Coating gasket and coating die head

Abstract

The utility model relates to a coating gasket and a coating die head, the coating gasket comprises a gasket main body, the gasket main body is provided with at least one discharge port, two opposite sides of the discharge port are respectively and detachably provided with a gasket split body, the corners of the opposite sides of the two gasket split bodies are chamfered / milled to be thin, or the edges of the opposite sides of the two gasket split bodies are milled to be thin. According to the utility model, the plurality of gasket split bodies matched with the gasket main body are designed, so that the gasket split bodies can be directly disassembled and gasket split bodies with other structures can be installed without redesigning and processing a new gasket and without changing the gasket main body, and the gasket main body and the gasket split bodies are flexibly matched; corresponding gasket split bodies are selected according to slurry in different states and different coating and thinning requirements, the problem of coating thick edges or unqualified thinning is solved, and the production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery slurry coating technical field especially, relates to a kind of coating gasket and coating die. BACKGROUND

[0002] As a kind of high precision, intelligent, production process stable equipment, slit extrusion coating machine has been widely applied to lithium ion power battery manufacturing field, and there is pressure cavity in extrusion coating machine die, when slurry enters extrusion coating machine from the middle of pressure cavity, slurry is evenly coated on substrate by certain pressure and is dried, and battery is made.Slurry coating is an important link in lithium battery production process, and the quality of coating is related to the quality of subsequent lithium battery performance.

[0003] After slurry is coated on foil, because the exposed area of slurry on side is large, and volatilizes faster, it will dry faster, and under the action of surface tension, slurry forms thick edge phenomenon on side, so it is necessary to carry out thinning treatment when slurry is coated, and the thinning measure at present is to set chamfer at slurry outlet of gasket, so that the width of slurry extruded from die is increased, and then the thickness of slurry on side when coated on foil is thinned, and the thinning effect is determined by the size of chamfer, increasing chamfer can increase the extrusion width of slurry and increase the thinning effect, and reducing chamfer can reduce the extrusion width of slurry and reduce the thinning effect.

[0004] To ensure that the thickness and width of both sides of coated pole piece meet the requirements, designers set thinning value according to product characteristics, and operators measure the thinning value of coating finished product, if the thinning value is greater than the set requirement, a new coating gasket needs to be redesigned and processed, and then old gasket is disassembled, and new gasket is assembled and debugged.However, redesigning and processing a new coating gasket and verifying and testing the size of chamfer of new gasket will undoubtedly greatly reduce the output value of personnel per unit time, and seriously affect production rhythm and efficiency. UTILITY MODEL CONTENTS

[0005] Therefore, in view of the problem that existing gasket chamfer design needs to change the overall design and assembly of new gasket, and seriously affects production rhythm and efficiency, the utility model provides a kind of coating gasket and coating die.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] The utility model discloses a kind of coating gaskets, it includes gasket main body, gasket main body has at least one discharge port, the opposite side of discharge port is detachably installed with gasket split body, the corner of the opposite side of two gasket split bodies is chamfered / milled thin, or the edge of the opposite side of two gasket split bodies is milled thin.

[0008] The utility model discloses design multiple gasket split body matched with gasket main body, can directly detach gasket split body without redesigning processing new gasket, without changing gasket main body, and can install gasket split body of other structure, gasket main body and gasket split body are flexibly collocated, corresponding gasket split body is selected for different state slurry and different coating thinning demand, solve coating thick edge or thinning unqualified problem, greatly improve production efficiency.

[0009] As a further improvement of the above-mentioned scheme of the utility model, two L-shaped extensions are formed on one side of the gasket main body, the two L-shaped extensions are symmetrically arranged about the central axis of the gasket main body, and the two L-shaped extensions are formed with the discharge port between the opposite ends. The opposite ends of the two L-shaped extensions are provided with notches on the side away from the gasket main body. The shape of the notches is matched with the shape of the gasket split body. The two gasket split bodies are arranged in the two notches respectively and are detachably connected with the gasket main body.

[0010] As a further improvement of the above-mentioned scheme of the utility model, a plurality of clamping grooves are formed on the gasket main body and are communicated with the notches. A plurality of clamping strips are formed on the gasket split body and are matched with the clamping grooves. The plurality of clamping strips are clamped in the plurality of clamping grooves respectively.

[0011] As a further improvement of the above-mentioned scheme of the utility model, the clamping grooves have a convex section.

[0012] As a further improvement of the above-mentioned scheme of the utility model, positioning holes are formed on the gasket split body. The gasket split body is fixed with the coating die by the positioning holes to prevent loosening of the gasket split body during coating.

