CN216988331U - Porous base film's of infiltration type dimple coating device - Google Patents

Abstract

The utility model discloses a micro-concave coating device for a permeable porous base membrane, which comprises an unwinding mechanism, a roller passing mechanism, a coating mechanism, a drying box, a winding mechanism and a base membrane body, wherein the base membrane body is arranged among the unwinding mechanism, the roller passing mechanism, the coating mechanism, the drying box and the winding mechanism, the coating mechanism comprises a micro-concave roller coating assembly and a reticulate pattern turning roller assembly, the micro-concave roller coating assembly comprises a material groove and a micro-concave roller body, and the reticulate pattern turning roller assembly comprises a reticulate pattern roller, a scraper and a material receiving disc. According to the utility model, through the arrangement mode that the micro concave roller coating assembly and the anilox turning roller assembly are matched, deformation and improvement of a conventional micro concave coating mode are realized, slurry on the back surface of the base film body is filled into a thread gap or a concave pit of the anilox roller to form a liquid film, so that the back surface of the base film body is conveniently coated, and simultaneously ninety-degree turning of the base film body is facilitated, and the double-side coating of the base film body is more uniform.

Description

Porous base film's of infiltration type dimple coating device

Technical Field

The utility model relates to the field of coating, in particular to a micro-concave coating device of a permeable porous base membrane.

Background

In recent years, with the strict requirements of materials, a composite material with certain function or functions is coated and manufactured on a porous medium substrate, in the textile industry, a silicon carbide coating provides heat insulation for sportswear, a polyurethane coating is used for increasing the air permeability and waterproof performance of clothes, in the battery manufacturing field, a polymer electrolyte membrane is directly coated on a porous catalytic gas diffusion layer to manufacture a membrane electrolyte component of a PEM fuel cell, and in the lithium battery diaphragm manufacturing field, alumina and boehmite particles are coated on a polyolefin porous diaphragm to improve the high temperature resistance and electrolyte absorption performance of the traditional polyolefin diaphragm.

Because some slurry particles have a particle size larger than the pore size of the base film and water has poor wettability to some base films during the coating process, the particulate material and water do not enter the micropores of the base film in a large amount during the coating and drying processes, or some small particle coating slurry can permeate into the non-woven fabric or the base film and reach the back of the non-woven fabric or the base film to contact with a coating roller, a roller or a roller in a drying box, which becomes an interference factor for damaging the coating and drying, so that the coating cannot be performed, as shown in the conventional dimple coating manner in fig. 1.

When organic solvents which have good wettability with a base film, such as N-methyl pyrrolidone NMP, N-dimethyl formamide DMF, N, tetrahydrofuran THF and the like, are used as solvents of coating slurry, during coating, part of slurry in concave lines or grooves of a micro concave roller is taken out of the concave lines or grooves and transferred onto the base film under the combined influence of pressure, viscous force and surface tension, so that the slurry can seep out of the base film and flow onto a guide roller and a vacuum pull tab roller, the coating slurry can inevitably remain on the guide roller and the vacuum pull tab roller, and the slurry accumulation to a certain degree can influence the coating stability and the coating uniformity.

Disclosure of Invention

The present invention is directed to a micro-gravure coating apparatus for porous base membrane of the porous type to solve the above problems of the background art.

In order to achieve the purpose, the utility model provides the following technical scheme: a micro-concave coating device for a permeable porous base membrane comprises an unwinding mechanism, a roller passing mechanism, a coating mechanism, a drying box, a winding mechanism and a base membrane body, wherein the base membrane body is arranged among the unwinding mechanism, the roller passing mechanism, the coating mechanism, the drying box and the winding mechanism;

coating mechanism contains little concave roller coating unit and reticulation and turns to roller set spare, little concave roller coating unit contains silo and little concave roller body, reticulation turns to roller set spare and contains reticulation roller, scraper and take-up (stock) pan, the scraper has the certain distance with the surface of reticulation roller, the take-up (stock) pan sets up in the below of reticulation roller and scraper.

Preferably, the roller passing mechanism is arranged on one side of the unwinding mechanism, the coating mechanism is arranged above the roller passing mechanism, and the drying oven is arranged between the coating mechanism and the winding mechanism.

Preferably, the anilox roller further comprises an anilox steering roller and a smooth roller with different thread numbers, and the roller passing mechanism comprises a first guide roller, a second guide roller and a third guide roller.

Preferably, the winding mechanism contains vacuum pulling-on piece roller, fourth deflector roll and wind-up roll, one side that the vacuum pulling-on piece roller is close to the drying cabinet, the fourth deflector roll sets up between vacuum pulling-on piece roller and wind-up roll.

Preferably, the base film body is inserted with the inner chamber of drying cabinet in a sliding manner, and the base film body is attached to the micro-concave roller body at a certain angle.

Preferably, the micro concave roller body is arranged on one side of the bottom of the anilox roller, and the trough is arranged on one side of the micro concave roller body.

