CN114643162B - Coating device - Google Patents
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- CN114643162B CN114643162B CN202011496104.8A CN202011496104A CN114643162B CN 114643162 B CN114643162 B CN 114643162B CN 202011496104 A CN202011496104 A CN 202011496104A CN 114643162 B CN114643162 B CN 114643162B
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- die lip
- slit
- module
- die
- mating surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
- B05C5/0262—Coating heads with slot-shaped outlet adjustable in width, i.e. having lips movable relative to each other in order to modify the slot width, e.g. to close it
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Coating Apparatus (AREA)
Abstract
The application discloses coating device includes: a coating die head, wherein a slit is arranged in the coating die head, and the slit can lead out slurry and enable the slurry to be coated on a substrate; the detection module is used for detecting the thickness of the slurry coated on the substrate; the piezoelectric adjusting module is arranged on the coating die head and can deform to adjust the width of the outlet of the slit; the feedback module is connected with the detection module and the piezoelectric adjusting module, and the feedback module controls the piezoelectric adjusting module to deform according to the thickness detected by the detection module. The coating device provided by the embodiment of the invention can monitor and adjust the thickness of the slurry in the width direction of the substrate in real time, and ensure that the thickness of the slurry coated on the substrate is consistent.
Description
Technical Field
The present application relates to the field of battery manufacturing technology, and more particularly, to a coating apparatus.
Background
The existing coating die head mainly utilizes bolts to adjust the width of the slit, and the adjusting process is tedious and poor in timeliness. When the coating thickness is not uniform in the substrate width direction, it is difficult to quickly adjust the slit width by the bolts, resulting in poor uniformity of the coating thickness.
Disclosure of Invention
An object of the present application is to provide a new technical solution of a coating device, which can solve the problem of poor uniformity of coating thickness of a coating die head in the prior art.
According to a first aspect of the present application, there is provided a coating device comprising: a coating die head, wherein a slit is arranged in the coating die head, and the slit can lead out slurry and enable the slurry to be coated on a substrate; the detection module is used for detecting the thickness of the slurry coated on the substrate; the piezoelectric adjusting module is arranged on the coating die head and can deform to adjust the width of the outlet of the slit; the feedback module is connected with the detection module and the piezoelectric adjusting module, and the feedback module controls the piezoelectric adjusting module to deform according to the thickness detected by the detection module.
Further, the coating die includes: a first mold body having a first mating surface; the second die body is provided with a second matching surface, the second matching surface is arranged opposite to the first matching surface, and the piezoelectric adjusting module is arranged on the first die body and/or the second die body; the gasket, the gasket is located between the first mating surface with the second mating surface, the first side of gasket with the first mating surface laminating, the second side of gasket with the second mating surface laminating, be equipped with on the gasket along deviating from the sunken notch of export direction of slit, the notch runs through the first side and the second side of gasket, the notch with first mating surface with the second mating surface cooperation defines the slit.
Further, the first die body is provided with a first die lip, the second die body is provided with a second die lip, the free end surfaces of the first die lip and the second die lip face the base material respectively, and the first die lip and the second die lip are matched to form an outlet of the slit; the piezoelectric adjusting module is arranged on the first die lip and/or the second die lip to adjust the width of the outlet of the slit.
Further, the first surface of the first die lip is formed on the part of the first surface of the first matching surface, which is located in the opening of the slit, the first die lip is provided with a sinking groove, the piezoelectric adjusting module is arranged in the sinking groove, the sinking groove is provided with a preset inner wall which is opposite to the first surface, the piezoelectric adjusting module can deform to squeeze the preset inner wall, and the first surface is driven to move along the direction close to or far away from the second matching surface.
Further, the first die lip is further provided with a second surface opposite to the first surface, the sinking groove is formed in the second surface, and the preset inner wall is a bottom wall of the sinking groove.
Further, the sinking groove is arranged on the free end face of the first die lip, and the preset inner wall is the inner wall of the sinking groove.
Further, the piezoelectric adjustment module includes: the adjusting piece is arranged in the sinking groove and can deform in the sinking groove to squeeze the preset inner wall; the wire harness, the one end of wire harness with the regulating part is connected, the other end of wire harness stretch out in first die body and with feedback module is connected, feedback module is according to the thickness control that detection module detected the regulating part warp.
