KR100893142B1 - Coating device equipped with spray means and manufacturing method for coating film using thereof - Google Patents

Abstract

An apparatus for coating film for the cellular phone exterior and a film coating method using the same are provided, which realize spray printing the hard-coating layer on the continuous feeding film. An apparatus for coating film for the cellular phone exterior comprises: a first unwinder in which the base film(F) is reeled(10); a first spray unit(20) applying the first fluid on the base film supplied to the first unwinder; a first drying unit(30) which is arranged at the rear of the first spray unit; a second spray unit(40) which is arranged at the rear of the first drying unit and coats the base film with the second fluid; and a covering unit(C) covering the printing surface of the base film passed through the second drying unit.

Description

Film coating apparatus for mobile phone exterior material with spraying means and film coating method using same {COATING DEVICE EQUIPPED WITH SPRAY MEANS AND MANUFACTURING METHOD FOR COATING FILM USING THEREOF}

The present invention is a film coating apparatus that can be used in a mobile phone exterior material, that is, a case or a keypad, or other electronic products such as MP3 player, PDA, navigation, DMD terminal, notebook, etc. And relates to a film coating method manufacturing method using the same,

More specifically, after spraying the hard coating layer directly on the exterior material after injection of the conventional exterior material or by printing the hard coating layer on the film by using a gravure printing method and transferring the hard coating layer on the exterior material, there is a problem of low productivity and low quality. In order to solve the present invention relates to a film coating apparatus and a coating method embodying a method of spray printing the hard coating layer directly on the continuous feed film in the unwinder.

Protective layer to protect color and letters, numbers, and patterns after introducing them into exterior materials of various electronic products such as mobile phones, MP3 players, MPD, navigation, DMD terminals, notebooks, etc. (Especially hard coating layer) to form

After the injection of the exterior material, the spray printing method is applied directly to the exterior material, and a release material, a protective layer, and a color layer are sequentially formed on the transfer film and then transferred to the exterior material.

The method of directly spraying (or stamping using a laser) on the extruded exterior material has a problem in that the productivity is significantly lowered and the incidence of product defects is high.

In addition, the master of the transfer method to obtain a transfer film through the gravure printing on the base film through a device such as patent registration No. 0793663 (2008.01.04) "printing device" of SFA,

The problem with this method is that the thickness of the hard coating layer of the protective layer is formed only about 2㎛ through one printing,

At least it has to go through a repeated roll coating process to obtain a thickness of about 30㎛ to meet the performance test, such as chemical resistance and hardness properties, there is also a problem of low productivity.

In particular, even after the transfer of the protective layer using a transfer film using a gravure printing method through a conventional repeated application process, the physical properties of the exterior material were not satisfactory, and it was common to apply the UV coating to the exterior-extruded exterior material once again.

The present invention has been proposed to solve the problems of productivity and quality of the conventional injection molded exterior material direct printing method or the method of transferring the transfer film through gravure printing to the exterior material after manufacturing.

This problem of the prior art is mainly due to the fact that electronic product vendors (mainly domestic or multinational corporations), electronic parts (particularly case) producers, and transfer film producers are separated by order production methods.

It meets the required quality conditions (in case of mobile phone exterior material, the coating thickness test of hard coating layer, the adhesion test of hard coating layer, tape detachment test after X-cutting, chemical resistance test, pencil hardness test, dyeing test, cosmetic test, UV test, etc.) It is an urgent task considering that the transfer film producer's productivity is lowered and the productivity is lowered as much as possible.

In addition, according to the present invention, the printing layer required for all electronic products, especially a mobile phone case and a keypad such as a release agent layer and a hard coating layer, is continuously printed on a base film supplied from an unwinder according to a multi-product small quantity production industry system.

Finally, the protective film covering the printing surface is bonded and wound to produce a transfer film.

Print letters, numbers, and patterns (gravure, silkscreen, or spray print) on the transfer film of the appropriate length according to demand (remove the protective film covering the printing surface first), and then, if necessary, window formation. In order not to print

Finally, the transfer process is carried out in the injection mold, which aims to systematize the production process of electronic products, improve productivity, and improve product quality.

In order to achieve the above object, a film coating apparatus for a mobile phone exterior material having a spraying means according to the present invention is provided.

