Sample fixing and forming equipment for production and processing of automobile cover film and use method of sample fixing and forming equipment

Abstract

The invention relates to the technical field of high polymer material processing machinery, and discloses sample fixing and forming equipment for car cover film production and processing and a using method thereof.The sample fixing and forming equipment comprises a rack, a cooling mechanism is arranged in the rack and comprises a cold water roller driven by a gear motor, and supporting rollers are arranged on the two sides of the cold water roller correspondingly; a rotating shaft in the middle of the supporting roller is fixedly connected with the two inner side walls of the rack correspondingly, a temperature adjusting anti-curling mechanism is arranged on the periphery of the cold water roller, the temperature adjusting anti-curling mechanism comprises a middle hot air absorbing assembly and an edge hot air blowing assembly, and size adjusting assemblies are arranged at the two ends of the cold water roller. By arranging the cooling mechanism, the temperature adjusting anti-curling mechanism and the size adjusting assembly, the cooling efficiency of the film material, the stability of the production quality and the applicability of the equipment are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of polymer material processing machinery technology, specifically to a sample forming equipment for producing and processing car wrap film and its usage method. Background Technology

[0002] In patent application CN117817915A, a housing is included. Holes are provided on both sides of the housing. A condenser is located inside the top of the housing, and a motor is located on one side of the bottom of the condenser. A control mechanism is located inside the housing, and the condenser is fixedly connected to the inner wall of the housing. The advantages are: This TPU film cooling device changes the position of the lifting plate by moving it up and down. If the lifting plate moves downwards, it prolongs the time the film spends inside the housing; if it moves upwards, it gradually brings the circular block's movement trajectory to a horizontal state, allowing the film to pass through the housing quickly. The position of the lifting plate can be changed by a vertical threaded rod, controlling the cooling time according to different needs, thus improving the overall applicability and making it more convenient to use.

[0003] In the production process of automotive wrap film, cooling and shaping are key steps that directly affect the flatness, dimensional stability, and surface quality of the film. Traditional cooling methods often employ passive cooling with water rollers or simple air cooling. While these methods can achieve basic temperature reduction, they still have several significant shortcomings in actual production.

[0004] In existing technologies, including those mentioned in the patents, the cooling process often lacks active control over the transverse temperature gradient of the membrane material. Because the edges of the membrane material have a large contact area with the air and dissipate heat quickly, while the center is in close contact with the cooling roller and has a larger heat capacity, the cooling rate of the membrane material is inconsistent along its width, with the edge area cooling significantly faster than the center. Uneven cooling can easily cause the film edge to shrink and curl, severely affecting the flatness and unfolding performance of the film, and even leading to quality defects such as creases and wrinkles during subsequent winding. Existing cooling devices are usually designed with a fixed structure, and the width of their suction, blowing, or cooling areas cannot be flexibly adjusted according to the actual film specifications produced. When facing the production needs of different widths of automotive wrap films, it is often necessary to stop the machine for mechanical adjustments or replacement of parts, which not only reduces production efficiency but also makes it difficult to ensure the consistency and accuracy of the edge cooling effect of different specifications of film materials, limiting the versatility of the equipment and the flexibility of the production line. Another common problem is that the film material and the surface of the cooling roller are not tightly adhered during the cooling process, which easily forms an air gap, reduces the heat transfer efficiency, and results in limited and uneven cooling speed. Although some equipment is equipped with auxiliary pressure rollers or air knives, they are often complex in structure and inconvenient to adjust, making it difficult to achieve a stable and uniform adhesion effect across the entire width, affecting the cooling and shaping quality and production capacity.

[0005] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0006] The problems to be solved by this invention are: uneven lateral temperature gradient during the cooling and shaping process of the membrane material, which leads to edge curling; fixed equipment structure that cannot flexibly adapt to different membrane widths; and poor adhesion between the membrane material and the cooling roller, which affects cooling efficiency and uniformity.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is: a sample forming equipment for car wrap film production and processing and its usage method, comprising a frame, wherein a cooling mechanism is provided inside the frame, the cooling mechanism includes a cold water roller driven by a geared motor, support rollers are respectively provided on both sides of the cold water roller, the rotating shaft in the middle of the support roller is fixedly connected to the two inner side walls of the frame, a temperature regulating anti-rolling mechanism is provided around the cold water roller, the temperature regulating anti-rolling mechanism includes a central heat absorption air assembly and an edge hot air blowing assembly, and size adjustment assemblies are provided at both ends of the cold water roller;

[0008] The central heat absorption air assembly includes a rotating rod and a telescopic suction hood. Axial flow fans are fixedly fitted on the outer surfaces of both ends of the rotating rod. A negative pressure box is provided outside the rotating rod, and the negative pressure box is connected to the telescopic suction hood. The edge hot air assembly includes two telescopic blowers, which are fixedly connected to the two inner side walls of the frame, respectively. The two ends of the negative pressure box are respectively connected to the two telescopic blowers.

