KR20150025657A - Digital flatbed printer inkjet printing method using the UV coating for thermosetting resin surface - Google Patents

Abstract

The present invention relates to a UV coating method of a non-combustible resin product surface of an ink jet printing type using a digital flatbed printer, and in a UV coating method, a product formed through (a) incombustible resin is divided into a plurality of parts by injection molding Molding into a shape to be coupled to the product; (b) performing a surface cleaning operation on each of the divided incombustible resin products with an ionizer; (c) mounting the cleaned incombustible resin product on the fixing jig 30 manufactured to correspond to the size of the nonflammable resin product formed on the flat plate of the digital flat panel printer 20; (d) setting the injection site so that the UV coating exactly coincides with the surface of the nonflammable resin product through the UV curable coating liquid only on the dimension of the respective non-combustible resin product in the control computer of the digital flatbed printer 20; (e) inputting to the control computer an optimum injection amount for the non-combustible resin product in the control range of the injection amount of 1 wt% to 200 wt%; (f) a UV-curable coating liquid is applied to a cleaned incombustible resin product placed on a fixing jig 30 manufactured to correspond to the size of the incombustible resin product of the digital flatbed printer 20 by an ink jet printing method Forming a UV coating layer for coating and patterning in a thickness of 4 to 70 mu m by coating only a desired area in a digital flat panel printer; (g) drying the nonflammable resin product formed with the UV coating layer in an IR drier at a temperature of 50 to 80 캜 for 3 minutes to 10 minutes to level the coating surface of the UV coating layer; (h) fully curing the incombustible resin product formed with the dried and leveled UV coating layer under the conditions of 500J (joule) to 1000J (joule) in a dry-type irradiator; (i) inspecting and packaging the non-combustible resin product in which the UV coating layer is dried to produce an incombustible resin article having the UV coating layer formed thereon. Coating method.

Description

TECHNICAL FIELD [0001] The present invention relates to a UV-curable inkjet printing method, and more particularly, to a UV-curable inkjet printing method using a digital flatbed printer,

The present invention relates to a method of UV coating a surface of an incombustible resin product using an inkjet printing method using a digital flatbed printer, and more particularly, to a method of quickly and easily forming a UV coating layer on a surface of a non- It is possible to mass-produce a product in which a large number of UV coating layers are formed within a short time, and it is possible to easily produce a non-inflammable resin product having excellent coating properties, In order to compensate for the fact that the coating liquid which is consumed at the time of coating is injected into the back surface of the coating liquid due to the injection pressure, Without any kind of masking work process. The ink jet printing method using a digital flatbed printer neungham to significantly reduce the production costs of non-combustible resin products related to surface UV coating.

Recently, various home appliances that can enjoy various cultural contents such as video and sound are being developed due to the development of the digital industry, and home appliances for enjoying various cultural contents such as video and sound are being used as computers, smart phones, And smart home appliances, which are closely related to individual users such as home appliances, are gaining popularity.

Such smart household appliances are generally used in the form of a product made of a non-combustible resin, which is a polymer compound, and are used by users. In order to improve scratch resistance and durability on the surface of such a non-inflammable resin product, It is being released by work or coating. Here, the coating of the surface of the nonflammable resin product is intended to improve the quality of the product by coating the surface of the nonflammable resin product so as to improve the gripability but to protect the product and to improve the waterproof property and to exhibit gloss.

Moreover, in recent years, eco-friendly products such as ECO (Eco, Eco) have been introduced to these products. For this purpose, UV coating is applied to the surfaces of home appliances, mobile phones and building materials In this way, various textures and colors are realized.

However, the application of such conventional UV coatings to home appliances simply irradiates the UV coating liquid onto the surface of household electric appliances and is irradiated through ultraviolet rays. As a result, there is no significant effect due to differences in curing by general coating and ultraviolet ray irradiation Respectively.

Furthermore, since the UV coating is rapidly cured and dried, it is practically difficult to express a variety of textures, colors, and patterns. For this purpose, a general coating method or a coating using a film is firstly carried out, UV coating. In addition, since such a UV coating has a problem that the slip property is rather increased due to glossiness due to ultraviolet ray irradiation, it is necessary to add a non-slip coating such as silicone in the case of a cell phone or a smart phone, There is a problem that increases the number and increases the production cost.

