JP2006137201A - Screen printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance printing precision, to enable the manufacture of a screen forme which is smaller than in a usual processing pattern, to reduce the cost of the screen forme and to prolong the life of the screen forme. <P>SOLUTION: This screen printing machine, which conducts screen printing by using the screen forme, is equipped with a table placed opposite to the screen forme and with a screen sealing part sealing substantially a space between the screen forme and the table. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a screen printing machine used for printing electrical wiring on a substrate or printing resist in etching, and more specifically, the gas pressure between a screen mesh and a work is adjusted to the squeegee printing surface side of the screen mesh. It is related with the screen printer used for the screen printing method characterized by making it high compared with gas pressure of this.

FIG. 9 is a diagram showing a conventional technique.
In FIG. 9, 1 is a screen plate, 3 is a squeegee, 5 is a screen frame, 6 is a work, 8 is ink, and 10 is a table.
In the conventional screen printing, as shown in FIG. 9, a gap of usually 2 to 6 mm is provided between the screen plate 1 and the work 6 to be printed, and after supplying the ink 8 to the screen plate 1, the screen plate with the squeegee 3 1. While pressing 1 downward and extending the screen plate 1, the work 6 as the work substrate and the screen plate 1 are brought into close contact with each other, and the squeegee is moved forward. Printing was performed on the workpiece 6 as a processed substrate with the screen plate 1 being released.

In the conventional method of printing with a gap of 2 to 6 mm between the screen plate 1 and the work 6, since the screen plate 1 is stretched and printed, there is a problem of poor printing accuracy and the screen plate 1 is stretched and printed. Therefore, it is necessary to make the screen plate 1 large, and there is a problem that the cost of the screen plate 1 is increased and a problem that the life of the screen plate 1 is shortened because the screen plate 1 is extended and printed.
JP 2003-89190 A

An object of the present invention is to increase printing accuracy.
Another object of the present invention is to reduce the cost of the screen plate by making the screen plate smaller than conventional processing patterns.
Another object is to extend the life of the screen plate.

The screen printing machine according to the present invention is a screen printing machine for performing screen printing using a screen plate making and a squeegee,
A table arranged opposite to the screen plate making,
A screen sealing portion that substantially seals a space between the screen plate making and the table;
Gas supply means for supplying a gas having a pressure higher than the pressure of the atmosphere on the squeegee printing surface side of the screen plate making to the substantially sealed space between the screen plate making and the table is provided. .

  The gas supply means supplies gas toward the screen plate making, and is formed on at least one of the front and rear table surfaces with respect to the printing progress direction of the squeegee outside the work arranged on the table. And an elongated hole-like opening that is long in a direction substantially perpendicular to the printing progress direction of the squeegee.

The screen sealing part is a screen receiving part arranged with respect to the screen plate making,
And a sealing auxiliary portion arranged with respect to the table.

The screen printing machine further includes an elastic body,
The sealing auxiliary portion is slidably arranged with the table, and is pressed against the screen receiving portion by the table via the elastic body.

The screen sealing part further has a packing material,
The screen receiving part has a convex part formed in an annular shape, and the convex part is pressed against the sealing auxiliary part via the packing material.

  In the screen printing, the gas pressure between the screen plate 1 and the work 6 is set higher than the gas pressure on the squeegee printing surface side of the screen plate 1, so that the gas is printed on the work 6 by the squeegee using the screen plate 1. By separating the screen plate 1 from the workpiece 6 due to the pressure difference, it becomes possible to print with a smaller gap between the screen mesh and the substrate than before, improving the life of the screen plate and improving the printing accuracy. Improved.

Embodiment 1 FIG.
FIG. 1 is a top view of a screen printing machine table unit according to the first embodiment.
In FIG. 1, 10 is a table, 121 is an opening as an example of a supply hole, and 123 is a suction port. The opening 121 is formed in a long hole shape on the table surface of the table 10 that is long in a direction substantially perpendicular to the printing progress direction. The suction port 123 is arranged and fixed on the table by sucking the substrate. The opening 121 is formed at a position that does not contact the substrate when the suction port 123 is fixed to the table by sucking the substrate. The opening 121 formed in the shape of a long hole is formed in an opening equal to or longer than the length of the front side of the upper surface of the work 6 with respect to the printing progress direction. That is, the opening 121 has at least a width equal to or larger than the width of the workpiece disposed on the table in the printing progress direction. As will be described later, the opening 121 supplies gas toward the screen plate making 100.

