A take-up tension balancing device for a PVC film calender

Abstract

The utility model provides a kind of winding tension balancing device of PVC film calender, belong to PVC film calender technical field, to solve the influence of artificial positioning error, narrow width film material is often difficult to accurate restriction in the center area of guide roller to complete winding, subsequent by winding speed fluctuation, equipment slight vibration etc., film material coil is prone to skew, interlayer misregistration etc. Defect problem, including support frame, drive electric jar, guide roller, tension control component and centering positioning component;The drive electric jar rear end hinged connection is below fixed column;Two the guide rollers are respectively rotatably connected in support frame top;The tension control component is set in support frame left side;Two groups the centering positioning component are respectively set in two guide rollers inside.The utility model realizes the initiative accurate regulation of PVC film winding tension, simultaneously with the aid of two groups of centering positioning component accurate regulation positioning plate spacing, guarantee the structure regularity of coil finished product.

Description

Technical Field

[0001] This utility model belongs to the technical field of PVC film calendering machines, and more specifically, it relates to a winding tension balancing device for a PVC film calendering machine. Background Technology

[0002] The winding tension balancing device of a PVC film calender is a key auxiliary device installed in the winding unit of a PVC film calendering production line. It can adjust the tension of the PVC film in real time during the winding process, ensuring that the film material maintains a stable and uniform tension state at all times during the winding stage. This avoids problems such as wrinkling, stretching deformation, uneven thickness, or loose winding caused by tension fluctuations, ultimately ensuring the dimensional accuracy, surface quality, and adaptability of the finished PVC film. The existing winding tension balancing device of a PVC film calender generally consists of a support frame, guide rollers, winding rollers, and tension rollers.

[0003] Existing application number: CN202420965591.5, this utility model relates to the field of winding tension balancing technology, and discloses a winding tension balancing device for a PVC film calender. It includes two mounting bases, each with a T-shaped plate fixedly connected to its top. Each T-shaped plate is fitted with a sleeve plate, and a pressure roller passes through each sleeve plate. A winding roller is located on one side of the pressure roller, with a drive mechanism on one side and a deceleration mechanism on the other. An L-shaped plate is fixedly connected to one side of one sleeve plate, with a lead screw passing through the end of the L-shaped plate away from the sleeve plate. A sliding plate adapted to the lead screw is mounted on the lead screw. A square plate is fixedly connected to the top of the sliding plate, and a round rod is fixedly connected to the top of the square plate. A top plate is fixedly connected to the top of the round rod. This utility model can balance the winding tension, preventing excessive pressure on the PVC film and thus avoiding damage, ensuring product quality, ensuring normal production and processing, and ensuring production efficiency.

[0004] Based on the above, when the winding tension balancing device of the PVC film calender is processing some narrow-width PVC film materials, the film material is often difficult to accurately restrict to the center area of ​​the guide roller during the initial winding of the film material to the guide roller due to the influence of manual positioning errors. Once this initial winding offset occurs, subsequent fluctuations in winding speed and tension instability caused by slight vibrations of the equipment will cause the film material to gradually deviate from the preset material path during the process of passing around the tension roller to the guide roller. Ultimately, the roll material cannot be accurately aligned with the middle area of ​​the winding roller, resulting in defects such as winding skew and interlayer misalignment. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a winding tension balancing device for a PVC film calender. This solves the problem that existing PVC film calender winding tension balancing devices, when handling narrow-width PVC film, often fail to precisely confine the film to the center area of ​​the guide roller during the initial winding process due to human positioning errors. Once this initial winding offset occurs, subsequent fluctuations in winding speed and slight vibrations of the equipment cause tension instability, leading to the film gradually deviating from the preset feeding path during its transmission from the tension roller to the guide roller. Ultimately, this results in the roll failing to accurately align with the center area of ​​the winding roller, causing defects such as winding skew and interlayer misalignment.

[0006] The purpose and effect of this utility model, a winding tension balancing device for a PVC film calendering machine, are achieved by the following specific technical means: A winding tension balancing device for a PVC film calender includes a support frame, a fixed column, a winding roller, a drive cylinder, a guide roller, a tension control component, and a centering and positioning component. The fixed column is fixedly connected to the top of the support frame. The winding roller is rotatably connected to the upper right end of the support frame. The rear end of the drive cylinder is hinged to the lower part of the fixed column. Two guide rollers are provided, and the two guide rollers are rotatably connected to the top of the support frame respectively. The tension control component is located on the left side of the support frame. Two sets of centering and positioning components are provided, and the two sets of centering and positioning components are respectively located inside the two guide rollers.

