High-precision tension adjusting frame for PVC (polyvinyl chloride) heat shrinkage film production

Abstract

The utility model relates to the technical field of heat shrink film production, and discloses a high-precision tension adjusting frame for PVC heat shrink film production, which comprises a support, four rotating rollers are rotatably connected in the support, first motors are fixedly connected to two sides of the bottom of the outer wall of the support, and second motors are fixedly connected to the two sides of the bottom of the outer wall of the support. The pressing rollers on the two sides are located over the rotating rollers on the two sides of the bottom of the support correspondingly, a second motor is fixedly connected to one side of the interior of the support, the output end of the second motor is fixedly connected with a two-way screw rod, three sliding plates distributed in an isosceles triangle shape are arranged on the top of the interior of the support, and top rollers are arranged on the outer sides of the three sliding plates correspondingly. And a thermal shrinkage film is arranged on the outer side of the rotating roller. According to the utility model, the second motor is driven to drive the two-way screw rod to rotate, so that the two top rollers can be far away from each other, and at the moment, the thermal shrinkage film can be jacked and stretched to be tensioned, so that the phenomenon that a rotating handle is manually shaken to be tensioned can be avoided, and the working intensity of workers can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat shrink film production, in particular to a high-precision tension adjustment frame for PVC heat shrink film production. Background Art

[0002] PVC heat shrink film is a heat shrink film made of polyvinyl chloride (PVC) material. It has heat shrink properties and can usually shrink and wrap the surface of an object after heating. Therefore, it is used in many fields such as food, beverages, daily necessities and cosmetics. The tension adjustment frame plays a vital role in the production of PVC heat shrink film. It can ensure that the tension of the heat shrink film remains stable and uniform during the production process, thereby improving the quality and appearance of the product.

[0003] During the use of the existing tension adjustment frame, it is necessary to manually rotate the crank to drive the positioning seat, the driving gear and the driven gear to rotate to achieve the tensioning of the heat shrink film, and the positioning seat is locked by the positioning pin. Therefore, when the tension is too large or too small and needs to be adjusted, the positioning pin needs to be pulled out before the tension can be adjusted. After the adjustment is completed, the positioning pin needs to be manually inserted into the positioning seat. Therefore, the operation is cumbersome and the labor intensity is high. Therefore, a high-precision tension adjustment frame for PVC heat shrink film production is proposed to solve the above problems. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a high-precision tension adjustment rack for PVC heat shrink film production, aiming to improve the existing tension adjustment rack that requires manual rotation of the crank to adjust the tension during use, and requires the positioning pin to be inserted and pulled back and forth to lock it, thus resulting in cumbersome operation and high labor intensity.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-precision tension adjustment frame for the production of PVC heat shrink film, comprising a bracket, wherein the bracket is rotatably connected to four rollers inside, and the four rollers are respectively installed at the four corners of the inner wall of the bracket, and the two sides of the bottom of the outer wall of the bracket are fixedly connected to a first motor, and the output ends of the two first motors are respectively fixedly connected to the two rollers on the two sides of the bottom of the bracket, and the two sides of the rear side of the outer wall of the bracket are fixedly connected to electric push rods, and the output ends of the electric push rods on both sides are fixedly connected to pressure blocks, and the pressure blocks are slidably connected to the bracket, and one side of the pressure blocks on both sides is rotatably connected to pressure rollers, and the pressure rollers on both sides are respectively located at two bottom ends of the bracket. Directly above the side rotating roller, a second motor is fixedly connected to one side of the inner part of the bracket, a bidirectional screw is fixedly connected to the output end of the second motor, support rods are threadedly connected to both sides of the outer wall of the bidirectional screw, three slides distributed in an isosceles triangle are arranged on the inner top of the bracket, the two bottom slides are rotatably connected to the slide at the top of the bracket through connecting rods, top rollers are arranged on the outer sides of the three slides, the two bottom slides are fixedly connected to the two support rods respectively, and the three slides are slidably connected to the bracket, a heat shrink film is arranged on the outer side of the rotating roller, and the two sides of the heat shrink film are between the pressure roller and the rotating roller, and heating components are arranged on both sides of the inner top of the bracket.

