CN118584744A - Imprinting equipment and imprinting method - Google Patents

Abstract

The present invention provides an embossing device and an embossing method, the embossing device comprises a mold, a gluing device and an embossing assembly, the embossing assembly comprises an alignment adjustment device, a guide roller, a pressure roller and a translation roller group, the film strip is stretched on one side of the mold by moving the translation roller group, so that the first pattern on the mold and the second pattern on the film strip are preliminarily aligned, and then the relative position between the mold and the film strip is accurately adjusted by the alignment adjustment device to achieve accurate alignment of the first pattern and the second pattern; then the distance between the mold and the film strip is reduced to make the film strip, the glue layer and the first pattern contact, and the film strip is rolled by the pressure roller to make the film strip, the glue layer and the mold fit tightly; the translation roller group moves in the opposite direction to realize film peeling. The present invention can realize UV light transfer of micron-level high-precision multi-layer graphics on continuous coils.

Description

Imprinting equipment and imprinting method

Technical Field

The present invention relates to the field of printing technology, and in particular to an imprinting device and an imprinting method.

Background Art

UV transfer is essentially a microstructure imprinting technology with the following characteristics: ultra-high resolution without diffraction in optical exposure; high fidelity, almost indiscriminate transfer of the pattern on the structure mold to the substrate; high yield, parallel processing of microstructure patterns; low cost, no need for complex systems such as electron beams and exposure machines. The difficulty and bottleneck of UV transfer technology is to achieve high-precision positioning and alignment transfer of multi-layer microstructures.

At present, the high-precision multi-layer positioning and alignment microstructure transfer technology reported at home and abroad is generally complex in structure and only suitable for transferring graphics on single sheets. Equipment that realizes batch registration of multi-layer graphics on continuous rolls, such as the reported multi-color positioning printing equipment, can achieve continuous registration printing of rolls, but the registration accuracy is generally greater than 0.1mm.

Summary of the invention

In view of the shortcomings of the prior art, the object of the present invention is to provide an embossing device and an embossing method, which can realize UV light transfer of micron-level high-precision multi-layer graphics on a continuous web.

A first aspect of the present disclosure provides an imprinting device, comprising:

A mold is provided with a first pattern, wherein the first pattern extends from a head end to a tail end of the mold;

a gluing device, used for forming a glue layer on the mold and/or the film strip, wherein the film strip has a second pattern repeatedly arranged along the length direction of the film strip;

The embossing assembly includes a positioning adjustment device, a pressure roller and a translation roller group, wherein the pressure roller and the translation roller group can move between the head end and the tail end of the mold; the translation roller group moves from the head end to the tail end to tension the film strip on one side of the mold; the positioning adjustment device is used to place the mold and adjust the relative position between the mold and the film strip so that the first pattern on the mold is aligned with the second pattern on the film strip; the pressure roller moves from the head end to the tail end to apply pressure to the film strip and the adhesive layer so that the surface of the adhesive layer is embossed with a structure corresponding to the first pattern; after the pressure roller is embossed, the translation roller moves from the tail end to the head end of the mold to realize film peeling.

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

Optionally, the imprinting device further comprises:

An unwinding unit, used for driving the film strip to be conveyed toward the stamping assembly;

A receiving unit, used for receiving the film strip from the stamping assembly;

A first detection device, disposed between the stamping assembly and the material receiving unit, for detecting a first alignment mark of a second pattern on the film tape;

A second detection device, disposed in the mold positioning platform and/or on one side of the mold, for detecting an alignment deviation between a second alignment mark of the second pattern on the film tape and a third alignment mark of the first pattern on the mold;

The controller is used to control the unwinding unit and the receiving unit to stop the film strip transmission when the first detection device detects the first alignment mark, and to control the unwinding unit and the receiving unit to resume the film strip transmission after the translation roller group completes film peeling.

