CN110834459A - Intermittent micro-structure embossing device and embossing method thereof - Google Patents

Abstract

The invention relates to an intermittent micro-structure imprinting device and an imprinting method thereof, which comprise a hot-pressing roller for hot pressing, the opposite side of the hot-pressing roller is provided with a mould roller which is driven by a driving device and is arranged on a movable frame, the moving frame drives the hot pressing roller to move or move away through the displacement device, and the driving device and the displacement device are both connected with the controller, the invention controls the die roller to intermittently perform rolling printing by adding the moving frame and the displacement device to the die roller, avoids the part without die coverage, the micro-structures on the light guide film at the embossed position are coherent, no waste transition section is arranged in the middle, the light guide film is directly cut and used independently, a large amount of light guide films can be saved in one year, the production cost is saved, and the invention can be suitable for more micro-structures because of coherent printing.

Description

Intermittent micro-structure embossing device and embossing method thereof

Technical Field

The invention relates to an intermittent micro-structure embossing device and an embossing method thereof, belonging to the technical field of hot embossing.

Background

The backlight module is an important component of a liquid crystal display, and the most critical part in the whole backlight module is a light guide plate or a light guide film, which has the function of guiding the advancing direction of light rays, changing a linear light source or a point light source into a uniform surface light source, so that a high-quality display picture can be obtained, the uniformity of light emitted by a backlight source is very important, and the light guide performance of the light guide film mainly depends on the shape and distribution of a microstructure on the surface.

The preparation technique of leaded light membrane is along with the appearance of novel leaded light micro-structure and constantly develops, the mould roller that adopts the micro-structure among the prior art carries out rolling formula impression to the leaded light membrane, in the course of working, the mould roller is the rotatory impression leaded light membrane that keeps constant all the time, but because the mould can not seamlessly install on the mould roller, it does not have the mould to cover to lead to having one section on the mould roller, the leaded light membrane micro-structure of production also is one section, when later stage uses, need not have the part that the impression arrived to cut out in the middle of the centre, not only once cut out technology more, and the leaded light membrane cost of annual waste is very huge.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the problems, the intermittent microstructure imprinting device and the imprinting method thereof are provided, which can improve the use efficiency of the light guide film and save the cost.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides an intermittent type formula microstructural imprinting device, is including the hot press roll that is used for the hot pressing, the opposite side of hot press roll is provided with the mould roller, the mould roller is through driving the device drive that changes, the mould roller is installed on removing the frame, it removes or keeps away from to the hot press roll through the displacement device drive to remove the frame, it all is connected with the controller to drive to change device and displacement device.

Preferably, the front end of the mold roller is further provided with a film tearing machine, and the light guide film after film tearing enters the mold roller after passing through the first tensioning roller.

Preferably, a laminating machine is arranged on the rear side of the hot-pressing roller, and a second tensioning roller is further arranged between the laminating machine and the hot-pressing roller.

Preferably, the film torn off from the light guide film by the film tearing machine is conveyed to the film laminating machine through a plurality of positioning rollers, and the film laminating machine is used for laminating the film torn off by the film tearing machine on the light guide film.

Preferably, be provided with two registration rollers between dyestripping machine and the laminating machine, be first registration roller and second registration roller respectively, still be provided with the third tensioning roller between second registration roller and the laminating machine.

Preferably, the displacement device comprises a driving cylinder and a multi-connecting rod pushed by the driving cylinder, and the top end of the multi-connecting rod is connected with the moving frame.

An embossing method using the above-described intermittent microstructure embossing apparatus, comprising the steps of:

(1) after the mold roller is close to the hot pressing roller to reach a processing position, rotationally impressing the mold roller for an angle of one mold, and stopping;

(2) the displacement device drives the moving frame and the die roller to be far away from the hot pressing roller, and the die roller rotates through an angle without die coverage;

(3) and (3) the mould roller is driven by the displacement device to approach the hot pressing roller again to circulate the operations of the steps (1) to (2).

The invention has the beneficial effects that: the invention controls the intermittent rolling printing of the mold roller by adding the movable frame and the displacement device to the mold roller, avoids the part without mold coverage, ensures that the microstructures on the light guide film at the imprinting position are coherent, has no waste transition section in the middle, is directly cut and used independently, can save a large amount of light guide films in one year, saves the production cost, and can be suitable for more microstructures because of coherent printing.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic block diagram of one embodiment of the present invention;

FIG. 2 is a flow chart of one embodiment of an imprinting method of the present invention.

The labels in the figure are: 1-mold roller, 2-hot pressing roller, 3-moving frame, 4-displacement device, 5-driving cylinder, 6-multi-connecting rod, 7-light guide film, 8-film, 9-first tensioning roller, 10-first positioning roller, 11-second positioning roller, 12-third tensioning roller, 13-laminating machine, 14-film tearing machine and 15-second tensioning roller.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

Example 1

The intermittent microstructure imprinting device of the present invention as shown in fig. 1 comprises a hot-pressing roller 2 for hot-pressing, wherein the hot-pressing roller 2 is fixedly installed by other frames without moving, a mold roller 1 is arranged on the opposite side of the hot-pressing roller 2, the mold roller 1 is driven by a driving device, the driving device is a conventional driving device, such as a servo motor, the mold roller 1 is installed on a moving frame 3, the mold roller 1 can rotate on the moving frame 3, the moving frame 3 is driven by a displacement device 4 to move towards or away from the hot-pressing roller 2, the displacement device 4 can be a cylinder or a connecting rod, or can be a screw rod or a slide rail, the driving device and the displacement device 4 are both connected with a controller, the controller controls the rotation and stop of the driving device, and also controls the movement and stop of the displacement device 4, the present controller is preferably an industrial controller, which controls the driving means and the displacement means 4 by means of a start or stop function that the industrial controller has.

