CN111299090B

CN111299090B - Automatic uniform smearing device and application thereof in preparation of conductive film

Info

Publication number: CN111299090B
Application number: CN201811508321.7A
Authority: CN
Inventors: 潘敏强; 董关平; 钟喜能; 黄平南
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2021-09-21
Anticipated expiration: 2038-12-11
Also published as: CN111299090A

Abstract

The invention belongs to the field of smearing devices, and discloses an automatic uniform smearing device and application thereof in preparation of a conductive film. The automatic uniform smearing device comprises a bottom plate, an underframe, a roller and a transmission system; the chassis is arranged on a slide rail of the bottom plate, and the transmission system controls the chassis to move back and forth on the slide rail; the roller realizes the fixed connection of the roller and the chassis in the horizontal direction and the elastic connection in the vertical direction through a roller wedge block and a spring, and a guide wedge block is arranged on the roller wedge block to realize the sliding connection in the left-right direction and the fixed connection in the front-back direction; the left and right guide wedge blocks are respectively connected with a left guide rod and a right guide rod, and the left and right guide rods control the distance of the left and right guide wedge blocks in the left and right directions to be adjustable. The coating device disclosed by the invention has the advantages of good coating effect, convenience in fine adjustment of height, capability of realizing automatic blade coating, capability of effectively improving the coating efficiency, uniformity and working efficiency of the solution, and very positive application and popularization values.

Description

Automatic uniform smearing device and application thereof in preparation of conductive film

Technical Field

The invention belongs to the field of smearing devices, and particularly relates to an automatic uniform smearing device and application thereof in preparation of a conductive film.

Background

The transparent conductive film is mainly applied to liquid crystal display screens, touch screens, organic light emitting diodes and photovoltaic devices, but with the increasing demand of optoelectronic devices, the traditional ITO film has the main materials comprising rare elements of indium and tin, with the increasing demand, the price is continuously increased, and the indium has toxicity and the oxide itself has no flexibility, and can not meet the development requirements of future flexible optoelectronic devices, so that substitute products are needed to be found, at present, the films of silver nanowire films, carbon nanotubes, conductive polymers and the like have excellent photoelectric properties, have very good flexibility and are nontoxic, and are gradually valued by researchers, but no matter the silver nanowire films or the carbon nanotubes and the conductive polymer films, the solution needs to be uniformly coated on a flexible substrate during preparation, such as the silver nanowire conductive films, it is necessary to uniformly spread the silver nanowire diluted solution on the flexible PET substrate or the glass substrate, for example, the random silver network is prepared by uniformly spreading the cracking solution on the flexible PET substrate or the glass substrate. However, the existing method for smearing the chapping liquid is commonly used to smear the chapping liquid or the silver nano-solution directly on the substrate through a straight plate, and the laboratory generally does not need to prepare in a large area, so the typical method generally adopts a wheat tooth stick to scrape by hand, relatively speaking, the wheat tooth stick rolling scrape is more uniform than the straight plate scrape, but both scrape methods have defects, firstly, the major defect of the straight plate scrape is that in the scrape process, if a little hard impurity exists at a certain position, the impurity can be caused to spread backwards in the scrape process to generate a continuous defect, and further the required film is damaged in a large area, although the wheat tooth stick can well solve the problem, the wheat tooth stick can only be used in the laboratory, because the wheat tooth sticks are all fixed in height, namely, the silver nano-wire solution prepared by different wheat tooth sticks can only be fixed in thickness, this just has a problem that can not reach automatically regulated solution thickness, because the thickness of paining directly determines the performance of film, like silver nano wire solution, the thickness of paining directly leads to the density change of silver nano wire, and then leads to directly influencing photoelectric properties, but current paining device will be or scribble the effect poor, can only use in the laboratory if can not adjust the height, consequently, in order to improve the efficiency of preparing the film electrode, just need design a degree of automation height, solution scribble effectual, the homogeneity is good and conveniently adjust the solution thickness scribble the device.

Disclosure of Invention

In view of the above disadvantages and shortcomings of the prior art, a primary object of the present invention is to provide an automatic and uniform application device. The device can realize on the one hand evenly scribbling the function on the substrate in transparent conductive film preparation with solution, can also realize doing the fine setting to the thickness of solution, realizes that solution thickness is adjustable and is a very important parameter to preparation transparent conductive film, and it can directly control transparent conductive film's photoelectric property, and the homogeneity of secondly scribbling can decide the quality of conductive film itself.

The invention also aims to provide the application of the automatic uniform coating device in preparing the conductive film.

