US 4,044,818 AGranted

Apparatus for forming sand molds

OwnerSam Larkininventor

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Abstract

Automatic sand mold fabricating apparatus and a method for using the apparatus is disclosed. The present invention provides at least a first cope and a first drag. Preferably, first and second copes and first and second drags are used. Where two pairs of copes and drags are utilized, the first pair will be filled at two diametrically opposed stations while the other pair will be positioned at one of two ejection stations that are both 90.degree. spaced apart from the first and second stations. The pairs of copes and drags alternate between the filling stations that are diametrically opposed to each other and the ejection stations which are 90.degree. away. A mechanism is also provided for selectively inserting a core at either one or both of the ejection stations, and a mechanism for selectively inverting the impression forming member to thereby permit two concurrently operating discharge conveyors for the finished sand molds and to also permit differently shaped molds to be formed without interrupting the sand casting mold fabrication procedure. A feature of the present invention is that each of the drags is inverted during its travel from its loading or filling station to either of the two ejected stations.

Claims31

Dependent claims

Automatic sand mold fabricating apparatus comprising:

a. a first drag and a first cope;
b. first and second filling means defining first and second stations, respectively, for depositing a quantity of sand in said first drag and in said first cope;
c. first and second support means for positioning said first drag and said first cope in opposition to said first and said second filling means, respectively;
d. first and second impression forming means coopertively associated with said first drag and with said first cope at said first and said second stations, respectively;
e. first and second actuating means for reciprocatingly moving said first and second impression forming means, respectively, wherein complimentary recesses are formed in the sand in said first drag and in said first cope with said recesses facing in the same direction;
f. displacing means for reciprocatingly moving said first drag and said first cope to and from a common, third station whereby said first cope is superimposed over said first drag;
g. first rotating means for reciprocatingly inverting said first drag before said first drag reaches said third station and before said first drag returns to said first station whereby said recesses in said first cope and said first drag are in opposition to each other;
and
h. first ejection means for discharging the sand from said first cope and said first drag in the form of a mold at said third station.

6 more elements

Dependencies are inferred from the claim text.