Metal founding – Means to shape a forming surface – Including means for compacting particulate fluent mold...
Patent
1991-12-10
1992-09-22
Batten, Jr., J. Reed
Metal founding
Means to shape a forming surface
Including means for compacting particulate fluent mold...
164 37, B22C 1500
Patent
active
051488523
ABSTRACT:
A compressed air blowing apparatus for supplying compressed air to molding sand placed in a flask is arranged in such a manner that its compressed air reservoir tank is constituted by a surface-plate frame and a cover, the frame having a compressed-air outlet port which can be opened/closed by a sectioning device and a piston which can be vertically moved. The sectioning device is constituted by concentrically disposed large and small cylindrical members by a cover member secured to the large and small cylindrical members having air feed holes formed between the large cylindrical member and the small cylindrical member and by connecting duct for communicating the outside of the cylindrical member with the inside of the small cylindrical members. As an alternative to this, the sectioning device is composed of a cylindrical member extending vertically and having a spur-like cross-sectional shape and a cover member hermetically secured to the lower end potion of the cylindrical member and having a spur-like air feed hole communicated with an inside space of the cylindrical member. When the piston is moved upwards, compressed air in the compressed air reservoir tank is quickly discharged by a large quantity through the outlet port via the sectioning device.
REFERENCES:
patent: 4565233 (1986-01-01), Fischer et al.
patent: 4572274 (1986-02-01), Zimmermann
Batten, Jr. J. Reed
Sintokogio Ltd.
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