CN217069446U - Four-layer coating die head - Google Patents

Abstract

The utility model discloses a four-layer coating die head, which comprises a first die head, a second die head, a third die head, a fourth die head and a fifth die head, wherein the first die head is fixedly connected with the first die head, and a first gasket is clamped between the first die head and the second die head so as to form a first coating slit; a second gasket is clamped between the second die head and the third die head to form a second coating slit; a third gasket is clamped between the third die head and the fourth die head to form a third coating slit; and a fourth gasket is clamped between the fourth die head and the fifth die head to form a fourth coating slit. The utility model provides a four-layer coating die head has realized the multilayer coating, has also realized the multilayer point simultaneously and has glued, can adjust coating thickness, has promoted the homogeneity of coating, has greatly improved production efficiency.

Description

Four-layer coating die head

Technical Field

The utility model relates to a coating unit technical field especially relates to a four-layer coating die head.

Background

Slit extrusion coating is a precise wet coating technique, and the working principle of the slit extrusion coating is that slurry is extruded and sprayed along a gap of a coating die head under a certain pressure and a certain flow rate and is transferred to 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, so that pollutants can be prevented from entering the coating process, the utilization rate of the slurry is high, the stable property of the slurry can be kept, and the coating system can adapt to different slurry viscosity and solid content ranges.

The coating die head is composed of an upper die head, a lower die head and a gasket clamped in the upper die head, a distribution cavity is formed in the lower die head, slurry enters the distribution 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 the upper die head, the lower die head and the gasket in a surrounding mode, the slurry is extruded from a lip opening to a base material on a coating roller through the coating slit, a functional layer is formed on the base material, and for example, negative electrode slurry is coated on a copper foil to form a battery negative electrode sheet; and coating the positive electrode slurry on the aluminum foil to form the battery positive electrode plate.

At present, according to different process requirements of battery pole pieces, single-layer, double-layer or multi-layer slurry is required to be coated on a base material, so that the battery pole pieces have different functional coatings.

Most of the existing coating dies are single-layer coating dies, namely, after a layer of slurry is coated on a substrate, the single-layer coating dies are dried, and then a second layer is coated on the substrate again, and the steps are repeated. Although, in an exemplary technique, there is also a simultaneous coating of two layers of slurry using a two-layer coating die, the simultaneous coating of more layers of slurry is still not satisfactory and the coating efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a four-layer coating die head, aims at improving coating efficiency.

In order to achieve the above object, the utility model provides a four-layer coating die head, include:

a first die head;

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 to form a first coating slit, and the second die head is provided with a first distribution cavity communicated with the first coating slit and a first feeding hole communicated with the first distribution cavity;

the third die head is fixedly connected with the second die head, a second gasket is clamped between the second die head and the third die head to form a second coating slit, and the third die head is provided with a second distribution cavity communicated with the second coating slit and a second feed inlet communicated with the second distribution cavity;

the fourth die head is fixedly connected with the third die head, a third gasket is clamped between the third die head and the fourth die head to form a third coating slit, and the fourth die head is provided with a third distribution cavity communicated with the third coating slit and a third feeding port communicated with the third distribution cavity; and

and the fifth die head is fixedly connected with the fourth die head, a fourth gasket is clamped between the fourth die head and the fifth die head so as to form a fourth coating slit, and the fifth die head is provided with a fourth distribution cavity communicated with the fourth coating slit and a fourth feeding hole communicated with the fourth distribution cavity.

Optionally, the four-layer coating die head further comprises a plurality of first adjusting assemblies, and the first adjusting assemblies are arranged on the first die head at intervals and respectively extend into the first coating slits, so that the thickness of the coating layer can be adjusted by changing the transverse area density of the first coating slits.

Optionally, the first adjusting assemblies each include a differential head, a coupler, an adjusting rod and a flow blocking block, the first die head is provided with a slot for the adjusting rod to be inserted into, the lower end of the first die head is provided with a containing groove for at least partially containing the flow blocking block, two ends of the containing groove are respectively communicated with the slot and the first coating slit, the upper end of the flow blocking block is connected with the lower end of the adjusting rod, and the upper end of the adjusting rod is connected with the differential head through the coupler.

