Oil removal structure applied to production casting section of lithium battery diaphragm

Abstract

The invention relates to an oil removal structure applied to a lithium battery diaphragm production casting section, the oil removal structure comprises an air knife and an oil removal baffle plate, the air knife is in a closed straight pipe shape, the length of the air knife is greater than or equal to the width of a diaphragm, and the bottom surface of the air knife is provided with an air nozzle; the air knife is connected with a cross beam on the production line through a connecting piece, is positioned behind an oil removing roller and above a chilling roller on the production line, and enables the air nozzle to face the roller surface of the chilling roller; the air knife is connected with external compressed air through a pipeline, so that the compressed air flows out from the air nozzle and blows the roller surface of the chilling roller; the oil removal baffle is connected with the connecting piece, located on the other side, opposite to the oil removal roller, of the air knife and can shield oil dirt blown by the air knife. According to the invention, the oil removal effect can be effectively improved, oil stains can be prevented from being splashed on the membrane surface of the diaphragm, the pollution to the environment is reduced, and favorable conditions are created for improving the product quality.

Description

Technical Field

[0001] The invention relates to a tooling structure, in particular to a tooling structure used in the production of lithium battery diaphragms, and specifically to an oil removal structure used in a casting section of the production of lithium battery diaphragms. Background Art

[0002] Casting is an indispensable process in the production of lithium battery diaphragms. In the production process of wet-process diaphragms, the degreasing effect of the roller surface in the casting section is of paramount importance to the product quality. During production, the extruder melts to the chilled roller in the casting section to form a diaphragm sheet. At the same time, the paraffin oil on the surface of the sheet will precipitate on the chilled roller, causing contamination to subsequent sheets and affecting product quality. At present, contact extrusion degreasing is mainly carried out by pressing the degreasing roller onto the chilled roller, that is, the paraffin oil is concentrated between the two rollers by extrusion, and then the accumulated oil between the two rollers is blown through an air nozzle, and the paraffin oil is blown to the drive side of the chilled roller. Finally, the accumulated oil flows from the side of the chilled roller to the oil collection tank. However, this method has the following problems: 1. Contact extrusion degreasing by pressing the degreasing roller onto the chilled roller may result in incomplete degreasing and affect the degreasing effect; 2. During the purging process, paraffin oil splashes everywhere, which can easily cause environmental pollution and splash onto the membrane surface, causing product appearance defects.

[0003] Therefore, it is urgently needed to be improved in order to better meet the needs of production. Summary of the invention

[0004] The purpose of the present invention is to address the problems currently encountered in the deoiling operation of the cast section in the production of lithium battery diaphragms, and to provide an deoiling structure applied to the cast section in the production of lithium battery diaphragms, which can effectively improve the deoiling effect and prevent oil stains from splashing onto the membrane surface of the diaphragm, thereby reducing pollution to the environment and creating favorable conditions for improving product quality.

[0005] The technical solution of the present invention is: A deoiling structure applied to the cast section of lithium battery diaphragm production, comprising a wind knife and a deoiling baffle, wherein the wind knife is in the shape of a closed straight tube, whose length is greater than or equal to the width of the diaphragm, and whose bottom surface is provided with a wind nozzle; the wind knife is connected to the crossbeam on the production line through a connecting piece, and is located behind the deoiling roller and above the chilling roller on the production line, and the wind nozzle is directed toward the roller surface of the chilling roller; the wind knife is connected to external compressed air through a pipeline, so that compressed air can flow out from the wind nozzle and sweep the roller surface of the chilling roller to reduce the amount of oil accumulated on the roller surface of the chilling roller; the deoiling baffle is a long strip plate, which is arranged on the other side of the wind knife relative to the deoiling roller, its upper end is connected to the connecting piece, and its lower end is located below the wind knife and bent toward the wind knife. Furthermore, the cross-section of the wind knife is polygonal, the upper part of which is rectangular and the lower part is a triangle protruding downward; the wind nozzle is slit-shaped and is arranged at the sharp corner of the triangle along the length direction of the wind knife, and its length is the same as that of the wind knife.

[0006] Furthermore, an air inlet is provided on the top of the wind knife, which is connected to external compressed air through a pipeline.

[0007] Furthermore, the connecting member includes a connecting plate; the connecting plate is a vertical short plate with a circular mounting hole at its upper end, which can be connected to the crossbeam by passing screws through the mounting hole; a vertical long hole-shaped adjustment hole is provided in the middle of the connecting plate, and the ear on the wind knife can be connected to the adjustment hole by screws.

[0008] Furthermore, there are two or more connecting plates, which are evenly arranged along the length direction of the wind knife.

