastic film in the collection box downwards and improving the collection capacity of the collection box. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the installation of the first and second conveyors of the present invention; Figure 3 This is a schematic diagram of the film cutting mechanism of the present invention; Figure 4 This is a schematic diagram showing the installation of the telescopic cylinder, fixing plate, and adjusting block of the present invention; Figure 5 This is a schematic diagram of the film-tearing mechanism of the present invention; Figure 6This is a schematic diagram of the structure of the second vertical drive component of the present invention; Figure 7 This is a schematic diagram of the installation of the collection mechanism of the present invention; Figure 8 This is a schematic diagram of the collection mechanism of the present invention. Detailed Implementation

[0023] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] like Figure 1 As shown, this invention proposes a carton unwrapping machine, including a frame 1 and a conveying mechanism. The conveying mechanism includes a first conveyor 2 and a second conveyor 5 mounted on the frame 1. The first conveyor 2 is a belt conveyor, and multiple positioning push plates are fixedly arranged at intervals on the belt surface of the belt conveyor. The carton is placed on the belt conveyor and conveyed forward. When the carton contacts the film cutting mechanism 3 on both sides of the first conveyor 2 for film cutting operation, the positioning push plates 21 can push the carton forward from behind, providing a stable thrust for the carton conveying and preventing the carton from slipping on the first conveyor 2.

[0025] like Figure 2 As shown, a discharge port 20 is provided on one side of the tail of the first conveyor 2, and the second conveyor 5 is arranged parallel to the discharge port 20. A pushing mechanism is provided above the first conveyor 2 at the discharge port 20. The pushing mechanism is used to send the cartons on the first conveyor 2 from the discharge port 20 to the second conveyor 5. The pushing mechanism includes a horizontal drive assembly 4 and a pusher plate 41. The horizontal drive assembly 4 can be a rodless cylinder, which is horizontally mounted above the first conveyor 2 perpendicular to the feeding direction. The pusher plate 41 is installed below the slider of the rodless cylinder. The rodless cylinder drives the pusher plate 41 to move horizontally, which can push the cartons on the first conveyor 2 to the second conveyor 5 through the discharge port 20. Furthermore, a support roller 22 is provided between the discharge port 20 and the second conveyor 5. The support roller 22 can provide effective support when the cartons are transferred to the second conveyor 5 through the discharge port 20, and the rolling support between the support roller 22 and the bottom of the cartons can also reduce the friction between them.

[0026] Film cutting mechanisms 3 are symmetrically provided on both sides of the middle section of the first conveyor 2 and on both sides of the discharge port 20. When the carton is conveyed forward on the first conveyor 2, the film cutting mechanisms 3 on both sides of the first conveyor 2 can cut the plastic film on the left and right sides of the carton. After the carton is conveyed to the tail of the first conveyor 2, when the pushing mechanism sends the carton from the discharge port 20 to the second conveyor 5, the film cutting mechanisms 3 on both sides of the discharge port 20 will cut the plastic film on the front and rear sides of the carton, thereby cutting the film on the side walls of the carton, making it easier for the subsequent film tearing mechanism to quickly tear off the film.

[0027] likeFigures 3-4 As shown, the film cutting mechanism 3 includes a base 31, a movable plate 37, a cutter 38, a spring assembly, and a limiting component. The base 31 is fixed to the side of the first conveyor 2. A telescopic cylinder 32, a fixed plate 33, and an adjusting block are mounted on the base 31. The telescopic cylinder 32 (which can be a pneumatic cylinder structure) is vertically mounted on the base 31. The fixed plate 33 is horizontally fixed to the piston rod of the telescopic cylinder 32. The adjusting block is horizontally adjustable and mounted above the fixed plate 33. Specifically, the fixed plate 33 has an adjusting hole 330, and the adjusting block can be adjusted and fixed within the adjusting hole 330 by fixing bolts. The movable plate 37, the cutter 38, the spring assembly, and the limiting component are mounted on the adjusting block. The telescopic cylinder 32 can drive the fixed plate 33, adjusting block, cutter 38 and other structures to move up and down, thereby adjusting the cutting height of the cutter 38. By changing the fixing position of the fixing bolt in the adjusting hole 330 on the fixed plate 33, the horizontal position of the adjusting block can be adjusted horizontally, thereby changing the distance between the two cutters 38, so that the device can be adapted to the use of opening cartons of different sizes.

