CN102267277B - Magnetic orientation and printing - Google Patents
Magnetic orientation and printing Download PDFInfo
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- CN102267277B CN102267277B CN201010200496.9A CN201010200496A CN102267277B CN 102267277 B CN102267277 B CN 102267277B CN 201010200496 A CN201010200496 A CN 201010200496A CN 102267277 B CN102267277 B CN 102267277B
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Abstract
The invention relates to magnetic orientation and printing, disclosing a device and method for manufacturing ink contained on a substrate, the magnetism for magnetic orientation in a coating composition or a marker of a magnetizable particle. The device comprises flat plate screen printing equipment and magnetic orientation equipment, wherein the flat plate screen printing equipment is provided with a scriber plate, a flat plate printing screen and a printing press plate used for receiving the substrate, the printing press plate is provided with an upper surface facing to the printing screen and a first direction along the upper surface of the printing screen, the substrate can be dismantled along the first direction; the magnetic orientation equipment comprises a plurality of magnetic assemblies; the magnetic orientation equipment is arranged below the upper surface of the printing press plate; the plurality of magnetic assemblies are arranged along the first direction and can move towards the second position close to the upper surface of the printing press plate from the first position away from the upper surface of the printing press plate in a flowing manner. The magnetic orientation equipment comprising one or more magnetic assemblies can be also used as a separate flat plate magnetizing device for a printing method, for example, the magnetic orientation equipment can be used as an additional processing station used behind a conventional flat plate or rotating silk screen printing equipment. The invention also provides a method for manufacturing printing files by using the device.
Description
Technical field
The invention belongs to secure file print field, relate to printing process and relevant printing equipment, specifically silk-screen printing device, for printing the security feature based on ink, described security feature is included in the granules of pigments of the magnetic orientation in ink or the coating composition of sclerosis.
Background technology
The granules of pigments of magnetic orientation with in curing ink in printing is known as the security feature for the protection of valuable document.Also become known for manufacturing concrete magnetic apparatus and the method for described security feature, for example, can from EP-B 1641624, WO-A 2006/061301, WO-A 2008/009569 and WO-A 2008/046702, learn.WO-A 2005/000585 discloses the industrial screen process press for the rotary printing of described security feature.In described printing machine, silk-screen printing device and magnetic orientation equipment all have the form of rotary drum.
WO-A 2005/000585 discloses independently spin magnetization orientation equipment, it can be used for follow-up printing process, for example, as the additional processing station after the offset printing device for example conventional, in order to before the described ink of sclerosis (dry, solidify), give the magnetic that is included in fresh printing ink or magnetizable granules of pigments with concrete orientation.
The magnetic paint particle of optically-variable can be from United States Patent (USP) 4,838, learns in 648 and 6,875,522.
But, up to now, be not yet disclosed in the magnetic orientation device that combines dull and stereotyped screen printing apparatus and magnetic orientation equipment in single processing station.On the other hand, flat screen lithographic plate screen printing apparatus has industrial use widely, therefore the magnetic orientation equipment that is suitable for working together with such printing equipment is had to long-term demand.
Summary of the invention
Device of the present invention is suitable for manufacturing the magnetic of magnetic orientation or the mark of magnetizable particle in ink or the coating composition being included on backing material plate, and this device comprises:
There is scraper plate, offset printing sieve (flat printing screen) and for accepting the flat screen screen printing apparatus of printing pressing plate of described backing material plate, this printing pressing plate has and faces the upper surface of described printing sieve and the first direction along its upper surface, can unload in the direction described backing material plate; And comprise the magnetic orientation equipment of multiple magnet assemblies.
Described magnetic orientation equipment is arranged on the below of the upper surface of described printing pressing plate, described multiple magnet assembly is along described first direction setting, and all magnet assemblies can be shifted to the second place near the upper surface of described printing pressing plate together from the primary importance of the upper surface away from described printing pressing plate.
In this manual, term " magnetic " refers to it itself is the material of Magnetic Field Source.Term " magnetizable " refers to that reaction produces the ferromagnetic or ferrimagnetic material in magnetic field, itself is not the material of Magnetic Field Source.
In first main embodiment of the present invention, described magnet assembly can move back and forth with the second direction of the upper surface horizontal (preferred vertical) of described printing pressing plate on edge between primary importance and the second place.The base material of described coating can only unload in the time that described magnet assembly is shifted to primary importance backward, thereby causes the compulsory stand-by period in process for making.
For fear of the stand-by period, thereby accelerate manufacturing process, in second main embodiment of the present invention, the mode that described magnet assembly can move with front and back rolling between primary importance and the second place moves.The mode that uses this front and back rolling to move, the unloading of the movement backward of described magnet assembly and the base material of described coating can be carried out in that accompany, synchronous movement, thereby prevents that the magnetic picture making on backing material plate is fuzzy.
Preferably, the texturing that at least one magnet assembly comprises permanent-magnet material and magnetized plate, as disclosed in EP-B1641624.
Preferably, described texturing with magnetized plate be composite, comprise polymer as construction adhesive, preferred rubber shape or plastic-like polymer, and permanent-magnet powder is as filler.