[0009] Preferably, the geared motor is fixedly connected to the outer wall of the frame by bolts, the main body of the cold water roller is a metal roller with an internal cavity, the two ends of the cold water roller are respectively rotatably connected to the two side walls of the frame by a fixedly connected rotating shaft and a connecting cylinder, the output end of the geared motor is fixedly connected to one end of the rotating shaft by a coupling, the connecting cylinder is connected to the cold water roller, and the connecting cylinder is connected to the external cooling water circulation system by a double-channel rotary joint.

[0010] Preferably, the two ends of the negative pressure box are fixedly connected to the two inner side walls of the frame, and the two ends of the rotating rod are rotatably connected through the two ends of the negative pressure box. One end of the rotating rod is rotatably connected to the inner side wall of the frame, and the other end is rotatably connected through the other side wall of the frame. The two axial flow fans are configured to form an airflow from the middle to both ends in the negative pressure box when the rotating rod rotates. A filter screen that is rotatably connected through the rotating rod is installed near the middle of each of the two axial flow fans.

[0011] Preferably, a speed-increasing gear is installed on the outer wall of the frame, the input end of the speed-increasing gear is coaxially and fixedly connected to one end of the rotating shaft, and the output end of the speed-increasing gear is coaxially and fixedly connected to one end of the rotating rod.

[0012] Preferably, the telescopic suction hood includes an arc-shaped suction hood and two movable suction hoods. The two movable suction hoods are respectively inserted into both ends of the arc-shaped suction hood. The top of the arc-shaped suction hood is connected to the bottom of the negative pressure box. The bottom of both the arc-shaped suction hood and the movable suction hoods are provided with dense air inlet holes.

[0013] Preferably, the telescopic blower includes an arc-shaped blower and a movable blower. One end of the arc-shaped blower is fixedly connected to the side wall of the frame, and the movable blower is inserted into one end of the arc-shaped blower. The top of both the arc-shaped blower and the movable blower are provided with dense air outlet holes.

[0014] Preferably, the two side walls of the frame are provided with U-shaped grooves, the two ends of the negative pressure box are connected to air outlet pipes, the air outlet pipes are connected to the top of the U-shaped grooves, and one end of the arc-shaped blower hood is connected to the bottom of the U-shaped grooves through an air inlet pipe.

[0015] Preferably, the size adjustment assembly includes a motor-driven bidirectional lead screw and a rail fixedly connected to the top of the middle plate of the frame. Two moving blocks are slidably connected to the middle of the rail, and the two moving blocks are respectively threaded onto both ends of the bidirectional lead screw. The middle of the bidirectional lead screw is fixedly connected to the top of the middle plate of the frame through a fixing frame. One end of the bidirectional lead screw is rotatably connected to the side wall of the frame, and the other end rotatably passes through the other side wall of the frame and is fixedly connected to the output end of a motor installed on the side wall of the frame.

[0016] Preferably, the tops of the two movable blocks are fixedly connected to a circular ring by a connecting rod, the top of the circular ring is fixedly connected to the movable suction hood by a push rod two, and the bottom of the circular ring is fixedly connected to the movable blower hood by a push rod one.

[0017] Preferably, the method includes the following steps: S1: Based on the width of the car wrap film to be produced, start the drive motor of the size adjustment component, drive the bidirectional lead screw to rotate, so that the two moving blocks move towards or away from each other along the track. Then, through the linkage of the circular ring and push rod one and push rod two, the extension length of the upper moving suction hood and the lower moving blowing hood are adjusted synchronously, so that the effective width of the suction and blowing area is precisely matched with the film width. S2: The car wrap film is drawn out from the upstream process and passed through and tensioned sequentially from the top of the first support roller, the bottom of the cold water roller, and the top of the second support roller; S3: The geared motor is started to drive the cooling water roller to rotate at a constant speed, propelling the membrane material forward continuously; at the same time, the external cooling water circulation system is activated, allowing cooling water to circulate through the dual-channel rotary joint in the internal cavity of the cooling water roller, actively cooling the membrane material. The rotation of the cooling water roller is driven by a speed-increasing gear to rotate the rotating rod and axial fan at high speed, forming an airflow from the center to both ends within the negative pressure box; S4: The negative pressure generated by the axial fan actively draws the residual heat emitted from the middle area of ​​the film material on the surface of the cold water roller into the middle of the negative pressure box through the air inlet hole at the bottom of the telescopic suction hood; the hot air is then driven by the airflow and transported to the telescopic blowing hoods on both sides through the air outlet pipe, the U-shaped groove and the air inlet pipe, and blown out from the air outlet hole at the top of them, precisely acting on the two sides of the film material for heat compensation.

