Anti-drift core and anti-bending core bone for sand core of volute castings

Abstract

The invention discloses a core drifting-prevention and bending-resistance arbor for a volute type casting sand core. The arbor comprises an inner-layer arbor skeleton, a middle arbor skeleton, an outer-layer arbor skeleton, first connecting ribs and second connecting ribs; multiple first connecting ribs are connected between the inner-layer arbor skeleton and the middle arbor skeleton; multiple second connecting ribs are connected between the middle arbor skeleton and the outer-layer arbor skeleton; the outer-layer arbor skeleton includes a starting end, a tail end, a main section positioned between the starting end and the tail end, and a straight section connected with the tail end; a first positioning structure is arranged in the circle center of the inner-layer arbor skeleton; and a second positioning structure is arranged at the tail end of the straight section of the outer-layer arbor skeleton. The core drifting-prevention and bending-resistance arbor can effectively prevent cracking of the sand core, guarantees the quality of the sand core, can effectively resist buoyancy from molten iron in the pouring process, guarantees no deformation of castings, and effectively solves the core drafting and rapture problems of the sand core of volute type products.

Description

technical field [0001] The invention relates to the technical field of using core bones in sand core casting, in particular to an anti-floating core anti-bending core bone for sand cores of volute castings. Background technique [0002] In the process of casting production, some castings are restricted by the structure of the casting, and the sand core will be subject to a large buoyancy force after the molten iron enters the cavity, which will cause problems such as floating core or even sand core fracture. [0003] This problem is particularly prominent in large-scale volute products, because the sand core of volute castings has a large horizontal cross-section, and the sides are suspended structures, the connection between the middle part of the sand core and the side structure is thin, and the sand core has only A core head in the middle is used as a support, and the buoyancy of the molten iron can easily cause the floating core or even the sand core to break. [0004] ...

AI Technical Summary

Problems solved by technology

[0010] The anti-floating core anti-bending mandrel for the sand core of the volute casting can effectively prevent the sand core from cracking and ensure the quality of the sand core; it can effectively resist the buoyancy from the molten iron during the pouring process, thereby ensuring that the casting will not Deformation; effectively solves the problem of sand core drift and fracture of volute products, and at the same time simplifies on-site operation, improves production efficiency, reduces production costs, and improves product quality

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