JP2016107295A - Melting and supplying system of metal coarse material, and melting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a melting and supplying system of metal coarse material, in which waste of energy is reduced and which supplies molten metal by a necessary amount when the molten metal is needed, and a melting device.SOLUTION: A melting and supplying system 1 of metal coarse material includes: a coarse material carrying-in conveyer 12 which supplies a metallic coarse material 13 into a ladle 4; a melting device 27 in which the coarse materials 13, 13.. in the ladle 4 are irradiated with plasma and the coarse materials 13, 13.. are melted; and an articulated robot 50 which can hold the ladle 4. Therein, the ladle 4 is conveyed between the coarse material carrying-in conveyer 12 and the melting device 27 by the articulated robot 50 and the coarse materials 13, 13.. melted by the melting device 27 can be poured to a die cast machine side in a subsequent stage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a melting and supplying system and a melting apparatus for a metal rough material that melts a metal rough material such as aluminum and supplies it to the subsequent die casting machine.

  Conventionally, for melting a metal such as aluminum and supplying it to the subsequent die casting machine side, there are a melting chamber for melting a metal material with a melting burner, a holding chamber for keeping molten metal flowing from the melting chamber, and a molten metal. There is known a melting and holding furnace control device configured by a pumping chamber for pumping to a casting machine and controlling the output of a melting burner based on a molten metal level signal from a molten metal level detector (Patent Document 1).

JP 2005-76972 A

  However, in such a melting and holding furnace control device, in order to melt and supply a necessary amount when necessary, the temperature of the molten metal is adjusted even when the molten aluminum is not necessary during work hours or on holidays. It had to be kept constant, wasted energy and was not economical. Further, it has been difficult to always supply a constant amount of molten metal.

  Therefore, an object of the present invention is to solve the problems of the conventional melting and holding furnace control device, to reduce the waste of energy, and to supply and supply a required amount of molten metal when necessary, and a melting apparatus for melting metal Is to provide.

Among the present inventions, the invention described in claim 1 is a supply device for supplying a metal rough material to a ladle;
A melting apparatus for irradiating the rough material in the ladle with plasma to melt the rough material;
An articulated robot capable of gripping the ladle, and
A metal coarse material melting and supplying system in which the ladle is transported between the supply device and the melting device by the articulated robot, and the coarse material melted by the melting device can be poured into the die casting machine at the subsequent stage. Because
An electrode is installed at the bottom of the ladle.

  In addition to the invention described in claim 1, the invention described in claim 2 is provided with a probe erected upward from the lower electrode in the melting apparatus, while the lower part of the ladle is provided with a probe to the melting apparatus. In the set state, a receiving cylinder is provided in which the probe is inserted and comes into contact with the upper bottom surface, and the tip of the probe and the upper bottom surface of the receiving cylinder are fitted with a taper.

  In addition to the invention described in claim 1 or 2, the invention described in claim 3 includes a temperature control stand that can set the ladle in which the coarse material is melted by the melting device and includes a heater. And a temperature control device capable of adjusting the temperature of the ladle to a predetermined temperature by measuring the temperature of the ladle with a non-contact temperature sensor and controlling the output of the heater. It is.

  According to a fourth aspect of the present invention, in addition to the first aspect of the present invention, the multi-joint robot transports the ladle in which the coarse material is dissolved to the supply device and supplies the first ladle. The hot water is discharged to the ladle supplied with the rough material in the supply device after being inclined at an angle, and on the die casting machine side, the molten metal is inclined to a second angle larger than the first angle. It is characterized by performing.

The invention described in claim 5 includes a support base having a lower electrode, and a ladle set on the support base,
A melting apparatus for irradiating plasma to a metal coarse material charged in the ladle to dissolve the coarse material,
Install an electrode on the bottom of the ladle,
Provided on the support base is a probe erected upward from the lower electrode, and provided on the lower part of the ladle is a receiving cylinder in which the probe is inserted in a set state on the support base and contacts the upper bottom surface. The tip of the probe and the upper bottom surface of the receiving tube are fitted with a taper.

  The invention described in claim 1 can use an electrode excellent in heat resistance, wear resistance, and electrical conductivity, and the electrode does not dissolve and does not burn in a temperature zone where the coarse material dissolves. Further, since the crude material is melted for each ladle, there is little waste of energy, and it is possible to supply the necessary amount of molten metal when necessary. Therefore, it is possible to deal with other types and small lots, and it is possible to save space.