The purpose of the invention is realized by the following technical scheme:

an automatic uniform smearing device comprises a bottom plate, an underframe, a roller and a transmission system; two parallel slide rails are fixedly arranged on the left and right sides of the bottom plate, and the bottom frame is matched with the slide rails and can move back and forth on the slide rails; the roller is arranged on a left roller wedge block and a right roller wedge block through a shaft and a bearing, a limiting column is arranged below the roller wedge blocks, a limiting hole is respectively arranged on the left and the right of the underframe, the limiting column is inserted into the limiting hole to realize the fixation of the roller and the underframe in the horizontal direction, and a spring is sleeved on the limiting column, is arranged between the underframe and the roller wedge blocks and is in a compressed state to realize the elastic connection of the roller and the underframe in the vertical direction; a guide wedge block is respectively arranged above the left roller wedge block and the right roller wedge block, and the inclined surface of the roller wedge block is tightly contacted with the inclined surface of the guide wedge block to realize sliding connection in the left-right direction and fixed connection in the front-back direction; the upper surface of the guide wedge block is provided with an underframe guide groove along the left-right direction, the underframe guide groove is provided with an underframe guide block in a matching way to realize sliding connection in the left-right direction and fixed connection in the front-back direction, and the underframe guide block is fixed on the underframe; the left and right guide wedge blocks are respectively connected with a left and right guide rod, and the left and right guide rods control the distance of the left and right guide wedge blocks in the left and right directions to be adjustable; the transmission system controls the chassis to move back and forth on the slide rail.

Furthermore, the diameter of the roller is 30-40 mm, and the length of the roller is 300-500 mm.

Furthermore, the side of each roller wedge-shaped block is provided with a connecting column, the connecting columns are hollow and provided with connecting holes, and the rollers are inserted into the connecting holes through shafts and are installed on the left roller wedge-shaped block and the right roller wedge-shaped block.

Furthermore, a spring limiting hole is formed around the limiting column on the roller wedge block in a concave mode. The spring limiting hole can further fix a spring sleeved on the limiting column.

Furthermore, the inclined plane of the guide wedge block is of a groove structure, the inclined plane of the roller wedge block is embedded into the groove structure in a matched mode, and the inclined plane of the roller wedge block is in close contact with the inclined plane of the guide wedge block to achieve sliding connection in the left-right direction and fixed connection in the front-back direction.

Further, the inclined plane angle of the roller wedge block and the guide wedge block is 30 degrees.

Further, set up the guide bar mounting hole on the guide wedge, control guide bar one end and insert fixed connection in the guide bar mounting hole of controlling two guide wedges respectively, control the guide bar other end and control the stopper about fixed connection respectively, control the stopper and pass through bolted connection, control and set up the spring between the stopper, the spring housing is located on the bolt and is in compression state, control stopper distance regulation about the effect of bolt and spring is realized under the bolt.

Furthermore, a left guide pipe and a right guide pipe are fixedly arranged on the underframe along the left-right direction, and the left guide rod and the right guide rod respectively penetrate through the left guide pipe and the right guide pipe so as to realize the fixation of the guide rods in the front-back direction and the up-down direction.

Further, transmission system includes step motor, and step motor passes through the coupling joint drive screw, and drive screw passes through the bearing frame and is fixed in bottom plate one side along the fore-and-aft direction, and the cooperation sets up the lead screw drive piece that the internal surface is transmission screw thread on the drive screw, and lead screw drive piece passes through screw fixed connection with chassis one side.

The application of the automatic uniform smearing device in the preparation of the conductive film comprises the following application processes: firstly, a substrate is placed on a bottom plate of an automatic uniform smearing device, a film material solution is piled on the substrate and positioned at one end of a roller, and a transmission system is used for controlling the chassis to move back and forth on a sliding rail so as to achieve the function of driving the roller to move back and forth; the distance between the left guide wedge block and the right guide wedge block is controlled by the left guide rod and the right guide rod to be adjusted in the left-right direction, so that the function of adjusting the distance between the roller and the substrate is achieved, and the uniform smearing of the film material solution and the adjustment of the thickness of the film material solution are realized.

