JPH10157063A - Screen printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure uniform printability without difference in the printability between an end and a center of a printing range in the case of printing by pressing a squeegee rubber into contact with a screen form plate and sliding it. SOLUTION: This printer prints printing paste on a screen photolithography 4 installed in a screen frame 3 on a matter 5 to be printed by using a squeegee rubber 1. In this case, a pressing unit 6 for pressing screen photolithographies 4 at both sides of the photolithography 4 in contact with the rubber 1 to the to-be-printed matter 5 when the rubber 1 is pressed into contact with the photolithography 4, slid and printed, is provided. This unit 6 can regulate the pressing amount of the photolithography 4 at 0.1mm unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing machine used for manufacturing a printed wiring board.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a printed wiring board, a printing paste, such as an etching resist, a solder resist, or a conductor paste, on a screen plate installed on a plate frame is printed on a printing material using a squeegee rubber. Screen printing machine is used. A conventional screen printing machine will be described with reference to a sectional view of FIG. As shown in FIG. 2, the conventional screen printing machine includes a squeegee device for fixing the squeegee rubber 1 to the squeegee holder 2. The printing paste is printed on the printing object 5 by sliding in the direction. Normally, squeegee rubber 1
Is set wider than the width of the print range A, as shown in FIG. However, when printing is performed using such a conventional screen printing machine, there is a difference in printability between the end and the center of the print range A. The reason for this is that the squeegee rubber 1
2 are deformed as shown in FIG. 2, so that the printing pressure at both ends of the squeegee rubber 1 is lower than the printing pressure at the center.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a printing method in which a squeegee rubber is pressed against a screen plate and slid to print. Another object of the present invention is to provide a screen printer capable of ensuring uniform printability without causing a difference in printability between an end portion and a center portion of a print range.

[0004]

According to a first aspect of the present invention, there is provided a screen printing machine for printing a printing paste on a screen plate installed on a printing frame on a printing material using a squeegee rubber. When printing is performed by pressing the squeegee rubber against the screen plate and sliding the printing plate, the screen plates on both sides of the screen plate with which the squeegee rubber comes into contact are provided with a pressing device that can be pressed into the printing material side. .

According to a second aspect of the present invention, there is provided a screen printing machine according to the first aspect, wherein the pressing device is a pressing device capable of adjusting a pressing amount of the screen plate in units of 0.1 mm. And

According to a third aspect of the present invention, in the screen printing machine according to the first or second aspect, a material of a portion of the pressing member of the screen plate provided in the pressing device, which is in contact with the screen plate, is made of rubber. There is a feature.

According to a fourth aspect of the present invention, there is provided a screen printing machine according to any one of the first to third aspects, wherein a pressing member of a screen plate provided in the pressing device is a wheel type capable of rotating. There is a feature.

In the screen printing machine of the present invention, when printing is performed by pressing the squeegee rubber against the screen plate and sliding the screen plate, the screen plates on both sides of the screen plate with which the squeegee rubber comes into contact can be pressed into the printing material side. The provision of the pushing device serves to prevent the tension of the screen plate stretched between the plate frames from directly affecting the end of the squeegee rubber. For this reason, in the screen printing machine of the present invention, the printing pressure does not easily vary depending on the location of the squeegee rubber.

[0009]

FIG. 1 is a sectional view showing an embodiment of the present invention. As shown in FIG. 1, the screen printing machine according to the embodiment uses a squeegee rubber 1 to apply a printing paste (not shown) on a screen plate 4 laid on a plate frame 3.
A screen printing machine that prints on a printing material 5 by pressing the squeegee rubber 1 against the screen plate 4 and slides the squeegee rubber 1 when printing is performed. 4 is provided with a pushing device 6 capable of pushing the printing material 4 into the printing material 5 side.
In this embodiment, the squeegee rubber 1 is fixed to the squeegee holder 2, and the width of the squeegee rubber 1 is wider than the width of the printing range A. The pressing device 6 has movable pressing members 7 at both sides of the squeegee rubber 1, and moves the pressing members 7 toward the printing object 5 to thereby move the screen plate 4.
It is configured to be able to be pushed into the printing material 5 side. The means for moving the pushing member 7 is not particularly limited, and may be hydraulic, pneumatic, screwed or the like.

When printing is performed using the screen printing machine shown in FIG. 1 having such a configuration, the tip of the pushing member 7 provided in the pushing device 6 is moved to a position in contact with the printing material 5 via the screen plate 4. Thus, the tension of the screen plate 4 can be supported by the pushing member 7. Therefore, when the squeegee rubber 1 is pressed against the screen plate 4 to be slid and printed,
Since there is no variation in printing pressure depending on the location of the squeegee rubber 1, there is no difference in printability between the end and the center of the print range A, and uniform printability can be secured.

In the above embodiment, the pushing device 6 pushes the screen plate 4 by 0.1 mm.
If the device can be adjusted in units, screen version 4
Pushing member 7 at the optimal position to support the tension of
Can be fixed, and the variation of the printing pressure depending on the location of the squeegee rubber 1 can be further reduced.

In the above embodiment, the pushing member 7 of the screen plate 4 provided in the pushing device 6 is
When the material of the portion in contact with the screen plate 4 is rubber, it is desirable because damage of the screen plate 4 by the pushing member 7 can be prevented.

In the above-described embodiment, when the pushing member 7 of the screen plate 4 provided in the pushing device 6 is a rotatable wheel type, damage of the screen plate 4 by the pushing member 7 can be prevented. So desirable.

[0014]

The screen printing machine according to the first and second aspects of the present invention provides a screen printing machine in which the squeegee rubber abuts against the screen printing plate and slides the screen printing when printing. Is provided with a pushing device that can be pushed into the printing material side,
The screen plate tension stretched between the plate frames does not deform the ends of the squeegee rubber. Therefore, according to the screen printing machine of the first and second aspects of the present invention, when printing is performed by pressing the squeegee rubber against the screen plate and sliding the printing, there is a difference in printability between the end and the center of the printing range. Does not occur, and uniform printability can be ensured.

Further, according to the screen printer of the third and fourth aspects of the present invention, in addition to the above-mentioned effects, there is an effect that the screen plate can be prevented from being damaged by the pushing device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an embodiment of a screen printer according to the present invention.

FIG. 2 is a cross-sectional view illustrating a conventional screen printing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Squeegee rubber 2 Squeegee holder 3 Plate frame 4 Screen plate 5 Printed material 6 Pressing device 7 Pressing member A Printing range

Claims (4)

[Claims] In a screen printing machine for printing a printing paste on a screen plate mounted on a plate frame on a printing material using a squeegee rubber, when printing is performed by sliding the squeegee rubber against the screen plate. A screen printing machine provided with a pressing device capable of pressing the screen plates on both sides of the screen plate against which the squeegee rubber comes into contact with the printing material side. 2. The screen printing press according to claim 1, wherein the pressing device is a pressing device capable of adjusting a pressing amount of the screen plate in units of 0.1 mm. 3. The screen printing press according to claim 1, wherein a material of a portion of the pressing member of the screen plate provided in the pressing device, which is in contact with the screen plate, is rubber. 4. The screen printing machine according to claim 1, wherein the pressing member of the screen plate provided in the pressing device is a rotatable wheel type.