CN219943438U

CN219943438U - Coating die head and coating machine

Info

Publication number: CN219943438U
Application number: CN202321280376.3U
Authority: CN
Inventors: 陈贵山; 诸葛挺; 刘宗辉; 彭建林
Original assignee: Shenzhen Manst Technology Co Ltd
Current assignee: Shenzhen Manst Technology Co Ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-11-03
Anticipated expiration: 2033-05-24

Abstract

The utility model discloses a coating die head and a coating machine, and relates to the technical field of manufacturing of battery pole pieces. The coating die head comprises a first die head, a second die head, a coating component and a covering component; a first gasket is clamped between the first die head and the second die head so as to form a first coating slit in a surrounding manner, the second die head is provided with a slurry distribution cavity communicated with the first coating slit, and the slurry distribution cavity is suitable for introducing first slurry; a coating assembly mounted to the first die and extending into the first coating slot, the coating assembly adapted to pass through the second slurry; the material covering component is arranged on the first die and communicated with the first pore canal, and is suitable for introducing third slurry. The utility model realizes multi-material coating, greatly improves the efficiency of production and manufacture and saves the cost. And moreover, the existing die body is not required to be modified, the corresponding adjusting mechanism is only required to be replaced to be a coating component, and the compatibility is high. In addition, the coating can be applied to double-layer coating, and double-layer multi-material dispensing of a double-layer coating surface is realized.

Description

Coating die head and coating machine

Technical Field

The utility model relates to the technical field of manufacturing of lithium battery pole pieces, in particular to a coating die head and a coating machine.

Background

Slit extrusion coating is a precise wet coating technique, and its working principle is that a slurry is extruded and ejected along a slit of a coating die under a certain pressure and a certain flow rate to be transferred onto a substrate. Compared with other coating modes, the coating method has the advantages of high coating speed, high precision and uniform wet thickness; the coating system is closed, can prevent pollutant entering in the coating process, the slurry utilization rate is high, the slurry property can be kept stable, and the coating system can adapt to different slurry viscosities and solid content ranges.

The coating die head consists of an upper die head, a lower die head and a gasket clamped in the upper die head, a cavity is formed in the lower die head, slurry enters the cavity from a feed inlet, a notch for the slurry to flow out is formed in the front end of the gasket, a coating slit is formed by surrounding the upper die head, the lower die head and the gasket, the slurry is extruded from a coating lip to coat the slurry to a substrate on a coating roller through the coating slit, and a functional layer is formed on the substrate, such as coating a negative electrode slurry on a copper foil, so as to form a battery negative electrode plate; and coating positive electrode slurry on the aluminum foil to form a battery positive electrode plate.

Along with the development of technology, according to different technological requirements of the battery pole piece, the edge of the first sizing agent is required to be coated with second sizing agent, and then the edge of the second sizing agent is required to be coated with third sizing agent so as to meet special requirements. For example: coating another slurry on the two side edges of the functional slurry coating on the substrate, and coating insulating glue on the edges of the slurry; or two different insulating adhesives are respectively and sequentially coated on the two side edges of the functional slurry coating on the substrate.

However, in the conventional solution, the second paste is coated on the edge of the first paste by using the dispensing coating die (i.e. the conventional dispensing coating die can only coat the first paste and the second paste), and then an external dispensing device is further arranged at the next station to coat the third paste at the outermost edge. The production mode has lower efficiency, larger equipment cost investment and higher labor cost of multiple stations.

Disclosure of Invention

The utility model mainly aims to provide a coating die head and a coating machine, which aim to improve the production efficiency and save the cost.

