Iron pattern sand-coating method for steel casting

Abstract

The invention discloses an iron pattern sand-coating method for a steel casting, and belongs to the technical field of steel casting production. The iron pattern sand-coating method for the steel casting can realize the purpose that a special easy-drying mold core assembly is arranged, and the easy-drying mold core assembly, an upper iron pattern and a lower iron pattern are combined together to be subjected to the procedures of sand shooting and drying, and an easy-drying mold core in the easy-drying mold core assembly not only can play a role of a mold core, but also can be matched with the upper iron pattern and the lower iron pattern to manufacture a sand coating layer matched with the casting; meanwhile, the easy-drying mold core can play excellent roles in heat conduction and air exhaust, so that the sand coating layer can be dried more uniformly and thoroughly, then the defects of sand inclusion, sand burning, air holes, pinholes and the like can be remarkably reduced, and the casting quality is greatly improved; and through combined arrangement for a fixed screw rod, a linkage shaft, a driven gear and the like, the combination of the easy-drying mold core assembly, the upper iron pattern and the lower iron pattern is simple and convenient, so that the practicability of the easy-drying mold core assembly is greatly improved, the process flow is simplified, and the production efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of steel casting production, in particular to a sand-coating method for iron molds of steel castings. Background technique [0002] Iron mold sand-coating is a casting production technology, which is different from sand casting, lost foam casting, V method casting, metal casting, shell casting, paraffin casting, ceramic casting, steel shot casting and other casting methods. A semi-precision casting method. Iron mold sand-covered casting has the characteristics of sand casting, that is, there is a rigid sand mold shell, which makes the overall strength of the sand mold high and does not deform. It has wide adaptability, easy demoulding of castings, reliable positioning and high precision. [0003] Steel castings refer to parts made of cast steel, which have similar properties to cast iron, but are stronger than cast iron. One of the advantages of steel castings is the flexibility of design. Designers have th...

AI Technical Summary

Problems solved by technology

[0004] The iron mold sand-coating process in the prior art is prone to defects such as sand inclusions, sand sticking, pores, and pinholes when producing steel castings. The main reason for the above defects is that the sand-coating layer is baked unevenly and thoroughly.

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