CN218112038U - Screen printing screen cloth, tool and equipment - Google Patents

Abstract

The application provides screen printing screen cloth, a tool and equipment, wherein the screen printing screen cloth comprises a plurality of first steel wire groups distributed along a first direction and a plurality of second steel wire groups distributed along a second direction; the first steel wire group at least comprises one steel wire, and the elastic coefficient of the steel wire of the first steel wire group positioned in the middle of the screen printing screen cloth is larger than that of the steel wire of the first steel wire group positioned on the side edge; and/or the second steel wire group at least comprises one steel wire, and the elastic coefficient of the steel wire of the second steel wire group positioned in the middle of the screen printing screen cloth is larger than that of the steel wire of the second steel wire group positioned on the side edge. In above-mentioned technical scheme, the elastic coefficient through setting up many steel wires that are located the printing district reduces to the direction of both sides by the centre gradually, guarantees the even thickness of the figure of printing in the figure printing process, promotes printing quality.

Description

Screen printing screen cloth, tool and equipment

Technical Field

The application relates to the field of printing screens, in particular to a screen printing screen cloth, a tool and equipment.

Background

When the solar cell is manufactured, a cell graph is usually printed on a silicon wafer processed by each previous process in a screen printing mode, and a steel wire mesh cloth is used for assisting in operation in the printing process.

Generally, the steel wires used by the steel wire gauze are uniform in specification, and the diameters and the tensions of the steel wires are uniform, so that in the printing process of pressing and reciprocating scraping by a scraper, the tension of the screen printing plate is uniform, the pressing-down amplitude of the screen printing plate is larger after the middle screen printing plate in a printing pattern area is stressed, the thickness of the middle of a pattern printed on a silicon wafer is smaller, the thicknesses of two ends of the pattern are larger, the thickness of the printed pattern is nonuniform, and the printing quality is reduced.

SUMMERY OF THE UTILITY MODEL

The application provides a screen printing screen cloth, instrument and equipment for promote the homogeneity of the thickness of the figure of printing, promote printing quality.

In a first aspect, a screen printing mesh cloth is provided, which comprises a plurality of first steel wire groups arranged along a first direction and a plurality of second steel wire groups arranged along a second direction;

the first steel wire group at least comprises one steel wire, and the elastic coefficient of the steel wire of the first steel wire group positioned in the middle of the screen printing screen cloth is larger than that of the steel wire of the first steel wire group positioned on the side edge; and/or the presence of a gas in the gas,

the second steel wire group at least comprises one steel wire, and the elastic coefficient of the steel wire of the second steel wire group positioned in the middle of the screen printing screen cloth is larger than that of the steel wire of the second steel wire group positioned on the side edge.

In the technical scheme, the elastic coefficient of the steel wire positioned in the middle is larger than that of the steel wire positioned on the side edge, so that the steel wire positioned in the middle has stronger deformation resistance in the process of scraping a printed pattern by the scraper, the deformation of the steel wire positioned in the middle and the deformation of the steel wire positioned on the side edge tend to be the same, the uniformity of the thickness of the printed pattern is ensured, the phenomenon of uneven thickness of the printed pattern is reduced, and the printing quality is improved.

In a particular embodiment, the diameter of the steel wire with a high spring constant is larger than the diameter of the steel wire with a low spring constant. When actual equipment printing screen cloth, be convenient for distinguish the steel wire of different elastic coefficient, reduce the problem that the use is used together, promote the convenience of using.

In a specific embodiment, the diameter of the steel filaments of the first plurality of steel filament groups and the second plurality of steel filament groups are the same.

The uniformity of being convenient for keep weaving the printing screen cloth of completion reduces to appear and need adjust the interval of steel wire because of the diameter difference of steel wire, in addition, also reduces to appear the operation that need adjust the position of steel wire on printing screen cloth thickness direction under the different circumstances of diameter of steel wire, guarantees the homogeneity of the figure of printing more easily, reduces to cause the destruction because of the homogeneity of steel wire self diameter change to the printing figure.

In a specific embodiment, a polyester mesh is attached to the periphery of the first steel wire group and the second steel wire group.