In other words, the conventional UV coating is merely to cure by simple application to enhance the water tightness for protecting the outer appearance of the product and for improving the waterproof property. As described above, in order to give effects such as various patterns, There is a problem that an expensive cost of coating and equipment are required and the production cost of the product actually rises, resulting in an increase in the economic cost to be passed on to the consumer.

Such UV coating by the conventional UV coating method can not selectively coat a desired site on the surface of the product, and since the entire coating is required, the UV coating liquid as described above is excessively consumed and the production cost is increased . In addition, in the production process, the entire surface is coated with UV in addition to the surface of the desired product, so that the coating liquid penetrates into the opposite side of the surface of the product where the UV coating is not required or the assembly surface to be assembled. It is necessary to perform a separate masking operation in order to prevent the occurrence of a design error, thereby increasing the production time and thereby limiting the mass production.

Such a conventional UV coating method is disclosed in Korean Patent Publication No. 10-2010-0055902. In the injection molding using the conventional ultraviolet digital printing and the method of manufacturing the injection molding, undercoat primer-intermediate 1 degree primer-UV digital printing-middle 2 degree primer-UV coating is applied to the entire surface of the injection molded article designed by synthetic resin through vapor deposition or spray paint This is achieved through the application of UV digital printing and coatings for the realization of designs other than UV coatings for simple protection and waterproofing of products.

However, such an improved conventional UV coating also preliminarily designs the injection mold and deposits or sprays the UV digital printing and coating over the corresponding shape, and when the process is completed, only the portion corresponding to the injection product is used . Such a method still causes excessive waste of the coating solution, resulting in an increase in the unit cost of production. Rather, it requires a primer process such as undercoat, middle 1 degree and middle 2 degree, There is still a problem of a decrease in productivity of mass production.

Furthermore, there is a limit to the expression of various designs and textures due to a design that is limited to a simple gradation or a single color shape.

Korean Patent Publication No. 10-2010-0055902, published on May 27, 2010.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in an effort to solve the problems as described above, and it is an object of the present invention to provide a method and apparatus for quickly and easily performing a UV coating layer on a surface of an incombustible resin product, Accordingly, it is possible to mass-produce non-flammable resin products formed with a large number of UV coating layers in a short time, and it is possible to easily manufacture the non-flammable products, It can be produced without any masking work process on the back side of nonflammable product in order to compensate the fact that the coating liquid sprayed at the time of coating precisely coats only the required part, the part of the coating liquid penetrates into the backside due to the injection pressure, , It is possible to reduce the production process To provide a Hi nonflammable resin of the ink-jet printing method using a flat panel digital printer that can reduce the product surface UV coating method it is an object.

In order to achieve the above object, there is provided a UV coating method for a surface of a non-combustible resin product using an inkjet printing method using a digital flat panel printer, the method comprising the steps of: (a) A step of dividing the mold into a shape to be joined to the product, (b) performing a surface cleaning operation on each of the divided incombustible resin products with an ionizer; (c) mounting the cleaned incombustible resin product on the fixing jig 30 manufactured to correspond to the size of the nonflammable resin product formed on the flat plate of the digital flat panel printer 20; (d) setting the injection site so that the UV coating exactly coincides with the surface of the nonflammable resin product through the UV curable coating liquid only on the dimension of the respective non-combustible resin product in the control computer of the digital flatbed printer 20; (e) inputting to the control computer an optimum injection amount for the non-combustible resin product in the control range of the injection amount of 1 wt% to 200 wt%; (f) a UV-curable coating liquid is applied to a cleaned incombustible resin product placed on a fixing jig 30 manufactured to correspond to the size of the incombustible resin product of the digital flatbed printer 20 by an ink jet printing method Forming a UV coating layer for coating and patterning in a thickness of 4 to 70 mu m by coating only a desired area in a digital flat panel printer; (g) drying the nonflammable resin product forming the UV coating layer in an IR drier at a temperature of 50 to 80 캜 for 3 minutes to 10 minutes to level the coating surface of the UV coating layer; (h) fully curing the incombustible resin product formed with the dried and leveled UV coating layer under the conditions of 500J (joule) to 1000J (joule) in a dry-type irradiator; (i) inspecting and packaging the non-combustible resin product in which the UV coating layer is dried to produce an incombustible resin article having the UV coating layer formed thereon.

