CN102267277A - Magnetic orientation and printing - Google Patents
Magnetic orientation and printing Download PDFInfo
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- CN102267277A CN102267277A CN2010102004969A CN201010200496A CN102267277A CN 102267277 A CN102267277 A CN 102267277A CN 2010102004969 A CN2010102004969 A CN 2010102004969A CN 201010200496 A CN201010200496 A CN 201010200496A CN 102267277 A CN102267277 A CN 102267277A
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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 the secure file print field, relate to printing process and relevant printing equipment, specifically be silk-screen printing device, be used to print the security feature based on ink, described security feature is included in the ink of sclerosis or the granules of pigments of the magnetic orientation in the coating composition.
Background technology
The granules of pigments of the magnetic orientation in printing and ink that solidify is known as the security feature that is used to protect valuable document.Also become known for making the 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 of the rotary printing that is used for 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 behind for example conventional offset printing device, in order to before the described ink of sclerosis (dry, solidify), give the magnetic that is included in the 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, still be not disclosed in the magnetic orientation device that combines dull and stereotyped screen printing apparatus and magnetic orientation equipment in the single processing station.On the other hand, flat screen lithographic plate screen printing apparatus has the wide industrial purposes, therefore the magnetic orientation equipment that is suitable for working together with such printing equipment is had long-term demand.
Summary of the invention
Device of the present invention is suitable for making ink or the magnetic of the magnetic orientation in the coating composition or the mark of magnetizable particle that is included on the backing material plate, and this device comprises:
Have scraper plate, offset printing sieve (flat printing screen) and be used to accept the flat screen screen printing apparatus of the printing pressing plate of described backing material plate, this printing pressing plate has the upper surface that faces described printing sieve and along the first direction of its upper surface, can unload described backing material plate in the direction; And the magnetic orientation equipment that comprises a plurality of magnet assemblies.
Described magnetic orientation equipment is arranged on the below of the upper surface of described printing pressing plate, described a plurality of magnet assembly is along described first direction setting, and all magnet assemblies can be from shifting to the second place near the upper surface of described printing pressing plate together away from the primary importance of the upper surface of described printing pressing plate.
In this manual, term " magnetic " is meant it itself is the material of magnetic field sources.Term " magnetizable " is meant that reaction produces the ferromagnetic or ferrimagnetic material in magnetic field, itself is not the material of magnetic field sources.
In first main embodiment of the present invention, described magnet assembly can be between the primary importance and the second place along with the upper surface of described printing pressing plate laterally the second direction of (preferred vertical) move back and forth.The base material of described coating can only unload when 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 quicken manufacturing process, in second main embodiment of the present invention, the mode that described magnet assembly can move with the front and back rolling between the primary importance and the second place moves.The mode of using this front and back rolling to move, described magnet assembly move backward and the unloading of the base material of described coating can be carried out in that accompany, synchronous moving, thereby prevent that the magnetic picture that makes on the backing material plate is fuzzy.
Preferably, at least one magnet assembly comprises texturing and the magnetized plate of permanent-magnet material, as disclosed among the 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, at least one magnet assembly comprises texturing and the magnetized plate of permanent-magnet material, comprise at least one additional permanent magnet, be installed in and act on the position that the intrinsic magnetic force between the magnetized plate of magnet and texturing resists, disclosed as 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, this safe composition comprises the magnetic paint particle of directed optically-variable.Magnetic paint particle (OVMP) that it should be noted that optically-variable can be used for protecting secure file such as bank note, valuable document, card, traffic ticket, passport, documentary evidence, file, expenses of taxation file and Product labelling pass through.
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, (the form that (top-cut) cut on its top that has irregular platelet that average diameter is the 15-20 micron and 25-35 micron usually when ink or coating composition comprise the magnetic of optically-variable or magnetizable granules of pigments, and thickness is 1 micron the order of magnitude), the order footpath of the sieve mesh of serigraphy must be chosen as and allow the magnetic or the magnetizable particle safety of optically-variable not to damage printing quality by sieve.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, preferred 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 the 15-20 micron.
Described scraper plate must be " firmly " type, and Shore (Shore) A hardness is above 70 °.When printing, softer vane material can be out of shape, thereby causes excessive ink transfer to base material, causes bluring, if the fine rule feature is not complete obiteration.Preferred plastic scrapers, particularly polyurethane scraper plate are because of it has better printing effect than rubber flap.