[0028] In this embodiment, the adjusting plate 34 has an L-shaped structure, and one end of the movable plate 37 is horizontally rotatably mounted above the horizontal part of the adjusting plate 34. The cutter 38 is fixedly mounted on the other end of the movable plate 37. The cutter 38 is a circular cutter 38. A spring assembly is mounted on the base 31 for the movable plate 37 to return to its original position after swinging. The spring assembly includes a tension spring 36, with both ends of the tension spring 36 fixedly connected to the middle of the base 31 and the movable plate 37, respectively, causing the cutter 38 to tilt horizontally in the opposite direction of the feeding of the first conveyor 2 or the opposite direction of the pushing of the pushing mechanism.

[0029] The distance between the two opposing cutters 38 is slightly less than the width of the two cut surfaces of the carton. When the carton is conveyed past the two cutters 38, it will push against the cutters 38, causing them to swing and stretching the tension spring 36. Under the elastic force of the tension spring 36, the blade of the cutter 38 can effectively abut against the side wall of the carton, cutting the outer film of the carton as it moves forward. After the carton passes, the movable plate 37 and the cutters 38 return to their original positions under the elastic force of the tension spring 36.

[0030] The limiting component is used to limit the swing angle of the movable plate 37. The limiting component includes two limiting bolts 35, which are horizontally installed on the vertical part of the adjusting plate 34, with their ends respectively located on both sides of the hinge point of the movable plate 37. By adjusting the distance between the two limiting bolts 35 and the side wall of the movable plate 37, the forward and backward swing amplitude of the movable plate 37 can be adjusted.

[0031] like Figures 5-6As shown, a film-tearing mechanism is provided on the second conveyor 5. The second conveyor 5 is a roller conveyor. The film-tearing mechanism includes a first vertical drive assembly 6 and a second vertical drive assembly 7, arranged vertically. The first vertical drive assembly 6 is mounted above the roller conveyor, and a first negative pressure suction nozzle 61 and an air blowing nozzle 62 are mounted downwards on the actuating end of the first vertical drive assembly 6. The first vertical drive assembly 6 can adopt the existing structure of a motor driving a sprocket to drive the platform's lifting and lowering. The second vertical drive assembly 7 is correspondingly located below the roller gap of the roller conveyor, and a second negative pressure suction nozzle 71 is mounted upwards on the actuating end of the second vertical drive assembly 7. The second vertical drive assembly 7 can adopt a cylinder structure. The negative pressure suction nozzle and the air blowing nozzle 62 are respectively connected to an external negative pressure mechanism and a high-pressure air source.

[0032] The plastic film on the cardboard box is cut along the four sides of the box by the cutting blades 38 of the film cutting mechanism 3 in pairs and then sent to the roller conveyor. The first vertical drive assembly 6 and the second vertical drive assembly 7 drive the corresponding negative pressure suction nozzles to actuate, which can adsorb the plastic film on the top and bottom surfaces of the cardboard box. Then, the corresponding negative pressure suction nozzles are driven away from the cardboard box, and the plastic film is torn apart from the middle cut, realizing a rapid film tearing operation. The plastic film torn off by the two negative pressure suction nozzles is blown down by high-pressure gas blown by the air blowing nozzle 62 above, and then sent to the collection mechanism through the receiving hopper 51 for collection and storage.

[0033] like Figures 7-8 As shown, a collection mechanism for collecting and storing plastic film is provided below the roller conveyor. A receiving hopper 51 is also provided below the roller conveyor; plastic film blown off by the air nozzle 62 is sent to the collection mechanism through the receiving hopper 51. The collection mechanism includes a collection box 81, a rotating shaft 82, a motor drive assembly, and a pressing bar 84. The collection box 81 is located below the receiving hopper 51 with its opening facing upwards. Vertical movable slots 810 are provided on both sides of the collection box 81. Rotating shafts 82 are horizontally mounted on the frame outside the movable slots 810 on both sides of the collection box 81. The two rotating shafts 82 are driven by the motor drive assembly and rotate in opposite directions. One end of the pressing bar 84 is vertically fixed to the rotating shaft 82, and the other end extends through the movable slot 810 into the collection box 81 to press the plastic film downwards. In this embodiment, the motor drive assembly includes a drive motor 831, a chain 832, and gears 833. The gears 833 are mounted on the ends of corresponding rotating shafts 82. The drive motor 831 meshes with the two gears 833 through the chain 832, thereby enabling the two rotating shafts 82 to rotate in opposite directions, which in turn drives the pressure bar 84 to rotate. The pressure bar 84 can be made of a flexible material that can deform.

[0034] After the plastic film falls into the collection box 81 through the receiving hopper 51, the motor drive assembly drives the rotating shafts 82 on both sides to rotate, which in turn drives the pressing strips 84 to rotate at a certain angle, so that the pressing strips 84 on both sides rotate from top to bottom, thereby pressing the loose plastic film in the collection box 81 downward and improving the collection capacity of the collection box 81.

