Square hole vacuum casting mould assembly

Abstract

The invention relates to a square hole vacuum casting mould assembly which is suitable for the vacuum casting technology. A mould main body is composed of an inner mould and an outer mould, and an inner mould groove and an outer mould groove are arranged on the contact surface formed by the inner mould and the outer mould or the outer mould and the outer mould to form a mould cavity. The diameter of the bottom surface of the head portion of a graphite cover is larger than the circle of a central hole, and the handle portion of the graphite cover is inserted into the central hole at the center of the inner mould. A graphite ring is positioned on the mould main body, the head portion of the graphite cover is arranged in the graphite ring, and the gap between the graphite ring and the head portion of the graphite cover is communicated with the mould cavity. A casting cover covers the mould main body, and the graphite ring is clamped in a central hole of the casting cover. The square hole vacuum casting mould assembly can cast a plurality of castings by one time, is simple and reasonable in structure, performs mould assembly and disassembly conveniently, and is particularly suitable for volume-producing the castings with simple structures. The graphite cover has a buffering function and reduces heat shock of melt fluid on the mould cavity wall and the combination surface, service life of a mould is prolonged, and ingot castings with good mechanical processing performance can be obtained.

Description

technical field [0001] The invention relates to a square hole vacuum casting mold assembly, which is mainly suitable for vacuum casting technology and belongs to the field of casting molds. Background technique [0002] In the prior art, in order to ensure the stability and convenience of the production operation, the production of electric vacuum brazing filler metal strips and welding sheets generally adopts continuous rolling of square ingots to obtain thin sheets, because compared with round ingots, square ingots are rolled The process is more stable and easy to control. However, in order to ensure the pressure processing performance and production efficiency during ingot processing and the microstructure and surface quality of the rolled strip, it is necessary to reasonably design the mold cavity size and the cavity spacing to obtain the as-cast microstructure. Better ingots. [0003] Traditional molds generally consist of one workpiece and one pair of molds. For vacu...

AI Technical Summary

Problems solved by technology

[0003] Traditional molds generally consist of one workpiece and one pair of molds. For vacuum smelting, casting of multiple square ingots requires multiple sets of casting molds to be cast in turns on the turntable. waste of

[0004] For the existing combined casting mold, although multiple workpieces can be realized in one pair of molds, the structure is relatively complex, the mold production cost is high, the assembly process is complicated, the assembly precision is high, assembly misalignment is easy to occur, and demoulding is relatively complicated , affects the overall operation speed, so it is not suitable for casting castings with simpler structures

For castings with simple structure and uniform wall thickness, the top pouring method with simple molding process and convenient mold manufacturing is generally used. Fast, but the thermal impact on the mold wall is also large, and the filling process is not stable, and defects such as slag inclusions will occur

[0005] On the other hand, metal molds should generally be made of metal materials with good thermal conductivity and good mechanical properties, because the mold will undergo repeated heating and cooling during use, which will cause growth and increase the volume. Density decreases, strength decreases, cracks and cracks in the internal cavity are prone to occur, which will increase the internal pores of the ingot and affect the performance of the ingot

[0006] Chinese Patent No. 201010517266 discloses a patent titled "A Vacuum Casting Mold Assembly". This mold can cast multiple ingots at one time, but it injects the melt into the ingot mold through the middle injection pipe and the channel structure. The mold structure The design is complicated and the structure is not tight enough, and the above-mentioned defects in the prior art are not overcome

[0007] Chinese Patent No. 201220211292 discloses a patent named "Vacuum Ingot Casting Device". The mold is equipped with a turntable. There are multiple ingot molds on the turntable. The melt is injected into the ingot mold from the vacuum box through the ingot tube and can be rotated by the turntable. Casting multiple ingots, but its structural design is more complex, and it also needs to drive the turntable, which requires high positioning accuracy, and does not overcome the above-mentioned defects in the prior art

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