KR100605569B1 - method of post treatment of mold injected product - Google Patents

Abstract

Provided is a method for post-treatment of an injection product. This method first applies a injection molding method to produce a plastic injection molding. A first coating layer is formed on the surface of the plastic injection molding. A metal layer is formed on the first coating layer. Next, the metal layer is selectively etched to form a metal layer pattern remaining on the first coating layer. Subsequently, a urethane coating layer is formed on the metal layer pattern and the first coating layer exposed by the laser etching. A second coating layer is formed on the urethane coating layer.

LCD protective panel, laser etching

Description

Method of post treatment of mold injected product

1 is a perspective view showing a liquid crystal protection panel of a post-processing wireless mobile communication terminal according to an embodiment of the present invention.

Figure 2 is a process chart showing a post-treatment method of a plastic injection molding according to an embodiment of the present invention.

3 to 6 are cross-sectional views taken along line I ′ of FIG. 1 to explain a post-treatment method of an LCD protective panel injection molded product according to an embodiment of the present invention.

* Description of the main parts of the drawing *

100: liquid crystal protective panel injection molding 102: the first coating layer

104: metal layer 104 ': metal layer pattern

106: urethane coating layer 108: second coating layer

112: lower paint layer 114: upper paint layer pattern

The present invention relates to a method for producing an injection product, and more particularly, to a post-treatment method for an injection product.

Plastics have advantages such as high formability, light weight, and relatively low manufacturing cost. Therefore, in manufacturing casing frames for various home appliances, plastics are used for weight reduction and miniaturization for improving portability. In general, the plastic molding is applied to the injection molding method that can be mass-produced at low cost.

Meanwhile, as the competition in the home appliance market is intensifying, appearance design plays an important role in promotion as well as functions unique to home appliances. In particular, the wireless mobile communication terminal, which is being actively developed in recent years among the home appliances, has decreased in terms of sales performance depending on the casing frame, in particular, the exterior design of the upper folder cover, in addition to the product-specific functions as the age group of the main consumers decreases. have. Therefore, in order to increase the consumer's purchase needs, the development of the exterior design in various ways is required to satisfy not only the functionality required for the casing frame but also the consumer's aesthetic desire.

In order to overcome the uniform plastic texture of the casing frame injection molded product produced by the injection molding method, methods of surface treatment of the outer surface through various processes, for example, painting, plating, and deposition, have been applied. Particularly, when a thin metal layer is formed on the surface of the casing frame injection molding through plating or deposition, the appearance of the casing frame injection molding can be beautiful by expressing not only the gloss of the metal but also the intrinsic color of the used metal material. . However, the above methods of forming a metal layer on the surface of the casing frame injection molding are typically limited in color by the intrinsic color of the metal used by forming a metal layer on the front surface of the casing frame injection molding, requiring a variety of color designs. It is difficult to meet consumer needs.

As an alternative to this, a patterned deposition mask is formed on the surface of the casing frame injection molding, and a metal layer pattern designed in a predetermined form is formed by selectively depositing a metal layer on the surface of the casing frame injection molding using the deposition mask as a metal deposition prevention film. Doing. However, when the metal layer pattern is formed by this method, the metal layer may be minutely formed on the surface of the casing frame injection part under the edge of the deposition mask during the metal deposition process. As a result, a problem may occur in that the outline of the metal layer pattern formed through the metal deposition process is not clear and spread.

The technical problem to be achieved by the present invention is to provide a post-processing method of an injection product that enables the appearance design of various forms on the surface of the injection product by forming a metal layer pattern having a clear outline on the surface of the injection product.

In order to achieve the above technical problem, the present invention provides a post-treatment method of an injection product. This method first applies a injection molding method to produce a plastic injection molding. A first coating layer is formed on the surface of the plastic injection molding. A metal layer is formed on the first coating layer. Next, the metal layer is selectively etched to form a metal layer pattern remaining on the first coating layer. A urethane coating layer is formed on the metal layer pattern and the first coating layer exposed by the laser etching. A second coating layer is formed on the urethane coating layer.

According to one embodiment of the present invention there is provided a post-treatment method for an LCD protective panel injection molded product of a wireless mobile communication terminal. In this method, first, an injection molding method is applied to produce a liquid crystal protection panel injection molded product, wherein the liquid crystal protection panel injection molded product is manufactured to have a liquid crystal display part and a body part defined by the liquid crystal display part. A first coating layer covering the front surface of the liquid crystal protective panel injection molding is formed. A metal layer is formed on the first coating layer, and the metal layer is selectively laser-etched to form a metal layer pattern remaining on the first coating layer. A urethane coating layer is formed on the metal layer pattern and the first coating layer exposed by the laser etching. A second coating layer is formed on the urethane coating layer.