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

Optionally, the translation roller group includes a first translation roller and a second translation roller, the first translation roller is located between the mold and the second translation roller, the film belt stretched on one side of the mold by the first translation roller is parallel to the top surface of the mold, and the first pattern is provided on the top surface of the mold;

The stamping assembly includes at least one stamping roller; when the stamping assembly includes multiple stamping rollers, the stamping roller away from the tail end of the mold is used to position the film strip, and the stamping roller close to the tail end of the mold stamps the film strip sequentially or synchronously.

Optionally, the stamping assembly also 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 mold, the first driver is used to drive the first translation roller and the second translation roller to move synchronously along the first guide rail, and the second driver is used to drive the pressing roller to move along the first guide rail.

Optionally, the imprinting device further comprises:

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

Optionally, the curing assembly includes a curing light source, a first movable guide rail and a driver, wherein the first movable guide rail extends from the head end to the tail end of the mold, and the driver drives the curing light source to move along the first movable guide rail.

Optionally, the gluing device comprises an anilox roller, and the film strip is glued by rotating the anilox roller; or

The glue applying device comprises a glue dispensing head, and the glue dispensing head can slidably dispense glue on the film tape or the first pattern of the mold.

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

During the film tape conveying process, the gluing device forms a glue layer on the mold and/or the film tape, the mold is provided with a first pattern, the first pattern extends from the head end to the tail end of the mold, and the film tape has a second pattern repeatedly arranged along the length direction of the film tape;

The translation roller group moves from the head end to the tail end of the mold to tension the film belt on one side of the mold;

The alignment adjustment device adjusts the relative position between the mold and the film tape so that the first pattern on the mold and the second pattern on the film tape are aligned;

The pressing roller squeezes the film strip and the adhesive layer to achieve embossing;

The translation roller group moves from the tail end to the head end of the mold to realize film peeling.

Optionally, before the translation roller group moves from the tail end to the head end of the mold to realize the film peeling step, it also includes: a curing component curing the glue layer on the film strip that is embossed by the pressing roller.

Optionally, before the step of moving the translation roller group from the head end to the tail end of the mold to tighten the film strip on one side of the mold, the step further includes: a first detection device detecting a first alignment mark of the second image on the film strip; when the first detection device detects the first alignment mark, a controller controls the unwinding unit and the receiving unit to stop conveying the film strip;

After the translation roller group moves from the tail end to the head end of the mold to realize the step of peeling off the film, it also includes: after the translation roller group completes the film peeling, the controller controls the unwinding unit and the receiving unit to resume the film strip transmission.

The implementation of the above scheme has the following beneficial effects:

The film strip is stretched on one side of the mold by moving the translation roller group, so that the first pattern on the mold and the second pattern on the film strip are preliminarily aligned, and then the relative position between the mold and the film strip is accurately adjusted by the alignment adjustment device to achieve accurate alignment of the first pattern and the second pattern, and its alignment accuracy is high, up to 5 to 10 microns; then the distance between the mold and the film strip is reduced to make the film strip, the adhesive layer and the first pattern contact, and then the film strip is rolled with a pressure roller to make the film strip, the adhesive layer and the mold fit tightly, thereby improving the embossing accuracy; when peeling off the film, the translation roller group moves in the opposite direction, and the angle between the film strip and the mold remains unchanged during the movement, so the peeling force is uniform, and the adhesive layer after the embossed pattern is more attached to the film strip, which can reduce or avoid the phenomenon of the adhesive layer adhering to the mold.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a film tape provided by an embodiment of the present disclosure;

FIG2 is a schematic diagram of a structure of an imprinting device provided in an embodiment of the present disclosure;

FIG3 is a schematic structural diagram of an imprinting device provided in an embodiment of the present disclosure;

FIG4 is a schematic structural diagram of an imprinting device provided in an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of the structure of an imprinting device provided in an embodiment of the present disclosure.

