Film coating tension adjusting device of heat-conducting sheet calender

Abstract

The utility model discloses a heat-conducting strip calender laminating tension adjusting device which comprises two supports, a connecting frame fixedly connected between the two supports, a driving mechanism arranged between the two supports, an adjusting roller arranged at the bottom of the driving mechanism, moving blocks rotationally connected to the two ends of the adjusting roller, and a tension adjusting mechanism arranged between the two supports. According to the device, when the tension of a film becomes tight, a driven roller is driven to ascend to trigger an upper limiting sensor, a motor rotates forwards to drive an adjusting roller to move upwards to reduce the tension, otherwise, when the tension becomes loose, the driven roller presses downwards to trigger a lower limiting sensor, and the motor rotates backwards to drive the adjusting roller to move downwards to increase the tension; according to the device, the tension of the thin film is in the optimal tension interval, the structure is simple and reliable, the labor cost and the equipment maintenance difficulty are reduced, meanwhile, the quality problems of thin film wrinkling and tensile deformation caused by improper tension are reduced, and the production efficiency and the product percent of pass of the heat-conducting fins are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of tension adjustment technology for winding products, and specifically relates to a tension adjustment device for coating of a heat-conducting sheet calender. Background Technology

[0002] Silicone thermal conductive sheets are commonly used in household appliances and electronic products. They are a heat-conducting medium that prevents components from overheating, which could slow down equipment operation or cause malfunctions during operation. The general production process of silicone thermal conductive sheets involves the following steps: First, the raw materials are mixed and stirred. A lower film is then applied on a calender. Next, the semi-fluid, viscous mixture is placed on the lower film, and then another lower film is applied on top of the mixture, forming a three-layer coating structure. This allows the raw materials to be easily calendered into sheets of uniform thickness between the upper and lower rollers. Finally, the sheets are sent to an oven for heating and curing.

[0003] When applying the top layer of film, the tension of the film is subject to strict requirements. The tension value cannot be too small or too large. If it is too small, the film will wrinkle when it is applied. If the tension is too large, it will not be able to withstand excessive stretching force, resulting in stretching deformation, which will affect the production efficiency and product qualification rate of the heat-conducting sheet.

[0004] Currently, in the production process of silicone thermal conductive sheets, the traditional tension adjustment method involves manually controlling the forward and reverse rotation of the film unwinding machine to adjust the film tension. However, this method requires workers to be constantly present and manually adjust the tension intermittently. Moreover, the adjusted value may not be exactly within the optimal tension range. In short, the traditional manual adjustment method has high labor costs and the adjusted tension value may not be accurate. To solve the above problems, we provide a thermal conductive sheet calendering machine coating tension adjustment device. Utility Model Content

[0005] The purpose of this invention is to provide a tension adjustment device for coating of thermal conductive sheet in a calendering machine, so as to solve the problem mentioned in the background art that the traditional tension adjustment method for silicone thermal conductive sheet during calendering and coating is expensive in terms of labor costs and the adjusted tension value is not necessarily accurate.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a coating tension adjustment device for a thermally conductive sheet calender, comprising two supports, a connecting frame fixedly connected between the two supports, a driving mechanism provided between the two supports, an adjusting roller provided at the bottom of the driving mechanism, a moving block rotatably connected to both ends of the adjusting roller, a threaded shaft rotatably connected inside the support, the moving block being threadedly connected to the threaded shaft inside, a connecting rod rotatably connected to one side of the support, a driven roller rotatably connected between the two connecting rods, and a limit mechanism provided on the front of the support.

[0007] Preferably, the drive mechanism includes a base plate, with both ends of the base plate fixedly connected to a bracket. A reducer is fixedly connected to the top of the base plate, and a motor is fixedly connected to one side of the reducer. A transmission rod is provided inside the reducer, and a first bevel gear is sleeved at both ends of the transmission rod. A second bevel gear is sleeved at the top of the threaded shaft. The surface of the first bevel gear meshes with the second bevel gear through its teeth. A bearing seat is rotatably connected to the surface of the transmission rod, and the bottom of the bearing seat is fixedly connected to the base plate.

[0008] Preferably, the limiting mechanism includes a mounting plate with an arc-shaped groove inside. Two limiting sensors are installed inside the arc-shaped groove, and two nuts are threaded onto the surface of each limiting sensor. A bolt is fitted inside the mounting plate, and one end of the bolt is threaded onto a bracket.

[0009] Preferably, an auxiliary roller is provided on one side of the bracket, and a mounting frame is rotatably connected to both ends of the auxiliary roller. One side of the mounting frame is fixedly connected to the bracket.

[0010] Preferably, sliders are fixedly connected to both sides of the movable block, and a guide rail adapted to the sliders is fixedly connected to the inner side of the bracket, with the inside of the sliders slidably connected to the guide rails.

