JPH01159248A - Screen printing machine - Google Patents

Abstract

PURPOSE:To realize a position correction mechanism with a simple structure and thereby make a screen printing machine by correcting a position of a base plate in Y direction and a position in theta direction using a plurality of correction elements provided on a support means which supports a suction table. CONSTITUTION:Correction elements 15, 16 are actuated by driving the first and second correction motors 17, 18 until marks M, M are identified by identification cameras 20, 21 at a specified position. In this way, the position of a suction table 7 is corrected in a Y direction and a theta direction by operation of correction elements 15, 16. That is, the correction in the theta direction is made by a difference between a correction value Y1 obtained by the correction element 15 and a correction value Y2 by the correction element 16. Consequently, a positional shift of a base plate 6 in the Y and theta directions is corrected. After this, the correction elements 15, 16 are separated from engagement members 12, 13 by operation of the correction motors 17, 18 after the suction table 7 is fixed to a support table 8. The support table 7 is sent to a screen printing part 22 by means of an X direction drive motor 19 following the correction of the position in the Y direction. The feed value of the support table 7 as described above is adjusted in accordance with a shift value identified by the identification cameras 20, 21 and the base plate 6 is correctly set to a specified position in the screen printing part 22.

Description

DETAILED DESCRIPTION OF THE INVENTION 0) Industrial Field of Application The present invention relates to a screen printing machine having a substrate position adjustment mechanism for preventing misalignment of printing in screen printing of thick film integrated circuits, printed circuit boards, etc.

-) Conventional technology Conventionally, this type of substrate positioning has been performed by rough positioning based on the end face of the board or a hole provided in the board, and then suctioning it to a suction table, and then using the suction table to This device performs highly accurate positioning by displacing the
In No. 4-124968, a mark position is provided on the board and X is set based on the mark position.

A system has been proposed in which the position is adjusted by displacing a base movable in the Y and θ directions. In other words, X%Y as shown in Figure @3
In addition to the directional linear movement mechanism, it is equipped with a θ-direction rotary table mechanism to adjust the substrate position.

To explain the book and structure of Figure 2,
is the θ direction rotation table, (2) is the X direction movement pace, (
3) is an X-direction linear movement mechanism, (4) is a Y-direction movement base, and (5) is an X-direction linear movement mechanism.

el Problems to be Solved by the Invention In the prior art example No. 124968/1983, a mechanism for displacing the suction table individually in the XYθ directions is required, and the three-layer structure increases the size of the entire suction table, making it space-saving and lightweight. Further, there is the problem that the structure of a rotary motion mechanism is more complicated than that of a linear motion mechanism.

B) Means for solving the problems The present invention has been made in view of the above points,
a mounting means for placing a printing material on the printing material, a supporting means for slidably supporting the printing material, a recognition means for recognizing a positional shift amount of the printing material placed on the printing material placement means, and the above-mentioned a plurality of correction bodies provided on the support means, which abut from the KY direction of the placement means and correct the position of each abutment point in the Y direction according to the amount of positional deviation recognized by the recognition means; a moving means that moves in the X direction; a printing section that is provided in the movement range of the supporting means in the X direction and that performs screen printing on the printed material placed on the supporting means that has been moved; and adjusting means for controlling the moving means in accordance with the amount of deviation of the printing material in the X direction recognized by the recognition means to adjust the amount of movement of the support means in the X direction.

(e) Function: By correcting the substrate position in the Y direction using a plurality of correctors provided on the support means, the position in the θ direction is also corrected, so there is no need to use a complicated configuration such as an XYθ table. , a position correction mechanism can be provided with a simple configuration.

