KR20150068689A - Sulface treating method of die casting product - Google Patents

Sulface treating method of die casting product Download PDF

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KR20150068689A
KR20150068689A KR1020130154641A KR20130154641A KR20150068689A KR 20150068689 A KR20150068689 A KR 20150068689A KR 1020130154641 A KR1020130154641 A KR 1020130154641A KR 20130154641 A KR20130154641 A KR 20130154641A KR 20150068689 A KR20150068689 A KR 20150068689A
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vapor deposition
synthetic resin
metal
film
deposition film
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KR101547240B1 (en
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양용섭
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(주)파버나인
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer

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  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
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  • Mechanical Engineering (AREA)
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  • Moulds For Moulding Plastics Or The Like (AREA)
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Abstract

The present invention relates to a new surface treatment method of a die casting molded object capable of environment-friendly manufacturing a product having esthetically superior outer appearance and excellent durability. The present invention comprises the processes of: deburring a molded product (2) molded by die casting; polishing the surface of the molded product (2); coating a synthetic resin on the surface of the molded product (2) to form a synthetic resin coating film (10); a depositing a metal to the synthetic resin coating film (10) by a physical deposition method to form a metal deposition film (20); and depositing silica on the metal deposition film (20) by the physical deposition method to form a silica deposition film (30).

Description

다이캐스팅 성형품의 표면처리방법{Sulface treating method of die casting product}TECHNICAL FIELD [0001] The present invention relates to a method of treating a die-

본 발명은 다이캐스팅 성형품의 표면처리방법에 관한 것으로서, 보다 상세하게는 외관이 미려하고 내구성도 우수한 제품을 환경친화적으로 제조할 수 있는 다이캐스팅 성형품의 새로운 표면처리방법에 관한 것이다.
More particularly, the present invention relates to a new surface treatment method for a die-casting molded article which can produce environmentally friendly products having excellent appearance and excellent durability.

다이캐스팅 성형품은 치수가 정확하고, 기계적 특성이 우수하다는 특징을 가진다. 따라서 항공기나 자동차관련 부품과 더불어 전기, 전자 분야의 내외장재 부품으로 널리 사용되고 있다. 특히, 최근에는 휴대폰, 태블릿 PC 등과 같은 모바일 전자기기의 프레임과 더불어 LCD나 LED TV 등의 프레임에도 다이캐스팅 성형품이 많이 사용되고 있다.Die casting moldings are characterized by their dimensional accuracy and excellent mechanical properties. Therefore, it is widely used as interior and exterior parts of electric and electronic fields in addition to aircraft and automobile related parts. Particularly, in recent years, diecasting molded articles are widely used in frames of LCDs and LED TVs as well as frames of mobile electronic devices such as mobile phones and tablet PCs.

일반적으로 다이캐스팅 성형품의 제조에는 마그네슘합금, 알루미늄합금 등의 소재가 주로 사용되고 있는데, 다이캐스팅 과정에서 유입된 공기에 의해 소재 내부 및 표면에 수많은 미세 기공이 존재하게 된다. Generally, materials such as magnesium alloys and aluminum alloys are mainly used for the production of die casting products. Numerous micropores exist in the inside and the surface of the material due to the air introduced in the die casting process.

한편, 다이캐스팅 성형품은 그 용도에 따라 다양한 외장성, 내마모성, 내식성 등의 표면 물성을 요구한다. 따라서 요구되는 물성을 충족시키기 위해 다이캐스팅 성형품의 표면에 적절한 표면처리가 실시되고 있는데, 흔히, 다이캐스팅 성형의 표면을 연마하여 표면에 기공을 제거한 후에 도금을 한다.On the other hand, die casting molded products require surface properties such as various exterior properties, abrasion resistance, and corrosion resistance depending on the use thereof. Therefore, in order to meet the required physical properties, the surface of the die-cast molding is subjected to an appropriate surface treatment. In many cases, the surface of the die casting is polished to remove the pores on the surface, and then the surface is plated.