Preferably, the texturing that at least one magnet assembly comprises permanent-magnet material and magnetized plate, comprise at least one additional permanent magnet, be arranged on and act on the position of the intrinsic magnetic force antagonism between the magnetized plate of magnet and texturing, as disclosed in WO-A 2008/046702.
It should be noted that described dull and stereotyped screen printing apparatus also allows with safe composition (security element) printing element, the magnetic paint particle that this safe composition comprises directed optically-variable.Magnetic paint particle (OVMP) that it should be noted that optically-variable can be used for protecting secure file as bank note, valuable document, card, traffic ticket, passport, documentary evidence, current file, expenses of taxation file and Product labelling.
The sieve mesh of described serigraphy is chosen as has suitable order footpath and thickness with printing ink or coating composition.Specifically in some embodiments, when the magnetic that comprises optically-variable when ink or coating composition or magnetizable granules of pigments, (it has average diameter is conventionally the form that (top-cut) cut on the irregular platelet of 15-20 micron and the top of 25-35 micron, and thickness is the order of magnitude of 1 micron), the order footpath of the sieve mesh of serigraphy must be chosen as and allow the magnetic of optically-variable or magnetizable particle safety sieve and do not damage printing quality.Therefore, the free screen size of about twice is cut on the top that the sieve mesh of serigraphy preferably has a pigment particle size, that is, and and 40-90 micron, preferably 50-70 micron.
In order to allow the easy orientation of particle, the film thickness of the deposit of ink thing of printing should preferably be substantially equal to average pigment particle size, that is, and and 15-20 micron.
Described scraper plate must be " firmly " type, and Shore (Shore) A hardness exceedes 70 °.In when printing, softer vane material can be out of shape, thereby causes excessive ink transfer to base material, cause fuzzy, if fine rule feature is not to disappear completely.Preferably plastic scrapers, particularly polyurethane scraper plate, because it has better printing effect than rubber flap.
In addition, also disclose the method for manufacturing mark, the method comprises the following steps:
A) provide device of the present invention;
B) on the printing pressing plate of device, load backing material plate, this backing material plate is at least loaded with the wet ink or the coating composition that comprise magnetic or magnetizable particle on its part surface;
C) all magnet assemblies of device are shifted to the second place near the upper surface of printing pressing plate from the primary importance of the upper surface away from printing pressing plate together, thus magnetic or magnetizable granules of pigments in directed described wet ink or coating composition;
D) described magnet assembly is shifted to described primary importance backward;
E) unload described backing material plate from described printing pressing plate; And
F) solidify described ink.
In this manual, term " wet ink or coating composition " represents to be applied on base material, but the coating composition of unhardened (solidify, be dried) also.
One of the inventive method preferred embodiment in, the movement of described magnet assembly between primary importance and the second place can be carried out along the mode moving back and forth with the horizontal second direction of the upper surface of described printing pressing plate.
The inventive method another preferred embodiment in, the movement of described magnet assembly between primary importance and the second place can before and after the mode that moves of rolling carry out.The mode that uses this rolling to move, the movement of described magnet assembly and the unloading of described backing material plate can be carried out in synchronous movement, thereby prevent that the magnetic picture making on backing material plate is fuzzy.
In the particularly preferred embodiment of the inventive method, the step of loading backing material plate on the printing pressing plate of device comprises the wet coating composition that at least part of use comprises magnetic or magnetizable particle or ink applies or the surface of stamp backing material plate.
Another preferred embodiment in, it is 40-90 micron that described coating or stamp are used mesh size, preferably the offset printing of 50-70 micron sieve carries out.
Another preferred embodiment in, described coating or stamp are used the composition of magnetic paint particle that comprises optically-variable to carry out.
The step of further preferably wherein said coating or stamp is the method for carrying out together with the magnetic orientation of granules of pigments; And wherein said magnet assembly was shifted to the method for printing pressing plate before the described backing material plate of stamp.
Apparatus and method of the present invention can be used for manufacturing mark, coat magnetic in composition or the magnetic orientation of magnetizable particle carry out by file.
Specifically secure file of described file, is preferably selected from: bank note, valuable document, card, traffic ticket, passport, documentary evidence, current file, expenses of taxation file and Product labelling.
Brief description of the drawings
Fig. 1 a-1d: schematically described according to an embodiment of the invention, the magnetic by magnetic orientation on backing material plate in ink or coating composition or magnetizable particle are manufactured the device of mark;
Fig. 2 a-2c: schematically described according to an embodiment of the invention, used the another kind of embodiment of the printing process of identical equipment;
Fig. 3 a-3c: schematically described the printing process of seeing from top;
Fig. 4 a-4d: show according to the prototype of the device of an embodiment of the invention;
Fig. 5 a-5g: described according to all kinds of the serigraphy sieve mesh of each embodiment of the present invention;
Fig. 6: the cross section of having described the monofilament mess printing sieve mesh by being loaded with photoresist printing template;
Fig. 7 a-7b: the effect of having described vane material;
Fig. 8 a-8d: the printing effect that shows four kinds of dissimilar scraper plate gained.
