Device and method for replacing and positioning scraper of coating machine, material box and coating machine

Abstract

The invention discloses a coating machine scraper replacing and positioning device and method, a diaphragm coating machine material box and a diaphragm coater, the coating machine scraper replacing and positioning device comprises an L-shaped positioning plate, the L-shaped positioning plate is provided with an L-shaped space, and the L-shaped positioning plate comprises a back plate and a bottom plate which extend in the length direction of a scraper; the back plate and the bottom plate are vertically connected together to form an L-shaped structure, and the distance between the upper surface of the bottom plate and the top of the back plate is smaller than the width of the scraper. During installation, the back face of the scraper is attached to a back plate of the L-shaped positioning plate, an unworn blade of the scraper faces downwards and makes contact with a bottom plate of the L-shaped positioning plate, the upper portion of the scraper protrudes out of the top of the back plate and is located between the material box and the scraper upper pressing plate, and after the scraper is fixed to the material box, the L-shaped positioning plate is pulled out, and replacement of the scraper is completed. The fit width of the scraper and the back plate of the L-shaped scraper positioning plate is the width of the scraper extending out of the material box fixing plate, and it is guaranteed that the distances between the scraper and the film surface are equal after replacement.

Description

Technical Field

[0001] The invention relates to a coating machine scraper replacement positioning device and method, as well as a diaphragm coating machine material box and a diaphragm coating machine, belonging to the technical field of battery diaphragm production equipment. Background Art

[0002] At present, in the process of producing coated diaphragms, plate roller coating is a very critical step. During coating, the scraper contacts the plate roller in coordination. On the one hand, it scrapes off the excess slurry on the plate roller. On the other hand, it is necessary to ensure that the roller surface is evenly loaded with material after the plate roller scrapes off the excess slurry, without uneven material hanging. The production line runs at a high speed. After the scraper is worn for a period of time, uneven material hanging on the plate roller will occur, resulting in defects such as missing coating, horizontal lines, scratches, and uneven coating on the film surface, and the scraper needs to be replaced.

[0003] The material box of the prior art roll coating mechanism has an upper scraper and a lower scraper. The scraper usually has blades at both ends. When the blade at one end is worn, the scraper should be flipped upside down in theory to use the unworn blade for production. However, since the worn ends of the scraper have different degrees of wear and the notches are large and small, and the ports are not in a straight line, the installation position of the scraper needs to be manually adjusted during installation so that the unworn blade and the film surface reach a specified distance.

[0004] Since there are strict requirements on the extension size of the scraper blade (i.e. the distance between the blade and the membrane surface) during production, it takes a lot of time to manually flip the scraper to install and position the scraper, and manual flipping cannot ensure that the length of the blade extension is consistent each time. In order to save time and prevent long downtime, the scraper with one side worn is often discarded and directly replaced with a new scraper. However, the cost of the scraper is high, which means that the scraper with one side worn cannot be reused, resulting in waste and increased production costs. Therefore, there is an urgent need for a device that can quickly position and install a scraper with one side worn when producing lithium battery coating diaphragms to achieve the reuse of the scraper. Summary of the invention

[0005] The purpose of the present invention is to provide a coating machine scraper replacement and positioning device that can make the blades on both sides of the scraper usable, so as to solve the technical problem of the prior art that it is time-consuming and laborious to manually install and position a scraper that is worn on one side. At the same time, the present invention also provides a diaphragm coating machine material box, a diaphragm coating machine, and a diaphragm coating machine material box scraper replacement and positioning method that are compatible with the coating machine scraper replacement and positioning device.

[0006] The coating machine scraper replacement and positioning device of the present invention adopts the following technical scheme: a coating machine scraper replacement and positioning device, which includes an L-shaped positioning plate, the L-shaped positioning plate has an L-shaped space for supporting the scraper, the L-shaped positioning plate includes a back plate and a bottom plate extending along the length direction of the scraper, the back plate and the bottom plate are vertically connected together to form an L-shaped structure, and the distance between the upper surface of the bottom plate and the top of the back plate is less than the width of the scraper.

