阅读说明：本技术 多光彩光变印刷装置及其印刷方法 (Multi-color light-variable printing device and printing method thereof ) 是由 李方见 潘品李 郭丽莎 马健 渠源 陈戌冬 于 2021-07-14 设计创作，主要内容包括：本发明公开了一种多光彩光变印刷装置,包括输送部、丝网印刷单元、第一光彩光变图案形成单元、第二光彩光变图案形成单元及传递系统,所述输送部用于输送待印刷基材；所述丝网印刷单元,位于所述输送部的下一道工序,用于将所述由输送部输送过来的待印刷基材上压印油墨或者清漆,形成半成品；所述第一光彩光变图案形成单元,位于所述丝网印刷单元的下一道工序,将所述半成品的第一区域上形成第一光彩光变图案；所述第二光彩光变图案形成单元,位于所述第一光彩光变图案形成单元的下一道工序,将所述半成品的第二区域上形成第二光彩光变图案。本发明可以针对同一个丝网印刷图案,实现多种效果的多光彩光变技术,也可以实现多种效果图案的拼接。(The invention discloses a multi-color light-to-color printing device, which comprises a conveying part, a screen printing unit, a first color light-to-color pattern forming unit, a second color light-to-color pattern forming unit and a transfer system, wherein the conveying part is used for conveying a substrate to be printed; the screen printing unit is positioned at the next process of the conveying part and is used for impressing ink or varnish on the base material to be printed conveyed by the conveying part to form a semi-finished product; the first color light variable pattern forming unit is positioned in the next process of the screen printing unit and forms a first color light variable pattern on the first area of the semi-finished product; and the second color light variable pattern forming unit is positioned in the next process of the first color light variable pattern forming unit, and forms a second color light variable pattern on the second area of the semi-finished product. The invention can realize multi-light color-changing technology with various effects aiming at the same silk-screen printing pattern, and can also realize the splicing of patterns with various effects.)

1. A multi-color light-variable printing device is characterized in that the device comprises a conveying part, a screen printing unit, a first color light-variable pattern forming unit, a second color light-variable pattern forming unit and a transmission system,

the conveying part is used for conveying a base material to be printed;

the screen printing unit is positioned at the next process of the conveying part and is used for impressing ink or varnish on the base material to be printed conveyed by the conveying part to form a semi-finished product;

the first color light variable pattern forming unit is positioned in the next process of the screen printing unit and forms a first color light variable pattern on the first area of the semi-finished product;

the second color light variable pattern forming unit is positioned in the next process of the first color light variable pattern forming unit and forms a second color light variable pattern on a second area of the semi-finished product;

the transfer system comprises a plurality of transfer cylinders for transferring the substrate to be printed.

2. The multi-color optical variable printing apparatus of claim 1 wherein the first color optical variable pattern forming unit comprises a first magnetic orientation unit and a pre-dry curing mechanism,

the first magnetic orientation unit and the pre-drying and curing mechanism are oppositely arranged at a preset distance,

the first magnetic orientation unit is used for carrying out magnetic orientation on a first area of the semi-finished product;

the pre-drying and curing mechanism is used for drying and curing the first area.

3. The multi-color optical variable printing apparatus according to claim 2, wherein the first color optical variable pattern forming unit further comprises a pre-drying curing adjusting device including a mask and a mask region adjusting mechanism,

the light shielding plate extends along the long axis direction of the first magnetic orientation unit, and a plurality of windows are arranged on the light shielding plate and correspond to the magnetic orientation areas of the first magnetic orientation unit;

the light shielding area adjusting mechanism is arranged on the window and used for adjusting the light transmission area of the window.

4. The multi-color optical variable printing apparatus according to claim 3, wherein the light-shielding region adjusting mechanism adjusts the light-transmitting region of the window by moving between a first position and a second position,

and a light-transmitting area of the window when the light-shielding area adjustment mechanism is located at the first position is different from a light-transmitting area of the window when the light-shielding area adjustment mechanism is located at the second position.

5. The multi-color optical variable printing device according to claim 2, wherein the first color optical variable pattern forming unit further comprises a split pre-drying and curing mechanism, the split pre-drying and curing mechanism comprises a fixed beam, a motor and a curing device,

the fixed cross beam extends along the long axis direction of the first magnetic orientation unit;

the curing device is mounted on the fixed cross beam and can move along the fixed cross beam under the driving of the motor.

