Fabrication of metallic mould impressions in a ceramic mould using a model to form the impressions and coating with a metal powder that is sintered, applicable for metal and plastic injection moulding operations

摘要

The fabrication of a metallic mould impression by sintering a metal powder consists of: (a) choosing a ceramic powder and a metal powder as a function of the fabrication parameters; (b) depositing a thin homogeneous layer of the chosen ceramic powder on a support (6) of a laser assisted solid phase sintering device; (c) sintering the layer of ceramic powder without a binder or fluid, according to trajectories pre-established by laser scanning; (d) repeating the second and third stages (b and c) until the desired shape and dimensions of the model (7, 8) of the impression are obtained; (e) positioning the model, without alteration or subsequent treatment at the fourth stage (d), in a casting chassis (9, 10) into which the chosen metal powder can be cast with a view to it being sintered. An independent claim is also included for the model used in this method of fabrication of a metallic mould impression.