WO2023142172A1

WO2023142172A1 - Manufacturing method and manufacturing device for fixed-point laser transfer film

Info

Publication number: WO2023142172A1
Application number: PCT/CN2022/076161
Authority: WO
Inventors: 陈海斌
Original assignee: 温岭市高宝实业有限公司
Priority date: 2022-01-26
Filing date: 2022-02-14
Publication date: 2023-08-03
Also published as: CN114454632A; CN114454632B

Abstract

A manufacturing method and manufacturing device for a fixed-point laser transfer film, relating to the technical field of laser transfer films. The problems that existing local fixed-point anti-counterfeit laser film transfer technologies are not mature, high in cost, low in production efficiency and incapable of forming formal application and large-scale production are solved. The manufacturing device is a fixed-point molding press. The fixed-point molding press comprises: a mold frame; a discharging unit (1) for feeding a base film into the fixed-point molding press; a collecting unit (2) for collecting a printing film having a laser film printed on part of the surface thereof from the fixed-point molding press to form a roll; a mold pressing roller (3) having a nickel plate with a laser effect pattern attached to the surface thereof; and a linear velocity batch adjusting mechanism, the linear velocity of a base film laser area in a mold pressing process being changed by changing the winding length of the base film, thereby implementing batch fixed-point mold pressing. The present invention has the advantages of implementing impressing of different printing points, achieving an optimal effect, and having the highest stability.

Description

A manufacturing method of a fixed-point laser transfer film and its manufacturing equipment

technical field

The invention belongs to the technical field of laser transfer film, relates to a laser transfer film, in particular to a manufacturing method and manufacturing equipment of a fixed-point laser transfer film.

Background technique

Thermal transfer film is a kind of medium material of thermal transfer printing process. The thermal transfer printing decoration process is to transfer the decorative pattern on the thermal transfer printing onto the surface of the decorated material through one-time heating and pressure of the thermal transfer printing film to form The process of high-quality finishing masks. Thermal transfer film is divided into ordinary transfer film, laser transfer film, partial aluminized film, high wear-resistant transfer film, etc., suitable for hot stamping on plastic, metal, leather, wood, glass and other materials, widely used in Printing and decoration of products and packages in daily necessities, cosmetics, toys, electrical appliances, building materials and other industries.

At present, the anti-counterfeiting marks used in plastic packaging mainly adopt self-adhesive anti-counterfeiting marks or bronzing printing anti-counterfeiting marks. Pasting self-adhesive anti-counterfeiting marks is not firm and easy to be counterfeited, while hot-stamping and printing anti-counterfeiting marks are restricted by production process and cost. and marked areas are greatly restricted. The harm of counterfeit and inferior products makes high-quality products, especially well-known products, have higher and higher anti-counterfeiting requirements. Various other anti-counterfeiting measures have also been developed in the packaging industry. Laser film anti-counterfeiting is one of the many new methods put into use. Laser film Anti-counterfeiting can also make the packaging more beautiful while anti-counterfeiting. However, the current local fixed-point anti-counterfeiting laser film transfer technology is still immature, with high costs and low production efficiency, and cannot be formally applied and scaled.

In response to the above problems, some fixed-point laser methods have appeared on the market. For example, the patent literature discloses an invention patent with the application number "CN200810060454.2" and the patent name "Laser film fixed-point transfer process". The film is used as the base material, and the printing film is obtained by using the gravure printing process for ink color printing; (2) using the gravure printing process, the transfer glue is coated at the set position of the printing film at fixed points, and the high temperature resistant glue is coated at other positions except the set position Varnish; (3) Preheat the printing film, the preheating temperature is 90-120°C, and the preheating time is 5-10s; (4) The laser film and the printing film are heat-bonded under pressure, the heat-sealing temperature is 90-130°C, and the heat-sealing pressure is 0.3 -0.6MPa; (5) Peel off the composite film, and the laser film is transferred to the position set by the printed film.

The method has many process steps and low production efficiency. According to the different anti-counterfeiting positions of the products, it is necessary to replace molded rollers of different sizes and nickel plates of different sizes, which cannot be widely used. Therefore, we urgently need a new method and its corresponding equipment. address the above deficiencies.

