Glass die head

Abstract

The invention discloses a glass die head, belongs to the technical field of battery coating, and solves the problem that process optimization and problem diagnosis are limited to a certain extent due to the fact that the flowing condition of slurry in the die head cannot be visually observed. Comprising an upper die and a lower die which are mutually hinged through a hinge, and a gasket arranged between the upper die and the lower die, and the upper die and the lower die are both made of glass materials. The glass material is adopted, the flowing condition of slurry in the die head can be visually observed, and debugging and research are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of battery coating, in particular to a glass die head. Background Art

[0002] In the competition in the field of lithium batteries, the pursuit of ultra-thin, high energy density and fast charging performance has become the industry standard. Therefore, the technical requirements for specific products have also increased accordingly. For example, the new ultra-thin coating technology on the market has not only become a highlight, but also spawned equipment specifically for the production of thin coatings. Among these equipment, the thin coating extrusion head equipment, that is, the thin coating extrusion die, plays a vital role. The thin coating extrusion die consists of an upper die, a lower die and a gasket plate located between the two, and the lip sheet is fixed by the upper and lower dies. The specific thickness of the lip sheet forms a spray lip on one side of the die, with the upper die corresponding to the upper spray lip and the lower die corresponding to the lower spray lip. These spray lips are connected to the distribution cavity inside the die, and a feed pipe is provided in the center of the strip distribution cavity to ensure smooth flow and uniform distribution of the material.

[0003] Currently, the mainstream material for coating dies is stainless steel. Although a very small number of non-stainless steel materials, such as ceramics, are used, these materials are not transparent. This means that during the coating process, we cannot visually observe the flow of the slurry inside the die, which to a certain extent limits process optimization and problem diagnosis. In addition, the cost of the die materials currently used is relatively high. In the context of the entire industry seeking to reduce costs and improve efficiency, people have begun to explore more economical and durable alternative materials. Stainless steel coating dies may produce trace amounts of metal foreign matter during the coating process, and the presence of these foreign matter poses a great potential risk to battery safety.

[0004] Therefore, a glass die head is proposed to solve or alleviate the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to provide a glass die head.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A glass die head comprises an upper die and a lower die hinged to each other through a hinge, and a gasket arranged between the upper die and the lower die, wherein the upper die and the lower die are both made of glass.

[0007] Preferably, the glass material is oxide glass or non-oxide glass.

[0008] Preferably, the glass material includes silicon dioxide, zirconium dioxide, yttrium oxide, aluminum oxide, and gadolinium oxide.

[0009] Preferably, the glass material includes 28 parts of silicon dioxide, 9 parts of zirconium dioxide, 5 parts of yttrium oxide, 39 parts of aluminum oxide, and 19 parts of gadolinium.

[0010] Preferably, the glass material includes 28.22% silicon dioxide, 8.75% zirconium dioxide, 4.83% yttrium oxide, 39.43% aluminum oxide, and 18.77% gadolinium oxide.

[0011] Preferably, the front side of the upper mold is integrally formed with an upper lip protruding outward, the top surface of the upper mold is provided with a plurality of glue dispensing holes penetrating therethrough, the glue dispensing holes can be opened and closed, and the bottom surface of the upper mold is provided with a receiving groove between the glue dispensing holes and the upper lip, a plurality of flow-blocking blocks are vertically slidably connected in the receiving groove, adjacent flow-blocking blocks are arranged in close contact with each other, and a pull rod is fixedly connected to the upper mold.

[0012] Preferably, the upper mold is fixedly connected with a plurality of dispensing valves connected with the dispensing holes, and the dispensing valves control the opening and closing of the dispensing holes.

[0013] Preferably, the top surface of the upper mold is provided with a plurality of through holes connected to the accommodating groove, the top surface of the upper mold is fixedly connected with an adjusting pressure plate with an inverted L-shaped cross-section, the top surface of the upper mold is fixedly connected with a plurality of limit seats located below the adjusting pressure plate, the adjusting pressure plate is provided with a control component, the movable rod of the control component passes through the limit seat and the through hole to the accommodating groove, and the end of the movable rod away from the control component is fixedly connected to the baffle block.

