Fibre felt forming and curing dies

Details Fibre felt forming and curing dies Fibre felt forming and curing dies

B - Operations, Transporting

28

B

18/1014, 154/144

B28B 21/42 (2006.01) B29C 33/04 (2006.01) B29C 70/52 (2006.01) F16L 59/02 (2006.01) F16L 59/10 (2006.01)

Patent

CA 1059891

ABSTRACT OF THE DISCLOSURE A fibre felt forming die assembly and method employ a mandrel having an external forming surface, an outer die extending around the mandrel and having an internal forming surface spaced from the mandrel external forming surface to define a gap for the advance of a felt therebetween. A heater is provided for heating the mandrel to thereby heat and at least partially cure the felt at and adjacent a surface of the felt facing the mandrel as the felt passes through the gap, and hot gas is then discharged through the entire thickness of the felt to further cure the felt. To counteract deposition of bonding material from the felt on the mandrel, an arrangement is provided for cooling the felt prior to the heating of the felt by the mandrel, so that the felt undergoes a rapid temperature transition.

234475

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