[0018] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) By setting up a cooling mechanism, a temperature regulation and anti-rolling mechanism and a size adjustment component, the present invention significantly improves the cooling efficiency of the membrane material and the stability of production quality and equipment applicability. A smart temperature control compensation system is constructed through the synergistic action of the central heat absorption air assembly, the edge blowing heat air assembly, and the cooling water roller. While the cooling water roller actively cools the membrane material, the rotating rod drives the axial flow fan to form a stable airflow from the center to both ends within the negative pressure box. This airflow actively extracts residual heat from the central area of ​​the membrane material through the air inlet holes at the bottom of the telescopic suction hood. The extracted hot air is precisely guided to the telescopic blowing hoods on both sides through the air outlet pipe, the U-shaped groove, and the air inlet pipe, and blown towards the edge of the membrane material from the air outlet holes at the top. This "central suction and edge blowing" heat redistribution mechanism effectively balances the cooling gradient of the membrane material in the width direction, fundamentally preventing curling caused by excessively rapid cooling at the edges. At the same time, the top suction and bottom blowing create a slight directional airflow pressure difference on the upper and lower surfaces of the membrane material. This pressure difference causes the membrane material to adhere more tightly and stably to the cooling surface of the cooling water roller, significantly reducing air gaps and membrane material vibration, and further improving the uniformity of cooling contact and shaping quality.

[0019] (2) The bidirectional lead screw in the size adjustment assembly rotates under the drive of the motor, driving two moving blocks to move synchronously towards or away from each other along the track, thereby driving the circular ring to move. The moving air blower hood below and the moving air suction hood above are synchronously extended and retracted through the linkage of push rod one and push rod two respectively. This linkage mechanism ensures that the suction area and the blowing area can be precisely adjusted steplessly, synchronously, and coaxially according to the width of the membrane material, so that the temperature compensation range is always completely matched with the effective width of the membrane material. The speed-increasing gear transmits the rotation of the cold water roller to the rotating rod through the rotating shaft, so that the speed of the axial flow fan and the speed of the production line (i.e., the speed of the cold water roller) are automatically kept in a fixed ratio, so that the strength of the air force is always matched with the cooling demand in real time. The cooperation of each component makes it possible to change the production specifications without manual intervention of the air system parameters, realizing the intelligent operation mode of "one-time setting, automatic following", which greatly improves production efficiency and process stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall left side of the invention; Figure 2 This is a schematic diagram of the overall structure on the right side of the invention; Figure 3 This is a schematic diagram of the overall internal structure of the present invention; Figure 4 This is a cross-sectional structural diagram of the negative pressure box of the present invention; Figure 5 This is a side view of the temperature regulation anti-rolling mechanism and the cooling water roller of the present invention. Figure 6 This is a schematic diagram of the size adjustment mechanism of the present invention; Figure 7 This is a schematic cross-sectional view of the telescopic suction hood and telescopic blowing hood of the present invention; Figure 8 This is a schematic cross-sectional view of the spiral groove of the present invention; Figure 9 This is a schematic cross-sectional view of the air outlet duct and air inlet duct of the present invention.

