阅读说明：本技术 一种用于卷绕成膜设备的图案生成辊装置 (Pattern generation roller device for winding film forming equipment ) 是由 杜雪峰 郝明 李成林 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种用于卷绕成膜设备的图案生成辊装置,主要包括辊体和低真空泵；辊体为双层机构,包括内辊和外辊；外辊辊面为网状结构,上面布置有网孔阵列；内辊的辊壁上布置有吸收孔阵列；吸收孔阵列中的吸收孔与网孔阵列中的网孔之间通过吸收管道相连,吸收孔和网孔之间一一对应；内辊内部为空腔结构,内辊的端部与低真空泵相连,低真空泵将内辊内部抽成相对于工作腔室内气压的负压；图案生成辊装置通过负压吸收对绕经辊体的柔性基膜上尚未成型的湿膜层进行部分去除,从而在柔性基膜上形成具有特定图案的膜层。(The invention discloses a pattern generation roller device for winding film forming equipment, which mainly comprises a roller body and a low vacuum pump; the roller body is a double-layer mechanism and comprises an inner roller and an outer roller; the surface of the outer roller is of a net structure, and a mesh array is arranged on the surface of the outer roller; an absorption hole array is arranged on the roller wall of the inner roller; the absorption holes in the absorption hole array are connected with the meshes in the mesh array through absorption pipelines, and the absorption holes correspond to the meshes one to one; the inner part of the inner roller is of a cavity structure, the end part of the inner roller is connected with a low vacuum pump, and the low vacuum pump pumps the inner part of the inner roller into negative pressure relative to the air pressure in the working chamber; the pattern generating roller device partially removes the wet film layer which is not formed on the flexible base film wound around the roller body through negative pressure absorption, thereby forming a film layer with a specific pattern on the flexible base film.)

1. A pattern generation roller device for winding film forming equipment mainly comprises a roller body and a low vacuum pump; the roller body is a double-layer mechanism and comprises an inner roller and an outer roller; the surface of the outer roller is of a net structure, and a mesh array is arranged on the surface of the outer roller; an absorption hole array is arranged on the roller wall of the inner roller; the absorption holes in the absorption hole array are connected with the meshes in the mesh array through absorption pipelines; the inner part of the inner roller is of a cavity structure, the end part of the inner roller is connected with a low vacuum pump, and the low vacuum pump pumps the inner part of the inner roller into negative pressure relative to the external air pressure of the roller body; the pattern generating roller device partially removes the wet film layer which is not formed on the flexible base film wound around the roller body through negative pressure absorption, thereby forming a film layer with a specific pattern on the flexible base film.

2. The pattern generation roller device for a roll film forming apparatus according to claim 1, characterized in that: the inner side of the roller wall of the inner roller is provided with a covering cylinder slot; the masking cartridge is insertable within the masking cartridge slot and has an expanded shape corresponding to a particular pattern of a film layer to be formed on the flexible base film.

3. The pattern generation roller device for a roll film forming apparatus according to claim 2, characterized in that: the shielding cylinder shields and seals some absorption holes in the absorption hole array on the roller wall from the inner side of the roller wall of the inner roller; when the pattern generating roller device works, the negative pressure of the inner roller can generate negative pressure absorption on the wet film layer covered on the meshes from the absorption holes which are not shielded through the absorption pipes and the meshes which are connected with the absorption holes, so that the wet film layer on the flexible base film which is wound on the roller body is removed.

4. The pattern generation roller device for a roll film forming apparatus according to claim 1, characterized in that: the pattern generating roller device further includes a controller; an electric control valve is arranged on the absorption pipeline; after the controller receives the pattern generation instruction, the electronic control valves on some absorption pipelines are opened according to a preset pattern generation program, the negative pressure of the inner roller can generate negative pressure absorption on the wet film layer covered on the meshes from the absorption pipelines through the absorption holes and the meshes connected with the absorption pipelines, and therefore the wet film layer on the flexible base film wound on the roller body is removed.

5. The pattern generation roller device for a roll film forming apparatus according to claim 1, characterized in that: through controlling the exhaust speed of the low vacuum pump, the negative pressure absorption strength of the roller body on the wet film layer can be adjusted, and the part of the wet film layer covering the mesh is completely or partially removed.

6. The pattern generation roller device for a roll film forming apparatus according to claim 4, characterized in that: the controller can independently adjust the opening of the electric control valves on some absorption pipelines to independently control the negative pressure absorption strength of the controlled meshes connected with the absorption pipelines to the wet film layer, so that the wet film layer covered on the controlled meshes is completely or partially removed.

