Film surface embossing mechanism
By using a film embossing mechanism that forms a lever structure with a fixed lower roller shaft, a cylinder, and a connecting rod, the problems of large space occupation and high control costs in existing technologies are solved, resulting in cost reduction, energy consumption reduction, and improved embossing quality and film mechanical properties.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG YONGJIAN MASCH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-16
AI Technical Summary
Existing film embossing mechanisms require two cylinders to drive two rollers respectively, resulting in large space occupation, high control costs, high energy consumption, and high manufacturing costs, which is not conducive to enterprises reducing costs and increasing efficiency.
A fixed lower roller shaft is used in conjunction with a cylinder and connecting rod to form a lever structure. The cylinder drives the upper roller shaft to move up and down, which works in conjunction with the fixed lower roller shaft to complete the embossing process. The lever structure can also be used to increase pressure, and combined with a heating device, better embossing effects can be achieved on low-speed and high-speed production lines.
It reduces manufacturing and installation costs, saves space, reduces energy consumption, and improves the quality of embossing and the mechanical properties of the film edges, as well as the winding quality of the film roll.
Smart Images
Figure CN224360689U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of film stretching technology, and specifically to a film surface embossing mechanism. Background Technology
[0002] Polyester film possesses excellent properties and is currently widely used in specialized fields such as packaging, home decoration, industry, and liquid crystal displays. It has become a hot investment area, especially in the field of optical films. Due to the extremely fierce competition in the optical polyester film market, effective control of the surface quality of the polyester base film or treated film is necessary during production and subsequent post-processing processes such as coating, printing, hot stamping, and lamination to ensure its application in different fields and achieve specific product effects.
[0003] The general process flow for polyester film production is as follows: polyester granules → melt extrusion → casting → longitudinal stretching (MDO) / coating → transverse stretching (TDO) → traction winding → slitting → packaging / deep processing.
[0004] The entire production line consists of a material handling system, a casting machine, a longitudinal stretching machine, a transverse stretching machine, a traction machine, and a winding machine. The traction machine is a crucial component of the entire production line, typically responsible for processes such as cooling, dust removal, thickness inspection, edge trimming, edge embossing, defect detection, and corona treatment after film stretching. The film is then conveyed to the winding machine for winding.
[0005] Some films require embossing at the traction machine position to enhance the mechanical properties of the film edges and improve the winding quality of the film roll.
[0006] Existing film edge embossing mechanisms typically employ an upper and lower roller pressure system. One roller is a smooth roller, and the other is a patterned roller. Each roller is driven by a separate cylinder, which separates or joins them. The embossing effect on the film is usually related to the pressure and temperature of the embossing rollers. The embossing pressure is generally determined by the cylinder pressure. In high-speed film stretching production lines, the embossing rollers are typically electrically heated to achieve a better embossing effect. However, in low-speed production lines, there is usually no electric heating device; only mechanical pressure is applied to the film edge to achieve the embossing effect.
[0007] The existing film embossing mechanism has two cylinders that drive two rollers, which increases the overall space required. In addition, the stability of the film pressing is directly related to the clamping force generated by the cooperation of the two cylinders. Since the extension and retraction of the two cylinders are controlled separately, the control cost increases, and the manufacturing and assembly costs are also high, as does the energy consumption, which is not conducive to the sustainable development of enterprises to reduce costs and increase efficiency. Utility Model Content
[0008] To address the shortcomings of existing technologies, this invention provides a film surface embossing mechanism. By fixing the lower roller shaft and cooperating with a cylinder to control the up and down movement of the upper roller shaft, the film can be embossed. This not only reduces manufacturing costs and space occupation, but also increases the pressure between the two roller shafts by using a lever structure, reducing energy consumption while ensuring the quality of the embossing.
