US20080236102A1

US20080236102A1 - Method of packaging seamed flux-cored welding wire intermediate product and package of seamed flux-cored welding wire intermediate product

Info

Publication number: US20080236102A1
Application number: US12/037,549
Authority: US
Inventors: Koichi Murakami; Shoji Hirose
Original assignee: Kobe Steel Ltd
Current assignee: Kobe Steel Ltd
Priority date: 2007-03-28
Filing date: 2008-02-26
Publication date: 2008-10-02
Also published as: KR20080088472A; CN101274669B; CN101274669A; JP5010952B2; KR100945115B1; JP2008239221A

Abstract

A method of packaging a seamed flux-cored welding wire intermediate product in which a flux is filled in a mild steel outer shell includes the steps of forming a stacked product by depositing or winding a seamed flux-cored welding wire intermediate product around a central member in the form of a coil using the central member as the center, packaging the stacked product in a metal package together with a desiccant, and deaerating and sealing the metal package.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a method of packaging a seamed flux-cored welding wire intermediate product and a package of a seamed flux-cored welding wire intermediate product.
2. Description of the Related Art
In order to realize and maintain a satisfactory welding performance of seamed flux-cored welding wires (hereinafter also simply referred to as “wires”) in which a flux is filled in a mild steel outer shell, it is important that the moisture content in the wires is reduced as much as possible by suppressing the absorption of moisture by the wires during and after the production of the wire products (i.e., the absorption of moisture by the flux included in the wires) in terms of quality control. If the moisture content in the wires is high, the moisture is decomposed by an arc discharge during welding, thus producing hydrogen gas when a molten metal is solidified. Accordingly, a blowhole may be formed. As a result, a desired weld strength cannot be obtained, and several years later, cracks and the like may be formed at the welded area.
In producing such wires, the final products are continuously produced from raw materials in terms of time and mechanical process. Therefore, there are few possibilities of moisture absorption during the production of the wires, and thus particular problems do not occur.
On the other hand, for example, when intermediate products are produced at a production facility, the intermediate products are then packaged to prepare packages and the packages are transported to another production facility, and final products are then produced at the other production facility by performing a process such as wire drawing, the wire intermediate products may absorb moisture in air during the transportation to the other production facility, thereby increasing the moisture content in the wires. It has also been found that this problem particularly significantly occurs when the period of maritime transportation of the intermediate products is long, the temperature change is significant, and the intermediate products pass through an area with a climate with high humidity, for example, when the intermediate products are transported by sea over the equator.
Regarding an example of a technique of packaging an intermediate product to prepare a package, Japanese Unexamined Patent Application Publication No. 6-278714 discloses a package of a welding wire and a method of packaging a welding wire. According to this technique, a welding-wire wound product that is prepared by winding a wire having a diameter in the range of 0.6 to 1.6 mm into a coil without using a former such as a reel or a spool is wrapped with an aluminum composite film such as an aluminum laminated film, the film is sealed into a bag so that at least one opening is left, and the remaining opening is sealed after deaeration. Accordingly, this technique is advantageous in that no industrial waste is generated, and breaking of the film can be suppressed in handling during transportation.
However, since the aluminum composite film used in Japanese Unexamined Patent Application Publication No. 6-278714 is a material produced by simply depositing aluminum on a resin material by vacuum evaporation, a moisture-proofing property of the film is insufficient. Accordingly, the wire may absorb moisture during maritime transportation, thus increasing the moisture content.
In addition, since the technique disclosed in Japanese Unexamined Patent Application Publication No. 6-278714 is used for a final product of a welding wire having a diameter in the range of 0.6 to 1.6 mm, a coil is formed without using a former, which corresponds to a central member of the present invention. However, when an intermediate product is transported in such a form, the shape of the coil (i.e., the shape of a stacked product in the description of the present invention) may become distorted or deformed.

