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    • 4. 发明公开
    • VERFAHREN ZUM GIEßEN VON GUSSTEILEN
    • VERFAHREN ZUMGIEßENVON GUSSTEILEN
    • EP3119545A1
    • 2017-01-25
    • EP15738697.0
    • 2015-07-20
    • Fritz Winter Eisengiesserei GmbH & Co. KG
    • ARNOLD, KlausROGOWSKI, DirkSCHMIDT, JürgenSÜSSMANN, Rolf
    • B22D29/00B22C21/00
    • C21D9/0068B22C5/06B22C5/085B22C9/02B22C9/046B22C9/10B22C9/108B22D29/003B22D30/00B22D45/005
    • The invention relates to a method for casting castings, wherein a casting mold is provided, which consists of one or more casting mold parts or casting mold cores, which are produced from a mold material, which consists of core sand, binder, and optional additives. The casting mold (2) is encased in a housing in such a way that a filling space (10) is formed between an inner surface segment of the housing and an associated outer surface segment of the casting mold (2). The filling space (10) is then filled with a free-flowing filling material (F) and metal melt is poured into the casting mold (2). In conjunction with the pouring in of the metal melt, the casting mold begins to radiate heat. As a result of the input of heat by means of the metal melt, the binder of the mold material begins to evaporate and to burn. The binder thus loses the effect thereof and the casting mold (2) disintegrates. According to the invention, the filling material (F) has such a low bulk density that a gas flow (S1, S2) can flow through the filling material packing formed from the filling material (F) in the filling space. During the filling of the filling space, the filling material (F) has a minimum temperature, proceeding from which the temperature of the filling material (F) rises due to process heat, which is formed by the heat radiated by the casting mold (2) and by the heat released during the burning of the binder, to above a limit temperature at which the binder evaporating out ignites and burns.
    • 本发明涉及一种用于铸造铸件的方法,其中提供了由模具材料制成的一个或多个铸造模具部件或铸模芯体组成的铸模,其由芯砂,粘合剂和任选的添加剂 。 铸模(2)以这样的方式包住壳体,使得在壳体的内表面段和铸模(2)的相关联的外表面段之间形成填充空间(10)。 然后,填充空间(10)填充有自由流动的填充材料(F),并将金属熔体注入铸模(2)中。 结合金属熔体的倒入,铸模开始散热。 由于通过金属熔体输入热量,模具材料的粘合剂开始蒸发并燃烧。 粘合剂因此失去其效果,并且铸模(2)分解。 根据本发明,填充材料(F)具有这样的低堆积密度,使得气流(S1,S2)可以流过填充空间中由填充材料(F)形成的填充材料填料。 在填充空间的填充期间,填充材料(F)具有最小温度,从而由填充材料(F)的温度由于由铸模(2)辐射的热而形成的加工热而升高 )和通过在粘合剂燃烧期间释放的热量达到粘合剂蒸发点燃和燃烧的极限温度以上。