Furthermore, according to an embodiment of the present invention, after forming the second coating layer, paint masks are formed to cover the front surface of the liquid crystal protection panel injection molding and the liquid crystal display part of the rear surface of the liquid crystal protection panel injection molding. The paint masks are used as anti-paint films to form a lower paint layer on the body portion of the rear surface of the liquid crystal protective panel injection molding. An upper paint layer is formed on the lower paint layer. The upper paint layer is selectively laser-etched to expose a predetermined region of the lower paint layer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed subject matter is thorough and complete, and that the scope of the invention to those skilled in the art will fully convey. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Like numbers refer to like elements throughout.

1 is a perspective view showing a liquid crystal protection panel of a post-processing wireless mobile communication terminal according to an embodiment of the present invention.

Referring to FIG. 1, a liquid crystal protection panel 10 (hereinafter, referred to as a liquid crystal protection panel) of a wireless mobile communication terminal provided by an embodiment of the present invention is, for example, a wireless mobile communication terminal having dual liquid crystals. In the upper folder cover frame 20 is fastened to constitute the upper folder cover 30 of the wireless mobile communication terminal.

As illustrated in FIG. 1, the LCD protective panel 10 post-processed by an embodiment of the present invention has a metal layer pattern 104 ′ having a clear outline along the front edge thereof. In addition, the LCD protective panel 10 has a paint layer on which a specific figure or character is embodied. Therefore, the LCD protective panel 10 as a whole has a metal layer pattern 104 'having a metallic luster and color, and a paint layer implemented in various colors and designs, thereby providing a more diversely decorated appearance. .

2 is a process chart showing a post-treatment method of a plastic injection molding according to an embodiment of the present invention, and FIGS. 3 to 7 are views illustrating a post-treatment method of a liquid crystal protective panel injection molding according to an embodiment of the present invention. These are cross-sectional views taken along I-1.

1 and 2, first, the injection molding method is applied to manufacture a plastic injection molding. (S1) In one embodiment of the present invention, the plastic injection molding liquid crystal protection panel injection (100; below liquid crystal protection) of a wireless mobile communication terminal. Panel injection molding). The liquid crystal protective panel injection molded product 100 may be manufactured using, for example, a transparent synthetic resin such as acrylic resin, PC resin, or ABS resin. The liquid crystal protection panel injection molded product is manufactured to have a liquid crystal display part 100a and a body part 100b except for the liquid crystal display part.

Referring to FIGS. 1, 2 and 3, first, a first coating layer 102 covering the front surface of the liquid crystal protection panel injection molded product 100 is formed. (S2) The first coating layer 102 is a UV coating layer. It can be formed and formed to improve the adhesion of the metal layer by a subsequent process. The UV coating layer is fixed to expose the front surface of the liquid crystal protective panel injection molding 100 to the coating jig and spraying the UV coating resin in a spray method to selectively form only the front surface of the liquid crystal protective panel injection molding 100. Next, the metal layer 104 is formed on the first coating layer 102. (S3) The metal layer may be formed by a vacuum deposition method. For example, the metal layer may be formed by applying a filament evaporation method or a sputtering method. In one embodiment of the present invention, the metal layer may be formed of an aluminum layer, but is not limited thereto.

1, 2 and 4, the metal layer 104 is selectively laser etched to form a metal layer pattern 104 ′ remaining on the first coating layer. (S4) One embodiment of the present invention. In an example, the laser etching includes all methods capable of removing the metal layer 104 using a laser. In one embodiment of the present invention, the preferred laser etching method will be described in detail. First, a pattern of a portion of the metal layer 104 to be removed is input and stored into a memory of a computer by a scanner or other input device. The intensity of the laser is then programmed. Data programmed with the pattern and the intensity of the laser is sent to the laser device. Thereafter, the metal layer 104 is selectively removed by a laser emitted from the laser device. As a result, the metal layer pattern 104 ′ to be embodied on the liquid crystal protection panel injection molding 100 remains on the first coating layer 102. In an embodiment of the present invention, the metal layer pattern 104 ′ is formed along the edge of the liquid crystal protection panel injection molding 100, but may be implemented in the liquid crystal protection panel injection molding 100 according to an embodiment of the present invention. The design is not limited to this. In addition, in an embodiment of the present invention, the metal layer 104 is formed on the entire surface of the first coating layer 102. However, before the metal layer 104 is formed, a jig or a deposition mask is formed to cover the center of the liquid crystal protection panel injection molding 100 and the metal layer 104 is selectively formed only on the periphery of the liquid crystal protection panel injection molding 100. In this case, the processing time of subsequent laser etching may be shortened.

In the exemplary embodiment of the present invention, the metal layer pattern 104 is designed on the first coating layer 102 by performing laser etching after depositing the metal layer 104 on the first coating layer 102 as described above. ′). As a result, the metal layer pattern 104 ′ laser-etched and remaining on the first coating layer 102 may have a clear outline, thereby preventing a problem due to the spreading of the outline of the metal layer pattern 104 ′.

