This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...repeated at only long intervals, there is a tendency for patterns to accumulate and to occupy a great deal of space. This should be avoided as far as possible, as it is better to make a new pattern when necessary than to store a number of old ones which require space and trouble for their preservation, and which, apart ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 Excerpt: ...repeated at only long intervals, there is a tendency for patterns to accumulate and to occupy a great deal of space. This should be avoided as far as possible, as it is better to make a new pattern when necessary than to store a number of old ones which require space and trouble for their preservation, and which, apart from the danger of fire, are often found to be more or less deteriorated when again required for use. a. board; b, casting box; c, simple patterns; d, sand. Fig. 25.--Simple form of Patterns and Mould. Perhaps the simplest example of moulding is with castings such as are represented in fig. 25, where articles are required, one side of each of which is flat and the rest of the pattern contains no re-entering angles. In such a case the patterns are placed face downwards on a board, the flask is then put in position above the patterns as shown, sand is thrown into the box and lightly rammed. When the mould has been thus filled it is "vented" (by means of a tool like a steel knitting needle stuck in a wooden handle) so as to allow of the ready escape of gas. It is then inverted, the board removed, and the patterns gently tapped and taken out. A channel called the "git" or "gate" is provided, so as to allow the metal to enter the mould, and also, if necessary, to pass from one part of the mould to another. A flat box filled with sand is clamped in position, to replace the board which originally held the pattern, and the mould is ready for pouring. In moulding it is of course essential that the sand should be rammed sufficiently to give an accurate impression of the pattern, but hard ramming should be carefully avoided, as this not merely involves additional labour but renders the sand too dense and helps to produce bl...
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Add this copy of Lectures on Iron-Founding to cart. $19.90, fair condition, Sold by Anybook rated 5.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1911 by Charles Griffin.
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In fair condition, suitable as a study copy. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 400grams, ISBN:
Add this copy of Lectures on Iron-Founding to cart. $56.29, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2016 by Palala Press.