Optionally, the first adjusting assemblies respectively include a driving plate, a linear motor, a coupler, an adjusting rod and a flow blocking block, the driving plate is electrically connected to the linear motor, the linear motor is mounted on the first die head and is in driving connection with the adjusting rod through the coupler, a slot for the adjusting rod to be inserted into is formed in the first die head, a containing groove for at least partially containing the flow blocking block is formed in the lower end of the first die head, two ends of the containing groove are respectively communicated with the slot and the first coating slit, and the upper end of the flow blocking block is connected to the lower end of the adjusting rod.

Optionally, the side walls of the choke blocks of two adjacent first adjusting assemblies are arranged in close proximity.

Optionally, the four-layer coating die head further comprises a plurality of second adjusting assemblies, and the plurality of second adjusting assemblies are arranged on the fifth die head at intervals and used for adjusting the lip height of the discharge side of the fourth coating slot.

Optionally, the second adjusting assemblies each include a push rod and a pull rod, a groove extending along a height direction of the fifth die head is formed in the bottom end of the fifth die head, a mounting hole extending along a width direction of the fifth die head is formed in the back side of the fifth die head, the mounting hole penetrates through the groove, and the push rod and the pull rod are mounted in the mounting hole and used for pushing or pulling the groove to deform so as to adjust the lip height of the discharge side of the fourth coating slit.

Optionally, the first die head is provided with a plurality of first dispensing holes suitable for introducing insulating glue, and the first gasket is provided with a first dispensing flow channel communicated with the first dispensing holes; and/or

The second die head is provided with a plurality of second glue dispensing holes suitable for introducing insulating glue, and the second gasket is provided with a second glue dispensing flow channel communicated with the second glue dispensing holes; and/or

The third die head is provided with a plurality of third glue dispensing holes suitable for introducing insulating glue, and the third gasket is provided with a third glue dispensing flow channel communicated with the third glue dispensing holes; and/or

And the fourth die head is provided with a plurality of fourth glue holes suitable for introducing insulating glue, and the fourth gasket is provided with a fourth glue dispensing flow channel communicated with the fourth glue holes.

Optionally, a first supporting member is arranged in the first distribution cavity to support the first gasket; and/or

A second support member is arranged in the second distribution cavity to support the second gasket; and/or

A third supporting piece is arranged in the third distribution cavity to support the third gasket; and/or

And a fourth supporting piece is arranged in the fourth distribution cavity to support the fourth gasket.

Optionally, the first feed opening is disposed at a back side of the second die head, the second feed opening is disposed at a back side of the third die head, the third feed opening is disposed at a back side of the fourth die head, and the fourth feed opening is disposed at a lower side of the fifth die head.

In the technical scheme of the utility model, the four-layer coating die head comprises a first die head, a second die head, a third die head, a fourth die head and a fifth die head, the second die head is fixedly connected with the first die head, and a first gasket is clamped between the first die head and the second die head so as to form a first coating slit, the second die head is provided with a first distribution cavity communicated with the first coating slit and a first feeding hole communicated with the first distribution cavity; the third die head is fixedly connected with the second die head, a second gasket is clamped between the second die head and the third die head to form a second coating slit, and the third die head is provided with a second distribution cavity communicated with the second coating slit and a second feed inlet communicated with the second distribution cavity; the fourth die head is fixedly connected with the third die head, a third gasket is clamped between the third die head and the fourth die head to form a third coating slit, and the fourth die head is provided with a third distribution cavity communicated with the third coating slit and a third feeding port communicated with the third distribution cavity; the fifth die head and the fourth die head are fixedly connected, a fourth gasket is clamped between the fourth die head and the fifth die head to form a fourth coating slit, and the fifth die head is provided with a fourth distribution cavity communicated with the fourth coating slit and a fourth feeding hole communicated with the fourth distribution cavity. It can be understood that the slurry in the first distribution chamber is extrusion coated from the first coating slot onto the substrate coated on the backing roll, the slurry in the second distribution chamber is extrusion coated from the second coating slot onto the substrate, the slurry in the third distribution chamber is extrusion coated from the third coating slot onto the substrate, and the slurry in the fourth distribution chamber is extrusion coated from the fourth coating slot onto the substrate, so that four-layer coating is realized, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of one embodiment of a four-layer coating die of the present invention;

FIG. 2 is a side view of one embodiment of a four-layer coating die of the present invention;

FIG. 3 is a top view of one embodiment of a four-layer coating die of the present invention;

FIG. 4 is a rear view of one embodiment of a four-layer coating die of the present invention;

fig. 5 is a first cross-sectional view of an embodiment of a four-layer coating die of the present invention;

fig. 6 is a second cross-sectional view of an embodiment of a four-layer coating die of the present invention.

