Flaskless molding machine

Abstract

A flaskless molding machine comprises: an upper flask; a lower flask; an upper sand tank disposed above the upper flask; an upper plate attached to a lower end of the upper sand tank, with a supply port being formed in the upper plate, and configured to enter and be retracted from the inside of the upper flask; a first lower sand tank having a first communication port; a second lower sand tank disposed below the lower flask having a second communication port capable of communicating with the first communication port; a lower plate attached to an upper end of the second lower sand tank, with a supply port being formed in the lower plate, and configured to enter and be retracted from the inside of the lower flask; a drive unit moving the second lower sand tank; and an adjustment drive unit moving the first lower sand tank.

1 : A flaskless molding machine forming a flaskless upper mold and lower mold, comprising:
 an upper flask;   a lower flask disposed below the upper flask and capable of clamping a match plate with the upper flask;   an upper sand tank disposed above the upper flask, communicating with a compressed air source, being open at a lower end thereof, and internally storing mold sand;   an upper plate attached to a lower end of the upper sand tank, with at least one supply port being formed in the upper plate, the supply port allowing the upper sand tank to communicate with an inside of the upper flask;   a first lower sand tank communicating with a compressed air source, internally storing mold sand, and having a first communication port for discharging the stored mold sand;   a second lower sand tank disposed below the lower flask, being open at an upper end thereof, having a second communication port capable of communicating with the first communication port of the first lower sand tank, and storing the mold sand supplied from the first lower sand tank and to be supplied into the lower flask;   a lower plate attached to an upper end of the second lower sand tank, with at least one supply port being formed in the lower plate, the supply port allowing the second lower sand tank to communicate with an inside of the lower flask;   a drive unit configured to move the second lower sand tank in a vertical direction, and allowing the upper plate and the lower plate to perform squeezing; and   an adjustment drive unit configured to move the first lower sand tank in the vertical direction.   
     
     
         2 : The flaskless molding machine according to  claim 1 ,
 wherein an upper molding space for molding the upper mold is formed by the upper plate, the upper flask and the match plate, and the upper molding space is filled with the mold sand stored in the upper sand tank, through the upper plate, and   a lower molding space for molding the lower mold is formed by the lower plate attached to the second lower sand tank moved by the drive unit to a predetermined height, the lower flask and the match plate, a height of the first communication port of the first lower sand tank is adjusted by the adjustment drive unit to a communication position of the second communication port of the second lower sand tank to supply the mold sand stored in the first lower sand tank to the second lower sand tank, and the lower molding space is filled with the mold sand stored in the second lower sand tank, through the lower plate, and   in a state where the upper molding space and the lower molding space are filled with the mold sand, the drive unit moves the second lower sand tank upward to perform squeezing between the upper plate and the lower plate.   
     
     
         3 : The flaskless molding machine according to  claim 2 , further comprising a lower filling frame,
 wherein the lower molding space is formed by the lower plate, the lower flask, the lower filling frame and the match plate.   
     
     
         4 : The flaskless molding machine according to  claim 1 , wherein the upper sand tank and the first lower sand tank are provided with permeation members each having a plurality of pores on an inner surface thereof, the pores allowing compressed air to flow. 
     
     
         5 : The flaskless molding machine according to  claim 1 , wherein an inner surface of the at least one supply port of the upper plate is inclined so that an opening on a lower surface of the upper plate is narrower than an opening on an upper surface of the upper plate. 
     
     
         6 : The flaskless molding machine according to  claim 1 , wherein an upper surface of the upper plate is provided with a protrusion having an inclined surface inclined toward the at least one supply port of the upper plate. 
     
     
         7 : The flaskless molding machine according to  claim 1 , further comprising a nozzle disposed on a lower surface of the upper plate, and communicating with the at least one supply port. 
     
     
         8 : The flaskless molding machine according to  claim 1 ,
 wherein the at least one supply port of the upper plate comprises a plurality of supply ports, and   a block plate blocking a supply port preliminarily selected from among the supply ports is disposed on a lower surface of the upper plate.   
     
     
         9 : The flaskless molding machine according to  claim 1 , wherein an inner surface of the at least one supply port of the lower plate is inclined so that an opening on an upper surface of the lower plate is narrower than an opening on a lower surface of the lower plate. 
     
     
         10 : The flaskless molding machine according to  claim 1 , wherein a lower surface of the lower plate is provided with a protrusion having an inclined surface inclined toward the at least one supply port of the lower plate. 
     
     
         11 : The flaskless molding machine according to  claim 1 , further comprising a nozzle disposed on an upper surface of the lower plate, and communicating with the at least one supply port. 
     
     
         12 : The flaskless molding machine according to  claim 1 ,
 wherein the at least one supply port of the lower plate comprises a plurality of supply ports, and   a block plate blocking a supply port preliminarily selected from among the supply ports is disposed on an upper surface of the lower plate.   
     
     
         13 : The flaskless molding machine according to  claim 1 , wherein the upper flask, the lower flask and the second lower sand tank are movably attached to four guides. 
     
     
         14 : The flaskless molding machine according to  claim 1 , wherein the first communication port and the second communication port communicate with each other on a communication plane along the vertical direction,
 a distal end of the first lower sand tank where the first communication port is formed is provided with a first block plate extending in the vertical direction, and   a side portion of the second lower sand tank where the second communication port is formed is provided with a second block plate extending in the vertical direction.   
     
     
         15 : The flaskless molding machine according to  claim 2 , wherein the upper sand tank and the first lower sand tank are provided with permeation members each having a plurality of pores on an inner surface thereof, the pores allowing compressed air to flow. 
     
     
         16 : The flaskless molding machine according to  claim 3 , wherein the upper sand tank and the first lower sand tank are provided with permeation members each having a plurality of pores on an inner surface thereof, the pores allowing compressed air to flow. 
     
     
         17 : The flaskless molding machine according to  claim 2 , wherein an inner surface of the at least one supply port of the upper plate is inclined so that an opening on a lower surface of the upper plate is narrower than an opening on an upper surface of the upper plate. 
     
     
         18 : The flaskless molding machine according to  claim 3 , wherein an inner surface of the at least one supply port of the upper plate is inclined so that an opening on a lower surface of the upper plate is narrower than an opening on an upper surface of the upper plate. 
     
     
         19 : The flaskless molding machine according to  claim 4 , wherein an inner surface of the at least one supply port of the upper plate is inclined so that an opening on a lower surface of the upper plate is narrower than an opening on an upper surface of the upper plate. 
     
     
         20 : The flaskless molding machine according to  claim 2 , wherein an upper surface of the upper plate is provided with a protrusion having an inclined surface inclined toward the at least one supply port of the upper plate.