KR102193013B1 - Foil printing method using uv ink printer - Google Patents

Abstract

The present invention relates to a method of printing a pattern on transparent glass using a UV ink printing unit, and more particularly, a printing step of inverting and printing the pattern on the back of a transparent glass (to be printed), varnish on the printed pattern. The application step of applying, the first curing step of first curing the applied varnish, the second curing step of curing the first cured varnish once again, and the foil printing step of printing the foil on the second cured varnish. Including, but consisting of 300 to 400 mw/cm 2 and 80 to 160 mw/cm 2 of light in the first and second curing steps, respectively, to improve print quality, improve the adhesion of the foil, and change the pattern to the front of the glass. It is about a method of printing patterns on transparent glass that can show a three-dimensional effect when viewed from.

Description

How to print patterns on transparent glass using UV ink printing unit{FOIL PRINTING METHOD USING UV INK PRINTER}

The present invention relates to a method of printing a pattern on transparent glass using a UV ink printing unit, and more particularly, a printing step of inverting and printing the pattern on the back of a transparent glass (to be printed), varnish on the printed pattern. The application step of applying, the first curing step of first curing the applied varnish, the second curing step of curing the first cured varnish once again, and the foil printing step of printing the foil on the second cured varnish. Including, but consisting of 300 to 400 mw/cm 2 and 80 to 160 mw/cm 2 of light in the first and second curing steps, respectively, to improve print quality, improve the adhesion of the foil, and change the pattern to the front of the glass. It relates to a method of printing a pattern on transparent glass using a UV ink printing unit that can show a three-dimensional effect when viewed from.

In general, in order to form a three-dimensional effect and gloss on ink printed matter, a gloss solution, that is, a solution generally called varnish, is applied and a method of curing it is used.

In this case, technologies including a curing device such as printers, printing machines, etc. have been proposed so that the varnish can be cured at the same time as applying the varnish without going through a separate curing process.

As such a conventional technology, there is registered patent No. 10-1000381 "Inkjet printer and printing method",

The prior art is a UVLED unit that irradiates ultraviolet rays toward a print medium supported by a support table to temporarily cure the UV ink attached to the print medium, and the amount of ultraviolet rays irradiated to the UV ink attached to the print medium by the UVLED unit. A controller that adjusts from the amount of light that temporarily cures the UV ink to the amount of light to be cured, a two-stage curing mode that temporarily cures the UV ink attached to the print medium by the UVLED unit and the controller, and then cures the UV ink at once It proposes an inkjet printer and a printing method having a control unit capable of switching the one-step curing mode to be cured by ultraviolet irradiation.

In addition, as a prior art, there is Patent Publication No. 10-2006-0009021 "Inkjet Printer Using UV Ink",

The prior art uses a UVLED or UVLED array unit as an ultraviolet light emitter of a UV irradiation means for curing the ink droplets by irradiating ultraviolet rays onto the UV ink droplets sprayed from the inkjet head and hitting the surface of the printer media mounted on the platen. , An inkjet printer using UV ink that can significantly reduce the power consumption and energy of the UV irradiation means, or to achieve a compact, lightweight, and simplified UV irradiation means.

As in the prior art, techniques for performing three-dimensional printing in order to further improve aesthetics are variously implemented in the prior art.In particular, techniques for improving aesthetics by applying a foil of gold or silver foil to such printing technology It is also presented in various ways.

As such a conventional technology, there is Registration Patent No. 10-0251398 "Method of applying gold foil to a printing layer",

In the prior art, a printing layer is formed on the printing paper, but the printing paper is a back-side paper made of oil paper, and before forming the printing layer on the printing paper, the adhesive is first printed and then printed on the top of the adhesive. A layer is formed, and before the printing layer is cured, the printing layer is covered with gold leaf as a heating roller so that the printing layer is impregnated with gold leaf, so that the gold leaf is not peeled off from the printing layer. According to this, a technique that can perform various displays by attaching a printed layer coated with gold leaf to a diary or the like is proposed.

In addition, there is registered patent No. 10-0333054 『Coating method of gold foil paper』 as a prior art.

