JPH0250840A - Positioning apparatus for screen printing - Google Patents

Abstract

PURPOSE:To shorten a cycle time by performing the detection of the positional shift of a work, the correction of the position of the work and screen printing in parallel by mounting a floating pallet to be loaded with the work on a moving mechanism such a turntable. CONSTITUTION:In a stage of a floating pallet 3, the floating pallet 3 is positioned by raising a pilot pin 7 from below to insert the same in the pilot hole 13 provided to the floating pallet 3 and the shift of the work on the floating pallet 3 is detected by a work positional shift detecting sensor 8 composed of a CCD camera. In a stage of a floating pallet 4, correction is performed by an XYtheta table 9 using the shift quantity of the work read in the stage of the floating pallet 3 as a correction value and screen printing is performed by a screen printing machine 6. The XYtheta table 9 raises a chuck 14 through the hole provided to a turntable 1 to fix the turntable 1 by magnetic force and allows the floating pallet 3 to move in an XYtheta direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a workpiece positioning device in screen printing such as a hybrid IC.

[Conventional technology]

Conventionally, this type of printing positioning device sets a workpiece 10 on an XYθ table 11 as shown in FIG. Screen printing machine 12
The position of the workpiece 10 was corrected by the XYθ table 11 when moving below.

[Problem to be solved by the invention]

The above-mentioned conventional print positioning apparatus has a drawback that the cycle time is long because workpiece setting, position correction, movement, and printing are performed in series on one XYθ table 11.

[Means to solve the problem]

The screen printing positioning device of the present invention includes a floating pallet for mounting a work, and a moving mechanism that moves the floating pallet intermittently between a plurality of stations, and the position of the work on the pallet at one of the stations. The present invention is characterized in that the shift is detected, and the pallet is moved at another station to correct the positional shift, and then screen printing is performed on the workpiece.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIGS. 1(a) to 1(c) are a plan view, a front view, and a side view, respectively, of an embodiment of the present invention. On the top surface of the turntable 1 there are floating pallets 2 to 2 for positioning workpieces.
5 is a provision. Although the floating pallets 2 to 5 are movable within a certain range of each position on the turntable 1, the rotary plate of the turntable 1 is fixed on the turntable 1 by a locking mechanism.

In FIG. 1(a), a workpiece (not shown) is mounted on a pallet on a stage of a floating pallet 2. As shown in FIG.

At the stage of the floating pallet 3, the floating pallet 3 is moved to the pilot hole 13 provided in the floating pallet 3 by raising the pilot pin 7 from below.
The shift amount of the workpiece on the floatic pallet 3 is determined by the workpiece position shift detection sensor 8 consisting of a CCD camera.

At the stage of the floating pallet 4, the shift amount of the workpiece read on the stage of the floating pallet 3 is used as a correction value, and an XYθ table 9 performs correction, and the screen printing machine 6 performs screen printing. A chuck 14 is raised through a hole provided in the turntable 1 with an XYθ table, the turntable 1 is fixed by magnetic force, and the floating pallet 3 is moved in the XYθ directions.

The floating pallet 5 stage is a stage for taking out the work after screen printing from the floating pallet 5.

〔Effect of the invention〕

As explained above, the present invention can perform workpiece position deviation detection 1 position correction and screen printing in parallel by providing a floating pallet for mounting workpieces on a moving mechanism such as a turntable, thereby shortening cycle time. There is an effect that can be achieved.

[Brief explanation of the drawing]

FIGS. 1(a), (b) and (c) are a top view, a front view and a right side view showing an embodiment of the present invention, respectively, and FIGS. 2(a) and (b) are respectively a conventional screen printing method. It is a top view and a right view which show an example of a positioning device. DESCRIPTION OF SYMBOLS 1... Turntable, 2-5... Floating pallet, 6... Screen printing machine, 7... Pilot pin, 8... Sensor for detecting workpiece position shift, 9
...XYθ table, 10...work, 11...
XYθ table, 12...screen printing machine.

Claims (1)

[Claims] The method includes a floating pallet for mounting a workpiece, and a moving mechanism that moves the floating pallet intermittently between a plurality of stations, detecting a positional shift of the workpiece on the pallet at one of the stations,
A screen printing positioning device characterized in that screen printing is performed on the workpiece after the pallet is moved at a station other than the station to correct the positional deviation.