To achieve the above object, the present utility model provides a coating die comprising:

the first die head is provided with a first pore canal;

the second die head is fixedly connected with the first die head, a first gasket is clamped between the first die head and the second die head so as to enclose a first coating slit communicated with the first pore canal, the first die head and the second die head form a first coating lip on the discharging side of the first coating slit, a runner communicated with the first coating lip is arranged on the first gasket, and the runner is communicated with the glue outlet end of the first pore canal; the second die head is provided with a slurry distribution cavity communicated with the first coating slit, the slurry distribution cavity is suitable for introducing first slurry, and the first slurry is coated on a substrate through the first coating lip;

a coating component mounted on the first die and extending into the first coating slot, the coating component being adapted to pass through a second slurry and to coat the second slurry to both side edges of the first slurry; and

and the coating component is arranged on the first die and communicated with the glue inlet end of the first pore canal, and is suitable for introducing third slurry and enabling the third slurry to be coated on the edge of the second slurry.

Optionally, the coating subassembly includes fixing base, rubberizing valve, connecting pipe and cavity T piece, cavity T piece includes hollow tube and rubberizing piece, the rubberizing valve with the hollow tube passes through the connecting pipe intercommunication, the hollow tube passes through the fixing base is fixed in on the first die head and stretches into first coating slit department, rubberizing piece with the hollow tube intercommunication is equipped with the rubber coating passageway.

Optionally, the glue outlet of the glue spreading channel is located at the edge of the coating notch of the first gasket, and the glue outlet end of the runner is located at the edge of the glue outlet of the glue spreading channel, so that the second slurry is coated on two side edges of the first slurry, and the third slurry is coated on the edge of the second slurry.

Optionally, the coating die head further includes an adjusting mechanism, a mounting hole communicated with the first coating slit is formed in the first die head, and the adjusting mechanism or the coating component is detachably arranged at the mounting hole and stretches into the first coating slit to be used for adjusting the coating thickness.

Optionally, the adjusting mechanism comprises an actuating mechanism and a T-shaped shutoff block connected with the actuating mechanism, wherein the T-shaped shutoff block is arranged in the first coating slit.

Optionally, the hollow T-block is also for use as the T-shaped shut-off block.

Optionally, the actuating mechanism is differential head or motor, differential head or the motor is fixed in through the mount pad on the first die head, differential head or the output of motor passes through the shaft coupling and connects the transfer pole, the transfer pole with cavity T piece is connected, set up the interface on the lateral wall of transfer pole, the glue spreading valve pass through the pipeline with the interface intercommunication.

Optionally, the coating die head further includes a third die head, the third die head is fixedly connected with the second die head, a second gasket is clamped between the third die head and the second die head, so as to enclose and form a second coating slit, and the third die head and the second die head form a second coating lip on the discharging side of the second coating slit.

Optionally, the third die head is provided with the coating component; and/or

The second die head is provided with a second pore canal, and the glue inlet end of the second pore canal corresponds to the glue outlet end of the first pore canal and is communicated or not communicated through the first gasket.

To achieve the above object, the present utility model also proposes a coater including the coating die as described above, the coating die comprising:

the first die head is provided with a first pore canal;

In the technical scheme of the utility model, the coating die head comprises a first die head, a second die head, a coating component and a covering component; the first die head is provided with a first pore canal; the second die head is fixedly connected with the first die head, a first gasket is clamped between the first die head and the second die head so as to enclose a first coating slit communicated with the first pore canal, the first die head and the second die head form a first coating lip on the discharging side of the first coating slit, a runner communicated with the first coating lip is arranged on the first gasket, and the runner is communicated with the glue outlet end of the first pore canal; the second die head is provided with a slurry distribution cavity communicated with the first coating slit, the slurry distribution cavity is suitable for introducing first slurry, and the first slurry is coated on the substrate through the first coating lip; the coating component is arranged on the first die and extends into the first coating slit, and is suitable for introducing the second slurry and coating the second slurry on two side edges of the first slurry; the coating component is arranged on the first die and communicated with the glue inlet end of the first pore canal, and is suitable for introducing third slurry and enabling the third slurry to be coated on the edge of the second slurry. It can be appreciated that the coating component is arranged, so that the second slurry is coated on the two side edges of the first slurry, and the coating component is arranged, so that the third slurry is further coated on the edge of the second slurry, and the multi-station processing is combined to the same station processing, thereby greatly improving the production efficiency, reducing the equipment cost investment and saving the labor cost.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a single layer coating die according to an embodiment of the present utility model;

