History of sand casting

Recording molding sand casting method Vannoccio Biringuccio a book published around 1540. In 1924, Ford founded the car company record by producing 1 million cars, in the process of consuming a third of the total casting production in the US As the auto industry growth the need for increased efficiency solutions grew. The increasing demand of castings in the car and machine construction industry growing during and after World War I and World War II, encourage new inventions in the mechanization and later automation technology sand casting process.

There was one barrier to production faster solutions but some. Speed ​​improvements were made in shaping, molding sand preparation, mixing sand, core manufacturing processes, and the slow rate of melting metal in cupola furnaces. In 1912, the slinger sand was invented by American company Beardsley & Piper. In 1912, the first mixer with plows revolving sand was located alone on the market by the Company Simpson. In 1915, when the first experiments with bentonite clay fire clay instead of simply as the bonding additive to the molding sand. This tremendously increase the green strength and dry the molds. In 1918, the first fully automated foundry for fabricating hand grenades for the US Army went into production. In the 1930s the first inserted high-frequency coreless electric furnace in the US in 1943, ductile iron was invented by the iron magnesium gray widely used. In 1940, thermal sand reclamation was applied to molding and core sand. In 1952, developed the “D-process” for making a fine shell models, pre-coated sand. In 1953, invented the hot box core sand process in which the cores are thermally cured. In 1954, a new central glass-water binder (sodium silicate) hardened with CO2 from ambient air, came into use.

Clay molds were used in ancient China from the Shang Dynasty (c. 1600-1046 BC). The famous Houmuwu wedge (c. 1300 BC) was using molding clay. The Assyrian king Sennacherib (704-681 BC) spent huge bronzes of up to 30 tons, and demand that the first person to have used clay models instead of the method of ‘lost-wax’:

Whereas in the time of kings had my forefathers created bronze statues imitating real-life forms to be displayed in its temples, but in their approach they had exhausted all the craftsmen, for lack of skill and failure to understand the principles they need so much oil, wax and tallow for the work that they caused shortages in their own countries-I, Sennacherib, leader of all princes, knowledgeable in all types of work, took advice far and deep thought over to make this work. Bullets Big bronze lions striding colossal, like any king before it was ever built before me, the technical skill gave Ninushki to perfection in me, and at the encouragement of my information and the desire of my heart I invented as technique for bronze and skillfully made it. I created clay models as if by divine intelligence …. twelve fierce lion-Colossi together with twelve mighty bull-Colossi was perfect projection … I poured copper in them again and again ; I made the castings as skillfully as if they weighed only half shekel each.