FIG6 is a schematic diagram of the structure of a transmissive three-dimensional suspended light field imaging material provided in an embodiment of the present disclosure.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

Please refer to Figure 2. The imprinting equipment provided in this embodiment includes a unwinding unit, a receiving unit, a film processing unit and a controller. The unwinding unit is used to drive the film tape 100 to be transmitted to the imprinting component, the receiving unit is used to receive the film tape 100 from the imprinting component, and the film processing unit is used to perform imprinting processing on the film tape 100 transmitted from the unwinding unit to the receiving unit. The imprinting processing includes alignment detection, gluing, imprinting and light curing; the controller is respectively connected to the unwinding unit, the receiving unit and the film processing unit by signal, and is used to control the unwinding unit, the receiving unit and the film processing unit to work together, so that the imprinting equipment can realize UV light transfer of micro-nano high-precision multi-layer graphics on a continuous roll.

FIG1 shows a schematic diagram of the structure of a film strip 100 that is conveyed and processed by an imprinting device. Referring to FIG1 , the film strip 100 has a second pattern 110 that is repeatedly arranged along the length direction of the film strip 100. The second pattern 110 includes a second body and a first alignment mark 101 and a second alignment mark 102. In a possible implementation, the edge of the second body is a rectangle, and the second body is arrayed with micro-nano structures. The first alignment mark 101 is an alignment color mark disposed on the periphery of the second body, and the second alignment mark 102 is an alignment target disposed in the second body. The two alignment targets are respectively located at two diagonal corners of the rectangle. The film strip 100 is a transparent film, and the second pattern 110 can be observed from both the upper and lower surfaces of the film strip 100. The thickness of the film strip 100 ranges from 10um to 500um.

The film processing unit includes a mold 409, a gluing device and a stamping assembly. A first pattern is provided on the top surface of the mold 409, and the number of the first patterns is one or more. The first pattern includes a first main body and a third alignment mark, and the third alignment mark is located at the diagonal of the first main body. When a first pattern is provided on the mold, the first pattern extends from the head end 417 to the tail end 418 of the mold 409. When a plurality of first patterns are provided on the mold, the first patterns are evenly spaced along the length direction of the mold, and the plurality of first patterns on the mold correspond one-to-one to the positions of the second patterns on the film strip, and each first pattern is arranged from the head end 417 to the tail end 418 of the mold 409. The gluing device is used to form a glue layer on the mold 409 and/or the film strip 100. The embossing assembly includes an alignment adjustment device, a pressure roller and a translation roller group 405, wherein the pressure roller and the translation roller group 405 can move between the head end 417 and the tail end 418 of the mold 409; the translation roller group 405 moves from the head end 417 to the tail end 418 to tighten the film strip 100 on one side of the mold 409; the alignment adjustment device is used to adjust the relative position between the mold 409 and the film strip 100 so that the first pattern on the mold 409 is aligned with the second pattern 110 on the film strip 100, and after the first pattern and the second pattern 110 are aligned, the distance between the mold 409 and the film strip 100 is reduced so that the film strip 100, the adhesive layer and the first pattern are in contact; the pressure roller is used to squeeze the film strip 100 and the adhesive layer to achieve embossing after the film strip 100, the adhesive layer and the first pattern are in contact; the translation roller group 405 is used to move from the tail end 418 to the head end 417 of the mold 409 after the pressure roller is embossed to achieve film peeling.

In this embodiment, the film strip 100 is stretched on one side of the mold 409 by moving the translation roller group 405, so that the first pattern on the mold 409 and the second pattern 110 on the film strip 100 are preliminarily aligned, and then the relative position between the mold 409 and the film strip 100 is accurately adjusted by the alignment adjustment device to achieve accurate alignment of the first pattern and the second pattern 110, thereby improving the alignment accuracy; then, the distance between the mold 409 and the film strip 100 is reduced to make the film strip 100, the adhesive layer and the first pattern contact, and then the film strip 100 is rolled by the pressure roller to make the film strip 100, the adhesive layer and the mold 409 fit tightly, thereby improving the embossing accuracy; when peeling off the film, the translation roller group 405 moves in the opposite direction, and the angle between the film strip 100 and the mold 409 remains unchanged during the movement, so the peeling force is uniform, and the adhesive layer after the embossed pattern is more attached to the film strip 100, which can reduce or avoid the phenomenon of the adhesive layer adhering to the mold 409.