[0011] This utility model has the following beneficial effects:

[0012] When the film tension tightens, the driven roller is driven to rise, triggering the upper limit sensor. The motor then rotates forward, driving the adjusting roller to move upward to reduce the tension. Conversely, when the tension loosens, the driven roller presses down, triggering the lower limit sensor. The motor then rotates in reverse, driving the adjusting roller to move downward to increase the tension. This device ensures that the film tension is within the optimal tension range. It has a simple and reliable structure, reduces labor costs and equipment maintenance difficulty, and minimizes quality problems such as film wrinkling and stretching deformation caused by improper tension. This significantly improves the production efficiency and product qualification rate of the thermal conductive sheet. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 3 This is a three-dimensional schematic diagram of a partial structure of this utility model;

[0016] Figure 4 This is a partial exploded view of the structure of this utility model.

[0017] Reference numerals: 1. Bracket; 2. Drive mechanism; 201. Base plate; 202. Reducer; 203. Motor; 204. Transmission rod; 205. First bevel gear; 206. Second bevel gear; 207. Bearing seat; 3. Adjusting roller; 4. Moving block; 5. Threaded shaft; 6. Connecting rod; 7. Driven roller; 8. Limiting mechanism; 801. Mounting plate; 802. Arc groove; 803. Limit sensor; 804. Nut; 805. Bolt; 9. Mounting bracket; 10. Auxiliary roller; 11. Slider; 12. Guide rail; 13. Connecting bracket. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example 1:

[0020] refer to Figure 1-4 A coating tension adjustment device for a thermal conductive sheet calender includes two supports 1, a connecting frame 13 fixedly connected between the two supports 1, a driving mechanism 2 between the two supports 1, an adjusting roller 3 at the bottom of the driving mechanism 2, and movable blocks 4 rotatably connected to both ends of the adjusting roller 3. A threaded shaft 5 is rotatably connected inside the support 1, and the inside of the movable block 4 is threadedly connected to the threaded shaft 5. A connecting rod 6 is rotatably connected to one side of the support 1, and a driven roller 7 is rotatably connected between the two connecting rods 6. A limit mechanism 8 is provided on the front of the support 1.

[0021] Specifically, a first bearing is bolted to one end of the movable block 4, and both ends of the adjusting roller 3 are sleeved with the first bearing, enabling the adjusting roller 3 to be rotatably connected to the movable block 4. The movable block 4 has an internal thread that matches the threaded shaft 5, so that the movable block 4 moves when the threaded shaft 5 rotates. One end of the connecting rod 6 is rotatably connected to the bracket 1 through a pin and a U-shaped frame, and the other end of the connecting rod 6 is fixedly connected to a second bearing. The interior of the second bearing is sleeved with one end of the driven roller 7, allowing the driven roller 7 to rotate through the second bearing.

[0022] refer to Figure 3The drive mechanism 2 includes a base plate 201, with both ends of the base plate 201 fixedly connected to the bracket 1. A reducer 202 is fixedly connected to the top of the base plate 201, and a motor 203 is fixedly connected to one side of the reducer 202. A transmission rod 204 is provided inside the reducer 202, which includes a worm and a worm wheel. The output end of the motor 203 is fixedly connected to the worm via a coupling. The worm can drive the worm wheel to rotate. The interior of the worm wheel is fixedly sleeved with the transmission rod 204, and the worm wheel can drive... The drive rod 204 rotates, and both ends of the drive rod 204 are fitted with first bevel gears 205. The top of the threaded shaft 5 is fitted with a second bevel gear 206. The surface of the first bevel gear 205 meshes with the second bevel gear 206 through its teeth, thereby realizing gear transmission. The surface of the drive rod 204 is rotatably connected to a bearing seat 207. The bottom of the bearing seat 207 is fixedly connected to the base plate 201. By setting the bearing seat 207, the stability of the transmission of the drive rod 204 can be effectively realized.

[0023] refer to Figure 4 The limiting mechanism 8 includes a mounting plate 801, with an arc-shaped groove 802 inside the mounting plate 801. Two limit sensors 803 are installed inside the arc-shaped groove 802, and two nuts 804 are threadedly connected to the surface of the limit sensors 803. The center point of the arc-shaped groove coincides with the center point of rotation of the connecting rod 6. The limit sensors 803 can move inside the arc-shaped groove 802. Then, by rotating the two nuts 804, the nuts 804 can move on the surface of the limit sensors 803, thereby fixing the limit sensors 803 in place. This allows for effective adjustment of the position of the limit sensors 803. Bolts 805 are fitted inside the mounting plate 801, with one end of the bolts 805 threadedly connected to the bracket 1. By setting the bolts 805, the mounting plate 801 and the bracket 1 can be effectively fixed and installed.

[0024] refer to Figure 1 and Figure 2 An auxiliary roller 10 is provided on one side of the support 1. Both ends of the auxiliary roller 10 are rotatably connected to the mounting frame 9. One side of the mounting frame 9 is fixedly connected to the support 1. A third bearing is fixedly sleeved inside the mounting frame 9. The inside of the third bearing is sleeved with one end of the auxiliary roller 10 to realize the rotation of the auxiliary roller 10. By setting the auxiliary roller 10, the film can be transported from top to bottom.