The viscosity of the UV curable coating liquid is 7.5 s to 8 s.

The present invention relates to a non-flammable resin product in which a UV coating layer can be quickly and easily performed on a surface of a non-flammable resin product required by an ink-jet printing method using a digital flatbed printer and thus a large number of UV coating layers are formed in a short time It is possible to mass-produce and minimize the amount of coating liquid consumed by precisely coating only the parts required for each product without coating the whole of the non-combustible resin product, and when coating the required part only, Which can reduce the number of production processes and reduce the production cost because it can be produced without various masking work processes on the back side of the non-combustible resin product to compensate the point that the part of the coating liquid penetrates to the back surface and the adhesion force is lowered. .

FIG. 1 is a block diagram of a method of UV coating a surface of a nonflammable resin product using an inkjet printing method using a digital flat panel printer according to the present invention.
FIG. 2 is a side view showing a state in which a UV coating layer is formed only on a surface of a nonflammable resin product through a UV coating method of a nonflammable resin product using an ink jet printing method using a digital flat panel printer according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention and to fully disclose the scope of the invention to a person having ordinary skill in the art to which the present invention belongs. And the present invention is only defined by the scope of the claims. Accordingly, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

Like reference numerals refer to like elements throughout the specification. And, the terms used (hereafter) used herein are intended to illustrate the embodiments and are not intended to limit the invention in any way. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. Also, components and acts referred to as " comprising (or comprising) " do not exclude the presence or addition of one or more other components and operations.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

Hereinafter, the technical features of the UV coating method of the nonflammable resin product of the inkjet printing method using the digital flat panel printer of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a method of UV coating a surface of a nonflammable resin product using an ink jet printing method using a digital flat panel printer according to the present invention. In the step (a) to (i) In the step (a), the product formed through the incombustible resin is divided into a plurality of parts by injection molding, and is molded into a shape to be coupled to the product.

In the step (b), a surface cleaning operation is performed with an ionizer to remove foreign substances such as dust on the surface of each of the non-combustible resin products which are injection-molded through the incombustible resin through the step (a) do. Here, the ionizer has an input voltage of +24 VDC, an output frequency of 0.1 Hz to 33 Hz, a pulsed AC ion generation method, an ion balance of +/- 30 V, a discharge distance of 100 mm to 2000 mm, a supply air CDA (Clean Dry Air) 3 ~ 5Kgf / Cm2, ozone generation amount is 0.005 or less, operating temperature is 0 ~ 50 ℃, and operating humidity is 35 ~ 65% RH, and surface foreign matter of nonflammable resin product is removed.

Subsequently, in step (c), the cleaned incombustible resin product is fixed on the fixing jig 30 manufactured to correspond to the size of the incombustible resin product formed on the flat plate of the digital flat panel printer 20 and fixed.

Here, the fixing jig 30 is formed in a shape corresponding to the shape of each of the plurality of non-combustible resin products divided into the shape of the injection-molded non-combustible resin product, and is used in the printing process of the digital flat panel printer 20 of the ink- So as to be fixed.

the non-combustible resin product 10 fixed to the fixing jig 30 of the digital flatbed printer 20 through the step (c) is set to accurately set the UV coating range through the step (d) The control computer of the digital flatbed printer 20 sets the injection site so that the UV coating exactly coincides with the surface of the incombustible resin product 10 through the UV curable coating liquid only on the dimension of each incombustible resin product 10. [ do.

In step (e), the optimum injection amount for the non-combustible resin product is input to the control computer in the control range of the injection amount of 1 wt% to 200 wt%, and step (f) The UV-curable coating liquid is applied to the cleaned incombustible resin product 10 placed on the fixing jig 30 manufactured in correspondence with the size of the liquid crystal panel 10 by the ink jet printing method in the digital flat panel printer 20 And a UV coating layer 40 is formed to coat and pattern in a thickness of 4 to 70 mu m.