[0006] As a further description of the above technical solution:

[0007] The outer side of the top roller is rotatably connected with a support, one side of the support is fixedly connected with a clamping rod, and the clamping rod is slidably connected to the inside of the slide plate.

[0008] As a further description of the above technical solution:

[0009] One end of the bidirectional screw is rotatably connected to a mounting plate, and the top of the mounting plate is fixedly connected to the bottom surface of the inner wall of the bracket.

[0010] As a further description of the above technical solution:

[0011] Retaining rings are fixedly connected to both sides of the outer walls of the rotating roller and the pressure roller, a pressure sensor is arranged between the support and the slide plate, and the pressure sensor is fixedly connected to the slide plate.

[0012] As a further description of the above technical solution:

[0013] Three first sliding holes are opened in the middle of the bracket, and the three sliding plates are slidably connected inside the three first sliding holes respectively. Second sliding holes are opened on both sides of the bracket, and the pressure blocks on both sides are slidably connected inside the second sliding holes on both sides respectively.

[0014] As a further description of the above technical solution:

[0015] Both sides of the outer walls of the two slide plates at the bottom are fixedly connected with limiting plates, and the limiting plates at both sides are slidably connected to the two sides of the outer wall of the bracket.

[0016] As a further description of the above technical solution:

[0017] The heating assembly includes a transverse plate and a heating tube. There are multiple heating tubes and two transverse plates. The multiple heating tubes are evenly installed inside the two transverse plates. The two transverse plates are fixedly connected to both sides of the top of the bracket.

[0018] As a further description of the above technical solution:

[0019] A controller is fixedly connected to one side of the outer wall of the bracket, and the first motor, the second motor, the electric push rod, the pressure sensor and the heating tube are all electrically connected to the controller.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, the pressure roller can be pushed out by driving the electric push rod, and then the heat shrink film can be fixed by the pressure roller and the rotating roller. The two support rods can be moved away from each other by driving the second motor to drive the bidirectional screw to rotate. At this time, the top rollers on both sides of the bracket can be driven away from each other. At this time, the heat shrink film can be stretched out and then tensioned, so that manual shaking of the handle for tensioning can be avoided, thereby reducing the work intensity of the staff.

[0022] 2. In the utility model, the horizontal plate can be heated by driving the heating tube, and the heat can be radiated to the heat shrink film through the horizontal plate. Therefore, in the process of tensioning the heat shrink film, the shrinkage performance of the heat shrink film can be prevented from being affected by the excessively low temperature of the heat shrink film, and the support rods on both sides are brought close to each other by driving the second motor. At this time, the top roller at the top of the bracket can be brought close to the heat shrink film, so the heat shrink film can be lifted up and tensioned, and it can also be kept away from the heating tube to avoid excessive temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a high-precision tension adjustment frame for PVC heat shrink film production proposed by the utility model;

[0024] Figure 2 This is a structural breakdown diagram of the support portion of a high-precision tension adjustment frame for PVC heat shrink film production proposed by the utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of a high-precision tension adjustment frame for PVC heat shrink film production proposed by the utility model;

[0026] Figure 4This is a structural breakdown diagram of the connecting rod portion of a high-precision tension adjustment frame for PVC heat shrink film production proposed by the utility model.

[0027] Legend:

