Capacitor thin film melt homogenous extrusion device

Abstract

The utility model relates to a kind of capacitor film melt uniform extrusion device, including extruder main body, the side of extruder main body is equipped with discharge port, hot melt mixing assembly is fixedly installed on the end face of discharge port, the other end of hot melt mixing assembly is connected with extrusion die, the lower portion of extrusion die is equipped with conveying belt, and the top surface of conveying belt two sides is respectively equipped with mounting bracket, cooling roller is movably installed on mounting bracket, and the surface of cooling roller is closely attached with the film surface on conveying belt;The present application is improved based on existing single screw extruder, by increasing hot melt mixing assembly at its port, so that continuous cutting mixing can be carried out to the material being extruded, and it also has heating function in the process of cutting mixing, so that the extruded material can be effectively fully mixed and the plasticizing uniformity is improved, so as to guarantee the production quality of capacitor film.

Description

Technical Field

[0001] This utility model relates to the technical field of capacitor film production equipment, specifically to a capacitor film melt uniform extrusion device. Background Technology

[0002] Capacitor film is a thin film material with special properties, such as high capacitance density: it can achieve high capacitance values ​​in a small volume, which helps to miniaturize and lighten electronic devices. Therefore, it is widely used in electronic circuits, communication equipment and energy fields.

[0003] During the production of capacitor films, the mixed raw materials are generally heated to a melt, and then extruded into a film in a relatively uniform manner, which facilitates subsequent cooling and slitting to the required size.

[0004] However, existing film extrusion devices suffer from uneven heating and poor mixing of film raw materials during production, resulting in unstable film production quality and reduced production efficiency. To address this, we designed a capacitor film melt uniform extrusion device, which effectively solves the problem of inconvenience in using traditional film extrusion devices. Utility Model Content

[0005] Based on the above description, this utility model provides a capacitor film melt uniform extrusion device to solve the shortcomings of existing film extrusion devices, which are prone to affecting film quality due to uneven temperature distribution and uneven material mixing during the production process.

[0006] This utility model is achieved through the following technical solution:

[0007] A capacitor film melt uniform extrusion device includes an extruder body, a discharge port on one side of the extruder body, a hot melt mixing component fixedly installed on the end face of the discharge port, an extrusion die connected to the other end of the hot melt mixing component, a conveyor belt below the extrusion die, and mounting frames on both sides of the top surface of the conveyor belt, with cooling rollers movably mounted on the mounting frames, and the surface of the cooling rollers closely adhering to the film surface on the conveyor belt.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the hot melt mixing assembly includes multiple mounting parts that are nested together and arranged in a ring structure. Each mounting part has a mounting groove on its front side and a corresponding protrusion on its back side. Each pair of adjacent mounting parts is fastened together by the mounting groove and the protrusion.

[0010] Furthermore, the inner walls of the mounting groove are provided with sealing gaskets on both sides. The surface of the sealing gaskets is provided with wavy protrusions. The protrusions are inserted into the mounting groove and squeezed with the sealing gaskets to form multiple sealed spaces.

[0011] Furthermore, positioning holes are provided at the edges of the plurality of mounting parts, and the plurality of mounting parts are sequentially spliced ​​together and locked and fixed by positioning hole bolts.

[0012] Furthermore, each of the mounting sections is provided with a cutting blade arranged in a mesh structure, and the cutting blade is also provided with a heating wire. The outer wall of the mounting section is provided with a power supply interface, and the heating wire is electrically connected to an external power supply line through the power supply interface.

[0013] Furthermore, the extrusion mold includes a housing, the interior of which is hollow and a pressing seat is movably installed. The front end of the housing is provided with an extrusion port, and the two inner sidewalls of the extrusion port are close to the center. The front end of the pressing seat is arranged in a conical shape and has a flat discharge port on the end face. The top and bottom surfaces of the front end of the pressing seat are respectively in close contact with the inner wall of the extrusion port.

[0014] Furthermore, the tail end of the extrusion seat is also provided with a connecting pipe, the end face of which is provided with a connecting flange and embedded in the end face of the housing, and the connecting flange is connected to the hot melt mixing assembly by bolts.

[0015] Furthermore, a cylinder is provided on the end face of the housing away from the extrusion port, and the output end of the cylinder extends inward and is fixedly connected to the end face of the tail end of the extrusion seat.

[0016] Furthermore, multiple cooling rollers are provided, and a fixing frame is arranged around the periphery of the multiple cooling rollers. An electric telescopic rod is provided on the mounting frame, and the output end of the electric telescopic rod is fixedly connected to the top surface of the fixing frame and drives the entire fixing frame to rise and fall vertically.