During the conveying process of the film strip 100 and the alignment process of the first pattern and the second pattern 110, the film strip 100 cannot contact the mold 409 to avoid friction between the film strip 100, the adhesive layer and the mold 409, which may cause damage to the adhesive layer or the film strip 100. Therefore, the alignment adjustment device is also used to expand the distance between the mold 409 and the film strip 100 after the translation roller group 405 completes the film peeling, so that the film strip 100 does not contact the mold 409 during the conveying and alignment process.

The film processing unit further includes a first detection device 411 and a second detection device 414. The first detection device 411 is disposed between the stamping assembly and the receiving unit, and is used to detect the first alignment mark 101 of the second pattern 110 on the film strip 100. The second detection device 414 is disposed in the mold positioning platform 410 and/or on one side of the mold 409, and is used to detect the alignment deviation between the second alignment mark 102 of the second pattern 110 on the film strip 100 and the third alignment mark of the first pattern on the mold 409. The controller is used to control the unwinding unit and the receiving unit to stop conveying the film strip 100 when the first detection device 411 detects the first alignment mark 101, and to control the unwinding unit and the receiving unit to resume conveying the film strip 100 after the translation roller group 405 completes film peeling. The first detection device 411 and the second detection device 414 can be cameras.

In a possible implementation, a traction roller 412 is further provided between the translation roller group 405 and the receiving unit, and a first detection device 411 is provided between the translation roller group 405 and the traction roller 412, and is used to detect the first mark on the film belt 100 stretched between the translation roller group 405 and the traction roller 412. The traction roller 412 can be driven to rotate by a traction power device, so as to fine-tune the position of the film belt 100, so that the first mark on the film belt 100 stays at a preset position, and then the second pattern 110 on the film belt 100 can be preliminarily positioned with the first pattern on the mold 409. The traction power device is connected to the controller signal.

The film processing unit further includes a mold positioning platform 410, on which the mold 409 is disposed, 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, thereby driving the mold 409 to move. Specifically, the mold 409 can be adjusted in the XYZ direction and at an angle of θ. During the alignment adjustment process between the first pattern and the second pattern 110, the alignment adjustment device drives the mold positioning platform 410 to adjust the angle of θ so that the top surface of the mold 409 is parallel to the film belt 100 tensioned by the translation roller group 405, and then drives the mold positioning platform 410 to adjust in the XY direction so that the first pattern on the mold 409 and the second pattern 110 on the film belt 100 overlap and align in the Z direction, and then drives the mold positioning platform 410 to move in the Z direction so that the film belt 100, the adhesive layer and the first pattern are in contact.

The second detection device 414 can be arranged above the mold 409, and the detection part of the second detection device 414 faces the first pattern of the mold 409. When the translation roller group 405 moves to tighten the film strip 100 above the mold 409, the detection part of the second detection device 414 faces the film strip 100. 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 first pattern and the second pattern 110 can be detected for alignment, as shown in FIG3. In addition, when the mold 409 is made of a transparent material, the second detection device 414 can also be arranged in the mold positioning platform 410, and the detection part of the second detection device 414 faces the mold 409. 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 for alignment, as shown in FIG2, FIG4 and FIG5. The second detection device 414 is a camera, and the number of the camera can be one or more.

