JPH11245375A - Method for controlling snap-off in screen printing and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve snap-off in screen printing and carry out the printing of high accuracy. SOLUTION: An encircling body 5 formed of a plate with a guide hole 7 encircling a material 2 to be printed is fixed and supported to be lifted and lowered on the face same as the upper face of the material 2 disposed thereon. The material 2 to be printed can be placed on a placing bed 10 and lifted and lowered by a lifting device 8. A screen plate 3 can be lifted and lowered through a frame 4. At the time of snap-off, the screen plate 3 is released just as it is, or the encircling body 5 is lifted and released together with the screen plate, or the material 2 to be printed is lowered by a lifting device 8 simultaneously with the release of the screen plate 3 and released from the screen plate 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate separation control method and apparatus in screen printing, and more particularly to a plate separation control in screen printing that enables high-precision printing.

[0002]

2. Description of the Related Art In screen printing, two screens of a squeegee device are arranged by placing a screen plate on a printed material such as a printed circuit board, fixing the screen plate, and moving the squeegee device in one direction on the upper surface of the screen plate. A printing material such as ink is ejected from between the blades and is placed on the printing object through a pattern hole formed in the screen by the blade,
Thereafter, when the screen plate is peeled off, a pattern is formed on the substrate.

[0003] However, it is well known in the art that in order to obtain high-accuracy screen printing, a so-called separation operation of separating a screen plate from a substrate is important.
That is, the printing material pressed into the pattern holes of the screen plate through the squeegee device is still in a soft state without being sufficiently solidified in the pattern holes. This is because the printing material well placed on the upper surface of the printed material is also kicked or scraped by the inner edge of the pattern hole, so that the pattern mounted on the upper surface of the printing material changes. Therefore, it goes without saying that separation of the plate requires careful work.

Conventionally, the separation of the screen plate is performed by lifting one side of the screen plate from the starting point side to the end point side of the screen plate after the squeegee device has moved the screen plate. And It is originally desirable that the separation of the screen plate be peeled off by lifting it up in parallel and perpendicular to the substrate, but the screen plate itself is made of a thin metal plate or the like,
Since the surroundings are surrounded by the frame, even if the frame is lifted horizontally, even if the center of the screen plate is slightly smaller than the periphery of the frame, it is a reality that it will hang down, This is because the result is the same as above.

Furthermore, even when the frame is lifted horizontally, the center of the screen plate hangs down and peels off at last because the screen plate itself has elasticity. Thereby, since the entire screen plate flaps, not only is it kicked or shaved at the inner edge of the pattern hole as described above, but also the printing material mounted on the screen plate falls on the printing material, Lifting the frame horizontally was not feasible in practice.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to separate the screen plate from the printing substrate while separating the screen plate at an oblique angle with respect to the printing material as described above. It is an object of the present invention to solve the problem that a printing material in a pattern hole of a plate is kicked or scraped by an inner edge of the pattern hole.

After the squeegee device has finished moving, the printing material in the pattern holes starts to harden and tends to adhere to the inner peripheral wall of the pattern holes. An object of the present invention is to prevent a phenomenon that a pattern is thinned by the amount attached to the inner peripheral wall.

Further, when the pattern hole of the screen plate is smaller than the thickness of the screen plate, the printing material pressed into the pattern hole stops in the pattern hole when the plate separates, and the printing material is removed from the printing material together with the screen plate. An object of the present invention is to solve the problem that screen printing is sometimes impossible due to peeling.

Also, regardless of the size of the pattern holes in the screen plate, when the integration density is high, there is a problem that it is difficult to separate the plate.

Accordingly, the present invention provides a plate separation control method and apparatus capable of performing excellent plate separation and enabling screen printing with high printing accuracy.

[0011]

Means for Solving the Problems In order to solve the above problems,
According to the present invention, a screen plate is placed on the upper surface of a printing material,
In screen printing in which a squeegee device that slides on the upper surface of the screen plate places a printing material on a substrate through a pattern hole of the screen plate, the upper surface of the surrounding body provided with a guide hole surrounding the substrate is covered with the cover. A screen printing apparatus is arranged on the lower surface of the screen plate so as to be flush with the upper surface of the printed matter.