FIG. 2 is a top view of one embodiment of a single layer coating die of the present utility model;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken at B-B of FIG. 2;

FIG. 5 is an internal block diagram of one embodiment of a single layer coating die of the present utility model;

FIG. 6 is a schematic view of a hollow T-block structure of an embodiment of a single layer coating die of the present utility model;

FIG. 7 is a schematic illustration of a single layer pole piece made by a single layer coating die of the present utility model;

FIG. 8 is a schematic view of a two-layer multi-material coating die according to an embodiment of the present utility model;

FIG. 9 is a front view of one embodiment of a two-layer multi-feed coating die of the present utility model;

FIG. 10 is a cross-sectional view taken at C-C of FIG. 9;

FIG. 11 is a cross-sectional view of another embodiment of a two-layer multi-feed coating die of the present utility model;

FIG. 12 is a schematic illustration of a two-layer pole piece made by a two-layer coating die of the present utility model;

FIG. 13 is a schematic illustration of another two-layer pole piece made by the two-layer coating die of the present utility model;

FIG. 14 is an internal block diagram of another embodiment of a single layer coating die of the present utility model;

FIG. 15 is a top view of another embodiment of a single layer coating die of the present utility model;

FIG. 16 is a cross-sectional view taken at D-D of FIG. 15;

FIG. 17 is an enlarged view of portion E of FIG. 16;

FIG. 18 is a schematic view of another embodiment of a monolayer coating die of the present utility model;

FIG. 19 is a schematic view showing the structure of an adjusting mechanism in another embodiment of the single-layer coating die of the present utility model;

FIG. 20 is a schematic view of the structure of the switching rod of the adjusting mechanism in another embodiment of the single-layer coating die of the present utility model;

FIG. 21 is a schematic view of a gasket in an embodiment of a coating die of the present utility model;

FIG. 22 is a schematic view of a gasket in another embodiment of a coating die of the present utility model.

Reference numerals illustrate:

10. a first die; 20. a second die; 30. a paint assembly; 40. a coating component; 50. a first gasket; 10a, a first duct; 10b, a first coating slit; 10c, a first coating lip; 50a, a runner; 50b, half slots; 50c, through holes; 20a, a slurry distribution chamber; 101. a first slurry; 102. a second slurry; 103. a third slurry; 100. a substrate; 31. a fixing seat; 32. a glue coating valve; 33. a connecting pipe; 34. a hollow T block; 341. a hollow tube; 342. coating a glue block; 342a, a glue outlet; 60. an adjusting mechanism; 61. a differentiating head; 62. a T-shaped shutoff block; 63. a mounting base; 64. a coupling; 65. a transfer rod; 65a, an adapter; 70. a third die; 80. a second gasket; 20b, second portholes.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a coating die head, which can be applied to a coating device, in particular to a high-temperature slurry coating machine for manufacturing a new energy lithium battery pole piece, and is not limited in the process.

Referring to fig. 1-7, in one embodiment of the present utility model, the coating die comprises a first die 10, a second die 20, a coating assembly 30, and a cover assembly 40; the first die head 10 is provided with a first orifice 10a; the second die head 20 is fixedly connected with the first die head 10, a first gasket 50 is clamped between the first die head 10 and the second die head 20 to enclose a first coating slit 10b communicated with the first pore canal 10a, the first die head 10 and the second die head 20 form a first coating lip 10c on the discharging side of the first coating slit 10b, a runner 50a communicated with the first coating lip 10c is arranged on the first gasket 50, and the runner 50a is communicated with the glue outlet end of the first pore canal 10a; the second die 20 is provided with a slurry distribution chamber 20a communicating with the first coating slit 10b, the slurry distribution chamber 20a being adapted to feed the first slurry 101, the first slurry 101 being coated onto the substrate 100 via the first coating lip 10 c; a coating assembly 30 is mounted on the first die 10 and protrudes into the first coating slot 10b, the coating assembly 30 being adapted to pass through the second paste 102 and to apply the second paste 102 to both side edges of the first paste 101; a cover assembly 40 is mounted on the first die 10 and communicates with the glue inlet end of the first orifice 10a, the cover assembly 40 being adapted to pass through the third slurry 103 and apply the third slurry 103 to the edge of the second slurry 102.

