BOPP (Biaxially-oriented Polypropylene) unwinding device

Abstract

The utility model discloses a BOPP (biaxially-oriented polypropylene) unwinding device, which belongs to the technical field of film unwinding devices and comprises a base, a distance adjusting mounting frame arranged on the upper end face of the base, a movable frame slidably mounted on the distance adjusting mounting frame, a conical pressing part used for being inserted into two ends of a paper tube of a BOPP film roll for clamping and fixing, and an anti-loosening pressing part mounted on the movable frame and used for providing rotation damping. According to the technical scheme, the distance between the movable frames is adjusted through the distance adjusting mounting frame, then the distance between the conical pressing pieces is adjusted, the conical pressing pieces are inserted into the two ends of a film roll paper tube, then clamping force is applied to achieve the fixing effect, and film rolls of different lengths and different calibers can be fixed; the anti-loosening pressing piece is in friction contact with the surface of the film roll, certain damping force is provided, and it is guaranteed that when unwinding is stopped, the BOPP film roll cannot continue to be unwound due to inertia rotation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a film unwinding device technical field, specifically a BOPP unwinding device. BACKGROUND

[0002] BOPP film, namely biaxially oriented polypropylene film, is an important soft packaging material without color, smell, taste and toxicity, with high tensile strength, impact strength, rigidity, toughness and good transparency and moisture resistance, and is widely used in food packaging, commodity packaging, industrial application and many other fields. After the production of BOPP film is completed, it is usually stored and transported in the form of a roll. In the use stage, the film needs to be unwound smoothly and continuously from the roll by the unwinding equipment, so as to carry out subsequent processing or application, such as coating, printing, compounding, etc. The unwinding process involves many technical points, including unwinding speed, tension control, film flatness, etc. The stability and flatness of unwinding directly affect the quality and efficiency of subsequent processing.

[0003] The utility model with publication number CN211971218U discloses a film unwinding and winding device, which solves the technical problem of complex structure of the film unwinding and winding device and is not easy to disassemble, and comprises a rack, a winding roller, an unwinding roller and a transition roller for winding and unwinding the film are sequentially arranged on the rack, a driving motor is arranged on the winding roller, a plurality of cross bars are arranged between the winding roller and the unwinding roller, and a detachable and movable deviation correcting assembly is arranged at both ends of the cross bar. The utility model has a structure for correcting the deviation direction of the film during unwinding and winding, and can simply and effectively correct the running direction of the film.

[0004] However, in the actual unwinding process, the object to be faced by the unwinding device is usually a roll that has been prepared, and in the above-mentioned device, the structure of the unwinding roller makes it difficult to efficiently fix the film roll of different lengths and diameters, and since the unwinding roller is relatively complicated to disassemble, it takes a long time to replace the next film roll after the current film roll is unwound, which is time-consuming. In addition, since the unwinding roller can rotate freely and lacks a limiting damping structure, it will have inertia when rotating under the action of the film tension, so that even when the film unwinding stops, the unwinding roller will still rotate for a certain number of turns, which will cause the film to be unwound for an extra length, resulting in wrinkles or adhesion of the film, or even reverse winding on the film roll, affecting the normal progress of subsequent unwinding work. Therefore, in view of the above problems, a BOPP unwinding device is proposed. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a BOPP unwinding device, the film unwinding device realizes the fixing of the film roll through two groups of symmetrically arranged conical compression members, when in use, the distance adjusting mounting frame is used to adjust the distance between the movable frames, and then the distance between the conical compression members is adjusted, so that the conical compression members are inserted into both ends of the film roll paper tube, and then a clamping force is applied to achieve the fixing effect, based on the above scheme, the fixing of film rolls with different lengths and different diameters can be realized, the utility model has a wide range of applications, and the film roll is very convenient to disassemble and assemble, and the working efficiency of unwinding can be significantly improved, in addition, the anti-loosening compression member is provided, and when unwinding, the anti-loosening compression member is in frictional contact with the surface of the film roll, a certain damping force is provided, the BOPP film roll is prevented from continuing to unwind due to inertial rotation when unwinding stops, and the technical problems that the device in the comparative technique cannot efficiently fix film rolls with different lengths and diameters, the disassembly and assembly are relatively complicated and time-consuming, and when unwinding stops, the unwinding roller still continues to rotate and more film bodies are unwound, which causes the film bodies to wrinkle or adhere to each other and affects the normal operation of the subsequent work are solved.