The reference numbers illustrate:

10. a first die head; 20. a second die head; 30. a third die head; 40. a fourth die head; 50. a fifth die head; 100a, a first coating slit; 100b, a second coating slit; 100c, a third coating slit; 100d, a fourth coating slit; 200a, a first distribution chamber; 200b, a second distribution chamber; 200c, a third distribution cavity; 200d, a fourth distribution cavity; 300a, a first feed inlet; 300b, a second feed inlet; 300c, a third feed inlet; 300d and a fourth feed inlet; 60. a first adjustment assembly; 61. differentiating the head; 62. a coupling; 63. an adjusting lever; 64. a flow choking block; 70. a second adjustment assembly; 51a, a groove; 52b, mounting holes; 400a, a first dispensing hole; 400b, a second glue dispensing hole; 400c, a third glue hole; 400d, fourth glue holes; 101. a first support member; 102. a second support member; 103. a third support member; 104. a fourth support member; 11a and a mounting groove.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a four layers of coating die heads can be applied to coating unit, especially high temperature thick liquids coating unit, and here is not limited.

Referring to fig. 1 to 5, in an embodiment of the present invention, the four-layer coating die includes a first die 10, a second die 20, a third die 30, a fourth die 40 and a fifth die 50, the second die 20 is fixedly connected to the first die 10, and a first gasket is sandwiched between the first die 10 and the second die 20 to form a first coating slit 100a, the second die 20 is provided with a first distribution cavity 200a communicated with the first coating slit 100a and a first feeding hole 300a communicated with the first distribution cavity 200 a; the third die head 30 is fixedly connected to the second die head 20, and a second shim is interposed between the second die head 20 and the third die head 30 to form a second coating slit 100b, and the third die head 30 is provided with a second distribution cavity 200b communicated with the second coating slit 100b and a second feed opening 300b communicated with the second distribution cavity 200 b; the fourth die head 40 is fixedly connected with the third die head 30, a third gasket is clamped between the third die head 30 and the fourth die head 40 to form a third coating slit 100c, and the fourth die head 40 is provided with a third distribution cavity 200c communicated with the third coating slit 100c and a third feeding port 300c communicated with the third distribution cavity 200 c; the fifth die head 50 and the fourth die head 40 are connected and fixed, a fourth gasket is clamped between the fourth die head 40 and the fifth die head 50 to form a fourth coating slit 100d, and the fifth die head 50 is provided with a fourth distribution cavity 200d communicated with the fourth coating slit 100d and a fourth feeding hole 300d communicated with the fourth distribution cavity 200 d.

In this embodiment, the first die head 10, the second die head 20, the third die head 30, the fourth die head 40, and the fifth die head 50 may be sequentially connected and fixed from bottom to top via a back plate. Wherein, the dorsal part of first die head 10 and second die head 20 all can set up the face of lining up, when two faces of lining up are in the coplanar, the lip of first die head 10 and second die head 20 front end aligns, all can set up the screw hole on two faces of lining up, sets up assorted screw hole on the backplate equally, locks the backplate on the face of lining up, can guarantee that two faces of lining up are in the coplanar, through locking the backplate, guarantee that the lip of front end aligns to ensure coating quality. Similarly, the connection between the second die 20 and the third die 30, the connection between the third die 30 and the fourth die 40, and the connection between the fourth die 40 and the fifth die 50 may also be fixed in the above manner.

Referring mainly to fig. 2, in the present embodiment, the first feed opening 300a may be provided at a back side of the second die 20, the second feed opening 300b may be provided at a back side of the third die 30, the third feed opening 300c may be provided at a back side of the fourth die 40, and the fourth feed opening 300d may be provided at a lower side of the fifth die 50. Therefore, a plurality of sizing agents can be conveniently led in, and meanwhile, installation space can be reserved for other parts of the coating die head, so that more functions can be realized.

