Practical Notes on Pipe Founding

Practical Notes on Pipe Founding

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1888 edition. Excerpt: ... of sand daily from the dressing shed, in proportion as the new sand is brought into the foundry; hence the necessity for the rails L laid down in the dressing shed. For the purpose of convenience in preparing the core sand, it is advisable to have the sand pit H divided into three compartments, so that the various stages may be in operation at the same time, viz. the full compartment, and those being filled and emptied respectively. The amount of sand used for, say a 36-inch mould, is about 20 cwt., of which from 2 cwt. to 3 cwt. will be new sand and the remainder used sand; and for the core 14 cwt. will be required, of which from 3 cwt. to 4 cwt. will be new sand and the remainder used sand. The total amount used, therefore, will be about 34 cwt. for each 36-inch pipe cast, of which about 6 cwt. will be new sand. This amount of sand (34 cwt.) the emptying crane will have to lift to the ramming platform for every 36-inch pipe made; that is to say, if the casting crane is able to cast two 36-inch pipes in one hour, the emptying crane will be required to lift about 70 cwt. of sand per hour, in addition to the work of emptying out these two pipes. Clay Water.----This forms a very important item in a pipe foundry, and yet it probably gets the least attention. It is usually made up in the following manner, viz.: A quantity of common red clay is thrown into a wooden trough filled up with water, and a labourer takes a wooden paddle and stirs it up until it appears to be strong enough. Then the liquid is baled out and thrown upon the sand in the pits; this operation is usually left to an inexperienced labourer, and consequently the clay water varies in strength from the thickness of cream down to the water merely coloured with the clay, more

Product details

  • Paperback | 52 pages
  • 189 x 246 x 3mm | 109g
  • United States
  • English
  • black & white illustrations
  • 1236802586
  • 9781236802583