Method of performing foil sleeking after printing for UV inkjet printer

Abstract

A method of performing foil sleeking after printing for UV inkjet printer is disclosed, which comprises steps of: positioning a workpiece with printed patterns or words; then printing an undercoat layer on areas to be foil-sleeked of the patterns or words, then irradiate the undercoat by a UV lamp with a low irradiation intensity to allow the undercoat layer to form a viscosity; and finally sticking a foil on the undercoat layer.

Claims

1. A method of performing foil sleeking after printing for UV inkjet printer, comprising the steps of: step (a): positioning a workpiece with printed patterns or words; step (a1): printing transparent inks on areas to be foil-sleeked of the patterns or words and completely curing the transparent inks by a UV lamp to form a transparent film; step (b): printing an undercoat layer on the areas to be foil-sleeked of the patterns or words, then irradiate the undercoat by a UV lamp in a low irradiation intensity to allow the undercoat layer to form a viscosity, wherein the irradiation intensity of the UV lamp in step (b) is lower than an irradiation intensity of the UV lamp in step (a1); and step (c): sticking a foil on the undercoat layer.

2. The method of claim 1, wherein the foil is adhered onto the undercoat layer after being pressed by a pressing device.

3. The method of claim 1, wherein the undercoat is of UV inks.

4. The method of claim 2, wherein the undercoat is of UV inks.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a flowchart showing an embodiment of the present invention.

(2) FIG. 2 is a flowchart showing another embodiment of the present invention.

DETAILED DESCRIPTION

(3) Referring to FIG. 1, a method of performing foil sleeking after printing for UV inkjet printer of a preferred embodiment of the present invention is disclosed.

(4) The method of performing foil sleeking after printing for UV inkjet printer of the present invention comprises following steps: step (a): positioning a workpiece with printed patterns or words thereon; step (b): printing an undercoat layer on areas to be foil-sleeked of the patterns or words, then irradiate the undercoat by a UV lamp in a low irradiation intensity to allow the undercoat layer to form a viscosity; and step (c): sticking a foil on the undercoat layer.

(5) Wherein the foil is adhered onto the undercoat layer after being pressed by a pressing device, and the undercoat is of UV inks.

(6) Therefore, when this embodiment is implemented, since the undercoat layer on the areas to be foil-sleeked of the patterns or words is irradiated by a low light intensity of ultraviolet light emitted from the UV lamp, the undercoat layer becomes viscous to allow the foil to adhere to the undercoat layer (i.e., the areas to be foil-sleeked) without sticking onto areas other than the patterns or words on the workpiece.

(7) Further, as shown in FIG. 2, the present invention can further comprise a step (a1) between the step (a) and the step (b) of printing transparent inks on the areas to be foil-sleeked of the patterns or words and curing the transparent inks by the UV lamp. The irradiation intensity of the UV lamp in step (b) is lower than the irradiation intensity of the UV lamp in step (a1). Therefore, when this embodiment is implemented, since the transparent inks on the areas to be foil-sleeked of the patterns or words is cured by the ultraviolet light emitted from the UV lamp, a transparent film is formed by the cured transparent inks. Moreover, since irradiation intensity of the UV lamp in step (b) is lower than the irradiation intensity of the UV lamp in step (a1), the undercoat layer in step (b) can have a viscosity to allow the foil to adhere to the undercoat layer (i.e., the areas to be foil-sleeked) without sticking onto areas other than the patterns or words on the workpiece.

(8) By the design mentioned above, the undercoat layer can generate viscosity when irradiated at a low irradiation intensity and heated at a low temperature, so as to allow the foil to adhere thereon without forming a protective coating over the whole workpiece as the conventional means do. Therefore, not only the cost is lowered and the efficiency becomes higher, the present invention can effectively prevent the foil from sticking to undesired areas on the workpiece, and consequently obtain a huge improvement on the stability and precision of the procedure.

(9) The exemplary embodiments have been illustrated; however, the method of performing foil sleeking after printing for UV inkjet printer according to the present invention is not limited thereto. According to modifications or combinations of the embodiments, various types of methods of performing foil sleeking after printing for UV inkjet printer can be realized having the scope of the present invention and thus without departing from the technical spirit of the present invention.

(10) As disclosed above, the present invention indeed achieves the objectives of the present invention by providing a method of performing foil sleeking after printing for UV inkjet printer. The present invention has significant values in terms of industrial applications, and a patent application is thus filed in accordance with the law.