The preparation of lost foam casting

Prepared by Praxis models commonly applied in Foundry Research Institute, ie deposited ceramic layer of appropriate thickness of the polystyrene foamed – copolymer model. The assembly was molded ceramic layer model in unbounded dry quartz sand of defined granularity. The ceramic layer made using ceramic coating materials:

– Kerrntop L87

– manufactured by Ashland, 74- 77% solid phase, 2.26-2.38g density / cm3, viscosity from 6.8 to 10.0 Pa · s;

– Troflex WK-LF, solid phase 83-84%, viscosity 30.0 Pa · s; density of 2.6 g / cm 3 – produced by Ashland, Number of ceramic layers – 1, a thickness of not more than 0.7 mm.

The model of self-support made of layers of ceramic technology and the materials used were developed in the Enterprise Foundry Innovation, Ltd.: – A series of ceramic prepared by the technology usually applied in the process of lost-wax, with four layers of ceramic. Drying and / or ceramically-covered baking sets of models were carried out in accordance with procedures developed by Foundry Research Institute. The preparation of the mold cavity molds for the lost foam process was used. The mold cavity includes a special shaped flasks, prepare position for model sets (formation of ceramic coatings, consolidation, preparation for mold pouring). Assumptions: – Number of sets in the flask shape model, – model material – quartz sand rough from Jaworzno, model sets Preparation: – ?? pouring sand into the molding flask, ?? – Location of the model sets and pouring sand,

Consolidation vibrational. The models subject to the thorough inspection and pouring stand. Developed technology keeps preparing the mold, melt parameters and procedure pouring in Foundry Research Institute. Prepared test plates of alloy iron-alloyed during the realization of the research project. Was selected for further investigations of the chemical composition assumed plates. Mould Technology, melting and pouring parameters developed in the Foundry Research Institute. Developed the chemical composition of the alloy by these authors present within its research activities at the Department of Sciences and Metal Powder Metallurgy (AGH University of Science and Technology) and the Department of Ferrous Alloys (Foundry Research Institute).

Three different kinds of alloys were selected for experimental works. The materials are free alloy iron, alloy additives, pure elements, and additives for carbonizing predefined granularity. The thawing process was conducted in a medium frequency induction furnace of 60 kg capacity. Settled temperature superheating and casting of molten metallic material. It’s within 1550 C -1600 C. In the course of investigating experimental multiple test solutions were fabricated. Therefore verification technology developed during the progress of the project. The protocol pouring and technological parameters changed. Cast plates were obtained satisfactory representation and hardness good shape. Was subject to a number of test castings detailed investigations of structural and thermal processing.

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