JPH06140142A - Heating device for melting - Google Patents

Abstract

PURPOSE:To provide heating device for melting excellent in safety capable of preventing the counterflow of a melt. CONSTITUTION:A heating device for melting has a passage 2 for inserting a material 1 to be dissolved from an inserting part 4 on one end and supplying it to a discharge part 8 on the other end; an induction heating coil 3 for enclosing a determined part of the passage 2; and an inverter 6 for supplying a high frequency current to a coil 3 to quickly dissolve the material 1 to be dissolved into the molten material 1a in the passage 2 by high frequency induction heating. The passage 2 is inclined in such a manner that the other end discharge part 8 is situated lower, so that a part of the molten material 1a likely to flow backward on the one-end insert part 4 by high frequency induction in the passage 2 flows on the other end discharge part 8.

Description

Detailed Description of the Invention

[0001]

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

[0002]

BACKGROUND OF THE INVENTION The present inventor has
We examined a melting and heating device that melts by high frequency induction heating by feeding it from one end of a horizontal passage surrounded by an induction heating coil.

[0003]

However, in molten metal such as aluminum, the repulsive action of the electromagnetic force generated by the high frequency induction in the passage tends to cause the coil to separately flow out to both ends in the axial direction of the coil. On the insertion side of the passage at one end, part of the molten metal flows backward and blows out, which is extremely dangerous.

Therefore, an object of the present invention is to provide a melting and heating apparatus which can prevent the backflow of molten metal and is excellent in safety.

[0005]

In order to achieve the above-mentioned object, the present invention provides a passage for inserting a substance to be melted from one end insertion portion and sending it to the other end discharge portion, and a guide surrounding a predetermined portion of the passage. A heating coil; and an inverter that supplies a high-frequency current to the coil to rapidly melt the material to be melted in the passage by high-frequency induction heating to form a molten metal, and in the passage,
Inclination of the passage so that a part of the molten metal, which tends to flow back toward the one end insertion part side by electromagnetic action due to high frequency induction, flows to the other end discharge part side, so that the other end discharge part is in a lower position Is.

[0006]

By tilting the passage so that the other end discharge portion is in a lower position, it is possible to suppress the force (caused by high frequency induction) that causes a part of the molten metal to flow back toward the one end insertion portion side. All the molten metal can be flowed to the other end discharge part side.

[0007]

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

FIG. 1 shows an example of a melting and heating apparatus according to the present invention. This melting and heating apparatus has a passage 2 through which a material to be melted 1 can be inserted and an induction heating coil 3 which surrounds a predetermined portion of the passage 2. And an inverter 6 for supplying the coil 3 with electric energy by high-frequency current.

Further, the feed mechanism 5 forcibly sends the melted substance 1 inserted from the one end insertion portion 4 of the passage 2 to the coil 3 side.
And a control means 7 for controlling the amount of electric energy supplied to the coil of the inverter 6 and the feed rate of the melted material of the feed mechanism 5.
Is equipped with.

However, the solid melted material 1 sent to the melting zone R by the feeding mechanism 5 is rapidly melted by the high frequency induction heating by the coil 3, and the molten metal 1a in liquid form is formed.
And flows down, is discharged from the other end discharge portion 8 of the passage 2, and is stored in the heat insulating container 9.

The object to be melted 1 is, for example, as shown in FIG. 2, an ingot made of a metal such as aluminum and having a predetermined length and a substantially trapezoidal cross section. The left and right side end surfaces 10, 10 of the melted material 1 are continuous surfaces.

On the other hand, as shown in FIGS. 3, 4 and 5,
The passage 2 is a tubular body 11 having a substantially trapezoidal cross section having a predetermined thickness.
And a guide rail 12 in the form of a strip, and inside the tubular body 11,
A part (tip side) of the guide rail 12 is inserted.

The cylindrical body 11 and the guide rail 12 are formed of, for example, an irregular shaped refractory material such as cement having a toughness, or a ceramic having heat resistance, wear resistance and spalling (crack resistance). A coil 3 is arranged around the cylindrical body 11 to form a melting zone R.

