JPH07208867A - Metal dissolving apparatus - Google Patents

Abstract

PURPOSE:To provide a metal dissolving apparatus capable of automatically providing predetermined temperature molten metal successively by a predetermined amount. CONSTITUTION:There are provided work supply means 2 for supplying a work W to a dissolving crucible 1, an electromagnetic induction heater 3 for increasing the temperature of molten metal M in the dissolving crucible 1 to a predetermined one, and a heat insulating furnace 4 to which the molten metal M in the dissolving crucible 1 is supplied.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a metal melting apparatus.

[0002]

2. Description of the Related Art When reusing a work such as an ingot made of aluminum or the like, it has been necessary to melt the work.

However, conventionally, the melting method has been one in which a work is put into a melting crucible and the work is melted in this crucible.

[0004]

Therefore, conventionally, it is difficult to control the temperature of the molten metal in the melting crucible, and
It was also difficult to secure the quantitative accuracy of the molten metal. Moreover, the removal of dross was troublesome.

Therefore, it is an object of the present invention to provide a metal melting apparatus capable of obtaining a fixed amount of molten metal at a constant temperature and easily removing dross and the like.

[0006]

In order to achieve the above object, one metal melting apparatus according to the present invention comprises a work supply means for supplying a work to a melting crucible, and a melting means for melting the melting crucible. An electromagnetic induction heater for raising the temperature of the molten metal to a constant temperature, and a heat insulation furnace to which the molten metal in the melting crucible is supplied.

Another metal melting apparatus according to the present invention is
Work supply means for sequentially supplying the work to the melting crucible in a fixed cycle, an electromagnetic induction heater that melts the work in the melting crucible and raises the melt melt to a constant temperature, and a constant temperature in the melting crucible A heat-retaining furnace that is supplied with a melt at a temperature and maintains the melt at a constant temperature; and a melt-supplying means that rocks the melting crucible to sequentially supply a constant amount of melt at a constant amount to the heat-retaining furnace. Be prepared.

As the work supply means, there are a supply path for sequentially sending the work along its inclined surface by its own weight, and a loading magazine into which the works sequentially sent through the supply path are fed one by one. A clamp member for holding the work in the loading magazine and a transporter for moving the clamp member in the vertical direction and the horizontal direction are provided.

As the heat insulation furnace, a heat insulation crucible,
A heater for maintaining the melt in the heat-retaining crucible at a constant temperature.

The work is preferably an ingot of aluminum or zinc.

The molten metal supply means includes a receiving member that receives the melting crucible and a tilting cylinder that tilts the receiving member.

The heating by the heater of the heat retaining furnace may be performed by induction heating or heating line.

[0013]

The work is sequentially supplied to the melting crucible by the work supply means. In the melting crucible, the work is melted to form a molten metal, and the temperature of the molten metal rises to a certain temperature and is maintained at that temperature.

Further, the molten metal maintained at a constant temperature is sequentially supplied to the heat-retaining furnace by a fixed amount by the molten metal supply means. Then, in this heat insulation furnace, a certain amount of molten metal is maintained at a certain temperature.

Therefore, it is possible to automatically obtain a certain amount of molten metal having a certain temperature.

Further, the work is sequentially sent through the supply path by its own weight and then sent to the loading magazine. The workpiece in the loading magazine is held by the clamp member, and the workpiece held by the clamp member is melted by moving the clamp member in the vertical direction and the horizontal direction by the carrier. Supplied in a crucible.

Further, the molten metal in the melting crucible is supplied to the heat insulation furnace by tilting the receiving member receiving the melting crucible with the tilting cylinder.

[0018]

The present invention will be described in detail below with reference to the drawings illustrating the embodiments.

FIG. 1 shows a metal melting apparatus according to the present invention,
This apparatus comprises a work supply means 2 for supplying a work W to a melting crucible 1, an electromagnetic induction heater 3 for raising the melt M melted in the melting crucible 1 to a constant temperature, and the melting crucible 1 And a heat insulation furnace 4 to which the molten metal M therein is supplied.