FIG. 2 is a cross-sectional view of the screen printing machine table unit according to the first embodiment.
In FIG. 2, 1 is a screen plate, 5 is a screen frame, 11 is a spring support, 100 is a screen plate making, 131 is a screen receiving portion, 132 is a sealing auxiliary portion, 133 is a convex portion, and 141 is A sponge 142 as an example of a first packing material, 142 is a sponge as an example of a second packing material, and 150 is a spring material as an example of an elastic body. The screen plate making 100 includes a screen plate 1 and a screen frame 5. The screen sealing portion includes a screen receiving portion 131 and a sealing auxiliary portion 132. The screen receiving part 131 includes a convex part 133. The table 10 is the same as in FIG.
In FIG. 2, the table 10 is arranged to face the screen plate making 100. The table 10 has a substantially quadrangular prism shape, and a sealing auxiliary portion 132 is held on the side surface of the table 10 with a clearance fit. That is, the sealing assisting part 132 is slidably arranged with the table 10. The sealing assisting part 132 is formed in a substantially square frame shape in conformity with the table 10, and the sealing assisting part 132 is arranged on the table 10 via a plurality of spring members 150 by the spring support 11 fixed to the table 10 with several bolts. 10 side surfaces are held. The sealing assisting part 132 is pressed and held by the screen receiving part 131 via a sponge 142 formed in a substantially square frame shape with the upper surface matching the shape of the upper surface of the sealing assisting part 132. The screen receiver 131 is fixed to the printing machine body. The convex part 133 which is a part of the screen receiving part 131 is formed in a substantially square frame shape so as not to protrude from the inside or outside of the frame of the sealing auxiliary part 132. The convex portion 133 is formed in an annular shape, and is convex downward so as to press the sponge 142. By forming the convex downward, the pressing area is made smaller than when the sponge 142 is pressed on a wide plane, and the pressure against a certain pressing force is increased rather than pressing the sponge 142 on a wide plane. The sealing assisting part 132 is held between the spring support 11 and the convex part 133 via the sponge 142 by the repulsive force of the spring material 150 and presses the convex part 133. That is, the sealing assisting part 132 is pressed against the screen receiving part 131 by the table 10 via the elastic body. On the contrary, the convex portion is pressed against the sealing assisting portion 132 through the sponge 142. The table 10 moves up and down to adjust the position according to the size of the substrate to be printed. However, even if the table 10 moves, the expansion and contraction larger than the amount of movement of the table 10 so that the sealing assisting part 132 presses the convex part 133. A spring material 150 having an amount is used.
Therefore, even if the table 10 moves between the convex part 133 and the sealing assistance part 132, it is sealed (sealed).
The upper surface of the screen receiving portion 131 is fixed to the screen frame 5 of the screen plate making 100 so as to press the sponge 141 with the sponge 141 interposed therebetween. The sponge 141 is formed in a substantially square frame shape according to the shape in which the screen receiving portion 131 and the screen frame 5 are in contact with each other.
Therefore, the screen receiving part 131 and the screen frame 5 are sealed (sealed).
Therefore, the screen sealing portion substantially seals the space between the screen plate making 100 and the table 10.

FIG. 3 is a cross-sectional view of the screen printing machine table unit according to the first embodiment.
In FIG. 3, 122 is a compressed air supply part which is an example of a supply hole. FIG. 3 shows the compressed air supply unit 122 which is also shown in FIG. 2 which is not shown in FIG. The table 10 is the same as in FIGS. The screen plate making 100 is the same as that shown in FIG. The compressed air supply unit 122 is provided at the lower part of the table 10, communicates with the opening 121 on the upper surface of the table 10 in FIG. 1, and supplies gas toward the screen plate making 100.

