Molding machine and a pattern carrier used therefor

Abstract

In a molding machine, foundry sand thrown into a molding space defined by a pattern plate and flask members is compressed in two steps. Namely, in the first step a lower subsidiary flask is stationary while in the second step the flask is movable. The pattern carrier molding machine comprises a molding base, flask-setting cylinders, a lift-support frame, and a segment-squeeze sand hopper. The auxiliary flask 62 of the compact pattern-plate carrier is installed movably up and down through a plurality of upward oil cylinders 63,63 that are expanded/contracted via special oil cylinders 64,65 operated by outside cylinders 68,69.

1 - 3 . (canceled)  
   
   
       4 . An apparatus for molding a mold, comprising 
 a pattern plate fixedly and horizontally disposed,    subsidiary flasks disposed around said pattern plate so as to be moved up and down,    lift means for moving said subsidiary flask up and down,    a flask member disposed above said subsidiary flask so as to be moved up and down, and    compressing means disposed above said flask members, wherein the ends of the compressing members can reach at least a point within said flask member.    
   
   
       5 . An apparatus of  claim 4 , further comprising a subsidiary flask disposed above said flask members, wherein the end of said subsidiary flask can reach at least a point within said flask member.  
   
   
       6 . A molding machine that consists of a molding base, flask-setting cylinders disposed on both sides of the base, a frame disposed to bridge and support the up-and-down movements of the flask-setting cylinders, and a hopper which is supported by the frame for pressing foundry sand through segmented squeeze feet, the molding machine comprising 
 a device for transporting and replacing a carrier on which the pattern plate is to be mounted, and    a subsidiary flask that has ventholes surrounding said segmented squeeze feet, and that is connected to flask-setting cylinders so as to be movable up and down.    
   
   
       7 . A molding machine of  claim 6 , wherein said segmented-squeeze-feet hopper is equipped with air-jetting chambers for aeration and nozzles disposed around said segmented squeeze feet for filling the hopper with sand.  
   
   
       8 . A molding machine of  claim 6 , wherein said pattern plate carrier has a frame for removing a finished mold, and wherein the frame is disposed around the periphery of said pattern plate so as to be moved up and down.  
   
   
       9 - 14 . (canceled)  
   
   
       15 . A molding machine of  claim 6 , wherein said pattern plate carrier comprises 
 a plurality of upward movable cylinders mounted on said pattern plate carrier to move said auxiliary flask,    at least two special oil cylinders mounted on said pattern plate carrier for supplying a fluid with the upward cylinders by being alternately contracted, and    at least two cylinders disposed separately outside said pattern plate carrier, and constituted such that the mutual expansion of said at least two cylinders causes said special oil cylinders to alternately contract.    
   
   
       16 - 18 . (canceled)