JP4547050B2 - Plate separation control method in screen printing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate separation control how the screen printing, is obtained by allowing a high-precision printing with particularly good plate separation in the screen printing.
[0002]
[Prior art]
In screen printing, a screen plate is placed and fixed on a printed material such as a printed circuit board and fixed, and the squeegee device is moved in one direction on the upper surface of the screen plate, so that the screen squeegee is placed between the two blades. A printing material such as ink is ejected and placed on the printing material through pattern holes formed on the screen by the blade, and then the pattern is formed on the printing material when the screen plate is peeled off.
[0003]
Thus, in order to obtain highly accurate screen printing, it is well known in the art that a so-called plate separation operation in which the screen plate is peeled from the printing material is important. That is, the printing material pushed into the pattern hole of the screen plate through the squeegee device is not sufficiently solidified in the pattern hole and is still in a soft state. This is because the printing material that is satisfactorily 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 placed on the upper surface of the printed material changes. Therefore, it goes without saying that separation of plates requires careful work.
[0004]
Conventionally, separation of a screen plate is performed by separating the screen plate by lifting one side of the screen plate from the start point side to the end point side after the squeegee device has finished moving. Originally, it is desirable that the separation of the screen plate is lifted parallel and perpendicular to the substrate to be printed. However, the screen plate itself is made of a thin metal plate and surrounded by a frame. Therefore, even if the frame is lifted horizontally, even if the central part of the screen plate is slightly smaller than the peripheral part of the frame, it is a fact that it hangs down. Because it will end up.
[0005]
Furthermore, even if the frame is lifted horizontally, the screen plate itself has elasticity, so the central portion of the screen plate hangs down and peels off at the end. Since the entire plate flutters, the printing material mounted on the screen plate falls on the substrate to be printed as well as being kicked or scraped at the inner edge of the pattern hole as described above. Lifting horizontally was impossible in reality.
[0006]
[Problems to be solved by the invention]
Therefore, the object of the present invention is, as described above, when the screen plate is peeled off, the screen plate is peeled off at an oblique angle with respect to the printing material, so that the printing material in the pattern holes of the screen plate is removed. The object is to solve the problem of being kicked or scraped by the inner edge of the pattern hole.
[0007]
Also, since the printing material in the pattern hole after the squeegee device has finished moving tends to harden and tends to adhere to the inner peripheral wall of the pattern hole, It is to prevent the phenomenon that the pattern fades due to the adhesion.
[0008]
Further, when the pattern hole of the screen plate is smaller than the wall thickness of the screen plate, the printing material pushed into the pattern hole stops in the pattern hole when the plate is separated, and is peeled off from the printing material together with the screen plate. It is to solve the problem that screen printing may become impossible.
[0009]
In addition, 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.
[0010]
Accordingly, the present invention provides a plate separation control method that enables good printing separation and enables screen printing with high printing accuracy.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention places a screen plate on the upper surface of the printing material, and loads the printing material onto the printing material from the pattern hole of the screen plate by a squeegee device that slides on the upper surface of the screen plate. In the screen printing method,
An enclosing body having a guide hole for enclosing the printed material at the lower part of the screen plate is arranged with the upper surface flush with the upper surface of the printed material, and the screen plate is separated after the squeegee device has finished moving. The frame body is moved upward, and the inner side of the frame body of the initial screen plate is inclined and the printing plate is moved downward along the guide hole in a state where the screen plate remains stationary above the guide hole. Move.
[0012]
[0013]
Therefore, the plate separation operation in screen printing is performed in the guide hole where the central portion of the screen plate does not sag, thereby achieving proper plate separation without any peeling, collapse, or adhesion failure of the printing material. .
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a lifting device 8 such as a hydraulic or pneumatic cylinder is fixed to an appropriate base 1, and a mounting table 10 is fixed to an upper end portion of an actuator 8a such as a piston rod. The mounting table 10 is a table. 11 can be moved up and down. The table 11 is supported and fixed on the base 1. A substrate (substrate) 2 is placed on the top surface of the mounting table 10, and the screen plate 3 is placed on the top surface of the substrate 2 in surface contact. The screen plate 3 is stretched and fixed to the frame 4. Has been. An enclosure 5 is disposed between the table 11 and the screen plate 3 so as to surround the substrate 2. The squeegee device 6 moves on the upper surface of the screen plate 3.
[0015]
As shown in FIG. 2, the surrounding body 5 is composed of a plate 5a having a guide hole 7 in which the printed material 2 is fitted so as to be movable in the vertical direction at a substantially central portion thereof. It has the same dimension as the wall thickness t of the printed matter 2 or larger than it. Therefore, the substrate 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.
