A film pressing device for a hard box stretch film packaging machine

Abstract

The utility model relates to the technical fields of packing machine especially, it is a kind of hard box stretch film packing machine press film device, it can be with the upper end edge of the special compression of film and forming box, improve the sealing connection between forming box and film;Including film mounting shaft and film reel, film reel is loaded on film mounting shaft, film mounting shaft is installed on the rack of packing machine;It further includes multiple push cylinder one, roller stand, front roller, rear roller and multiple compression belts, the fixed end of multiple push cylinder one is installed on the rack of packing machine, the lower end of piston rod of multiple push cylinder one is connected with roller stand, front roller is rotatably installed at one end of push cylinder one close to film reel, rear roller is rotatably installed at one end of push cylinder one away from film reel, multiple annular grooves are set on front roller and rear roller, multiple annular grooves on front roller and rear roller are respectively front and back alignment, multiple compression belts are respectively sleeved in multiple annular grooves of front roller and rear roller.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging machines, and in particular to a film pressing device for a rigid box stretch film packaging machine. Background Technology

[0002] The rigid box stretch film packaging machine is a new type of packaging machine. This packaging machine heats and stretches the roll of stretch film, and forms a packaging box of a specific shape under the action of a mold. Then, the upper film is pressed on the packaging box and the upper film and the packaging box are sealed. After subsequent cutting, the packaging of individual products is completed. Chinese utility model patent CN216995024U discloses a double-chamber vacuum skin packaging machine. This machine includes a film-pressing device comprising a support, an upper film-pressing roller, a lower film-pressing roller, and a cutting plate. The support is mounted on the cutting plate, which is mounted on the lower vacuum chamber. The lower film-pressing roller is rotatably connected to the support at both ends. The upper film-pressing roller is mounted above the lower film-pressing roller. The support has an elongated slot, and the upper film-pressing roller is movably connected to the elongated slot on the support at both ends. The machine also includes a cylinder mounting plate, a cylinder, and a cutter. The cylinder is mounted on a cylinder fixing plate, and the cutter is mounted on the output shaft of the cylinder. The cutter passes through the cutting plate and operates within the groove of the fixing seat of the film-pressing device.

[0003] However, the above-mentioned film pressing device only presses one end of the upper film onto the forming box of the lower film through the film pressing roller, and cannot specifically press the upper film and the upper edge of the forming box, resulting in poor sealing connection between the forming box and the upper film. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a film pressing device for a rigid box stretch film packaging machine that can specifically press the upper film to the upper edge of the forming box, thereby improving the sealing connection between the forming box and the upper film.

[0005] This utility model discloses a film pressing device for a rigid box stretch film packaging machine, comprising an upper film mounting shaft and an upper film roll shaft. The upper film roll shaft is mounted on the upper film mounting shaft, which is installed on the frame of the packaging machine. It also includes multiple push cylinders, a roller frame, a front roller, a rear roller, and multiple pressing belts. The fixed ends of the multiple push cylinders are installed on the frame of the packaging machine, and the lower ends of the piston rods of the multiple push cylinders are connected to the roller frame. The front roller is rotatably mounted on the end of the push cylinder near the upper film roll shaft, and the rear roller is rotatably mounted on the end of the push cylinder away from the upper film roll shaft. Multiple annular guide grooves are provided on both the front and rear rollers, and these grooves are aligned front to back. Multiple pressing belts are respectively fitted onto the front and rear rollers. In the multiple annular guide grooves of the front and rear rollers, the upper film roll is loaded onto the upper film mounting shaft, and the end of the upper film is pulled out from the upper film roll and passed under the roller frame, so that the upper film covers multiple food-filled forming boxes on the packaging machine. The piston rods of multiple push cylinders extend downwards simultaneously, causing the roller frame to descend. At this time, the front and rear rollers roll the front and rear ends of the upper film, and at the same time, multiple pressing belts press the upper film tightly on the end face between the seals of multiple forming boxes. At this time, the upper film and multiple forming boxes are sealed. Compared with the existing technology, the upper film and the upper edge of the forming box can be specially pressed, improving the sealing connection between the forming box and the upper film.

[0006] Preferably, it also includes multiple pressing strips, which are evenly installed on multiple pressing belts and arranged perpendicularly to the multiple pressing belts; the multiple pressing strips are used to press the transverse end faces between the upper film and the seals of the multiple forming boxes, thereby improving the sealing connection between the forming boxes and the upper film.

