公开(公告)号：EP1480771A4

公开(公告)日：2006-04-12

申请号：EP03701363

申请日：2003-02-14

申请人： COMMW SCIENT IND RES ORG

发明人： MURRAY MORRIS TAYLOR ,  COPE MATTHEW ALAN ,  ROHAN PATRICK WILLIAM ,  QUADLING ALAN MICHAEL

IPC分类号： B22D35/04 ,  B22C9/08 ,  B22D17/00 ,  B22D17/22 ,  B22D17/20

CPC分类号： B22D17/2272 ,  B22D17/007 ,  Y10S164/90

摘要： A metal flow system, for high pressure die casting of alloys using a machine having a pressurised source of molten alloy and a mould defining at least one die cavity, defines a metal flow path by which alloy received from the pressurised source is able to flow into the die cavity. A first part of the length of the flow path includes a runner and a controlled expansion port (CEP) which increases in cross-sectional area, in the direction of alloy flow, from an inlet end of the CEP at an outlet end of the runner to an outlet end of the CEP. A CEP exit module (CEM) forms a second part of the length of the flow path from the outlet end of the CEP. The increase in cross-sectional area of the CEP is such that molten alloy, received at the CEP inlet end at a sufficient flow velocity, undergoes a reduction in flow velocity in its flow through the CEP whereby the alloy is caused to change from a molten state to a semi-solid state. The CEM has a form which controls the alloy flow whereby the alloy flow velocity decreases progressively from the level at the outlet end of the CEP whereby, at the location at which the flow path communicates with the die cavity, the alloy flow velocity is at a level significantly below the level at the outlet end of the CEP. The change in state generated in the CEP is able to be maintained substantially throughout filling of the die cavity and such that the alloy is able to undergo rapid solidification in the die cavity and back along the flow path towards the CEP.

摘要翻译： 使用具有熔融合金的加压源的机器和限定至少一个模腔的模具对合金进行高压压铸的金属流动系统限定金属流动路径，通过该金属流动路径从加压源接收的合金能够流入 模腔。 流动路径的长度的第一部分包括流道和受控膨胀端口（CEP），该受控膨胀端口在合金流动方向上的横截面积从流道出口端处的CEP的入口端部 到CEP的出口端。 CEP出口模块（CEM）形成从CEP出口端流动路径长度的第二部分。 CEP的横截面积的增加使得在CEP入口端处以足够的流速接收的熔融合金在其流过CEP的流速中经历降低的流动速度，由此使合金从熔融物 状态变为半固态。 CEM具有控制合金流动的形式，其中合金流动速度从CEP的出口端处的水平逐渐降低，由此在流动路径与模腔连通的位置处，合金流速处于 水平显着低于CEP出口端的水平。 在CEP中产生的状态变化能够在整个模腔填充期间基本保持并且使得合金能够在模腔中经历快速固化并且沿着朝向CEP的流动路径返回。