[0007] Furthermore, the tension control assembly includes: a swing connecting arm and a tension roller; two swing connecting arms are provided, with the right ends of the two swing connecting arms rotatably connected to the front and rear sides of the support frame respectively; the tension roller is rotatably connected to the inner side of the left end of the two swing connecting arms.

[0008] Furthermore, the tension control assembly also includes: a connecting column and a connecting block; the connecting column is fixedly connected to the inner side of the right end of the two swing connecting arms; the left end of the connecting block is fixedly connected to the outer side of the connecting column, and the right end of the connecting block is hinged to the piston rod end of the drive cylinder.

[0009] Furthermore, the centering and positioning component includes: a rotating column and an operating hole; two rotating columns are provided, and the two rotating columns are rotatably connected inside the guide roller; two operating holes are provided, and the two operating holes are respectively provided at the outer ends of the two rotating columns.

[0010] Furthermore, the centering and positioning assembly also includes: a drive worm, a first transmission shaft, and a drive worm wheel; the left and right ends of the drive worm are coaxially and fixedly connected to the inner ends of two rotating columns respectively; the first transmission shaft is rotatably connected inside the guide roller; the drive worm wheel is coaxially and fixedly connected to the top of the first transmission shaft, and the drive worm wheel meshes with the drive worm.

[0011] Furthermore, the centering and positioning component also includes a drive gear and a drive rack; the drive gear is coaxially and fixedly connected to the bottom of the first transmission shaft; two drive racks are provided, and the outer ends of the two drive racks are slidably connected inside the guide roller, and the two drive racks mesh with the left and right sides of the drive gear respectively.

[0012] Furthermore, the centering and positioning component also includes: a positioning plate and a positioning mark; two positioning plates are provided, and the two positioning plates are respectively fixedly connected to the outer ends of two drive racks; multiple positioning marks are provided, and the multiple positioning marks are respectively fixedly connected to the outer side of the guide roller.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Firstly, by setting up a tension control component and pairing it with a strain gauge tension sensor, the active and precise adjustment of the PVC film winding tension is achieved. When the film tension fluctuates, the piston rod of the drive cylinder can quickly extend and retract, causing the swing connecting arm to swing, adjusting the pressure of the tension roller on the film in real time. This effectively counteracts the problem of excessive or insufficient tension, avoiding defects such as wrinkling, stretching deformation, and loose winding of the film, ensuring the tension stability of the film during the winding stage, and thus improving the dimensional accuracy, surface quality, and adaptability of the finished product for subsequent processing.

[0014] Secondly, two sets of centering and positioning components are set up, which can precisely adjust the distance between the two positioning plates according to the actual width of the film material. Combined with the positioning marks on the guide roller, visual positioning is achieved, which effectively constrains the position of the film material around the guide roller. This design avoids the initial manual positioning error and the lateral offset caused by equipment vibration and speed fluctuation during the winding process, ensuring that the roll material is always accurately wound in the middle area of ​​the winding roller.

[0015] This invention achieves active and precise adjustment of PVC film winding tension through a tension control component combined with a strain gauge tension sensor. At the same time, it uses two sets of centering and positioning components to precisely adjust the spacing between positioning plates and achieves visual positioning by combining positioning marks, ensuring the structural regularity of the finished roll material and promoting the standardization and efficiency of PVC film winding production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the drive electric cylinder structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the swing connecting arm structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the guide roller structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the positioning plate structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the first transmission shaft structure of this utility model.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Support frame; 101. Fixed column; 2. Take-up roller; 3. Drive cylinder; 4. Connecting block; 5. Swing connecting arm; 501. Connecting column; 6. Tension roller; 7. Guide roller; 701. Positioning mark; 8. Rotating column; 801. Operating hole; 802. Drive worm gear; 9. First transmission shaft; 901. Drive worm wheel; 902. Drive gear; 10. Drive rack; 1001. Positioning plate. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0024] Example 1: As attached Figure 1 To be continued Figure 6 As shown: This utility model provides a winding tension balancing device for a PVC film calender, including a support frame 1, a fixed column 101, a winding roller 2, a drive cylinder 3, a guide roller 7, and a tension control assembly; the fixed column 101 is fixedly connected to the top of the support frame 1; the winding roller 2 is rotatably connected to the upper right end of the support frame 1; the rear end of the drive cylinder 3 is hinged to the bottom of the fixed column 101; two guide rollers 7 are provided, and the two guide rollers 7 are rotatably connected to the top of the support frame 1 respectively; the tension control assembly is located on the left side of the support frame 1.