그러나 성형품의 표면에 형성된 기공을 제거하기 위해 성형품의 표면을 반복적으로 연마하기는 하지만, 연마만으로는 표면 기공이 제대로 제거되지 못하며, 따라서 도금시에 도금불량이 발생되었다. 또한, 습식방법으로 도금을 하였기 때문에, 도금시 발생되는 폐액에 의해 환경오염도 유발되었다. However, although the surface of the molded article is repeatedly polished to remove the pores formed on the surface of the molded article, the surface pores can not be properly removed by polishing alone, and plating defects are generated at the time of plating. Further, since the plating was performed by the wet method, environmental pollution was also caused by the waste liquid generated during plating.

뿐만 아니라 이러한 종래 방법으로 표면처리된 제품은 도금층이 제품의 외측면을 형성하기 때문에, 제품 사용 중에 도금층에 스크랫치가 발생되거나 도금층이 변색되는 경우가 발생되었다.
In addition, since the plating layer forms the outer surface of the product, there is a case where scratches are generated in the plating layer or the plating layer is discolored during use of the product.

대한민국 등록특허 제10-1016278호(2011.02.14.)Korean Patent No. 10-1016278 (Feb. 14, 2011)

본 발명은 상기의 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 다이캐스팅 성형품의 표면 불균일이 해소되어 외관이 미려할 뿐만 아니라 내구성도 우수한 제품을 환경친화적으로 제조할 수 있는 새로운 다이캐스팅 성형품의 표면처리방법을 제공하는 것이다.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a surface treatment method of a new die-casting molded article in which a surface irregularity of a die- .

본 발명의 일 특징에 따르면, 다이캐스팅으로 성형된 성형품(2)을 디버링하는 과정과, 상기 성형품(2)의 표면을 폴리싱하는 과정과, 상기 성형품(2)의 표면에 합성수지를 코팅하여 합성수지코팅막(10)을 형성하는 과정과, 상기 합성수지코팅막(10)에 금속을 물리적증착방법으로 증착하여 금속증착막(20)을 형성하는 과정과, 상기 금속증착막(20) 위에 실리카를 물리적증착방법으로 증착하여 실리카증착막(30)을 형성하는 과정을 포함하여 이루어진 것을 특징으로 하는 다이캐스팅 성형품의 표면처리방법이 제공된다.
According to an aspect of the present invention, there is provided a method of manufacturing a molded product, comprising the steps of: deburring a molded article molded by die casting; polishing a surface of the molded article; coating synthetic resin on a surface of the molded article to form a synthetic resin coating film Forming a metal deposition layer 20 by depositing metal on the synthetic resin coating layer 10 by physical vapor deposition; depositing silica on the metal deposition layer 20 by physical vapor deposition to form silica And forming a vapor deposition film (30) on the surface of the die-casting molded article.

이상과 같은 구성을 가지는 본 발명은 이상과 같은 구성을 가지는 성형품의 표면에 합성수지코팅막(10)을 형성하여, 성형품의 표면에 존재하는 기공을 메운 다음, 금속증착막(20)과 실리카증착막(30)을 형성함으로써, 표면이 매끄러운 미려한 제품을 생산할 수 있을 뿐만 아니라, 금속증착막(20)과 실리카증착막(30)의 형성과정에서 제품불량율도 저하된다.In the present invention having the above-described structure, the synthetic resin coating film 10 is formed on the surface of the molded article having the above-described structure to fill the pores present on the surface of the molded article, and then the metal vapor deposition film 20 and the silica vapor deposition film 30 It is possible not only to produce a product having a smooth surface but also to reduce the product defect rate in the process of forming the metal vapor deposition film 20 and the silica vapor deposition film 30. [

또한, 습식도금방법을 사용하지 않고 금속을 물리적증착방법으로 증착하여 금속증착막(20)을 형성하고, 실리카도 유기용제를 사용하여 코팅하지 않고 물리적증착방법으로 증착하기 때문에, 환경친화적이다.Further, since the metal deposition film 20 is formed by depositing a metal by a physical vapor deposition method without using a wet plating method, and silica is also deposited by physical vapor deposition method without coating with an organic solvent, it is environmentally friendly.

뿐만 아니라, 금속증착막(20)이 실리카증착막(30)에 의해 커버되어 외부로 노출되지 않으므로, 금속증착막(20)이 변색되는 것이 방지되며, 실리카증착막(30)의 경도가 높기 때문에, 제품에 스크랫치가 발생되는 것도 방지되는 등 실리카증착막(30)에 의해 제품의 내구성이 향상된다. In addition, since the metal vapor deposition film 20 is covered with the silica vapor deposition film 30 and is not exposed to the outside, the metal vapor deposition film 20 is prevented from discoloring and the hardness of the silica vapor deposition film 30 is high, The durability of the product is improved by the silica vapor deposition film 30, for example, the generation of the lattice is prevented.