The work W is, for example, an ingot made of aluminum or zinc, but can be supplied to the melting crucible 1 by the supply means 2 and can be melted by the melting crucible 1. If you can,
It may be an ingot or a return material made of a metal other than aluminum or zinc, or various alloys. In addition,
Return materials are various metal products that are no longer used.

As shown in FIGS. 1 and 2, the work feeding means 2 feeds the work W sequentially along the inclined surface 5 by its own weight, and the feeding path 6 sequentially feeds the work W. A loading magazine 7 into which the received works W are fed one by one,
A clamp member 8 that holds the work W in the loading magazine 7 and a transporter 9 that moves the clamp member 8 in the vertical and horizontal directions are provided.

The supply path 6 is formed by arranging a plurality of rollers 10 along a plane forming a predetermined inclination angle θ. That is, the plane forming the predetermined inclination angle θ is the above-mentioned inclined surface 5.

A single feed cylinder (not shown) is provided in the vicinity of the downstream portion of the supply path 6, and the work W is placed in the loading magazine 7 by this cylinder as shown in FIG. Sent in.

The loading magazine 7 is, as shown in FIG.
A bottom wall 13 that connects the rear wall 11, the front wall 12, and the front and rear walls 12, 11.
And the front wall 12 is shorter than the rear wall 11. In addition,
The work W is fed from the back side of the paper surface of FIG.

The loading magazine 7 is provided with a standing cylinder 14 for standing up the loading magazine 7 as shown in FIG. 2B.

That is, the standing cylinder 14 has a body portion 14
The lower end of a is pivotally supported by a fixing member (not shown) via a shaft 15, and the tip of a piston rod 14b thereof is pivotally supported by a rear wall 11 of the loading magazine 7 via a shaft 16.

Therefore, as shown in FIG. 2A, when the piston rod 14b is retracted, the loading magazine 7 is held horizontally, and the piston rod 14b is indicated by the arrow in FIG. If it extends as indicated by A, the loading magazine 7 swings around the hinge portion 17 as shown by arrow B to be in an upright state.

On the contrary, from the state of FIG. 2B to FIG.
If the piston rod 14b is retracted as indicated by the arrow C in (a) of FIG.
It rocks and becomes horizontal.

Then, as shown in FIG. 2B, when the loading magazine 7 is erected and the work W in the loading magazine 7 is erected, the clamp member 8 is attached to this work W. Approach and grab.

That is, the clamp member 8 is provided with a clamp cylinder 18 and pawls 19 and 19 which are continuously provided on the piston rod 18b of the cylinder 18. The claws 19, 19 have their base end portions pivotally connected to the tip of a piston rod 18b, and the piston rod 18b reciprocates in the axial direction as indicated by arrows E, F, so that the base end portions of the claws 19, 19 are centered. Swing like G and H,
By swinging as shown by the arrow H, the work W is gripped,
The grip is released by swinging as indicated by arrow G.

The carrier 9 for moving the clamp member 8 is, for example, as shown in FIG. 1, a first screw rod 20 arranged vertically and a second screw rod horizontally arranged. twenty one
A first nut member 22 screwed to the first screw rod 20 and a second nut member 23 screwed to the second screw rod 21.
The first nut member 22 is attached to the body portion 18a of the cylinder 18 of the clamp member 8, and the second nut member 23 is attached to the first screw rod 20.
The base end of the is rotatably held.

Therefore, the motor (not shown) is driven to drive the first motor.
If the screw rod 20 rotates about its axis, the first nut member
When 22 moves up and down as shown by arrows I and J, the clamp member 8 moves up and down, and the motor (not shown) drives to rotate the second screw rod 21 around its axis, the second nut member 23 moves in the direction of arrow. K, L
As described above, the clamp member 8 reciprocates along the horizontal direction.

In FIG. 1, reference numeral 24 denotes a support frame for rotatably supporting the second screw rod 21, which is held by a fixing member (not shown). Further, in this case, it is also possible to arrange a vertical guide rod along the first screw rod 20 so that the clamp member 8 can move up and down along the guide rod.

