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Foundry casting process is introduced Foundry casting

by:XEX     2020-11-14
Foundry casting refers to the use of clay bonded sand for casting, molding materials production is the process method has a long history, is widely used in various industries, of course, jewelry industry is no exception. Small make up today is to introduce to you about foundry casting process. 1, sand mixing stages: preparation of sand and core sand, used for modelling, generally use sand mixer mixing into the old figure and amount of clay. Molding stage 2: according to the drawings to make mold and core box, general piece can use wood pattern, mass production can produce plastic mould or metal mould ( Commonly known as iron mould or die) To produce plate, large quantities of castings. Mold base is done with engraving machine now so greatly shorten the production cycle, moulding need commonly 2 ~ 10 days. 3, the modelling ( Core) Phase: including the modelling ( The use of green sand casting formation of cavity) And core ( Form the internal shape of the casting) , mold fitting ( Put the palatial core in the cavity, the sand box up and down together) 。 Modelling is a key link in casting. Smelting stage 4: according to the need of metal components with good chemical composition, choosing appropriate melting furnace melting alloy material, form qualified liquid metal liquid ( Including composition of qualified, qualified temperature) 。 Smelting generally adopting cupola and electric furnace ( Due to environmental requirements, cupola now basic outlawed and use the electric stove) 。 Stage 5, pouring: the melt in the furnace of molten iron with hot metal ladle injection type built in. Pouring molten iron need to pay attention to the speed of pouring, molten iron to fill the cavity. Another pouring molten iron more dangerous need to pay attention to safety! Clean up the stage 6: after casting, melt metal solidification, took a hammer to cut off the sprue and blow casting sand, and then use the sandblasting sandblasting machine, so that the casting surface will appear very clean! Not strict on casting blank on examination of the basic can go to the factory. 7, casting processing, has the special requirements for some casting or some casting can not meet the requirements of the castings, may require simple processing. Generally use grinding or polishing machine for processing and grinding, remove burrs, let the castings more bright and clean. 8, casting inspection, casting inspection in the process of cleaning up or processing stage, generally unqualified has found commonly carry out. But there are some castings have individual requirements, need to check it again. Such as need some castings can be inserted into the center hole axis 5 cm, you need to take 5 cm axis to wear a try. That is about foundry casting process is introduced, hope can help to you. Today small make up to you at this point, let's see you next time.
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