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41. 发明公开

EP0278762A3 Method and apparatus for use in casting articles 失效
标题翻译：用于铸造物品的方法和装置
公开(公告)号：EP0278762A3
公开(公告)日：1989-02-01
申请号：EP88301136.3
申请日：1988-02-11
申请人： PCC Airfoils, Inc.
发明人： Graham, Lawrence D. , Fetsko, Daniel George , George, Thomas , Crnkovic, Mark A. , James, William D. , Merz, Walter E.
IPC分类号： B22D27/04
CPC分类号： B22D27/04
摘要： An improved apparatus and method is used to cast a plurality of articles in a mold structure (30) having a plurality of article molds (32) disposed in an array having an open central portion. The article molds are filled with molten metal while the mold structure is supported on a chill plate. An inner baffle plate is disposed in the central portion of the array of article molds and retards the transfer of heat from the article molds to the chill plate. The inner baffle plate is supported by a support structure which extends through the chill plate (20). After the article molds have been filled with molten metal, the chill plate and mold structure are lowered relative to the inner baffle plate to increase the rate of heat transfer from the article molds to the chill plate through the open central portion of the array of article molds. Thereafter, the inner baffle (44) plate and support structure are lowered with the chill plate and mold structure. An outer baffle plate (46) extends around the outside of the mold structure and is supported by the support structure. The outer baffle plate may be pressed against the bottom of a furnace (14) to retard heat transfer between the inside and outside of the furnace along a path extending outside of the mold structure.

42. 发明公开

EP0172658A1 Method of forming powdered metal articles 失效
标题翻译：一种用于生产金属粉末体的过程。
公开(公告)号：EP0172658A1
公开(公告)日：1986-02-26
申请号：EP85305176.1
申请日：1985-07-19
申请人： PCC Airfoils, Inc.
发明人： Friedman, Gerald
IPC分类号： B22F3/14 , B22F5/04
CPC分类号： F01D5/28 , B22F3/1216 , B22F3/1258 , B22F3/1275 , B22F3/15 , B22F5/04 , B30B11/001 , F01D5/147 , F01D5/18 , Y10T29/49336
摘要： In forming an article, such as a turbine blade, of metal powder, a container (22) is first formed by electroplating a thin layer of metal over a pattern having a configuration which corresponds to the configuration of the article. The pattern is then removed to leave a container having a cavity with a configuration corresponding to the configuration of the article. The container is filled with metal powder and sealed. The container is then at least partially enclosed with a rigid body (32) of fluid permeable material having inner side surface areas disposed in abutting engagement with the container. Heat and fluid pressure are transmitted through the rigid body to compact the container and metal powder. The fluid pressure causes the side walls of the container to move away from the inner side surfaces of the rigid body of fluid permeable material. As this is occurring, the rigid body of fluid permeable material supports the container and holds it against excessive deflection under the influence of stresses induced in the container.

43. 发明公开

EP0149887A2 Apparatus and method for casting single crystal articles 失效
标题翻译：用于铸造单晶制品的方法和装置。
公开(公告)号：EP0149887A2
公开(公告)日：1985-07-31
申请号：EP84307282.8
申请日：1984-10-23
申请人： PCC Airfoils, Inc.
发明人： Horton, Robert A. , Jayaraman, Gowri S.
IPC分类号： B22D27/04
CPC分类号： B22D27/045
摘要： An apparatus for casting doubly oriented single crystal airfoils and similar articles includes a mold having an orientation selector which selects crystals having desired vertical and horizontal orientations. The orientation selector includes an upright primary growth passage having a lower end exposed to the upper side surface of a chill plate. A horizontal secondary growth passage is connected with the upper end of the primary growth passage and with the mold cavity. A gradient inducing passage is connected with the upper end of the primary growth passage and has a lower end exposed to the chill plate to promote the transmission of heat from the upper end of the primary growth passage to the chill plate after metal crystals have solidified in the gradient inducing growth passage.