[0014] Preferably, the front side of the lower mold is integrally formed with a lower lip protruding outward, the top surface of the lower mold is recessed downward to form a slurry distribution cavity, the back side of the lower mold is provided with a feed channel connected to the slurry distribution cavity, and the back side of the lower mold is fixedly connected with a feed pipe connected to the feed channel.

[0015] The present invention has the following beneficial effects: 1. Made of glass, the flow of slurry inside the die head can be visually observed, which is convenient for debugging and research; 2. The use of glass material reduces the cost of the coating die head, improves its wear resistance, and achieves cost reduction and efficiency improvement of the product; 3. Reduce the mixing of metal foreign matter (particles) during the coating process and improve battery safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the present invention is schematically shown Figure 1 ; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 The structure of the present invention is schematically shown Figure 2; Figure 4 for Figure 3 The enlarged view of point B in the middle; Figure 5 This is a schematic diagram of the structure of the present invention after removing the upper mold and the lower mold; Figure 6 for Figure 5 Enlarged view of point C in the middle; Figure 7 It is an exploded view of the upper die and the lower die in the present invention; Figure 8 It is a structural schematic diagram of the upper mold in the present invention; Fig. 9 for Figure 8 Enlarged view of point D in the middle.

[0017] 1. Upper mold; 101. Upper lip; 102. Through hole; 103. Glue dispensing hole; 104. Receiving groove; 2. Lower mold; 201. Lower lip; 202. Feed channel; 203. Slurry distribution chamber; 204. Feed pipe; 301. Pull rod; 302. Hinge; 401. Adjusting plate; 402. Control assembly; 403. Limit seat; 404. Movable rod; 405. Thwart block; 5. Glue dispensing valve. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] A glass mold head includes an upper mold 1 and a lower mold 2 hinged to each other by a hinge 302, and a gasket arranged therebetween. The upper mold 1 and the lower mold 2 are both made of glass material, and the glass material is oxide glass or non-oxide glass. The glass material includes silicon dioxide, zirconium dioxide, yttrium oxide, aluminum oxide, and gadolinium oxide. Furthermore, the glass material includes 28 parts of silicon dioxide, 9 parts of zirconium dioxide, 5 parts of yttrium oxide, 39 parts of aluminum oxide, and 19 parts of gadolinium oxide. More specifically, the glass material includes 28.22% of silicon dioxide, 8.75% of zirconium dioxide, 4.83% of yttrium oxide, 39.43% of aluminum oxide, and 18.77% of gadolinium oxide.

[0020] The Young's modulus of the glass is ≥100 GPa, and can reach up to 177.9 GPa at the highest. The Mohs hardness is ≥6, and the maximum transmittance of visible light in the range of 400nm to 800nm ​​is greater than 80%.

[0021] Titanium dioxide and zirconium dioxide have high melting points by themselves. The melting point of titanium dioxide is about 1855°C, while the melting point of zirconium dioxide is higher, about 2700°C. Adding these oxides with high melting points to glass can improve the heat resistance of the entire material, and in the glass network, titanium dioxide and zirconium dioxide can act as network formers to enhance the structural stability of the glass. Ti4+ and Zr4+ ions can form strong chemical bonds with oxygen ions, thereby enhancing the stability and heat resistance of the entire glass network. The addition of titanium dioxide and zirconium dioxide can reduce the crystallization tendency of the glass, that is, reduce the possibility of forming crystals during heating. This is crucial to maintaining the amorphous structure of the glass, because amorphous structures generally have better heat resistance. In addition, zirconium dioxide, especially its stable form (such as yttria-stabilized zirconium dioxide), has a lower thermal conductivity, which helps to reduce the transfer of heat, thereby improving the heat resistance of the material. The addition of titanium dioxide and zirconium dioxide can improve the mechanical strength of the glass, including hardness and fracture toughness. These improvements in mechanical properties help the material resist mechanical loads at elevated temperatures, thereby improving heat resistance.