[0021] In the diagram: 1. Frame; 2. Cooling water roller; 201. Rotating shaft; 202. Connecting cylinder; 203. Gear motor; 204. Rotary joint; 205. Speed-increasing gear; 3. Support roller; 4. Rotating rod; 401. Axial flow fan; 402. Filter screen; 403. Negative pressure box; 404. Air outlet pipe; 5. Arc-shaped suction hood; 501. Moving suction hood; 6. Arc-shaped blowing hood; 601. Moving blowing hood; 602. Air inlet pipe; 603. U-shaped groove; 7. Circular ring; 701. Connecting rod; 702. Push rod one; 703. Push rod two; 704. Track; 705. Moving block; 706. Bidirectional lead screw; 707. Fixed frame. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0023] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0024] like Figures 1 to 9 As shown, the present invention provides a molding equipment and its method for producing and processing car wrap film. The equipment includes a frame 1, with a cooling mechanism inside the frame 1. This cooling mechanism serves as the core heat exchange unit for molding. The cooling mechanism includes a cold water roller 2 driven by a geared motor 203. Cooling water circulating inside the cold water roller 2 continuously removes heat from the car wrap film in contact with it. Support rollers 3 are respectively provided on both sides of the cold water roller 2. The rotating shaft in the middle of the support roller 3 is fixedly connected to the two inner side walls of the frame 1. The outer roller body of the support roller 3 can rotate around the central rotating shaft 201. The car wrap film passes through the top of the first support roller 3, then through the bottom of the cold water roller 2, and finally through the top of the second support roller 3, and is fixedly connected to the winding roller of the external winding mechanism. The two support rollers 3 serve to tension and guide the film material, ensuring full and smooth contact between the car wrap film and the lower half of the surface of the cold water roller 2. A temperature-regulating anti-curling mechanism is provided around the cold water roller 2. The temperature regulation and anti-curling mechanism includes a central heat-absorbing air assembly and an edge-blowing hot air assembly. When the film passes the bottom of the cold water roller 2, the outer surface of the cold water roller 2 absorbs the heat from the film, and most of the heat is carried away by the cold water inside the cold water roller 2. A small amount of heat is dissipated by contact with the air on the surface of the cold water roller 2. The central heat-absorbing air assembly can absorb the heat absorbed by the film in the middle of the cold water roller 2 in a timely manner and blow it to the two sides of the film through the edge-blowing hot air assembly. This can accelerate the cooling of the surface of the central cold water roller 2, thereby accelerating the heat dissipation and cooling of the film in the middle, and can also provide thermal compensation for the film that dissipates heat quickly on the sides, thereby keeping the cooling speed of the entire film consistent and preventing the film from curling due to excessive cooling on the sides, which would affect the quality of film production. Size adjustment assemblies are provided at both ends of the cold water roller 2. The size adjustment assemblies can flexibly adjust the range of action of the heat-absorbing air assembly and the edge-blowing hot air assembly, and make reasonable and flexible adjustments according to the film of different widths to meet the needs of different film sizes. The central heat absorption air assembly includes a rotating rod 4 and a telescopic suction hood. Axial flow fans 401 are fixedly sleeved on the outer surfaces of both ends of the rotating rod 4. A negative pressure box 403 is provided outside the rotating rod 4. The negative pressure box 403 is connected to the telescopic suction hood. The rotation of the rotating rod 4 drives the two axial flow fans 401 to rotate synchronously, thereby forming a negative pressure in the negative pressure box 403 and the telescopic suction hood, which absorbs the heat from the surface of the cold water roller 2. The edge blowing hot air assembly includes two telescopic blowing hoods, which are fixedly connected to the two inner side walls of the frame 1 respectively. The two ends of the negative pressure box 403 are connected to the two telescopic blowing hoods respectively. The heat in the negative pressure box 403 is blown to the two telescopic blowing hoods, and then blown to the two sides of the membrane for heat compensation.

[0025] In one embodiment of the present invention, the geared motor 203 is fixedly connected to the outer wall of the frame 1 by bolts. The main body of the cold water roller 2 is a metal roller with an internal cavity. The two ends of the cold water roller 2 are rotatably connected to the two side walls of the frame 1 by a fixedly connected rotating shaft 201 and a connecting cylinder 202, respectively. The output end of the geared motor 203 is fixedly connected to one end of the rotating shaft 201 by a coupling. The output end of the geared motor 203 can drive the cold water roller 2 to rotate at a uniform speed. The rotating shaft 201 and the connecting cylinder 202 ensure the coaxiality and smooth operation of the cold water roller 2 under high-speed rotation. The connecting cylinder 202 is connected to the cold water roller 2 and is connected to the external cooling water circulation system through a double-channel rotary joint 204. The double-channel rotary joint 204 is a mature component of the prior art. It is designed with mutually isolated water inlet channels and water return channels, and relies on a precise mechanical seal to fix the rotating parts to the connecting cylinder 202 and the stationary parts to the external pipeline, thereby achieving leak-free connection. The low-temperature cooling water from the external cooling water circulation system is continuously pumped into the cavity inside the cooling water roller 2 through the water inlet channel of the rotary joint 204 and the connecting cylinder 202. After absorbing the heat transferred from the surface of the car cover film by the cooling water roller 2, it becomes higher-temperature return water and then returns to the external system for cooling through the return water channel of the connecting cylinder 202 and the rotary joint 204. This forms a closed and efficient forced convection cooling circuit, ensuring that the cooling water can carry out uninterrupted heat exchange circulation while the cooling water roller 2 is rotating, thus achieving continuous and efficient cooling of the car cover film.