  The invention described in claim 2 can secure a large contact area between the probe and the upper bottom surface of the receiving cylinder, and presses the contact surface with its own weight between the ladle and the rough material, so that no contact failure occurs. Since the energization is performed stably, there is no variation in melting of the coarse material.

  The invention described in claim 3 can accurately control the temperature by accurately measuring the temperature of the molten metal.

  In the invention described in claim 4, when an amount of molten metal more than expected is generated due to variations in the shape, weight, etc. of the rough material, the excess amount of molten metal is removed in advance, and pouring is accurately performed. It is possible. Furthermore, since the molten metal remains in the ladle before melting, the surface of the electrode is protected by the molten metal, and the gap between the coarse materials is filled, so that energization can be easily performed when the plasma is irradiated.

  The invention described in claim 5 can use an electrode having excellent heat resistance, wear resistance, and electrical conductivity, and the electrode does not dissolve and does not burn in a temperature range where the coarse material dissolves. In addition, a large contact area between the probe and the upper bottom surface of the receiving cylinder can be secured, and the contact surface is pressed by the weight of the ladle and the rough material, so that contact failure does not occur and the energization is performed stably. Therefore, there is no variation in melting of the rough material.

It is explanatory drawing which shows the melt | dissolution supply system of a metal coarse material. (A) shows the plane side of an index table, (b) is explanatory drawing which shows a side surface side. It is sectional drawing which shows the state in which the ladle was installed in the turntable. (A) (b) is explanatory drawing which shows the holding | grip operation | movement of a ladle. It is explanatory drawing which shows a ladle tool end surface. It is explanatory drawing which shows a scraping apparatus. (A)-(d) is explanatory drawing which shows the process of adjusting the quantity of a molten metal.

  Hereinafter, an embodiment of a melting and supplying system for a metal coarse material according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory view showing a melting and supplying system for a coarse metal material. FIG. 2 is an explanatory diagram showing an index table. FIG. 3 is a cross-sectional view showing a state in which a ladle is installed on the rotary table. FIG. 4 is an explanatory view showing the gripping operation of the ladle. FIG. 5 is an explanatory view showing an end surface of the ladle tool. FIG. 6 is an explanatory view showing a scraping device. FIG. 7 is an explanatory diagram illustrating a process of adjusting the amount of molten metal.

  First, as shown in FIG. 1, a metal coarse material melting and supplying system 1 melts a metal such as aluminum and supplies it to a die casting machine as a molten metal. The coarse material carrying conveyor 12 which is a feeding device for conveying the slab and the ladle 4 are temporarily placed, and the coarse materials (ingots) 13, 13 which are transported on the coarse material carrying conveyor 12 and fall from the front end of the conveyor An index provided with a ladle temporary placing table 15 received by the ladle 4 and a melting device 27 that melts the coarse materials 13, 13... When the plasma is irradiated to the coarse materials 13, 13. A table 20, a scraping device 30 for removing noro, which is an aggregate of oxide film, foreign matter, impurities, etc. from the molten metal, a temperature control station 40 for adjusting the temperature of the molten metal in the ladle 4 to a predetermined temperature, The articulated robot 50 for transporting the ladle 4 in 置間, and a Chuyutoi 60 the molten metal is contacted poured has been die casting machine.

Among these, as shown in FIGS. 2A and 2B, the index table 20 is composed of the ladle 4a on which the coarse materials 13, 13,... Before being melted and the coarse materials 13, 13,. After that, the rotary table 21 for exchanging with the ladle 4b containing the molten metal and a melting device 27 having a plasma torch 28 for generating plasma are formed.
As shown in FIG. 3, the rotary table 21 has a tip 22 formed with an acute taper, and a probe 22 that comes into contact with a contact 11 of the ladle 4 described later is erected upward from the lower electrode 25. Yes. A support base having an insulating plate 24 is disposed at the periphery of the tip of the probe 22, and the outer periphery of the ladle 4 is protected above, and a hole is formed in the center of the bottom plate so that the receiving tube 10 can be inserted. A frame body 23 is provided.

