KR101853302B1 - Manufacturing method of automotive door step with pvd coating - Google Patents

Abstract

The present invention relates to a method of manufacturing an automotive door step with PVD coating. More specifically, the method of manufacturing an automotive door step with PVD coating is able to conduct etching on a metal plate with a PVD coating layer formed thereon, and thus, the color and wear resistance of the PVD coating layer are maintained, and a variety of patterns can be formed through etching. The method of manufacturing an automotive door step with PVD coating comprises: a cleaning step; a dry film coating step; a PSR ink layer forming step; a developed film attachment step; an exposing step; a development step; a sandblast step; an etching step; a peeling step; and a press step.

Description

TECHNICAL FIELD [0001] The present invention relates to a manufacturing method of a door step for a vehicle to which a PVD coating is applied,

The present invention relates to a method of manufacturing a door step for a vehicle to which a PVD coating is applied, and more particularly, to a method for manufacturing a door step for a vehicle, which can etch a metal plate on which a PVD coating layer is formed, The present invention relates to a method of manufacturing a door step for a vehicle to which a PVD coating is applied.

Generally, the door step is formed in a plate shape, and is formed to be attached to a lower end of a frame in which a door is received in a vehicle, so that a passenger can walk.

These door steps are patterned to match the design of the vehicle, and the vehicle manufacturers' names are mainly displayed on the upper surface.

FIG. 1 is a perspective view showing a door step in which a PVD coating layer is formed according to the background art, and a method of manufacturing a door step according to the background art will be described.

A cleaning step of removing contaminants adhered to the metal plate after the metal plate is provided.

Next, a dry film coating step of coating a dry film on the upper surface of the metal plate is performed.

Next, a developing film adhering step for adhering a developing film printed with a pattern on the upper surface of the dry film is performed.

Next, an exposure step for irradiating ultraviolet light is performed on the top of the developing film. Through the exposure step, a portion of the developer film that has passed through ultraviolet rays is cured, and a portion where the ultraviolet rays are blocked by the opaque portion of the developer film is not cured.

Next, the developing film is peeled off and the metal plate is immersed in the developing solution to cause a development step of leaving only the uncured portion dissolved and leaving and the hardened portion remaining.

Next, an etching step is performed in which the pattern is displayed because the portion other than the cured dry film is etched by spraying the etching solution above the metal plate.

Next, the metal plate is washed to remove the etchant, and then a press step is performed to cut the rim to obtain the shape of the door step of the automobile through the press.

However, since the vehicle doorstep manufactured in this way is subject to scratches due to frequent friction since the occupant steps on his / her feet when getting on and off, the appearance of the doorstep is disadvantageous. In addition, since it is impossible to produce a color image, there is a problem that the design is limited.

1, a PVD (Physical Vapor Deposition) coating layer 20 for depositing titanium (Ti) or chromium (Cr) is formed on the upper surface of the metal plate 10 to prevent occurrence of scratches, It is possible to manufacture the doorstep 1 for a vehicle which can produce black or gold color of the vehicle.

However, in the case of the PVD coating, there is a problem that the abrasion resistance is excellent enough to prevent scratching, but the etching is impossible. Therefore, there is a problem that the mutual or logos of the vehicle manufacturers can not be expressed.

In order to solve such a problem, a method of forming a PVD (Physical Vapor Deposition) coating layer 20 in which a pattern is etched on the metal plate 10 and then titanium (Ti) or chromium (Cr) is deposited is proposed. However, in this case, there is a problem that the production is delayed and the manufacturing cost becomes high because the deposition process is performed while a single sheet metal 10 is put into the sputter system and taken out by the operator. In addition, since the color tone density of the PVD coating layer 20 is non-uniform and is deposited to an etched pattern, the pattern is not properly displayed.

(Document 1) Korean Patent Registration No. 10-0676402 (Jan. 24, 2007) (Document 2) Korean Design Registration No. 30-0651830 (July 05, 2012)

A manufacturing method of a door step for a vehicle to which the PVD coating according to the present invention is applied aims to solve the following problems.

In the case of the PVD coating, an attempt is made to solve the problem that the abrasion resistance is excellent enough to prevent scratches, but the etching is impossible. Therefore, it is intended to solve the problem that the mutual or logo of the vehicle manufacturer can not be expressed.

In addition, as a process of forming a PVD coating layer after etching a pattern, an evaporation process is performed while a worker inserts and withdraws a single sheet of metal into a roll rolls putter system, thereby eliminating the problem that production is delayed and manufacturing cost becomes high I want to.

