CN118584744A - Imprinting apparatus and imprinting method - Google Patents

Abstract

The invention provides imprinting equipment and an imprinting method, wherein the imprinting equipment comprises a die, a sizing device and an imprinting assembly, the imprinting assembly comprises an alignment adjusting device, a guide roller, a compression roller and a translation roller group, a thin film belt is tensioned on one side of the die by moving the translation roller group, a first pattern on the die and a second pattern on the thin film belt are subjected to preliminary alignment, and then the relative position between the die and the thin film belt is accurately adjusted by the alignment adjusting device, so that the accurate alignment of the first pattern and the second pattern is realized; then reducing the distance between the die and the film strip to enable the film strip, the adhesive layer and the first pattern to be in contact, and rolling the film strip by using a press roller to enable the film strip, the adhesive layer and the die to be closely attached; the translation roller group moves reversely to realize film uncovering. The invention can realize UV light transfer printing of micron-level high-precision multilayer patterns on a continuous coiled material.

Description

Imprinting apparatus and imprinting method

Technical Field

The invention relates to the technical field of printing, in particular to an embossing device and an embossing method.

Background

UV transfer printing is essentially a microstructure imprinting technique with the following features: the ultra-high resolution is realized, and diffraction phenomenon in optical exposure is avoided; high fidelity, almost indiscriminate transfer of the graphic on the structural mold to the substrate; high yield, microstructural pattern parallel processing; low cost, no need of complex system of electron beam and exposure machine. The realization of high-precision positioning alignment transfer printing of a multilayer microstructure in the UV transfer printing technology is a difficulty and bottleneck of the technology.

At present, the high-precision multilayer positioning alignment microstructure transfer printing technology reported at home and abroad is generally complex in structure and only suitable for single sheet graphic transfer printing. An apparatus for batch registration of multiple layers of graphics on a continuous web, such as a reported multicolor register printing apparatus, typically has a registration accuracy of greater than 0.1mm, although continuous web registration printing may be achieved.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention aims to provide an embossing device and an embossing method, which can realize UV light transfer printing of micron-level high-precision multilayer patterns on a continuous coiled material.

A first aspect of the present disclosure provides an imprint apparatus, comprising:

a die provided with a first pattern extending from a head end to a tail end of the die;

The gluing device is used for forming a glue layer on the die and/or the film strip, and the film strip is provided with a second pattern repeatedly arranged along the length direction of the film strip;

The embossing assembly comprises an alignment adjusting device, a pressing roller and a translation roller set, wherein the pressing roller and the translation roller set can move between the head end and the tail end of the die; a translation roller set moving from a head end to a tail end to tension the film strip on one side of the mold; the alignment adjustment device is used for placing a die and adjusting the relative position between the die and the film strip so as to align the first pattern on the die with the second pattern on the film strip; the press roll moves from the head end to the tail end to press the film strip and the adhesive layer, so that the surface of the adhesive layer is printed with a structure corresponding to the first pattern; and the translation roller moves from the tail end to the head end of the die after the press roller is stamped to realize film uncovering.

Optionally, the first pattern includes a first main body and a third alignment mark, and the third alignment mark is located at a diagonal of the first main body; the second pattern comprises a second main body, a first alignment mark and a second alignment mark, wherein the first alignment mark is arranged on the periphery of the second main body, and the second alignment mark is arranged in the second main body.

Optionally, the embossing apparatus further includes:

An unreeling unit for driving the film strip to be transferred to the imprinting assembly;

A receiving unit for receiving the film strip from the embossing assembly;

the first detection device is arranged between the imprinting assembly and the material receiving unit and is used for detecting a first alignment mark of the second pattern on the film strip;

The second detection device is arranged in the die positioning platform and/or at one side of the die and is used for detecting the alignment deviation between the second alignment mark of the second pattern on the film strip and the third alignment mark of the first pattern on the die;

and the controller is used for controlling the unreeling unit and the receiving unit to stop film belt conveying when the first detection device detects the first alignment mark, and controlling the unreeling unit and the receiving unit to resume film belt conveying after the translation roller group finishes film uncovering.

Optionally, the imprinting device includes a mold positioning platform, the mold is disposed on the mold positioning platform, and the alignment adjustment device drives the mold positioning platform to move according to the alignment deviation so as to drive the mold to move.