7. The pattern generation roller device for a roll film forming apparatus according to claim 6, characterized in that: the controller respectively controls the negative pressure absorption strength of the wet film layer by the adjacent meshes, so that the trend of gradual change is formed between the negative pressure absorption strengths of the adjacent meshes, and the wet film layer covering the adjacent meshes forms a groove pattern with continuously and gradually changed depth.

8. The pattern generation roller device for a roll film forming apparatus according to claim 6, characterized in that: the controller forms patterns with different depths on the multiple areas of the wet film layer by respectively controlling the negative pressure absorption strength of the meshes of the multiple areas to the wet film layer.

9. The pattern generation roller device for a roll film forming apparatus according to claim 1, characterized in that: a pattern generating roller device is disposed downstream of the coating module.

Technical Field

The invention belongs to the technical field of roll-to-roll film preparation, and particularly relates to a pattern generating roller device for a winding film forming device.

Background

In recent years, there is an increasing demand for patterning of flexible thin films, and it is required to etch fine grooves or specific patterns, such as nano silver wire transparent conductive films, graphene-silicon rubber composite films, microfluidic chip unit layers, etc., on a flexible substrate. At present, etching or hot embossing and other technologies are generally adopted for film patterning on a flexible substrate, but the two film patterning technologies have various defects when being implemented on certain flexible film products.

The etching technology needs to be implemented by adopting a photoresist and a precision mask, the photoresist is not easy to be uniformly distributed on the flexible substrate, the patterning effect can be influenced, in addition, the cost of the precision mask is higher, the production of a patterned flexible thin film product with flexible and changeable patterns is not facilitated, and more importantly, the etching technology is difficult to etch patterns with different depths in the same film layer. When the hot stamping technology is used for patterning, the thin film substances in the pattern grooves are pushed downwards or to the periphery by extrusion, so that the density difference of all parts of the thin film layer can be caused, and adverse effects are brought to certain purposes; in addition, when hot stamping is used for patterning, the film material is extruded and heated for shaping, so that the properties of some organic film materials are changed, and the strength and the conductivity of the film are affected.

Disclosure of Invention

In order to solve the above problems, the present invention provides a pattern generating roller device for a winding film forming apparatus, mainly comprising a roller body and a roughing pump; the roller body is a double-layer mechanism and comprises an inner roller and an outer roller; the surface of the outer roller is of a net structure, and a mesh array is arranged on the surface of the outer roller; an absorption hole array is arranged on the roller wall of the inner roller; the absorption holes in the absorption hole array are connected with the meshes in the mesh array through absorption pipelines, and the absorption holes correspond to the meshes one to one; the inner part of the inner roller is of a cavity structure, the end part of the inner roller is connected with a low vacuum pump, and the low vacuum pump pumps the inner part of the inner roller into negative pressure relative to the external air pressure of the roller body; the pattern generating roller device partially removes the wet film layer which is not formed on the flexible base film wound around the roller body through negative pressure absorption, thereby forming a film layer with a specific pattern on the flexible base film.

The inner side of the roller wall of the inner roller is provided with a covering cylinder slot; the masking cartridge is insertable within the masking cartridge slot and has an expanded shape corresponding to a particular pattern of a film layer to be formed on the flexible base film.

The shielding cylinder shields and seals some absorption holes in the absorption hole array on the roller wall from the inner side of the roller wall of the inner roller; when the pattern generating roller device works, the negative pressure of the inner roller can generate negative pressure absorption on the wet film layer covered on the meshes from the absorption holes which are not shielded through the absorption pipes and the meshes which are connected with the absorption holes, so that the wet film layer on the flexible base film which is wound on the roller body is removed.

Through controlling the exhaust speed of the low vacuum pump, the negative pressure absorption strength of the roller body on the wet film layer can be adjusted, and the part of the wet film layer covering the mesh is completely or partially removed.

In one embodiment of the present invention, the pattern generating roller device further comprises a controller; an electric control valve is arranged on the absorption pipeline; after the controller receives the pattern generation instruction, the electronic control valves on some absorption pipelines are opened according to a preset pattern generation program, the negative pressure of the inner roller can generate negative pressure absorption on the wet film layer covered on the meshes from the absorption pipelines through the absorption holes and the meshes connected with the absorption pipelines, and therefore the wet film layer on the flexible base film wound on the roller body is removed.

The controller can independently adjust the opening of the electric control valves on some absorption pipelines to independently control the negative pressure absorption strength of the controlled meshes connected with the absorption pipelines to the wet film layer, so that the wet film layer covered on the controlled meshes is completely or partially removed.

