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Woodturning skills were used by patternmakers in the making of prototypes and shapes for casting molds used in foundries during the 19th and 20th centuries. They worked very slowly to achieve precision, using enormous pattern maker lathes and slow-cutting scraping tools. [16] Woodturning has always had a strong hobbyist presence.
Wax carving is the shaping of wax using tools usually associated with machining: rotary tools, saws, files and burins or gravers. Actual knives can be used and most certainly are, but the hardness of the material is such that they are not the ideal tool, generally.
Wax patterns are used in an alternative casting process called investment casting. A combination of paraffin wax, bees wax and carnauba wax is used for this purpose. In this case the wax "pattern" is melted out from the mould cavity which is normally a rigid plaster like material rather than sand, so the wax "pattern" can only be used once. [5]
Lost-foam casting (LFC) is a type of evaporative-pattern casting process that is similar to investment casting except foam is used for the pattern instead of wax. This process takes advantage of the low boiling point of polymer foams to simplify the investment casting process by removing the need to melt the wax out of the mold.
Cope and drag with cores in place on the drag Two sets of castings (bronze and aluminium) from the above sand mold. In foundry work, the terms cope and drag refer respectively to the top and bottom parts of a two-part casting flask, used in sand casting. The flask is a wood or metal frame, which contains the molding sand, providing support to ...
Woodworking is the skill of making items from wood, and includes cabinetry, furniture making, wood carving, joinery, carpentry, and woodturning. History [ edit ]