JP2019107858A - Metal mask for screen printing with plate frame and manufacturing method therefor - Google Patents

Abstract

To provide a metal mask for screen printing with a plate frame capable of shortening delivery time from receiving an order to product shipment, and to provide a manufacturing method therefor.SOLUTION: A plate frame 1, a gauze 2 gauze stretched in the plate frame, and a metal mask 3 of which an outer peripheral edge is attached to the gauze by an adhesive, and of which a pattern opening 6 is pore opening processed by a laser process in a center pattern area are equipped, the metal mask has an electrolytic polishing possible area 10 in which burr of edge of the pattern opening is removed by impregnating only the pattern opening which is pore opening processed by the laser process and neighboring thereof in an electrolytic polishing liquid 7, and an electrolytic polishing impossible area 11 in which an outer periphery part region of the metal mask positioned at an outer periphery part of the electrolytic polishing possible area is not impregnated into the electrolytic polishing liquid, and sheet thickness of the electrolytic polishing impossible area is thicker than sheet thickness of the electrolytic polishing possible area.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a metal mask for screen printing with a frame that can shorten the delivery period from receiving an order to shipping the product and a method of manufacturing the same.

Conventionally, a plate-frame-attached metal mask for screen printing is manufactured, for example, by a manufacturing method as shown in FIG. When an order is received from a customer (step S11), the pattern opening is drilled by laser processing in a state of only a metal mask made of SUS material (laser processing step: step S12). In the reference example, it takes about 44 minutes in total for laser processing data creation time, processing set time, pattern processing time, metal cutting time, pattern inspection time and the like. Next, the metal mask obtained by laser processing is subjected to an electrolytic polishing process to remove burrs on the edge of the pattern opening (electrolytic polishing step: step S13). In the reference example, it takes about 12 minutes in total for the electropolishing set time, the processing time, the cleaning time and the like. Finally, a wedge is attached to the plate frame, and the outer peripheral edge of the metal mask that has been subjected to the electrolytic polishing treatment is attached to this wedge using an adhesive, and then the inner wedge other than the bonded part is cut off (flapping step: Step S14). In the reference example, about 50 minutes are required for the measurement time, the finishing time, and the like. Then, the completed metal mask for screen printing with a frame is shipped to the customer (step S15). It takes about six minutes for shipping inspection, packing time, etc. That is, in the reference example, it takes about 2 hours in total production time per version, for example, from receipt of an order from a customer to product shipment.
Also, as the prior art in the prior art, a metal plate such as a thin square stainless steel plate (SUS 304 plate) is epoxy-based adhesive or the like on a screen frame which is tensioned while applying tension to the mesh screen first. After bonding and curing the adhesive, the screen creases of unnecessary portions overlapping the metal plate are cut off (coating step). Next, a mask for screen printing is set in a laser processing machine, laser light is irradiated to the metal plate, a large number of pores are perforated at a predetermined position of the metal plate, and a required pattern image is formed (laser processing step ). Finally, the surface on the laser light emission side of the metal plate on which the pattern image of the pores is formed is planarly polished with an abrasive of about # 1500 to remove the dross around the aperture of the pore (buffing process) Patent Document 1 discloses a screen printing metas mask which can be obtained through the above) and a method for producing the same.

Unexamined-Japanese-Patent No. 9-248976 (Paragraph 0014-0016)

In the conventional method for manufacturing a metal mask for screen printing with a plate frame, preparation is started upon receipt of an order from a customer (step S11), and a laser processing step (step S12) and an electropolishing step (step S12). The product is shipped to the customer (step S15) through the three operation steps of step S13) and the tensioning step (step S14). Therefore, there has been a limit to shortening the delivery period from receiving an order to product shipment.
In the prior art described in the prior art document, in the final buffing step, the surface on the laser light emitting side of the metal plate is planarly polished with an abrasive of about # 1500, and the periphery of the pore opening is The surface on the laser beam incident side of the metal plate and the inner wall surface of the pores remained unpolished because they only removed the dross present in the above.

  The present invention has been made to solve the problems as described above, and provides a metal mask for screen printing with a frame that can shorten the delivery period from receiving an order to shipping the product and a method of manufacturing the same. is there.