The ladle 4 is formed of a metal material that does not melt or deteriorate even when aluminum having a melting temperature of 650 to 700 ° C. is melted in a container, and the surface is coated with a heat insulating material. A handle 6 having a handle shape is provided on a part of the periphery of the ladle 4. The handle 6 is preferably provided with a heat radiating fin having a heat radiating function, and even if heat is transferred from the molten metal in the ladle 4, it is desirable to prevent the handle 6 from being thermally deformed by radiating the heat. 5 is a pouring gate for discharging the molten metal.
In addition, the bottom is provided with a recess 7 that can engage with a disc-shaped electrode 8 made of carbon and having a protrusion formed on the back surface, and the electrode 8 protrudes from the bottom surface of the ladle 4 in the attached state. Yes. Also, a cradle 9 is provided on the bottom surface of the ladle 4, and below it is a carbon-made cylindrical receiving cylinder 10 into which a tapered tapered probe 22 fixed to the rotary table 21 side can be inserted. Is provided. Between the upper bottom surface of the receiving cylinder 10 and the receiving base 9, a carbon contact 11 having a downward opening taper shape that matches the shape of the tip of the probe 22 is disposed.

In addition, as shown in FIG. 4A and FIG. 5, a ladle tool 55 having a protrusion to be inserted into the handle portion of the ladle 4 is provided at the tip of the articulated robot 50. More specifically, holes 56 (not shown) provided in the handle 6 are provided with protrusions 56 at the tip of the ladle tool 55 and positioning pins 57, 57,... For positioning the ladle 4 at four corners and preventing rotation. 4 are connected as shown in FIG. 4B, and become integral with the ladle tool 55 of the articulated robot 50.
Also, the ladle tool 55 is provided with a heat radiating fin having a heat radiating function, and even if the heat of the molten metal in the ladle 4 is transferred during connection, the heat is radiated to prevent thermal deformation of the ladle tool 55, It is desirable that the articulated robot 50 is not affected by heat.

  Next, as shown in FIG. 6, the scraper 30 includes a column main body 31 and an arm portion 32 provided on the head of the column main body 31. At the tip of the arm portion 32, there are provided rakes 35 and 35 that scrape the float floating on the surface of the molten metal in the ladle 4 and an opening and closing cylinder 34 that opens and closes the rakes 35 and 35 to the left and right. At the end, there are provided a lifting cylinder 33 for moving a scraper 36, which will be described later, up and down, and a scraper 36 disposed between the rakes 35, 35 for dropping the scraps collected by the rakes 35, 35. .

The metal coarse materials 13, 13,..., Such as aluminum, and the molten metal are supplied as follows by the metal coarse material melting and supplying system 1 configured as described above.
First, as shown in FIG. 1, the coarse materials 13, 13... Arranged on the conveyer of the coarse material carry-in conveyor 12 are transported in the direction indicated by the arrows and placed on the ladle temporary placing table 15. It is dropped in the empty ladle 4 one after another. At this time, if, for example, a molten metal having a total weight of 500 g is necessary, the corresponding number of raw materials 13, 13,.

When the coarse materials 13, 13,... Are dropped into the ladle 4, the articulated robot 50 turns to the position of the temporary ladle stand 15, and the ladle tool 55 at the tip of the articulated robot 50 is moved to the handle 6 of the ladle 4. Connected to.
Next, as shown in FIGS. 2 (a) and 2 (b), the ladle 4 is placed in the frame body 23 of the rotary table 21, and after the probe 22 is inserted into the receiving cylinder 10, the projection 56 at the tip of the ladle tool 55. And the positioning pins 57, 57... Are pulled out from the respective holes provided in the handle 6, whereby the ladle 4 is set in the rotary table 21. At this time, as shown in FIG. 3 which is an AA cross section of FIG. 2B, the distal end of the probe 22 is inserted to a position where it comes into contact with the contact 11 provided in the receiving tube 10. The tapered surfaces are pressed and contacted by the weights of the rough materials 13, 13,.

