Casting process for casting motorcycle engine cylinder block

Abstract

The invention discloses a casting process for casting a motorcycle engine cylinder block. The evaporative pattern casting process is adopted for casting the motorcycle engine cylinder block, so that the traditional sand shakeout and decoring procedures are omitted thoroughly, treatment cost is lowered, mold cost is lowered, high-precision castings are produced repeatedly one hundred percent, and the wall thickness error is controlled within + / - 0.5 mm. The casting process includes the following specific steps that a foam plastic gasifiable pattern is manufactured; the motorcycle engine cylinder block pattern is subjected to foam plastic gasification, and then the foam plastic gasifiable pattern is combined and dried; fireproof paint is brushed or sprayed on the surface of the foam plastic gasifiable pattern, and then the foam plastic gasifiable pattern is dried again; a special sand box for containing the motorcycle engine cylinder block is placed on a three-dimensional vibration compacting table and filled with bottom sand, and then vibration compacting and strike-off are carried out; the dried foam plastic gasifiable pattern is placed on the bottom sand, layer-by-layer sand filling is carried out according to process requirements, and strike-off is carried out on the opening of the box after automatic vibration compacting; and the opening of the sand box is covered with a plastic thin film, a sprue cup is placed, and an evaporative pattern is obtained and connected with a negative pressure system.

Description

technical field [0001] The invention relates to the fields of casting technology and the like, in particular to a casting process for casting motorcycle engine cylinder blocks. Background technique [0002] Casting - smelting metal, making casting molds, pouring molten metal into casting molds, and obtaining metal parts blanks with certain shape, size and performance after solidification. [0003] Casting is the process of smelting metal into a liquid that meets certain requirements and pouring it into a mold, cooling and solidifying, and cleaning to obtain a casting with a predetermined shape, size and performance. Because the casting blank is almost shaped, the purpose of free machining or a small amount of machining reduces the cost and reduces the production time to a certain extent. Casting is one of the basic processes of the modern device manufacturing industry. [0004] Casting is a kind of metal thermal processing technology mastered by human beings earlier, with a...

AI Technical Summary

Problems solved by technology

[0035] Disadvantages: 1. The mechanical properties are not as good as forgings, such as coarse structure and many defects;

[0036] 2. In sand casting, single piece and small batch production, the labor intensity of workers is high;

[0037] 3. The quality of castings is unstable, there are many processes, the influencing factors are complex, and many defects are prone to occur

[0047] Casting production has different characteristics from other processes, mainly because it has wide adaptability, requires more materials and equipment, and pollutes the environment.