SUMMARY OF THE INVENTION

The present invention has been conceived in view of the above problems. It is an object of the present invention to provide a method of packaging a seamed flux-cored welding wire intermediate product and a package of a seamed flux-cored welding wire intermediate product in which the moisture content contained in the seamed flux-cored welding wire intermediate product is not increased and the shape of a stacked product thereof does not become distorted or deformed.
According to a method of packaging a seamed flux-cored welding wire intermediate product of the present invention that has solved the above problems, a method of packaging a seamed flux-cored welding wire intermediate product in which a flux is filled in a mild steel outer shell includes a step of forming a stacked product, a step of packaging, and a step of deaerating.
More specifically, according to the method of packaging a seamed flux-cored welding wire intermediate product of the present invention, in the step of forming a stacked product, a stacked product is formed by depositing or winding a seamed flux-cored welding wire intermediate product around a central member in the form of a coil using the central member as the center; in the step of packaging, the stacked product is packaged in a metal package together with a desiccant; and in the step of deaerating, the metal package is deaerated and sealed.
That is, since a stacked product is formed by depositing or winding a seamed flux-cored welding wire intermediate product around a central member in the form of a coil using the central member as the center, the phenomenon in which the shape of the stacked product becomes distorted and deformed can be prevented during transportation. In addition, by packaging in the metal package, intrusion of moisture from the outside air can be substantially completely prevented. By deaerating the metal package, the absolute amount of moisture in the metal package can be reduced. Furthermore, by absorbing moisture remaining in the metal package using the desiccant packaged in the metal package together with the seamed flux-cored welding wire intermediate product, the absorption of moisture by the flux contained in the wire can be prevented, thus preventing an increase in the moisture content in the seamed flux-cored welding wire intermediate product.
In the method of packaging a seamed flux-cored welding wire intermediate product of the present invention, a support plate for supporting the seamed flux-cored welding wire intermediate product is preferably provided on at least one end of the central member, and in the step of forming a stacked product, the stacked product is preferably formed by depositing or winding the seamed flux-cored welding wire intermediate product around the central member in the form of a coil while the seamed flux-cored welding wire intermediate product is supported by the support plate.
In this case, the seamed flux-cored welding wire intermediate product is deposited or wound while being pressed with some amount of pressure applied toward the support plate provided on the central member. Accordingly, the resulting stacked product has a satisfactory shape, and thus, the shape of the stacked product does not easily become distorted or deformed during transportation. In addition, when the seamed flux-cored welding wire intermediate product is drawn out or wound off with a wiredrawing machine, a tangle of the seamed flux-cored welding wire intermediate product can be prevented.
In the method of packaging a seamed flux-cored welding wire intermediate product of the present invention, before the step of forming a stacked product, a lubricant for ensuring the drawability and holding oil for holding the lubricant are preferably applied on the surface of the seamed flux-cored welding wire intermediate product.
In this case, the holding oil applied on the surface of the seamed flux-cored welding wire intermediate product can prevent detachment of the lubricant from the surface of the wire due to vibration during transportation or a dry atmosphere.
In the method of packaging a seamed flux-cored welding wire intermediate product of the present invention, the seamed flux-cored welding wire intermediate product preferably has a diameter in the range of 2.0 to 5.5 mm.
