Casting method of stack sand splicing mold

Abstract

The invention discloses a casting method of a stack sand splicing mold and belongs to the field of casting. The method comprises: (1) designing castings required to be manufactured, and producing a plurality of intermediate models which are split horizontally; (2) placing the intermediate models into a stack box and pouring sand moldings, opening pouring ports and exhaust ports on the sand molds after drawing, standing for curing, and brushing a layer of charcoal on the surfaces of the sand molds; and (3) stacking the sand molds according to the casting design, aligning the pouring port with the exhaust port, and pouring to prepare the castings. According to the method provided by the invention, because the intermediate molds and stacking sand molds are adopted, the master of accuracy of the castings with complex surfaces is good, and the molding effect of the castings is improved; the surfaces of the castings are more smooth and have high molding degree; and the method can be used for producing large and medium-sized castings, and large processing equipment is not required.

Description

technical field [0001] The invention relates to the field of casting, in particular to a laminated sand casting method. Background technique [0002] In terms of casting technology, sand casting is generally not limited by the shape, size and complexity of parts, and has a wide source of raw materials, quick results, and low cost. At present, castings produced by sand casting technology account for more than 80% of the total output of castings. There are many manual molding methods for sand casting, including integral mold molding, sand digging molding, fake box molding, multi-box molding, split box molding, stacked box molding, etc. Molten iron can produce castings with complex structures by using stacked box molding, and can also use one pouring to complete the manufacture of several castings at the same time. However, the upper and lower layers of castings produced by this method are different, and the lower layer of castings is prone to box expansion and collapse due to ...

AI Technical Summary

Problems solved by technology

For the existing small and medium-sized casting processing factories, it is very difficult to produce larger castings, and the production cost is high. The production of mass production and high-precision castings remains at a relatively primitive level. Casting precision is not easy to grasp