Use of expanded anisotropic graphite as multi-cavity mold for hot pressing
Abstract
Abstract THE ANISOTROPIC EXPANDED GRAPHITE USED AS THE COMPRESSIBEL MOLD MODE IS COMPRESSIBLE IN THE DIRECTION IN WHICH PRESSURE IS BEING APPLIED BUT IS NOT COMPRESSIBLE IN THE TRANSVERSE DIRECTION AND THEREFORE EFFECTIVELY RESTRAINS LATERAL DIMENSION OF THE PRESSED SAMPLE TO ESSENTIALLY ITS INITIAL DIMENSION. OTHER COMPRESSIBLE MOLD MATERIALS ARE DISCLOSED, HOWEVER, THEY DO NOT HAVE THE ESSENTIAL ANIOSTROPIC COMPRESSION PROPERTIES OF THE ANISOTROPIC EXPANDED GRAPHITE. A METHOD FOR ENCONOMICALLY PRODUCING DENSE, REFRACTORY ARTICLES IN LARGE QUANTITIES BY HOT-PRESSING TECHNIQUES IS PROVIDED. A COMPRESSIBLE RETAINER IS PROVIDED WITH A PLURALITY OF CAVITIES WHICH ARE FILLED WIH A REFRACTORY MATERIAL AND THE ASSEMBLY IS THEN SUBJECTED TO A SIMULTANEOUS TEMPERATURE AND PRESSURE SUCH AS IN A SINGLE RAM MOLD. THE PRESSURE IS APPLIED UNTIL A DESIRABLE DENSITY IS ACHIEVED IN THE REFRACTORY MATERIAL AND AS MANY ARTICLES ARE PRODUCED IN ONE PRESSING AS THERE ARE CAVITIES.
Inventors
- 👤 Victor Mandorf Jr
- 👤 Robert G Fenish
Bibliographic Details
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