Temperature control module for surface treatment of a film material

Abstract

The utility model discloses a kind of temperature control module for membrane surface treatment, including oven and heating unit being set in its inside, still including drive box being fixed to the top of oven, mounting seat being set in the inside of oven and lifting drive mechanism driving the vertical lifting of mounting seat;The top of the mounting seat is provided with vertical guide mechanism, and the guide mechanism includes guide seat being fixed to the top of oven and guiding column being fixedly connected with the mounting seat and slidingly cooperating with the guide seat.

Description

Technical Field

[0001] This utility model relates to the field of thin film production technology, and in particular to a temperature control module for film surface treatment. Background Technology

[0002] In the field of membrane manufacturing, especially in the surface treatment processes of high-end optical films and special functional films, the oven is a key piece of equipment for completing coating curing and drying. Its temperature control accuracy and response speed directly determine the surface performance and yield of the final product. As the industry's requirements for film performance continue to increase, oven temperature control technology has also evolved from the initial basic constant temperature heating to the current stage of precise control that can achieve multi-segment and multi-parameter settings.

[0003] Currently, these products generally use temperature control by adjusting the power of the heating unit or the volume of hot air. However, this traditional method has inherent technical drawbacks: the heating unit and its supporting structure have significant thermal inertia. When the sensor detects a temperature deviation and issues a command, the system cannot immediately generate an effective temperature change, resulting in a significant adjustment delay. For the production of high-end membrane materials, this thermal response lag causes the membrane material to experience an unstable thermal history during instantaneous speed changes or process adjustments, leading to uneven coating curing, decreased adhesion, substandard optical performance, and a series of other quality problems, severely restricting the manufacturing and yield improvement of high-end products.

[0004] Therefore, it is necessary to improve and optimize the structure of the existing temperature control module for membrane surface treatment in order to fundamentally solve the problem of temperature control adjustment delay caused by thermal inertia. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a temperature control module for membrane surface treatment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a temperature control module for film surface treatment, including an oven and a heating unit disposed therein, and further including a drive box fixed to the top of the oven, a mounting base disposed inside the oven, and a lifting drive mechanism for driving the mounting base to rise and fall vertically. The lifting drive mechanism includes a servo motor, a reducer, a worm gear, a worm wheel, a screw, and a heat insulation rod. The servo motor and reducer are fixed to the top of the oven and located inside the drive housing. The output shaft of the servo motor is connected to the input end of the reducer, and the output end of the reducer is connected to a horizontal worm gear. A rotating seat is also fixed to the top of the oven, and a worm wheel with a vertical axis is rotatably connected to the rotating seat. The worm wheel meshes with the worm gear. A threaded hole is opened at the center of the worm wheel along its axial direction, and a screw is threaded vertically into the threaded hole. The lower end of the screw is fixedly connected to the mounting base located inside the oven through the heat insulation rod. A vertical guide mechanism is provided above the mounting base. The guide mechanism includes a guide seat fixed to the top of the oven and a guide column fixedly connected to the mounting base and slidingly engaged with the guide seat.

[0007] The mounting base is made of either an aluminum alloy frame structure or a carbon fiber composite frame structure.

[0008] The multiple sets of heating units are infrared heating tubes or ceramic heating plates, and the multiple sets of heating units are evenly distributed along the length of the mounting base and fixed to its bottom.

[0009] The front wall of the drive box has an exhaust window, and a fan is fixed on the inner front wall of the drive box, which is directly opposite the exhaust window; the rear wall of the drive box has an air inlet window.

[0010] A filter screen is installed at the opening of the air inlet window.

[0011] The contact area between the top of the oven and the bottom of the drive box is covered with heat insulation cotton.

[0012] The heat insulation rod is made of low thermal conductivity ceramic.

[0013] This utility model has the following beneficial effects: By introducing a precise mechanical lifting mechanism to directly adjust the distance between the heating unit and the membrane surface, a transformation from traditional, slow heat power adjustment to rapid, direct heat radiation intensity adjustment is achieved. This fundamentally overcomes the control delay problem caused by the thermal inertia of the heating system itself, significantly improves the temperature control response speed and dynamic adjustment accuracy, and effectively ensures the stability and uniformity of the thermal history of high-end membrane materials during production. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the planar structure of the present invention; Figure 3 This is a magnified view of a portion of point A.