A first unwinder in which the base film is wound;

First spraying means for applying a first fluid to the base film supplied from the first unwinder;

First drying means arranged behind said first spraying means;

Second spraying means arranged behind the first drying means and applying a second fluid to the base film;

Second drying means provided behind the second drying means; And

A covering means including a second unwinder in which a protective film is wound, and covering the protective film supplied from the second unwinder on the printing surface of the base film passed through the second drying means;

It is made, including.

In addition, the film coating device for a mobile phone exterior material having a spraying means according to the present invention, the base film supplied from the first unwinder is composed of a print film layer and a damage prevention film layer while simultaneously meeting film durability and print quality. It is desirable that the manufacturing cost can be lowered.

Furthermore, the film coating apparatus for a mobile phone exterior material having a spraying means according to the present invention includes the first or the second spraying means, or both of which are provided in a chamber, and comprising a guide roller and a spray nozzle provided under the base film. desirable.

In addition, the film coating apparatus for a mobile phone exterior material having a spraying means according to the present invention further comprises an exhaust means in the chamber,

The injection nozzle may be moved by a conveying means,

The first or second drying means, or both are composed of a hot air drying method,

Bonding of the protective film and the base film in the covering means is made by a pressing roller,

Preferably, the first fluid sprayed from the first spraying means is a release agent, and the second fluid sprayed from the second spraying means is a hard coating layer.

In addition, the film coating method for a mobile phone exterior material according to the present invention comprises a first spraying step of applying a first fluid to the base film supplied from the first unwinder; A first drying step of drying the first fluid layer formed in the first spraying step; A second spraying step of applying a second fluid to the base film after the first drying step; A second drying step of drying the second fluid layer formed in the second spraying step; And a covering step of covering the protective film supplied from the second unwinder on the printing surface of the base film after the second drying step.

The present invention prints the first and second fluids on the base film continuously supplied from the first unwinder through the first and second spraying means, respectively, and arranges the first and second drying means behind each spraying means. After the printing and drying, after passing the covering means to cover the protective film on the printing surface, the final product is wound up in the winder

According to the multi-volume production industry system, all the electronic products such as release agent layer and hard coating layer, especially the printing layer required for mobile phone case and keypad, are continuously printed on the base film supplied from the unwinder.

Finally, the protective film covering the printing surface is bonded and wound to produce a transfer film.

After printing the letters, numbers, and patterns (gravure, silkscreen or spray printing) on the transfer film of appropriate length according to the demand, and not printing to form the window if necessary.

Finally, the transfer process is carried out in the injection mold, so that the production process of the electronic products can be improved, the productivity can be improved, and the product quality can be improved.

This solves the problems of productivity and quality of the conventionally injected exterior material direct printing method or the method of transferring the transfer film through gravure printing to the exterior material, mainly by the order production method of electronic product vendors (mainly domestic large companies or In the reality of the separation of multinational corporations, electronic component parts (especially case) producers, and transfer film producers, it is possible to meet the required quality requirements and to increase productivity while keeping production costs as low as possible.

Hereinafter will be described with reference to the accompanying drawings a film coating apparatus for a mobile phone exterior material having a spray means according to the present invention and a coating film manufacturing method using the same.

As shown schematically in FIG. 1, the coating apparatus according to the present invention includes a first unwinder 10, first and second spraying means 20, 40, each sprayed with a base film F wound thereon. Covering means (C) comprising the first and second drying means 30, 50 arranged behind the means, the second unwinder 60 wound around the protective film (S), and winding the final film It is composed of a winder (70).

The base film (F), including PET or PC film, nylon resin, polyamide resin, polyester resin, EVOH resin, polyurethane, polyethylene resin or polypropylene resin may be selected as necessary, the surface hardness is It may be selected to have a physical property of about 2H ~ 4H,

In particular, as shown in the circle "A" enlarged in Figure 1, it consists of two layers, the print film layer (F1) and the damage prevention film layer (F2) (especially to meet the scratch resistance) to achieve film durability and print quality at the same time It aims at reducing manufacturing cost while satisfying.

The first or second spraying means 20, 40, or both are provided in the chambers 23, 43, the guide rollers 25, 45 and the injection nozzle 21 is provided below the base film (41).

