FLASK Russian patent published in 1996 - IPC

FIELD: flasks for vacuum molding upon individual, small-scale, serial and large-scale production process. SUBSTANCE: flask includes body having vacuum cavity and connected with that cavity ventilation holes, mounted on walls of that body heat exchangers in the form of tubular circuits for circulation of cooling liquid provided by pipelines for supplying and draining cooling liquid. Novelty is the provision of tubular circuit of heat exchanger by fluid-tight casing embracing outer surface of heat exchanger with gap and forming cavity filled with heat conductive material. Tubular circuit is in the form of block, for example, of tube block. Contour for supplying liquid to heat exchanger is placed near base of the above-mentioned block; parallel with it contour for draining liquid from heat exchanger is placed in upper part of that block. Both contours are mutually connected by row of cooling tubes. Cavity of heat exchanger is connected with atmosphere by pipeline and it is filled, for example, with aluminium powder. Heat exchanger has ports arranged in the same coordinate system as removable branch pipes joined with vacuum cavity of the flask and provided with ventilation holes. Flask, mainly, for vacuum molding provides increased safety, lowered energy consumption, reduced time period for operated of cooling refractory filler of flask before molding, reduced number of cooling apparatuses, decreased manufacturing areas and also short time period for cooling molds with castings, possibility of recovery of heat of metal filled mold for transferring it from heat exchangers to shop and other main lines, possibility of cooling castings from downwards to upstairs and therefore for increasing casting density and their fluid-tightness, simplified rigid design of heat exchanger, it operational reliability and therefore enlarged range of flask and heat exchanger, possibility of molding process mechanization. Heat exchanger may be used in other industry branches as system with enhanced safety. EFFECT: enhanced safety and increased efficiency. 1 cl, 8 dwg