Optionally, the translation roller set includes a first translation roller and a second translation roller, the first translation roller is located between the die and the second translation roller, the film strip tensioned on one side of the die by the first translation roller is parallel to the top surface of the die, and the first pattern is located on the top surface of the die;

the embossing assembly includes at least one press roll; when the imprinting assembly comprises a plurality of pressing rollers, the pressing rollers far away from the tail end of the die are used for positioning the film strip, and the pressing rollers near to the tail end of the die are used for sequentially or synchronously imprinting the film strip.

Optionally, the embossing assembly further includes a first guide rail, a second guide rail, a first driver and a second driver, the first guide rail and the second guide rail extend from the head end to the tail end of the die, the first driver is used for driving the first translation roller and the second translation roller to synchronously move along the first guide rail, and the second driver is used for driving the press roller to move along the first guide rail.

Optionally, the embossing apparatus further includes:

And the curing component is used for curing the adhesive layer on the film strip after being stamped by the pressing roller.

Optionally, the curing assembly includes a curing light source, a first moving rail extending from a head end to a tail end of the mold, and a driver driving the curing light source to move along the first moving rail.

Optionally, the sizing device comprises an anilox roller, and the film is sized by rotating the anilox roller; or alternatively

The glue applying device comprises a glue dispensing head, and the glue dispensing head can be used for dispensing glue on the film strip or the first pattern of the die in a sliding manner.

A second aspect of the present disclosure provides an imprinting method comprising:

in the film strip conveying process, a glue coating device forms a glue layer on a die and/or a film strip, wherein the die is provided with a first pattern, the first pattern extends from the head end to the tail end of the die, and the film strip is provided with a second pattern repeatedly arranged along the length direction of the film strip;

A translation roller set moves from the head end to the tail end of the die, and the film belt is tensioned on one side of the die;

the alignment adjustment device adjusts the relative position between the die and the film strip so as to align the first pattern on the die with the second pattern on the film strip;

The press roller extrudes the film strip and the adhesive layer to realize embossing;

And the translation roller group moves from the tail end to the head end of the die to realize film uncovering.

Optionally, before the step of removing the film from the tail end to the head end of the mold, the translating roller set further includes: and the curing component cures the adhesive layer on the film strip after being stamped by the pressing roller.

Optionally, the translating roll set moves from a head end to a tail end of the die, and before the step of tensioning the film strip on one side of the die, further comprises: the first detection device detects a first alignment mark of a second image on the film strip; when the first detection device detects the first alignment mark, the controller controls the unreeling unit and the receiving unit to stop film belt conveying;

after the step of removing the film by moving the translation roller set from the tail end to the head end of the die, the method further comprises the following steps: after the translation roller group finishes film uncovering, the controller controls the unreeling unit and the material receiving unit to recover film belt conveying.

By implementing the scheme, the method has the following beneficial effects:

The thin film strip is tensioned on one side of the die by moving the translation roller group, so that the first pattern on the die and the second pattern on the thin film strip are aligned preliminarily, then the relative position between the die and the thin film strip is accurately adjusted by the alignment adjusting device, the accurate alignment of the first pattern and the second pattern is realized, and the alignment precision is high and can reach 5-10 micrometers; then reducing the distance between the die and the film strip to enable the film strip, the adhesive layer and the first pattern to be in contact, and then rolling the film strip by using a press roller to enable the film strip, the adhesive layer and the die to be closely attached to each other, so that the imprinting precision is improved; when the film is uncovered, the translation roller group moves reversely, and the angle between the film belt and the die is kept unchanged in the moving process, so that the film uncovering force is uniform, more adhesive layers after pattern imprinting are attached to the film belt, and the phenomenon that the adhesive layers are adhered to the die can be reduced or avoided.

Drawings

FIG. 1 is a schematic view of a film strip provided in an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an imprinting apparatus provided in an embodiment of the present disclosure;

FIG. 3 is a schematic view of a structure of an imprint apparatus provided by an embodiment of the present disclosure;

FIG. 4 is a schematic view of a structure of an imprint apparatus provided by an embodiment of the present disclosure;

Fig. 5 is a schematic structural view of an imprint apparatus provided in an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a transmissive stereoscopic suspended light field imaging material provided by an embodiment of the present disclosure.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; it may be a mechanical connection that is made, or may be an electrical connection. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

Referring to fig. 2, the embossing apparatus provided in this embodiment includes an unreeling unit, a receiving unit, a film processing unit and a controller, where the unreeling unit is used for driving the film strip 100 to be transferred to the embossing assembly, the receiving unit is used for receiving the film strip 100 from the embossing assembly, the film processing unit is used for performing embossing processing on the film strip 100 transferred from the unreeling unit to the receiving unit, and the embossing processing includes alignment detection, sizing, embossing and photo-curing; the controller is respectively connected with the unreeling unit, the material receiving unit and the film processing unit in a signal manner and is used for controlling the unreeling unit, the material receiving unit and the film processing unit to cooperatively work so as to enable the imprinting equipment to realize UV light transfer printing of the micro-nano high-precision multilayer graph on the continuous coiled material.