The guide rollers 25 and 45 will typically be composed of idle rollers, and the injection nozzles 21 and 41 are appropriately selected according to the characteristics of the fluid and the coating thickness.

In addition, the chambers 23 and 43 are further provided with exhaust means 27 and 47 to assist ventilation and the polluted air that is exhausted is preferably treated through a purification facility (not shown).

Furthermore, as schematically shown in the enlarged circle "B" in FIGS. 1 and 1, the spray nozzles 21 and 41 are preferably movable by means of transfer means 29 and 49.

The conveying means 29 and 49 may be composed of a pulley 29A and 49A and a rail 29B and 49B.

The introduction of the injection nozzles 21 and 41 and the conveying means 29 and 49 is for adjusting the coating thickness of the first fluid and the second fluid.

In addition, the coating thickness adjusting factors of the first fluid and the second fluid may be determined by the characteristics of the fluid, the base film feed rate, the fluid spray amount and the spray type (nozzle structure), the degree of spraying and drying of the same fluid, and the like.

In the first or second spraying means 20, 40, pumps 21a and 41a are connected through injection nozzles 21 and 41 through supply pipes 21b and 41b.

The pumps 21a and 41a and the unwinder 10 and 60, the winder 70, and the conveying means 29 and 49 are pulleys 29A and 49A, and first and second drying means. Controls such as 30 and 50 may be controlled through a programmable logic controller (PLC). At this time, it would be desirable to automate by inputting control conditions according to various film characteristics in advance.

Next, the first or second drying means 30, 50, or both are preferably configured in a hot air drying method, for the implementation of the hot air nozzle (not shown) through a heater and a blower (not shown) 31, 51, each drying means is provided with chambers 33, 53,

If necessary, various drying methods (e.g. IR drying) can be used.

In addition, each chamber is preferably provided with an exhaust fan and a purifying unit (not shown) as necessary. In each drying means, guide rollers 31 and 51 supporting the base film F are arranged.

Subsequently, the adhesion of the base film F and the protective film S on which each fluid is printed in the covering means C is implemented in the form of the pressing roller 61.

Transfer of the protective film (S) from the second unwinder (60) constituting the covering means (C) to the pair of pressing rollers (61) passes through a plurality of guide rollers (63) to maintain an appropriate tension. It consists of a form.

Next, the first fluid injected from the first spraying means 20 is preferably a release agent. The mold release agent is generally used to prevent adhesion of the final molded article, that is, the exterior material and the base film (more precisely, the print film layer), and for example, silicone oil-based ones may be used in the present invention.

In addition, the second fluid injected from the second spraying means 40 is preferably a hard coating layer.

The hard coating layer is to protect the color layer for the character or pattern to be formed over the hard coating layer after removing the protective film (S), it can be made of ABS resin, acrylic resin, PC resin, SAN resin, urethane resin, etc. It is selected in consideration of physical properties and formability, and is a light transmissive material such as a transparent material is preferable for the appearance of the color layer and the light source effect (especially in the case of a key bed).

The hard coating layer is preferably not a UV curable coating agent, but a thermosetting coating, in particular, a urethane-based thermosetting coating, so that cracks do not occur in the finished product while satisfying the hardness (2H to 4H) of the desired coating layer.

Therefore, even if the injection molded parts of the window portion requiring high hardness (2H to 4H) and other exterior parts having relatively low required hardness conditions are integrally formed, there is no problem in the finished product quality.

In addition, while the appearance is manufactured with an exterior material having a variety of colors and designs, the overall exterior material is integrally formed so that the window portion and the other exterior material portions can be seamless.

Next, as shown in Figure 2, the film coating method for a mobile phone exterior material according to the present invention in the first spraying step (S1) for applying the first fluid to the base film (F) supplied from the first unwinder (10) ); A first drying step (S2) of drying the first fluid layer formed in the first spraying step; A second spraying step (S3) of applying a second fluid to the base film (F) after the first drying step; A second drying step (S4) of drying the second fluid layer formed in the second spraying step; And a covering step (S5) of covering the protective film supplied from the second unwinder 60 on the printing surface of the base film after the second drying step.