Detailed description of the invention
Below, further explain device of the present invention and printing process with reference to accompanying drawing.
Device of the present invention is suitable for manufacturing the magnetic of magnetic orientation or the mark of magnetizable particle that are included in ink or coating composition on backing material plate, and this device comprises: have scraper plate, offset printing sieve and for accepting the flat screen screen printing apparatus of printing pressing plate of described backing material plate.This printing pressing plate has and faces the upper surface of described printing sieve and the first direction along its upper surface, can unload in the direction described backing material plate.Described magnetic orientation equipment is arranged on the below of the upper surface of described printing pressing plate, and described multiple magnet assembly is along the first direction setting along described upper surface.All magnet assemblies can be shifted to the second place near the upper surface of described printing pressing plate together from the primary importance of the upper surface away from described printing pressing plate.
In addition comprise the following steps for the manufacture of the method for mark of the present invention:
A) provide device of the present invention;
B) on the printing pressing plate of device, load backing material plate, this backing material plate is at least loaded with the wet ink or the coating composition that comprise magnetic or magnetizable particle on its part surface;
C) all magnet assemblies of device are shifted to the second place near the upper surface of printing pressing plate from the primary importance of the upper surface away from printing pressing plate together, thus magnetic or magnetizable granules of pigments in directed described wet ink or coating composition;
D) described magnet assembly is shifted to described primary importance backward;
E) unload described backing material plate from described printing pressing plate; And
F) solidify described ink.
According to the present invention, magnetic orientation equipment is arranged on the below of the printing pressing plate of screen printing apparatus, make magnet assembly from below (position of removal) shift near printing pressing plate position (position of using), make the magnetic field penetration printing pressing plate of magnet assembly and the backing material plate arranging on it, thereby be oriented in magnetic or the magnetizable granules of pigments in wet ink or the coating of using on described backing material plate.As obviously known in those skilled in the art, printing pressing plate must be permeable to static magnetic field.
Should also be noted that not only directedly, be also magnetic or the impact in the Ye Huishou magnetic field, position of magnetizable particle, as is known to persons skilled in the art.Therefore, under the influence of magnetic field of non-homogeneous, described particle not only adopts definite orientation, also more intensive in space or more not arrangement thick and fast.For example, in the situation of spheric granules (, soft magnetism carbonyl iron particles) (it is not preferred orientation in magnetic field) can obtain magnetic " orientation " image, referring to WO 2005/002866 even if why this explained.In fact the image of, observing is in this case particle density image.
An importance of the present invention is that magnetic orientation equipment comprises multiple magnet assemblies.This is that the technical limitations of method for printing screen is required, only supports the printing of each backing material plate single to pass through, and dry immediately.Wet backing material plate that it should be noted that stamp contacts and can cause the mark already having printed to fog with any secondary of printing sieve.On the other hand, conventionally can on same backing material plate, print the project of many repetitions, thereon with two distribution of sizes; Therefore, the project of each printing needs its oneself magnet assembly, and all magnet assemblies must be mobile together in magnetic orientation technical process.
Described orientation equipment is further set, method for printing screen and magnetic orientation method can be carried out together.
For the orientation of fixed magnetic or magnetizable granules of pigments in the coating composition that comprises it, ink or coating must subsequently by sclerosis (being dried).In order to reach this purpose, the base material of coating must be cured processing, preferably radiation curing as poly-in light (for example, UV solidifies) or electronic beam curing.As obviously known in those skilled in the art, described coating composition must be chosen as and for example can be cured according to the curing mechanism of selecting.
Described solidifying can be undertaken by radiation on printing pressing plate, and the base material applying can unload from printing pressing plate subsequently.But preferably, described base material unloads and passes through specifically-built drier equipment from printing pressing plate and solidifies.When from printing pressing plate while unloading base material, must be noted that to cause the magnetic orientation image blur that makes because of base material and contingent the relatively moving of the magnet assembly under it.Therefore, described magnet assembly must be removed by this way before the described base material of unloading: do not darken or damage the magnetic paint directional images making before.
The mode of preferably removing magnet assembly is by horizontal the moving relative to substrate surface, and base material itself printing, magnetic orientation is static.
The another kind of mode of removing magnet assembly is to move by rolling, carries out with tangentially removing together of base material printing, magnetic orientation.
It must be emphasized that, the present invention also comprises such embodiment, and wherein the movement of magnet assembly is chosen as sometimes pure and moves back and forth and between pure rolling moves.It should be noted that this can be by selecting rotation (rotating shaft) center for magnet assembly to realize aptly.Select an one radius can realize away from the rotating shaft of the plane of moving substrate the embodiment that pure rolling moves, wherein, base material tangentially moves, consistent with magnet assembly, and accompanies with the latter.Select the rotating shaft of the plane of close moving substrate can realize the pure embodiment moving back and forth, wherein, magnet assembly moves with respect to the flat transverse of base material.Sometimes can realize pure moving back and forth and the embodiment of the movement of pure rolling between moving at the rotating shaft of certain position between described end points.
