JP2002220684A - Magnesium alloy molded product having a bright rust-proof treatment structure, its manufacturing method, its manufacturing apparatus, and equipment exterior parts formed of a magnesium alloy molded product having a bright rust-proof treatment structure - Google Patents

Abstract

(57) [Problem] To provide a magnesium alloy molded article having a brilliant rust-proof treatment structure having a rust-proof protective film excellent in corrosion resistance without lowering the brightness of a brilliant surface. SOLUTION: The magnesium alloy molded product having a bright rust-proof treatment structure of the present invention is obtained by forming a transparent rust-proof film made of an organic acid amine salt on a cut surface of a magnesium alloy molded product body, A transparent resin film is formed thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnesium alloy molded product, and more particularly, to a magnesium alloy molded product having a brilliant rust prevention treatment structure, a method of manufacturing the same, and an apparatus for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, magnesium alloys have been attracting attention as exterior parts of equipment because of their ease of recycling, light weight, and excellent heat radiation characteristics. As a group of products in which this magnesium alloy is used, it has been put to practical use in exterior parts of portable home electric appliances (notebook personal computers, portable cassette tape players, portable MD players, etc.), and wheels related to vehicles. . Magnesium alloy is mainly AZ9 for casting.
There are 1 series and AD31 series for sheet metal, but most of them are for casting and are formed by die casting and thixomolding.

[0003] On the surface of exterior parts of portable home electric appliances, there is a surface on which a logo such as a brand name is displayed. In many cases, such a logo is attached with a luminous-treated batch or the like in order to promote the product image. However, in a small-sized device such as a portable cassette tape player or a portable MD player in which weight reduction is important, the exterior parts are often directly cut to create a glittering surface and display a logo or the like. When an aluminum material is used as an exterior part, it is possible to form a brilliant surface without special treatment on the cut surface because of its excellent corrosion resistance. However, aluminum materials are inferior to magnesium alloys in lightness and workability, and the use of magnesium alloys as exterior parts is desired. However, when a magnesium alloy is used as an exterior component, the corrosion resistance is poor, so it was necessary to apply some anti-corrosion treatment to the cut surface to create a glittering surface.

[0004] The anticorrosion treatment method for the shiny surface includes (1) anodizing method: forming a transparent anodic oxide film and forming a transparent protective resin film thereon, and (2) vapor deposition method: corrosion-resistant metal such as aluminum. And a method of forming a transparent protective resin film thereon is proposed and put to practical use.

[0005]

However, the above-mentioned method for preventing corrosion of a glittering surface which has been put to practical use has the following problems.

(1) In the anodic oxidation method, a complicated jig is required for electrically contacting a desired position of the processing member, and a mechanism for confirming an electrical contact state during the anodic oxidation process. Was needed. Further, there is a problem that the bright surface formed by this anodic oxidation method has low brightness and does not have the original brightness of the cut surface.

(2) In the vapor deposition method, when a large area is subjected to anticorrosion treatment, it can be dealt with by masking, but it is very difficult to treat a small and complicated ground surface such as a brand name. . In addition, there is a problem that the vapor deposition method is expensive. An object of the present invention is to solve the conventional problems and to obtain a magnesium alloy molded article having a brilliant rust-proof treatment structure having a rust-preventive protective film having excellent corrosion resistance without lowering the brightness of a brilliant surface.

[0008]

According to the present invention, there is provided a magnesium alloy molded article having a brilliant rust-preventive treatment structure, comprising a magnesium alloy molded article having a cut surface having a desired shape, and an organic material formed on at least the cut surface. It has a transparent rust preventive film made of an acid amine salt and a transparent resin film formed on the transparent rust preventive film. The magnesium alloy molded product formed in this way forms a water-repellent transparent rust-preventive film on the surface by immersion in an alkaline aqueous solution, and then forms a protective film of a transparent resin film on the magnesium alloy cutting surface. A rust preventive protective film having excellent corrosion resistance is formed without lowering the brightness of a certain bright surface.

According to the present invention, there is provided a method for manufacturing a magnesium alloy molded article having a bright rust-proof treatment structure, wherein a coating film forming step of forming at least a coating film on a magnesium alloy molded article body, and cutting at least a part of the coating film. A cutting step of forming a cutting surface, and after the cutting step, a step of bringing the magnesium alloy molded article body into contact with an aqueous solution of an organic amine salt, and contacting the magnesium alloy molded article body with the aqueous solution of the organic amine salt. The method includes a step of forming a transparent rust-preventive film by washing and drying, and a step of applying a transparent resin solution and curing the applied solution to form a transparent resin film. Magnesium alloy molded products manufactured in this way, the brightness of the bright surface that is the cutting surface of the magnesium alloy does not decrease,
A rust-proof protective film with excellent corrosion resistance is formed.

