Split type sand core for back cover casting of construction machinery

Abstract

The invention relates to a split type sand core for back cover casting of construction machinery. The split type sand core is characterized by comprising a sand core seat, a sand mold, a sand core group and a sand core group connecting block. The sand mold is arranged on the sand core seat, one end of the sand core group is connected with the sand core group connecting block, the other end of thesand core group is connected with the sand core seat, and the side edge of the sand core group is connected with the sand mold. The combination between the sand mold and the sand core group is used asa casting for an engineering machinery back cover, a hollow type sand core structure is adopted to enable the sand core to be relatively light, and the use amount of sand is reduced, the cost is reduced, a reasonable typing position is chosen, the number of core assemblies is minimized by reducing the use of movable blocks, and the production process of construction machinery back cover is simplified; and a spilt type structure is adopted, burrs of the casted construction machinery back cover are less, and subsequent processing is convenient.

Description

technical field [0001] The invention relates to the field of casting, in particular to a split sand core for casting the rear cover of engineering machinery. Background technique [0002] Generally, the back cover of construction machinery is formed by casting. The inner cavity of the casting sand core is relatively complex, which contains a large number of raised blocks, many large holes communicating with the outside world, and there are generally many holes between the sand box shells. A positioning block divides the cavity formed by the sand box into two, in addition to the sand core, which adds difficulty to the design of the sand core. At present, there are many sand core assembly processes for the back cover of traditional construction machinery, and a lot of loose blocks and sand cores are needed. The disadvantage of this traditional sand core structure is that it requires more open core boxes and more loose blocks. Production The process is complicated, time-consum...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a split sand core for casting the back cover of construction machinery, which can solve the problem of large amount of sand used in the casting mold in the back cover of general construction machinery, many sand cores, many loose pieces and high cost. And the problem of too many burrs that are difficult to process due to the use of a monolithic structure

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