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drawn. Ten, the mold is printed at Christenguss on the ExOne S-Max and cast on site. Lastly, the finished cast blank undergoes a visual inspection. Te timeline for the entire process from the CT scan to the finished blank only amounts to about three to four weeks. Tus, the respective digital three-dimensional data can be obtained very quickly from any existing object of any size or shape without the original data. “Obsolete parts can thus be quickly reproduced in reverse


engineering by means of the digital process,” Barth said. “For example, if the original manufacturer is no longer in business or no longer offering the part.” He also makes the point that Christenguss has become a real specialist in the field of tool-less mold production—particularly by using the S-Max-printer. “It produces complex sand cores and molds directly from


CAD data, eliminating the need for physical models,” Barth said. “In this way, Christenguss even produces complex inner contours with a printed sand core from the S-Max.” Changes and optimizations in the CAD data can be imme-


diately implemented in the product design and the casting can therefore start within a short time and without additional tools. Tere is also a great freedom of design when printing detailed, high-precision cores and complex geometries. “Tanks to the 3D-printing of the molds, positioning


systems can also be integrated directly into the sprue for a cast- ing,” Christen said. “As a result, this means specific set-ups for machining and plastering of parts are only necessary to a very limited extent.” ■


现并型砂印۸Ї^G3 9 KT5^+ङYY[MTKZYOXN)֨，ե 成成完ӱ描扫:)ђ。坯铸ս成查检ંऩ，ե最。铸浇֫ 始Խ有没֨，此֜。间时յ 要需约ם३过З整ङս 有现ѾѠङ状形或ت尺ѾѠ有ӀђљՕ，Јӑەङ据数 。据数维І字数ङ应ब得ੂ֪速快常非И象ث ३过字数过通љՕў零ङ时过，此֜Ȕ：ॐ੮NZXG(


Љ商造Ӳ始Խ果ײ，ײ҆。ф生新重速快И३工էՆ֨ ȕ。式方થ用҅љՕө，ў部થ供提ӇЉ或֨存 ֿ领ф生Ӏ模无О成经已YY[MTKZYOXN)，ӟ指还ѕ


。面方机印۸^G3 9用҅֨是Ӱ特，؟Ћ正ऱङ 砂ङ杂ז成生据数*')据根接फՕ它Ȕ：પNZXG(


方य़这过通。求需ङӀ模理物ثд除消，型砂չਯ ，ਯ砂印۸^G3 式，)NXOYZKTM[YYҸ՛甚ਙՕљ҅用9 ȕ。ў铸ङ杂ז廓轮部ӄф生 实Иઋગսф֨即立љՕ化ѩչ整લङ据数*') 模ङי额要需ЉЌ并造铸始开ӄ间时ि֨љՕ此֜，现 ，时状形Ѿәङ杂זչਯ砂ङچত高、ূত印۸当。Ӏ 。چंਘઋગङם很有ӀЭ ՕЭ统系ѹ定，型砂印۸* )NXOYZKT੮ॐ：Ȕंй


特ङ工加ў零明੮这，此֜，И道浇ў铸ӱ成集接फљ ■ ȕ。量ѿङش常非需ю置ગ定


Inorganic Binders Compared to Shell Sand Te INOTEC technology has proven to be especially


较比的砂ֹגЉ剂՟॰机无 实૪ચ明，/45:+):3技术特Ӱ适合й铝合金铸造，


suitable for aluminum casting applications, particularly in highly productive and challenging segments such as the manufacture of aluminum engine blocks and cylinder heads in permanent mold casting. More foundries are converting from organic to inorganic binder systems for several reasons. Odorless core production, no harmful emissions during


casting, less cleaning of machines and tools, the resulting higher output and productivity, and the advantages in terms of casting, such as faster solidification due to reduced die mold temperatures – these benefits of the INOTEC tech- nology are already well-established when compared to clas- sical organic binder technologies. Despite all this, inorganic binder systems will always be benchmarked against existing technologies such as shell-sand. Shell sand is a resin (phenolic resin) coated sand, typi-


cally silica sand but also more special ceramic sands. Te total amount of resin is typically in a range from 2,5 to 3,5% (based on sand) or higher depending on the specific needs for strength values. INOTEC is an inorganic binder system which is based


on two different components—a liquid INOTEC binder and a solid component—the INOTEC Promotor. Te latter component is not just an additive but rather a part 2 of the binder system as important properties are associated with it,


型ً金ײ҆，ў部零ङ性战挑有Ӏչф生量批ם֨是ҿ尤 铸ङך越来越。造Ӳङत缸气չѽ缸机动Շ铝ङИ造铸 无择选ОՊ转统系剂合ড机有择选ђ֜Խय़՟йӟԴ造 放排ЉИ३过造铸֨、ф生ਯ砂ङն无 机ড合剂系统。 量фङ高更现实、洁清ङӀ模չ֘机ثصӗ、ૅ物害有 ৲Ѻ降چ温Ӏ模йंײ，势ѩङ面方造铸Ճљ，率ф生չ 3:)+:54/，比ब术技剂合ড机有统ѮЊȍ快加֡凝҅ A点ѩп这дוӀ经已术技


剂合ড机无，此ײ管ـ。C


铸型ד。ӕׂО）造铸型דײ（术技有现љৄ始ر系ѽ 造用砂是一य़树脂砂（酚醛树脂）ȍȍ通常是硅砂，Ѹ ֨量խ总ङ脂树，Јӑە常通。砂ট陶ङ殊特更有Э 需ѽӀङқچ强йӐՈ（高更或）型ঝ砂据根（％ ਙ 要）。


)+:54/ѽ液（ӣুգЉय़Дйׂय़一是)+:54/


ড机无ङ）剂进促)+:54/ङવ۱即，ӣুѽ֡չ剂合ড 合剂ѽ系。ե一य़ুӣЉюю是添加剂，৲Ќ是ড合剂 ҆，ङਚحૅ性要重ङҼबҿЊं是这，ӣ部 ѽ系ङআ य़Д这，ӹФ用҅֨。ঈ砂落、性定६热、چ强始初ײ 。И置装砂混֨合混起一料材火৳Њӣু


March 2017 FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 55


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