Combined member comprising sand core and core support

Abstract

The invention discloses a combined member comprising a sand core and a core support. The combined member comprises a core support and a sand core, wherein the core support comprises a support body; a support head is arranged at the top end of the support body; an inner clamping arc surface is arranged in the support body; two clamping parts, which are relatively parallel, are arranged at the tail end of a clamping arc; free ends are arranged on the clamping parts; the sand core comprises a core body; a plurality of core slots are formed in the core body; stop openings are formed in the core slots; protrusions are formed in junctions between the planes at one ends of the stop openings and the outer arcs of the core slots; an included angle between the two planes of the protrusions and the stop openings is 40-50 degrees; the sizes of the stop openings are slightly smaller than the width between two clamping parts. The sand core of the member is rigidly contacted with the core support; the combined structure is good in rigidity and high in core support strength; the good effect of supporting the sand core through the core support is achieved; meanwhile, the core support can be manufactured by using common materials and common processes; the combination and assembly of the sand core and the core support can be carried out by manual or simple mechanical devices; the member is low in manufacturing cost and installing cost.

Description

technical field [0001] The invention belongs to a casting device, in particular to a combined component of a sand core and a core support. Background technique [0002] In the process of casting production, the sand core is mainly fixed by the core head in the cavity, but sometimes it is difficult to stabilize the sand core only by the core head positioning, so the core support is often used to reinforce the sand core in production to play the role of auxiliary support. [0003] In the application of the core support, attention should be paid to two aspects of strength and fusion with the casting body. First of all, before the casting in the cavity is completely solidified, the core support itself should have sufficient strength, and it should not be melted prematurely in the cavity to reduce the strength and cause the core support to lose its supporting effect on the sand core; the second is the core support. Poor fusion with the casting may cause porosity, or non-fusion, ...

AI Technical Summary

Problems solved by technology

First of all, before the casting in the cavity is completely solidified, the core support itself should have sufficient strength, and it should not be melted prematurely in the cavity to reduce the strength and cause the core support to lose its supporting effect on the sand core; the second is the core support. Poor fusion with the casting may cause porosity, or non-fusion, causing fatal defects in the section of the casting

[0004] The existing commonly used core support structure is to use elastic core support to strengthen the sand core. The elasticity of the core support of this reinforced structure is relatively good, but its disadvantage is that the rigidity of the core support is relatively poor, and the strength of the core support itself is not enough. It is easy to cause the loss of the supporting effect of the core support on the sand core; and because the core support needs to be made into an elastic structure, higher requirements are put forward for the production material and manufacturing process of the core support. Special mechanical equipment is required for auxiliary installation, which consumes a lot of manpower and material resources

Images