JP7478764B2 - Lead cutting system, alloy material regeneration method, and lead cutting method - Google Patents

Description

The present invention relates to a lead cutting system, a method for regenerating alloy materials, and a method for cutting lead.

Various methods have been proposed for cutting lead. For example, Patent Documents 1 and 2 propose a lead cutting method in which the heated cutting edge of an ultrasonic cutter is applied to the lead, an alloy material made of Bi and Sn is supplied to the lead where the cutting edge is applied, the lead where the cutting edge is applied is softened as a low melting point alloy made of Bi, Pb and Sn, and the ultrasonic cutter is moved as the alloy material is supplied to cut the lead. The method proposed in Patent Document 1 is said to be able to cut lead easily and reliably without generating metal fumes.

JP 2019-136786 A JP 2019-136785 A

The main objective of the present invention is to provide a lead cutting system and a lead cutting method that can cut lead at low cost, as well as to provide a method for recycling alloy materials used to cut lead.

One embodiment of the lead cutting system is a lead cutting system used in cutting lead by cutting lead with a cutting means while supplying an alloy material, and includes a cutting means for cutting lead, a removing means for removing oxides from the alloy material used when cutting the lead with the cutting means , an oxidation suppressing means for suppressing oxidation of the alloy material from which the oxides have been removed, and a supplying means for supplying the alloy material used when cutting the lead with the cutting means , wherein the removing means is an uneven object having a surface with an uneven structure, the oxidation suppressing means is oil filled in an oil pot and has a specific gravity lighter than that of the alloy material, and the alloy material supplied by the supplying means is made of a composition containing at least Bi and Sn.

The uneven material in the above-mentioned lead cutting system may be any one of filter paper, Japanese paper, and a filter.
The alloy material in the above-described lead cutting system may be a low melting point alloy having a composition including Bi, Sn, and Pb.
A portion of the irregularities in the lead cutting system may come into contact with the oil.
The oxidation suppression means in the above-mentioned lead cutting system may have a heat retention mechanism capable of maintaining the oil filled in the oil pot at a desired temperature.
The above-mentioned lead cutting system may include a recovery means for recovering the alloy material used in cutting the lead.
The recovery means in the above-mentioned lead cutting system may be an oil pot filled with oil having a specific gravity lighter than that of the alloy material.

One embodiment of the method for regenerating alloy material is a method for regenerating alloy material , which involves cutting lead with a cutting means while supplying alloy material, and involves regenerating alloy material used when cutting lead with a cutting means , the alloy material used when cutting lead with the cutting means comprising a composition containing at least Bi and Sn, and including a removal step of contacting the alloy material used when cutting lead with the cutting means, in a molten state, with the surface of a rough object having a rough surface structure, and removing oxides from the alloy material used for the cutting, and an introduction step of introducing the alloy material after contact with the rough object into oil filled in an oil pot and having a lighter specific gravity than the alloy material.
The above-mentioned method for regenerating an alloy material may include a recovery step of recovering the alloy material used in cutting the lead, prior to the removal step.

A lead cutting method according to one embodiment of the present invention uses the lead cutting system described above.
A lead cutting method according to one embodiment of the present invention is a lead cutting method in which lead is cut while an alloy material is being supplied, and uses the alloy material regenerated by the above-mentioned regeneration method.

The lead cutting system, alloy material regeneration method, and lead cutting method of the present invention allow lead to be cut at low cost.

FIG. 1 is a schematic diagram showing an example of a lead cutting method using an alloy material. FIG. 1 is a schematic diagram of a lead cutting system according to one embodiment. FIG. 1 is a schematic diagram of a lead cutting system according to one embodiment. FIG. 1 is a schematic diagram of a lead cutting system according to one embodiment. FIG. 1 is a schematic diagram of a lead cutting system according to one embodiment.

The lead cutting system, alloy material regeneration method, and lead cutting method of the present invention are described below. The present invention is not to be interpreted as being limited to the description of the embodiments exemplified below.

First, an example of a general lead cutting method using an alloy material will be described. FIG. 1 is a schematic diagram showing an example of a lead cutting method using an alloy material. In this example, lead 1, a cutting blade 3, and an alloy material 5 having a melting point of 139°C and made of a composition containing Bi (bismuth) and Sn (tin) are used to cut the lead. As shown in FIG. 1, the lead is cut by applying the cutting blade 3 to the lead 1 and supplying the alloy material 5 to the part where the cutting blade 3 is applied, in other words, the part of the lead 1 to be cut (see the symbol (S) in FIG. 1). In this example, the lead 1 is heated to 139°C or higher by an electric heater or the like, and the alloy material 5 is heated by a heat gun.