According to a package of a seamed flux-cored welding wire intermediate product of the present invention, a package for packaging a seamed flux-cored welding wire intermediate product in which a flux is filled in a mild steel outer shell includes a central member disposed at the center of a coil-shaped stacked product composed of a seamed flux-cored welding wire intermediate product, a metal package which packages the central member together with the stacked product and which is deaerated, and a desiccant packaged in the metal package.
According to this package of a seamed flux-cored welding wire intermediate product, since the seamed flux-cored welding wire intermediate product can be disposed as a coil-shaped stacked product using the central member as the center, the phenomenon in which the shape of the stacked product becomes distorted and deformed can be prevented during transportation. In addition, since the seamed flux-cored welding wire intermediate product can be packaged in the metal package, intrusion of moisture from the outside air can be substantially completely prevented. Since deaeration in the metal package can be performed, the absolute amount of moisture in the metal package can be reduced. Furthermore, since the desiccant packaged in the metal package together with the seamed flux-cored welding wire intermediate product absorbs moisture remaining in the metal package, the absorption of moisture by the flux contained in the wire can be prevented, thus preventing an increase in the moisture content in the seamed flux-cored welding wire intermediate product.
In the package of a seamed flux-cored welding wire intermediate product of the present invention, a support plate for supporting the seamed flux-cored welding wire intermediate product is preferably provided on at least one end of the central member.
In this package of a seamed flux-cored welding wire intermediate product, the seamed flux-cored welding wire intermediate product is deposited or wound while being pressed with some amount of pressure applied toward the support plate provided on the central member. Accordingly, the resulting stacked product has a satisfactory shape, and thus, the shape of the stacked product does not become distorted or deformed during transportation. In addition, when the seamed flux-cored welding wire intermediate product is drawn out or wound off with a wiredrawing machine, a tangle of the seamed flux-cored welding wire intermediate product can be prevented.
In the package of a seamed flux-cored welding wire intermediate product of the present invention, a lubricant for ensuring the drawability and holding oil for holding the lubricant are preferably applied on the surface of the seamed flux-cored welding wire intermediate product.
In this package of a seamed flux-cored welding wire intermediate product, the holding oil applied on the surface of the seamed flux-cored welding wire intermediate product can prevent detachment of the lubricant from the surface of the wire due to vibration during transportation or a dry atmosphere.
In the package of a seamed flux-cored welding wire intermediate product of the present invention, the seamed flux-cored welding wire intermediate product preferably has a diameter in the range of 2.0 to 5.5 mm.
According to the method of packaging a seamed flux-cored welding wire intermediate product of the present invention, a seamed flux-cored welding wire intermediate product can be packaged so that the moisture content contained in the seamed flux-cored welding wire is not increased and the shape of the stacked product does not become distorted or deformed.
According to the package of a seamed flux-cored welding wire intermediate product of the present invention, the moisture content contained in the seamed flux-cored welding wire is not increased and the phenomenon in which the shape of the stacked product becomes distorted or deformed can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart showing a flow of a method of packaging a seamed flux-cored welding wire intermediate product according to the present invention;