When the printing plate is separated from the printing plate after the screen printing, the printing plate is peeled off from the printing material through the frame as in the prior art, and simultaneously with the peeling, the printing material is lowered in the guide hole of the surrounding body. A method in which the screen plate is peeled before the complete peeling of the screen plate, a method in which the printed material is lowered in the guide hole of the surrounding body to be peeled before the screen plate is peeled, and a method in which the screen plate is raised together with the surrounding body from the printed material and peeled And how to provide.

Therefore, the separation of the printing plate in the screen printing is performed in the guide hole in which the center portion of the screen printing plate does not hang down, so that the printing plate can be properly separated without peeling, collapsing, poor adhesion, etc. Can be achieved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an elevating device 8 such as a hydraulic or pneumatic cylinder is mounted on an appropriate base 1.
And an actuator 8 such as a piston rod
The mounting table 10 is fixed to the upper end of the table a. The table 11 is supported and fixed on the base 1. A printing substrate (substrate) 2 is mounted on the upper surface of the mounting table 10, and a screen plate 3 is placed on the upper surface of the printing substrate 2 in surface contact, and the screen plate 3 is stretched and fixed to the frame 4. Have been. Between the table 11 and the screen plate 3, a surrounding body 5 surrounding the printing medium 2 is arranged. The squeegee device 6 moves on the upper surface of the screen plate 3.

As shown in FIG. 2, the enclosing body 5 is formed of a plate 5a having a guide hole 7 at its substantially central portion into which the printing material 2 is vertically movably fitted, and a thickness T of the plate 5a. Has a dimension at least equal to or greater than the thickness t of the substrate 2. Therefore, the printing medium 2 can move in the guide hole 7 in the vertical direction. The guide hole 7 and the hole 11a communicate with each other so that the mounting table 10 can move.

The screen plate 3 on the plate 5a has a frame 4
Is provided so as to be able to ascend and descend toward the printing substrate 2 via the. Therefore, the printing substrate 2 and the screen plate 3 can be independently raised and lowered. The raising and lowering operation of the screen plate 3 may be either mechanical or manual. Further, the surrounding body 5 may be held in a fixed state, but as shown in FIG. The surrounding body 5 is connected to the rod 9 a and provided so as to be able to move up and down in parallel with the printing substrate 2. The piston rod 9a is inserted into the insertion hole 11 formed in the table 11.
b is loosely fitted.

Therefore, when the plate is released in the state shown in FIG. 1, the squeegee device 6 is removed from above the screen plate 3, and the frame 4 is lifted up in a normal way to peel off the screen plate 3. 3, the upper part of the guide hole 7 is left, and the inner peripheral side of the frame 4 is inclined as shown in FIG. Therefore, as shown in FIG. 4, the upper surface of the printing medium 2 is made lower than the upper surface of the surrounding body 5 by lowering the piston rod 8 a. As a result, the printing material 2 on which the printing material is placed descends while keeping the screen plate 3 still above the guide holes 7 while keeping the screen plate 3 still, and the screen plate 3 does not move. Good separation.

Alternatively, when releasing the plate in the state shown in FIG. 1, the squeegee device 6 is removed from above the screen plate 3, and as shown in FIG. 5, the screen plate 3 is peeled off, that is, the frame 4 is raised. Before the piston rod 8a
Is lowered so that the upper surface of the printing medium 2 is lower than the upper surface of the surrounding body 5. Thereby, the printing material 2 on which the printing material is placed
Since the screen plate 3 is lowered above the guide hole 7 while keeping the screen plate 3 still at a standstill, the screen plate 3 does not move, so that the plate can be separated well.

Further, when the printing plate is separated in the state shown in FIG. 1, the squeegee device 6 is removed from the screen printing plate 3, and the screen printing plate 3 is raised together with the surrounding body 5 as shown in FIG. Is separated from the print substrate 2. Thereby, the printing material 2 on which the printing material is placed
Since the screen plate 3 is lowered above the guide hole 7 while keeping the screen plate 3 still at a standstill, the screen plate 3 does not move, so that the plate can be separated well.

Therefore, the screen plate 3 rises while inclining almost simultaneously with the frame 4 in a portion near the frame 4, and in a central portion away from the frame 4, that is, above the printing material 2, Although it is likely to remain in contact with the upper surface, it is supported by the edge of the guide hole 7 and has a substantially constant height, so that the screen plate 3 in the guide hole 7 may further hang down to the printing material 2 side. Absent.

