A cast head and film casting machine

Abstract

The application relates to the technical field of automatic production lines, and provides a casting head and a film casting machine. The casting head comprises a lower die head with a casting cavity, an upper die head arranged on the lower die head, and side connecting plates connected to the left and right sides of the upper die head and the lower die head respectively. The upper die head extends forward along the length direction to form an upper lip part. The lower die head extends forward along the length direction to form a lower lip part. The upper lip part and the lower lip part form a slit outlet communicated with the casting cavity after being enclosed by the upper die head and the lower die head. The front end surface of the upper lip part is an arc surface, and the front end surface of the lower lip part is an inclined plane. In the application, the position of the casting head is adjusted during coating by using the casting head, so that different positions of the arc surface of the upper lip part are opposite to the base tape. In this way, the distance between the slit outlet and the base tape is adjusted, and the thickness of the coating is adjusted. The structure is improved simply, and is not limited by material and process, so that the adjustment is more convenient.

Description

Technical Field

[0001] This application belongs to the field of automated production line technology and relates to a casting head and a film casting machine. Background Technology

[0002] A casting machine is a molding device that prepares a slurry into a thin film shape. It is widely used in the production of dielectric films in fields such as electronic components, electronic materials, magnetic materials, and special ceramics. A high-precision electronic ceramic casting machine uses alumina as the main raw material for ceramic casting. First, the pulverized powder is mixed with binders, plasticizers, dispersants, and solvents to form a slurry with a certain viscosity. Then, the slurry is cast or coated onto a special base tape. After drying and demolding, it is cut into films of the corresponding specifications according to the full width.

[0003] With the increasing demand for high-precision films in various industrial applications, the requirements for cast films are also becoming more stringent. Thickness control of cast films plays a crucial role in the production process, directly affecting product performance and quality. Thickness control can be improved through improvements in equipment, materials, and processes. However, material improvements are limited by application requirements, and process improvements are relatively expensive. Therefore, improving equipment is the most cost-effective and offers greater versatility. Utility Model Content

[0004] The purpose of this application is to provide a casting head and a film casting machine to solve the technical problem of casting film thickness control in the prior art from the perspective of equipment structure.

[0005] To achieve the above objectives, the technical solution adopted in this application embodiment is: a casting head, including a lower die head having a casting cavity, an upper die head covering the lower die head, and side connecting plates respectively connected to the left and right sides of the upper die head and the lower die head. The upper die head extends forward along its length direction to form an upper lip, and the lower die head extends forward along its length direction to form a lower lip. After the upper die head and the lower die head are closed, a slit outlet communicating with the casting cavity is formed between the upper lip and the lower lip. The front end face of the upper lip is an arc-shaped surface, and the front end face of the lower lip is an inclined plane.

[0006] Specifically, the side connecting plate extends forward to form a connector that is flush with the upper and lower lips. The upper part of the front end face of the connector is an arc-shaped surface that matches the front end face of the upper lip, and the lower part of the front end face of the connector is an inclined plane that matches the front end face of the lower lip.

[0007] Specifically, the radius of curvature of the arc-shaped surface ranges from 5mm to 10mm.

[0008] Specifically, it also includes a temperature regulating component disposed on the upper lip for adjusting the temperature of the upper lip.

[0009] Specifically, the temperature regulating component includes a plurality of temperature sensors uniformly arranged along the length of the upper lip and a temperature control element connected to each of the temperature sensors.

[0010] Specifically, the upper lip has a groove near the top of the arcuate surface, and the groove is arranged along the length direction of the upper lip.

[0011] Specifically, the cross-section of the groove is inclined in the shape of a V.

[0012] Specifically, the upper die head is provided with upper connecting holes at both ends, the lower die head is provided with lower connecting holes at both ends, and the side connecting plate is provided with upper side connecting holes and lower side connecting holes respectively connected to the upper connecting holes and the lower connecting holes.

[0013] Specifically, the cross-section of the casting cavity is semi-circular.

[0014] This application also provides a film casting machine, including a worktable, a casting head disposed on the worktable, wherein a slurry flows inside the casting head, and a baseband conveying device disposed on the worktable and close to the casting head, wherein the slit outlet of the casting head faces the baseband conveying device, and the casting head is the aforementioned casting head.