6. The multi-color optical lithography apparatus of claim 5 wherein said split pre-drying curing mechanism further comprises a side shield disposed at a side of said curing device for shielding light from said curing device.

7. The multi-color optically variable printing device of any of claims 1 to 6,

the second colorful light variable pattern forming unit comprises a second magnetic orientation unit and a second pre-drying and curing unit,

the second magnetic orientation unit is used for magnetically orienting a second area of the semi-finished product;

the second pre-drying and curing unit is arranged at a preset distance from the second magnetic orientation unit and is used for drying and curing the second area.

8. The multi-color optical variable printing apparatus according to any one of claim 7, wherein the first pre-drying and curing unit corresponds to the first region to perform pre-drying and curing;

the second pre-drying curing unit corresponds to the first region and the second region.

9. The multi-color optically variable printing device according to claim 8, further comprising a rearrangement magnetizing device disposed between the screen printing unit and the first color optically variable pattern forming unit, and between the first color optically variable pattern forming unit and the second color optically variable pattern forming unit.

10. A multi-color optically variable effect printing method using the multi-color optically variable printing apparatus according to any one of claims 1 to 9, comprising:

s1, printing ink or varnish on the substrate to be printed to form a semi-finished product;

s2, sequentially conveying the semi-finished products to a first light-color light-variable pattern forming unit, so that the first area of the semi-finished products is magnetized and positioned, and simultaneously, pre-drying and curing the first area through a first pre-drying and curing unit to form a first light-variable product;

s3, conveying the first optically variable product after the step S2 to a second color optically variable pattern forming unit, and carrying out pre-drying and curing while carrying out magnetization positioning on a second area of the semi-finished product to form a second optically variable product;

and S4, conveying the secondary light-variable product to a drying and curing unit for drying and curing to form a final product.

Technical Field

The invention relates to a multi-light color-changing printing device, a printing method and a pre-drying curing adjusting device thereof, belonging to the technical field of valuable paper production.

Background

The light-Variable technology is also called SPARK technology, and refers to the technology of generating dynamic light-Variable phenomenon after the light-Variable Magnetic Ink (OVMI) is subjected to silk-screen printing and Magnetic orientation process.

In patent documents with patent publication No. CN103547454B entitled "a combined printing apparatus" and patent publication No. CN103192591B entitled "magnetic orientation cylinder and printing press", apparatuses capable of realizing the color light variation technology are mainly disclosed as KBA screen machines and silk embossing combined banknote printing machines independently developed in our country.

At present, aiming at the same silk-screen printing pattern, printing equipment in the world can only realize a single-effect light-color light-changing technology, namely, a rolling effect under the action of a single magnetic field or a changing (Motion) effect under the action of a composite magnetic field, and no multi-light-color light-changing technology for simultaneously realizing two or more than two effects exists.

Disclosure of Invention

The invention aims to provide a pre-drying curing adjusting device.

Another object of the present invention is to provide a multi-color optical variable printing method.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a multi-color light-variable printing device comprises a conveying part, a screen printing unit, a first color light-variable pattern forming unit, a second color light-variable pattern forming unit and a transmission system,

the conveying part is used for conveying a base material to be printed;

the screen printing unit is positioned at the next process of the conveying part and is used for impressing ink or varnish on the base material to be printed conveyed by the conveying part to form a semi-finished product;

the first color light variable pattern forming unit is positioned in the next process of the screen printing unit and forms a first color light variable pattern on the first area of the semi-finished product;

a second color light variable pattern forming unit which is positioned at the next process of the first color light variable pattern forming unit and forms a second color light variable pattern on the second area of the semi-finished product;

a transfer system includes a plurality of transfer cylinders for transferring a substrate to be printed.

Preferably, the first color light variable pattern forming unit comprises a first magnetic orientation unit and a pre-drying and curing mechanism,

the first magnetic orientation unit and the pre-drying and curing mechanism are oppositely arranged at a preset distance,

a first magnetic orientation unit for magnetically orienting a first region of the semi-finished product;

the pre-drying and curing mechanism is used for drying and curing the first area.

Wherein preferably, the first color light variable pattern forming unit further comprises a pre-drying solidification adjusting device, the pre-drying solidification adjusting device comprises a shading plate and a shading area adjusting mechanism,

the light shielding plate extends along the long axis direction of the first magnetic orientation unit, a plurality of windows are arranged on the light shielding plate, and the windows correspond to the magnetic orientation areas of the first magnetic orientation unit;

the light-shielding area adjusting mechanism is arranged on the window and used for adjusting the light-transmitting area of the window.