For this reason, the separation of the screen plate 3 is caused to move in a substantially vertical state with respect to the substrate 2, so that the pattern mounted on the substrate 2 is released from the screen plate 3 when the plate is released. By the movement, it is possible to achieve proper separation of the printing plate without peeling, collapsing, and poor adhesion of the printing material.

As shown in FIGS. 7 and 8, the surrounding body 5 may be a frame 5b having a cylindrical guide hole 7 surrounding the printing material 2. In this case, the height H of the frame 5b is The thickness t of the substrate 2 is equal to or larger than the thickness t (H> t). In other configurations, the same portions as those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

[0023]

According to the present invention described above, when the printing plate is separated from the printing plate after the screen printing, the portion of the screen printing plate which is most likely to hang is placed and supported on the surrounding body surrounding the printing material. Before the entire plate is released, the plate can be released while the center screen plate is always kept parallel to the substrate, thereby thinning or damaging the pattern placed on the substrate. Can be prevented, and highly accurate screen printing can be performed.

Further, since the plate or the frame is always in contact with the screen plate to prevent the screen plate from bouncing, it is possible to prevent the screen plate from fluttering when the plate is separated. Further, since the guide hole can be fitted and fixed to the printing material, the guide hole itself can also serve as the printing material fixing means, and has an advantage that no other fixing means is required.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a plate.

FIG. 3 is an explanatory diagram of an operation.

FIG. 4 is an explanatory diagram of an operation.

FIG. 5 is an explanatory diagram of an operation.

FIG. 6 is a longitudinal sectional front view showing another example of the embodiment of the present invention.

FIG. 7 is a longitudinal sectional front view showing still another example of the present invention.

FIG. 8 is a perspective view of the surrounding body shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Printed material 3 ... Screen plate 4 ... Frame 5 ... Surrounding body 5a ... Plate 5b ... Frame 6 ... Squeegee device 7 ... Guide hole 8, 9 ... Lifting device 10 ... Mounting table 11 ... Table

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[Procedure amendment]

[Submission date] June 8, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (4)

[Claims] 1. A screen printing method comprising: placing a screen plate on an upper surface of a printing substrate; and placing a printing material on the printing substrate from a pattern hole of the screen plate by a squeegee device that slides on the upper surface of the screen plate. A surrounding body provided with a guide hole surrounding the printing material at the lower part of the printing plate is arranged so that the upper surface thereof is flush with the upper surface of the printing material, and when the squeegee device is moved away from the printing plate, the screen plate is covered. A plate separation control method for screen printing, wherein the plate is moved upward so as to be separated from a printed material and, at the same time, is moved downward so as to be separated from the screen plate along the guide holes. 2. A screen printing method comprising: placing a screen plate on an upper surface of a printing material; and mounting a printing material on the printing material from a pattern hole of the screen plate by a squeegee device that slides on the upper surface of the screen printing plate. At the lower part of the plate, a surrounding body having a guide hole surrounding the printing material is arranged such that the upper surface thereof is flush with the upper surface of the printing material, and when the squeegee device is moved away from the printing plate after the movement, the printing material is removed. A plate separation control method in screen printing, wherein the plate is moved downward along a guide hole so as to be separated from the screen plate. 3. A screen printing method in which a screen plate is placed on an upper surface of a printing material and a printing material is mounted on the printing material from a pattern hole of the screen plate by a squeegee device that slides on the upper surface of the screen printing plate. A surrounding body provided with a guide hole surrounding the printing material at the lower portion of the printing plate is arranged so that the upper surface thereof is flush with the upper surface of the printing material, and when the squeegee device is moved away from the printing plate, the surrounding body is screened. A plate separation control method in screen printing, wherein the plate is moved upward so as to be separated from a printing substrate together with the plate. 4. A screen printing method in which a screen plate is placed on an upper surface of a printing material and a printing material is mounted on the printing material from a pattern hole of the screen plate by a squeegee device that slides on the upper surface of the screen printing plate. A plate separation control method in screen printing, wherein a surrounding body having a guide hole surrounding a printed material is fixed to a lower portion of a screen plate so that an upper surface thereof is flush with an upper surface of the printing material.