Device for hollow shell moulding by thermal setting

摘要

The device comprises a tube (32) to which a nozzle (34) is fixed, annular shaped radial fins surrounding the tube, and a protection ring that surrounds the tube. The tube and the nozzle form a closed enclosure with a heat pipe containing a coolant that passes between two opposite ends of the closed enclosure that forms an evaporator (46) and a condenser (48) of the heat pipe. The evaporator is formed by the nozzle to dip into the molten material. The radial fins project from an external surface of the tube into an end portion of the enclosure forming the condenser. The device comprises a tube (32) to which a nozzle (34) is fixed, annular shaped radial fins surrounding the tube, and a protection ring that surrounds the tube. The tube and the nozzle form a closed enclosure with a heat pipe containing a coolant that passes between two opposite ends of the closed enclosure that forms an evaporator (46) and a condenser (48) of the heat pipe. The evaporator is formed by the nozzle to dip into the molten material. The radial fins project from an external surface of the tube into an end portion of the enclosure forming the condenser. The nozzle comprises a transverse end wall and a circular side wall that define a recess at the center of the nozzle, and distribution channels that are distributed angularly in a thickness of the sidewall of the nozzle. The recess is formed by a bore and a counterbore produced near an edge leading of the bore opposite to the end wall. The counterbore forms a housing and a shoulder for the tube end on which the nozzle is fixed tightly. The channels extend to the ejection opening of compressed air on the side of end wall of the nozzle. The projection ring comprises radial air inlets that open externally to an air punch and internally in a distribution chamber arranged circularly in a thickness of the punch so that the end opposite to the opening of each distribution channel extends into the distribution chamber. An independent claim is included for an installation for molding hollow shells.