The working principle of the invention is specifically exemplified as follows: (1) the working principle of the front and back movement of the roller is as follows: the stepping motor generates rotary motion and drives the transmission screw rod to rotate through the coupler. The lead screw transmission block moves horizontally back and forth under the action of the transmission lead screw, and the lead screw transmission block is connected to the bottom frame through a screw and the bottom frame is connected with the sliding rail in a matching way, so that the bottom frame can be driven to move horizontally back and forth while the lead screw transmission block moves horizontally back and forth. The roller and the chassis are fixedly connected together in the front-back direction under the action of the roller wedge block and the guide wedge block, so that the roller and the chassis move horizontally and forwards. That is, when the stepping motor rotates forward and backward, the roller moves horizontally forward and backward. (2) The working principle of vertical up-and-down movement of the roller is as follows: when the bolts of the left and right limiting blocks are connected in a forward or reverse rotating mode, the left limiting block and the right limiting block can move close to or away from each other in a micro-scale mode under the action of the bolts and the springs, and the left limiting block and the right limiting block are fixedly connected with the guide rods on the left side and the right side, so that the guide rods on the two sides can also move close to or away from each other in a micro-scale mode. The left and right guide wedge blocks are respectively and fixedly connected to the guide rods on the two sides, so that the guide wedge blocks on the two sides can move slightly to approach or leave along with the guide rods. And because the roller wedge blocks on the two sides are closely contacted with the guide wedge blocks in an inclined surface contact mode to realize sliding connection in the left-right direction, when the guide wedge blocks on the two sides slide left and right in a close or far manner, the roller wedge blocks on the two sides can simultaneously slightly move downwards or upwards under the action of springs at the bottom of the roller wedge blocks. The roller is fixedly connected with the roller wedge blocks at two sides through the bearing and the roller shaft, so that when the roller wedge blocks move slightly downwards or upwards, the roller can also move slightly downwards or upwards. Therefore, the position of the roller can be finely shifted downward or upward by rotating the bolt in the forward or reverse direction.

The smearing device and the application of the smearing device have the following advantages and beneficial effects:

the coating device solves the problems of difficult height fine adjustment and poor coating effect of the existing equipment for preparing the conductive film in the coating of silver nanowires or carbon nanotubes and conductive polymer solution, has good coating effect and convenient height fine adjustment, can realize automatic coating, can effectively improve the coating efficiency and uniformity of the solution and the working efficiency, and has very positive application and popularization values.

Drawings

FIG. 1 is a schematic view of the overall structure of an automatic uniform coating device according to an embodiment of the present invention;

FIGS. 2 and 3 are schematic views of the overall structure of the automatic uniform application device in different axial directions according to the embodiment of the present invention;

FIG. 4 is a schematic view of a partially enlarged structure of a bonding portion of a roller wedge and a guide wedge of the automatic uniform application device in the embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a roller wedge of the automatic uniform coating device in the embodiment of the invention;

FIG. 6 is a schematic structural view of a guide wedge of the automatic uniform application device in an embodiment of the present invention;

the numbering in the figures is as follows: the device comprises a base plate 1, a base frame 2, a roller 3, a stepping motor 4, a coupler 5, a transmission screw 6, a bearing seat 7, a screw transmission block 8, a slide rail 9, a roller wedge block 10, a spring 11, a guide wedge block 12, a guide wedge block 13, a base frame guide groove 14, a base frame guide block 15, a guide rod mounting hole 16, a guide rod 17, a limiting block 18, a bolt 18 and a guide pipe 19.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Examples