FIG. 4 is a diagram showing a state at the time of printing in the first embodiment in which the screen sealing portion is omitted.
In FIG. 4, 3 is a squeegee, 8 is ink, and 6 is a work. The opening 121 is the same as in FIG. The screen plate 1, the screen plate 5, and the screen plate making 100 are the same as those in FIG. The compressed air supply unit 122 is the same as that in FIG. The table 10 is the same as that shown in FIGS.
In FIG. 4, the work 6 is printed by moving the ink 8 so as to push the ink 8 onto the work 6 while pressing the work 6. That is, the printing progress direction of the squeegee 3 is the same as the printing progress direction in the description of FIG.
In FIG. 4, as described in the description of FIG. 1, the opening 121 is located at a position where the suction port 123 is not in contact with the workpiece 6 when the suction port 123 is fixed to the table by sucking the workpiece 6 as a printing object, that is, the table 10. The squeegee 3 is formed on the outer side of the workpiece 6 and rearward with respect to the printing progress direction of the squeegee 3. The opening 121 supplies the gas supplied from the compressed air supply unit 122 toward the screen plate making 100. If the atmospheric pressure in the lower part of the screen plate 1 is higher than the atmospheric pressure in the upper part of the screen plate 1 by the supplied gas, that is, the pressure of the atmosphere that the screen plate 100 has on the side opposite to the table disposed oppositely. If the pressure is higher than that, even if the gap between the screen plate 1 and the work 6 is small, printing can be performed while the screen plate 1 and the work 6 are easily separated by the squeegee 3 during printing.
Here, it is desirable that the gas to be supplied is either air or nitrogen. The air is preferably clean air so as not to contaminate the workpiece 6. In order not to contaminate the work 6, argon or the like may be used in the same manner as nitrogen which is an inert gas.

FIG. 5 is a compressed gas piping system diagram.
In FIG. 5, reference numeral 200 denotes a regulator, 210 denotes a valve that is an example of an open valve, and 220 denotes a compressed gas generation and supply unit. The compressed air supply unit 122 is the same as that shown in FIGS. The compressed gas generation supply unit 220 includes a regulator 200 and a valve 210.
In FIG. 5, the regulator 200 adjusts the pressure of the supplied gas. The valve 210 releases the pressure increased by the gas supplied to the space between the substantially sealed screen plate making 100 and the table 10 after printing.
The compressed gas generation and supply unit 220 supplies the compressed air supply unit 122 with a gas having a pressure higher than the pressure of the atmosphere on the opposite side of the table 10 disposed opposite to the screen plate making 100.

As described above, the screen printing machine according to the first embodiment is a screen printing machine that performs screen printing using screen plate-making,
A table 10 disposed to face the screen plate making 100;
The screen printing machine includes a screen sealing unit that substantially seals the space between the screen plate making 100 and the table 10.

In addition, the screen printer in the first embodiment is
The screen sealing portion includes first and second packing materials, and the screen sealing portion includes:
A screen having a screen receiving part 131 disposed on the screen plate making 100 via the first packing material and a sealing auxiliary part 132 disposed on the screen receiving part 131 via the second packing material. It is a printing machine.

Moreover, the screen printing machine in the first embodiment further includes an elastic body,
The sealing auxiliary portion 132 is a screen printing machine that is slidably arranged with the table 10 and is pressed against the screen receiving portion 131 by the table 10 through the elastic body.

  Further, the screen receiving portion 131 in the first embodiment has a convex portion 133 formed in an annular shape, and the convex portion 133 is pressed against the sealing assisting portion 132 via a second packing material.

  The elastic body in the first embodiment is a spring material.

  Further, the table 10 in the first embodiment has a supply hole for supplying gas toward the screen plate making 100.

The screen printing machine according to the first embodiment is a screen printing machine that prints the workpiece 6 using the squeegee 3,
The supply hole is a screen printing machine formed on at least one of the front side and the rear side with respect to the printing progress direction of the squeegee 3 on the outside of the work 6 disposed on the table 10.

