Effect of Binder and Mold parameters on Collapsibility and Surface Finish of Gray Cast Iron No-bake Sand Molds

Chemically bonded no-bake molds and cores have good mechanical properties and produce dimensionally accurate castings compared to green sand molds. Poor collapsibility property of CO2 hardened sodium silicate bonded sand mold and phenolic urethane no-bake (PUN) binder system, made the reclamation of...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-08, Vol.225 (1), p.12246
Main Authors: Srinivasulu Reddy, K, Venkata Reddy, Vajrala, Mandava, Ravi Kumar
Format: Article
Language:English
Subjects:
Chemical bonds
CO2 mold casting
Collapsibility
Foundries
Gray iron
Green sand
Mechanical properties
Phenolic urethane binder
Process parameters
Rapid prototyping
Reclamation
Sand castings
Sand molds
Silicon dioxide
Sodium silicates
Surface finish
Surface roughness
Taguchi methods
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Summary:Chemically bonded no-bake molds and cores have good mechanical properties and produce dimensionally accurate castings compared to green sand molds. Poor collapsibility property of CO2 hardened sodium silicate bonded sand mold and phenolic urethane no-bake (PUN) binder system, made the reclamation of the sands more important. In the present work fine silica sand is mixed with phenolic urethane no-bake binder and the sand sets in a very short time within few minutes. In this paper it is focused on optimizing the process parameters of PUN binder based sand castings for better collapsibility and surface finish of gray cast iron using Taguchi design. The findings were successfully verified through experiments.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/225/1/012246