[0016]
The screen plate 3 on the plate 5 a is provided so as to be movable up and down toward the substrate 2 through the frame 4. Therefore, the substrate 2 and the screen plate 3 can be moved up and down independently. The raising / lowering operation of the screen plate 3 may be either mechanical or manual. The enclosure 5 may be held in a fixed state at all times. However, as shown in FIG. 5, the enclosure 5 is connected to a piston rod 9 a of an appropriate hydraulic or pneumatic cylinder 9 to be parallel to the substrate 2. It is provided so that it can be raised and lowered. The piston rod 9 a is loosely fitted in an insertion hole 11 b formed in the table 11.
[0017]
Therefore, when separating the plate in the state shown in FIG. 1, when the squeegee device 6 is removed from the screen plate 3 and the frame 4 is lifted and the screen plate 3 is peeled off in the usual way, the screen plate 3 is guided in the initial stage. The upper part of the 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 piston rod 8 a is lowered so that the upper surface of the substrate 2 is lower than the upper surface of the surrounding body 5 . As a result, the printing material 2 on which the printing material is mounted descends while the screen plate 3 is still in a state of being stationary at the upper part of the guide hole 7, so that the screen plate 3 does not move. Good separation.
[0018]
Or, when the plate separating in the state shown in FIG. 1, with the exclusion of the squeegee device 6 onto the screen plate 3, lower than the upper surface of the piston rod 8a of the lowers enclosure 5 the upper surface of the substrate 2. As a result, the printing material 2 on which the printing material is mounted descends while the screen plate 3 is still in a state of being stationary at the upper part of the guide hole 7, so that the screen plate 3 does not move. Good separation.
[0019]
In addition, when the plate is separated in the state shown in FIG. 1, the squeegee device 6 is removed from the screen plate 3, and the screen plate 3 is raised together with the surrounding body 5 as shown in FIG. Pull away from 2. As a result, the printing material 2 on which the printing material is mounted descends while the screen plate 3 is still in a state of being stationary at the upper part of the guide hole 7, so that the screen plate 3 does not move. Good separation.
[0020]
Therefore, the screen plate 3 rises while being inclined almost at the same time as the frame body 4 at a portion close to the frame body 4, and hits the upper surface of the surrounding body 5 above the center portion away from the frame body 4, that is, above the substrate 2. Although trying to remain in contact, the screen plate 3 in the guide hole 7 does not further sag to the printed material 2 side because it is supported by the edge of the guide hole 7 and has a substantially constant height.
[0021]
Therefore, the separation of the screen plate 3 moves in a substantially vertical state with respect to the substrate 2, so that the pattern placed on the substrate 2 is printed by the movement of the screen plate 3 when separating the plate. Appropriate plate separation can be achieved without material peeling, collapsing, and adhesion failure.
[0022]
As shown in FIGS. 6 and 7, the surrounding body 5 may be a frame 5 b having a cylindrical guide hole 7 surrounding the printed material 2, and in this case, the height H of the frame 5 b is set to be the printed material 2. Is equal to or greater than the wall thickness t (H> t). In other configurations, the same parts as those in FIG.
[0023]
【The invention's effect】
According to the present invention described above, during the plate separation work after screen printing, the frame of the screen plate is moved upward, the inner side of the initial screen plate is inclined, and the screen plate is placed above the guide hole. before serial at the remaining states from moving downward along the guide hole of the substrate, before the entire screen plate is separated plate, a screen plate in the central portion in a state that always held parallel to the printing substrate Plate separation can be performed, whereby the pattern placed on the substrate can be prevented from being faded or damaged, and high-accuracy screen printing is possible.
[0024]
Further, since the plate or the frame always comes into contact with the screen plate and prevents the screen plate from bouncing, it is possible to prevent the screen plate from fluttering when the plate is separated. Furthermore, since the guide hole can fix and fix the printed material, the guide hole can also serve as the printed material fixing means by itself, 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 operation explanatory diagram. FIG. 4 is an operation explanatory diagram. FIG. 6 is a longitudinal front view showing still another example of the present invention. FIG. 7 is a perspective view of the enclosure shown in FIG.
DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Printed object 3 ... Screen plate 4 ... Frame 5 ... Enclosure 5a ... Plate 5b ... Frame 6 ... Squeegee device 7 ... Guide hole 8, 9 ... Lifting device 10 ... Mounting table 11 ... Table

Claims (1)

In screen printing in which a screen plate is placed on an upper surface of a substrate and a printing material is placed on the substrate through a pattern hole of the screen plate by a squeegee device that slides on the upper surface of the screen plate, An enclosure with a guide hole surrounding the printed material is placed with its upper surface flush with the upper surface of the printed material, and the screen plate frame is moved upward when the plate is released after the squeegee device has finished moving. The printing medium is moved downward along the guide hole in a state where the inner side of the frame body of the initial screen plate is inclined and the screen plate remains stationary above the guide hole. Plate separation control method in screen printing.

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