Fig. 1 shows a schematic structure of a film strip 100 transported and processed by an embossing apparatus, referring to fig. 1, the film strip 100 has a second pattern 110 repeatedly arranged along a length direction of the film strip 100, and the second pattern 110 includes a second main body, a first alignment mark 101 and a second alignment mark 102. In one possible implementation manner, the edge of the second main body is rectangular, the micro-nano structure is arranged in the second main body in an array manner, the first alignment mark 101 is an alignment color mark arranged on the periphery of the second main body, the second alignment mark 102 is an alignment target arranged in the second main body, and the two alignment targets are respectively positioned at two opposite angles of the rectangle. The film strip 100 is a transparent film, and the second pattern 110 is observed from both the upper and lower surfaces of the film strip 100. The film strip 100 has a thickness in the range of 10um to 500um.

The film handling unit includes a die 409, a sizing device, and an embossing assembly. The top surface of the mold 409 is provided with a first pattern, the number of the first patterns is one or more, the first pattern comprises a first main body and a third alignment mark, and the third alignment mark is positioned on the opposite angle of the first main body. When a first pattern is provided on the mold, the first pattern extends from the leading end 417 to the trailing end 418 of the mold 409. When a plurality of first patterns are provided on the mold, the first patterns are uniformly spaced along the length of the mold, and the plurality of first patterns on the mold correspond to the second patterns on the film strip in a one-to-one correspondence, each first pattern being arranged from the head 417 to the tail 418 of the mold 409. The gumming device is used to form a gum layer on the mold 409 and/or the film strip 100. The embossing assembly includes an alignment adjustment device, a press roller and translation roller set 405, the press roller and translation roller set 405 being movable between a head 417 and a tail 418 of the mold 409; translating roll set 405 moves from head end 417 to tail end 418 to tension film strip 100 on one side of die 409; the alignment adjustment device is used for adjusting the relative position between the mold 409 and the film strip 100 to align the first pattern on the mold 409 with the second pattern 110 on the film strip 100, and reducing the distance between the mold 409 and the film strip 100 after the first pattern is aligned with the second pattern 110 so as to contact the film strip 100, the adhesive layer and the first pattern; the pressing roller is used for pressing the film strip 100 and the adhesive layer to realize imprinting after the film strip 100, the adhesive layer and the first pattern are contacted; the set of translation rollers 405 is configured to move from the trailing end 418 to the leading end 417 of the mold 409 to effect film removal after impression by the rollers.

In the embodiment, the translation roller set 405 is moved to tension the film strip 100 on one side of the mold 409, so that the first pattern on the mold 409 and the second pattern 110 on the film strip 100 are initially aligned, and then the relative position between the mold 409 and the film strip 100 is accurately adjusted by the alignment adjustment device, so that the accurate alignment of the first pattern and the second pattern 110 is realized, and the alignment precision is improved; then, the distance between the die 409 and the film strip 100 is reduced to enable the film strip 100, the adhesive layer and the first pattern to be in contact, and then the film strip 100 is rolled by a pressing roller to enable the film strip 100, the adhesive layer and the die 409 to be closely attached, so that the imprinting precision is improved; when the film is uncovered, the translation roller set 405 moves reversely, and the angle between the film strip 100 and the die 409 is kept unchanged in the moving process, so that the film uncovering force is uniform, more adhesive layers after pattern imprinting are attached to the film strip 100, and the phenomenon that the adhesive layers are adhered to the die 409 can be reduced or avoided.

During the transfer of the film strip 100 and during the alignment of the first pattern and the second pattern 110, the film strip 100 cannot contact the mold 409, avoiding damage to the adhesive layer or the film strip 100 due to friction between the film strip 100, the adhesive layer, and the mold 409. Therefore, the alignment adjustment device is further configured to enlarge the distance between the mold 409 and the film strip 100 after the film uncovering of the translation roller set 405 is completed, so that the film strip 100 is not contacted with the mold 409 during the conveying and alignment process.