The utility model has the technical effects and advantages that:

(1) according to the utility model, through the arrangement mode that the micro concave roller coating assembly and the reticulation turning roller assembly are matched, deformation and improvement of a conventional micro concave coating mode are realized, slurry filled into the thread gap or the pit of the reticulation roller through the back surface of the base film body is filled into the thread gap or the pit of the reticulation roller to form a liquid film, so that the back surface of the base film body is conveniently coated, and simultaneously ninety-degree turning of the base film body is facilitated, when the slurry filled into the thread gap or the pit of the reticulation roller exceeds the capacity of the reticulation roller, redundant slurry is scraped by a scraper, so that the double-surface coating of the base film body is more uniform;

(2) according to the utility model, the base film body is in an air cushion flying state through the arrangement mode of the drying box, the base film body cannot be adhered to the roller and cannot permeate into the back surface of the base film body, the contact between the base film body and the roller is reduced, the coating defect is avoided, the coating uniformity is ensured, and after passing through the drying box, the liquid coating is changed into the solid coating which has no fluidity and permeability, so that the coating of the porous base film body is more stable.

Drawings

FIG. 1 is a schematic view of the assembly of the coating machine of the present invention.

FIG. 2 is a schematic view of a conventional dimple coating method according to the present invention.

FIG. 3 is a schematic view of a web turning roll type dimple coating in accordance with the present invention.

FIG. 4 is a schematic view of a coating head of the present invention when coating is not performed.

FIG. 5 is a schematic view of the gravure coating process using the smooth roll of the present invention as a turning roll.

In the figure: 1. an unwinding mechanism; 2. a roller passing mechanism; 21. a first guide roller; 22. a second guide roller; 23. a third guide roller; 3. a coating mechanism; 31. a micro-gravure coating assembly; 3101. a trough; 3102. a dimple roller body; 32. a screen turning roll assembly; 3201. an anilox roll; 32011. a anilox turning roll; 32012. a smooth roll; 3202. a scraper; 3203. a take-up pan; 4. a drying oven; 5. a winding mechanism; 51. a vacuum pull tab roller; 52. a fourth guide roller; 53. a wind-up roll; 6. a base film body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a micro-concave coating device of a permeable porous base film as shown in figures 1-5, which comprises an unwinding mechanism 1, a roller passing mechanism 2, a coating mechanism 3, a drying box 4, a winding mechanism 5 and a base film body 6, wherein the base film body 6 is a porous base film, the front surface of the base film body 6 is an A surface, the back surface of the base film body 6 is a B surface, the base film body 6 is arranged among the unwinding mechanism 1, the roller passing mechanism 2, the coating mechanism 3, the drying box 4 and the winding mechanism 5, the roller passing mechanism 2 is arranged at one side of the unwinding mechanism 1, the coating mechanism 3 is arranged above the roller passing mechanism 2, the drying box 4 is arranged between the coating mechanism 3 and the winding mechanism 5, the drying box 4 has an air flotation function, the drying box 4 can be a section or a plurality of sections, and the inner cavity of the base film body 6 and the drying box 4 are inserted in a sliding manner;

the unwinding mechanism 1 comprises a motor and an automatic unwinding roller, so that the position of the uncoated base film body 6 is conveniently limited and unwound, and the roller passing mechanism 2 comprises a first guide roller 21, a second guide roller 22 and a third guide roller 23, so that the base film body 6 conveniently passes through the first guide roller 21, the second guide roller 22 and the third guide roller 23 respectively, and the base film body 6 is kept at a certain tension before coating;

the coating mechanism 3 comprises a micro-concave roller coating assembly 31 and a screen turning roller assembly 32, the micro-concave roller coating assembly 31 comprises a material groove 3101 and a micro-concave roller body 3102, the material groove 3101 is arranged on one side of the micro-concave roller body 3102 and is convenient for providing coating slurry on the surface of the micro-concave roller body 3102, the base film body 6 is attached to the micro-concave roller body 3102 at a certain angle, the base film body 6 generates a pressure on the micro-concave roller body 3102 under the tension effect, concave lines of the micro-concave roller body 3102 or slurry in the material groove 3101 are adhered to the A surface of the base film body 6 and penetrate through the B surface of the base film body 6 under the combined influence of the pressure, the viscous force and the surface tension, the screen turning roller assembly 32 comprises a screen roller 3201, a scraper 3202 and a material receiving tray 3203, the micro-concave roller body 3102 is arranged on the bottom side of the screen roller 3201, the scraper 3202 has a certain distance with the surface of the screen roller 3201 and is convenient for scraping off the redundant slurry on the surface of the screen roller 3201, the thickness of the sizing agent on the anilox roller 3201 is reduced, so that a uniform liquid film is formed on the anilox roller 3201, and the material receiving tray 3203 is arranged below the anilox roller 3201 and the scraper 3202, so that the excess sizing agent is conveniently supported;