In the present invention, most preferred magnetic or magnetizable particle are the magnetic paint particles of optically-variable, as US4,838,648 and US 6,875,522 in disclosed.Magnetic paint (OVMP) that it should be noted that optically-variable can be used for protecting secure file as bank note, valuable document, card, traffic ticket, passport, documentary evidence, current file, expenses of taxation file and Product labelling.The magnetic paint particle of described optically-variable has the form of irregular platelet, and average diameter is 15-20 micron, and cut on the top with 25-35 micron, and thickness is the order of magnitude of 1 micron.
In particularly preferred embodiments, comprise print steps for the manufacture of the method for mark, the ink or the coating composition that wherein comprise magnetic or magnetizable particle are applicable on backing material plate.In this special embodiment, provide wet ink or the coating composition that described backing material plate comprises that at least part of use comprises magnetic or magnetizable particle to apply or its surperficial step of stamping.
More preferably, described coating or stamp, by using suitable offset printing sieve, scraper plate and described ink or coating composition, are carried out serigraphy and are realized on flat screen, lithographic press.
The stamp of backing material plate and the magnetic orientation of granules of pigments also can in turn or mutually be carried out together.
In the special embodiment of the method, described magnet assembly is before mobile scraper, to shift on ink printing sieve the printing pressing plate of tablet device.This causes the maximization for the open-assembly time of magnetic or magnetizable particle, thereby makes its orientation in the scope of magnet assembly.
Below referring to Fig. 1 a-1d, the embodiment of manufacturing mark according to the magnetic for the ink on backing material plate or coating composition by magnetic orientation of the present invention or magnetizable particle has schematically been described separately, preferred second main embodiment, and show the embodiment of printing process.
In Fig. 1 a, be loaded in the printing pressing plate 1 of flat board, dull and stereotyped screen process press for the backing material plate 5 of stamping.Printing sieve 2, scraper plate 3 and ink 4 are positioned at removed position (removed position).Described magnet assembly 6 is positioned at removed position.
In Fig. 1 b, backing material plate 5 is positioned at printing position, and printing sieve 2 is positioned at low level, moves stamp backing material plate 5 on the ink 4 of scraper plate 3 on sieve 2.Described magnet assembly 6 is positioned at removed position.
In Fig. 1 c, backing material plate 5 is positioned at printing position; Printing sieve 2, scraper plate 3 and ink 4 are positioned at removed position.Described magnet assembly 6 is positioned at the position of using, the magnetic in the ink of directional-printing or magnetizable particle.
In Fig. 1 d, backing material plate 5 printing and directed is from printing pressing plate 1 unloading of dull and stereotyped screen process press.Described magnet assembly 6 moves into removed position together.The ink of printing solidifies by UV drying equipment 7, and magnetic or magnetizable particle are fixed on to directed state.
Referring to Fig. 2 a-2c, it schematically shows the interchangeable embodiment of the printing process that uses identical device below.
In Fig. 2 a, be loaded in the printing pressing plate 1 of flat board, dull and stereotyped screen process press for the backing material plate 5 of stamping.Printing sieve 2, scraper plate 3 and ink 4 are positioned at removed position.Described magnet assembly 6 is positioned at the position of using.
In Fig. 2 b, backing material plate 5 is positioned at printing position, and printing sieve 2 is positioned at low level, moves stamp backing material plate 5 on the ink 4 of scraper plate 3 on sieve 2.Described magnet assembly 6 is positioned at the position of using, and is oriented in together magnetic or the magnetizable particle in the ink of printing with printing process.
In Fig. 2 c, backing material plate 5 printing and directed is from printing pressing plate 1 unloading of dull and stereotyped screen process press.Described magnet assembly 6 moves into removed position together.The ink of printing solidifies by UV drying equipment 7, and magnetic or magnetizable particle are fixed on to directed state.
Referring to Fig. 3 a-3c, it schematically shows printing process below, from top:
In Fig. 3 a, be loaded in the printing pressing plate l of flat board, dull and stereotyped screen process press for the backing material plate 5 of stamping.Printing sieve 2, scraper plate 3 and ink 4 are positioned at removed position.Described magnet assembly (invisible) is positioned at the position of using.
In Fig. 3 b, backing material plate 5 is positioned at printing position, and printing sieve 2 is positioned at low level, moves stamp backing material plate 5 on the ink 4 of scraper plate 3 on sieve 2.Described magnet assembly is positioned at the position of using, and is oriented in together magnetic or the magnetizable particle in the ink of printing with printing process.
In Fig. 3 c, backing material plate 5 printing and directed is from printing pressing plate 1 unloading of dull and stereotyped screen process press.Printing sieve 2, scraper plate 3 and ink 4 are positioned at removed position.
Referring to Fig. 4 a-4d, it shows according to the prototype of the device of an embodiment of the invention below.
