Method for producing truck push rod support through iron mold sand coating casing

Abstract

The invention discloses a method for producing a truck push rod support through iron mold sand coating casting. An inner cavity of an iron mold is manufactured according to the shape of the truck push rod support in a following manner, the thickness of a following sand coating layer ranges from 7 mm to 8 mm, and a closed sprue is adopted; air hole needles are arranged on a jet hole in the highest position and peripheral core heads of an upper half die sample, and an exhaust groove is formed in a parting face of the iron mold; heating devices are arranged in the middle of an upper die bottom plate and the middle of a lower die bottom plate of an outer die correspondingly, and sand jetting is conducted after the temperature reaches the requirement; and core loading, box closing, casting and box opening are conducted after a sand core is manufactured. By the adoption of the method, the yield is increased to 83% or higher of iron mold casting from 65% of original sand mold casting, the defects of subskin porosity, organization looseness and the like are overcome, the problem of cracking of the truck push rod support during work is solved, the overall mechanical performance is improved, sand treatment equipment, fields and the sand use amount are reduced, and the severe casting environment is improved; and the technological processes are simple, control is easy, and the production cost is lowered than that of sand mold casting by 30%-50%.

Description

technical field [0001] The invention belongs to the field of casting technology for producing truck push rod brackets, in particular to a production method of iron mold sand-covered casting truck push rod brackets. Background technique [0002] Iron mold sand-covered casting is a casting process in which a 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 castings produced by this process have the advantages of high dimensional accuracy, clear outline, 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 tracks and motor bases....

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a production method of iron mold sand-coated casting truck push rod brackets, which solves the common problems of ductile iron truck push rod brackets such as loose tissue, poor surface quality, and unguaranteed overall mechanical properties. The process flow is simple, easy to control and reduce costs

Images