The film processing unit further comprises a first detecting means 411 and a second detecting means 414. The first detecting device 411 is disposed between the embossing assembly and the receiving unit, and is configured to detect the first alignment mark 101 of the second pattern 110 on the film strip 100. A second detecting device 414 is disposed in the mold positioning platform 410 and/or on one side of the mold 409, for detecting a registration deviation between the second registration mark 102 of the second pattern 110 on the film strip 100 and the third registration mark of the first pattern on the mold 409. And the controller is used for controlling the unreeling unit and the receiving unit to stop the film strip 100 from being conveyed when the first detection device 411 detects the first alignment mark 101, and controlling the unreeling unit and the receiving unit to resume the film strip 100 to be conveyed after the translation roller set 405 finishes film uncovering. The first detecting means 411 and the second detecting means 414 may be cameras.

In a possible implementation, a pull roll 412 is further disposed between the set of translation rolls 405 and the receiving unit, and a first detection device 411 is disposed between the set of translation rolls 405 and the pull roll 412, for detecting a first mark on the film strip 100 stretched between the set of translation rolls 405 and the pull roll 412. The pulling roll 412 can be driven to rotate by a pulling power device, so as to finely adjust the position of the film strip 100, so that the first mark on the film strip 100 stays at a preset position, and the second pattern 110 on the film strip 100 and the first pattern on the mold 409 can be initially positioned. The traction power device is in signal connection with the controller.

The film processing unit further includes a mold positioning platform 410, the mold 409 is disposed on the mold positioning platform 410, and the alignment adjustment device drives the mold positioning platform 410 to move according to the alignment deviation detected by the second detection device 414, so as to drive the mold 409 to move. Specifically, the mold 409 may be adjusted in XYZ direction and θ angle, and in the process of adjusting the alignment of the first pattern and the second pattern 110, the alignment adjusting device drives the mold positioning platform 410 to adjust θ angle, so that the top surface of the mold 409 is parallel to the film strip 100 stretched by the translation roller set 405, then drives the mold positioning platform 410 to adjust XY direction, so that the first pattern on the mold 409 and the second pattern 110 on the film strip 100 are aligned in superposition in Z direction, and then drives the mold positioning platform 410 to move in Z direction so as to make the film strip 100, the adhesive layer and the first pattern contact.

The second detecting device 414 may be disposed above the mold 409, where the detecting portion of the second detecting device 414 faces the first pattern of the mold 409, and when the translating roll set 405 moves to tension the film strip 100 above the mold 409, the detecting portion of the second detecting device 414 faces the film strip 100, and since the film strip 100 is transparent, the second pattern 110 on the film strip 100 and the first pattern on the mold 409 can be observed at the same time, so that the alignment detection can be performed on the first pattern and the second pattern 110, as shown in fig. 3. In addition, when the mold 409 is made of a transparent material, the second detecting device 414 may be further disposed in the mold positioning platform 410, and the detecting portion of the second detecting device 414 faces the mold 409, and since both the mold 409 and the film strip 100 are transparent, the second pattern 110 on the film strip 100 and the first pattern on the mold 409 can be observed at the same time, so that the first pattern and the second pattern 110 can be detected in alignment, as shown in fig. 2, 4 and 5. The second detecting means 414 is a camera, the number of which may be one or more.

The set of translation rollers 405 comprises a first translation roller 407 and a second translation roller 406, the second translation roller 406 being positioned above the first translation roller 407 such that the film strip passing through the set of translation rollers 405 is vertical to the surface of the die 409, the initial position of the set of translation rollers 405 being at the head end 417 and the working position being at the tail end 418, the first translation roller 407 being always positioned between the die 409 and the second translation roller 406, the film strip 100 tensioned between the first translation roller 407 and the guide roller 403 being parallel to the top surface of the die 409. Thus, the mold 409 can only make XYZ-direction adjustment, but not θ -angle adjustment, so as to reduce the alignment adjustment time of the first pattern and the second pattern 110. The embossing assembly further comprises a first guide rail extending from the head end 417 to the tail end 418 of the mould 409 and a first driver in signal connection with the controller for driving the first translation roller 407 and the second translation roller 406 along the first guide rail from the head end 417 to the tail end 418 when the first detection device 411 detects the first alignment mark 101.

