KR20110054084A - Fabricating method of screen for printing and a screen for printing using the same - Google Patents

Abstract

PURPOSE: A method for manufacturing a printing screen and the printing screen are provided to reduce cost required for a printing process by forming a metal net without printing patterns. CONSTITUTION: A method for manufacturing a printing screen includes the following: A photo-resist is coated at one side of a master mold(S10). The photo-resist is exposed using a photo-mask on which dot shapes are formed(S20). A part of the photo-resist on which the dot shapes are arranged is hardened. The remained photo-resist is etched(S30). Enchant is poured to the etched photo resist in order to etch the master mold(S40). Non-etched photo-resist is developed(S50). A metal net is formed using a plating solution(S60). The metal net is separated from the master mold(S70).

Description

TECHNICAL FIELD OF THE INVENTION A screen for manufacturing a trial screen and a screen for trial manufactured using the same.

The present invention relates to a trial screen manufacturing method and a trial screen manufactured using the same, and to a trial screen manufacturing method for printing a character or shape on the surface of the instrument such as an injection molding, and a trial screen manufactured using the same. .

Today, silk screen printing is mainly used as a technique for printing letters or patterns on resins such as injection moldings.

In general, the silk screen printing technique covers a film engraved in a woven mesh shape on a woven mesh screen, adheres to the object to be printed, and rubs the film by applying an emulsion to the film. It is a technique of printing letters or patterns by passing an emulsion only on the screen.

On the other hand, in order to form a high-resolution characters, unlike the method of using the woven mesh-shaped silk screen, after forming a grid-shaped printing shape on a very thin metal mesh and closely contacting the metal mesh to the print object, It is a technique of printing letters or patterns by printing ink coating on the metal mesh.

However, the above-described method using the metal mesh has a problem in that the grid pattern of the printed pattern is poor in durability and thus cannot be used for a long time.

In addition, the method using the metal mesh is very disadvantageous to form a fine gradation (gradation) because the printing pattern is determined by forming a grid-shaped printing pattern.

In addition, the method using the metal mesh is used in a state in which the printed form of the letter is imprinted, it is necessary to manufacture a new metal mesh when it is necessary to print new characters. Such metal meshes cost 10 million won when the manufacturing cost is 40cm × 40cm in length and width, and thus a lot of manufacturing costs are consumed.

The technical problem of the present invention is to provide a trial screen manufacturing method for improving the durability of the metal mesh used for high quality printing and a trial screen manufactured using the same.

Another technical problem of the present invention is to provide a trial screen manufacturing method for manufacturing a metal mesh that can be used without forming a printing shape on the metal mesh and a trial screen manufactured using the same.

Screen for producing a trial screen of the present invention for achieving the above technical problem is a photo resist coating step of coating a photo resist on one side of the master mold; A photoresist exposing step of exposing the photoresist with a photomask in which a plurality of point shapes are formed such that the photoresist is cured into a plurality of point shapes; A photoresist etching step of etching photoresists other than the portions cured into the plurality of point shapes by pouring an etchant into the exposed photoresist; A master mold etching step of corroding the master mold by pouring a corrosion solution into an etched photoresist such that the plurality of dot shapes are formed in a protrusion shape on the master mold; A photoresist developing step of developing the photoresist remaining on the protrusions formed in the master mold; A electroplating step of forming a metal network by pouring a plating solution so that the nickel liquid does not exceed the protrusions formed in the master mold and performing electroplating to fix the plating solution; And a metal net separation step of separating the fixed metal net from the master mold. And is formed to include a plurality of protrusions.

In this case, it is preferable that a hole is formed in the metal net separated in the metal net separation step, the diameter of the hole is 10 μm to 20 μm, and the pitch interval between the centers of the hole is 25 μm to 35 μm.

In the screen for manufacturing trial screen, it is preferable to form the thickness of the metal mesh between 60% and 170% of the hole diameter.

On the other hand, the trial screen manufactured by using the trial screen manufacturing method for achieving the above technical problem is formed of a plurality of holes are arranged in a regular order, formed of a material of nickel, the diameter of the hole is formed of 10μm to 20μm, It is characterized in that the pitch interval between the center of the hole is formed from 25μm to 35μm.

