JP2005305502A5 - - Google Patents

Claims (6)

The upper and lower casting frames each having a sand blowing port on the side wall, the match plate disposed between the upper and lower casting frames, and the respective openings of the upper and lower casting frames without the match plate The sand blowing port of the upper and lower casting frames is formed by a sand blowing mechanism having sand floating movement means in upper and lower molding spaces defined by upper and lower squeezing means having a plurality of possible squeeze feet. A method of blowing and filling foundry sand,
Bringing the upper and lower molding spaces into a vertical state so that the sand blowing port is upward, and abutting the sand blowing port with a lower end of the sand blowing mechanism;
A step of jetting first compressed air having a pressure of 0.05 to 0.18 MPa from the sand floating mobilization means of the sand blowing mechanism to float the casting sand below the sand blowing mechanism;
Supplying the second compressed air to a position above the foundry sand in the sand blowing mechanism to pressurize the foundry sand and blow it into the upper and lower molding spaces;
A method for filling foundry sand, comprising: In the casting sand filling method according to claim 1,
A casting sand filling method, characterized in that when the casting sand is blown into the upper and lower molding spaces, exhaust from the side walls of the upper and lower casting frames is controlled. In the filling method of the foundry sand according to claim 1 or 2,
The casting sand filling method, wherein the pressure of the second compressed air is 0.05 to 0.18 MPa. In the filling method of the foundry sand according to any one of claims 1 to 3,
While maintaining the pressure of the first compressed air higher than the pressure of the second compressed air and increasing the pressure of these compressed air stepwise over time, the first and second compressed air are blown into the sandblast. After the pressure of the upper position of the foundry sand in the sand blowing mechanism reaches a target value, the pressure of the first compressed air is maintained higher than the pressure of the second compressed air. A casting sand filling method, characterized by exhausting from a sand blowing mechanism. In the filling method of the foundry sand according to any one of claims 1 to 4,
The match plate has a vent hole, and the upper and lower casting frames have exhaust holes that are opened and closed by a valve mechanism.
In the initial stage of the casting sand blowing process into the upper and lower molding spaces, the vent holes are closed by closing the exhaust holes of the upper and lower casting frames and discharging the compressed air from the vent holes of the match plate by operating the valve mechanism. In the final stage of the casting sand injection process into the upper and lower molding spaces, the upper and lower molding spaces are opened by opening the exhaust holes of the upper and lower casting frames by operating the valve mechanism. The compressed air inside is discharged from the exhaust holes of the upper and lower casting frames, and the upper parts of the upper and lower molding spaces are filled with casting sand closely, and the discharge of compressed air in the upper and lower molding spaces is promoted. A casting sand filling method characterized by the above. In the casting sand filling method according to any one of claims 1 to 5,
To fill the upper and lower molding spaces with casting sand as much as possible, based on the measurement result of the height of the molded mold, corresponding to the volume of the upper and lower molding spaces,
A casting sand filling method, wherein the pressure and the supply time of the first compressed air and the second compressed air to the sand blowing mechanism are adjusted.