By heating the lead as described above and supplying the molten alloy material to the cut portion, the cut portion of the lead 1 (see symbol (S) in Figure 1) becomes a low-melting point alloy composed of a composition containing Bi, Sn, and Pb (lead) and melts. Therefore, by moving the cutting blade in the desired direction, the molten low-melting point alloy (containing Pb, Bi, Sn) is scraped out by the cutting blade 3, and the low-melting point alloy (containing Bi, Sn) comes into contact with new Pb and melts, resulting in the lead being cut. The minimum melting point of the low-melting point alloy (containing Pb, Bi, Sn) in this example is 95°C.

The alloy material 5 used to cut the lead is discharged in a molten state to the outside through the cutting groove when cutting the lead. For example, it falls from the edge of the lead in the direction of gravity. In the above example, examples of the discharged alloy material include an alloy material made of a composition containing Bi and Sn, and an alloy material made of a composition containing Bi, Sn, and Pb in which these alloy materials are alloyed with Pb in lead. If the discharged alloy material could be reused, it would be possible to cut lead at low cost, but the surface of the molten alloy material is oxidized by contact with air, and the molten alloy material contains oxides. Such alloy materials containing oxides have a higher melting point than alloy materials that do not contain oxides, and there is an inherent problem that they are not suitable as alloy materials for cutting.

The lead cutting system, alloy material regeneration method, and lead cutting method of the present invention can solve these problems.

<<Lead Cutting System>>
The lead cutting system of one embodiment of the present invention (hereinafter referred to as the lead cutting system of one embodiment) includes a cutting means, a removing means, an oxidation suppressing means, and a supplying means. The lead cutting system of one embodiment may include other configurations. Each configuration of the lead cutting system of one embodiment will be described below. Figures 2 to 5 are schematic diagrams showing an example of the lead cutting system of one embodiment. Note that there is no limitation on the positional relationship between the removing means, the oxidation suppressing means, and the supplying means. Hereinafter, unless otherwise specified, the alloy material used for cutting lead refers to the alloy material 5A regenerated by the lead cutting system of one embodiment. In other words, it refers to the alloy material 5A in a state in which the oxide 5B has been removed and oxidation has been suppressed. The lead cutting system of one embodiment can be said to be a circulation system of the alloy material 5, which cuts the lead 1 using the alloy material 5A from which the oxide 5B has been removed, as shown in Figs. 2(C), 3(C), 4(C), and 5(B), and in a state in which the oxide 5B is removed from the alloy material 5C used for cutting the lead, as shown in Figs. 2(B), 3(B), 4(B), and 5(A), and in which the reoxidation of the alloy material 5A from which the oxide 5B has been removed is suppressed, as shown in Figs. 2(C), 3(C), 4(C), and 5(B), the alloy material 5A from which the oxide 5B has been removed (regenerated alloy material 5A) is used to cut the lead 1. In addition, when cutting the lead for the first time, the alloy material before regeneration, for example, a solid alloy material, may be used. When using a solid alloy material, the solid alloy material is melted and used for cutting the lead. The regenerated alloy material may contain a part of the oxide 5B that has not been completely removed and remains.

<Cutting Means>
There is no limitation on the cutting means, and any conventionally known means that can be used to cut the lead 1 can be appropriately selected and used. Examples of the cutting means 3 include a saber saw and various cutters. When cutting the lead, the lead 1 may be heated by a ribbon heater or electromagnetic induction heating (bolt heater).

(lead)
There is no limitation on the lead 1 to be cut. As an example, the lead 1 is a radiation shielding material used in nuclear power plants and the like.

<Supply Means>
The supplying means 4 supplies the alloy material 5A used to cut the lead 1. There is no limitation on the supplying means 4, and it is sufficient if the alloy material 5A introduced into the oxidation suppression means 8 (the alloy material 5A introduced into the oil) can be supplied to a specified supply location. As an example, the supplying location of the alloy material 5A is the cut portion of the lead 1 or the cutting means 3. The alloy material supplied by the supplying means 4 is the alloy material 5A from which the oxides 5B have been removed. In one embodiment, the supplying means 4 supplies the regenerated alloy material 5A in a molten state. In one embodiment, the supplying means 4 supplies the alloy material 5A in a molten state from which the oxides 5B have been removed and whose oxidation has been suppressed by the oxidation suppression means 8.