Further, the adjusting piece is a plurality of piezoelectric ceramic plates which are arranged at intervals along the length direction of the outlet of the slit, and each piezoelectric ceramic plate is provided with the wiring harness.
Further, the distance between two adjacent piezoelectric ceramic plates is 50mm-70mm.
Further, the free end face of the first die lip and the free end face of the second die lip are arranged in a flush manner, the free end face of the first die lip and the first matching surface are in smooth transition, and the free end face of the second die lip and the second matching surface are in smooth transition.
Further, the first mating surface and the second mating surface are inclined surfaces extending obliquely relative to the respective free end surfaces, respectively.
Further, the first mating surface and the second mating surface have respective inclination angles of 50 ° to 70 ° with respect to the respective free end surfaces.
According to one embodiment of the disclosure, the detection module may detect a thickness of the slurry coated in the width direction of the substrate, and the feedback module may compare the thickness of the slurry detected by the detection module with a standard thickness value and control the piezoelectric adjustment module to adjust the width of the slit according to the comparison result. The coating device can monitor and adjust the thickness of the sizing agent in the width direction of the base material in real time, and ensures that the thickness of the sizing agent coated on the base material is consistent.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic diagram of the operation of a coating device according to an embodiment of the present invention;
fig. 2 is a front view of a coating apparatus according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic structural view of a coating die of a coating apparatus according to an embodiment of the present invention;
FIG. 5 is a top view of a coating die of a coating apparatus of an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along the direction B-B in FIG. 5;
FIG. 7 is an enlarged view of a portion of FIG. 6 at b;
fig. 8 is an exploded view of a coating die of a coating apparatus of an embodiment of the present invention;
FIG. 9 is a schematic view showing the structure of a first die body of a coating apparatus according to an embodiment of the present invention;
FIG. 10 is an enlarged view of a portion of FIG. 8 at C;
fig. 11 is a partial enlarged view at D in fig. 8.
Reference numerals:
a coating device 100;
a coating die 10; a first die body 11; a first mating surface 111; sink 112; a first die lip 113; a first surface 113a; presetting an inner wall 113b; a second surface 113c; a first free end face 113d; a second die body 12; a second mating surface 121; a second die lip 122; a slit 13; an outlet 131; a spacer 14; a recess 141; a storage chamber 15; a first cavity 151; a second cavity 152; a feed channel 16; a threaded hole 17;
a transfer member 20;
a detection module 30;
a piezoelectric adjustment module 40; an adjusting member 41; a wire harness 42;
a feedback module 50;
a base material 60;
and a bolt 70.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
The coating apparatus 100 according to the embodiment of the present invention is specifically described below with reference to the accompanying drawings.
Referring to fig. 1 to 11, a coating apparatus 100 according to an embodiment of the present invention includes a coating die 10, a detection module 30, a piezoelectric adjustment module 40, and a feedback module 50.
Specifically, the slit 13 is provided in the coating die 10, and the slit 13 can draw out the slurry and apply the slurry to the substrate 60. The detection module 30 is used to detect the thickness of the slurry coated on the substrate 60. A piezoelectric adjustment module 40 is provided to the coating die 10, and the piezoelectric adjustment module 40 is deformable to adjust the width of the outlet 131 of the slit 13. The feedback module 50 is connected with the detection module 30 and the piezoelectric adjustment module 40, and the feedback module 50 controls the piezoelectric adjustment module 40 to deform according to the thickness detected by the detection module 30.
In other words, as shown in fig. 1 and 2, the coating apparatus 100 according to the embodiment of the present invention is mainly composed of a coating die 10, a detection module 30, a piezoelectric adjustment module 40, and a feedback module 50. Therein, as shown in fig. 7, a slit 13 capable of guiding out slurry is provided in the coating die 10, and an outlet 131 of the slit 13 may correspond to one side surface of the substrate 60 to be coated. The slurry may be led out from the slit 13 in the coating die 10, and the led-out slurry may be coated on one side surface of the base material 60. The substrate 60 may be transferred by hand or by the transfer member 20 such that the slurry is coated on the surface of the substrate 60 in the coating direction of the substrate 60.