도 1은 본 발명의 일 실시예에 따른 제조공정도
도 2는 본 발명에 의해 제조된 성형품의 표면 확대단면도
1 is a schematic view showing a manufacturing process according to an embodiment of the present invention
Fig. 2 is an enlarged cross-sectional view of the surface of the molded article produced by the present invention

이하에서 도면을 참조하여 본 발명의 바람직한 실시예를 설명한다.Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

도 1은 본 발명의 제조공정을 보인 공정도이고, 도 2는 본 발명에 의해 제조된 제품의 표면을 보인 확대단면도이다. 본 발명은 다이캐스팅 성형품의 표면처리방법으로서, 다음과 같이 이루어진다. FIG. 1 is a process diagram showing the manufacturing process of the present invention, and FIG. 2 is an enlarged sectional view showing the surface of the product manufactured by the present invention. The present invention is a method for surface treatment of a die-cast molded article, as follows.

1) 디버링과정1) Deburring process

다이캐스팅으로 성형된 성형품(2)에 잔존되는 버(burr)를 제거한다. 이 과정은 연마에 의해 이루어진다.
The burrs remaining in the molded article 2 molded by die casting are removed. This process is done by polishing.

2) 표면폴리싱과정2) Surface polishing process

상기 과정에서 버가 제거된 성형품(2)의 표면을 폴리싱하여 표면을 매끄럽게 정리한다. 이러한 폴리싱과정은 #180 정도의 샌드페이퍼로 표면을 연마하여 이루어지는데, 이러한 폴리싱과정에 의해 성형품의 표면에 형성된 산화물, 이물질 등이 제거된다.
In the above process, the surface of the molded article 2 from which burrs are removed is polished to smoothly gather the surface. This polishing process is performed by polishing the surface with sandpaper # 180 or so. Oxide, foreign matter, etc. formed on the surface of the product are removed by the polishing process.

3) 합성수지코팅과정3) Synthetic resin coating process

본 과정에서는 표면이 폴리싱처리된 성형품(2)의 표면에 합성수지를 코팅하여 합성수지코팅막(10)을 형성하는데, 합성수지를 용제에 용해시킨 용액을 스프레이방법으로 코팅하고 경화시켜 합성수지코팅막을 형성한다. 이러한 합성수지코팅막(10)은 수십 ㎛ 정도의 두께로 형성한다.In this process, a synthetic resin coating film 10 is formed by coating synthetic resin on the surface of the surface-polished molded product 2. A solution in which a synthetic resin is dissolved in a solvent is coated by a spraying method and cured to form a synthetic resin coating film. The synthetic resin coating film 10 is formed to a thickness of several tens of micrometers.

본 과정에서 사용가능한 수지가 특별히 한정되는 것은 아니나, 에폭시수지, 페놀수지, 아크릴수지, 우레탄수지, 폴리에스테르수지 등이 사용된다. An epoxy resin, a phenol resin, an acrylic resin, a urethane resin, a polyester resin, or the like is used, though the resin usable in the present process is not particularly limited.

이와 같이 성형품의 표면에 합성수지를 코팅하면, 합성수지가 성형품 표면의 기공에 충진되어 성형품의 표면이 매끄러운 표면을 가지게 된다. When synthetic resin is coated on the surface of the molded article in this way, the synthetic resin is filled in the pores on the surface of the molded article, so that the surface of the molded article has a smooth surface.

4) 금속증착과정4) Metal deposition process

합성수지코팅막(10)이 형성된 성형품의 표면에 금속을 증착하여 금속증착막(20)을 형성한다. 이 과정은 물리적증착방법(PVD)으로 행해진다. 금속증착막(20) 역시 수십 ㎛ 정도의 두께로 형성한다.A metal vapor deposition film 20 is formed by depositing a metal on the surface of the molded product on which the synthetic resin coating film 10 is formed. This process is done by physical vapor deposition (PVD). The metal vapor deposition film 20 is also formed to a thickness of several tens of micrometers.