Preferably, the light-shielding region adjusting mechanism adjusts the light-transmitting region of the window by moving the light-transmitting region between the first position and the second position,

and the light-transmitting area of the window when the light-shielding area adjusting mechanism is located at the first position is different from the light-transmitting area of the window when the light-shielding area adjusting mechanism is located at the second position.

Wherein preferably, the first light color variable pattern forming unit further comprises a split type pre-drying and curing mechanism, the split type pre-drying and curing mechanism comprises a fixed beam, a motor and a curing device,

the fixed beam extends along the long axis direction of the first magnetic orientation unit;

the curing device is arranged on the fixed cross beam and can move along the fixed cross beam under the drive of a motor.

Preferably, the split pre-drying and curing mechanism further comprises a side baffle arranged on the side of the curing device and used for shielding the light of the curing device.

Preferably, the second color light variable pattern forming unit comprises a second magnetic orientation unit and a second pre-drying and curing unit,

a second magnetic orientation unit magnetically orienting a second region of the semi-finished product;

and the second pre-drying and curing unit is arranged at a preset distance from the second magnetic orientation unit and is used for drying and curing the second area.

Preferably, the first pre-drying and curing unit corresponds to the first area for pre-drying and curing;

the second pre-drying curing unit corresponds to the first area and the second area.

Preferably, the screen printing device further comprises a rearrangement magnetizing device, wherein the rearrangement magnetizing device is arranged between the screen printing unit and the first colorful light variable pattern forming unit, and between the first colorful light variable pattern forming unit and the second colorful light variable pattern forming unit.

A multi-color light variable effect printing method using the multi-color light variable printing device includes:

s1, printing ink or varnish on the substrate to be printed to form a semi-finished product;

s2, sequentially conveying the semi-finished product to a first light-color light-variable pattern forming unit, and pre-drying and curing the first area through a first pre-drying and curing unit while magnetizing and positioning the first area of the semi-finished product to form a first light-variable product;

s3, conveying the first optically variable product after the step S2 to a second color optically variable pattern forming unit, and carrying out pre-drying and curing while carrying out magnetization positioning on a second area of the semi-finished product to form a second optically variable product;

and S4, conveying the secondary optically variable product to a drying and curing unit for drying and curing to form a final product.

The invention has the following technical effects: compared with the prior art, the invention provides a pre-drying curing adjusting device, a multi-color light-to-light printing device and a printing method. The multiple effects can be any one of the following 3 cases: 1. rolling effect under the action of various single magnetic fields; 2. the variation (Motion) effect under the action of various composite magnetic fields; 3. rolling effect under the action of a single magnetic field and change (Motion) effect under the action of a composite magnetic field.

Drawings

FIG. 1 is a schematic structural diagram of a first multi-color optical variable printing apparatus according to the present invention;

FIG. 2 is a schematic structural diagram of a first color light variation pattern forming unit according to the present invention;

FIG. 3a is a schematic structural diagram of the pre-drying solidification adjusting apparatus shown in FIG. 2;

FIG. 3b is a schematic structural diagram of the light-shielding region adjusting mechanism in FIG. 3 a;

FIG. 4 is a schematic view of another structure of a first color light variation pattern forming unit according to the present invention;

FIG. 5 is a schematic view of another structure of a first color light variation pattern forming unit according to the present invention;

FIG. 6 is a schematic structural diagram of the split pre-drying and curing mechanism in FIG. 5;

FIG. 7 is a schematic structural diagram of a second color light variation pattern forming unit according to the present invention;

FIG. 8 is a schematic representation of the alignment of OVMP pigment flakes in the ink;

FIG. 9 is a schematic structural diagram of a second multi-color optical variable printing apparatus according to the present invention.

In the drawings, various reference numbers indicate:

1. a conveying section; 2. a screen printing unit; 3. a first color light variation pattern forming unit; 31. a first magnetic orientation unit; 32. a pre-drying curing adjusting device; 321. a visor; 322. a shading area adjusting mechanism; 3221. a window light screen; 3222. a visor rail; 3223. adjusting the screw; 323. a window; 324. reinforcing ribs; 33. a first pre-drying curing unit; 34. a split type pre-drying and curing mechanism; 341. fixing the cross beam; 3411. a transverse plate; 3412. a vertical plate; 342. a motor; 343. a motor guide rail; 344. fixing a beam guide rail; 345. a curing device; 346. a side dam; 4. a second color light variable pattern forming unit; 41. a second magnetic orientation unit; 42. a second pre-drying curing unit; 5. a delivery system; 6. a drying and curing unit; 7. a rearrangement magnetization device.