[0007] The bottom plate is provided with a positioning notch.

[0008] The positioning notch is arranged in the middle of the bottom plate.

[0009] The L-shaped positioning plate is connected with an auxiliary support rod, and the back side of the auxiliary support rod is used to fit on the plane in the plate roller groove of the material box.

[0010] The auxiliary support rod is fixedly connected to the back plate.

[0011] There are two auxiliary support rods, and the two auxiliary support rods are arranged at intervals.

[0012] The back plate and the bottom plate are connected together as one body; the lengths of the back plate and the bottom plate are equal; the length of the L-shaped positioning plate is less than or equal to the length of the scraper.

[0013] The material box of the diaphragm coater of the present invention adopts the following technical scheme: a material box of the diaphragm coater, comprising a material box, wherein the material box has an inner cavity for storing slurry, a plate roller groove is provided on the material box near the gravure roller, and the positions above and below the plate roller groove on the material box are respectively used to install a scraper, and the plate roller groove is respectively provided with two mutually parallel grooves at positions above and below the scraper, each groove comprising a supporting surface and a positioning surface perpendicular to each other, the supporting surface is parallel to the scraper, and the positioning surface is perpendicular to the scraper.

[0014] A supporting boss is arranged in the plate roller groove, and a surface of the supporting boss close to the gravure roller is a plane, and the plane is parallel to the supporting surface.

[0015] The diaphragm coater of the present invention comprises the diaphragm coater cartridge described above.

[0016] The present invention adopts the following technical scheme: a method for replacing and positioning the scraper of a material box of a diaphragm coater, using the above-mentioned L-shaped positioning plate and material box to replace and position the scraper, which includes the following steps: (1) rotating the material box 90 degrees and placing it in a horizontal position; (2) placing the L-shaped positioning plate on the material box so that the upper part of the back plate is located in a groove on the material box close to the scraper installation position, the upper end of the back plate abuts against the positioning surface of the groove, and the upper part of the back of the back plate abuts against the supporting surface of the groove, and the L-shaped positioning plate is positioned on the material box; (3) placing the scraper on the L-shaped positioning plate; The scraper is placed in the L-shaped space of the plate with the worn blade facing upwards and the unworn blade facing downwards in contact with the bottom plate of the L-shaped positioning plate. The back of the scraper is attached to the back plate of the L-shaped positioning plate. The upper part of the scraper protrudes from the top of the back plate 1 and is located between the material box and the scraper upper pressure plate; (4) Tighten the fastening bolts to fix the scraper on the material box to complete the positioning and fastening of the scraper; (5) Remove the L-shaped positioning plate, rotate the material box 90° and place it in a vertical position so that the material box is placed in the normal operating position of the equipment. The scraper on the material box is in close contact with the gravure roller, thus completing the replacement of the upper and lower blades of the scraper.

[0017] In the step (2), the auxiliary support rod of the L-shaped positioning plate is attached to the plane of the supporting boss in the plate roller groove.

[0018] The beneficial effect of the present invention is: when using the present invention to install a scraper with one side worn, the L-shaped positioning plate is placed on the material box so that the upper part of the back plate is located in the groove on the material box close to the scraper installation position, the upper end of the back plate is against the positioning surface of the groove, and the upper part of the back of the back plate is against the supporting surface of the groove, and then the scraper is placed in the L-shaped space of the L-shaped positioning plate, with the worn blade of the scraper facing upward, the back of the scraper fits on the back plate of the L-shaped positioning plate, and the unworn blade of the scraper faces downward in contact with the bottom plate of the L-shaped positioning plate, the upper part of the scraper protrudes from the top of the back plate and is located between the material box and the scraper upper pressure plate, and then the fastening bolts are tightened to fix the scraper on the material box. After completing the positioning and fastening of the scraper, the L-shaped positioning plate is removed, and the replacement of the upper and lower blades of the scraper is completed. The scraper is on the L-shaped positioning plate, and the unworn blade of the scraper is in contact with the bottom plate of the L-shaped positioning plate to ensure that the unworn end of the scraper blade is in a straight line. The width of the scraper and the back plate of the L-shaped scraper positioning plate is the width of the scraper extending out of the material box fixing plate. This ensures that the distance between the scraper and the film surface is equal after each replacement of the scraper.