FIG. 2 is a schematic view illustrating the formation of a stacked product in a step of forming a stacked product;

FIG. 3A is a view showing a packaging form of a seamed flux-cored welding wire intermediate product using a steel container;

FIG. 3B is a view showing a packaging form of a seamed flux-cored welding wire intermediate product using an aluminum barrier;

FIG. 4A is a plot showing the history of humidity inside and outside a steel container of Example 1 during a transportation test; and

FIG. 4B is a plot showing the history of temperature and humidity inside and outside an aluminum barrier of Example 2 during the transportation test.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

A method of packaging a seamed flux-cored welding wire (hereinafter also simply referred to as “wire”) intermediate product and a package of a seamed flux-cored welding wire intermediate product according to the present invention will now be described in detail with reference to FIGS. 1 to 3B. FIG. 1 is a flowchart showing a flow of the method of packaging a seamed flux-cored welding wire intermediate product according to the present invention. FIG. 2 is a schematic view illustrating the formation of a stacked product in a step of forming a stacked product. FIGS. 3A and 3B are views each showing a packaging form of a seamed flux-cored welding wire intermediate product according to the present invention. More specifically, FIG. 3A shows a packaging form using a steel container, and FIG. 3B shows a packaging form using an aluminum barrier.
As shown in FIG. 1, according to the method of packaging a seamed flux-cored welding wire intermediate product of the present invention, a method of packaging a seamed flux-cored welding wire intermediate product in which a flux is filled in a mild steel outer shell includes Step S1 of forming a stacked product, Step S2 of packaging, and Step S3 of deaerating that are performed in that order.
In the present invention, the term “intermediate product” means a product obtained before a process (e.g., wire drawing) for producing a final product is performed.
A wire intermediate product 2 packaged by the method of packaging a seamed flux-cored welding wire intermediate product of the present invention can be produced by a known method.
For example, a flux having a predetermined composition is filled in an outer shell having a circular cross section at a predetermined ratio while the outer shell is produced from a mild steel strip having a predetermined composition and a small thickness using, for example, a forming roller. Subsequently, the resulting outer shell is drawn with a wiredrawing machine for producing an intermediate product. Thus, for example, the wire intermediate product 2 having a diameter in the range of 2.0 to 5.5 mm can be produced.
In this case, preferably, a lubricant for ensuring the drawability during wire drawing for producing the final product, and holding oil for holding the lubricant are applied on the surface of the flux-cored wire intermediate product 2. As a result, the holding oil applied on the surface of the wire intermediate product 2 can prevent detachment of the lubricant from the surface of the wire intermediate product 2 due to vibration during transportation or a dry atmosphere and provide a satisfactory wire drawing property for a long period of time. Accordingly, excellent drawability can be maintained. The wire intermediate product 2 thus produced is then processed with a wiredrawing machine at another production facility to produce a final product having a diameter in the range of 0.6 to 1.6 mm.
The mild steel used as the outer shell and the flux filled in the outer shell are not particularly limited. Any mild steel and flux that are generally used can be used in the present invention.
Next, the steps of packaging the seamed flux-cored welding wire intermediate product of the present invention will be described.
First, in Step S1 of forming a stacked product, as shown in FIG. 2, the wire intermediate product 2 that is produced as described above and that has a diameter in the range of, for example, 2.0 to 5.5 mm is deposited or wound around a central member 3 in the form of a coil using this central member 3 as the center to produce a stacked product 1.
The depositing or the winding around the central member 3 can be performed with a depositing apparatus or a winding apparatus used in known methods. A hollow cylindrical stem, a solid or hollow cylindrical coil core, or the like can be used as the central member 3. The use of a hollow cylindrical stem or a hollow cylindrical coil core is advantageous in that the weight of the stacked product 1 formed by depositing or winding the wire can be reduced. On the other hand, as described below, the use of a solid cylindrical coil core is advantageous in that air and moisture in a metal package 4 can be substantially completely eliminated by packaging using the metal package 4 and then deaerating because the coil core is solid. The central member 3 can be formed using, for example, a metal such as iron, compressed paper, wood, or a plastic.
In addition, as shown in FIG. 2 and FIGS. 3A and 3B, a support plate 31 for supporting the wire intermediate product 2 is preferably provided on at least one end of the central member 3. In this case, in Step S1 of forming a stacked product 1, when the wire intermediate product 2 is deposited or wound around the central member 3 in the form of a coil using the central member 3 as the center, it is preferable that while the wire intermediate product 2 is being deposited or wound around the central member 3, the intermediate product 2 is supported by the support plate 31 (i.e., it is preferable that while the wire intermediate product 2 is deposited or wound, some amount of pressure is applied toward the support plate 31). In such a case, since the wire intermediate product 2 can be formed into a stacked product having a stable and satisfactory shape, the phenomenon in which the shape of the stacked product becomes distorted or deformed during transportation can be prevented. Furthermore, loops of the wire intermediate product 2 can be deposited or wound around the central member 3 in order. Therefore, when the wire intermediate product 2 is drawn out or wound off in wire drawing, the wire intermediate product 2 does not become tangled, and thus a satisfactory wire drawing property can be maintained. This support plate 31 may be attached to and detached from the central member 3.