In this embodiment, the first die 10 may be an upper die, and the second die 20 may be a lower die, which is not limited herein. The height of the first gasket 50 determines the height of the first coating slit 10b, and also affects the thickness of the coating applied on the substrate 100 by the first coating lip 10 c.

Referring primarily to fig. 1, the coating assembly 30 may employ a fluid dispenser or a glue valve 32, etc. capable of controlling the application of a fluid material to the substrate 100, and the coating assembly 40 may employ a fluid dispenser or a glue valve, etc. capable of controlling the application of a fluid material to the substrate 100, without limitation.

It should be noted that, in the present utility model, the first slurry 101 may be a functional coating slurry, the second slurry 102 may be another functional slurry, an auxiliary slurry, an insulating adhesive, etc., and the third slurry 103 may be an insulating adhesive, a third slurry different from the two slurries, etc. Of course, the second slurry 102 and/or the third slurry 103 may be the same functional coating slurry as the first slurry 101, i.e., the coating assembly 30 and/or the cover assembly 40 may also function to compensate for the first slurry 101. For example, when a feathering occurs at the coated edge and a replenishment is desired, then replenishment of the first slurry 101 may be performed by the coating assembly 30, thereby increasing the thickness of the coated edge; when thick edges appear on the coating edges and suction is needed, the first slurry 101 can be extracted through the coating component 30, and the thickness of the edges is reduced; the coating assembly 30 may be mounted at a plurality of locations on the first die 10 or the second die 20 to achieve slurry compensation at that location. In addition, the second paste 102 and the third paste 103 may be different insulating glues, and specific first paste 101, second paste 102 and third paste 103 are not limited herein.

It can be appreciated that the coating component 30 is arranged to realize the coating of the second slurry 102 on the two side edges of the first slurry 101, and the coating component 40 is arranged to realize the further coating of the third slurry 103 on the edge of the second slurry 102, so that the multi-station processing is combined to the same station processing, the production efficiency is greatly improved, the equipment cost investment is reduced, and the labor cost is saved.

In order to improve the convenience of applying the second paste 102 and to facilitate assembling the components, referring mainly to fig. 3, 4 and 6, in one embodiment, the coating assembly 30 may include a fixing base 31, a glue valve 32, a connecting pipe 33 and a hollow T-block 34, the hollow T-block 34 includes a hollow tube 341 and a glue block 342, the glue valve 32 is communicated with the hollow tube 341 through the connecting pipe 33, the hollow tube 341 is fixed on the first die head 10 through the fixing base 31 and extends into the first coating slit 10b, and the glue block 342 is communicated with the hollow tube 341 and is provided with a glue channel. The connecting tube 33 and the hollow tube 341 are respectively provided with a fluid channel, and the glue outlet 342a of the glue channel in the glue block 342 is located at the edge of the coating notch of the first gasket 50, i.e. the edge of the first coating slit 10 b.

In this embodiment, the glue valve 32 may be a standard component, and the specific structure will not be described again. The fixing seat 31 may be hollow and columnar, and hollow may be formed in the front and rear sides, the fixing seat 31 is fixed in the groove of the first die head 10, the upper end of the connecting pipe 33 may be screwed to the outlet of the glue valve 32, the middle section of the connecting pipe 33 penetrates through the fixing seat 31, and the connecting pipe 33 and the hollow pipe 341 may be fixed by screwing. In addition, the lower end of the hollow tube 341 is connected to or integrally formed with the glue spreading block 342, a horizontal glue spreading channel may be disposed in the glue spreading block 342, and a glue outlet 342a of the glue spreading channel of the glue spreading block 342 may be located at one end of the front side of the bottom surface. To ensure uniformity of the thickness of the second paste 102, the glue outlet 342a of the glue channel may be formed in a flared shape.