Alternatively, as shown in fig. 2, the conveyor 20 in the coating apparatus 100 of the embodiment of the present invention may employ a coating back roller through which the substrate 60 is driven. The coating back roller may be disposed at a position corresponding to the outlet 131 of the slit 13, the length direction of the outlet 131 of the slit 13 being parallel to the width direction of the substrate 60 on the transfer member 20, and the slurry in the coating die 10 being led out through the slit 13 and sprayed on the substrate 60. The longitudinal direction of the substrate 60 is understood to be the transmission direction of the substrate 60 on the transmission member 20, and the width direction of the substrate 60 is understood to be the direction perpendicular to the longitudinal direction thereof.
The coating device 100 of the present application may be applied in the pole piece production process of the power battery industry, and the substrate 60 may be a material for producing a battery pole piece. Of course, it will be understood by those skilled in the art that the coating device 100 of the present application is not limited to be applied in the pole piece production process of the power battery industry, and the substrate 60 may be other application materials, which will not be described in detail in the present application.
In some embodiments, a reservoir 15 may be provided within the coating die 10, the reservoir 15 being in communication with the inlet of the slot 13. Further, the coating die 10 may be provided with a feed channel 16, and the feed channel 16 is in communication with the reservoir 15, so that the slurry can flow from the feed channel 16 into the reservoir 15 and then from the reservoir 15 into the slot 13.
As shown in fig. 2, the detection module 30 may be used to detect the thickness of the slurry coated on the substrate 60. The detection module 30 may be disposed on one side of the substrate 60 and may be positioned generally above the substrate 60 that has been sprayed with the slurry. The thickness of the slurry applied in the width direction of the substrate 60 can be detected by providing the detection module 30. The detection module 30 may employ an areal density meter, which may detect and monitor the slurry applied in the width direction of the substrate 60 in real time. The specific structure and operating principles of the areal densitometer are understood and can be implemented by those skilled in the art. Of course, other instruments that can be used to detect the thickness of the slurry may be used for the detection module 30, and will not be described in detail in this application.
The piezoelectric adjustment module 40 is disposed on the coating die 10, the piezoelectric adjustment module 40 is deformable, and the width of the outlet 131 of the slit 13 can be adjusted by the deformation of the piezoelectric adjustment module 40, and the width of the outlet 131 of the slit 13 can be denoted as d, and the width d is shown by a double-headed arrow in fig. 7. The width of the outlet 131 of the slit 13 may be understood as the interval of the cross section of the slit 13 at the outlet, that is, the width of the outlet 131 of the slit 13 is the interval between the two inner walls of the outlet 131 opposite in the width direction thereof, the width direction of the outlet 131 is perpendicular to the length direction thereof, the length direction of the outlet 131 is parallel to the width direction of the substrate 60, and the length direction of the outlet 131 is the front-rear direction as shown in fig. 4. The feedback module 50 is connected with the detection module 30 and the piezoelectric adjustment module 40, and the feedback module 50 can control the piezoelectric adjustment module 40 to deform towards the slit 13 according to the thickness detected by the detection module 30.
As shown in fig. 1 and 2, the slurry in the coating apparatus 100 is guided out through the slit 13 and sprayed on the substrate 60, and the detection module 30 detects and monitors the coating thickness in the width direction of the substrate 60 in real time. The detection module 30 transmits the measured coating thickness data to the feedback module 50, and the feedback module 50 compares the coating thickness data detected by the detection module 30 in real time with a coating thickness standard value and sends out an optimization instruction. The piezoelectric adjusting module 40 can deform in the coating device 100 according to the optimizing instruction, and the width of the outlet 131 of the slit 13 can be micro-adjusted through the deformation of the piezoelectric adjusting module 40, so that the guiding-out amount of the slurry in the slit 13 is controlled, and the thickness of the slurry coated on the substrate 60 is ensured to be consistent.