In subsequent Step S2 of packaging, the stacked product 1 prepared as described above is packaged in a metal package 4 together with a desiccant. In the packaging in Step S2 of packaging, the metal package 4 including the wire intermediate product 2 may be completely sealed. Alternatively, in order to easily perform a deaeration operation in subsequent Step S3 of deaerating, the metal package 4 including the wire intermediate product 2 need not be completely sealed. More specifically, in the packaging of the stacked product 1, for example, an opening (not shown) communicating between the inside and the outside of the metal package 4 may be provided in at least a part of the metal package 4.
Examples of a desiccant 5 used in the present invention include a silica gel desiccant containing silica gel and a lime desiccant containing lime. However, any desiccant may be used as long as the desiccant can absorb moisture in the metal package 4 after packaging. The amount of desiccant 5 used is not particularly limited as long as the absorption of moisture by the wire intermediate product 2 can be prevented at least during transportation and storage of the wire intermediate product 2.
The metal package 4 used in the present invention is not particularly limited as long as the metal package 4 is a metal package that can be used as a closed container. Preferable examples thereof include a box 41 and a cover 42 that are made of an aluminum plate, a stainless steel plate, a steel plate, or the like, and a bag 43 made of an aluminum foil. A package from which at least water does not leak in a filling water test must be used as the metal package 4. If a package from which water leaks in the filling water test is used, a satisfactory moisture-proof property cannot be obtained. Accordingly, for example, when the wire intermediate product 2 is transported by sea over the equator, the wire intermediate product 2 may absorb moisture. As described below, when the bag 43 produced by using an aluminum foil is sealed by heat sealing, at least a sealing portion of the bag 43 is preferably laminated with a resin film such as a polyethylene film.
In subsequent Step S3 of deaerating, the metal package 4 is deaerated and sealed. Deaeration in the metal package 4 can be preferably performed using a pressure-reducing device (not shown) such as a normal vacuum pump. More preferably, the pressure-reducing device has a function of sealing an opening provided in the metal package 4 after the deaeration. The metal package 4 can be sealed as follows. In the case of a metal package 4 composed of a box 41 and a cover 42, after the wire intermediate product 2 is packaged and deaeration of the metal package 4 is performed, the box 41 and the cover 42 can be sealed by, for example, a rubber sealing or a resin caulking. In the case of a metal package 4 composed of a bag 43, after the wire intermediate product 2 is packaged and deaeration of the metal package 4 is performed, an opening can be sealed by heat sealing or using a zipper.
In the case where an opening is provided in at least a part of the metal package 4 in Step S2 of packaging, a pressure-reducing device may be connected to the opening to perform deaeration in the metal package 4. In the case where no opening is provided in the metal package 4 in Step S2 of packaging, preferably, an opening for connecting to a pressure-reducing device during deaeration is formed at any position of the metal package 4 and deaeration is then performed.
The package prepared by the above-described method of packaging a seamed flux-cored welding wire intermediate product of the present invention is shown in FIG. 3A or 3B.
As shown in FIGS. 3A and 3B, a package A of a seamed flux-cored welding wire intermediate product of the present invention (hereinafter, simply referred to as “package A”) is a package for packaging a wire intermediate product 2 in which a flux is filled in a mild steel outer shell. The package A includes a central member 3 which is disposed at the center of a coil-shaped stacked product 1 composed of a wire intermediate product 2, a metal package 4 which packages the central member 3 together with the stacked product 1 and which is deaerated, and a desiccant 5 packaged in the metal package 4.
Accordingly, the package A can package the whole central member 3 including the wire intermediate product 2 that is deposited or wound around the central member 3 in the form of a coil, and the resulting package A can be deaerated and further sealed. Therefore, the absorption of moisture by the wire intermediate product 2 can be effectively prevented by the desiccant 5 packaged therewith.
In the package A, a support plate 31 for supporting the wire intermediate product 2 is preferably provided on at least one end of the central member 3. The wire intermediate product 2 is preferably deposited around the central member 3 to form the stacked product 1 while the wire intermediate product 2 is supported by the support plate 31. In the package A, preferably, a lubricant for ensuring the drawability and holding oil for holding the lubricant are applied on the surface of the wire intermediate product 2. Furthermore, in the package A, the wire intermediate product 2 preferably has a diameter in the range of 2.0 to 5.5 mm. A further description of these features is omitted because those features have been described in detail in the description of the method of packaging a seamed flux-cored welding wire intermediate product of the present invention.