After the press roll is stamped, the film strip 100, the adhesive layer and the die 409 are kept in a contact state, the translation roller group 405 is used for propping the film strip 100 against the top surface of the die 409 in the process of returning the die 409 from the die 409 tail end 418 to the die 409 head end 417, the first translation roller 407 and the second translation roller 406 synchronously move, so that the angle between the film strip 100 tensioned between the first translation roller 407 and the second translation roller 406 and the film strip 100 tensioned between the guide roller 403 and the first translation roller 407 is kept unchanged, and the pulling force applied to the film strip 100 and the adhesive layer is unchanged, therefore, the adhesive layer is easier to adhere to the film strip 100, the situation that the adhesive layer remains on the die 409 can be effectively reduced and avoided, and the film uncovering is smoother and the integrity is higher.

The embossing assembly comprises one or more press rolls. When the embossing assembly comprises a press roll, a guide roll 403 may be provided on the side of the press roll 408 remote from the trailing end 418 of the die, and the film web is transported sequentially through the guide roll 403, the press roll 408 and the first translation roll 407 and then to the second translation roll 406, the guide roll 403 being held stationary, the first translation roll 407 being moved to tension the film web over the die, the press roll 408 being driven by a drive to move it between the leading and trailing ends of the die to effect embossing. When the embossing assembly comprises a plurality of rollers, the rollers remote from the trailing end of the die may be used to position the film strip, and the plurality of rollers near the trailing end of the die may be used to sequentially or synchronously emboss the film strip 100. The embossing assembly also includes a second rail extending from the head 417 to the tail 418 of the die 409 and a second driver in signal communication with the controller for driving the platen roller along the first rail after alignment of the first pattern with the second pattern 110. When a plurality of press rollers are provided to roll the film strip 100 simultaneously, the plurality of press rollers may be driven to move by the same second driver; when a plurality of press rollers are provided to sequentially roll the film strip 100, a plurality of second drivers may be configured to control each of the press rollers to move, respectively. The pressure roller applies a certain pressure to the film strip 100 to enable the film strip 100, the adhesive layer and the die 409 to be closely attached, and meanwhile, the pressure roller moves between the head end 417 and the tail end 418 of the die 409, so that bubbles among the film strip 100, the adhesive layer and the die 409 can be removed, and the combination of the film strip 100, the adhesive layer and the die 409 is tighter.

In the structures shown in fig. 2, 3 and 5, the press roll includes a press roll, i.e., a first press roll 408 in the drawing, and the film strip is stretched on one side of the mold by the guide roll 403 and the first translation roll 407, and the guide tube 403 plays a role in guiding the film strip and also plays a role in pressing one end of the film strip to position the film strip. In the structure shown in fig. 4, the pressing rollers include two pressing rollers, namely a first pressing roller 408 and a second pressing roller 415 in the drawing, the second pressing roller 415 presses one end of the film strip, the first pressing roller 408 can move between a head end 417 and a tail end 418 of the die 409, the guiding roller 403 in fig. 4 mainly plays a role in guiding the film strip, and the second pressing roller 415 plays a role in positioning the film strip to prevent the film strip from being displaced in the conveying direction during the movement of the first pressing roller 408.

The embossing apparatus further includes a curing assembly for curing the adhesive layer on the film strip 100 embossed by the pressing roller.

In one possible implementation, the curing assembly includes a curing light 404, a first moving rail extending from a head end 417 to a tail end 418 of the mold 409, and a third driver in signal communication with a controller for driving the curing light 404 along the first moving rail after the platen is finished stamping. The curing light source 404 is an ultraviolet curing light source 404, the wavelength of the light source is 325nm-440nm, and the LED curing light source 404 with the wavelength of 365nm, 395nm or 405nm can be selected in specific implementation, and can also be a mercury lamp or an electrodeless lamp.

As shown in fig. 2-3, the sizing device may include an anilox roller 402 for sizing the film strip 100 by rotating the anilox roller 402. The anilox roller 402 may be provided between the unreeling unit and the guide roller 403. In the structure shown in fig. 2, a tension roller 401 is further disposed between the unreeling unit and the guide roller 403, and an anilox roller 402 is disposed between the tension roller 401 and the guide roller 403, and the tension roller 401 and the guide roller 403 cooperate to uniformly lay the film strip 100 on one side of the anilox roller 402, so that the uniformity of sizing can be improved.

