Investment casting

http://dbpedia.org/resource/Investment_casting

Feingießen ist ein Gießverfahren, mittels dessen auch kleine und kleinste Gussteile formgetreu und bei minimierter Nachbearbeitung hergestellt werden können. Feingießen ist zum Teil dem Wachsausschmelzverfahren ähnlich, bei dem sowohl das Modell, meist aus Wachs oder Kunststoff bestehend, als auch die Form nach dem Guss nicht mehr vorhanden sind. rdf:langString
インベストメント鋳造(インベストメントちゅうぞう、英語: investment casting)とは、工業プロセスにおける鋳造方法のひとつ。 rdf:langString
Investment casting is an industrial process based on lost-wax casting, one of the oldest known metal-forming techniques. The term "lost-wax casting" can also refer to modern investment casting processes. The fragile wax patterns must withstand forces encountered during the mould making. Much of the wax used in investment casting can be reclaimed and reused. Lost-foam casting is a modern form of investment casting that eliminates certain steps in the process. rdf:langString
Precisonsgjutning är en metod att gjuta mindre komponenter vanligtvis i stål med god ytfinhet och komplexa geometrier. Det anses vara världens äldsta gjutmetod. Vid traditionell precisonsgjutning tillverkas först en vaxmodell med samma geometri som det färdiga gjutgodset, antingen manuellt eller med hjälp av ett pressverktyg. Numera används även plastmodeller skapade med 3D-skrivare. rdf:langString
rdf:langString Feingießen
rdf:langString Investment casting
rdf:langString インベストメント鋳造
rdf:langString Precisionsgjutning
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rdf:langString Feingießen ist ein Gießverfahren, mittels dessen auch kleine und kleinste Gussteile formgetreu und bei minimierter Nachbearbeitung hergestellt werden können. Feingießen ist zum Teil dem Wachsausschmelzverfahren ähnlich, bei dem sowohl das Modell, meist aus Wachs oder Kunststoff bestehend, als auch die Form nach dem Guss nicht mehr vorhanden sind.
rdf:langString Investment casting is an industrial process based on lost-wax casting, one of the oldest known metal-forming techniques. The term "lost-wax casting" can also refer to modern investment casting processes. Investment casting has been used in various forms for the last 5,000 years. In its earliest forms, beeswax was used to form patterns necessary for the casting process. Today, more advanced waxes, refractory materials and specialist alloys are typically used for making patterns. Investment casting is valued for its ability to produce components with accuracy, repeatability, versatility and integrity in a variety of metals and high-performance alloys. The fragile wax patterns must withstand forces encountered during the mould making. Much of the wax used in investment casting can be reclaimed and reused. Lost-foam casting is a modern form of investment casting that eliminates certain steps in the process. Investment casting is so named because the process invests (surrounds) the pattern with refractory material to make a mould, and a molten substance is cast into the mold. Materials that can be cast include stainless steel alloys, brass, aluminium, carbon steel and glass. The cavity inside the refractory mould is an exact duplicate of the desired part. Due to the hardness of refractory materials used, investment casting can produce products with exceptional surface qualities, which can reduce the need for secondary machine processes. Water glass and silica sol investment casting are the two primary investment casting methods nowadays. The main differences are the surface roughness and cost of casting. Water glass method dewaxes into the high-temperature water, and the ceramic mould is made of water glass quartz sand. Silica sol method dewaxes into the flash fire, and silica sol zircon sand makes the ceramic mould. Silica sol method costs more but has the better surface than the water glass method. The process can be used for both small castings of a few ounces and large castings weighing several hundred pounds. It can be more expensive than die casting or sand casting, but per-unit costs decrease with large volumes. Investment casting can produce complicated shapes that would be difficult or impossible with other casting methods. It can also produce products with exceptional surface qualities and low tolerances with minimal surface finishing or machining required.
rdf:langString インベストメント鋳造(インベストメントちゅうぞう、英語: investment casting)とは、工業プロセスにおける鋳造方法のひとつ。
rdf:langString Precisonsgjutning är en metod att gjuta mindre komponenter vanligtvis i stål med god ytfinhet och komplexa geometrier. Det anses vara världens äldsta gjutmetod. Vid traditionell precisonsgjutning tillverkas först en vaxmodell med samma geometri som det färdiga gjutgodset, antingen manuellt eller med hjälp av ett pressverktyg. Numera används även plastmodeller skapade med 3D-skrivare. Därefter doppas modellen i en keramisk massa och bränns som keramik. Eventuellt kvarvarande vax smälts därefter ur och man får ett hålrum i vilket gjutningen kan ske. Med precisionsgjutning kan man skapa mer komplexa geometrier än med andra gjutmetoder, till exempel behövs inga släppvinklar. Det går också bra att använda keramiska kärnor i processen. Metoden används flitigt i fordonsindustrin och för produkter till processindustrin (pumpar, ventiler osv). I Sverige finns det 2010 två precisionsgjuterier, i Hallstahammar samt (aluminium) i Hackås. I Finland finns i Riihimäki. I övriga Europa finns ett flertal precisionsgjuterier och i Asien finns ett stort antal gjuterier i bland annat Kina och Indien.
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