An apparatus for manufacturing a magnesium alloy molded article having a bright rust-proof treatment structure according to the present invention is an apparatus for forming a transparent rust-proof film on a magnesium alloy molded article having a bright rust-proof treatment structure, wherein the cut surface is A first device for bringing an aqueous solution of an organic acid amine salt into contact with the formed magnesium alloy molded product body, and a second device for removing unnecessary organic acid amine salt aqueous solution in the magnesium alloy molded product body by washing with water And a third device for draining and drying the magnesium alloy molded product body, and sequentially transporting the magnesium alloy molded product body from the first device to the third device via the second device. And a transport device. With this manufacturing apparatus, a rust-preventive protective film having excellent corrosion resistance is formed without lowering the brightness of the glittering surface, which is the cutting surface of the magnesium alloy molded product.

An apparatus for manufacturing a magnesium alloy molded article having a bright rust-proof treatment structure according to the present invention is an apparatus for forming a transparent rust-proof film on a magnesium alloy molded article having a bright rust-proof treatment structure, wherein the cut surface is A turntable on which the formed magnesium alloy molded body can be placed; a discharge port disposed vertically above the turntable to discharge an organic acid amine salt aqueous solution to the magnesium alloy molded body; A nozzle for discharging water for washing into the magnesium alloy molded article main body. With this manufacturing apparatus, a rust-preventive protective film having excellent corrosion resistance is formed without lowering the brightness of the glittering surface, which is the cutting surface of the magnesium alloy molded product.

[0012] An equipment exterior part composed of a magnesium alloy molded article having a brilliant rust prevention treatment structure according to the present invention comprises: a magnesium alloy molded article main body having a cut surface of a desired shape;
It has a transparent rust preventive film made of an organic acid amine salt formed on at least the cut surface, and a transparent resin film formed on the transparent rust preventive film. A rust-preventive protective film having excellent corrosion resistance is formed on the exterior device component of the magnesium alloy molded product formed as described above without lowering the brightness of the brilliant surface that is the cut surface.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a magnesium alloy molded article having a brilliant anti-rust treatment structure according to the present invention will be described below with reference to the accompanying drawings.

<< First Embodiment >> FIG. 1 shows a first embodiment according to the present invention.
FIG. 2 is a perspective view showing an example of the appearance of an exterior component in a portable household electrical appliance, which is a magnesium alloy molded product having a bright rust-proof treated surface according to the embodiment. FIG. 2 is a cross-sectional view showing the structure of the bright rust-proof surface of the exterior component of FIG. FIG.
FIG. 3 is a view showing a schematic configuration of a manufacturing apparatus for forming a bright rust-prevention treated surface on the magnesium alloy molded product of the first embodiment, and shows respective forming steps of the bright rust-preventive treated surface.

As shown in FIG. 1, the exterior component of the first embodiment is a magnesium alloy molded product, for example, an upper lid of a portable MD player which is a portable audio device.
A logo is displayed on the surface of the exterior component by a bright surface. This bright surface has been subjected to a bright rust prevention treatment. FIG. 2 shows an enlarged cross-sectional structure of the exterior component shown in FIG.

As shown in FIG. 2, a rust preventive film 2 is formed on the surface of the magnesium alloy molded article body 1 as a base rust preventive treatment, and a coating film 3 is formed on the rust preventive film 2. Is formed. A part of the surface of the magnesium alloy molded product body 1 subjected to the rust-prevention treatment in this way is cut to display a logo, thereby forming a cut surface 4 on which the background of the magnesium alloy appears.

A transparent transparent rust-proof film 5 and a transparent resin film 6 are formed on the cut surface 4 on the surface of the magnesium alloy molded article body 1 thus formed, and subjected to a bright rust-proof treatment. I have. The transparent rust preventive film 5 is formed by an immersion method described later, and the transparent resin film 6 is formed by painting. Therefore, the transparent rust preventive film 5 is formed only on the cutting surface 4, and the transparent resin film 6 is formed on the entire surface of the magnesium alloy molded product body 1 including the cutting surface 4.

