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Sweep pattern
It is used to sweep the complete casting by means of a plane sweep. These are used for generating large shapes which are axis-symmetrical or prismatic in nature such as bell shaped or cylindrical as shown in Figure.This greatly reduces the cost of a three dimensional pattern. This type of pattern is particularly suitable for very large castings such as the bells for ornamental purposes used which are generally cast in pit moulds.
Figure- Sweep Pattern
Q. Define Pattern draft or taper? It is also termed as "draw". It is the taper placed on the pattern surface that are parallel to the direction in which the pattern is withdraw
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