Coating die, coating apparatus, and battery production apparatus
A coating die includes a die body and a regulation assembly. An accommodating cavity for accommodating a slurry is provided in the die body, and the die body is further provided with a coating gap communicating with the accommodating cavity and extending along a first direction. The regulation assembly includes a flow regulation member running through the die body along a second direction and capable of running into the coating gap. The regulation assembly further includes a drive mechanism, where the drive mechanism is connected to an end of the flow regulation member extending out of the die body so as to drive the flow regulation member to move along the second direction, and the drive mechanism is configured to be able to regulate displacement of the flow regulation member in the second direction according to coating weight information of a slurry flowing out of the coating gap.
1 . A coating die, comprising:
a die body, wherein an accommodating cavity for accommodating a slurry is provided in the die body, and the die body is further provided with a coating gap communicating with the accommodating cavity and extending along a first direction; and
a regulation assembly, wherein the regulation assembly comprises:
a flow regulation member running through the die body along a second direction and running into the coating gap, the flow regulation member being configured to move along the second direction relative to the die body; and
a drive mechanism and a transmission member, wherein the drive mechanism is connected to an end of the flow regulation member extending out of the die body so as to drive the flow regulation member to move along the second direction, and wherein the drive mechanism is connected to the end of the flow regulation member extending out of the die body via the transmission member so as to drive, via the transmission member, the flow regulation member to move a preset distance along the second direction per unit time; and
the drive mechanism being configured to regulate displacement of the flow regulation member in the second direction according to coating weight information of a slurry flowing out of the coating gap;
wherein the first direction and the second direction intersect with each other;
wherein the transmission member moves along the first direction under a driving force of the drive mechanism and drives the flow regulation member to move along the second direction; and
wherein in a same time period, a displacement of the transmission member in the first direction is larger than a displacement of the flow regulation member in the second direction;
wherein the transmission member has a first inclined surface at an angle to both the first direction and the second direction, and the flow regulation member has a second inclined surface parallel to the first inclined surface; and
the first inclined surface fits with the second inclined surface to convert linear motion of the transmission member in the first direction into linear motion of the flow regulation member in the second direction;
wherein the transmission member comprises a first portion connected to the drive mechanism and extending along the first direction and a second portion connected to a side of the first portion away from the drive mechanism; and
the first inclined surface is provided on the second portion;
wherein the flow regulation member has a through groove for the second portion to run through, and the second inclined surface is provided on a side wall of the through groove.
2 . The coating die according to claim 1 , wherein:
the first inclined surface is one of two first inclined surfaces each provided at one of two opposite sides of the second portion in the second direction; and
the second inclined surface is one of two second inclined surfaces provided at the side wall of the through groove of the flow regulation member, the second inclined surfaces being in one-to-one correspondence with the first inclined surfaces.
3 . The coating die according to claim 1 , further comprising:
a guide member;
wherein the first portion is slidably connected to the guide member in the first direction.
4 . The coating die according to claim 3 , wherein:
the guide member has a first sliding groove and a second sliding groove spaced apart in the first direction and communicating with each other;
the transmission member further comprises a third portion connected to a side of the second portion away from the first portion; and
the first portion is slidably connected to the first sliding groove in the first direction, and the third portion is slidably connected to the second sliding groove in the first direction.
5 . The coating die according to claim 4 , wherein a rolling member is disposed on a side wall of at least one of the first sliding groove and the second sliding groove, the rolling member being configured to rotate under driving of the transmission member moving along the first direction.
6 . The coating die according to claim 5 , wherein:
the guide member comprises a first pressing plate assembly and a second pressing plate assembly that are disposed opposite each other and spaced apart in the first direction;
the first sliding groove is provided in the first pressing plate assembly, and the second sliding groove is provided in the second pressing plate assembly; and
a sliding way extending along the second direction is defined between the first pressing plate assembly and the second pressing plate assembly, and the flow regulation member is slidably connected to the sliding way in the second direction.
7 . The coating die according to claim 6 , wherein:
the first pressing plate assembly comprises a first pressing plate and a first support plate that are disposed opposite each other and spaced apart in the second direction, and the first sliding groove is formed between the first pressing plate and the first support plate; a side wall of the first sliding groove comprises a first side wall provided on the first pressing plate, the first side wall being provided with a first groove recessed toward a side away from the first support plate in the second direction; and the first rolling member is disposed in the first groove; and/or
the second pressing plate assembly comprises a second pressing plate and a second support plate that are disposed opposite each other and spaced apart in the second direction, and the second sliding groove is formed between the second pressing plate and the second support plate; a side wall of the second sliding groove comprises a second side wall provided on the second support plate, the second side wall being provided with a second groove recessed toward a side away from the second pressing plate in the second direction; and the first rolling member is disposed in the second groove.
8 . The coating die according to claim 1 , further comprising:
a gap regulation member, the gap regulation member movably running through the flow regulation member along the second direction, extending into the through groove, and abutting against the transmission member in the second direction.
9 . The coating die according to claim 1 , wherein a rolling member is disposed between the transmission member and the flow regulation member.
10 . The coating die according to claim 1 , further comprising:
a controller, the controller being electrically connected to the drive mechanism, and the controller being configured to obtain the coating weight information of the slurry flowing out of the coating gap and control output of the drive mechanism according to the coating weight information.
11 . The coating die according to claim 10 , wherein:
the regulation assembly is one of a plurality of regulation assemblies spaced apart in a third direction and the drive mechanism is one of a plurality of drive mechanisms, and the controller is electrically connected to the plurality of drive mechanisms of the plurality of regulation assemblies to synchronously control output of all the plurality of drive mechanisms; and
the first direction, the second direction, and the third direction intersect with each other.
12 . The coating die according to claim 11 , wherein:
the flow regulation member comprises an extrusion body running through the die body along the second direction and a flow blocking member disposed at a bottom end of the extrusion body;
the coating gap has a first wall surface and a second wall surface disposed opposite each other in the second direction; and
the flow blocking member has a limit position during movement of the flow regulation member in the second direction, and when the flow blocking member is in the limit position, a bottom end of the flow blocking member runs through the first wall surface along the second direction and abuts against the second wall surface of the coating gap to block the coating gap.
13 . The coating die according to claim 12 , wherein:
the flow blocking member is one of a plurality of flow blocking members;
the flow blocking member comprises a body portion disposed at the bottom end of the extrusion body and a protruding portion disposed on a side of the body portion in the third direction, the body portion and the protruding portion forming an engagement recess; and
in two adjacent flow blocking members of the plurality of flow blocking members corresponding to two adjacent regulation assemblies of the plurality of regulation assemblies, the protruding portion of one flow blocking member of the plurality of flow blocking members is in fit connection with an engagement recess of another flow blocking member of the plurality of flow blocking members.
14 . The coating die according to claim 1 , wherein the drive mechanism comprises a servo driver.
15 . The coating die according to claim 1 , wherein:
the die body comprises a first die head and a second die head disposed opposite each other in the second direction, and the coating gap is formed between the first die head and the second die head; and
the accommodating cavity is provided in the second die head, and the flow regulation member runs through the first die head along the second direction and is capable of running into the coating gap.