Next, a description will be given of a forming method for forming a bright rust-proofed surface on the magnesium alloy molded product of the first embodiment configured as described above. First, a method for manufacturing a magnesium alloy molded body before forming a bright rust-proofing treated surface will be specifically described. The magnesium alloy molded product main body 1 in the first embodiment is used for an upper lid of a portable MD player, and is formed by using a thixomolding machine manufactured by Nippon Steel Works Co., Ltd. using AZ91D magnesium alloy as a raw material. . Thereafter, a magnesium phosphate coating was formed as the rust prevention film 2 through the steps of degreasing, surface conditioning and conversion coating as base rust prevention.

In the rust preventive treatment of the first embodiment, the degreasing treatment was carried out by immersing in a sodium phosphate aqueous solution at 60 to 70 ° C. for 3 minutes. In addition, the surface conditioning treatment is performed by adding a sodium hydroxide aqueous solution of 70 to 90 ° C.
Invaded for 0 minutes. Furthermore, the conversion coating treatment is 55-65 ° C.
For 3 minutes in an aqueous solution of calcium phosphate. The coating film 3 is formed on the magnesium alloy molded body on which the base rust prevention treatment has been completed. The coating film 3 was formed by applying and drying an epoxy-based primer and then performing an acrylic metallic coating as a top coat. The rust prevention film 2 and the coating film 3 are cut to form a cut surface 4 in order to display a desired logo or the like using a lathe on the magnesium alloy molded body coated as described above. In order to form the cutting surface 4 on the magnesium alloy compact in this manner, the magnesium alloy compact is cut by a lathe to expose the magnesium alloy material. Thus, the cutting surface 4
Is simply referred to as a compact 1A in the following description.

Next, the molded body 1A formed as described above
A method for forming a bright rust-proof surface on the surface will be described.
FIG. 3 is a process chart showing each step of forming a bright rust-proof surface on the molded body 1A. In the first step 12, the molded body 1A having the cutting surface 4 formed as described above is immersed in a tank filled with the organic acid amine salt aqueous solution 11, and the entire surface is immersed in the organic acid amine salt aqueous solution 11. Make contact. First step 1
In 2, the sample is immersed in a tank filled with the aqueous solution of the organic acid amine salt 11 at room temperature for about 30 seconds.

Next, in a second step 13, the unnecessary organic acid amine salt aqueous solution 11 is removed by washing with water. The water washing step of the second step is divided into two steps, a first step 13a of preliminary cleaning and a second step 13b of finish cleaning. In a first step 13a, the compact 1A treated in the first step 12 is immersed in an immersion tank filled with deionized water, and a preliminary cleaning is performed. Next, in a second step 13b, the compact 1A is placed in a shower cleaning tank from which cleaning water is jetted, and finish cleaning is performed.

The molded body 1A after the above-mentioned washing step is finished,
In the third step 14, drainage drying is performed. Third
In the third step 14, the molded body 1A that has been washed with water in step 14 is blown with air by the air shower 16 to the molded body 1A, and drained and dried. Through the above steps, a water-repellent transparent rust-preventive film 5 is formed on the cut surface 4 of the molded body 1A of the magnesium alloy. Is done. In the first embodiment, the thickness of the transparent rust preventive film 5 is several tens nm.
Met.

In the first embodiment, a plurality of compacts 1A are hung on a holder 15 so that a plurality of compacts 1A can be processed at the same time, and the holder 15 is moved by a transfer means such as a belt conveyor. It is configured to be sequentially transferred to the process. Further, a transparent resin film 6 is formed on the molded body 1A on which the water-repellent transparent rust prevention film 5 formed as described above is formed as final rust prevention. As a material of the transparent resin film 6, an epoxy resin was used. As the transparent resin film 6, a film mainly containing a thermosetting organic resin or a film mainly containing an ultraviolet curable organic resin is used. The transparent resin film 6 is applied by spray coating, baked at 160 ° C. for 20 minutes, and
An m-thick transparent film was formed.

The portable M formed as described above
The inventor performed reliability evaluation such as a salt spray test and a high-temperature and high-humidity test on the upper lid of the D player. As a result, good results were obtained. As described above, the magnesium alloy molded article formed by the manufacturing apparatus of the first embodiment forms a water-repellent transparent rust prevention film on the surface by immersion in an alkaline aqueous solution, and then forms a protective film of a transparent resin film. Thus, a rust-preventive protective film having excellent corrosion resistance is formed without lowering the brightness of the glittering surface, which is the cutting surface of the magnesium alloy.

