A film calendering device

Abstract

The utility model discloses a kind of film calendering devices, belong to calendering processing technical field, comprising: heat preservation box;Two fixed calender rolls, are rotationally connected with heat preservation box by pivot;Vertical electric push rod, inlayed installation is at the top of heat preservation box, the moving part of vertical electric push rod is connected with lifting lug, the inner wall of lifting lug is rotationally connected with movable calender roll by pivot, the outer periphery of lifting lug and the outer periphery of heat preservation box are all installed with the speed regulation motor that pivot is provided with power;Two air barrels, respectively installed at the top and bottom of heat preservation box, the inner wall of air barrel is installed with heating pipe and heat -resistant fan, the two sides of air barrel are all communicated with heat preservation box by multiple air pipes, movable calender roll and two fixed calender rolls are in triangular shape arrangement, movable calender roll is cooperated with two fixed calender rolls, for calendering to film. The film calendering device, not only can heat temperature adjustment, but also can adjust calendering effect.

Description

Technical Field

[0001] This utility model belongs to the field of calendering technology, and in particular to a film calendering device. Background Technology

[0002] Thermoplastic material, already plasticized and close to its viscous flow temperature, is subjected to compression and stretching through a series of opposing horizontal rollers, resulting in a thin sheet product with a certain thickness, width, and smooth surface. The sheets of hydraulic hoses are calendered before use; however, during processing, different materials require different temperatures, and the lack of external temperature control affects the calendering effect.

[0003] A search revealed a Chinese patent document (authorization announcement number CN222844573U) regarding a thermally conductive silicone sheet calendering device. The device includes a forming frame, with a first pressure roller rotatably mounted on the inner wall of the frame, and a second pressure roller mounted on the inner wall of the frame via a lifting assembly. Cleaning components are installed on the outer walls of both the first and second pressure rollers. This invention relates to the field of thermally conductive silicone sheet production technology. The thermally conductive silicone sheet calendering device uses drive motors on the first and second pressure rollers to drive corresponding roller shafts to rotate synchronously at the same speed. The roller shafts drive the first and second pressure rollers to calender the thermally conductive silicone sheet. A second pulley drives a rotating shaft, a cleaning roller, and a cleaning brush to rotate. The cleaning brush cleans the calendered material from the surfaces of the first and second pressure rollers, and a scraper removes the calendered material from their surfaces. This allows for simultaneous scraping and cleaning of the calendered surfaces of the first and second pressure rollers during the calendering of the thermally conductive silicone sheet, preventing any impact on subsequent calendering quality. While the aforementioned patent can guarantee the calendering effect, different materials require different temperatures, and the lack of external temperature control will affect the calendering effect. Utility Model Content

[0004] The purpose of this invention is to provide a film calendering device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a film calendering apparatus, comprising: Insulated box; Both fixed pressure rollers are rotatably connected to the insulation box via a rotating shaft; A vertical electric actuator is embedded in the top of the insulation box. The moving part of the vertical electric actuator is connected to a lifting lug. The inner wall of the lifting lug is rotatably connected to a movable pressure roller via a rotating shaft. Speed-regulating motors that provide power to the rotating shaft are installed on the outer periphery of the lifting lug and the outer periphery of the insulation box. Two air tanks are installed at the top and bottom of the insulated box, respectively. The inner wall of the air tank is equipped with heating pipes and heat-resistant fans. Both sides of the air tank are connected to the insulated box through multiple ventilation pipes.

[0006] In a preferred embodiment, the movable pressure roller and the two fixed pressure rollers are arranged in a triangular pattern, and the movable pressure roller cooperates with the two fixed pressure rollers to calender the film.

[0007] As a preferred embodiment, the rotation direction of the speed-regulating motor of the movable pressure roller is opposite to that of the speed-regulating motors of the two fixed pressure rollers, and the three speed-regulating motors rotate at the same speed.

[0008] As a preferred embodiment, the top of the insulated box is embedded with multiple limiting tubes, and the top of the lifting lug is welded with a limiting rod that matches the limiting tubes.

[0009] As a preferred embodiment, multiple temperature sensors are installed on the inner walls of both the air tank and the insulation box, and a maintenance plate is rotatably connected to the side of the insulation box, with a viewing window embedded in the side of the maintenance plate.

[0010] As a preferred embodiment, the insulated box has material passages on both sides, and the inner wall of the material passages is rotatably connected to two parallel guide rollers for guiding.

[0011] As a preferred embodiment, the inner wall of the insulated box and the inner wall of the lifting lugs are both connected to a cleaning shovel, and multiple support legs are welded to the bottom of the insulated box.