Thereafter, as shown in FIG. 2A, the rotary table 21 rotates in the direction indicated by the arrow, and after the ladle 4a and the ladle 4b are exchanged, as shown in FIG. The torch 28 descends in the direction indicated by the arrow. Then, a DC power source is applied between the plasma torch 28 and the lower electrode 25 by a power supply device (not shown) in a state close to the coarse materials 13, 13... To generate plasma between the plasma torch 28 and the electrode 8. As a result, the coarse materials 13, 13... Are dissolved. The temperature in the ladle 4 at this time is 650 to 700 ° C. at which aluminum melts, but conditions such as output and time are appropriately changed according to the melting state of the coarse material 13.
Then, after the plasma irradiation by the melting device 27 is finished and the plasma torch 28 is raised in the direction opposite to the direction indicated by the arrow, the rotary table 21 rotates in the direction indicated by the arrow, so that the ladle 4b and the ladle 4a Is replaced.

Next, when the articulated robot 50 turns to the position of the index table 20 and the ladle tool 55 is connected to the handle 6 of the ladle 4, it is lifted from the rotary table 21.
Thereafter, as shown in FIG. 1, when the articulated robot 50 turns to the position of the temperature control station 40 and places the ladle 4 in the temperature control base 41, the temperature control station 40 rotates in the direction indicated by the arrow, The temperature of the molten metal in the ladle 4 is adjusted at the position of the temperature control base 42. In this temperature adjustment, the outer surface of the ladle 4 is measured by a non-contact type radiation thermometer (temperature sensor), and the output of the electric heater in the apparatus is adjusted so as to be a predetermined temperature.

  After the temperature of the molten metal in the ladle 4 is adjusted by the temperature control base 42 in this way, the temperature control station 40 rotates in the direction opposite to the direction indicated by the arrow, and the ladle 4 is positioned at the original temperature control base 41. Then, the ladle tool 55 is connected to the handle 6, and the articulated robot 50 lifts the ladle 4 from the temperature control base 41 and moves to the position of the scraper 30.

Next, in the scraping device 30 shown in FIG. 6, after the articulated robot 50 raises the rakes 35, 35 to a state where the rake 35 is immersed in the molten metal in the ladle 4, the open / close cylinder 34 contracts to open left and right. The rakes 35, 35 move to the center from the state where they are gathered, and scrapes floating on the molten metal surface are collected in the center. Thereafter, when the multi-joint robot 50 lowers the ladle 4, only the noro remains between the rakes 35 and 35, and the nodule is removed from the molten metal in the ladle 4.
Thereafter, in the scraping device 30, the lifting cylinder 33 provided on the column main body 31 extends downward, so that the scraping 36 is lowered in the direction indicated by the arrow, and the remaining scrap between the rakes 35, 35. Falls into a slot receiver 37 installed below.

Next, the articulated robot 50 moves the ladle 4 onto the temporary ladle stand 15. At this time, another ladle 4 is already set on the temporary ladle stand 15, and the coarse materials 13, 13,... Are accumulated in the other ladle 4.
Then, when the articulated robot 50 tilts the ladle 4 from a horizontal state shown in FIG. 7A to a first angle shown in FIG. A part of the molten metal 14 is discharged from the pouring port 5, and the molten metal is poured into another ladle 4 set on the temporary rack stand 15.
As a result, when a larger amount of molten metal 14 is generated due to variations in the shape and weight of the rough material 13 dropped into the ladle 4, it is possible to remove an excessive amount of molten metal 14 in advance. Become. Further, in the ladle 4 of the temporary ladle stand 15, the surface of the electrode 8 is protected by the molten metal 14, and the gap between the rough materials 13, 13. Is also possible.
Next, after the articulated robot 50 turns to the pouring pot 60, as shown in FIG. 7 (c), the ladle 4 is tilted to a second angle inclined from the first angle, unlike the previous one. Then, the molten metal 14 in the ladle 4 is poured into a groove formed in the recess of the pouring gutter 60. Thereby, the molten metal 14 in the ladle 4 is poured accurately with a predetermined amount.

Thereafter, as shown in FIG. 7 (d), the articulated robot 50 returns the ladle 4 from the inclined state to the original horizontal state. Then, the ladle 4 is pivoted to the position of the temporary ladle stand 15, and the ladle 4 is temporarily placed by pulling out the projection 56 at the tip of the ladle tool 55 and the positioning pins 57, 57,... From the respective holes provided in the handle 6. Set in the table 15.
Thereafter, similarly to the above, after the coarse materials 13, 13,... Are newly dropped by the coarse material carrying conveyor 12, they are melted by the melting device 27, removed by the scraping device 30, and then poured into the pouring bath 60. Supply molten metal to

  The metal coarse material melting and supplying system 1 configured as described above can use an electrode having excellent heat resistance, wear resistance, and electrical conductivity by installing the carbon electrode 8 at the bottom of the ladle 4. In the temperature zone where the material 13 melts, the electrode 8 does not melt and does not burn. Moreover, since the rough material 13 is melt | dissolved for every ladle 4, there is little waste of energy and it is possible to supply only the required quantity when the molten metal 14 is required. Therefore, it is possible to deal with other types and small lots, and it is possible to save space.

