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1. 发明授权

US5072771A Method and apparatus for casting a metal article 失效
标题翻译：铸造金属制品的方法和装置
公开(公告)号：US5072771A
公开(公告)日：1991-12-17
申请号：US478251
申请日：1990-02-09
申请人： T. V. Rama Prasad
发明人： T. V. Rama Prasad
IPC分类号： B22D27/04
CPC分类号： B22D27/045
摘要： A long thin metal article having a thick portion is cast with a stress free interconnection between the thick and thin portions of the article. A heat transfer wall is provided around at least a portion of a mold in which the article is cast. To preheat the mold, heat is radiated from an inner side surface of a furnace wall to an outer side surface of the heat transfer wall. Heat is radiated from an inner side surface of the wall to the mold. Molten metal is conducted into the long thin portion of the article mold at a location other than along the length of the long thin portion of the article mold. During solidification of the molten metal, heat is radiated from the thick portion of the article mold to the inner side surface of the heat transfer wall. As the mold structure is withdrawn from the furnace chamber during solidification of the molten metal in the article mold cavity, heat is radiated from the outer side surface of the heat transfer wall to locations outside of the furnace. The presence of the heat transfer wall promotes a stress free solidification of the molten metal in the portion of the article where the thick and thin portions are interconnected.
摘要翻译：具有较厚部分的长的薄金属制品在制品的厚部分和薄部分之间以无应力的互连方式铸造。在制品被铸造的模具的至少一部分周围设置传热壁。为了预热模具，热量从炉壁的内侧表面辐射到传热壁的外侧表面。热量从壁的内侧表面辐射到模具。熔融金属沿着制品模具的长薄部分的长度以外的位置被导入制品模具的长薄部分。在熔融金属固化期间，热量从制品模具的厚部分辐射到传热壁的内侧表面。当模具结构在制品模腔中的熔融金属固化期间从炉室中取出时，热量从传热壁的外侧表面辐射到炉外。传热壁的存在促进了物品部分中熔融金属的无应力凝固，其中厚部分和薄部分互连。

2. 发明授权

US4905752A Method of casting a metal article 失效
标题翻译：铸造金属制品的方法
公开(公告)号：US4905752A
公开(公告)日：1990-03-06
申请号：US312044
申请日：1989-02-16
申请人： T. V. Rama Prasad
发明人： T. V. Rama Prasad
IPC分类号： B22D27/04
CPC分类号： B22D27/045
摘要： A long thin article having an enlarged end portion, such as a vane having a long thin airfoil and a shroud at the end of the airfoil, is cast by using a chill at the enlarged end portion of an article mold cavity. The chill is engaged by molten metal at the enlarged end portion of the article mold cavity. The molten metal quickly solidifies adjacent to the chill to eliminate the formation of defects. The chill is advantageously located in a pocket disposed at one end of the article mold cavity. The chills are placed in the pockets with the molds in an up-side-down orientation. The mold is then turned right-side-up and placed on a chill plate. The chills project from the mold and support the mold above the chill plate. During casting of an article, heat is transmitted from the enlarged end portion of the article through chill to the chill plate.
摘要翻译：通过在制品模腔的扩大端部处使用冷却，使具有扩大端部的长的薄制品（例如具有长薄翼型的翼片和在翼型的端部处的护罩）被浇铸。冷却在制品模腔的扩大端部处由熔融金属接合。熔融金属在冷却附近快速固化，以消除缺陷的形成。冷藏有利地位于设置在制品模腔一端的口袋中。将寒冷放置在口袋中，模具处于上下方向。然后将模具右侧向上转动并放置在冷却板上。来自模具的冷却工程从冷却板上方支撑模具。在铸造制品期间，热量通过冷却从制品的扩大端部传递到冷却板。

3. 发明授权

US4809764A Method of casting a metal article 失效
标题翻译：铸造金属制品的方法
公开(公告)号：US4809764A
公开(公告)日：1989-03-07
申请号：US174007
申请日：1988-03-28
申请人： T. V. Rama Prasad
发明人： T. V. Rama Prasad
IPC分类号： B22D27/04
CPC分类号： B22D27/045
摘要： A long, thin article or portion of an article of an equiaxed metal is cast without providing gates along the length of a portion of a mold cavity in which the long thin portion of the article is cast. Prior to casting the article, the lower half of the long thin portion of the article mold is heated into a temperature range in which the highest temperature is close to but less than the solidus temperature of the metal of the article. Molten metal is conducted into the long thin portion of the article mold cavity at a location other than along the length of the long thin portion of the article mold cavity. During solidification of the molten metal, molten metal is simultaneously solidified along surface areas in the lower half of the long thin portion of the mold cavity and along surface areas in the upper half of the long thin portion of the mold cavity. The solidificaton of the molten metal in the lower half of the long thin portion of the mold cavity is completed prior to completion of solidification of the molten metal in the upper half of the long thin portion of the mold cavity.
摘要翻译：将等长金属制品的长而薄的制品或部分铸造成不沿着模具腔的一部分的长度提供浇口，其中铸造制品的长薄部分。在铸造物品之前，制品模具的长薄部分的下半部分被加热到最高温度接近但小于制品金属的固相线温度的温度范围。熔融金属沿着制品模具腔的长薄部分的长度以外的位置被导入制品模腔的长薄部分。在熔融金属固化期间，熔融金属同时沿着模腔的长薄部分的下半部分中的表面区域和模腔长薄部分的上半部分中的表面区域固化。在模具的长薄部分的上半部分中的熔融金属凝固完成之前，模具腔的长薄部分的下半部分中的熔融金属的凝固完成。

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