In another possible implementation, the glue applying device includes a dispensing head that is slidably mounted on the film strip 100 or on the first pattern of the mold 409, where the dispensing head may be controlled automatically or manually. The dispensing head is implemented to dispense glue on the film strip 100, and may be disposed between the unreeling unit and the guide roller 403, and the dispensing head is implemented to dispense glue on the die 409, and the dispensing head 416 may be disposed on the top surface of the die 409, as shown in fig. 5.

The unreeling unit comprises an unreeling roller 201, an unreeling driving device and a tension sensor, and the unreeling driving device and the tension sensor are in signal connection with a controller. The film strip 100 is wound on the unwinding roller 201, the unwinding driving device is used for driving the unwinding roller 201 to rotate so as to realize the unwinding of the film strip 100, the tension sensor is arranged between the unwinding roller 201 and the tension roller 401 and used for detecting the tension value of the film strip 100, and the unwinding driving device controls the unwinding roller 201 to unwind with constant tension according to the tension value detected by the tension sensor.

In one possible implementation, the receiving unit includes a receiving roller 301 and a wind-up drive, the wind-up drive being in signal connection with the controller. The receiving roller 301 is used for winding the film strip 100 after the embossing treatment, and the winding driving device drives the receiving roller 301 to rotate so as to wind the film strip 100 on the receiving roller 301, as shown in fig. 2,3 and 5. In another possible implementation, the receiving unit includes a cutting device 302, where the cutting device 302 is configured to cut the film strip 100 conveyed by the film processing unit, as shown in fig. 4.

The embodiment also provides an imprinting method, which comprises the following steps:

S101, in the conveying process of the film strip 100, a glue coating device forms a glue layer on the upper surface of a mould 409 and/or the lower surface of the film strip 100, wherein the mould 409 is provided with a first pattern, the first pattern extends from a head end 417 to a tail end 418 of the mould 409, and the film strip 100 is provided with a second pattern 110 repeatedly arranged along the length direction of the film strip 100;

S102, moving the translation roller set 405 from a head end 417 to a tail end 418 of the die 409, so that the translation roller set 405 positioned at the tail end 418 and the guide roller 403 positioned at the head end 417 tension the film strip 100 at one side of the die 409;

S103, an alignment adjustment device adjusts the relative position between the mold 409 and the film strip 100, so that the first pattern on the mold 409 and the second pattern 110 on the film strip 100 are aligned up and down, and the distance between the mold 409 and the film strip 100 is reduced after the first pattern and the second pattern 110 are aligned, so that the film strip 100, the adhesive layer and the first pattern are contacted;

S104, extruding the film strip 100 and the adhesive layer by a press roller to realize embossing;

s105, the translation roller set 405 moves from the tail end 418 to the head end 417 of the die 409 to realize film uncovering.

Step S102 may be preceded by: the first detecting device 411 detects the first alignment mark 101 of the second image on the film strip 100; when the first detecting device 411 detects the first alignment mark 101, the controller controls the unreeling unit and the receiving unit to stop the transfer of the film strip 100.

Wherein, step S103 may include: second detecting means 414 detects an alignment deviation between second alignment marks 102 of second pattern 110 on film strip 100 and third alignment marks of the first pattern on die 409; the alignment adjustment device drives the mold positioning platform 410 to move to drive the mold 409 to move according to the alignment deviation detected by the second detection device 414, so as to adjust the relative position between the mold 409 and the film strip 100.

Before step S105, the curing assembly further includes curing the adhesive layer on the film strip 100 after being embossed by the pressing roller.

Further, after step S105, the method further includes:

S106, adjusting the relative position between the die 409 and the film strip 100 by an alignment adjusting device, and expanding the distance between the die 409 and the film strip 100 so that the conveyed film strip 100 is not contacted with the die 409;

And S107, after the translation roller group 405 finishes film uncovering, the controller controls the unreeling unit and the material receiving unit to resume the conveying of the film strip 100.

For further technical details of the embossing method reference is made to the above description of the embossing device, which is not repeated here.

The imprinting apparatus and imprinting method described above may be used in the fabrication of stereoscopic suspended light field imaging material 500.