EXAMPLES

A description will now be made of examples in which the effect of the method of packaging a seamed flux-cored welding wire intermediate product of the present invention is confirmed.

Example 1

Vegetable-oil-based holding oil was applied on the surface of an intermediate product of a seamed flux-cored welding wire (2.55 mm in diameter (manufactured by Kobe Steel, Ltd.)) in which a flux was filled in a mild steel outer shell (hereinafter referred to as “wire intermediate product”). A dry drawing lubricant was applied thereon. The wire intermediate product was deposited around a simple hollow cylindrical stem to prepare a stacked product (800 kg). This stacked product was placed in a steel container composed of a box and a cover together with 100 g of silica gel and packaged. In this step, a thermohygrometer for measuring the temperature and the humidity in the steel container was attached to the container while care was sufficiently taken so that the hermeticity in the steel container was maintained. Subsequently, deaeration in the steel container was performed using a commercially available small aspirator to the same extent as Example 2 below. The box and the cover were then sealed by a rubber sealing to prepare a package of Example 1. Note that a filling water test had been performed in advance by filling the steel container with water and it had been confirmed that water leakage did not occur.

Example 2

As in Example 1, vegetable-oil-based holding oil was applied on the surface of a wire intermediate product, and a dry drawing lubricant was applied thereon. The wire intermediate product was deposited around a simple stem to prepare a stacked product (800 kg). This stacked product was placed in an aluminum barrier, which was a bag made of an aluminum foil, together with 100 g of silica gel and packaged. In this example, an opening was provided in a part of the aluminum barrier. In this step, as in Example 1, a thermohygrometer for measuring the temperature and the humidity in the aluminum barrier was attached to the aluminum barrier while care was sufficiently taken so that the hermeticity in the aluminum barrier was maintained. Subsequently, deaeration in the aluminum barrier was performed from the opening using a commercially available small aspirator to the extent that the aluminum barrier was adhered to the wire intermediate product. The opening was then sealed by heat sealing to prepare a package of Example 2.

Comparative Example

Furthermore, only a dry drawing lubricant was applied on the surface of the same wire intermediate product as that used in Example 1 without applying holding oil. The wire intermediate product was deposited around a simple stem to prepare a stacked product (800 kg). This stacked product was packaged in a polyethylene bag to prepare a package of Comparative Example. In packaging, the polyethylene bag was sealed without performing deaeration.
A transportation test was performed using the packages of Examples 1 and 2 and Comparative Example prepared as described above.
In the transportation test, the packages were transported by sea from Kobe to Singapore over the equator from Apr. 4, 2006 to May 11, 2006.
During the transportation test, the temperature and the humidity in each of the inside of the steel container of Example 1 and the inside of the aluminum barrier of Example 2 were measured with the thermohygrometer attached thereto every two hours. The temperature and the humidity of the outside air were also measured with another thermohygrometer. FIGS. 4A and 4B are plots showing the results. FIG. 4A is a plot showing the history of humidity inside and outside the steel container of Example 1 during the transportation test. In FIG. 4A, black circles represent the humidity of the inside of the steel container, and white triangles represent the humidity of the outside air. FIG. 4B is a plot showing the history of temperature and humidity inside and outside the aluminum barrier of Example 2 during the transportation test. In FIG. 4B, white circles represent the temperature of the outside air, black circles represent the temperature of the inside of the aluminum barrier, white triangles represent the humidity of the outside air, and black triangles represent the humidity of the inside of the aluminum barrier.
The moisture contents of the wire intermediate products of Examples 1 and 2 and Comparative Example were measured before the transportation test and after the transportation test. The moisture contents were measured in accordance with a Karl Fischer method (JIS K 0113).
Table 1 shows the moisture content of the wire intermediate products of Examples 1 and 2 and Comparative Example before the transportation test and after the transportation test.

