Device for wiping slit extrusion coating die head lip

Abstract

The utility model provides a device for wiping a slit extrusion coating die head lip. The device is mainly composed of a wiping mechanism and a moving mechanism. The wiping mechanism comprises flexible cloth, a material roller assembly and a limiting rod; the outer end of the flexible cloth is detachably installed at the driving end of the material roller assembly, the driven end of the material roller assembly is sleeved with the other parts of the flexible cloth, the two limiting rods are longitudinally arranged on the material roller assembly in parallel and located in a gap between the driving end and the driven end of the material roller assembly, and the ends, facing the flexible cloth, of the limiting rods are bent by a certain angle and are in an arc shape. The limiting rod is in contact with the flexible cloth to maintain the bending degree of the flexible cloth between the two limiting rods, and is matched with a lip of the slit extrusion coating die head; the movable end of the moving mechanism is connected with the material roller assembly and used for driving the material roller assembly in the three-axis direction. The die head lip is wiped in the winding and unwinding processes of the flexible cloth, damage to the die head lip is avoided, and the flexible cloth at the position of the die head lip is kept clean all the time.

Description

Technical Field

[0001] The utility model relates to the technical field of die lip, in particular to a device for wiping the lip of a slit extrusion coating die. Background Art

[0002] Slot extrusion coating is to apply a certain external force to the slurry so that the slurry passes through the slit of the coating die and is coated on the foil to form a film of uniform thickness. When coating is suspended, the slit of the die will stop extruding the slurry, and the fluidity of the slurry at the die lip will decrease. It is easy to solidify at the die lip, form dry material, and block the slit. The film coated later will have scratches, and in severe cases, the foil will be exposed, thereby reducing the yield of the product and even posing a safety hazard to the battery.

[0003] The prior art has a mechanism for wiping the die lip, which uses a rotatable roller to wipe the die lip of the coating die. However, the outer layer of the roller is a sponge adsorption layer, and the slurry at the die lip will be adsorbed on the sponge adsorption layer and gradually accumulate. The sponge for wiping the die lip cannot be kept clean for a long time. After a certain degree, the die lip cannot be wiped clean, and the more it is wiped, the dirtier it becomes.

[0004] Therefore, it is particularly important to find a wiping device that can wipe the die lip while keeping itself clean for a long time. Utility Model Content

[0005] Based on this, it is necessary to provide a device for wiping the lip of the slit extrusion coating die head to address the problem that the existing wiping mechanism has slurry accumulation and cannot ensure its own cleanliness when wiping.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model relates to a device for wiping the lip of a slit extrusion coating die head, which is mainly composed of a wiping mechanism and a moving mechanism.

[0008] The wiping mechanism comprises a flexible cloth, a material roller assembly and a limiting rod; the outer end of the flexible cloth is detachably mounted on the active end of the material roller assembly, and the remaining part is sleeved on the driven end of the material roller assembly; two limiting rods are longitudinally arranged in parallel on the material roller assembly and are located in the gap between the active end and the driven end of the material roller assembly; the end of the limiting rod facing the flexible cloth is bent at a certain angle and in an arc shape, and contacts the flexible cloth to maintain the curvature of the flexible cloth between the two limiting rods, and is adapted to the lip of the slit extrusion coating die head;

[0009] The movable end of the moving mechanism is connected to the material roller assembly and is used to drive the material roller assembly in three-axis directions to make the flexible cloth between the two limiting rods fit or stay away from the lip of the slit extrusion coating die head.

[0010] Further, the material roller assembly includes a support frame, a driving roller, a driven roller, and a motor; the support frame is connected to the movable end of the moving mechanism, the driving roller and the driven roller are movably installed on the support frame as the driving end and the driven end of the material roller assembly, the driving roller and the driven roller are longitudinally linearly arranged, and there is a fixed distance longitudinally between the two; the motor is installed on one side of the support frame, and the output shaft is connected to one end of the driving roller to drive the driving roller to wind.

[0011] Further, the driving roller is composed of a central shaft and a roller sleeve, and the roller sleeve is sleeved on the outer surface of the central shaft and the two are detachably connected.

[0012] Further, the flexible cloth is wound around the reel to form a rolled flexible cloth, the reel is detachably installed on the driven roller, and one end of the flexible cloth outside the reel is detachably connected to the roller sleeve.

[0013] Further, reels are respectively adhered to both ends of the flexible cloth. In the initial state, the flexible cloth is entirely wound around one of the reels, and this reel serves as the unwinding reel, while the other reel serves as the winding reel. The unwinding reel is detachably installed on the driven roller, and the winding reel is detachably installed on the driving roller.

