Discussion on "Mould design and workshop practice" at the Manchester Section of the Institution

MR. FRASER (Section President) : Mr. Snell can perhaps tell us what kind of steel he uses for his moulds. He referred to insulation material. I take it by insulation material is meant material suitable for commutators. Is different powder used for insulation material than for ordinary mouldings. Could Mr. Snell give us the pressures and temperatures for the average moulding ? That might be useful, to know. Reference was made to the necessity for cleanliness, particularly with regard to urea moulding? Having had a little´ experience in that direction I agree. Does Mr. Snell consider a dustproof room necessary in that particular case ? Mr. Snell has referred to special drills. It would help us considerably if he could give us. some idea as to the tool steel used for special drills, their particular: shape, or any other helpful information.