[0017] Furthermore, both ends of the multiple cooling rollers are movably mounted with water inlet pipes and water outlet pipes via ball bearings, and the central shaft of the multiple cooling rollers is also equipped with sprockets and connected by chain drive.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0019] This application improves upon the existing single-screw extruder by adding a hot-melt mixing component at its port, enabling continuous cutting of the extruded material. The cutting process also includes a heating function, thus effectively ensuring thorough mixing and improved plasticization uniformity of the extruded material, thereby guaranteeing the production quality of capacitor films. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the extruder body in this embodiment;

[0021] Figure 2 This is a schematic diagram of the structure of the hot melt mixing component in this embodiment;

[0022] Figure 3 This is a schematic diagram of the mounting section in this embodiment;

[0023] Figure 4 This is a schematic diagram of the extrusion die in this embodiment;

[0024] Figure 5 This is a schematic diagram of the flexible adjustment structure of the extrusion die in this embodiment;

[0025] Figure 6 This is a schematic diagram of the cooling roller structure in this embodiment;

[0026] Figure 7 This is a schematic diagram of the cooling roller drive source in this embodiment;

[0027] The components include: 1. Extruder body; 2. Hot melt mixing assembly; 21. Mounting part; 22. Mounting groove; 23. Protrusion; 24. Positioning hole; 25. Cutting blade; 26. Power supply interface; 3. Extrusion die; 31. Housing; 32. Extrusion seat; 33. Connecting pipe; 34. Cylinder; 35. Extrusion port; 4. Conveyor belt; 41. Fixing frame; 42. Electric telescopic rod; 5. Cooling roller; 51. Water inlet pipe; 52. Drain pipe. Detailed Implementation

[0028] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0030] Combination Figure 1-7 As shown, a capacitor film melt uniform extrusion device includes:

[0031] The main body of the extruder 1 is an existing single-screw extruder, which is equipped with a drive motor at one end and a discharge port on the end face of the other end for continuous material conveying;

[0032] The hot melt mixing component 2 is located at the discharge port. Through continuous cutting and heating, it improves the plasticity of the raw materials and enhances melt heat transfer, resulting in more uniform mixing of the raw materials.

[0033] The extrusion die 3 is located at the outward end of the hot melt mixing component 2, and discharges the molten raw material in sheet form through the internal extrusion structure, thus initially shaping it;

[0034] Conveyor belt 4 is used to assist in the conveying of sheet-like raw materials;

[0035] Cooling rollers 5 are mounted on the mounting frames on both sides of the conveyor belt 4 and perform preliminary cooling of the hot molten raw material that has just been discharged by extrusion.

[0036] Specifically, in this embodiment, the hot melt mixing component 2 includes multiple interlocking mounting parts 21 arranged in a ring structure. Each mounting part 21 has a mounting groove 22 on its front side and a corresponding protrusion 23 on its back side. (The mounting groove 22 and the protrusion 23 can also be set on the side wall of the central hole to form a stepped combination structure, which can also achieve a sealing combination effect.) Each pair of adjacent mounting parts 21 are interlocked and fixed by the mounting groove 22 and the protrusion 23. Thus, by using this splicing method, multiple mounting parts 21 can be combined according to actual needs.

[0037] In addition, sealing gaskets are provided on both sides of the inner wall of the mounting groove 22. The surface of the sealing gasket has wavy protrusions. The protrusions 23 are inserted into the interior of the mounting groove 22 and squeezed with the sealing gasket to form multiple sealed spaces. These sealed spaces, together with the above-mentioned splicing structure, ensure that there are no gaps between adjacent mounting parts 21, thus achieving a good sealing effect. Furthermore, in order to effectively enhance the connection stability between the two mounting parts 21, multiple positioning holes 24 should be arranged around the edge of the mounting part 21. The positioning holes 24 penetrate the mounting part 21 and are locked and fixed with bolts.

[0038] The inner wall of the mounting section 21 is also provided with cutting blades 25 arranged in a mesh structure, and in every two adjacent mounting sections 21, the internal cutting blades 25 should be staggered, for example... Figure 2 and Figure 3 As shown, the raw materials in the molten state can be cut and recombined multiple times. In addition, the blades can be set to an inclined state, which allows the raw materials to be continuously cut and mixed by relying on the inclined channel, greatly improving the uniformity of the raw material mixture.