[0022] Alumina forms Al-O bonds in oxide glass. These bonds have high bond energy and ion polarization ability, and can form a strong three-dimensional network structure. The strength of this structure directly improves the hardness of the glass. Al3+ ions can form multiple cross-links with the surrounding oxygen ions, which enhances the compactness of the glass network and the overall mechanical strength, thereby improving the hardness. The addition of alumina improves the scratch resistance of the glass. This is because the stability of the Al-O bond and the high hardness of alumina itself make the glass surface less susceptible to wear when subjected to friction or impact. The addition of alumina reduces the non-bridging oxygen atoms (NBOs) in the glass network, which usually cause the softening of the material. By reducing the number of NBOs, alumina helps to increase the hardness of glass. The addition of alumina not only increases the hardness of glass, but also helps to increase its elastic modulus, which is a measure of the material's ability to resist elastic deformation. High elastic modulus is usually associated with high hardness. The addition of alumina can reduce the precipitation of crystals in the glass during cooling and maintain an amorphous structure. This amorphous structure helps maintain the uniformity and hardness of the material. The addition of alumina improves the fracture toughness of the glass, which is the ability of the material to absorb energy when it is impacted or cracks extend. High fracture toughness helps maintain the integrity of the material and reduce the loss of hardness caused by cracks.

[0023] Y3+ and Gd3+ ions can introduce microcracks in the glass matrix due to their larger ionic radius. When the material is stressed, these microcracks can absorb and disperse stress, thereby improving the fracture toughness of the material. Yttrium oxide and gadolinium oxide can strengthen the non-bridging oxygen bonds (NBOs) in the glass network. These NBOs can provide additional chemical bonding, which helps to improve the elasticity and toughness of the material. The addition of yttrium oxide and gadolinium oxide can increase the transition temperature (Tg) of the glass, which means that the glass will change from a hard and brittle state to a softer and tougher state at a higher temperature, thus having better fracture toughness at room temperature. The presence of rare earth ions can improve the stress distribution inside the material and reduce stress concentration, thereby improving the elasticity and fracture resistance of the material. Yttrium oxide and gadolinium oxide can increase the plasticity of the glass. Yttrium oxide and gadolinium oxide can optimize the glass network structure and form a more uniform and tight network by interacting with other components such as alumina, thereby improving the fracture toughness. The addition of yttrium oxide and gadolinium oxide can produce a dispersion strengthening effect. The particles of rare earth elements are dispersed in the glass matrix, which can hinder the propagation of cracks and improve the fracture toughness. Yttrium oxide and gadolinium oxide can improve the thermal stability of the material, so that the glass can maintain good elasticity and toughness even at high temperatures. The addition of yttrium oxide and gadolinium oxide can also improve the optical properties of the material, such as light transmittance, which is very important for applications that require transparent or translucent properties.

[0024] like Figure 1-9 As shown, the front of the upper mold 1 is integrally formed with an upper lip 101 protruding outward, the top surface of the upper mold 1 is provided with a plurality of dispensing holes 103 penetrating the upper mold 1, the dispensing holes 103 can be opened and closed, the upper mold 1 is fixedly connected with a plurality of dispensing valves 5 connected with the dispensing holes 103, the dispensing valves 5 control the opening and closing of the dispensing holes 103, and the bottom surface of the upper mold 1 is provided with a receiving groove 104 between the dispensing holes 103 and the upper lip 101, a plurality of baffles 405 are vertically slidably connected in the receiving groove 104, and a plurality of dispensing valves 5 connected with the receiving groove 104 are provided on the top surface of the upper mold 1. The through hole 102 of the upper mold 1, the top surface of the upper mold 1 is fixedly connected with an adjusting platen 401 with an inverted L-shaped cross-section, the top surface of the upper mold 1 is fixedly connected with a plurality of limit seats 403 located below the adjusting platen 401, a control component 402 is arranged on the adjusting platen 401, a movable rod 404 of the control component 402 passes through the limit seat 403 and the through hole 102 to the accommodating groove 104, one end of the movable rod 404 away from the control component 402 is fixedly connected to the baffle block 405, adjacent baffle blocks 405 are arranged in close contact with each other, and the upper mold 1 is fixedly connected with a pull rod 301.

