Device for detecting material stresses in mouldings and castings

Details Device for detecting material stresses in mouldings and castings Device for detecting material stresses in mouldings and castings

1993-10-21

1995-06-27

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

Molding pressure control means responsive to pressure at...

264 403, 424555, B29C 4577

Patent

active

054275164

ABSTRACT:
A device which is capable of measuring both the viscous injection/casting operation and the shrinkage during the solidification phase, using a suitable measuring device. For this a sensor is fitted in the mould at the critical point expected, with a measuring surface that is flush with the inner wall and is able to measure shear and compressive stresses, so that for the first time the shrinkage phenomenon becomes measurable. With this, a new dimension of quality monitoring becomes possible.

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Z. Huaipu, A New Method for Measurement of Three Dimensional Residual Stresses in a Multi-Pass Butt Welded Joint, Feb. 1992.
C. Cavalloni, et al., New Piezoelectric Transducers for Internal Strain Measurement, Mar., 1990.

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