<< Second Embodiment >> Next, a second embodiment of a manufacturing method and a manufacturing apparatus for manufacturing a magnesium alloy molded article having a brilliant rust-proof treatment structure according to the present invention will be described with reference to FIG. It will be described with reference to FIG. In a second embodiment,
Components having the same configurations and functions as the components in the first embodiment described above are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 4 is a view showing a schematic configuration of a manufacturing apparatus according to a second embodiment for forming a bright rust preventive surface on a magnesium alloy molded product, and shows respective forming steps of the bright rust preventive process. . The magnesium alloy compact 1A having the cutting surface 4 is manufactured in the same manner as the manufacturing method in the first embodiment. As described in the first embodiment, the rust preventive film 2 is formed on the surface of the magnesium alloy molded article main body 1, and the coating film 3 is formed on the rust preventive film 2.
In this way, a part of the surface of the magnesium alloy molded article body 1 subjected to the rust-preventive treatment is cut to display a logo having a desired shape, and the cut surface 4 on which the background of the magnesium alloy appears is formed.

On the cut surface 4 on the surface of the magnesium alloy molded article body 1 thus formed, a transparent transparent rust-proof film 5 and a transparent resin film 6 are formed in the same manner as in the first embodiment. Then, a bright rust-proof treatment is performed. The transparent rust preventive film 5 is formed by a flow-down method described later, and the transparent resin film 6 is formed by painting. Therefore, the transparent rust preventive film 5 is formed only on the cutting surface 4, and the transparent resin film 6 is formed on the entire surface of the magnesium alloy molded product body 1 including the cutting surface 4.

Next, in the second embodiment, the transparent rust preventive film 5
The flow-down method used for forming the following will be described. FIG.
FIG. 2 is a schematic configuration diagram showing each forming step in a manufacturing apparatus used for forming a transparent rust-proof film 5. As shown in FIG. 4, in the apparatus for manufacturing a magnesium alloy molded product according to the second embodiment, a magnesium alloy molded product (formed product) 1A having a cutting surface 4 formed thereon is used as a transport means in each forming step in the flow-down method. Is transported by the conveyor 22 of FIG. The molded body 1A on which the cutting surface 4 is formed is held substantially horizontally by a plurality of holders 21 formed in one unit.

First, the plurality of compacts 1A held by the holder 21 are transferred to the first area 24 by the conveyor 22. In the first region 24, the organic acid amine salt aqueous solution 23A flows down from a plurality of discharge ports of the pipe 23 fixed at a predetermined position. Each molded body 1A is exposed to the organic acid amine salt aqueous solution 23A in the first region 24 for a predetermined time.

Next, the compact 1 that has passed through the first region 24
A is a second area 2 which is a cleaning step by the conveyor 22.
Transferred to 6. In the second region 26, deionized water 25A flows down from a plurality of outlets of the pipe 25 fixed at a predetermined position. Each compact 1A is washed with the deionized water 25A for a predetermined time. Thus, the second
In the region 26, the unnecessary organic acid amine salt aqueous solution 23A is washed and removed while the molded body 1A passes.
Finally, the plurality of molded bodies 1A held by the holder 21
Is transferred to the third region 28 which is a drying step. An air knife 27 is installed in this third area,
The compressed air is blown onto the molded body 1A by the air knife 27, and the molded body 1A is drained.

As shown in FIG. 4, in the second embodiment, a plurality of compacts 1A held by a holder 21 are separated by a conveyor 22 into a first area 24, a second area 26, and a third area. 28, a transparent rust preventive film 5 is formed at a desired position on the molded body 1A. In the second embodiment, only the configuration in which the molded body 1A passes through the first region 24, the second region 26, and the third region 28 has been described, but the apparatus for manufacturing a magnesium alloy molded product according to the present invention is described. In the above, the molded body 1A is transported to the first area 24 while being held by the holder 21 and then immediately after passing through the third area 28 by another transport means. The process is carried out to form the transparent resin film 6.

As described above, the magnesium alloy molded article formed by the manufacturing apparatus of the second embodiment forms a water-repellent transparent rust-preventive film on the surface thereof by flowing down to an alkaline aqueous solution, and then forms a transparent resin film. By forming the protective film by the above, a rust-preventive protective film having excellent corrosion resistance is formed without lowering the brightness of the glittering surface, which is the cut surface of the magnesium alloy.