Contents of the invention

The object of the present invention is to solve the above-mentioned problems in the prior art, and provide a manufacturing method and equipment capable of fixed-point laser molding without changing molding rollers of different sizes.

The purpose of the present invention can be achieved through the following technical solutions:

A method for making a fixed-point laser film, comprising the following steps:

Step a: using the base material of PET or OPP as the base film;

Step b: coating a laser information layer on the base film;

Step c: performing ink color printing on the base film of step (b) through the gravure printing process to obtain a printing film, and a laser area to be molded with laser is left on the printing film;

Step d: Emboss the pattern with laser effect on the printing film by a molding machine with fixed-point function.

In the above-mentioned manufacturing method of a fixed-point laser film, when the base film is PET, a gravure coating process is used to fully coat a release agent for separating the printed pattern from the base film.

In the above method for manufacturing a fixed-point laser film, when the base film is OPP, a gravure printing process is used to coat the laser information layer.

A manufacturing equipment for a fixed-point laser transfer film, characterized in that the manufacturing equipment is a fixed-point molding machine, and the fixed-point molding machine includes a mold base;

The feeding unit sends the base film into the fixed-point molding machine;

The receiving unit collects the printed film partially printed with laser film on the surface from the fixed-point molding machine into rolls;

Embossed rollers coated with nickel plates with a laser-effect pattern;

The pressed roller approaches the embossed roller to emboss the laser pattern on the base film;

Water cooling roller, cooling the pressed roller;

Guide rollers, set in multiples, are respectively distributed at corresponding positions for the base film to go around successively;

The discharge traction roller, near the position of the discharge unit, is used to draw the base film into the fixed-point molding press for molding;

The take-up traction roller, near the position of the take-up unit, is used to pull the finished film out of the fixed-point molding machine and collect it into rolls for the take-up unit;

The pressing mechanism drives the pressed roller and the water-cooled roller to move in the direction of the molding roller;

The line speed intermittent adjustment mechanism changes the line speed of the base film laser area during the molding process by changing the detour length of the base film, realizing intermittent fixed-point molding.

In the above-mentioned fixed-point laser transfer film production equipment, the molding roll, the pressed roll and the water cooling roll are distributed in sequence.

In the above fixed-point laser transfer film production equipment, the mold frame is composed of a mold base and a side wing plate, and a plurality of guide rollers are arranged on the mold frame in an orderly manner for the base film to pass by successively.

In the above-mentioned production equipment of a fixed-point laser transfer film, the pressing mechanism includes a connecting plate connecting the pressed roller and the cooling roller, and the connecting plate is provided with a driving device to control its movement, and the driving device The movement of the connecting plate is controlled by the transmission mechanism.

In the above-mentioned fixed-point laser transfer film production equipment, the pressing mechanism further includes a driving part that forces the connecting plate to press down quickly.

In the above-mentioned fixed-point laser transfer film production equipment, the transmission mechanism is a cam intermittent transmission mechanism.

In the above-mentioned fixed-point laser transfer film production equipment, a linear guide rail for the movement of the connecting plate is provided between the connecting plate and the side wing plate.

In the above-mentioned fixed-point laser transfer film production equipment, the linear speed intermittent adjustment mechanism includes at least one swing roller component, and a transmission device that drives the swing roller component to reciprocate, and the swing roller The parts allow the base film to go around, and by changing the moving direction of the swing roller part, the relative speed of each printed point of the base film passing between the pressed roller and the molded roller is changed.

In the above-mentioned fixed-point laser transfer film production equipment, the transmission device is a synchronous belt transmission mechanism, and the number of the synchronous belt transmission mechanisms is at least one set.

In the above fixed-point laser transfer film production equipment, the linear speed intermittent adjustment mechanism further includes a drive unit for driving the transmission of the synchronous belt mechanism.

In the above-mentioned fixed-point laser transfer film production equipment, the end of the discharge traction roller is provided with a motor part 1 to control its rolling, and the end of the receiving traction roller is provided with a motor part to control its rolling two.

In the above-mentioned fixed-point laser transfer film production equipment, the fixed-point molding machine is also equipped with a PLC control system.

In the above-mentioned production equipment of fixed-point laser transfer film, a driving member for controlling its rotation is installed on the embossing roller.

