Patent ID: 6331069
Filing Date: 2001-12-18
Classification: B28B,B30B

Abstract:
A spiral conveyor for a concrete extrusion machine, the conveyor comprising:a first spiral conveyor section, the first section being straight having a first length, a first external diameter, and flights of the first diameter, which is constant along the first length;a second spiral conveyor section having a second length, the first section being spaced apart from the second section, the second section having flights of a second diameter, which is constant along the second the length and which is greater than the first diameter, and having two longitudinally divided components, each said component having a longitudinal recess;a tapered, third spiral conveyor section between the first section and the second section, having a third length, a first end adjacent to the first section and a second end adjacent to the second section, the first end of the third section having the first external diameter and the second end of a third section having the second external diameter;means for mounting the spiral conveyor in the extrusion machine; anda hollow shaft adjacent to the second end of the third spiral conveyor section, the second spiral conveyor section being removably mounted on to the shaft, the shaft being received between the two components thereof.