In the technical solution of the present invention, the four-layer coating die head includes a first die head 10, a second die head 20, a third die head 30, a fourth die head 40 and a fifth die head 50, the second die head 20 is connected and fixed with the first die head 10, and a first gasket is clamped between the first die head 10 and the second die head 20 to form a first coating slit 100a, the second die head 20 is provided with a first distribution cavity 200a communicated with the first coating slit 100a and a first feeding hole 300a communicated with the first distribution cavity 200 a; the third die head 30 is fixedly connected to the second die head 20, and a second shim is interposed between the second die head 20 and the third die head 30 to form a second coating slit 100b, and the third die head 30 is provided with a second distribution cavity 200b communicated with the second coating slit 100b and a second feed opening 300b communicated with the second distribution cavity 200 b; the fourth die head 40 is fixedly connected with the third die head 30, a third gasket is clamped between the third die head 30 and the fourth die head 40 to form a third coating slit 100c, and the fourth die head 40 is provided with a third distribution cavity 200c communicated with the third coating slit 100c and a third feeding port 300c communicated with the third distribution cavity 200 c; the fifth die head 50 and the fourth die head 40 are connected and fixed, a fourth gasket is clamped between the fourth die head 40 and the fifth die head 50 to form a fourth coating slit 100d, and the fifth die head 50 is provided with a fourth distribution cavity 200d communicated with the fourth coating slit 100d and a fourth feeding hole 300d communicated with the fourth distribution cavity 200 d. It can be understood that the slurry in the first distribution chamber 200a is extrusion coated from the first coating slit 100a onto the substrate coated on the backing roll, the slurry in the second distribution chamber 200b is extrusion coated from the second coating slit 100b onto the substrate, the slurry in the third distribution chamber 200c is extrusion coated from the third coating slit 100c onto the substrate, and the slurry in the fourth distribution chamber 200d is extrusion coated from the fourth coating slit 100d onto the substrate, so that four-layer coating is realized and the production efficiency is improved.

In order to improve the uniformity of coating, referring to fig. 1 and 6, in an embodiment, the four-layer coating die head may further include a plurality of first adjusting assemblies 60, the plurality of first adjusting assemblies 60 are disposed on the first die head 10 at intervals and respectively extend into the first coating slits 100a for adjusting the thickness of the coating layer by changing the transverse areal density of the first coating slits 100 a.

Referring to fig. 6, in the present embodiment, each of the first adjusting assemblies 60 may include a differential head 61, a coupler 62, an adjusting rod 63 and a choke block 64, the first die head 10 is provided with a slot for the adjusting rod 63 to be inserted, the lower end of the first die head 10 is provided with an accommodating slot for accommodating at least part of the choke block 64, two ends of the accommodating slot are respectively communicated with the slot and the first coating slit 100a, the upper end of the choke block 64 is connected with the lower end of the adjusting rod 63, and the upper end of the adjusting rod 63 is connected with the differential head 61 through the coupler 62.

Wherein, the first die head 10 may be provided with a mounting groove 11a for mounting the receiving coupling 62. In this way, space at the top of the first die 10 can be saved.

Or, in another embodiment, the first adjusting assembly 60 may include a driving plate, a linear motor, a coupler 62, an adjusting rod 63, and a choke block 64, the driving plate is electrically connected to the linear motor, the linear motor is mounted on the first die head 10 and is drivingly connected to the adjusting rod 63 through the coupler 62, the first die head 10 is provided with a slot for the adjusting rod 63 to be inserted into, the lower end of the first die head 10 is provided with an accommodating groove for at least partially accommodating the choke block 64, two ends of the accommodating groove are respectively communicated with the slot and the first coating slit 100a, and an upper end of the choke block 64 is connected to a lower end of the adjusting rod 63. Therefore, the coating thickness can be automatically adjusted, the automation degree of the coating process is improved, the production efficiency of the coating process is greatly improved, and the intensity of manual operation is reduced.

It should be noted that, in order to achieve better coating effect and make the coating on the substrate more uniform, in this embodiment, the side walls of the flow blocking blocks 64 of two adjacent first adjusting assemblies 60 can be closely arranged.

Referring to fig. 5 and 6, in an embodiment, the four-layer coating die may further include a plurality of second adjusting assemblies 70, and the plurality of second adjusting assemblies 70 are spaced apart on the fifth die 50 for adjusting the lip height of the discharge side of the fourth coating slit 100 d.