Detailed Description

The technical contents of the invention are described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the multi-color light-variable printing apparatus provided by the present invention includes a conveying portion 1, a screen printing unit 2, a first color light-variable pattern forming unit 3, a second color light-variable pattern forming unit 4, and a transmission system 5. The transfer system 5 includes a plurality of transfer cylinders for transferring the substrate to be printed. In the present embodiment, the color light variation pattern forming units are two groups, however, in practical applications, a plurality of groups may be provided according to practical requirements.

Specifically, the conveying section 1 is used for conveying a substrate to be printed. The substrate to be printed is a security paper or the like. The transport unit 1 transports the substrate to be printed to the next process (downstream in the advancing direction of the securities). The screen printing unit 2 is located at a position downstream of the transport unit 1 (a position downstream of the transport unit 1 in the traveling direction of the printing substrate) in the next process of the transport unit 1, and imprints ink or varnish on the substrate to be printed transported by the transport unit 1 to form a semi-finished product. In the examples, the printing substrate is paper, but one of ordinary skill in the art will appreciate that it may also be sheets of plastic, metal, or the like. The optically variable pattern on the surface of the semi-finished product comprises a first area and a second area, and the two areas are at least partially not overlapped.

The first color light variation pattern forming unit 3 is located at the next process of the screen printing unit 2, and forms a first color light variation pattern on a first area of the semi-finished product. The second color light variation pattern forming unit 4 is located at the next process of the first color light variation pattern forming unit 3, and forms the second color light variation pattern on the second area of the semi-finished product, thereby forming the first color light variation pattern on the first area of the semi-finished product, forming the second color light variation pattern on the second area, and the first area and the second area are not completely overlapped.

In the present invention, the first and second color-changing patterns are formed by using the principle that a certain angle is formed between the OVMP pigment flakes 12 in the ink and the substrate 13 (see fig. 8). Since the magnetic orientation effect on the OVMP pigment flakes 12 in the optically variable magnetic ink is always effective before the OVMP pigment flakes 12 are pre-cured or naturally permeated and dried, the magnetic orientation can be performed twice or more times during the period, so that the multi-color optically variable technology for realizing more than two effects on the same screen printed pattern can be realized.

As shown in fig. 2, the first color light variable pattern forming unit 3 includes a first magnetic orientation unit 31, a pre-drying and curing adjusting device 32, and a first pre-drying and curing unit 33. The first magnetic orientation unit 31 and the first pre-drying and curing unit 33 are oppositely arranged at a preset distance, the pre-drying and curing adjusting device 32 is arranged between the first magnetic orientation unit 31 and the first pre-drying and curing unit 33, and the sheet-shaped semi-finished product is allowed to pass through between the pre-drying and curing adjusting device 32 and the first magnetic orientation unit 31. The first magnetic orientation unit 31 is located in the next process of the screen printing unit 2, after the semi-finished product is processed in the screen printing unit 2, the semi-finished product is conveyed to the first magnetic orientation unit 31, and the semi-finished product is magnetically oriented by the first magnetic orientation unit 31. The first pre-drying and curing unit 33 performs drying and curing on the first region of the semi-finished product by the pre-drying and curing adjustment device 32 to form a first optically variable product. A first color light variation effect appears in the first area after drying and curing.

As shown in fig. 3a, the pre-drying curing adjustment device 32 includes a light shielding plate 321 and a light shielding region adjustment mechanism 322. The light shielding plate 321 extends along the long axis direction of the first magnetic alignment unit 31 (i.e., the longitudinal direction of the light shielding plate 321 is parallel to the long axis direction of the first magnetic alignment unit 31), and a plurality of windows 323 are provided on the light shielding plate 321, and the windows 323 correspond to the magnetic alignment regions 311 (see fig. 2) of the first magnetic alignment unit 31. The light blocking area adjustment mechanism 322 is provided on the window 323, and adjusts the light transmission area of the window 323.

The light-blocking region adjustment mechanism 322 adjusts the light transmission region of the window 323 by moving between the first position and the second position, and the light transmission region of the window 323 when the light-blocking region adjustment mechanism 322 is located at the first position is different from the light transmission region of the window 323 when located at the second position.

