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3. 发明公开

EP2198993A1 Sintering process and corresponding sintering system 有权转让
标题翻译： Sinterverfahren und -vorrichtung
公开(公告)号：EP2198993A1
公开(公告)日：2010-06-23
申请号：EP08425809.4
申请日：2008-12-19
申请人： EPoS S.r.L.
发明人： Fais, Alessandro
IPC分类号： B22F3/14
CPC分类号： B22F3/14 , B22F2998/00 , B22F2999/00 , H01F41/0266 , B22F2207/17 , B22F3/105
摘要： A process is described for the sintering of powders (D) comprising conductive powders, loose or in the form of powder compacts, that comprises the operations of:
- inserting said powders (D) in a mould (23; 33, 34);
- applying (5, 6) a pressure (P(t)) to said powders (D) in said mould (23; 33, 34) commanding (4) nominal pressure values to pressure application devices (5, 6) to said powders (D);
- applying (1, 2, 3, 4) one or more current impulses (I i ) to said powders (D) in said mould (23; 33, 34) for a respective time interval of predetermined duration (t f ),
According to the invention, it is envisioned to
apply (5, 6) said pressure (P(t)) to said powders (D) through said pressure application devices (5, 6) in at least two opposing directions (21, 22; 31, 32),
said nominal pressure values (P(t)) commanded to said pressure application devices (5, 6) defining an increment of pressure (P i ) from a first pressure value (P 0 ) to a second pressure value (P 1 ) greater than said first pressure value (P 0 ),
said increment in the pressure (P i ) being applied in a synchronised way with respect to the initiation of said time interval of predetermined duration (t f ) of the current impulse (I i ),
said increment of the pressure (P i ) being also distributed in said time interval of predetermined duration (t f ) of the current impulse (I i ) so to reach said second pressure value (P 1 ) in a time instant comprised between a time instant (t m ) at which said current impulse (I i ) reaches the maximum value and an end instant of said time interval of predetermined duration (t f ).
摘要翻译：描述了包含以下操作的松散的或以粉末形式形成的导电粉末的粉末（D）的烧结方法： - 将所述粉末（D）插入模具（23; 33,34）中; - 向所述模具（23; 33,34）中的所述粉末（D）施加（5,6）压力（P（t）），命令（4）将压力施加装置（5,6）（D）; - 在所述模具（23; 33,34）中将预定持续时间（tf）的相应时间间隔施加（1,2,3,4）一个或多个电流脉冲（I i）到所述粉末（D）中，根据在本发明中，设想通过所述压力施加装置（5,6）在至少两个相对的方向（21,22; 31，...）上施加（5,6）所述压力（P（t））到所述粉末（D） 32），指令所述压力施加装置（5,6）的所述公称压力值（P（t））从第一压力值（P 0）到第二压力值（P 1）定义压力增量（P i））大于所述第一压力值（P 0）时，相对于当前脉冲（I i）的预定持续时间（tf）的所述时间间隔的启动，压力（P i）的所述增量以同步的方式施加，，所述压力的增加（P i）也在所述当前脉冲（I i）的预定持续时间（tf）的所述时间间隔内分布，以便达到所述第二压力值（P 1）在包括在所述电流脉冲（I i）达到最大值的时刻（t m）和所述预定持续时间（t f）的所述时间间隔的结束时刻之间的时刻内。

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