CN110653119B

CN110653119B - Leather coating machine

Info

Publication number: CN110653119B
Application number: CN201910738314.4A
Authority: CN
Inventors: 张陈雄; 张佑涛; 何宁; 韩燕飞; 陈维贤; 陈宝娟; 潘玲其
Original assignee: Wenzhou Feilong Polyurethane Engineering Co ltd
Current assignee: Wenzhou Feilong Polyurethane Engineering Co ltd
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2021-04-20
Anticipated expiration: 2039-08-12
Also published as: CN110653119A

Abstract

The invention discloses a leather coating machine, which comprises a material collecting mechanism, a scraping coating mechanism, a machine shell and a base, wherein the machine shell is arranged on the base, the material collecting mechanism is arranged on one side of the machine shell, the scraping coating mechanism is arranged on one side of the material collecting mechanism, the material collecting mechanism comprises a material lifting roller, a vacuum adsorption seat, a material pressing roller, a winding shaft and a negative pressure air pump, the material lifting roller, the material pressing roller and the winding shaft are movably connected to the top of the base through a bearing seat, the vacuum adsorption seat is correspondingly arranged on the top of the base, one end of the vacuum adsorption seat is connected with an air exhaust pipe, one end of the air exhaust pipe is in through connection with the negative pressure air pump, the cross section of the vacuum adsorption seat is I-shaped, the inner wall of the bottom of the bending side of the vacuum adsorption seat is an inclined plane, a square groove is formed in the vacuum adsorption seat, the invention has the characteristics of preventing wrinkling and uniform coating.

Description

Leather coating machine

Technical Field

The invention relates to the technical field of coating machines, in particular to a leather coating machine.

Background

The coating technology is to apply one or more layers of liquid with specific functions on the surface to improve the performance of the surface substrate or directly utilize the surface characteristics of the coating to improve the use value of the product. Coating techniques are generally used to produce a product with a specific function in the form of a pair roll, and common coating methods are gravure coating, hybrid coating, and the like.

In the existing leather coating, because the leather surface has fine unevenness, the leather surface cannot be completely attached and contacted with a scraper when passing through a gravure roller, and some dents cannot be touched, so that the material coated on the leather surface by the scraper is not uniform; the existing leather coating needs longer distance drying when receiving materials, the leather can drop at the center without support due to gravity to cause wrinkles, slight wrinkles can be caused due to the deviation of the leather direction in some cases, and the surface of the leather can be silted with grains after being rolled to influence the leather quality; meanwhile, in the existing leather coating, a large amount of coating possibly remains at the contact position of the gravure roller and the leather to form a liquid bridge, and the liquid bridge causes coating interference and has poor coating effect. Therefore, it is necessary to design a leather coater that prevents wrinkling and uniform coating.

Disclosure of Invention

The present invention is directed to a leather coating machine to solve the above problems of the background art.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a leather coating machine, includes receiving agencies, knife coating mechanism, casing and base, be provided with the casing on the base one side of casing is provided with receiving agencies, one side of receiving agencies is provided with knife coating mechanism, and the base is used for installing receiving agencies and knife coating mechanism, and knife coating mechanism is used for scribbling the coating with the leather, and receiving agencies is used for rolling the leather that the knife coating finishes into cylindric.

Further, the receiving mechanism comprises a material lifting roller, a vacuum adsorption seat, a pressure roller, a winding shaft and a negative pressure air pump, the top of the base is movably connected with the material lifting roller, the pressure roller and the winding shaft through a bearing seat, the vacuum adsorption seat is correspondingly arranged at the top of the base, one end of the vacuum adsorption seat is connected with an air exhaust pipe, one end of the air exhaust pipe is connected with the negative pressure air pump in a penetrating manner, when receiving materials, the material lifting roller and the pressure roller are matched with each other to receive the materials, the winding shaft is used for winding the finished materials, the vacuum adsorption seats are symmetrically distributed on two sides of the leather and used for pulling two sides of the leather to absorb the leather to be unfolded to a flat state, the negative pressure air pump is used for providing negative pressure for the vacuum adsorption seat, and oblique threads of the material lifting roller can enable the leather to.