[0025] The tension control assembly includes: a swing connecting arm 5 and a tension roller 6; two swing connecting arms 5 are provided, and the right ends of the two swing connecting arms 5 are respectively rotatably connected to the front and rear sides of the support frame 1; the tension roller 6 is rotatably connected to the inner side of the left end of the two swing connecting arms 5.

[0026] The tension control assembly also includes a connecting column 501 and a connecting block 4. The connecting column 501 is fixedly connected to the inner side of the right end of the two swing connecting arms 5. The left end of the connecting block 4 is fixedly connected to the outer side of the connecting column 501, and the right end of the connecting block 4 is hinged to the piston rod end of the drive cylinder 3.

[0027] The specific usage and function of this embodiment: The height of tension roller 6 is lower than that of guide roller 7. In use, the end of the PVC film first passes the bottom of tension roller 6, then the end of the film first wraps around to the top of guide roller 7 on the left, then wraps upwards to the bottom of guide roller 7 on the right, and finally is wound up on the outside of take-up roller 2; strain gauge tension sensors are installed at both ends of the support shaft of tension roller 6 to collect the tension signal of the film in real time. The sensors are electrically connected to the PLC control system of the calender. The PLC controls the piston rod of the drive cylinder (3) to extend and retract according to the tension signal. The required stable tension of the PVC film is pre-input into the LC. The PLC reads the actual tension signal from the tension sensor in real time. When the actual tension is greater than the target tension, the PLC controls the piston rod of the drive cylinder 3 to extend, pulling the right end of the connecting block 4 downward. This causes the connecting column 501 and the swing connecting arm 5 to swing upward around the hinge point between the swing connecting arm 5 and the support frame 1, thereby relaxing the pressure on the film material until the actual tension returns to the target value. Conversely, when the actual tension is less than the target tension, the PLC controls the piston rod of the drive cylinder 3 to retract, thereby tensioning the film material until the tension reaches the target value.

[0028] Example 2: Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 6 As shown, it also includes a centering and positioning component, with two sets of centering and positioning components, which are respectively installed inside the two guide rollers 7.

[0029] The centering and positioning component includes: a rotating column 8 and an operating hole 801; two rotating columns 8 are provided, and the two rotating columns 8 are rotatably connected inside the guide roller 7; two operating holes 801 are provided, and the two operating holes 801 are respectively provided at the outer ends of the two rotating columns 8.

[0030] The centering and positioning assembly also includes: a drive worm 802, a first transmission shaft 9, and a drive worm wheel 901; the left and right ends of the drive worm 802 are coaxially fixedly connected to the inner ends of the two rotating columns 8 respectively; the first transmission shaft 9 is rotatably connected to the inside of the guide roller 7; the drive worm wheel 901 is coaxially fixedly connected to the top of the first transmission shaft 9, and the drive worm wheel 901 meshes with the drive worm 802.

[0031] The centering and positioning component also includes a drive gear 902 and a drive rack 10. The drive gear 902 is coaxially fixedly connected to the bottom of the first transmission shaft 9. Two drive racks 10 are provided, and the outer ends of the two drive racks 10 are slidably connected to the inside of the guide roller 7. The two drive racks 10 mesh with the left and right sides of the drive gear 902 respectively.

[0032] The centering and positioning component also includes: a positioning plate 1001 and a positioning mark 701; two positioning plates 1001 are provided, and the two positioning plates 1001 are respectively fixedly connected to the outer ends of two drive racks 10; multiple positioning marks 701 are provided, and the multiple positioning marks 701 are respectively fixedly connected to the outer side of the guide roller 7.