  In the metal mask for screen printing with a screen frame according to the present invention, the outer peripheral edge portion is attached to the plate frame, the ridge lined to the plate frame and the ridge by an adhesive, and the laser processing is performed in the central pattern area. The metal mask is formed by drilling the pattern opening, and the metal mask is immersed in the electropolishing liquid only in the pattern opening drilled by laser processing and in the vicinity of the periphery of the pattern opening. The outer peripheral area of the metal mask located on the outer peripheral portion of the electropolable area, which is an electropolable area for removing burrs, is an electropolished non-permanent area not immersed in the electropolishing liquid, Is made thicker than the plate thickness of the electro-polishable area.

  In addition, the electrolytically polishable area to be immersed in the electrolytic polishing solution of the metal mask is made rectangular, and the electrolytic non-polishable area not to be immersed in the electrolytic polishing solution is made rectangular frame.

  In addition, the metal mask can be chemically polished by removing burrs at the edge of the pattern opening by immersing only the pattern opening drilled by laser processing and the vicinity thereof in a chemical polishing solution and chemically polishing it by a chemical reaction. The outer peripheral area of the metal mask, which is an area and located on the periphery of the chemical polishable area, is a non-chemical polishable area that is not chemically polished by the chemical reaction of the chemical polishing solution, and the plate thickness of the chemical polish non-possible area is chemical polished It is thicker than the thickness of the possible area.

  Further, the chemical polishing area to be immersed in the chemical polishing liquid of the metal mask is rectangular, and the chemical polishing non-permissible area which is not chemically polished by the chemical reaction of the chemical polishing liquid is rectangular frame.

  Further, in the method of manufacturing a metal mask for screen printing with a frame according to the present invention, before receiving an order, a crease is attached to the plate, and the outer periphery of the unprocessed metal mask is attached with an adhesive. A preliminary step of preparing an original plate for a metal mask for screen printing and a laser processing within the central pattern area of the unprocessed metal mask in a state where it is tacked to a plate frame after receiving an order In the laser processing step of drilling the pattern opening, and in the electrolytic bath containing the electrolytic polishing solution, only the pattern opening of the metal mask on which the laser processing has been completed and the vicinity thereof are immersed. And an electropolishing step of electropolishing only the pattern opening and the vicinity thereof.

  In addition, the electrolytic cell used in the electrolytic polishing step is normally divided into two divided structures, and in the case of the electrolytic polishing step, only the pattern opening of the metal mask on which the laser processing has been completed and the vicinity thereof is divided into two parts. The electrolytic solution is circulated in the electrolytic cell by being sandwiched from both sides by the tank.

  In addition, the electrolytic cell of the two-divided structure is provided with an annular seal for liquid leakage prevention at the peripheral portion of the opening that is in contact with the vicinity of the periphery of the pattern opening of the metal mask.

  Further, only the pattern opening of the metal mask after laser processing and the vicinity thereof are immersed in a chemical bath containing a chemical polishing solution, and chemical polishing is performed by a chemical reaction. And D. a chemical polishing step of chemically polishing only the vicinity of the periphery.

  According to the present invention, there is an effect that it is possible to obtain a metal mask for screen printing with a frame which can shorten the delivery period from receipt of an order from a customer to product shipment. Further, since the outer peripheral edge portion of the metal mask located on the outer side in the vicinity of the periphery of the pattern opening which is not immersed in the electrolytic polishing liquid is not electropolished, the thickness of the outer peripheral edge portion does not become thin. Moreover, since the outer peripheral portion is a frame-like peripheral portion, there is also an effect that the strength can be kept strong.

