阅读说明：本技术 一种水性聚氨酯薄膜制备方法 (Preparation method of waterborne polyurethane film ) 是由 刘雁燕 高如馨 于 2021-01-20 设计创作，主要内容包括：本发明涉及一种水性聚氨酯薄膜制备方法,该水性聚氨酯薄膜制备方法采用如下水性聚氨酯薄膜制备设备,该水性聚氨酯薄膜制备设备包括防尘板、输送机构、涂覆装置和干燥机构；所述的防尘板后端面均安装在墙面上,防尘板上部和下部位置均安装有输送机构,防尘板中部上侧安装有涂覆装置,涂覆装置下方设置有干燥机构,干燥机构安装在防尘板内。本发明通过导料块上端面开设有导料槽,通过导料槽使涂料均匀的流下,从而保证了涂料涂覆的均匀性；通过刮除块对薄膜表面多余的涂料进行刮除,防止涂料的厚度不均匀；通过输送装置在对薄膜进行输送的过程中进行涂覆和风干,从而提高了工作效率。(The invention relates to a preparation method of a waterborne polyurethane film, which adopts the following waterborne polyurethane film preparation equipment, wherein the waterborne polyurethane film preparation equipment comprises a dust guard, a conveying mechanism, a coating device and a drying mechanism; the dust guard rear end face all install on the wall, conveying mechanism is all installed to dust guard upper portion and lower part position, the device of coating is installed to dust guard middle part upside, the device below of coating is provided with dry mechanism, dry mechanism installs in the dust guard. According to the invention, the guide chute is formed in the upper end surface of the guide block, so that the coating can uniformly flow down through the guide chute, and the coating uniformity of the coating is ensured; the excessive paint on the surface of the film is scraped by the scraping block, so that the uneven thickness of the paint is prevented; the film is coated and air-dried in the conveying process through the conveying device, so that the working efficiency is improved.)

1. A preparation method of a waterborne polyurethane film adopts the following waterborne polyurethane film preparation equipment, and the waterborne polyurethane film preparation equipment comprises a dust guard (1), a conveying mechanism (2), a coating device (3) and a drying mechanism (4); the method is characterized in that: the rear end face of the dust guard (1) is arranged on the wall surface, the upper part and the lower part of the dust guard (1) are respectively provided with a conveying mechanism (2), the upper side of the middle part of the dust guard (1) is provided with a coating device (3), a drying mechanism (4) is arranged below the coating device (3), and the drying mechanism (4) is arranged in the dust guard (1);

the dustproof plate (1) comprises an outer plate (11) and an inner plate (12), the outer plate (11) and the inner plate (12) are of S-shaped structures, and the rear end faces of the outer plate (11) and the inner plate (12) are both arranged on the wall surface;

the conveying mechanism (2) comprises a mounting plate (21), a rotating motor (22), a connecting plate (23), a driving gear (24), a first gear (25), a second gear (26), a connecting shaft (27) and a transmission roller (28), wherein the mounting plate (21) is respectively mounted on the upper end surface, the upper side and the lower side of the left end surface of the outer plate (11) and the lower side of the right end surface of the inner plate (12), the rotating motor (22) is mounted on the front end surface of the mounting plate (21) through a motor base, the driving gear (24) is fixedly sleeved on the outer wall of an output shaft of the rotating motor (22), the driving gear (24) is in meshing transmission with the first gear, the first gear is in meshing transmission with the second gear (26), the first gear and the second gear (26) are fixedly sleeved on the front side of the outer wall of the connecting shaft (27), mounting grooves are formed in the positions, corresponding to the, the mounting grooves are internally provided with connecting plates (23), the positions of the connecting plates (23) corresponding to the connecting shafts (27) are provided with rotating grooves, the rear ends of the connecting shafts (27) are connected with the rotating grooves in a rotating fit mode, the positions of the inner side end surfaces of the outer plate (11) and the inner plate (12) corresponding to the connecting shafts (27) are provided with semicircular grooves in an up-down symmetrical mode, rotating rollers are fixedly sleeved on the outer walls of the connecting shafts (27), and the outer walls of the rotating rollers are connected with the semicircular grooves in a rotating fit mode;