Also, the problem is that the color tone of the PVD coating layer is non-uniform and the pattern is not properly expressed because it is deposited to the etched pattern.

A manufacturing method of a door step for a vehicle to which a PVD coating according to the present invention is applied is as follows in order to solve the above problems.

A cleaning step of removing a contaminant adhering to the metal plate after the metal plate having the PVD coating layer formed on the upper surface of the stainless steel plate and the dry film coating step of coating the dry film on the upper surface of the PVD coating layer after the cleaning step, A PSR ink layer formation step of forming a PSR ink layer by applying a PSR ink on the upper surface of the dry film after the dry film coating step and drying the PSR ink layer; An exposure step of irradiating ultraviolet light at an upper portion of the developing film after the developing film adhering step and a developing step of removing the developing film after the exposing step, Is immersed in a developing solution to dissolve the PSR ink layer and the non-cured portion of the dry film to form an exposed portion A sandblasting step of exposing the stainless steel plate by removing the PVD coating layer of the exposed part by spraying sand at an upper portion of the PSR ink layer after the development step; A step of removing the cured PSR ink layer and the dry film after the etching step; a step of removing the cured PSR ink layer and the dry film after the etching step; And a pressing step of cutting the metal plate by a press machine after the peeling step.

The manufacturing method of a door step for a vehicle to which the PVD coating according to the present invention is applied can exhibit the following effects.

First, according to the manufacturing process of the present invention, a pattern can be etched on a metal plate on which a PVD coating layer is formed. Accordingly, scratches can be prevented from occurring due to the abrasion resistance of the PVD coating layer, and it is possible to produce various colors of black or gold color tone developed due to the PVD coating layer, It can be etched.

Secondly, the present invention relates to a method of forming a PVD coating layer on which titanium or chromium is deposited on an upper surface thereof, so that the stainless steel plate is rolled through the rolling rolls putter system continuously without taking the deposition process after the etching as in the background art An etching process can be performed on the upper surface of the metal plate . Therefore, it is possible to perform a quick operation by lowering the manufacturing cost as compared with the background technology by aiming at a discontinuous operation in which a worker inserts the metal plate into the sputter system and then takes it out. Further, since the vapor deposition process is continuously performed, it is possible to produce a door step for a vehicle having uniform color tone.

According to the above effects, the present invention can improve the productivity because the vehicle door step with improved function and design can be manufactured at a lower cost than the background technology at a lower cost.

1 is a perspective view showing a door step in which a PVD coating layer is formed according to the background art;
2 is a block diagram illustrating a method of manufacturing a door step for a vehicle to which a PVD coating according to the present invention is applied.
3 is a perspective view illustrating a dry film coating step and a PSR ink layer forming step in a method of manufacturing a door step for a vehicle to which the PVD coating according to the present invention is applied.
4 is a perspective view showing a step of adhering a developing film and an exposing step in a method of manufacturing a door step for a vehicle to which a PVD coating according to the present invention is applied.
5 is a perspective view illustrating a developing step in a method of manufacturing a door step for a vehicle to which a PVD coating according to the present invention is applied.
6 is a perspective view showing a step of sand blasting in a method of manufacturing a door step for a vehicle to which a PVD coating according to the present invention is applied.
7 is a perspective view showing an etching step, a peeling step and a pressing step in a manufacturing method of a door step for a vehicle to which the PVD coating according to the present invention is applied.
8 is a graph showing the reason why a dry film is formed in a manufacturing method of a door step for a vehicle to which a PVD coating according to the present invention is applied. When a PSR ink layer is directly formed on a PVD coating layer, One process.
FIG. 9 is a process diagram sequentially illustrating steps from an exposure step to an etching step in a manufacturing method of a door step for a vehicle to which the PVD coating according to the present invention is applied.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating a method of manufacturing a door step for a vehicle to which a PVD coating according to the present invention is applied. FIG. 3 is a cross- FIG. 4 is a perspective view showing a developing film adhering step and an exposing step in a manufacturing method of a door step for a vehicle to which a PVD coating according to the present invention is applied, FIG. 5 is a perspective view showing a door step FIG. 6 is a perspective view showing a sandblasting step in a method of manufacturing a door step for a vehicle to which a PVD coating according to the present invention is applied, FIG. 7 is a perspective view showing a door for a vehicle to which the PVD coating according to the present invention is applied FIG. 8 is a perspective view showing an etching step, a peeling step and a pressing step in the manufacturing method of the step, FIG. 8 is a perspective view showing a door step of the vehicle to which the PVD coating according to the present invention is applied FIG. 9 is a view showing the process sequence from the exposure step to the etching step when the PSR ink layer is directly formed in the PVD coating layer in order to explain why the dry film is formed in the manufacturing method. The process steps from the exposure step to the etching step are sequentially described in the manufacturing method of the door step for a vehicle.