the anilox roller 3201 further comprises an anilox turning roller 32011 and a smooth roller 32012 with different thread numbers, the anilox roller 3201 and the micro-concave roller body 3102 can keep rotating under the starting of a motor to prevent slurry from accumulating, and the base film body 6 is not limited to a porous film with permeability, but can be a porous metal foil belt, a mesh belt, and a non-porous continuous organic film or metal belt foil;

winding mechanism 5 contains vacuum pulling-on piece roller 51, fourth deflector roll 52 and wind-up roll 53, vacuum pulling-on piece roller 51 can rotate for the drive at the motor down, one side that vacuum pulling-on piece roller 51 is close to drying cabinet 4, vacuum pulling-on piece roller 51 provides operation power to basal membrane body 6, be convenient for the stable removal of basal membrane body 6, in addition provide the tension of basal membrane body 6 in the 4 inner chambers of drying cabinet, make basal membrane body 6 can be complete through drying cabinet 4, and can not bump with the inner wall of drying cabinet 4 and touch, fourth deflector roll 52 sets up between vacuum pulling-on piece roller 51 and wind-up roll 53, the good basal membrane body 6 of coating passes through vacuum pulling-on piece roller 51 and fourth deflector roll 52 respectively, realize the rolling on wind-up roll 53, be convenient for make the liquid coating on the basal membrane body 6 become solid coating, do not have mobility and permeability, make the coating of porous basal membrane body more stable.

The working principle of the utility model is as follows:

when in use, the base film body 6 is discharged from the active unwinding mechanism 1, respectively passes through the roller mechanisms 2 and is attached to the right side of the micro concave roller body 3102 at a certain angle, so that the coating of the A surface of the base film body 6 is convenient to realize, the ninety-degree steering of the base film body 6 is realized through the attachment of the base film body 6 and the surface of the anilox roller 3201, the secondary coating of the B surface of the back surface of the base film is realized through the actively rotating anilox roller 3201 and the grooves or pits on the anilox roller 3201, the coating uniformity is convenient to improve through the scraper 3202 and the receiving disc 3203, the base film body 6 horizontally enters the air floating type drying box 4 for coating and drying, the base film body 6 is in an air cushion flying state and cannot be adhered to the roller and cannot permeate the back surface of the base film body 6, the coating uniformity is ensured, after passing through the drying box 4, the film is pulled through the actively rotating vacuum film pulling roller 51 and passes through the fourth guide roller 52, finally, the film is wound on a winding roller 53 which rotates actively, so that the double-sided coating of the base film body 6 is more uniform.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims (6)

1. A micro-concave coating device for a permeable porous base film comprises an unwinding mechanism (1), a roller passing mechanism (2), a coating mechanism (3), a drying box (4), a winding mechanism (5) and a base film body (6), and is characterized in that the base film body (6) is arranged among the unwinding mechanism (1), the roller passing mechanism (2), the coating mechanism (3), the drying box (4) and the winding mechanism (5);

the coating mechanism (3) comprises a micro-gravure roll coating assembly (31) and a screen turning roll assembly (32), the micro-gravure roll coating assembly (31) comprises a trough (3101) and a micro-gravure roll body (3102), the screen turning roll assembly (32) comprises a screen roll (3201), a scraper (3202) and a receiving disc (3203), the scraper (3202) has a certain distance with the surface of the screen roll (3201), and the receiving disc (3203) is arranged below the screen roll (3201) and the scraper (3202).

2. The micro-gravure coating device of a permeable porous base membrane according to claim 1, wherein the roll passing mechanism (2) is disposed at one side of the unwinding mechanism (1), the coating mechanism (3) is disposed above the roll passing mechanism (2), and the drying oven (4) is disposed between the coating mechanism (3) and the winding mechanism (5).

3. The apparatus for coating porous base film with micro-pits according to claim 1, wherein the anilox roll (3201) further comprises a different number of anilox turning rolls (32011) and smoothing rolls (32012), and the roll passing mechanism (2) comprises a first guide roll (21), a second guide roll (22) and a third guide roll (23).

4. The micro-concave coating device for the permeable porous base membrane according to claim 1, wherein the winding mechanism (5) comprises a vacuum pull-tab roller (51), a fourth guide roller (52) and a winding roller (53), the vacuum pull-tab roller (51) is close to one side of the drying oven (4), and the fourth guide roller (52) is arranged between the vacuum pull-tab roller (51) and the winding roller (53).

5. The micro-concave coating device of the permeable porous base membrane according to claim 1, wherein the base membrane body (6) is slidably inserted into an inner cavity of the drying box (4), and the base membrane body (6) is attached to the micro-concave roller body (3102) at a certain angle.

6. The porous base membrane of a penetrating type of the coating apparatus of claim 1, wherein the micro concave roller body (3102) is disposed on the bottom side of the anilox roller (3201), and the trough (3101) is disposed on the side of the micro concave roller body (3102).

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