the coating device (3) comprises a storage box (31), a material conveying pipe (32), material guide blocks (33), coating blocks (34), a scraping block (35), a material collecting box (36) and a hole plug (37), wherein the storage box (31) is symmetrically arranged on the left end surface of an outer plate (11) and the right end surface of an inner plate (12) in a left-right mode, the storage box (31) is of a trapezoid structure, a feeding hole is formed in the upper end surface of the storage box (31), a plurality of connecting holes (3a) are obliquely formed in the position, close to the lower end, of the inner end surface of the storage box (31), the connecting holes (3a) are linearly distributed, the material conveying holes are obliquely formed in the positions, corresponding to the connecting holes (3a), of the outer plate (11) and the inner plate (12), the material guide blocks (33) are symmetrically arranged on the left side and the right side of the positions, corresponding to the inner end surface of the outer plate (11) and the inner, coating blocks (34) are mounted on the inner side end faces of the material guide blocks (33), the coating blocks (34) are attached to the surface of the film, scraping blocks (35) are arranged on the lower end faces of the material guide blocks (33), the scraping blocks (35) are mounted on the inner plate (12) and the outer plate (11) respectively, material receiving holes are formed in the inner side end faces of the inner plate (12) and the outer plate (11) and in positions corresponding to the scraping blocks (35), material collecting boxes (36) are symmetrically mounted on the left side and the right side of the outer side end faces of the inner plate (12) and the outer plate (11) and in positions corresponding to the lower ends of the material receiving holes, rectangular holes are formed in the positions corresponding to the material receiving holes in the material collecting boxes (36), the rectangular holes are obliquely formed, discharge holes are formed in the lower;

the drying mechanism (4) comprises a mounting rack (41) and a transmission motor (42), the transmission belt (43), the rotating shaft (44) and the rotating blades (45), mounting frames (41) are symmetrically mounted on the outer end faces of the inner plate (12) and the outer plate (11), the mounting frames (41) are arranged inwards in an opening mode, the inner wall of each mounting frame (41) is provided with a transmission motor (42), through holes are symmetrically formed in the outer end faces of the inner plate (12) and the outer plate (11) vertically, rectangular grooves are formed in the inner plate (12) and the outer plate (11) respectively, the rectangular grooves are communicated with the through holes, the rotating shaft (44) is rotatably mounted in the through holes respectively, the outer wall of each rotating shaft (44) is fixedly sleeved with a rotating blade (45), the other end of each rotating shaft (44) is rotatably connected with the corresponding rectangular groove, the output shaft of the transmission motor (42) is connected with the upper rotating shaft (44), and;

the method for preparing the waterborne polyurethane film by using the waterborne polyurethane film preparation equipment comprises the following steps:

s1, equipment checking: before the waterborne polyurethane film preparation equipment is started to prepare the waterborne polyurethane film, the running of the equipment is checked;

s2, film conveying: after the film is manufactured and molded by the existing machine, the film is conveyed by a conveying mechanism (2);

s3, coating with paint: when the conveying mechanism (2) conveys the film to a coating position, coating paint on the surfaces of two ends of the film by a coating device (3) while conveying the film, and collecting the coated redundant paint;

s4, drying by blowing: the film which is coated is blown and dried by wind in the process of conveying the film through a drying mechanism (4);

s5, winding and collecting: and winding and collecting the prepared waterborne polyurethane film through a conveying mechanism (2).

2. The method for preparing the waterborne polyurethane film according to claim 1, wherein the method comprises the following steps: the material guide block (33) is of a trapezoidal structure with the upper end surface gradually inclined inwards from top to bottom, the upper end surface of the material guide block (33) is provided with a material guide groove (33a) from front to back in a linear distribution mode, and the section of the material guide groove (33a) is of a semicircular structure.

3. The method for preparing the waterborne polyurethane film according to claim 1, wherein the method comprises the following steps: strike off piece (35) including striker plate (351) and guide plate (352), the striker plate is the symmetry setting from front to back, striker plate (351) outside terminal surface is connected with inner panel (12) and planking (11) respectively, all install between striker plate (351) guide plate (352), guide plate (352) are the trapezium structure of the outside slope gradually from the top down, the inclination of guide plate (352) is the same with the inclination that connects the material hole.