[0009] This utility model is achieved through the following technical solution:
[0010] A film surface embossing mechanism is provided, including a mounting bracket, an upper roller shaft, and a lower roller shaft. The mounting bracket has a mounting seat protruding from one side of its front facade. The lower roller shaft is perpendicular to the front facade, and one end of the lower roller shaft is fixed to the mounting seat by a screw. The mounting bracket has a hinge seat protruding from the other side of its front facade, located below the mounting seat. The mechanism also includes a cylinder and a connecting rod. The base of the cylinder is hinged to the hinge seat via a hinge shaft. One end of the connecting rod is hinged to the piston rod end of the cylinder via a connecting rod hinge shaft. The other end of the connecting rod is perpendicularly fixed to one end of the upper roller shaft by a screw. The connecting rod is hinged to the top of the mounting bracket via a fulcrum hinge shaft.
[0011] This solution uses a cylinder and connecting rod to form a lever structure. A single cylinder can drive the upper roller to move up and down, working in conjunction with the fixed lower roller to complete the embossing process on the film. This effectively reduces manufacturing and installation costs, minimizes space occupation, and the lever structure effectively increases the force of the cylinder, thereby enhancing the pressing force of the upper and lower rollers on the film. This reduces energy consumption while improving the embossing effect, enhancing the edge mechanical properties of the film, and improving the winding quality of the film roll.
[0012] Furthermore, the distance between the fulcrum hinge shaft and the end of the connecting rod that connects to the upper roller shaft is a, and the distance between the fulcrum hinge shaft and the end of the connecting rod that connects to the cylinder piston rod is b, and a < b.
[0013] The fulcrum hinge is positioned close to the upper roller shaft, resulting in different lever arms on both sides of the fulcrum hinge. This allows the lever principle to be used to increase the force provided by the cylinder. The ratio of the two lever arms is the amplification factor of the cylinder force, which can effectively reduce energy consumption and ensure stable pressure between the two roller shafts.
[0014] Preferably, the axis of the upper roller shaft, the axis of the fulcrum hinge shaft, and the axis of the connecting rod hinge shaft are located on the same plane.
[0015] The axes of the upper roller shaft, the fulcrum hinge shaft, and the connecting rod hinge shaft are located in the same plane, which makes it easy to adjust the size of the lever arm on both sides of the support hinge shaft according to the needs of use, thereby making the force of the upper and lower roller shafts more stable when the cylinder is in action.
[0016] Furthermore, pressure rollers are rotatably mounted on the ends of both the upper and lower roller shafts via bearings.
[0017] By mounting a pressure roller on the end of the roller shaft with a bearing, the rotating pressure roller can press the passing film. Dynamic pressing can be performed during the film's movement, which is convenient and improves pressing efficiency.
[0018] Furthermore, the pressure roller on the lower roller shaft is an embossed roller with a patterned surface, while the pressure roller on the upper roller shaft is a smooth roller.
[0019] The pressure roller on the lower roller shaft has a patterned surface, while the pressure roller on the upper roller shaft has a smooth surface. The upper roller shaft can be moved downward to apply force to the lower roller shaft, and then the clamping force can be used to press the patterned edge of the film passing between the two. The upper roller shaft is set as a smooth roller to facilitate separation from the film after pressing.
[0020] Furthermore, a heating cover for heating the pressure roller is installed on the mounting bracket directly below the pressure roller at the end of the lower roller shaft via a support rod. The heating cover has a heating groove recessed into the inner wall of the pressure roller, and an electric heating tube is installed in the heating groove. A heat-conducting copper plate is provided at the opening of the heating groove.
[0021] By installing a heating cover below the pressure roller at the end of the lower roller shaft, the pressure roller can be heated by an electric heating tube in conjunction with a heat-conducting copper plate. This method is suitable for high-speed film stretching production lines and can achieve better embossing effects.
[0022] Preferably, the heating cover has an arc-shaped cross-section, and the central angle of the heating cover is 180°~210°.
[0023] The heating cover is arc-shaped and placed on the lower surface of the pressure roller. By adjusting its central angle to 180~210°, it can better cover the surface of the pressure roller, improve the heating efficiency of the pressure roller, and at the same time provide heat preservation and reduce heat loss.