Compared with the existing technology, the beneficial effects achieved by the production equipment of this fixed-point laser transfer film are as follows:

1. According to base films with different perimeter sizes, there is no need to replace the molding rollers, and the various mechanisms associated with the molding rollers. It has strong versatility. One machine can carry the pattern embossing of all base films with different perimeter sizes;

2. Adjust the movement speed of the printing point to the corresponding position through the line speed intermittent adjustment mechanism, and make full use of the definition principle of the line speed to realize the imprinting of the printing point at different distances on the base film;

3. The cam transmission mechanism is used to drive the movement of the pressed roller and the water cooling roller, which achieves the best effect and high stability.

Description of drawings

Figure 1 is a schematic side view of the fixed-point molding machine.

Fig. 2 is a three-dimensional structural schematic diagram of a fixed-point molding machine.

Figure 3 is a schematic diagram of the fixed-point molding machine.

Fig. 4 is a schematic diagram of pattern imprinting.

Fig. 5 is a schematic diagram of pattern imprinting.

In the figure, 1. Unwinding unit; 2. Receiving unit; 3. Molded roller; 4. Pressed roller; 5. Water cooling roller; 6. Guide roller; 7. Discharging traction roller; 8. Receiving traction roller ;9, mold base; 10, side wing plate; 11, connecting plate; 12, driving device; 13, transmission mechanism; 14, driving part; 15, linear guide rail; 1. Transmission shaft; 19. Moving pendulum plate; 20. Moving guide rail; 21. Driving unit; 22. Motor part one; 23. Motor part two; 24. Driving component.

Detailed ways

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

As shown in Figure 1, Figure 2, Figure 3, Figure 4, and Figure 5, the manufacturing method of this fixed-point laser film is characterized in that, comprising the following steps:

Step a: using the base material of PET or OPP as the base film;

Step b: coating a laser information layer on the base film;

In further detail, when the base film is PET, the gravure coating process is used, and the release agent is fully coated to separate the printed pattern from the base film. After the release agent is fully coated, the laser information layer is coated; It is used in the field of thermal transfer printing.

In further detail, when the base film is OPP, the gravure printing process is used to coat the laser information layer; it is applied in the field of flexible packaging.

A fixed-point laser transfer film production equipment, the production equipment is a fixed-point molding machine, the fixed-point molding machine includes a mold base;

The feeding unit sends the base film into the fixed-point molding machine;

Embossed rollers coated with nickel plates with a laser-effect pattern;

Water cooling roller, cooling the pressed roller;

Preferably, the molding roll, the pressed roll and the water cooling roll are distributed sequentially.

Preferably, the mold frame is composed of a mold base and a side wing plate, and a plurality of guide rollers are distributed on the mold frame in an orderly manner and allow the base film to go around successively.

Preferably, the pressing mechanism includes a connecting plate connecting the pressed roller and the cooling roller, and the connecting plate is provided with a driving device to control its movement, and the driving device controls the movement of the connecting plate through a transmission mechanism.

In further detail, the pressing mechanism also includes a driving part that forces the connecting plate to be pressed down quickly. When the pressed roller and the water-cooled roller are pressed and need to be returned, they may be affected by gravity and cannot be reset in time. In order not to affect the next step In the embossing step, the pressing mechanism is forcibly pulled down by the driving part, so that the pressing mechanism drives the pressed roller and the water-cooled roller to return to their positions in time.

Preferably, the transmission mechanism is a cam intermittent transmission mechanism.

Preferably, a linear guide rail for the movement of the connecting plate is provided between the connecting plate and the side wing plate.

Preferably, the line speed intermittent adjustment mechanism includes at least one swing roller component, and a transmission device that drives the swing roller component to reciprocate. The swing roller component allows the base film to go around. By changing the movement direction of the swing roller component, The relative speed of each printing point of the base film passing between the pressed roller and the embossing roller is changed.

Preferably, the transmission device is a synchronous belt transmission mechanism, and there is at least one set of synchronous belt transmission mechanisms.

