B - Operations – Transporting – 29 – F
Patent
B - Operations, Transporting
29
F
18/682
B29F 1/02 (1980.01)
Patent
CA 1159618
ABSTRACT A hot-duct system is equipped with heating conductors for feeding molten synthetic material to an injection-mould, preferably a multiple injection-mould with spot-injection for each moulding. A plurality of hot- duct sections are coupled together in unit-construction style and consist of a housing having at least one inlet- and one outlet-aperture and a heating conductor adapted to be connected to an electrical supply. The individual heating conductors in the hot-duct sections are adapted to be operated electrically independently of each other. The unit-construction design of the hot-duct system, in the form of individual hot-duct sections, makes it possible to use the same components, namely the same hot-duct sections, for injection-moulds of totally different designs. The individual hot-duct sections may also be used to build up a hot-duct system when the original injection-moulds have become worn and must be replaced. Thus full use may be made of the life of the hot-duct sections, independently of the service-life of the injection-mould. Since each hot-duct section has a heating conductor, which can be operated electrically independently of the adjacent, or some other, hot-duct sections the hot-duct system according to the invention makes it possible to heat up the individual hot-duct sections to different degrees. This permits thermal control of the molten synthetic material in various parts of the hot-duct system.
361041
Ewikon Entwicklung Und Konstruktion G.m.b.h. & Co. Kg
Fetherstonhaugh & Co.
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