In addition, also disclose the method for making mark, this method may further comprise the steps:
A) provide device of the present invention;
B) load backing material plate on the printing pressing plate of device, this backing material plate is loaded with wet ink or the coating composition that comprises magnetic or magnetizable particle at least on its part surface;
C) will install all magnet assemblies together from shifting to the second place away from the primary importance of upper surface of printing pressing plate near the upper surface of printing pressing plate, thus magnetic or magnetizable granules of pigments in directed described wet ink or the coating composition;
D) described magnet assembly is shifted to described primary importance backward;
E) from the described backing material plate of described printing pressing plate unloading; And
F) solidify described ink.
In this manual, term " wet ink or coating composition " expression is applied on the base material, but the coating composition of also unhardened (curing, drying).
One of the inventive method preferred embodiment in, described magnet assembly moving between the primary importance and the second place can be carried out along the mode that moves back and forth with the horizontal second direction of the upper surface of described printing pressing plate.
The inventive method another preferred embodiment in, described magnet assembly between the primary importance and the second place move can before and after the mode that moves of rolling carry out.The mode of using this rolling to move, described magnet assembly move and the unloading of described backing material plate can be carried out in synchronous moving, thereby prevent that the magnetic picture that makes on the 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 to the surface of small part with the wet coating composition that comprises magnetic or magnetizable particle or ink coating or stamp backing material plate.
Another preferred embodiment in, described coating or stamp use mesh size to be the 40-90 micron, the offset printing of preferred 50-70 micron is sieved and is carried out.
Another preferred embodiment in, described coating or stamp use the magnetic paint grains of composition comprise 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 making mark, coat magnetic in the composition or the magnetic orientation of magnetizable particle by file and carry out.
Described file can specifically be a secure file, is preferably selected from: bank note, valuable document, card, traffic ticket, passport, documentary evidence, current file, expenses of taxation file and Product labelling.
Description of drawings
Fig. 1 a-1d: schematically described according to an embodiment of the invention, by at magnetic or the magnetizable particle device of making mark of magnetic orientation on the backing material plate in ink or coating composition;
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 the top;
Fig. 4 a-4d: show prototype according to the device of an embodiment of the invention;
Fig. 5 a-5g: described all kinds according to the serigraphy sieve mesh of each embodiment of the present invention;
Fig. 6: described cross section by the monofilament mess printing sieve mesh that is 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.
The specific embodiment
Below, further explain device of the present invention and printing process with reference to accompanying drawing.
Device of the present invention is suitable for making ink or the magnetic of the magnetic orientation in the coating composition or the mark of magnetizable particle that is included on the backing material plate, and this device comprises: have scraper plate, offset printing sieve and be used to accept the flat screen screen printing apparatus of the printing pressing plate of described backing material plate.This printing pressing plate has the upper surface that faces described printing sieve and along the first direction of its upper surface, can unload described backing material plate in the direction.Described magnetic orientation equipment is arranged on the below of the upper surface of described printing pressing plate, and described a plurality of magnet assembly is along the first direction setting along described upper surface.All magnet assemblies can be from shifting to the second place near the upper surface of described printing pressing plate together away from the primary importance of the upper surface of described printing pressing plate.
In addition, the method that is used to make mark of the present invention may further comprise the steps:
A) provide device of the present invention;
B) load backing material plate on the printing pressing plate of device, this backing material plate is loaded with wet ink or the coating composition that comprises magnetic or magnetizable particle at least on its part surface;
All magnet assemblies that c) will install are together from shifting to the second place near the upper surface of printing pressing plate away from the primary importance of upper surface of printing pressing plate, thus magnetic or magnetizable granules of pigments in directed described wet ink or the coating composition;
D) described magnet assembly is shifted to described primary importance backward;
E) from the described backing material plate of described printing pressing plate unloading; 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 the below (position of removal) shift near the printing pressing plate position (position of using), make the magnetic field infiltration of magnet assembly print the backing material plate of pressing plate and setting on it, thereby be oriented in wet ink or magnetic in the coating or the magnetizable granules of pigments of using on the described backing material plate.As those skilled in the art obviously as can be known, the printing pressing plate must be permeable to static magnetic field.
Should also be noted that not only directedly, also be magnetic or the position of magnetizable particle also can be subjected to the influence in magnetic field, 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 or more arrangement thick and fast in the space.Even this has explained why (for example, the soft magnetism carbonyl iron particles (it is not preferred orientation in magnetic field) under) the situation can obtain magnetic " orientation " image, referring to WO 2005/002866 at spheric granules.In fact, observed in this case image is the particle density image.
