The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 1999
Filed:
Oct. 23, 1997
Applicant:
Inventors:
Assignee:
Sintokogio, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22C / ;
U.S. Cl.
CPC ...
164-71 ; 164 15 ; 1641601 ;
Abstract
An apparatus to produce a shell-like mold by vacuum sucking molding sand into a shell-like cavity defined by a cope and a drag is disclosed. The apparatus includes a drag and a cope mounted on the drag so that they define a shell-like cavity between them. The drag holds on its upper surface a pattern. The drag has a plurality of sucking apertures at places adjacent to the perimeter of the pattern. The sucking apertures communicate with a vacuum source. The cope has a single molding-sand-supplying bore which communicates with the cavity. To produce a shell-like mold, the molding sand is introduced from the bore into the cavity by means of a vacuum source.