An on-line plastic film winding mechanism
By using a counterweight and inclined roller support design in the plastic film winding mechanism, the problem of unstable roller clamping force was solved, achieving stable clamping of the roll at different thicknesses, thus improving winding quality and film performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANTOU F T Z OCTOPLAS TECH LTD
- Filing Date
- 2025-10-13
- Publication Date
- 2026-06-23
AI Technical Summary
In existing plastic film winding mechanisms, the elastic clamping force of the pressure rollers is unstable as the thickness of the roll changes, resulting in the roll becoming loose or excessively compressed, which affects the winding quality and film performance.
The pressure roller support design, which adopts a counterweight and inclined surface structure, uses the gravity of the counterweight to provide a constant clamping force, and the inclined surface component maintains the stable clamping of the pressure roller on the material roll. Combined with the lifting top component to adjust the pressure, it ensures the winding quality.
It achieves stable compression of the roll at different thicknesses, avoiding loose rolls or excessive compression, and improving winding quality and film performance.
Smart Images
Figure CN224394182U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic film winding technology, and in particular to an online plastic film winding mechanism. Background Technology
[0002] In the plastic film processing industry, the winding process is a crucial step after film production, directly affecting the storage, transportation, and subsequent processing of the finished film. The winding mechanism is typically located at the end of the plastic film production line, and its core function is to wind the continuously conveyed film into a regular roll for easy subsequent processing.
[0003] To ensure good tightness and flatness during the winding process and avoid problems such as interlayer gaps and wrinkles caused by loose winding, existing winding mechanisms generally include pressure roller assemblies. A typical structure of this type of pressure roller assembly involves mounting the pressure roller movably beside the winding roller using a bracket, while utilizing a spring as an elastic clamping component to keep the pressure roller in constant contact with the surface of the roll during winding. This spring-type pressure roller mechanism, due to its simple structure, low manufacturing cost, and ability to achieve real-time contact between the pressure roller and the roll, has been widely used in small- to medium-scale film production equipment.
[0004] However, in actual production, as the roll continues to wind, its radial thickness increases, gradually lifting the pressure roller and causing the spring connecting it to be continuously stretched, resulting in changes in its stretch length. Since the spring force is linearly related to the stretch (following Hooke's Law), the change in stretch length directly leads to a continuous change in the clamping force applied by the spring to the pressure roller: in the initial winding stage, the roll thickness is small, the spring stretch is small, and the clamping force is insufficient, easily causing loose winding of the inner layers and interlayer misalignment; as the roll thickness increases, the spring stretch increases, and the clamping force gradually increases. When the roll thickness reaches a certain level, excessive clamping force may cause excessive compression of the film, resulting in film deformation, surface damage, and even problems such as wrinkling at the roll edges and excessively tight inward winding, seriously affecting the winding quality and subsequent performance of the roll. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing an online plastic film winding mechanism.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] The present invention provides an online plastic film winding mechanism, which includes a winding assembly, the winding assembly including a base and a winding roller rotatably connected to the base;
[0008] An inclined surface is provided on the base; the height of the inclined surface gradually decreases as it approaches the take-up roller.
[0009] The inclined surface is slidably connected to a pressure roller bracket; a pressure roller is rotatably connected to the pressure roller bracket; and a counterweight is connected to the pressure roller bracket.
[0010] Furthermore, the counterweight is a hollow barrel; the top of the hollow barrel is provided with a water inlet; and the bottom of the hollow barrel is provided with a drain outlet.
[0011] Furthermore, a connecting plate is fixed on the pressure roller bracket; a straight groove is provided on the top surface of the connecting plate; a sliding rod is fixed on the counterweight; the sliding rod passes through the straight groove from bottom to top; the sliding rod is slidably connected to the straight groove; a fixing rod is fixed on the base; a guide sleeve is fixed on the fixing rod; the guide sleeve is slidably connected to the sliding rod; a lifting assembly is fixed on the base; the lifting assembly is located at the bottom of the counterweight.
[0012] Furthermore, rollers are distributed on both the upper and lower sides of the connecting plate; the rollers are rotatably connected to the sliding rod; and the roller bodies are pressed against the surface of the connecting plate.
[0013] Furthermore, a guide rail is fixed on the inclined surface; a slider that is slidably connected to the guide rail is fixed on the pressure roller bracket.