In order to further enhance the quality of the coating slurry applied by the coating die on the substrate 100 such as a pole piece, please refer to fig. 3 to 7, 21 and 22, in this embodiment, the glue outlet 342a of the glue coating channel of the glue coating block 342 may be located at the edge of the coating gap of the first gasket 50, the glue outlet end of the runner 50a may be located at the edge of the glue outlet 342a of the glue coating channel, so that the second slurry 102 is coated on two side edges of the first slurry 101, and the third slurry 103 is coated on the edge of the second slurry 102.

In order to improve the uniformity of coating, referring mainly to fig. 15 to 20, in an embodiment, the coating die may further include at least one adjusting mechanism 60, wherein the first die 10 is provided with a mounting hole communicating with the first coating slit 10b, and the adjusting mechanism 60 is detachably disposed at the mounting hole of the first die 10 and extends into the first coating slit 10b for adjusting the coating thickness.

Referring mainly to fig. 15 and 16, in the present embodiment, the number of mounting holes may be plural, the adjusting mechanism 60 may be plural, and the coating assembly 30 may be detachably disposed at the mounting hole of the first die head 10. In other words, the coating assembly 30 can be installed on the installation position of the adjusting mechanism 60, and the existing die body structure is not required to be changed, and only the adjusting mechanism 60 is required to be disassembled and the coating assembly 30 is required to be installed. Therefore, the cost of reforming the upper die head is effectively saved.

That is, the coating assembly 30 of the present utility model may be disposed at any one of the mounting positions of the adjusting mechanism 60 to achieve the coating or the material supplementing at the corresponding position, so as to meet different process requirements, for example, the adjusting mechanism 60 replacing the central position of the die head is the coating assembly 30, the coating at the central position of the pole piece may be achieved, the adjusting mechanism 60 replacing the edge position of the die head is the coating assembly 30, and the coating at the edge position of the pole piece may be achieved. The coating assembly 30 is compatible and flexible.

Referring to fig. 18 and 19, in the present embodiment, the adjusting mechanism 60 may include an actuator and a T-shaped cut-off block 62 connected to the actuator, and the T-shaped cut-off block 62 is disposed in the first coating slit 10 b.

In this embodiment, the actuator may be a manually adjusted micro-head 61, an automatically adjusted linear motor, or the like. When the differential head 61 is used as an actuator, the adjustment end of the differential head 61 may be connected to the upper end of the T-shaped shut-off block 62 by a coupling 64. When the motor is used as an actuating mechanism, a displacement sensor and a driving plate can be arranged, the motor and the displacement sensor are respectively connected with the driving plate, the motor drives the T-shaped intercepting block 62 to move through the coupler 64, the displacement sensor detects the adjustment quantity of the T-shaped intercepting block 62, and the driving plate controls the motor to work according to a displacement signal output by the displacement sensor.

It should be noted that since the hollow T-block 34 of the paint assembly 30 is similar in shape and configuration to the T-shaped shut-off block 62 and can be configured identically, the hollow T-block 34 can also be used as the T-shaped shut-off block 62 to save the cost of manufacturing the T-shaped shut-off block 62.

Based on the above embodiments, the present utility model has been further improved: the paint assembly 30 is combined with an adjustment mechanism 60 to achieve slurry compensation and shut-off adjustment functions. The method comprises the following steps:

referring to fig. 1 to 6, 19 and 20, in an embodiment, the actuator may be a micro head 61 or a motor, the micro head 61 or the motor is fixed on the first die head 10 through a mounting seat 63, an output end of the micro head 61 or the motor is connected with a transfer rod 65 through a coupling 64, the transfer rod 65 is connected with the hollow T-block 34, a transfer port 65a is formed on a side wall of the transfer rod 65, and the glue spreading valve 32 is communicated with the transfer port 65a through a pipeline.

On the one hand, the glue spreading valve 32 is communicated with the hollow T-shaped block 34 through the switching rod 65, so that the first sizing agent 101 can be compensated or the second sizing agent 102 can be coated on the edge of the first sizing agent 101; on the other hand, the micro head 61 can drive the hollow T-block 34 to move up and down, and can realize cut-off adjustment, thereby improving the uniformity of coating.

