The Brass-Moulder Illustrated; A Practical Guide for the Apprentice and Young Journeyman

The Brass-Moulder Illustrated; A Practical Guide for the Apprentice and Young Journeyman

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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. 1915 edition. Excerpt: ...pattern in the top half, care being taken not to graze or cut the impression when inserting it. Now roll out some clay to the thickness desired, cut it out in strips or squares, and lay it round the patterns and form the shape of plate. Then take the sand-knife and chamfer away all round the edges of the patterns, cutting the clay as near to the sand as possible to form an easy finished edge on the stripping plate. Dust over the clay with parting sand, and place on the extra half; insert the long pins, and proceed to ram up. Fig. 68 shows the mould lined with clay ready to receive the extra half. Before going any further, it may be as well to mention that when chamfering away the clay round the patterns to secure a sharp edge, place a few strips of white writing paper round the patterns and chamfer on to the paper, which makes a remarkably good guide, and prevents cutting under the clay and ruffling the surface. Having the extra half rammed up, lift off, sink a tube in the extra half, cut two double branch gates at one side, and remove the clay from the mould. Before placing on the extra half, oil round the bottom of the patterns, or melt some tallow, and paint on the grease with a small camel-s-hair brush, which will prevent the metal adhering to the patterns. Great care must be taken when placing on the extra half not to allow it to scrape or cut on the patterns, which would prevent patterns getting home. It would be advisable to take the bull by the horns, by cutting out the back 1 of the extra half, cutting down to the impression of the patterns and leaving the imjaression open. Then if it should graze on the patterns, the sand will come up and free the impression, allowing the patterns to retain their proper position; then fill in the back...
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Product details

  • Paperback | 42 pages
  • 189 x 246 x 2mm | 95g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236616138
  • 9781236616135