So, accomplish the weaving operation back of the steel wire of first steel wire group and second steel wire group, connect the limit through the polyester screen cloth to the tip of steel wire, reduce the problem that the printing screen cloth appears in disorder before assembling with the screen frame.

In a specific embodiment, the inner ring of the polyester mesh cloth extends to the inner side of the outer ring edges of the first steel wire group and the second steel wire group;

the polyester mesh cloth, the first steel wire group and the second steel wire group are connected to form a composite area. The firmness of the connection of the polyester mesh cloth, the first steel wire group and the second steel wire group is ensured.

In a specific embodiment, the plurality of first steel wires and the plurality of second steel wires are crossed to form a plurality of meshes with the same size.

The sizes of the meshes are kept the same, so that the problem of uneven printed patterns caused by the change of the sizes of the meshes is reduced, and the uniformity of the printed patterns is improved.

In a second aspect, a screen printing tool is provided, which comprises a rectangular ring-shaped screen frame and any one of the screen printing screen cloth fixedly connected to the inner side of the screen frame.

In a specific possible embodiment, the screen frame comprises two sub-frames arranged in a rectangular ring shape, and the outer ring edge of the screen printing screen cloth is clamped between the two sub-frames.

Assemble the in-process, press from both sides the printing screen cloth and establish between two sub-frames, later to two sub-frames fix can, it is comparatively convenient to operate.

In a third aspect, there is provided a screen printing apparatus comprising the screen printing mesh of any one of the above or the screen printing tool of any one of the above;

the screen printing device further comprises a scraping plate which is abutted to the screen printing screen cloth and slides along the first direction or the second direction relative to the screen printing screen cloth.

When using this screen printing equipment to carry out the figure printing, arrange the screen printing screen cloth in the printing object on, scrape the coating printing with the screen printing screen cloth through the scraper blade and wait to print the object on, and through the improvement to the screen printing screen, can reduce the inhomogeneous phenomenon of figure of printing.

In a particular embodiment, the squeegee slides in the first direction relative to the screen printing mesh when the spring constant of the wires of the first wire group located only in the middle of the screen printing mesh is greater than the spring constant of the wires of the first wire group located at the side edges;

when the elastic coefficient of the steel wires of the second steel wire group only located in the middle of the screen printing screen cloth is larger than that of the steel wires of the second steel wire group located on the side edge, the scraper slides along the second direction relative to the screen printing screen cloth.

The sliding direction of the scraper is the same as the arrangement direction of the steel wires with different elastic coefficients, the supporting force of the steel wires when the scraper slides to the middle position of the screen frame is larger than that of the steel wires when the scraper is positioned at the side, the deformation of the steel wires positioned in the middle of the screen frame and the deformation of the steel wires positioned at the side tend to be the same, and the problem of uneven printed patterns is solved.

Drawings

Fig. 1 is a schematic view of a screen printing tool according to an embodiment of the present application in which only wires of a plurality of first wire groups have different elastic modulus;

fig. 2 is a schematic view of a screen printing tool according to an embodiment of the present application in which only a plurality of second wire groups have different wire elastic coefficients;

fig. 3 is a schematic view illustrating that the elastic coefficients of the steel wires of the first steel wire groups are different from those of the second steel wire groups according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a screen frame provided in an embodiment of the present application.

Description of reference numerals: 1. a screen frame; 11. a sub-frame; 2. a first wire group; 3. a second wire group; 4. polyester mesh cloth; 5. a recombination zone.

Detailed Description

The present application is described in further detail below with reference to the figures and examples. The features and advantages of the present application will become more apparent from the description.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not conflict with each other.

In order to facilitate understanding of the screen printing mesh cloth and the screen printing tool provided in the embodiments of the present application, an application scenario of the screen printing mesh cloth and the screen printing tool is first introduced, it should be understood that the screen printing mesh cloth is a part of the screen printing tool, and the screen printing tool is also a component of the screen printing apparatus, and related descriptions are provided herein with the screen printing apparatus as a main body. The screen printing equipment that this application embodiment provided is used for printing the figure on the silicon chip, when carrying out printing operation, places the screen printing instrument on the silicon chip, later places corresponding printing material on the screen printing screen cloth to use the reciprocal scraping of scraper blade, print the printing material that corresponds to on the silicon chip according to required figure. The embodiment of the application provides a screen printing device for improving the uniformity of the thickness of a printed pattern. The following detailed description is given with reference to the accompanying drawings and examples.

