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Fig. 3. This diagram depicts the ideal temperature compensation.
图3 这个图描述了温度补偿的方法。
through an additional process. A void between the green sand mold and the weight-reduced core package is filled with dry and binder-free sand. Controlled by slight vibration, the filling achieves a homogeneous density distribution and will make stabilize the core package. Te forces that occur during mold filling will be led off without deforming the outer core parts by the sand filling in the direction of the green sand mold. Since the behavior of the uplift is limited by this kind of power absorption, the ventilation can be led through the binder-free sand. Te result is a complete separation of liquid iron and the green sand mold, if the sprue with descent is integrated in the core package (Fig. 1). After sufficient cooling, the binder-free sand will be returned
to the filler sand circulation by a simple turn of the flasks. Te mutual contamination of the other two sand systems is achieved by removing upper box and the turn-over of the casting and the core sand. Te process alternative to core packages ready for casting
in Fig. 2 consists of filling with binder-free sand, a transport frame and a weight for the casting procedure. Te transfer of the casting energy toward the frame and the weight on top of it, is carried out by the homogeneous sand filling, and therefore the core package can be performed weight-optimized. Also in this version, the binder-free sand is separated early
from the casted core package. In both process versions, reducing core package weight is possible with a filler sand circulation, and, in subsequent thermal isolation of the casted core packages, temperature equalization takes place between the casting and the core sand, which is plot- ted in Fig. 3. Even when the sand of the core package is heated unevenly, it is possible for small core sand/iron ratios to increase the core sand temperature to a level that meets the requirements for complete reclamation.
Te use of less binder in lighter core packages, reduced
reclamation costs due to volume and temperature control, resource sav- ings and environmental reliefs are the defining characteristics of the process methods—a few of which are pro- prietary—introduced here by Kunkel
Wagner. Visit
www.kuenkel-wagner.com for more information.
Fig. 4. Reclamation from the first heat is shown.
图4 展示一次浇注成 型后的砂再生
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FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION February 2013
度分布，使得组芯更稳固。这样砂子就填充向砂型， 所产生的力使得组芯不会变形。这样的力限制了上浮 行为，而无粘结剂的砂子就成了出气通道。如果下浇 杯与组芯做成一体的话，这又使得铁水与砂型完全分 离，见图1
在充分冷却后，无粘合剂的砂子将会经由一个简单 的砂箱回转被送回到填砂循环中。其他两个砂系统相 互混杂污染的砂将通过移动上砂箱和翻转铸件与芯砂 来收集。
图2（Fig.2）为组芯铸造替代工艺，为无粘合剂的 型砂填充系统，一个传送框和一个为铸造工艺的称重 装置。铸造能量传送到框和及称重装置上部，然后载 运均质的填充砂，组芯还能够在此进行重量优化。 同样在这一代的设备系统中，无粘合剂型砂提前与 铸件的组芯砂分离出来。
这两个代工艺中，使用填充砂循环使得减少组芯的 重量成为可能，而后组芯产生热绝效果，这样铸件和 芯砂之间的温度得以均匀，详见图3（Fig.3）。 即使当组芯的砂子受热不均，用小芯砂铁比来提 升芯砂的温度，从而达到完全再生所要求的温度是可 能的。
较轻的组芯上使用较少的粘合剂，由于控制体积和 温度来降低砂再生的成本，节约资源及保护环境是这 个处理工艺的本质特征-其中有Kunkel Wagner公司 的产权，由Kunkel Wagner进
行介绍。 更多信息请访问：
www.kuenkel-wagner.com
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