Which of the following synthetic resins are used for mixing with sand in shell moulding?(a) Thermosetting resins(b) Epoxy resins(c) Fiber glass resins(d) KevlarThe question was asked in homework.I would like to ask this question from Shell Moulding in section Special Casting Techniques of Casting-Forming-Welding I

Which of the following synthetic resins are used for mixing with sand

1.	Which of the following synthetic resins are used for mixing with sand in shell moulding?(a) Thermosetting resins(b) Epoxy resins(c) Fiber glass resins(d) KevlarThe question was asked in homework.I would like to ask this question from Shell Moulding in section Special Casting Techniques of Casting-Forming-Welding I
Answer» Correct option is (a) Thermosetting resins To EXPLAIN I would say: The synthetic resins used in shell MOULDING are essentially thermosetting resins, which get hardened by HEAT. Phenol formaldehyde resins are mostly used, which combines with sand to form a PROPER mixture for shell moulding. The mixture formed has high strength and RESISTANCE to heat.

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