[0015] Legend: 1. Oven; 2. Drive box; 3. Guide seat; 4. Guide column; 5. Exhaust window; 6. Mounting seat; 7. Heating unit; 8. Air inlet window; 9. Fan; 10. Insulation rod; 11. Rotating seat; 12. Screw; 13. Reducer; 14. Servo motor; 15. Worm gear; 16. Worm wheel; 17. Insulation cotton. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Reference Figures 1 to 3 The temperature control module for surface treatment of this membrane material mainly includes an oven 1, a drive box 2, a mounting base 6, a heating unit 7, and a precision lifting drive mechanism.

[0018] To isolate the power source from the high-temperature environment and achieve precise linear displacement control, the lifting drive mechanism includes a servo motor 14, a reducer 13, a worm gear 15, a worm wheel 16, a screw 12, and a heat insulation rod 10. The servo motor 14 and reducer 13 are fixed to the top of the oven 1 and located inside the drive housing 2. The output shaft of the servo motor 14 is connected to the input end of the reducer 13, and the output end of the reducer 13 is connected to the horizontal worm gear 15. A rotating seat 11 is also fixed to the top of the oven 1. A worm wheel 16 with a vertical axis is rotatably connected to the rotating seat 11, and the worm wheel 16 meshes with the worm gear 15. A threaded hole is formed at the center of the worm wheel 16 along its axial direction, and a screw 12 is vertically threaded into this threaded hole. The lower end of the screw 12 is fixedly connected to a mounting base 6 located inside the oven 1 via the heat insulation rod 10. With the above structure, when the servo motor 14 receives the control signal, the power is increased to torque by the reducer 13, and the worm gear 16 is driven to rotate by the worm 15, which is then converted into the precise vertical linear motion of the screw 12. Finally, the heat insulation rod 10 pushes the entire mounting base 6 to rise and fall smoothly. During this process, the heat insulation rod 10 effectively blocks the high temperature inside the oven 1 from being transmitted to the servo motor 14 and reducer 13 at the top, ensuring the long-term stable operation of the precision drive components.

[0019] To ensure that the wide mounting base 6 does not tilt or jam during lifting and lowering, and to guarantee that the heating unit 7 on it remains parallel to the membrane surface, a vertical guide mechanism is provided above the mounting base 6. This guide mechanism includes a guide seat 3 fixed to the top of the oven 1 and a guide column 4 fixedly connected to the mounting base 6 and slidingly engaged with the guide seat 3. When the mounting base 6 is driven to lift and lower, the guide column 4 slides vertically along the inner wall of the guide seat 3. Through this structure, the guide mechanism constrains the mounting base 6 to move only in the vertical direction, eliminating any horizontal offset or rotational tendency, ensuring absolute synchronization and stability of the wide heating surface during dynamic adjustment, thereby guaranteeing the uniformity of lateral heating of the membrane material.

[0020] To reduce the mass of moving parts while ensuring structural strength, thereby lowering the load on the lifting drive mechanism and achieving faster dynamic response, the mounting base 6 is constructed from either an aluminum alloy frame structure or a carbon fiber composite frame structure. Multiple heating units 7, which are infrared heating tubes or ceramic heating plates, are evenly distributed along the length of the mounting base 6 and fixed to its bottom. This structure provides a foundation for high-speed lifting with the lightweight mounting base 6, while the evenly distributed heating units 7 along its length create a stable and uniform radiant heating surface across the entire width of the membrane material.

[0021] To address the overheating risk caused by the concentrated installation of heat-generating components such as the servo motor 14 and reducer 13 within the drive housing 2, and to prevent performance degradation or damage to precision electrical components due to high temperatures, an exhaust vent 5 is provided on the front wall of the drive housing 2, with a fan 9 fixed to the inner front wall directly opposite the exhaust vent 5; an air inlet vent 8 is provided on the rear wall of the drive housing 2. Through this structure, when the fan 9 operates, it actively draws in cool ambient air through the air inlet vent 8, forming a cooling airflow that passes over the surfaces of the servo motor 14 and reducer 13, and forcibly expels hot air from the exhaust vent 5, thereby achieving efficient active heat dissipation inside the drive housing 2.