[0007] Preferably, it also includes an arm plate and a tensioning roller. The lower end of the arm plate is mounted on the roller frame, and the tensioning roller is rotatably mounted on the upper end of the arm plate. The tensioning roller tensions multiple compression bands from the inside upwards. The tensioning action of the arm plate and the tensioning roller keeps the multiple compression bands in a taut state, thereby improving the sealing effect.

[0008] Preferably, it also includes a telescopic push rod, with the lower end of the arm plate rotatably mounted to the roller frame, one end of the telescopic push rod rotatably connected to the roller frame, and the other end of the telescopic push rod rotatably connected to the arm plate; adjusting the length of the telescopic push rod allows it to adjust the pitch angle of the arm plate, thereby adjusting the tensioning effect of the tensioning roller on the multiple pressing belts.

[0009] Preferably, it also includes a long slot and a nut. The long slot is provided at the end of the roller frame away from the upper film roll. The end of the central shaft of the rear roller is slidably installed in the long slot. The nut is screwed onto the end of the central shaft of the rear roller. The nut screws and fastens the central shaft of the rear roller onto the roller frame. The installation position of the rear roller is adjusted along the long slot and locked by the nut, thereby adjusting the gap between the front roller and the rear roller, so that the pressure belt can adapt to the forming box of different lengths. During the adjustment process, the tension roller rises and falls adaptively, improving versatility.

[0010] Preferably, it also includes a swing arm and a guide roller. One end of the swing arm is mounted on the end of the roller frame near the upper film roll, and the guide roller is rotatably mounted on the other end of the swing arm. The guide roller is used to roll the upper film. The guide roller rolls and presses the upper film drawn out from the upper film roll in front of multiple forming boxes to achieve rolling guidance of the upper film.

[0011] Preferably, it also includes a servo motor, a torque arm, and a pull rod. The servo motor is mounted on the roller frame, and the output shaft of the servo motor is connected to the inner end of the torque arm. The outer end of the torque arm is rotatably connected to one end of the pull rod, and the other end of the pull rod is rotatably connected to the swing arm. The servo motor drives the torque arm to rotate, and the torque arm drives the swing arm to pitch and rotate through the pull rod, thereby adjusting the height of the guide roller and realizing different rolling guidance effects on the upper film.

[0012] Compared with the prior art, the beneficial effects of this utility model are: it can specially press the upper film and the upper edge of the molding box together, thereby improving the sealing connection between the molding box and the upper film. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a schematic diagram of the isometric structure of this utility model; Figure 4 It is a structural diagram of the roller frame, front roller, rear roller, arm plate, tension roller, telescopic push rod and long slot hole, etc. Figure 5 This is a structural diagram of components such as the clamping belt and clamping strip; Figure 6 It is a structural diagram of the roller frame, front roller, swing arm, guide roller, servo motor, torsion arm and tie rod.

[0014] The following are labels in the attached diagram: 1. Upper film mounting shaft; 2. Upper film roll; 3. Push cylinder one; 4. Roller frame; 5. Front roller; 6. Rear roller; 7. Pressure belt; 8. Pressure strip; 9. Arm plate; 10. Tension roller; 11. Telescopic push rod; 12. Long slot hole; 13. Nut; 14. Swing arm; 15. Guide roller; 16. Servo motor; 17. Torque arm; 18. Pull rod. Detailed Implementation

[0015] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0016] like Figures 1 to 5As shown, a film pressing device for a rigid box stretch film packaging machine includes an upper film mounting shaft 1 and an upper film roll 2. The upper film roll 2 is mounted on the upper film mounting shaft 1, which is mounted on the frame of the packaging machine. It also includes multiple push cylinders 3, a roller frame 4, a front roller 5, a rear roller 6, and multiple pressing belts 7. The fixed ends of the multiple push cylinders 3 are mounted on the frame of the packaging machine, and the lower ends of the piston rods of the multiple push cylinders 3 are connected to the roller frame 4. The front roller 5 is rotatably mounted on the end of the push cylinder 3 near the upper film roll 2, and the rear roller 6 is rotatably mounted on the end of the push cylinder 3 away from the upper film roll 2. Multiple annular guide grooves are provided on both the front roller 5 and the rear roller 6, and these grooves are aligned front to back. The multiple pressing belts 7 are respectively fitted into the multiple annular guide grooves of the front roller 5 and the rear roller 6. Furthermore, it includes multiple pressing strips 8, which are evenly mounted on the multiple pressing belts 7 and arranged perpendicularly to them.

