A coating machine for uniform coating

Abstract

This utility model relates to the technical field of coating machine equipment and discloses a coating machine for uniform coating, including a platform, a connecting plate, a coating assembly, an adsorption assembly, and a moving assembly. This utility model achieves localized adjustment of the flow channel resistance by adjusting the insertion depth of the resistance block within the damping cavity, thereby precisely controlling the flow and pressure distribution at various lateral positions of the die head. This effectively compensates for the problem of excessively high intermediate pressure caused by differences in fluid characteristics, ensuring the uniformity of the extrusion process. Furthermore, precise temperature control of the heating block is achieved through a heating wire, utilizing the thermal expansion and contraction characteristics of metal materials to achieve micron-level adjustment of the local die lip opening. This dual adjustment mechanism not only achieves precise control of the extrusion pressure but also dynamically compensates for the die lip gap, significantly improving the dimensional accuracy and surface quality of the product, providing a reliable guarantee for the stable production of high-quality products.

Description

Technical Field

[0001] This utility model relates to the technical field of coating machine equipment, specifically a coating machine for uniform coating. Background Technology

[0002] Coating technology is a key process that uniformly coats molten plastic film onto the surface of a substrate (such as paper, non-woven fabric, plastic film, etc.), and is widely used in food packaging, medical protective equipment, industrial composite materials, and other fields. The core quality of coated products lies in the uniformity of the coating, the consistency of its thickness, and the absence of defects in its surface quality.

[0003] Currently, traditional coating machines still face challenges in achieving high-quality coating, particularly in the die head system. Due to the inherent "throttling effect" of polymer melt flowing within the flow channel, the pressure and flow rate are typically higher in the middle of the die head's transverse width, while the pressure and flow rate are lower on both sides. This uneven distribution of pressure and flow directly results in uneven extruded film thickness, with the middle being thicker and the sides thinner, severely affecting the product's flatness and physical properties. Although existing technologies allow for mechanical fine-tuning via die lip adjustment bolts, this method is slow to respond, has limited precision, and cannot compensate for dynamic changes during the production process in real time. Therefore, a coating machine for uniform coating is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a coating machine that produces uniform coating, which solves the technical problem of uneven thickness of the extruded film caused by traditional devices, and achieves the goal of significantly improving the dimensional accuracy and surface quality of the product.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a uniform coating machine, comprising a platform, a connecting plate, a coating assembly, an adsorption assembly, and a moving assembly. The connecting plate is disposed at the rear end of the platform, the coating assembly is disposed on the moving assembly, the adsorption assembly is disposed in the middle of the platform, and the moving assembly is disposed on the connecting plate. The coating assembly includes a mounting plate, which is disposed at the upper end of the platform. First electric telescopic rods are fixedly connected to both sides of the lower surface of the mounting plate. A mounting frame is fixedly connected to the output end of the first electric telescopic rods. A connecting block is fixedly connected to the middle of the lower surface of the mounting frame. A flow-diverting cavity, a damping cavity, and a pressure-stabilizing cavity are respectively opened inside the connecting block from top to bottom. A die lip is fixedly connected to the lower surface of the connecting block, and the connecting block communicates with the die lip. Multiple resistance blocks are disposed in the middle of one side of the connecting block. Multiple heating blocks are fixedly connected to one side of the lower surface of the die lip, and multiple heating wires are disposed inside each heating block. A liquid storage tank is disposed in the middle of the upper surface of the mounting frame.

[0006] Preferably, a second electric telescopic rod is provided near the middle of the front and rear ends of the mounting plate. The output end of the second electric telescopic rod is fixedly connected to a squeezing plate. A discharge port is opened in the middle of the lower surface of the liquid storage tank. The lower end of the discharge port extends through the inner wall of the connecting block. The squeezing plate is moved by the second electric telescopic rod, so that the melt can be squeezed out from the discharge port.

[0007] Preferably, the adsorption assembly includes an adsorption chamber located in the middle of the platform. The middle of the upper surface of the platform has multiple adsorption holes, through which the substrate can be fixed.

[0008] Preferably, a first connecting frame is fixedly connected to the middle of the lower surface of the platform, and an air suction pump is fixedly connected to the inner bottom surface of the first connecting frame. The air suction end of the air suction pump passes through a pipe into the adsorption chamber. The air suction pump can generate negative pressure, and the air suction end of the air suction pump passing through the pipe into the adsorption chamber can create a negative pressure environment inside the adsorption chamber.

[0009] Preferably, the moving component includes a mounting block, which is fixedly connected to the upper end of the front outer wall of the connecting plate. A sliding groove is provided in the middle of the front outer wall of the mounting block, and a servo motor is fixedly connected to the middle of one side outer wall of the mounting block. The servo motor can drive the threaded rod to rotate.