1, 2 and 5, after the metal layer pattern 104 ′ is formed, a urethane coating layer 106 is formed on the metal layer pattern 104 ′ and the first coating layer 102. S5) The urethane coating layer 106 is formed to improve adhesion between the UV coating layer formed of the first coating layer 102 and the second coating layer 108 to be formed by a subsequent process. Next, a second coating layer 108 is formed on the urethane coating layer 106. (S6) The second coating layer 108 prevents corrosion and surface scratches of the metal layer pattern 104 'and further, It is formed to improve the overall wear resistance of the liquid crystal protective panel injection molding 100, it can be formed as a UV coating layer. The UV coating layer formed of the urethane coating layer 106 and the second coating layer 108 may be formed by a spray spraying method as in the method of forming the first coating layer 102.

According to the exemplary embodiment of the present invention, the metal layer pattern 104 ′ is formed on the front surface of the liquid crystal protection panel injection molding 100, and further, as described later, a paint layer is formed on the back side of the liquid crystal protection panel injection molding 100. By further forming, the appearance of the liquid crystal protection panel injection molded product 100 may be more variously decorated.

1, 2 and 6, after the second coating layer 108 is formed on the front surface of the liquid crystal protection panel injection molding 100, first, the front surface of the liquid crystal protection panel injection molding 100 and the liquid crystal are formed. Paint masks are formed to cover the liquid crystal display part 100a on the rear surface of the protective panel injection molded product 100. The painting masks may be a masking material in the form of a tape. Subsequently, a color layer is formed on the body portion 100b on the rear surface of the liquid crystal protective panel injection molding 100 using the color masks as a color barrier. The paint layer may be formed as a single layer, but in one embodiment of the present invention, the paint layer has a laminated structure of a lower paint layer 112 and an upper paint layer (not shown) in order to enable various designs. (S7) The lower paint layer 112 refers to a paint layer formed in contact with the body portion 100b on the rear surface of the liquid crystal protection panel injection product 100, and the upper paint layer 112 is the lower paint layer 112. It refers to the paint layer formed on. The lower paint layer 112 and the upper paint layer may be formed by spraying a paint on the liquid crystal protection panel injection molded product 100 by a spray method by air.

After forming the upper paint layer, laser etching is performed to selectively remove a predetermined region of the upper paint layer to form an upper paint layer pattern 114 on the lower paint layer 112. (S8) As a result, As shown in FIG. 1, a specific pattern is implemented on the front surface of the liquid crystal protection panel injection molding 100 by a difference in light transmittance between a portion where the upper paint layer pattern 114 is formed and a portion where the upper paint layer is removed. . In the embodiment of the present invention, a plurality of simple rectangular designs are illustrated to facilitate understanding, but the designs that may be implemented in the liquid crystal protection panel injection molded product 100 by the present invention are not limited thereto, and various types of characters or figures may be used. This can be implemented. Thereafter, the paint mask is removed.

As described above, according to the present invention, a metal layer pattern having a clear outline on the surface of the plastic injection molding is formed by forming a metal layer on the surface of the plastic injection molding and performing laser etching to selectively remove the metal layer in the post-processing method of the injection molded product. It can be formed.

Claims (12)

Applying the injection molding method to produce a plastic injection molding, Forming a first coating layer on the surface of the plastic injection molding, Forming a metal layer on the first coating layer, Selectively laser etching the metal layer to form a remaining metal layer pattern on the first coating layer, Forming a urethane coating layer on the metal layer pattern and the first coating layer exposed by the laser etching; After-treatment method of the injection product comprising forming a second coating layer on the urethane coating layer. The method of claim 1, The first coating layer and the second coating layer is a post-treatment method of the injection product, characterized in that formed as a UV coating layer. The method of claim 1, The metal layer is post-processing method of the injection product, characterized in that formed by applying a vacuum deposition method. The method of claim 1, The metal layer is a post-processing method of the injection product, characterized in that formed by an aluminum layer. delete The injection molding method is applied to produce an LCD protective panel injection molding, wherein the LCD protective panel injection molding is manufactured to have a liquid crystal display unit and a body portion defined by the liquid crystal display unit, Forming a first coating layer covering a front surface of the liquid crystal protective panel injection molded product, Forming a metal layer on the first coating layer, Selectively laser etching the metal layer to form a remaining metal layer pattern on the first coating layer, Forming a urethane coating layer on the metal layer pattern and the first coating layer exposed by the laser etching; After-treatment method of the injection product comprising forming a second coating layer on the urethane coating layer. The method of claim 6, The first coating layer and the second coating layer is a post-treatment method of the injection product, characterized in that formed as a UV coating layer. The method of claim 6, The metal layer is a post-treatment method of the injection product, characterized in that formed by applying a vacuum deposition method. The method of claim 6, The metal layer is a post-treatment method of the injection product, characterized in that formed by an aluminum layer. delete delete The method of claim 6, After forming the second coating layer Forming paint masks covering a front surface of the liquid crystal protection panel injection molding and a liquid crystal display of the rear surface of the liquid crystal protection panel injection molding; Forming a lower coating layer on the body portion of the rear surface of the liquid crystal protective panel injection molding by using the painting masks as a coating prevention film; An upper paint layer is formed on the lower paint layer, And selectively laser etching the upper paint layer to expose a predetermined region of the lower paint layer.

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