  Further, the supply hole in the first embodiment has a long hole-like opening 320 on the surface of the table 10 that is long in a direction substantially perpendicular to the printing progress direction of the squeegee 3.

  Further, the opening 320 in the first embodiment is an opening 320 having a width equal to or larger than the width of the work 6 disposed on the table 10 in the printing progress direction of the squeegee 3.

  Further, the gas in the first embodiment is either air or nitrogen.

Further, the screen printing machine according to the first embodiment further includes a compressed gas generation supply unit,
The compressed gas generation and supply unit is a screen printing machine that supplies a gas having a pressure higher than the pressure of the atmosphere on the opposite side of the table 10 disposed opposite to the screen plate making 100.

The compressed gas generation and supply unit in the first embodiment includes a regulator 200 that adjusts the pressure of the gas,
And an open valve for releasing the pressure increased by the gas supplied to the space between the substantially sealed screen plate making 100 and the table 10.

Embodiment 2. FIG.
FIG. 6 is an explanatory diagram for printing the lower part of the screen plate at a gas pressure higher than the atmospheric pressure.
In FIG. 6, 1 is a screen plate, 3 is a squeegee, 5 is a screen frame, 6 is a work, 10 is a table, 12 is a pressure holding frame, and 13 and 15 are high-pressure gas supply pipes. In the screen printing method in FIG. 6, the gas pressure between the screen plate 1 and the work 6 is reduced between the screen plate 1 and the work 6 by introducing a high-pressure gas having a gas pressure higher than the atmospheric pressure between the screen plate 1 and the work 6. A screen printing method for printing at a higher pressure than the gas pressure on the side, wherein a pressure holding frame 12 is provided between the screen frame 5 of the screen plate 1 and the table 10, and the screen plate 1 and the table are formed by the pressure holding frame 12. 10 is sealed except for the opening of the screen plate 1, and a high pressure gas having a pressure higher than the atmospheric pressure is introduced from the high pressure gas supply pipe 15, and the space between the screen plate 1 and the workpiece 6 is compared with the atmospheric pressure. This is a screen printing method for achieving high pressure.

  The workpiece 6 and the screen plate 1 are preferably set to 2 mm or less and 0.01 mm or more.

  Ink 8 is supplied to the screen plate 1 and printing is performed on the work 6 using the squeegee 3.

  The screen plate 1 always exerts a force to swell to the opposite side of the workpiece 6 during printing due to the pressure difference from the atmospheric pressure. Even if there is little clearance between the screen plate 1 and the workpiece 6, printing is performed with the squeegee 3. Sometimes it is possible to print while the screen plate 1 and the work 6 are easily separated.

Embodiment 3 FIG.
FIG. 7 is an explanatory diagram for printing the upper part of the screen plate at a gas pressure lower than the atmospheric pressure.
In FIG. 7, the gas pressure between the screen plate 1 and the workpiece 6 is compared with the gas pressure on the squeegee 3 side of the screen plate 1 by comparing the gas pressure on the squeegee 3 side of the screen plate 1 with the atmospheric pressure to make it a negative pressure. In this printing method, the pressure holding case 20 is installed on the opposite side of the screen plate 1 from the work 6 to keep the gas pressure lower than the atmospheric pressure.

  The inside of the pressure holding case 20 is sucked from the suction pipe 16 by a professional or a vacuum pump, and the gas pressure is set lower than the atmospheric pressure.

  The workpiece 6 and the screen plate 1 are preferably set to 2 mm or less and 0.01 mm or more.

  Ink 8 is supplied to the screen plate 1 and printing is performed on the work 6 using the squeegee 3.

  The screen plate 1 always exerts a force to swell on the opposite side of the workpiece 6 during printing due to the pressure difference from the atmospheric pressure. Even if the gap between the screen plate 1 and the workpiece 6 is small, the squeegee 3 Printing can be performed while the screen plate 1 and the workpiece 6 are easily separated during printing.

Embodiment 4 FIG.
FIG. 8 shows a method of separating the screen plate 1 and the work 6 at the time of printing by blowing high-pressure gas in the direction of the squeegee in the gap between the screen plate 1 and the work 6 or in the direction of the squeegee along the screen plate 1. It is.

