Cutting device for BOPP shrink film production

Abstract

The utility model discloses a cutting device for BOPP (biaxially-oriented polypropylene) shrink film production, which relates to the technical field of shrink films and comprises mounting boxes, an operating table is arranged at the rear end of each mounting box, and an unwinding roller is rotatably connected to the side of one end between the mounting boxes. And the output end of the driving motor extends into the mounting box and is provided with a correcting mechanism for centering the shrink film on the outer side of the winding roller. According to the cutting device for BOPP shrink film production, the output end of a driving motor rotates to drive a threaded rod to rotate, and the threaded rod is in threaded connection with a movable block during rotation, so that the movable block can be driven to move, and when the movable block is driven, a correcting block can be synchronously driven to slide on the outer side of a winding roller; the inner side edge of the correcting block can make contact with and push the edge of the divided shrink film, so that the edge of the divided shrink film can be kept in a neat state, and the problems of low quality and the like caused by edge dislocation when the shrink film is divided are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shrink film, specifically to a cutting device for BOPP shrink film production. BACKGROUND

[0002] The cutting equipment of shrink film plays an important role in the modern packaging industry. They can efficiently and accurately complete the cutting work of shrink film, improve production efficiency, and ensure the appearance and quality of packaging. By using the cutting equipment, the rolled shrink film can be cut and separated, and the rolled shrink film can be processed subsequently. During use, the traditional cutting equipment may cause the position of the winding part to deviate when rolling the material, which may result in low quality of the subsequent shrink film rolling.

[0003] To overcome the above-mentioned defects, the prior art (Chinese patent with publication number CN220331392U and publication date January 12, 2024) relates to a cutting device for shrink film production in the technical field of shrink film. The cutting device for shrink film production includes a cutting device main body, a bearing rod is arranged on the top of the cutting device main body, a cutting mechanism is arranged on one side of the bearing rod, and a positioning mechanism is arranged on the top of the cutting device main body. When the shrink film needs to be clamped and positioned, the fixed block is pulled upward first, so that the rotating disc is separated from the surface of the cutting device main body, then the shrink film is placed on the bottom of the rotating disc, and the rotating disc clamps and positions the shrink film. The device is convenient for clamping and positioning the shrink film.

[0004] The above-mentioned mechanism can limit the position of the shrink film by using the clamping and positioning device, but in actual use, the shrink film may deviate in position when rolling, which may result in uneven edges during subsequent rolling and low overall rolling quality. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a cutting device for BOPP shrink film production to solve the problem of low quality of the subsequent shrink film rolling caused by the deviation of the winding part position when the traditional cutting equipment rolls the material.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A cutting device for BOPP shrink film production, including packing, the rear end of packing is provided with operation platform, and the side of one end between packing is rotatably connected with unwinding roller, the top of packing is installed with gantry away from one side of unwinding roller, and one end between gantry is installed with guide rod, the below of guide rod is provided with cutting knife, and one side between unwinding roller and gantry is provided with connecting roller, and the other end of the side of packing is rotatably connected with winding roller, the side of the front end of packing is installed with driving motor, and the output of driving motor extends to the inside of packing and is provided with the mechanism of righting that carries out the righting of the shrink film outside winding roller and is handled, the mechanism of righting includes threaded rod, and the output of driving motor is connected with threaded rod through coupling, the outside of threaded rod is connected with two movable blocks, and the side of movable block is installed with righting block, and the outside of righting block is sleeved with winding roller, one end between unwinding roller and connecting roller is installed with adjusting roller, and the bottom of the front and rear ends of adjusting roller is installed with the tension adjusting mechanism for adjusting the tightness of shrink film.

[0007] Further, the diameter of the inside of the righting block is greater than the diameter of the winding roller, and the righting block is slidingly connected to the outside of the winding roller.

[0008] Further, a sliding groove is provided on the side of the inside of the packing close to the threaded rod, and a sliding block matched with the sliding groove is installed on the side of the movable block, and the sliding block is slidingly connected to the inside of the sliding groove.

[0009] Further, elastic air bags are installed on the side of the inside of the packing close to the gantry, and the elastic air bags are provided in the side wall of the packing, a pressing plate is installed on the front end of the elastic air bag, a pressing plate is installed on the side of the righting block, a connecting pipe is installed on one end between the elastic air bags, and a jet port is installed on the outside of the connecting pipe through a hose.