When the hollow T-block 34 is used as the T-shaped cutoff block 62, the spacer below the position of the hollow T-block 34 at the edge of the coating die needs to be hollowed out to accommodate the depressed hollow T-block 34. Referring to fig. 4, 6 and 14, the shim of the coating die edge requires milling half-grooves 50b when slurry compensating the hollow T-block 34.

The present utility model is also suitable for some application scenarios requiring double-layer or multi-layer coating, and the specific structure of the multi-layer coating die can be adaptively referred to the structure of the double-layer coating die, which is not described herein.

Referring to fig. 8 to 13, in an embodiment, the coating die is a dual-layer coating die, the dual-layer coating die further includes a third die 70, the third die 70 is fixedly connected with the second die 20, a second gasket 80 is sandwiched between the third die 70 and the second die 20 to enclose and form a second coating slit, and the third die 70 and the second die 20 form a second coating lip on the discharge side of the second coating slit.

In this embodiment, the first die 10 of the dual coating die may be an upper die, the second die 20 may be a middle die, the third die 70 may be a lower die, the first coating slit 10b may be disposed obliquely, and the second coating slit may be disposed horizontally, which is not limited herein.

In this embodiment, the third die 70 may be provided with the coating component 30, so that the edges of the two layers of the slurry on the substrate 100 may be coated with the second slurry 102 such as insulating glue, thereby further improving the efficiency of production and manufacturing.

In addition, in order to achieve the double-layer multi-material dispensing of the double-layer coating, referring mainly to fig. 10, in an embodiment, the second die 20 may be provided with a second hole 20b, and the glue inlet end of the second hole 20b is disposed corresponding to the glue outlet end of the first hole 10a of the first die and is connected or disconnected by the first gasket 50.

In this embodiment, a glue valve is fixed at the top of the first die 10, the upper die and the middle die are provided with communicated channels, a glue dispensing valve is fixed at the inlet of the first channel 10a of the upper die, the first channel 10a of the upper die is communicated or not communicated with the second channel 20b of the middle die through a first gasket 50 (as shown in fig. 21, if a through hole 50c is provided at the corresponding position of the first gasket 50, the corresponding position of the first gasket 50 is communicated, and if a through hole 50c is not provided at the corresponding position of the first gasket 50, as shown in fig. 22), the glue dispensing valve is connected with a runner 50a on the first gasket 50 through the first channel 10a, and the second paste 102 is extruded adjacently to the edge position of the first paste 101 at the terminal of the coating slit through the runner 50 a.

The double-layer coating die head of the utility model is at least applicable to the following application scenarios:

if only two types of paste are required to be applied on the upper layer, the first gasket 50 may be configured without the through hole 50c, and the second paste 102 in the first duct 10a of the upper die flows only into the flow channel 50a on the first gasket 50, and only the upper layer dispensing is performed.

If both the upper layer and the lower layer are required to be coated with two kinds of slurries, the first gasket 50 may be configured with a through hole 50c, so that the second slurry 102 in the first duct 10a of the upper die head may enter not only the flow channel 50a of the first gasket 50, but also the second duct 20b of the middle die head through the through hole 50c, and further enter the flow channel 50a of the second gasket 80, and dispensing of the upper layer and the lower layer is performed.

If only the lower layer dispensing is needed, the first spacer 50 may be configured with a through hole 50c, but without the runner 50a, only the lower layer dispensing may be realized.

If the lower layer needs to be coated with the first paste 101, the second paste 102 and the third paste 103, the lower die head needs to be modified to have a similar structure to the upper die head described above, so that the upper and lower layers are coated with three pastes.

