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Control of cost heftiness of castings production with improvement of PROJECTS

Kafka V., Nykodýmowá V., Szmek V., Lána I., Doupovec D., Knirsch V., Martinák R., Fošum J., Novobílský M., Jochim R.

Archives of Foundry Engineering

2008

Vol. 8, iss. 2

77-80

The Specialized Commission for Economy of Czech Foundrymen Society in the Czech Republic systematically follows a solution of particular phases of castings production from iron and non-ferrous metals already for eighth years. These separate studies are uniformly aimed at cost analysis of chosen phases of castings production. The analysis of cost heftiness and recommendations for concrete remedies for particular foundries are the results. The contribution is aimed at transparent description of topics of the PROJECTS I - VII. Further on it describes in more details the PROJECT VIII, especially the costs of preparation of moulding mixtures. The team solving this problem gathers the results of costs comparison of preparation of fifteen moulding mixtures in five Czech foundries in this project. The inquiry topics are bentonite moulding mixtures (unit, pattern, and heap), further on the self-setting mixtures (with waterglass and furane). The inquiry is closed with Cold-Box-Amine core mixture. The evaluation is aimed both at own cost comparison, and at prediction of moulding mixture costs resulting from knowledge of their structure. Further on it deals with the future growth of waste costs. Subsequently, the possibilities of costs specification concerning to power consumption are viewed. Very interesting results are described for studying the relations of costs of moulding mixtures and particular castings. Questions of determining the price of used return moulding mixture are remarkable too. The way to achieve another costs reduction is also the investigation of costs changeableness for mixing the mixtures. The work ends with summary suggestion of next progress.