[0028] 1. Bracket; 2. Roller; 3. First motor; 4. Electric push rod; 5. Pressure block; 6. Pressure roller; 7. Second motor; 8. Bidirectional screw; 9. Support rod; 10. Slide plate; 11. Connecting rod; 12. Top roller; 13. Clamping rod; 14. Support; 15. Mounting plate; 16. Retaining ring; 17. First sliding hole; 18. Second sliding hole; 19. Limiting plate; 20. Horizontal plate; 21. Heating tube; 22. Pressure sensor; 23. Controller; 24. Shrink film. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the specification of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Reference Figure 1 , Figure 3 and Figure 4 The utility model provides an embodiment: a high-precision tension adjustment frame for the production of PVC heat shrink film, comprising a bracket 1, four rollers 2 are rotatably connected inside the bracket 1, and the four rollers 2 are respectively installed at the four corners of the inner wall of the bracket 1. The two sides of the bottom of the outer wall of the bracket 1 are fixedly connected with a first motor 3, and the output ends of the two first motors 3 are respectively fixedly connected to the two rollers 2 on both sides of the bottom of the bracket 1, and the two sides of the rear side of the outer wall of the bracket 1 are fixedly connected with electric push rods 4, and the output ends of the electric push rods 4 on both sides are fixedly connected with pressure blocks 5, and the pressure blocks 5 are slidably connected to the bracket 1. One side of the pressure blocks 5 on both sides is rotatably connected with pressure rollers 6, and the pressure rollers 6 on both sides are respectively located directly above the rollers 2 on both sides of the bottom of the bracket 1. A second motor 7 is fixedly connected to one side of the interior of the bracket 1, and a bidirectional screw 8 is fixedly connected to the output end of the second motor 7. Support rods 9 are threadedly connected to both sides of the outer wall of the bidirectional screw 8. Three slides 10 distributed in an isosceles triangle are provided at the inner top of the bracket 1. The two bottom slides 10 are rotatably connected to the slide 10 at the inner top of the bracket 1 through a connecting rod 11. Top rollers 12 are provided on the outer sides of the three slides 10. The two bottom slides 10 are fixedly connected to the two support rods 9 respectively, and the three slides 10 are slidably connected to the bracket 1. A heat shrink film 24 is provided on the outer side of the rotating roller 2, and both sides of the heat shrink film 24 are between the pressure roller 6 and the rotating roller 2. Heating components are provided on both sides of the inner top of the bracket 1.

[0031] When in use, first drive the electric push rod 4 to move the pressure roller 6 upward and away from the rotating roller 2, then install the heat shrink film 24 inside the device, and finally drive the electric push rod 4 to extend the output end to push out the pressure roller 6. At this time, the heat shrink film 24 can be pressed tightly, and then drive the second motor 7 to drive the bidirectional screw 8 to rotate, and make the two support rods 9 move away from each other. At this time, the top rollers 12 on both sides of the bracket 1 can be pushed out, and the top rollers 12 can be used to stretch the heat shrink film 24, so as to make it tensioned to avoid loosening, and then drive the first motor 3 to drive the rotating roller 2 to rotate, and then the heat shrink film 24 can be transported.

[0032] Reference Figure 1 , Figure 3 and Figure 4 The outer side of the top roller 12 is rotatably connected to a support 14, and a clamping rod 13 is fixedly connected to one side of the support 14, and the clamping rod 13 is slidably connected to the inside of the slide 10. One end of the bidirectional screw 8 is rotatably connected to a mounting plate 15, and the top of the mounting plate 15 is fixedly connected to the bottom surface of the inner wall of the bracket 1. Retaining rings 16 are fixedly connected to both sides of the outer walls of the rotating roller 2 and the pressure roller 6. A pressure sensor 22 is provided between the support 14 and the slide 10, and the pressure sensor 22 is fixedly connected to the slide 10. A controller 23 is fixedly connected to one side of the outer wall of the bracket 1, and the first motor 3, the second motor 7, the electric push rod 4, the pressure sensor 22 and the heating tube 21 are all electrically connected to the controller 23.

[0033] The top roller 12 can be installed through the support 14, and when the heat shrink film 24 is tensioned, the mutual squeezing force between the top roller 12 and the heat shrink film 24 will be transmitted to the pressure sensor 22. Therefore, the pressure value of the top roller 12 on the film can be detected by the pressure sensor 22 to avoid excessive or insufficient pressure, thereby achieving precise adjustment, and the bidirectional screw 8 can be installed and supported by the mounting plate 15. The retaining ring 16 can be used to limit the position of the film when the heat shrink film 24 is transported, thereby avoiding the phenomenon of displacement of the position of the heat shrink film 24.

[0034] Reference Figure 1 and Figure 2 The bracket 1 has three first sliding holes 17 in the middle, and the three slide plates 10 are slidably connected to the inside of the three first sliding holes 17. The bracket 1 has second sliding holes 18 on both sides, and the two side pressure blocks 5 are slidably connected to the inside of the two side second sliding holes 18. The two sides of the outer wall of the two slide plates 10 at the bottom are fixedly connected to the limiting plates 19, and the limiting plates 19 on both sides are slidably connected to the two sides of the outer wall of the bracket 1.