[0010] Further, the elastic air bags and the pressing plate are provided on the lower end of the gantry, and the elastic air bags are provided on one side of the winding roller.

[0011] Further, the tension adjusting mechanism includes a movable rod, and the movable rod is provided on both ends of the adjusting roller, a piston is fixedly connected to the bottom end of the movable rod, a fixed rod is sleeved on the outside of the piston, and a sliding mechanism is formed between the piston and the fixed rod.

[0012] Further, a return spring is installed on the bottom end of the piston, and an elastic structure is formed between the piston and the fixed rod through the return spring.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1. Drive the output end of the motor to rotate the threaded rod, the threaded rod is screwed with the movable block during rotation, so that the movable block is driven to move, the movable block is driven to drive the alignment block to slide outside the winding roller, the inner edge of the alignment block can contact the edge of the shrink film rolled out, and the edge of the rolled shrink film can be kept in order, avoiding the quality problem caused by edge misalignment during rolling.

[0015] Further, the movable block moves synchronously to drive the sliding block to slide inside the sliding groove, so that the movement of the sliding block is more smooth, avoiding the deflection of the sliding block during movement, thereby increasing the stability of the movable block during movement.

[0016] Further, the alignment block is driven to move outside the winding roller, which synchronously drives the pressing plate to move, and the pressing plate presses the extrusion plate when the alignment block is reset, so that the gas in the elastic air bag is output and delivered to the air outlet through the connecting pipe and the hose, and the air outlet can blow dust and impurities on the surface of the shrink film to be rolled, avoiding dust from being mixed into the rolled shrink film during subsequent rolling, thereby increasing the overall quality of the shrink film during rolling.

[0017] 2. The reset spring arranged at the bottom end of the movable rod can reset the adjusting roller when the position of the adjusting roller is changed by the shrink film, so that the shrink film wound outside the adjusting roller can be kept in a tight state, thereby enabling the winding roller to better roll the shrink film.

[0018] Further, the piston can increase the friction between the movable rod and the fixed rod, thereby increasing the resistance of the movable rod during upward and downward movement in the fixed rod, thereby making the overall rolling and cutting more stable. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view structure schematic diagram of the utility model.

[0020] Figure 2 It is a front view structure schematic diagram of the utility model.

[0021] Figure 3 It is an explosion structure schematic diagram of the tensioning mechanism of the utility model.

[0022] Figure 4 It is a structure schematic diagram of the alignment mechanism and the impurity removal mechanism of the utility model.

[0023] Figure 5The utility model discloses a structure schematic diagram of impurity removing mechanism.

[0024] Figure 6 The utility model discloses a structure schematic diagram of side view section.

[0025] In the drawing: 1, installation box, 2, operating platform, 3, unwinding roller, 4, adjusting roller, 5, connecting roller, 6, portal frame, 7, guide rod, 8, cutting knife, 9, movable rod, 10, piston, 11, reset spring, 12, fixed rod, 13, winding roller, 14, drive motor, 15, threaded rod, 16, movable block, 17, sliding slot, 18, sliding block, 19, correct block, 20, elastic air bag, 21, extrusion plate, 22, connecting pipe, 23, air jet, 24, pressing plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0027] Embodiment one: as Figure 1 , Figure 2 , Figure 4 and Figure 5The technical scheme is shown, in order to solve the traditional cutting device in the material is divided into volume, easy to appear winding part position offset condition, and then lead to subsequent in the shrink film is divided into volume quality low problem: the BOPP shrink film production cutting device, disclosed the mechanism, including the box 1, the box 1 rear end is provided with operation table 2, and the box 1 between one end of the side rotatingly connected with the unwinding roller 3, the box 1 top end away from the unwinding roller 3 side installation has gantry 6, and the gantry 6 between one end installation has guide rod 7, the guide rod 7 below is provided with cutting knife 8, and the unwinding roller 3 and the gantry 6 between one side is provided with connecting roller 5, the box 1 side another end rotatingly connected with the winding roller 13;The box 1 front end side installation has driving motor 14, and the driving motor 14 output end extends to the inside of the box 1 and is provided with the mechanism for the winding roller 13 outside shrink film to find the center processing, the mechanism includes threaded rod 15, and the threaded rod 15 is connected with the output end of driving motor 14 through the coupling, the threaded rod 15 outside is connected with two movable blocks 16, and the movable block 16 side installation has the righting block 19, the righting block 19 is set in the outside of winding roller 13;The righting block 19 inside diameter is greater than the diameter of winding roller 13, and the righting block 19 is slidingly connected to the outside of winding roller 13;The box 1 inside near threaded rod 15 one side is provided with sliding groove 17, and the movable block 16 side installation has the sliding block 18 matched with sliding groove 17, the sliding block 18 is slidingly connected to the inside of sliding groove 17.