[0014] Further, reels are respectively adhered to both ends of the flexible cloth. In the initial state, the flexible cloth is entirely wound around one of the reels, and this reel serves as the unwinding reel, while the other reel serves as the winding reel. The unwinding reel is sleeved on the driven roller, the winding reel is sleeved on the driving roller, both ends of the unwinding reel and the winding reel are in contact with the limiting rings, and the limiting rings are respectively sleeved on the driven roller and the driving roller.

[0015] Further, the support frame includes a horizontal support frame, a first longitudinal support frame, and a second longitudinal support frame; the horizontal support frame is connected to the movable end of the moving mechanism, the first longitudinal support frame and the second longitudinal support frame are respectively symmetrically arranged at both ends of the horizontal support frame and are connected to the horizontal support frame by bolts; one end of the driving roller and the driven roller is connected to the first longitudinal support frame by bearings, and the other end penetrates through the second longitudinal support frame and is in contact.

[0016] Further, the support frame includes a horizontal support frame, a first longitudinal support frame, and a second longitudinal support frame; the horizontal support frame is connected to the movable end of the moving mechanism, the first longitudinal support frame and the second longitudinal support frame are respectively symmetrically arranged at both ends of the horizontal support frame, the first longitudinal support frame is fixedly connected to the horizontal support frame, the second longitudinal support frame is slidably arranged on the horizontal support frame and is limitedly connected to the horizontal support frame by bolts; one end of the driving roller and the driven roller is connected to the first longitudinal support frame by bearings, and the other end penetrates through the second longitudinal support frame and is in contact.

[0017] Further, the limiting rod is in a "C" shape, the open end is connected to the horizontal support frame, and the end symmetrical to the opening is bent and in contact with the flexible cloth.

[0018] Further, the moving mechanism adopts a three-axis sliding table module, and the material roller assembly is connected to the movable end of the three-axis sliding table module facing the slit extrusion coating die head.

[0019] Compared with the prior art, the beneficial effects of the utility model include:

[0020] 1. The utility model wipes the die lip by utilizing the winding and unwinding process of the flexible cloth, thereby avoiding damage to the die lip, and uses the winding and unwinding operation to roll up the flexible cloth with slurry after wiping the die lip, so that the flexible cloth at the die lip is always kept clean. In addition, the flexible cloth is made to fit and wrap the die lip through the limit rod, so that no slurry is left near the die lip during the wiping operation;

[0021] 2. The utility model drives the entire wiping mechanism to move in three directions within the working area of ​​the coating die head through a moving mechanism; after the coating is completed and the die head is withdrawn, the wiping mechanism enters the working area of ​​the die head to wipe the die head lip, and moves out of the working area after wiping is completed, without affecting the coating process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0023] Figure 1 This is a three-dimensional diagram of a device for wiping the lip of a slit extrusion coating die introduced in the utility model;

[0024] Figure 2 Based on Figure 1 A top view of a device for wiping the lip of a slot extrusion coating die;

[0025] Figure 3 Based on Figure 1 A side cross-sectional view of a wiping mechanism;

[0026] Figure 4 This is a schematic structural diagram of the active roller and the support frame of the wiping mechanism introduced in Example 1;

[0027] Figure 5 This is a schematic diagram of the wiping mechanism introduced in Example 2;

[0028] Figure 6 This is a schematic diagram of the wiping mechanism introduced in Example 3.

[0029] Explanations in the figure: 1. Slit extrusion coating die; 11. Lip; 2. Wiping mechanism; 21. Flexible cloth; 203. Reel; 22. Material roller assembly; 221. Support frame; 204. Horizontal bracket; 205. First longitudinal bracket; 206. Second longitudinal bracket; 222. Active roller; 201. Center axis; 202. Roller sleeve; 223. Driven roller; 224. Motor; 23. Limit rod; 3. Moving mechanism. DETAILED DESCRIPTION

[0030] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0031] Example 1

[0032] See also Figure 1 This embodiment introduces a device for wiping the lip of a slit extrusion coating die, which is mainly composed of a wiping mechanism 2 and a moving mechanism 3.

