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1. 发明授权

US4308191A Foundry sand mixes with improved bench life for curing with sulfur dioxide or other oxidizable gaseous catalysts 失效
标题翻译：铸造砂混合物具有改善的工作寿命，可用二氧化硫或其他可氧化气体催化剂固化
公开(公告)号：US4308191A
公开(公告)日：1981-12-29
申请号：US123877
申请日：1980-02-25
申请人： Robert H. Fox , Roger H. Kottke , James E. Menting , R. Bruce Sampsell
发明人： Robert H. Fox , Roger H. Kottke , James E. Menting , R. Bruce Sampsell
IPC分类号： B22C1/22 , B22C9/02 , C08K3/32 , C08L71/06
CPC分类号： B22C1/224
摘要： Foundry sand mixes comprising a mixture of sand, binder, and hydrogen peroxide are improved with respect to bench life by the addition thereto, at the time of initial preparation of the mixture, of non-catalyzing amounts, but stabilizing amounts, of certain iron chelating agents which are acid or salts of acids selected from those which, in their free acid form, have an acidic pH less than 3.0 when dissolved at 1 percent weight per weight in water or when saturated in water, whichever is lower in concentration.
摘要翻译：包含砂，粘合剂和过氧化氢的混合物的铸造砂混合物在初始制备混合物时相对于工作台寿命得到改善，非催化量，但稳定量的某些铁螯合作为酸或酸的盐，选自以游离酸形式在水中以1重量％的重量或当在水中饱和时溶解的酸性pH低于3.0的那些酸，其浓度较低者。

2. 发明授权

US3934809A Slitted flexible mold 失效
标题翻译：分切柔性模具
公开(公告)号：US3934809A
公开(公告)日：1976-01-27
申请号：US529335
申请日：1974-12-04
申请人： Robert H. Fox , Robert J. Henning , Miroslav Psensky
发明人： Robert H. Fox , Robert J. Henning , Miroslav Psensky
IPC分类号： B28B7/06 , B28B7/20
CPC分类号： B28B7/06 , B28B7/20 , Y10S425/044
摘要： A flexible distensible mold for use in fabricating art forms and utilitarian articles, and for use with the aid of air pressure differential enlargment of the shaping cavity, is provided with closeable slits extending from at least portions of the shaping cavity partly into the mold wall. With these improved molds the withdrawalbore of the shaping cavity can be greatly enlarged, and the side walls can be greatly extended with lower air pressure differentials than would be otherwise necessary.
摘要翻译：提供用于制造艺术形式和功利用品的柔性可扩张模具，并且借助于成形腔的气压差分扩大使用，具有从成形腔的至少部分部分地延伸到模具壁中的可闭合狭缝。通过这些改进的模具，可以大大扩大成形腔的脱落孔，并且可以以比其他必要的更低的空气压力差大大地延伸侧壁。

3. 发明授权

US3937438A Flexible mold with hinged slits 失效
标题翻译：具有铰链缝的柔性模具
公开(公告)号：US3937438A
公开(公告)日：1976-02-10
申请号：US529333
申请日：1974-12-04
申请人： Robert H. Fox , Robert J. Henning , Robert F. Morgan, Jr.
发明人： Robert H. Fox , Robert J. Henning , Robert F. Morgan, Jr.
IPC分类号： B28B7/06 , B28B7/20
CPC分类号： B28B7/06 , B28B7/20 , Y10S425/044
摘要： A flexible, distensible mold for use in fabricating art forms and utilitarian articles, and for use with the aid of air pressure differential enlargement of the shaping cavity, is provided with closeable slits extending from at least a portion of the shaping cavity partly into the mold wall, and cooperating slits extending from the outer wall of the mold into a position which is adjacent to and overlapping the internal slits. With these improved molds a withdrawal bore of the shaping cavity can be greatly enlarged and the side walls can be greatly extended with lower air pressure differentials than would be otherwise necessary. This invention provides a hinging action in the expansion of the side wall which utilizes the flexibility of the mold material to expand the withdrawal bore.
摘要翻译：提供用于制造艺术形式和功利用品的柔性的，可扩张的模具，并且借助于成型腔的气压差异扩大使用的可模制的模具设置有可从狭缝部分的至少一部分延伸到模具壁和配合的狭缝从模具的外壁延伸到与内部狭缝相邻并重叠的位置。利用这些改进的模具，可以大大增加成形腔的抽出孔，并且可以以比其他必要的更低的空气压力差大大地延长侧壁。本发明提供了侧壁膨胀中的铰接作用，其利用模具材料的柔性来扩大抽出孔。

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