[0033] The specific usage and function of this embodiment: Initially, the film material is wound around the top of the left guide roller 7, then upwards to the bottom of the right guide roller 7, and finally rolled up outside the take-up roller 2. If the width of the film material is significantly lower than the front-to-back length of the guide roller 7, to prevent offset after winding, a screwdriver can be inserted into the operating hole 801 and rotated. This rotates the rotating column 8, causing the drive worm gear 802 to rotate synchronously. The worm gear transmission mechanism, formed by the meshing of the drive worm gear 802 and the drive worm wheel 901, drives the first transmission shaft 9 to rotate. 9. The gear and rack transmission mechanism formed by the two drive racks 10 meshing with the left and right sides of the drive gear 902 can drive the two positioning plates 1001 to move inward synchronously. The multiple positioning marks 701 are centimeter marks, and the innermost positioning mark 701 has a mark of zero. Then, the position of the two positioning plates 1001 after moving is determined according to the actual width of the film material. This can limit the position of the film material around the two guide rollers 7. After the film material is wound between the two positioning plates 1001, it can be ensured that the subsequent roll material can be correctly wound in the middle position of the take-up roller 2.

[0034] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0035] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0036] The above are merely specific implementations of this embodiment, but the protection scope of this embodiment is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this embodiment should be included within the protection scope of this embodiment. Therefore, the protection scope of this embodiment should be determined by the protection scope of the claims.

Claims

1. A winding tension balancing device for a PVC film calender, comprising a support frame (1), a fixed column (101), a winding roller (2), a drive cylinder (3), a guide roller (7), a tension control assembly, and a centering and positioning assembly; characterized in that: The fixed column (101) is fixedly connected to the top of the support frame (1); the take-up roller (2) is rotatably connected to the upper right end of the support frame (1); the rear end of the drive cylinder (3) is hinged to the bottom of the fixed column (101); two guide rollers (7) are provided, and the two guide rollers (7) are rotatably connected to the top of the support frame (1); the tension control component is provided on the left side of the support frame (1); two sets of centering and positioning components are provided, and the two sets of centering and positioning components are respectively provided inside the two guide rollers (7).

2. The winding tension balancing device for a PVC film calender as described in claim 1, characterized in that: The tension control assembly includes: a swing connecting arm (5) and a tension roller (6); two swing connecting arms (5) are provided, and the right ends of the two swing connecting arms (5) are respectively rotatably connected to the front and rear sides of the support frame (1); the tension roller (6) is rotatably connected to the inner side of the left end of the two swing connecting arms (5).

3. The winding tension balancing device for a PVC film calender as described in claim 2, characterized in that: The tension control assembly also includes a connecting column (501) and a connecting block (4); the connecting column (501) is fixedly connected to the inner side of the right end of the two swing connecting arms (5); the left end of the connecting block (4) is fixedly connected to the outer side of the connecting column (501), and the right end of the connecting block (4) is hinged to the piston rod end of the drive cylinder (3).

4. The winding tension balancing device for a PVC film calender as described in claim 1, characterized in that: The centering and positioning component includes: a rotating column (8) and an operating hole (801); two rotating columns (8) are provided, and the two rotating columns (8) are rotatably connected inside the guide roller (7); two operating holes (801) are provided, and the two operating holes (801) are respectively provided at the outer ends of the two rotating columns (8).

5. The winding tension balancing device for a PVC film calender as described in claim 4, characterized in that: The centering and positioning assembly further includes: a drive worm (802), a first transmission shaft (9), and a drive worm wheel (901); the left and right ends of the drive worm (802) are coaxially fixedly connected to the inner ends of two rotating columns (8); the first transmission shaft (9) is rotatably connected to the inside of the guide roller (7); the drive worm wheel (901) is coaxially fixedly connected to the top of the first transmission shaft (9), and the drive worm wheel (901) meshes with the drive worm (802).

6. The winding tension balancing device for a PVC film calender as described in claim 5, characterized in that: The centering and positioning assembly also includes a drive gear (902) and a drive rack (10); the drive gear (902) is coaxially fixedly connected to the bottom of the first transmission shaft (9); two drive racks (10) are provided, and the outer ends of the two drive racks (10) are slidably connected to the inside of the guide roller (7), and the two drive racks (10) mesh with the left and right sides of the drive gear (902) respectively.

7. The winding tension balancing device for a PVC film calender as described in claim 6, characterized in that: The centering and positioning component further includes: a positioning plate (1001) and a positioning mark (701); two positioning plates (1001) are provided, and the two positioning plates (1001) are respectively fixedly connected to the outer ends of two drive racks (10); multiple positioning marks (701) are provided, and the multiple positioning marks (701) are respectively fixedly connected to the outer side of the guide roller (7).

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