4. The method for preparing the waterborne polyurethane film according to claim 1, wherein the method comprises the following steps: the connecting holes (3a) and the material conveying holes are obliquely formed from top to bottom gradually towards the inner side, and the material conveying holes are communicated with the guide chute (33 a).

5. The method for preparing the waterborne polyurethane film according to claim 1, wherein the method comprises the following steps: the material receiving holes are formed in a mode that the material receiving holes are inclined outwards gradually from top to bottom, and the material receiving holes are in a circular truncated cone shape, and the width of each material receiving hole is gradually reduced outwards from the inner side.

6. The method for preparing the waterborne polyurethane film according to claim 1, wherein the method comprises the following steps: the coating block (34) is made of soft material with strong water absorption.

7. The method for preparing the waterborne polyurethane film according to claim 1, wherein the method comprises the following steps: rotating leaf (45) include ring (451) and flabellum (452), the fixed cover of ring (451) inner wall is established at axis of rotation (44) outer wall, flabellum (452) are evenly installed along its circumference direction to ring (451) outer wall, ventilation hole (4a) have evenly been seted up with flabellum (452) corresponding position to inner panel (12) and planking (11) medial surface.

Technical Field

The invention relates to the field of waterborne polyurethane films, in particular to a preparation method of a waterborne polyurethane film.

Background

The aqueous polyurethane is a novel polyurethane system which takes water as a dispersion medium instead of an organic solvent, and is also called water-dispersed polyurethane, water-system polyurethane or water-based polyurethane; the waterborne polyurethane takes water as a solvent, and has the advantages of no pollution, safety, reliability, excellent mechanical property, good compatibility, easy modification and the like; after the waterborne polyurethane is dried and cured, the waterborne polyurethane has the appearance and performance of an elastomer, a transparent or semitransparent film with good flexibility can be obtained, and the use performance of the film is improved by coating the waterborne polyurethane on the surface of the existing film.

After the film is produced, a layer of waterborne polyurethane is coated on the surface of the film to improve the service performance of the film, but the following problems still exist in the process of coating the waterborne polyurethane coating on the surface of the film in practical use:

(1) when the surface of the film is coated, the coating adsorbed by the coating unit is not uniform, so that more coating is coated on some parts of the surface of the film after the coating is coated on the surface of the film, and the coating coated on some parts is not enough, so that the coating uniformity of the coating cannot be ensured;

(2) when coating the film surface, sometimes the volume of coating ejection of compact is inhomogeneous, leads to some local thickness of film thicker, and some local thickness is thinner, leads to film thickness inconsistent after the coating is dry to influence the life of later stage film.

In order to solve the problems, the invention provides a preparation method of a waterborne polyurethane film.

Disclosure of Invention

In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose: a waterborne polyurethane film preparation method adopts such a waterborne polyurethane film preparation device, and the waterborne polyurethane film preparation device comprises a dust guard, a conveying mechanism, a coating device and a drying mechanism; the rear end face of the dust guard is arranged on the wall surface, the upper part and the lower part of the dust guard are provided with conveying mechanisms, the upper side of the middle part of the dust guard is provided with a coating device, a drying mechanism is arranged below the coating device, and the drying mechanism is arranged in the dust guard;

the dustproof plate comprises an outer plate and an inner plate, the outer plate and the inner plate are of S-shaped structures, and the rear end faces of the outer plate and the inner plate are both arranged on the wall surface;

the conveying mechanism comprises a mounting plate, a rotating motor, a connecting plate, a driving gear, a first secondary gear, a second gear, a connecting shaft and a transmission roller, wherein the mounting plate is respectively arranged on the upper end surface, the upper side of the left end surface, the lower end surface and the lower side of the right end surface of the inner plate, the rotating motor is arranged on the front end surface of the mounting plate through a motor base, the driving gear is fixedly sleeved on the outer wall of an output shaft through the rotating motor, the driving gear is in meshing transmission with the first gear, the first gear is in meshing transmission with the second gear, the first gear and the second gear are fixedly sleeved on the front side of the outer wall of the connecting shaft, mounting grooves are respectively formed in the positions, corresponding to the mounting plate, of the rear end surfaces of the outer plate and the inner plate, the connecting plate is respectively provided with a rotating groove in the position, the rear end of the connecting, the rotating roller is fixedly sleeved on the outer wall of the connecting shaft, and the outer wall of the rotating roller is connected with the inner part of the semicircular groove in a rotating fit mode;