An importance of the present invention is that magnetic orientation equipment comprises a plurality of magnet assemblies.This is that the technical limitations of method for printing screen is required, only supports each backing material plate single printing to pass through, and dry immediately.Wet backing material plate that it should be noted that stamp contacts the mark that can cause having printed already with any secondary of printing sieve and fogs.On the other hand, can on same backing material plate, print the project of many repetitions usually, thereon with two Size Distribution; Therefore, the project of each printing needs its oneself magnet assembly, and all magnet assemblies must move in the magnetic orientation technical process together.
Described orientation equipment further is set, makes method for printing screen and magnetic orientation method to carry out together.
For the orientation of fixed magnetic or magnetizable granules of pigments in comprising its coating composition, ink or coating must subsequently by the sclerosis (drying).In order to reach this purpose, the base material of coating must be cured processing, preferred radiation curing such as light poly-(for example, UV solidifies) or electronic beam curing.As those skilled in the art obviously as can be known, described coating composition must be chosen as and for example can be cured according to the curing mechanism of selecting.
Described curing can be undertaken by radiation on the printing pressing plate, and the base material that applies can unload from the printing pressing plate subsequently.But preferably, described base material solidifies from the unloading of printing pressing plate and by specifically-built drier equipment.When from printing pressing plate unloading base material, must be noted that to relatively move because of base material and the magnet assembly under it are contingent causes the magnetic orientation image blur that makes.Therefore, described magnet assembly must removed before the described base material by this way in unloading: do not darken or damage before the magnetic paint directional images that makes.
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, wherein magnet assembly mobile is chosen as sometimes pure and moves back and forth and between pure rolling moves.It should be noted that this can realize by rotation (rotating shaft) center of selecting aptly to be used for magnet assembly.Select an one radius can realize the embodiment that pure rolling moves away from the rotating shaft on the plane of moving substrate, wherein, base material tangentially moves, and is consistent with magnet assembly, and accompanies with the latter.Select the rotating shaft on the plane of close moving substrate can realize the pure embodiment that moves 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 that move of pure rolling between moving at the rotating shaft of certain position between the described end points.
Most preferred magnetic or magnetizable particle are the magnetic paint particles of optically-variable among the present invention, 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 such as bank note, valuable document, card, traffic ticket, passport, documentary evidence, file, expenses of taxation file and Product labelling pass through.The magnetic paint particle of described optically-variable has the form of irregular platelet, and average diameter is the 15-20 micron, and cut on the top with 25-35 micron, and thickness is 1 micron the order of magnitude.
In particularly preferred embodiments, the method that is used to make mark comprises print steps, and the ink or the coating composition that wherein comprise magnetic or magnetizable particle are applicable on the backing material plate.In this special embodiment, provide described backing material plate to comprise to small part wet ink or coating composition coating or its surperficial step of stamping that comprises magnetic or magnetizable particle.
More preferably, described coating or stamp are carried out serigraphy and are realized by using suitable offset printing sieve, scraper plate and described ink or coating composition 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 this method, described magnet assembly is to shift to before the mobile scraper on the ink printing sieve printing pressing plate of flat-panel devices.This causes being used for the maximization of 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, schematically described separately according to of the present invention and be used for by ink or the magnetic of coating composition or the embodiment that magnetizable particle is made mark of magnetic orientation on backing material plate, preferred second main embodiment, and show the embodiment of printing process.
In Fig. 1 a, the backing material plate 5 that is used to stamp is loaded in the printing pressing plate 1 of flat board, dull and stereotyped screen process press.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 the printing position, and printing sieve 2 is positioned at low level, and scraper plate 3 moves on the ink 4 on the sieve 2, stamp backing material plate 5.Described magnet assembly 6 is positioned at removed position.
In Fig. 1 c, backing material plate 5 is positioned at the 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, magnetic or magnetizable particle in the ink of directed printing.
In Fig. 1 d, backing material plate 5 printing and orientation 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 directed state.
Below referring to Fig. 2 a-2c, it schematically shows the interchangeable embodiment of the printing process of using identical device.
In Fig. 2 a, the backing material plate 5 that is used to stamp is loaded in the printing pressing plate 1 of flat board, dull and stereotyped screen process press.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 the printing position, and printing sieve 2 is positioned at low level, and scraper plate 3 moves on the ink 4 on the sieve 2, stamp backing material plate 5.Described magnet assembly 6 is positioned at the position of using, and is oriented in magnetic or magnetizable particle in the ink of printing together with printing process.
