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fume levels in the foundry. Te latest range of secondary attrition units are manu-


factured under license by Omega Foundry Machinery Ltd. from a design by Sinto of Japan. Here, a ceramic lined drum rotating at high speed is em-


ployed with a variable sized lip over which the sand must pass in order to escape. Te lip gives the required retention inside the drum and var-ies depending on process and scrubbing re- quired. Te squeeze rollers have a ceramic outer lining and are friction driven by the sand inside the drum. Te pressure at which the rollers squeeze the sand is also variable depending on the energy required to remove the binder and the fragility of the sand grain itself. Due to the light pressure used and a fixed minimum gap between the rollers and the drum, there is no possibility of crushing the sand grains. Tere are further options of using two or three additional attrition cells for further reduction of binder on the sand. Once the sand leaves the attrition cells, it enters an inte-


gral fluidizing chamber with dust extraction for removal of dust and fines. Te combination of a very shallow fluidized bed and fully adjustable negative pressure inside the fluid- izing chamber enables very precise fines removal. In the case of alkaline phenolic, typically we would expect


a 50% reduction in loss on ignition (LOI), with a single cell unit and a further 20% reduction in LOI with a double cell unit. Similar levels in soda content reduction can be observed in the case of silicate. Secondary Attrition together with thermal reclamation


provides all foundries with a choice for cleaner reclaimed sand. Tese units complement any existing mechanical reclamation plant in the foundry’s quest to improve quality, reduce costs and reduce the impact on the environment. 


二次研磨设备的最新系列是在Omega铸造设备公司 的许可下,采用日本新东公司的设计方案制造的。 其中,设计了高速旋转的有陶瓷内衬的转鼓,转鼓 可有不同尺寸的轮缘,砂粒必须越过轮缘才能离开研磨 装置。轮缘使内衬鼓内部保持一定量的砂粒,并且可根 据要求工艺和摩擦程度改变。挤压滚轮有陶瓷外衬,并 且由转鼓内部砂子的摩擦力驱动。挤压滚轮挤压砂子的 压力也根据去除粘结剂所需的能量以及砂粒本身易碎性 的不同。由于所使用的压力小,挤压辊和鼓之间的最小 间距是固定的,不可能使砂粒破碎。此外,通过2个或 3个研磨单元来进一步减少砂子上的粘结剂还有更多选 择方案。


砂粒离开研磨单元后,就进入有除尘装置以去除灰尘 和细微颗粒的集成流化室。非常浅的流化床与流化室内 可完全调节的负压相结合,可以去除极细小的颗粒。 对于碱性酚醛树脂砂,一般情况下,使用一个单元设 备可减少50%的灼烧减量(L.O.I.),使用双单元可使 灼烧减量降到20%。对于硅酸粘结砂,碱含量也可减少 同样的水平。


有热再生装置的二次研磨设备为所有铸造企业提供了 获得比较清洁的再生砂的选择。在铸造企业提高产品质 量、降低成本、减少环境污染方面,这些设备是现有任 何机械再生设备的补充。 


The Cost-Effective Way to Make Iron Castings 最具性价比的铁铸件制造方法


Since its foundation in 1996, Winhere Auto-Part Manu-


facturing Co., Ltd., has grown rapidly to become the largest professional manufacturer of brake discs and drums world- wide. Servicing the automotive OE and aftermarket, the company produces and ships more than 30 million high-end brake discs annually to its customers located in all corners of the world.


As a quality-conscientious manufacturer, it was a stra- tegic decision to Winhere to sign a contract for two DISA 240-B lines, including Automatic Pattern Changer (APC), in October 2010. Already being China’s largest and the world’s second largest supplier of brake discs, Winhere purchased the DISA equipment to help to become the world’s largest sup- plier of brake discs by 2015. “Te DISA 240-B lines are capable of producing 450 molds per hour with the highest precision, and the APC al- lows high flexibility in our production program,” said Win- here CEO Mr. Jiang. “As such, our purchased DISA equip- ment has helped us solve our two main issues in production, namely efficiency and accuracy. Where our previous molding


自1996年成立以来,胜地汽车零部件制造有限公司 已迅速成长为全球最大的刹车盘和刹车鼓专业生产基地 之一。公司服务于世界汽车整车和售后市场,每年为其 全世界各地的客户生产和交付3000多万件高端制动盘 产品。


作为一家品质至上的制造商,胜地于2010年10月签 署了两条迪砂240-B生产线合同,其中包括自动换型装 置(APC),这是一项重大战略决策。上述迪砂设备的 购买能够支持和帮助实现胜地实现其目标,即到2015年 成为全球最大的刹车盘供应商。


“迪砂240-B生产线每小时能够生产高精度砂型450 型,而快速换型装置也提高了我们生产计划的灵活性。 因此,我们购买的迪砂设备已经帮助我们解决了生产方 面的两大难题,即:1)效率 2)铸件的精度。我们之


74 | FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION March 2015


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