In this embodiment, the number of synchronous belt transmission mechanisms is two groups, and the two groups of synchronous belt transmission mechanisms are linked through transmission shafts. The two groups of synchronous belt mechanisms are provided with reciprocating moving pendulum plates, and the pendulum roller parts are arranged on The basement membrane is passed between the two moving swing plates, and moving guide rails are arranged between the moving swing plates and the corresponding side wing plates.

Unfold the cylindrical molding roller, pave the nickel plate on its surface into a plane, and spread out the printed spots of the base film to obtain the schematic diagram shown in Figure 4. Set the molding roller to have pattern A, pattern B, Pattern C, pattern D, and pattern E, the distance between pattern A and pattern B is a, the distance between pattern B and pattern C is b, the distance between pattern C and pattern D is c, and the distance between pattern D and pattern E The distance between them is d; the printed points on the surface of the basement film are set to be printed point A, printed point B, printed point C, printed point D and printed point E, printed point A and printed point The distance of B is a1, the distance between printed point B and printed point C is b1, the distance between printed point C and printed point D is c1, and the distance between printed point D and printed point E is d1; The positions of the printing points on the base film are different, assuming that each printing point corresponds to the corresponding pattern on the embossing roller, which means that pattern A corresponds to printing point A, pattern B corresponds to printing point B, and so on.. .Then it is obtained that the distance a is equal to the distance a1, the distance b is equal to the distance b1, and so on... At this time, the driving device is pressed in from K, withdrawn from H, and works in a cycle in turn.

In addition, as shown in Figure 5, pattern A, pattern B, and pattern C are set on the embossing roller equally, the distance between pattern A and pattern B is a, and the distance between pattern B and pattern C is b; set The printing points on the surface of the basement film are respectively printing point A, printing point B and printing point C, the distance between printing point A and printing point B is a1, and the distance between printing point B and printing point C is The distance is b1, if the distance a1 is less than the distance a, the driving device will press in from point Z and exit from point Y, and slow down the process speed of the printed point B through the linear speed intermittent adjustment mechanism, so that the printed point B will be relatively reduced. At this time, the pattern B with a relatively long distance reaches this point at a constant speed, so that the printed point can be printed just; when the distance b1 is greater than the distance b, since the relative distance of b1 is relatively large, this distance can make the driving device have enough During the corresponding working time, the driving device will exit at the point Y after the last printing point is printed, and press in at the next point, that is, point X. At this time, the linear speed intermittent adjustment mechanism will speed up the process of the printing point C, Make it reach the position corresponding to the pattern C to achieve the purpose of embossing.

To sum up, base films with different distances of printing points can be embossed in this molding press equipment, without replacing a series of related mechanisms such as molding rollers, and are suitable for base films of different perimeter sizes.

In addition, the principle of the line speed intermittent adjustment mechanism is as follows:

As shown in Figure 3, the base film passes through P1 (discharging unit), P2 (discharging traction roller), P3 (swing roller component), P4 (impression point), P5 (swing roller component), P6 ( Receiving traction roller), P7 (receiving unit), when the points P3 and P5 move in the Y (right) direction, the distance from P3 to P4 will increase, and the speed to reach P4 will slow down, and the distance between the printing point and the mold press The embossing method of the pattern distance on the roller; when P3 and P5 move towards the Z (left) direction, the distance from P3 to P4 will be shortened, and the speed to P4 will be accelerated. Embossing method.

Preferably, the line speed intermittent adjustment mechanism also includes a drive unit used to drive the transmission of the synchronous belt mechanism.

Preferably, the end of the discharging traction roller is provided with a motor part 1 for controlling its rolling, and the end of the receiving traction roller is provided with a motor part 2 for controlling its rolling.

In further detail, the fixed-point molding press is also equipped with a PLC control system, through which the work of all mechanisms is controlled.