It is a flowchart which shows the manufacturing method of the metal mask for screen printing with a version frame in Example 1 of this invention to process order. It is sectional drawing which shows the covering process of the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention. It is sectional drawing which shows the laser processing process of the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention. It is a top view which shows an example of the screen version by which laser processing is carried out after the completion of the covering process of the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention. It is a top view which shows the other example of the screen plate laser-processed after completion | finish of the covering process of the manufacturing method of the metal mask for screen printing with a frame in Example 1 of this invention. It is sectional drawing which shows the general | schematic structure of the electropolishing process of the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention. It is a disassembled perspective view which shows the electropolishing process of the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention. It is a top view which shows the plate | board thickness measurement location of the metal mask after the completion of the electropolishing process of the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention. It is a table | surface which shows the measurement result of the plate thickness measurement location of the metal mask after the completion of the electropolishing process of the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention. It is a table | surface which shows plate thickness fluctuation value from the measurement result of the plate thickness measurement location of the metal mask after the completion of the electropolishing process of the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention. It is explanatory drawing which compares and shows the shift | offset | difference of the opening coordinate in the manufacturing method of the metal mask for screen printing with a plate frame in Example 1 of this invention, and the manufacturing method of the conventional metal mask for screen printing with a frame. It is a flowchart which shows the manufacturing method of the conventional metal mask for screen printing with a frame in order of a process.

Example 1
FIG. 1 is a flowchart showing a method of manufacturing a metal mask for screen printing with a screen frame in the embodiment 1 of the present invention in the order of steps.
First, before receiving an order from a customer, a weir was attached to the plate frame, and the outer peripheral edge of the cut raw metal mask was attached using an adhesive, and then the internal weir except the bonded part was cut off A screen framed metal mask for screen printing is prepared in advance (pre-stretching step: step S1). In this embodiment, for example, about 48 minutes such as metal cutting out time and finishing time are prepared before receiving an order. Next, after receiving an order from a customer (step S2), the pattern opening is drilled by laser processing on a metal mask in a state where it is covered with a plate frame (laser processing step: step S3). In this embodiment, for example, it takes about 42 minutes in total for preparation time of laser processing data, processing set time, pattern processing time, pattern inspection time and the like. Finally, in the electrolytic bath containing the electrolytic polishing solution, only a part of the metal mask for which the laser processing has been completed, that is, only the pattern opening and the vicinity thereof is immersed in the electrolytic polishing solution. Electrolytic polishing is performed only in the vicinity of the periphery. Thereby, the burrs at the edge of the pattern opening are removed, and only the vicinity of the periphery of the pattern opening is electropolished (electropolishing step: step S4). In this embodiment, for example, it takes about 11 minutes in total for the electropolishing set time, the processing time, the cleaning time, and the like. Then, the completed metal mask for screen printing with a frame is shipped to the customer (step S5). It takes about 11 minutes for measuring time, shipping inspection, packing time, etc. Including the preparation time, it takes about 2 hours of total production time per equivalent edition. However, in this embodiment, about 48 minutes such as metal cutting time and finishing time are already prepared before receiving an order from a customer, so the delivery time from receiving an order from the customer to shipping the product is shortened. can do. In addition, since the normal delivery period is shipped after all the items are assembled, the larger the number of orders from the customer increases, the more the number increases from several tens of editions to hundreds of editions, thousands of editions, etc. It is.
As described above, according to the present invention, prior to receiving an order from a customer, an original plate of a screen printing metal mask for screen printing with a blank frame is prepared in advance, in which a raw metal mask is tacked on the printing frame. The tensioning process has the first feature. Also, after receiving the customer's order, the two working processes of the laser processing step of step S3 and the electropolishing step of step S4 are sequentially performed based on the customer specification, but here, step S4 Has the second feature. In the electrolytic bath containing the electropolishing liquid, only part of the metal mask, that is, the pattern opening and the vicinity thereof, is immersed in the electropolishing liquid, and only the pattern opening and the vicinity thereof It means electropolishing. Thereby, the burrs at the edge of the pattern opening are removed, and only the vicinity of the periphery of the pattern opening is electropolished.

FIG. 2 is a cross-sectional view showing a plating step of the method for producing a metal mask for screen printing with a frame in accordance with the first embodiment of the present invention.
In FIG. 2, before receiving an order from a customer, a plate 2 is attached to a plate frame 1, and the outer peripheral edge of a metal mask 3 made of a non-processed stainless steel plate (SUS304 plate) is attached using an adhesive. After that, an original plate 4 of a metal mask for screen printing with a screen frame is prepared in advance, from which an internal crease other than the bonded portion is cut off (pre-bleaching step: step S1).