<< Third Embodiment >> Next, a third embodiment of a manufacturing method and a manufacturing apparatus for manufacturing a magnesium alloy molded article having a brilliant rust-prevention treatment structure according to the present invention will be described with reference to FIG. It will be described with reference to FIG. In a third embodiment,
Components having the same configurations and functions as those of the components in the first and second embodiments described above are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 5 is a diagram showing a schematic configuration of a manufacturing apparatus for forming a magnesium alloy molded product having a bright rust-proofed surface according to the third embodiment. In the manufacturing apparatus according to the third embodiment, a magnesium alloy compact (formed compact) 1A on which a cutting surface 4 is formed is placed on a turntable 31 that rotates at a predetermined speed around a shaft 31A. Have been. A pan 34 is formed around the lower part of the turntable 31, and an organic acid amine salt aqueous solution 3 is formed above the turntable 31.
A discharge port 32A for discharging the second and a nozzle 33A for discharging the deionized water 33 are arranged.

In the manufacturing apparatus configured as described above,
First, the compact 1A is placed on the turntable 31. In this state, the organic acid amine salt aqueous solution 32 is dropped from the discharge port 32A so that the whole of the molded body 1A can be applied. After leaving for about 20 seconds in the state where the whole is applied, the turntable 31 is rotated at a rotation speed of 300 rpm to blow off the processing liquid adhering to the molded body 1A.

Next, deionized water 33 is jetted from the nozzle 33A to the molded body 1A, and the unnecessary organic acid amine salt aqueous solution 32 is washed. Thereafter, the turntable 31 is rotated at a rotation speed of about 1500 rpm for about 10 seconds, and the deionized water is blown off by centrifugal force due to the rotation, and the compact 1A
Is drained. As described above, in the apparatus for manufacturing a magnesium alloy molded product of the third embodiment, the use of the turntable 31 enables the bright rust prevention treatment to be efficiently and quickly performed with a simple configuration, and the processing speed is reduced. Fast and excellent manufacturing equipment can be obtained.

As described above, the magnesium alloy molded article formed by the manufacturing apparatus of the third embodiment forms a water-repellent transparent rust-preventive film on the surface by a dropping treatment to an alkaline aqueous solution, and then forms a transparent resin film. By forming the protective film by the above, a rust-preventive protective film having excellent corrosion resistance is formed without lowering the brightness of the glittering surface, which is the cut surface of the magnesium alloy.

[0038]

As apparent from the detailed description of the embodiments, the present invention has the following effects.
Since the magnesium alloy molded product having the bright rust-proof treatment structure according to the present invention forms a water-repellent transparent rust-preventive film on the surface by immersion in an alkaline aqueous solution, and then forms a protective film of a transparent resin film. Also, it has a rust-preventive protective film having excellent corrosion resistance without lowering the brightness of the bright surface, which is a cutting surface of a magnesium alloy. According to the present invention, a transparent rust-preventive film made of an organic acid amine salt is formed on a cutting surface of a magnesium alloy, and a transparent resin film is formed thereon. The manufacturing process is simpler than that of a rust-preventive protective film formed by using an anodized film or an anodic oxide film.

According to the method and the apparatus for manufacturing a magnesium alloy molded article having a brilliant anti-rust treatment structure according to the present invention, no electrical means is required in the manufacturing process.
Since the rust prevention film can be formed by the immersion method, a magnesium alloy molded product can be manufactured with simple manufacturing equipment. Further, according to the method and the apparatus for manufacturing a magnesium alloy molded article having a brilliant rust preventive treatment structure according to the present invention, the brilliant rust preventive treatment is not affected by the size and shape of the cut surface, It is possible to cope with a cut surface having a size and a shape, and it is possible to easily manufacture an external component of a portable home appliance, for example, a portable audio device.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an exterior component which is an example of a magnesium alloy molded product having a bright rust prevention treatment structure according to the present invention.

FIG. 2 is a cross-sectional view showing a cross-sectional structure of a magnesium alloy molded product having a bright rust-proofing treatment structure according to the present invention.

FIG. 3 is an explanatory view showing each manufacturing process in a manufacturing apparatus of a magnesium alloy molded product having a bright rustproofing treatment structure according to a first embodiment of the present invention.

FIG. 4 is an explanatory view showing each manufacturing process in a manufacturing apparatus of a magnesium alloy molded product having a bright rust prevention treatment structure according to a second embodiment of the present invention.