[0022] To prevent dust, fibers, and other pollutants from the external environment from entering the drive housing 2 with the airflow and adhering to the servo motor 14 or reducer 13, thus affecting their heat dissipation and normal operation, a filter screen is installed at the opening of the air inlet 8. When the fan 9 is working, all air entering the drive housing 2 must pass through this filter screen. Through the above structure, the filter screen can effectively intercept most particulate pollutants in the air, providing a relatively clean operating environment for the precision transmission and control system inside the drive housing 2.

[0023] To further prevent the high temperature inside the oven 1 from being directly conducted to the drive chamber 2 through the metal walls, thus avoiding further temperature rise, heat insulation cotton 17 is laid in the contact area between the top of the oven 1 and the bottom of the drive chamber 2. Through this structure, the heat insulation cotton 17 forms an effective thermal barrier between the oven 1 and the drive chamber 2, significantly reducing the heat conduction path. Working in conjunction with the active cooling system, it ensures that the drive chamber 2 is kept at a suitable operating temperature.

[0024] To ensure the reliable operation of the transmission components connecting the screw 12 and the mounting base 6 under prolonged high-temperature conditions without becoming a significant thermal bridge, the heat insulation rod 10 is made of low thermal conductivity ceramic. Through this structure, the heat insulation rod 10, made of low thermal conductivity ceramic, possesses both the mechanical strength required to transmit push and pull forces and, due to its extremely low thermal conductivity, can maximally prevent heat from the oven 1 from being transferred to the screw 12 and rotating base 11 and other mechanical structures above it. It is a key component ensuring the stable operation of the entire lifting drive system on the high-temperature side.

[0025] Working Principle: The core of the working principle of the temperature control module for membrane surface treatment described in this utility model lies in rapidly changing the distance between the heating unit and the membrane surface through a precise electromechanical system, thereby achieving instantaneous and precise adjustment of the intensity of the radiant heat field to overcome the inherent thermal inertia delay of traditional power control methods. Its specific working process is as follows: 1. Initial signal reception and command parsing When the temperature sensor installed inside oven 1 detects a deviation of the current temperature from the process setpoint, or when there is a planned change in the production line's operating speed, the central controller immediately generates a control command. The core objective of this command is to quickly adjust the effective thermal radiation intensity between the heating unit 7 and the film material to the new required level. This command is sent to the servo motor 14 of the lifting drive mechanism.

[0026] 2. Power transmission and motion conversion Upon receiving a command, the servo motor 14 begins to rotate, and its output power is first transmitted to the reducer 13. The reducer 13 reduces the rotational speed and increases the output torque to ensure sufficient driving force for smoothly raising and lowering the mounting base 6 and all the heating units 7 on it. After adjustment by the reducer 13, the power drives the horizontal worm gear 15 to rotate through its output end. The rotation of the worm gear 15 drives the worm wheel 16, which meshes with it and has its axis perpendicular to the rotation. Since the worm wheel 16 has a threaded hole in its center, and the screw 12 is vertically threaded into this hole, when the worm wheel 16 rotates, it forces the screw 12 to make a precise linear motion in the vertical direction. The transmission combination of the worm wheel 16 and the worm gear 15 not only realizes the conversion of the direction of motion, but also, due to its self-locking characteristic, ensures that the mounting base 6 is reliably locked in any position and will not slide down due to its own weight.

[0027] 3. Thermally insulated transmission and overall lifting The screw 12, which moves in a linear motion, has its lower end fixedly connected to the mounting base 6 located inside the high-temperature zone of the oven 1 via a heat-insulating rod 10 made of low thermal conductivity ceramic. The heat-insulating rod 10 plays a crucial dual role in transmission and thermal insulation: it transmits the mechanical driving force from the top to the mounting base 6 without damage, while effectively preventing the high temperature inside the oven 1 from being conducted to precision components such as the servo motor 14 and the reducer 13 at the top. When the screw 12 pushes or pulls the heat-insulating rod 10, the mounting base 6 rises or falls vertically accordingly.