[0033] like Figure 2 and Figure 3 As shown, the wiping mechanism 2 is first described in detail. The wiping mechanism 2 mainly includes a flexible cloth 21, a material roller assembly 22 and a limit rod 23. The flexible cloth 21 is made of flexible materials such as non-woven fabrics, which can wipe the slurry while reducing damage to the mold lip 11. The material roller assembly 22 includes a support frame 221, an active roller 222, a driven roller 223 and a motor 224. The support frame 221 is composed of a transverse bracket 204, a first longitudinal bracket 205 and a second longitudinal bracket 206. The first longitudinal bracket 205 and the second longitudinal bracket 206 form a U-shaped structure with the transverse bracket 204. In order to reduce the weight of the transverse bracket 204, the interior of the transverse bracket 204 is hollow. The first longitudinal bracket 205, the second longitudinal bracket 206 and the transverse bracket 204 are spliced ​​into one by bolt connection.

[0034] The active roller 222 and the driven roller 223 are in parallel with the horizontal bracket 204 and are located between the first longitudinal bracket 205 and the second longitudinal bracket 206. The active roller 222 and the driven roller 223 are arranged linearly in the longitudinal direction and maintain a fixed spacing. The active roller 222 and the driven roller 223 are movably installed on the first longitudinal bracket 205 and the second longitudinal bracket 206 as the active end and the driven end of the material roller assembly 22. One end of the active roller 222 and the driven roller 223 is connected to the bearing of the first longitudinal bracket 205, and the other end passes through the second longitudinal bracket 206 and contacts. The motor 224 is installed on the outside of the first longitudinal bracket 205 through the bracket and is connected to the central axis of the active roller 222. Since the motor 224 is connected to the active roller 222, the active roller 222 is used for winding and the driven roller 223 is used for unwinding.

[0035] like Figure 4As shown in the figure, in order to make the flexible cloth 21 removable after being wound on the driving roller 222 and the driven roller 223. In this embodiment, the driving roller 222 is of a split structure, which is composed of a central shaft 201 and a roller sleeve 202. The roller sleeve 202 is sleeved on the outer surface of the central shaft 201 and the two are detachably connected by bolts and other parts. One end of the central shaft 201 is connected to the first longitudinal bracket 205 by bearings. A hole adapted to the central shaft 201 is opened on the second longitudinal bracket 206, so that the central shaft 201 can pass through the second longitudinal bracket 206. One end of the flexible cloth 21 is bonded to the winding drum 203 and wound to form a rolled flexible cloth. The winding drum 203 is detachably installed on the driven roller by bolts and other parts. One end of the flexible cloth 21 located outside the winding drum 203 is detachably connected to the roller sleeve 202 by bonding, clamping and other means.

[0036] When the motor 224 is started, the driving roller 222 winds up. The flexible cloth 21 located on the winding drum 203 is wound around the roller. After all the flexible cloth 21 located on the winding drum 203 is wound onto the roller sleeve 202, the second longitudinal bracket 206 is removed from the transverse bracket 204. Subsequently, the winding drum 203 is removed from the driven roller 223, and the roller sleeve 202 is removed from the central shaft 201. It is possible to choose to remove the flexible cloth 21 on the roller sleeve 202 and then reassemble it onto the central shaft 201, or choose to assemble a new roller sleeve 202 onto the central shaft 201. Subsequently, the new winding drum 203 wound with the flexible cloth 21 is installed on the driven roller 223, and then the second longitudinal bracket 206 is reinstalled on the transverse bracket 204 to complete the replacement of the flexible cloth 21.

[0037] The limiting rod 23 is shaped like a "C", the open end is connected to the transverse bracket 204, and the end symmetrical to the opening is bent and contacts the flexible cloth 21. The bent part of the limiting rod 23 is an arc surface. The cooperation of the two limiting rods 23 can make the bending degree slit of the flexible cloth 21 between the two limiting rods adapt to the lip 11 of the slot extrusion coating die head 1. And the limiting rod 23 is located inside the flexible cloth 21. When the outer layer of the flexible cloth 21 adapts to the lip 11 of the slot extrusion coating die head 1, the end of the limiting rod 23 contacts the periphery of the lip 11 of the slot extrusion coating die head 1, and the flexible cloth 21 can fit and wrap around the vicinity of the die head lip 11 to avoid slurry residue and solidification near the die head lip 11 to form dry material.

[0038] The moving mechanism 3 can adopt a three-axis slide table module, or other structures that can achieve three-dimensional movement. In this embodiment, the wiping mechanism 2 is installed on the movable end that slides along the length direction of the slot extrusion coating die head 1 and can be installed by bolts.

