Pattern-making by unknow

Author:unknow
Language: eng
Format: epub
Tags: Patternmaking
Publisher: New York, J. Wiley & sons, inc.; [etc., etc.]
Published: 1914-03-25T05:00:00+00:00

TYPES OF PATTERNS

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pattern consist principally of true arcs or of plane surfaces a skeleton pattern may be made which is merely an outline of the casting to be produced. (Fig. 51.) The sand surfaces can be struck up by means of strickles or strikes which are guided by this outline. On large work this gives

Fig. 50.—Pattern for Hub and Spokes, 6-armed Sheave, Rim to be Swept up.

great economy of time and material in the pattern shop which more than offsets the extra labor of the molder.

38. Metal Patterns. When small castings are to be produced in large quantities, metal patterns are prepared, gated, and used in connection with a molding machine.

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