KR940007403B1 - Method of polyshing coated metal surface - Google Patents

Abstract

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Description

Polishing method of metal coating surface

1 is a perspective view of a holder of a sandpaper used in the embodiment of the present invention.

2 is a workflow chart showing a process of the embodiment.

3 is a perspective view showing another example of the sandpaper holder.

* Explanation of symbols for main parts of the drawings

1, 11: holder 2, 12: hard material

3: rubber sheet 5, 15: sandpaper

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of polishing a metal painted surface for polishing a metal coated surface such as a vehicle body surface to have high gloss.

The painted surface of an automobile, in particular a luxury car, is subjected to baking drying treatment by a paint shop during the manufacture of a new vehicle, and is excellent in gloss and durability.

On the other hand, in painting and polishing accompanying maintenance of automobiles, it is difficult to carry out the bake-drying treatment because the vehicle body temperature cannot be raised to 70 ° C. or higher due to the presence of interior materials.

Therefore, the treatment of the surface of the car body after painting has a significant effect on the surface gloss after painting, and therefore, high quality salting is required. In the conventional polishing after such coating, polishing is performed by maintaining a compound having a medium particle size in a towel buff, and then finishing polishing by maintaining a fine or extremely fine compound in a wool sponge. However, in the conventional polishing method, it is difficult to completely remove the buff marks and the surface gloss is not sufficiently exhibited, and there is a problem that the gloss is damaged due to white clouding after the coating.

The present invention aims to solve the above problems, and to provide a method of polishing a metal coating surface having a high gloss and no white clouding.

In order to solve the said subject, the 1st grinding | polishing method of this invention is characterized by grind | polishing a metal coating surface sequentially by the process of following (1)-(4).

(1) sandpaper polished with water, (2) finely pulverized wool buffs, and (3) sponge buffs with a compound having the same roughness as the compound used in step (2). (4) Grind with a fine snow sponge buff holding the compound of ultrafine particles.

Next, the second polishing method of the present invention is characterized in that the metal packaging surface is sequentially polished by the following steps (1) to (5).

(1) sandpaper polished with water, (2) a fine wrought wool buff, and (3) a coarse sponge buff with a compound having the same roughness as the compound used in the step (2). (4) a sponge buff having the same roughness as the sponge buff of (3) above, and maintaining a very fine compound, and (5) maintaining the compound of the ultrafine particles. Grind with a fine sponge sponge.

In the said process (1), what has a roughness called 800-2000 is used for sand paper, for example. According to this number, the size of the grindstone particles in the paper surface is an average of 19 to 10 µm.

The depth of abrasive scratches caused by the grindstone particles is about 1/10 of the size of the grindstone grains of the sandpaper.

Next, the compound used after the process of (2) is illustrated as follows.

TABLE 1

As said compound, what has the following characteristics is preferable.

① It should have abrasive force (cutting force).

② No deep scratches will occur.

③ less tangling about the buff.

④ Wiping should be simple.

⑤ Shatter less when buffing.

⑥ Oral toxicity, less skin irritation.

And it is preferable that the wool buff holding the compound is made of wool fibers having a suitable hardness. In other words, sponge buffs, towel buffs, and soft wool buffs are difficult to erase the paper country.

In addition, if the sponge buff is made of a coarse foam, it is difficult to get gloss on the metal coating surface and become cloudy after polishing. Therefore, a foam having a suitable size is used.

As the coarse sponge buff, for example, a synthetic foamed sponge having a density of 70 to 90 kg / m ³ and a cell number of 30 to 45 / in ³ is used, and as a fine eye sponge buff, for example, a density of 25 to 35 kg / m ³ and a cell number of 50 to 60 in ³ Use synthetic foamed sponge.

That is, according to the above invention, rough polishing of the metal surface is performed by water polishing using sand paper in the first step.

Subsequently, in the second step, by maintaining the fine compound in the wool buff and polishing, the grinding marks due to the paper are eliminated and the thin wool buff marks due to the wool buff are generated. In addition, by using a rough sponge buff in the third process, and maintaining a polishing compound of the roughness as described above, the wool buffing station is surely disappeared and the marks of the rough sponge are generated.

This rough sponge buff in the small fourth process is extinguished by polishing by a fine sponge buff that maintains a very fine compound, and hardly any buff marks remain on the metal surface and are only fine even if they remain.

The above polishing method can be applied when the buff marks after the third process are relatively fine. By the way, when the buff marks after the third step are not relatively fine, the step of adding a step of polishing with a rough sponge holding a very fine compound between the third step and the fourth step, and then polishing at step 5 desirable. By inserting this additional step after the third step, the passed sponge buff mark after the third step disappears, leaving a new, fine sponge buff mark. In this case, the fine sponge buff marks remaining by this additional process are extinguished by grinding by a fine snow sponge buff that maintains the compound of the ultrafine particles, which is the final process, and almost no buff marks remain on the metal surface. It is only a minute.

In this way, the metal surface is in a state of high gloss and the gloss does not become blurred later.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

Prior to the description of the polishing method according to this embodiment, a holder for sandpaper used for polishing with water will be described.

The holder 1 is constituted by a solid material (for example, a piece of wood, 85 × 70 × 10 mm) 2 having a rectangular parallelepiped shape, and a rubber plate 3 provided by adhesion to one surface of the hard material 2.