Since the pattern 170 is etched on the upper surface of the metal plate 110 on which the PVD coating layer 113 is formed by etching the pattern 170 by using the PVD coating according to the present invention, ) Can be produced.

For this purpose, the manufacturing process is performed as follows.

Since chromium (Cr) or titanium (Ti) is deposited on the upper surface of the stainless steel plate 111, the metal plate 110 having the PVD (Physical Vapor Deposition) coating layer 113 is provided, A cleaning step S1 is carried out.

After the cleaning step S1, a dry film coating step S2 for coating the dry film 130 on the upper surface of the PVD coating layer 113 is performed.

A PSR (Photo Solder Resist) ink layer forming step (S3) for forming a PSR ink layer 140 by applying a PSR ink onto the upper surface of the dry film 130 after the dry film coating step S2, .

After the PSR ink layer forming step (S3), a developing film adhering step (S4) is carried out in which the developing film (150) is brought into close contact with the upper surface of the PSR ink layer (140).

After the developing film adhesion step (S4), an exposure step (S5) is performed in which ultraviolet light is irradiated on the top of the developing film (150).

After the exposure step S5, the development film 150 is peeled off and the metal plate 110 is immersed in a developing solution so that the PSR ink layer 140 and the non-cured portions M and N of the dry film 130, A developing step S6 for forming the exposed portion 160 is performed.

After the developing step S6, the PVD coating layer 113 of the exposed portion 160 is removed by spraying the sand 190 on the PSR ink layer 140 to expose the stainless steel plate 111 A sandblasting step S7 is performed.

An etchant is sprayed onto the PSR ink layer 140 after the sandblasting step S7 to etch the pattern 170 on the upper surface of the stainless steel plate 111 exposed on the exposed portion 160 Step S8 is performed.

After the etching step S8, a peeling step S9 for removing the cured PSR ink layer 140 and the dry film 130 is performed.

After the peeling step (S9), a press step (S10) is performed in which the metal plate (110) is cut by a press machine.

A more detailed embodiment of each step will be described as follows.

1. Cleaning step (S1)

3, a metal plate 110 having a PVD coating layer 113 of 0.001 mm to 0.003 mm formed on the top surface of a stainless steel plate 111 having a thickness of 0.6 mm to 1 mm is provided. The metal plate 110 includes a stainless steel plate 111 ) Is taken out and continuously passed through the roll-to-roll putter system so as to be rolled again, so that the PVD coating layer 113 on which titanium or chromium is vapor-deposited is cut.

Water is sprayed onto the PVD coating layer 113 of the metal plate 110 to remove solid matter such as dust. Then spray a thinner to remove the oil. Next, the water is sprayed again to remove the remaining foreign matter, and hot air at 60 to 100 DEG C is sprayed to dry the water. Therefore, the coating of the dry film 130 can be facilitated. If foreign substances such as oil or dust are present on the upper surface of the PVD coating layer 113, the coating of the dry film 130 can not be performed, and the subsequent process can not be performed.

2. Dry film coating step (S2)

As shown in FIG. 3, the dry film 130 is a film having a thickness of 0.03 mm to 0.04 mm, and is generally hardened when ultraviolet rays are received. If the hot plate (plate on which the heater is mounted) of 100 ° C. to 130 ° C. is pressed at a pressure of 0.5 kgf / cm 2 to 1.5 kgf / cm 2 while the dry film 130 is placed on the upper surface of the PVD coating layer 113, The dry film 130 is coated on the upper surface of the PVD coating layer 113 while being fused.

3. PSR ink layer formation step (S3)

The PSR ink is coated on the substrate for insulation purposes and has a hardness higher than that of the dry film 130 when solidified. Therefore, it is possible to prevent the dry film 130 from being damaged in the sandblasting step S7. After the PSR ink is applied or sprayed with a brush, the PSR ink layer 140 is formed as shown in FIG. 3 by blowing hot air at 90 to 100 DEG C for 5 to 10 minutes. At this time, the thickness of the PSR ink layer 140 is set to 0.01 mm to 0.03 mm as an example.

4. In the developing film adhering step (S4)

As shown in FIG. 4, the development film 150 is printed on the transparent portion 151 with the pattern 170 as an opaque portion 153, and is placed on the upper surface of the PSR ink layer 140. The pattern 170 is, for example, a logo or the like of a vehicle manufacturer.

