CN111674172A - Printing process for forming metal texture on surface of base material - Google Patents
Printing process for forming metal texture on surface of base material Download PDFInfo
- Publication number
- CN111674172A CN111674172A CN202010595814.XA CN202010595814A CN111674172A CN 111674172 A CN111674172 A CN 111674172A CN 202010595814 A CN202010595814 A CN 202010595814A CN 111674172 A CN111674172 A CN 111674172A
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- base material
- cold
- gloss oil
- area
- overprinting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/24—Inking and printing with a printer's forme combined with embossing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0081—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams
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- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a printing process for forming metal texture on the surface of a base material, which comprises the steps of introducing printing patterns, carrying out vision positioning calibration, overprinting UV gloss oil, carrying out ultraviolet irradiation curing, and carrying out cold stamping on gold foil by a cold stamping machine; the invention can better solve the problem of stretching deformation of the base material caused by overprinting by performing position correction before overprinting gloss oil by an industrial camera; meanwhile, the film pressing area of the cold-ironing process is determined by the industrial camera, so that the processing area is more reasonably planned, and the waste of raw materials is reduced; compared with the hot ironing process, the cold ironing process has the advantages that: the hot-pressing die does not need to be customized, cold ironing can be carried out at normal temperature, the efficiency is high, and raw materials are saved.
Description
Technical Field
The present invention relates to a printing process, and more particularly, to a printing process for forming a metal texture on a surface of a substrate.
Background
Carry out gloss oil chromatography at every turn on traditional substrate of undertaking, the substrate can produce tensile, leads to the position of chromatography to take place the deviation, and the chromatography effect is unsatisfactory, and cold perm membrane is whole version impression in traditional impression process, can cause a large amount of materials extravagant at the in-process of impression.
Disclosure of Invention
The present invention aims to solve at least one of the above technical problems to a certain extent. Therefore, the invention aims to provide a printing process with higher precision.
A printing process for forming metal texture on the surface of a substrate comprises the following steps,
step 1: preparing a base material printed in a traditional printing mode, and guiding the patterns to be overprinted into digital printing software, wherein four groups of cross cursors are respectively designed in the peripheral area of each group of overprinted patterns, and two groups of positioning cursors are designed in the upper left corner and the lower right corner of the base material.
Step 2: the positioning cursor is identified and positioned through an industrial camera, so that the position and the angle of the base material placed on the workbench are determined, the printing equipment is calibrated according to the position and the angle, and the alignment of the overprinting area and the starting point of the printing head is ensured.
Step 3: digitally overprinting a layer of UV gloss oil on an area needing gold stamping according to the adjusted starting point, wherein the UV gloss oil is overprinted once every time, and the action of Step2 is repeated once;
step 4: irradiating the overprinted substrate surface by using an ultraviolet lamp to cure the UV gloss oil on the substrate surface to 70-80%;
step 5: identifying and positioning the positions of the four groups of cross cursors by an industrial camera, connecting the four groups of cross cursors end to form a film pressing area, placing a cold-stamping foil on a base material, applying pressure in the film pressing area by a pressing roller of a cold-stamping machine, and stamping the cold-stamping foil on the surface of UV gloss oil to form a metal coating;
furthermore, the power of the ultraviolet lamp is 130w/cm, the irradiation time is about 0.3-0.5 seconds, and the irradiation temperature is 55-60 ℃.
Furthermore, the pressure value of the press roll in the film pressing area during film pressing is 1.3-1.4 MPa.
The invention has the beneficial effects that:
the invention can better solve the problem of stretching deformation of the base material caused by overprinting by performing position correction before overprinting gloss oil by an industrial camera; meanwhile, the embossing area of the cold-ironing process is determined by the industrial camera, so that the processing area is more reasonably planned, and the waste of raw materials is reduced; compared with the hot ironing process, the cold ironing process has the advantages that: the hot-pressing die does not need to be customized, cold-pressing can be carried out at normal temperature, the efficiency is high, and materials are saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a block diagram of a printing process for forming metallic texture on a substrate surface;
FIG. 2 is a comparison of the substrates before and after overprinting in example 1;
FIG. 3 is a schematic substrate view of Step5 in example 1;
FIG. 4 is a schematic representation of Step5 in example 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indications (such as up, down, left, right, front, back, inner and outer, center … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example 1:
a printing process for forming a metal texture on a substrate surface as shown in fig. 1 comprises the following steps,
step 1: preparing a base material printed in a traditional printing mode, and guiding the patterns to be overprinted into digital printing software, wherein four groups of cross cursors are respectively designed in the peripheral area of each group of overprinted patterns, and two groups of positioning cursors are designed in the upper left corner and the lower right corner of the base material.
