Apparatus for pressing of clay pipe using an elastomeric mandrel

Abstract

Abstract A METHOD IS PROVIDED FOR FORMING A LENGHT OF GREEN CLAY PIPE FROM GRANULAR CLAY PATICLES WHERIN THE PARTICLES ARE INTRODUCED BETWEEN AN ELASTOMERIC MANDREL AND A SURROUNDING GENERALLY CYLINDRICAL WALL OF AN OUTER HOUSING, THEN THE MANDREL IS UNIFORMLY EXPANDED OUTWARDLY TO COMPRESS THE CLAY PARTICLES INTO A GREEN CLAY PIPE, WHICH IS THEN REMOVED FROM THE HOUSING. THE APPARATUS PROVIDES A THIN METALLIC SHELL LINING THE INNER FACE OF THE HOUSING FOR THE FULL LENGTH OF THE PIPE TO BE FORMED, AND REMOVAL OF THE FORMED PIPE IS FACILITATED EITHER BY (1) SLITTING THE SHELL FROM END TO END LONGITUDINALLY ALONG ONE OR MORE LINES EXTENDING FOR ITS FULL LENGTH AND PUSHING THE SHELL ENDWISE OUTWARDLY BY POWER MEANS AFTER THE PIPE IS FORMED OR (2) BY HOLDING THE SHELL SLIGHTLY COMPRESSED RADIALLY INWARD WHILE FORMING THE PIPE AND THEREAFTER RELASING THE STRES IN THE SHELL PERMITTING IT TO EXPAND AND TO RELEASE THE PIPE, OR (3) BY FORMING THE PIPE WHILE THE SHELL IS COLD AD THEREAFTER HEATING THE SHELL ELCTRICALLY OR BY STEAM CAUSING IT TO EXPAND AND RELEASE THE PIPE.

Inventors

• 👤 Richard H Anderson

Bibliographic Details