Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1990-03-23
1991-12-10
Eley, Timothy V.
Metal working
Method of mechanical manufacture
With testing or indicating
295274, 29558, 427 8, 427239, 427237, 427292, B23Q 1700
Patent
active
050705881
ABSTRACT:
A process for producing a ceramic honeycomb extrusion die including at least ceramic material feed holes and forming channels. The process includes the steps of preparing a ceramic honeycomb extrusion die base body having a given size by machining, detecting differences in extruding speeds of a ceramic material extruded through the forming channels, sealing of openings of the ceramic material feed holes corresponding to the forming channels having greater extruding speeds of the ceramic material based on the detected differences, feeding the ceramic material through the ceramic material feed holes corresponding to the forming channels having smaller extruding speeds of the ceramic material, and repeating the preceding steps number of times necessary for adjusting and substantially making uniform flow resistance of all ceramic material flow paths of the entire die. The ceramic material flow paths are constituted by the ceramic material feed holes and the forming channels.
REFERENCES:
patent: 3038201 (1962-06-01), Harkenrider
Miwa Masaaki
Shiji Yoshihito
Eley Timothy V.
NGK Insulators Ltd.
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