Furthermore, the cross section of the vacuum adsorption seat is I-shaped, the inner wall of the bottom of the bent side of the vacuum adsorption seat is an inclined plane, a square groove is formed in the vacuum adsorption seat, the square groove is communicated with an exhaust tube, a first motor is installed on one side of the vacuum adsorption seat, an output shaft of the first motor penetrates through the side wall of the vacuum adsorption seat, belt wheels are sleeved outside the output shaft and are positioned in the square groove, the two belt wheels are distributed at two ends of the square groove, a conveying belt is sleeved between the two belt wheels, through holes are uniformly formed in the conveying belt, the exhaust tube is used for conducting negative pressure and the square groove to enable the square groove to be in a negative pressure state, the output shaft of the first motor drives the belt wheels to rotate, the belt wheels drive the conveying belt to move, the conveying belt drives leather to move, the leather is kept to be always attached to the conveying belt, and the through holes are used, avoiding wrinkles caused by overlong distance or leather direction deviation, avoiding surface silting and ensuring good leather quality.

Further, the top protrusion of conveyer belt is in the top inner wall of the side of buckling in the vacuum adsorption seat, and gap department between the part of exceeding and the notch of square groove is provided with the sealing strip, and the sealing strip is used for preventing that the air from running out from the gap between conveyer belt and the notch, and convex highly is favorable to the leather to paste on the conveyer belt, and the speed of conveyer belt motion should be the same with the speed that lifts material roller and nip roll messenger leather motion, makes the both sides of conveyer belt and leather laminate all the time.

Further, the blade coating mechanism comprises a first guide roller, a gravure roller, a second guide roller, a coating liquid groove, a scraper and a return pipe, wherein the base is respectively and movably connected with the first guide roller, the gravure roller and the second guide roller through a bearing seat, the first guide roller and the second guide roller are correspondingly distributed on two sides of the gravure roller, the coating liquid groove is installed on the base, one part of the gravure roller is positioned inside the coating liquid groove, the return pipe is correspondingly installed on two sides of the coating liquid groove, one end of the return pipe is positioned at the top of the coating liquid groove, a hose is arranged on the return pipe, a lining plate is arranged at the bottom of the hose, a second motor is installed on one side of the lining plate, a triangular pressing column is distributed on the outer circumference of an output shaft of the second motor, the triangular pressing column is in contact with the hose, the second motor drives the triangular pressing column to rotate during operation, the triangular pressing column presses, the liquid in the backflow pipe is drained, the liquid bridge can be conveniently and constantly absorbed, the gravure roller is connected with external torque, the coating liquid in the coating liquid groove is driven to dip when the gravure roller rotates, the amount of the coating liquid is limited by the scraper, the coating liquid can be coated on the surface of leather, and the liquid bridge is inevitably generated due to coating liquid silting at the moment.

Further, the even through connection of one end of back flow has the liquid bridge absorption tube, the shape of liquid bridge absorption tube is the T style of calligraphy, and a plurality of absorption holes have been seted up to one side of liquid bridge absorption tube, and the end direction of liquid bridge absorption tube is the same with the direction of gravure roller, is favorable to absorbing the liquid bridge, avoids the coating to disturb, and the coating is effectual to retrieve unnecessary liquid to the coating groove, avoid extravagant.

Further, the gravure roller is divided into a plurality of lamellae, the outer peripheral surface of the lamellae is convexly provided with a leather contact part, a circular hole is formed in the center of the lamellae, springs are uniformly distributed on the inner wall of the circular hole, one end of each spring is connected with a steel ball, the top of the base is movably connected with a supporting shaft through a bearing seat, the supporting shaft is connected with an external torque power source and penetrates through the circular hole, bearings are uniformly sleeved on the outer portion of the supporting shaft, the steel balls are in contact with the bearings, when the lamellae move up and down, the springs can be extended or shortened to play a role in adjusting the positions of the lamellae, and grooves matched with the steel balls are formed in the bearings, so that the steel balls can roll on the outer surfaces of the bearings to keep.

Furthermore, a sealing ring is fixedly arranged on one side of each layer sheet through bonding, the sealing ring is in contact with the adjacent layer sheet, an elastic traction wire is uniformly connected to the outer portion of the supporting shaft, one end of the elastic traction wire is connected with one side of each layer sheet, the elastic traction wire can be extended and shortened, when the supporting shaft rotates under the action of torque, the layer sheets are driven to rotate by the elastic traction wire, the elastic traction wire is tightened, due to the fact that the surface of the leather is uneven, different pressures are given to each layer sheet, the upper position and the lower position of each layer sheet are different, the elastic traction wire is extended or shortened according to the up-down floating position, the position of each layer sheet can be automatically adjusted according to the pressures, unevenness on the surface of the leather is well compensated, the amplitude of depression is reduced.