In this case, the thickness of the metal mesh is preferably formed between 60% and 170% of the hole diameter.

In addition, the metal mesh is an emulsion applied to the fine holes in addition to the printing area so that the printing area of the letter or pattern consists of the plurality of holes; It may be formed to include more.

According to the present invention, since circular fine holes are formed in the metal mesh and a part of the fine holes is blocked with an emulsion to form a print area, unlike the conventional metal grid of a grid pattern, durability is much improved.

In addition, since the present invention forms a circular fine hole in the metal mesh, and forms a printing area by blocking a portion of the fine hole with an emulsion, the manufacturing cost is lowered to the level of 1/10 of the conventional, thereby greatly reducing the manufacturing cost have.

In addition, the present invention can be recycled because it is possible to expose and develop the emulsion formed in the metal mesh when forming another type of printing area and to re-apply the oil so that another printing area is formed so that the other printing area can be recycled. There is an effect to further reduce the cost of printing manufacturing.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention;

First, each process of forming the trial screen manufacturing method according to an embodiment of the present invention will be described.

1 is a flowchart of a trial screen manufacturing method according to an embodiment of the present invention. 2 to 8 are flowcharts for each process of the trial screen manufacturing method shown in FIG. 2 to 8 show partial cross-sectional views of the trial screen manufacturing method shown in FIG. 1. 9 is a partial perspective view of a trial screen manufactured using the trial screen manufacturing method of FIG. 1.

As shown in FIG. 1, the screen for manufacturing a trial screen according to an embodiment of the present invention includes a photoresist coating step (S1), a photoresist exposure step (S2), a photoresist etching step (S3), and a master mold etching step. (S4), a photoresist developing step (S5), electroplating plating step (S6), and metal mesh separation step (S7) is formed.

As shown in FIG. 2, the photoresist coating step S1 is a step of coating the photoresist 2 on one surface of the master mold 1. In the present embodiment, the master mold 1 has a thickness of about 10 mm, and in this case, the thickness of the photoresist 2 applied to one surface of the master mold 1 is about 1 μm.

In the photoresist exposing step S2, as shown in FIG. 3, light is applied to the photomask 2b in which the plurality of point-shaped light transmitting regions 2b1 are formed so that the photoresist 2 is cured into a plurality of point shapes. It transmits and exposes the photoresist 2. Here, the photomask 2b is a form in which the several light-transmitting area | region 2b1 was formed on the insulating film. Therefore, the light passing through the photomask passes through only a plurality of dot-shaped transmissive regions during exposure.

As shown in FIG. 4, the photoresist etching step (S3) is a step of etching the photoresist 2 other than a portion cured into a plurality of spots by pouring an etchant into the exposed photoresist 2. Then, the regions other than the plurality of dot shapes are etched in the photoresist 2 to form a plurality of dot-shaped protrusions.

In the master mold etching step (S4), as shown in FIG. 5, a corrosion solution is poured into a photoresist 2 etched such that a plurality of dot shapes are formed in the form of protrusions 1a in the master mold 1. To corrode. Therefore, in the master die 1, regions other than the point shapes of the photoresist 2 are corroded, and the point portions are formed by the fine protrusions 1a. The fine protrusions 1a formed in this case are formed in a cylindrical shape and have a diameter D1 of 15 µm and a length of about 25 µm. In addition, the fine protrusions 1a are formed by regular alignment so that the pitch interval P1 between the centers corresponds to about 30 μm.

In the photoresist developing step (S5), as shown in FIG. 6, a developer is poured into the master mold 1 to develop the photoresist 2 remaining on the protrusion 1a of the master mold 1. This is a step of removing the remaining photoresist 2.

In the electroplating step (S6), as shown in FIG. 7, the metal solution is poured into the metal mold so as not to exceed the protrusions 1a formed in the master mold 1, and the electroplating is performed to fix the metal solution to the metal mesh 3. Forming a step. In the case of this embodiment, the metal liquid is formed of a nickel liquid. In addition, the metal liquid is not limited to the material exemplified in the present embodiment and may be formed of a material which is easy to change phase from a liquid state to a solid state such as nickel liquid when electroplating is performed.

