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Machine translation
1. (WO1980000137) PROCESS AND DEVICE FOR CASTING METAL PIECES IN A MOULD
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000137    International Application No.:    PCT/CH1979/000077
Publication Date: 07.02.1980 International Filing Date: 25.05.1979
IPC:
B22D 21/02 (2006.01), B22D 23/00 (2006.01)
Applicants:
Inventors:
Priority Data:
7158/78 30.06.1978 CH
Title (EN) PROCESS AND DEVICE FOR CASTING METAL PIECES IN A MOULD
(FR) PROCEDE ET DISPOSITIF POUR COULER DES PIECES METALLIQUES DANS UN MOULE
Abstract: front page image
(EN)A process and a device for casting metal pieces in a mould are provided. The aim is to provide an economical and fast method for producing oxydation-free pieces, which require as to their shape nothing but a slight finishing and which present particularly even and smooth metal surfaces. The process is adapted to gravitational or bottom casting, and comprises the introduction in the mould (1) from the top, before starting the casting, a predetermined amount of inert gas in liquid phase, and continuously introducing during the casting inert gas which comes out through an opening (5) at the upper part of the mould and stopping the gas supplied just before the end of the casting. An improvement of the process is that gas is introduced in a continuous manner before initiating the casting during a laps of time which corresponds at least to the ratio between the inner volume of the mould and the volume in gases phase of the liquid gas introduced per second.
(FR)Procede et dispositif pour couler des pieces metalliques dans un moule. Le but est de fabriquer de facon economique et rapide des pieces exemptes d"oxydation, qui ne demandent quant a leur forme que tout au plus une legere finition et qui presentent en particulier des surfaces metalliques regulieres et lisses. Le procede est propre a une coulee par gravite ou en source, et consiste a introduire dans le moule (1) par en haut, avant le debut de la coulee une quantite predeterminee de gaz inerte en phase liquide, et a introduire pendant la coulee de facon continue du gaz inerte qui ressort par une ouverture (5) de la partie superieure du moule et a n"interrompre l"arrivee du gaz que juste avant la fin de la coulee. Un developpement du procede consiste a introduire du gaz d"une maniere continue avant le debut de la coulee pendant un laps de temps qui correspond, au minimum, au rapport entre le volume interieur du moule et le volume en phase gazeuse du gaz liquide introduit par seconde.
Designated States:
Publication Language: German (DE)
Filing Language: German (DE)