JP2003011320A - Work holding plate of screen printing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work holding plate of a screen printing machine on which a plate-shaped work can be mounted while the existence of foreign matter between the work and the plate is prevented. SOLUTION: The plate-shaped work 11 is set in the screen printing machine to be fixed on the work holding plate 10. A plurality of recessed parts 13 are formed in the surface of the work holding plate 10 on which the work 11 is mounted, and each recessed part 13 has a suction hole 14 in its bottom part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work holding plate for fixing and holding a plate-like work such as a ceramic substrate in a screen printing machine during screen printing.

[0002]

2. Description of the Related Art Conventionally, when a plate-shaped work is printed by a screen printing machine, a work holding plate is provided on the screen printing machine, and the plate-shaped work is placed and fixedly held on the work holding plate. Usually, a plate-like work fixedly held on the work-holding plate of this screen printing machine, for example, a fired ceramic substrate or a plastic substrate, is a foreign substance attached to the plate-like work, and the adhesive roller is applied to the adhesive roller side. After adhering and removing from the surface of the plate-like work, a printing screen mask is brought into contact with the surface of the plate-like work, and the printing paste on the printing screen mask is pushed out with a squeegee from the pattern opening of the printing screen mask. Wiring patterns are printed.

As shown in FIG. 4, a work holding plate 50 of a conventional screen printing machine is made of a metal plate made of, for example, an iron plate or a stainless plate, or a resin plate such as Bakelite. A plate-shaped work placement portion 51 formed by cutting the plate-shaped work by an amount corresponding to the plate thickness and having a size slightly larger than the outer dimension of the plate-shaped work.
In addition, a plurality of suction holes 52 are formed by being formed. The work holding plate 50 is mounted on the screen printing machine using a plurality of mounting holes 53 provided on the outer peripheral portion. The plate-shaped work is mounted on the mounting portion 51 of the work holding plate 50 mounted on the screen printing machine and sucked through the suction holes 52 to be fixedly held on the screen printing machine. In addition, the work holding plate 50 of the screen printing machine,
A plurality of handle parts 54 for holding the plate-like work when the plate-like work is placed on or taken out from the placing part 51 are formed, and the depressions of the handle parts 54 are used to remove the plate-like work. You can grab the side.

[0004]

However, the work holding plate of the conventional screen printing machine as described above has the following problems. (1) If there is a foreign object such as a fragment of a plate-like work, for example, a fragment of a ceramic, in the mounting portion on which the plate-like work is mounted,
Depending on the pressure of the squeegee at the time of printing and the pressure on the adhesive roller to remove foreign matter adhering to the plate-like work,
The plate-like work may be cracked or broken. (2) When a squeegee is operated by bringing the printing screen mask into contact with the surface of the plate-like work and the surface of the mounting portion in parallel due to the presence of foreign matter, the printing screen mask may be damaged. There are cases. The present invention has been made in view of such circumstances,
An object of the present invention is to provide a work holding plate for a screen printing machine, which prevents cracks due to foreign matter remaining on the work holding plate of the screen printing machine.

[0005]

A work holding plate for a screen printing machine according to the present invention which meets the above object is provided on an upper portion of the screen printing machine, mounts a plate-shaped work, and holds the plate-shaped work in a fixed manner. In the work holding plate, a plurality of recesses are provided on the surface on which the plate-shaped work is placed, and furthermore, suction holes are provided at the bottoms of the recesses. As a result, the foreign matter does not fall into the recess formed in the work holding plate and does not get caught between the plate-shaped work and the surface of the plate-shaped work placement portion (placement portion) of the work holding plate. Even if pressure is applied to the plate-like work, it will not crack or break. Further, since the foreign matter is not caught, the surface of the plate-like work is parallel to the surface of the mounting portion, and the screen mask for printing is not scratched.

Here, in the work holding plate of the screen printing machine according to the present invention, each recess is circular in plan view,
Moreover, it is better to arrange in a staggered arrangement. With this, the maximum number of recesses can be easily formed on the mounting surface of the plate-like work, so that the foreign matter can be reliably dropped from the upper surface of the mounting portion to the recesses.