As shown in fig. 3b, the shading area adjusting mechanism 322 includes a window shading plate 3221, two shading plate guide rails 3222, two adjusting screws 3223, two locking nuts 3224, and a plurality of fastening screws (not shown). Specifically, the window shade 3221 is inserted between the two shade guide rails 3222, and may be fixed to the shade guide rails 3222 by a set screw (not shown) engaging with a screw hole 3225 on both sides of the shade guide rails 3222. The size and shape of the window shield 3221 matches the size and shape of the magnetically oriented region 311 and/or the window 323 to completely occlude the magnetically oriented region 311 and/or the window 323. The shade guide track 3222 slides along the lengthwise direction of the shade 321 to guide the sliding movement of the window shade 3221.

Two adjusting screws 3223 are respectively fixed at two vertices of the window shade 3221 and are respectively located at one side of the shade guide track 3222; a locking nut 3224 is sleeved on the adjusting screw 3223 for fixing the adjusting screw 3223.

In addition, a rib 324 is further provided around the periphery of the light shielding plate 321, thereby improving the strength of the light shielding plate 321.

As shown in fig. 4, the first color light variation pattern forming unit 3 may further include a first magnetic orientation unit 31, two pre-drying and curing adjusting devices 32, and a first pre-drying and curing unit 33. The first magnetic orientation unit 31 and the first pre-drying and curing unit 33 are oppositely arranged at a preset distance, two pre-drying and curing adjusting devices 32 are arranged between the first magnetic orientation unit 31 and the first pre-drying and curing unit 33, and the sheet-shaped semi-finished product is allowed to pass through between the pre-drying and curing adjusting devices 32 close to the first magnetic orientation unit 31 and the first magnetic orientation unit 31. The first magnetic orientation unit 31 is located in the next process of the screen printing unit 2, after the semi-finished product is processed in the screen printing unit 2, the semi-finished product is conveyed to the first magnetic orientation unit 31, and the semi-finished product is magnetically oriented by the first magnetic orientation unit 31. The first pre-drying and curing unit 33 performs drying and curing on the first region of the semi-finished product by the pre-drying and curing adjustment device 32 to form a first optically variable product. A first color light variation effect appears in the first area after drying and curing. In the present embodiment, only two pre-drying and curing adjustment devices 32 are provided, however, in practical applications, the number of the pre-drying and curing adjustment devices 32 is arbitrarily set according to practical requirements.

The present invention provides, as an alternative to the structure of the first color light variation pattern forming unit 3 described above, another structure of the first color light variation pattern forming unit 3. The structure of the second first color light variation pattern forming unit 3 will be described in detail below.

As shown in fig. 5, the first color light variable pattern forming unit 3 includes a first magnetic orientation unit 31 and a split type pre-dry curing mechanism 34. The first magnetic orientation unit 31 is disposed opposite to the split type pre-drying and curing mechanism 34 with a preset distance therebetween. The first magnetic orientation unit 31 is located at the next process of the screen printing unit 2 to magnetically orient the semi-finished product. The split type pre-drying and curing mechanism 34 performs drying and curing on the first area of the semi-finished product to form a first optically variable product. The first color light variation effect can be obtained as well.

As shown in fig. 6, the split pre-drying and curing mechanism 34 includes a fixed beam 341, a motor 342, a motor rail 343, a fixed beam rail 344, a curing device 345 and a side guard 346. Specifically, the fixed beam 341 extends along the long axis direction of the first magnetic alignment unit 31, and includes a horizontal plate 3411 and a vertical plate 3412, and the horizontal plate 3411 and the vertical plate 3412 are vertically connected.

A motor 342 is arranged on the horizontal plate 3411, a linear rail 343 is arranged on the motor 342, and a plurality of curing devices 345 are connected to the linear rail 343 at fixed intervals; a curing device guide rail 344 is arranged on the vertical plate 3412, and a curing device 345 is connected to the linear guide rail 343; the side baffles 346 are disposed on one side or both sides of the curing device 345, and are used to shield the curing regions of the curing device 345, so as to avoid interference between adjacent curing devices 345, thereby facilitating the implementation of "splicing" of the first region and the second region of the same pattern. After the first color light variation pattern forming unit 31 with the above structure forms a first color light variation effect in the first region of the pattern, another color light variation effect is formed in the second region of the same pattern by the second color light variation pattern forming unit 4 below, so that the color light variation effect in the same pattern is realized, that is, the first region and the second region of one pattern have different color light variation effects.

