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Which of the following materials is mostly used for making of thermoforming moulds?(a) Steel(b) Grey cast iron(c) Aluminium(d) White cast iron |
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Answer» Correct answer is (c) Aluminium To explain: Thermoforming moulds are always made of aluminum because of its light weight, machine ability, and good thermal conductivity. Aluminum moulds may also contain passages through which water can be pumped for cooling of components, which may greatly affect the shrinkage and other features of the components made. |
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