[0028] In this case, the shrink film sleeve to be cut is set outside the unwinding roller 3, and the unwinding roller 3 cooperates with the motor to unwind the shrink film, wind the shrink film outside the adjusting roller 4 and the connecting roller 5, then wind one end of the shrink film outside the winding roller 13, use the winding roller 13 to divide the winding of the shrink film, after the winding is completed, adjust the position of the cutting knife 8 through the guide rod 7, and use the pneumatic telescopic rod installed at the top end of the cutting knife 8 to make the bottom end of the cutting knife 8 contact with the shrink film, thereby realizing the cutting of the shrink film; the output end of the driving motor 14 rotates to drive the threaded rod 15 to rotate, the threaded rod 15 is in threaded connection with the movable block 16 during rotation, so that the movable block 16 is driven to move, and the movable block 16 is driven to synchronously drive the aligning block 19 to slide outside the winding roller 13, the inner side edge of the aligning block 19 can contact and push the edge of the divided shrink film, so that the edge of the divided shrink film can be kept in order, avoiding the quality problem caused by edge misalignment during winding, and the thickness of the shrink film wound outside the winding roller 13 after winding is not higher than the height of the aligning block 19, so that the centering of the shrink film can be stably realized, thereby effectively improving the quality of the shrink film during winding; when the movable block 16 moves, the sliding block 18 synchronously slides in the sliding groove 17, so that the movement of the sliding block 18 is smoother, avoiding the deflection of the sliding block 18 when the movable block 16 drives the sliding block 18 to move, thereby increasing the stability of the movable block 16 during movement.

[0029] Embodiment two: as shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 The technical scheme is used to solve the problem that some impurities and debris may be left on the surface of the shrink film during winding, which may cause debris to be left in the shrink film during cutting, resulting in damage to the shrink film.

[0030] In this example, as the aligning block 19 moves outside the winding roller 13, it synchronously moves the pressing plate 24. When the aligning block 19 resets, the pressing plate 24 presses against the extrusion plate 21, causing the gas inside the elastic airbag 20 to be output through the connecting pipe 22 and the hose and delivered to the air nozzle 23. The air nozzle 23 can be used to blow away dust and remove impurities from the surface of the shrink film to be wound, preventing dust from getting trapped inside the wound shrink film during subsequent slitting, thus improving the overall quality of the shrink film during winding. The air inside the elastic airbag 20 is discharged through the connecting tube 22. To prevent dust from re-entering the hose through the jet nozzle 23 after the elastic airbag 20 is removed and reset, a one-way valve is added to the connecting hose at the jet nozzle 23. This effectively prevents dust from entering through the jet nozzle 23 and hose after the elastic airbag 20 is inhaled, and also effectively prevents the jet nozzle 23 from becoming blocked. At the same time, a one-way valve is also provided at the air inlet of the elastic airbag 20 to effectively prevent air from being squeezed out from the air inlet when the elastic airbag 20 is pressed.

[0031] Example 3: Figure 1 , Figure 2 , Figure 3 and Figure 6 The technical solution shown addresses the problem of insufficient tension in the shrink film during conveying, which can lead to loose winding. The BOPP shrink film production cutting device discloses a tension adjustment mechanism. An adjusting roller 4 is installed at one end between the unwinding roller 3 and the connecting roller 5. Tension adjustment mechanisms for adjusting the tension of the shrink film are installed at the bottom ends of both ends of the adjusting roller 4. The tension adjustment mechanism includes a movable rod 9, which is located at both ends of the adjusting roller 4. A piston 10 is fixedly connected to the bottom end of the movable rod 9, and a fixed rod 12 is sleeved on the outside of the piston 10, forming a sliding mechanism between the piston 10 and the fixed rod 12. A return spring 11 is installed at the bottom end of the piston 10, and the piston 10 and the fixed rod 12 form an elastic structure through the return spring 11.