[0026] In one embodiment of the present invention, the two ends of the negative pressure box 403 are fixedly connected to the two inner side walls of the frame 1, respectively. The two ends of the rotating rod 4 are rotatably connected to the two ends of the negative pressure box 403. One end of the rotating rod 4 is rotatably connected to the inner side wall of the frame 1, and the other end is rotatably connected to the other side wall of the frame 1. The two axial flow fans 401 are configured to form an airflow from the middle to both ends in the negative pressure box 403 when the rotating rod 4 rotates. The air inside the negative pressure box 403 can be quickly drawn into the two telescopic blowers at both ends. The two axial flow fans 401 are equipped with filter screens 402 that are rotatably penetrated by the rotating rod 4 near the middle. The filter screens 402 are made of stainless steel mesh with a mesh size of 100-200 mesh. The filter screens 402 can intercept the dust in the air drawn in through the telescopic blowers, preventing the dust from being blown to the sides of the bottom of the membrane again, which would cause the membrane to be dented and defective after winding due to the dust being squeezed.

[0027] In one embodiment of the present invention, a speed-increasing gear 205 is installed on the outer wall of the frame 1. The input end of the speed-increasing gear 205 is coaxially and fixedly connected to one end of the rotating shaft 201, and the output end of the speed-increasing gear 205 is coaxially and fixedly connected to one end of the rotating rod 4. The cooling water roller 2, as the main cooling body, needs to rotate at a relatively stable medium-low speed to ensure smooth conveying of the film material and sufficient heat exchange. The axial fan 401 needs a higher speed to generate a sufficiently strong airflow to form effective negative pressure suction and airflow conveying. The speed-increasing gear 205, through its transmission ratio greater than 1, proportionally amplifies the lower speed from the rotating shaft 201 and transmits it to the rotating rod 4. This drives the axial fan 401 to rotate at a speed much higher than that of the cooling roller 2. The speed of the axial fan 401 and the speed of the cooling roller 2 are connected by the speed-increasing gear 205, and there is a fixed speed ratio between them. So when the production line is fast, the cooling roller 2 rotates fast, and the axial fan 401 naturally rotates faster and the airflow is stronger. When the production line is slow, the axial fan 401 will also weaken synchronously. In this way, there is no need to manually adjust the axial fan 401. The system can adjust the airflow according to the production rhythm, ensuring the stability of the cooling effect and the anti-rolling function, and realizing the automatic matching of airflow and production line speed.

[0028] As one embodiment of the present invention, the telescopic suction hood includes an arc-shaped suction hood 5 and two movable suction hoods 501. The two movable suction hoods 501 are respectively inserted into both ends of the arc-shaped suction hood 5, so that the movable suction hoods 501 can slide smoothly along the width direction of the membrane material, thereby changing the effective coverage length of the telescopic suction hood according to the membrane material of different widths. The top of the arc-shaped suction hood 5 is connected to the bottom of the negative pressure box 403. The bottom of both the arc-shaped suction hood 5 and the movable suction hoods 501 are provided with dense air inlet holes. These air inlet holes are directly facing the surface area of ​​the cold water roller 2 after contact and heat exchange with the membrane material, and are used to directly capture and guide the hot air emitted from this area.

[0029] In one embodiment of the present invention, the telescopic blower includes an arc-shaped blower 6 and a movable blower 601. One end of the arc-shaped blower 6 is fixedly connected to the side wall of the frame 1, and the movable blower 601 is inserted into one end of the arc-shaped blower 6, allowing the movable blower 601 to slide smoothly along the width direction of the membrane material. This allows the effective coverage length of the telescopic blower to be changed according to the different widths of the membrane material. The tops of both the arc-shaped blower 6 and the movable blower 601 are provided with dense air outlet holes. These air outlet holes face the surface areas of the membrane material that contact the cooling water roller 2 on both sides, and are used to directly blow the captured hot air towards the cooling water roller 2 to the two sides of the membrane. Through the simultaneous action of top negative pressure heat absorption and bottom air blowing compensation, a slight airflow pressure field is formed in the thickness direction of the membrane material. This pressure field helps to more stably "press" the membrane material onto the cooling surface of the lower half of the cooling water roller 2, reducing uneven heat exchange caused by air gaps or membrane vibration, and improving the stability of the overall cooling efficiency.

[0030] In one embodiment of the present invention, the two side walls of the frame 1 are provided with U-shaped grooves 603, and the two ends of the negative pressure box 403 are connected to the air outlet pipes 404. The air outlet pipes 404 are connected to the top of the U-shaped grooves 603, and one end of the arc-shaped blower hood 6 is connected to the bottom of the U-shaped grooves 603 through the air inlet pipe 602, so that the hot air in the negative pressure box 403 can enter the U-shaped grooves 603 through the air outlet pipes 404, and then enter the arc-shaped blower hood 6 through the air inlet pipes 602 and be blown out.

