Fuji Seiki Machine Works, Ltd.

Matsuo Ohtake

Hidemasa Suzuki

Mitsuru Watanabe

Shooichi Harada

A wet blasting machine having a blasting apparatus wherein slurry is supplied from a main hopper through a supply conduit to a blasting gun. Slurry can be bled from the supply conduit through a control valve into a vessel for collecting a predetermined volume of slurry. The weight of the vessel is measured to generate a first signal which represents the slurry weight, and hence the slurry concentration. The first signal is compared to a second preset signal which represents the desired slurry concentration. If the second signal indicates that the slurry concentration in the main hopper is less than the desired magnitude, then the comparator emits an output signal which activates a supply device for adding additional media to the main hopper. The supply device preferably includes a mixing hopper to which both dry media and slurry from the main hopper are initially fed and mixed, prior to the enriched slurry then being fed into the main hopper.

Wet blasting machine with automatic control system for slurry

A machine for finishing lead frames for integrated circuits, including a first rotatable turntable, and a plurality of first cassettes mounted thereon in angularly spaced relationship, each first cassette supporting a plurality of frames in vertically stacked relationship; a second rotatable turntable disposed a selected distance from the first turntable, and a plurality of second cassettes mounted on the second turntable in angularly spaced relationship, each second cassette accommodating a plurality of frames in vertically stacked relationship; a horizontally elongated transfer device extending from tangentially adjacent the first turntable to tangentially adjacent the second turntable for moving individual frames therebetween; a blasting chamber associated with the transfer device for subjecting the frames to a blasting media; a first mechanism for transferring frames from the first cassette onto the upstream end of the transfer device; and a second mechanism for transferring the frames from the downstream end of the transfer device into the second cassette.

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Numazu, Japan

Matsuo Ohtake