[0006] The technical scheme adopted by the embodiment of the application to solve the technical problems is:

[0007] The BOPP unwinding device comprises a base, a distance adjusting mounting frame is arranged on the upper end face of the base, a movable frame is slidably installed on the distance adjusting mounting frame and can be driven by the distance adjusting mounting frame to move linearly back and forth, a conical compression member is installed on the top of the movable frame and is rotationally connected with the movable frame, the conical compression member is in a whole conical shape and is used for being inserted into both ends of the paper tube of the BOPP film roll to clamp and fix, and an anti-loosening compression member is installed on the movable frame, when unwinding, the anti-loosening compression member is in frictional contact with the surface of the film roll, so that the BOPP film roll cannot rotate inertially, the distance between the movable frames is adjusted through the distance adjusting mounting frame, and then the distance between the conical compression members is adjusted, so that the conical compression members are inserted into both ends of the paper tube of the film roll, and then a clamping force is applied to achieve the fixing effect, based on the above scheme, the fixing of film rolls with different lengths and different diameters can be realized, the utility model has a wide range of applications, and the film roll is very convenient to disassemble and assemble, and the working efficiency of unwinding can be significantly improved, in addition, the anti-loosening compression member is provided, and when unwinding, the anti-loosening compression member is in frictional contact with the surface of the film roll, a certain damping force is provided, the BOPP film roll is prevented from continuing to unwind due to inertial rotation when unwinding stops.

[0008] In a possible implementation manner, the movable frame comprises a vertical plate, a sliding table is fixedly connected to the bottom end of the vertical plate, a mounting shaft cylinder is fixedly arranged at the top end of the vertical plate, a plurality of symmetrically arranged reinforcing rib plates are connected between the sliding table and the vertical plate, the above structure provides a necessary structural basis for the driving connection between the movable frame and the distance adjusting mounting frame, and provides a necessary structural basis for the installation of the conical compression member, and the reinforcing rib plates can enhance the strength of the connection between the sliding table and the vertical plate.

[0009] In a possible implementation, the distance adjusting mount comprises two symmetrically arranged end plates, two guide rods are arranged between the end plates, the sliding table is slidingly mounted on the guide rods, and a double-threaded screw is rotatably arranged between the guide rods and is in threaded connection with the sliding table, wherein the double-threaded screw is provided with equal-sized but oppositely directed threads on two sides, and when the double-threaded screw is screwed, it drives the sliding table in threaded connection therewith to move synchronously close to or away from each other, thereby adjusting the overall distance of the movable frame.

[0010] In a possible implementation, the conical pressing member comprises a rotating shaft rotatably mounted in the mounting shaft cylinder, the front end of the rotating shaft is fixedly connected with a limiting disc, the front end surface of the limiting disc is fixedly connected with a plug-in conical rod, a rubber conical cylinder is plugged on the plug-in conical rod, the rubber conical cylinder is inserted into the two end cylinder ports of the film roll to fix the roll cylinder, and since the rubber conical cylinder is conical, it can be adapted to paper cylinders of different diameters.

[0011] In a possible implementation, the surface of the rubber conical cylinder is initially provided with a plurality of anti-skid grooves arranged in a circumferential array, this structure can increase the friction between the rubber conical cylinder and the paper cylinder of the film roll, thereby improving the fixing effect, and the rubber conical cylinder is internally provided with a plug-in groove corresponding in size to the plug-in conical rod, the above structure can make the rubber conical cylinder have the characteristics of convenient disassembly and assembly, so that it can be adapted to the fixing work of a wider range of film rolls by replacing rubber conical cylinders of different sizes.