[0031] In one embodiment of the present invention, the size adjustment assembly includes a motor-driven bidirectional lead screw 706 and a track 704 fixedly connected to the top of the middle plate of the frame 1. Two moving blocks 705 are slidably connected to the middle of the track 704. The two moving blocks 705 are threaded onto both ends of the bidirectional lead screw 706. The middle of the bidirectional lead screw 706 is fixedly connected to the top of the middle plate of the frame 1 via a fixing bracket 707. One end of the bidirectional lead screw 706 is rotatably connected to the side wall of the frame 1, and the other end rotatably passes through another side wall of the frame 1 and is fixedly connected to the output end of a motor installed on the side wall of the frame 1. A circular ring 7 is fixedly connected to the top of the two moving blocks 705 via a connecting rod 701. The top of the circular ring 7 is connected to a push rod via a push rod. Rod 2 703 is fixedly connected to the movable suction hood 501, and the bottom end of the circular ring 7 is fixedly connected to the movable blowing hood 601 via push rod 1 702. When adjustment is needed to accommodate different membrane widths, the control motor is started, and the rotation of the bidirectional lead screw 706 drives the two moving blocks 705 to move towards or away from each other along the track 704, causing the two circular rings 7 to move synchronously towards or away from each other. Then, through the transmission of push rod 1 702 and push rod 2 703, the two upper movable suction hoods 501 and the two lower movable blowing hoods 601 immediately produce completely synchronous and equidistant telescopic movements, ensuring that the working width of the central heat absorption area and the edge heat blowing area always remains consistent and aligned with the center line, and can be steplessly and precisely adjusted according to instructions. This allows the "heat redistribution" function of the present invention to be precisely applied to the effective width of the membrane material of any width.

[0032] S1: Based on the width of the car wrap film to be produced, start the drive motor of the size adjustment component, drive the bidirectional lead screw 706 to rotate, so that the two moving blocks 705 move towards or away from each other along the track 704, and then through the linkage of the circular ring 7 and push rod 1 702 and push rod 2 703, synchronously adjust the extension length of the upper moving suction hood 501 and the lower moving blowing hood 601, so that the effective width of the suction and blowing area is precisely matched with the film width. S2: The car wrap film is drawn out from the upstream process and passed through and tensioned sequentially from the top of the first support roller 3, the bottom of the cold water roller 2, and the top of the second support roller 3; S3: Start the geared motor 203 to drive the cooling water roller 2 to rotate at a constant speed, driving the membrane material forward continuously; at the same time, start the external cooling water circulation system, so that the cooling water circulates in the internal cavity of the cooling water roller 2 through the dual-channel rotary joint 204 to actively cool the membrane material. The rotation of the cooling water roller 2 drives the rotating rod 4 and the axial flow fan 401 to rotate at high speed through the speed-increasing gear 205, forming an airflow from the middle to both ends in the negative pressure box 403; S4: The negative pressure generated by the axial fan 401 actively draws the residual heat emitted from the central area of ​​the membrane material on the surface of the cold water roller 2 into the center of the negative pressure box 403 through the air inlet holes at the bottom of the telescopic suction hood. This hot air is then driven by the airflow and transported through the air outlet 404, the U-shaped groove 603, and the air inlet 602 to the telescopic blowing hoods on both sides, and blown out from the air outlet holes at the top, precisely acting on the two edges of the membrane material for heat compensation. The working principle and usage process of this invention are as follows: Connect the external power supply and cooling water circulation system. Based on the width of the film to be produced, start the drive motor of the size adjustment component via the control panel. The motor drives the bidirectional lead screw 706 to rotate, causing the two moving blocks 705 to move along the track 704. Through the linkage of the circular ring 7 and push rods 1 and 2, the extension lengths of the upper moving suction hood 501 and the lower moving blowing hood 601 are adjusted synchronously, ensuring that the effective width of the suction and blowing areas precisely matches the film width. The film is drawn from the upstream process and passes sequentially through the top of the first support roller 3, the bottom of the cold water roller 2, and the top of the second support roller 3, finally being fixed to the external take-up roller. The support roller 3 ensures that the film is taut and flatly attached to the lower half of the cooling surface of the cold water roller 2. The geared motor 203 is started to drive the cold water roller 2 to rotate at a constant speed, moving the film forward continuously. At the same time, the external cooling water circulation system is activated, and low-temperature cooling water is continuously pumped into the cavity inside the cold water roller 2 through the dual-channel rotary joint 204 and the connecting cylinder 202. When the film comes into contact with the cooling surface of the cold water roller 2, its heat is absorbed by the roller body and quickly carried away by the internal flowing cooling water. After heat exchange, the heated cooling water returns to the external system for cooling through the return water channel of the rotary joint 204, forming a closed active cooling loop.