As shown in FIG. 8, the metal mesh separating step S7 is a step of separating the metal mesh 3 of the nickel material fixed from the master mold 1.

The metal screen 3, which is a trial screen manufactured by the trial screen manufacturing method according to an embodiment of the present invention as described above, is formed with a plurality of holes 3a, as shown in FIG. The diameter D1 is about 15 μm, and holes are formed in which the center pitch interval P1 of the holes is regularly arranged at about 30 μm. In this case, the metal mesh 3 is formed in about 20 micrometers in thickness.

In the present embodiment, the diameter (D1) of the hole formed in the metal mesh 3 is described as about 15μm, the diameter (D1) of the hole is preferably formed of 10μm to 20μm. In this case, when the diameter D1 of the hole is smaller than 10 μm, ink may not penetrate well, and the printing shape may be blurred. When the diameter D1 of the hole is larger than 20 μm, the ink may overlap and bleed. In addition, in the present embodiment, the pitch spacing P1 between centers is exemplified by 30 μm in the plurality of holes 3a, but the pitch spacing P1 between centers is preferably 25 μm to 35 μm. . When the plurality of holes 3a are formed to have a pitch interval P1 between centers smaller than 25 μm, the ink may overlap and spread, and the plurality of holes 3a may have a pitch interval P1 of 35 μm between the centers. When formed larger, a phenomenon may occur in which ink may be spilled.

In addition, in the present embodiment, the thickness of the metal mesh 3 is illustrated as about 20 μm, the thickness DT1 of the metal mesh 3 is preferably formed to a thickness between 60% and 170% of the hole diameter D1. Do. In this case, when the thickness DT1 of the metal mesh 3 is smaller than 60% of the hole diameter D1, the durability may be weak and cracks may occur, and the thickness DT1 of the metal mesh 3 may be reduced. When is formed larger than 170% of the hole diameter (D1) is a long path of the hole is not good injection of ink into the hole may cause a printing failure.

Hereinafter, a trial screen manufacturing method and a screen printing method using a metal mesh 3 using the trial screen according to an embodiment of the present invention will be described.

First, the metal mesh 3 manufactured by the trial screen manufacturing method according to the embodiment of the present invention described above is formed with a hole 3a, in which case the hole 3a has a diameter D1 of about 15 μm. The center pitch intervals P1 of (3a) are formed in a form of regular alignment of about 30 μm.

This metal mesh 3 is used as a substitute for the trial silk screen. In FIGS. 10 and 11, a process of forming a printing layer on the surface of the injection molding 5 using the metal mesh 3 is illustrated.

FIG. 10 is a partial perspective view of a metal mesh 3 in a state where a photosensitive liquid emulsion 4 is coated on a surface of an injection molded object 5 in order to print text on the surface of the injection molded product 5. . FIG. 11 is a partial perspective view of a printing area after the printing is finished on the injection molded product 5 shown in FIG. 10.

First, as shown in FIG. 10, in order to print a character on the surface of the injection molded object 5 to be printed, a fine film is applied to the metal mesh 3 by applying an emulsion 4, which is a photosensitive liquid, in addition to a portion where a print area such as a character is formed. The hole 3a is blocked. In the case of this embodiment, the printing area formed in the metal mesh 3 is in the shape of the letter 3b of "a".

In order to print in the form of the above-described print area, a scrubber (not shown) in which the ink coating is applied to the shape of the letter 3b of the letter 'b' while the metal mesh 3 is in close contact with the surface of the injection molded product 5. When rubbed, the ink paint passing through the letter '3' of the letter 'b' is printed in the image of the letter 'c' of the letter 'c' on the surface of the injection molding 5, as shown in FIG. do.

In this case, when the shape of the letter '3' of the letter 'a' is enlarged on the surface of the injection molded product 5, the diameter D1 is composed of points 3d having a diameter D1 of approximately 15 μm and a center pitch interval P1 of approximately 30 μm. have. At this time, the resolution is 800 dpi to form excellent print quality.

If it is desired to print in a different letter form, the emulsion 4 is exposed to the oil 4 of the metal mesh 3, the oil 4 is developed and removed, and then, in addition to another printing area having a shape to be printed, By applying 4), the fine holes 3a are again blocked, whereby printing can be performed in a different shape.