[0010] Preferably, the output end of the servo motor is fixedly connected to a threaded rod, the side of the threaded rod away from the servo motor is rotatably connected to the mounting block, a threaded sleeve is fitted on the outer wall of one side of the threaded rod, and the front end of the outer wall of the threaded sleeve is fixedly connected to the mounting plate. The fixed connection between the threaded sleeve and the mounting plate can drive the mounting plate to move.

[0011] Preferably, a second connecting frame is connected to the front end of the upper surface of the platform, and a limiting groove is formed at the upper end of the outer wall of the rear end of the second connecting frame. The front end of the mounting plate slides inside the limiting groove. The stability of the mounting plate when moving can be improved by the second connecting frame and the limiting groove.

[0012] Preferably, a control panel is fixedly connected to the upper end of one side of the front outer wall of the second connecting frame. The first electric telescopic rod, heating wire, second electric telescopic rod, air pump and servo motor are all electrically connected to the control panel. The control panel facilitates operation by the staff, and the electrical connection facilitates signal transmission and reception.

[0013] This utility model provides a coating machine for uniform coating, which has the following beneficial effects:

[0014] (1) By adjusting the insertion depth of the resistance block in the damping cavity, this utility model can achieve local adjustment of the flow channel resistance, thereby accurately controlling the flow pressure distribution at each position of the die head in the lateral direction, effectively compensating for the problem of high intermediate pressure caused by the difference in fluid characteristics, ensuring the uniformity of the extrusion process. On this basis, the heating block is precisely controlled by the heating wire, and the micron-level adjustment of the local opening of the die lip is achieved by utilizing the thermal expansion and contraction characteristics of the metal material. Through the dual adjustment mechanism, not only is the precise control of the extrusion pressure achieved, but the die lip gap can also be dynamically compensated, significantly improving the dimensional accuracy and surface quality of the product, and providing a reliable guarantee for the stable production of high-quality products.

[0015] (2) This utility model forms a stable negative pressure environment inside the adsorption chamber by using an air pump. Then, the substrate is uniformly and firmly adsorbed onto the surface of the platform by an adsorption pore array. This not only ensures a tight fit between the substrate and the platform, but also effectively eliminates material vibration and local lifting that may occur in key areas during the coating process. This provides a stable and vibration-free processing base for subsequent coating processes, significantly improving the precision of the coating process and the quality of the finished product. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram: 1. Platform; 2. Connecting plate; 3. Coating assembly; 31. Mounting plate; 32. First electric telescopic rod; 33. Mounting frame; 34. Connecting block; 35. Diverting chamber; 36. Damping chamber; 37. Pressure stabilizing chamber; 38. Die lip; 39. Resistance block; 310. Heating block; 311. Heating wire; 312. Liquid storage tank; 313. Second electric telescopic rod; 314. Extrusion plate; 315. Discharge port; 4. Adsorption assembly; 41. Adsorption chamber; 42. Adsorption hole; 43. First connecting frame; 44. Suction pump; 5. Moving assembly; 51. Mounting block; 52. Slide groove; 53. Servo motor; 54. Threaded rod; 55. Threaded sleeve; 6. Second connecting frame; 7. Limiting groove; 8. Control panel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] Example 1: A preferred embodiment of the coating machine for uniform coating provided by this utility model. Figure 1-4 As shown, a uniform coating machine includes a platform 1, a connecting plate 2, a coating assembly 3, an adsorption assembly 4, and a moving assembly 5. The connecting plate 2 is located at the rear end of the platform 1, the coating assembly 3 is mounted on the moving assembly 5, the adsorption assembly 4 is located in the middle of the platform 1, and the moving assembly 5 is mounted on the connecting plate 2. The coating assembly 3 includes a mounting plate 31, which is located at the upper end of the platform 1. First electric telescopic rods 32 are fixedly connected to both sides of the lower surface of the mounting plate 31, and mounting brackets 3 are fixedly connected to the output ends of the first electric telescopic rods 32. 3. A connecting block 34 is fixedly connected to the middle of the lower surface of the mounting bracket 33. The interior of the connecting block 34 is provided with a flow diversion chamber 35, a damping chamber 36 and a pressure stabilizing chamber 37 from top to bottom. A mold lip 38 is fixedly connected to the lower surface of the connecting block 34. The connecting block 34 and the mold lip 38 are in communication. Multiple resistance blocks 39 are provided in the middle of one side of the connecting block 34. Multiple heating blocks 310 are fixedly connected to one side of the lower surface of the mold lip 38. Multiple heating wires 311 are provided inside the heating blocks 310. A liquid storage tank 312 is provided in the middle of the upper surface of the mounting bracket 33.