[0033] As the cooling water roller 2 rotates, its shaft 201 transmits power to the rotating rod 4 through the speed-increasing gear 205, significantly increasing its rotational speed. The high-speed rotating rod 4 drives the axial flow fans 401 at both ends to work. The two axial flow fans 401 together form an airflow that flows rapidly from the middle to both ends within the negative pressure box 403, thereby generating a stable negative pressure inside the negative pressure box 403 and the telescopic suction hoods (including the arc-shaped suction hood 5 and the movable suction hood 501) connected to it. Central heat absorption: The aforementioned negative pressure actively and efficiently draws up the residual heat (i.e. the part that is not immediately carried away by the cooling water) emitted from the central area of ​​the membrane material on the surface of the cooling water roller 2 through the dense air inlet holes at the bottom of the suction hood. The drawn-in hot air is purified by the filter screen 402 and enters the central part of the negative pressure box 403. This process accelerates the cooling speed of the central part of the membrane material.

[0034] Edge heat compensation: The hot air drawn into the negative pressure box 403 is driven by the axial fan 401 to flow to both ends of the negative pressure box 403. It enters the U-shaped groove 603 inside the side wall of the frame 1 through the air outlet duct 404, and is then distributed to the telescopic air blowing hoods on both sides (including the arc-shaped air blowing hood 6 and the movable air blowing hood 601) through the air inlet duct 602. The hot air is finally blown out from the dense air outlet holes at the top of the air blowing hood, which precisely acts on the areas where the edges of the membrane material come into contact with the cold water roller 2, providing targeted heat compensation for the edges of the membrane material that cool faster.

[0035] This "middle suction and edge blowing" process redistributes heat in the transverse (width) direction of the membrane material, effectively balancing the cooling gradient of the entire membrane and fundamentally preventing edge curling. At the same time, the top suction and bottom blowing create a slight airflow pressure difference between the upper and lower parts of the membrane material, which helps the membrane material adhere more stably to the surface of the cooling roller 2 and improves cooling uniformity.

[0036] Throughout the production process, the mechanical linkage of the speed-increasing gear 205 ensures that the rotational speed of the axial fan 401 is automatically matched with the production line speed (cooling water roller speed). The wind force increases or decreases synchronously with the increase or decrease of the line speed. Without manual intervention, the device runs continuously to complete the uniform and efficient cooling and shaping of the car wrap film.

[0037] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A sample forming equipment for producing and processing car wrap film, comprising a frame (1), characterized in that: The frame (1) is equipped with a cooling mechanism, which includes a cold water roller (2) driven by a geared motor (203). Support rollers (3) are provided on both sides of the cold water roller (2). The rotating shaft in the middle of the support roller (3) is fixedly connected to the two inner side walls of the frame (1). A temperature regulating anti-rolling mechanism is provided around the cold water roller (2). The temperature regulating anti-rolling mechanism includes a central heat-absorbing air assembly and an edge-blowing heat-blowing air assembly. Size adjustment assemblies are provided at both ends of the cold water roller (2). The central heat absorption air assembly includes a rotating rod (4) and a telescopic suction hood. An axial flow fan (401) is fixedly sleeved on the outer surface of both ends of the rotating rod (4). A negative pressure box (403) is provided outside the rotating rod (4), and the negative pressure box (403) is connected to the telescopic suction hood. The edge hot air assembly includes two telescopic blowers, which are fixedly connected to the two inner side walls of the frame (1) respectively, and the two ends of the negative pressure box (403) are connected to the two telescopic blowers respectively.

2. The sample forming equipment for car wrap film production and processing according to claim 1, characterized in that: The geared motor (203) is fixedly connected to the outer wall of the frame (1) by bolts. The main body of the cold water roller (2) is a metal roller with an internal cavity. The two ends of the cold water roller (2) are rotatably connected to the two side walls of the frame (1) by a fixedly connected rotating shaft (201) and a connecting cylinder (202). The output end of the geared motor (203) is fixedly connected to one end of the rotating shaft (201) by a coupling. The connecting cylinder (202) is connected to the cold water roller (2). The connecting cylinder (202) is connected to the external cooling water circulation system by a double-channel rotary joint (204).

3. The sample forming equipment for car wrap film production and processing according to claim 1, characterized in that: The two ends of the negative pressure box (403) are fixedly connected to the two inner side walls of the frame (1), and the two ends of the rotating rod (4) are rotatably passed through the two ends of the negative pressure box (403). One end of the rotating rod (4) is rotatably connected to the inner side wall of the frame (1), and the other end is rotatably passed through the other side wall of the frame (1). The two axial flow fans (401) are configured to form an airflow from the middle to both ends in the negative pressure box (403) when the rotating rod (4) rotates. The two axial flow fans (401) are equipped with filter screens (402) that are rotatably passed through by the rotating rod (4) near the middle.