According to the invention, the moving frame 3 and the displacement device 4 are added to the mold roller 1 to control the mold roller 1 to intermittently perform rolling printing, so that the part without mold coverage is avoided, the microstructures on the light guide film 7 at the imprinting position are coherent, no waste transition section is arranged in the middle, the microstructures are directly cut and used independently, a large amount of light guide films 7 can be saved in one year, the production cost is saved, and the invention can be suitable for more microstructures because of coherent printing.

In a preferred embodiment, a film tearing machine 14 is further disposed at the front end of the mold roller 1, the light guide film 7 after being torn passes through a first tensioning roller 9 and then enters the mold roller 1, and the first tensioning roller 9 is used for raising the tension of the light guide film 7 before entering the mold roller 1.

In a preferred embodiment, a film laminating machine 13 is arranged at the rear side of the hot pressing roller 2, a second tensioning roller 15 is further arranged between the film laminating machine 13 and the hot pressing roller 2, the second tensioning roller 15 is also used for raising tension, in the above embodiment, the film torn by the film tearing machine 14 can be separately disposed, and then a new film is laminated on the film laminating machine 13.

Example 2

On the basis of the above embodiment, the film 8 torn off from the light guide film 7 by the film tearing machine 14 is conveyed to the film laminating machine 13 through the plurality of positioning rollers, and the film 8 torn off by the film tearing machine 14 is attached to the light guide film 7 by the film laminating machine 13.

In a preferred embodiment, two positioning rollers are arranged between the film tearing machine 14 and the film laminating machine 13, namely a first positioning roller 10 and a second positioning roller 11, a third tensioning roller 12 is further arranged between the second positioning roller 11 and the film laminating machine 13, and the third tensioning roller 12 is used for raising tension before the film 8 enters the film laminating machine 13, so that the flatness of the film is ensured.

In a preferred embodiment, the displacement device 4 includes a driving cylinder 5 and a multi-link 6 pushed by the driving cylinder 5, the multi-link 6 is a three-link in this embodiment, the top end of the multi-link 6 is connected to the moving frame 3, and the driving manner by the driving cylinder 5 and the multi-link 6 is one of the driving manners in this embodiment, but is not limited thereto.

Example 3

An embossing method using the above-described intermittent microstructure embossing apparatus, as shown in fig. 2, includes the steps of:

(1) after the mold roller 1 approaches the hot pressing roller 2 to a processing position, the processing position is the distance between the mold roller 1 and the hot pressing roller 2 during normal processing, and the distance stops after the mold roller 1 and the hot pressing roller 2 rotate and imprint a mold angle, so that the waste of the material of the light guide film 7 on the part of the mold roller 1 not covered by the mold is avoided;

(2) the displacement device 4 drives the moving frame 3 and the die roller 1 to be far away from the hot pressing roller 2, the die roller 1 rotates through an angle without die coverage, and returns to the starting position of the die for starting printing after idling;

(3) the mould roller 1 is driven by the displacement device 4 to approach the hot-press roller 2 again to circulate the operation of the step 1-2, and the method only imprints the position from the starting point to the end point of the mould.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (7)

1. The utility model provides an intermittent type formula microstructural imprinting device, its characterized in that, is including the hot press roll that is used for the hot pressing, the opposite side of hot press roll is provided with the mould roller, the mould roller drives through drive commentaries on classics device, the mould roller is installed on removing the frame, remove the frame and pass through the displacement device drive and move or keep away from to the hot press roller, drive commentaries on classics device and displacement device and all be connected with the controller.

2. The intermittent microstructure imprinting apparatus of claim 1, wherein a film tearing machine is further disposed at a front end of the mold roller, and the light guiding film after being torn passes through the first tension roller and then enters the mold roller.

3. A batch-type microstructure embossing apparatus as claimed in claim 2, wherein a laminator is provided on a rear side of the hot-press roll, and a second tension roll is further provided between the laminator and the hot-press roll.

4. An intermittent microstructure imprinting apparatus according to claim 3, wherein the film torn by the film tearing machine from the light guide film is transferred to the film laminating machine via a plurality of positioning rollers, and the film laminating machine is configured to apply the film torn by the film tearing machine to the light guide film.

5. An intermittent microstructure embossing apparatus as claimed in claim 4, wherein two positioning rollers are provided between the film tearing machine and the film laminating machine, respectively a first positioning roller and a second positioning roller, and a third tensioning roller is provided between the second positioning roller and the film laminating machine.

6. An intermittent microstructure-embossing apparatus as claimed in claims 1 to 5, wherein said displacement means comprises a driving cylinder and a multi-link rod pushed by said driving cylinder, the top end of said multi-link rod being connected to said moving frame.

7. An embossing method using the intermittent microstructure embossing apparatus of any one of claims 1 to 6, comprising the steps of:

(1) after the mold roller is close to the hot pressing roller to reach a processing position, rotationally impressing the mold roller for an angle of one mold, and stopping;

(2) the displacement device drives the moving frame and the die roller to be far away from the hot pressing roller, and the die roller rotates through an angle without die coverage;

(3) and (3) the mould roller is driven by the displacement device to approach the hot pressing roller again to circulate the operations of the steps (1) to (2).

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