Fig. 4 a is with three different views (i)-(iii) show BMSP-150M flat board, dull and stereotyped screen printing apparatus, and the details of the printing pressing plate of change is as follows:
(i) full figure of printing equipment;
(ii) inserted the printing pressing plate of magnetic orientation equipment;
(iii) removed the printing pressing plate of magnetic orientation equipment.
Fig. 4 b is with two different views (i)-(ii) show according to the printing pressing plate of the device with rotatable magnet assembly of second main embodiment of the present invention:
(i) in " position of using ";
(ii) at " removed position ".
Fig. 4 c shows rotatable magnet assembly according to the embodiment of the present invention with two different views (i)-(ii):
(i) for the manufacture of " rolling bar " feature;
(ii) for the manufacture of " light switch " or " 3D " feature.
Fig. 4 d shows for according to the back-up block of the magnetic orientation equipment exemplifying of the device of second main embodiment of the present invention with three different views (i)-(iii):
(i) do not there is the magnet assembly of insertion
(ii) there is the magnet assembly of insertion in " position of using "
(iii) there is the magnet assembly of insertion at " removed position ".
Referring to Fig. 5 a-5e, it has described the dissimilar serigraphy sieve mesh can be used in different embodiment of the present invention below:
A) first kind multifibres woven fabric;
B) Equations of The Second Kind multifibres woven fabric;
C) monofilament calendering sieve mesh;
D) cross section of calendering sieve mesh;
E) electroplate the multicellular metal foil forming.
Described offset printing sieve can be the known any type in serigraphy field, and it comprises frame, by for example timber or preferably aluminum obtain, and this frame serigraphy sieve mesh of carrying.Described serigraphy sieve mesh, the carrier of printing template, can be specifically that (Fig. 5 is sheet c), is made by nylon, polyester or stainless steel for porous, thin woven fabric, multifibres (Fig. 5 a-5b) or monofilament.The most preferably monofilament frame of low elongation polyester or stainless steel framework.Or described serigraphy sieve mesh can be chemical etching, laser-induced thermal etching, or electroplate multicellular metal foil (Fig. 5 e), for example stainless steel foil forming.
The sieve contacting with the base material of printing ink and/or printing and metal parts should be nonmagnetic substances, conflict in order to avoiding with magnetic paint and any of magnetic orientation method.
The feature of described serigraphy sieve mesh is also its braiding parameter, that is, and and braided design, grit number (sieve mesh/inch or sieve mesh/centimetre), sieve mesh thickness (micron) and filament diameter (micron).Can obtain aperture (position) and theoretical deposit of ink (micron) from these parameters.Sieve mesh thickness is conventionally to a certain extent lower than the twice of filament diameter, because the staggered fluctuation of filament allows some vertical extruding (calenderings: Fig. 5 d).
Serigraphy sieve mesh is a critical elements of the present invention, and it must be chosen as has magnetic that suitable order footpath and thickness comprises most preferred optically-variable for printing or ink or the coating composition of magnetizable granules of pigments.The film thickness (in order to allow the easy orientation of particle) of the deposit of ink of printing should preferably be about average pigment particle size, i.e. 15-20 micron.Described serigraphy sieve mesh should have free screen size, is about the twice that cut on the top of pigment particle size, and aperture is 50-70 micron in the present invention.
Therefore, be 40-90 micron for the preferred screen size of serigraphy sieve mesh of the present invention, most preferably 50-70 micron.
The preferred grit number of described sieve mesh is 150-300 sieve mesh/inch (60-120 sieve mesh/centimetre), most preferably 180-250 sieve mesh/inch (72-100 sieve mesh/centimetre).
The preferred filament diameter of described sieve mesh is 30-70 micron, most preferably 45-55 micron.
Referring to Fig. 5 f-5g, the dissimilar serigraphy sieve mesh template that can be used for each embodiment of the present invention is described below:
F) computer-sieve printing template;
G) photoresist printing template.
Referring to Fig. 6, it has described the cross section of the monofilament mess printing sieve mesh by being loaded with photoresist printing template below.This printing template is the carrier of printing information.It is advantageously manufactured by photoresist process, wherein, whole serigraphy sieve mesh applies with photoresist in the first step, described photoresist is taken a picture and is exposed to printing information (plus or minus at second step, depend on resist type), then the resist exposing is at the 3rd step chemical development, it is optionally removed from serigraphy sieve mesh from the region of wanting printing ink.Result be loaded with printing template sieve mesh (Fig. 5 g).Or, described template also can be by non-selectively applying whole sieve mesh, then the coating of the ink that optionally mechanically cutting will print is manufactured, or even more advantageously manufactures by directly carry out optionally ink jet printing in sieve mesh that (computer-riddler skill, Fig. 5 f).
Referring to Fig. 7, it has described the effect of vane material below.Fig. 7 a has described the situation of plastic scrapers, and it is hard, while being presented at printing, is not out of shape.Such scraper plate has been guaranteed to contact with the line of compass screen surface in scraping technique, causes the accurate measurement to transferring to the ink on base material, that is, the ink being only included in sieve mesh is transferred on base material.Result is uniform deposit of ink and accurate image.As further advantage, this plastic scrapers is presented at passs and does not almost expand in time with being included in when solvent in ink contacts.