The translation roller set 405 includes a first translation roller 407 and a second translation roller 406. The second translation roller 406 is located above the first translation roller 407, so that the film strip passing through the translation roller set 405 is vertical to the surface of the mold 409. The initial position of the translation roller set 405 is located at the head end 417, and the working position is located at the tail end 418. The first translation roller 407 is always located between the mold 409 and the second translation roller 406. The film strip 100 stretched between the first translation roller 407 and the guide roller 403 is parallel to the top surface of the mold 409. In this way, the mold 409 can only be adjusted in the XYZ direction without the need to adjust the angle θ, thereby reducing the alignment adjustment time of the first pattern and the second pattern 110. The stamping assembly also includes a first guide rail and a first driver. The first guide rail extends from the head end 417 of the mold 409 to the tail end 418. The first driver is connected to the controller signal and is used to drive the first translation roller 407 and the second translation roller 406 to move from the head end 417 to the tail end 418 along the first guide rail when the first detection device 411 detects the first alignment mark 101.

After the pressing roller is embossed, the film strip 100, the adhesive layer and the mold 409 remain in contact. During the process of the translation roller group 405 returning from the tail end 418 of the mold 409 to the head end 417 of the mold 409, the first translation roller 407 presses the film strip 100 against the top surface of the mold 409, and the first translation roller 407 and the second translation roller 406 move synchronously, so that the angle between the film strip 100 stretched between the first translation roller 407 and the second translation roller 406 and the film strip 100 stretched between the guide roller 403 and the first translation roller 407 remains unchanged, and the pulling force on the film strip 100 and the adhesive layer remains unchanged, so the adhesive layer is more easily bonded to the film strip 100, which can effectively reduce and avoid the adhesive layer remaining on the mold 409, making the film peeling smoother and more complete.

The embossing assembly includes one or more rollers. When the embossing assembly includes one roller, a guide roller 403 can be provided on the side of the roller 408 away from the tail end 418 of the mold, and the film strip passes through the guide roller 403, the roller 408 and the first translation roller 407 in sequence and then is transmitted to the second translation roller 406, the guide roller 403 remains stationary, the first translation roller 407 moves to make the film strip tensioned above the mold, and the roller 408 is driven by a driver to move between the head end and the tail end of the mold to achieve embossing. When the embossing assembly includes multiple rollers, the roller away from the tail end of the mold can be used to position the film strip, and the multiple rollers close to the tail end of the mold emboss the film strip 100 in sequence or synchronously. The embossing assembly also includes a second guide rail and a second driver, the second guide rail extends from the head end 417 of the mold 409 to the tail end 418, and the second driver is connected to the controller signal, and is used to drive the roller to move along the first guide rail after the first pattern and the second pattern 110 are aligned. When multiple pressure rollers are configured to roll the film strip 100 synchronously, the same second driver can drive the multiple pressure rollers to move; when multiple pressure rollers are configured to roll the film strip 100 in sequence, multiple second drivers can be configured to control the movement of each pressure roller respectively. The pressure roller applies a certain pressure to the film strip 100 to make the film strip 100, the adhesive layer and the mold 409 fit tightly, and at the same time moves between the head end 417 and the tail end 418 of the mold 409, which can drive away the bubbles between the film strip 100, the adhesive layer and the mold 409, so that the three are more closely combined.

In the structures shown in FIG. 2, FIG. 3 and FIG. 5, the pressure roller includes one pressure roller, namely the first pressure roller 408 in the figure, and the film strip is tensioned on one side of the mold through the guide roller 403 and the first translation roller 407. At this time, the guide tube 403 not only guides the film strip, but also presses one end of the film strip to position the film strip. In the structure shown in FIG. 4, the pressure roller includes two pressure rollers, namely the first pressure roller 408 and the second pressure roller 415 in the figure. The second pressure roller 415 presses one end of the film strip. The first pressure roller 408 can move between the head end 417 and the tail end 418 of the mold 409. The guide roller 403 in FIG. 4 mainly guides the film strip, and the second pressure roller 415 positions the film strip to prevent the film strip from shifting in the conveying direction during the movement of the first pressure roller 408.

The embossing device further comprises a curing component, which is used to cure the adhesive layer on the film strip 100 embossed by the embossing roller.