Further, in the work holding plate of the screen printing machine according to the present invention, it is preferable that a chamfer is provided on the outer peripheral edge of the surface of the recess. As a result, the foreign matter is likely to slide off the upper surface of the mounting portion, and the foreign matter can be easily dropped into the recess.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to the attached drawings, an embodiment in which the present invention is embodied will be described to provide an understanding of the present invention. FIG. 1 is a perspective view of a work holding plate of a screen printing machine according to an embodiment of the present invention.
FIG. 2 is an explanatory view of the zigzag arrangement of the recesses of the work holding plate of the screen printing machine, and FIGS. 3A and 3B are enlarged end views of the recesses of the work holding plate of the screen printing machine.

As shown in FIG. 1, a work holding plate 10 of a screen printing machine according to an embodiment of the present invention is arranged on a screen printing machine (not shown), and a plate-like work 11 is placed thereon. It is for fixing and holding. For example, a central portion of a metal plate, a resin plate, or the like is cut and processed by an amount substantially corresponding to the plate thickness of the plate-like work 11 (for example, about 1.0 mm). It is dug down and has a mounting portion 12 for the plate-shaped work 11 formed with a size (for example, 150 mm × 160 mm) slightly larger than the outer size of the plate-shaped work 11. The mounting portion 12 is provided with a plurality of recesses 13, and suction holes 14 are formed in the bottom of the recesses 13. Then, the work holding plate 10 is screwed and mounted on the screen printing machine using a plurality of mounting holes 15 provided on the outer peripheral portion of the work holding plate 10. It should be noted that the work holding plate 10 is adjacent to the mounting portion 12 and has a surface of the mounting portion 12 for gripping the plate-shaped workpiece 11 when the plate-shaped workpiece 11 is placed on or taken out from the mounting portion 12. A plurality of handle portions 16 are formed in a hole shape that is dug further deeper.

As shown in FIG. 2, the recess 13 has a circular shape (for example, a diameter of 3 mm to 10 mm and a depth of 1 m) on the mounting portion 12 of the work holding plate 10 by using a drilling machine or a milling machine.
m to 3 mm), and a plurality of (for example, 200 to 250) are provided in a honeycomb-like zigzag arrangement. When formed in a staggered arrangement, each adjacent recess 1
Since the distance between the three can be narrowed, foreign matter is likely to fall into the recess 13 from the upper surface of the mounting portion 12. If the foreign matter that has fallen is smaller than the diameter of the suction hole 14 (for example, a diameter of 1 mm to 2 mm), it is sucked into the suction hole 14 and removed, and if it is larger than the diameter of the suction hole 14, it enters the entrance of the suction hole 14. Since they are fixed, it is possible to prevent the foreign matter that has fallen into the concave portion 13 from jumping out again and being caught between the plate-shaped work 11 and the upper surface of the mounting portion 12.

As shown in FIG. 3A, a C chamfer 17 is provided on the outer peripheral edge of the surface of the recess 13. In addition,
As shown in FIG. 3B, the outer peripheral edge of the surface of the recess 13 is
An R chamfer 18 may be provided. The C chamfering 17 or the R chamfering 18 at the outer peripheral edge of the recess 13 makes it easier for foreign matter to slide off the upper surface of the mounting portion 12, and facilitates falling of the foreign matter.

Next, a method of performing screen printing on the plate-like work 11 using the work holding plate 10 of the screen printing machine according to the embodiment of the present invention will be described. For example, a plate-shaped work 11 made of a fired ceramic substrate or a plastic substrate is grasped by sandwiching the side surface of the plate-shaped work 11 with a mounting portion 12 of a work holding plate 10 mounted on a screen printer. The handle portions 16 formed adjacent to each other are used for placement. The portion where the plate-shaped workpiece 11 contacts the recess 13 of the workpiece holding plate 10 is a suction hole 14
The plate-like work 11 is fixedly held on the screen printing machine by suctioning with a suction machine. Then, the foreign matter attached to the surface of the plate-like work 11 such as a ceramic substrate or a plastic substrate is moved while rotating on the surface of the plate-like work 11 using an adhesive roller having an adhesive force, and the foreign matter is attached to the roller side. To remove. After that, the printing screen mask is brought into contact with the surface of the plate-like work 11, and the printing paste placed on the printing screen mask is moved by moving the squeegee to open the surface of the plate-like work 11 from the opening of the printing screen mask. It is extruded onto and printed to form a wiring pattern and the like. Then, the plate-like work 11 is taken out from the work holding plate 10 using the handle portion 16.

