Step type sand core mold

Abstract

The invention discloses a step type sand core mold. The step type sand core mold comprises a metal outer frame, a core box body, two baffles and an ejection mechanism. The metal outer frame comprises a bottom plate and side plates. A plurality of ejector core rod holes penetrating the upper surface and the lower surface of the bottom plate are formed in the middle of the bottom plate. The four side plates are fixedly arranged on the upper surface of the bottom plate. All the side plates are connected end to end to form a containing cavity of the core box body. Upwards-extending sand core protruding side plates are correspondingly arranged in the middles of the top ends of two opposite side plates and provided with sprue mold sample penetrating holes, and sprue mold samples are arranged in an inserted manner. The core box body is made of plastic, and a sand core body cavity is formed in the middle of the core box body. Each baffle is in a long-strip plate shape, and the two baffles are distributed on the two sides of the sand core protruding side plates of the metal outer frame to form a sand core protruding cavity. According to the step type sand core mold, the labor intensity of workers is relieved, and the efficiency of core manufacturing and core assembling is effectively improved.

Description

technical field [0001] The invention relates to the field of engine sand casting, in particular to a stepped sand core mold. Background technique [0002] At present, the manufacture of heavy-duty diesel engines, especially large-scale marine diesel engines, is all sand casting. The sand core, due to its large size and complex structure, cannot be produced online through mold equipment, and most of them are manually made by designing some manual core boxes such as aluminum molds, wooden molds, and plastic molds. [0003] The handmade core boxes used in the manufacture of sand cores are generally composed of multiple core boxes that are spliced ​​and fixed together. The core making process of the manual core box is usually filled with self-setting sand in the cavity of the core box by the workers, and the surface of the core box is scraped; after the self-setting sand in the core box is solidified, the core box is disassembled and taken out sand core. [0004] In the proce...

AI Technical Summary

Problems solved by technology

[0007] 1. The core box of the mold is an inlaid core box composed of multiple loose pieces. The loose pieces of the core box need to be disassembled and assembled during the core making process, and the operation is cumbersome

[0008] 2. The sand higher than the core box needs to be scraped flat, which brings limitations to the core making of the manual core box: the outer surface of the sand core must be flat, otherwise the sand cannot be scraped

Splicing sand cores will affect the efficiency of core assembly

[0009] 3. During the coring process, workers need to turn the core box over and disassemble the core box in a certain order.

The core box with a sand core has a large size and a relatively heavy weight. The flipping of the core box requires a lot of manpower and material resources

[0010] It can be seen from the above points that the existing manual core boxes not only increase the labor intensity of workers, but also seriously affect the efficiency of sand core production and assembly, and cannot meet the mass production requirements of heavy-duty diesel engines, especially large-scale marine diesel engines.

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