[0035] The movement direction of the slide plate 10 can be guided by the first slide hole 17, and the movement direction of the pressing block 5 can be guided by the second slide hole 18. A mounting plate 15 is provided on the outer side of the slide plate 10. The mounting plate 15 can be used to limit the position of the slide plate 10, thereby improving the movement stability of the top roller 12, thereby ensuring that the top roller 12 is not subjected to uneven force when extending the heat shrink film 24.

[0036] Reference Figure 1 , Figure 3 and Figure 4 The heating assembly includes a transverse plate 20 and a heating tube 21. There are multiple heating tubes 21 and two transverse plates 20. The multiple heating tubes 21 are evenly installed inside the two transverse plates 20. The two transverse plates 20 are fixedly connected to both sides of the top of the bracket 1 respectively.

[0037] By driving the heating tube 21, the cross plate 20 can be heated, and finally the heat is transferred to the heat shrink film 24. At this time, the heat shrink film 24 can be heated to prevent the shrinkage performance of the heat shrink film 24 from being affected by too low a temperature. At the same time, the second motor 7 is driven to drive the bidirectional screw 8 to bring the two support rods 9 closer to each other. At this time, the supports 14 on both sides of the bracket 1 can be driven closer to each other, so that the support 14 at the top of the bracket 1 can be pushed out, and then the top of the bracket 1 is close to the heat shrink film 24 at the top of the bracket 1. Therefore, the heat shrink film 24 at the top of the bracket 1 can be lifted up and kept away from the cross plate 20, so that the heat shrink film 24 and the heating tube 21 are not too close, resulting in a high heating temperature.

[0038] Working principle: When in use, first drive the telescopic rod to retract the pressure roller 6 and move it away from the rotating roller 2, then pull the heat shrink film 24 to pass through between the pressure roller 6 and the rotating roller 2 on both sides of the bottom of the bracket 1, and press the heat shrink film 24 on the top surface of the rotating roller 2 on both sides of the top of the bracket 1, then drive the electric push rod 4 to extend the output end to push the pressure roller 6 out, at this time, it can be pressed against the rotating roller 2 on both sides of the bottom of the bracket 1, so that the heat shrink film 24 can be fixed, and then the arrangement of the heat shrink film 24 is completed, and then the first motor 3 is driven to drive the rotating roller 2 to rotate, At this time, the heat shrink film 24 can be transported. When the heat shrink film 24 needs to be tensioned, the second motor 7 is driven to drive the bidirectional screw 8 to rotate, and the bidirectional screw 8 is used to drive the two top rollers 12 to move away from each other. At this time, the top rollers 12 on both sides of the bracket 1 can be used to stretch the heat shrink film 24. Since the two sides of the heat shrink film 24 are clamped by the rotating roller 2 and the pressing roller 6, the heat shrink film 24 can be tensioned to prevent the heat shrink film 24 from being loosened. In addition, when the heat shrink film 24 needs to be heated, the second motor 7 is driven to reverse the rotation of the two sides of the bracket 1. The top rollers 12 on the sides are close to each other, and the top roller 12 on the top of the bracket 1 can be pushed out. At this time, the top roller 12 pushed out by the bracket 1 can be used to stretch the heat shrink film 24 to make it tight, and by driving the heating tube 21, the heating tube 21 can be used to heat the cross plate 20. At this time, the cross plate 20 can transfer heat to the heat shrink film 24 on the top of the bracket 1. At this time, it can be heated to avoid the temperature being too low to affect the shrinkage performance of the heat shrink film 24, and when the heat shrink film 24 is stretched, the top roller 12 and the heat shrink film 24 squeeze each other. The pressure force will cause the support 14 to drive the clamping rod 13 to slide inside the skateboard 10. Since the pressure sensor 22 is installed between the skateboard 10 and the support 14, the pressure value of the top roller 12 on the film can be detected by the pressure sensor 22. When the pressure value is large, the controller 23 drives the second motor 7 to drive the top roller 12 away from the heat shrink film 24. When the pressure is small, the second motor 7 is driven to make the top roller 12 close to the heat shrink film 24, thereby achieving precise control of the pressure to avoid excessive or insufficient pressure that affects the final quality of the heat shrink film 24.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision tension adjustment frame for PVC heat shrink film production, comprising a support (1), characterized in that: The support (1) is internally rotatably connected to four rollers (2), which are respectively mounted at the four corners of the inner wall of the support (1). Both sides of the bottom of the outer wall of the support (1) are fixedly connected to a first motor (3), and the output ends of the two first motors (3) are respectively fixedly connected to the two rollers (2) on both sides of the bottom of the support (1). Both sides of the rear side of the outer wall of the support (1) are fixedly connected to electric push rods (4), and the output ends of the electric push rods (4) on both sides are fixedly connected to pressure blocks (5), which are slidably connected to the support (1). One side of the pressure blocks (5) on both sides is rotatably connected to pressure rollers (6), and the pressure rollers (6) on both sides are respectively located directly above the rollers (2) on both sides of the bottom of the support (1). One side of the interior of the support (1) is fixedly connected to a second motor (7), and the first The output ends of the two motors (7) are fixedly connected with bidirectional screws (8), and both sides of the outer walls of the bidirectional screws (8) are threadedly connected with support rods (9). The inner top of the bracket (1) is provided with three slides (10) distributed in an isosceles triangle. The two bottom slides (10) are rotatably connected to the slide (10) at the inner top of the bracket (1) through a connecting rod (11). Top rollers (12) are provided on the outer sides of the three slides (10). The two bottom slides (10) are fixedly connected to the two support rods (9) respectively, and the three slides (10) are slidably connected to the bracket (1). A heat shrink film (24) is provided on the outer side of the rotating roller (2), and both sides of the heat shrink film (24) are between the pressure roller (6) and the rotating roller (2). Heating components are provided on both sides of the inner top of the bracket (1).