If the three-dimensional suspended light field imaging material 500 is made into a transmissive light field imaging material, the device structure is as shown in fig. 6, and the device sequentially comprises a microlens array layer 502, a base film 501 and a graphic layer 503 from top to bottom. The base film 501 has a thickness equal to the focal length of the microlens array. The graphic layer 503 is a groove graphic layer 503, and the graphic layer 503 is filled with color ink 504.

The manufacturing process flow of the device comprises the following steps:

1) The upper surface of the film strip 100 is provided with a graph-text graph layer 503, the graph-text graph layer 503 is of a groove type micro-nano structure, color ink 504 is filled in the groove, the depth of the groove is 1 um-5 um, the graph-text graph layer 503 comprises a plurality of unit graphs which are continuously arranged, and each unit graph is provided with a stepping positioning color code and a film strip alignment target. Film strip 100 is prepared as a roll.

2) A mold 409 is provided, placed over a mold positioning stage 410, the mold 409 having a microlens array on a surface. The aperture of the microlens array is between 20um and 100um, and the focusing length is determined according to the thickness of the film strip 100.

3) The upper surface of the microlens array mold or the lower surface of the film tape 100 is precisely sized to form a glue layer.

4) The first pattern of film strip 100 is run directly over microlens array mold 409 and the color patch positioning camera detects the step positioning color patch on film strip 100 and film strip 100 stops being transported.

5) The translating roll set 405 moves from head end 417 to tail end 418 to tension the film strip 100 over the die 409.

5) And the target positioning camera performs precise positioning recognition on the film strip alignment target and the die alignment target.

6) And adjusting the position of the micro lens array die through the die positioning platform according to the precise positioning recognition error until the alignment target recognition error of the target positioning camera on the two-layer graph is within an acceptable error range, so that the micro lens array corresponds to the groove position on the unit graph of the graph-text graph layer 503.

7) The press rolls imprint the film strip 100 and the curing assembly cures the imprinted glue layer.

8) The translation roller set 405 moves in the opposite direction to release the microlens array mold from the film strip 100.

9) And the material receiving unit is used for collecting finished products and cutting or winding the finished products.

The other manufacturing process flow of the device is as follows:

1) The micro-lens array layer 502 is prepared on the upper surface layer of the film strip 100, the aperture of the micro-lens array is between 20 and 100um, the focusing length is determined according to the thickness of the film strip 100, the micro-lens array layer 502 comprises a plurality of unit patterns which are arranged continuously, and each unit pattern is provided with a stepping positioning color code and a film strip alignment target. Film strip 100 is prepared as a roll.

2) And (3) according to the step positioning color code of the micro lens array layer 502, the first unit pattern of the micro lens array layer 502 is operated to be right above the graphic and text pattern mould.

3) And precisely sizing the upper surface of the graphic and text mold or the lower surface of the film strip 100 to form a glue layer.

4) And the target positioning camera performs precise positioning recognition on the graphic and graphic die alignment target and the film tape alignment target.

5) And adjusting the position of the graphic and text pattern mold through the mold positioning platform according to the precise positioning recognition error until the target positioning camera is within an acceptable error range for the alignment target recognition error of the two layers of patterns, so that the patterns on the graphic and text pattern mold correspond to the structure positions on the unit patterns of the micro lens array layer 502.

6) The press rolls imprint the film strip 100 and the curing assembly cures the imprinted glue layer.

7) The translation roller set 405 moves in a reverse direction to effect demolding of the graphic and graphic mold from the film strip 100.

8) And the material receiving unit is used for collecting finished products and cutting or winding the finished products.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (12)

1. An imprint apparatus, characterized by comprising:

a die provided with a first pattern extending from a head end to a tail end of the die;

The gluing device is used for forming a glue layer on the die and/or the film strip, and the film strip is provided with a second pattern repeatedly arranged along the length direction of the film strip;

The embossing assembly comprises an alignment adjusting device, a pressing roller and a translation roller set, wherein the pressing roller and the translation roller set can move between the head end and the tail end of the die; a translation roller set moving from a head end to a tail end to tension the film strip on one side of the mold; the alignment adjustment device is used for placing a die and adjusting the relative position between the die and the film strip so as to align the first pattern on the die with the second pattern on the film strip; the press roll moves from the head end to the tail end to press the film strip and the adhesive layer, so that the surface of the adhesive layer is printed with a structure corresponding to the first pattern; and the translation roller moves from the tail end to the head end of the die after the press roller is stamped to realize film uncovering.