[0015] In this application, the front end face of the upper lip is set as an arc-shaped surface, and the front end face of the lower lip is an inclined plane. During the coating process using the casting head, the position of the casting head is adjusted so that different positions of the arc-shaped surface of the upper lip are aligned with the base tape. This facilitates the adjustment of the distance between the slit exit and the base tape, thereby adjusting the coating thickness. This structural improvement is simple and not limited by materials or processes, making adjustment more convenient. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the casting head provided in an embodiment of this application;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 A side view of the casting head provided in this embodiment of the application after one of the connecting plates has been removed;

[0020] Figure 4 for Figure 3 Enlarged view at point B in the middle;

[0021] Figure 5 This is a schematic diagram of the coating process using a casting head in an embodiment of this application;

[0022] Labels for each item in the figure:

[0023] 10-Upper mold head; 11-Upper lip; 111-Front end face of upper lip; 112-Groove; 12-Upper connecting hole;

[0024] 20 - Lower die head; 21 - Lower lip; 211 - Front end face of lower lip; 22 - Casting cavity; 23 - Lower connecting hole;

[0025] 30 - Side connecting plate; 31 - Connector; 32 - Upper side connecting hole; 33 - Lower side connecting hole;

[0026] 40 - Slit Exit;

[0027] 50-Baseband. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0032] Reference Figures 1 to 4 This application provides a casting head, including a lower die head 20 with a casting cavity 22, an upper die head 10 covering the lower die head 20, and side connecting plates 30 respectively connecting the left and right sides of the upper die head 10 and the lower die head 20. The upper die head 10 and the lower die head 20 are fixedly connected as one unit by the side connecting plates 30 on both sides. The upper die head 10 extends forward along its length direction to form an upper lip 11, and the lower die head 20 extends forward along its length direction to form a lower lip 21. The upper die head 10 covers the lower die head 20, so that after the upper die head 10 and the lower die head 20 are closed, a slit outlet 40 communicating with the casting cavity 22 is formed between the upper lip 11 and the lower lip 21, and the slurry flows out from the casting cavity 22 through the slit outlet 40. In this embodiment, the front end face 111 of the upper lip 11 is an arc-shaped surface, and the front end face 211 of the lower lip 21 is an inclined plane.

[0033] In this embodiment, the front end face 111 of the upper lip 11 is set as an arc-shaped surface, and the front end face 211 of the lower lip 21 is an inclined plane. For example... Figure 5 As shown, during the coating process using the casting head, the position of the casting head is adjusted so that different positions of the arc-shaped surface of the upper lip 11 are aligned with the base tape. This facilitates the adjustment of the distance between the slit exit 40 and the base tape 50, thereby adjusting the coating thickness. This structural improvement is simple and not limited by materials or processes, making adjustment more convenient.

[0034] Furthermore, in this embodiment, the side connecting plates 30 are located on both sides for connecting the upper die head 10 and the lower die head 20. During coating, the side connecting plates 30 are also directly opposite the base strip 50. To avoid interference between the side connecting plates 30 and the base strip 50, the same structure is also provided at the front end of the side connecting plates 30. Specifically, refer to... Figure 2 The side connecting plate 30 extends forward to form a connector 31 that is flush with the upper lip 11 and the lower lip 21. The upper part of the front end face of the connector 31 is an arc-shaped surface that matches the front end face of the upper lip 11, and the lower part of the front end face of the connector 31 is an inclined plane that matches the front end face of the lower lip 21.

[0035] In this embodiment, the adjustment of the coating thickness is a fine-tuning; therefore, the radius of curvature of the arc surface ranges from 5mm to 10mm.

[0036] Furthermore, the upper lip 11 has a groove 112 near the top of the arc-shaped surface, and the groove 112 is provided along the length direction of the upper lip 11. The purpose of providing this groove 112 is to control the covering angle between the arc-shaped surface and the base strip 50, thereby balancing the amount of slurry discharged, buffering pressure fluctuations, and avoiding thickness uniformity deviations after casting. Specifically, the cross-section of the groove 112 is inclined V-shaped.