For convenience of explanation, in the embodiments of the present application, "screen printing apparatus" is simply referred to as "printing apparatus", a "screen printing tool" is simply referred to as "printing tool", and a "screen printing screen cloth" is simply referred to as "printing screen cloth".

The printing equipment provided by the application comprises a printing tool and a scraper, wherein the scraper slides in a set direction relative to the printing tool.

Referring to fig. 1, fig. 1 shows an overall structural schematic diagram of a printing tool provided in an embodiment of the present application. The printing tool provided by the embodiment of the application comprises a rectangular and annular net frame 1 and a printing net cloth arranged on the inner side of the net frame 1, wherein the printing net cloth comprises a first steel wire group 2 and a second steel wire group 3 which are arranged in a crossed mode, the number of the first steel wire groups 2 is multiple, and the multiple first steel wire groups 2 are arranged along a first direction and keep parallel; the second steel wire group 3 is also provided with a plurality of second steel wire groups 3 which are arranged along the second direction and are kept parallel.

In addition, the printing screen cloth further comprises polyester screen cloth 4, the polyester screen cloth 4 is arranged along the edge of the outer ring of the rectangular screen cloth formed by the first steel wire groups 2 and the second steel wire groups 3, the polyester screen cloth 4 forms an annular structure, the inner ring is fixedly connected with the steel wires, and the outer ring is fixedly connected with the screen frame 1.

The first steel wire group 2 comprises at least one steel wire, and the elastic coefficient of the steel wire of the first steel wire group 2 positioned in the middle of the net frame 1 is larger than that of the steel wire of the first steel wire group 2 positioned at the side.

Illustratively, in the case where the first wire group 2 includes only one wire, the spring constant of the wires of the plurality of first wire groups 2 decreases in sequence in the direction from the middle of the frame 1 to the side in the first direction, i.e., the spring constant of each wire varies in the direction from the middle of the frame 1 to one of the sides.

In the case where the first wire group 2 includes two, three or more wires, the elastic coefficients of the plurality of wires in the same first wire group 2 are the same, that is, the elastic coefficients of the plurality of wires included in the plurality of first wire groups 2 are decreased in a gradient manner. In one embodiment, three first wire groups 2 are provided, and the elastic modulus of the wires of the first wire group 2 in the middle is greater than the elastic modulus of the wires of the first wire groups 2 on both sides.

Of course, in other embodiments, a plurality of first steel wire sets 2 including different numbers of steel wires may be provided, for example, the first steel wire set 2 located in the middle of the net frame 1 includes two steel wires, and the first steel wire set 2 located at the side includes four steel wires; when in use, the number of the steel wires of each first steel wire group 2 can be adjusted according to actual needs.

In the printing process, the scraper blade scrapes along a first direction to complete the printing of the pattern on the silicon wafer; the elastic coefficient of the steel wires of the first steel wire group 2 positioned in the middle is larger than that of the steel wires of the first steel wire group 2 positioned at the side, the scraper moves along the first direction in the scraping process of the scraper, the supporting force of the second steel wire group 2 positioned in the middle on the second steel wire group 3 is stronger, and the deformation of the steel wires of the second steel wire group 2 positioned in the middle is reduced; in the process of printing, the deformation degree of the steel wire positioned in the middle of the screen frame 1 and the deformation degree of the steel wire positioned on the side edge are kept the same, namely, the uniform thickness of different parts of the printed graph is ensured, the problems of large thickness and small thickness of part of the printed graph are reduced, and the quality of graph printing is improved.

In another embodiment, referring to fig. 2, the second group of wires 3 comprises at least one wire, and the spring constant of the wires of the second group of wires 3 located in the middle of the frame 1 is greater than the spring constant of the wires of the second group of wires 3 located at the sides.

Illustratively, in the case where the second wire group 3 includes only one wire, the spring constant of the wires of the plurality of second wire groups 3 decreases in sequence in the direction from the middle of the frame 1 to the side in the second direction, i.e., the spring constant of each wire varies in the direction from the middle of the frame 1 to one of the sides.