2. The imprint apparatus of claim 1, wherein the first pattern includes a first body and a third alignment mark, the third alignment mark being located diagonally to the first body; the second pattern comprises a second main body, a first alignment mark and a second alignment mark, wherein the first alignment mark is arranged on the periphery of the second main body, and the second alignment mark is arranged in the second main body.

3. The embossing apparatus as set forth in claim 2, wherein the embossing apparatus further comprises:

An unreeling unit for driving the film strip to be transferred to the imprinting assembly;

A receiving unit for receiving the film strip from the embossing assembly;

the first detection device is arranged between the imprinting assembly and the material receiving unit and is used for detecting a first alignment mark of the second pattern on the film strip;

The second detection device is arranged in the die positioning platform and/or at one side of the die and is used for detecting the alignment deviation between the second alignment mark of the second pattern on the film strip and the third alignment mark of the first pattern on the die;

and the controller is used for controlling the unreeling unit and the receiving unit to stop film belt conveying when the first detection device detects the first alignment mark, and controlling the unreeling unit and the receiving unit to resume film belt conveying after the translation roller group finishes film uncovering.

4. An imprinting apparatus according to claim 3, wherein the imprinting apparatus comprises a mold positioning platform, the mold is disposed on the mold positioning platform, and the alignment adjustment device drives the mold positioning platform to move according to the alignment deviation so as to drive the mold to move.

5. The imprint apparatus according to claim 1, wherein,

The translation roller set comprises a first translation roller and a second translation roller, the first translation roller is positioned between the die and the second translation roller, a film belt tensioned on one side of the die through the first translation roller is parallel to the top surface of the die, and the first pattern is arranged on the top surface of the die;

the embossing assembly includes at least one press roll; when the imprinting assembly comprises a plurality of pressing rollers, the pressing rollers far away from the tail end of the die are used for positioning the film strip, and the pressing rollers near to the tail end of the die are used for sequentially or synchronously imprinting the film strip.

6. The imprint apparatus according to claim 5, wherein,

The embossing assembly further comprises a first guide rail, a second guide rail, a first driver and a second driver, wherein the first guide rail and the second guide rail extend from the head end to the tail end of the die, the first driver is used for driving the first translation roller and the second translation roller to synchronously move along the first guide rail, and the second driver is used for driving the pressing roller to move along the first guide rail.

7. The embossing apparatus as set forth in claim 1, wherein the embossing apparatus further comprises:

And the curing component is used for curing the adhesive layer on the film strip after being stamped by the pressing roller.

8. The imprint apparatus according to claim 7, wherein,

The curing assembly includes a curing light source, a first moving rail extending from a head end to a tail end of the mold, and a driver driving the curing light source to move along the first moving rail.

9. The imprint apparatus according to claim 1, wherein,

The sizing device comprises an anilox roller, and the film is sized by rotating the anilox roller; or alternatively

The glue applying device comprises a glue dispensing head, and the glue dispensing head can be used for dispensing glue on the film strip or the first pattern of the die in a sliding manner.

10. An embossing method, comprising:

in the film strip conveying process, a glue coating device forms a glue layer on a die and/or a film strip, wherein the die is provided with a first pattern, the first pattern extends from the head end to the tail end of the die, and the film strip is provided with a second pattern repeatedly arranged along the length direction of the film strip;

A translation roller set moves from the head end to the tail end of the die, and the film belt is tensioned on one side of the die;

the alignment adjustment device adjusts the relative position between the die and the film strip so as to align the first pattern on the die with the second pattern on the film strip;

The press roller extrudes the film strip and the adhesive layer to realize embossing;

and the translation roller group moves from the tail end to the head end of the die to realize film uncovering.

11. The method of claim 10, wherein the translating roll assembly moving from the trailing end of the mold to the leading end before the step of removing the film further comprises: and the curing component cures the adhesive layer on the film strip after being stamped by the pressing roller.

12. The method of claim 10, wherein the translating roll set moves from a head end to a tail end of the die, and wherein prior to the step of tensioning the film strip on one side of the die, further comprising: the first detection device detects a first alignment mark of a second image on the film strip; when the first detection device detects the first alignment mark, the controller controls the unreeling unit and the receiving unit to stop film belt conveying;

after the step of removing the film by moving the translation roller set from the tail end to the head end of the die, the method further comprises the following steps: after the translation roller group finishes film uncovering, the controller controls the unreeling unit and the material receiving unit to recover film belt conveying.