[0024] The beneficial effects of this utility model are:
[0025] This invention features a fixed lower roller shaft and an upper roller shaft hinged to the piston rod of a cylinder via a connecting rod and mounting bracket. A single cylinder can control the distance between the upper and lower roller shafts, thereby achieving pattern pressing on the film passing between the two roller shafts. This not only reduces manufacturing costs and saves space, but also, by adjusting the hinge position between the connecting rod and the mounting bracket, the lever arm on both sides of the hinge shaft can be adjusted. This leverage principle amplifies the force applied by the cylinder, thus reducing energy consumption while maintaining the pressure for pattern pressing. This effectively reduces production costs, improves the embossing effect, enhances the edge mechanical properties of the film, and improves the winding quality of the film roll.
[0026] This invention allows for the selection of heating covers to suit both low-speed and high-speed film production lines, based on the requirements of different production lines, thereby achieving better embossing effects. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.
[0028] Figure 2 for Figure 1 Cross-sectional view of AA.
[0029] Figure 3 for Figure 1 Top view.
[0030] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model.
[0031] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.
[0032] As shown in the figure:
[0033] 1. Mounting bracket; 2. Cylinder; 3. Connecting rod; 4. Upper pressure roller; 5. Lower pressure roller; 6. Bearing; 7. Screw; 8. Upper roller shaft; 9. Lower roller shaft; 10. Pivot hinge shaft; 11. Connecting rod hinge shaft; 12. Mounting base; 13. Hinge base; 14. Support pole; 15. Heating cover; 16. Electric heating tube; 17. Heating tank; 18. Heat-conducting copper plate. Detailed Implementation
[0034] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.
[0035] Example 1:
[0036] like Figures 1-3 As shown, a film surface embossing mechanism includes a mounting bracket 1, an upper roller shaft 8, and a lower roller shaft 9. The mounting bracket 1 has a mounting seat 12 protruding from one side of its frontal facade. The lower roller shaft 9 is perpendicular to the frontal facade, and one end of the lower roller shaft 9 is fixed to the mounting seat 12 by a screw 7. The mounting bracket 1 has a hinge seat 13 protruding from the other side of its frontal facade, located below the mounting seat 12. A lower pressure roller 5 is rotatably sleeved at the end of the lower roller shaft 9 via a bearing 6. The lower pressure roller 5 is a hollow embossing roller sleeve with a patterned surface, and the patterned area has been hardened. The mechanism also includes a cylinder 2 and a connecting rod 3. The cylinder 2 performs telescopic movement through a separate control air circuit. The base of the cylinder 2 is hinged to the hinge seat 13 via a hinge shaft. One end of the connecting rod 3 is hinged to the piston rod end of the cylinder 2 via a connecting rod hinge shaft 11. The other end of the connecting rod 3 is perpendicularly fixed to one end of the upper roller shaft 8 by a screw 7. The connecting rod 3 is hinged to the top of the mounting bracket 1 via a fulcrum hinge shaft 10. The upper roller 8 is rotatably mounted on the end of the upper roller shaft 8 via the bearing 6. The upper roller 4 is a hollow smooth roller sleeve with a smooth roller surface.
[0037] like Figure 1 As shown, the distance between the fulcrum hinge 10 and the end of the connecting rod 3 that connects to the upper roller 8 is a, and the distance between the fulcrum hinge 10 and the end of the connecting rod 3 that connects to the piston rod of the cylinder 2 is b, and a < b. a and b represent the magnitudes of the lever arms on both sides of the fulcrum hinge 10, and the ratio of b / a is the amplification factor of the pressure of the cylinder 3.
[0038] The axis of the upper roller shaft 8, the axis of the fulcrum hinge shaft 10, and the axis of the connecting rod hinge shaft 11 are located on the same plane.
[0039] The working process of this utility model is as follows: Figure 1 As shown by the arrow, when the film moves in the direction shown, the piston rod of cylinder 2 extends, and the upper pressure roller 4 moves downward along the fulcrum hinge shaft 10 under the drive of cylinder 2, pressing the film between the upper pressure roller 4 and the lower pressure roller 5 for embossing. The embossing pressure comes from the pressure of cylinder 2, and the leverage effect of connecting rod 3 increases the pressure provided by cylinder 2. Since the lever arm b on both sides of the fulcrum hinge shaft 10 is much larger than the lever arm a, the ratio of lever arm b / a is the amplification factor of the pressure of cylinder 2. Through the force amplification effect, a single cylinder 2 can meet the pressure requirements of two rollers for embossing, reducing costs and saving installation space. When there is no film, cylinder 2 moves in the opposite direction, and the connecting rod 3 drives the upper pressure roller 4 away from the lower pressure roller 5, which can stop the embossing process on the film.