The prior art allows the coating of the coated vinyl on the ultra-thin gold foil in a state where the release paper is in close contact, so that the gold foil can maintain its shape without being damaged or damaged in the process of coating the coated vinyl on the gold foil. It relates to a method of coating gold foil paper that enables the printing process to be carried out effectively, and this is an adhesion process in which the release paper and the gold foil paper are in close contact with each other, and the surface of the release paper and the gold foil paper is overlaid with coating vinyl to heat-fuse it. A coating method of gold foil paper is proposed in which coating vinyl can be coated on gold foil through a coating process and a separation process of separating the release paper to which the coated vinyl is fused from the vinyl coated gold foil.

However, the two conventional techniques are designed to simply attach gold or silver foil, and when pressing by applying heat to a pattern on which varnish is applied, the print is crushed by heat, resulting in deterioration of quality, or foil such as gold or silver There is a problem in that adhesion may be deteriorated because it cannot be completely adhered to.

In addition, in the prior art, as the printed surface is exposed to the outside, there is a concern that foreign substances may be adhered to the printed surface, or the foil or varnish may be worn and damaged by people touching the printed material.

Therefore, the present invention was devised to solve the above problem,

A printing step of printing UV ink on a transparent glass (to be printed), an application step of applying a varnish thereon; Including a first curing step of primarily semi-curing the applied varnish, a second curing step of secondary curing the semi-cured varnish again, and a foil printing step of impregnating the cured varnish with foil and printing, the first curing Using a UV ink printing unit that improves both print quality and adhesion by setting the amount of light of the first curing member and the amount of light of the second curing member to 300-400mw/cm2 and 80-160mw/cm2, respectively. It aims to provide a method of printing patterns on transparent glass.

In particular, the amount of light is composed of 380mw/cm2 for the first curing member and 128mw/cm2 for the second curing member, providing a method of printing a pattern on transparent glass using a UV ink printing unit that can expect the best printing result. Is another purpose.

In addition, the pattern to be printed is printed in reverse on the back of the transparent glass so that the pattern can be seen in the forward direction when viewed from the front of the transparent glass, and the pattern is printed on the transparent glass with the UV ink printing unit, which creates a three-dimensional effect by the varnish applied. It aims to provide a way to do it.

In order to achieve the above object, the method of printing a pattern on a transparent glass according to the present invention,

A printing step of spraying UV ink on the back side of the transparent substrate through an ink nozzle, and inverting and printing a pattern to be printed;

A varnish application step of applying a varnish to the pattern on which the UV ink is printed using a varnish nozzle;

A first curing step of semi-curing the varnish applied to the pattern by irradiating UV using a first curing member on the pattern to which the varnish is applied;

A second curing step of secondary curing by irradiating UV to the semi-cured varnish using a second curing member;

A foil printing step of printing a foil on a pattern by inserting the object to be printed through the second curing step into a thin printing unit;

Including,

The first curing member irradiates UV with a light amount of 300 to 400 mw/㎠, and the second curing member irradiates UV with an amount of light of 80 to 160 mw/cm 2,

The object to be printed is characterized in that it is made of transparent glass.

As described above, the method of printing a pattern on transparent glass using the UV ink printing unit according to the present invention,

Printing step of printing the pattern in reverse to transparent glass with UV ink, applying step of applying varnish to the printed pattern, first curing step of semi-curing the varnish first, second curing step of curing the semi-cured varnish secondly It consists of a step and a foil printing step of impregnating and printing a foil on the cured varnish, but at the same time, by curing the varnish in the first and second steps, the quality of the printed material is improved, and the amount of light of the first curing member in the first curing step is 300 It is composed of ~400mw/㎠, preferably 380mw/㎠, and the amount of light of the second curing member is 80~160mw/㎠, preferably 128mw/cm2, so that adhesion is improved and perfect quality printouts can be obtained. It works.

In particular, a curing unit consisting of a first curing member and a second curing member is provided so that the varnish is first hardened weakly (to the extent that it does not flow down), and overlapping varnishes can be absorbed from each other over time. Then, by completely curing it secondarily, the surface of the varnish is smooth and there is no layer inside the varnish, which has the effect of preventing defects from occurring, and to create a temporal term between the first and second curing members. This prevents the occurrence of defects by giving time for the overlapping varnishes to be absorbed between each other, and in particular, it is possible to improve both the printing quality and the adhesion to the foil by controlling the amount of light of the first and second curing members. Has an effect.

