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The fusible core process finds application, for example, for injection molded passenger car engine intake manifolds. By modifying the equipment, small molded parts like valves or pump housings can be manufactured, as the manufacture of the fusible cores and the injected parts can be carried out on an injection molding machine.
Early civilizations discovered lead aided in the fluidity of molten copper, allowing them to cast more intricate designs. For example, the dancing girl of Mohenjo-daro is a copper alloy casting that most likely utilizes the lost wax technique. [4] Lost wax casting can be dated back to 4000 BC or the Chalcolithic period. [4]
Alginate was discovered by British chemical scientist E. C. C. Stanford in 1881, and he patented an extraction process for it in the same year. [4] The alginate was extracted, in the original patent, by first soaking the algae in water or diluted acid, then extracting the alginate by soaking it in sodium carbonate , and finally precipitating ...
A: There is nothing like a good hand-applied wax; it could be pasting wax, liquid or even a spray wax. Spray wax at a car wash does provide a little protection for the paint and adds a bit of a shine.
Produce wax patterns: Although called wax patterns, pattern materials may also include plastic and frozen mercury. [6] Wax patterns can be produced in one of two ways. In one process, the wax is poured into the mould and swished around until an even coating, usually about 3 mm (0.12 in) thick, covers the inner surface of the mould.
Spray-on car wax is the easiest to apply and remove. However, spray-on car waxes do not clean deeply, are less weather-resistant, and generally have the poorest durability. That makes them best ...
Lost-foam casting 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 foam to simplify the investment casting process by removing the need to melt the wax out of the mold.
Because this difference is quite small there is much overlap in the terminology. Non-proprietary terms that have been used to describe these processes include: cavityless casting, [2] evaporative foam casting, foam vaporization casting, lost pattern casting, the castral process, and expanded polystyrene molding.