Thus, according to the coating apparatus 100 of the embodiment of the present invention, the detection module 30 may detect the thickness of the slurry coated in the width direction of the substrate 60, and the feedback module 50 may compare the thickness of the slurry detected by the detection module 30 with a standard thickness value and control the piezoelectric adjustment module 40 to adjust the width of the slit 13 according to the comparison result. The coating device 100 can monitor and adjust the thickness of the slurry in the width direction of the substrate 60 in real time, so as to ensure the consistency of the thickness of the slurry coated on the substrate 60.
According to one embodiment of the present invention, the coating die 10 includes a first die body 11, a second die body 12, and a shim 14.
Specifically, the first mold body 11 has a first mating surface 111. The second mold body 12 has a second mating surface 121, the second mating surface 121 being disposed opposite the first mating surface 111. The piezoelectric adjustment module 40 is provided to the first mold body 11 or the second mold body 12. The gasket 14 is arranged between the first matching surface 111 and the second matching surface 121, a first side of the gasket 14 is attached to the first matching surface 111, a second side of the gasket 14 is attached to the second matching surface 121, a notch 141 recessed along a direction away from the outlet 131 of the slit 13 is arranged on the gasket 14, the notch 141 penetrates through the first side and the second side of the gasket, and the notch 141 is matched with the first matching surface 111 and the second matching surface 121 to define the slit 13.
That is, referring to fig. 2 to 8, the coating die 10 is mainly composed of a first die body 11, a second die body 12, and a gasket 14. Wherein the first mold body 11 has a first mating surface 111 and the second mold body 12 has a second mating surface 121. The second mating surface 121 may be disposed opposite the first mating surface 111. The piezoelectric adjustment module 40 may be disposed on the first mold body 11 (as shown in fig. 9 to 11) or may be disposed on the second mold body 12. Of course, the piezoelectric adjustment module 40 may be disposed on both the first mold body 11 and the second mold body 12. In some embodiments of the present invention, the first mating surface 111 may be provided with a first cavity 151, and the second mating surface 121 may be provided with a second cavity 152, where the first cavity 151 and the second cavity 152 may cooperate to define the storage cavity 15. The coating die 10 may also be provided with a feed channel 16, the feed channel 16 may be provided on the second die body 12, and the feed channel 16 may be in communication with the second cavity 152.
As shown in fig. 8, the gasket 14 may be disposed between the first mating surface 111 and the second mating surface 121, a first side of the gasket 14 may be engaged with the first mating surface 111, and a second side of the gasket 14 may be engaged with the second mating surface 121. The gasket 14 may be provided with a recess 141, the recess 141 being recessed in a direction away from the outlet 131 of the slit 13. The first side and the second side of the gasket 14 are opposite sides in the thickness direction of the gasket 14, and the notch 141 penetrates the first side and the second side of the gasket 14. The first mold body 11, the second mold body 12 and the gasket 14 may be respectively provided with a plurality of screw holes 17 corresponding to each other, the first mold body 11, the second mold body 12 and the gasket 14 may be tightly combined by the bolts 70, the recess 141 of the gasket 14 cooperates with the first mating surface 111 and the second mating surface 121 to define the slit 13, and the slurry in the storage cavity 15 may be led out through the recess 141 of the gasket 14 and coated on the substrate 60. Of course, in some embodiments of the present invention, coating die 10 may not be provided with a reservoir 15 and the slurry may be directed into and out of slot 13 and coated onto substrate 60. In addition, in the present application, the number of the threaded holes 17 on the first mold body 11, the second mold body 12, and the gasket 14 may be specifically set according to actual needs, and will not be described in detail in the present application.
In some embodiments of the present invention, the first mold body 11 has a first lip 113 and the second mold body 12 has a second lip 122. The free end surfaces of the first die lip 113 and the second die lip 122 are directed toward the substrate 60, respectively. And the first die lip 113 and the second die lip 122 can cooperate to form the outlet 131 of the slot 13. The piezoelectric adjustment module 40 can be disposed on the first die lip 113 or on the second die lip 122. Of course, the piezoelectric adjustment module 40 may also be provided on both the first die lip 113 and the second die lip 122. The piezoelectric adjustment module 40 deforms in the direction towards the slit 13, so that the width of the outlet 131 of the slit 13 is finely adjusted, the guiding-out amount of the slurry in the slit 13 is controlled, and the thickness of the slurry coated on the substrate 60 is ensured to be consistent. It should be noted that the width of the outlet 131 of the slit 13 described in the present application can be understood as the dimension of the notch 141 of the gasket 14 in the thickness direction of the gasket 14.