In addition, according to the present invention, as the pattern is reversed and printed on the back of the transparent glass, the pattern is correctly positioned when viewed from the front of the glass, so that the printed pattern is protected by the glass and can be prevented from being damaged. As a result, a three-dimensional effect can be formed, thereby improving an aesthetic feeling.

1 is a flow chart of a method for printing foil according to the present invention
Figure 2 is a perspective view of the printing unit of the method for printing foil according to the present invention
3 is an enlarged view of a printing unit of the method for printing foil according to the present invention
Figure 4 is an enlarged view of the printing unit of the method for printing foil according to the present invention
Figure 5 is an implementation view of a printed object of the method for printing foil according to the present invention
6 to 8 are photographs of the foil printing unit of the method for printing foil according to the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention will be described in detail in the text of the bar, implementation (態樣, aspect) (or embodiment) that can apply various changes and can have various forms. However, this is not intended to limit the present invention to a specific form of disclosure, and it should be understood that all changes, equivalents, and substitutes included in the spirit and scope of the present invention are included.

In each drawing, the same reference numerals, in particular the number of tens and ones, or the same number of tens, ones, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings The member indicated by the reference number can be identified as a member conforming to these criteria.

In addition, the components in each drawing are expressed by exaggeratingly large (or thick) or small (or thin) or simplified the size or thickness in consideration of the convenience of understanding, but this limits the scope of protection of the present invention. It shouldn't be.

The terms used in the present specification are only used to describe specific embodiments (sun, 態樣, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as ~include~ or ~consist~ are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being added.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

First, the method (M) of printing a pattern on transparent glass using the UV ink printing unit according to the present invention, as shown in FIG. 1, sprays UV ink on the back side of the printed object to print the pattern, The printing step (S1) of inverting and printing the pattern, applying the varnish to the pattern (S2), the first curing step (S3) and the second curing of sequentially curing the pattern applied with the varnish twice. It consists of a step (S4) and a foil printing step (S5) of attaching the foil to the cured varnish, so that a foil such as gold leaf or silver leaf can be more fully attached to the three-dimensionally printed pattern by the varnish.

In this case, the present invention is characterized in that the object to be printed is made of transparent glass. As the pattern is reversed and printed, when the pattern is viewed from the front of the glass, the pattern to be printed can be seen in the forward direction.

In the present specification, the foil refers to a thinly stretched metal foil such as gold foil and silver foil, and refers to that a metal thin film and a film can be separated by pressing,

In the present specification, the glass may be made of a material such as transparent acrylic or plastic, as well as transparent glass, and the scope of the rights should not be limited thereto.

In addition, the printing step (S1), the coating step (S2), the first curing step (S3), and the second curing step (S4) are performed in a UV ink printing unit, and the foil printing step (S5) is performed by a foil printing unit ( 50), each configuration and operation will be described in more detail below.

Briefly looking at the printing method of the present invention, in the printing step (S1), the pattern to be printed is reversed through UV ink and printed on the back side of the object to be printed,

Through the application step (S2), varnish is applied to form a three-dimensional effect and gloss on the printed pattern,

Through the first curing step (S3) and the second curing step (S4), the varnish is cured and the foil is impregnated with a foil (S5).

At this time, as mentioned above, until the step of curing the varnish is implemented through the UV ink printing unit, each step will be described in more detail through the structure and operation of the printing unit with reference to FIGS. 2 to 5.

UV ink printing unit (A), as shown in Figs. 2 and 3, a housing 10 provided with a printing unit 11 on which the object to be printed is placed, and front and rear along the length direction of the printing unit 11 It comprises a moving guide rod 20 and a head 30 provided on the guide rod 20 and provided with a plurality of ink nozzles 31 and varnish nozzles 33.

To describe each configuration in more detail, first, the housing 10 is provided with a printing unit 11 on which an object to be printed can be placed, and the printing unit 11 is supported under the printing unit 11 The main body 13 is provided, and guide portions 131 are formed on both sides of the main body 13 to allow the guide rod 20 to be movably coupled along the printing unit 11.

Accordingly, the guide rod 20 is configured to be moved back and forth in the longitudinal direction of the printing unit 11 along the guide unit 131 by a print command.