Fig. 1 is a schematic view of an overall structure of an automatic uniform application device according to the present embodiment; the overall structural schematic diagrams along different axial side directions are respectively shown in fig. 2 and fig. 3; a partial enlarged structural schematic diagram of a joint part of the roller wedge block and the guide wedge block is shown in figure 4. The automatic uniform smearing device comprises a bottom plate 1, an underframe 2, a roller 3 and a transmission system; the transmission system comprises a stepping motor 4, the stepping motor 4 is connected with a transmission lead screw 6 through a coupler 5, the transmission lead screw 6 is fixed on one side of the bottom plate 1 along the front-back direction through a bearing seat 7, a lead screw transmission block 8 with the inner surface being transmission threads is arranged on the transmission lead screw 6 in a matched mode, and the lead screw transmission block 8 is connected with one side of the bottom frame 2 through screws. Two parallel slide rails 9 are fixedly arranged on the left and right of the bottom plate 1, and the bottom frame 2 is matched with the slide rails 9 and can move back and forth on the slide rails 9; the roller 3 is arranged on a left roller wedge block 10 and a right roller wedge block 10 through a shaft and a bearing, a limiting column is arranged below the roller wedge blocks 10, a limiting hole is respectively arranged on the left side and the right side of the underframe, the limiting columns are inserted into the limiting holes to realize the fixation of the roller and the underframe in the horizontal direction, and a spring 11 is sleeved on the limiting columns, is arranged between the underframe and the roller wedge blocks and is in a compressed state to realize the elastic connection of the roller and the underframe in the vertical direction; a guide wedge block 12 is respectively arranged above the left and right roller wedge blocks 10, and the inclined surfaces of the roller wedge blocks are in close contact with the inclined surfaces of the guide wedge blocks to realize sliding connection in the left and right direction and fixed connection in the front and back direction; an underframe guide groove 13 is formed in the upper surface of the guide wedge block 12 along the left-right direction, an underframe guide block 14 is arranged on the underframe guide groove 13 in a matched mode to realize sliding connection in the left-right direction and fixed connection in the front-back direction, and the underframe guide block 14 is fixed on the underframe 2; the left and right guide wedges 12 are respectively provided with a left and right guide rod 16 fixedly connected with a guide rod mounting hole 15, the other end of the left and right guide rod is respectively fixedly connected with a left and right limiting block 17, the left and right limiting blocks 17 are connected through a bolt 18, a spring is arranged between the left and right limiting blocks, the spring is sleeved on the bolt 18 and is in a compression state, the distance between the left and right limiting blocks 17 in the left and right direction is adjusted under the action of the rotation of the bolt and the spring, and therefore the distance between the left and right guide wedges 16 and the left and right guide wedges 12 in the left and right direction is adjustable. The left and right guide rods 16 pass through left and right guide pipes 19 fixedly provided on the chassis in the left-right direction, respectively, to achieve fixation of the guide rods in the front-rear and up-down directions.

In this embodiment, the diameter of the roller is 30-40 mm, and the length is 300-500 mm.

As shown in fig. 5, in the present embodiment, a connecting column 101 is disposed on a side surface of the drum wedge 10, a connecting hole 102 is disposed in the connecting column in a hollow manner, and the drum is installed on the left and right drum wedges by inserting a shaft into the connecting hole. Spring limiting holes 104 are formed around limiting columns 103 on the roller wedge blocks in a concave mode. The spring limiting hole can further fix a spring sleeved on the limiting column.

As shown in fig. 6, in the embodiment, the inclined surface of the guide wedge block 12 is configured as a groove structure 121, the inclined surface of the roller wedge block 10 can be fittingly embedded into the groove structure, and the inclined surface of the roller wedge block is in close contact with the inclined surface of the guide wedge block to realize sliding connection in the left-right direction and fixed connection in the front-back direction.

In the embodiment, the inclined plane angles of the roller wedge block and the guide wedge block are both 30 degrees.

The application of the automatic uniform smearing device in the preparation of the transparent conductive film comprises the following application processes: firstly, a substrate is placed on a bottom plate of an automatic uniform smearing device, a conductive film material solution is accumulated at one end of a roller, and the bottom plate is controlled by a transmission system to move back and forth on a sliding rail so as to drive the roller to move back and forth; the distance between the left guide wedge block and the right guide wedge block is controlled by the left guide rod and the right guide rod to be adjusted in the left-right direction, so that the function of adjusting the distance between the roller and the substrate is achieved, and the solution is uniformly coated and the thickness of the solution is adjusted.