[0012] In a possible implementation, the anti-loosening pressing member comprises an adjusting frame on which a sliding seat plate is mounted, the adjusting frame is used to drive the sliding seat plate to move forward and backward to adjust the position, the end of the sliding seat plate is mounted with a rotatably connected cantilever rod, the end of the cantilever rod is fixedly mounted with an arc-shaped pressing plate in contact with the BOPP film roll, the contact between the arc-shaped pressing plate and the film roll can generate a certain damping to the film roll to prevent inertial sliding, and the cooperation between the adjusting frame and the sliding seat plate can adjust the initial distance between the arc-shaped pressing plate and the film roll, so that it can be adapted to film roll materials of different diameters.

[0013] In a possible implementation, the adjusting frame comprises a U-shaped plate, a sliding block is slidingly arranged in the U-shaped plate, and a rotatably connected adjusting screw is mounted on the U-shaped plate and is in threaded connection with the sliding block, a guide groove is formed in the U-shaped plate to guide the sliding of the sliding seat plate, and when the adjusting screw is screwed, it drives the sliding block to slide forward and backward, thereby driving the sliding seat plate connected therewith to move.

[0014] In a possible implementation, the sliding seat plate comprises an L-shaped plate, an end of which is fixedly provided with an axle end fixing sheet, an end of the cantilever rod is rotationally connected with the L-shaped plate and the axle end fixing sheet, and a torsional spring is sleeved on the end of the cantilever rod, one end of the torsional spring is fixedly connected with the cantilever rod, and the other end is fixedly connected with the axle end fixing sheet, the above structure can increase the pressure of the arc-shaped pressing plate on the film roll through the torsional spring, and prevent the pressure provided by the weight of the arc-shaped pressing plate from being too small to meet the minimum damping requirement, and the L-shaped plate is fixedly provided with a guide rib at a lower end face, which is slidably connected with a guide groove, and the structure can guide the sliding of the sliding seat plate and prevent deviation during sliding.

[0015] In summary, the utility model has the following beneficial technical effects:

[0016] The film unwinding device fixes the film roll through two groups of symmetrical conical pressing members, adjusts the distance between the movable frames through the distance adjusting mounting frame during use, and then adjusts the distance between the conical pressing members, so that the conical pressing members are inserted into both ends of the film roll paper tube and then clamped to achieve the fixing effect, based on the above scheme, the film roll of different lengths and different diameters can be fixed, and the utility range is wide, and the film roll is very convenient to disassemble and assemble, and the unwinding work efficiency can be significantly improved.

[0017] In addition, the anti-loosening pressing member is also provided, and when unwinding, the arc-shaped pressing plate can generate a certain damping on the film roll through the contact with the film roll, so that the inertial sliding of the film roll is prevented, and the initial distance between the arc-shaped pressing plate and the film roll can be adjusted through the cooperation of the adjusting frame and the sliding seat plate, so that the film roll material of different diameters can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the utility model, constitute a part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0019] Figure 1 It is a whole structure schematic view of the utility model;

[0020] Figure 2 It is a film roll clamping structure schematic view of the utility model;

[0021] Figure 3 It is an anti-loosening pressing member structure schematic view of the utility model;

[0022] Figure 4 It is an anti-loosening pressing member structure schematic view of the utility model;

[0023] In the figure: 1, base; 2, distance adjusting mounting frame; 21, end plate; 22, guide rod; 23, double-threaded screw rod; 3, movable frame; 31, vertical plate; 32, sliding table; 33, reinforcing rib plate; 34, mounting shaft cylinder; 4, conical compression part; 41, rotating shaft; 42, limiting disc; 43, plug-in conical rod; 44, rubber conical cylinder; 441, anti-skid groove; 442, plug-in groove; 5, anti-loosening compression part; 51, adjusting frame; 511, U-shaped plate; 512, sliding block; 513, adjusting screw; 514, guide groove; 52, sliding seat plate; 521, L-shaped plate; 522, shaft end fixing piece; 523, torsional spring; 524, guide rib; 53, cantilever rod; 54, arc-shaped compression plate. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the present application is to solve the problems in the above background art, and the general idea is as follows:

[0025] As shown in the figure, the BOPP unwinding device provided by the present embodiment comprises a base 1, an upper end surface of which is provided with a distance adjusting mounting frame 2, a movable frame 3 which is slidingly installed on the distance adjusting mounting frame 2 and can be driven by the distance adjusting mounting frame 2 to make reciprocating linear motion, a conical compression part 4 which is installed on the top of the movable frame 3 and is rotationally connected therewith, and an anti-loosening compression part 5 which is installed on the movable frame 3. Figure 1 When unwinding, the anti-loosening compression part 5 is in frictional contact with the surface of the film roll, so that the BOPP film roll cannot rotate by inertia. The distance between the movable frame 3 is adjusted by the distance adjusting mounting frame 2, and then the distance between the conical compression part 4 is adjusted, so that the conical compression part 4 is inserted into both ends of the paper cylinder of the film roll and a clamping force is applied to achieve the fixing effect. Based on the above scheme, the film roll of different lengths and different diameters can be fixed, which has a wide range of applications. At the same time, the film roll is very convenient to disassemble and assemble, which can significantly improve the work efficiency of unwinding. In addition, the anti-loosening compression part 5 is provided, which is in frictional contact with the surface of the film roll when unwinding, providing a certain damping force to ensure that the BOPP film roll will not continue to unwind due to inertia when the unwinding stops.

[0026] The movable frame 3 comprises a vertical plate 31, the bottom end of which is fixedly connected with a sliding table 32, and the top end of the vertical plate 31 is fixedly provided with a mounting shaft cylinder 34. A plurality of symmetrical reinforcing rib plates 33 are connected between the sliding table 32 and the vertical plate 31. The above structure provides the necessary structural basis for the driving connection of the movable frame 3 and the distance adjusting mounting frame 2, and provides the necessary structural basis for the installation of the conical compression part 4. The reinforcing rib plates 33 can enhance the strength of the connection between the sliding table 32 and the vertical plate 31. Figure 2

[0027] ​As a driving component cooperating with the movable frame 3, the distance adjusting mounting frame 2 comprises two symmetrically arranged end plates 21, between which two guide rods 22 are arranged, and a sliding table 32 is slidingly mounted on the guide rods 22, and a double-threaded screw 23 is rotatably arranged between the guide rods 22 and is in threaded connection with the sliding table 32, wherein the double-threaded screw 23 is provided with equal-sized but oppositely directed threads on both sides, and in use, the double-threaded screw 23 is screwed to drive the sliding table 32 in threaded connection therewith to move synchronously closer or farther away, thereby adjusting the overall distance of the movable frame 3, as shown in Figure 1 .

[0028] As shown in Figure 2 , the conical pressing member 4 comprises a rotating shaft 41 rotatably mounted in the mounting shaft cylinder 34, the front end of which is fixedly connected with a limiting disc 42, and the front end surface of the limiting disc 42 is fixedly connected with a plug-in conical rod 43, and a rubber conical cylinder 44 is plugged thereon, and the fixing of the winding drum is realized by the way of inserting the rubber conical cylinder 44 into the cylinder port at both ends of the film roll, and since the rubber conical cylinder 44 is conical, it can adapt to paper drums of different diameters; wherein the surface of the rubber conical cylinder 44 is provided with a plurality of anti-skid grooves 441 arranged in a circumferential array, which can increase the friction between the rubber conical cylinder 44 and the film roll paper drum, thereby improving the fixing effect, and the rubber conical cylinder 44 is internally provided with a plug-in groove 442 corresponding in size to the plug-in conical rod 43, and the above structure can make the rubber conical cylinder 44 have the characteristics of convenient disassembly and assembly, so that it can adapt to the fixing work of a wider range of film rolls by replacing rubber conical cylinders 44 of different sizes.