[0019] The L-shaped positioning plate of the present invention can realize the rapid positioning and installation of the scraper, and each scraper can be used twice. Under the condition of not affecting the stable operation of the equipment and increasing the difficulty of operation, the scraper cost is reduced by 50%. The present invention provides a strong guarantee for reducing costs and increasing efficiency in production and saving costs, and has important practical production significance.

[0020] Preferably, since the scraper is generally long and relatively soft, the unworn blade of the scraper may not fit properly with the bottom plate. At this time, press the scraper with your thumb at the positioning notch of the bottom plate and move the scraper toward the bottom plate so that the unworn end of the scraper blade fits properly with the bottom plate without a gap. At this time, the scraper position can be ensured not to shift, and the unworn end of the scraper blade can be ensured to be in a straight line.

[0021] Preferably, an auxiliary support rod is connected to the L-shaped positioning plate, and the back side of the auxiliary support rod is used to fit with the plane in the middle of the inner cavity of the material box. When the back plate of the L-shaped positioning plate is positioned in the groove on the material box, the back side of the auxiliary support rod fits with the plane in the middle of the inner cavity of the material box. This makes the supporting positioning of the L-shaped positioning plate more stable and prevents the L-shaped positioning plate from shaking, which causes inaccurate positioning of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a quick replacement positioning device for a scraper of a battery separator coating machine according to an embodiment of the present invention; Figure 2 The upper scraper is placed on Figure 3 Schematic diagram on the L-shaped positioning plate; Figure 3 yes Figure 2 A partial enlarged view of Figure 4 yes Figure 2 Side view of Figure 5 is a schematic diagram of a diaphragm coating machine material box according to an embodiment of the present invention; Figure 6 yes Figure 5 Schematic diagram of the material box when replacing the upper scraper; Figure 7 yes Figure 6 Side view of Figure 8 yes Figure 6 A partial enlarged view of Fig. 9 yes Figure 7 Schematic diagram after removing the upper scraper; Fig.10 yes Figure 8 Schematic diagram after removing the upper scraper; Fig.11 Schematic diagram of a diaphragm coating machine according to an embodiment of the present invention.

[0023] In the figure: 1-back plate, 2-bottom plate, 3-gravure roller, 4-upper scraper, 5-L-shaped positioning plate, 6-scraper lower pressure plate, 7-feeding tube, 8-fastening bolt, 9-lower scraper, 10-positioning notch, 12-return tube, 13-scraper upper pressure plate, 14-material box, 15-auxiliary support rod, 16-plane, 17-support surface of groove, 18-positioning surface of groove. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] An embodiment of the coating machine scraper replacement positioning device of the present invention is as follows: Figures 1 to 4 As shown, the battery diaphragm coating machine material box scraper quick replacement positioning device of this embodiment includes an L-shaped positioning plate 5, and the L-shaped positioning plate 5 has an L-shaped space for supporting the scraper. The L-shaped positioning plate 5 includes a back plate 1 and a bottom plate 2 extending along the length direction of the scraper. The back plate 1 and the bottom plate 2 are vertically connected together to form an L-shaped structure, and the distance H between the upper surface of the bottom plate 2 and the top of the back plate 1 is less than the width W of the scraper. The back plate 1 and the bottom plate 2 are respectively used to support one side and the unworn blade of the upper scraper 4 or the lower scraper 9, and the back plate 1 and the bottom plate 2 are integrally connected together. The lengths of the back plate 1 and the bottom plate 2 are equal. The length of the L-shaped positioning plate 5 is less than the length of the upper scraper 4 or the lower scraper 9. In other embodiments, the L-shaped positioning plate 5 may also be equal to the length of the upper scraper 4 or the lower scraper 9.

[0026] The bottom plate 2 is provided with a positioning notch 10 , and the positioning notch 10 is opened in the middle of the bottom plate 2 .

