Extrusion die for the manufacture of nets of artificial material

Abstract

Abstract AN EXTRUSION APPARATUS FOR PRODUCING TUBULAR ARTICLES OF A SOLIDIFIABLE EXTRUBLE MATERIAL HAVING A TUBULAR STRUCTURE THE APPARATUS HAS A TUBULAR MEMBER OPEN AT ONE END. A CORE MEMBER IS DISPOSED AXIALLY WITHIN THE TUBULAR MEMBER AND JOINTLY THEREWITH DEFINES AN ANNULAR SPACE TERMINATING IN AN ANNULAR EXTRUSION ORIFICE OPENING INTO THE INTERIOR OF THE TUBULAR MEMBER ADJACENT THE OPEN END THEREOF. THE CORE MEMBER HAS A SURFACE DISPOSED AXIALLY SPACE FROM THE OPEN END OF THE TUBULAR MEMBER DEFINING AN INNERMOST AXIALLY DISPOSED BOUNDARY OF SAID EXTRUSION ORIFICE RELATIVE TO THE OPEN END OF THE TUBULAR MEMBER. THE CORE MEMBER HAS A BORE DEFINING A CHAMBER ON AN END THEREOF ADJACENT THE OPEN END. A PISTON IS MOUNTED FOR RECIPPROCATION IN THE CHAMBER SELECTIVELY AND ALTERNATELY ACTUATED IN OPERATION TO A FIRST POSITION OBSTRUCTING THE ANNULAR EXTRUSION ORIFICE AND A SECOND POSITION UNOBSTRUCTING THE EXTRUSION ORIFICE. THE PISTON LOWER CIRCUMFERENTIAL EDGE PORTION HAS EXTRUSION NOTCHES CIRCUMFERENTIALLY SPACED THEREON OPEN TO SIDE SURFACES OF THE PISTON AND AND END FACE CONFRONTING THE OPEN END OF THE TUBULAR ELEMENT. SEPARATE, CIRCUMFERENTIALLY SPACED STRANDS ARE EXTRUDED THROUGH THESE NOTCHES IN A MACHINE DIRECTION WHEN THE EXTRUSION ORIFICE IS OBSTRUCTED BY THE PISTON AND AN ANNULAR RING INTEGRAL WITH THE STRANDS AND AS A CONTINUATION THEREOF WHEN THE EXTRUSION ORIFICES IS UNOBSTRUCTED.

Inventors

• 👤 Jacques Hureau

Bibliographic Details