TABLE 1

		Difference
		between
		moisture
		content of
		wire
Moisture	Moisture	intermediate
content of	content of	product before
wire	wire	transportation
intermediate	intermediate	test and that
product before	product after	after
transportation	transportation	transportation
test (ppm)	test (ppm)	test (ppm)

Example 1	101	112	11
Example 2	103	113	10
Comparative	108	189	81
Example

As shown in Table 1, regarding the wire intermediate products transported in the form of the packages using the steel container of Example 1 and the aluminum barrier of Example 2, the moisture content after the transportation test was increased by about 10 ppm compared with that before the transportation test. In contrast, regarding the wire intermediate product of Comparative Example, the moisture content after the transportation test was increased by about 80 ppm compared with that before the transportation test. That is, according to Examples 1 and 2, the increase in the moisture content could be reduced to ⅛ of that in Comparative Example.
Furthermore, the shapes of the stacked products including the wire intermediate products of Examples 1 and 2 were visually observed. According to the results, in the wire intermediate products of Examples 1 and 2, neither distortion nor deformation of the shapes of the stacked products was observed before and after the transportation test.
The method of packaging a seamed flux-cored welding wire intermediate product and a package of a seamed flux-cored welding wire intermediate product according to the present invention have been described in detail using preferred embodiments and examples. However, the gist of the present invention is not limited to the above descriptions and should be widely interpreted on the basis of the description of the claims. Furthermore, it should be understood that inventions changed or modified on the basis of the descriptions of the claims and the specification of this application are also included in the equivalent scope of the present invention.

Claims

1. A method of packaging a seamed flux-cored welding wire intermediate product in which a flux is filled in a mild steel outer shell, comprising the steps of:

forming a stacked product by depositing or winding a seamed flux-cored welding wire intermediate product around a central member in the form of a coil using the central member as the center;

packaging the stacked product in a metal package together with a desiccant; and

deaerating and sealing the metal package.

2. The method of packaging a seamed flux-cored welding wire intermediate product according to claim 1,

wherein a support plate for supporting the seamed flux-cored welding wire intermediate product is provided on at least one end of the central member, and

in the step of forming a stacked product, the stacked product is formed by depositing or winding the seamed flux-cored welding wire intermediate product around the central member in the form of a coil while the seamed flux-cored welding wire intermediate product is supported by the support plate.

3. The method of packaging a seamed flux-cored welding wire intermediate product according to claim 1,

wherein, before the step of forming a stacked product, a lubricant for ensuring the drawability and holding oil for holding the lubricant are applied on the surface of the seamed flux-cored welding wire intermediate product.

4. The method of packaging a seamed flux-cored welding wire intermediate product according to claim 1,

wherein the seamed flux-cored welding wire intermediate product has a diameter in the range of 2.0 to 5.5 mm.

5. A package for packaging a seamed flux-cored welding wire intermediate product in which a flux is filled in a mild steel outer shell, comprising:

a central member disposed at the center of a coil-shaped stacked product which is composed of a seamed flux-cored welding wire intermediate product and which is prepared using the central member as the center;

a metal package which packages the central member together with the stacked product and which is deaerated; and

a desiccant packaged in the metal package.

6. The package of a seamed flux-cored welding wire intermediate product according to claim 5,

wherein a support plate for supporting the seamed flux-cored welding wire intermediate product is provided on at least one end of the central member.

7. The package of a seamed flux-cored welding wire intermediate product according to claim 5,

wherein a lubricant for ensuring the drawability and holding oil for holding the lubricant are applied on the surface of the seamed flux-cored welding wire intermediate product.

8. The package of a seamed flux-cored welding wire intermediate product according to claim 5,