[0039] In this structure, the cutting blade 25 is equipped with a heating wire inside. The outer wall of the mounting part 21 has a power supply interface 26 for supplying power to the heating wire, which is electrically connected to an external power source. This allows the raw material to be further heated during the cutting process, thereby improving its plasticization uniformity and ensuring smoother operation in subsequent extrusion production, ultimately improving the production quality of the capacitor film. Compared to the static mixers installed in some existing extruders, this combined hot melt mixing assembly 2 can not only lengthen or shorten its mixing and heating stroke as needed, but also allows for more complex conveying channels composed of the internal cutting blades 25 through rotational adjustment, thus improving the uniformity of mixing during conveying. Furthermore, the detachable structure allows for easy and thorough cleaning during subsequent disassembly. Even if some of the cutting blades 25 inside the hot melt mixing assembly 2 are damaged, the corresponding parts can be replaced, avoiding increased costs due to complete replacement, thus making it more convenient to use.

[0040] The extrusion mold 3 includes a housing 31, which has a conical structure. The housing 31 is hollow inside and has an extrusion seat 32 movably installed. The front end of the housing 31 is provided with an extrusion port 35. The two inner sidewalls of the extrusion port 35 are inclined towards the center, which narrows the upper and lower space at the port. The two ends are flattened outward. The front end of the extrusion seat 32 is arranged in a conical shape and has a flat discharge port on the end face. The top and bottom surfaces of the front end of the extrusion seat 32 are tightly fitted with the inner wall of the extrusion port 35.

[0041] In the above structure, the tail end of the extrusion seat 32 is also provided with a connecting pipe 33. The end face of the connecting pipe 33 is provided with a connecting flange and is embedded in the end face of the housing 31, so that the end face of the housing 31 is locked and fixed to the end face of the hot melt mixing component 2 by means of the connecting flange and bolts, thereby connecting the two. Therefore, the hot melt material can be input into the interior of the extrusion seat 32 along the connecting pipe 33 and output to the outside of the extrusion die 3 along the flat discharge port.

[0042] In addition, in actual production, there are various types of capacitor films with different thicknesses. Therefore, when changing production, in order to improve the versatility of the extrusion equipment, an adjustable function should be provided on the extrusion die 3 to cope with the production of capacitor films of different thicknesses.

[0043] A cylinder 34 (or various telescopic adjustment devices that can be remotely controlled, such as an electric telescopic rod 42, a hydraulic cylinder, or an electric push rod) is provided at the end of the housing 31 away from the extrusion port 35. The output end of the cylinder 34 extends inward and is fixedly connected to the tail end face of the extrusion seat 32. Since the cylinder 34 will pull the extrusion seat 32 to move back and forth inside the housing 31, the connecting pipe 33 should be made of a corrugated pipe of a high-temperature resistant elastic material such as silicone rubber or fluororubber to maintain the conveying effect during telescopic adjustment.

[0044] The entire extrusion seat 32 should also be made of this high-temperature resistant elastic material, while the extrusion port at its front end should be made of a non-elastic material. The purpose is to utilize the elastic extrusion of the main body to cause the extrusion port at the front end to change accordingly, for example... Figure 5 As shown, when the entire extrusion seat 32 moves forward, the die lips gradually come together, making the gap at the discharge port smaller, thereby controlling the thickness of the extruded material.

[0045] Based on the above extrusion fine-tuning structure, in this embodiment, a laser measuring instrument should also be additionally equipped at the extrusion port 35 of the housing 31. That is, two laser displacement sensors are emitted from above and below each other to measure the upper and lower surfaces of the extruded film material, thereby quickly measuring its specific thickness. This information can then be transmitted to the control center, which can control the cylinder 34 through a PLC controller or manually to adjust the cylinder 34 to move forward or backward, thereby fine-tuning the discharge. This not only applies to the production of films of various sizes, but also, compared with traditional extrusion dies, the flexible extrusion die 3 used in this embodiment produces films with more uniform thickness, and its adjustment method is convenient and easier to use.

[0046] Below the extrusion port 35 of the extrusion die 3, a conveyor belt 4 is also arranged horizontally. The belt on the conveyor belt 4 should be designed to be heat-resistant and non-adhesive, such as a glass fiber conveyor belt 4, a ceramic fiber conveyor belt 4, etc., so that the raw material in the molten state can be horizontally attached to the conveyor belt 4.

[0047] Mounting frames are provided on both sides of the conveyor belt 4. The mounting frames extend upward and have a fixed frame 41 at the top. Multiple cooling rollers 5 are rotatably mounted on the fixed frame 41. The interior of the cooling roller 5 is hollow, and its two ends are connected to a water inlet pipe 51 and a drain pipe 52 through ball bearings, respectively. The cold water delivered to the inside of the cooling roller 5 is delivered to the edge of the cooling roller 5 through the guide hole, so that it can exchange heat with the capacitor film on the conveyor belt 4. Then the hot water after heat exchange is completed is discharged to achieve the purpose of cooling the capacitor film.

