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1. 发明公开

EP3394220A1 PROCESS OF LOST WAX MICRO CASTING WITH RECYCLING OF EXHAUSTED WAX 审中-公开
公开(公告)号：EP3394220A1
公开(公告)日：2018-10-31
申请号：EP16847588.7
申请日：2016-12-27
申请人： Europea Microfusioni Aerospaziali S.p.A.
发明人： IORLANO Mario , LOTRECCHIANO Angelo , EUROPEA MICROFUSlONl AEROSPAZIALI S.p.A.
IPC分类号： C10G73/00 , B29C67/24 , C08L91/06
CPC分类号： C10G73/00 , B22C7/02 , B22C9/04 , B29C67/241 , B29K2909/02 , C08L91/06
摘要： The present invention relates to the recycling of exhausted wax in a process of lost wax micro casting, comprising the steps of: - molding of one or more wax models, identical to the end pieces to produce, using a first formulation of wax; - molding of one or more molds of sprues (connecting passages), using a second formulation of wax; - assembling of said one or more models and said one or more molds of sprues, to form a cluster; - coating of said cluster with a ceramic shell; - removing of wax from said shell; - treating of said shell in an oven; - casting of molten metal alloy within said shell and subsequent cooling to obtain a solidified casting; - cracking of the shell to release the solidified casting; - removing of the sprues and finishing of the pieces; and characterised in that it additionally comprises the following steps: - melting of the exhausted wax coming from said step of removing wax from said shell, to obtain a molten exhausted wax; - removing of water from said molten exhausted wax, to obtain de- hydrated molten exhausted wax; - removing of ceramic residues, ashes or other impurity by filtration of said de-hydrated molten exhausted wax, to obtain recycled wax; - adding virgin wax (grade 50-60°C) in a quantity equal to at least 30% by weight of the total of the recycled wax, and at least equal to the amount of recycled wax in the case in which the same has been already obtained following a process of lost wax micro casting in which a wax formulation that contain recycled wax was used, to obtain said second formulation of wax; - delivering of said second formulation of wax to said molding of one or more molds of sprues.

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