TY - JOUR N2 - In modern times, there are increasing requirements for products quality in every part of manufacturing industry and in foundry industry it is not different. That is why a lot of foundries are researching, how to effectively produce castings with high quality. This article is dealing with search of the influence of using different types of risers or chills on shrinkage cavity production in ductile iron castings. Differently shaped risers were designed using the Wlodawer´s modulus method and test castings were poured with and without combination of chills. Efficiency of used risers and chills was established by the area of created shrinkage cavity using the ultrasound nondestructive method. There are introduced the production process of test castings and results of ultrasound nondestructive reflective method. The object of this work is to determine an optimal type of riser or chill for given test casting in order to not use overrated risers and thus increase the cost effectiveness of the ductile iron castings production. L1 - http://www.czasopisma.pan.pl/Content/102021/PDF/afe-2017-0064.pdf L2 - http://www.czasopisma.pan.pl/Content/102021 PY - 2017 IS - No 2 DO - 10.1515/afe-2017-0064 KW - Ductile iron KW - Shrinkage cavity KW - Riser KW - Chill KW - Ultrasound A1 - Vasková, I. A1 - Hrubovčáková, M. A1 - Conev, M. PB - The Katowice Branch of the Polish Academy of Sciences VL - vol. 17 DA - 2017 T1 - The Influence of Using Different Types of Risers or Chills on Shrinkage Production for Different Wall Thickness for Material EN-GJS-400-18LT UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/102021 T2 - Archives of Foundry Engineering ER -