[0025] The control component 402 is a micrometer or a linear motor.

[0026] The front side of the lower mold 2 is integrally formed with a lower lip 201 protruding outward, the top surface of the lower mold 2 is recessed downward to form a slurry distribution cavity 203, the back side of the lower mold 2 is provided with a feed channel 202 connected to the slurry distribution cavity 203, and the back side of the lower mold 2 is fixedly connected with a feed pipe 204 connected to the feed channel 202.

[0027] The use of glass coating die heads has many advantages: first, the transparency of glass allows the flow of slurry inside the die head to be visually observed during the coating process, which greatly facilitates process debugging and research; second, the cost of glass raw materials is much lower than traditional stainless steel raw materials, so the use of glass materials can effectively reduce the production cost of coating die heads; third, glass has a higher hardness than most ordinary stainless steel, which makes the glass die head more wear-resistant and extends its service life; finally, the use of glass die heads reduces the mixing of metal foreign matter (particles) during the coating process, thereby significantly improving the safety performance of the battery.

[0028] In summary, glass coating die heads have shown obvious advantages in improving production efficiency, reducing costs and ensuring product quality.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A glass die head, comprising an upper die (1) and a lower die (2) hingedly connected to each other via a hinge (302), and a gasket arranged between the upper die (1) and the lower die (2), wherein the upper die (1) and the lower die (2) are both made of glass.

2. A glass die head according to claim 1, characterized in that: The glass material is oxide glass or non-oxide glass.

3. A glass die head according to claim 2, characterized in that: The glass material includes silicon dioxide, zirconium dioxide, yttrium oxide, aluminum oxide, and gadolinium oxide.

4. A glass die head according to claim 3, characterized in that: The glass material includes 28 parts of silicon dioxide, 9 parts of zirconium dioxide, 5 parts of yttrium oxide, 39 parts of aluminum oxide, and 19 parts of gadolinium.

5. A glass die head according to claim 4, characterized in that: The glass material includes 28.22% silicon dioxide, 8.75% zirconium dioxide, 4.83% yttrium oxide, 39.43% aluminum oxide, and 18.77% gadolinium oxide.

6. A glass die head according to claim 1, characterized in that: The front side of the upper mold (1) is integrally formed with an upper lip (101) protruding outward, the top surface of the upper mold (1) is provided with a plurality of glue dispensing holes (103) penetrating the upper mold (1), the glue dispensing holes (103) can be opened and closed, and the bottom surface of the upper mold (1) is provided with a receiving groove (104) between the glue dispensing holes (103) and the upper lip (101), a plurality of flow-blocking blocks (405) are vertically slidably connected in the receiving groove (104), adjacent flow-blocking blocks (405) are arranged to fit each other, and the upper mold (1) is fixedly connected with a pull rod (301).

7. A glass die head according to claim 6, characterized in that: The upper mold (1) is fixedly connected to a plurality of glue dispensing valves (5) which are in communication with the glue dispensing holes (103), and the glue dispensing valves (5) control the opening and closing of the glue dispensing holes (103).

8. A glass die head according to claim 7, characterized in that: The top surface of the upper mold (1) is provided with a plurality of through holes (102) connected to the receiving groove (104); the top surface of the upper mold (1) is fixedly connected to an adjusting pressure plate (401) having an inverted L-shaped cross section; the top surface of the upper mold (1) is fixedly connected to a plurality of limit seats (403) located below the adjusting pressure plate (401); a control component (402) is arranged on the adjusting pressure plate (401); a movable rod (404) of the control component (402) passes through the limit seat (403) and the through hole (102) to the receiving groove (104); and one end of the movable rod (404) away from the control component (402) is fixedly connected to a baffle (405).

9. A glass die head according to claim 1, characterized in that: The front surface of the lower mold (2) is integrally formed with a lower lip (201) protruding outward, the top surface of the lower mold (2) is recessed downward to form a slurry distribution cavity (203), the back surface of the lower mold (2) is provided with a feed channel (202) connected to the slurry distribution cavity (203), and the back surface of the lower mold (2) is fixedly connected with a feed pipe (204) connected to the feed channel (202).

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