METODO DE MANUFATURA DE UM TROCADOR DE CALOR TUBULAR TAL COMO O CILINDRO DE CONGELAMENTO DE UMA MAQUINA DE FABRICACAO DE SORVETE E CILINDRO ASSIM OBTIDO

摘要

The invention relates to a method of manufacturing freezing cylinders (1) for ice cream making machines, with incorporated evaporator of the refrigerating circuit, characterized in that it comprises the steps of: forming a helical groove (301) on the outer surface of the freezing cylinder (101); winding a flat strip (2) of annealed mild steel along said groove (301) in screw-thread fashion, and shrink-fitting a heated cylindrical steel liner (4) on the crests of said thread (2).