CN219092567U

CN219092567U - Anti-blocking slit type coating head

Info

Publication number: CN219092567U
Application number: CN202223467610.1U
Authority: CN
Inventors: 陈道远; 张建民; 陶晓亮
Original assignee: Jitu Automation Technology Suzhou Co ltd
Current assignee: Jitu Automation Technology Suzhou Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-30
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses an anti-blocking slit type coating head, which belongs to the technical field of coating equipment and comprises a coating head body, wherein the coating head body comprises an upper die head and a lower die head, the upper die head is detachably connected with the lower die head, a liquid containing cavity is formed between the lower die head and the upper die head, one sides of the upper die head and the lower die head are respectively provided with an upper lip and a lower lip, a liquid outlet slit is formed between the upper lip and the lower lip, the lower die head is provided with a glue solution feeding port, the glue solution feeding port is communicated with a solution cavity through a feeding guide channel, the liquid outlet slit is communicated with the solution cavity through a liquid outlet guide channel, and the glue solution feeding port is connected with an external glue supply unit; the liquid outlet slit is provided with an opening and closing structure; the influence of foreign particles (and contact with external air) in the coating head is reduced, and the silting condition in the coating head is reduced, so that the quality of a product is further ensured, the waste is reduced, and the cost is reduced.

Description

Anti-blocking slit type coating head

Technical Field

The utility model belongs to the technical field of coating equipment, and particularly relates to an anti-blocking slit type coating head.

Background

Slit coating (SDC) represents future development of wet coating due to the characteristics of high coating speed, good coating uniformity, wide coating window and the like. The application field of SDC has been shifted from traditional film and paper making to new energy fields, especially the coating of solar cell box lithium-ion battery pole pieces.

However, there are many factors in the coating process, such as dot defects formed on the surface of the coating film, and the reasons for forming the dot defects are two: firstly, bubble generation (stirring process, transportation process, coating process); secondly, various particles (dust, glue clusters, greasy dirt, etc.) are generated. The presence of foreign particles can cause the presence of areas of low surface tension in the wet film at the surface of the particles, and the liquid film migrates radially around the particles, forming punctiform defects.

The utility model improves the slit coating head, reduces the influence of external particles in the coating head, and reduces the formation of punctiform defects, thereby improving the product yield and reducing the manufacturing cost.

Disclosure of Invention

The utility model mainly solves the technical problem of providing an anti-blocking slit type coating head, which reduces the influence of external particles (and contact with external air) in the coating head and reduces the silting condition in the coating head, thereby further ensuring the quality of products, reducing waste and lowering cost.

In order to solve the technical problems, the utility model adopts a technical scheme that:

the anti-blocking slit type coating head comprises a coating head body, wherein the coating head body comprises an upper die head and a lower die head, the upper die head is detachably connected with the lower die head, a liquid containing cavity is formed between the upper die head and the lower die head, an upper lip and a lower lip are respectively formed on one side of the upper die head and one side of the lower die head, a liquid outlet slit is formed between the upper lip and the lower lip, a glue solution feeding port is formed in the lower die head, the glue solution feeding port is communicated with the solution cavity through a feeding guide channel, the liquid outlet slit is communicated with the solution cavity through a liquid outlet guide channel, and the glue solution feeding port is connected with an external glue supply unit;

the glue supply unit is characterized in that the glue outlet slot is provided with an opening and closing structure, when the glue supply unit stops supplying glue, the glue outlet slot is in a closed state, and when the glue supply unit supplies glue, the glue outlet slot is in an open state.

Further, the opening and closing structure comprises a rectangular groove and a baffle plate, wherein the rectangular groove and the baffle plate are arranged along the extending direction of the lower lip, one side of the baffle plate is rotationally connected to the top of the rectangular groove, an elastic piece is arranged between the baffle plate and the rectangular groove, and the elastic piece always provides an upward spring force.

Further, the cross section of the liquid outlet diversion channel is gradually narrowed from inside to outside.

Further, a sealing gasket is arranged between the upper die head and the lower die head.

Further, the upper die head is hinged with one side of the lower die head.

Further, the coating head body further comprises an exhaust mechanism.

The beneficial technical effects of the utility model are as follows:

1. by arranging the independent upper die head and the independent lower die head, the opening between the upper die head and the lower die head is realized, so that the cleaning of an internal cavity or a channel is facilitated, and one side is hinged, so that the opening or the closing is facilitated;

2. because the liquid outlet slot is provided with the opening and closing mechanism, when the glue supply unit supplies glue, the glue solution in the solution cavity flows to the liquid outlet slot and downwards extrudes the baffle plate, so that liquid outlet can be realized; when the glue supply unit stops supplying glue, the glue solution does not flow any more, so that the blocking piece loses the pressure applied to the glue solution and recovers the position of the blocking piece through the elastic piece to block the liquid outlet, and the contact between the glue solution in the glue supply unit and the outside air is reduced.