In the case where the second wire group 3 includes two, three or more wires, the elastic coefficients of the plurality of wires in the same second wire group 3 are the same, that is, the elastic coefficients of the plurality of wires of the plurality of second wire groups 3 decrease in a gradient manner. In one embodiment, three second wire groups 3 are provided, and the elastic modulus of the wires of the second wire group 3 in the middle is larger than the elastic modulus of the wires of the second wire groups 3 on both sides.

Of course, in other embodiments, a plurality of second steel wire groups 3 including different numbers of steel wires may be provided, for example, the second steel wire group 3 located in the middle of the frame 1 includes two steel wires, and the second steel wire group 3 located at the side includes four steel wires; when in use, the number of the steel wires of each second steel wire group 3 can be adjusted according to actual needs.

When the elastic coefficients of the second steel wire groups 3 are different, the scraper scrapes along the second direction, and the supporting force of the second steel wire group 3 in the middle to the steel wires of the first steel wire group 2 is stronger, namely, the printed patterns are uniform.

Referring to fig. 3, in another embodiment, the elastic modulus of the steel wires of the first wire group 2 positioned at the middle of the frame 1 is set to be greater than the elastic modulus of the steel wires of the first wire group 2 positioned at the lateral side, and at the same time, the elastic modulus of the steel wires of the second wire group 3 positioned at the middle of the frame 2 is set to be greater than the elastic modulus of the steel wires of the second wire group 3 positioned at the lateral side. In this case, the scraper may scrape in either the first direction or the second direction.

So, at the in-process of in-service use, more even to the pressure sharing of scraper blade, set up in the steel wire of laying a certain single direction for by the centre to both sides elastic coefficient reduce gradually for the steel wire deflection keeps the same effect better, guarantees promptly that the thickness of the figure of printing keeps even effect better.

In the practical use process, different modes can be adopted for setting different elastic coefficients of the steel wires, and firstly, the elastic coefficient of the steel wires is adjusted by changing the diameter of the steel wires, and the larger the diameter of the steel wires is, the larger the elastic coefficient of the steel wires is.

Under the condition of adjusting its elasticity coefficient through the diameter that changes the steel wire, adjust the interval of many steel wires that first direction and second direction were arranged to guarantee the size maintenance of a plurality of meshs of many steel wire intersection formation, can reduce the inhomogeneous problem of figure that causes the printing because of the mesh size difference, further ensure the quality of the figure of printing.

And secondly, the diameters of the steel wires with different elastic coefficients can be set to be the same, and different materials are selected, so that the elastic coefficients of the steel wires are changed.

It should be clear that, in actual use, the amount of deformation of the wires located in the printing area affects the uniformity of the printed pattern, and therefore, the elastic modulus of the first wire group 2 and the second wire group 3 may be changed, or only the elastic modulus of the wires located in the printing area may be changed, and the function of maintaining the thickness of the printed pattern uniform can also be achieved.

In addition, the printing screen cloth with the plurality of first wire groups 2 and the plurality of second wire groups 3 forming a rectangle is described in the present application, it should be understood that, for convenience of illustration and understanding, in the actual use process, the printing screen cloth can be formed into various shapes such as a circle, a triangle, a pentagon, etc. by adjusting the lengths and angles of the wires or by directly cutting the wires.

To the polyester screen cloth 4 that sets up in first steel wire group 2 and 3 outer lanes of second steel wire group, be for the convenience of making many steel wires in first steel wire group 2 and the second steel wire group 3 form a fixed whole, fixed with net frame 1 again, reduce the problem that the steel wire of first steel wire group 2 and second steel wire group 3 scatters, be convenient for follow-up and net frame 1 fix.

In order to guarantee the firmness of the connection of the polyester screen cloth 4 and the steel wires, the inner ring of the polyester screen cloth 4 is arranged to extend to the inner sides of the outer ring edges of the first steel wire group 2 and the second steel wire group 3, so that the polyester screen cloth 4 and the steel wire parts are crossed to form a composite area 5, and the firmness of the polyester screen cloth 4 and the steel wires is improved.

