JP2008030066A - Mold gate cleaning device - Google Patents

Abstract

There is provided a mold cleaning device for forming a gate at an arbitrary position of a mold on a raw sand in a horizontal state with a parting surface facing upward, and capable of blowing air to the formed gate.
A pouring molding drill 2 that is disposed below a horizontal raw sand mold 1 with a parting surface facing upward and is movable in the horizontal and vertical directions to cut and form the pouring gate on the fresh sand mold 1 and a pouring drill. A lifting mechanism 3 that moves 2 in the vertical direction, a moving mechanism 4 that moves the lifting mechanism 3 and the pouring gate forming drill 2 in the horizontal direction, and mounted on the moving mechanism 4, and moves following the pouring gate forming drill 2 and a pouring gate. And an air blow unit 6 provided with an air blow nozzle 5 for air blowing from substantially right above the gate forming drill 2 to the gate formed by the forming drill 2.
[Selection] Figure 1

Description

The present invention relates to a molding and cleaning device for a gate, in which a gate is formed in a green mold on a horizontal sand with a parting surface facing upward, and air is blown to the formed gate.

Conventionally, as one of the methods for forming the pouring gate of the green sand mold, in the pouring moat method of forming a long hole pouring gate on the green sand mold, the rotary sand drill is positioned after the pouring molding surface is directed downward. Some are formed by reciprocating in the longitudinal direction of the long hole gate.
JP 2000-140998 A

However, in the conventional method for forming a pouring gate of a green sand mold configured as described above, sand particles generated by cutting the green sand mold with a rotary drill adhere to the cavity surface of the green sand mold and cause sand biting. Therefore, air is blown against the gate during cutting of the green sand mold to blow off the sand particles.

By the way, as recently, in facilities for producing a large variety of small castings, it is necessary to adopt a casting method peculiar to each model, and it is necessary to provide the gate in an optimum position corresponding to the casting method. The number and location of each will vary from model to model.
For this reason, in the conventional apparatus that performs the gate forming method, the rotary drill is configured to be able to move in the horizontal direction. Therefore, there has been a problem that sand particles generated during cutting of the gate cannot be blown off properly.

The present invention has been made in view of the above circumstances, and its purpose is to form a gate in an arbitrary position of a horizontal sand mold with a parting surface up, and to accurately match the formed gate. It is an object of the present invention to provide a molding cleaning device for a sprue that can be air blown to any position.

In order to achieve the above object, the molding cleaning device for the gate according to the present invention is a device that molds the gate on a horizontal sand mold with the parting surface up and blows air against the molded gate. A pouring molding drill that is arranged below the green sand mold so as to be movable in the horizontal and vertical directions and cuts the pouring gate on the green sand mold, an elevating mechanism that moves the pouring molding drill in the vertical direction, and the elevating mechanism And a moving mechanism for moving the gate forming drill in a horizontal direction, and mounted on the moving mechanism, moving following the gate forming drill and moving almost immediately above the gate forming drill with respect to the gate formed by the gate forming drill. And an air blow unit provided with an air blow nozzle for air blowing from.

  What is constituted in this way is to drive the gate mechanism appropriately to move the gate forming drill and the lifting mechanism to a required location below the mold on the green sand and to make the air blow nozzle of the air blow unit follow the gate forming drill. The mold is placed on the green sand mold so that it faces the top of the gate mold drill, and then the gate mold drill is lifted by the lifting mechanism while rotating the blade to cut and mold the gate on the mold on the green sand. Air is blown from the nozzle to blow away sand particles generated during cutting of the gate.

As is clear from the above description, the present invention is a device for forming a gate on a green sand mold on a horizontal surface with the parting surface up and blowing air to the molded gate, below the mold on the green sand. A pouring gate drill that cuts and forms the pouring gate on the green sand mold, an elevating mechanism that moves the pouring gate drill in the vertical direction, and the elevating mechanism and the pouring gate drill. A moving mechanism that moves in the horizontal direction, and an air blow nozzle that is mounted on the moving mechanism and moves following the gate forming drill and blows air from right above the gate forming drill to the gate formed by the gate forming drill. Since the air blow unit is provided, the gate can be easily formed at any position of the horizontal sand mold with the parting surface facing up. , It exhibits an excellent practical effect of such may be air blow to an appropriate probability relative to the sprue to be molded.

