Gravity casting technique for crane wheel by hanging sand linings on graphite molds

Abstract

The invention discloses a gravity casting technique for a crane wheel by hanging sand linings on graphite molds. The gravity casting technique comprises the specific steps that the upper box graphitemold provided with an upper box top plate, an upper box pouring jacket and an upper bolt, and a lower box graphite mold provided with fixed square steel, a lower box pouring jacket and a lower bolt are prepared; after baking is conducted to the set temperature, the sodium silicate-bonded sand upper box sand lining and the sodium silicate-bonded sand lower box sand lining are made in a shot mode through a sand shooter, and the set flow of CO2 is blown in for hardening demolding; the upper box sand lining and the lower box sand lining are reserved on the upper box graphite mold and the lower boxgraphite mold through sand hanging grooves correspondingly, a rim graphite core is placed at the rim part of the lower box graphite mold, a technical hole sand core and a central core which are madeof resin sand are placed at the lower box sand lining, and a rain core and a floating core which are made of resin sand are placed at the upper box sand lining; and after box closing, the wheel is poured through a bottom pouring ladle. The problems that in a traditional crane wheel casting production technique, the surface quality of a wheel is poor, the dimensional precision is low, internal quality uniformity is poor, and large-batch efficient production is quite difficult to achieve are solved.

Description

technical field [0001] The invention relates to the technical field of crane wheel casting technology, in particular to a graphite-type sand-lined gravity casting technology for crane wheels. Background technique [0002] At present, domestic casting crane wheels mostly use ordinary water glass sand or resin sand casting technology, low-efficiency manual molding, coupled with rough mold quality, most of the produced wheels have poor surface quality, low dimensional accuracy and poor internal quality consistency, etc., and It is difficult to achieve high-volume high-efficiency production. Contents of the invention [0003] The purpose of the present invention is to provide a gravity casting process for crane wheels with graphite type hanging sand lining, which solves the problems of poor wheel surface quality, low dimensional accuracy, poor internal quality consistency and difficulty in achieving large batches and high The problem of efficient production. [0004] In ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a gravity casting process for crane wheels with graphite type hanging sand lining, which solves the problems of po

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