Compared with the prior art, the invention has the following beneficial effects: in the invention, the raw materials are mixed,

(1) the original gravure roller can be divided into a plurality of laminas by arranging the laminas, the elastic traction wires and other members, each lamina rotates under the action of traction, when the surface of the rugged leather faces, the position of each lamina can be automatically adjusted according to pressure, the unevenness of the surface of the leather is well compensated, the amplitude of the depression is reduced, and the coating effect is uniform.

(2) The liquid bridge on the contact surface of the gravure roller and the leather can be damaged and absorbed by the triangular pressing column, the liquid bridge absorption pipe and other members, coating interference is avoided, the coating effect is good, redundant liquid is recycled to the coating groove, and waste is avoided.

(3) Through being provided with components such as vacuum adsorption seat and negative pressure air pump, can firmly hold the both sides of leather in the fortune material of longer distance, avoid because apart from the fold that overlength or leather direction skew caused, lift the oblique screw thread of material roller and also can make the leather expand to both sides, further eliminate the fold, avoid the surface siltation, the leather is of high quality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

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

FIG. 2 is a schematic structural view of a receiving mechanism of the present invention;

FIG. 3 is a schematic view of the vacuum chuck of the present invention;

FIG. 4 is a schematic view from a perspective H-H of the present invention;

FIG. 5 is a schematic view of the installation of a gravure roll and a reflux tube according to the present invention;

FIG. 6 is a schematic front cross-sectional view of a gravure roll and a gravure roll of the present invention;

FIG. 7 is a schematic side cross-sectional structural view of a gravure roll of the present invention;

FIG. 8 is a schematic view from a J-J perspective of the present invention;

in the figure: 1. a material receiving mechanism; 2. a blade coating mechanism; 3. a housing; 4. a base; 5. leather; 51. folding; 52. a liquid bridge; 11. a material lifting roller; 12. a vacuum adsorption base; 13. a nip roll; 14. a winding shaft; 15. a negative pressure air pump; 111. unfolding the lines; 121. a square groove; 122. a first motor; 123. a conveyor belt; 1231. a through hole; 124. a sealing strip; 125. a pulley; 151. an air exhaust pipe; 21. a first guide roller; 22. a gravure roller; 23. a second guide roller; 24. a coating liquid tank; 25. a scraper; 26. a return pipe; 261. a liquid bridge absorber tube; 262. a hose; 263. a triangular compression leg; 264. a second motor; 265. a liner plate; 221. a ply; 222. a leather contact portion; 223. a circular hole; 224. a support shaft; 225. steel balls; 226. a spring; 227. a bearing; 228. a seal ring; 229. and (4) elastic drawing wires.

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.

Referring to fig. 1-8, the present invention provides the following technical solutions: a leather coating machine comprises a material receiving mechanism 1, a scraping coating mechanism 2, a machine shell 3 and a base 4, wherein the machine shell 3 is arranged on the base 4, the material receiving mechanism 1 is arranged on one side of the machine shell 3, the scraping coating mechanism 2 is arranged on one side of the material receiving mechanism 1, the base 4 is used for installing the material receiving mechanism 1 and the scraping coating mechanism 2, the scraping coating mechanism 2 is used for coating a leather 5 with a coating, and the material receiving mechanism 1 is used for rolling the scraped leather 5 into a cylindrical shape;

the receiving mechanism 1 comprises a material lifting roller 11, a vacuum adsorption seat 12, a material pressing roller 13, a winding shaft 14 and a negative pressure air pump 15, the top of a base 4 is movably connected with the material lifting roller 11, the material pressing roller 13 and the winding shaft 14 through a bearing seat, the top of the base 4 is correspondingly provided with the vacuum adsorption seat 12, one end of the vacuum adsorption seat 12 is connected with an air exhaust pipe 151, one end of the air exhaust pipe 151 is connected with the negative pressure air pump 15 in a penetrating manner, when receiving is carried out, the material lifting roller 11 and the material pressing roller 13 are matched with each other to receive materials, the winding shaft 14 is used for winding the finished materials, the vacuum adsorption seats 12 are symmetrically distributed on two sides of the leather 5 and used for pulling two sides of the leather 5 to be adsorbed and unfolded to be in a flat state, the negative pressure air pump 15 is used for providing negative pressure for the vacuum adsorption seat 12, oblique threads of the;

