CN108944229B - A method for producing embossed transparent positioning printed labels - Google Patents

Abstract

The invention discloses a method for producing an embossed transparent positioning printing label, which includes the steps of preparing a cold foil film, preparing an embossed stamping plate, cold foil printing to make a label, decorating and processing the surface of the label, cutting and forming, packaging and the like. Plate alignment printing, for the hot stamping method of special plate positioning, can effectively reduce the alignment error, facilitate the alignment of cold foil, embossed stamping plate and substrate, and make the embossed pattern more fine; correspondingly, the non-embossed area of the substrate is not An excess relief pattern will be produced and no additional processing will be required. At the same time, the use of the cold stamping process can avoid high temperature damage to the relief of the substrate, preserve the integrity of the relief to the greatest extent, and facilitate subsequent deep processing. This invention is used in high-end tobacco, alcohol, cosmetics and gift fields.

Description

A method for producing embossed transparent positioning printed labels

technical field

The invention relates to the field of high-end packaging boxes for cigarettes, wine, cosmetics and gifts, in particular to a method for producing embossed transparent positioning printing labels.

Background technique

Glossary:

Crystal relief: Crystal relief technology is an intuitive anti-counterfeiting technology. It adopts crystal relief plate-making technology combined with UV molding technology to produce anti-counterfeiting packaging film, laser paper, and anti-counterfeiting labels. , High precision, especially with crystal relief effect.

Transparent label: A label whose non-patterned area is transparent.

Overprinting: Refers to the overlapping registration of graphic and text printing of various color plates during multi-color printing, that is, monochrome printing plates with different screen line angles obtained after color separation of the original, overlapping and overlapping in sequence according to the color order of the printing plates, and the final printing result is the same as that of the original. Prints with the same level and tone of the original.

Embossed embossed plate: After designing the three-dimensional embossed pattern, input it into the computer. The computer and laser equipment reproduce the three-dimensional embossed on the master plate through laser engraving. At this time, the surface of the master plate is uneven. This embossed stamping is also known as the master.

Hot stamping process: The essence is transfer printing, which is the process of transferring the pattern on the anodized aluminum (hot stamping film) to the label through the action of heat and pressure. When the printing plate heats up to a certain degree with the attached electric heating plate, it is imprinted through the anodized aluminum film and the paper, and the adhesive layer, metal aluminum layer and color layer attached to the polyester film are transferred by the action of temperature and pressure. printed on paper. As for the subdivided cold stamping process, UV glue can be applied between the substrate and the cold stamping film, and then the two pass through the UV curing device, applying appropriate light energy and pressure, and the pattern on the cold stamping film is transferred to the substrate. on things.

The cold stamping step requires the UV glue on the substrate to be aligned with the pattern on the cold stamping film, which is a difficult process.

In some label designs, the non-embossed area of the 3D laser (embossed) film needs to be made transparent. The traditional method is to do local aluminum washing after embossing aluminum plating. In this way, in addition to increasing the process cost, it also brings environmental protection. At the same time, the application scope of the above method is also limited to PET and PVC materials.

In most label designs, many manufacturers use full-plate hot stamping film printing. After these hot stamping films are used for the first time, the patterns that have not been used for the first time can also be reused. Although the cost is effectively reduced, the pattern has been Not clear enough. After years of development, the domestic positioning hot stamping device and technology have become quite mature, but it is difficult to further process the printed matter after hot stamping. Among them, this method is more suitable for mass production. When used for small batch production, the layers of the printed matter are not three-dimensional and distinct, the anti-counterfeiting function is greatly weakened, and the limitations are large. The application scheme mainly solves the problems of inaccurate positioning of different films during the hot stamping process, insufficient three-dimensional and distinct hot stamping patterns, and difficulty in deep processing of the hot stamping patterns.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method for producing high-quality, high-transparency, high-precision, green and environment-friendly positioning printing labels by using a special-plate embossed film.

The technical scheme adopted by the present invention is:

