Figure 5. Tian Qian Heavy Industries cast this 160-metric-ton steel rudder arm with Bangni resin sand (shown after heat treatment).
图5 天乾重工生产的 160吨船用挂舵臂大型 铸钢件(热处理后)
Steel castings produced for Sandvik (Fig. 4) by
other metalcasters using Bangni resin sand obtained recognition and praise from Swedish experts. A 160 metric ton, large rudder arm steel casting
made by Tian Qian Company with Bangni resin sand had a good surface quality. Te full production process of the steel casting was under the supervision of seven countries’ registries of shipping and was certified by each of them. Te casting was directly shot blasted after shakeout and its good surface quality can be seen in Figure 5.
Summary Bangni resin does not contain any free aldehyde
or phenol, which is important progress in making an environmentally friendly metalcasting resin. Bangni resin uses agricultural waste as raw mate-
rials, which replace non-renewable aldehyde and phenol extracted from oil. This is important progress in following the sustainable development principle of metalcasting production. Because the recycling rate of used Bangni resin-
bonded sand can reach 90-95%, discharged waste sand is greatly reduced. Practical experiences of many customers that use
Bangni resin sand show reclamation requires single- stage, dry reclamation equipment, eliminating the need for hot reclamation. Compared to water glass (silicate) and phenolic resin sand, the equipment investment and cost of reclamation are reduced. Bangni resin sand has good service properties and
the surface quality of steel castings made with Bangni resin sand is excellent. Gas, smoke and odor emitted from Bangni resin sand molds after pouring are significantly reduced.
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其次是由于邦尼树脂型砂的强度适当,铸型表 面安定性好,促进了铸件表面粗糙度的细化。 因此,用邦尼树脂砂生产的铸钢件具有良好的表面 质量。无锡铸造厂生产的船用件及为日本用户生产的 大渣包等,都受到了用户的好评。
其它铸钢厂家,采用邦尼树脂砂为山德维克公司生 产的铸钢件(如图4所示),也得到了瑞典专家的肯 定与赞扬,。
天乾重工用邦尼树脂粘结砂制作的160吨大型挂舵 臂铸钢件,表面质量良好,经7个国家船级社对全过 程的监造,通过了7个船级社的认证,铸件落砂后直 接抛丸,表面质量良好,见图5。
四、 简要的总结
1、邦尼树脂不含游离甲醛与苯酚。这是铸造用 树脂在实现环境友好方面的一个重要的进步与突 破。
2、邦尼树脂用可再生的农作物与植物下脚料作原 料,代替了不可再生的、从石油中提炼的甲醛与苯 酚,是铸造生产遵循可持续发展方针的一项重要进 展。
3、邦尼树脂砂旧砂的回用率达90%--95%,使原 砂得到了充分的循环利用,大幅度地减少了废弃砂的 排放。
4、众多的邦尼树脂砂应用厂的生产实践证明,邦 尼树脂砂的再生仅需一级干法再生机械装置,不需热 法再生。与水玻璃砂、碱酚醛树脂砂相比,减少了砂 再生的成本及设备投资。
5、邦尼树脂砂具有良好的使用性能,生产的铸钢 件表面质量很好。
6、邦尼树脂砂型浇注后,散发的烟、气显著降
低,受到作业人员的欢迎。 访问
www.globalcastingmagazine.com可拷贝2012年 AFS砂型铸造会议全部报告。
February 2013
FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 49
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