FIG. 3 is a cross-sectional view showing a laser processing step of the method for manufacturing a metal mask for screen printing with a screen frame in Embodiment 1 of the present invention.
In FIG. 3, the customer is ordered and the preparation of the metal mask for screen printing with a frame is started from here, but the original plate of the metal mask for a screen printing with a frame which has already been finished the tacking process Since 4 is prepared beforehand, this will be utilized. The pattern opening 6 is drilled in the metal mask 3 by the laser beam 5 of the laser beam machine.

FIG. 4 is a plan view showing an example of a screen plate to be laser-processed after completion of a plating step of a method for producing a metal mask for a screen frame with a screen frame in Embodiment 1 of the present invention. It is a top view which shows the other example of a version.
An example of the screen plate shown in FIG. 4 is, for example, the frame size of the plate frame 1 is 650 mm × 550 mm or 600 mm × 550 mm, the dimension of the metal mask 3 is 500 mm × 450 mm, and the dimension of the electropolable area 10 of the metal mask 3 is 360 mm × 310 mm, metal plate thickness is 0.08 to 0.15 mm. Further, another example of the screen plate shown in FIG. 5 is, for example, that the frame size of the plate frame 1 is 750 mm × 650 mm or 736 mm × 736 mm, the size of the metal mask 3 is 620 mm × 520 mm, and the electropolatable area 10 of the metal mask 3 is 480 mm. X 380 mm, metal plate thickness is 0.08 to 0.15 mm.

FIG. 6 is a cross-sectional view showing a schematic structure of an electropolishing step of a method of manufacturing a metal mask for screen printing with a frame in Example 1 of the present invention, and FIG. 7 is an exploded perspective view showing the electropolishing step.
6 and 7, in the electrolytic bath 8 containing the electrolytic polishing liquid 7, only a part of the metal mask 3 after the laser processing step is completed, that is, only the pattern opening 6 and the vicinity thereof are immersed in the electrolytic polishing liquid 7. The electrolytic cell 8 has a two-part structure of 8A and 8B so that a sealed state of the liquid sealing material 9 for preventing liquid leakage is provided around the opening of each of the electrolytic cells 8A and 8B. It is provided. The electrolytic cells 8A and 8B of the two-divided structure are usually separated. Then, in the electrolytic polishing step, only a part of the metal mask 3 after the laser processing step, that is, the pattern opening 6 and the vicinity thereof is sandwiched from both sides by the electrolytic cells 8A and 8B of the two division structure. At this time, since the annular seal member 9 for liquid leakage prevention is provided at the periphery of the opening of each of the electrolytic cells 8A and 8B, the annular seal member 9 for liquid leakage prevention is the metal mask 3. Since it closely adheres to the vicinity of the periphery of the pattern opening 6, there is no possibility that the electrolytic polishing liquid 7 leaks. Here, the fact that only part of the metal mask 3, that is, the pattern opening 6 and the vicinity thereof is to be immersed in the electrolytic polishing liquid 7 means that the rectangular shape of the metal mask 3 in FIGS. This means that only the electropolishable area 10 is immersed in the electropolishing liquid 7. In FIG. 4 and FIG. 5, the outer peripheral area of the rectangular frame shape of the metal mask 3 located at the outer peripheral part of the rectangular electro-polatable area 10 is the non-electro-polable non-electrolytic area 11. Thereby, burrs on the edge of the pattern opening 6 are removed, and only the vicinity of the periphery of the pattern opening 6 is electropolished.