An example of the supply means 4 is a pipe (not shown) connected to the oxidation suppression means 8. The example of the pipe is equipped with a heat retention mechanism that can keep the alloy material passing through the pipe in a molten state. The heat retention mechanism can maintain the temperature inside the pipe at any desired temperature. An example of the supply means 4 is the outlet 4A of the oil pot 8B.

(Alloy material)
The alloy material 5A used in the lead cutting system of one embodiment is made of a composition containing at least Bi and Sn. The melting point and the amount of Bi and Sn of the alloy material 5A used in the lead cutting system of one embodiment are not limited. As an example, the alloy material 5A is an alloy material having a melting point of 150°C or less and made of a composition containing at least Bi and Sn. As an example, the alloy material 5A has a Bi content of 55% by mass to 60% by mass and a Sn content of 40% by mass to 45% by mass.

The alloy material 5A used in the lead cutting system of the embodiment may contain other elements than Bi and Sn. As an example, the alloy material 5A is made of a composition containing Pb as well as Bi and Sn. As an example, the alloy material 5A is a low melting point alloy made of a composition containing at least Bi, Sn, and Pb constituting lead 1, alloyed with Pb constituting lead 1.
As an example, the alloy material 5A is an alloy material having a melting point of 100° C. or less, the alloy material being made of a composition containing at least Bi, Sn, and Pb.

<Removal Method>
The surface of the alloy material 5A used for cutting is oxidized in the atmosphere, and the alloy material 5C containing the oxide 5B is obtained. Note that a portion of the alloy material 5A used for cutting may remain as the alloy material 5A without being oxidized. An example of the alloy material 5C containing the oxide 5B is a mixture of the alloy material 5A and the oxide 5B. An example of the alloy material 5C containing the oxide 5B is an alloy material in which a portion of the surface or the entire surface is oxidized.
The removing means 6 removes the oxide 5B from the alloy material 5C used to cut the lead 1. In this specification, the alloy material 5 used to cut the lead 1 includes the alloy material 5A supplied by the supplying means and a low melting point alloy in which the supplied alloy material is alloyed with Pb. Examples of the oxide include bismuth oxide, tin oxide, and lead oxide.

In one embodiment, the removal means 6 is an uneven object having an uneven surface structure. Examples of materials for the uneven object include paper materials, resin materials, and glass materials. Paper materials are preferable because they can be easily deformed into the desired shape, are inexpensive, and can be burned. An example of the uneven object is filter paper, Japanese paper, or a filter.

Although the detailed mechanism is not entirely clear at present, the melting point of the oxide is much higher than that of the alloy material. For example, the melting point of tin oxide is 1630°C, and the melting point of bismuth oxide is 817°C. Therefore, when the alloy material used to cut lead 1 is in a molten state, oxide 5B usually exists in a solid state. When alloy material 5C containing oxide 5B in this state is brought into contact with the surface of an uneven object, only oxide 5B in the solid state is trapped in the unevenness of the surface of the uneven object. It can be inferred that this mechanism allows oxide 5B to be removed from alloy material 5C containing oxide 5B.

In one embodiment of the lead cutting system, the alloy material 5C used to cut the lead is configured to be able to come into contact with the surface of the uneven object in a molten state. In one embodiment of the lead cutting system, the removal means 6 is disposed near (e.g., directly below) the cut portion of the lead 1, and the alloy material 5C used to cut the lead 1 is configured to be able to come into contact with the surface of the uneven object in a molten state.

The lead cutting system of one embodiment includes a transport means (not shown) that transports the alloy material used to cut the lead to the removal means 6. One example of the transport means is equipped with a heat retention mechanism that can maintain the alloy material in a molten state. The heat retention mechanism can maintain the temperature inside the transport means at any desired temperature. Examples of the transport means include piping and gutters.