the cross section of the vacuum adsorption seat 12 is in an I shape, the inner wall of the bottom of the bending side of the vacuum adsorption seat is an inclined plane, a square groove 121 is formed in the vacuum adsorption seat 12, the square groove 121 is communicated with an exhaust tube 151, a first motor 122 is installed on one side of the vacuum adsorption seat 12, an output shaft of the first motor 122 penetrates through the side wall of the vacuum adsorption seat 12, belt pulleys 125 are sleeved outside the output shaft, the belt pulleys 125 are positioned in the square groove 121, the number of the belt pulleys 125 is two and distributed at two ends of the square groove 121, a conveyor belt 123 is sleeved between the two belt pulleys 125, through holes 1231 are uniformly formed in the conveyor belt 123, the exhaust tube 151 is used for conducting negative pressure and the square groove 121 to enable the square groove 121 to be in a negative pressure state, the output shaft of the first motor 122 drives the belt pulleys 125 to rotate, the belt pulleys 125 drive the conveyor belt 123 to move, the, the through hole 1231 is used for communicating the square groove 121 and the top of the conveying belt 123, so that wrinkles 51 caused by overlong distance or deviation of the leather direction are avoided, surface siltation is avoided, and the leather quality is good;

the top of the conveying belt 123 protrudes out of the inner wall of the top of the bent side in the vacuum adsorption seat 12, a sealing strip 124 is arranged at a gap between the raised part and the notch of the square groove 121, the sealing strip 124 is used for preventing air from escaping out of the gap between the conveying belt 123 and the notch, the protruding height is beneficial for the leather 5 to be attached to the conveying belt 123, the moving speed of the conveying belt 123 is the same as the moving speed of the leather 5 caused by the material lifting roller 11 and the material pressing roller 13, and the conveying belt 123 is always attached to two sides of the leather 5;

the blade coating mechanism 2 comprises a first guide roller 21, a gravure roller 22, a second guide roller 23, a coating liquid groove 24, a scraper 25 and a return pipe 26, the base 4 is movably connected with the first guide roller 21, the gravure roller 22 and the second guide roller 23 through bearing seats respectively, the first guide roller 21 and the second guide roller 23 are correspondingly distributed on two sides of the gravure roller 22, the coating liquid groove 24 is installed on the base 4, a part of the gravure roller 22 is positioned in the coating liquid groove 24, the return pipe 26 is correspondingly installed on two sides of the coating liquid groove 24, one end of the return pipe 26 is positioned at the top of the coating liquid groove 24, a hose 262 is arranged on the return pipe 26, a lining plate 265 is arranged at the bottom of the hose 262, a second motor 264 is installed on one side of the lining plate 265, a triangular pressing column 263 is distributed on the outer circumference of an output shaft of the second motor 264, the triangular pressing column 263 is contacted with the hose 262, the second motor 264 drives the triangular pressing column 263 to rotate, so that the liquid in the return pipe 26 is drained to facilitate the liquid bridge 52 to be absorbed continuously, the gravure roller 22 is connected with external torque, the gravure roller rotates to drive the coating liquid in the coating liquid groove 24 to be dipped, the amount of the coating liquid is limited by the scraper 25, and then the coating liquid is coated on the surface of the leather 5, and the liquid bridge 52 is inevitably generated due to the coating liquid silting;

one end of the return pipe 26 is uniformly connected with a liquid bridge absorption pipe 261 in a penetrating manner, the liquid bridge absorption pipe 261 is T-shaped, a plurality of absorption holes are formed in one side of the liquid bridge absorption pipe 261, the direction of the end of the liquid bridge absorption pipe 261 is the same as that of the gravure roller 22, the liquid bridge 52 can be absorbed conveniently, coating interference is avoided, the coating effect is good, redundant liquid is recycled to the coating groove 24, and waste is avoided;

the gravure roller 22 is divided into a plurality of layer pieces 221, the outer peripheral surface of each layer piece 221 is convexly provided with a leather contact part 222, a circular hole 223 is formed in the center of each layer piece 221, springs 226 are uniformly distributed on the inner wall of each circular hole 223, one end of each spring 226 is connected with a steel ball 225, the top of the base 4 is movably connected with a support shaft 224 through a bearing seat, the support shaft 224 is connected with an external torque power source, the support shaft 224 penetrates through the circular holes 223, bearings 227 are uniformly sleeved on the outer portions of the support shafts 224, the steel balls 225 are in contact with the bearings 227, when the layer pieces 221 move up and down, the springs 226 can extend or shorten to play a role in adjusting the position of the layer pieces 221, grooves matched with the steel balls 225 are formed in the bearings 227, and the;