The controller respectively controls the negative pressure absorption strength of the wet film layer by the adjacent meshes, so that the trend of gradual change is formed among the negative pressure absorption strengths of the adjacent meshes, the wet film layer covering the adjacent meshes forms a groove pattern with continuously and gradually changed depth, and the shaped film layer has the groove pattern with continuously and gradually changed depth.

The controller can form patterns with different depths on a plurality of areas of the wet film layer by respectively controlling the negative pressure absorption strength of the meshes of the plurality of areas to the wet film layer, so that the shaped film layer has the patterns with different depths in different areas.

The two embodiments of the pattern generation roller device for forming the groove pattern with continuously-changed depth in the film layer and enabling the film layer to have the pattern with different depths on different areas are significant in the generation of the grooves on the microfluidic unit layer. The pattern generation roller device can be used for preparing the microfluidic unit layers with groove patterns with different depths, and the groove patterns are controllable in depth, so that the microfluidic chip can realize high-difficulty microfluidic functions such as screening and interception of particles with different scales.

The winding film-forming equipment in which the pattern generation roller device is arranged further comprises a working chamber, a coating module and a shaping module, and the pattern generation roller device is arranged at the downstream of the coating module. The sizing module is positioned downstream of the pattern generating roller device; the shaping module adopts one curing form selected from light heating curing, drying box heating curing or ultraviolet light curing to carry out curing and shaping on the wet film layer to form the flexible film layer with a specific pattern.

A laminating roller is arranged at the downstream of the shaping module; the number of the laminating rollers is 2, and the laminating rollers are oppositely arranged; a protective film winding roller is arranged in the working chamber; the laminating roller is used for pressing and covering the protective film from the protective film roller on the surface of the shaped flexible film layer to protect the film layer on the flexible base film.

A vacuum system and an inflation system are arranged on the working chamber; the vacuum system is used for creating a clean vacuum environment in the working chamber, and the inflation system is used for inflating working gas. Before the flexible film is prepared, gas in the working chamber is firstly pumped out through a vacuum system to enable the vacuum degree in the working chamber to reach more than 10Pa (namely, the pressure reaches below 10 Pa), then working gas is introduced into the working chamber through an inflation system, and the gas pressure in the working chamber is controlled within the range of 0.01 MPa-0.1 MPa.

The pattern generating roller device is applied to the preparation of graphene-silicon rubber composite flexible film products, can absorb part of wet film layers through negative pressure to generate patterns, and can enable the graphene-silicon rubber composite flexible film to keep original mechanical properties, heat resistance and electrical properties.

The invention has the beneficial effects that:

the pattern generating roller device enables the wet film layer to generate a set pattern through a negative pressure absorption process, then the wet film layer is solidified and shaped through the shaping module to form a flexible film with a specific pattern, and the original character of the film layer is patterned on the flexible film without damage; the flexible film patterning with various flexible and variable patterns can be realized by adopting an interpolation type covering barrel and an independently controllable absorption pipeline, and the large-scale mass production of the flexible film with flexible and variable patterns can be realized at low cost. Particularly, the invention has great significance in the generation of the grooves on the microfluidic unit layer, the microfluidic unit layer with groove patterns with different depths can be prepared by applying the pattern generation roller device of the invention, and the depth of the groove patterns can be controlled, so that the microfluidic chip can realize high-difficulty microfluidic functions such as screening, interception and the like on particles with different scales.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a pattern generating roll apparatus of the present invention;

FIG. 2 is a schematic structural view of another embodiment of the pattern generating roll apparatus of the present invention;

FIG. 3 is a schematic diagram of the structure of the pattern generating roller device of the present invention implemented on a winding film forming apparatus.

Detailed Description

The following further describes the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are intended for purposes of illustration and explanation only and are not intended to limit the scope of the invention.

Fig. 1 is a schematic structural view of one embodiment of the pattern generating roller device of the present invention, and as shown in the figure, the pattern generating roller device for a winding film forming apparatus of the present invention mainly includes a roller body 1 and a roughing pump 2; the roller body 1 is a double-layer mechanism and comprises an inner roller 3 and an outer roller 4; the surface of the outer roller 4 is of a net structure, and a mesh array is arranged on the surface; an absorption hole array is arranged on the roller wall of the inner roller 3; the absorption holes 5 in the absorption hole array are connected with the meshes 6 in the mesh array through absorption pipelines 7, and the absorption holes correspond to the meshes one by one; the inner part of the inner roller 3 is of a cavity structure, the end part of the inner roller 3 is connected with a low vacuum pump 2, and the low vacuum pump 2 pumps the inner part of the inner roller into negative pressure relative to the air pressure in the working chamber; the pattern generating roller device partially removes the wet film layer, which is not yet formed, on the flexible base film wound around the roller body 1 by negative pressure absorption, thereby forming a film layer having a specific pattern on the flexible base film.

