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    VERFAHREN UND VORRICHTUNGEN ZUR HERSTELLUNG VON KUNSTHARZGEBUNDENEN SANDFORMKÖRPERN FÜR DEN METALLGUSS
    3.
    发明授权
    VERFAHREN UND VORRICHTUNGEN ZUR HERSTELLUNG VON KUNSTHARZGEBUNDENEN SANDFORMKÖRPERN FÜR DEN METALLGUSS 失效
    方法和用于制造树脂砂形体FOR METALLGUSS器件。

    公开(公告)号：EP0580691B1

    公开(公告)日：1995-04-12

    申请号：EP92908814.4

    申请日：1992-04-20

    申请人： Dossmann GmbH, Eisengiesserei und Maschinenfabrik

    发明人： KULLIK, Wolfgang ,  BELLER, Jacob ,  HERTLEIN, Günter

    IPC分类号： B22C9/12 ,  B22C15/23

    CPC分类号： B22C9/123

    摘要： A sand core bound with a synthetic resin for metal casting and formed in a core box is hardened by passing a hardener gas through the core. If the hardener gas is a component of a two-component resin, large quantities of hardener gas reactant are required to harden the resin binder. Conventionally, a very large excess of such a hardener gas in a mixture of hardener gas and carrier gas is passed through the sand core in a single pass and must then be removed, at considerable expense, from the waste gas, to prevent environmental pollution. In the invention, on the other hand, only a slight stoichiometric excess of hardener gas is used and therefore the waste gases can be vented directly to atmosphere. To this end, the hardener gas is pumped (12) in several passes through the core boxes (1) in a highly evacuated, closed-circuit line system (1, 11, 15). Before gassing is begun, a vacuum container (15) is evacuated by the pump (12). When air spontaneously enters the vacuum container (15), the core box (1) is evacuated and sucks in the hardener gas as a mixture of hardener gas and air or, preferably, the liquid hardener substance sprayed into an evaporator. In practical series operation of a core shooter for producing sand cores weighing 5 to 22 kg using resol as the resin binder and methyl formate as the hardener, the quantity of excess hardener used was 0 to 70 %.

    A method of filling cores with molding sand
    5.
    发明公开
    A method of filling cores with molding sand 失效
    用型砂填充型芯的方法

    公开(公告)号：EP0802004A3

    公开(公告)日：1997-11-12

    申请号：EP97106020.7

    申请日：1997-04-11

    申请人： SINTOKOGIO, LTD.

    发明人： Uzaki, Nagato ,  Kasazaki, Masayoshi ,  Harada, Hisashi ,  Sugimoto, Kazuo

    IPC分类号： B22C15/23 ,  B22C7/06

    CPC分类号： B22C7/065 ,  B22C15/23

    摘要： A method of filling a core cavity (2) is provided wherein the entire core cavity is uniformly filled with highly compacted sand for molding the core without the need of providing many ventholes. The method is characterized in that sand for molding the core is drawn into the core cavity (2) to preparatorily fill it, and after that the thus prepared sand is repeatedly and sequentially compacted by impulsively pressurizing the sand, starting from the sand at its innermost positions.

    摘要翻译： 提供一种填充型芯腔（2）的方法，其中整个型芯腔均匀填充有高度压实的砂，用于模制型芯而不需要提供许多通气孔。 该方法的特征在于，用于模制岩心的砂被吸入岩心空腔（2）中以预先填充岩心，然后通过冲击性地加压砂而反复并顺序地压实如此制备的砂，从砂的最内层 位置。

    Process and apparatus for producing casting cores
    7.
    发明公开
    Process and apparatus for producing casting cores 有权
    Verfahren und Vorrichtung zur Herstellung von Gusskernen

    公开(公告)号：EP1464420A1

    公开(公告)日：2004-10-06

    申请号：EP03425161.1

    申请日：2003-03-14

    申请人： Fata Aluminium S.p.A.

    发明人： Tosco, Bartolomeo

    IPC分类号： B22C7/06 ,  B22C9/12 ,  B22C15/23 ,  B22C1/22

    CPC分类号： B22C9/123 ,  B22C1/2293 ,  B22C7/065 ,  B22C15/24

    摘要： A method for producing sand cores for foundry, comprising the operations of:

    defining a moulding cavity (6);
    blowing in a mixture of sand and hydrated binder into said moulding cavity (6) so as to produce a mass of sand (M), which reproduces in a complementary way the shape of said moulding cavity (6); and
    producing the passage, through said mass of sand (M), of a flow of aeriform along at least one principal direction (X).

    The method comprises the operation of generating through said mass of sand (M) a flow of aeriform, directed at least in part in a radial direction with respect to said principal direction.

    摘要翻译： 一种用于生产铸造砂芯的方法，包括以下操作：限定模腔（6）; 将砂和水合粘合剂的混合物吹入所述模腔（6）中，以便产生一块砂（M），其以互补的方式再现所述模腔（6）的形状。 并且通过所述沙粒（M）产生沿着至少一个主方向（X）的气流的通道。 该方法包括通过所述质量的沙子（M）产生至少部分地相对于所述主方向的径向方向的气流的操作的操作。