A method for producing an embossed transparent positioning printed label, which comprises the following steps:

a. The embossed plate and the cold foil have multiple patterns within one printing length; within one plate length of the embossed plate, the embossed plate is provided with a first marking interface on the left edge, and the embossed plate is in each The right edge of the pattern is provided with a second marking interface, and the embossed plate is wound on the coating roller; the pattern with the positional relationship associated with the embossed plate is made on the cold foil, within one printing length of the cold foil. , the cold foil is provided with a third marking interface on the left edge, and the cold foil is provided with a fourth marking interface on the right edge of each pattern;

b. Identify the first marking interface, each second marking interface, the third marking interface and each fourth marking interface, adjust the tensile tension of the cold foil film, and ensure that the first marking interface and the third marking interface are in the correct position by controlling the tensile tension. Align during bit printing to ensure that each second marking interface and each fourth marking interface are aligned during registration printing, reducing the repeated printing error of the embossed stamping plate and the cold foil;

c. Apply glue to the embossed molding plate, the first marking interface and the second marking interface are made into a relief pattern, and the embossed molding plate will transfer the pattern with the glue to the substrate and generate a fifth marking interface on the substrate at the same time. and each sixth marker interface;

d. The third mark interface is aligned with the fifth mark interface, and each fourth mark interface is aligned with each sixth mark interface, that is, the position of the glue on the substrate is aligned with the pattern on the cold ironing film, and the substrate is attached to the cold ironing film and then enters the cold ironing machine to complete. Cold blanching.

As an improvement of the above solution, the length of the embossed embossing plate is one printing length, and the circumference of the coating roller is equal to one printing length.

As an improvement of the above scheme, a cold foil film with a repetition error of less than 0.3mm in the printing length is used.

As an improvement of the above scheme, the glue adopts BOPP self-adhesive, and the cold ironing machine is a UV light curing machine.

As an improvement of the above scheme, step e is added after step d, and the subsequent station determines the position of the substrate by identifying the fifth mark interface and each sixth mark interface, repeats overprinting and coloring of the preliminary formed label, and finally makes the label Surface treatment.

As an improvement of the above scheme, after step e, off-line flat die-cutting, circular die-cutting or in-line die-cutting are used to cut labels, so that the position of each pattern is separated, and finally the cut labels are packaged.

As an improvement of the above scheme, the adjusting device for adjusting the stretching tension of the cold foil film includes a servo motor and a pair of shaft rollers that can adjust the film angle. The servo motor drives the shaft roller to swing to complete the angle adjustment, and the shaft roller is provided with a pressure sensor.

As an improvement of the above solution, the first marking interface, each second marking interface, the third marking interface, each fourth marking interface, the fifth marking interface, and each sixth marking interface are all electric eye color blocks, and the identification of the electric eye color blocks is recognized. The device adopts the identification electric eye.

As an improvement of the above scheme, the servo motor and the identification electric eye are connected to the computer.

Beneficial effects of the present invention: the production method utilizes full-page alignment printing, which can effectively reduce alignment errors compared with the traditional hot-stamping process of special plate positioning, facilitate the alignment of cold foil, embossed stamping plate and substrate, and make The embossed pattern on the substrate is finer; accordingly, the non-embossed area of the substrate does not produce excess embossed pattern and does not require additional processing.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

Fig. 1 is the process flow diagram of the production method;

Fig. 2 is the schematic diagram of the main production parts of cold foil, embossed stamping plate and substrate;

Figure 3 is a schematic diagram of a pattern on a substrate.

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3, the present invention is a kind of method for producing embossed transparent positioning printing label, comprising the following steps: a, prepare embossed molding plate, cold foil 1 and substrate 2:

Design cold stamping patterns. The relief pattern on the relief molding plate is protruding from the base surface of the relief molding plate. The pattern on the cold foil 1 needs to be the same and aligned as the pattern on the embossed stamping plate for proper pad printing. For Substrate 2, select PET film. Embossed molded plate, cold foil 1 and substrate 2 belong to the raw material category, which can be produced by ourselves or entrusted to other factories. Generally speaking, set the cold stamping pattern according to the customer's requirements; send the cold stamping pattern to the embossed stamping plate manufacturer and the cold stamping film manufacturer respectively, so that they can produce embossed stamping plate and cold stamping film that meet the design standards.

b, cold stamping printing label 4:

Our solution is full-page printing, that is, the pattern is printed one printing length at a time. The plate length here refers to the left-right direction of FIG. 3 .

Both the embossed embossed plate and the cold foil 1 have multiple patterns in one printing length; within one embossed length of the embossed embossed plate, the embossed embossed plate is provided with a first marking interface on the left edge, and the embossed embossed plate is provided with a first mark interface in each pattern. The right side edge is provided with the second marking interface, and the embossed embossed plate is wound on the coating shaft roller 7; on the cold foil 1, the pattern associated with the positional relationship and the embossed embossed plate is made, and a plate of the cold foil 1 is printed. In the length, the cold foil 1 is provided with a third marking interface on the left edge, and the cold foil 1 is provided with a fourth marking interface on the right edge of each pattern.