  The melting device 27 is provided with a probe 22 erected upward from the lower electrode 25, while the probe 22 is inserted into the lower portion of the ladle 4 in a set state with respect to the melting device 27 and contacts the contact 11. By providing the tube 10 and fitting the tip of the probe 22 and the contactor 11 serving as the upper bottom surface of the receiving tube 10 with a taper, it is possible to secure a large contact area between the probe 22 and the contactor 11, Since the contact surface is pressed by the own weight of the ladle 4 and the coarse materials 13, 13,..., There is no contact failure, and the energization is performed stably so that the coarse materials 13, 13,. Does not occur.

  Further, the ladle 4 in which the coarse materials 13, 13... Are melted by the melting device 27 can be set, and the temperature control bases 41 and 42 having heaters are provided, and the temperature of the ladle 4 is a non-contact type temperature sensor. By controlling the output of the heater by measuring the temperature, the temperature control station 40 capable of adjusting the temperature of the ladle 4 to a predetermined temperature is provided, so that the temperature of the molten metal 14 can be accurately measured and controlled. It is.

  In addition, the multi-joint robot 50 conveys the ladle 4 in which the coarse materials 13, 13... Are melted to the coarse material carry-in conveyor 12 and inclines to the first angle. After the hot water is discharged from the ladle 4 supplied with, 13,..., The shape of the coarse material 13 is obtained by pouring the hot water at an angle inclined to a second angle larger than the first angle on the die casting machine side. When an amount of molten metal 14 more than planned is generated due to variations in weight and weight, it is possible to remove the excess amount of molten metal 14 in advance and perform pouring accurately. Furthermore, the molten metal 14 remains in the ladle 4 before melting, so that the surface of the electrode 8 is protected by the molten metal 14, and the gap between the coarse materials 13, 13,. It can also be easily performed.

  Further, a carbon electrode 8 is installed at the bottom of the ladle 4, and a probe 22 is provided on the support base so as to stand upward from the lower electrode 25. On the other hand, the probe is set on the support base at the bottom of the ladle 4. By providing the receiving tube 10 that is inserted into the upper bottom surface and inserting the tip of the probe 22 and the contact 11 that is the upper bottom surface of the receiving tube 10 into a taper, heat resistance, An electrode having excellent wear and electrical conductivity can be used, and the electrode 8 does not dissolve and does not burn in the temperature range where the coarse material 13 dissolves. Further, a large contact area between the probe 22 and the contact 11 can be secured, and the contact surface is pressed by the own weight of the ladle 4 and the coarse materials 13, 13,. As a result, there is no variation in the melting of the coarse materials 13, 13.

  In addition, the melt | dissolution supply system and melt | dissolution apparatus concerning this invention are not limited to above-described embodiment at all, It can change suitably in the range which does not deviate from the meaning of this invention.

  For example, the temperature adjustment of the molten metal 14 is performed by the temperature control bases 41 and 42, but the temperature adjustment may be further performed after the scraping of the molten metal 14 before the scraping of the molten metal 14, and can be appropriately changed. Further, if the temperature of the molten metal 14 after melting by the melting device 27 is a predetermined temperature, it is not necessary to adjust the temperature with the temperature adjustment bases 41 and 42 and can be changed as appropriate.

In addition, the rakes 35 and 35 of the scraping device 30 do not necessarily have the shape shown in FIG. 6, and may have any shape that removes the floating floating in the molten metal 14 and can be appropriately changed.
Further, the opening / closing cylinder 34 is a mechanism for moving the rakes 35, 35,... Similarly, the raising / lowering cylinder 33 is a mechanism for moving the scraping 36 up and down, but may be other as long as it can drop the slot.