성형품을 습식도금으로 도금하면 도금시 발생되는 폐수에 의해 환경오염이 유발되므로, 본 발명에서는 습식도금을 하지 않고 물리적증착방법으로 금속을 증착시킨다. 물리적증착방법으로는 스퍼터링, 이온플레이팅 등의 방법이 있는데, 작업환경에 따라 적절한 방법이 사용된다. If the molded product is plated by wet plating, environmental pollution is caused by the wastewater generated during plating. Therefore, in the present invention, the metal is deposited by the physical vapor deposition method without wet plating. Physical vapor deposition methods include sputtering, ion plating, and the like. Appropriate methods are used depending on the working environment.

본 과정에서 형성되는 금속증착막(20)에 의해 성형품에 금속성 표면이 제공되며, 성형품의 내식성과 장식성이 향상된다. 사용되는 금속의 종류가 특별히 제한되지 않으며, 티타늄이나 크롬 등 다양한 금속이 사용가능하다. The metal vapor deposition film 20 formed in the present process provides a metallic surface to the molded article and improves the corrosion resistance and decorative property of the molded article. The kind of the metal to be used is not particularly limited, and various metals such as titanium and chromium can be used.

5) 실리카증착과정5) Silica deposition process

상기 과정에서 형성된 금속증착막(20) 위에 실리카를 물리적증착방법(PVD)으로 증착하여, 수십 ㎛ 정도의 두께를 갖는 실리카증착막(30)을 형성한다. Silica is deposited on the metal vapor deposition film 20 formed by the above process by physical vapor deposition (PVD) to form a silica vapor deposition film 30 having a thickness of several tens of micrometers.

본 과정에서 형성되는 실리카증착막(30)은 성형품의 최외각을 형성하는데, 실리카증착막(30)에 금속증착막(20)이 보호된다. 실리카증착막(30)은 실리카에 의해 고경도를 가지기 때문에 스크랫치가 잘 발생되지 않으며, 실리카증착막(30)에 의해 금속증착막(20)의 변색도 방지된다. The silica vapor deposition film 30 formed in this process forms the outermost angle of the molded product, and the vapor deposited metal film 20 is protected by the silica vapor deposition film 30. Since the silica vapor deposition film 30 has a high hardness due to silica, scratches are not easily generated, and discoloration of the metal vapor deposition film 20 is also prevented by the silica vapor deposition film 30.

Claims (1)

다이캐스팅으로 성형된 성형품(2)을 디버링하는 과정;
상기 성형품(2)의 표면을 폴리싱하는 과정;
상기 성형품(2)의 표면에 합성수지를 코팅하여 합성수지코팅막(10)을 형성하는 과정;
상기 합성수지코팅막(10)에 금속을 물리적증착방법으로 증착하여 금속증착막(20)을 형성하는 과정; 및
상기 금속증착막(20) 위에 실리카를 물리적증착방법으로 증착하여 실리카증착막(30)을 형성하는 과정;을 포함하여 이루어진 것을 특징으로 하는 다이캐스팅 성형품의 표면처리방법. A step of deburring the molded article 2 molded by die casting;
Polishing the surface of the molded product (2);
Coating a surface of the molded product (2) with a synthetic resin to form a synthetic resin coating film (10);
Depositing a metal on the synthetic resin coating film 10 by physical vapor deposition to form a metal vapor deposition film 20; And
And depositing silica on the metal vapor deposition film (20) by a physical vapor deposition method to form a silica vapor deposition film (30).
KR1020130154641A 2013-12-12 2013-12-12 Sulface treating method of die casting product KR101547240B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108103505A (en) * 2017-12-22 2018-06-01 余姚市震达精工机械有限公司 A kind of PVD/CVD/PCVD Coating Processes for improving cold heading die
IT202000008161A1 (en) * 2020-04-17 2021-10-17 Luigi Scatragli Process of making metal accessories, and metal accessories made in this way.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108103505A (en) * 2017-12-22 2018-06-01 余姚市震达精工机械有限公司 A kind of PVD/CVD/PCVD Coating Processes for improving cold heading die
IT202000008161A1 (en) * 2020-04-17 2021-10-17 Luigi Scatragli Process of making metal accessories, and metal accessories made in this way.

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