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公开(公告)号：US06901989B1
公开(公告)日：2005-06-07
申请号：US09335851
申请日：1999-06-14
申请人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai , Thomas C. Pederson , Sheila Farrokhalaee Kia
发明人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai , Thomas C. Pederson , Sheila Farrokhalaee Kia
CPC分类号： B22C3/00 , B22C7/023 , B22D29/002 , B22D31/002 , F02F7/00 , F02F2200/08
摘要： In the lost foam casting of aluminum, coating a fugitive pattern with a refractory coating containing a thermally stable, water-insoluble, acid-gasifiable (e.g. CaCO3) compound, and contacting the casting, with the coating thereon, with an acid to dissociate and gasify the compound and rupture the coating. Preferably, any thermal degradation products from the pattern residing in the coating are neutralized to promote wetting of the coating.
摘要翻译： 在铝的失去泡沫铸造中，用含有热稳定的，水不溶性的，可酸化的（例如CaCO 3）化合物的耐火涂料涂覆一种逸散图案，并使铸件与涂层接触 用酸解离并气化化合物并使涂层破裂。 优选地，来自位于涂层中的图案的任何热降解产物被中和以促进涂层的润湿。
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公开(公告)号：US5996682A
公开(公告)日：1999-12-07
申请号：US47187
申请日：1998-03-09
CPC分类号： B22C1/2213 , B22C1/20 , B22C1/2286 , B22C7/02
摘要： A mold for a prototype metal casting or the like may advantageously be made by forming a casting pattern of adhesively bonded aggregate particles using a binder containing a principle constituent that is soluble in supercritical carbon dioxide; forming a rigid shell mold about the pattern of materials that are unaffected by supercritical carbon dioxide; thereafter exposing the pattern and mold combination to supercritical carbon dioxide to remove the pattern binder adhesive and leave unbonded aggregate particles in the mold and removing the aggregate particles from the mold to leave a mold cavity that faithfully defines the pattern shape.
摘要翻译： 通过使用包含可溶于超临界二氧化碳的主要成分的粘合剂形成粘合的骨料颗粒的铸造图案，可以有利地制造原型金属铸件等的模具; 围绕不受超临界二氧化碳影响的材料图案形成刚性壳模; 然后将图案和模具组合暴露于超临界二氧化碳以除去图案粘合剂粘合剂并且将未结合的聚集体颗粒留在模具中并从模具中除去聚集颗粒以留下忠实地限定图案形状的模腔。
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公开(公告)号：US06447593B1
公开(公告)日：2002-09-10
申请号：US09832469
申请日：2001-04-12
申请人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai
发明人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai
IPC分类号： B22C902
CPC分类号： B22C1/2293 , B22C1/02 , B22C9/046 , B22C9/10 , B22C9/123
摘要： Coating foundry sand with a thin layer of an oxidation-promoting catalyst. Preferred catalysts comprise ferric and cupric oxides. The catalysts promote the oxidation of any polymeric binder or residues admixed with the sand. The sand is coated by wetting the grains with a solution of a catalyst precursor, drying the sand and baking the sand in air to convert the precursor to the catalyst.
摘要翻译： 涂层铸造砂与薄层的氧化促进催化剂。 优选的催化剂包括三价铁和氧化铜。 催化剂促进与砂混合的任何聚合物粘合剂或残余物的氧化。 通过用催化剂前体的溶液润湿颗粒来涂覆沙子，干燥砂子并在空气中烘烤砂子以将前体转化为催化剂。
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公开(公告)号：US06920911B2
公开(公告)日：2005-07-26
申请号：US10704082
申请日：2003-11-07
申请人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai
发明人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai
CPC分类号： B22C1/2293 , B22C1/02 , B22C9/046 , B22C9/10 , B22C9/123
摘要： Sand mold for shaping molten metal cast into the mold. The mold includes sand, a thermally oxidizable polymer amongst the grains of the sand, and a catalyst coating on the gains for promoting the thermal oxidation and breakdown of the polymer in the course of removing the sand from the casting and/or reclaiming the sand for reuse. The catalyst coating adheres so tenaciously to the grains of sand that the sand can withstand repeated casting and sand reclamation cycles without the need to replenish the catalyst.
摘要翻译： 用于成型熔融金属的模具铸造成模具。 该模具包括沙子，砂粒之间的可热氧化聚合物，以及用于在从铸件中除去砂和/或回收砂的过程中促进聚合物的热氧化和分解的增益上的催化剂涂层 重用。 催化剂涂层如此牢固地粘附到砂粒上，砂可以承受反复铸造和回砂循环，而不需要补充催化剂。
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公开(公告)号：US06673141B2
公开(公告)日：2004-01-06
申请号：US10208616
申请日：2002-07-30
申请人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai
发明人： Nicholas Edward Sargent , June-Sang Siak , Mei Cai
IPC分类号： B28B736
CPC分类号： B22C1/2293 , B22C1/02 , B22C9/046 , B22C9/10 , B22C9/123
摘要： Coating foundry sand with a thin layer of an oxidation-promoting catalyst. Preferred catalysts comprise ferric and cupric oxides. The catalysts promote the oxidation of any polymeric binder or residues admixed with the sand. The sand is coated by wetting the grains with a solution of a catalyst precursor, drying the sand and baking the sand in air to convert the precursor to the catalyst.