[0040] Example 2:
[0041] like Figures 4-5 As shown, in this embodiment, based on Embodiment 1, a heating cover 15 is added to the mounting bracket 1. The heating cover 15, which heats the lower pressure roller 5, is mounted on the mounting bracket 1 directly below the lower pressure roller 5 at the end of the lower roller shaft 9 via a support rod 14. A heating groove 17 is recessed into the inner wall of the heating cover 15, directly opposite the lower pressure roller 5. Several electric heating tubes 16 are installed within the heating groove 17. A heat-conducting copper plate 18 is provided at the opening of the heating groove 17, and the heat-conducting copper plate 18 has the same curvature as the heating cover 15 and the heating groove 17. The electric heating tubes 16 are connected to a power cord and have a built-in temperature control device, enabling constant temperature heating. Different heating temperatures can be set according to different film products, allowing for continuous constant temperature heating. This, combined with the heat-conducting copper plate 18, ensures effective heating of the pressure roller.
[0042] In this embodiment, the heating cover has an arc-shaped cross-section and a central angle of 210°. It can be placed around the lower surface of the pressure roller and uses a heat-conducting copper plate to transfer the heat from the electric heating tube to heat the pressure roller. This can work with the pressure roller to achieve a better embossing effect on the edge of the film on a high-speed film production line, enhance the mechanical properties of the film edge, and improve the winding quality of the film roll.
[0043] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.
Claims
1. A film surface embossing mechanism, comprising a mounting bracket, an upper roller shaft, and a lower roller shaft, characterized in that: The mounting bracket has a mounting seat protruding on one side of its front facade. The lower roller shaft is perpendicular to the front facade, and one end of the lower roller shaft is fixed to the mounting seat with screws. The mounting bracket has a hinge seat protruding on the other side of its front facade, located below the mounting seat. It also includes a cylinder and a connecting rod. The base of the cylinder is hinged to the hinge seat via a hinge shaft. One end of the connecting rod is hinged to the piston rod end of the cylinder via a connecting rod hinge shaft. The other end of the connecting rod is perpendicularly fixed to one end of the upper roller shaft with screws. The connecting rod is hinged to the top of the mounting bracket via a fulcrum hinge shaft.
2. The film surface embossing mechanism according to claim 1, characterized in that: The distance between the fulcrum hinge shaft and the end of the connecting rod that connects to the upper roller shaft is a, and the distance between the fulcrum hinge shaft and the end of the connecting rod that connects to the cylinder piston rod is b, and a < b.
3. The film surface embossing mechanism according to claim 1, characterized in that: The axis of the upper roller shaft, the axis of the fulcrum hinge shaft, and the axis of the connecting rod hinge shaft are located on the same plane.
4. The film surface embossing mechanism according to claim 1, characterized in that: Pressure rollers are mounted on the ends of both the upper and lower roller shafts via bearings.
5. The film surface embossing mechanism according to claim 4, characterized in that: The pressure roller on the lower roller shaft is an embossed roller with a patterned surface, while the pressure roller on the upper roller shaft is a smooth roller.
6. The film surface embossing mechanism according to claim 4, characterized in that: A heating cover for heating the pressure roller is installed on the mounting bracket directly below the pressure roller at the end of the lower roller shaft via a support rod. The heating cover has a heating groove recessed into the inner wall of the pressure roller, and an electric heating tube is installed in the heating groove. A heat-conducting copper plate is installed at the opening of the heating groove.
7. The film surface embossing mechanism according to claim 6, characterized in that: The heating cover has an arc-shaped cross-section, and the central angle of the heating cover is 180°~210°.