The present utility model also proposes a coater including a coating die having a specific structure referring to the above embodiment, and since the coater according to the present utility model includes all aspects of all embodiments of the above coating die, it has at least the same technical effects as the above coating die, which are not described herein.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A coating die, comprising:

a first die head (10) provided with a first duct (10 a);

the second die head (20) is fixedly connected with the first die head (10), a first gasket (50) is clamped between the first die head (10) and the second die head (20) so as to enclose and form a first coating slit (10 b) communicated with the first pore canal (10 a), the first die head (10) and the second die head (20) form a first coating lip (10 c) on the discharging side of the first coating slit (10 b), a runner (50 a) communicated with the first coating lip (10 c) is arranged on the first gasket (50), and the runner (50 a) is communicated with the glue outlet end of the first pore canal (10 a); the second die head (20) is provided with a slurry distribution cavity (20 a) communicated with the first coating slit (10 b), the slurry distribution cavity (20 a) is suitable for being filled with a first slurry (101), and the first slurry (101) is coated on a substrate (100) through the first coating lip (10 c);

a coating assembly (30) mounted on the first die (10) and projecting into the first coating slot (10 b), the coating assembly (30) being adapted to pass through a second slurry (102) and to coat the second slurry (102) to both side edges of the first slurry (101); and

and a coating component (40) mounted on the first die head (10) and communicated with the glue inlet end of the first pore canal (10 a), wherein the coating component (40) is suitable for introducing a third slurry (103) and enabling the third slurry (103) to be coated on the edge of the second slurry (102).

2. Coating die according to claim 1, characterized in that the coating assembly (30) comprises a fixed seat (31), a glue valve (32), a connecting pipe (33) and a hollow T-block (34), the hollow T-block (34) comprises a hollow pipe (341) and a glue block (342), the glue valve (32) is communicated with the hollow pipe (341) through the connecting pipe (33), the hollow pipe (341) is fixed on the first die (10) through the fixed seat (31) and extends into a first coating slit (10 b), and the glue block (342) is communicated with the hollow pipe (341) and is provided with a glue coating channel.

3. The coating die according to claim 2, wherein the glue outlet (342 a) of the glue application channel is located at the edge of the coating gap of the first gasket (50), and the glue outlet end of the runner (50 a) is located at the edge of the glue outlet (342 a) of the glue application channel, so that the second paste (102) is coated on both side edges of the first paste (101) and the third paste (103) is coated on the edge of the second paste (102).

4. The coating die according to claim 2, further comprising an adjustment mechanism (60), wherein the first die (10) is provided with a mounting hole communicating with the first coating slot (10 b), and wherein the adjustment mechanism (60) or the coating assembly (30) is detachably provided at the mounting hole and protrudes into the first coating slot (10 b) for adjusting the coating thickness.

5. The coating die of claim 4, wherein the adjustment mechanism (60) comprises an actuator and a T-shaped shut-off block (62) coupled to the actuator, the T-shaped shut-off block (62) being disposed in the first coating slot (10 b).

6. The coating die of claim 5, wherein the hollow T-block (34) is further configured to function as the T-shaped shut-off block (62).

7. The coating die head according to claim 6, wherein the actuating mechanism is a differential head (61) or a motor, the differential head (61) or the motor is fixed on the first die head (10) through a mounting seat (63), an output end of the differential head (61) or the motor is connected with a switching rod (65) through a coupler (64), the switching rod (65) is connected with the hollow T block (34), a switching port (65 a) is formed in a side wall of the switching rod (65), and the glue spreading valve (32) is communicated with the switching port (65 a) through a pipeline.

8. The coating die of claim 1, further comprising a third die (70), wherein the third die (70) is fixedly connected with the second die (20), a second gasket (80) is sandwiched between the third die (70) and the second die (20) to form a second coating slit in a surrounding manner, and the third die (70) and the second die (20) form a second coating lip on the discharge side of the second coating slit.

9. The coating die of claim 8, wherein the third die (70) has the coating assembly (30) disposed thereon; and/or

The second die head (20) is provided with a second pore canal (20 b), and the glue inlet end of the second pore canal (20 b) corresponds to the glue outlet end of the first pore canal (10 a) and is communicated or not communicated through the first gasket (50).

10. A coater comprising a coating die as set forth in any one of claims 1-9.