[0027] The L-shaped positioning plate is connected with an auxiliary support rod 15, which is fixedly connected to the back plate. There are two auxiliary support rods 15, which are arranged at intervals. The back of the auxiliary support rod 15 is attached to the plane in the middle of the inner cavity of the material box 14.

[0028] The embodiment of the diaphragm coating machine of the present invention is as follows Figures 5 to 10As shown, the material box of the diaphragm coating machine of this embodiment includes a material box 14, and the material box 14 has an inner cavity for storing slurry. The material box 14 is provided with a plate roller groove near the gravure roller 3. The positions above and below the plate roller groove on the material box 14 are respectively used to install the upper scraper 4 and the lower scraper 9. The plate roller groove is provided with two mutually parallel grooves near the upper and lower positions of the scraper. Each groove includes a mutually perpendicular support surface 17 and a positioning surface 18. The support surface 17 is parallel to the upper scraper 4 and the lower scraper 9, and the positioning surface 18 is perpendicular to the upper scraper 4 and the lower scraper 9. The positioning surface 18 is used to fit with the upper end surface of the back plate 1 of the L-shaped positioning plate 5 to position the upper end surface of the back plate 1; the support surface 17 is used to fit with the back of the back plate 1 of the L-shaped positioning plate 5 to support the upper back of the back plate 1. A supporting boss is provided in the plate roller groove, and the side of the supporting boss close to the gravure roller is a plane 16, and the plane 16 is parallel to the support surface 17. The flat surface 16 is used to support the back side of the auxiliary support rod 15 .

[0029] The embodiment of the diaphragm coating machine of the present invention is as follows Fig.11 As shown, the membrane coating machine of this embodiment includes a material box 14 and a gravure roller 3. The structure of the material box is as follows Figures 5 to 10 As shown, the material box 14 has an inner cavity for storing slurry, and a plate roller groove is provided near the gravure roller 3 on the material box 14. The positions above and below the plate roller groove on the material box 14 are used to install the upper scraper 4 and the lower scraper 9 respectively. A groove is provided above the plate roller groove, and the groove includes a supporting surface 17 and a positioning surface 18 perpendicular to each other. The supporting surface 17 is parallel to the upper scraper 4 and the lower scraper 9, and the positioning surface 18 is perpendicular to the upper scraper 4 and the lower scraper 9. The positioning surface 18 is used to fit with the upper end surface of the back plate 1 of the L-shaped positioning plate 5 to position the upper end surface of the back plate 1; the supporting surface 17 is used to fit with the back of the back plate 1 of the L-shaped positioning plate 5 to support the upper back of the back plate 1. A supporting boss is provided in the plate roller groove, and the side of the supporting boss close to the gravure roller is a plane 16, and the plane 16 is parallel to the supporting surface 17. The plane 16 is used to support the back of the auxiliary support rod 15.

[0030] The upper scraper 4 is fixed to the material box 14 by the scraper upper pressure plate 13 and the fastening bolts 8, and the lower scraper 9 is fixed to the material box 14 by the scraper lower pressure plate 6 and the fastening bolts 8. When the equipment is running, the feeding pipe 7 feeds into the material box 14, and the excess slurry flows back to the material tank through the return pipe 12. The gravure roller 3 is closely matched with the upper scraper 4 and the lower scraper 9 fastened to the material box 14. When the gravure roller 3 rotates, the upper scraper 4 scrapes off the excess slurry of the gravure roller 3, and the lower scraper 9 holds the slurry in the material box 14 to prevent the slurry from overflowing to the outside of the material box 14. After a period of operation, the upper scraper 4 is worn by the gravure roller 3. After the upper scraper 4 is worn, the roller surface of the gravure roller 3 will be unevenly carried with material, resulting in defects in the appearance of the film surface. Therefore, it is necessary to replace the upper and lower blades of the upper scraper 4, and replace the unworn end of the upper scraper 4.