3. The cross section of the liquid outlet flow guide channel is gradually narrowed from inside to outside, so that the glue solution can be smoothly discharged, and a better liquid outlet effect is realized;

in summary, the utility model has simple structure and convenient operation, and reduces the influence of external particles (and contact with external air) in the coating head by improving the slit coating head, thereby reducing the formation of punctiform defects, improving the product yield and reducing the manufacturing cost.

Drawings

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model (upper die turned up);

FIG. 3 is a schematic overall cross-sectional view of the present utility model;

the parts in the drawings are marked as follows:

1. an upper die head; 11. an upper lip; 12. a glue solution feed port; 2. a lower die head; 21. a lower lip; 3. a solution chamber; 4. a liquid outlet slit; 5. a feed diversion channel; 6. a liquid outlet diversion channel; 7. an opening and closing structure; 71. rectangular grooves; 72. a baffle; 73. an elastic member; 8. and a sealing gasket.

Detailed Description

In order that the manner in which the above recited features of the present utility model are attained and can be understood in detail, a more particular description of the utility model, briefly summarized below, may be had by reference to the appended drawings and examples, which are illustrated in their embodiments, but are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The embodiment discloses an anti-blocking slit type coating head in detail, as shown in fig. 1 to 3, the anti-blocking slit type coating head comprises a coating head body, wherein the coating head body comprises an upper die head 1 and a lower die head 2, the upper die head is detachably connected with the lower die head, a liquid containing cavity 3 is formed between the upper die head and the lower die head, an upper lip 11 and a lower lip 21 are respectively formed on one side of the upper die head and one side of the lower die head, a liquid outlet slit 4 is formed between the upper lip and the lower lip, a liquid solution feeding port 12 is formed in the lower die head, the liquid outlet slit is communicated with the solution cavity through a liquid outlet flow guide channel 5, the liquid outlet slit is communicated with the solution cavity through a liquid outlet flow guide channel 6, and the liquid solution feeding port is connected with an external glue supply unit;

the glue solution feeding port is an inlet for feeding the glue solution into the solution cavity, and the liquid outlet slit is an outlet for discharging the glue solution from the solution cavity from the coating head body.

The liquid outlet slit is provided with an opening and closing structure, when the glue supply unit stops supplying glue, the liquid outlet slit is in a closed state, and when the glue supply unit supplies glue, the liquid outlet slit is in an open state, so that contact between glue solution and air is reduced, solidification of the glue solution is effectively prevented, and blocking is reduced.

Preferably, the opening and closing structure includes a rectangular groove 71 and a baffle 72 disposed along the extending direction of the lower lip, one side of the baffle is rotatably connected to the top of the rectangular groove, and an elastic member 73 is disposed between the baffle and the rectangular groove, and the elastic member always provides an upward spring force.

Preferably, the cross section of the liquid outlet flow guide channel is gradually narrowed from inside to outside, so that liquid outlet is smoother.

Preferably, a sealing gasket 8 is arranged between the upper die head and the lower die head, so that the internal sealing performance is enhanced.

Preferably, the upper die head is hinged with one side of the lower die head, and the sealing connection between the upper die head and the lower die head is realized through other structures (not shown in the figure, the structures can be bolts, key connection or buckles and the like).

Preferably, the coating head body further includes an exhaust mechanism (not shown) to reduce the generation of bubbles.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present utility model, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. The utility model provides an anti-blocking slit type coating head, includes coating head body, its characterized in that: the coating head body comprises an upper die head (1) and a lower die head (2), the upper die head is detachably connected with the lower die head, a solution cavity (3) is formed between the upper die head and the lower die head, an upper lip (11) and a lower lip (21) are respectively formed on one side of the upper die head and one side of the lower die head, a liquid outlet slit (4) is formed between the upper lip and the lower lip, a glue solution feeding port (12) is formed in the lower die head, the glue solution feeding port is communicated with the solution cavity through a feeding guide channel (5), the liquid outlet slit is communicated with the solution cavity through a liquid outlet guide channel (6), and the glue solution feeding port is connected with an external glue supply unit;

2. An anti-clogging slit coating head as in claim 1, wherein: the opening and closing structure comprises a rectangular groove (71) and a baffle (72) which are arranged along the extending direction of the lower lip, one side of the baffle is rotationally connected to the top of the rectangular groove, an elastic piece (73) is arranged between the baffle and the rectangular groove, and the elastic piece always provides an upward spring force.

3. An anti-clogging slit coating head as in claim 1, wherein: the cross section of the liquid outlet flow guide channel is gradually narrowed from inside to outside.

4. An anti-clogging slit coating head as in claim 1, wherein: a sealing gasket (8) is arranged between the upper die head and the lower die head.

5. An anti-clogging slit coating head as in claim 1, wherein: the upper die head is hinged with one side of the lower die head.

6. An anti-clogging slit coating head as in claim 1, wherein: the coating head body further comprises an exhaust mechanism.