Lost foam-graphite chilling-antigravity casting process for railway cast-steel wheels

A technology of anti-gravity casting and lost foam casting, which is applied in the manufacture of tools, casting molding equipment, casting molds, etc. It can solve the secondary oxidation of molten steel, the low recycling rate of water glass sand, and the impact of waste sand discharge on the surrounding ecological environment, etc. problems, to achieve the effect of reducing consumption and discharge of waste sand, and reducing the impact on the ecological environment
CN107584086AInactive Publication Date: 2018-01-16信阳同合车轮有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
信阳同合车轮有限公司
Publication Date
2018-01-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a lost foam-graphite chilling-antigravity casting process for railway cast-steel wheels. The lost foam-graphite chilling-antigravity casting process integrates lost foam casting technology, graphite chilling casting technology and antigravity casting technology into one. According to the process, a graphite ring ready to mold is fixed in a lost foam casting sandbox via bolts; prepared and molded riser foam and wheel foam patterns are bonded with an assembly of an ingate, a casting pipe, a stopper plug and a stopper rod and are then put in the graphite ring; the lost foam casting sandbox is filled with dry sand and is then connected with a negative pressure device after vibration compaction; the sandbox is put on the top of the cover of a prepared pressure tank; a riser tube arranged on the cover of the pressure tank is communicated with the casting pipe; a steel ladle is arranged in the pressure tank; the riser tube is inserted into the steel ladle; air or inertgas is pressed in the pressure tank; and wheel casting is carried out. The lost foam-graphite chilling-antigravity casting process provided by the invention overcomes the problems of the low recoveryand utilization rate of sodium silicate sand in conventional production processes for railway cast-steel wheels, influence of high waste-sand discharge on surrounding ecological environment and secondary oxidation of molten steel caused by casting of bottom-pouring ladles.
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Description

technical field

[0001] The invention relates to the technical field of railway cast steel wheel production, in particular to a lost foam graphite chilled anti-gravity casting process for railway cast steel wheels. Background technique

[0002] At present, domestically produced railway cast steel wheels all adopt the shape of graphite-type hanging sand lining and the technology of bottom pouring ladle pouring. The central riser is centrally fed, which can realize sequential solidification from the rim to the spoke plate and then to the hub, and the rim structure is dense. The technology is mature and the product quality is stable. However, the sand lining of the graphite type is sodium silicate sand, and the average consumption of quartz sand for a single wheel is about 90kg. According to the annual output of 250,000 wheels, the annual consumption of quartz sand is nearly 22,500 tons, and the volume is quite huge. In the long run, quartz sand is a non-renewable resource, a...

Claims

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