[0028] 4. Motion guidance and thermal field regulation During the lifting and lowering of the mounting base 6, the guide column 4, which is fixedly connected to it, slides vertically within the guide seat 3 fixed to the top of the oven 1. This vertical guiding mechanism ensures that the wide mounting base 6 and the heating units 7 distributed on it maintain absolute stability and synchronization during movement, always remaining parallel to the surface of the membrane material running below, thus ensuring the uniformity of lateral heating of the membrane material. By changing the distance between the heating unit 7 and the surface of the membrane material, based on the strong nonlinear relationship between radiative heat transfer intensity and distance, the actual heat energy received by the membrane material can be changed instantaneously and significantly without waiting for the power of the heating unit 7 to change, realizing a fundamental shift from "adjusting the heat source power" to "adjusting the effective heat flux".

[0029] 5. System heat dissipation guarantee Throughout the operation, the cooling fan 9 inside the drive housing 2 continuously operates, drawing in clean, cool air through the air inlet 8 on the rear wall (equipped with a filter) to cool the servo motor 14 and reducer 13, before expelling the hot air through the exhaust vent 5 on the front wall. Simultaneously, the insulation cotton 17 laid in the contact area between the top of the oven 1 and the bottom of the drive housing 2 further blocks heat conduction. These two measures together provide a low-temperature, clean, and reliable operating environment for the precision drive system at the top.

[0030] In summary, this invention replaces "pure power regulation" with "mechanical displacement adjustment," transforming the temperature control response from a slow thermal process to a rapid mechanical process, thereby achieving rapid and precise dynamic control of the oven heat treatment process parameters.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A temperature control module for membrane surface treatment, characterized in that: The device includes an oven (1) and a heating unit (7) disposed therein, as well as a drive box (2) fixed to the top of the oven (1), a mounting base (6) disposed inside the oven (1), and a lifting drive mechanism for driving the mounting base (6) to move vertically up and down; the lifting drive mechanism includes a servo motor (14), a reducer (13), a worm (15), a worm wheel (16), a screw (12), and a heat insulation rod (10); the servo motor (14) and the reducer (13) are fixed to the top of the oven (1) and located inside the drive box (2), the output shaft of the servo motor (14) is connected to the input end of the reducer (13), and the output end of the reducer (13) is connected to a horizontal worm (16). 5) A rotating seat (11) is fixed on the top of the oven (1). A worm wheel (16) with a vertical axis is rotatably connected to the rotating seat (11). The worm wheel (16) meshes with the worm (15). A threaded hole is opened at the center of the worm wheel (16) along its axial direction. A screw (12) is threaded vertically into the threaded hole. The lower end of the screw (12) is fixedly connected to the mounting seat (6) located inside the oven (1) through the heat insulation rod (10). A vertical guide mechanism is provided above the mounting seat (6). The guide mechanism includes a guide seat (3) fixed to the top of the oven (1) and a guide column (4) fixedly connected to the mounting seat (6) and slidingly engaged with the guide seat (3).

2. The temperature control module for membrane surface treatment according to claim 1, characterized in that: The mounting base (6) is made of either an aluminum alloy frame structure or a carbon fiber composite frame structure.

3. The temperature control module for membrane surface treatment according to claim 1, characterized in that: The multiple sets of heating units (7) are infrared heating tubes or ceramic heating plates. The multiple sets of heating units (7) are evenly distributed along the length of the mounting base (6) and fixed to its bottom.

4. The temperature control module for membrane surface treatment according to claim 1, characterized in that: The front wall of the drive box (2) is provided with an exhaust window (5), and a fan (9) is fixed on the inner front wall of the drive box (2) and is directly opposite the exhaust window (5); the rear wall of the drive box (2) is provided with an air inlet window (8).

5. A temperature control module for membrane surface treatment according to claim 4, characterized in that: The air inlet window (8) is equipped with a filter screen.

6. The temperature control module for membrane surface treatment according to claim 5, characterized in that: The contact area between the top of the oven (1) and the bottom of the drive box (2) is covered with heat insulation cotton (17).

7. A temperature control module for membrane surface treatment according to claim 6, characterized in that: The heat insulation rod (10) is made of low thermal conductivity ceramic.

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