Hereinafter, an embodiment of a pouring molding cleaning device to which the present invention is applied will be described in detail with reference to FIGS. As shown in FIG. 1, the molding and cleaning device for the main gate is arranged so as to be movable in the horizontal and vertical directions under the horizontal sand mold 1 with the parting surface facing upward, and the gate is placed on the green sand mold 1. A gate forming drill 2 for cutting, a lifting mechanism 3 for moving the gate forming drill 2 in the vertical direction, a moving mechanism 4 for moving the lifting mechanism 3 and the gate forming drill 2 in the horizontal direction, and the moving mechanism 4 An air blow unit 6 provided with an air blow nozzle 5 that moves following the pouring gate forming drill 2 and blows air from above the pouring gate forming drill 2 with respect to the pouring gate formed by the pouring gate forming drill 2; It consists of

The green sand mold 1 is built in a cast frame 8 that is movably mounted on a roller conveyor 7 with a flange extending in the front-rear direction.
Further, in the gate forming drill 2, a hemispherical blade 9 is fitted on the rotating shaft of the holder 10 so as to be rotatable in a horizontal plane.

In the moving mechanism 4, as shown in FIG. 2, two support members 12, 12 are fixed on the base 11 at a predetermined interval in the left-right direction, and the two support members 12. A rectangular column-shaped guide bar 13 extending in the left-right direction is installed between 12 in a state rotated by 45 degrees in the vertical plane. A square cylindrical moving member 14 is slidably mounted on the guide bar 13, and the moving member 14 is provided with a piston rod of a first cylinder 15 pivoted on the support member 12 via a bracket 21. The moving member 14 is configured to reciprocate in the left-right direction via the guide bar 13 by the expansion and contraction operation of the first cylinder 15.

Further, in the moving mechanism 4, as shown in FIG. 1, a rectangular tubular fixing member 16 oriented in the left-right direction orthogonal to the moving member 14 is rotated by 45 degrees in the vertical plane on the upper surface of the moving member 14. The fixed member 16 is slidably penetrated with a rectangular columnar moving member 17 having the gate forming drill 2 and the lifting device 3 mounted at the left end. The front end of the piston rod of the second cylinder 22 pivoted on the fixing member 16 is pin-connected to the right side surface of the gate forming drill 2, and the gate forming drill 2 and the lifting device 3 are connected to the first side. The two cylinders 22 reciprocate in the left-right direction via the moving member 17 by the expansion and contraction operation.

In the air blow unit 6, as shown in FIG. 1, the air blow nozzle 5 is attached to the right end of the moving member 17 of the moving mechanism 4 via a support member 18 and a pipe 19. As shown in FIG. 3, the nozzle 5 is connected to a compressed air source (not shown) via a pipe 19 and an electromagnetic on-off valve 20.

  In this configuration, the first cylinder 15 and the second cylinder 22 of the moving mechanism 4 are appropriately expanded and contracted to move the gate forming drill 2 and the lifting / lowering device 3 to a required location below the green sand mold 1, The air blow unit 6 including the air blow nozzle 5 is made to follow the gate forming drill 2 so that the air blow nozzle 5 is opposed to the gate forming drill 2 with the green sand mold 1 interposed therebetween, and then the blade 9 of the gate forming drill 2 is rotated. Then, the gate forming drill 2 is raised by the lifting device 3 to cut and mold the gate into the mold 1 on the green sand, and further, the electromagnetic on-off valve 20 is opened and air blown from the air blow nozzle 5 while cutting and forming the gate. Blow away the sand particles generated inside.

It is a side view of one Example of this invention. It is an AA arrow line view of FIG. It is an air piping system diagram concerning an air blow unit.

Explanation of symbols

1 Mold on fresh sand 2 Mouth forming drill 3 Lifting mechanism 4 Moving mechanism 5 Air blow nozzle 6 Air blow unit

Claims (1)

A device that molds a pouring gate on a green sand mold in a horizontal state with the parting surface up, and blows air against the formed pouring gate,
A gate forming drill that is arranged movably in a horizontal and vertical direction below the green sand mold, and cuts the metal gate into the green sand mold.
A lifting mechanism for moving the gate forming drill in the vertical direction;
A moving mechanism for moving the lifting mechanism and the gate forming drill in a horizontal direction;
An air blow unit equipped with this moving mechanism and having an air blow nozzle that moves following the gate forming drill and blows air from substantially right above the gate forming drill with respect to the gate formed by the gate forming drill;
A molding and cleaning device for a sprue characterized by comprising: