Casting process for cylinder sleeves

Abstract

The invention discloses a casting process for cylinder sleeves. The process includes the steps: making a mould for the cylinder sleeves; making a mould joint with a side gate according to casting specifications to obtain a molding box of an external mould, a positioning core and a gate core; arranging a gate and a feed head on the mould; adding clay sand into the mould for clay sand molding, and matching 1.25-1.45% of furan resin and sulfonic acid accounting for 30-60% of the resin to serve as curing agents; patching the molded clay sand mould and brushing coating on the surface of the same; subjecting the clay sand mould to mould matching and mould assembling; pressing the clay sand mould; placing a pouring cup on the pouring gate of the mould and placing a feed head cup on the feed head; and pouring melted iron into a cavity of the clay sand mould by a crane ladle for casting. The casting process for the cylinder sleeves has the advantages of short period, high work efficiency, low cost and wide application range in mould manufacturing.

Description

Technical field: [0001] The invention relates to a casting process of a cylinder liner. Background technique: [0002] At present, the conventional method of producing cylinder liner castings is centrifugal casting, but because the material needs to be boron cast iron or various alloy cast irons, but boron cast iron is prone to deflection, and deflection occurs at the final solidification point, and its cooling direction is from Outside to inside, the inner hole cools last and is therefore prone to deflection. At the same time, due to the effect of centrifugal force, non-metal oxides and slag inclusions are adsorbed on the inner hole of the cylinder liner. After the inner hole is processed, casting defects of different degrees appear, such as slag inclusions, oxides, white spots, etc. . Invention content: [0003] The object of the present invention is to overcome the above disadvantages and provide a casting process for cylinder liners that does not produce deflection, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the conventional method of producing cylinder liner castings is centrifugal casting, but because the material needs to be boron cast iron or various alloy cast irons, but boron cast iron is prone to deflection, and deflection occurs at the final solidification point, and its cooling direction is from Out-to-in, the inner hole cools last and is prone to deflection