An electromagnetic induction heater 3 is attached to the melting crucible 1. This electromagnetic induction heater 3
When a new work W is introduced into the crucible 1 having a temperature sensor, this temperature sensor works to operate the inverter, and rapid heating by the induction coil starts. And
The heating is continued until the new work W is melted and the temperature of the molten metal M reaches a predetermined constant temperature.

In order to supply the molten metal M in the crucible 1 to the heat insulation furnace 4, the molten metal supply means 25 is used.

The molten metal supply means 25 comprises a receiving member 26 for receiving the melting crucible 1 and a tilting cylinder 27 for tilting the receiving member 26.

That is, the tilting cylinder 27 has a main body 27.
The lower end of a is pivotally supported by a fixing member (not shown) via a shaft 28, and the tip of its piston rod 27b is the lower surface 29 of the receiving member 26.
It is pivotally supported by a shaft 30 at one end thereof.

Therefore, as shown by the solid line, when the piston rod 27b is retracted, the receiving member 26 is held horizontally, and when the piston rod 27b extends as shown by the phantom line, the receiving member 26 is hinged. It oscillates around the portion 31 as shown by an arrow N to become an inclined shape.

On the contrary, if the piston rod 27b is retracted from the tilted state shown by the phantom line, the receiving member 26 will have the hinge portion 31.
It oscillates about the center as shown by the arrow P and becomes horizontal.

That is, the crucible 1 held by the receiving member 26 can be tilted by sequentially tilting the receiving member 26 from the state shown by the solid line, whereby the molten metal is poured from the pouring port 1a of the crucible 1. M can be poured into the heat insulation furnace 4.
When the receiving member 26 is tilted as shown by the phantom line,
In order to prevent the crucible 1 from falling from the receiving member 26, the receiving member 26
A drop prevention portion (not shown) is formed on the.

Next, the heat-retaining furnace 4 is equipped with a heat-retaining crucible 32 and a heater 33 for maintaining the temperature of the molten metal M in the heat-retaining crucible 32.

The heater 33 may be equipped with an electromagnetic induction coil, or may be equipped with a heating wire, like the electromagnetic induction heater 3 used in the melting crucible 1. . The method of using the heating wire, that is, the method of resistance heating has advantages that the heater 33 itself is simple and the cost is not high. This resistance heating method includes an immersion heater type, a reverberatory furnace type, an indirect type and the like.

Next, a method of melting the work W by using the metal melting apparatus configured as described above will be described.

As shown in FIG. 1, first, the work W is sequentially supplied to the supply path 6 and is fed to the vicinity of the loading magazine 7 by its own weight. The work W that has come near the loading magazine 7 is fed to the loading magazine 7 by a single feed cylinder (not shown).

When the work W enters the loading magazine 7, the piston rod 14b of the standing cylinder 14 extends, and the loading magazine 7 is erected. In this state, the clamp member located above the loading magazine 7 8 is lowered by the drive of the carrier 9 as shown by an arrow J, and the cylinder for clamping is
18 is driven and the work W is held by the claws 19 and 19 of the clamp member 8.
Grab.

When the work W is gripped, the first screw rod 20 is driven to rotate to raise the first nut member 22 as shown by an arrow I, and the second screw rod 21 is driven to rotate to move the second nut member 23. The clamp member 8 holding the work W is moved to the position above the melting crucible 1 by moving as indicated by arrow K. Further, the first nut member 22 is lowered as indicated by arrow J, and the work W is supplied to the melting crucible 1.

Next, the claws 19 and 19 of the clamp member 8 are opened to release the grip of the work W by the clamp member 8 and the clamp member 8 is again positioned above the loading magazine 7. Set to standby state.

After that, the works W sent to the loading magazine 7 in a fixed cycle are sequentially supplied to the melting crucible 1 one by one as described above.

Further, in the melting crucible 1, as described above,
The electromagnetic induction heater 3 melts the supplied work W and heats the melt M until it reaches a predetermined constant temperature.