4. The sample forming equipment for car wrap film production and processing according to claim 1, characterized in that: A speed-increasing gear (205) is installed on the outer wall of the frame (1). The input end of the speed-increasing gear (205) is coaxially and fixedly connected to one end of the rotating shaft (201), and the output end of the speed-increasing gear (205) is coaxially and fixedly connected to one end of the rotating rod (4).

5. The sample forming equipment for car wrap film production and processing according to claim 1, characterized in that: The telescopic suction hood includes an arc-shaped suction hood (5) and two movable suction hoods (501). The two movable suction hoods (501) are respectively inserted into both ends of the arc-shaped suction hood (5). The top of the arc-shaped suction hood (5) is connected to the bottom of the negative pressure box (403). The bottom of both the arc-shaped suction hood (5) and the movable suction hoods (501) are provided with dense air inlet holes.

6. The sample forming equipment for car wrap film production and processing according to claim 1, characterized in that: The telescopic blower includes an arc-shaped blower (6) and a movable blower (601). One end of the arc-shaped blower (6) is fixedly connected to the side wall of the frame (1). The movable blower (601) is inserted into one end of the arc-shaped blower (6). The top of both the arc-shaped blower (6) and the movable blower (601) are provided with dense air outlet holes.

7. The sample forming equipment for car wrap film production and processing according to claim 6, characterized in that: The frame (1) has a spiral groove (603) inside both side walls. Both ends of the negative pressure box (403) are connected to an air outlet pipe (404). The air outlet pipe (404) is connected to the top of the spiral groove (603). One end of the arc-shaped blower hood (6) is connected to the bottom of the spiral groove (603) through an air inlet pipe (602).

8. The sample forming equipment for car wrap film production and processing according to claim 1, characterized in that: The size adjustment assembly includes a motor-driven bidirectional lead screw (706) and a track (704) fixedly connected to the top of the middle plate of the frame (1). Two moving blocks (705) are slidably connected to the middle of the track (704). The two moving blocks (705) are respectively threaded onto both ends of the bidirectional lead screw (706). The middle of the bidirectional lead screw (706) is fixedly connected to the top of the middle plate of the frame (1) through a fixing bracket (707). One end of the bidirectional lead screw (706) is rotatably connected to the side wall of the frame (1), and the other end rotatably passes through the other side wall of the frame (1) and is fixedly connected to the output end of the motor installed on the side wall of the frame (1).

9. The sample forming equipment for car wrap film production and processing according to claim 8, characterized in that: The tops of the two movable blocks (705) are fixedly connected to a circular ring (7) by a connecting rod (701). The top of the circular ring (7) is fixedly connected to the movable suction hood (501) by a push rod two (703), and the bottom of the circular ring (7) is fixedly connected to the movable blower hood (601) by a push rod one (702).

10. The method of using the sample forming equipment for car wrap film production and processing according to claim 1, applicable to the sample forming equipment for car wrap film production and processing according to any one of claims 1-9, characterized in that: The method includes the following steps: S1: Based on the width of the car wrap film to be produced, start the drive motor of the size adjustment component, drive the bidirectional lead screw (706) to rotate, so that the two moving blocks (705) move towards or away from each other along the track (704), and then through the linkage of the circular ring (7) and push rod one (702) and push rod two (703), synchronously adjust the extension length of the upper moving suction hood (501) and the lower moving blowing hood (601), so that the effective width of the suction and blowing area is precisely matched with the film width; S2: The car wrap film is drawn out from the upstream process and passed through and tensioned sequentially from the top of the first support roller (3), the bottom of the cold water roller (2), and the top of the second support roller (3); S3: Start the geared motor (203) to drive the cooling water roller (2) to rotate at a constant speed, driving the membrane material to move forward continuously; at the same time, start the external cooling water circulation system, so that the cooling water circulates in the internal cavity of the cooling water roller (2) through the double-channel rotary joint (204) to actively cool the membrane material. The rotation of the cooling water roller (2) drives the rotating rod (4) and the axial flow fan (401) to rotate at high speed through the speed-increasing gear (205), forming an airflow from the middle to both ends in the negative pressure box (403); S4: The negative pressure generated by the axial fan (401) actively draws the residual heat emitted from the middle area of ​​the film material on the surface of the cold water roller (2) to the middle of the negative pressure box (403) through the air inlet hole at the bottom of the telescopic suction hood; the hot air is then driven by the airflow and transported to the telescopic blowing hoods on both sides through the air outlet pipe (404), the U-shaped groove (603) and the air inlet pipe (602), and blown out from the air outlet hole at the top of the hood, which precisely acts on the two sides of the film material to compensate for the heat.

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