Apparatus for sensing incomplete molding of an automold system

Details Apparatus for sensing incomplete molding of an automold system Apparatus for sensing incomplete molding of an automold system

1992-12-21

1994-10-04

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Control means responsive to product weight or dimension

264 401, 264 404, 425140, 425172, B29C 4576

Patent

active

053521072

ABSTRACT:
An apparatus for sensing incomplete molding of an automold system in process for molding semiconductor packages. The apparatus including an unloader unit having vacuum heads mounted on a horizontal plate of the unloader unit, and a plurality of devices for sensing incomplete molding formed at the horizontal plate at both sides of each of the vacuum heads, each of the devices corresponding to a cavity, each cavity containing a package, each device comprising a guide hole formed at either side of each of the vacuum heads of the horizontal plate of the unloader unit, a detect pin inserted in the guide hole which is adapted to be raised and lowered depending upon the condition of resin filled in a package, a spring inserted on the detect pin and in the hole to bias the detect pin downward, and a sensor fixedly mounted on the hole of the horizontal plate which is adapted to sense the upward and downward movement of the detect pin depending on the condition of resin filled in a package and to generate signal corresponding to incomplete filling of package.

REFERENCES:
patent: 2196268 (1940-04-01), Lyng
patent: 2790204 (1957-04-01), Edwards et al.
patent: 4412798 (1983-11-01), Avellino et al.
patent: 4515544 (1985-05-01), Boehm et al.
patent: 4571320 (1986-02-01), Walker
patent: 4603329 (1986-07-01), Bangerter

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