In Fig. 2 c, backing material plate 5 printing and orientation 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 directed state.
Below referring to Fig. 3 a-3c, it schematically shows printing process, from the top:
In Fig. 3 a, the backing material plate 5 that is used to stamp is loaded in the printing pressing plate l of flat board, dull and stereotyped screen process press.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 the printing position, and printing sieve 2 is positioned at low level, and scraper plate 3 moves on the ink 4 on the sieve 2, stamp backing material plate 5.Described magnet assembly is positioned at the position of using, and is oriented in magnetic or magnetizable particle in the ink of printing together with printing process.
In Fig. 3 c, backing material plate 5 printing and orientation 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.
Below referring to Fig. 4 a-4d, it shows the prototype according to the device of an embodiment of the invention.
Fig. 4 a shows BMSP-150M flat board, dull and stereotyped screen printing apparatus with three different views (i)-(iii), 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 shows printing pressing plate according to the device with rotatable magnet assembly of second main embodiment of the present invention with two different views (i)-(ii):
(i) in " position of using ";
(ii) at " removed position ".
Fig. 4 c shows according to the embodiment of the present invention rotatable magnet assembly with two different views (i)-(ii):
(i) be used for making " rolling bar " feature;
(ii) be used for making " light switch " or " 3D " feature.
Fig. 4 d shows the back-up block that is used for according to the magnetic orientation equipment that exemplifies of the device of second main embodiment of the present invention with three different views (i)-(iii):
(i) do not have the magnet assembly of insertion
The magnet assembly that (ii) has insertion in " position of using "
The magnet assembly that (iii) has insertion at " removed position ".
Below referring to Fig. 5 a-5e, it has described the dissimilar serigraphy sieve mesh that can be used in the different embodiment of the present invention:
A) first kind multifibres woven fabric;
B) the second class multifibres woven fabric;
C) monofilament calendering sieve mesh;
D) cross section of calendering sieve mesh;
E) electroplate the multicellular metal foil that forms.
Described offset printing sieve can be the known any type in serigraphy field, and it comprises frame, get by for example timber or preferred aluminum, and the serigraphy sieve mesh that this frame carried.Described serigraphy sieve mesh, the carrier of printing template specifically can be porous, thin woven fabric, multifibres (Fig. 5 a-5b) or monofilament (Fig. 5 c) sheet, is made by nylon, polyester or stainless steel.The monofilament frame of low elongation polyester or stainless steel framework most preferably.Perhaps, described serigraphy sieve mesh can be chemical etching, laser-induced thermal etching, or electroplate the multicellular metal foil (Fig. 5 e) that forms, for example stainless steel foil.
The sieve and the metal parts that contact with the base material of printing ink and/or printing should be nonmagnetic substances, conflict with magnetic paint and any of magnetic orientation method in order to avoiding.
The feature of described serigraphy sieve mesh also is 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 lower than the twice of filament diameter usually to a certain extent, because the staggered fluctuation of filament allows some vertical extruding (calenderings: Fig. 5 d).
The serigraphy sieve mesh is a critical elements of the present invention, and it must be chosen as has suitable order footpath and thickness to be used to print the magnetic that comprises most preferred optically-variable or the ink or the coating composition of magnetizable granules of pigments.The film thickness of the deposit of ink of printing (in order to allow the easy orientation of particle) 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 the aperture is the 50-70 micron in the present invention.
Therefore, the preferred screen size that is used for serigraphy sieve mesh of the present invention is the 40-90 micron, most preferably the 50-70 micron.
The preferred grit number of described sieve mesh is 150-300 sieve mesh/inch (a 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 the 30-70 micron, most preferably the 45-55 micron.
Below referring to Fig. 5 f-5g, the dissimilar serigraphy sieve mesh template that can be used for each embodiment of the present invention has been described:
F) computer-sieve printing template;
G) photoresist printing template.
Below referring to Fig. 6, it has described the cross section by the monofilament mess printing sieve mesh that is loaded with photoresist printing template.This printing template is the carrier of printing information.It is advantageously made by photoresist process, wherein, whole serigraphy sieve mesh applies with photoresist in the first step, described photoresist is taken a picture in second step and is exposed to printing information (plus or minus, depend on the resist type), the resist of Bao Luing is at the 3rd step chemical development, from the zone of wanting printing ink it is optionally removed from the serigraphy sieve mesh then.The result is the sieve mesh (Fig. 5 g) that is loaded with the printing template.Perhaps, described template also can be by non-selectively applying whole sieve mesh, then optionally the coating of the mechanically cutting ink that will print is made, and perhaps even more advantageously makes (computer-riddler's skill, Fig. 5 f) by directly carry out optionally ink jet printing on sieve mesh.