  A gas injection nozzle is installed in the lower part of the screen plate 1 so that high-pressure gas flows in the gap between the screen plate 1 and the workpiece 6 in the direction of squeegee advance or along the screen plate 1 in the direction of squeegee advance.

  The workpiece 6 and the screen plate 1 are preferably set to 2 mm or less and 0.01 mm or more.

  Ink 8 is supplied to the screen plate 1 and printing is performed on the work 6 using the squeegee 3.

  Even when the gap between the screen plate 1 and the work 6 is small by separating the screen plate 1 from the work 6 by blowing a high-pressure gas having a gas pressure higher than atmospheric pressure from the gas injection nozzle toward the screen plate 1 during printing. When printing is performed with the squeegee 3, the screen plate 1 and the workpiece 6 can be printed while being easily separated from each other.

Embodiment 5. FIG.
FIG. 10 is a top view of the screen printing machine table unit according to the fifth embodiment.
In FIG. 10, 300 is a hole (an example of a supply hole), and 301 is a slit.
FIG. 11 is a view showing a cross section AA of FIG.
Other configurations are the same as those in the first embodiment.
10 and 11, in addition to the opening 121 in FIG. 1, the table 10 further includes the squeegee outside the work 6 disposed on the table 10 and in front of the printing progress direction of the squeegee 3. 3 has an elongated hole-shaped opening 121 (an example of a supply hole) that is long in a direction substantially perpendicular to the printing progress direction.
Two openings 121 on the front side and the rear side with respect to the printing progress direction of the squeegee 3 are formed so as to supply gas toward the screen plate 1 of the screen plate making 100 at an angle inclined toward the work 6 side. . That is, the gas is blown obliquely so as to flow into the gap between the screen plate 1 and the table 10. A slit 301 that allows a flow rate to be adjusted in the opening 121 and blocks a part of the upper portion of the opening 121 in order to supply gas toward the screen plate 1 of the screen plate making 100 at an angle inclined toward the workpiece 6 side. Is provided.
The holes 300 are formed outside the workpiece 6 arranged on the table 10 and on both sides with respect to the printing progress direction of the squeegee 3 and supply gas toward the screen plate 1 of the screen plate making 100.
A plurality of holes 300 are provided at predetermined intervals on both sides, but may be provided only on one side. The holes 300 supply gas upward toward the screen plate 1.
Here, the compressed air supply unit 122 may be provided at one place as shown in FIG. 3 or may be provided for each of a plurality of supply holes.

As described above, the fifth embodiment is characterized in that a plurality of gas supply holes are provided to supply gas from various directions.
Further, in the first embodiment, the opening 121 supplies the gas upward toward the screen plate 1, but the screen plate 1 and the table 10 are not provided like the opening 121 in the fifth embodiment. More preferably, the gas is blown obliquely so as to flow into the gap.

As described above, the screen printing machine according to the fifth embodiment is a screen printing machine that prints the workpiece 6 using the squeegee 3,
The supply hole is a screen printing machine formed on at least one of the front side and the rear side with respect to the printing progress direction of the squeegee 3 on the outside of the work 6 disposed on the table 10.

Further, the screen printer in the fifth embodiment is a screen printer that prints the workpiece 6 using the squeegee 3,
The table 10 is formed on the outside of the work 6 disposed on the table 10 and at least one of the front and the rear with respect to the printing progress direction of the squeegee 3, and the screen is inclined at the work 6 side. This is a screen printing machine having supply holes for supplying gas toward the plate making 100.