[0014] Furthermore, the axis of the pressure roller and the axis of the take-up roller are arranged parallel to each other; the plane in which the axis of the pressure roller and the axis of the take-up roller are located is a first plane; the first plane is arranged parallel to the length direction of the guide rail.
[0015] With the above structure, the beneficial effects of this utility model are as follows: under the gravity of the counterweight, the pressure roller bracket can generate pressure along the inclined surface of the take-up roller, so that the pressure roller presses against the film on the take-up roller; the pressure of the pressure roller on the plastic film roll is the component force of the counterweight along the inclined surface. During the pressing process, this component force will not change with the film thickness. The constant pressure can ensure the quality of film winding. Attached Figure Description
[0016] Figure 1 This is a first-view perspective perspective view of this utility model;
[0017] Figure 2 This is a second-view perspective perspective view of this utility model;
[0018] Figure 3 This is a structural diagram showing the connection between the pressure roller and its counterweight module;
[0019] Explanation of reference numerals in the attached figures:
[0020] 1. Base; 101. Inclined surface; 102. Fixing rod; 2. Guide rail; 3. Pressure roller bracket;
[0021] 4. Sliding rod; 5. Connecting plate; 501. Straight groove; 6. Pressure roller; 7. Take-up roller; 8. Counterweight;
[0022] 801. Water inlet; 9. Lifting assembly; 10. Slider; 11. Roller; 12. Guide sleeve. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings.
[0024] like Figures 1 to 3 As shown, the online winding mechanism for plastic film of this utility model includes a winding assembly, which includes a base 1 and a winding roller 7 rotatably connected to the base 1.
[0025] The base 1 is equipped with a rotating module for driving the take-up roller 7 to rotate; the rotating module includes a motor and a gearbox; the take-up roller 7 is detachably connected to the base 1, and the motor drives the take-up roller 7 to rotate through the gearbox and friction wheel to realize the winding of the plastic film. It is not fundamentally different from the existing winding mechanism, so it will not be described in detail.
[0026] An inclined surface 101 is provided on the base 1; the height of the inclined surface 101 gradually decreases as it approaches the take-up roller 7.
[0027] The inclined surface 101 is slidably connected to a pressure roller bracket 3; a pressure roller 6 is rotatably connected to the pressure roller bracket 3; and a counterweight 8 is connected to the pressure roller bracket 3.
[0028] Under the weight of the counterweight 8, the pressure roller bracket 3 can generate pressure along the inclined surface 101 towards the winding roller 7, so that the pressure roller 6 presses against the film on the winding roller 7; the pressure of the pressure roller 6 on the plastic film roll is the component force of the counterweight 8 along the inclined surface 101. During the pressing process, this component force will not change with the film thickness. The constant pressure can ensure the quality of film winding.
[0029] In a preferred embodiment of this utility model, the counterweight 8 is a hollow barrel; the top of the hollow barrel is provided with a water inlet 801; and the bottom of the hollow barrel is provided with a drain outlet.
[0030] The counterweight of the hollow barrel has a simple structure and low cost. Water is injected into the interior through the water inlet 801 and drained through the drain outlet at the bottom. A shut-off valve is connected to the drain outlet. By cooperating with the water inlet 801, the amount of liquid inside the hollow barrel can be controlled, thereby adjusting the overall weight of the counterweight 8 and adjusting the pressure of the pressure roller 6 pressing on the film of the take-up roller 7.
[0031] In a preferred embodiment of this utility model, a connecting plate 5 is fixed on the pressure roller bracket 3; a straight groove 501 is provided on the top surface of the connecting plate 5; a sliding rod 4 is fixed on the counterweight block 8; the sliding rod 4 passes through the straight groove 501 from bottom to top; the sliding rod 4 is slidably connected to the straight groove 501; a fixing rod 102 is fixed on the base 1; a guide sleeve 12 is fixed on the fixing rod 102; the guide sleeve 12 is slidably connected to the sliding rod 4; a lifting assembly 9 is fixed on the base 1; the lifting assembly 9 is located at the bottom of the counterweight block 8.
[0032] The lifting assembly 9 is a cylinder structure that can push the counterweight 8 upward;
[0033] The sliding rod 4 can move laterally relative to the connecting plate 5; as the thickness of the plastic film roll increases, the pressure roller bracket 3, the connecting plate 5 and the pressure roller 6 will be gradually pushed upward along the inclined surface 101, so the height of the sliding rod 4 and the counterweight 8 will also be increased; the sliding rod 4 will slide up and down on the guide sleeve 12.