2. The high-precision tension adjustment frame for PVC heat shrink film production according to claim 1, characterized in that: The outer side of the top roller (12) is rotatably connected to a support (14), one side of the support (14) is fixedly connected to a clamping rod (13), and the clamping rod (13) is slidably connected to the inside of the slide plate (10).

3. The high-precision tension adjustment frame for PVC heat shrink film production according to claim 1, characterized in that: One end of the bidirectional screw (8) is rotatably connected to a mounting plate (15), and the top of the mounting plate (15) is fixedly connected to the bottom surface of the inner wall of the bracket (1).

4. The high-precision tension adjustment frame for PVC heat shrink film production according to claim 2, characterized in that: Retaining rings (16) are fixedly connected to both sides of the outer walls of the rotating roller (2) and the pressure roller (6), a pressure sensor (22) is provided between the support (14) and the slide plate (10), and the pressure sensor (22) is fixedly connected to the slide plate (10).

5. The high-precision tension adjustment frame for PVC heat shrink film production according to claim 1, characterized in that: Three first sliding holes (17) are provided in the middle of the bracket (1), and the three slide plates (10) are respectively slidably connected inside the three first sliding holes (17). Second sliding holes (18) are provided on both sides of the inside of the bracket (1), and the pressure blocks (5) on both sides are respectively slidably connected inside the second sliding holes (18) on both sides.

6. The high-precision tension adjustment frame for producing PVC heat shrinkable film according to claim 5, characterized in that: Both sides of the outer walls of the two slide plates (10) at the bottom are fixedly connected to limiting plates (19), and the limiting plates (19) at both sides are slidably connected to both sides of the outer wall of the bracket (1).

7. The high-precision tension adjustment frame for producing PVC heat shrinkable film according to claim 4, characterized in that: The heating assembly comprises a transverse plate (20) and a heating tube (21), a plurality of the heating tubes (21) are provided, and two transverse plates (20) are provided. The plurality of heating tubes (21) are evenly installed inside the two transverse plates (20), and the two transverse plates (20) are respectively fixedly connected to the two sides of the top of the bracket (1).

8. The high-precision tension adjustment frame for producing PVC heat shrinkable film according to claim 7, characterized in that: A controller (23) is fixedly connected to one side of the outer wall of the bracket (1); the first motor (3), the second motor (7), the electric push rod (4), the pressure sensor (22) and the heating tube (21) are all electrically connected to the controller (23).

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