Reproducing method of molding sand

A technology for foundry sand and sand molds, which is applied in foundry molding equipment, machinery for cleaning/processing mold materials, and manufacturing tools, and can solve problems such as shortening the use time.
CN103567376AInactive Publication Date: 2014-02-12ASAHI TEC CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ASAHI TEC CORP
Publication Date
2014-02-12
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a reproducing method of molding sand which can completely remove micro mist attached on the sand surface. The molding sand is recovered from sand mould shakeout used for molding, wherein the reproducing method of molding sand includes the processes as follows: a roasting process for roasting molding sand and burning organic matters attached on the molding sand (step S5); a first polishing process that for shaving a film including magnetic red iron ore which has been formed on the surface of molding sand by carrying out the roasting process (step S7); and a second polishing process which shaves off within a housing (51) the surface of the molding sand of the film with a grinding capability lower than the grinding capability in this first polishing process (step S8). The second polishing process discharges the surface fines adhering to the surface of molding sand on which the film was shaved off by said first polishing process, and discharges these fines out of the housing with a wind force.
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Description

technical field

[0001] The present invention relates to a method for regenerating foundry sand that is shaken out from a sand mold used for casting and recovered. Background technique

[0002] In the sand mold, after the foundry sand used in the main mold and sand core is used for casting, it is also processed by a predetermined regeneration method for the purpose of reducing waste and protecting resources such as silica sand, and is used repeatedly. Sand material.

[0003] Various methods such as wet regeneration, dry regeneration, roasting regeneration, and a combination of roasting and dry regeneration have been proposed and implemented as methods for recycling foundry sand.

[0004] Among the regeneration methods described above, the applicants of the present application have proposed a method for recycling foundry sand that combines a roasting regeneration method and a dry regeneration method (see Patent Document 1). In the method for regenerating foundry sand describ...

Claims

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