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公开(公告)号：EP1913293A1
公开(公告)日：2008-04-23
申请号：EP06775083.6
申请日：2006-08-09
申请人： STACKPOLE LIMITED
发明人： COZENS, Eric , MORTON, Paul
CPC分类号： F04B49/03 , F16K17/044 , F16K17/065 , F16K17/164 , Y10T137/7846
摘要： A dual plunger valve having nested inner and outer plungers seated within a bore in the valve housing. The valve housing has an inlet port and an outlet port fluidly connected by the bore and sealed from one another by the plungers which are biased towards respective sealing surfaces by a pair of nested biasing elements located between the inlet port and the outlet port. The outer plunger is slidable within the bore and has a lip extending inwardly therefrom. The inner plunger is slidable within the outer plunger between a sealed position and a second position wherein it is in contact with the lip. Pressure in the inlet port which is high enough to overcome the force of the biasing elements causes the inner plunger to slide within the outer plunger to its second position wherein the outer plunger will then begin to slide within the bore to remove the seal between the inlet port and the outlet port.
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公开(公告)号：EP1210193B1
公开(公告)日：2003-05-28
申请号：EP00951166.8
申请日：2000-08-11
申请人： STACKPOLE LIMITED
发明人： HINZMANN, Gerd
IPC分类号： B22F5/00
摘要： A multiple-acting powder metal press is disclosed for making green form double helical gear compacts. The press has inner and outer lower punches (1082, 1084), and an upper, outer punch (1026). The upper and lower outer punches have left hand and right hand external helical profiles as chosen to produce a desired helical gear. The punches co-operate with left hand and right hand helical dies (1024) carried by the press about the punches. The helical faces require that the dies rotate relative to the punches during operation. A cam and roller mechanism may drive this rotation. The compact forming process commences with an open position in which powder is introduced to a vacant lower die cavity. The upper portions of the press advance downward to close the cavity. All parts of the press except the lower inner, or transfer, punch then move downward at the same speed to transfer powder to the extremities of the cavity. When transfer is complete both lower punches may be stopped, while the upper punches continue to advance. The dies advance at half the speed of the upper punches, rotating partially as they do so. Once the powder reaches its compacted density the upper and lower punches cease motion, but the dies continue to turn, separating themselves and compressed part. Finally the part is ejected and the press returns to the initial condition.
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公开(公告)号：EP0909228B1
公开(公告)日：2001-10-17
申请号：EP97917969.4
申请日：1997-05-09
申请人： STACKPOLE LIMITED
发明人： HINZMANN, Gerd
IPC分类号： B22F5/08
摘要： A multiply-acting powder metal press is disclosed for making green form double helical gear compacts. The press has inner and outer lower punches, and an upper, outer punch. The upper and lower outer punches have left hand and right hand external helical profiles as chosen to produce a desired helical gear. The punches co-operate with left hand and right hand helical dies carried by the press about the punches. The helical faces require that the dies rotate relative to the punches during operation. A cam and roller mechanism may drive this rotation. The compact forming process commences with an open position in which powder is introduced to a vacant lower die cavity. The upper portions of the press advance downward to close the cavity. All parts of the press except the lower inner, or transfer, punch then move downward at the same speed to transfer powder to the extremities of the cavity. When transfer is complete both lower punches may be stopped, while the upper punches continue to advance. The dies advance at half the speed of the upper punches, rotating partially as they do so. Once the powder reaches its compacted density the upper and lower punches cease motion, but their dies continue to turn, separating themselves and compressed part. Finally, the part is ejected and the press returns to the initial condition.
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公开(公告)号：EP0626893B1
公开(公告)日：2000-08-09
申请号：EP93900062.6
申请日：1992-12-21
申请人： STACKPOLE Limited
CPC分类号： C22C33/0264 , B22F2003/166 , B22F2998/00 , B22F2999/00 , C22C33/0207 , F16C33/14 , F16C2220/20 , F16C2220/70 , F16C7/023 , B22F3/1109 , B22F3/16 , B22F3/18
摘要： A method of producing bearing surfaces from powder metal blanks comprising: blending carbon and ferro alloys and lubricant with compressible elemental iron powder, pressing the blending mixture to form the powder metal blank, high temperature sintering the blank in a reducing atmosphere, compressing the powder metal blanks so as to produce a densified layer having a bearing surface, and then heat treating the densified layer.