Fig. 7 b has described the situation of rubber flap, and it is soft, flexible, is deformed into a kind of contract (contacting with compass screen surface opposite) in printing operation, forces other ink by the sieve mesh on base material.Result is uneven deposit of ink and the image with fuzzy edge.As further shortcoming, this rubber flap can be passing and expand with being included in when solvent in ink contacts in time.
Referring to Fig. 8, it shows the printing effect of the scraper plate gained dissimilar with four kinds that provide in following table below.The printing ink of identical substrate material for all printings, identical printing sieve, the identical optically-variable containing above-mentioned flake pigment and identical printing condition are realized.
Fig. 8 a uses soft (Shore A is 60 °) naphthalene diisocyanate Unitex Ulon scraper plate (deriving from the special Justin Lemberg group (Trelleborg Group) of Britain) to obtain, as being generally used on rotary screen forcing press.
Too much ink deposits by this scraper plate, as seen in disadvantageous feature, and the whippletree almost disappearing of these disadvantageous features such as letter " T " and the inner ring almost disappearing.
Fig. 8 b uses soft (Shore A is 65 °) rubber flap (deriving from Tianjin Hua Yu (Huayu) company of Chinese Tianjin) to obtain.This scraper plate does not have repellence to ink solvent.
Use the printing effect of this scraper plate obviously better, but deposit of ink still exceed the upper limit of tolerance value; Some in disadvantageous feature are still too narrow.
Fig. 8 c uses hard (Shore A is 75 °) polyurethane traditional screeds (deriving from Shengze Hua Yu (Shenze Huayu) company in Shengze county, County, Hebei Province, China) to obtain.
This scraper plate has provided fabulous printing effect, makes to obtain best balance between ink density and the solution of unfavorable feature.
Fig. 8 d uses hard (Shore A is 85 °)
sR1 polyurethane scraper plate (deriving from the method More company (Fimor, Le Mans) of Le Mans, France) obtains.
This scraper plate has provided fabulous printing effect, obviously lower but cost is ink density on base material.
Therefore, have required printing sieve, be hard scraper plate for printing that the best scraper plate of ink type of the present invention selects, its Xiao A hardness exceedes 70 ° (" Xiao A hardness " refers to the one in hardometer specification, by the technical staff of plastics and rubber materials is known).
Apparatus and method according to the present invention can be used for manufacturing mark, by the magnetic in magnetic orientation coating composition on file or magnetizable particle.Specifically secure file of described file, preferably bank note, valuable document, card, traffic ticket, passport, documentary evidence, current file, expenses of taxation file and Product labelling.
exemplifying of further embodiment of the present invention
a. screen printing apparatus
Referring to Fig. 4 a-4d.Described screen printing apparatus (Fig. 4 a (i)) is laboratory flat screen, dull and stereotyped proof press, forms to retain printing element on printing pressing plate by printing station and vavuum pump.Described printing pressing plate is suitable for comprising two magnetic orientation equipment (Fig. 4 a (ii): the equipment of insertion; (iii) equipment of removing).
The technical data of screen printing apparatus:
| The size of printing station | 650mm(L)x 550mm(W)x 420mm(H) |
| Weight | About 50KG |
| Power supply | AC220V，0.37KW |
| Maximum print area | 150mm x 150mm |
| Maximum sieve plate size | 460mm x 320mm |
| Panel size | 350mm x 250mm |
| Printable base material thickness | 0-25mm |
| Dull and stereotyped circumferential adjusting | X，Y：±10mm；Q：±3° |
| Adjustable angle of scraper plate | ±45° |
b. printing sieve
The silk screen of weaving based on sub-thread polyester (S) or polyester fine filaments (T) is sieved in described offset printing.
This sieve mesh can for example derive from Shanghai polyester printing mesh screen Co., Ltd (Shanghai Polyester ScreenPrinting Mesh Co., Ltd.).Following silk screen quality is successfully used:
| Silk screen type | Sieve mesh/inch | (μ m) in aperture | (μ m) for filament | (μ m) for deposit of ink |
| 61-64PW(T) | 155 | 90 | 64 | 30 |
| 77-48PW(S) | 195 | 77 | 48 | 28 |
| 77-55PW(T) | 195 | 67 | 55 | 24 |
| 90-48PW(T) | 230 | 56 | 48 | 19 |
| 120-31PW(S) | 305 | 49 | 31 | 17 |
As known in the art, described printing template makes on silk screen by photoresist technology.The serigraphy making is thus installed on aluminium frame with silk screen, and described aluminium frame is installed to dull and stereotyped proof press.
C. scraper plate
In following table, only there are scraper plate No.3 and No.4 to provide acceptable printing effect.Use No.3 (, Xiao A hardness is the polyurethane traditional screeds of 75 °) to obtain best effect.
d. magnet assembly
Described printing equipment comprises printing sieve (Fig. 4 a (i)), printing pressing plate (Fig. 4 b (i, ii)), magnet assembly (Fig. 4 c (i, ii)) and back-up block, and (Fig. 4 d).Magnet assembly and back-up block, and be formed together for the mechanical part of mobile magnet assembly, magnetic orientation equipment formed.