According to one embodiment of the present invention, the part of the surface of the first mating surface 111 located in the opening of the slit 13 forms the first surface 113a of the first die lip 113, the first die lip 113 is provided with the countersink 112, the piezoelectric adjustment module 40 is disposed in the countersink 112, the countersink 112 has a preset inner wall 113b disposed opposite to the first surface 113a, and the piezoelectric adjustment module 40 can deform to press the preset inner wall 113b and drive the first surface 113a to move in a direction approaching or separating from the second mating surface.
In other words, as shown in fig. 3, 6 and 7, a portion of the surface of the first mating surface 111 located in the opening of the slit 13 may be formed as a first surface 113a of the first die lip 113, the first die lip 113 may be provided with a countersink 112, the piezoelectric adjustment module 40 is disposed in the countersink 112, the countersink 112 has a preset inner wall 113b, and the preset inner wall 113b is disposed opposite to the first surface 113 a. As shown in fig. 9 to 11, the feedback module 50 may compare the coating thickness data detected in real time by the detection module 30 with the coating thickness standard value and issue an optimization instruction. After the piezoelectric adjusting module 40 receives the optimization instruction, the piezoelectric adjusting module 40 can deform to squeeze the preset inner wall 113b, so that the first surface 113a is driven to move along the direction close to or far from the second matching surface, and the width of the outlet 131 of the slit 13 is finely adjusted, so that the purpose of controlling the guiding quantity of the slurry in the slit 13 is achieved, and the thickness consistency of the slurry coated on the substrate 60 is ensured.
Optionally, the first die lip 113 further has a second surface 113c, the second surface 113c is disposed opposite to the first surface 113a, the countersink 112 may be disposed on the second surface 113c, and the predetermined inner wall 113b may be formed as a bottom wall of the countersink 112. The piezoelectric adjusting module 40 can deform to squeeze the bottom wall of the sink 112, and the deformation of the bottom wall of the sink 112 drives the first surface 113a to move along the direction close to or far away from the second mating surface, so as to micro-adjust the width of the outlet 131 of the slit 13, achieve the purpose of controlling the guiding amount of the slurry in the slit 13, and ensure that the thickness of the slurry coated on the substrate 60 is consistent.
Of course, in some embodiments of the present invention, the sink 112 may also be disposed on the free end surface of the first die lip 113, where the free end surface of the first die lip 113 may be denoted as the first free end surface 113d (as shown in fig. 3), in this design, the preset inner wall 113b of the sink 112 may be formed as the inner wall of the sink 112, and the piezoelectric adjustment module 40 may be capable of deforming to press the inner wall of the sink 112, and by deforming the inner wall of the sink 112, fine adjustment of the width of the outlet 131 of the slit 13 is achieved, so as to control the amount of slurry discharged from the slit 13 and ensure that the thickness of the slurry coated on the substrate 60 is uniform.
According to one embodiment of the present invention, the piezoelectric adjustment module 40 includes an adjustment member 41 and a wire harness 42.
Specifically, the adjusting member 41 is disposed in the sinking groove 112, and the adjusting member 41 is deformable in the sinking groove 112 to press the predetermined inner wall 113b. One end of the wire harness 42 is connected with the adjusting member 41, and the other end of the wire harness 42 extends out of the first die body 11 and is connected with the feedback module 50. The feedback module 50 controls the deformation of the regulating member 41 according to the thickness detected by the detection module 30.
