Production method for sand lined iron mould casting nodular cast iron bus installing plate

Abstract

The invention discloses a production method for a sand lined iron mould casting nodular cast iron bus installing plate. An iron mould inner cavity is manufactured in a following mode according to the shape of the bus installing plate, the thickness of a following sand lining layer is 10-30 mm, and a closed type sprue is adopted. Exhausting of a casting mould is achieved directly through a perforation hole, an independent exhausting passage is not needed, and an exhausting groove is formed in a joint face of an iron mould. Heating devices are arranged in the middles of bottom plates of an upper mould body and a lower mould body of an outer mould correspondingly, and sand jetting is conducted after the temperature meets the requirement. Casting mould trimming, mould assembling, pouring and mould opening are conducted. By means of the method, the yield is improved to 75% or above through iron mould casting from original 50% through sand mould casting, the defects of subsurface blowholes and a loose structure are eliminated, the problems of leakage and insufficient strength of the bus installing plate in a high-pressure and high-intensity work environment are solved, the overall mechanical performance is improved, and sand treatment equipment, sites and the sand use amount are reduced. The bad casting environment is improved. The process is simple and easy to control, and the production cost is lowered by 30-50% compared with sand mould casting.

Description

technical field [0001] The invention belongs to the field of casting technology for producing passenger car mounting plates, in particular to the field of a production method for casting ductile iron passenger car mounting plates covered with sand in iron molds. Background technique [0002] Iron mold sand-coated casting is a casting process in which a thin layer of molding sand (also known as coated sand) is covered around the inner cavity of a metal mold (also known as iron mold). It is a combination of metal mold casting and shell casting. The obtained castings have the advantages of high dimensional accuracy, good mechanical properties, saving labor, materials and equipment, and low production costs. [0003] In foreign countries, Germany, the former Soviet Union and other countries began to apply iron sand-covered casting to production around the 1960s, mainly for the production of ductile iron crankshafts, brake hubs, brake discs, cylinder liners, bomb shells, tank tr...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a production of iron mold sand-coated cast passenger car mounting plates that can solve the common problems of nodular cast iron passenger car mounting plates, such as poor structure and performance, internal looseness, surface quality, and overall mechanical properties cannot be guaranteed. method

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