VACUUM EXTRUSION SPEED CONTROL METHOD

PURPOSE:To stabilize an extrusion speed to improve a quality of an extruded article in a vacuum extrusion speed control method wherein trapped air in a kneaded molding material is removed in a vacuum chamber, and the kneaded molding material is extruded at a speed in accordance with the rotating spe...

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Bibliographische Detailangaben
Hauptverfasser:	NAKAMURA TAKASHI, MORIDERA HIROMITSU
Format:	Patent
Sprache:	eng
Schlagworte:	PERFORMING OPERATIONS SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER TRANSPORTING WORKING CEMENT, CLAY, OR STONE
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Beschreibung
Zusammenfassung:	PURPOSE:To stabilize an extrusion speed to improve a quality of an extruded article in a vacuum extrusion speed control method wherein trapped air in a kneaded molding material is removed in a vacuum chamber, and the kneaded molding material is extruded at a speed in accordance with the rotating speed of an extrusion mill. CONSTITUTION:A position of an upper surface of a kneaded molding material 1 in a vacuum chamber 4 is detected by an electromagnetic wave. The positron of the upper surface is controlled by raising or lowering the rotating speed of a pug mill 2 for feeding the kneaded molding material into the vacuum chamber 4. A visible light can be used 10 place of an electromagnetic wave.