FIG. 8 is a plan view showing the plate thickness measurement points of the metal mask after the end of the electropolishing step in the method of manufacturing a metal mask for a screen frame with screen frame in Example 1 of the present invention. FIG. 10 is a table showing measurement results of plate thickness measurement points of a mask, and FIG. 10 is a table showing plate thickness fluctuation values from measurement results of plate thickness measurement points of a metal mask after the end of the electropolishing process.
In FIG. 8, measurement points 1 to 13 are in the rectangular electro-abrasable area 10 of the metal mask 3, and measurement points 14 to 21 are on the outer peripheral portion of the rectangular electro-polishable area 10. It is located in the rectangular frame-like outer peripheral edge region of the metal mask 3 located, that is, in the non-electrolytic-polishing-not-possible area 11 which is not electropolished. As is clear from FIG. 9, the plate thickness after the electropolishing time of 240 seconds at the measurement points 1 to 13 is 0.148 to 0.149 mm, and the electropolishing process at the measurement points 14 to 21 is The plate thickness after 240 seconds was 0.152 to 0.153 mm. And as shown in FIG. 10, the plate thickness fluctuation value which the difference of the plate thickness by electrolytic polishing process compared was 0.003-0.004 mm.
Thus, the rectangular frame-shaped outer peripheral edge region of the metal mask 3 located on the outer peripheral portion of the rectangular electropolable area 10, that is, the plate thickness of the nonelectrolytic nonpolable area 11 is the electropolable area 10 The thickness of the metal mask 3 is about 0.003 to 0.004 mm thicker than the thickness of the metal mask 3. Therefore, the strength of the metal mask 3 can be improved in combination with the rectangular frame shape.

FIG. 11 is an explanatory view comparing the deviation of the aperture coordinates in the method of manufacturing a screen framed metal mask for a screen frame and the conventional method of manufacturing a screen framed metal mask for a screen frame in Example 1 of the present invention.
In FIG. 11, the triangle indicates the coordinates of the design value, the circle indicates the coordinates of the process of the present invention, and the x indicates the coordinates of the conventional standard process. . The specification of the metal mask 3 is 400 mm × 300 mm, opening diameter: 0.5 mm, interval: 50 mm, plate thickness: 0.15 mm, tension: 25 N / cm.
According to the aperture coordinate deviation comparison, the difference between the conventional standard processing and the design value was +20 μm at the maximum, but according to the processing of the present invention, the difference with the design value is suppressed to -5 μm at maximum I was able to.

Example 2
In the first embodiment, the plate-framed screen printing metal mask of the present invention is completed by performing the electropolishing step of step S4 after the laser processing step of step S3. After the laser processing step of step S3, instead of the electropolishing step of step S4, a portion of the metal mask for which laser processing has been completed, ie, the pattern opening and the periphery thereof, in a chemical bath containing a chemical polishing solution. Only the vicinity is immersed in the chemical polishing solution and chemically polished by a chemical reaction, and only the pattern opening and the vicinity thereof are chemically polished. Thereby, burrs at the edge of the pattern opening are removed, and only the vicinity of the periphery of the pattern opening is chemically polished (chemical polishing process). In this chemical polishing process, the electropolishable area 10 of the metal mask 3 in FIGS. 4 and 5 is a chemically polishable area, and the nonelectrolytic polishing area 11 is a nonchemically polishable area. Then, for example, a protective sheet, a protective tape, or the like is coated on the surface of the non-chemically polishing possible area so as not to be chemically polished by the chemical reaction of the chemical polishing solution, and the protective sheet, protective tape, etc. is peeled off after the chemical polishing process is completed. Just do it.

  Even in the case of the second embodiment, there is an effect that it is possible to obtain a metal mask for screen printing with a frame which can shorten the delivery period from the receipt of an order from a customer to the product shipment. In addition, since the outer peripheral edge of the metal mask located further outside in the vicinity of the periphery of the pattern opening which is not immersed in the chemical polishing liquid is not chemically polished, the thickness of the outer peripheral edge does not become thin. Moreover, since the outer peripheral portion is a frame-like peripheral portion, there is also an effect that the strength can be kept strong.