[0009] Furthermore, the connecting member also includes a supporting arm; the supporting arm is in the shape of a straight rod, which is arranged between the connecting plates, and its end is connected to the connecting plates.

[0010] Furthermore, there are two support arms, which are evenly distributed and parallel to each other.

[0011] Furthermore, the cross-section of the oil removal baffle is in the shape of a "]", including a top plate, a bottom plate and a side plate; a connecting block is provided at the end edge of the top plate; a connecting hole is provided on the connecting block so that a screw can be passed through the connecting hole and connected to the adjustment hole so that its opening faces the wind knife.

[0012] Furthermore, the bottom plate is in the shape of an upward curved hook; the angle of the curved hook is 80°±20°.

[0013] Furthermore, the side plate is 10 cm away from the wind knife; the end edge of the bottom plate is 3 cm away from the chilled roller.

[0014] Beneficial effects of the present invention: The invention has reasonable design, simple structure and convenient use. By installing and adjusting the position of the wind knife, the compressed air introduced into the wind knife flows out from the wind nozzle of the wind knife, and strongly blows the surface of the chilled roller facing the degreasing roller, thereby reducing the amount of oil accumulated on the roller surface of the chilled roller and improving the degreasing effect of the subsequent degreasing roller. At the same time, by installing and adjusting the position of the degreasing baffle, the accumulated oil blown by the wind knife can be effectively shielded, avoiding pollution of the environment and the diaphragm surface, and creating favorable conditions for improving the quality of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is an exploded schematic diagram of the present invention.

[0017] Figure 3 It is a schematic diagram of the use status of the present invention.

[0018] Among them, 1- wind knife; 101- air nozzle; 102- air inlet; 103- ear; 2- connecting piece; 201- mounting hole; 202- connecting plate; 203- adjusting hole; 204- supporting arm; 3- oil removal baffle; 301- connecting block; 4- crossbeam; 5- oil removal roller; 6- chilling roller; a- angle of the hook. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figures 1 to 3 shown.

[0021] The invention discloses an oil removal structure for a casting section used in the production of lithium battery diaphragms, comprising an air knife 1, a connecting piece 2, an oil removal baffle 3 and the like.

[0022] The wind knife 1 is a closed straight tube and can be made of stainless steel. Its cross section is pentagonal, and its upper part is rectangular, and the lower part is a downwardly protruding triangle, and a slit-shaped wind nozzle 101 is provided at the sharp corner of the triangle. The length of the wind knife 1 is greater than or equal to the width of the diaphragm. The wind nozzle 101 is arranged along the length direction of the wind knife 1, and its length is the same as that of the wind knife, ensuring that it can cover the width of the diaphragm and ensure performance. At the same time. The width of the wind nozzle is about 3mm, which fully meets the air outlet requirements.

[0023] The top of the wind knife 1 is provided with an air inlet 102, and is connected to external compressed air through a pipeline, so that the compressed air entering the wind knife flows out from the air nozzle to form a strong blowing force. The top of the wind knife 1 is provided with a hanging ear 102, which can be connected to the connecting piece 2, so that the wind knife is installed behind the degreasing roller 5 of the production line and above the chilling roller 6, and the air nozzle 101 is directed toward the roller surface of the chilling roller 6, so as to blow the accumulated oil on the roller surface of the chilling roller, reduce the amount of accumulated oil, and create favorable conditions for improving the degreasing effect of the subsequent degreasing roller on the surface of the chilling roller.

[0024] The connecting member 2 includes a connecting plate 202 and a support arm 204. The connecting plate 202 is in the shape of a vertical short plate, and a circular mounting hole 201 is provided at its upper end, and can be connected to the crossbeam 4 by screws penetrating the mounting hole. At the same time, a vertical long hole-shaped adjustment hole 203 is provided in the middle of the connecting plate 202, and the ear 102 on the wind knife 1 can be connected to the adjustment hole 203 by screws, so that the wind knife 1 is stably suspended on the crossbeam 4, and the position of the ear on the adjustment hole can be adjusted to make the distance between the wind nozzle and the roller surface of the chilling roller be 1-10 cm, so as to ensure that the oil stains on the roller surface of the chilling roller are effectively blown away. Preferably, there are two connecting plates 202, which are evenly arranged along the length direction of the wind knife 1 to improve the stability of the connection.

[0025] The support arm 204 is in the shape of a straight rod, disposed between the connecting plates 202, and its end is connected to the connecting plate 202, which can enhance the strength of the connector 2. Preferably, there are two support arms 204, which are evenly distributed and parallel to each other, further enhancing the connection strength.