[0037] Furthermore, in this embodiment, the casting head also includes a temperature regulating component (not shown in the figure) disposed on the upper lip 11 for adjusting the temperature of the upper lip 11. When the temperature of the slurry in the casting cavity 22 changes, the upper lip 11 and the lower lip 21 will expand or contract when the slurry flows out from the slit outlet 40, thereby causing deformation and affecting the distance between them and the base belt 50. By providing the temperature regulating component, the temperature of the upper die head 10 and the lower die head 20 can be monitored. When the upper lip 11 and the lower lip 21 deform at different temperatures, the position of the casting head can be adjusted, thereby adjusting the distance between the casting head and the base belt 50 to adjust the coating weight and thickness, and maintain coating consistency.

[0038] Specifically, the temperature regulation assembly includes multiple temperature sensors evenly arranged along the length of the upper lip 11 and a temperature control element connected to each temperature sensor. The temperature sensors are used to sense the temperature at various locations on the upper lip 11, and the temperature control element can provide temperature feedback for temperature regulation, or adjust the position of the casting head based on the temperature information, thereby adjusting the distance between the slit outlet 40 of the casting head and the baseband 50.

[0039] Reference Figure 1 , Figure 3 In this embodiment, upper connecting holes 12 are provided at both the left and right ends of the upper mold head 10, and lower connecting holes 23 are provided at both the left and right ends of the lower mold head 20. Side upper connecting holes 32 and side lower connecting holes 33 are provided on both side connecting plates 30. The side upper connecting holes 32 are fixedly connected to the upper connecting holes 12, and the side lower connecting holes 33 are fixedly connected to the lower connecting holes 23. Thus, the upper mold head 10 and the lower mold head 20 are fixed together as one unit through the side connecting plates 30.

[0040] Reference Figure 3 The cross-section of the casting cavity 22 is semi-circular. Of course, the cross-section of the casting cavity 22 can also be other shapes.

[0041] This application embodiment also provides a film casting machine (not shown in the figure), including a worktable, a casting head as described above disposed on the worktable, a slurry flowing inside the casting head, and a baseband 50 conveying device disposed on the worktable and close to the casting head, with the slit outlet 40 of the casting head facing the baseband 50 conveying device.

[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A casting head, comprising a lower die head having a casting cavity, an upper die head covering the lower die head, and side connecting plates respectively connected to the left and right sides of the upper die head and the lower die head, characterized in that: The upper die head extends forward along its length to form an upper lip, and the lower die head extends forward along its length to form a lower lip. After the upper die head and the lower die head are enclosed, a slit outlet communicating with the casting cavity is formed between the upper lip and the lower lip. The front end face of the upper lip is an arc-shaped surface, and the front end face of the lower lip is an inclined plane.

2. The casting head according to claim 1, characterized in that: The side connecting plate extends forward to form a connector that is flush with the upper and lower lips. The upper part of the front end face of the connector is an arc-shaped surface that matches the front end face of the upper lip, and the lower part of the front end face of the connector is an inclined plane that matches the front end face of the lower lip.

3. The casting head according to claim 1, characterized in that: The radius of curvature of the arc-shaped surface ranges from 5mm to 10mm.

4. The casting head according to claim 1, characterized in that: It also includes a temperature regulating component disposed on the upper lip for adjusting the temperature of the upper lip.

5. The casting head according to claim 4, characterized in that: The temperature regulation assembly includes a plurality of temperature sensors uniformly arranged along the length of the upper lip and a temperature control element connected to each of the temperature sensors.

6. The casting head according to claim 1, characterized in that: The upper lip has a groove near the top of the arc-shaped surface, and the groove is arranged along the length direction of the upper lip.

7. The casting head according to claim 6, characterized in that: The groove has an inclined V-shaped cross-section.

8. The casting head according to claim 1, characterized in that: The upper die head is provided with upper connecting holes at both ends, and the lower die head is provided with lower connecting holes at both ends. The side connecting plate is provided with upper side connecting holes and lower side connecting holes that are respectively connected to the upper connecting holes and the lower connecting holes.

9. The casting head according to claim 1, characterized in that: The cross-section of the casting cavity is semi-circular.

10. A film casting machine, comprising a worktable, a casting head disposed on the worktable, wherein a slurry flows within the casting head, and a baseband conveying device disposed on the worktable and close to the casting head, wherein the slit outlet of the casting head faces the baseband conveying device, characterized in that: The casting head is the casting head according to any one of claims 1 to 9.

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