DESCRIPTION OF SYMBOLS 1 plate frame 2 原 3 metal mask 4 plate mask original plate for metal mask for screen printing 5 laser light 6 pattern opening 7 electrolytic polishing solution 8, 8 A, 8 B electrolytic bath 9 sealing material for liquid leakage prevention 10 electrolytically polishable area 11 Electrolytic polishing impossible area

Claims (9)

Print frame,
The fence that is lined with the plate frame,
And a metal mask having an outer peripheral edge attached to the crucible with an adhesive, and a pattern opening formed by laser processing in a central pattern area.
The metal mask is an electrolytically polishable area in which only the pattern opening which has been drilled by laser processing and the vicinity thereof are immersed in the electrolytic polishing solution to remove burrs at the edge of the pattern opening,
An outer peripheral area of the metal mask located on an outer peripheral portion of the electro-polable area is an electro-polable non-permanent area which is not immersed in the electro-polishing liquid,
A plate-frame-attached metal mask for screen printing characterized in that a plate thickness of the non-electrolytic-polish area is made thicker than a plate thickness of the electro-polishable area.   The plate frame according to claim 1, characterized in that the electropolable area immersed in the electropolishing liquid of the metal mask is rectangular, and the electropolished non-immersed area not immersed in the electropolishing liquid is rectangular frame-shaped. Screen printing metal mask. Print frame,
The fence that is lined with the plate frame,
And a metal mask having an outer peripheral edge attached to the crucible with an adhesive, and a pattern opening formed by laser processing in a central pattern area.
The metal mask is a chemical polishing area in which only the pattern opening drilled by laser processing and the vicinity thereof are immersed in a chemical polishing solution and chemically polished by a chemical reaction to remove burrs on the edge of the pattern opening. ,
An outer peripheral area of the metal mask located at an outer peripheral portion of the chemical polishing area is a non-chemical polishing area which is not chemically polished by a chemical reaction of a chemical polishing solution,
A metal mask for screen printing with a frame, characterized in that the thickness of the non-chemically-polished area is larger than the thickness of the chemically-polished area.   4. The method according to claim 3, wherein the chemical polishing area to be immersed in the chemical polishing solution of the metal mask is rectangular, and the chemical polishing non-permissible area not to be chemically polished by the chemical reaction of the chemical polishing solution is rectangular frame. Plate mask with screen printing metal mask. Prior to receiving an order, a tacking step is performed by preparing in advance an original plate for a screen mask with a screen frame having a frame attached to the plate frame and an outer peripheral edge of an unprocessed metal mask attached by an adhesive. ,
A laser processing step of drilling a pattern opening by laser processing in a central pattern area of the unprocessed metal mask in a state of being tucked to the plate frame after receiving an order;
In the electrolytic bath containing the electrolytic polishing solution, only the pattern opening of the metal mask after laser processing and the vicinity thereof are immersed, and electrolytic polishing is performed to electrolyze only the pattern opening and the vicinity thereof Process,
A method of manufacturing a metal mask for screen printing with a plate frame, comprising:   The electrolytic cell used in the electrolytic polishing step is usually a two-divided structure separated, and in the case of the electrolytic polishing step, only the pattern opening of the metal mask for which the laser processing has been completed and the vicinity thereof are 6. A method of manufacturing a metal mask for screen printing with a plate frame according to claim 5, wherein the electrolytic solution is circulated by being sandwiched from both sides and the electrolytic solution is circulated.   7. The screen printing metal with a plate frame according to claim 6, wherein the electrolytic cell of the two-parted structure is provided with an annular liquid leakage prevention seal at an opening peripheral portion in contact with the vicinity of the periphery of the pattern opening of the metal mask. How to make a mask. Prior to receiving an order, a tacking step is performed by preparing in advance an original plate for a screen mask with a screen frame having a frame attached to the plate frame and an outer peripheral edge of an unprocessed metal mask attached by an adhesive. ,
A laser processing step of drilling a pattern opening by laser processing in a central pattern area of the unprocessed metal mask in a state of being tucked to the plate frame after receiving an order;
In the chemical bath containing the chemical polishing liquid, only the pattern opening of the metal mask after laser processing and the vicinity of the periphery are immersed and chemically polished by the chemical reaction. Chemical polishing process to chemically polish only
A method of manufacturing a metal mask for screen printing with a plate frame, comprising:   The pattern opening of the metal mask after the laser processing and the outer peripheral region in the vicinity of the periphery are covered with a protective layer as a non-chemically polishable area which is not chemically polished by the chemical reaction of the chemical polishing solution. A method of manufacturing a metal mask for screen printing with a frame according to claim 8.

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