Method and sand core assembly for rapid casting of distributor of engine for large ships

Abstract

The invention discloses a method for rapid casting of a distributor of an engine for large ships. The casting method comprises the following steps: a casting runner is formed in one side of a sand core group, a vertical inner gate aligned to a vertical interlayer die cavity in a cavity of the sand core group and a transverse inner gate aligned to a transverse interlayer die cavity in the cavity ofthe sand core group are formed in the casting runner, and molten iron flows into the casting runner and fill the cavity of the sand core group via the vertical inner gate and the transverse inner gate. The invention further discloses a sand core assembly for rapid casting of the distributor of the engine for the large ships. According to the method and sand core assembly for rapid casting of thedistributor of the engine for large ships, the vertical inner gate is aligned to a vertical oil-water channel interlayer of the distributor in the die cavity and the transverse inner gate is aligned to a transverse oil-water channel interlayer of the distributor in the die cavity, smooth and rapid molten iron filling can be guaranteed effectively, the oil-water channel interlayer of the inner cavity is fully filled, and the sealing performance of the oil-water channel interlayer is guaranteed, so that the casting quality of the distributor is guaranteed.

Description

technical field [0001] The invention relates to the technical field of engine component installation, more specifically, it relates to a rapid casting method of a distribution body of a large marine engine and a sand core assembly. Background technique [0002] The engine thermostat assembly is a key component of the entire diesel engine, its main function is to ensure that the heat generated by the engine can be dissipated in time, to meet the temperature control requirements of the engine, and to ensure that the engine works at the most suitable temperature state, thereby Get the best performance out of your engine. The engine distribution body is an important part of the thermostat assembly, and its main function is to distribute the direction of the fluid, so as to ensure the cooling and lubrication of the engine during normal operation. [0003] In large marine engines, water cooling is generally used for engine cooling, and engine oil is used for lubrication, so the f...

AI Technical Summary

Problems solved by technology

[0006] (1) Due to the presence of criss-crossed oil-water channel interlayers, it is difficult to ensure smooth filling of molten iron during pouring, oil-water channel interlayers are prone to insufficient filling, and castings are prone to casting defects such as wall penetration, shrinkage porosity, and cold shut;

[0007] (2) Due to the limitations of the independent water flow channel and oil channel structure, there are few installation and positioning points for a single sand core, and the positioning of a single sand core is inaccurate, difficult to fix and unstable;

[0008] (3) Due to the limitation of the structure of the water flow channel and the oil channel, the number of sand cores in the casting process of the distribution body is often large, and the more sand cores, the more difficult it is to assemble the cores

The water flow channel and the oil channel of the distribution body are independent of each other, and the position where the core head can be arranged is very limited. When assembling the core, problems such as difficulty in assembling the core and poor accuracy of the core are likely to occur;

[0009] (4) The applicability of the existing casting process and forming method is limited to distribution body castings with ordinary structure. For some special structures, according to the traditional core assembly method, some sand cores cannot be assembled at all, even if they can barely be assembled. , the core assembly efficiency is low and very low;

[0010] (5) Poor dimensional accuracy of castings, high scrap rate and high casting cost

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