[0013] As a further improvement of the above-mentioned scheme of the utility model, the thickness of the gasket main body and the gasket split body is consistent.

[0014] As a further improvement of the above-mentioned scheme of the utility model, the gasket main body and the gasket split body are made of stainless steel.

[0015] The utility model also proposes a kind of coating die, it includes coating gasket, the coating gasket adopts the coating gasket as described above.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1.The utility model discloses a plurality of gasket subparts matched with the gasket main body, which can be directly disassembled and installed with other gasket subparts without redesigning and processing new gaskets and changing the gasket main body, and the gasket main body and the gasket subparts can be flexibly matched, the corresponding gasket subpart is selected according to different slurry states and different coating thinning requirements, the problem of unqualified coating thick edges or thinning is solved, and the production efficiency is greatly improved.

[0018] 2.The utility model discloses a combined design, compared with the conventional gasket, when the chamfer and the coating width are replaced, the gasket whole does not need to be redone, only the small volume gasket subpart needs to be replaced, the gasket processing period and the material cost are saved, and the utility model is suitable for the small capacity equipment of the type of frequent replacement. DRAWINGS

[0019] Figure 1 A structure diagram of a coating gasket is provided for the utility model embodiment.

[0020] Figure 2 A structure diagram of a gasket main body in a coating gasket is provided for the utility model embodiment.

[0021] Figure 3 A structure diagram of a gasket subpart in a coating gasket is provided for the utility model embodiment.

[0022] Figure 4 A structure diagram of another gasket subpart in a coating gasket is provided for the utility model embodiment.

[0023] Figure 5 A structure diagram of another gasket subpart in a coating gasket is provided for the utility model embodiment.

[0024] Figure 6 A structure diagram of another gasket subpart in a coating gasket is provided for the utility model embodiment.

[0025] Reference signs: 1, gasket main body; 101, discharge port; 102, L-shaped extension; 103, notch; 104, clamping groove; 2, gasket subpart; 201, clamping strip; 202, positioning hole; 203, C chamfer; 204, edge thinning area; 205, R chamfer; 206, right-angle thinning area. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the utility model, the utility model will be more comprehensively described below in combination with specific embodiments. However, the utility model can be realized in many different forms, and is not limited to the embodiments described in the present text. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0027] 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 in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0028] With reference to Figure 1 , the embodiment provides a coating gasket, which comprises a gasket body 1 and two gasket parts 2.

[0029] In combination Figure 2 , one side of the gasket body 1 of the embodiment is integrally formed with two L-shaped extension parts 102, the two L-shaped extension parts 102 are symmetrically arranged about the central axis of the gasket body 1, and a discharge port 101 is formed between the opposite ends of the two L-shaped extension parts 102. Of course, in other embodiments, more than two L-shaped extension parts 102 can also be formed on the gasket body 1, thereby forming two or more discharge ports 101. The opposite ends of the two L-shaped extension parts 102 are away from the side of the gasket body 1 and are each provided with a notch 103. A plurality of clamping grooves 104 are also formed in the gasket body 1 and communicate with the notches 103. The number and size of the clamping grooves 104 can be reasonably designed according to the size of the gasket body 1. A plurality of mounting holes are formed in the gasket body 1 for mounting, and the gasket body 1 is made of stainless steel as a whole.