As described above, the trial screen manufacturing method according to an embodiment of the present invention and the metal mesh 3 manufactured by using the metal mesh 3 are not a method of engraving letters into the metal mesh 3 as in the related art. After forming a plurality of fine holes (3a) in the form is formed in such a way that the fine holes (3a) in addition to the printing area is blocked by the oil agent (4), it is possible to print in high resolution.

In this case, the metal mesh 3 is composed of circular fine holes 3a, and unlike the conventional metal mesh 3 of the conventional grid pattern, the durability is greatly improved and can be used almost permanently.

In addition, the conventional metal mesh 3 has a manufacturing cost of about 10 million won in the case of the size of about 40cm X 40cm of the vertical to horizontal, the metal mesh 3 according to an embodiment of the present invention is a vertical When the size of about 40cm x 40cm size is about 1 million won, which is the level of 1/10 of the conventional, the printing cost is greatly reduced.

In addition, the metal mesh 3 according to an embodiment of the present invention may expose and develop an oil agent 4 forming a print area, and then may form another print area with the oil agent 4 to print in a different shape. have. That is, unlike the metal mesh 3 which can only print with only one printing area as in the prior art, the metal mesh 3 exposes and develops the oil agent 4, and reapplies the oil agent 4 to apply another printing area. You can do it, so you can recycle it. Therefore, by using the metal mesh 3 according to an embodiment of the present invention, it is possible to further reduce the printing manufacturing cost.

In addition, the master mold (1) according to an embodiment of the present invention can be manufactured and stored for each size of the metal mesh (3), and can be used to manufacture only the metal mesh (3) in the master mold (1) as needed. Therefore, the manufacturing process is very simple and the manufacturing cost is reduced.

1 is a flow chart of a trial screen manufacturing method according to an embodiment of the present invention.

2 to 8 are flowcharts for each process of the trial screen manufacturing method shown in FIG.

FIG. 9 is a partial perspective view of a trial screen made using the trial screen manufacturing method of FIG. 1. FIG.

FIG. 10 is a partial perspective view of a metal network in which a photoresist emulsion is coated on a surface of an injection target to be printed in order to print text on the surface of the injection target.

FIG. 11 is a partial perspective view of a printing area after finishing printing on the injection molded product shown in FIG. 10; FIG.

<Explanation of symbols for the main parts of the drawings>

One ; Master mold 2; Photoresist

3; Metal mesh 4; emulsion

5; Injection

Claims (6)

A photoresist coating step of coating a photoresist on one surface of the master mold; A photoresist exposing step of exposing the photoresist with a photomask in which a plurality of point shapes are formed such that the photoresist is cured into a plurality of point shapes; A photoresist etching step of etching photoresists other than the portions cured into the plurality of point shapes by pouring an etchant into the exposed photoresist; A master mold etching step of corroding the master mold by pouring a corrosion solution into an etched photoresist such that the plurality of dot shapes are formed in a protrusion shape on the master mold; A photoresist developing step of developing the photoresist remaining on the protrusions formed in the master mold; A electroplating step of forming a metal network by pouring a plating solution so that the nickel liquid does not exceed the protrusions formed in the master mold and performing electroplating to fix the plating solution; And A metal net separation step of separating the fixed metal net from the master mold; Screen for producing a trial screen, characterized in that it comprises a. The method of claim 1, Forming a hole in the metal network separated in the metal network separation step, the screen of the trial characterized in that the diameter of the hole to form a 10μm to 20μm, the pitch interval between the center of the hole to form a 25μm to 35μm Way. The method of claim 2, And the thickness of the metal mesh is formed between 60% and 170% of the hole diameter. A plurality of holes are formed in a regular array, formed of a nickel material, the diameter of the hole is 10μm to 20μm, the pitch screen between the center of the hole is characterized in that the 25μm to 35μm formed. The method of claim 4, wherein And the thickness of the metal mesh is formed between 60% and 170% of the hole diameter. The method of claim 4, wherein The metal mesh is an emulsion applied to the fine holes in addition to the printing area so that the printing area of the letter or pattern consists of the plurality of holes; A trial screen, characterized in that it further comprises.

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