In this embodiment, the second adjusting assembly 70 may include a push rod and a pull rod, the bottom end of the fifth die 50 is provided with a groove 51a extending along the height direction thereof, the back side of the fifth die 50 is provided with a mounting hole 52b extending along the width direction thereof, the mounting hole 52b penetrates through the groove 51a, and the push rod and the pull rod are installed in the mounting hole 52b for pushing or pulling the groove 51a to deform so as to adjust the lip height of the discharge side of the fourth coating slit 100 d.

The push rod and the pull rod may adopt different rod-shaped structures to realize the deformation of the push and pull groove 51a, and may also adopt a push-pull rod assembly structure capable of performing two actions of pushing and pulling to realize the deformation of the push and pull groove 51a, which is not limited specifically here.

It can be understood that the width of the groove 51a can be adjusted by pushing the push rod or pulling the pull rod, so as to achieve upward or downward warping of the lower die lip, and further change the height of the fourth coating slit 100d, thereby adjusting the thickness of the partial coating and improving the uniformity of the coating.

In some exemplary technologies, after coating is completed, insulating glue needs to be coated on two sides of a slurry coating layer by using a glue dispensing device, and the process steps are performed, so that the production period of the battery pole piece is long. Therefore, the utility model discloses coating die structure has further been improved to further promote the efficiency of manufacturing.

Referring to fig. 3 and 4, in an embodiment, the first die head 10 is provided with a plurality of first dispensing holes 400a adapted to introduce the insulating glue, and the first gasket is provided with a first dispensing flow channel communicated with the first dispensing holes 400 a; and/or the second die head 20 is provided with a plurality of second dispensing holes 400b suitable for introducing insulating glue, and the second gasket is provided with a second dispensing runner communicated with the second dispensing holes 400 b; and/or the third die head 30 is provided with a plurality of third glue holes 400c suitable for introducing insulating glue, and the third gasket is provided with a third glue dispensing flow channel communicated with the third glue holes 400 c; and/or the fourth die head 40 is provided with a plurality of fourth glue holes 400d suitable for introducing insulating glue, and the fourth gasket is provided with a fourth glue dispensing flow channel communicated with the fourth glue holes 400 d.

In this embodiment, glue valves may be installed at the first glue dispensing hole 400a, the second glue dispensing hole 400b, the third glue dispensing hole 400c, and the fourth glue dispensing hole 400d, so as to control the on/off or the glue dispensing amount of the glue dispensing through the glue dispensing valves.

In order to prevent the insulating paste from deforming the gasket when the dispensing flow path passes through, and thus improve the uniformity of coating, referring to fig. 6, in an embodiment, a first supporting member 101 may be disposed in the first dispensing chamber 200a to support the first gasket; and/or a second support 102 may be disposed within the second distribution chamber 200b to support a second gasket; and/or a third support 103 may be provided in the third distribution chamber 200c to support a third gasket; and/or a fourth support 104 may be provided within the fourth distribution chamber 200d to support a fourth gasket.

In this embodiment, the material of the supporting member may preferably be metal, and is not limited herein.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (10)

1. A four-layer coating die comprising:

a first die (10);

the second die head (20) is fixedly connected with the first die head (10), a first gasket is clamped between the first die head (10) and the second die head (20) to form a first coating slit (100a), and the second die head (20) is provided with a first distribution cavity (200a) communicated with the first coating slit (100a) and a first feeding hole (300a) communicated with the first distribution cavity (200 a);

a third die head (30) connected and fixed to the second die head (20), a second shim being interposed between the second die head (20) and the third die head (30) to form a second coating slit (100b), the third die head (30) being provided with a second distribution chamber (200b) communicating with the second coating slit (100b) and a second feed opening (300b) communicating with the second distribution chamber (200 b);

the fourth die head (40) is fixedly connected with the third die head (30), a third gasket is clamped between the third die head (30) and the fourth die head (40) to form a third coating slit (100c), and the fourth die head (40) is provided with a third distribution cavity (200c) communicated with the third coating slit (100c) and a third feeding port (300c) communicated with the third distribution cavity (200 c); and

the fifth die head (50) is fixedly connected with the fourth die head (40), a fourth gasket is clamped between the fourth die head (40) and the fifth die head (50) to form a fourth coating slit (100d), and the fifth die head (50) is provided with a fourth distribution cavity (200d) communicated with the fourth coating slit (100d) and a fourth feeding hole (300d) communicated with the fourth distribution cavity (200 d).