The guide rail 12 has a shallow groove 13 along which the material to be melted 1 slides.

Further, as shown in FIG. 3, the passage 2 is inclined at a predetermined angle θ with respect to the horizontal plane so that the other end discharging portion 8 is lower than the one end inserting portion 4, and the inside of the passage 2 is inclined. hand,
Of the repulsive force (electromagnetic force) acting on the molten metal 1a by high frequency induction, the force F that causes a part of the molten metal 1a to flow back toward the insertion portion 4 side is suppressed by the gravity applied to the molten metal 1a, so that all the molten metal 1a is The other end is designed to flow down to the discharge section 8 side.

In order to effectively exert such a backflow prevention effect, it is most desirable to set the angle θ of the passage 2 to 15 ° to 45 °.

Next, as shown in FIGS. 1, 3 and 5,
The feed mechanism 5 includes a pair of rollers 14 and 14 that come into contact with the side end faces 10 and 10 of the object to be melted 1 and a pair of rollers 14 and 14 that are driven to rotate about the axes A and A to insert the object to be melted 1 at one end And a driving machine 15 for feeding from the 4 side to the other end discharging section 8 side.

Although not shown in the drawings, a slip preventing uneven portion such as a knurling is formed on the surface of the roller 14, and one or both of the rollers 14 is pushed toward the melted object 1 in a resilient direction such as a spring. It is desirable to elastically urge the object to be melted 1 to be surely sent.

The control means 7 can control the amount of electric energy supplied to the coil of the inverter 6 so as to obtain a desired melting speed, and the driving speed of the driving machine 15 (that is, the roller) so as to obtain a desired melt-feeding speed. 14 rpm) can be controlled.

Further, the control means 7 can control the amount of electric energy supplied to the coil necessary for continuously melting a desired amount of the melted substance 1 in the melting zone R and the melted substance feeding speed. This makes it possible to control the amount of dissolved substance 1 (per unit time).

The present invention is not limited to the above-mentioned embodiments, and the design can be freely changed without departing from the gist of the present invention. For example, the cross-sectional shape of the passage 2 (cylindrical body 11) may be various shapes such as a circular shape, and the melted material 1 may be formed into various shapes such as a cylindrical shape.

Further, without providing the feeding mechanism 5 and the control means 7, the melted material 1 can be handled manually or by another mechanism such as a conveyor.
It is, of course, free to feed the gas to the melting zone R of the passage 2.

[0023]

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

In the passage 2, it is possible to reliably prevent a part of the molten metal 1a from flowing back to the one end insertion portion 4 side due to high frequency induction, and to flow all the molten metal 1a to the other end discharge portion 8 side. It will be possible. Therefore, the molten metal does not blow out toward the insertion portion 4 side, so that safety is ensured.

[Brief description of drawings]

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

FIG. 2 is a perspective view of an object to be melted.

FIG. 3 is a sectional side view of a main part of a passage.

FIG. 4 is a perspective view of a main part of a passage.

FIG. 5 is a sectional front view of the main part of the passage.

[Explanation of symbols]

 1 melted object 1a molten metal 2 passage 3 coil 4 one end insertion part 6 inverter 8 other end discharge part

Claims (1)

[Claims] 1. A passage 2 for inserting a material to be melted 1 from an insertion portion 4 at one end and sending it to a discharge portion 8 at the other end, an induction heating coil 3 surrounding a predetermined portion of the passage 2, and a high frequency wave for the coil 3. An inverter 6 for supplying a current to rapidly melt the material 1 to be melted in the passage 2 by high frequency induction heating to form a molten metal 1a;
In the passage 2, a part of the molten metal 1a, which tends to flow back toward the one end insertion part 4 side by electromagnetic action due to high frequency induction, flows to the other end discharge part 8 side so that the other end discharge A melting and heating apparatus characterized in that the passage 2 is inclined so that the portion 8 is at a lower level.