Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional mechanic .. (1919)
Yates, Raymond F. (Raymond Francis), 1895- ed · New York, The Norman W. Henley Pub. Co. · leaf 108
and. Sometimes considerable rap-ping is necessary, and it is important to remember thata pattern should he as strongly constructed as possiblein order to withstand this treatment. Fig. 65 shows the appearance of the mould afterA\dthdrawing the pattern. A *gate or channel is cutthrough the sand from… … Fig. 6TA Fig. 67B Fig. 67A—Pattern drawn from sandFig. 67B—Parted pattern with core print clearly in mind, we will now take up the question of^^ draft. **Draft refers to the tapering of the sides of a pat-tern so that it may be easily **dra^\Ti from the mouldA\dthout breaking out the sand. In Fig.…
Machinery
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