[0032] In this example, the shrink film is wound around the outside of the adjusting roller 4. The return spring 11 at the bottom of the movable rod 9 can reset the adjusting roller 4 when its position changes due to the stretching of the shrink film. This keeps the shrink film wound around the outside of the adjusting roller 4 taut, allowing the take-up roller 13 to better take up the shrink film. Furthermore, the piston 10 increases the friction between the movable rod 9 and the fixed rod 12, increasing the resistance when the movable rod 9 moves up and down inside the fixed rod 12, thus making the overall slitting and cutting more stable.

[0033] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A cutting device for BOPP shrink film production, comprising a box (1), the rear end of the box (1) is provided with an operation table (2), and the side of one end of the box (1) is rotatably connected with a unwinding roller (3), the top end of the box (1) is installed with a gantry (6) away from the side of the unwinding roller (3), and one end between the gantry (6) is installed with a guide rod (7), the lower side of the guide rod (7) is provided with a cutting knife (8), and the side between the unwinding roller (3) and the gantry (6) is provided with a connecting roller (5), and the other end of the side of the box (1) is rotatably connected with a winding roller (13). characterized in that The side of the front end of the box (1) is installed with a driving motor (14), and the output end of the driving motor (14) extends to the inside of the box (1) and is provided with a centering mechanism for centering the shrink film outside the winding roller (13), the centering mechanism comprises a threaded rod (15), and the threaded rod (15) is connected with the output end of the driving motor (14) through a shaft coupling, the outer side of the threaded rod (15) is threadedly connected with two movable blocks (16), and the side of the movable block (16) is installed with a centering block (19), and the centering block (19) is sleeved on the outer side of the winding roller (13). One end between the unwinding roller (3) and the connecting roller (5) is installed with an adjusting roller (4), and the bottom ends of the front and rear ends of the adjusting roller (4) are installed with a tension adjusting mechanism for adjusting the tension of the shrink film.

2. The cutting device for BOPP shrink film production according to claim 1, characterized in that: The inside diameter of the centering block (19) is greater than the diameter of the winding roller (13), and the centering block (19) is slidably connected to the outer side of the winding roller (13).

3. The cutting device for BOPP shrink film production according to claim 2, characterized in that: The inside of the box (1) is provided with a sliding groove (17) near the threaded rod (15), and the side of the movable block (16) is installed with a sliding block (18) matched with the sliding groove (17), and the sliding block (18) is slidably connected to the inside of the sliding groove (17).

4. The cutting device for BOPP shrink film production according to claim 3, characterized in that: The inside of the box (1) is provided with a elastic air bag (20) near the gantry (6), and the elastic air bag (20) is arranged in the side wall of the box (1), the front end of the elastic air bag (20) is installed with a extrusion plate (21), the side of the centering block (19) is installed with a pressing plate (24), one end between the elastic air bags (20) is installed with a connecting pipe (22), and the outer side of the connecting pipe (22) is installed with a air outlet (23) through a hose.

5. The cutting device for BOPP shrink film production according to claim 4, characterized in that: The elastic air bag (20) and the extrusion plate (21) are arranged at the lower end of the gantry (6), and the elastic air bag (20) is arranged on one side of the winding roller (13).

6. The cutting device for BOPP shrink film production according to claim 1, characterized in that: The tension adjusting mechanism comprises a movable rod (9), and the movable rod (9) is arranged at both ends of the adjusting roller (4), the bottom end of the movable rod (9) is fixedly connected with a piston (10), the outer side of the piston (10) is sleeved with a fixed rod (12), and the piston (10) and the fixed rod (12) constitute a sliding mechanism.

7. The cutting device for BOPP shrink film production according to claim 6, characterized in that: The bottom end of the piston (10) is installed with a return spring (11), and the piston (10) and the fixed rod (12) constitute an elastic structure through the return spring (11).

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