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1.发明授权Evaporable foam pattern for casting an engine block of a two-cycle engine 失效用于铸造双循环发动机的发动机缸体的可蒸发泡沫图案
公开(公告)号：US4951733A
公开(公告)日：1990-08-28
申请号：US226122
申请日：1989-02-13
CPC分类号： B22C7/023 , F02B2075/025
摘要： The assembled evaporable pattern, which is substantially identical in shape to the cast metal two-cycle engine block, includes a plurality of in-line cylinders each having an end open to the crankcase end of the pattern. Each cylinder includes an exhaust passage that communicates with an exhaust manifold that extends to the exterior of the pattern and each cylinder has at least one longitudinally extending transfer passage. The assembled pattern also includes cooling passages that surround each cylinder, as well as surrounding the exhaust manifold passage. The foam pattern is composed of a plurality of separate foam sections joined together by an adhesive along planar interfaces. A first of the sections extends from the crankcase end of the pattern to the lower end of the transfer passages, and a second section extends from the lower end of the transfer passages to a location intersecting the exhaust passages of the cylinders. A third section extends from the exhaust passages to the cylinder heads. In addition, a fourth pattern section encloses the water passages at the head end of the block, while a fifth section encloses the water passage that borders the exhaust manifold.
摘要翻译： 与铸造金属二冲程发动机缸体基本上相同的组装的蒸发图案包括多个在线气缸，每个气缸具有一个通向图案曲轴箱端的端部。 每个气缸包括排气通道，该排气通道与延伸到图案外部的排气歧管连通，并且每个气缸具有至少一个纵向延伸的传送通道。 组装的图案还包括围绕每个气缸的冷却通道以及围绕排气歧管通道。 泡沫图案由通过粘合剂沿平面界面连接在一起的多个单独的泡沫部分组成。 第一部分从图案的曲轴箱端延伸到传送通道的下端，第二部分从传送通道的下端延伸到与气缸的排气通道相交的位置。 第三部分从排气通道延伸到气缸盖。 此外，第四图案部分封闭在块的头端处的水通道，而第五部分封闭与排气歧管相邻的水通道。
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公开(公告)号：US4969504A
公开(公告)日：1990-11-13
申请号：US383919
申请日：1989-07-21
IPC分类号： B22D19/00
CPC分类号： B22D19/0009
摘要： An evaporable foam pattern for casting a metal water-cooled exhaust manifold for an internal combustion engine. The assembled pattern is formed of an evaporable foam polymeric material, such as polystyrene, and includes an inner exhaust conduit composed of a generally upright body portion and a generally curved elbow portion. The body portion is provided with a plurality of inlet ports connected to the exhaust passages of a bank of cylinders, while the elbow portion defines a downwardly facing outlet. The pattern also includes an outer water jacket which is spaced from the exhaust conduit to provide a water passage therebetween. Both the exhaust conduit and the outer jacket are composed of two longitudinally split halves or sections having abutting edges, and the abutting edges are joined together by an adhesive. Spacing ribs interconnect the inner surface of the jacket and the outer surface of the exhaust conduit to space the sections apart. The inlet ports of the exhaust conduit section are located only in one of the exhaust conduit pattern sections.
摘要翻译： 一种用于铸造用于内燃机的金属水冷式排气歧管的可蒸发泡沫图案。 组装的图案由诸如聚苯乙烯的可蒸发泡沫聚合物材料形成，并且包括由大致直立的主体部分和大致弯曲的弯头部分组成的内部排气导管。 主体部分设置有连接到一组气缸的排气通道的多个入口，而肘部限定向下的出口。 该图案还包括与排气导管间隔开以在其间提供水通道的外部水套。 排气导管和外护套均由具有邻接边缘的两个纵向分开的半部或部分组成，并且邻接边缘通过粘合剂连接在一起。 间隔肋将护套的内表面和排气导管的外表面相互连接，以使部分间隔开。 排气管道部分的入口仅位于排气管道图案部分之一中。
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公开(公告)号：US4964454A
公开(公告)日：1990-10-23
申请号：US281187
申请日：1988-12-07
CPC分类号： B22C7/023 , F02B61/045
摘要： An evaporable foam pattern for casting a metal air induction manifold for an internal combustion engine. The pattern is formed from an evaporable foam material, such as polystyrene, and in the assembled condition the pattern is in the form of an elongated body member having a generally rectangular cross section. One end of the body member is enclosed by an end wall while the opposite end of the body member is open. One of the side walls of the body member is provided with a plurality of generally parallel slots which are elongated in a lateral direction with respect to the longitudinal axis of the body member. The pattern is composed of a pair of longitudinal pattern sections each being generally U-shaped in cross section and having abutting edges disposed on a parting line. An adhesive joins the abutting edges. The parting line between the pattern section splits the opening in the end of the body member and all of the slots are formed in one pattern section.