The specific working process is as follows: (1) the stepping motor generates rotary motion and drives the transmission screw rod to rotate through the coupler. The lead screw transmission block moves horizontally back and forth under the action of the transmission lead screw, and the lead screw transmission block is connected to the bottom frame through a screw and the bottom frame is connected with the sliding rail in a matching way, so that the bottom frame can be driven to move horizontally back and forth while the lead screw transmission block moves horizontally back and forth. The roller and the chassis are fixedly connected together in the front-back direction under the action of the roller wedge block and the guide wedge block, so that the roller and the chassis move horizontally and forwards. That is, when the stepping motor rotates forward and backward, the roller moves horizontally forward and backward. (2) When the bolts of the left and right limiting blocks are connected in a forward or reverse rotating mode, the left limiting block and the right limiting block can move close to or away from each other in a micro-scale mode under the action of the bolts and the springs, and the left limiting block and the right limiting block are fixedly connected with the guide rods on the left side and the right side, so that the guide rods on the two sides can also move close to or away from each other in a micro-scale mode. The left and right guide wedge blocks are respectively and fixedly connected to the guide rods on the two sides, so that the guide wedge blocks on the two sides can move slightly to approach or leave along with the guide rods. And because the roller wedge blocks on the two sides are closely contacted with the guide wedge blocks in an inclined surface contact mode to realize sliding connection in the left-right direction, when the guide wedge blocks on the two sides slide left and right in a close or far manner, the roller wedge blocks on the two sides can simultaneously slightly move downwards or upwards under the action of springs at the bottom of the roller wedge blocks. The roller is fixedly connected with the roller wedge blocks at two sides through the bearing and the roller shaft, so that when the roller wedge blocks move slightly downwards or upwards, the roller can also move slightly downwards or upwards. Therefore, the position of the roller can be finely shifted downward or upward by rotating the bolt in the forward or reverse direction.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. The utility model provides an automatic evenly paint device which characterized in that: the automatic uniform smearing device comprises a bottom plate, an underframe, a roller and a transmission system; two parallel slide rails are fixedly arranged on the left and right sides of the bottom plate, and the bottom frame is matched with the slide rails and can move back and forth on the slide rails; the roller is installed on a left roller wedge block and a right roller wedge block through a shaft and a bearing, a limiting column is arranged below the roller wedge blocks, a limiting hole is respectively arranged on the left and the right of the underframe, the limiting column is inserted into the limiting hole to realize the fixation of the roller and the underframe in the horizontal direction, a spring is sleeved on the limiting column, and the spring is arranged between the underframe and the roller wedge blocks and is in a compressed state to realize the elastic connection of the roller and the underframe in the vertical direction; a guide wedge block is arranged above each of the left roller wedge block and the right roller wedge block, the inclined surface of each guide wedge block is of a groove structure, and the inclined surfaces of the roller wedge blocks are embedded into the groove structures in a matched mode; the upper surface of the guide wedge block is provided with an underframe guide groove along the left-right direction, the underframe guide groove is provided with an underframe guide block in a matching way to realize sliding connection in the left-right direction and fixed connection in the front-back direction, and the underframe guide block is fixed on the underframe; the left and right guide wedge blocks are respectively connected with a left and right guide rod, and the left and right guide rods control the distance of the left and right guide wedge blocks in the left and right directions to be adjustable; the transmission system controls the chassis to move back and forth on the slide rail;

set up the guide bar mounting hole on the direction wedge, control guide bar one end and insert fixed connection in the guide bar mounting hole of controlling two direction wedges respectively, control the guide bar other end and control the stopper about fixed connection respectively, control the stopper and pass through bolted connection, control and set up the spring between the stopper, the spring housing is located on the bolt and is in compression state, control the stopper distance regulation of ascending in the left and right sides side under the effect of the rotating of bolt and spring realization.

2. An automatic uniform application device according to claim 1, characterized in that: the diameter of the roller is 30-40 mm, and the length of the roller is 300-500 mm.

3. An automatic uniform application device according to claim 1, characterized in that: the side of the roller wedge-shaped block is provided with a connecting column, the connecting column is hollow and provided with a connecting hole, and the roller is inserted into the connecting hole through a shaft and is arranged on the left roller wedge-shaped block and the right roller wedge-shaped block.

4. An automatic uniform application device according to claim 1, characterized in that: and spring limiting holes are formed around the limiting columns on the roller wedge-shaped blocks in a recessed mode.

5. An automatic uniform application device according to claim 1, characterized in that: the inclined plane angle of the roller wedge block and the guide wedge block is 30 degrees.

6. An automatic uniform application device according to claim 1, characterized in that: the chassis is fixedly provided with a left guide pipe and a right guide pipe along the left-right direction, and the left guide rod and the right guide rod respectively penetrate through the left guide pipe and the right guide pipe.

7. An automatic uniform application device according to claim 1, characterized in that: the transmission system comprises a stepping motor, the stepping motor is connected with a transmission lead screw through a coupler, the transmission lead screw is fixed on one side of the bottom plate along the front-back direction through a bearing seat, a lead screw transmission block with a transmission thread on the inner surface is arranged on the transmission lead screw in a matching mode, and the lead screw transmission block is fixedly connected with one side of the bottom frame through a screw.

8. The use of an automatic uniform application device according to any one of claims 1 to 7 for the preparation of conductive films, characterized in that the application process is as follows: firstly, a substrate is placed on a bottom plate of an automatic uniform smearing device, a film material solution is piled on the substrate and positioned at one end of a roller, and a transmission system is used for controlling the chassis to move back and forth on a sliding rail so as to achieve the function of driving the roller to move back and forth; the distance between the left guide wedge block and the right guide wedge block is controlled by the left guide rod and the right guide rod to be adjusted in the left-right direction, so that the function of adjusting the distance between the roller and the substrate is achieved, and the uniform smearing of the film material solution and the adjustment of the thickness of the film material solution are realized.