Here, the viscosity of the UV curable coating liquid is preferably 7.5 s to 8 s. In general, the viscosity of a general UV curable coating liquid is 9 s, which is high in viscosity due to its low flowability, making it impossible to print a UV curable coating liquid in various designs. In addition, the UV curable coating liquid having a viscosity of less than 7.5s has a large flow rate, which is also impossible to print in various design forms of the UV coating layer, resulting in product failure.

Subsequently, in step (g), the nonflammable resin product having formed the UV coating layer is dried in an IR drier at a temperature of 50 to 80 ° C for 3 minutes to 10 minutes to level the surface of the coating layer of the UV coating layer , and (h), the incombustible resin product having formed the dried and leveled UV coating layer is fully cured in a drying apparatus under conditions of 500J (Joule) to 1000J (Joule).

Next, in step (i), the non-combustible resin product in which the UV coating layer is dried is inspected and packaged to produce an incombustible resin article having the UV coating layer formed thereon.

Through such a process, FIG. 2 shows a state in which a UV coating layer 40 is formed only on a portion required for the incombustible resin product 10 through the UV coating method of the nonflammable resin product surface of the inkjet printing method using the digital flat panel printer according to the present invention As can be seen, it is possible to coat the optimal UV coating area without loss of the rapid, UV-curable coating liquid, thereby facilitating mass production, and the entire non-incombustible resin product 10 is not coated, It is clear that a separate masking process is not required on the surface of the substrate, and furthermore, it can be roughly divided into a coating method using a silk screen printing and an acrylic jig by a conventional printer head jetting method.

That is, the UV curable coating liquid flows to the bottom surface of the non-combustible resin product 10, resulting in a defect due to a design error of the product assembly edge, or the UV curable coating liquid flows between the acrylic jig and the non- It is possible not only to prevent the thickness and the coating area from being defective but also to minimize the loss of unnecessary expensive UV curable coating liquid.

Accordingly, as shown in FIG. 2, it is possible to accurately perform UV coating in a range required by the UV coating method according to the present invention, and to easily change various settings of the coating area, It is self-evident that it can cope with product change quickly, and it is obvious that it can be applied to non-incombustible resin product (10) which requires UV coating capable of expressing various sizes and designs and textures, so that it can be used for general purpose.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. As such, the present invention can be implemented by combining these. Accordingly, the invention is only defined by the scope of the claims set forth in the claims.

10: Noncombustible resin products 20: Digital flatbed printer
30: Fixing jig 40: UV coating layer

Claims (2)

In the UV coating method,
(a) dividing the product formed through the incombustible resin into a plurality of parts through injection molding, and molding the product into a shape to be coupled to the product;
(b) performing a surface cleaning operation on each of the divided incombustible resin products 10 with an ionizer;
(c) mounting the cleaned incombustible resin product (10) on a fixing jig (30) manufactured to correspond to the size of the nonflammable resin product formed on the flat plate of the digital flat panel printer (20);
(d) setting the injection site so that the UV coating exactly coincides with the surface of the incombustible resin product (10) through the UV curable coating liquid only in the desired coating area on the dimension of each incombustible resin product in the control computer of the digital flatbed printer step;
(e) inputting to the control computer an optimum injection amount for the non-combustible resin product (10) in the control range of the injection amount of 1 wt% to 200 wt%;
(f) ink-jet printing a UV curable coating solution on a cleaned non-combustible resin product placed on a fixing jig (30) manufactured corresponding to the size of the non-combustible resin product (10) of the digital flatbed printer (20) Forming a UV coating layer 40 for coating and patterning in a thickness of 4 to 70 microns by coating only a desired area in the digital flat panel printer 20;
(g) The nonflammable resin product 10 having the UV coating layer 40 is dried in an IR drier at a temperature of 50 to 80 캜 for 3 minutes to 10 minutes to level the surface of the UV coating layer 40 );
(h) fully curing the incombustible resin product (10) on which the UV coating layer (40) having been dried and leveled has been formed, in a dry irradiation machine under conditions of 500J (Joule) to 1000J (Joule);
(i) inspecting and packaging the dried incombustible resin product (10) with the UV coating layer (40) to produce an incombustible resin article having the UV coating layer (40) formed thereon Inkjet printing method non-flammable resin product surface UV coating method.
The method according to claim 1,
Wherein the viscosity of the UV-curable coating liquid is 7.5 s to 8 s.

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