Preferably, the embossing roller is equipped with a driving member to control its rotation.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims

A method for making a fixed-point laser film, comprising the following steps:

Step a: using the base material of PET or OPP as the base film;

Step b: coating a laser information layer on the base film;

Step c: performing ink color printing on the base film of step (b) through the gravure printing process to obtain a printing film, and a laser area to be molded with laser is left on the printing film;

Step d: Emboss the pattern with laser effect on the printing film by a molding machine with fixed-point function.
The manufacturing method of a fixed-point laser film according to claim 1 is characterized in that, when the base film is PET, a gravure coating process is adopted to fully coat a release agent for printing patterns and base film break away.
The manufacturing method of a fixed-point laser film according to claim 1, wherein when the base film is OPP, a gravure printing process is used to coat the laser information layer.
A manufacturing equipment for a fixed-point laser transfer film, characterized in that the manufacturing equipment is a fixed-point molding machine, and the fixed-point molding machine includes a mold base;

The feeding unit (1) sends the base film into the fixed-point molding press;

The receiving unit (2) collects the printed film partially printed with laser film on the surface from the fixed-point molding machine into rolls;

Embossing roller (3) with a nickel plate with a laser effect pattern on the surface;

The pressed roller (4) approaches the embossing roller (3) to emboss the laser pattern on the base film;

The water cooling roller (5) carries out cooling treatment to the pressed roller (4);

The guide rollers (6) are arranged in multiples, and are respectively distributed at corresponding positions for the base film to detour through successively;

The discharge traction roller (7), near the position of the discharge unit (1), is used for drawing the base film into the fixed-point molding press for molding;

The material receiving traction roller (8), close to the material receiving unit (2), is used for the finished film to be pulled out of the fixed-point molding machine for the material receiving unit (2) to collect into rolls;

The pressing mechanism drives the pressed roller (4) and the water-cooled roller (5) to move toward the molding roller (3);

The line speed intermittent adjustment mechanism changes the line speed of the base film laser area during the molding process by changing the detour length of the base film, realizing intermittent fixed-point molding.
The manufacturing equipment of a fixed-point laser transfer film according to claim 1, characterized in that, the molding roller (3), the pressed roller (4) and the water cooling roller (5) are arranged sequentially.
The manufacture equipment of a kind of fixed-point laser transfer film according to claim 1, is characterized in that, described mold frame is made up of mold base (9) and side wing plate (10), and a plurality of described guide rollers (6) have Sequentially distributed on the formwork and for the basement membrane to bypass successively.
The production equipment of a fixed-point laser transfer film according to claim 1, wherein the lamination mechanism includes a connecting plate (11) connecting the pressed roller (4) and the cooling roller, and the connecting plate (11) is provided with a driving device (12) to control its movement, and the driving device (12) controls the movement of the connecting plate (11) through a transmission mechanism (13).
The manufacturing equipment of fixed-point laser transfer film according to claim 1, characterized in that, the pressing mechanism further includes a driving part (14) that forces the connecting plate (11) to press down rapidly.
The manufacturing equipment of fixed-point laser transfer film according to claim 1, characterized in that, the transmission mechanism (13) is a cam intermittent transmission mechanism (13).
The production equipment of a fixed-point laser transfer film according to claim 1, wherein a linear guide rail ( 15).
The manufacturing equipment of a kind of fixed-point laser transfer film according to claim 1, is characterized in that, described line speed intermittent adjustment mechanism comprises at least one swing roller part (16), and drives the swing roller part ( 16) A reciprocating transmission device, the swing roller part (16) is used for the base film to go around, and by changing the movement direction of the swing roller part (16), each printed point of the base film passes through the pressed roller (4) and the relative speed between the embossing roller (3) changes.
The production equipment of a fixed-point laser transfer film according to claim 1, wherein the transmission device is a synchronous belt transmission mechanism (17), and the number of the synchronous belt transmission mechanisms (17) is at least one set .
The manufacturing equipment of fixed-point laser transfer film according to claim 1, characterized in that, the intermittent linear speed adjustment mechanism further includes a drive unit (21) for driving the transmission of the synchronous belt mechanism.
The production equipment of a fixed-point laser transfer film according to claim 1, characterized in that, the end of the discharge traction roller (7) is provided with a motor part one (22) to control its rolling, and the retracting The end of the material traction roller (8) is provided with a motor part two (23) to control its rolling.
The manufacturing equipment of fixed-point laser transfer film according to claim 1, characterized in that, the fixed-point molding machine is also equipped with a PLC control system.
The manufacturing equipment of a fixed-point laser transfer film according to claim 1, characterized in that a driving member (24) for controlling its rotation is installed on the molding roller (3).