[0024] The mounting plate 31 is provided with a second electric telescopic rod 313 near the middle of the front and rear ends. The output end of the second electric telescopic rod 313 is fixedly connected to the squeezing plate 314. The lower surface of the liquid storage tank 312 is provided with a discharge port 315, and the lower end of the discharge port 315 extends through to the inner wall of the connecting block 34.

[0025] Furthermore, this embodiment achieves localized adjustment of the flow channel resistance by adjusting the insertion depth of the resistance block 39 within the damping cavity 36, thereby precisely controlling the flow and pressure distribution at various lateral positions of the die head. This effectively compensates for the problem of excessively high intermediate pressure caused by differences in fluid characteristics, ensuring the uniformity of the extrusion process. On this basis, the heating block 310 is precisely temperature-controlled by the heating wire 311. Utilizing the thermal expansion and contraction characteristics of metal materials, the micron-level adjustment of the local opening of the die lip 38 is achieved. Through this dual adjustment mechanism, not only is precise control of the extrusion pressure achieved, but also dynamic compensation for the gap of the die lip 38 is made, significantly improving the dimensional accuracy and surface quality of the product, and providing a reliable guarantee for the stable production of high-quality products.

[0026] Example 2: Based on Example 1, a preferred embodiment of the coating machine for uniform coating provided by this utility model is as follows: Figure 1-4 As shown: The adsorption component 4 includes an adsorption cavity 41, which is located in the middle of the platform 1. Multiple adsorption holes 42 are provided in the middle of the upper surface of the platform 1.

[0027] A first connecting frame 43 is fixedly connected to the middle of the lower surface of the platform 1. An air suction pump 44 is fixedly connected to the inner bottom surface of the first connecting frame 43. The air suction end of the air suction pump 44 passes through a pipe into the adsorption chamber 41.

[0028] The moving component 5 includes a mounting block 51, which is fixedly connected to the upper end of the front outer wall of the connecting plate 2. A sliding groove 52 is provided in the middle of the front outer wall of the mounting block 51, and a servo motor 53 is fixedly connected to the middle of one side outer wall of the mounting block 51.

[0029] The output end of the servo motor 53 is fixedly connected to a threaded rod 54. The side of the threaded rod 54 away from the servo motor 53 is rotatably connected to the mounting block 51. A threaded sleeve 55 is fitted on the outer wall of one side of the threaded rod 54. The front end of the threaded sleeve 55 is fixedly connected to the mounting plate 31.

[0030] The front end of the upper surface of the platform 1 is connected to the second connecting frame 6. The upper end of the outer wall of the rear end of the second connecting frame 6 is provided with a limiting groove 7, and the front end of the mounting plate 31 slides inside the limiting groove 7.

[0031] The control panel 8 is fixedly connected to the upper end of one side of the front outer wall of the second connecting frame 6. The first electric telescopic rod 32, heating wire 311, second electric telescopic rod 313, air pump 44 and servo motor 53 are all electrically connected to the control panel 8.

[0032] Furthermore, in this embodiment, a stable negative pressure environment is formed inside the adsorption chamber 41 by the suction pump 44. Then, the substrate is uniformly and firmly adsorbed onto the surface of the platform 1 by the array of adsorption holes 42. This not only ensures a tight fit between the substrate and the platform 1, but also effectively eliminates material vibration and local lifting that may occur in key areas during the coating process. This provides a stable and vibration-free processing base for subsequent coating processes, significantly improving the accuracy of the coating process and the quality of the finished product.

[0033] In use, by placing the substrate in the middle of the upper surface of the platform 1, a stable negative pressure environment is formed inside the adsorption chamber 41 by the suction pump 44. Then, the substrate is uniformly and firmly adsorbed onto the surface of the platform 1 by the array of adsorption holes 42, ensuring a tight fit between the substrate and the platform 1. This effectively eliminates material vibration and local lifting that may occur in key areas during the coating process, providing a stable and vibration-free processing base for subsequent coating processes, and significantly improving the precision of the coating process and the quality of the finished product.

