product news/產ռ新聞
Crucible Furnaces for Energy Efficiency 效ৗ高提Ք炉埚坩ֹ新
StrikoWestofen, Gummersbach, Germany, has introduced
new crucible furnaces with porous burner technology that are capable of a 20% increase in energy efficiency compared with conventional crucible furnaces. Tese high-energy savings are a result of the optimal pre-mixing of gas and air and the resulting near-stoichiometric combustion. Tey are suitable for melting and holding aluminum and magnesium. Flameless burners heat the silicon carbide and steel crucible uniformly without causing any hot spots. Also, the low flow speed ensures the hot gases remain at the crucible for longer, thus allowing optimal utilization of energy. ■
The new crucible furnace can increase energy efficiency by as much as 20%.
孔ך用采ӟՇ开已՛Ҹ西ұ杰史ङ赫巴斯默Վ国德
燃烧技术ङ新型坩埚炉，ЊѮ统ङ坩埚炉ब比，Օ提高 ङ气然מչ气空д化ѩ是果效ਈਭङੋ显。效ਈङ 预混合，采用近化学ઋ量燃烧技术ङৈ果。这п技术适 ֪匀֮֘烧燃焰无。温ґչ炼熔ङ金合镁չ金合铝й用 加热碳化硅չ钢坩埚，Љѫф生ѠѾ ङ热ਭ点。৲Ќ，Ѻ流速Эґચд热 ѩ৲ђ，И埚坩֨存ґ间时长љՕ气 化ਈ源ङ҅用。■
ङਈ效。 达高高提לਈ炉埚坩型新
Low Pressure Casting Machines With More Energy, More Power, Less CO2
Despite the high demands on the cast crankcase, Kurtz
low-pressure casting machines make production very profit- able. How does that work? Te design and demands on crankcases have changed
5)排Ӗ并ૉ负的高更Ո承כৗ件铸的Ӟ造铸Ըѹ 要高更дӟ提ў铸ঔ轴曲ث֫١ङӹऩ管ـ
dramatically. In addition to the water jacket core, many sand cores are currently used for the production of crankcases to enable the inner contours (cooling channels) of the crankcase to be cast. “Open deck” has given way to “closed deck,” as the latter offers more stability, enabling the crankcases to operate with higher loads. Te best possible casting quality is essential. Cylinder lin-
ers mostly made of gray cast iron are employed less and less, as running surfaces are directly cast and subsequently coated while no pores may appear during the coating process. Tis and higher injection pressures require the best possible cast- ing quality and increasingly higher mechanical properties— both in the area of the crosspieces and the crankcase. Low-pressure casting offers the optimum process for
satisfying all of these requirements. Turbulence-free or low- turbulence die filling is of key importance here, thus oxide formation is avoided. Sufficient cooling is the most important prerequisite to
achieve the mechanical properties and to reduce the cycle time. Multiple cavity dies i.e. two crankcases per casting shot, is now possible without increasing the cycle time. On the contrary, cycle times are reduced, irrespective of the die design and layout. In order to achieve this, Kurtz uses the proven furnace
这。ञ效济经Ӏ更սф҅וગ造铸ԹѺङ՛Ҹ`ZX[1，求 ;呢ङӱҟѾײ是 除。化Պङם很д生Շ求要չઋગङঔ轴曲，ӹऩ 构ৈ部ӄङঔ轴曲造铸来ਯ砂ך很用҅还，יљਯ套水 （Ӓ却管道）。Ȕ敞开ङ承架ȕ已ੴȔ闭合ङ承架ȕՈ ֨ঔ轴曲҅љՕ，强更性定६ ȕ架承ङ合闭ȔО֜，ї 更高ङિਾЈ运੧。 气铁铸灰ङӣ部ם，֨现，要重Ҽਙ量ૅў铸ङױ最
৲造铸接फљՕ面ҁ工ङ滑Ұ，用҅ص越来越已套੯缸 力Թذ֕ङ高较。孔气ङ生ф料涂֜现ӟѫЉЌ৲，成 档横֨，ਈ性学力ङ高提断Љչ量ૅङױ最有ў铸要需 。此ײ是都ӣ部ЗДঔ轴曲չ 要ङ有۱足满，术技ਫ工ङ҄最д供提ਫ工造铸ԹѺ 型ҭ，要重Ҽਙ型ҭ型铸ङ流紊Ѻ或流紊无，О֜。求 过३Љѫф生氧化物。 ҭ足ङӒ却是达ӱ要求ङ力学性ਈ，ঢ়ि生фյ期最 ԹѺ型每ײ҆，ў铸Зך放型铸З每。ў条提ӹङ要重 成型 З曲轴ঔ是Օљ实现ङ，৲ЌЉѫ增加生ф时间。 ঢ়期յф生，间时ӧ排չઋગङӀ模算ઋЉ果ײ，Նब िд。
Од达ӱ这п要求，1[XZ`Ҹ՛采用д经过验ચङ熔 March 2016
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 77
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