The Process of producing metal parts by pouring molten metal in to the mould cavity of the required shape and allowing the metal to solidify. The solidified metal piece is called as casting.
It the vertical faces of pattern are perpendicular to parting line, the edges of mould may damaged when the pattern is removed from the sand. Hence the vertical faces are mode taper for easy removal of pattern. This slight taper given on the vertical sides of pattern in caused draft allowance.
3. What are the common allowances provided on pattern? The various types of pattern allowances normally given are; 1. Shrinkage allowance 2. Machining or finish allowance 3. Draft or taper allowance 4. Distortion or camber allowance 5. Rapping or shake allowance 4. Is pattern differ from casting?Pattern is slightly larger in size as compared to the casting. Pattern may be in two or three pieces where as a casting is in one piece.
5. Name the various pattern materials.Solid or single piece pattern, match plate pattern, split pattern, sweep pattern, skeleton Pattern, segmental pattern, loose piece pattern, shell pattern.
7. What are the uses of runner and riser? Runner:Fettling is the name given to cover all those operations which help the casting to give a good appearance. It includes the removal of cores, sand, gates, risers, runners and other Unwanted projections from the casting.
11. Classify moulding Machines. 1.Squeezer Machine. 2.Jolt machine. 3.Jolt – squeezer Machine. 4.Slinging Machines. 5. Patten draw Machines.Sachin is a B-TECH graduate in Mechanical Engineering from a reputed Engineering college. Currently, he is working in the sheet metal industry as a designer. Additionally, he has interested in Product Design, Animation, and Project design. He also likes to write articles related to the mechanical engineering field and tries to motivate other mechanical engineering students by his innovative project ideas, design, models and videos.
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