[0012] Compared with the prior art, the technical effects and advantages of this utility model are as follows: This film calendering device benefits from the design of the insulation box and air tank. The operation of the heating tube and heat-resistant fan in the air tank allows the heat-resistant fan to blow the air heated by the heating tube from one side of the air tank into the insulation box, where the air is heated. Then the air returns to the air tank from the other side, achieving cyclic heating. This not only meets the needs of different temperatures but also ensures temperature uniformity. The design of two air tanks allows for uniform heating of both sides of the film, improving uniformity. This film calendering device benefits from the design of the vertical electric push rod. By adjusting the vertical electric push rod, the distance between the movable pressure roller and the two fixed pressure rollers can be changed to meet the calendering operation needs of different requirements. The cooperation of the limit tube and the limit rod can improve the stability of the lifting lug and the movable pressure roller. This film calendering device can not only heat and adjust the temperature, but also regulate the calendering effect. Attached Figure Description

[0013] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the insulated box and guide roller of this utility model; Figure 3 This is a right-side view of the movable pressure roller and the vertical electric actuator of this utility model; Figure 4 This is a cross-sectional view of the air tank of this utility model.

[0015] Explanation of reference numerals in the attached figures: In the picture: 1. Insulation box; 2. Fixed pressure roller; 3. Vertical electric actuator; 4. Lifting lug; 5. Movable pressure roller; 6. Speed-regulating motor; 7. Air tank; 8. Heating tube; 9. Heat-resistant fan; 10. Vent pipe; 11. Limiting tube; 12. Limiting rod; 13. Temperature sensor; 14. Inspection plate; 15. Guide roller; 16. Shovel plate; 17. Support leg. Detailed Implementation

[0016] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0017] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0018] Please see Figures 1 to 4 As shown, a film calendering apparatus, in this embodiment including: Insulated box 1; Both fixed pressure rollers 2 are rotatably connected to the heat preservation box 1 via rotating shafts; A vertical electric actuator 3 is embedded in the top of the insulation box 1. The moving part of the vertical electric actuator 3 is connected to a lifting lug 4. The inner wall of the lifting lug 4 is rotatably connected to a movable pressure roller 5 via a rotating shaft. Speed-regulating motors 6 that provide power to the rotating shaft are installed on the outer periphery of the lifting lug 4 and the outer periphery of the insulation box 1. The movable pressure roller 5 and two fixed pressure rollers 2 are arranged in a triangular pattern. The movable pressure roller 5 cooperates with the two fixed pressure rollers 2 to calender the film. The rotation direction of the speed-regulating motor 6 of the movable pressure roller 5 is opposite to the rotation direction of the speed-regulating motor 6 of the two fixed pressure rollers 2. The three speed-regulating motors 6 have the same speed. Adjusting the vertical electric actuator 3 changes the distance between the movable pressure roller 5 and the two fixed pressure rollers 2. The film is placed in place, and the speed-regulating motor 6 is turned on. The speed-regulating motor 6 drives the rotating shaft to rotate, which in turn drives the fixed pressure rollers 2 and the movable pressure roller 5 to rotate, thereby realizing the calendering operation of the film. Two air tanks 7 are installed at the top and bottom of the insulation box 1, respectively. The inner wall of the air tank 7 is equipped with heating tubes 8 and heat-resistant fans 9. The air blowing position of the heat-resistant fan 9 is at the feeding position, where the temperature needs to be relatively high. The heating tubes 8 are adjustable heating devices, and multiple units are set to facilitate adjustment of power and number of units to change the heating temperature. Both sides of the air tank 7 are connected to the insulation box 1 through multiple air pipes 10. Multiple temperature sensors 13 are installed on the inner wall of the air tank 7 and the inner wall of the insulation box 1. According to the material of the film and the temperature requirements, a specified number of heating tubes 8 are turned on in advance, and the heat-resistant fans 9 are turned on to circulate the air. The temperature of each part inside the insulation box 1 is monitored from the temperature sensors 13.

[0019] To improve stability, multiple limiting tubes 11 are embedded in the top of the insulated box 1, and a limiting rod 12 adapted to the limiting tubes 11 is welded to the top of the lifting lug 4.

[0020] To meet usage requirements, an inspection plate 14 is rotatably connected to the side of the insulated box 1, and a viewing window is embedded in the side of the inspection plate 14.

[0021] Both sides of the heat preservation box 1 are provided with material passages, and the inner wall of the material passages is rotatably connected to two parallel guide rollers 15 for guiding.

[0022] The inner wall of the insulated box 1 and the inner wall of the lifting lug 4 are both connected to a cleaning shovel 16, and multiple support legs 17 are welded to the bottom of the insulated box 1.

[0023] If one of the lower shovel plates 16 is removed, the film can pass through only one fixed pressure roller 2 and one movable pressure roller 5, thus achieving double-roll calendering.

[0024] This application is conducted in a high-temperature environment. All structures and instruments are heat-resistant and are regularly replaced and maintained.