[0031] Rotate the material box 14 90° and place it in a horizontal position, place the L-shaped positioning plate 5 on the material box, make the upper part of the back plate 1 in the groove on the material box close to the installation position of the upper scraper, the upper end of the back plate abuts against the positioning surface 18 of the groove, the upper part of the back of the back plate abuts against the supporting surface 17 of the groove, and at the same time, make the back of the auxiliary support rod abut against the plane 16 in the middle of the inner cavity of the material box 14, position the L-shaped positioning plate 5 on the material box 14, and then place the upper scraper 4 in the L-shaped space of the L-shaped positioning plate 5, with the worn blade of the upper scraper 4 facing upwards, and the unworn blade of the upper scraper 4 facing downwards and aligned with the L-shaped positioning plate 5, the back of the upper scraper 4 is attached to the back plate of the L-shaped positioning plate 5, the upper part of the upper scraper 4 protrudes from the top of the back plate 1 and is located between the material box 14 and the scraper upper pressure plate 13, and then the tightening bolts are screwed to fix the upper scraper 4 on the material box 14. After completing the positioning and tightening of the upper scraper 4, after removing the L-shaped positioning plate 5, the material box 14 is rotated 90° and placed in a vertical position, and the placement position is confirmed to be the position for normal operation of the equipment. The upper scraper 4 and the lower scraper 9 on the material box 14 are closely matched with the gravure reverse roller 3, that is, the replacement of the upper and lower blades of the upper scraper 4 is completed. This embodiment takes the replacement of the upper scraper as an example, and the method of replacing the lower scraper is the same as this embodiment.

[0032] Since the blade of the upper scraper 4 is worn out at one end, the notch of the worn blade of the upper scraper 4 is irregular and the wear in the middle is larger than the wear on the two sides, after the back of the upper scraper 4 is attached to the back plate 1 of the L-shaped positioning plate 5, the unworn end of the upper scraper blade is pushed onto the bottom plate 2 of the L-shaped positioning plate 5. The distance between the front end of the bottom plate 2 and the back plate 1 is slightly larger than the thickness of the upper scraper. Since the scraper is generally long and relatively soft, the unworn blade of the upper scraper 4 may not fit well with the bottom plate 2. At this time, Use your thumb to press the scraper at the positioning notch 10 of the bottom plate 2 of the positioning plate and move the upper scraper 4 in the direction of the bottom plate 2 so that the unworn end of the upper scraper 4 is in place with the bottom plate 2 without a gap. At this time, the position of the upper scraper 4 can be ensured not to shift, and the unworn end of the upper scraper blade is in a straight line. The width of the upper scraper 4 and the back plate 1 of the L-shaped scraper positioning plate 5 is the width of the upper scraper 4 extending out of the fixing plate of the material box 14. In this way, it can be ensured that the interval between the upper scraper and the film surface is equal after each replacement of the upper scraper.

[0033] An embodiment of the method for replacing and positioning the scraper on the material box of a diaphragm coating machine of the present invention uses the L-shaped positioning plate and material box described above to replace and position the upper scraper, which includes the following steps: (1) rotating the material box 90 degrees and placing it in a horizontal position; (2) placing the L-shaped positioning plate on the material box so that the upper part of the back plate is located in a groove on the material box close to the installation position of the upper scraper, the upper end of the back plate abuts against the positioning surface of the groove, and the upper part of the back of the back plate abuts against the supporting surface of the groove, the auxiliary support rod of the L-shaped positioning plate is fitted on the plane of the supporting boss in the groove of the plate roller, and the L-shaped positioning plate is positioned on the material box; (3) placing the upper scraper on the L-shaped positioning plate In the L-shaped space of the plate, the worn blade of the upper scraper faces upward, and the unworn blade of the upper scraper 4 faces downward and contacts the bottom plate of the L-shaped positioning plate. The back of the upper scraper is attached to the back plate of the L-shaped positioning plate. The upper part of the upper scraper protrudes from the top of the back plate 1 and is located between the material box and the scraper upper pressure plate; (4) Tighten the fastening bolts to fix the upper scraper on the material box to complete the positioning and fastening of the upper scraper; (5) Remove the L-shaped positioning plate, rotate the material box 90° and place it in a vertical position, so that the material box is placed in the position where the equipment normally operates. The upper and lower scrapers on the material box are in close contact with the gravure roller, and the upper and lower blades of the upper scraper are replaced.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and these changes and improvements all fall within the scope of the present invention as claimed.