[0039] During coating, the slurry is squeezed and sprayed out from the die lip 11. When coating stops, the wiping mechanism 2 enters the working area of ​​the coating die through the slides in the X and Z directions, and wipes the die lip 11 through the slide movement in the Y direction; the wiping mechanism 2 wipes the die lip 11 with the non-woven fabric through the reeling working mode; after wiping, the coating die working area is coated through the slides in the X and Z directions. The die lip 11 wiping device can prevent the slurry from staying at the lip 11 to form dry material, thereby reducing coating streaks, foil leakage and other undesirable conditions. The wiping mechanism replaces manual wiping of the die lip, thereby avoiding damage to the hands caused by the coating die being squeezed when the coating die moves forward due to improper operation.

[0040] Example 2

[0041] like Figure 5 As shown, this embodiment introduces a device for wiping the lip of a slit extrusion coating die, which is basically the same in structure as the device for wiping the lip of a slit extrusion coating die introduced in Example 1. The difference is that the active roller 222 and the driven roller 223 of this embodiment have the same structure and can both adopt an integrated structure, but reels 203 are respectively bonded to both ends of the flexible cloth 21, and in the initial state, the flexible cloth 21 is completely wound on one of the reels 203, and the reel 203 serves as a material unwinding reel, and the other reel 203 serves as a material rewinding reel, and the material unwinding reel is detachably mounted on the driven roller 223 by bolts, and the material rewinding reel is detachably mounted on the active roller 222 by bolts. When the motor 224 is started, the reel 203 on the active roller 222 is wound up, and the reel 203 on the driven roller 223 is unwound. When the flexible cloth 21 of the reel 203 on the driven roller 223 is completely wound around the reel 203 on the active roller 222, the flexible cloth 21 can be replaced, that is, the reel 203 on the active roller 222 and the driven roller 223 is removed, and a new reel 203 wound with the flexible cloth 21 is installed.

[0042] This embodiment has the same beneficial effects as Embodiment 1.

[0043] Example 3

[0044] like Figure 6As shown, this embodiment introduces a device for wiping the lip of a slit extrusion coating die, which is basically the same in structure as the device for wiping the lip of a slit extrusion coating die introduced in Example 1. The difference is that the active roller 222 and the driven roller 223 of this embodiment have the same structure and can both adopt an integrated structure, but the two ends of the flexible cloth 21 are respectively bonded with reels 203. In the initial state, the flexible cloth 21 is completely wound on one of the reels 203, and the reel 203 serves as a material unwinding reel, and the other reel 203 serves as a material rewinding reel. The material unwinding reel is sleeved on the driven roller 223, and the material rewinding reel is sleeved on the active roller 222. Both ends of the material unwinding reel and the material rewinding reel are fitted with limiting rings, and the limiting rings are respectively sleeved on the driven roller 223 and the active roller 222. By limiting the reel 203 through the limiting ring, the position of the reel 203 can be adjusted without the need for hole opening.

[0045] This embodiment has the same beneficial effects as Embodiment 1.

[0046] Example 4

[0047] This embodiment introduces a device for wiping the lip of a slit extrusion coating die, which is basically the same in structure as the device for wiping the lip of a slit extrusion coating die introduced in Example 1. The difference is that the first longitudinal bracket 205 in the support frame 221 of this embodiment is fixedly connected to the transverse bracket 204, and the second longitudinal bracket 206 is slidably arranged on the transverse bracket 204 and is limitedly connected to the transverse bracket 204 by bolts; one end of the active roller 222 and the driven roller 223 is connected to the bearing of the first longitudinal bracket 205, and the other end passes through the second longitudinal bracket 206 and contacts. The sliding arrangement of the second longitudinal bracket 206 and the transverse bracket 204 can maintain the stability of the second longitudinal bracket 206, and also facilitate the connection of the second longitudinal bracket 206 and the transverse bracket 204.

[0048] This embodiment has the same beneficial effects as Embodiment 1.

[0049] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A device for wiping the lip of a slot extrusion coating die, characterized in that: It includes: A wiping mechanism (2), comprising a flexible cloth (21), a material roller assembly (22) and a limiting rod (23); The outer end of the flexible cloth (21) is detachably mounted on the active end of the material roller assembly (22), and the remaining part is sleeved on the driven end of the material roller assembly (22). Two limiting rods (23) are longitudinally and parallelly arranged on the material roller assembly (22) and are located in the gap between the active end and the driven end of the material roller assembly (22). The end of the limiting rod (23) facing the flexible cloth (21) is bent at a certain angle and in an arc shape, and contacts the flexible cloth (21) to maintain the curvature of the flexible cloth (21) between the two limiting rods (23), and is adapted to the lip (11) of the slit extrusion coating die (1); The movable end of the moving mechanism (3) is connected to the material roller assembly (22) and is used to drive the material roller assembly (22) in three-axis directions so that the flexible cloth (21) between the two limit rods (23) is attached to or away from the lip (11) of the slit extrusion coating die head (1).

