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    • 4. 发明申请
    • MOLDING PROCESSES AND TOOLS THEREFOR
    • 成型工艺和工具
    • WO2008128167A2
    • 2008-10-23
    • PCT/US2008060211
    • 2008-04-14
    • PURDUE RESEARCH FOUNDATIONGALLAGHER JEFF MCIPRA RAYMOND JSIEGMUND THOMAS H
    • GALLAGHER JEFF MCIPRA RAYMOND JSIEGMUND THOMAS H
    • B29C45/26G06F17/50
    • B29C51/10B29C33/0011B29C33/18B29C33/302B29C70/382B29C70/48B29K2707/04B33Y80/00
    • A molding process and apparatus suitable for use in molding processes, including rapid prototyping processes and short run production processes. The molding process and apparatus entail the use of a reconfigurable screen tool (10) having a housing (12) defining a manifold cavity (22) and a plurality of substantially parallel pins (16), each having a head (20) protruding from the housing (12) and a shank (18) protruding into the housing (12). The heads (20) of the pins (16) define a screen surface (28) through which air is able to flow, for example, through gaps between adjacent heads (20) or through internal passages (21 ) within the pins (16). The process further includes axially moving the pins (16) to configure the screen surface (28), preventing further axial movement of the pins (16) relative to each other, and then drawing a vacuum within the manifold cavity (22) and creating a vacuum at the screen surface (28).
    • 适用于模塑工艺的模塑工艺和设备,包括快速成型工艺和短期生产工艺。 模制过程和设备需要使用具有限定歧管空腔(22)和多个基本上平行的销(16)的壳体(12)的可重新构造的筛工具(10),每个销具有从 壳体(12)和伸入壳体(12)中的柄部(18)。 销(16)的头部(20)限定了空气能够例如通过销(16)内的相邻头部(20)之间的间隙或通过内部通道(21)流动的筛面(28) 。 该过程还包括轴向移动销(16)以构造筛面(28),防止销(16)相对于彼此进一步轴向移动,然后在歧管腔(22)内抽吸真空并产生 真空在筛面(28)处。