[0030] In the embodiment, the number of gasket parts 2 is designed according to the discharge port 101 of the gasket body 1, that is, two gasket parts 2 are needed for one discharge port 101. The shape of the gasket part 2 is adapted to the shape of the notch 103 on the gasket body 1, and the two gasket parts 2 are arranged in the two notches 103, respectively. A plurality of clamping strips 201 are integrally formed on the gasket part 2 and are adapted to the clamping grooves 104. When the gasket part 2 is installed, it is clamped into the notch 103 from top to bottom, and the plurality of clamping strips 201 are correspondingly clamped into the plurality of clamping grooves 104. The embodiment provides four kinds of gasket body 1: in combination Figure 3 , one corner of the first gasket part 2 away from the clamping strip 201 is formed with a C chamfer 203, the angle of the C chamfer 203 can be designed according to the thinning process required, so as to adjust the thinning amount of the discharge port 101, the first gasket part 2 has stable thinning effect edge and is not easy to produce wavy edge, but the thinning amount is small; in combination Figure 4, the second gasket part 2 is milled thin on the side edge away from the clamping strip 201, thereby forming an edge thinning area 204, the second gasket part 2 can control the edge thinning area, is suitable for a process requiring a relatively large thinning width, but the thickness reservation is not easy to cause a wavy edge and has an influence on the coating width size, and multiple tests may be required, the thinning width is controlled to be 2-3mm, the thinning area length is controlled to be 11-12mm, and the thinning thickness is generally half of the thickness of the gasket body by default, and reasonable design is performed according to specific conditions; in combination with Figure 5 , the third gasket part 2 forms an R chamfer 205 on one corner away from the clamping strip 201, the third gasket part 2 has a large oblique line thinning amount, is the widest in all styles of gaskets, has obvious thinning effect, can solve the thick edge contraction phenomenon at the 2mm edge, but the edge is not straight, the coating width is easy to change with the change of slurry viscosity, and the coating width size is difficult to control, and the coating process is not suitable for precise coating width requirements; in combination with Figure 6 , the fourth gasket part 2 is milled thin on one corner away from the clamping strip 201, thereby forming a right-angle thinning area 206, the fourth gasket part 2 can realize a process with a relatively small edge effect area, the thickness can be maximized to be flat with the gasket body, the edge thinning effect is very obvious, but the thinning amount width is relatively small, and the edge is easy to have accumulated material and a virtual edge, the size of the right-angle thinning area 206 is generally (2-4)mm*(1-3)mm, and the thinning thickness is half of the thickness of the gasket body by default. In the embodiment, the thickness of the gasket part 2 is consistent with the thickness of the gasket body 1, and the positioning holes 202 are formed through the four kinds of gasket parts 2, and the hole diameter of the positioning holes 202 needs to be reasonably designed according to the size of the gasket part 2. The gasket part 2 is made of stainless steel.

[0031] The coating gasket with the above structure is used in a coating die, the coating gasket is installed between the upper die and the lower die, the gasket body 1 is fixed through the installation hole, and the gasket part 2 is fixed on the upper die and the lower die through the positioning hole 202, so that loosening in the coating process is prevented. When different slurry and different thinning amount coating requirements are met, the gasket part 2 can be directly disassembled, and the gasket part 2 with other structures can be installed, the gasket body 1 and the gasket part 2 are flexibly matched, the corresponding gasket part 2 is selected according to different state slurry and different coating thinning requirements, the coating thick edge or thinning unqualified problem can be solved without re-designing and processing a new gasket, and the production efficiency is greatly improved.

[0032] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. When a component is referred to as being "fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0033] 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 in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0034] Various technical features of the embodiments described above can be combined in any combination, and to make the description concise, not all possible combinations are described, but it should be understood that the application embraces all such possible combinations. It will be apparent that various embodiments of the application can be practiced without necessarily being limited to any particular embodiment.

[0035] The above-described embodiments are merely illustrative of the present application and do not limit the scope of the application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which should be considered as falling within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. A coated gasket, characterized by, It includes a gasket body (1), the gasket body (1) has at least one discharge port (101), the opposite sides of the discharge port (101) are detachably mounted with gasket parts (2), the corner of the opposite side of the two gasket parts (2) is chamfered / milled thin, or the edge of the opposite side of the two gasket parts (2) is milled thin.

2. The coated gasket of claim 1, wherein, Two L-shaped extensions (102) are formed on one side of the gasket body (1), the two L-shaped extensions (102) are symmetrically arranged about the central axis of the gasket body (1), and the discharge port (101) is formed between the opposite ends of the two L-shaped extensions (102), the opposite ends of the two L-shaped extensions (102) are away from one side of the gasket body (1), and the opposite ends of the two L-shaped extensions (102) are provided with notches (103), the shape of the notches (103) is matched with the shape of the gasket parts (2), the two gasket parts (2) are arranged in the two notches (103) respectively and are detachably connected with the gasket body (1).

3. The coated gasket of claim 2, wherein, A plurality of clamping grooves (104) are formed on the gasket body (1) and are communicated with the notches (103), a plurality of clamping strips (201) are formed on the gasket parts (2) and are matched with the clamping grooves (104), and the plurality of clamping strips (201) are clamped in the plurality of clamping grooves (104) respectively.

4. The coated gasket of claim 3, wherein, The clamping grooves (104) have a convex section.

5. The coated gasket of claim 1, wherein, Positioning holes (202) are formed on the gasket parts (2).

6. The coated gasket of claim 1, wherein, The thickness of the gasket body (1) and the gasket parts (2) is consistent.

7. The coated gasket of claim 1, wherein, The gasket body (1) and the gasket parts (2) are made of stainless steel.

8. A coating die comprising a coating shim, characterized by, The coating gasket adopts the coating gasket according to any one of claims 1-7. The coating gasket adopts the coating gasket according to any one of claims 1-7.

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