At this time, the print command in the present invention is configured so that the pattern is reversed and printed on the back side of the object A1 so that the pattern can be seen from the front surface of the object A1, that is, a transparent glass.

In addition, the guide rod 20 is provided with a head 30, more specifically, the guide rod 20 is provided with a head coupling portion 21 to which the head 30 can be coupled, and the The head 30 provided in the head coupling part 21 includes a plurality of ink nozzles 31 and varnish nozzles 33.

In general, the ink nozzle 31 provided in the head 30 is configured to spray color ink. In general, the color ink uses c,m,y,k colors, such as c,m,y,k Represents c (cyan), m (magenta), y (yellow), and k (black) as one of the color display models used in various printing systems including desktop publishing, and is also called YMCK in the printing industry.

Again, the head 30 is further provided with a varnish nozzle 33 in addition to the color ink nozzle 31, as described above, and varnish refers to a transparent coating agent, and prevents discoloration, scratches, mold, and staining of life. It has the effect of doing.

Therefore, through the ink nozzle 31 and the varnish nozzle 33, a printing step (S1) of printing primarily through ink is performed on the object to be printed, and a coating step of spraying the varnish according to the secondly printed pattern ( S2) is made to proceed continuously, and an ink supply unit 23 for storing the ink and varnish is formed on one side of the guide rod 20 for supplying such ink and varnish, and the nozzles It is made so that ink and varnish can be supplied to the nozzle as it is connected through the connector. In addition, since the ink supply unit 23 is separately provided, when the ink or varnish is exhausted, the ink and varnish can be quickly supplied to the ink supply unit 23 without the need to separate the head 30, so that maintenance is convenient. There is this.

The head 30 is moved in the left and right direction of the printing unit 11 along the guide rod 20. In order to facilitate this movement, the head 30 is connected to the guide rod 20 by a head connection chain ( It is connected through 25), and the head 30 can move freely due to the head connection chain 25 made of a plurality of chains.

Further, the movement of the head 30 and the guide rod 20 is operated through a separate command, which is used in a general printing apparatus A, and a detailed description thereof will be omitted.

As described above, in the case of spraying the varnish on the object to be printed, curing must be performed to prevent the varnish from flowing down. The UV ink printing unit according to the present invention is the first for curing the varnish together with the application of the varnish. It is characterized by further comprising a curing unit 40 including a curing member and a second curing member.

If the curing unit 40 is described in more detail, the curing unit 40 includes a first curing member 41 and a first curing member used in the first curing step S3 of curing the varnish. It comprises a second hardening member 43 used in the second hardening step (S4) for secondary hardening the varnish.

First, the first curing member 41 will be described, wherein the first curing member 41 is provided with a plurality of UV lamps 411, and the first curing member 41 is one side of the head 30 When provided in the head 30 is moved, it is configured to move in the same manner as the head 30. Therefore, when the varnish is sprayed through the varnish nozzle 33 provided in the head 30, the first curing member 41 provided on one side of the head 30 may first cure, so that the varnish flows. (As the head 30 moves along the guide rod 20, the first curing member 41 is positioned on the upper surface of the printing unit 11 to which the varnish is applied, and the first curing member 41 is first cured after the varnish is applied as the head 30 moves along the guide rod 20 Will proceed.)

At this time, the UV lamp 411 of the first curing member 41 is irradiated with a light amount of 300 to 400 mw/cm 2, more preferably 380 mw/cm 2, which is, when the varnish is applied, the varnish does not flow down. It is intended to improve the adhesion of the foil to be described later through repeated experiments below and at the same time to cure only to the extent that it is not, and if the wavelength or output is higher than this, the varnish may be completely cured to form a layer, and if it is weaker than this, the varnish may be It does not cure and flows down or there is a problem that the foil does not adhere.

In more detail, as shown in FIG. 5, in general, when the varnish A2 is sprayed, the head 30 repeatedly moves in the horizontal direction of the printed object A1, but the guide rod 20 gradually moves forward. It moves and sprays. At this time, the varnish A2 applied to the object to be printed is overlapped and applied multiple times.