  Further, the supply hole in the fifth embodiment is further formed on the outside of the work 6 arranged on the table 10 and at least one of both sides with respect to the printing progress direction of the squeegee 3. Supply gas toward

Embodiment 6 FIG.
FIG. 12 is a top view of the screen printing machine table unit according to the sixth embodiment.
FIG. 13 is a diagram illustrating a cross section BB in FIG. 12.
In FIG. 13, 320 is an opening.
12 and 13, the front and rear openings 121 in the fifth embodiment are each divided into two. An opening 121 is provided between the mounting bolts of the table 10. Further, instead of the holes 300 in the fifth embodiment, the table 10 is formed on the side surfaces of the table 10 on both sides with respect to the printing progress direction of the squeegee 3, and the screen plate making 100, the table 10, the screen receiving portion 131, and the like. An opening 320 for supplying gas toward a space surrounded by the sponge 142 is provided. That is, the opening 320 is blowing out from the side.
Others are the same as in the fifth embodiment.
As described above, the printing area can be increased with respect to the predetermined table 10.

Embodiment 7 FIG.
FIG. 14 is a circulation flow diagram of compressed gas.
In FIG. 14, 401 is a filter, 402 is a compressed gas generation source (an example of a compressed gas generation unit), and 403 is a printing unit.
In the seventh embodiment, the gas supplied to the space between the substantially sealed screen plate making 100 and the table 10 is sent to the filter 401 to remove foreign substances, that is, to be filtered and filtered by the filter 401. In the circulation system, the gas is supplied to the compressed gas generation source 402, the pressure of the gas is increased, and the gas whose pressure is increased is supplied to the compressed air supply unit 122 in the printing unit 403.
In the first embodiment, it is assumed that dry air or nitrogen is supplied from the outside as compressed gas, and the compressed gas supplied to the substantially sealed space of the apparatus is opened to the outside by the valve 210 to be disposable.
However, if air introduced from the outside or new nitrogen is always used, the evaporation amount of a volatile solvent or the like contained in the ink 8 may be increased as compared with the case of printing without using compressed gas.
Therefore, as shown in FIG. 14, the circulation system may be configured to circulate the gas to be supplied inside the apparatus.

FIG. 15 is a piping diagram of the seventh embodiment.
In FIG. 15, reference numeral 501 denotes a pump (an example of a compressed gas generation unit), 502 denotes a valve, and 503 denotes a valve. Reference numeral 401 denotes a filter as in FIG. Other configurations are the same as those in FIG.
In the seventh embodiment, the pump 501 is used, but a blower may be used.
Initially, the valve 503 is opened and the valve 502 is closed. The regulator 200 adjusts the pressure of the gas supplied to the compressed air supply unit 122. Once gas is supplied, valve 503 is closed and valve 502 is opened. The valve 210 releases the pressure increased by the gas supplied to the space between the substantially sealed screen plate making 100 and the table 10 after printing.
The released gas is filtered by the filter 401, compressed by the pump 501, and returned to the regulator 200 via the valve 502, whereby the gas once used is circulated and reused.

  In the seventh embodiment, the circulation method is used in order to suppress the evaporation amount of the volatile solvent or the like contained in the ink 8. However, the solvent originally used in the ink 8 is included in other than the circulation method. Gas may be used.

As described above, the screen printing machine according to the seventh embodiment includes the compressed gas generation and supply unit 220.
The compressed gas generation and supply unit 220 includes:
A filter 401 that filters the gas supplied to the space between the substantially sealed screen plate making 100 and the table 10;
Increasing the pressure of the gas filtered by the filter 401 and supplying the compressed gas to the supply port;
Is a screen printing machine.

Further, the screen printing machine according to the seventh embodiment is a screen printing machine that performs screen printing using an ink containing a solvent,
The gas is a screen printer that is a gas containing the solvent.

The screen printer described in the first to seventh embodiments is summarized as follows.
The screen printing machine of the embodiment of the present invention is
A screen printing machine that performs screen printing using screen plate making,
A table arranged opposite to the screen plate making,
A screen sealing portion that substantially seals a space between the screen plate making and the table,
The screen sealing portion includes a screen receiving portion disposed with respect to the screen plate making and a sealing auxiliary portion disposed with respect to the table.

The screen printing machine further includes an elastic body,
The sealing auxiliary portion is slidably arranged with the table, and is pressed against the screen receiving portion by the table via the elastic body.

Further, the screen sealing part further has a packing material,
The screen receiving part has a convex part formed in an annular shape, and the convex part is pressed against the sealing auxiliary part via the packing material.