Printing pressing plate (Fig. 4 b (i, ii)) makes as having two parallel grooves, to hold and to locate two magnet assemblies.
Develop two standard magnet assemblies, to produce general and special pigment directional effect (Fig. 4 c (i, ii)):
Produce the magnet assembly of " rolling bar "-effect; And
Produce the magnet assembly of " light switch (light switch) "-effect or " 3D effect ".
The magnet assembly of " light switch " type can easily be applicable to produce other special effect.
Two back-up blocks are provided.Their major function is: i) housing magnetic components in position, and to allow it in rotary moving, ii) in groove, fill gap, to produce offset printing surface.
e. printing
In detail, for by using above-mentioned laboratory prototype equipment, be oriented in magnetic in ink or the coating composition on backing material plate or magnetizable particle and manufacture the method for mark, for example, can be used for manufacturing secure file, comprise following continuous step:
A) required magnet assembly is installed in back-up block, wherein said magnet assembly arranges as disclosed movably;
B) back-up block that magnet assembly is installed is inserted in printing pressing plate;
C) 2 horizontal handles are inserted in printing pressing plate and back-up block by hole, and it is contacted with the magnet assembly arranging movably, and rotating handle is so that magnet assembly is positioned at horizontal level;
D) above-mentioned disclosed offset printing sieve is installed on marking press, by come the position of fine adjustment magnet assembly according to the position adjustments printing pressing plate of the mark on printing pressing plate;
E) end of 2 handles is connected with the both sides of printing sieve respectively;
F) promote printing sieve, it produces the movement that is rotated down of magnet assembly by being connected with handle together, and loads substrate sheets printing on pressing plate;
G) reduce printing sieve, it produces the movement that rotates up of magnet assembly by being connected with handle together, and record (adjustings) substrate sheets with print the position of sieving;
H) on printing sieve, load UV solidified ink (comprising the magnetic paint of optically-variable) according to WO 2007/131833 and on sieve, move ink with scraper plate under lower pressure, thus with stamp together backing material plate be oriented in magnetic or the magnetizable particle in the ink layer of printing of printing process;
I) promote printing sieve, it produces the movement that is rotated down of magnet assembly by being connected with handle together;
J) that remove stamp from printing pressing plate and " magnetic orientation " base material, and by being exposed to the ink of sclerosis on base material under UV source (solidify, dry) printing;
K) repeating step f)-j) to manufacture the backing material plate of other printing.
Based on above-mentioned content disclosed herein, those skilled in the art can conceive other embodiment of the present invention, especially have larger print surface, exceed two magnetic orientation equipment and other automation and embodiment industrialized printing and magnetic orientation method.
Claims (23)
1. for the manufacture of a device for the magnetic of magnetic orientation in the ink or the coating composition that are included on backing material plate or the mark of magnetizable particle, this device comprises:
There is scraper plate, offset printing sieve and for accepting the flat screen screen printing apparatus of printing pressing plate of described backing material plate, this printing pressing plate has and faces the upper surface of described printing sieve and the first direction along its upper surface, and described backing material plate can unload in the direction; And
The magnetic orientation equipment that comprises multiple magnet assemblies;
Wherein, described magnetic orientation equipment is arranged on the below of the upper surface of described printing pressing plate, described multiple magnet assembly is along described first direction setting, all magnet assemblies can be shifted to the second place near the upper surface of described printing pressing plate together from the primary importance of the upper surface away from described printing pressing plate, and described scraper plate is that Xiao A hardness exceedes the hard scraper plate of 70 °.
2. device as claimed in claim 1, is characterized in that, the screen size of described printing sieve is 40-90 micron.
3. device as claimed in claim 1 or 2, is characterized in that, described magnet assembly can be between primary importance and the second place along moving back and forth with the horizontal second direction of the upper surface of described printing pressing plate.
4. device as claimed in claim 1 or 2, is characterized in that, the mode that described magnet assembly can move with front and back rolling between primary importance and the second place moves.
5. device as claimed in claim 4, is characterized in that, described device is configured to the movement of magnet assembly to synchronize and carry out with the unloading of the described backing material plate of coating, thereby prevents that the magnetic picture making on backing material plate is fuzzy.
6. the device as described in any one in claim 1,2 and 5, is characterized in that, described at least one, magnet assembly comprises texturing and the magnetized plate of permanent-magnet material.
7. device as claimed in claim 1 or 2, it is characterized in that, the mode that described magnet assembly can move with front and back rolling between primary importance and the second place move and wherein described at least one magnet assembly comprise texturing and the magnetized plate of permanent-magnet material.
8. device as claimed in claim 6, is characterized in that, described texturing with magnetized plate be composite, comprise polymer as construction adhesive and permanent-magnet powder as filler.
9. device as claimed in claim 7, is characterized in that, described texturing with magnetized plate be composite, comprise polymer as construction adhesive and permanent-magnet powder as filler.