[0029] As shown in Figures 3-4 , the anti-loosening pressing member 5 comprises an adjusting frame 51 on which a sliding seat plate 52 is mounted, the adjusting frame 51 is used to drive the sliding seat plate 52 to move forward and backward to adjust the position, and the end portion of the sliding seat plate 52 is provided with a rotatably connected cantilever rod 53, the end portion of which is fixedly mounted with an arc-shaped pressing plate 54 in contact with the BOPP film roll, and the contact of the arc-shaped pressing plate 54 with the film roll can generate a certain damping to the film roll to prevent inertial sliding, and the cooperation of the adjusting frame 51 and the sliding seat plate 52 can adjust the initial distance between the arc-shaped pressing plate 54 and the film roll, so that it can adapt to film roll materials of different diameters.

[0030] The adjusting frame 51 comprises a U-shaped plate 511, wherein a sliding block 512 is slidingly arranged, and a rotationally connected adjusting screw 513 is arranged on the U-shaped plate 511 and is in threaded connection with the sliding block 512; a guide groove 514 is formed on the U-shaped plate 511 and is used to guide the sliding of the sliding seat plate 52; when in use, the adjusting screw 513 is screwed to drive the sliding block 512 to slide back and forth, thereby driving the sliding seat plate 52 connected with the sliding block 512 to move; the sliding seat plate 52 comprises an L-shaped plate 521, and an end portion of the L-shaped plate 521 is fixedly provided with an axle end fixed piece 522; the end portion of the cantilever rod 53 is rotationally connected with the L-shaped plate 521 and the axle end fixed piece 522, and the end portion of the cantilever rod 53 is sleeved with a torsion spring 523, one end of the torsion spring 523 is fixedly connected with the cantilever rod 53, and the other end is fixedly connected with the axle end fixed piece 522; the above structure can increase the pressure applied by the arc-shaped pressing plate 54 to the film roll through the torsion spring 523, so as to prevent the pressure provided by the weight of the arc-shaped pressing plate 54 from being too small to meet the minimum damping requirement; the lower end surface of the L-shaped plate 521 is fixedly provided with a guide rib 524 which is slidingly connected with the guide groove 514; this structure can guide the sliding of the sliding seat plate 52 and prevent it from deviating during the sliding process.

[0031] The use principle and use process of the utility model are as follows:

[0032] In use, the distance adjusting mounting frame 2 is used to adjust the distance between the movable frames 3, thereby adjusting the distance between the conical pressing members 4, so that the conical pressing members 4 are inserted into both ends of the film roll paper tube and then a clamping force is applied to achieve a fixing effect; since the rubber conical cylinder 44 is conical, it can be adapted to paper tubes of different diameters; in addition, the surface of the rubber conical cylinder 44 is provided with a plurality of anti-skid grooves 441 arranged in a circumferential array, which can increase the friction between the rubber conical cylinder 44 and the film roll paper tube, thereby improving the fixing effect; in addition, the rubber conical cylinder 44 is internally provided with a plug-in groove 442 corresponding in size to the plug-in conical rod 43; the above structure can make the rubber conical cylinder 44 have the characteristics of convenient disassembly and assembly, so that different sizes of rubber conical cylinders 44 can be replaced to adapt to the fixing of a wider range of film rolls.

[0033] Based on the above scheme, the film rolls of different lengths and diameters can be fixed, which has a wide range of applications, and the film rolls can be conveniently disassembled and assembled, thereby significantly improving the efficiency of the unwinding work.

[0034] In addition, the anti-loosening pressing piece 5 is arranged to be in frictional contact with the surface of the film roll during unwinding, so as to provide a certain damping force and ensure that the BOPP film roll will not continue to unwind due to inertia rotation when the unwinding is stopped; wherein the contact between the arc-shaped pressing plate 54 and the film roll can generate a certain damping to the film roll to prevent inertia sliding of the film roll, and the cooperation between the adjusting frame 51 and the sliding seat plate 52 can adjust the initial distance between the arc-shaped pressing plate 54 and the film roll, so that the film roll materials with different diameters can be adapted; in addition, the torsional spring 523 can increase the pressure applied by the arc-shaped pressing plate 54 to the film roll, so as to prevent the pressure provided by the weight of the arc-shaped pressing plate 54 from being too small to meet the minimum damping requirement.