In other words, referring to fig. 9 to 11, the piezoelectric adjustment module 40 is mainly composed of an adjustment member 41 and a wire harness 42. Wherein, adjusting piece 41 sets up in heavy groove 112, and adjusting piece 41 can take place deformation in heavy groove 112. The portion of the first mating surface 111 located within the opening of the slot 13 forms the first surface 113a of the first die lip 113, and the portion of the first die lip 113 mated with the second die lip 122 forming the outlet 131 of the slot 13 may be machined as a thin metal layer, the side surface of the thin metal layer facing the slot 13 being the first surface 113a of the first die lip 113, and the side surface of the thin metal layer facing the sink 112 being the predetermined inner wall 113b of the sink 112. The regulating member 41 may be in contact with the metal thin layer, or the regulating member 41 may not be in contact with the metal thin layer. The deformation is performed in the sink 112 by the regulating member 41 to press the preset inner wall 113b of the sink 112. The regulating member 41 may or may not be in contact with the predetermined inner wall 113b in the initial state (state in which the regulating member 41 is not deformed). As long as it is satisfied that the regulating member 41 can press the preset inner wall 113b of the sink 112 when deformed, and deform the preset inner wall 113b of the sink 112.
As shown in fig. 1 and 2, the regulator 41 is connected to the feedback module 50 through a wire harness 42, and an end of the wire harness 42 extending out of the first mold body 11 may be connected to the feedback module 50. The feedback module 50 may be in signal connection with the detection module 30, and the feedback module 50 may control the deformation of the adjusting member 41 toward the slit 13 according to the thickness detected by the detection module 30. Alternatively, the feedback module 50 of the present application may employ a programmable controller including a data input interface, a single-chip microcomputer, and a signal output interface. The detection module 30 (for example, an areal density meter) detects the thickness data of the coating in real time, and enters the singlechip through a data acquisition wire harness and a data input interface, the singlechip compares the thickness data detected in real time by the areal density meter with a standard value of the thickness of the coating, sends out an optimization instruction, and transmits the optimization instruction to the regulating element 41 through a signal output interface, and after receiving the optimization instruction, the regulating element 41 deforms towards the slit 13 to perform micro-regulation on the width of the outlet 131 of the slit 13. Of course, the specific working principle of the programmable controller is understood and can be implemented by those skilled in the art, and will not be described in detail in this application.
In some embodiments of the present invention, the adjusting member 41 is a plurality of piezoelectric ceramic plates spaced apart along the length of the outlet 131 of the slit 13, and each piezoelectric ceramic plate is provided with a wire harness 42.
That is, as shown in fig. 9 to 11, the regulating member 41 may be provided as a plurality of piezoelectric ceramic plates arranged at intervals along the length direction of the outlet 131 of the slit 13, and the length direction of the outlet 131 of the slit 13 may be understood as a direction parallel to the width direction of the base material 60. Each piezoelectric ceramic piece is connected with a wire harness 42, and the other end of the wire harness 42 penetrates out of the first die body 11 and is connected with the feedback module 50. Each piezoelectric ceramic piece is disposed in the sinking groove 112, and corresponds to a preset inner wall 113b of the sinking groove 112. Alternatively, the spacing between adjacent piezoceramic wafers may be 50mm-70mm. Each piezoelectric ceramic piece can receive a control signal of a programmable controller, when the programmable controller compares the coating thickness data detected by the detection module 30 with a coating thickness standard value, the piezoelectric ceramic piece is controlled to deform, and in the deformation process, the piezoelectric ceramic piece extrudes the preset inner wall 113b of the sink 112, so that the preset inner wall 113b of the sink 112 deforms, and the first surface 113a of the first die lip 113 is driven to deform, thereby adjusting the width of the outlet 131 of the slit 13, controlling the derived quantity of the slurry in the slit 13, and ensuring that the thickness of the slurry coated on the substrate 60 is consistent.
The regulator 41 (e.g., a piezoelectric ceramic plate), the wire harness 42, and the feedback module 50 form a circuit. The feedback module 50 guides the current signal into the adjusting member 41 through the wire harness 42, the adjusting member 41 deforms, and the current signal returns to the feedback module 50 through the wire harness 42. The wire harness 42 thus includes both wires entering the regulator 41 and wires exiting the regulator 41. Thus, the circuit loop can also accurately locate the faulty regulator 41 when the regulator 41 is abnormal, using the current signal returned from the regulator 41. Of course, the distance between two adjacent piezoelectric ceramic plates can be specifically set according to actual needs, and detailed description is omitted in this application.
According to one embodiment of the present invention, the free end surface of the first die lip 113 and the free end surface of the second die lip 122 are disposed flush, and the free end surface of the first die lip 113 and the first mating surface 111 are smoothly transitioned, and the free end surface of the second die lip 122 and the second mating surface 121 are smoothly transitioned.