[0017] The upper film roll 2 is loaded onto the upper film mounting shaft 1, and the end of the upper film is pulled out from the upper film roll 2 and passed under the roller frame 4, so that the upper film covers multiple food-filled forming boxes on the packaging machine. The piston rods of multiple push cylinders 3 extend downward simultaneously, causing the roller frame 4 to descend. At this time, the front roller 5 and the rear roller 6 roll and press the front and rear ends of the upper film. At the same time, multiple pressing belts 7 press the upper film on the end face between the seals of multiple forming boxes, and multiple pressing strips 8 press the transverse end face between the upper film and the seals of multiple forming boxes. At this time, the upper film and multiple forming boxes are sealed. Compared with the existing technology, the upper film and the upper edge of the forming box can be specially pressed, improving the sealing connection between the forming box and the upper film. Example 2

[0018] like Figures 1 to 4 As shown, based on Embodiment 1, it also includes an arm plate 9 and a tension roller 10. The lower end of the arm plate 9 is mounted on the roller frame 4, and the tension roller 10 is rotatably mounted on the upper end of the arm plate 9. The tension roller 10 tensions multiple pressing belts 7 from the inside upwards. It also includes a telescopic push rod 11. The lower end of the arm plate 9 is rotatably mounted to the roller frame 4. One end of the telescopic push rod 11 is rotatably connected to the roller frame 4, and the other end of the telescopic push rod 11 is rotatably connected to the arm plate 9. It also includes a long slot 12 and a nut 13. The long slot 12 is provided at the end of the roller frame 4 away from the upper film roll 2. The end of the central shaft of the rear roller 6 is slidably mounted in the long slot 12. The nut 13 is rotatably screwed onto the end of the central shaft of the rear roller 6. The nut 13 screws and fastens the central shaft of the rear roller 6 onto the roller frame 4.

[0019] Adjusting the length of the telescopic push rod 11 allows the telescopic push rod 11 to adjust the pitch angle of the arm plate 9. The tensioning action of the arm plate 9 and the tensioning roller 10 keeps the multiple pressing bands 7 taut, thereby adjusting the tensioning effect of the tensioning roller 10 on the multiple pressing bands 7. Adjusting the installation position of the rear roller 6 along the long slot 12 and locking it with the nut 13 adjusts the distance between the front roller 5 and the rear roller 6, so that the pressing bands 7 can adapt to forming boxes of different lengths, improving versatility. During the adjustment process, the tensioning roller 10 rises and falls adaptively. Example 3

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, based on Embodiment 1, it also includes a swing arm 14 and a guide roller 15. One end of the swing arm 14 is mounted on the end of the roller frame 4 near the upper film roll 2, and the guide roller 15 is rotatably mounted on the other end of the swing arm 14. The guide roller 15 is used to roll the upper film. It also includes a servo motor 16, a torque arm 17 and a pull rod 18. The servo motor 16 is mounted on the roller frame 4. The output shaft of the servo motor 16 is connected to the inner end of the torque arm 17. The outer end of the torque arm 17 is rotatably connected to one end of the pull rod 18, and the other end of the pull rod 18 is rotatably connected to the swing arm 14.

[0021] The guide roller 15 rolls and presses the upper film drawn from the upper film roll 2 in front of multiple forming boxes to achieve rolling guidance of the upper film. The servo motor 16 drives the torque arm 17 to rotate, and the torque arm 17 drives the swing arm 14 to pitch and rotate through the pull rod 18, thereby adjusting the height of the guide roller 15 and achieving different rolling guidance effects on the upper film.

[0022] like Figures 1 to 6 As shown, the film pressing device of the rigid box stretch film packaging machine of this utility model first adjusts the distance between the rear roller 6 and the front roller 5 according to the specifications of the formed box and locks it with the nut 13. Then, the upper film roll 2 is loaded onto the upper film mounting shaft 1, and the end of the upper film is pulled out from the upper film roll 2, rolled and guided by the guide roller 15, and passed under the roller frame 4, so that the upper film covers multiple formed boxes containing food on the packaging machine. Then, the piston rods of multiple push cylinders 3 extend downward simultaneously, causing the roller frame 4 to descend, so that the front roller 5 and the rear roller 6 roll and press the front and rear ends of the upper film. At the same time, multiple pressing belts 7 press the upper film on the end face between the seals of multiple formed boxes, and multiple pressing strips 8 press the transverse end face between the upper film and the seals of multiple formed boxes. Finally, the upper film and multiple formed boxes are sealed.