Further, the electrode 8 has a structure in which when the ladle 4 is generated by generating plasma and energizes and melts the coarse materials 13, 13,..., It is not necessarily required to have a disk shape if it has a more efficient shape. And can be changed as appropriate. In addition, the installation location in the ladle 4 does not need to be a bottom portion, and can be changed as appropriate.
In addition, as shown in FIG. 3 and FIGS. 7A to 7D, the electrode 8 has a structure that protrudes from the bottom surface of the ladle 4 in the attached state. 8 may be the same height as the bottom of the ladle 4. Furthermore, as long as the material of an electrode is electroconductivity and there is little reactivity with aluminum, in addition to the thing made from carbon, the carbide of silicon carbide, the compound containing these, etc. may be sufficient.

  In addition, the positioning pins 57, 57... Provided at the four corners at the tip of the ladle tool 55 do not necessarily have to be four, and it is sufficient that the ladle 4 can be positioned without rotating around the projection 56. If the projection 56 and the positioning pins 57, 57... Are inserted into the handle 6 provided on the ladle 4 so that the ladle 4 can be gripped at an accurate position, the projection 56 and the positioning pins 57, 57. It can be changed.

  Moreover, the melt supply system 1 may be made to melt and supply not only aluminum but also iron and other metals, and can be changed as appropriate.

  1. Melting supply system, 4. Ladle, 5. Pouring spout, 6. Handle, 7. Recess, 8. Electrode, 9. Base, 10. Cylinder, 11. Contact 12 ··· Rough material carrying conveyor, 13 ·· Rough material, 14 ·· Molten metal, 15 ·· Raddle temporary table, 20 ·· Index table, 21 ·· Rotary table, 22 ·· Probe, 23 ·· Frame , 24 .. Insulating plate, 25 .. Lower electrode, 27 .. Melting device, 28 .. Plasma torch, 30 .. Scraping device, 31 .. Column body, 32 .. Arm part, 33. , 34 ·· Opening and closing cylinders, 35 · · Rake, 36 · · Scraping, 37 · · Noro receiving, 40 · · Temperature control station, 41 · · Temperature control stand, 42 · · Temperature control stand, 50 · · · Many Articulated robot, 55 ... Ladle tool, 56 ... Projection, 57 ... Positioning pin, 0 ... Chuyutoi.

Claims (5)

A supply device for supplying a rough metal material to the ladle;
A melting apparatus for irradiating the rough material in the ladle with plasma to melt the rough material;
An articulated robot capable of gripping the ladle, and
A metal coarse material melting and supplying system in which the ladle is transported between the supply device and the melting device by the articulated robot, and the coarse material melted by the melting device can be poured into the die casting machine at the subsequent stage. Because
An apparatus for melting and supplying a metal coarse material, wherein an electrode is installed at the bottom of the ladle.   In the melting apparatus, while providing a probe erected upward from the lower electrode, on the lower part of the ladle, a receiving cylinder is provided in contact with the upper bottom surface by inserting the probe in a set state to the melting apparatus, The melting and supplying system for a coarse metal material according to claim 1, wherein the tip of the probe and the upper bottom surface of the receiving tube are fitted to each other with a taper.   The ladle in which the coarse material is melted by the melting device can be set, and has a temperature control stand equipped with a heater, and the temperature of the ladle is measured by a non-contact temperature sensor to output the heater. 3. The melting and supplying system for a coarse metal material according to claim 1, further comprising a temperature control device capable of adjusting the temperature of the ladle to a predetermined temperature by controlling.   After the articulated robot conveys the ladle in which the coarse material is dissolved to the supply device and inclines it to a first angle, the hot water is discharged from the ladle supplied with the coarse material in the supply device. The molten metal melting and supplying system according to any one of claims 1 to 3, wherein on the die casting machine side, the molten metal is poured while being inclined to a second angle larger than the first angle. . A support base having a lower electrode, and a ladle set on the support base,
A melting apparatus for irradiating plasma to a metal coarse material charged in the ladle to dissolve the coarse material,
Install an electrode on the bottom of the ladle,
Provided on the support base is a probe erected upward from the lower electrode, and provided on the lower part of the ladle is a receiving cylinder in which the probe is inserted in a set state on the support base and contacts the upper bottom surface. The melting device is characterized in that the tip of the probe and the upper bottom surface of the receiving tube are fitted to each other.

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