The length of the relief embossing plate is one printing length, and the circumference of the coating shaft roll 7 is equal to one printing length. In one of the embodiments, there are three different patterns in one printing length, a part of the cold foil 1 is listed in FIG. 3 , and three printing lengths are shown on the cold foil 1 . Of course, in this kind of full-page printing, each pattern within a printing length can also be made the same.

Identify the first marking interface, each second marking interface, the third marking interface and each fourth marking interface, adjust the tensile tension of the cold foil 1, and ensure that the first marking interface and the third marking interface are in alignment by controlling the tensile tension Alignment during printing, ensure that each second marking interface and each fourth marking interface are aligned during alignment printing, that is, align the pattern of the cold foil 1 and the embossed stamping plate, and reduce the repeated printing error of the embossed stamping plate and the cold stamping film 1.

Apply glue to the embossed molding plate. At this time, the first marking interface and the second marking interface on the embossed molding plate are made into embossed patterns. The embossed molding plate will transfer the pattern with the glue to the substrate 2. 2 to generate a fifth marking interface 5 and each sixth marking interface 6, that is, a fifth marking interface is printed on the first marking interface, and a sixth marking interface is printed on the second marking interface.

The third marking interface is aligned with the fifth marking interface 5, and each fourth marking interface is aligned with each sixth marking interface 6, that is, the position of the glue on the substrate 2 is aligned with the pattern on the cold foil 1, and the substrate 2 is aligned with the cold foil 1. Enter the cold ironing machine 3 to complete the cold ironing process.

c. Surface of decoration and processing label 4:

The subsequent station determines the position of the substrate 2 by identifying the fifth marking interface 5 and each sixth marking interface 6 , repeats overprinting and coloring on the preliminarily formed label 4 , and finally performs the surface treatment of the label 4 . The surface treatment here mainly refers to silk screen printing, lamination and glazing. A schematic diagram of the subsequent processing flow is not shown in FIG. 1 , but it is obvious that the overprint coloring also requires the pattern on the color roller to be aligned with the pattern on the substrate 2 .

d. Die-cutting and packaging:

The labels 4 are cut by off-line flat die-cutting, circular die-cutting or in-line die-cutting, so that the position of each pattern is separated, and finally the cut labels 4 are packaged.

As a preferred embodiment, a cold foil 1 with a repetition error within a printing length of less than 0.3 mm is used. That is, the cold foil 1 is divided according to the printing length. When the cold foil 1 of one printing length at different positions overlaps, the error of pattern alignment is less than 0.3 mm. Under this limitation, in order to align the substrate 2, the cold foil 1 is in a controllable stretching tension, and the processed pattern is very fine; the stretching tension will affect the hot stamping effect. If the repetition error is greater than 0.3mm, the cold foil 1. Greater tensile tension needs to be applied, resulting in uncontrollable pad printing process and unsightly patterns after pad printing.

As a preferred embodiment, the glue adopts BOPP self-adhesive, and the cold ironing machine 3 is a UV light curing machine. The cold blanching process belongs to the prior art, but it will not be described in detail, and an embodiment will be described below. For cold foil 1 with a thickness of 0.019mm and BOPP self-adhesive with a thickness of 0.05mm, the processing UV energy was 160W/cm ² , the speed was 60m/min, and the ambient temperature and humidity were 22°C and 65%, respectively. The glue is transparent, which can make the label more transparent and the pattern more cool.

As a preferred embodiment, the substrate 2 after applying the glue needs to be immediately attached to the cold foil 1, and the duration from coating to lamination is controlled within 0.1s.

This production method utilizes full-page alignment printing. Compared with the traditional hot stamping process of special plate positioning, it can effectively reduce the alignment error, and facilitate the alignment of the cold foil 1, the embossed stamping plate and the substrate 2, so that the substrate 2 can be aligned. The pattern is finer; accordingly, the non-embossed area of the substrate 2 will not produce redundant patterns, and no additional processing is required.

Referring specifically to FIG. 2 , the apparatus here mainly includes a releasing shaft roller 11 for releasing the cold foil 1 and a receiving shaft roller 12 for collecting the cold foil 1 after pad printing. In order to apply glue to the embossed molding plate on the coating shaft roller 7, a transition shaft roller 8 and a glue groove 9 are arranged below the coating shaft roller 7, and the transition shaft roller 8 applies the glue in the glue groove 9 to the embossed molding plate. superior.

In order to control the stretching tension of the cold foil 1, the adjusting device 13 for adjusting the tension of the foil 1 includes a servo motor and a pair of shaft rollers that can adjust the film angle. The servo motor drives the shaft rollers to swing to complete the angle adjustment. In FIG. 2 , after the adjusting device 13 is swung, the cold foil 1 can be slightly tightened, so as to realize fine adjustment of the stretching tension. Accordingly, a high-precision pressure sensor needs to be provided on the adjusting device 13 . Still another method is that the servo motor directly controls the release shaft roller 11 to adjust the stretching tension.