The base material can be paper, plastic, wood and the like;
step 2: the positioning cursor is identified and positioned through an industrial camera, so that the position and the angle of the base material placed on the workbench are determined, the printing equipment is calibrated according to the position and the angle, and the alignment of the overprinting area and the starting point of the printing head is ensured.
Step 3: digitally overprinting a layer of UV gloss oil on an area needing gold stamping according to the adjusted starting point, wherein the UV gloss oil is overprinted once every time, and the action of Step2 is repeated once; the main components of the UV gloss oil comprise acrylic resin, an HDDA monomer, a small amount of leveling assistant, a defoaming agent and a toluene solvent; in order to ensure the evenness of gloss oil overprinting, corona treatment can be carried out on the surface of the base material, so that the affinity of the UV gloss oil to the surface is increased; in order to ensure that the surface after overprinting with the UV gloss oil has certain viscosity and the light curing speed is reduced, the addition amount of the toluene solution in the embodiment should be increased appropriately.
Step2-Step3 is described in detail with reference to fig. 2, in which a rectangle is a substrate, two sets of positioning cursors are printed on the substrate in two diagonal directions, the specific positions of the positioning cursors are at the upper left corner and the lower right corner, the positions are selected so that the substrate can be locally stretched after overprinting once, the connecting line of the upper left corner and the lower right corner can almost cover the whole surface of the substrate, and can better reflect the stretching amount of the substrate along the X axis and the Y axis to a certain extent, and after the industrial camera identifies the positions of the two sets of positioning cursors (i.e. the cross in the figure), the visual field range of the industrial camera is larger than the area size of the substrate; therefore, it can be determined according to the camera calculation that the lengths of the connecting lines of the center points of the two groups of positioning cursors and the offset angle alpha relative to the center line of the camera can be calculated, because in 16 groups of overprint areas (small square solid lines and square frames shown in fig. 3) on the base material, the base material can be stretched once each time the UV gloss oil is overprinted, the angle of the base material and the position of the next overprint point can be changed, in order to ensure the accuracy of overprint gloss oil, after each overprint of the area, the industrial camera can re-identify the center points of the two groups of cursors, wherein the rectangular area of the solid lines in the graph represents the position of the base material before overprint, the rectangular area of the dotted lines represents the position after the next overprint, the connecting lines of the centers of the two groups of positioning cursors in the rectangular area of the dotted lines are compared with the connecting lines of the two groups of positioning cursors in the rectangular area of the solid lines, the overprinting machine automatically compensates the stretching amount and the angle before overprinting gloss oil each time, so that accurate overprinting can be realized, and the error of overprinting gloss oil by the method can be controlled to be 0.01-0.05 mm.
Step 4: irradiating the overprinted substrate surface by using an ultraviolet lamp, wherein the power of the ultraviolet lamp is 130w/cm, the irradiation time is about 0.3-0.5 second, and the irradiation temperature is 55-60 ℃, so that the UV gloss oil on the substrate surface is cured to 70% -80%; in the Step5, the purpose of curing the UV varnish to 70% -80% is to increase the viscosity of the upper surface of the UV varnish on the premise of ensuring that the UV varnish has better adhesion on the base material, thereby ensuring that the cold-stamping gold foil can be perfectly adhered to the surface of the UV varnish.
Step 5: identifying and positioning the positions of the four groups of cross cursors by an industrial camera, determining a film pressing area, applying pressure in the film pressing area by a pressing roller of a cold stamping machine, and stamping a cold stamping foil on the surface of UV gloss oil to form a metal coating; further explained by combining with the figure 3, the largest rectangular area represents the substrate, 16 groups of square blocks arranged in equal distance on the substrate represent the pattern area on which the UV varnish is overprinted, the centers of the outer sides of the four sides of the pattern area are respectively designed with four groups of cross cursors, the rectangular areas of the dotted lines formed by connecting the four groups of cross cursors end to end are the film pressure area, and the area of the film pressure area is 1.2-1.5 times of that of the square blocks. Further preferably, the short side of the rectangular area with the dotted line is equal to the length of the pressing roller, the long side of the rectangular area with the dotted line is the length of each stamping of the pressing roller on the cold foil, the moving direction of the substrate on the worktable is shown as the arrow direction in fig. 4, the industrial camera positions the four groups of cross cursors positioned at the outer side of the same square block within the visual field range, so as to determine the starting point and the ending point of the pressing roller of the cold foil stamping machine, the cold foil stamping is placed between the pressing roller and the substrate, the pressing roller starts to press down at the rightmost side of the rectangular area with the dotted line according to the moving direction of the substrate shown in fig. 4, then lifts from the leftmost side, the pressure variation range of the substrate in the process is 0 → 1.4MPa to 1.4MPa → -0.15MPa, and the cold foil after the process can uniformly adhere the gold foil surface to the substrate when the pressure is applied, and is processed in this way, the cold stamping foil material except the dotted line rectangular area in the figure 3 is guaranteed not to be damaged, and the material waste is greatly reduced.