the coating device comprises a storage box, a material conveying pipe, material guide blocks, coating blocks, scraping blocks, a material collecting box and hole plugs, wherein the storage box is symmetrically arranged at the left end surface of an outer plate and the right end surface of an inner plate in a left-right mode, the storage box is of a trapezoidal structure, a feeding hole is formed in the upper end surface of the storage box, a plurality of connecting holes are formed in the position, close to the lower end, of the inner end surface of the storage box, the connecting holes are linearly distributed, the material conveying holes are formed in the positions, corresponding to the connecting holes, of the outer plate and the inner plate in an inclined mode, the material conveying pipe is connected with the connecting holes and the material conveying holes, the material guide blocks are symmetrically arranged at the left side surface and the right side surface, corresponding to the material conveying pipe, of the inner end surface of the outer plate and the inner end surface of the inner plate, the material guide blocks are symmetrically arranged at, the outer end faces of the inner plate and the outer plate are symmetrically provided with material collecting boxes in a left-right mode at positions corresponding to the lower ends of the material receiving holes, rectangular holes are formed in the positions corresponding to the material collecting boxes and the material receiving holes, the rectangular holes are obliquely formed, the lower end face of each material collecting box is provided with a discharge hole, and a hole plug is detachably mounted in each discharge hole;

the drying mechanism comprises a mounting frame, a transmission motor, a transmission belt, a rotating shaft and rotating blades, the mounting frame is symmetrically mounted on the outer end faces of the inner plate and the outer plate, the mounting frame is provided with an inward opening, the transmission motor is mounted on the inner wall of the mounting frame, through holes are symmetrically formed in the outer end faces of the inner plate and the outer plate, rectangular grooves are formed in the inner plate and the outer plate, the rectangular grooves are communicated with the through holes, the rotating shaft is rotatably mounted in the through holes, the rotating blade is fixedly sleeved on the outer wall of the rotating shaft, the other end of the rotating shaft is rotatably connected with the rectangular grooves, an output shaft of the transmission motor is connected with the upper rotating;

the method for preparing the waterborne polyurethane film by using the waterborne polyurethane film preparation equipment comprises the following steps:

s1, equipment checking: before the waterborne polyurethane film preparation equipment is started to prepare the waterborne polyurethane film, the running of the equipment is checked;

s2, film conveying: after the film is manufactured and molded by the existing machine, the film is conveyed by a conveying mechanism;

s3, coating with paint: when the conveying mechanism conveys the film to a coating position, coating the coating on the surfaces of two ends of the film while conveying the film through the coating device, and collecting the coated redundant coating;

s4, drying by blowing: the film which is coated is blown and dried by wind in the process of conveying the film through a drying mechanism;

s5, winding and collecting: and winding and collecting the prepared waterborne polyurethane film through a conveying mechanism.

Preferably, the guide block is a trapezoidal structure with an upper end surface inclined towards the inner side gradually from top to bottom, the upper end surface of the guide block is provided with a guide chute in a linear distribution mode from front to back, and the section of the guide chute is of a semicircular structure.

Preferably, strike off the piece and include striker plate and guide plate, the striker plate sets up for symmetry around, striker plate outside terminal surface is connected with inner panel and planking respectively, all installs the guide plate between the striker plate, the guide plate is the trapezium structure of the slope to the outside from the top down gradually, the inclination of guide plate is the same with the inclination that connects the material hole.

Preferably, the connecting hole and the material conveying hole are both obliquely formed from top to bottom inwards gradually, and the material conveying hole is communicated with the guide chute.

Preferably, the material receiving hole is formed in a manner of inclining outwards gradually from top to bottom, and the material receiving hole is in a circular truncated cone shape with gradually reduced width outwards from the inner side.

Preferably, the coating block is made of soft material with strong water absorption.