FIG. 5 is an explanatory view showing a method of manufacturing a magnesium alloy molded product having a bright rustproofing treatment structure according to a third embodiment of the present invention using a manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnesium alloy molded product main body 1A Molded body 2 Rust prevention film 3 Paint film 4 Cutting surface 5 Transparent rust prevention film 6 Transparent resin film 11 Organic acid amine salt aqueous solution 12 First area 13 Second area 14 Third area 15 Holder 16 Air shower 21 Holder 22 Conveyor 23 Organic acid amine salt aqueous solution 24 First area 25 Deionized water 26 Second area 27 Air knife 28 Third area 31 Turntable 32 Organic acid amine salt aqueous solution 32A Discharge port 33 Desorption Ionized water 33A nozzle

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B05D 7/24 301 B05D 7/24 301T B22D 29/00 B22D 29/00 GF Term (Reference) 4D075 AB01 AC64 AC72 AC74 BB65X BB65Y CB04 DB01 DB70 DC13 DC18 DC38 EA06 EA19 EA21 EA43 4F040 AA12 AB04 AC02 BA42 CC06 CC16 CC19 DB14 DB18 4F041 AA05 AB02 BA07 BA13 BA54 4F042 AA06 DA01 DA06 DA08 DC00 EB17 EB25 FA12 EB25 FAB

Claims (11)

[Claims] 1. A main body of a magnesium alloy molded article having a cutting surface of a desired shape, a transparent rust-proof film made of at least an organic acid amine salt formed on at least the cut surface, and formed on the transparent rust-proof film. A magnesium alloy molded product having a brilliant rust-prevention treatment structure having a transparent resin film. 2. The magnesium alloy molded product having a bright rust-proof treatment structure according to claim 1, wherein the transparent resin film is mainly composed of a thermosetting organic resin. 3. The magnesium alloy molded article having a brilliant rust-proof treatment structure according to claim 1, wherein the transparent resin film is mainly composed of an ultraviolet-curable organic resin. 4. A coating film forming step of forming at least a coating film on the magnesium alloy molded article main body; a cutting step of cutting at least a part of the coating film to form a cut surface; A step of contacting the body of the alloy molded article with an aqueous solution of an organic amine salt; a step of forming a transparent rust preventive film by washing and drying the body of the magnesium alloy molded article in contact with the aqueous solution of the organic amine salt; and applying a transparent resin solution. And then curing to form a transparent resin film. 5. An apparatus for forming a transparent rust-preventive film on a magnesium alloy molded article having a bright rust-proof treatment structure, wherein an aqueous solution of an amine salt of an organic acid is brought into contact with the magnesium alloy molded article body having a cut surface formed thereon. A second device for removing unnecessary organic acid amine salt aqueous solution in the magnesium alloy molded product body by washing with water; and a third device for draining and drying the magnesium alloy molded product body. An apparatus for manufacturing a magnesium alloy molded article, comprising: an apparatus; and a transporting apparatus that sequentially transports the magnesium alloy molded article main body from the first apparatus to the third apparatus via the second apparatus. 6. The apparatus for manufacturing a magnesium alloy molded product according to claim 5, wherein said first device is configured to immerse said magnesium alloy molded product main body in a immersion tank filled with an organic acid amine salt aqueous solution. 7. The first device, wherein the conveying device moves the magnesium alloy molded article body substantially horizontally.
The apparatus for manufacturing a magnesium alloy molded product according to claim 5, wherein the apparatus is configured to be sequentially conveyed to the second device and the third device. 8. The apparatus for manufacturing a magnesium alloy molded product according to claim 7, wherein the first device is configured to drop an aqueous solution of an organic acid amine salt onto the transported magnesium alloy molded product main body from above. 9. An apparatus for forming a transparent rust-preventive film on a magnesium alloy molded product having a bright rust-proofing treatment structure, the turntable (31) capable of mounting a magnesium alloy molded product body having a cut surface formed thereon. A discharge port disposed vertically above the turntable to discharge an organic acid amine salt aqueous solution to the magnesium alloy molded product body; and a discharge port disposed vertically above the turntable and washed with water for washing the magnesium alloy molded product body. A magnesium alloy molded product, comprising: 10. A magnesium alloy molded article main body having a cutting surface of a desired shape, a transparent rust preventive film made of at least an organic acid amine salt formed on the cut surface, and formed on the transparent rust preventive film. Equipment exterior parts composed of a transparent resin film and a magnesium alloy molded product having a brilliant rust-proof treatment structure having 11. The equipment exterior part according to claim 10, wherein the equipment exterior part of the magnesium alloy molded product having a bright rust prevention structure is an exterior part of a portable audio equipment.