摘要翻译： 涂层铸造砂与薄层的氧化促进催化剂。 优选的催化剂包括三价铁和氧化铜。 催化剂促进与砂混合的任何聚合物粘合剂或残余物的氧化。 通过用催化剂前体的溶液润湿颗粒来涂覆沙子，干燥砂子并在空气中烘烤砂子以将前体转化为催化剂。
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公开(公告)号：US06843303B2
公开(公告)日：2005-01-18
申请号：US10358133
申请日：2003-02-04
申请人： June-Sang Siak , Gordon Alwin Tooley , Mei Cai , Richard Michael Schreck , William Thomas Whited
发明人： June-Sang Siak , Gordon Alwin Tooley , Mei Cai , Richard Michael Schreck , William Thomas Whited
摘要： A method for making sand particle foundry mold members. Sand particles are coated with an aqueous dispersion of a suitable binder material such as a gelatin gel. The moist gelatin coated particles are gravity fed into a pattern box for the mold member and subjected to multi-axis vibration to pack the sand in the pattern box. The moist sand is then heated with radio frequency energy to promote binder flow to the corners of the particles, and air flow is initiated to transport water from the mass of particles to harden the mass of particles into the mold member.
摘要翻译： 砂粒铸造模具制造方法。 砂颗粒用合适的粘合剂材料如明胶凝胶的水分散体涂覆。 将潮湿的明胶涂覆的颗粒重力加入用于模具构件的图案盒中，并经受多轴振动以将图案盒中的沙包装。 然后用射频能量加热潮湿的砂，以促进粘合剂流到颗粒的角落，并且启动空气流以从颗粒物质输送水以将颗粒的质量硬化到模具构件中。
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公开(公告)号：US5837373A
公开(公告)日：1998-11-17
申请号：US666178
申请日：1996-06-19
CPC分类号： B22C1/2293 , Y10T428/2993 , Y10T428/2998
摘要： A foundry mold member made from a plurality of sand particles bound together with a binder which is concentrated at the contact points between contiguous sand particles and consists essentially of gelatins having a Bloom rating less than about 175 Bloom grams. The sand particles are first coated with a sol of the gelatin, cooled to ambient temperature and conditioned to a prescribed water content necessary to effect migration of the gelatin to the interparticle contact points upon heating of the coated particles in a pattern mold.
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公开(公告)号：US06845810B2
公开(公告)日：2005-01-25
申请号：US10269659
申请日：2002-10-11
摘要： Apparatus for the gravity-cast, “lost-foam” casting of metal castings, including a fugitive, pyrolizable foam pattern forming a casting cavity in a bed of loose sand, and a hollow sprue for supplying melt to the casting cavity, wherein the sprue consists essentially of the same metal as is being cast. A high-temperature, porous vent is provided adjacent the discharge end of the metal sprue to expel air from the sprue that would otherwise be trapped therein.
摘要翻译： 用于金属铸件的重力铸造“失去泡沫”铸造的装置，包括在松散砂床中形成铸造腔的逸出的可热膨胀的泡沫图案，以及用于将熔体供应到铸造腔的中空浇道，其中浇道 基本上由与铸件相同的金属组成。 在金属浇道的排出端附近设置高温多孔的排气口，以排出否则将被截留在其中的浇口的空气。
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9.发明授权Lost foam casting apparatus for reducing porosity and inclusions in metal castings 失效用于减少金属铸件中孔隙率和夹杂物的失水泡沫铸造设备公开(公告)号：US06619373B1
公开(公告)日：2003-09-16
申请号：US10132878
申请日：2002-04-25
IPC分类号： B22C908
摘要： Apparatus for the gravity-cast, bottom-fill, “lost foam” casting of metal castings, including a fugitive, pyrolizable pattern (for forming a casting cavity), and a hollow sprue (for conducting melt to the casting cavity) embedded in a bed of loose sand. The sprue is free from pyrolyzable foam and conducts melt from above the pattern to a gating system supplying melt to the pattern. The sprue is constructed so as to cause the melt to approach the gating system from beneath and keep any pyrolysis products from entering the sprue.
摘要翻译： 用于重力铸造，底部填充的“失去泡沫”铸造金属铸件的装置，包括一个易燃的可热化图案（用于形成铸造腔体）和一个嵌入在一个铸造腔中的中空浇道（用于将熔体导入铸造腔） 松沙床。 浇口不含可热解的泡沫，并且从图案上方引导熔体到向熔体提供图案的浇注系统。 浇口被构造成使得熔体从下方接近浇注系统，并保持任何热解产物不会进入浇口。
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公开(公告)号：US5582231A
公开(公告)日：1996-12-10
申请号：US431923
申请日：1995-04-28
CPC分类号： B22C1/2293 , Y10T428/2993 , Y10T428/2998
摘要： A foundry mold member made from a plurality of sand particles bound together with a binder which is concentrated at the contact points between contiguous sand particles and consists essentially of gelatins having a Bloom rating less than about 175 Bloom grams. The sand particles are first coated with a sol of the gelatin, cooled to ambient temperature and conditioned to a prescribed water content necessary to effect migration of the gelatin to the interparticle contact points upon heating of the coated particles in a pattern mold.
摘要翻译： 由多个与颗粒结合在一起的粘结剂制成的铸造模具构件，该粘结剂被浓缩在相邻的砂粒之间的接触点处，并且基本上由Bloom等级低于约175 Bloom克的明胶组成。 砂颗粒首先用明胶溶胶涂覆，冷却至环境温度，并调节至在图案模具中加热涂覆颗粒时使明胶迁移到颗粒间接触点所需的规定水含量。
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