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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.

Inactive Publication Date: 2014-02-12
ASAHI TEC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that if the fine powder adheres to the surface of reclaimed sand, when adding phenolic urethane resin or the like to the reclaimed sand, the added binder such as phenolic urethane resin will react, and at this time Begins to harden and the usable time becomes shorter

Method used

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  • Reproducing method of molding sand
  • Reproducing method of molding sand
  • Reproducing method of molding sand

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Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0027] figure 1 It is a flowchart which shows the manufacturing process of the regeneration method of foundry sand which is embodiment of this invention.

[0028] Such as figure 1 As shown, in the method for regenerating foundry sand, the foundry sand that has been shaken out of the sand mold used for casting is recovered and stored in a hopper (step S1). The recovered foundry sand is mainly equivalent to the foundry sand in which the increased core sand is added in the original sand mold casting method using the main mold of the original sand mold. The core sand is foundry sand forming a core manufactured by a shell casting method, a cold box method, or a no-bake mold manufacturing method. Therefore, the recovered foundry sand is a mixture of the foundry sand forming the master mold of the original sand mold and the foundry sand forming the sand core produced by the...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C5/00B22C5/04B22C5/06
Inventor 坂本仁曾根孝明
Owner ASAHI TEC CORP
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