In other words, the free end surface of the first die lip 113 may be coplanar with the free end surface of the second die lip 122, the free end surface of the first die lip 113 may smoothly transition with the first mating surface 111, and the free end surface of the first die lip 113 forms a rounded chamfer along the direction of the outlet 131 of the slit 13, so as to ensure a smooth transition between the free end surface of the first die lip 113 and the first mating surface 111. The free end surface of the first die lip 113 can be referred to as a first free end surface 113d (as shown in fig. 3). The countersink 112 on the first die body 11 may extend to the first die lip 113, and the countersink 112 may extend 30mm-50mm into the first die lip 113. The free end face of the second die lip 122 may also be provided with a rounded chamfer in the direction of the outlet 131 of the slot 13, ensuring a smooth transition between the free end face of the second die lip 122 and the second mating surface 121. The rounded chamfer of the first die lip 113 and the rounded chamfer of the second die lip 122 can jointly guide the slurry at the outlet 131 of the slit 13, so that the residence time of the coating slurry at the outlet 131 of the slit 13 is reduced, the risk of forming large particles by sedimentation and agglomeration of the coating slurry is reduced, and the generation of coating scribing defects is avoided.
In some embodiments of the invention, the first mating surface 111 and the second mating surface 121 are each inclined surfaces that extend obliquely relative to the respective free end surfaces. The first mating surface 111 and the second mating surface 121 have an inclination angle of 50 ° to 70 ° with respect to the respective free end surfaces.
In other words, referring to fig. 2, the substrate 60 is driven by the conveyor 20 to move the substrate 60 in the coating direction so as to spray the slurry on the substrate 60. The first mating surface 111 and the second mating surface 121 may each be provided as inclined surfaces extending obliquely with respect to the respective free end surfaces. The first mating surface 111 and the second mating surface 121 may also be understood as inclined surfaces extending obliquely with respect to the coating direction. Alternatively, the first mating surface 111 and the second mating surface 121 may have an inclination angle of 50 ° -70 ° with respect to the respective free end surfaces, and the first mating surface 111 and the second mating surface 121 may have an inclination angle with respect to the respective free end surfaces, see an angle α shown in fig. 3. By setting the first matching surface 111 and the second matching surface 121 to be inclined planes with an inclination angle of 50-70 degrees, the acute angle relation between the flowing direction of the coating slurry along with the slit 13 and the coating direction of the substrate 60 (the trend of the substrate 60) is ensured, and the non-perpendicular relation is avoided, so that the flow field is not easy to stabilize due to larger speed direction change in the slurry coating process, a flow field dead zone is formed, and the problems of coating scribing and the like caused by sedimentation and blocking after slurry agglomeration are avoided.
In summary, according to the coating apparatus 100 of the embodiment of the present invention, the detection module 30 may detect the thickness of the slurry coated on the substrate 60 in the width direction, and the feedback module 50 may compare the thickness of the slurry detected by the detection module 30 with a standard thickness value and control the piezoelectric adjustment module 40 to adjust the width of the slit 13 according to the comparison result. The coating device 100 can monitor and adjust the thickness of the slurry in the width direction of the substrate 60 in real time, so as to ensure the consistency of the thickness of the slurry coated on the substrate 60. Meanwhile, in the coating device 100, the first die lip 113 and the second die lip 122 form the outlet 131 of the slit 13, and the first die lip 113 and the second die lip 122 are designed to be in smooth transition with the first matching surface 111 and the second matching surface 121 respectively, so that the residence time of coating slurry at the outlet 131 of the slit 13 can be effectively reduced, the risk of sedimentation and agglomeration of the coating slurry to form large particles is reduced, and the generation of coating scribing defects is avoided.