Preferably, the rotating blade comprises a circular ring and fan blades, the inner wall of the circular ring is fixedly sleeved on the outer wall of the rotating shaft, the fan blades are uniformly arranged on the outer wall of the circular ring along the circumferential direction of the outer wall of the circular ring, and the inner side end faces of the inner plate and the outer plate are uniformly provided with ventilation holes corresponding to the fan blades.

The invention has the beneficial effects that:

1. according to the invention, the guide chutes are formed on the upper end surfaces of the guide blocks of the coating device in a linear distribution mode from front to back, and the coating material flows down uniformly through the guide chutes, so that the coating blocks can absorb the coating material uniformly, and the coating uniformity of the coating material is ensured; scraping redundant paint on the surface of the film through a scraping block of the coating device to prevent the paint from being uneven in thickness; the film is coated and air-dried in the conveying process through the conveying device, so that the working efficiency is improved.

2. The guide block is of a trapezoidal structure, the upper end face of the guide block is gradually inclined inwards from top to bottom, a guide chute is formed in the upper end face of the guide block from front to back in a linear distribution mode, and the section of the guide chute is of a semicircular structure; the coating material flows down uniformly through the guide chute, so that the coating block can absorb the coating material uniformly, and the coating uniformity of the coating material is ensured.

3. The middle part of the scraping block designed by the invention is of a trapezoidal structure which is gradually inclined outwards from top to bottom, when the coating on the surface of the thin film is too much coated and the thin film moves to the scraping block, the scraping block scrapes the redundant coating on the surface of the thin film, and the scraped coating flows into the aggregate box through the material receiving hole, so that the coating is prevented from being uneven in thickness.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a flow chart of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a front cross-sectional view of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3 in accordance with the present invention;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3 in accordance with the present invention;

FIG. 6 is an enlarged view of a portion of the invention at C in FIG. 3;

FIG. 7 is a cross-sectional view taken along line D-D of FIG. 2 in accordance with the present invention;

FIG. 8 is a perspective view of the delivery mechanism of the present invention;

fig. 9 is a perspective view of a guide block and a coating block according to the present invention;

fig. 10 is a perspective view of a scraper block of the present invention;

FIG. 11 is a schematic perspective view of the magazine of the present invention.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1 to 11, a method for preparing a water-based polyurethane film, which adopts water-based polyurethane film preparation equipment comprising a dust guard 1, a conveying mechanism 2, a coating device 3 and a drying mechanism 4; the rear end face of the dust guard 1 is arranged on the wall surface, the upper part and the lower part of the dust guard 1 are respectively provided with a conveying mechanism 2, the upper side of the middle part of the dust guard 1 is provided with a coating device 3, a drying mechanism 4 is arranged below the coating device 3, and the drying mechanism 4 is arranged in the dust guard 1;

the dust guard 1 comprises an outer plate 11 and an inner plate 12, wherein the outer plate 11 and the inner plate 12 are both of S-shaped structures, and the rear end faces of the outer plate 11 and the inner plate 12 are both arranged on the wall surface;

the conveying mechanism 2 comprises a mounting plate 21, a rotating motor 22, a connecting plate 23, a driving gear 24, a first gear 25, a second gear 26, a connecting shaft 27 and a transmission roller 28, the mounting plate 21 is respectively mounted on the upper end surface, the upper side and the lower end surface of the outer plate 11 and the lower side of the right end surface of the inner plate 12, the rotating motor 22 is mounted on the front end surface of the mounting plate 21 through a motor base, the driving gear 24 is fixedly sleeved on the outer wall of an output shaft of the rotating motor 22, the driving gear 24 is in meshing transmission with the first gear, the first gear is in meshing transmission with the second gear 26, the first gear and the second gear 26 are fixedly sleeved on the front side of the outer wall of the connecting shaft 27, mounting grooves are respectively formed in the positions, corresponding to the mounting plate 21, of the rear end surfaces of the outer plate 11 and the inner plate 12, the connecting plate 23 is mounted in the mounting grooves, semicircular grooves are symmetrically formed in the positions, corresponding to the connecting shaft 27, of the inner side end surfaces of the outer plate 11 and the inner plate 12, rotating rollers are fixedly sleeved on the outer wall of the connecting shaft 27, and the outer wall of each rotating roller is connected with the inner part of each semicircular groove in a rotating fit mode; during specific work, make the shaping back with the film through current machine, start through rotating motor 22, the output shaft forward rotation that rotates motor 22 drives driving gear 24 forward rotation, move first gear forward rotation through driving gear 24 and first gear engagement drive belt 43, first gear moves second gear 26 antiport with second gear 26 engagement drive belt 43, rotate through first gear and second gear 26 and drive the rotation of driving roller 28 to opposite direction respectively through connecting axle 27, and realize the transport to the film.