Even if a foreign object such as a ceramic piece is interposed between the plate-shaped work 11 and the mounting portion 12 of the work holding plate 10, the concave portion 13 formed in the mounting portion 12 and the suction hole 1 are formed.
Due to the suction from 4, the foreign matter falls from the upper surface of the mounting portion 12 into the concave portion 13. Therefore, even if pressure is applied to the plate-like work 11 by roller application or screen printing, the plate-like work 11 (for example, a ceramic substrate) will not be cracked or broken. In addition, since there is no space between the plate-shaped work 11 and the mounting portion 12 due to foreign matter, the plate-shaped work 11 can be securely fixed and held on the work holding plate 10, and reliable printing accuracy is ensured. it can. Further, since there is no foreign matter between the plate-like work 11 and the mounting portion 12, the plate-like work 11 does not protrude from the upper surface of the work holding plate 10, and the printing screen mask may be scratched. Does not occur. In the screen printing described above, the roller hooking on the plate-shaped work 11 may be omitted. The shape of the recess may be elliptical or polygonal other than circular. Further, the arrangement of the recesses may be in the shape of a double girder.

[0014]

The work holding plate of the screen printing machine according to claims 1 to 3 is provided with a plurality of recesses on the surface on which the plate-shaped work is placed, and further has suction holes at the bottom of the recesses. The foreign matter does not fall into the concave portion and does not get caught between the plate-shaped work and the surface of the mounting portion of the work holding plate. Therefore, even if pressure is applied to the plate-like work, cracking or breakage does not occur. Further, since the foreign matter is not caught, the surface of the plate-like work is parallel to the surface of the mounting portion, and the screen mask for printing is not scratched.

Particularly, in the work holding plate of the screen printing machine according to the second aspect, since each recess is circular in plan view and is provided in a zigzag arrangement, the work holding plate can be easily placed on the plane of the mounting portion of the plate-like work. The maximum number of recesses can be formed, and foreign matter can be reliably dropped from the upper surface of the mounting portion into the recesses.

Particularly, in the work holding plate of the screen printing machine according to the third aspect, the chamfer is provided on the outer peripheral edge of the concave portion, so that the foreign matter is likely to slip off from the upper surface of the mounting portion, and the foreign matter is removed. It can be easily dropped into the recess.

[Brief description of drawings]

FIG. 1 is a perspective view of a work holding plate of a screen printing machine according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a staggered arrangement of concave portions of a work holding plate of the screen printing machine.

3A and 3B are enlarged end views of a concave portion of a work holding plate of the screen printing machine.

FIG. 4 is a perspective view of a work holding plate of a conventional screen printing machine.

[Explanation of symbols]

10: Work holding plate, 11: Plate work, 12: Placement part, 13: Recessed part, 14: Suction hole, 15: Mounting hole, 1
6: Handle part, 17: C chamfer, 18: R chamfer

Continued front page    F-term (reference) 2C035 AA06 FA25 FD01                 5E343 AA02 AA23 BB72 DD03 FF02                       GG11

Claims (3)

[Claims] 1. A work holding plate provided on an upper portion of a screen printing machine for mounting a plate-shaped work and fixing and holding the plate-shaped work, wherein a plurality of recesses are formed on a surface on which the plate-shaped work is mounted. And a suction hole at the bottom of the recess, the work holding plate for a screen printing machine. 2. The work holding plate for a screen printing machine according to claim 1, wherein each of the recesses has a circular shape in plan view,
Moreover, it is a work holding plate for a screen printing machine, which is provided in a staggered arrangement. 3. The work holding plate for a screen printing machine according to claim 1 or 2, wherein a chamfer is provided at an outer peripheral edge of the surface of the concave portion.