2. The device for wiping the lip of a slot extrusion coating die according to claim 1, characterized in that: The material roller assembly (22) comprises a support frame (221), a driving roller (222), a driven roller (223) and a motor (224); the support frame (221) is connected to the movable end of the moving mechanism (3); the driving roller (222) and the driven roller (223) are movably mounted on the support frame (221) as the driving end and the driven end of the material roller assembly (22); the driving roller (222) and the driven roller (223) are longitudinally linearly arranged with a fixed distance between them; the motor (224) is mounted on one side of the support frame (221), and the output shaft is connected to one end of the driving roller (222) to drive the driving roller (222) to reel.

3. The device for wiping the lip of a slot extrusion coating die according to claim 2, characterized in that: The active roller (222) is composed of a central shaft (201) and a roller sleeve (202), wherein the roller sleeve (202) is sleeved on the outer surface of the central shaft (201) and the two are detachably connected.

4. The device for wiping the lip of a slot extrusion coating die according to claim 3, characterized in that: The flexible cloth (21) is wound on a reel (203), and the reel (203) is detachably mounted on a driven roller (223). One end of the flexible cloth (21) located outside the reel (203) is detachably connected to the roller sleeve (202).

5. The device for wiping the lip of a slot extrusion coating die according to claim 2, characterized in that: Rollers (203) are respectively bonded to both ends of the flexible cloth (21). In an initial state, the flexible cloth (21) is completely wound on one of the rolls (203), and the roll (203) serves as a material unwinding roll, while the other roll (203) serves as a material receiving roll. The material unwinding roll is detachably mounted on a driven roller (223), while the material receiving roll is detachably mounted on an active roller (222).

6. The device for wiping the lip of a slot extrusion coating die according to claim 2, characterized in that: Rollers (203) are respectively bonded to the two ends of the flexible cloth (21). In an initial state, the flexible cloth (21) is completely wound on one of the rolls (203), and the roll (203) serves as a material unwinding roll, and the other roll (203) serves as a material reeling roll. The material unwinding roll is sleeved on a driven roller (223), and the material reeling roll is sleeved on a driving roller (222). Both ends of the material unwinding roll and the material reeling roll are in contact with limiting rings, and the limiting rings are respectively sleeved on the driven roller (223) and the driving roller (222).

7. The device for wiping the lip of a slot extrusion coating die according to claim 2, characterized in that: The support frame (221) includes a horizontal support (204), a first longitudinal support (205) and a second longitudinal support (206); the horizontal support (204) is connected to the movable end of the moving mechanism (3), and the first longitudinal support (205) and the second longitudinal support (206) are symmetrically arranged at both ends of the horizontal support (204) and connected to the horizontal support (204) by bolts; one end of the driving roller (222) and the driven roller (223) is connected to the first longitudinal support (205) by bearings, and the other end penetrates through the second longitudinal support (206).

8. The device for wiping the lip of a slot extrusion coating die according to claim 2, characterized in that: The support frame (221) includes a horizontal support (204), a first longitudinal support (205) and a second longitudinal support (206); the horizontal support (204) is connected to the movable end of the moving mechanism (3), the first longitudinal support (205) and the second longitudinal support (206) are symmetrically arranged at both ends of the horizontal support (204) respectively, the first longitudinal support (205) is fixedly connected to the horizontal support (204), the second longitudinal support (206) is slidably arranged on the horizontal support (204) and is limitedly connected to the horizontal support (204) by bolts; one end of the driving roller (222) and the driven roller (223) is connected to the first longitudinal support (205) by bearings, and the other end penetrates through the second longitudinal support (206).

9. The device for wiping the lip of a slot extrusion coating die according to any one of claims 7 to 8, characterized in that: The limiting rod (23) is in a "C" shape, the open end is connected to the horizontal support (204), and the end opposite to the opening is bent and contacts the flexible cloth (21).

10. The device for wiping the lip of a slot extrusion coating die according to claim 1, characterized in that: The moving mechanism (3) adopts a three-axis sliding table module, and the material roller assembly (22) is connected to the movable end of the three-axis sliding table module facing the slit extrusion coating die head (1).

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