a sealing ring 228 is fixedly bonded on one side of each layer piece 221, the sealing ring 228 is in contact with the adjacent layer piece 221, an elastic drawing wire 229 is uniformly connected to the outer portion of the supporting shaft 224, one end of the elastic drawing wire 229 is connected with one side of each layer piece 221, the elastic drawing wire 229 can stretch and shorten, when the supporting shaft 224 is rotated by torque, the layer pieces 221 are driven to rotate by the elastic drawing wires 229, the elastic drawing wires 229 are tightened, different pressures are applied to each layer piece 221 due to the uneven surface of the leather 5, the upper position and the lower position of each layer piece 221 are different, the elastic drawing wires 229 stretch or shorten according to the positions floating up and down, the position of each layer piece can be automatically adjusted according to the pressures, the uneven position of the surface of the leather can be well compensated, the concave amplitude is reduced, and the coating effect.

The working principle is as follows: when the coating machine works, the base 4 is used for installing the material receiving mechanism 1 and the scraping coating mechanism 2, the scraping coating mechanism 2 is used for coating the leather 5 with coating, and the material receiving mechanism 1 is used for winding the leather 5 which is subjected to scraping coating into a cylindrical shape; when receiving materials, the material lifting roller 11 and the material pressing roller 13 are matched with each other to receive the materials, the winding shaft 14 is used for winding the finished materials, the vacuum adsorption seats 12 are symmetrically distributed on two sides of the leather 5 and used for pulling the two sides of the leather 5 to suck and expand the leather to a flat state, the negative pressure air pump 15 is used for providing negative pressure for the vacuum adsorption seats 12, and oblique threads of the material lifting roller 11 can also enable the leather to expand towards two sides so as to further eliminate wrinkles; the air exhaust pipe 151 is used for communicating negative pressure with the square groove 121 to enable the inside of the square groove 121 to be in a negative pressure state, the output shaft of the first motor 122 drives the belt pulley 125 to rotate, the belt pulley 125 drives the conveying belt 123 to move, the conveying belt 123 drives the leather 5 to move, the leather 5 is kept to be always attached to the conveying belt 123, the through hole 1231 is used for communicating the square groove 121 and the top of the conveying belt 123, wrinkles caused by overlong distance or deviation of the leather direction are avoided, surface siltation is avoided, and the leather quality is good; the sealing strips 124 are used for preventing air from escaping from the gap between the conveyor belt 123 and the notch, the protruding height is beneficial for the leather 5 to be attached to the conveyor belt 123, the moving speed of the conveyor belt 123 is the same as the moving speed of the leather 5 caused by the material lifting roller 11 and the material pressing roller 13, and the conveyor belt 123 is always attached to the two sides of the leather 5; when the device works, the second motor 264 drives the triangular pressing column 263 to rotate, the triangular pressing column 263 presses the hose 262 and conveys liquid in the hose 262 from left to right, so that the liquid in the return pipe 26 is discharged, the liquid bridge 52 is conveniently and continuously absorbed, the gravure roller 22 is connected with external torque, the coating liquid in the coating liquid groove 24 is driven to dip when the gravure roller rotates, the amount of the coating liquid is limited by the scraper 25 and then the coating liquid is coated on the surface of the leather 5, and the liquid bridge 52 is inevitably generated due to coating liquid deposition; the direction of the end of the liquid bridge absorption pipe 261 is the same as that of the gravure roller 22, so that the liquid bridge 52 can be absorbed, the coating interference is avoided, the coating effect is good, and the redundant liquid is recycled to the coating tank 24, so that the waste is avoided; when the lamellae 221 move up and down, the spring 226 can extend or contract to adjust the position of the lamellae 221, and the bearing 227 is provided with a groove matched with the steel ball 225, so that the steel ball 225 can roll on the outer surface of the bearing 227 to keep the radial position of the lamellae 221; the elastic drawing wire 229 can be extended and shortened, when the supporting shaft 224 is rotated by torque, the supporting shaft utilizes the elastic drawing wire 229 to drive the layer piece 221 to rotate, the elastic drawing wire 229 is tightened, different pressures are applied to each layer piece 221 due to the uneven surface of the leather 5, the upper position and the lower position of each layer piece 221 are different, the elastic drawing wire 229 is extended or shortened according to the position of vertical floating, the position of each layer piece can be automatically adjusted according to the pressures, the uneven position of the surface of the leather is well compensated, the sinking amplitude is reduced, and the coating effect is uniform.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a leather coating machine, includes receiving agencies (1), knife coating mechanism (2), casing (3) and base (4), its characterized in that: be provided with casing (3) on base (4), one side of casing (3) is provided with receiving agencies (1), one side of receiving agencies (1) is provided with knife coating mechanism (2), knife coating mechanism (2) include first deflector roll (21), gravure roll (22), second deflector roll (23), coating cistern (24), scraper (25) and back flow (26), there are first deflector roll (21), gravure roll (22) and second deflector roll (23) on base (4) through bearing frame swing joint respectively, first deflector roll (21) and second deflector roll (23) correspond the both sides of distributing in gravure roll (22), install coating cistern (24) on base (4), inside gravure roll (22) some is located coating cistern (24), back flow (26) are correspondingly installed to the both sides of coating cistern (24), one end of the return pipe (26) is positioned at the top of the coating liquid tank (24), a hose (262) is arranged on the return pipe (26), a lining plate (265) is arranged at the bottom of the hose (262), a second motor (264) is installed on one side of the lining plate (265), triangular press pillars (263) are distributed on the outer circumference of an output shaft of the second motor (264), the triangular press pillars (263) are in contact with the hose (262), one end of the return pipe (26) is uniformly connected with a liquid bridge absorption pipe (261) in a penetrating manner, the liquid bridge absorption pipe (261) is T-shaped, a plurality of absorption holes are formed in one side of the liquid bridge absorption pipe (261), the gravure roller (22) is divided into a plurality of lamellae (221), a leather contact part (222) is arranged on the outer circumferential surface of the lamellae (221) in a protruding manner, and a circular hole (223) is formed in the center of the, the inner wall evenly distributed of circular port (223) has spring (226), the one end of spring (226) is connected with steel ball (225), the top of base (4) has back shaft (224) through bearing frame swing joint, back shaft (224) are connected with external torque power supply, back shaft (224) pass circular port (223), bearing (227) have evenly been cup jointed to the outside of back shaft (224), steel ball (225) contact with bearing (227), the outside evenly connected with elasticity of back shaft (224) draws wire (229).