Claims

1. A coating machine scraper replacement positioning device, characterized in that: It includes an L-shaped positioning plate, which has an L-shaped space for supporting the scraper. The L-shaped positioning plate includes a back plate and a bottom plate extending along the length direction of the scraper. The back plate and the bottom plate are vertically connected together to form an L-shaped structure. The distance between the upper surface of the bottom plate and the top of the back plate is less than the width of the scraper.

2. The coating machine scraper replacement and positioning device according to claim 1, characterized in that: The bottom plate is provided with a positioning notch.

3. The coating machine scraper replacement and positioning device according to claim 2, characterized in that: The positioning notch is arranged in the middle of the bottom plate.

4. The coating machine scraper replacement and positioning device according to claim 1, characterized in that: The L-shaped positioning plate is connected with an auxiliary support rod, and the back side of the auxiliary support rod is used to fit on the plane in the plate roller groove of the material box.

5. The coating machine scraper replacement and positioning device according to claim 4, characterized in that: The auxiliary support rod is fixedly connected to the back plate.

6. The coating machine scraper replacement and positioning device according to claim 4, characterized in that: There are two auxiliary support rods, and the two auxiliary support rods are arranged at intervals.

7. The coating machine scraper replacement and positioning device according to any one of claims 1 to 6, characterized in that: The back plate and the bottom plate are connected together as one body; the lengths of the back plate and the bottom plate are equal; the length of the L-shaped positioning plate is not greater than the length of the scraper.

8. A material box for a diaphragm coating machine, comprising a material box, wherein the material box has an inner cavity for storing slurry, a plate roller groove is provided on the material box near the gravure roller, and positions above and below the plate roller groove on the material box are respectively used to install scrapers, characterized in that: The plate roller groove is provided with two mutually parallel grooves at the upper and lower positions close to the scraper, respectively. Each groove comprises a mutually perpendicular supporting surface and a positioning surface. The supporting surface is parallel to the scraper, and the positioning surface is perpendicular to the scraper.

9. The diaphragm coating machine material box according to claim 8, characterized in that: a supporting boss is provided in the plate roller groove, and a side of the supporting boss close to the gravure roller is a plane, and the plane is parallel to the supporting surface.

10. A diaphragm coater, comprising the diaphragm coater cartridge according to claim 8 or 9.

11. A method for replacing and positioning a scraper of a diaphragm coating machine, characterized in that: The method of replacing and positioning a scraper using the L-shaped positioning plate of any one of claims 1 to 7 and the material box of claim 8 or 9 comprises the following steps: (1) rotating the material box 90 degrees and placing it in a horizontal position; (2) placing the L-shaped positioning plate on the material box so that the upper part of the back plate is located in a groove on the material box close to the installation position of the scraper, the upper end of the back plate abuts against the positioning surface of the groove, and the upper part of the back of the back plate abuts against the supporting surface of the groove, and positioning the L-shaped positioning plate on the material box; (3) placing the scraper in the L-shaped space of the L-shaped positioning plate, and the worn scraper blade is fixed to the L-shaped space of the L-shaped positioning plate; The blade faces upward, and the unworn blade of the scraper faces downward in contact with the bottom plate of the L-shaped positioning plate. The back of the scraper fits against the back plate of the L-shaped positioning plate. The upper part of the scraper protrudes from the top of the back plate 1 and is located between the material box and the scraper upper pressure plate; (4) Tighten the fastening bolts to fix the scraper on the material box to complete the positioning and fastening of the scraper; (5) Remove the L-shaped positioning plate, rotate the material box 90° and place it in a vertical position, so that the material box is placed in the position where the equipment normally operates. The scraper on the material box is in close contact with the gravure roller, and the alternating use of the upper and lower blades of the scraper is completed.

12. The method for replacing and positioning a scraper of a material box of a diaphragm coating machine according to claim 11, characterized in that: in the step (2), the auxiliary support rod of the L-shaped positioning plate is attached to the plane of the supporting boss in the groove of the plate roller.

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