Coating device 3 include storage tank 31, conveying pipeline 32, guide block 33, coating block 34, strike off piece 35, case 36 and hole stopper 37 that gathers materials, storage tank 31 is installed to the left end face of planking 11 and the right-hand member face bilateral symmetry of inner panel 12, storage tank 31 is trapezium structure, the feed port has been seted up to storage tank 31 up end, storage tank 31 medial surface is close to the lower extreme position slope and has seted up a plurality of connecting holes 3a, connecting hole 3a is linear distribution, connecting hole 3a and conveying hole be from last to the slope of inboard gradually down and set up, conveying hole is linked together with baffle box 33 a. The outer plate 11 and the inner plate 12 are all inclined relative to the connecting hole 3a, the conveying pipe 32 is connected with the connecting hole 3a and the conveying hole, the guide blocks 33 are symmetrically arranged on the inner side end surface of the outer plate 11 and the inner side end surface of the inner plate 12 in a left-right manner relative to the corresponding position of the conveying pipe 32, the guide blocks 33 are of a trapezoidal structure with the upper end surfaces inclined gradually from top to bottom towards the inside, the guide groove 33a is formed in the upper end surface of the guide blocks 33 in a front-to-back linear distribution mode, and the section of the guide groove 33a is of a semicircular structure. The coating material flows down uniformly through the material guide chute 33a, so that the coating block 34 can absorb the coating material uniformly, thereby ensuring the coating uniformity of the coating material. The coating blocks 34 are mounted on the end faces of the inner sides of the material guide blocks 33, and the coating blocks 34 are made of soft materials with strong water absorption. Coating piece 34 all laminates with the film surface mutually, and guide block 33 lower terminal surface is provided with strikes off piece 35, strike off piece 35 including striker plate 351 and guide plate 352, the striker plate sets up for front and back symmetry, striker plate 351 outside terminal surface is connected with inner panel 12 and planking 11 respectively, all install guide plate 352 between the striker plate 351, guide plate 352 is the trapezium structure of the outside slope gradually from the top down, guide plate 352's inclination is the same with the inclination that connects the material hole. The coating is prevented from dripping off the deflector 352 by the striker plate 351. Scraping block 35 is installed respectively on inner panel 12 and planking 11, and the inboard terminal surface of inner panel 12 and planking 11 all has seted up with scraping the corresponding position of block 35 and has connect the material hole, connect the material hole for from the top down to the outside slope gradually set up, connect the material hole for from the inboard circular platform shape that the width reduces gradually in the outside gradually. The outer side end faces of the inner plate 12 and the outer plate 11 are symmetrically provided with material collecting boxes 36 at positions corresponding to the lower ends of the material receiving holes, the positions of the material collecting boxes 36 corresponding to the material receiving holes are provided with rectangular holes, the rectangular holes are obliquely formed, the lower end face of the material collecting box 36 is provided with a discharge hole, and a hole plug 37 is detachably mounted in the discharge hole; during specific operation, when the conveying mechanism 2 conveys the film to the coating position, the coating in the conveying box flows out from the conveying hole, the coating is conveyed into the guide groove 33a of the guide block 33 through the conveying pipe 32, the coating flows to the coating block 34 through the guide groove 33a, the coating is fully absorbed through the coating block 34 and is attached to the surface of the film through the coating block 34, when the conveying mechanism 2 drives the film to move from the coating block 34, the coating on the coating block 34 is coated on the surface of the film, when the coating on the surface of the film is excessively coated, the film moves to the scraping block 35, the scraping block 35 scrapes off the redundant coating on the surface of the film, and the scraped coating flows into the collecting box 36 through the receiving hole, so that the coating is prevented from being uneven in thickness.