In order to protect the upper surface of the cold stamping foil from being damaged, the service life is prolonged; a layer of UV gloss oil can be overprinted on the surface of the cold stamping foil again; and then irradiating the overprinted surface by using an ultraviolet lamp, adjusting the power of the ultraviolet lamp to 150w/cm, and adjusting the irradiation time to 0.5-1.2 s, so that the UV gloss oil is completely cured on the cold-stamping gold foil surface.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A printing process for forming metal texture on the surface of a substrate is characterized by comprising the following steps,
step 1: preparing a base material printed in a traditional printing mode, and guiding the patterns to be overprinted into digital printing software, wherein four groups of cross cursors are respectively designed in the peripheral area of each group of overprinted patterns, and two groups of positioning cursors are designed in the upper left corner and the lower right corner of the base material.
Step 2: the positioning cursor is identified and positioned through an industrial camera, so that the position and the angle of the base material placed on the workbench are determined, the printing equipment is calibrated according to the position and the angle, and the alignment of the overprinting area and the starting point of the printing head is ensured.
Step 3: digitally overprinting a layer of UV gloss oil on an area needing gold stamping according to the adjusted starting point, wherein the UV gloss oil is overprinted once every time, and the action of Step2 is repeated once;
step 4: irradiating the overprinted substrate surface by using an ultraviolet lamp to cure the UV gloss oil on the substrate surface to 70-80%;
step 5: the positions of the four groups of cross cursors are identified and positioned through an industrial camera, the four groups of cross cursors are connected end to form a film pressing area, the cold-stamping foil is placed on the base material, pressure is applied to the film pressing area through a pressing roller of a cold-stamping machine, and the cold-stamping foil is stamped on the surface of the UV gloss oil so as to form a metal coating.
2. The printing process of claim 1, wherein the power of the ultraviolet lamp is 130w/cm, the irradiation time is about 0.3 to 0.5 seconds, and the irradiation temperature is 55 to 60 ℃.
3. The printing process for forming a metal texture on the surface of the substrate as claimed in claim 1, wherein the pressure value of the pressure roller during film pressing in the film pressing area is 1.3-1.4 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595814.XA CN111674172A (en) | 2020-06-24 | 2020-06-24 | Printing process for forming metal texture on surface of base material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595814.XA CN111674172A (en) | 2020-06-24 | 2020-06-24 | Printing process for forming metal texture on surface of base material |
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| CN111674172A true CN111674172A (en) | 2020-09-18 |
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| CN202010595814.XA Pending CN111674172A (en) | 2020-06-24 | 2020-06-24 | Printing process for forming metal texture on surface of base material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112123959A (en) * | 2020-09-23 | 2020-12-25 | 奥瑞金科技股份有限公司 | Metal printing method and printed matter |
| CN114454637A (en) * | 2021-12-27 | 2022-05-10 | 深圳市汉森软件有限公司 | Method, device and equipment for controlling image color register printing and storage medium |
| CN115071306A (en) * | 2022-06-24 | 2022-09-20 | 山东泰宝信息科技集团有限公司 | Metal luster digital anti-counterfeiting gasket, preparation method thereof and anti-counterfeiting method |
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| GB2277489A (en) * | 1993-04-30 | 1994-11-02 | Heidelberger Druckmasch Ag | Correction of diagonal register |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112123959A (en) * | 2020-09-23 | 2020-12-25 | 奥瑞金科技股份有限公司 | Metal printing method and printed matter |
| CN114454637A (en) * | 2021-12-27 | 2022-05-10 | 深圳市汉森软件有限公司 | Method, device and equipment for controlling image color register printing and storage medium |
| CN114454637B (en) * | 2021-12-27 | 2022-12-09 | 深圳市汉森软件有限公司 | Image color register printing control method, device, equipment and storage medium |
| CN115071306A (en) * | 2022-06-24 | 2022-09-20 | 山东泰宝信息科技集团有限公司 | Metal luster digital anti-counterfeiting gasket, preparation method thereof and anti-counterfeiting method |
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Application publication date: 20200918 |