In the film coating method for a mobile phone exterior material according to the present invention, the base film F supplied from the first unwinder 10 is preferably composed of a print film layer F1 and a damage prevention film layer F2,

In addition, the first fluid sprayed in the first spraying step S1 is a release agent, and the second fluid sprayed in the second spraying step S3 is preferably a hard coating layer.

In the above description, the conventionally known techniques related to a specific base film material (especially a print film layer and a damage preventing film layer material), a protective film material, a release agent type, a hard coating agent type, etc. are omitted, but those skilled in the art can easily infer and infer this. Can be reproduced.

In addition, in the above description of the present invention with reference to the accompanying drawings, the coating apparatus having a specific arrangement order was mainly described, but the present invention is capable of various modifications, changes and substitutions by those skilled in the art, such modifications, changes and substitutions are present It should be interpreted as falling within the protection scope of the invention.

For example, the arrangement of the spraying means and the drying means may be appropriately added according to the required number, and the spraying means and the drying means for the same fluid may be repeatedly arranged. In addition, it is possible to spray-print various protective layers such as a hard coating layer (UV coating layer, etc.) directly onto the base film by omitting releasing agent spray (the base film is not removed but attached to the exterior material), and furthermore, letters and numbers Even color layers for patterns can be introduced by spray printing.

1 is a schematic conceptual view of a film coating apparatus for a mobile phone exterior material having a spraying means according to the present invention;

Figure 2 is a block diagram showing a film coating method for a mobile phone exterior material having a spray means according to the present invention.

<Explanation of Signs of Major Parts of Drawings>

F: Base Film S: Protective Film

10: first unwinder 20: first spray means

30: first drying means 40: second spraying means

50: second drying means 21, 41: spray nozzle

23,43: chamber 25,45: guide roller

27,47: exhaust fan 29,49: transfer means

31,51: Hot air nozzle 33,53: Chamber

35, 55: Guide roller 60: Second winder

61: pressing roller 63: guide roller

70: winder

Claims (11)

A first unwinder in which the base film is wound; First spraying means for applying a first fluid to the base film supplied from the first unwinder; First drying means arranged behind said first spraying means; Second spraying means arranged behind the first drying means and applying a second fluid to the base film; Second drying means provided behind the second drying means; And It includes a second unwinder winding the protective film, covering means for covering the protective film supplied from the second unwinder on the printing surface of the base film passed through the second drying means; The base film supplied from the first unwinder is a film coating device for a mobile phone exterior material having a spray means, characterized in that consisting of a print film layer and a damage prevention film layer. delete The method of claim 1 wherein the first or second spraying means, or both It is provided in the chamber, the film coating device for a mobile phone exterior material having a spray means, characterized in that consisting of a guide roller and a spray nozzle provided in the base film. The method of claim 3, wherein The chamber is a film coating apparatus for a mobile phone exterior material having a spray means, characterized in that the exhaust means is further provided. The method of claim 3, wherein The spray nozzle is a film coating device for a mobile phone exterior material having a spray means, characterized in that movable by the transfer means. The method of claim 1, wherein the first or second drying means, or both of them. Film coating device for a mobile phone exterior material having a spray means characterized in that the hot air drying method. 6. The method according to any one of claims 1 to 3, wherein said covering means Bonding of the protective film and the base film is a film coating apparatus for a mobile phone exterior material having a spray means, characterized in that made by a pressing roller. The method according to any one of claims 1 and 3 to 5, The first fluid injected from the first spraying means is a release agent, The second fluid sprayed from the second spray means is a film coating apparatus for a mobile phone exterior material having a spray means, characterized in that the hard coating layer. A first spraying step of applying a first fluid to the base film supplied from the first unwinder; A first drying step of drying the first fluid layer formed in the first spraying step; A second spraying step of applying a second fluid to the base film after the first drying step; A second drying step of drying the second fluid layer formed in the second spraying step; And The covering step of covering the protective film supplied from the second unwinder on the printing surface of the base film passed through the second drying step; The base film supplied from the first unwinder is a film coating method for a mobile phone exterior material, characterized in that consisting of a print film layer and a damage prevention film layer. delete The method of claim 9, The first fluid injected in the first spraying step is a release agent, The second fluid sprayed in the second spraying step is a film coating method for a mobile phone exterior material, characterized in that the hard coating layer.

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