Casting riser induction heating device, and casting riser induction heating method

Abstract

The invention discloses a casting riser induction heating device. The casting riser induction heating device comprises a riser sleeve; an annular sleeve prepared of graphite, steel, or other conductive materials; an induction coil; a thermoelectric couple; water cooled cables; a temperature recorder; and an induction heating power supply cabinet. Compared with conventional insulated risers and exothermic risers, the casting riser induction heating device possesses following advantages: riser setting time prolonging effect is more excellent than that of the conventional insulated risers and exothermic risers; real-time control on the temperature of molten metal in risers can be realized; recycling of induction heating risers can be realized; production cost is reduced; no environmental pollution is caused in using process; and environmental requirements are satisfied preferably.

Description

technical field [0001] The present invention relates to the machinery manufacturing industry, in particular to a riser induction heating method and its process device suitable for casting production in the foundry field. By adjusting the input power of the electromagnetic induction coil, the molten metal in the riser of different sizes is induced. Heating can improve the feeding efficiency of the riser, reduce the size of the riser, save materials and energy, reduce the shrinkage cavity and shrinkage defects of the casting, and improve the internal quality of the casting. Especially suitable for risers of large steel castings. Background technique [0002] In the casting production process, generally a certain number and size of risers should be set up to supplement the molten metal required for the casting to solidify and shrink, to avoid shrinkage cavities and shrinkage defects in the casting, and to ensure castings with good internal quality. The volume and quantity of t...

AI Technical Summary

Problems solved by technology

In fact, in the casting production process, when the molten metal is poured, the high-temperature molten metal encounters the low-temperature riser cup, and under the chilling effect, a solid metal shell will be formed near the outer wall of the riser cup, directly reducing the The feeding efficiency of the molten metal in the riser, at the same time, the solidified shell will also hinder the downward flow of the molten metal and affect the feeding effect

In addition, when pouring molten metal, a large amount of heat will be lost during the process of filling the molten metal in the riser, resulting in a rapid drop in the temperature of the molten metal in the riser, especially for the production of large castings, often requiring a long pouring time

These will greatly reduce the feeding efficiency of the riser

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