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Title:
LAYERED CASTING MOLD MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2018/043413
Kind Code:
A1
Abstract:
Provided is a layered casting mold manufacturing method that is capable of, when performing laminate molding, suppressing or preventing oozing of a sprayed liquid during formation of a two-dimensional pattern in each sand layer, and capable of suppressing or preventing deterioration in dimensional accuracy, and deterioration and deformation of the shape of an obtained layered casting mold. A three-dimensional layered casing mold 36 is manufactured by repeating an operation of: forming a thin sand layer 20 through use of coated sand prepared by coating a refractory aggregate with a water-soluble binder; and then forming a solidified layer or a cured layer of a prescribed two-dimensional pattern 46 by spraying an aqueous medium on the sand layer and heating the sand layer. When manufacturing the three-dimensional layered casing mold 36, a hydrophobic zone 42 and a water-retentive zone 50 each having a prescribed width and forming edges the two-dimensional pattern 46 are formed by spraying a hydrophobic liquid and a water-retentive liquid along a contour line 40 of the two-dimensional pattern 46 before the two-dimensional pattern 46 is formed by spraying the aqueous medium.

Inventors:
TAKAMA, Tomohiro (26-4 Aza Shinzu, Oaza Minamiyamana, Fuso-cho, Niwa-gu, Aichi 05, 〒4800105, JP)
URA, Tetsuya (26-4 Aza Shinzu, Oaza Minamiyamana, Fuso-cho, Niwa-gu, Aichi 05, 〒4800105, JP)
Application Number:
JP2017/030765
Publication Date:
March 08, 2018
Filing Date:
August 28, 2017
Export Citation:
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Assignee:
ASAHI YUKIZAI CORPORATION (5955, Nakanose-cho 2-chome Nobeoka-sh, Miyazaki 88, 〒8828688, JP)
International Classes:
B22C9/02; B22C1/18; B22C1/20; B29C64/165; B33Y10/00
Domestic Patent References:
WO2015029935A12015-03-05
WO2007077731A12007-07-12
WO2009145069A12009-12-03
Attorney, Agent or Firm:
NAKASHIMA, Michio et al. (NAKASHIMA & NAKASHIMA, NAGOYA DIA BLDG.-1 16-22, Meieki 3-chome, Nakamura-ku, Nagoya-sh, Aichi 02, 〒4500002, JP)
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