JP3598106B2 - melting furnace - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a melting furnace for melting a processed material (cutting powder, beverage can, crushed material, long material, etc.) of an aluminum alloy.
[0002]
[Prior art]
In a conventional melting furnace, a material charging section is provided in the furnace body so as to communicate with a state in which the molten metal circulates. It is known to dissolve by adding a solution.
[0003]
However, since the conventional melting furnace had only one moving magnetic field generator, the state of the generated spiral (for example, rotational force) was narrowly limited. Therefore, only a specific type of processing material can be sufficiently dissolved, and when another type of processing material is introduced, the processing material floats on the surface of the molten metal without being entangled with the molten metal on the spot and is oxidized or insufficiently dissolved. Yield is degraded by being sent into the furnace body as it is and floating up, and it is necessary to make a dedicated melting furnace according to the type of the processing material.
[0004]
[Problems to be solved by the invention]
The present invention has been developed in consideration of the above-described circumstances, and an object of the present invention is to make a state of a spiral that can be generated wider than before.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention , a communication path projects laterally below a furnace body , and a cylindrical material charging section is erected from the tip of the communication path, and a plurality of moving magnetic field generators are vertically arranged outside the material charging section. And the upper moving magnetic field generator is disposed above the communication path, and at least one moving magnetic field generator is provided so as to cover less than the entire circumference in the circumferential direction of the material charging section. Is provided so as to be rotatable along.
[0006]
The rotatable moving magnetic field generator is provided so as to cover less than the entire circumference of the material charging section. To change it. It should be noted that, specifically, as long as it covers at least half the circumference of the material charging section in plan view, the spiral can be efficiently generated.
[0007]
According to a second aspect of the present invention, there are provided two moving magnetic field generators, each moving magnetic field generator being provided in a semicircular shape, and a lower moving magnetic field generator being provided so as to be movable up and down. When the magnetic field generator is raised, the material input section is surrounded by a vertical moving magnetic field generator in a circular shape.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
In the first embodiment of the melting furnace of the present invention, as shown in FIGS. 1 to 4, a communication path 2 projects laterally below a furnace body 1, and a cylindrical material charging section 3 is erected from the tip of the communication path 2. In addition, two moving magnetic field generators 4, 4 which cover the outside of the material charging section 3 in a semicircular shape are provided along the upper and lower sides of the material charging section 3, and the upper moving magnetic field generator 4 is located immediately above the communication path 2. And the lower moving magnetic field generator 4 is provided so as to be able to move up and down and rotatable along the material charging section 3, and between the furnace body 1 and the material charging section 3 by the swirling of the molten metal generated in the material charging section 3. Is provided so that the molten metal can circulate through the communication path 2. The partition wall 5 provided at the center of the width of the connecting path 2 forms a circulation path of the molten metal, thereby improving the circulation efficiency of the molten metal. Symbol S is a molten metal discharge tap.
[0010]
The means for providing the lower moving magnetic field generator 4 so as to be able to ascend and descend and rotatably has a structure in which the elevating device 7 and the moving magnetic field generator 4 are sequentially mounted on the rotating device 6. Since the upper and lower moving magnetic field generators 4 and 4 are formed in a semicircular shape, if the lower moving magnetic field generator 4 is raised, the upper and lower moving magnetic field generators 4 and 4 are used to form the material input section 3. May be surrounded in a circular shape.
[0011]
The rotating device 6 has wheels 9 attached to the bottom of a gantry 8 on which a lifting device 7 is mounted, and is rotated electrically. The elevating device 7 is configured to electrically expand and contract a panda graph using a link mechanism. Further, a control device (not shown) is connected to the rotating device 6 and the elevating device 7, and when the processing amount, material, shape, size, bulk amount, and the like of the processing material are input to the control device, the lower movement is performed. A program for outputting a signal for moving the magnetic field generator 4 to an optimal position for melting to the rotating device 6 and the elevating device 7 is preset.
[0012]
The moving magnetic field generator 4 applies a three-phase alternating current to the linear motor to generate a moving magnetic field, and the moving magnetic field acts on the molten aluminum in the material input section 3 to cause an induced current to flow, thereby causing a spiral in the molten aluminum. It generates force and stirs.
[0013]
In the above-described melting furnace, the processing material is charged by opening the lid 10 provided at the upper end of the material charging section 3. Then, the processing material is rapidly melted in the material charging section 3 by the swirling of the molten metal, and is also melted in the communication path 2 to be a molten metal, sent to the furnace body 1, and heated to a desired temperature in the furnace body 1. After being heated, it is again sent to the material charging section 3. In addition, the outer diameter of the material charging section 3 matches the width of the communication path 2.
[0014]
In the second embodiment of the melting furnace, as shown in FIG. 5, a spiral guide wall 11 protrudes along the inner peripheral surface of the material charging section 3, and the guide wall 11 improves the swirling force of the vortex of the molten metal to melt the molten metal. This is to shorten the time.
[0015]
In the third embodiment of the melting furnace, as shown in FIG. 6, the outer diameter of the material charging section 3 is formed to be larger than the width of the communication path 2, and the rotation range of the lower moving magnetic field generator 4 is increased. It is characterized by the following.
[0016]
The present invention is not limited to the above embodiment. For example, the upper moving magnetic field generator 4 may be rotatably or vertically movable. Although not shown, the lifting device 7 may use a cylinder, and the rotating device 6 may slide the moving magnetic field generating device 4 along a rail.
[0017]
【The invention's effect】
In the present invention, if the moving magnetic field generator is rotated or moved up and down to change the position at which the moving magnetic field acts on the molten metal in the material charging section, the state of the spiral of the molten metal changes, so that the state of the spiral that can be generated is wider than before, A spiral corresponding to the processing material can be generated. Therefore, even if different types of processing materials are charged, the processing materials can be sufficiently dissolved in the material charging section, and the yield is improved. Further, since the communication path is provided between the furnace body and the material charging section, the time required for the molten metal to reach the furnace body becomes longer, and the melting ability is improved. If a plurality of moving magnetic field generators are rotatable and ascending and descending, the state of the spiral that can be generated is further expanded.
[Brief description of the drawings]
FIG. 1 is a sectional view taken along line AA of FIG.
FIG. 2 is a sectional view taken along line BB of FIG.
FIG. 3 is a plan view showing a first embodiment of the melting furnace.
FIG. 4 is a front view showing a first embodiment of the melting furnace.
FIG. 5 is a longitudinal sectional view showing a second embodiment of the melting furnace.
FIG. 6 is a cross-sectional view showing a third embodiment of the melting furnace.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Furnace body 2 Communication path 3 Material input part 4 Moving magnetic field generator

Claims (2)

A communication path (2) protrudes laterally below the furnace body (1) , and a cylindrical material charging section (3) stands up from the tip of the communication path (2) and extends outside the material charging section (3). A plurality of moving magnetic field generators (4) are provided above and below, an upper moving magnetic field generator (4) is arranged above the communication path (2), and at least one moving magnetic field generator (4) is connected to the material input section. A melting furnace provided so as to cover less than the entire circumference in the circumferential direction, and rotatably provided along the circumferential direction of the material charging section (3). There are two moving magnetic field generators (4), and each moving magnetic field generator (4) is provided in a semicircular shape, and the lower moving magnetic field generator (4) is provided so as to be able to move up and down. The melting furnace according to claim 1, characterized in that when the magnetic field generator (4) is raised, the material input section (3) is surrounded by a vertically moving magnetic field generator .

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