[0025] I. Calendering Temperature of Natural Rubber (NR) Sheets Natural rubber has good plasticity and a relatively low calendering temperature, typically ranging from: Roller temperature: 50℃-70℃ If the temperature is too high, the rubber will soften excessively and stick to the rollers; if the temperature is too low, the rubber will be too elastic, the calendering resistance will increase, and problems such as rough rubber surface and uneven thickness will easily occur.

[0026] II. Calendering Temperature of Synthetic Rubber Sheets Different synthetic rubbers have significantly different molecular structures and properties, and their calendering temperature ranges also vary: Styrene-butadiene rubber (SBR) It has weaker polarity and a calendering temperature slightly higher than that of natural rubber. Roller temperature: 60℃-80℃ Butadiene rubber (BR) The material has high elasticity, requiring a slightly higher temperature to reduce elasticity and facilitate calendering. Roller temperature: 70℃-90℃ Chloroprene rubber (CR) Containing chlorine groups, these substances are highly polar, and the calendering temperature must be strictly controlled to prevent decomposition. Roller temperature: 50℃-70℃ (high temperature can easily lead to cross-linking or degradation) Nitrile butadiene rubber (NBR) Good oil resistance, strong intermolecular forces, and high calendering temperature: Roller temperature: 80℃-100℃.

[0027] The vertical electric actuator 3, speed-regulating motor 6, heating tube 8, heat-resistant fan 9, and temperature sensor 13 are all conventional instruments. Their working principles, dimensions, and models are irrelevant to the function of this application, so they will not be described in detail. The control method of this utility model is through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. In order to facilitate the inspection, maintenance, and parts replacement of the device, the parts inside a single device are usually from the same manufacturer and of the same model, function, and batch. Therefore, even if there is a certain difference between two or more electrical control devices, the synchronous movement of the electrical control devices can still be maintained under the action of the controller. The power supply is also common knowledge in the field. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail in this utility model. All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, welding, and bonding that are mature in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology.

[0028] Working principle The film calendering device, according to the material and temperature requirements of the film, pre-activates a specified number of heating tubes 8 and turns on the heat-resistant fan 9 to circulate the air, and obtains the temperature of each part of the heat preservation box 1 from the temperature sensor 13. According to the calendering requirements, adjust the vertical electric push rod 3 to change the distance between the movable pressure roller 5 and the two fixed pressure rollers 2, place the film, turn on the speed-regulating motor 6, the speed-regulating motor 6 drives the rotating shaft to rotate, which in turn drives the fixed pressure roller 2 and the movable pressure roller 5 to rotate, so as to realize the calendering operation of the film.

[0029] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A film calendering apparatus, characterized in that, include: Insulated box (1); Two fixed pressure rollers (2) are rotatably connected to the heat preservation box (1) via a rotating shaft; A vertical electric actuator (3) is embedded in the top of the insulation box (1). The moving part of the vertical electric actuator (3) is connected to a lifting lug (4). The inner wall of the lifting lug (4) is rotatably connected to a movable pressure roller (5). A speed-regulating motor (6) that provides power to the rotating shaft is installed on the outer periphery of the lifting lug (4) and the outer periphery of the insulation box (1). Two air tanks (7) are installed at the top and bottom of the insulation box (1), respectively. The inner wall of the air tank (7) is equipped with a heating pipe (8) and a heat-resistant fan (9). Both sides of the air tank (7) are connected to the insulation box (1) through multiple ventilation pipes (10).

2. The film calendering apparatus according to claim 1, characterized in that, The movable pressure roller (5) and the two fixed pressure rollers (2) are arranged in a triangular shape. The movable pressure roller (5) and the two fixed pressure rollers (2) cooperate to calender the film.

3. The film calendering apparatus according to claim 1, characterized in that, The rotation direction of the speed-regulating motor (6) of the movable pressure roller (5) is opposite to that of the speed-regulating motor (6) of the two fixed pressure rollers (2), and the speed of the three speed-regulating motors (6) is the same.

4. The film calendering apparatus according to claim 1, characterized in that, The top of the insulated box (1) is fitted with multiple limiting tubes (11), and the top of the lifting lug (4) is welded with a limiting rod (12) that is compatible with the limiting tubes (11).

5. The film calendering apparatus according to claim 1, characterized in that, Multiple temperature sensors (13) are installed on the inner wall of the air tank (7) and the inner wall of the insulation box (1). A maintenance plate (14) is rotatably connected to the side of the insulation box (1), and a viewing window is embedded in the side of the maintenance plate (14).

6. The film calendering apparatus according to claim 5, characterized in that, The heat preservation box (1) has material passages on both sides, and the inner wall of the material passages is rotatably connected to two parallel guide rollers (15) for guiding.

7. The film calendering apparatus according to claim 1, characterized in that, The inner wall of the insulated box (1) and the inner wall of the lifting lug (4) are both connected to a cleaning shovel (16), and the bottom of the insulated box (1) is provided with multiple support legs (17).

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