Therefore, when the wavelength and output of the first curing member 41 is strong, the varnish applied first (the first, second, and third order of the varnish to be applied first will be arbitrarily selected in the order of application). The varnish that is cured and applied secondary or tertiary on it is not fused to the surface of the varnish applied to the primary, so that a layer is formed depending on the number of overlapping, and the wavelength and output of the primary cured member are weak. In this case, the applied varnish is not hardened and flows down to the periphery, resulting in a problem that the surface is not smooth. As a result, it is preferable that the first hardening member 41 that first hardens the varnish is slightly hardened so that the surface of the varnish does not flow down so that the overlapping varnishes can be naturally fused and not flowed down.

Again, the UV ink printing apparatus (A) according to the present invention is further provided with a second curing member 43 to cure the sprayed varnish in two steps.

In more detail, FIGS. 1 and 2 show a first embodiment of the second curing member 43, and first, the second curing member 43 is fixed to the rear of the first curing member 41 Will be provided. In more detail, the second curing member 43 cures a printed object that has been first cured, and is made of a plurality of UV lamps 431 in the same manner as the first curing member 41, and the guide rod 20 ) Is provided at the trailing end of the moving direction (printing direction). At this time, the first curing member 41 and the second curing member 43 are provided to be spaced apart from each other, and in general, the distance between the first curing member 41 and the second curing member 43 is 6cm to 8cm The interval is appropriate, and the second curing member 43 is preferably irradiated with an amount of light of 80 to 160 mw/cm 2, and more preferably, irradiated with an amount of light of 128 mw/cm 2 so that the foil described later can be more effectively attached. It is preferably made.

As described above, the reason why the second curing member 43 is separated from the first curing member 41 is, as described above, the varnish is applied by overlapping, and accordingly, a time for fusion with each other is required. If insufficient, there may be a problem that a layer is formed between each varnish. Therefore, the second curing member 43 is provided at a certain distance (preferably 6 to 8 cm) from the first curing member 41 to secure such a fusion time.

4 again shows a second embodiment of the second hardening member 43. According to the second embodiment, the second hardening member 43 is provided on the guide rod 20, more Specifically, it is provided at the rear end of the guide rod 20 in the printing direction, and is preferably provided at a predetermined distance from the guide rod 20. In addition, the second curing member 43 of the second embodiment is also made of a plurality of UV lamps 431.

As shown in the drawing, the second curing member 43 of the second embodiment is not fixed to the head 30, but is fixed to the guide rod 20, unlike the second curing member 43 of the first embodiment. As a result, the horizontal surface of the printed object is examined. That is, while the head 30 is moving in the horizontal direction, the second curing member 43 is fixed in one place to irradiate the horizontal surface of the printed object, so that the irradiation duration is longer than that of the second curing member 43 of the first embodiment. This will be done longer.

In addition, a partition wall 433 is provided at the front end of the second hardening member 43, so that the varnish A2 that is first hardened by the first hardening member 41 is removed by the second hardening member 43. Until the second curing starts, it is made so as not to be affected by UV of the second curing member 43.

In more detail, the varnish A2 applied to the printing unit 11 by the varnish nozzle 33 is overlapped and applied, and the first curing is performed by UV irradiated from the first curing member 41. . As described above, the first hardening and the second hardening are made with a time difference, and this time difference is used to form a time for the varnishes (A2) hardened by the first hardening to be fused with each other to prevent the occurrence of boundary lines, etc. (The first hardening is done so that the overlapping varnish can be fused with each other by hardening only to the extent that it does not flow down.)

However, during this time (until the second curing of the varnish begins), if the varnish is irradiated with UV of the second curing member 43, the overlapping varnish is not fused, forms a boundary, and the surface is molded so that the surface is not smooth. .

Therefore, in order to solve this problem, a partition wall 433 is formed at the front end of the second curing member 43 to prevent UV of the second curing member 43 from being irradiated to the printing area where the varnish is applied ( More specifically, the printing area before the applied varnish starts secondary curing), and when the printing unit is located under the second curing member 43 after the time for the varnish to be fused has passed, UV irradiation is performed to perform secondary curing. By proceeding, it enables curing with a smooth surface.

In addition, the printed material on which the varnish has been cured as described above is put into the foil printing unit 50 to perform the foil printing step (S5) in which the foil is attached, thereby completing printing.