[0035] Finally, it should be noted that: obviously, the above embodiments are only examples for clearly illustrating the utility model, and are not limited to the implementation. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made. Here, it is not necessary and impossible to enumerate all the implementation. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A BOPP unwinding device, characterized by, The utility model relates to a BOPP film unwinding device, including: Base (1), the upper end surface of which is provided with distance adjusting mounting frame (2); Movable frame (3) is slidably installed on distance adjusting mounting frame (2), and movable frame (3) can be driven to do reciprocating linear motion by distance adjusting mounting frame (2); Conical compression part (4) is installed on the top of movable frame (3) and is rotatably connected with movable frame (3), and the whole is conical, to be inserted into the paper tube both ends of BOPP film roll and be clamped and fixed; Anti-loosening compression part (5) is installed on movable frame (3), and when unwinding, anti-loosening compression part (5) is in frictional contact with the surface of film roll, so that BOPP film roll cannot rotate by inertia.

2. The BOPP unwinding device according to claim 1, characterized in that: The movable frame (3) includes a vertical plate (31) having a sliding table (32) fixedly connected to a bottom end thereof, and an installation shaft cylinder (34) fixedly provided at a top end of the vertical plate (31); wherein the sliding table (32) is connected with the vertical plate (31) by a plurality of symmetrical reinforcing rib plates (33).

3. The BOPP unwinding device according to claim 2, characterized in that: The distance adjusting mounting frame (2) includes two symmetrical end plates (21) having two guide rods (22) arranged therebetween, the sliding table (32) is slidably installed on the guide rods (22), and the guide rods (22) are provided with a rotatable double-threaded screw rod (23) therebetween, which is threadedly connected with the sliding table (32); wherein the double-threaded screw rod (23) is provided with equal-sized but opposite-directional threads on both sides thereof.

4. The BOPP unwinding device according to claim 2, characterized in that: The conical compression part (4) includes a rotating shaft (41) rotatably installed in the installation shaft cylinder (34), a limiting disc (42) fixedly connected to a front end of the rotating shaft (41), a plug-in conical rod (43) fixedly connected to a front end surface of the limiting disc (42), and a rubber conical cylinder (44) plugged on the plug-in conical rod (43).

5. The BOPP unwinding device according to claim 4, characterized in that: The rubber conical cylinder (44) has a plurality of anti-skid grooves (441) circumferentially arranged on a surface thereof, and a plug-in groove (442) corresponding in size to the plug-in conical rod (43) is formed in the rubber conical cylinder (44).

6. The BOPP unwinding device according to claim 1, characterized in that: The anti-loosening compression part (5) includes an adjusting frame (51) having a sliding seat plate (52) installed thereon, the adjusting frame (51) is used to drive the sliding seat plate (52) to move forward and backward to adjust a position; the sliding seat plate (52) is provided with a rotatably connected cantilever rod (53) installed at an end portion thereof, and an arc-shaped pressing plate (54) in contact with the BOPP film roll is fixedly installed at an end portion of the cantilever rod (53).

7. The BOPP unwinding device according to claim 6, characterized in that: The adjusting frame (51) includes a U-shaped plate (511) having a sliding block (512) slidably arranged thereon, and a rotatably connected adjusting screw rod (513) installed on the U-shaped plate (511) and threadedly connected with the sliding block (512); a guide groove (514) is formed in the U-shaped plate (511) to guide the sliding of the sliding seat plate (52).

8. The BOPP unwinding device according to claim 7, characterized in that: The sliding seat plate (52) includes an L-shaped plate (521) having an axle end fixed piece (522) fixedly provided at an end portion thereof, the end portion of the cantilever rod (53) is rotatably connected with the L-shaped plate (521) and the axle end fixed piece (522), and a torsion spring (523) is sleeved on the end portion of the cantilever rod (53), one end of the torsion spring (523) is fixedly connected with the cantilever rod (53), and the other end is fixedly connected with the axle end fixed piece (522); a guide rib (524) is fixedly provided at a lower end surface of the L-shaped plate (521) and is slidably connected with the guide groove (514).

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