10. device as claimed in claim 6, is characterized in that, described at least one, magnet assembly comprises the permanent magnet that at least one is additional, is arranged on and acts on the position of the intrinsic magnetic force antagonism between the magnetized plate of magnet and texturing.
11. devices as claimed in claim 8 or 9, is characterized in that, described at least one, magnet assembly comprises the permanent magnet that at least one is additional, is arranged on and acts on the position that the intrinsic magnetic force between the magnetized plate of magnet and texturing resists.
Manufacture the method for mark for 12. 1 kinds, the method comprises the following steps:
A) provide the device of any one in claim 1-11;
B) on the printing pressing plate of device, load backing material plate, this backing material plate is at least loaded with the wet ink or the coating composition that comprise magnetic or magnetizable particle on its part surface;
C) all magnet assemblies of device are shifted to the second place near the upper surface of printing pressing plate from the primary importance of the upper surface away from printing pressing plate together, thus magnetic or magnetizable granules of pigments in directed described wet ink or coating composition;
D) described magnet assembly is shifted to described primary importance backward;
E) unload described backing material plate from described printing pressing plate; And
F) solidify described wet ink or coating composition.
13. methods as claimed in claim 12, is characterized in that, the mode that the movement of described magnet assembly between primary importance and the second place moves back and forth with the horizontal second direction of edge and the upper surface of described printing pressing plate is carried out.
14. methods as claimed in claim 12, is characterized in that, the mode that the movement of described magnet assembly between primary importance and the second place moved with front and back rolling is carried out.
15. methods as claimed in claim 14, is characterized in that, being discharged in synchronous movement of the movement of described magnet assembly and described backing material plate carried out, thereby prevent that the magnetic picture making on backing material plate is fuzzy.
16. methods as described in any one in claim 12-15, it is characterized in that, the step of loading backing material plate on the printing pressing plate of device comprises the wet coating composition that at least part of use comprises magnetic or magnetizable particle or ink applies or the surface of stamp backing material plate
Wherein, the screen size of described printing sieve is 40-90 micron, and described scraper plate is that Xiao A hardness exceedes the hard scraper plate of 70 °.
17. methods as claimed in claim 16, is characterized in that, described coating or stamp are used the composition of the magnetic paint particle that comprises optically-variable to carry out.
18. methods as claimed in claim 16, is characterized in that, the step of described coating or stamp is to carry out together with the magnetic orientation of granules of pigments.
19. methods as claimed in claim 16, is characterized in that, described magnet assembly was shifted to printing pressing plate before the described backing material plate of stamp.
In 20. claim 1-11, the device of any one is for the manufacture of the purposes of mark, and this mark is manufactured by the magnetic orientation of the magnetic in the coating composition on file or magnetizable particle.
21. purposes as claimed in claim 20, is characterized in that, described file is selected from: bank note, valuable document, card, traffic ticket, passport, documentary evidence, current file, expenses of taxation file or Product labelling.
The file of 22. 1 kinds of printings, the mark that it comprises the magnetic orientation making according to the method for any one in claim 12-19.
The file of 23. printings as claimed in claim 22, is characterized in that, described file is selected from: bank note, valuable document, card, traffic ticket, passport, documentary evidence, current file, expenses of taxation file or Product labelling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010200496.9A CN102267277B (en) | 2010-06-03 | 2010-06-03 | Magnetic orientation and printing |
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| CN201010200496.9A CN102267277B (en) | 2010-06-03 | 2010-06-03 | Magnetic orientation and printing |
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| CN102267277B true CN102267277B (en) | 2014-11-26 |
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| KR101238198B1 (en) * | 2012-09-14 | 2013-02-28 | 한국조폐공사 | Magnetic security feature having 3d moving hidden image effect and the printing method thereof |
| CN103057253A (en) * | 2012-12-26 | 2013-04-24 | 汕头市金鑫包装科技有限公司 | Embossed pattern printing device |
| CN103171252B (en) * | 2013-03-29 | 2014-12-03 | 中钞油墨有限公司 | Magnetic positioning device on surface plate screen process press |
| ES2676049T3 (en) | 2014-08-22 | 2018-07-16 | Sicpa Holding Sa | Apparatus and methods for producing layers of optical effects |
| US20180264801A1 (en) * | 2015-01-16 | 2018-09-20 | Microsoft Technology Licensing, Llc | Formation of substrates having ink including magnetic material |
| CN107031175A (en) * | 2017-04-11 | 2017-08-11 | 京东方科技集团股份有限公司 | A kind of silk-screen printing mask plate, board, equipment and method for printing screen |
| CN108045080B (en) * | 2018-01-03 | 2024-05-03 | 虎彩印艺股份有限公司 | Relief three-dimensional color-changing anti-counterfeiting printing process and online printing equipment |
| CN108995365B (en) * | 2018-08-21 | 2019-11-08 | 厦门大学 | A kind of automatic three-dimensional on-line monitoring magnetic orientation device |
| CN111619210A (en) * | 2020-05-19 | 2020-09-04 | 韩艳丽 | Printing device |
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