As shown in FIG. 2(A), a preferred embodiment of the lead cutting system includes a recovery means 10 for recovering the alloy material 5C used in cutting the lead. In this embodiment, the alloy material 5C used in cutting the lead can be reused without waste. The recovery means 10 as an example is a container that is arranged under the cut portion of the lead 1 and can recover the cut portion of the lead and the alloy material that falls from the vicinity of the cut portion in the direction of gravity. The recovery means 10 as an example has a hole for dripping the recovered alloy material. The recovery means as an example has a pipe 15 that is connected to the container as the recovery means 10, and the recovered alloy material can be brought into contact with the uneven object through the pipe 15. The recovery means as an example has a valve that can be opened and closed. The recovery means as an example is funnel-shaped. In this embodiment, the alloy material used in cutting the lead can be brought into contact with the surface of the uneven object without waste. The recovery means 10 as an example has a heat retention mechanism that can keep the recovered alloy material in a molten state. Also, as shown in FIG. 3(A), the recovery means 10 may be in the form shown in FIG. 2(B). That is, the combination of the removal means 6 and the oxidation suppression means 8 may be used as the recovery means 10. Also, as shown in FIG. 4(A), the oxidation suppression means 8 may be used as the recovery means 10. In the embodiment shown in FIG. 3 and FIG. 4, by using the oxidation suppression means 8 as the recovery means 10, further progress of surface oxidation of the alloy material can be suppressed until the alloy material 5C used in the lead cutting is brought into contact with the removal means 6. Also, in the embodiment shown in FIG. 3, the oxide 5B can be removed multiple times by multiple removal means 6, and the oxide 5B can be removed more efficiently. The configurations of the recovery means 10 shown in each figure can be appropriately combined. The above-mentioned transport means may be used as the recovery means 10.

In one embodiment of the lead cutting system, the lead 1 and the removal means 6 are positioned apart in the planar direction, and the recovery means 10 is positioned below the lead 1. In this positioning configuration, after the alloy material 5C used to cut the lead 1 is recovered by the recovery means 10 positioned below the lead 1, the recovery means 10 can be moved to above the removal means 6. Figures 2(A), 3(A), and 4(A) are schematic diagrams showing the recovery means 10 in a changed state.

If the alloy material used to cut the lead 1 can be brought into contact with the surface of the uneven object that is the removal means 6 without using the recovery means 10, the recovery means 10 does not need to be provided. In the embodiment shown in FIG. 5, the removal means 6 is located below the lead 1 (cutting means), and the alloy material used to cut the lead 1 can be brought into contact with the removal means 6 without using the recovery means 10. In the embodiment shown in FIG. 5, the removal means 6 is in contact with the oxidation suppression means 8, and the alloy material from which the oxides have been removed is introduced into the oxidation suppression means 8. The oxidation suppression means 8 can be replaced above the lead 1. FIG. 5(A) is a schematic diagram showing the state in which the oxidation suppression means 8 has been replaced.

There is no limit to the surface roughness of the uneven object, as long as it has unevenness that can remove oxide 5B from alloy material 5C.

The removal means 6 may be held by a holding means such as a funnel (not shown). If the uneven object can stand on its own, no holding means is required. For example, in a form in which the filter paper, which is the removal means 6, is held by a funnel, the alloy material 5A from which the oxides 5B have been removed can be introduced into the oil pot 8B through the legs of the funnel. As described below, the oil pot 8B is filled with oil 8A, which has a lower specific gravity than the alloy material. In this form, the surface of the uneven object is an inclined surface that follows the shape of the funnel. In this form, the inclined surface can be used to slide the alloy material 5A from which the oxides 5B have been removed in the direction of gravity, making it easy to introduce it into the oil pot 8B. One example of an uneven object has an inclined surface.

In one embodiment, the lead cutting system includes multiple removal means 6 (see FIG. 3). In this embodiment, the multiple removal means 6 can be used in stages to more effectively remove the oxide 5B.

According to one embodiment of the lead cutting system, the alloy material 5C used in lead cutting can be regenerated by the removal means 6. In other words, the oxide 5B can be removed from the alloy material 5C. The lead cutting system of one embodiment can cut the lead 1 using the regenerated alloy material 5A, making it possible to cut lead at low cost. However, the alloy material 5A regenerated by the removal means 6 will once again undergo surface oxidation due to contact with the air.

<<Oxidation Suppression Means>>
Therefore, the lead cutting system of one embodiment includes an oxidation suppression means 8 that suppresses oxidation of the alloy material 5A from which the oxide 5B has been removed. The lead cutting system of one embodiment can suppress re-oxidation of the regenerated alloy material 5A by the oxidation suppression means 8. In the lead cutting system of one embodiment, the oxidation suppression means 8 may be fixed at a predetermined position or may be movable to an arbitrary position.

The oxidation suppression means 8 in one embodiment is oil 8A filled in an oil pot 8B. In other words, it is an oil pot 8B filled with oil 8A. The alloy material 5A from which the oxide 5B has been removed is temporarily held in the oil 8A. If a solid-state alloy material is used when cutting the lead 1 for the first time, the solid-state alloy material can also be held in the oil 8A.