摘要翻译： 一种用于铸造用于内燃机的金属空气进气歧管的可蒸发泡沫图案。 该图案由诸如聚苯乙烯的可蒸发泡沫材料形成，并且在组装状态下，图案是具有大致矩形横截面的细长主体构件的形式。 主体构件的一端由端壁封闭，同时主体构件的相对端部敞开。 身体构件的一个侧壁设置有多个大致平行的狭槽，其相对于主体构件的纵向轴线在横向方向上伸长。 图案由一对纵向图形部分组成，每个纵向图形部分的横截面大致为U形，并且具有设置在分型线上的邻接边缘。 粘合剂接合邻接边缘。 图案部分之间的分隔线将主体部件的端部中的开口分开，并且所有狭槽形成在一个图案部分中。
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公开(公告)号：US4907638A
公开(公告)日：1990-03-13
申请号：US281171
申请日：1988-12-07
IPC分类号： B22C7/02
CPC分类号： B22C7/026
摘要： An evaporable foam pattern for producing a cast metal head for a multiple cylinder engine. The assembled pattern includes an elongated block of evaporable foam material having opposed inner and outer faces. A plurality of generally circular head recesses are formed in the inner face and define the cylinder heads in the metal casting. The block is also formed with an internal passage including a group of annular chambers that surround the head recesses and channels interconnect adjacent chambers. The block also has an inlet which communicates with one end of the internal passage and an outlet that communicates with the opposite end of the passage. The pattern is composed of a pair of longitudinal pattern sections having abutted edges that are joined together by an adhesive. The heads, as well as the inlet and outlet, are located in one of the pattern sections, while the two sections in combination define the internal passage.
摘要翻译： 一种用于生产用于多缸发动机的铸造金属头的可蒸发泡沫图案。 组装图案包括具有相对的内表面和外表面的可蒸发泡沫材料的细长块。 在内表面上形成多个大致圆形的头部凹槽，并且在金属铸件中限定气缸盖。 该块还形成有内部通道，该内部通道包括围绕头部凹槽的一组环形腔和相互连接的腔室的通道。 该块还具有与内部通道的一端连通的入口和与通道的相对端连通的出口。 图案由一对具有通过粘合剂连接在一起的邻接边缘的纵向图案部分组成。 头部以及入口和出口位于一个图案部分中，而两个部分组合地限定内部通道。
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公开(公告)号：US4721149A
公开(公告)日：1988-01-26
申请号：US15744
申请日：1987-02-17
摘要： A lost foam casting system (2) includes a sprue (8) have a receiving portion (56) for receiving molten metal (14) from a source (16), a distribution portion (58) with a plurality of radial fingers (59-62) for distributing the molten metal (14) radially outwardly, and a lower section (63) having a plurality of feed passages (35-38) receiving molten metal (14) from the respective radial fingers (59-62) and interconnected by thin flat support walls (39-42) providing a relatively rigid structure. Workpieces (18 and 20) and in-gates (23-25 and 26-28) are connected to the flat exterior surfaces (39 and 41) of the lower section (63) of the sprue (8) and fed with molten metal (14) from respective feed passages. The structure provides pattern assembly rigidity, excellent dimensional control, high casting yield, high ratio of casting weight to gating/sprue weight, high surface area to volume ratio facilitating escape of vapor and organic effluents, ease of pattern attchment by large outer flat sprue surfaces, accessibility of casting for ease in removal from the sprue, low total volume for reduction of buoyancy, and faster metal fill rates and faster cooling.
摘要翻译： 一种失物泡沫浇注系统（2）包括具有用于从源（16）接收熔融金属（14）的接收部分（56）的浇道（8），具有多个径向指状物（59-）的分配部分（58） 62），用于径向向外分配熔融金属（14）;以及下部（63），其具有从各个径向指状物（59-62）接收熔融金属（14）的多个供给通道（35-38），并由 薄的平坦支撑壁（39-42）提供相对刚性的结构。 工件（18和20）和入口（23-25和26-28）连接到浇道（8）的下部（63）的平坦外表面（39和41）上，并且供给熔融金属 14）。 该结构提供图案组装刚性，优异的尺寸控制，高铸造产量，浇注重量与浇口/浇道重量的高比例，高表面积与体积比有助于蒸气和有机流出物的逸出，易于通过大的外部扁平浇道表面 ，铸件易于从浇注道移除，总体积小，减少浮力，以及更快的金属填充率和更快的冷却。
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