Moreover, the recessed parts 2a and 2a are formed in the side surface of the hard material 2, respectively, and it makes it easy to hold and support by hand. Moreover, one of the said rubber plates 3 protrudes slightly rather than the end surface of the hard material 2, and this protrusion part 3a can be used for removing water. Furthermore, the velvet fastener 4 is attached to one side (the surface of the rubber plate 3 in the figure) and both sides of the hard material 2 by adhesion. When the usage method of this holding tool 1 is demonstrated, the sandpaper 5 with water resistance is previously selected from 1500-2000 meshes. The sandpaper 5 is fixed to a surface selected from the hard portion or the rubber plate portion in the middle of both surfaces of the hard material 2.

When the rubber plate portion is selected here, the pressing force is evenly transmitted to the sand paper 5 evenly by the elastic force of the rubber plate 3 when polishing, and the polishing can be performed evenly. Therefore, there is no restriction that the part of the polished surface is not deeply scratched more than necessary and the sand paper of the thin eye must be used as in the prior art. Therefore, the sandpaper with the most suitable number can be used and work can be efficiently performed.

In addition, when the hard paper is selected and the sand paper 5 is attached, it is most suitable for the polishing of the telelicated part which needs to change the pressure buoyant subtly.

① The sandpaper 5 is attached to the surface of the rubber plate 3 side of the holder 1 through the velvet fastener 4 (the velvet fastener 4 and the back surface of the sand paper 5 are fixedly attached). Provide water polishing.

(2) Then attach (hold) a fine compound consisting of 100 roughnesses to the wool buff, attach the wool buff to the polisher, and apply pressure to the polished surface while rotating the wool buff at a rotation speed of 1200 to 2000 r.p.m. By this polishing, the paper marks due to the paper polishing are removed, and the thin wool buff marks remain.

③ Then, the sponge buff is made by maintaining a compound composed of 100 roughnesses (roughness same as the above process) in a sponge buff made of a flexible urethane foam with a roughness (density 70-90 kg / m ³ and cell number 30-45 / in ³ ). It adheres to a polisher similarly to the said process, and grinds, rotating at 1200-2000 r.pm. By this polishing, the wool buff mark is erased, and a glossing action is obtained while leaving a finer sponge buff mark.

(4) A very fine compound having a roughness of 200 in a sponge buff having the same roughness as that described above is kept and polished by a polisher while rotating at 1200 to 2000 r.p.m. This polishing eliminates the sponge buff mark and leaves a finer sponge buff mark, and at the same time obtains the glossiness effect.

⑤ Then, the above-described process was carried out by maintaining a compound of ultra fine particles having a roughness of 300 times in a sponge buff made of a soft urethane foam having a roughness of a thin eye (density 25 to 35 kg / m ³ , cell number 50 to 60 / in ³ ). In the same manner, polishing is carried out using a polisher while rotating at 1200 to 2000 r.pm.

By this polishing, the sponge buff marks are erased, the buff marks hardly remain, and the gloss effect is large and sufficient gloss is obtained.

According to the above polishing method, the paper marks and buff marks generated in each step are surely extinguished by polishing in the next step, and finally, the buff marks are almost eliminated and the surface property excellent in glossiness is obtained. And after polishing, it doesn't cloud white and has excellent durability.

In the above embodiment, the steps 1 to 5 were performed sequentially. This is a polishing method performed when the buff marks after the step (3) are not relatively fine.

In the case where the buff marks after the step (3) are relatively fine, polishing can be completed by performing the step (5) after the step (3) without performing the step (4).

It is also possible to use the auxiliary holder 11 shown in Fig. 3 as the holder for the sandpaper. This holder (11) uses a rectangular solid-shaped hard material (12), and installs a velvet fastener (14) on both walls of the hard material (12) by bonding to fix the sandpaper (15). will be. According to this holding tool 11, a minute site | part or a narrow part can be easily grind | polished.

As described above, according to the present invention, the metal coating surface is sequentially polished by the steps (1) to (5) shown below, or sequentially polished by the steps (1) to (3) (4). Since the polishing is performed by performing the process of (5) without performing the process of (), there is an effect that a buff mark is reliably erased, and a polishing surface having excellent gloss and excellent durability is obtained.

(1) water polishing with sandpaper, (2) grinding with a wool buff retaining a fine compound, and (3) coarse holding a compound having the same roughness as the compound used in the step (2). Grinding with a sponge buff, (4) Grinding with a sponge buff having the same roughness as that of the sponge buff of (3), and keeping a very fine compound, and (5) Sponge of a fine eye holding an ultra-fine particle compound Polish with a buff.

Claims (2)

A method of polishing a metal coated surface, characterized in that the metal coated surface is sequentially polished by the steps (1) to (4): (1) Wolfuff polished with water by sandpaper, and (2) maintaining a fine compound. Polishing with (3) a coarse sponge buff holding a compound having the same roughness as the compound used in the process of (2) above, and (4) a fine snow sponge buff holding a compound of ultrafine particles. Polish A method of polishing a metal coated surface, the method comprising (1) to (5) to sequentially polish the metal coated surface: (1) by buffing sand with sand paper and (2) maintaining a fine compound Polishing, (3) polishing with a rough sponge buff holding a compound having the same roughness as the combound used in the step (2); and (4) roughness similar to the sponge buff of (3). It is polished with a sponge buff having a very fine compound, and (5) with a fine snow sponge buff with a compound of ultrafine particles.

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