公开(公告)号：US06326429B1

公开(公告)日：2001-12-04

申请号：US09366804

申请日：1999-08-04

申请人： David Howard Sturgis ,  Mehrdad Yasrebi ,  Karl Milton Taft, III ,  Michael Gerald Sorbel

发明人： David Howard Sturgis ,  Mehrdad Yasrebi ,  Karl Milton Taft, III ,  Michael Gerald Sorbel

IPC分类号： C08K501

CPC分类号： C08K5/01 ,  B22C7/02 ,  C08L69/00

摘要： Wax compositions that are useful, amongst other things, for forming investment casting patterns are described. One embodiment of the wax composition comprises: (a) pattern wax; and (b) from about 1% to about 85% by weight of a polymeric organic carbonate filler material. Examples of particular polymeric organic carbonate filler materials include, without limitation, polyethylene carbonate, polypropylene carbonate, poly(cyclohexane carbonate), poly(cyclohexane propylene carbonate), and mixtures thereof. Crosslinking the organic portion of the polymeric organic carbonate filler material can substantially reduce its thermal expansion. The wax compositions generally include other materials commonly used to form wax compositions. Such materials include waxes and resinous materials, conventional fillers, ultra-violet curable monomers, plasticizers, lubricants, and mixtures thereof. Conventional fillers, including urea, can be copolymerized with the polymeric organic carbonate filler material to reduce the dissolution and/or agglomeration of the filler. Wax patterns useful for forming investment casting molds are then made from such compositions using conventional techniques, such as injection molding. The patterns are serially immersed in slurries comprising refractory materials to form casting molds. Metal and metal alloy articles are then cast using such molds.

摘要翻译： 描述了用于形成熔模铸造图案的蜡组合物。 蜡组合物的一个实施方案包括：（a）图案蜡; 和（b）约1％至约85％重量的聚合有机碳酸酯填料。 特定的聚合有机碳酸酯填料材料的实例包括但不限于聚碳酸亚乙酯，聚碳酸亚丙酯，聚（环己烷碳酸酯），聚（环己烷碳酸亚丙酯）及其混合物。 交联聚合有机碳酸酯填料的有机部分可以显着降低其热膨胀。 蜡组合物通常包括通常用于形成蜡组合物的其它材料。 这些材料包括蜡和树脂材料，常规填料，紫外线固化性单体，增塑剂，润滑剂及其混合物。 常规的填料，包括尿素，可与聚合有机碳酸酯填料共聚，以减少填料的溶解和/或附聚。 然后使用常规技术（例如注塑）从这样的组合物制备用于形成熔模铸造模具的蜡图案。 将图案串联浸入包含耐火材料的浆料中以形成铸模。 然后使用这种模具铸造金属和金属合金制品。

公开(公告)号：US06390179B1

公开(公告)日：2002-05-21

申请号：US09710545

申请日：2000-11-08

申请人： Mehrdad Yasrebi ,  Karl Milton Taft, III ,  David Howard Sturgis ,  Michael Gerald Sorbel ,  Mark E. Springgate ,  Douglas Gene Nikolas

发明人： Mehrdad Yasrebi ,  Karl Milton Taft, III ,  David Howard Sturgis ,  Michael Gerald Sorbel ,  Mark E. Springgate ,  Douglas Gene Nikolas

IPC分类号： B22C900

CPC分类号： C04B35/111 ,  C04B35/505 ,  C04B35/624 ,  C04B35/6264 ,  C04B35/62645 ,  C04B35/62655 ,  C04B35/6303 ,  C04B35/6316 ,  C04B2235/3225 ,  C04B2235/6027

摘要： Methods for increasing the lifetime of a casting slurry are described. One feature of the invention is processing refractory powders at a first hydration level to produce powders having a second, lower hydration level before the processed materials are used to form casting slurries. Processing according to the disclosed methods results in a substantial increase in the lifetime of a slurry made using such processed materials compared to slurries made using materials not processed as described herein. One embodiment of the method comprises heat processing at least one refractory powder, typically refractory powders which have undergone hydration subsequent to commercial production, for a period of time sufficient to reduce the amount of hydration from a first hydration level to a second hydration level. A slurry is formed using the refractory powder at an hydration level which provides an increased slurry lifetime relative to the same material without processing according to the method of the present invention. Slurry formation can be accomplished substantially immediately after processing, or up to about one week after processing, typically less than 24 hours after processing, and even more typically within 2 hours to about 8 hours after processing.

摘要翻译： 描述了提高铸造浆料寿命的方法。 本发明的一个特征是在第一水合水平下加工难熔粉末，以在加工的材料用于形成浇注浆料之前产生具有第二较低水化水平的粉末。 根据所公开的方法的加工，与使用如本文所述未加工的材料制成的浆料相比，导致使用这种加工材料制成的浆料的使用寿命显着增加。 该方法的一个实施方案包括热处理至少一种耐火粉末，通常在商业生产后经历水合的耐火粉末足以将水合量从第一水合水平降低至第二水化水平。 使用难熔粉末以水合水平形成浆料，其相对于相同的材料提供了增加的浆料寿命，而不是根据本发明的方法进行处理。 浆料形成可以在加工之后基本上立即完成，或者在加工之后至多约一周，通常在加工后通常小于24小时，甚至更通常在加工后2小时至约8小时内完成。

公开(公告)号：US06920913B2

公开(公告)日：2005-07-26

申请号：US10431881

申请日：2003-05-07

申请人： Mehrdad Yasrebi ,  Karl Milton Taft, III ,  David Howard Sturgis ,  Michael Gerald Sorbel ,  Mark E. Springgate ,  Douglas Gene Nikolas

发明人： Mehrdad Yasrebi ,  Karl Milton Taft, III ,  David Howard Sturgis ,  Michael Gerald Sorbel ,  Mark E. Springgate ,  Douglas Gene Nikolas

IPC分类号： B22C20060101 ,  B22C1/02 ,  B22C1/22 ,  B22C9/00 ,  B22C9/04 ,  B22C11/00 ,  B28B7/34 ,  B28B7/36

CPC分类号： C04B35/111 ,  C04B35/505 ,  C04B35/624 ,  C04B35/6264 ,  C04B35/62645 ,  C04B35/62655 ,  C04B35/6303 ,  C04B35/6316 ,  C04B2235/3225 ,  C04B2235/6027

摘要： Embodiments of a method for increasing the lifetime of a casting slurry are described. One feature of the disclosed embodiments comprises processing refractory materials that are used to form casting slurries to provide a substantial increase in slurry lifetime for slurries made using such processed materials compared to slurries made using materials not processed as described herein. One embodiment of the method comprises heat processing at least one refractory powder. Without limiting the invention to a theory of operation, processing is continued for a period of time sufficient to reduce the amount of hydration from a first hydration level to a second hydration level. A slurry is formed using the refractory powder at a hydration level which provides an increased slurry lifetime relative to the same material without processing according to the disclosed embodiments.

摘要翻译： 描述了用于提高铸造浆料的寿命的方法的实施例。 所公开的实施方案的一个特征包括加工用于形成浇注浆料的耐火材料，以提供使用这种加工材料制备的浆料的浆料寿命的显着增加，与使用如本文所述未加工的材料制成的浆料相比。 该方法的一个实施方案包括热处理至少一种耐火粉末。 在不将本发明限于操作理论的情况下，继续处理足以将水合量从第一水合水平降低到第二水化水平的时间。 使用难熔粉末以水合水平形成浆料，其相对于相同的材料提供了增加的浆料寿命，而根据所公开的实施方案不进行处理。