44. 发明公开

EP0243095A3 Method and apparatus for casting articles 失效
标题翻译：铸造物品的方法和装置
公开(公告)号：EP0243095A3
公开(公告)日：1988-05-11
申请号：EP87303353
申请日：1987-04-15
申请人： PCC Airfoils, Inc.
发明人： Graham, Lawrence D.
IPC分类号： B22D27/04
CPC分类号： B22D33/04
摘要： In order to maintain fluid tight seals between open ended article mold cavities (42) and a chill plate (28) and to prevent cracking of article molds (32) at connections with a base plate (22), the base plate has sections which can be moved relative to each other under the effect of thermal expansion forces transmitted from a molten metal distribution system connected with the upper ends of the article molds. The base plate may be formed as one piece with stress concentration areas. During the casting of articles, stresses in the base plate crack the base plate at the areas of stress concentration to form the separate sections of the base plate. The areas of stress concentration can be formed by slots or grooves in the base plate. The areas of stress concentration can also be formed by bodies of expansion material having a greater coefficient of thermal expansion than the ceramic material of the base plate. Upon heating of the base plate, the bodies of expansion material expand to a greater extent than the ceramic material of the base plate and crack the base plate in preselected areas which are spaced from the connections between the article molds and the base plate.
摘要翻译：为了在开放式制品模具腔（42）和冷却板（28）之间保持流体密封，并且在与基板（22）的连接处防止制品模具（32）的开裂，基板具有可以在与制品模具的上端连接的熔融金属分配系统传递的热膨胀力的作用下相对于彼此移动。基板可以形成为具有应力集中区域的一体。在制品的铸造过程中，基板上的应力在应力集中区域处裂开基板，形成基板的分开部分。应力集中区域可以由基板中的槽或槽形成。应力集中的区域也可以由具有比基板的陶瓷材料更大的热膨胀系数的膨胀材料体形成。在加热基板时，膨胀材料体会比基板的陶瓷材料膨胀得更大，并且在与制品模具和基板之间的连接部分间隔开的预选区域中裂开基板。

45. 发明授权

EP0104794B1 Method of casting a one-piece wheel 有权转让
标题翻译：铸造单面轮的方法
公开(公告)号：EP0104794B1
公开(公告)日：1987-07-22
申请号：EP83305027.1
申请日：1983-08-31
申请人： PCC Airfoils, Inc.
发明人： Blazek, William S.
IPC分类号： B22D27/04
CPC分类号： B22D27/045

46. 发明公开

EP0105602A2 Mold core and method of forming internal passages in an airfoil 有权转让
标题翻译：模芯和用于在涡轮机叶片使内部空腔的方法。
公开(公告)号：EP0105602A2
公开(公告)日：1984-04-18
申请号：EP83305028.9
申请日：1983-08-31
申请人： PCC Airfoils, Inc.
发明人： Bishop, Thomas Harold
IPC分类号： B22C9/10 , B22C21/14
CPC分类号： B22C21/14 , B22C9/10 , B22C9/106
摘要： An improved core is adapted to extend axially through the central portion of a mold cavity in which an airfoil or other article is formed. The core is used to form cooling passages as the airfoil is cast in the mold cavity. The core has an elongated cantilevered center section which is disposed within a main or base section. A metallic pin member extends from a free end portion of the cantilevered center section of the core to the main section of the core to hold the free end portion of the cantilevered center section against movement relative to the main section.

47. 发明公开

EP0059550A2 Method of casting 有权转让
标题翻译： Verfahren zum吉森。
公开(公告)号：EP0059550A2
公开(公告)日：1982-09-08
申请号：EP82300767.9
申请日：1982-02-16
申请人： PCC Airfoils, Inc.
发明人： Vishnevsky, Constantine , Kolakowski, Thomas Alan
IPC分类号： B22D27/04
CPC分类号： B22D27/045
摘要： An improved method of casting an article decreases the time required to cast the article without affecting the quality of the article. When a directionally solidified (DS) casting is made, molten metal is poured into a mold cavity. One end of the mold cavity is exposed to a chill plate which initiates solidification of the molten metal. As the metal solidifies, a dendritic structure grows upwardly into the mold cavity. Molten metal is disposed in the interstices of the uppermost portions of dendritic structure. As the metal in the mold cavity cools, the molten metal in the interstices solidifies and the dendritic structure, including a region containing some molten metal in the interstices, continues to grow upwardly toward the upper end of the mold cavity. The directional solidification of the metal in the mold cavity is promoted by slowly withdrawing the mold from a furnace as the molten metal solidifies. In accordance with the present invention, when the upper end of the dendritic structure reaches the upper end of the mold cavity, the rate of withdrawal of the mold from the furnace is substantially increased to accelerate the solidification of the remaining molten metal.
摘要翻译：铸造物品的改进方法减少了铸造物品所需的时间，而不影响物品的质量。当制造定向凝固（DS）铸造时，将熔融金属倒入模腔中。模腔的一端暴露于启动熔融金属固化的冷却板上。当金属固化时，树枝状结构向上生长到模腔中。熔融金属设置在树状结构的最上部的间隙中。当模具腔中的金属冷却时，间隙中的熔融金属固化，并且树突状结构（包括在间隙中含有一些熔融金属的区域）继续向上朝向模腔的上端生长。当熔融金属凝固时，通过从炉中缓慢地取出模具来促进模具腔中金属的定向凝固。根据本发明，当树枝状结构的上端到达模具腔的上端时，模具从炉中取出的速度显着增加，以加速剩余熔融金属的固化。

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