Drying mechanism 4 include mounting bracket 41, driving motor 42, drive belt 43, axis of rotation 44 and rotation leaf 45, mounting bracket 41 is installed to the equal symmetry of inner panel 12 and 11 outside terminal surfaces of planking, mounting bracket 41 is the inside setting of opening, driving motor 42 is all installed to the inner wall of mounting bracket 41, the through-hole has been seted up to the equal longitudinal symmetry of inner panel 12 and 11 outside terminal surfaces of planking, the rectangular channel has all been seted up to inner panel 12 and 11 inside of planking, the rectangular channel is linked together with the through-hole, all rotate in the through-hole and install axis of rotation 44, the equal cover of axis of rotation 44 outer wall is equipped with rotation leaf 45, rotation leaf 45 include ring 451 and flabellum 452, the fixed cover of ring 451 inner wall is established at axis of rotation 44 outer wall, ring 451 outer wall evenly installs flabellum 452 along its circumference direction, ventilation hole 4a has. The other end of the rotating shaft 44 is rotatably connected with the rectangular groove, an output shaft of the transmission motor 42 is connected with the upper rotating shaft 44, and the upper rotating shaft 44 and the lower rotating shaft 44 are connected through a conveyor belt; during specific work, when conveying mechanism 2 drives the film and removes to 4 positions of drying mechanism, driving motor 42 starts, driving mechanism's output shaft rotates the axis of rotation 44 of upside and rotates, the axis of rotation 44 of upside passes through drive belt 43 and drives the axis of rotation 44 of downside and rotate, rotate through axis of rotation 44 and drive rotatory bucket 45 and be circular motion, thereby dry through wind-force to the coating on film surface, carry out the in-process that carries the film through conveyor and coat and air-dry, thereby improved work efficiency.

The method for preparing the waterborne polyurethane film by using the waterborne polyurethane film preparation equipment comprises the following steps:

s1, equipment checking: before the waterborne polyurethane film preparation equipment is started to prepare the waterborne polyurethane film, the running of the equipment is checked;

s2, film conveying: after the film is manufactured and molded by the existing machine, the output shaft of the rotating motor 22 rotates forward to drive the driving gear 24 to rotate forward, the driving gear 24 and the first gear meshed with the transmission belt 43 to drive the first gear to rotate forward, the first gear and the second gear 26 meshed with the transmission belt 43 to drive the second gear 26 to rotate reversely, the first gear and the second gear 26 rotate to respectively drive the transmission rollers 28 to rotate in opposite directions through the connecting shaft 27, and the film is conveyed;

s3, coating with paint: when the conveying mechanism 2 conveys the film to the coating position, the coating in the conveying box flows out from the conveying hole, the coating is conveyed into the guide chute 33a of the guide block 33 through the conveying pipe 32, the coating is fully absorbed by the coating block 34 at the position of the coating block 34 through the guide chute 33a, the coating is attached to the surface of the film through the coating block 34, when the conveying mechanism 2 drives the film to move from the position of the coating block 34, the coating on the coating block 34 is coated on the surface of the film, when the coating on the surface of the film is excessively coated, the film moves to the scraping block 35, the scraping block 35 scrapes the coating on the surface of the film, and the scraped coating flows into the collecting box 36 through the receiving hole, so that the coating is prevented from being uneven in thickness;

s4, drying by blowing: when the conveying mechanism 2 drives the film to move to the position of the drying mechanism 4, the transmission motor 42 is started, the output shaft of the transmission mechanism rotates the upper rotating shaft 44 to rotate, the upper rotating shaft 44 drives the lower rotating shaft 44 to rotate through the transmission belt 43, and the rotating shaft 44 drives the rotating blades 45 to do circular motion, so that the coating on the surface of the film is dried by wind power;

s5, winding and collecting: and winding and collecting the prepared waterborne polyurethane film through a conveying mechanism 2.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as hereinafter claimed. The scope of the invention is defined by the appended claims and equivalents thereof.