2. The four-layer coating die of claim 1, further comprising a plurality of first regulating members (60), the plurality of first regulating members (60) being disposed at intervals on the first die (10) and respectively protruding into the first coating slits (100a) for regulating a coating thickness by changing a transverse areal density of the first coating slits (100 a).

3. The four-layer coating die head according to claim 2, wherein the first adjusting assemblies (60) each comprise a micro-dividing head (61), a coupler (62), an adjusting rod (63) and a flow blocking block (64), the first die head (10) is provided with a slot for the adjusting rod (63) to be inserted, the lower end of the first die head (10) is provided with a containing slot for at least partially containing the flow blocking block (64), two ends of the containing slot are respectively communicated with the slot and the first coating slit (100a), the upper end of the flow blocking block (64) is connected with the lower end of the adjusting rod (63), and the upper end of the adjusting rod (63) is connected with the micro-dividing head (61) through the coupler (62).

4. The four-layer coating die head of claim 2, wherein the first adjusting assemblies (60) each comprise a driving plate, a linear motor, a coupler (62), an adjusting rod (63) and a choke block (64), the driving plate is electrically connected with the linear motor, the linear motor is mounted on the first die head (10) and is in driving connection with the adjusting rod (63) through the coupler (62), the first die head (10) is provided with a slot for the adjusting rod (63) to be inserted, the lower end of the first die head (10) is provided with a containing groove for at least partially containing the choke block (64), two ends of the containing groove are respectively communicated with the slot and the first coating slit (100a), and the upper end of the choke block (64) is connected with the lower end of the adjusting rod (63).

5. The four-layer coating die of claim 3 or 4, wherein the side walls of the flow-blocking blocks (64) of two adjacent first regulating assemblies (60) are arranged in close proximity.

6. The quadruple coating die of claim 1, further comprising a plurality of second adjusting assemblies (70), wherein a plurality of second adjusting assemblies (70) are arranged on the fifth die (50) at intervals for adjusting the lip height of the discharge side of the fourth coating slot (100 d).

7. The four-layer coating die head according to claim 6, wherein the second adjusting assemblies (70) each comprise a push rod and a pull rod, the bottom end of the fifth die head (50) is provided with a groove (51a) extending along the height direction thereof, the back side of the fifth die head (50) is provided with a mounting hole (52b) extending along the width direction thereof, the mounting hole (52b) is arranged to penetrate through the groove (51a), and the push rod and the pull rod are mounted in the mounting hole (52b) for pushing or pulling the groove (51a) to deform so as to adjust the lip height of the discharge side of the fourth coating slit (100 d).

8. The four-layer coating die head of claim 1, wherein the first die head (10) is provided with a plurality of first dispensing holes (400a) suitable for introducing insulating glue, and the first gasket is provided with a first dispensing flow channel communicated with the first dispensing holes (400 a); and/or

The second die head (20) is provided with a plurality of second glue dispensing holes (400b) suitable for introducing insulating glue, and the second gasket is provided with a second glue dispensing flow channel communicated with the second glue dispensing holes (400 b); and/or

The third die head (30) is provided with a plurality of third glue holes (400c) suitable for introducing insulating glue, and the third gasket is provided with a third glue dispensing flow channel communicated with the third glue holes (400 c); and/or

The fourth die head (40) is provided with a plurality of fourth glue holes (400d) suitable for introducing insulating glue, and the fourth gasket is provided with a fourth glue dispensing flow channel communicated with the fourth glue holes (400 d).

9. The four-layer coating die of claim 1, wherein a first support (101) is provided in the first distribution chamber (200a) to support the first shim; and/or

A second support member (102) is arranged in the second distribution cavity (200b) to support the second gasket; and/or

A third support (103) is arranged in the third distribution chamber (200c) to support the third gasket; and/or

A fourth support (104) is provided in the fourth distribution chamber (200d) to support the fourth gasket.

10. The four-layer coating die of claim 1, wherein the first feed opening (300a) is provided at a back side of the second die (20), the second feed opening (300b) is provided at a back side of the third die (30), the third feed opening (300c) is provided at a back side of the fourth die (40), and the fourth feed opening (300d) is provided at a lower side of the fifth die (50).

Images