摘要翻译： 一种从粉末金属坯料制造轴承表面的方法，包括：将碳和铁合金和润滑剂与可压缩的元素铁粉混合，压制混合物以形成粉末金属坯料，在还原气氛中高温烧结坯料，压制粉末金属 坯料，以产生具有支承表面的致密层，然后热处理致密层。
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5.发明公开MAKING METAL POWDER ARTICLES BY SINTERING, SPHEROIDIZING AND WARM FORMING 失效金属粉末体烧结，球化和温暖的变形PRODUCTION
公开(公告)号：EP0917593A1
公开(公告)日：1999-05-26
申请号：EP97919232.0
申请日：1997-05-02
申请人： STACKPOLE LIMITED
发明人： SHIVANATH, Rohith , JONES, Peter
CPC分类号： C22C33/0264 , B22F2003/023 , B22F2003/166 , B22F2003/248 , B22F2998/10 , C21D1/32 , C21D7/00 , C21D9/32 , C22C33/02 , B22F3/10 , B22F3/18 , B22F3/24
摘要： A method of making a sintered article of powder metal having a carbon composition in the range of about 0.8 % to 2.0 % by weight, then shperoidizing the sintered article and then warm forming the sintered article at a temperature between 250 and 700 °C for a time duration selected to form the article to a final shape.
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公开(公告)号：EP0680405B1
公开(公告)日：1999-08-04
申请号：EP94900676.1
申请日：1993-11-24
申请人： STACKPOLE LIMITED
发明人： HINZMANN, Gerd , HAIKO, Mark , MA, Frank , WILSON, Allan , BUCKLEY-GOLDER, Keith , ROUND, Robert
CPC分类号： B22F3/03 , B30B11/02 , Y10S425/058
摘要： This invention relates to a device to compact parts with an undercut out of powder metal, including a pair of dies linearly moveable relative to one another and then phased, and an associated linearly displaceable pair of punches to produce said parts with said undercut.
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公开(公告)号：EP0909228A1
公开(公告)日：1999-04-21
申请号：EP97917969.0
申请日：1997-05-09
申请人： STACKPOLE LIMITED
发明人： HINZMANN, Gerd
摘要： A multiply-acting powder metal press is disclosed for making green form double helical gear compacts. The press has inner and outer lower punches, and an upper, outer punch. The upper and lower outer punches have left hand and right hand external helical profiles as chosen to produce a desired helical gear. The punches co-operate with left hand and right hand helical dies carried by the press about the punches. The helical faces require that the dies rotate relative to the punches during operation. A cam and roller mechanism may drive this rotation. The compact forming process commences with an open position in which powder is introduced to a vacant lower die cavity. The upper portions of the press advance downward to close the cavity. All parts of the press except the lower inner, or transfer, punch then move downward at the same speed to transfer powder to the extremities of the cavity. When transfer is complete both lower punches may be stopped, while the upper punches continue to advance. The dies advance at half the speed of the upper punches, rotating partially as they do so. Once the powder reaches its compacted density the upper and lower punches cease motion, but their dies continue to turn, separating themselves and compressed part. Finally, the part is ejected and the press returns to the initial condition.
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8.发明公开
公开(公告)号：EP0835329A1
公开(公告)日：1998-04-15
申请号：EP95923157.0
申请日：1995-06-29
申请人： STACKPOLE LIMITED
CPC分类号： C22C33/0264 , B22F2998/00 , C21D1/32 , C22C33/02 , F16C7/023
摘要： This invention relates to a process of forming a sintered article of powder metal comprising blending graphite and lubricant with a pre-alloyed iron based powder, pressing said blended mixture to shape in a single compaction stage, sintering said article, and then high temperature sintering said article in a reducing atmosphere to produce a sintered article having a density greater than 7.4 g/cc.
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公开(公告)号：EP0680405A1
公开(公告)日：1995-11-08
申请号：EP94900676.0
申请日：1993-11-24
申请人： STACKPOLE LIMITED
发明人： HINZMANN, Gerd , HAIKO, Mark , MA, Frank , WILSON, Allan , BUCKLEY-GOLDER, Keith , ROUND, Robert
CPC分类号： B22F3/03 , B30B11/02 , Y10S425/058
摘要： This invention relates to a device to compact parts with an undercut out of powder metal, including a pair of dies linearly moveable relative to one another and then phased, and an associated linearly displaceable pair of punches to produce said parts with said undercut.
摘要翻译： 本发明涉及一种用粉末金属切削零件的装置，该装置包括一对相对于彼此可线性移动并随后相位移动的模具，以及相关的可线性移动的一对冲头以产生具有所述底切的所述部件。
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公开(公告)号：EP0627018A1
公开(公告)日：1994-12-07
申请号：EP93900061.0
申请日：1992-12-21
申请人： STACKPOLE Limited
发明人： JONES, Peter , LAWCOCK, Roger
CPC分类号： C22C33/0207
摘要： Un procédé de matriçage d'articles frittés à base de poudres métalliques, comprend: le mélange de carbone, de ferromanganèse, et d'un lubrifiant avec une poudre de fer élémentaire compressible, le pressage du mélange ainsi réalisé pour former des articles, le frittage à haute température des articles en atmosphère réductrice et le matriçage des articles frittés à leur forme finale afin de réduire la variabilité de tolérance des articles matricés et d'éliminer pratiquement toutes les opérations secondaires.
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