When the temperature of the molten metal M rises to a constant temperature, the molten metal supply means 25 is activated to tilt the melting crucible 1 as shown by the phantom line in FIG. Molten metal M is poured.

In the heat-retaining crucible 32, the above-mentioned constant temperature is maintained by the heater 33, and the dross and the like are pumped out by the pumping tool 34.

Therefore, according to the apparatus, the molten metal M having a constant temperature is sequentially supplied to the heat-retaining furnace 4 by a constant amount, which is most suitable for a furnace such as die-cast casting which needs to be constantly pumped in a constant cycle. It can be a system configuration.

As the carrier 9 of the work supply means 2, a cylinder may be used without using the screw rod and the nut member screwed thereto.

[0054]

Since the present invention is configured as described above, it has the following effects.

A fixed amount of the molten metal M having a constant temperature can be automatically obtained in sequence, and the workability is excellent.

Since the molten metal M having a constant temperature is always held in the heat-retaining furnace 4, the system is most suitable for a furnace that needs to be constantly pumped out in a constant cycle such as die casting.

Existing equipment using gas, oil, etc. as fuel can be easily replaced.

The temperature of the molten metal M is easy to control, and the temperature of the molten metal M is stable.

It is easy to remove dross and the like.

The accuracy of the amount of molten metal M supplied is improved.

It is the electromagnetic induction heater 3 that heats the molten metal M in the melting crucible 1, and the heater 33 of the heat retention crucible 32 also uses an electromagnetic induction coil or a heating wire. Is kept clean, and a clean molten metal M can be obtained, so that the quality can be improved.

[Brief description of drawings]

FIG. 1 is a simplified diagram showing an embodiment of the present invention.

FIG. 2 is a simplified diagram showing a loading magazine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Melting crucible 2 Work supply means 3 Electromagnetic induction heater 4 Insulating furnace 5 Inclining surface 6 Supply path 7 Loading magazine 8 Clamping member 9 Conveyor 25 Molten metal supplying means 26 Receiving member 27 Tilt cylinder 32 Insulating crucible 33 Heating machine M molten metal W work

Claims (8)

[Claims] 1. A work supply means 2 for supplying a work W to a melting crucible 1, an electromagnetic induction heater 3 for raising the melt M melted in the melting crucible 1 to a constant temperature, and the melting crucible. A heat-retaining furnace 4 to which the molten metal M in 1 is supplied. 2. Work supply means 2 for sequentially supplying the work W to the melting crucible 1 in a fixed cycle, and an electromagnetic device for melting the work W in the melting crucible 1 and raising the melt M melt to a constant temperature. An induction heater 3, a heat-retaining furnace 4 for supplying the melt M having a constant temperature in the melting crucible 1 to maintain the melt M at the constant temperature, and a melt having a constant temperature by rocking the melting crucible 1 A molten metal supply means 25 for sequentially supplying a fixed amount of M to the heat insulation furnace 4 and a metal melting apparatus. 3. A work supply means (2) for sequentially supplying a work (W) by its own weight along an inclined surface (5) and a supply path (6).
And the work W in the loading magazine 7 into which the works W sequentially sent in are fed one by one.
The metal melting apparatus according to claim 1 or 2, further comprising: a clamp member 8 for holding the clamp member 8; and a carrier 9 for moving the clamp member 8 in a vertical direction and a horizontal direction. 4. A heat-retaining furnace 4 comprises a heat-retaining crucible 32 and a heater 33 for maintaining the melt M in the heat-retaining crucible 32 at a constant temperature.
The metal melting apparatus according to claim 1 or 2, further comprising: 5. The metal melting apparatus according to claim 1, wherein the work W is an ingot of aluminum or zinc. 6. The metal melting apparatus according to claim 2, wherein the molten metal supply means 25 comprises a receiving member 26 for receiving the melting crucible 1 and a tilting cylinder 27 for tilting the receiving member 26. 7. The metal melting apparatus according to claim 4, wherein the heater 33 includes an electromagnetic induction coil. 8. The metal melting apparatus according to claim 4, wherein the heater 33 is provided with a heating wire.