The screen printing machine of the embodiment of the present invention is
The work placed on the table is printed using the screen plate making and the squeegee, and the space between the screen plate making and the table is more than the pressure of the atmosphere on the opposite side of the table placed opposite to the table. A screen printing machine for supplying high pressure gas,
It is arranged on the table, supplies gas toward the screen plate making, is formed on at least one of the front and the rear with respect to the printing progress direction of the squeegee outside the work arranged on the table, The table surface of the table has an elongated hole-like opening that is long in a direction substantially perpendicular to the printing progress direction of the squeegee.

The screen printing machine further includes a regulator for adjusting the pressure of the gas,
And a release valve for releasing the pressure increased by the gas supplied to the space between the screen plate making and the table.

The screen printing machine is a screen printing machine that prints a workpiece using a squeegee,
The table is formed on at least one of the front side and the rear side with respect to the printing progress direction of the squeegee, and is directed toward the screen plate making at an angle inclined toward the work side. It has the supply hole which supplies.

  The supply hole is further formed on at least one of both sides of the squeegee in the printing progress direction outside the work arranged on the table, and supplies gas toward the screen plate making. Features.

In addition, the screen printing machine further includes
A filter that filters the gas supplied to the space between the substantially sealed screen plate making and the table;
Increasing the pressure of the gas filtered by the filter, and supplying the compressed gas to the supply port, the compressed gas generation unit,
It is provided with.

The screen printer is a screen printer that performs screen printing using an ink containing a solvent,
The gas is a gas containing the solvent.

  The screen printing machine further includes a supply hole for supplying gas to a space substantially sealed by the screen plate making, the table, and the screen sealing portion.

Example.
An address electrode is formed using a silver paste on a 20-inch plasma display back plate.

  The gap between the screen plate 1 and the glass substrate is set at 0.5 mm, a pressure holding frame is provided in the gap between the screen frame and the table that adsorbs the substrate, and 0.1 MPa from the high-pressure gas supply pipe at the bottom of the screen frame. High pressure air is introduced.

  The size of the screen plate 1 was set to be approximately 80 mm larger than the print pattern size.

  Printing is performed with 320 mesh stainless steel using a silver pace manufactured by NAMICS CORPORATION.

  Conventionally, printing was performed with a gap of 3 to 5 mm, but it was possible to print while separating the glass substrate and the screen plate 1 without any problem even with a gap of 0.5 mm.

  As described above, the gas pressure between the screen plate 1 and the workpiece 6 is compared with the gas pressure on the squeegee printing surface side of the screen plate 1 to increase the screen mesh in the direction opposite to the workpiece 6. When the screen plate 1 is used to print the workpiece 6 with the squeegee using the screen plate 1, the screen plate 1 is separated from the workpiece 6 by the differential pressure of the gas pressure during printing, thereby reducing the gap between the screen mesh and the substrate as compared with the conventional case. It becomes possible to print.

  As a method of increasing the gas pressure between the screen plate 1 and the work 6 in comparison with the gas pressure on the squeegee printing surface side of the screen plate 1, the space between the screen plate 1 and the work 6 other than the opening of the screen plate 1 is used. The space between the screen plate 1 and the work 6 is made higher than the atmosphere by introducing a high-pressure gas having a gas pressure higher than the atmospheric pressure between the screen plate 1 and the work 6 between the screen plate 1 and the work 6 or the squeegee moving part. In addition, the screen plate 1 on the squeegee printing surface side is sealed outside except for the opening, and the gas pressure on the squeegee printing surface side of the screen plate 1 is set to a negative pressure compared to the atmosphere by a pourer or a vacuum pump.

  Further, as a method of separating the screen plate 1 from the workpiece 6 during screen printing with high-pressure gas, the squeegee advances in the gap between the screen plate 1 and the workpiece 6 or in the direction of squeegee movement along the screen plate 1. A high pressure gas having a gas pressure higher than the atmospheric pressure may be sprayed toward the screen plate 1 so that the high pressure gas flows.

  The clearance between the screen plate 1 and the workpiece 6 is 2 mm or less, and is preferably set to 0.01 mm or more.

  As described above, in each embodiment, gas is supplied before printing, or the pressure between the screen plate 1 and the workpiece 6 is negative with respect to the pressure on the squeegee 3 contact side of the screen plate 1. By using the pressure, in a series of operations before printing, at the time of printing, and after printing, the screen plate 1 other than a certain portion pressed by the squeegee 3 and the work 6 are maintained with a small gap. Can be printed.

  Moreover, in each said embodiment, although the example which supplies gas from the table 10 or the screen frame 5 is shown, it does not restrict to this. As long as gas is supplied to the substantially sealed space between the screen plate 1 and the workpiece 6, the gas may be supplied from anywhere. For example, the screen receiving unit 131, the sealing auxiliary unit 132, and the sponges 141 and 142 may be used.

  As described above, the screen printer in each embodiment includes a supply hole for supplying gas to a space substantially sealed by the screen plate making 100, the table 10, and the screen sealing portion. It is a screen printer.

FIG. 3 is a top view of the screen printing machine table unit according to the first embodiment. FIG. 3 is a cross-sectional view of the screen printing machine table unit according to the first embodiment. FIG. 3 is a cross-sectional view of the screen printing machine table unit according to the first embodiment. It is a figure showing the state at the time of printing of Embodiment 1 which abbreviate | omitted the screen sealing part. It is a piping system diagram of compressed gas. Explanatory drawing which prints the screen plate lower part by the gas pressure high with respect to atmospheric pressure. Explanatory drawing which prints the screen plate upper part by the gas pressure low with respect to atmospheric pressure. Explanatory drawing which prints by spraying air on a screen version. Explanatory drawing of the conventional screen printing. FIG. 10 is a top view of a screen printing machine table unit according to a fifth embodiment. It is the figure showing the cross section AA of FIG. FIG. 10 is a top view of a screen printing machine table unit according to a sixth embodiment. FIG. 13 is a diagram illustrating a cross section BB in FIG. 12. It is a circulation flow figure of compressed gas. FIG. 10 is a piping system diagram of a seventh embodiment.

Explanation of symbols

  1 screen plate, 3 squeegee, 5 screen frame, 6 work, 8 ink, 10 table, 11 spring support, 12 pressure holding frame, 100 screen plate making, 121 opening, 122 compressed air supply, 123 suction port, 131 screen receiver Part, 132 Sealing auxiliary part, 133 Convex part, 141, 142 Sponge, 150 Spring material, 200 Regulator, 210 Valve, 220 Compressed gas generation supply part, 300 holes, 301 slit, 320 opening part, 401 filter, 402 Compressed gas generation Source, 403 printing section, 501 pump, 502 valve, 503 valve.

Claims (5)

A screen printing machine that performs screen printing using screen plate making and a squeegee,
A table arranged opposite to the screen plate making,
A screen sealing portion that substantially seals a space between the screen plate making and the table;
Gas supply means for supplying a gas having a pressure higher than the pressure of the atmosphere on the squeegee printing surface side of the screen plate making to the substantially sealed space between the screen plate making and the table is provided. Screen printing machine.   The gas supply means supplies gas toward the screen plate making, and is formed on at least one of the front and rear table surfaces with respect to the printing progress direction of the squeegee outside the work arranged on the table. The screen printing machine according to claim 1, further comprising an elongated hole-like opening that is long in a direction substantially perpendicular to the printing progress direction of the squeegee. The screen sealing part is a screen receiving part arranged with respect to the screen plate making,
The screen printing machine according to claim 1, further comprising a sealing auxiliary portion arranged with respect to the table. The screen printing machine further includes an elastic body,
4. The screen printing machine according to claim 3, wherein the sealing auxiliary portion is slidably arranged with the table and is pressed against the screen receiving portion by the table via the elastic body. The screen sealing part further has a packing material,
4. The screen printing machine according to claim 3, wherein the screen receiving part has a convex part formed in an annular shape, and the convex part is pressed against the sealing auxiliary part via the packing material.

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