The first marking interface, each second marking interface, the third marking interface, each fourth marking interface, the fifth marking interface 5, and each sixth marking interface 6 are all electric eye color blocks, and the identification device 10 for identifying the electric eye color blocks adopts the identification Electric eye. In Fig. 2, an identification sensor has multiple monitoring angles.

The servo motor and the identification electric eye are connected to the computer. Identify the electric eye and the pressure sensor as the input end of the signal, the computer obtains the positional relationship between the cold foil 1 and the substrate 2 through mathematical conversion, and then drives the servo motor to run to adjust the tensile tension of the cold foil 1.

Of course, the design creation is not limited to the above-mentioned embodiments, and the combination of different features of the above-mentioned embodiments can also achieve good effects. Those skilled in the art can also make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present application.

Claims (8)

1. a method for producing embossed transparent positioning printing label, prepare embossed embossed plate, cold foil (1) and substrate (2), there are mutually aligned patterns on the embossed embossed plate and cold foil (1), it is characterized in that Include the following steps: a. The embossed stamping plate and the cold foil (1) have multiple patterns in one printing length; in one printing length of the embossed stamping plate, the embossed stamping plate is provided with a first mark interface on the left edge, and the embossed stamping plate is A second marking interface is arranged on the right edge of each pattern, and the embossed embossed plate is wound on the coating roller (7). The length of the embossed embossing plate is one printing length. The circumference is equal to one printing length; within one printing length of the cold foil (1), the cold foil (1) is provided with a third marking interface on the left edge, and the cold foil (1) is provided on the right edge of each pattern the fourth marker interface; b. Identify the first marking interface, each second marking interface, the third marking interface and each fourth marking interface, adjust the tensile tension of the cold foil (1), and ensure the first marking interface and the third marking by controlling the tensile tension The interfaces are aligned during alignment printing, ensuring that each second marking interface and each fourth marking interface are aligned during alignment printing, reducing the repeated printing errors of the embossed molding plate and the cold foil (1); c. Apply glue to the embossed molding plate, the first marking interface and the second marking interface are made into an embossed pattern, and the embossed molding plate will transfer the pattern with the glue to the substrate (2) at the same time on the substrate (2) generating a fifth marker interface (5) and each sixth marker interface (6); d, the third mark interface is aligned with the fifth mark interface (5), and each fourth mark interface is aligned with each sixth mark interface (6), that is, the position of the glue on the substrate (2) is aligned with the pattern on the cold foil (1), After the substrate (2) is attached to the cold foil (1), it enters the cold foil machine (3) at the same time to complete the foil process. 2. The method for producing an embossed transparent positioning printed label according to claim 1, wherein a cold foil (1) with a repetition error of less than 0.3 mm in a printing length is used. 3. The method for producing embossed transparent positioning printing labels according to claim 2, characterized in that: the glue adopts BOPP self-adhesive, and the cold ironing machine (3) is a UV light curing machine. 4. the method for producing embossed transparent positioning printing label according to claim 1, is characterized in that: after described step d, add step e, follow-up station is by identifying the 5th mark interface (5) and each 6th mark interface ( 6) to determine the position of the substrate (2), repeat overprinting and coloring of the preliminarily formed label (4), and finally do the surface treatment of the label (4). 5. The method for producing embossed transparent positioning printed labels according to claim 4, characterized in that: after the step e, off-line flat die-cutting, circular die-cutting or in-line die-cutting are used to slit the labels (4), so that each label (4) is cut. The position where each pattern is located is separated, and finally the slitted label (4) is packaged. 6. The method for producing embossed transparent positioning printed labels according to any one of claims 1 to 5, wherein the adjusting device (13) for adjusting the stretching tension of the cold foil (1) comprises a servo motor and a pair of The shaft roller with adjustable film angle, the servo motor drives the shaft roller to swing to complete the angle adjustment, and there is a pressure sensor on the shaft roller. 7. The method for producing embossed transparent positioning printed labels according to claim 6, characterized in that: the first marking interface, each second marking interface, the third marking interface, each fourth marking interface, the fifth marking interface (5 ), each sixth marking interface (6) is an electric eye color block, and the identification device (10) for identifying the electric eye color block adopts an identification electric eye. 8. The method for producing embossed transparent positioning printed labels according to claim 7, wherein the servo motor and the identification electric eye are connected to the computer.

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