KR100996199B1 - Fabrication method of case for mobile phone - Google Patents

Abstract

PURPOSE: A method for manufacturing a case for a mobile terminal is provided to improve the degree of freedom in a design of the case for a mobile terminal by implementing a high sensitive color through a simple process. CONSTITUTION: A film is printed by a roll-to-roll print device(S1). An adhesive layer is formed on one side of the printed film(S2). The film is cut with a sheet unit(S3). The film and plastic raw materials are integrated with an injection molding(S4). A plastic forming body is dried by a UV drier(S5). The plastic forming body is post-processed(S6). A protection tape is attached to the plastic forming body to protect the outer side of the plastic forming body(S7).

Description

Fabrication method of case for mobile terminal {Fabrication method of case for mobile phone}

The present invention relates to a method for manufacturing a case for a mobile terminal, and to a method for manufacturing a case for a mobile terminal in which a plastic case is injection molded and UV-dried onto an inkjet printed film to print a pattern, and a high sensitivity of the product in a simple process. Color, and design deformation in a variety of precise colors is facilitated, thereby contributing to the free design of the mobile terminal case, thereby satisfying the various tastes of consumers.

In modern society, demand for mobile phones is increasing exponentially, and with the advancement of technology, demand for mobile phones such as smart phones, PDAs, and DMBs is increasing, and mass production of high quality mobile phones is required Among the various components constituting the mobile phone, the case for the mobile terminal attached to the front and rear of the mobile terminal, in particular, is located in the exterior of the mobile phone, and various new designs are continuously released through various manufacturing processes. It is becoming.

On the other hand, the surface treatment method for the plastic molded article, such as the case for the mobile terminal, there are various types such as plating, vacuum deposition, painting, IML (In-Mold Labeling), IMD (In-Mold Decoration), the various surface treatment method Recently, many methods are used in-mold labeling (IML) and in-mold decoration (IMD) method, which is an injection molding simultaneous transfer technique manufactured by supplying a printed film to a mold into which plastic raw materials are introduced, in-mold molding and drying processing. Through mass production of a case for a mobile terminal is made.

The in-mold molding is a method of forming a pattern on an injection product by integrally bonding a film to an injection product by injecting a film on which a pattern is printed into a mold, It is most commonly applied to mass production of injection moldings.

Looking at the injection molding in detail, the IML method, which means in-mold labeling, is a method of inserting a formed film after inserting it into a mold, and the in-mold decoration, that is, the IMD method is a method of automatically supplying and injecting a film, and IML. The method is an injection molding method suitable for a small quantity of multi-product production system by inserting the shaped film into the mold one by one and the IMD method of the roll to roll method is a method of continuous flow of the work This continuous progress is characterized by the production of injection moldings suitable for large production systems.

On the other hand, the transfer film is inserted into the mold is printed on the pattern is supplied to the injection mold bar, the most commonly used printing method of the printing method is largely divided into gravure printing and screen printing.

The gravure printing is to dig the gland of the copper plate formed of a flat plate to form a concave plate printing to fill the ink in the recessed portion, scraping out the unnecessary ink of the protruding portion with the doctor plate, and pressure the ink of the recessed wire portion (pressure) In the case of screen printing, after the photosensitive solution is applied to the screen, the positive film is adhered to a predetermined position and inserted into an exposure machine to squeeze the light strongly. It is to be printed by scraping off.

However, when the gravure printing method and the screen printing method are both low in clarity and precise in color, such as a gradation effect, they are not expressive and cannot satisfy the preferences of the consumer, and light leakage phenomenon and rainbow phenomenon frequently occur. There was a problem of low reliability.

Therefore, the purpose of the present invention is to prevent the light leakage phenomenon and the rainbow phenomenon in advance, and to realize a beautiful mobile terminal case excellent in the realization of the three-dimensional three-dimensional effect as well as the high sensitivity gradation in the color expression.

The present invention was devised to solve the above problems, the printing step (S1) of ink-jet printing 1 to 2 degrees on a film in a roll to roll (Roll to Roll) method, and the adhesive layer after cleaning and drying the printed film An injection molding step (S2) of forming an adhesive layer (S2) for forming a film, a slitting step (S3) for cutting the film in a sheet unit, an injection molding step of feeding the film to the film and injecting the plastic raw material to perform injection molding so that the film and the plastic raw material are integrated S4), the UV drying step (S5) of inserting the injection-molded plastic molded article into the UV dryer and UV drying, and the post-processing step (S6) of removing the flash of the dried plastic molded part parting line to clean up the form, and the molded article (S7) of attaching a protective tape for protecting the outer appearance of the product to a roll-to-roll method. Implementation color and is characterized by a variety of contributing to the design screen.

The manufacturing method of the present invention for a mobile terminal case having the above process has the greatest effect of ensuring the reliability and aesthetics of the product in a quick and simple process.

The case for a mobile terminal is a part that is exposed to the exterior of the mobile terminal, and securing aesthetics is the most important issue. The case for a mobile terminal manufactured by the manufacturing method of the present invention is a roll-to-roll method, not conventional gravure printing and screen printing. It is possible to reproduce not only the gradation effect but also the three-dimensional sharp three-dimensional effect in the expression of color by injecting the inkjet printed film of the mobile device. It has the advantage of contributing even more to free design.

Further, there is another effect that the reliability of the product is secured by preventing the light leakage phenomenon and the rainbow phenomenon of the injection material caused by the conventional printing method.

The present invention relates to a method for manufacturing a case for a mobile terminal, and to a method for manufacturing a case for a mobile terminal in which a plastic case is injection molded and UV-dried on an inkjet printed foil to print a pattern. Color, and design deformation in a variety of precise colors is facilitated, thereby contributing to the free design of the mobile terminal case, thereby satisfying the various tastes of consumers.