In a possible implementation, the curing assembly includes a curing light source 404, a first movable guide rail and a third driver, wherein the first movable guide rail extends from the head end 417 to the tail end 418 of the mold 409, and the third driver is connected to the controller signal to drive the curing light source 404 to move along the first movable guide rail after the pressing roller completes the imprinting. The curing light source 404 is an ultraviolet curing light source 404, and the wavelength of the light source is 325nm-440nm. In specific implementation, an LED curing light source 404 with a wavelength of 365nm, 395nm or 405nm can be selected, or it can be a mercury lamp, or an electrodeless lamp.

As shown in Fig. 2-3, the gluing device may include an anilox roller 402, and the film strip 100 is glued by rotating the anilox roller 402. The anilox roller 402 may be arranged between the unwinding unit and the guide roller 403. In the structure shown in Fig. 2, a tension roller 401 is further arranged between the unwinding unit and the guide roller 403, and the anilox roller 402 is arranged between the tension roller 401 and the guide roller 403. The tension roller 401 and the guide roller 403 cooperate to evenly lay the film strip 100 on one side of the anilox roller 402, which can improve the uniformity of gluing.

In another possible implementation, the glue application device includes a glue dispensing head, which can be slidably applied to the film strip 100 or the first pattern of the mold 409, wherein the glue dispensing head can be automatically controlled or manually controlled. To implement the glue dispensing head on the film strip 100, the glue dispensing head can be arranged between the unwinding unit and the guide roller 403, and to implement the glue dispensing head on the mold 409, the glue dispensing head 416 can be arranged on the top surface of the mold 409, as shown in FIG5 .

The unwinding unit includes an unwinding roller 201, an unwinding drive device and a tension sensor, and the unwinding drive device and the tension sensor are connected to the controller signal. The film strip 100 is wound on the unwinding roller 201, and the unwinding drive device is used to drive 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 is used to detect the tension value of the film strip 100. The unwinding drive device controls the unwinding roller 201 to unwind at a constant tension according to the tension value detected by the tension sensor.

In a possible implementation, the receiving unit includes a receiving roller 301 and a winding drive device, and the winding drive device is connected to the controller signal. The receiving roller 301 is used to wind up the film strip 100 after the embossing process, and the winding drive device drives the receiving roller 301 to rotate so that the film strip 100 is wound on the receiving roller 301, as shown in Figures 2, 3 and 5. In another possible implementation, the receiving unit includes a cutting device 302, and the cutting device 302 is used to cut the film strip 100 transmitted by the film processing unit, as shown in Figure 4.

This embodiment also provides an imprinting method, comprising the following steps:

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

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

S103, the alignment adjustment device adjusts the relative position between the mold 409 and the film tape 100, so that the first pattern on the mold 409 and the second pattern 110 on the film tape 100 are aligned vertically, and after the first pattern and the second pattern 110 are aligned, the distance between the mold 409 and the film tape 100 is reduced, so that the film tape 100, the adhesive layer and the first pattern are in contact;

S104, a pressing roller squeezes the film strip 100 and the adhesive layer to achieve embossing;

S105 , the translation roller set 405 moves from the tail end 418 to the head end 417 of the mold 409 to peel off the film.

Before step S102, the method may further include: the first detection device 411 detects the first alignment mark 101 of the second image on the film tape 100; when the first detection device 411 detects the first alignment mark 101, the controller controls the unwinding unit and the receiving unit to stop the film tape 100 from being conveyed.

Among them, step S103 may include: a second detection device 414 detects the alignment deviation between the second alignment mark 102 of the second pattern 110 on the film tape 100 and the third alignment mark of the first pattern on the mold 409; an alignment adjustment device drives the mold positioning platform 410 to move the mold 409 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 tape 100.

Before step S105 , a curing component is further included to cure the adhesive layer on the film strip 100 that is embossed by the pressing roller.