As shown in fig. 7, the second color light variable pattern forming unit 4 includes a second magnetic orientation unit 41 and a second pre-drying and curing unit 42. The second magnetic orientation unit 41 is located at the next process of the first color light variation pattern forming unit 3, and magnetically orients the second region of the first color light variation product. The second pre-drying and curing unit 42 is arranged at a preset distance from the second magnetic orientation unit 41, and is used for drying and curing the second area of the first optically variable product to form a second optically variable product. The area that the second pre-drying curing unit 42 can cure may cover the entire product, including the first area and the second area of the semi-finished product, or may cover only the second area. For example, the second pre-drying curing unit 42 has a light emitting length comparable to the axial length of the second magnetic orientation unit 41 to cure the entire product. In other words, the first pre-drying and curing unit corresponds to the first area for pre-drying and curing; the second pre-drying curing unit corresponds to the first area and the second area.

In addition, the multi-color optical variable printing device further comprises a drying and curing unit 6, which is arranged behind the second color optical variable pattern forming unit 4 (as shown in fig. 1) and used for drying and curing the secondary optical variable products.

In addition to the above-described multicolor printing apparatus, the present invention provides another multicolor variable printing apparatus. As shown in fig. 9, the multi-color light-variable printing apparatus further includes a rearrangement magnetizer 7, and the rearrangement magnetizer 7 is disposed between the screen printing unit 2 and the first color light-variable pattern forming unit 3, and between the first color light-variable pattern forming unit 3 and the second color light-variable pattern forming unit 4. In the present embodiment, the rearrangement magnetizer 7 is two, the first rearrangement magnetizer 7 and the second rearrangement magnetizer 7. The position of the rearrangement magnetizing device 7 is designed so that the substrate to be printed enters the first color light variation pattern forming unit 3 after going from the screen printing unit 2 to the first rearrangement magnetizing device 7, and then enters the second color light variation pattern forming unit 4 after going from the first color light variation pattern forming unit 3 through the second rearrangement magnetizing device 7. When the printing ink or varnish is printed on the substrate to be printed, the magnetic pigment flakes inside are randomly and irregularly arranged, and when the substrate to be printed is conveyed to the rearrangement magnetizing device 7, the magnetic pigment flakes are rearranged according to a certain rule, for example, are arranged in parallel to the substrate to be printed, so that the consistency of magnetization orientation can be improved when the magnetic pigment flakes pass through the first magnetic orientation unit 31 and the second magnetic orientation unit 41, and the light color changing effect is brighter. In addition, the structure and principle of other parts are the same as those of the first multi-color light-to-color printing device, and are not described in detail. In this embodiment, the number of the rearrangement magnetizing devices 7 is two, and in a specific implementation, the number of the rearrangement magnetizing devices can be set according to the number of the color light variable pattern forming units, which is not described in detail.

The invention also provides a multi-color light-to-effect printing method, which utilizes the multi-color light-to-effect printing device. Specifically, taking two groups of light-color variable pattern forming units as an example, S1, printing ink or varnish is printed on the substrate to be printed to form a semi-finished product; s2, conveying the semi-finished product to a first light-variable pattern forming unit, magnetizing and positioning a part of the ink or varnish of the semi-finished product, and pre-drying and curing the magnetized part of the ink or varnish through a first pre-drying and curing unit to form a first light-variable product; s3, conveying the first optically variable product after the step S2 to a second optically variable pattern forming unit, magnetizing and positioning a second area, which is not subjected to the pre-drying and curing in the step S2, on the first optically variable product, and simultaneously carrying out pre-drying and curing to form a second optically variable product; and S4, conveying the second optically variable product which is magnetized for at least two times and pre-dried and solidified to a drying and solidifying unit, and drying and solidifying to form a final product.

In summary, compared with the prior art, the present invention provides a pre-drying curing adjustment apparatus, a multi-color optical variable printing apparatus and a printing method, by setting magnetic orientation units with different magnetic field effects and an adjustable pre-drying curing mechanism, multi-color optical variable effects (multi-color optical variable) can be respectively realized for multiple regions of the same screen printing pattern, and a splicing technique of multi-effect patterns can also be realized. The various effects may be: 1. rolling effect under the action of various single magnetic fields; 2. motion (Motion) effect under the action of various composite magnetic fields; 3. rolling effect under the action of a single magnetic field and Motion (Motion) effect under the action of a composite magnetic field.

The present invention has been described in detail. It will be apparent to those skilled in the art that any obvious modifications thereof can be made without departing from the spirit of the invention, which infringes the patent right of the invention and bears the corresponding legal responsibility.