[0035] When using this invention, the carton is conveyed by the first conveyor 2 and first passes through the first set of film-cutting mechanisms 3, which can cut the plastic film on the left and right sides of the carton. After the carton is conveyed to the tail of the first conveyor 2, the pushing mechanism sends the carton from the discharge port 20 to the second conveyor 5. At the same time, the film-cutting mechanisms 3 on both sides of the discharge port 20 will cut the plastic film on the front and rear sides of the carton. Then, the first vertical drive assembly 6 and the second vertical drive assembly 7 drive the corresponding negative pressure suction nozzle to tear the upper and lower parts from the cut in the middle of the plastic film, realizing a rapid film tearing operation. The carton after film tearing can be conveyed to the next process by the second conveyor 5. High-pressure gas is introduced into the air nozzle 62, which can blow the torn plastic film downwards and drop it into the collection box 81 through the receiving hopper 51. Then, the motor drive assembly drives the rotating shafts 82 and the pressing strips 84 on both sides to rotate at a certain angle, so that the pressing strips 84 on both sides press the loose plastic film downwards and improve the collection capacity of the collection box 81.

[0036] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A carton film-opening machine, comprising a frame and a conveying mechanism, characterized in that: The conveying mechanism includes a first conveyor and a second conveyor mounted on a frame. The first conveyor has a discharge port on one side of its tail end, and the second conveyor is located at the discharge port. Above the first conveyor at the discharge port, a pushing mechanism is provided to transfer cartons from the first conveyor to the second conveyor. Film cutting mechanisms are symmetrically arranged on both sides of the middle of the first conveyor and on both sides of the discharge port. The film cutting mechanisms are mounted on the first conveyor via adjusting components. A film tearing mechanism is provided on the second conveyor. A receiving hopper is located below the second conveyor, corresponding to the film tearing mechanism. Below the receiving hopper, on the frame, is a collecting mechanism for collecting and storing plastic film. The film cutting mechanism includes a movable plate, a cutter, a spring assembly, and a limiting component. The adjusting component is mounted on the side of the first conveyor via a base. One end of the movable plate is horizontally rotatably mounted above the adjusting component. The cutter is fixed to the other end of the movable plate. The spring assembly and the limiting component are mounted on the adjusting component. The spring assembly is used to reset the movable plate after it swings, and the limiting component is used to limit the swing angle of the movable plate. The spring assembly includes a tension spring, with both ends of the tension spring fixedly connected to the middle of the adjusting assembly and the movable plate, respectively. The limiting component includes two limiting bolts, which are horizontally installed on the adjusting assembly and their ends are respectively located on both sides of the hinge point of the movable plate. The adjustment assembly includes a telescopic cylinder, a fixed plate, and an adjustment block. The telescopic cylinder is vertically mounted on the base, and the fixed plate is horizontally fixed to the piston rod of the telescopic cylinder. The adjustment block is horizontally adjustable and mounted above the fixed plate. The movable plate, the cutter, the spring assembly, and the limiting member are provided on the adjustment block. The second conveyor is a roller conveyor; the film-tearing mechanism includes a first vertical drive assembly and a second vertical drive assembly arranged vertically and vertically. The first vertical drive assembly is installed above the roller conveyor, and a first negative pressure suction nozzle and an air blowing nozzle are installed downwards on the actuating end of the first vertical drive assembly; the second vertical drive assembly is located below the roller gap of the roller conveyor, and a second negative pressure suction nozzle is installed upwards on the actuating end of the second vertical drive assembly; the air blowing nozzle is used to blow the torn plastic film downwards to the collection mechanism for collection and storage; The collection mechanism includes a collection box, a rotating shaft, a motor drive assembly, and a pressing bar. The collection box has an upward-facing opening located below the receiving hopper. Vertical movable slots are provided on both sides of the collection box. Rotating shafts are horizontally mounted on the frame outside the movable slots on both sides of the collection box. The two rotating shafts are driven by the motor drive assembly and rotate in opposite directions. One end of the pressing bar is vertically fixed on the rotating shaft, and the other end extends through the movable slot into the collection box to press the plastic film downward.

2. The carton film-opening machine according to claim 1, characterized in that: The first conveyor is a belt conveyor, and multiple positioning push plates are fixed at intervals on the belt surface of the belt conveyor.

3. The carton film-opening machine according to claim 1, characterized in that: The feeding mechanism includes a horizontal drive component and a pusher plate. The horizontal drive component is horizontally mounted above the first conveyor, perpendicular to the feeding direction of the first conveyor, and the pusher plate is mounted on the output end of the horizontal drive component.

4. The carton film-opening machine according to claim 1, characterized in that: Support rollers are provided between the discharge port and the second conveyor.

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