Furthermore, after step S105, the method further includes:

S106, the alignment adjustment device adjusts the relative position between the mold 409 and the film tape 100, and increases the distance between the mold 409 and the film tape 100, so that the conveyed film tape 100 does not contact the mold 409;

S107, after the translation roller group 405 completes peeling off the film, the controller controls the unwinding unit and the receiving unit to resume the transmission of the film strip 100.

For other technical contents of the imprinting method, reference may be made to the relevant description of the imprinting device mentioned above, which will not be repeated here.

The above-mentioned imprinting equipment and imprinting method can be used for manufacturing three-dimensional suspended light field imaging material 500.

If the three-dimensional suspended light field imaging material 500 is a transmission type, the device structure is shown in FIG6 , and the device is composed of a microlens array layer 502, a base film 501, and a graphic layer 503 from top to bottom. The thickness of the base film 501 is equal to the focal length of the microlens array. The graphic layer 503 is a groove-type graphic layer 503, and the graphic layer 503 is filled with color ink 504.

A manufacturing process flow of the device is:

1) A graphic layer 503 is prepared on the upper surface of the film strip 100. The graphic layer 503 is a groove-type micro-nano structure. Color ink 504 is filled in the groove. The depth of the groove is 1um to 5um. The graphic layer 503 includes a plurality of unit patterns arranged continuously. Each unit pattern is provided with a stepping positioning color mark and a film strip alignment target. The film strip 100 is prepared in a roll.

2) Provide a mold 409 and place it on the mold positioning platform 410. The surface of the mold 409 has a microlens array. The aperture of the microlens array is between 20um and 100um, and the focal length is determined according to the thickness of the film strip 100.

3) Precision gluing is performed on the upper surface of the microlens array mold or the lower surface of the film strip 100 to form a glue layer.

4) The first first pattern of the film tape 100 moves to the top of the microlens array mold 409, the color mark positioning camera detects the step positioning color mark on the film tape 100, and the film tape 100 stops conveying.

5) The translation roller set 405 moves from the head end 417 to the tail end 418 to tension the film strip 100 above the mold 409 .

5) The target positioning camera accurately locates and identifies the film tape alignment target and the mold alignment target.

6) According to the precise positioning recognition error, the position of the microlens array mold is adjusted through the mold positioning platform until the target positioning camera's alignment target recognition error for the two layers of graphics is within an acceptable error range, so that the microlens array corresponds to the groove position on the unit graphics of the graphic layer 503.

7) The pressing roller embosses the film strip 100, and the curing component cures the embossed adhesive layer.

8) The translation roller group 405 moves in the reverse direction to realize demoulding of the microlens array mold and the film strip 100 .

9) The receiving unit collects the finished products and cuts or winds them up.

Another manufacturing process flow of the device is:

1) A microlens array layer 502 is prepared on the upper surface layer of the film strip 100. The microlens array has an aperture of 20-100 μm, and the focal length is determined according to the thickness of the film strip 100. The microlens array layer 502 includes a plurality of unit patterns arranged continuously, and each unit pattern is provided with a stepping positioning color mark and a film strip alignment target. The film strip 100 is prepared in a roll.

2) According to the stepping positioning color mark of the microlens array layer 502, the first unit pattern of the microlens array layer 502 is moved to the top of the graphic pattern mold.

3) Precision gluing is performed on the upper surface of the graphic mold or the lower surface of the film strip 100 to form a glue layer.

4) The target positioning camera accurately locates and identifies the graphic mold alignment target and the film tape alignment target.

5) According to the precise positioning recognition error, the position of the graphic mold is adjusted through the mold positioning platform until the target positioning camera's alignment target recognition error for the two layers of graphics is within an acceptable error range, so that the pattern on the graphic mold corresponds to the structural position on the unit pattern of the microlens array layer 502.

6) The pressing roller embosses the film strip 100, and the curing component cures the embossed adhesive layer.

7) The translation roller group 405 moves in the reverse direction to realize demoulding of the graphic mold and the film belt 100.

8) The receiving unit collects the finished products and cuts or winds them up.

Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended 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.