5. In the exposure step S5,

So that ultraviolet light having a wavelength range of 100 nm to 280 nm is irradiated above the development film 150 for 5 minutes to 10 minutes. Therefore, as shown in FIG. 4, the PSR ink layer 140 and the dry film 130 corresponding to the transparent portion 151 of the development film 150 are cured because ultraviolet rays are transmitted. At this time, ultraviolet rays are transmitted through the PSR ink layer 140 and cured to the dry film 130. The regions of the PSR ink layer 140 and the dry film 130 corresponding to the opaque portions 153 are not cured because ultraviolet rays are blocked.

6. Development step (S6)

As the developer, for example, an aqueous solution containing 2% to 5% of soda ash can be used. The metal plate 110, from which the development film 150 is removed, is immersed in the developer for 30 minutes to 40 minutes. 5, the regions of the PSR ink layer 140 and the dry film 130, which have not been changed, are dissolved and removed, thereby forming the exposed portion 160 where the PVD coating layer 113 is exposed. The exposed portion 160 corresponds to the pattern 170.

However, the PSR ink layer 140 is solidified in the above-described exposure step (S5) and shrunk as it hardens. 9, a gap G is formed between the uncured portion M and the cured PSR ink layer 140 in the PSR ink layer 140. As shown in Fig. However, even if the dry film 130 is subjected to the exposure step S5, no shrinkage occurs. Therefore, no gap is formed between the uncured portion N and the cured dry film 130.

Accordingly, when the development step S6 is performed in this state, the width of the exposed portion 161 corresponding to the dry film 130 in the exposed portion 160 is greater than the width V1 of the exposed portion 161 in the exposed portion 160 corresponding to the PSR ink layer 140 The width V2 of the opening 163 becomes large, and the dry film 130 is exposed. When the sandblasting step S7 is performed in this state, the width V1 of the exposed portion 161 corresponding to the dry film 130 becomes large. When the etching step S8 is performed, The pattern 170 is formed to cause defects. The width V1 of the exposed portion 161 is equal to the dimension of the prescribed width.

9, the PSR ink K is coated on the inner side surface 165 of the exposed portion 163 corresponding to the PSR ink layer 140 with a brush and solidified to cover the exposed dry film 130 . In this state, even if the sandblasting step S7 is performed, the inner side surface 162 of the dry film 130 can be prevented from being damaged and expanded.

Hereinafter, the reason why the dry film 130 and the PSR ink layer 140 are sequentially disposed will be described.

8, when the PSR ink layer 140 is directly formed on the upper surface of the PVD coating layer 113, the development step S6 is performed so that the uncured portion M and the cured PSR ink layer A gap G is generated between the first and second electrodes 140 and 140. This is a phenomenon that occurs because the PSR ink layer 140 contracts while solidifying in the exposure step S5. Therefore, if the sandblasting step S7 and the etching step S8 are performed in this state, a width V1 is formed which is wider than the prescribed width V, resulting in a defect.

If the dry film 130 is used instead of the PSR ink layer 140 in order to prevent such a phenomenon, the exposed portion 161 having the width V specified in the etching step S8 can be obtained. However, 130 are cut and erased in the sandblasting step S7, so that the PSR ink layer 140 which can withstand the sandblast is required.

7. Sand blast step (S7)

6, the sand 190 is sprayed from the upper part of the PSR ink layer 140 to remove the PVD coating layer 113 of the exposed part 160 to expose the stainless steel plate 111, ). At this time, since the PSR ink layer 140 has a hardness higher than that of the dry film 130, the dry film 130 is prevented from being damaged by the sand 190 being sprayed . Therefore, the exposed portion 160 maintains the shape of the pattern 170. At this time, the sand 190 is used as a goldsmith with a mesh size of 200 mesh to 300 mesh and an injection pressure of 0.5 kgf / cm 2 to 2.5 kgf / cm 2.

However, if the sand 190 is uniformly sprayed, the surface of the stainless steel plate 111 may be excessively cut, resulting in piercing in the subsequent etching step S8. Therefore, after 90% of the PVD coating layer 113 is removed Cm2 to 2.5 kgf / cm < 2 > by using the mixture of the sand 190 and charcoal powder of 300 mesh to 350 mesh in a ratio of 1: 2. At this time, since the charcoal powder particles have a hardness lower than that of the sand (190) and reduce the density of the sand 190 to be sprayed , the removal of the remaining PVD coating layer 113 and the cutting of the stainless steel plate 111 can be prevented . It is a matter of course that the mixing ratio of the sand 190 and the char powder may be variable according to need.

