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q what are the secondary operations we apply in powder metallurgy methods give their use alsoans secondary processes of manufacture in addition to
q what is sintering explain the stages of sinteringans the operation of heating a green compact to an elevated temperature is known as sintering it
q what is the purpose of i sizing ii coining
q describe two major product applications of powder metallurgyans following are some typical applications of powder
q write short note on following i compression moulding of
q discuss the classifications of plastics
q write short note on q write short note on
q write short note on blow moldingorexplain the thermoforming process what are the plastic fabrication method write in brief with neat
q what are the ingredients of moulding componentsans polymer additives one or more of the following materials are added to the polymers either before
q describe the complete procedure of testing permeability of moulding sand how is permeability influenced by various parameters of the moulding sand
q describe shell moulding process merits and demeritsans shell moulding process
blow holes i excessive moisture in the moulding
q what kind of defects are likely to result in castings due to the following i core prints on the core are
difference between fin and swell swell the unintentional bulges found on the casting surfaces are known as swells
difference between blow hole and pin hole porosity blow hole they appear as cavities in a casting when they are
continuous casting in essential the process consists of pouring molten metal into a short vertical metal die or mould at a controlled rate which is
q discuss briefly the causes and remedies of shrinkage cavities casting
q explain the chaplets q explain the chaplets
q discuss briefly the causes and remedies of misrun and cold shunts casting cold shunt and misrun when the metal is unable to fill
q describe the terms solids zone mushy zone and liquid zone used in solidification of casting and explain directional solidification in castingans
permeability of moulding sand is the property of the sand which permits the gases and steam to escape through the sand mould for this purpose the
machine molding is suitable for the faster and uniform quality moulds needed for mass production of castings for
plastic molds are made of plaster of paris gypsum or calcium sulphate talc and silica flour is added in the plaster of
co2 molds carbon dioxide moulding is the process of hardening the moulds and cores by using carbon dioxide and sodium silicate liquid base binder
a half skeleton pattern for a hollow pipe is shown since the pipe is symmetrical about the pouring line the same pattern will serve the purpose of