Referring to fig. 4, in order to fix the outer ring of the polyester mesh 4 with the screen frame 1 and complete the assembly of the printing tool, the screen frame 1 is formed by splicing two sub-frames 11 which are rectangular and annularly arranged, the outer ring of the polyester mesh 4 is clamped between the two sub-frames 11, the two sub-frames 11 are relatively fixed, the polyester mesh 4 is clamped, the fixation of the steel wire and the screen frame 1 is realized, and the installation operation is convenient.

Two sub-frames 11 are fixed through the bolt, and the bolt passes two sub-frames 11 and with two sub-frame 11 threaded connection, and it is comparatively convenient to carry out the operation of fixing to two sub-frames 11, assembles this printing tool promptly, and fixed easy and simple to handle. In other embodiments, the two sub frames 11 may be fixed by various fixing methods such as adhesive fixation, snap fixation, mortise and tenon structure fixation, etc.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on operational states of the present application, and are only used for convenience in describing and simplifying the present application, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise explicitly specified or limited; in addition, a plurality of the references in the present application is two or more. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present application has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and merely illustrative. On the basis of the above, the present application can be subjected to various substitutions and improvements, and the substitutions and the improvements are all within the protection scope of the present application.

Claims (10)

1. A screen printing screen cloth comprises a plurality of first steel wire groups (2) arranged along a first direction and a plurality of second steel wire groups (3) arranged along a second direction; it is characterized in that the preparation method is characterized in that,

the first steel wire group (2) at least comprises one steel wire, and the elastic coefficient of the steel wire of the first steel wire group (2) positioned in the middle of the screen printing screen cloth is larger than that of the steel wire of the first steel wire group (2) positioned on the side edge; and/or the presence of a gas in the atmosphere,

the second steel wire group (3) at least comprises one steel wire, and the elastic coefficient of the steel wire of the second steel wire group (3) positioned in the middle of the screen printing screen cloth is larger than that of the steel wire of the second steel wire group (3) positioned on the side edge.

2. The screen printing mesh cloth according to claim 1, wherein the diameter of the steel wires with large elastic modulus is larger than that of the steel wires with small elastic modulus.

3. The screen printing mesh cloth according to claim 1, characterized in that the diameters of the wires of the first plurality of groups (2) of wires and of the second plurality of groups (3) of wires are all the same.

4. The screen printing mesh cloth according to claim 1, wherein a polyester mesh cloth (4) is peripherally connected to the first steel wire groups (2) and the second steel wire groups (3).

5. A screen printing mesh cloth according to claim 4, characterized in that the inner circle of the polyester mesh cloth (4) extends to the inside of the outer circle edges of the first group of wires (2) and the second group of wires (3);

the polyester mesh cloth (4) is connected with the first steel wire group (2) and the second steel wire group (3) to form a composite area (5).

6. A screen printing mesh according to any one of claims 1 to 5, characterized in that the wires of said first groups (2) and said second groups (3) are crossed to form a plurality of meshes of the same size.

7. A screen printing tool, characterized by comprising a rectangular ring-shaped frame (1) and the screen printing mesh cloth according to any one of claims 1-6 fixedly connected to the inner side of the frame (1).

8. A screen printing tool as claimed in claim 7, wherein the frame (1) comprises two sub-frames (11) arranged in a rectangular ring, the outer circumferential edge of the screen printing cloth being sandwiched between the two sub-frames (11).

9. A screen printing apparatus comprising a screen printing cloth according to any one of claims 1 to 6 or a screen printing tool according to claim 7 or 8;

the screen printing device further comprises a scraping plate which is abutted to the screen printing screen cloth and slides along the first direction or the second direction relative to the screen printing screen cloth.

10. A screen printing apparatus as claimed in claim 9, wherein the squeegee slides in the first direction relative to the screen cloth when the spring constant of the wires of the first wire group (2) located only in the middle of the screen cloth is greater than the spring constant of the wires of the first wire group (2) located at the side;

when the elastic coefficient of the steel wires of the second steel wire group (3) only positioned in the middle of the screen printing screen cloth is larger than that of the steel wires of the second steel wire group (3) positioned on the side edge, the scraper blade slides along the second direction relative to the screen printing screen cloth.

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