(f) Embodiment Figure 1 is a schematic top view of the screen printing machine of the present invention, in which (6) is a substrate for thick film integrated circuits or printed wiring, etc., and (7) is the substrate (6) that is sucked. A large number of suction holes (not shown) are provided on the lower surface of the substrate (6). Reference numeral (8) denotes a support stand that slidably supports this adsorption stand (7), and this stand itself is slidable in the X direction along the guide rails (9) (9). C11 (1G is the guide rail provided on the support stand (8), aυtLD
is a shaft body slidably attached to these guide rails CI (Hl), α addition 3 is a fitting member protruding laterally from the suction table (7), and the shaft part 111)q
l) is fitted. In addition, the above fitting member (13113
The end portion of the inner fitting member 13 is open, and a degree of freedom is given to the fitting position with the shaft portion IIB. (14I is a spring ll5 attached to the support base (8) and presses the suction base (7) (II is in contact with the fitting member f13+13 and presses the suction base (7) against the force of spring t14 (14) These correction bodies (X-direction movement and θ rotation of the suction table (71) are adjusted according to the suppression state at IsαG. α7) (181 is the screen printing machine main body (not shown) (19 is an X-direction drive motor for moving the support base (8) in the X direction; (211) is the alignment mark ed on the above board (6)
A recognition camera for recognizing e4 is shown, and is fixed at a predetermined position by an arm or the like (not shown). C22 indicates a screen printing section provided in the X movement direction of the support base (8), which prints solder cream. ( ] is the suction table +7), @1, and also controls the printing of solder cream in the screen printing unit.

In such a screen printing machine, when a substrate (6) is fed by a conveyor belt (not shown) and set on a suction table (7), the position of the substrate is corrected and screen printing is performed in the following steps. . First, the suction stand 17) suctions the substrate (6) under the control of the controller Ω. At this time,
The suction table (7) is connected to the corrector n5C by springs f14 and C14.
It is pressed toward the te side. Next, in this state, the first and second correction motors σηα♂ are driven by a command from the control device, and the recognition camera ω! 211 to operate the board (6
) is recognized in the Y direction. Then, the first and second correction motors (17) rt until the mark Me4 is recognized at a predetermined position by the recognition camera +21 (211).
81 and 151, the correction body f151 is created to correct the suction table (7) in the Y direction and the θ direction. That is, the correction in the θ direction is made by the difference between the correction -RYl corrected by the correction body (19) and the correction amount Y2 corrected by the correction body scream.

This corrects the positional deviation of the substrate (6) in the Y direction and the θ direction. After that, the suction table (7) is fixed to the diameter correction motor housing 1 fixed to the support table (8) by a locking mechanism (not shown).
By the operation of α♂, the correction body 051 (LgJ is connected to the fitting member [L
From 3113 to M. At this time, the displacement of the board (6) in the X direction is also recognized and stored by the recognition camera Qυ.

After correcting the position in the X direction, the X direction drive motor C19
The support stand (71) is sent to the screen printing section.

The feed amount of the support base (7) is determined by the recognition camera (2α12
It is adjusted according to the amount of deviation recognized in the 11th place, and the screen 8 printing part! ,! 20 The board (6) is accurately set in the predetermined position.Next, the screen printing unit prints a pattern of cream solder on the board (6) according to instructions from the control device.After printing is completed, the suction table The suction of the substrate (6) at (7) is released, and the substrate (6) is discharged by a conveyor belt (not shown).

(G) Effects of the Invention As described above, the screen printing machine of the present invention can also correct the position in the θ direction by correcting the substrate position in the Therefore, the position correction mechanism can be realized with a simple configuration without using a complicated configuration such as an XYθ table, and the screen printing machine can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a schematic top view of the screen printing machine of the present invention, and FIG. 2 is a perspective view of an XYe type suction table. (6)...Substrate, (7)...Suction table, (8)...
・Support stand, (91i91(1(1(1(1-chi))"
v-le, [11(111-m body, (13(131・
...Fitting member, +141 (141... spring, σs
Shout...correction body, anag...X direction correction motor,
a9...X-direction drive motor, ■I2D...recognition camera, +25...screen printing section, ■...control device.

Claims (1)

[Claims] 1) A placing means for placing a printed material, a supporting means for slidably supporting the placing means, and a recognition means for recognizing the amount of positional deviation of the printed material placed on the placing means. , a plurality of correction bodies provided on the support means, which abut the placement means from the Y direction and correct the position of each contact point in the Y direction according to the amount of positional deviation recognized by the recognition means; a moving means for moving the supporting means in the X direction; and a printing section that is provided in the moving range of the supporting means in the X direction and performs screen printing on the printed material placed on the mounting means on the moved supporting means. and an adjusting means for controlling the moving means to adjust the amount of movement of the supporting means in the X direction according to the amount of positional deviation of the printing material in the X direction recognized by the recognition means.