Although specific embodiments of the present application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (10)
1. A coating apparatus, characterized by comprising:
a first mold body having a first mating surface;
the second die body is provided with a second matching surface, the second matching surface is opposite to the first matching surface, a slit is arranged between the first matching surface and the second matching surface, and the slit can lead out the slurry and enable the slurry to be coated on the base material;
the first die body is provided with a first die lip, the second die body is provided with a second die lip, the free end surfaces of the first die lip and the second die lip face the base material respectively, and the first die lip and the second die lip are matched to form an outlet of the slit;
the free end face of the first die lip and the free end face of the second die lip are arranged in parallel, smooth transition is realized between the free end face of the first die lip and the first matching surface, and smooth transition is realized between the free end face of the second die lip and the second matching surface;
the detection module is used for detecting the thickness of the slurry coated on the substrate;
the piezoelectric adjusting module is arranged on the first die lip and/or the second die lip to adjust the width of the outlet of the slit;
the feedback module is connected with the detection module and the piezoelectric adjusting module, and the feedback module controls the piezoelectric adjusting module to deform according to the thickness detected by the detection module.
2. The coating apparatus of claim 1, further comprising a spacer disposed between the first mating surface and the second mating surface, a first side of the spacer being in engagement with the first mating surface, a second side of the spacer being in engagement with the second mating surface, the spacer being provided with a recess recessed in a direction away from the outlet of the slot, the recess extending through the first side and the second side of the spacer, the recess in engagement with the first mating surface and the second mating surface defining the slot.
3. The coating apparatus of claim 1, wherein a portion of the surface of the first mating surface that is located within the opening of the slot forms a first surface of the first die lip, the first die lip having a countersink, the piezoelectric adjustment module being located within the countersink,
the sinking groove is provided with a preset inner wall which is opposite to the first surface, and the piezoelectric adjusting module can deform to squeeze the preset inner wall and drive the first surface to move along the direction close to or far away from the second matching surface.
4. The coating apparatus of claim 3, wherein the first die lip further has a second surface disposed opposite the first surface, the countersink is disposed on the second surface, and the predetermined inner wall is a bottom wall of the countersink.
5. A coating apparatus according to claim 3, wherein the sink is provided on a free end face of the first die lip, and the predetermined inner wall is an inner wall of the sink.
6. A coating apparatus according to claim 3, wherein the piezoelectric adjustment module comprises:
the adjusting piece is arranged in the sinking groove and can deform in the sinking groove to squeeze the preset inner wall;
the wire harness, the one end of wire harness with the regulating part is connected, the other end of wire harness stretch out in first die body and with feedback module is connected, feedback module is according to the thickness control that detection module detected the regulating part warp.
7. The coating apparatus according to claim 6, wherein the regulating member is a plurality of piezoelectric ceramic plates arranged at intervals along a length direction of the outlet of the slit, and each of the piezoelectric ceramic plates is provided with the wire harness.
8. The coating apparatus of claim 7, wherein a pitch between two adjacent piezoelectric ceramic plates is 50mm to 70mm.
9. The coating apparatus of claim 1, wherein the first mating surface and the second mating surface are each inclined surfaces extending obliquely relative to the respective free end surfaces.
10. A coating apparatus according to claim 9, wherein the first and second mating surfaces each have an inclination of 50 ° to 70 ° relative to the respective free end surface.
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| CN115672660B (en) * | 2022-11-03 | 2023-10-13 | 北京大学长三角光电科学研究院 | Slit coating apparatus and coating method |
| CN115780175B (en) * | 2022-11-16 | 2023-12-26 | 深圳市曼恩斯特科技股份有限公司 | Coating die head |
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| JP3629334B2 (en) * | 1996-04-09 | 2005-03-16 | 大日本スクリーン製造株式会社 | Coating device |
| JP2002079164A (en) * | 2000-09-07 | 2002-03-19 | Matsushita Electric Ind Co Ltd | Extrusion type nozzle, coater and method for manufacturing dielectric layer on plasma display panel front surface plate |
| JP2004033965A (en) * | 2002-07-05 | 2004-02-05 | Toppan Printing Co Ltd | Die head and die coater |
| JP2006212586A (en) * | 2005-02-07 | 2006-08-17 | Dainippon Printing Co Ltd | Coating apparatus |
| CN208437131U (en) * | 2018-04-24 | 2019-01-29 | 宁德新能源科技有限公司 | Coating machine |
| KR20200114417A (en) * | 2019-03-28 | 2020-10-07 | 주식회사 엘지화학 | Dual Slot Die Coater |
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