Looking at the present invention manufacturing method of the mobile terminal case through Figure 1 showing the present invention attached manufacturing process diagram of the present invention,

As shown, a printing step (S1) for inkjet printing of the film 1 to 2 degrees in a roll-to-roll method, and an adhesive layer forming step (S2) of cleaning and drying the printed film to form an adhesive layer, An injection molding step (S4) of injection molding the film and the plastic raw material so that the film and the plastic raw material are unified by feeding the film to the film and injecting the plastic raw material into the mold; UV drying step (S5) is inserted into the UV dryer and UV-dried, the post-processing step (S6) to clean up the shape by removing the flash of the dried plastic molded part parting line, and a protective tape to protect the appearance of the molded product It consists of a protective layer forming step (S7) to implement a vivid high-sensitivity color of the product in a simple process and has a feature to contribute to various design.

The manufacturing of the case for a mobile terminal according to the present invention having the above process is made by first printing the film that is the design of the case, and the printing of the film is performed by inkjet printing so that the printing step S1 is performed. .

The printing step (S1) is a roll-to-roll printing equipment is provided, the sheet-based film is continuously supplied and printing is performed, the ink-jet equipment is attached to the roll-to-roll printing equipment is a film Inkjet printing.

The printing step (S1) is based on the 1-degree printing and deposition to perform an additional 2 degrees printing if necessary, the printing is to give a picture-like clarity using the inkjet resolution is 1200dpi.

The first-degree inkjet printed film is deposited using a deposition apparatus through a printing apparatus. The deposition is performed by heating and evaporating a metal of high purity in a vacuum state and coating a thin film on the surface of the film to be coated on a deposition apparatus placed in a high vacuum. The metal particles are evaporated and the metal particles are evaporated and condensed on the surface of the cold film so as to adhere to the surface of the film, The epidermis is attached to the skin to form a film.

After the deposition is completed, the film is detached from the evaporator to inspect the appearance of scratches, and then additionally prints a design layer if necessary. The film is printed and dried to protect the deposited film and to produce various colors.

When the printing of the film is completed by the printing step (S1), a hot melt adhesive layer is formed on one side of the printed film. The printed film is washed and dried to remove foreign substances, and then the adhesive layer binder is treated with a hot melt to facilitate plastic raw materials. It is to be bonded so that the adhesive layer forming step (S2) is performed.

The adhesive film obtained by the adhesive force is cut in a predetermined unit for injection molding, through the slitting step (S3) for cutting in the sheet unit to facilitate the injection molding is automatically performed in a roll type.

On the other hand, the completed film binder is injection molded to the dried plastic raw material, the injection molding step (S4) is to insert the film into the injection mold and to put the plastic raw material to combine the film and the plastic raw material integrally. , The adhesive layer formed on one side of the film is in contact with the plastic raw material so that the plastic raw material and the film are firmly integrated. The in-mold molding not only raises the surface hardness, but also makes the product slimmer.

Meanwhile, when the in-mold injection is completed, the plastic injection molding is detached from the injection mold to determine whether the injection process has been performed smoothly and dried. The UV drying step is performed by inserting into a prepared UV dryer to dry UV and forming a UV coating layer. By performing (S5), the remaining foreign matter is removed.

The UV-dried plastic injection molding is subjected to a post-processing step (S6) of removing the flashing of the parting line and sorting out the shape. When additional decoration is required, it may be further processed by performing additional deposition or painting.

(S7) for attaching a protective tape for protecting the appearance of the injection molded product, if the complete mold for the take-out is formed through the post-molding step (S6) The protective tape to be attached is most preferably a PET film of 38㎛ 50㎛.

The mobile terminal case manufactured by the above process undergoes an external inspection and determines whether or not a defect is carried out, and the mobile terminal case for implementing a beautiful design in a simple process is mass-produced.

The mobile terminal case manufactured by the above process has a configuration in which a plastic raw material, an adhesive, an ink layer, a UV coating layer, and a PET protective film layer are sequentially stacked, and a mobile terminal case for securing a beautiful design with a simple configuration. This will be reproduced.

1 is a manufacturing process diagram of the present invention

[Description of Code for Major Parts of Drawing]

S1: printing step S2: adhesive layer forming step

S3: Slitting Step S4: Injection Molding Step

S5: UV drying step S6: Post processing step

S7: protective layer forming step

Claims (1)

An ink layer is printed on the film, and the plastic raw material and the printed film are inserted into a mold, followed by injection molding to integrate the film and the plastic raw material, and then a protective layer is formed. In the manufacturing method of the case for a mobile terminal manufactured to have a configuration in which the UV coating layer, PET protective film layer is sequentially laminated, Printing step (S1) for printing by depositing 1 to 2 degrees on the film by a roll to roll method using an inkjet of 1200 dpi resolution, An adhesive layer forming step (S2) of cleaning and drying the printed film and then forming an adhesive layer by treating the adhesive layer with hot melt on one surface of the printed film; Slitting step (S3) for cutting the film by a predetermined sheet unit, An injection molding step (S4) of inserting a film into a mold and injecting the plastic raw material so that the adhesive layer formed on one surface of the film contacts the plastic raw material, thereby molding the film and the plastic raw material firmly and integrally; UV drying step (S5) and the UV coating layer is formed by inserting the injection molded plastic injection molding into a UV dryer, UV coating layer, After processing step (S6) to clean up the shape by removing the flash of the plastic injection part parting line, etc., The protective layer forming step (S7) of attaching a PET film of 38㎛ 50㎛ thickness to protect the appearance of the plastic injection molding (S7) of the case for a mobile terminal characterized in that to achieve a vivid high-sensitivity color to secure a beautiful design Manufacturing method.

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