The oil 8A should have a lower specific gravity than the alloy material and a higher ignition point than the melting point of the alloy material. As an example, the ignition point of the oil is 200°C or higher. The oil 8A may be determined taking into consideration the specific gravity and melting point of the alloy material 5A. Examples of the oil 8A include silicone oil, salad oil, and machine oil. Other oils may also be used.

In one embodiment of the lead cutting system, the alloy material 5A from which the oxides 5B have been removed has a greater specific gravity than the oil 8A, so the alloy material 5A sinks in the oil pot 8B filled with the oil 8A. Specifically, as shown in Figures 2(B), 3(B), 4(B), and 5(A), the alloy material is separated from the oil in the oil pot.

The oil pot 8B may be any suitable oil as long as it can be filled with oil 8A. Examples of the oil pot 8B include a tank and a kettle. One example of the oil pot 8B has a heat retention mechanism that can maintain the filled oil at any temperature. One example of the oil pot 8B has a heat retention mechanism that can maintain the filled oil 8A at a temperature higher than the melting point of the alloy material, for example, about 200°C. One example of the oil pot is a high-temperature water tank. One example of the high-temperature water tank is equipped with an electric heater and can be controlled to keep the liquid temperature of the oil 8A constant by a switch linked to a thermometer or a thermostat.

The oil pot, as an example, has an outlet 4A for removing the alloy material introduced into the oil 8A. The outlet 4A, as an example, is a hole that can be opened and closed. The supply means 4 in the lead cutting system of one embodiment is the outlet 4A of the oil pot, and the alloy material 5A removed from the outlet 4A is supplied to the cut portion of the lead 1 or the cutting means by dripping due to gravity. The oil pot, as an example, is configured to be movable so that the outlet 4A of the oil pot 8B is positioned directly above or near the cut portion of the lead 1 or the cutting means when cutting the lead 1.

The lead cutting system of one embodiment includes a conveying means (not shown) that is connected to the outlet 4A of the oil pot 8B and can supply the cut portion of the lead and the alloy material to the cutting means. Examples of the conveying means include various pipes. The supplying means of one embodiment is a pipe connected to the oxidation suppression means 8. The supplying means of one embodiment is an opening/closing valve that can open and close the outlet 4A of the oil pot 8B. In the embodiments shown in Figures 2 (B), 3 (B), 4 (B), and 5 (A), the supplying means 4 has a valve that can be opened and closed. Oil 8A may be filled in the pipe. In this embodiment, oxidation of the alloy material in the pipe can be suppressed. As an example of the conveying means, the alloy material 5A in the oil pot can be conveyed by driving a motor or the like.

As shown in Figures 2(B), 3(B), 4(B), and 5(A), the example uneven object 6 has a portion in contact with the oil 8A. In this configuration, the alloy material 5A from which the oxides 5B have been removed can be introduced without delay into the oil 8A filled in the oil pot 8B, and re-oxidation of the alloy material 5A can be effectively suppressed. The example uneven object 6 is located near the oxidation suppression means 8. The example uneven object 6 is replaceable.

＜＜Method of recycling alloy materials＞＞
The regeneration method of an alloy material according to one embodiment of the present invention (hereinafter, referred to as the regeneration method of one embodiment) is a method for regenerating an alloy material used for cutting lead, and includes a removing step and an introducing step. The regeneration method of one embodiment can be used by appropriately selecting the configuration described in the lead cutting system of one embodiment.

The alloy material regenerated by the regeneration method of one embodiment is the alloy material used to cut the lead 1. The alloy material can be appropriately selected and used from those described in the lead cutting system of one embodiment. The same applies to the lead and the cutting means.

(Recovery process)
A preferred embodiment of the regeneration method may include a recovery step. The recovery step is a step of recovering the alloy material used in cutting the lead 1 before the removal step. In one example of the recovery step, various containers are used to recover the alloy material (5A, 5C) dripping in the direction of gravity. In the recovery step, the recovery means 10 described in the lead cutting system of one embodiment can be appropriately selected and used. In one example of the recovery step, the oxidation suppression means 8 described in the lead cutting system of one embodiment is used to recover the alloy material. In one example of the oxidation suppression means 8, the oxidation suppression means 8 is disposed below the cut portion of the lead 1 in the direction of gravity, and the alloy material used in cutting the lead 1 can be recovered without delay. In addition, by using the oxidation suppression means 8, further surface oxidation of the alloy material can be suppressed.