When described in more detail with respect to the foil printing unit 50, the foil printing unit 50 includes a foil supply unit 511 provided with a foil, as shown in FIGS. 6 to 8, and A foil printing body 51 having a foil printing unit 513 and a foil collecting unit 515 from which foil residues are recovered, and a pressing means 53 and a foil printing unit 513 for pressing the foil on the printed object. Consists of including an elevating means for raising and lowering.

More specifically, first, the foil printing unit 50 is made of a foil printing body 51, and a foil supply unit 511 is provided on one side to supply metallic foil such as gold or silver foil. The foil supply unit 511 is made of a roller, and the foil is wound around the roller so that the foil can be fed to the foil printing unit 513. The foil fed in this way is compressed to the object to be printed by the pressing means 53 provided in the foil printing unit 513, and in more detail, the pressing means 53 has a shape of a pressing roller, and the pressing roller It is configured such that the foil is pressed and attached to the printed material as the printed material is placed between and passed through the foil printing unit 513.

Furthermore, for this purpose, the foil printing unit 513 is provided with a plurality of guide rails 517 for moving the printed material, and when the printed material is placed on the guide rail 517, the operation of the guide rail 517 As a result, the printed object passes through the lower portion of the pressing roller, so that the foil can be pressed onto the printed object.

In addition, the main body further includes a foil recovery unit 515 for recovering the foil on which the foil printing operation has been completed, and the foil recovery unit is also made of rollers to collect the foil, thereby improving collection convenience.

In addition, it is further provided with an elevating means for raising and lowering the foil printing unit 513 according to the thickness of the object to be printed, so that it can be used for various materials such as paper and plastic, but this It is the same technology as the device, and a detailed description thereof will be omitted.

In general, as a method of printing the foil on the upper surface of the varnish, a separate adhesive can be used to impregnate the foil into the object to be printed, but in order to solve the inconvenience caused by the application of the adhesive and the cost increase for additional processes, The present invention controls the hardening of the varnish so that the foil can be more reliably and stably attached to the varnish.

To this end, the present applicant sets the light amount of the first curing member to 300 to 400 mw/cm 2, more preferably 380 mw/cm 2 through various experimental examples as follows, and the light amount of the second curing member is 80 to 160 mw/cm The optimal result was confirmed by setting the amount of light in cm2, more preferably 128mw/cm2. In addition, it was carried out by setting the moving speed of the second hardening member to 200m/min in the following experimental examples.

Experimental Example 1

The experiment was conducted by setting the light amount of the first curing member to 200 mw/cm 2 and adjusting the light amount of the second curing member to 40, 80, 120, 200, 400 mw/cm 2, and confirming the print quality and adhesion.

[Table 1]

As shown in Table 1, it can be seen that the amount of light of the first curing member is low, so that the printing quality is deteriorated, such as hardening, smearing, or crushing.

Experimental Example 2.

The experiment was conducted by setting the light amount of the first curing member to 300 mw/cm 2 and the amount of light of the second curing member to 40, 80, 120, 200, 400 mw/cm 2, and confirming the print quality and adhesion.

[Table 2]

As shown in Table 2, the amount of light of the first curing member increased compared to Experimental Example 1, resulting in improved print quality, but there was still a problem of smearing, but when the amount of light of the second curing member was 120 mw/cm 2 It was confirmed that the stickiness of was improved.

Experimental Example 3.

The experiment was conducted by setting the light amount of the first curing member to 400mw/cm2 and adjusting the light amount of the second curing member to 40, 80, 120, 200, 400mw/cm2, and confirming print quality and adhesion.

[Table 3]

As shown in Table 3 above, when the light amount of the second curing member was 120mw/cm2, it was confirmed that both the print quality and the adhesion were exhibited satisfactorily. Accordingly, the applicant of the present invention more controlled the amount of each light, When the amount of light of the member was 380mw/cm2 and the amount of light of the second cured member was 128mw/cm2, it was confirmed that the print quality and adhesion were the most superior.

Experimental Example 4.

The experiment was conducted by setting the light amount of the first curing member to 600mw/cm2 and adjusting the light amount of the second curing member to 40, 80, 120, 200, 400mw/cm2, and confirming the print quality and adhesion.

[Table 4]

As shown in Table 4, it was found that the amount of light of the first curing member was high, and streaks were generated during curing, and the varnish was completely cured, so that the foil was not printed.

Experimental Example 5.

