Which of the following materials is used for imparting strength and collapsibility in core sand during core making process?(a) Molasses(b) Core oil(c) Sulphite binder(d) Thermo-setting resinThe question was posed to me by my college director while I was bunking the class.This intriguing question comes from Core Making Machines in portion Foundry Mechanizations of Casting-Forming-Welding I

Which of the following materials is used for imparting strength and co

1.	Which of the following materials is used for imparting strength and collapsibility in core sand during core making process?(a) Molasses(b) Core oil(c) Sulphite binder(d) Thermo-setting resinThe question was posed to me by my college director while I was bunking the class.This intriguing question comes from Core Making Machines in portion Foundry Mechanizations of Casting-Forming-Welding I
Answer» The CORRECT choice is (d) Thermo-setting resin For explanation: Thermo-setting resin is very popular in core making because it imparts high strength, collapsibility to core sand and it ALSO emits a minimum amount of MOULD and core gases which can PRODUCE defects in the casting component. The most general BINDERS under this category are phenol formaldehyde and urea formaldehyde.

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