[0026] The de-oiling baffle 3 is a long strip plate with a "]"-shaped cross section, including a top plate, a bottom plate and a side plate. A connecting block 301 is provided at the end edge of the top plate, and a connecting hole is provided on the connecting block. A screw can be passed through the connecting hole and connected to the adjusting hole 203 to fix the de-oiling baffle 3 on the other side of the wind knife 1 relative to the de-oiling roller, and its opening faces the wind knife. At the same time, the bottom plate is located under the wind knife 1. In this way, the oil droplets raised when the wind knife blows can be shielded, which not only ensures the cleanliness of the environment, but also prevents the oil droplets from splashing onto the diaphragm, thereby ensuring the quality rate of the product.

[0027] Furthermore, the bottom plate of the oil removal baffle 3 is in the shape of an upward hook, and the angle a of the hook is 80°±20°. Moreover, the side plate of the oil removal baffle 3 is about 10 cm away from the wind knife, and by adjusting the position of the connecting block, the end edge of the bottom plate is about 3 cm away from the roller surface of the chill roller 6, so as to fully and effectively play its shielding role and create favorable conditions for improving product quality.

[0028] During the normal production process of the diaphragm, compressed air is input into the wind knife and flows out from the wind nozzle to sweep the surface of the chilled roller, reducing the amount of oil accumulated on the surface of the chilled roller and effectively improving the degreasing effect of the subsequent degreasing roller on the chilled roller. As a result, the thickness difference of the cast sheet and the thickness difference of the finished diaphragm can be greatly reduced, and the quality of the wide-width diaphragm products can be improved. Moreover, the cleanliness of the chilled roller surface can be effectively improved by sweeping the wind knife, which greatly improves the grayscale difference and thin point defects, and greatly improves the product quality rate.

[0029] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. An oil removal structure used in the casting section of lithium battery diaphragm production, comprising an air knife and an oil removal baffle, characterized in that: The wind knife is in the shape of a closed straight tube, whose length is greater than or equal to the width of the diaphragm, and a wind nozzle is provided on its bottom surface; the wind knife is connected to the crossbeam on the production line through a connecting piece, and is located behind the oil removal roller and above the chill roller on the production line, with the wind nozzle facing the roller surface of the chill roller; the wind knife is connected to external compressed air through a pipeline, so that compressed air can flow out from the wind nozzle and blow the roller surface of the chill roller to reduce the amount of oil accumulated on the roller surface of the chill roller; the oil removal baffle is a long strip plate, which is arranged on the other side of the wind knife relative to the oil removal roller, its upper end is connected to the connecting piece, and its lower end is located below the wind knife and bent toward the wind knife.

2. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 1 is characterized in that: The cross section of the wind knife is polygonal, the upper part of which is rectangular and the lower part is a triangle protruding downward; the wind nozzle is slit-shaped and is arranged at the sharp corner of the triangle along the length direction of the wind knife, and its length is the same as that of the wind knife.

3. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 1 is characterized in that: An air inlet is arranged on the top of the wind knife, which is connected to external compressed air through a pipeline.

4. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 1 is characterized in that: The connecting member includes a connecting plate; the connecting plate is in the shape of a vertical short plate, and a circular mounting hole is provided at the upper end thereof, and screws can be used to penetrate the mounting hole to connect with the crossbeam; a vertical long hole-shaped adjustment hole is provided in the middle of the connecting plate, and screws can be used to connect the ear on the wind knife to the adjustment hole.

5. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 4 is characterized in that: There are two or more connecting plates, which are evenly arranged along the length direction of the wind knife.

6. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 4 is characterized in that: The connecting member also includes a supporting arm; the supporting arm is in the shape of a straight rod, arranged between the connecting plates, and an end portion thereof is connected to the connecting plates.

7. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 6 is characterized in that: There are two support arms, which are evenly distributed and parallel to each other.

8. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 1 is characterized in that: The cross-section of the oil removal baffle is in the shape of "]", and includes a top plate, a bottom plate and a side plate; a connecting block is provided at the end edge of the top plate; a connecting hole is provided on the connecting block so that a screw can be passed through the connecting hole and connected to the adjusting hole so that its opening faces the wind knife.

9. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 8, characterized in that: The bottom plate is in the shape of an upward curved hook; the included angle of the curved hook is 80°±20°.

10. The oil removal structure for the casting section of lithium battery diaphragm production according to claim 8, characterized in that: The distance between the side plate and the wind knife is 10 cm; the distance between the end edge of the bottom plate and the chilling roller is 3 cm.

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