The inner side of the roller wall of the inner roller 3 is provided with a covering cylinder slot; the masking cartridge 8 is insertable into the masking cartridge slot, the masking cartridge 8 having an expanded shape corresponding to a particular pattern of a film layer to be formed on the flexible base film.

The shielding cylinder 8 shields and seals some absorption holes in the absorption hole array on the roller wall from the inner side of the roller wall of the inner roller 3; when the pattern generating roller device works, the negative pressure of the inner roller can generate negative pressure absorption on the wet film layer covered on the meshes from the absorption holes which are not shielded through the absorption pipes and the meshes which are connected with the absorption holes, so that the wet film layer on the flexible base film which is wound on the roller body is removed.

By controlling the exhaust speed of the low vacuum pump 2, the negative pressure absorption strength of the roller body to the wet film layer can be adjusted, and the part of the wet film layer covering the mesh is completely or partially removed.

Fig. 2 is a schematic structural view of another embodiment of the pattern generating roller device of the present invention. As shown, in this embodiment, the pattern generating roller device further comprises a controller; an electric control valve 9 is arranged on the absorption pipeline 7; after the controller receives the pattern generation instruction, the electronic control valves on some absorption pipelines are opened according to a preset pattern generation program, the negative pressure of the inner roller can generate negative pressure absorption on the wet film layer covered on the meshes from the absorption pipelines through the absorption holes and the meshes connected with the absorption pipelines, and therefore the wet film layer on the flexible base film wound on the roller body is removed. The controller can independently adjust the opening of the electric control valves on some absorption pipelines to independently control the negative pressure absorption strength of the controlled meshes connected with the absorption pipelines to the wet film layer, so that the wet film layer covered on the controlled meshes is completely or partially removed. The controller respectively controls the negative pressure absorption strength of the wet film layer by the adjacent meshes, so that the trend of gradual change is formed among the negative pressure absorption strengths of the adjacent meshes, the wet film layer covering the adjacent meshes forms a groove pattern with continuously and gradually changed depth, and the shaped film layer has the groove pattern with continuously and gradually changed depth. In addition, the controller can form patterns with different depths on a plurality of areas of the wet film layer by respectively controlling the negative pressure absorption strength of the meshes of the plurality of areas to the wet film layer, so that the shaped film layer has the patterns with different depths in different areas.

FIG. 3 is a schematic diagram of the structure of the pattern generating roller device of the present invention implemented on a winding film forming apparatus. As shown in the figure, the winding film-forming apparatus further includes a work chamber 10, a coating module 11, a sizing module 12, and a wind-up roll 18, and a pattern-generating roll device 13 is disposed downstream of the coating module 11. The coating module 11 coats a coating material on the surface of the flexible base film to form a wet film layer; a pattern generating roller device 13 arranged at the downstream of the coating module 11 partially removes the unformed wet film layer on the flexible base film wound by the roller body through a negative pressure absorption process, so that the wet film layer generates a set pattern; the sizing module 12 is located downstream of the pattern generating roller device 13; the shaping module 12 adopts one curing form selected from light heating curing, drying oven heating curing or ultraviolet light curing to cure and shape the wet film layer to form a flexible film layer with a specific pattern.

Downstream of the shaping module 12 there is provided a lamination roller 14; the number of the laminating rollers is 2, and the laminating rollers are oppositely arranged; a protective film winding roller 15 is arranged in the working cavity; the laminating roller is used for pressing and covering the protective film from the protective film roller 15 on the surface of the shaped flexible film layer to protect the film layer on the flexible base film.

A vacuum system 16 and an inflation system 17 are arranged on the working chamber; the vacuum system 16 is used to create a clean vacuum environment within the working chamber 10 and the inflation system 17 is used to inflate the working gas. Before the flexible film is prepared, gas in the working chamber is firstly pumped out through a vacuum system to enable the vacuum degree in the working chamber to reach more than 10Pa (namely, the pressure reaches below 10 Pa), then working gas is introduced into the working chamber through an inflation system, and the gas pressure in the working chamber is controlled within the range of 0.01 MPa-0.1 MPa.