product news/產品新聞
is designed to handle up to 70 tons of melt per day in two shifts and is anticipating an expansion to 120 tons of melt per day on a two-shift basis. “We pour ductile iron castings ranging in weight from
1 lb. to about 75 lbs. and everything goes through the same [drum blast] machine,” said Farrar. Production runs range from 100 to 100,000 castings. Te CND series features a hydraulic bucket loader, floor- mounted double-lip separator and a no-leak drum design. It can be configured with a 6, 10, 14 or 22 cu. ft. drum blast. Its increased speed is due to an improved direct drive wheel. SST’s line of spinner hanger monorail machines, like the CND series, are designed for easy maintenance. Sinto Shake Blast continuous, in-line machines feature a mill with a unique shape, as well as strategically placed multiple lower power wheels, to facilitate uniform cleaning and reduce cast- ing damage during tumbling.
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www.robertssinto.com for more information.
件，提供全方位的铸造服务，设计，模具，数控加工和 研磨。该工厂目前的设计每天两班，熔化处理高达70 吨，预计在每天两班的基础上扩大到120吨。 “我们浇铸的球铁铸件重量从1磅到75磅不等，而且 所有铸件都由相同的滚筒喷砂机清理，”法拉介绍。产 品数量范围从100到10万件。
CND系列设有液压斗式装载机，落地式双杯分离器 和无泄漏滚桶设计。它可以配置6，10，14或22英尺滚 筒喷砂。由于改进了直接驱动轮其速度得到了提高。 SST部门也将其完整的旋转吊架单轨机带到美国市 场。 同CND系列一样，它们的设计便于维修。新东连 续式同轴抛喷丸机设计造型独特，以及策略性地放置多 个低功率车轮，以便均匀清理和在翻滚过程中减少铸件 损坏。
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A new generation of binders is now using non-volatile organic compound (VOC) solvents which utilize more constant and refined chemicals with lower, narrower intervals of distillation. These solvents replace the old vegetable based esters in new generation recipes (for example, the High Efficiency System developed by ASK Chemicals) and allow the formulator a unique way to reduce a part of the emissions. ASK Chemical’s research team has analyzed the basic data
for these variables and concluded the only way to warrant a significant reduction of the emissions during the PCS is to maintain the highest ratio of oxygen to organic materials. In the pouring and molding systems, the oxygen rate is mainly defined by the design of the pouring and molding process. Terefore, the only way for the binder designers to influence the ratio is to reduce the amount of organic materials. Te High Efficiency System allows a metalcaster to reduce the binder amount needed to produce good cores and cast- ings. Te optimized formulation was developed by selecting key raw materials as well as optimizing chemical processing. Continued systematic investigation led to the genesis of the SL system technology. In a standard coldbox three- part system: • Part 1 is composed of approximately 55% phenolic resin and 45% of solvents.
• Part 2 is composed mainly of poly-isocyanate derivates and 15 %-30 % solvents.
• Part 3 is the tertiary amine catalyst that drives the reaction. Both the part 1 and part 2 binders also contain specialty
Less Emissions with Solventless Coldbox Binders 目前新一代粘结剂使用非挥发性有机化合物
减少冷芯盒粘结剂溶剂而减少排放
（VOC）的溶剂，利用持续改进的化学方法，降低，收 窄蒸馏的间隔。这些溶剂用新一代配方替换旧的植物基 酯（例如，ASK化工开发的高效系统）和允许一种独特 的配方设计方式，以减少部分的排放。 ASK化工的研究团队已经分析了这些变量的基本数 据,并得出结论，PCS期间保持最高比例的氧气到有机材 料，是保证排放显著减少的途径。在浇注和充型中，氧 气率主要是浇注和成型过程中的设计定义的。因此，粘 结剂设计师减少机物质的量是影响。
高效的系统让铸造厂在生产优质的芯子和铸件时减少 粘结剂使用。选择关键原材料及优化化工工艺使优化的 配方发展。
续系统的调查导致SL系统技术的起源。可谓一个标准 的冷箱系统由三部分组成的系统： •第1部分是由约55％的酚醛树脂和45％的溶剂， •第2部分为主要成分的聚异氰酸酯的衍生物和15％-30 ％的溶剂。
•第3部分是的叔胺催化剂驱动反应
第1部分和第2部分粘结剂还含有特殊添加剂使用来 优化属性或铸造性能。
聚氨酯反应是由OH-基团的formo phenolicsin反应的 58 |
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION May 2013
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