[0023] The main functions achieved by this utility model are: 1. It can specifically press the upper film to the upper edge of the forming box, improving the sealing connection between the forming box and the upper film; 2. Adjust the distance between the front roller 5 and the rear roller 6 to accommodate molding boxes of different lengths and improve versatility; 3. The upper film is guided by the guide roller 15 to improve the pressing effect.

[0024] The film pressing device for a rigid box stretch film packaging machine of this utility model has common mechanical installation, connection and setting methods. As long as it can achieve its beneficial effect, it can be implemented. The upper film mounting shaft 1, upper film roll 2, push cylinder 1 3, front roller 5, rear roller 6, pressing belt 7, pressing strip 8, tension roller 10, telescopic push rod 11, nut 13, guide roller 15, servo motor 16, torque arm 17 and pull rod 18 of the film pressing device of this utility model are purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0025] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A film pressing device for a rigid box stretch film packaging machine, comprising an upper film mounting shaft (1) and an upper film roll (2), wherein the upper film roll (2) is mounted on the upper film mounting shaft (1), and the upper film mounting shaft (1) is mounted on the frame of the packaging machine; characterized in that, It also includes multiple push cylinders (3), roller frame (4), front roller (5), rear roller (6) and multiple pressing belts (7). The fixed ends of multiple push cylinders (3) are installed on the frame of the packaging machine. The lower ends of the piston rods of multiple push cylinders (3) are connected to the roller frame (4). The front roller (5) is rotatably installed on the end of push cylinder (3) near the upper film roll (2). The rear roller (6) is rotatably installed on the end of push cylinder (3) away from the upper film roll (2). Multiple annular guide grooves are provided on both the front roller (5) and the rear roller (6). The multiple annular guide grooves on the front roller (5) and the rear roller (6) are aligned front and back respectively. Multiple pressing belts (7) are respectively fitted in the multiple annular guide grooves of the front roller (5) and the rear roller (6).

2. The film pressing device for a rigid box stretch film packaging machine as described in claim 1, characterized in that, It also includes multiple pressing strips (8), which are evenly installed on multiple pressing belts (7), and the multiple pressing strips (8) are arranged perpendicular to the multiple pressing belts (7).

3. The film pressing device for a rigid box stretch film packaging machine as described in claim 1, characterized in that, It also includes an arm plate (9) and a tension roller (10). The lower end of the arm plate (9) is mounted on the roller frame (4), and the tension roller (10) is rotatably mounted on the upper end of the arm plate (9). The tension roller (10) tensions multiple pressing bands (7) from the inside upwards.

4. The film pressing device for a rigid box stretch film packaging machine as described in claim 3, characterized in that, It also includes a telescopic push rod (11), the lower end of the arm plate (9) is rotatably mounted to the roller frame (4), one end of the telescopic push rod (11) is rotatably connected to the roller frame (4), and the other end of the telescopic push rod (11) is rotatably connected to the arm plate (9).

5. The film pressing device for a rigid box stretch film packaging machine as described in claim 4, characterized in that, It also includes a long slot (12) and a nut (13). The long slot (12) is provided at one end of the roller frame (4) away from the upper film roll (2). The end of the central shaft of the rear roller (6) is slidably installed in the long slot (12). The nut (13) is rotated and screwed onto the end of the central shaft of the rear roller (6). The nut (13) screws and fastens the central shaft of the rear roller (6) onto the roller frame (4).

6. The film pressing device for a rigid box stretch film packaging machine as described in claim 1, characterized in that, It also includes a swing arm (14) and a guide roller (15). One end of the swing arm (14) is mounted on the end of the roller frame (4) near the upper film roll (2), and the guide roller (15) is rotatably mounted on the other end of the swing arm (14). The guide roller (15) is used to roll the upper film.

7. The film pressing device for a rigid box stretch film packaging machine as described in claim 6, characterized in that, It also includes a servo motor (16), a torque arm (17) and a pull rod (18). The servo motor (16) is mounted on the roller frame (4). The output shaft of the servo motor (16) is connected to the inner end of the torque arm (17). The outer end of the torque arm (17) is rotatably connected to one end of the pull rod (18). The other end of the pull rod (18) is rotatably connected to the swing arm (14).

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