[0048] Meanwhile, in this structure, the mounting frame is also equipped with an electric telescopic rod 42 (or a lifting structure such as a cylinder 34 or a hydraulic cylinder). Multiple rods are set according to the size of the fixed frame 41, so that the telescopic end is fixedly connected to the top surface of the fixed frame 41, thereby allowing it to move up and down. Especially in the initial cooling stage, the initially formed capacitor film can be squeezed by extending downwards, compressing it into a thin sheet.

[0049] Multiple cooling rollers 5 are connected by chains and sprockets, and corresponding drive motors are equipped on the fixed frame 41 as power sources to ensure that all cooling rollers 5 can rotate in the same direction, thus forming a conveying structure with the conveyor belt 4. The surface of the cooling rollers 5 should be mirror-polished to prevent adhesion and maintain smoothness, which can effectively improve the effect of subsequent film extrusion, making the surface of the extruded film neat and preventing film adhesion, thus effectively ensuring the production quality of capacitor film.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A capacitor film melt uniform extrusion device, characterized in that, The extruder body (1) is provided with a discharge port on one side. A hot melt mixing component (2) is fixedly installed on the end face of the discharge port. An extrusion die (3) is connected to the other end of the hot melt mixing component (2). A conveyor belt (4) is provided below the extrusion die (3). Mounting frames are provided on both sides of the top surface of the conveyor belt (4). A cooling roller (5) is movably installed on the mounting frame. The surface of the cooling roller (5) is in close contact with the film surface on the conveyor belt (4).

2. The capacitor film melt uniform extrusion device according to claim 1, characterized in that, The hot melt mixing assembly (2) includes multiple mounting parts (21) that are nested together and arranged in a ring structure. Each mounting part (21) has a mounting groove (22) on its front side and a protrusion (23) on its back side. Each pair of adjacent mounting parts (21) are fastened together by the mounting groove (22) and the protrusion (23).

3. The capacitor film melt uniform extrusion device according to claim 2, characterized in that, The inner walls of the mounting groove (22) are also provided with sealing gaskets on both sides. The surface of the sealing gasket is provided with wavy protrusions. The protrusions (23) are inserted into the mounting groove (22) and squeezed with the sealing gasket to form multiple sealed spaces.

4. The capacitor film melt uniform extrusion device according to claim 3, characterized in that, The edges of the plurality of mounting parts (21) are also provided with positioning holes (24), and the plurality of mounting parts (21) are spliced ​​together in sequence and locked and fixed by bolts through the positioning holes (24).

5. The capacitor film melt uniform extrusion device according to claim 4, characterized in that, Each of the mounting portions (21) is provided with a cutting blade (25) arranged in a mesh structure. The cutting blade (25) is also provided with a heating wire. The outer wall of the mounting portion (21) is provided with a power supply interface (26). The heating wire is electrically connected to an external power supply line through the power supply interface (26).

6. The capacitor film melt uniform extrusion apparatus according to claim 1, characterized in that, The extrusion mold (3) includes a housing (31), the interior of which is hollow and a pressing seat (32) is movably installed. The front end of the housing (31) is provided with an extrusion port (35), and the two inner sidewalls of the extrusion port (35) are close to the center. The front end of the pressing seat (32) is arranged in a conical shape and has a flat discharge port on the end face. The top and bottom surfaces of the front end of the pressing seat (32) are respectively in close contact with the inner wall of the extrusion port (35).

7. The capacitor film melt uniform extrusion apparatus according to claim 6, characterized in that, The tail end of the extrusion seat (32) is also provided with a connecting pipe (33), the end face of the connecting pipe (33) is provided with a connecting flange and is embedded in the end face of the housing (31), and the connecting flange is connected to the hot melt mixing assembly (2) by bolts.

8. The capacitor film melt uniform extrusion apparatus according to claim 7, characterized in that, A cylinder (34) is also provided on the end face of the housing (31) away from the extrusion port (35). The output end of the cylinder (34) extends inward and is fixedly connected to the end face of the tail end of the extrusion seat (32).

9. The capacitor film melt uniform extrusion apparatus according to claim 1, characterized in that, The cooling rollers (5) are provided in multiple units, and a fixed frame (41) is arranged around the multiple cooling rollers (5). An electric telescopic rod (42) is provided on the mounting frame. The output end of the electric telescopic rod (42) is fixedly connected to the top surface of the fixed frame (41) and drives the entire fixed frame (41) to rise and fall vertically.

10. The capacitor film melt uniform extrusion apparatus according to claim 9, characterized in that, Both ends of the multiple cooling rollers (5) are movably mounted with water inlet pipes (51) and drain pipes (52) via ball bearings, and the central shaft of the multiple cooling rollers (5) is also provided with sprockets and connected by chain drive.

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