[0034] Then, the first electric telescopic rod 32 drives the mounting frame 33 to rise and fall to a suitable height. Subsequently, the servo motor 53 drives the threaded rod 54 to rotate, and the threaded sleeve 55 moves to move the mounting plate 31. At the same time, the second electric telescopic rod 313 drives the extrusion plate 314 to descend, squeezing the internal liquid through the outlet 315 into the interior of the connecting block 34. The liquid initially receives and diffuses the high-pressure melt from the extruder through the diversion chamber 35. Then, by adjusting the insertion depth of the resistance block 39 in the damping chamber 36, the flow channel resistance is locally adjusted, thereby precisely controlling the flow and pressure distribution at various positions in the lateral direction of the die head. The fabric effectively compensates for the problem of high intermediate pressure caused by poor fluid characteristics, ensuring the uniformity of the extrusion process. Subsequently, the high-pressure melt enters the interior of the pressure stabilizing chamber 37, so that the pressure of the adjusted fluid tends to be balanced here. Finally, it flows out evenly through the gap of the die lip 38. On this basis, the heating wire 311 precisely controls the temperature of the heating block 310. By utilizing the thermal expansion and contraction characteristics of metal materials, the micron-level adjustment of the local opening of the die lip 38 is achieved, realizing precise control of extrusion pressure and dynamic compensation of the gap of the die lip 38. This improves the dimensional accuracy and surface quality of the product, providing a reliable guarantee for the stable production of high-quality products.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A uniform coating machine, comprising a platform (1), a connecting plate (2), a coating assembly (3), an adsorption assembly (4), and a moving assembly (5), characterized in that: The connecting plate (2) is located at the rear end of the platform (1), the coating assembly (3) is located on the moving assembly (5), the adsorption assembly (4) is located in the middle of the platform (1), the moving assembly (5) is located on the connecting plate (2), the coating assembly (3) includes a mounting plate (31), the mounting plate (31) is located at the upper end of the platform (1), and the two sides of the lower surface of the mounting plate (31) are fixedly connected to the first electric telescopic rod (32). The output end of the first electric telescopic rod (32) is fixedly connected to the mounting bracket (33), and the middle of the lower surface of the mounting bracket (33) is fixedly connected to the connecting plate (2). The connecting block (34) has a flow-diverting cavity (35), a damping cavity (36) and a pressure-stabilizing cavity (37) respectively opened from top to bottom inside. The lower surface of the connecting block (34) is fixedly connected to a mold lip (38). The connecting block (34) and the mold lip (38) are in communication. Multiple resistance blocks (39) are provided in the middle of one side of the connecting block (34). Multiple heating blocks (310) are fixedly connected to one side of the lower surface of the mold lip (38). Multiple heating wires (311) are provided inside each heating block (310). A liquid storage tank (312) is provided in the middle of the upper surface of the mounting bracket (33).

2. A curtain coater for coating a curtain uniformly according to claim 1, wherein: The mounting plate (31) is provided with a second electric telescopic rod (313) near the middle of the front and rear ends. The output end of the second electric telescopic rod (313) is fixedly connected to a squeezing plate (314). The lower surface of the liquid storage tank (312) is provided with a discharge port (315). The lower end of the discharge port (315) extends through to the inner wall of the connecting block (34).

3. A curtain coater for coating a curtain uniformly according to claim 1, wherein: The adsorption assembly (4) includes an adsorption cavity (41), which is located in the middle of the platform (1). Multiple adsorption holes (42) are provided in the middle of the upper surface of the platform (1).

4. A curtain coater for coating a substrate with a uniform curtain of coating material as claimed in claim 3 wherein: A first connecting frame (43) is fixedly connected to the middle of the lower surface of the platform (1), and an air suction pump (44) is fixedly connected to the inner bottom surface of the first connecting frame (43). The air suction end of the air suction pump (44) passes through a pipe into the adsorption chamber (41).

5. A curtain coater for coating a curtain uniformly according to claim 1, wherein: The moving component (5) includes a mounting block (51), which is fixedly connected to the upper end of the front outer wall of the connecting plate (2). A sliding groove (52) is provided in the middle of the front outer wall of the mounting block (51), and a servo motor (53) is fixedly connected to the middle of one side outer wall of the mounting block (51).

6. A coating machine for uniform coating according to claim 5, characterized in that: The output end of the servo motor (53) is fixedly connected to a threaded rod (54). The side of the threaded rod (54) away from the servo motor (53) is rotatably connected to the mounting block (51). A threaded sleeve (55) is fitted on the outer wall of one side of the threaded rod (54). The outer wall of the front end of the threaded sleeve (55) is fixedly connected to the mounting plate (31).

7. A curtain coater for coating a substrate with a uniform curtain of coating material as defined in claim 1, wherein: The front end of the upper surface of the platform (1) is connected to a second connecting frame (6), and a limiting groove (7) is opened at the upper end of the outer wall of the rear end of the second connecting frame (6). The front end of the mounting plate (31) slides inside the limiting groove (7).

8. A curtain coater for coating a substrate with a uniform curtain of coating material as claimed in claim 7, wherein: The upper end of the front outer wall of the second connecting frame (6) is fixedly connected to the control panel (8). The first electric telescopic rod (32), heating wire (311), second electric telescopic rod (313), air pump (44) and servo motor (53) are all electrically connected to the control panel (8).

Images