(Removal process)
The removal step is a step of contacting the alloy material used for cutting the lead 1 in a molten state with the surface of the uneven object 6 having an uneven surface structure, and removing the oxide 5B from the alloy material 5C. An example of the molten state is a state in which the alloy material 5A is in a molten state and the oxide 5B is in a solid state. The uneven object 6 can be appropriately selected from those described in the lead cutting system of one embodiment. If the recovered alloy material is in a solid state, the solid alloy material may be heated to a molten state prior to the removal step.

In one embodiment of the regeneration method, the removal process can remove oxide 5B from alloy material 5C.

(Introduction process)
The introduction step is a step of introducing the alloy material after contact with the uneven object 6 into oil 8A filled in an oil pot 8B, which has a lighter specific gravity than the alloy material. The alloy material after contact with the uneven object 6 is alloy material 5A from which oxides 5B have been removed, and by introducing this alloy material 5A into oil 8A filled in oil pot 8B, surface oxidation of alloy material 5A can be suppressed.

The oil pot 8B and the oil 8A filled in the oil pot 8B can be appropriately selected and used from those described in the lead cutting system of one embodiment.

The temperature of the oil 8A filled in the oil pot may be equal to or higher than the melting point of the alloy material 5A from which the oxides 5B have been removed, or it may be lower than the melting point. In the former case, the alloy material can be kept in a molten state in the oil 8A. In the latter case, the alloy material solidifies, but when it is time to use the regenerated alloy material, the temperature of the oil 8A can be set to a temperature equal to or higher than the melting point of the alloy material.

<<How to cut lead>>
A lead cutting method according to one embodiment of the present invention (hereinafter, referred to as an embodiment of the lead cutting method) uses an alloy material regenerated by the regeneration method according to one embodiment.
An embodiment of the lead cutting method uses an embodiment of the lead cutting system.

One embodiment of the lead cutting method can cut lead at low cost.

1... Lead 3... Cutting means, cutting blade 4... Supply means 4A... Extraction port 5... Alloy material 5A... Alloy material from which oxides have been removed 5B... Oxide 5C... Alloy material containing oxide 6... Removal means, uneven object 8... Oxidation suppression means 8A... Oil 8B... Oil pot 10... Recovery means

Claims (11)

A lead cutting system used in cutting lead by a cutting means while supplying an alloy material, comprising:
cutting means for cutting the lead;
a removing means for removing oxides from the alloy material used when cutting the lead with the cutting means ;
an oxidation suppression means for suppressing oxidation of the alloy material from which the oxides have been removed;
a supply means for supplying an alloy material used when the lead is cut by the cutting means ,
the removing means is an uneven object having an uneven surface structure,
the oxidation suppression means is oil filled in an oil pot and having a specific gravity lower than that of the alloy material,
The alloy material supplied by the supply means is composed of a composition containing at least Bi and Sn.
Lead cutting system. The uneven object is any one of filter paper, Japanese paper, and a filter.
10. The lead cutting system of claim 1. The alloy material is a low melting point alloy having a composition containing at least Bi, Sn, and Pb;
3. A lead cutting system according to claim 1 or 2. A portion of the uneven surface is in contact with the oil.
4. A lead cutting system according to any one of claims 1 to 3. The oxidation suppression means has a heat retention mechanism capable of maintaining the temperature of the oil filled in the oil pot at a desired temperature.
5. A lead cutting system according to any one of claims 1 to 4. A recovery means for recovering the alloy material used in cutting the lead is included.
6. A lead cutting system according to any one of claims 1 to 5. The recovery means is an oil pot filled with oil having a specific gravity lighter than that of the alloy material.
7. The lead cutting system of claim 6. A method for regenerating an alloy material, which is used in cutting lead by a cutting means while supplying an alloy material, comprising the steps of:
The alloy material used when cutting lead with the cutting means is made of a composition containing at least Bi and Sn,
a removing step of contacting the alloy material used when cutting lead with a cutting means, in a molten state, with a surface of an uneven object having an uneven surface structure, and removing oxides from the alloy material used for the cutting;
and introducing the alloy material after contact with the uneven object into oil filled in an oil pot and having a specific gravity lower than that of the alloy material.
How to regenerate alloy materials. The method includes a recovery step of recovering the alloy material used in cutting the lead before the removal step.
The method for regenerating an alloy material according to claim 8. Using the lead cutting system according to any one of claims 1 to 7,
Lead cutting methods. A lead cutting method for cutting lead while supplying an alloy material, comprising the steps of:
The alloy material regenerated by the alloy material regeneration method according to claim 8 or 9 is used.
Lead cutting methods.

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