8. Etching step (S8)

An etchant prepared by mixing 60% of water and 30% of hydrogen peroxide in 10% ferric chloride is sprayed onto the exposed portion 160 so that the pattern 170 is etched.

9. Peeling step (S9)

As shown in FIG. 7, the PSR ink layer 140 and the dry film 130 are peeled off by using a brush while spraying water.

10. Press step S10

As shown in FIG. 7, the rim of the metal plate 110 is cut so that the shape of the door step is formed. And the edges are smoothly finished using a grinder, so that it is possible to manufacture a door step 100 for a vehicle to which a PVD coating is applied.

As described above, according to the manufacturing process of the present invention, the pattern 170 can be etched on the metal plate 110 on which the PVD coating layer 113 is formed. Therefore, it is possible to prevent the occurrence of scratches due to the abrasion resistance of the PVD coating layer 113, and it is possible to produce various colors of black or gold color tone expressed by the PVD coating layer 113, Various patterns 170 such as a logo can be etched.

In addition, as in the background art of the present invention, since the stainless steel plate 111 is rolled after allowing the rolled stainless steel plate 111 to pass through the roll-to-roll putter system, the titanium stainless steel 111 is rolled again, The upper surface of the metal plate 110 on which the PVD coating layer 113 is formed can be etched . Therefore, it is possible to perform a quick operation by lowering the manufacturing cost as compared with the background technology, by aiming at a discontinuous operation in which a worker inserts the metal plate 110 into the sputter system and then takes it out. Further, since the vapor deposition process is continuously performed, it is possible to produce a door step for a vehicle having uniform color tone.

Since due to these features, can be quickly prepared, according to the present function and design an improved vehicle door step compared to the background art at a lower cost than the cost of the background art it is possible to improve the productivity.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but are intended to be illustrative, and thus the scope of the technical idea of the present invention is not limited by these embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

S1: Cleaning step S2: Dry film coating step
S3: PSR ink layer forming step S4: developing film adhesion step
S5: Exposure step S6: Developing step
S7: Sand blast step S8: Etching step
S9: Peeling step S10: Press step
100: vehicle door step 110 with PVD coating applied: metal plate
111: Stainless steel plate 113: PVD coating layer
130: dry film 140: PSR ink layer
150: developing film 151: transparent part
153: opaque portions 160, 161, 163: exposed portion
170: pattern 190: sand

Claims (1)

A cleaning step S1 of removing the contaminants adhering to the metal plate 110 after the metal plate 110 having the PVD coating layer 113 formed on the upper surface of the stainless steel plate 111,
A dry film coating step (S2) of coating a dry film (130) on the upper surface of the PVD coating layer (113 ) after the cleaning step (S1)
A PSR ink layer forming step S3 of forming a PSR ink layer 140 by applying a PSR ink onto the upper surface of the dry film 130 after the dry film coating step S2,
A developing film adhering step (S4) in which the developing film (150) is brought into close contact with the upper surface of the PSR ink layer (140) after the PSR ink layer forming step (S3)
An exposure step (S5) for irradiating ultraviolet light on the top of the development film (150) after the developing film adhesion step (S4)
After the exposure step S5, the development film 150 is peeled off and the metal plate 110 is immersed in a developing solution so that the PSR ink layer 140 and the non-cured portions M and N of the dry film 130, A developing step S6 of forming an exposed portion 160 since the conductive layer is dissolved and separated,
After the developing step S6, the PVD coating layer 113 of the exposed portion 160 is removed by spraying the sand 190 on the PSR ink layer 140 to expose the stainless steel plate 111 A sandblasting step S7,
An etchant is sprayed onto the PSR ink layer 140 after the sandblasting step S7 to etch the pattern 170 on the upper surface of the stainless steel plate 111 exposed on the exposed portion 160 Step S8,
A peeling step (S9) for removing the cured PSR ink layer (140) and the dry film (130) after the etching step (S8)
And a pressing step (S10) of cutting the rim of the metal plate (110) by a pressing machine after the peeling step (S9)
Coating the PSR ink on the inner edge 165 of the PSR ink layer 140 in the exposed portion 160 after the development in the developing step S6,
After the sand 190 is sprayed in the sandblasting step S7, the PVD coating layer 113 remaining on the surface of the stainless steel plate 111 is removed by spraying a mixture of the sand 190 and charcoal powder Wherein the PVD coating is applied to the door step.

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