Sand core mold for large diesel engine high temperature cooler

Abstract

The invention discloses a mould of a high-temperature cooler sand core in a large diesel engine. The mould comprises a core box outer frame, a core box wear-resistant piece and a plurality of side surface loose pieces, wherein the core box outer frame comprises a bottom plate and a side wall extending upwards along the periphery of the bottom plate, the bottom plate and the side wall define a cavity of the high-temperature cooler sand core, and a plurality of yielding loose piece-shaped surfaces are arranged at the periphery of the cavity; the core box wear-resistant piece is designed to be matched with the top end of the side wall of the core box outer frame in shape and is fixedly arranged at the top end of the side wall of the core box outer frame; the side surface loose pieces are arranged in the yielding loose piece-shaped surfaces of the core box outer frame, and the inner side surfaces of the side surface loose pieces define a cavity side wall of the core box outer frame. According to the mould, the total weight of the mould can be reduced, the manufacturing cost can be saved, and the labor intensity can be lowered; a core box adopts a full-fall type loose piece structure, so that the mould can be released from a plurality of angles, the problem that the sand core cannot be smoothly demoulded is effectively solved, the operation is convenient and flexible, complete demoulding can be achieved, and the core-making efficiency is high; moreover, the made sand core is small in deformation and good in sizing precision.

Description

technical field [0001] The invention relates to the field of large diesel engines, in particular to a sand core mold for a high temperature cooler of a large diesel engine. Background technique [0002] The structure of the front-end box of the existing large diesel engine is illegally complicated, and its internal structure is arranged compactly, such as figure 1 As shown, the high-temperature cooler sand core of the front end box of the large diesel engine is independent, with a length of more than 980 mm and a width of more than 750 mm. The spatial shape is a J-shaped large-angle curved structure, and has a first shape surface 11 and a second shape surface 12. The third shape surface 13, the fourth shape surface 14, the fifth shape surface 15, the sixth shape surface 16, the seventh shape surface 17, the eighth shape surface 18, the ninth shape surface 19 and the tenth shape surface 20, resulting in a more complex shape. [0003] Small-power diesel engine sand cores mos...

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Problems solved by technology

[0002] The structure of the front-end box of the existing large diesel engine is illegally complicated, and its internal structure is arranged compactly, such as figure 1 As shown, the high-temperature cooler sand core of the front end box of the large diesel engine is independent, with a length of more than 980 mm and a width of more than 750 mm. The spatial shape is a J-shaped large-angle curved structure, and has a first shape surface 11 and a second shape surface 12. The third shape surface 13, the fourth shape surface 14, the fifth shape surface 15, the sixth shape surface 16, the seventh shape surface 17, the eighth shape surface 18, the ninth shape surface 19 and the tenth shape surface 20, resulting in a more complex shape

[0003] Sand cores of low-power diesel engines mostly adopt core-shooting machine cores, and sand cores of high-temperature coolers in front-end boxes of large-scale diesel engines are easily deformed and difficult to demould due to their long size. Difficulty in mold design

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