Press for pressing potlike articles from ceramic powder
AssigneeDorst-Keramikmaschinen-Bau Otto Dorst und Dipl.-Ing. Walter Schlegel
InventorRolf E. R. Schubart
Life of this patent
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Abstract
A press is disclosed for forming and shaping from ceramic powder articles ving a perimetrical leg-like portion. The press has an upper die and a lower mold, the latter having a central cavity closed at the top by a flexible membrane for receiving ceramic powder thereon. When the upper die closes on the mold, the membrane flexes to fit against the inside of the mold chamber. The mold chamber has flexible membrane walls which are forced inwardly by fluid pressure to shape and compress the perimetrical portions of the blank and upon release of the fluid pressure withdraw to permit removal of the finished blank.
Claims7
A press for pressing pot-like articles from ceramic powder, said articles having a bottom and a vertical peripheral side wall extending substantially at right angles to said bottom, said press having a punch die forming one face of the body of the article and a lower mould having a central cavity;
- an elastic membrane dividing said central cavity into an upper moulding chamber and a lower pressure chamber;
- said punch die in one position adapted to close the top of said moulding chamber, said press characterized by an elastic annular casing surrounding said moulding chamber and spaced from said elastic membrane, a rigid element surrounding said casing;
- an annular pressure channel between said element and casing;
- a source of fluid under pressure connected to both said lower pressure chamber and said pressure channel for simultaneously forcing said casing inwardly toward said elastic membrane and said elastic membrane upwardly to shape and compact ceramic powder confined between in said moulding chamber said elastic membrane, casing and punch die.
Dependencies are inferred from the claim text.