2. A leather coater according to claim 1, wherein: the receiving mechanism (1) comprises a material lifting roller (11), a vacuum adsorption seat (12), a material pressing roller (13), a winding shaft (14) and a negative pressure air pump (15), the top of the base (4) is movably connected with the material lifting roller (11), the material pressing roller (13) and the winding shaft (14) through a bearing seat, the vacuum adsorption seat (12) is correspondingly arranged at the top of the base (4), one end of the vacuum adsorption seat (12) is connected with an air exhaust pipe (151), and one end of the air exhaust pipe (151) is connected with the negative pressure air pump (15) in a penetrating mode.

3. A leather coater according to claim 2, wherein: the cross section of vacuum adsorption seat (12) is the I-shaped, and its side of buckling bottom inner wall is the inclined plane, square groove (121) have been seted up to the inside of vacuum adsorption seat (12), square groove (121) and exhaust tube (151) through connection, first motor (122) are installed to one side of vacuum adsorption seat (12), the output shaft of first motor (122) passes the lateral wall of vacuum adsorption seat (12), and output shaft outside has cup jointed band pulley (125), band pulley (125) are located square groove (121), the quantity of band pulley (125) is two, and distributes at the both ends of square groove (121), two band pulley (125) between cup joint conveyer belt (123), through-hole (1231) have evenly been seted up on conveyer belt (123).

4. A leather coater according to claim 3, wherein: the top of the conveyor belt (123) protrudes out of the inner wall of the top of the bent side in the vacuum adsorption seat (12), and a sealing strip (124) is arranged at a gap between the raised part and the notch of the square groove (121).

5. A leather coater according to claim 1, wherein: a sealing ring (228) is fixedly arranged on one side of each layer sheet (221) through bonding, the sealing ring (228) is in contact with the adjacent layer sheet (221), and one end of each elastic traction wire (229) is connected with one side of each layer sheet (221).