The experiment was conducted by setting the light amount of the first hardening member to 800mw/cm2 and 1000mw/cm2 and adjusting the light amount of the second hardening member to 40, 80, 120, 200, 400mw/cm2, and checking the print quality and adhesion. I did.

[Table 5]

[Table 6]

As shown in Tables 5 and 6, it was confirmed that the amount of light of the first curing member was too high to cause streaks during curing, and it was confirmed that the foil did not adhere well.

Therefore, in the present invention, through the above various experiments, the light amount of the first curing member is 300 to 400 mw/cm 2, preferably 380 mw/cm 2, and the light amount of the second curing member is 80 to 160 mw/cm 2, preferably 128 mw When it was made of /㎠, the optimal result could be confirmed.

In addition, in describing the present invention above, a method of printing a pattern on transparent glass using a UV ink printing unit having a specific shape, structure, and configuration has been described with reference to the accompanying drawings, but the present invention is variously modified by those skilled in the art. , Changes and substitutions are possible, and such modifications, changes and substitutions should be construed as belonging to the protection scope of the present invention.

M: How to print foil
A: Printing unit A1: Object to be printed
A2: varnish 10: housing
11: printing unit 13: main body
131: guide part 20: guide rod
21: head coupling portion 23: ink supply portion
25: head connection chain 30: head
31: ink nozzle 33: varnish nozzle
40: curing unit 41: first curing member
411: UV lamp 43: second hardening member
431: UV lamp 433: bulkhead
50: foil printing unit 51: foil printing body
511: foil supply unit 513: foil printing unit
515: foil recovery unit 517: guide rail
53: pressing means S1: printing step
S2: application step S3: first curing step
S4: second curing step S5: foil printing step

Claims (1)

Printing step (S1) of printing a pattern by spraying UV ink onto the transparent object (A1) through the ink nozzle (31) of the UV ink printing unit (A);
Varnish application step (S2) of applying a varnish to the pattern on which the UV ink is printed using the varnish nozzle 33 of the UV ink printing unit (A);
A first curing step (S3) of irradiating UV to the pattern on which the varnish is applied by using the first curing member 41 of the UV ink printing unit (A) to semi-cure the varnish applied to the pattern;
A second curing step (S4) of irradiating the semi-cured varnish with UV using the second curing member 43 of the UV ink printing unit to secondary cure;
A foil printing step (S6) of inserting the printed object that has passed the second curing step (S4) into the foil printing unit 50 to print the foil on the pattern;
Including,
The object to be printed is made of glass of a transparent material,
In the printing step, the pattern to be printed is reversed on the back side of the printed object and printed,

The first curing member irradiates UV with an amount of light of 380mw/cm2, and the second curing member irradiates with UV with an amount of light of 128mw/cm2,

The UV ink printing unit (A)
A housing 10 provided with a printing unit 11 on which the object to be printed is placed,
A guide rod 20 provided on the printing unit 11 and moving back and forth along the printing unit 11,
A head 30 provided on the guide rod 20 and moving in the left and right direction of the printing unit 11, and provided with a plurality of ink nozzles 31 and varnish nozzles 33,
A curing unit 40 provided on the guide rod 20 and including a first curing member 41 and a second curing member 43 for curing a printed object through a UV lamp;
Including,

The first curing member 41 is provided on one side of the head 30,
The second curing member 43 is provided on the guide rod 20 and is located behind the head 30,
A partition wall 433 is provided at the front end of the second hardening member 43
It is made so that the varnish that is first cured by the first curing member 41 is not affected by UV irradiated from the second curing member until the second curing begins,

The foil printing unit 50 is
A foil printing body 51 having a foil supply unit 511 provided with a foil, a foil printing unit 513 on which the object to be printed is placed, and a foil collecting unit 515 for recovering the foil residue, It is provided in 513, comprises a pressing means 53 for pressing the foil to the printed object and a lifting means for lifting the foil printing unit 513,
The foil supply unit 511 and the foil collection unit 515 are each composed of a roller,
The pressing means 53 is made in the form of a pressing roller, and prints the foil by pressing the object to be printed between the pressing means 53 and the foil printing unit 513,
A method for printing a pattern on transparent glass using a UV ink printing unit, characterized in that the foil printing unit 513 further includes a plurality of guide rails 517 for moving the printed unit.

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