[0025] refer to Figure 1 and Figure 2 Both sides of the movable block 4 are fixedly connected to sliders 11. The inner side of the bracket 1 is fixedly connected to a guide rail 12 that is compatible with the sliders 11. The inside of the sliders 11 is slidably connected to the guide rail 12. When the movable block 4 moves, it causes the sliders 11 to slide on the surface of the guide rail 12, thereby effectively improving the stability of the movement of the movable block 4.

[0026] Brief description of usage: The user can pull one end of the film out of the unwinding machine, pass the film through the bottom of the adjusting roller 3, then through the top of the auxiliary roller 10, and then through the bottom of the driven roller 7. The film is then inserted into the heat-conducting sheet calender for heat-conducting sheet processing. The driven roller 7 contacts the film under its own weight. When the film tension between the heat-conducting sheet calender and the unwinding machine increases, the film will drive the driven roller 7 to rotate upwards via the connecting rod 6. When the connecting rod 6 reaches the sensing range of the upper limit sensor 803, the limit sensor 803 sends a signal to control the motor 203 to rotate forward. The motor 203 drives the transmission rod 204 to rotate via the reducer 202. The transmission rod 204, through the engagement of the first bevel gear 205 and the second bevel gear 206, drives the threaded shaft 5 to rotate. Then, the threaded shaft 5 drives the moving block 4 to move upwards, which in turn drives the adjusting roller 3 to move upwards. This reduces the tension on the film, and the driven roller 7 presses down on the film under its own weight. Roller 7 drives connecting rod 6 to rotate away from the sensing range of limit sensor 803, and then motor 203 stops running. Conversely, when the film tension between the heat-conducting sheet calender and the unwinding machine becomes loose, driven roller 7 presses down on the film by its own weight. When connecting rod 6 rotates to the sensing range of lower limit sensor 803, limit sensor 803 sends a signal to control motor 203 to reverse, causing motor 203 to drive transmission rod 204 to rotate through reducer 202. Transmission rod 204 drives threaded shaft 5 to rotate through the engagement of first bevel gear 205 and second bevel gear 206. Then threaded shaft 5 drives moving block 4 to move downward, causing moving block 4 to drive adjusting roller 3 to move downward, causing adjusting roller 3 to increase the tension of the film. The film causes driven roller 7 to rotate upward through connecting rod 6. At the same time, driven roller 7 drives connecting rod 6 to rotate away from the sensing range of limit sensor 803, and then motor 203 stops running. This effectively and automatically adjusts the film tension between the heat-conducting sheet calender and the unwinding machine.

[0027] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A heat-conducting sheet calender film-coating tension adjusting device comprising two supports (1), characterized in that: A connecting frame (13) is fixedly connected between the two brackets (1), and a driving mechanism (2) is provided between the two brackets (1). An adjusting roller (3) is provided at the bottom of the driving mechanism (2). A moving block (4) is rotatably connected to both ends of the adjusting roller (3). A threaded shaft (5) is rotatably connected inside the bracket (1). The inside of the moving block (4) is threadedly connected to the threaded shaft (5). A connecting rod (6) is rotatably connected to one side of the bracket (1). A driven roller (7) is rotatably connected between the two connecting rods (6). A limit mechanism (8) is provided on the front of the bracket (1).

2. The film tension adjusting device of the heat conducting sheet calendering machine according to claim 1, characterized in that: The drive mechanism (2) includes a base plate (201), both ends of which are fixedly connected to the bracket (1). A reducer (202) is fixedly connected to the top of the base plate (201), and a motor (203) is fixedly connected to one side of the reducer (202). A transmission rod (204) is provided inside the reducer (202). A first bevel gear (205) is sleeved at both ends of the transmission rod (204). A second bevel gear (206) is sleeved at the top of the threaded shaft (5). The surface of the first bevel gear (205) meshes with the second bevel gear (206) through teeth. A bearing seat (207) is rotatably connected to the surface of the transmission rod (204), and the bottom of the bearing seat (207) is fixedly connected to the base plate (201).

3. The film tension adjusting device of the heat conducting sheet calendering machine according to claim 1, characterized in that: The limiting mechanism (8) includes a mounting plate (801), an arc groove (802) is provided inside the mounting plate (801), two limit sensors (803) are provided inside the arc groove (802), two nuts (804) are threadedly connected to the surface of the limit sensors (803), and a bolt (805) is sleeved inside the mounting plate (801), one end of the bolt (805) is threadedly connected to the bracket (1).

4. The film tension adjusting device of the heat conducting sheet calendering machine according to claim 1, characterized in that: An auxiliary roller (10) is provided on one side of the bracket (1), and a mounting frame (9) is rotatably connected to both ends of the auxiliary roller (10). One side of the mounting frame (9) is fixedly connected to the bracket (1).

5. The film tension adjusting device of the heat conducting sheet calendering machine according to claim 1, characterized in that: Both sides of the movable block (4) are fixedly connected to sliders (11), and the inner side of the bracket (1) is fixedly connected to a guide rail (12) that is compatible with the slider (11). The inside of the slider (11) is slidably connected to the guide rail (12).

Images