[0034] The sliding rod 4 and guide sleeve 12 ensure that the counterweight 8 is always above the lifting assembly 9. When the plastic film roll is removed, the lifting assembly 9 pushes the counterweight 8 up to a certain height, so that the pressure roller bracket 3 and the pressure roller 6 slide along the inclined surface 101, and the plastic film roll separates from the pressure roller 6, so that the pressure roller 6 will not interfere with the removal of the plastic film roll. After the plastic film roll is removed, the take-up roller 7 is reinstalled, and after one turn of film is wound on the take-up roller 7, the lifting assembly 9 descends, the pressure roller 6 descends, and presses the film on the pressure roller 6 again to re-wrap the next roll of plastic film.
[0035] In a preferred embodiment of this utility model, rollers 11 are distributed on both the upper and lower sides of the connecting plate 5; the rollers 11 are rotatably connected to the sliding rod 4; the wheel body of the rollers 11 is pressed against the surface of the connecting plate 5.
[0036] The sliding rod 4 is slidably connected to the connecting plate 5 by the rollers 11 on the upper and lower sides respectively; when the sliding rod 4 slides relative to the connecting plate 5, the rollers 11 roll on the connecting plate 5.
[0037] In a preferred embodiment of this utility model, a guide rail 2 is fixed on the inclined surface 101; and a slider 10 that is slidably connected to the guide rail 2 is fixed on the pressure roller bracket 3.
[0038] The pressure roller bracket 3 is slidably connected on the inclined surface 101 via the guide rail 2 and the slider 10.
[0039] In a preferred embodiment of this utility model, the axis of the pressure roller 6 and the axis of the take-up roller 7 are arranged parallel to each other; the plane in which the axis of the pressure roller 6 and the axis of the take-up roller 7 lie is a first plane; the first plane is arranged parallel to the length direction of the guide rail 2.
[0040] The shafts of the pressure roller 6 and the winding roller 7 are both located on the same plane; and this plane is parallel to the guide rail 2, which allows the pressure roller 6 to press against the surface of the plastic film. The direction of the pressure roller 6 on the plastic film roll is always the same and always directly opposite the shaft of the winding roller 7, thus improving the winding quality of the plastic film.
[0041] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.
Claims
1. A plastic film online winding mechanism, characterized in that: It includes a winding assembly, which includes a base (1) and a winding roller (7) rotatably connected to the base (1). An inclined surface (101) is provided on the base (1); the height of the inclined surface (101) gradually decreases as it approaches the take-up roller (7); The inclined surface (101) is slidably connected to a pressure roller bracket (3); a pressure roller (6) is rotatably connected to the pressure roller bracket (3); and a counterweight (8) is connected to the pressure roller bracket (3).
2. The online winding mechanism for plastic film according to claim 1, characterized in that: The counterweight (8) is a hollow barrel; the top of the hollow barrel is provided with a water inlet (801); the bottom of the hollow barrel is provided with a drain outlet.
3. The online winding mechanism for plastic film according to claim 1, characterized in that: A connecting plate (5) is fixed on the pressure roller bracket (3); a straight groove (501) is provided on the top surface of the connecting plate (5); a sliding rod (4) is fixed on the counterweight (8); the sliding rod (4) passes through the straight groove (501) from bottom to top; the sliding rod (4) is slidably connected to the straight groove (501); a fixing rod (102) is fixed on the base (1); a guide sleeve (12) is fixed on the fixing rod (102); the guide sleeve (12) is slidably connected to the sliding rod (4); a lifting assembly (9) is fixed on the base (1); the lifting assembly (9) is located at the bottom of the counterweight (8).
4. The online winding mechanism for plastic film according to claim 3, characterized in that: Rollers (11) are distributed on both the upper and lower sides of the connecting plate (5); the rollers (11) are rotatably connected to the sliding rod (4); the wheel body of the rollers (11) is pressed against the surface of the connecting plate (5).
5. The online winding mechanism for plastic film according to claim 3, characterized in that: A guide rail (2) is fixed on the inclined surface (101); a slider (10) that is slidably connected to the guide rail (2) is fixed on the pressure roller bracket (3).
6. The online winding mechanism for plastic film according to claim 5, characterized in that: The axis of the pressure roller (6) and the axis of the take-up roller (7) are arranged parallel to each other; the plane in which the axis of the pressure roller (6) and the axis of the take-up roller (7) are located is the first plane; the first plane is arranged parallel to the length direction of the guide rail (2).