Below referring to Fig. 7, it has described the effect of vane material.Fig. 7 a has described the situation of plastic scrapers, and it is hard, not distortion when being presented at printing.Such scraper plate has been guaranteed to contact with the line of compass screen surface in scraping technology, causes transferring to the accurate measurement of the ink on the base material, that is, the ink that only is included in the sieve mesh is transferred on the base material.The result is uniform deposit of ink and accurate image.As further advantage, this plastic scrapers be presented at be included in ink in solvent pass in time when contacting and almost do not expand.
Fig. 7 b has described the situation of rubber flap, and it is soft, flexible, is deformed into a kind of contract (contacting with the compass screen surface opposite) in printing operation, forces other ink by the sieve mesh on the base material.The result is uneven deposit of ink and the image with fuzzy edge.As further shortcoming, this rubber flap can be included in ink in solvent pass in time when contacting and expand.
Below referring to Fig. 8, it shows the printing effect with four kinds that provide in the following table dissimilar scraper plate gained.All printing uses the printing ink of identical substrate material, identical printing sieve, the identical optically-variable that contains above-mentioned flake pigment and identical printing condition to realize.
Fig. 8 a is to use soft (Shore A is 60 °), and naphthalene diisocyanate Unitex Ulon scraper plate (deriving from the special Justin Lemberg group (Trelleborg Group) of Britain) obtains, as generally being used on the rotary screen forcing press.
Too much ink is by this scraper plate deposition, as can see the whippletree that almost disappears of these disadvantageous features such as letter " T " and the inner ring that almost disappears in disadvantageous feature.
Fig. 8 b is to use soft (Shore A is 65 °), and rubber flap (deriving from Tianjin Hua Yu (Huayu) company of Chinese Tianjin) obtains.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; In the disadvantageous feature some are still too narrow.
Fig. 8 c is to use firmly (Shore A is 75 °) polyurethane traditional screeds (deriving from Sheng Zehua space (Shenze Huayu) company in Sheng Ze county, Chinese Hebei province) to obtain.
This scraper plate has provided fabulous printing effect, makes to obtain best balance between the solution of ink density and unfavorable feature.
Fig. 8 d is to use firmly (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, and is obviously lower but cost is an ink density on base material.
Therefore, having that best scraper plate required printing sieve, that be used to print ink type of the present invention selects is hard scraper plate, its Xiao A hardness surpasses 70 ° (" Xiao A hardness " is meant a kind of in the 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 making mark, by magnetic in the magnetic orientation coating composition on file or magnetizable particle.Described file can specifically be a secure file, preferred 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, is made of to keep printing element on the printing pressing plate 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; The equipment of (iii) 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 |
| The 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 is sieved
Described offset printing sieve is based on the silk screen of weaving of sub-thread polyester (S) or polyester fine filaments (T).
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:
| The silk screen type | Sieve mesh/inch | Aperture (μ m) | Filament (μ m) | Deposit of ink (μ m) |
| 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 the photoresist technology.The serigraphy that makes thus is installed on the 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 (that is, Xiao A hardness is 75 ° a polyurethane traditional screeds) to obtain best effect.
D. magnet assembly
Described printing equipment comprise printing sieve (Fig. 4 a (i)), printing pressing plate (Fig. 4 b (and i, ii)), magnet assembly (Fig. 4 c (i, ii)) and back-up block (Fig. 4 d).Magnet assembly and back-up block, and the mechanical part that is used for mobile magnet assembly is formed together, and forms magnetic orientation equipment.
((i ii)) makes to having two parallel grooves Fig. 4 b the printing pressing plate, to hold and to locate two magnet assemblies.
Developed two standard magnet assemblies, with produce pigment directional effect general and special use (Fig. 4 c (and 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 and produce other special-purpose effect.
Two back-up blocks are provided.Their major function is: i) housing magnetic components in position, move to allow its rotation, and ii) in groove, fill the gap, to produce the offset printing surface.
E. printing
In detail, be used for, be oriented in the method that ink on the backing material plate or the magnetic in the coating composition or magnetizable particle are made mark, for example can be used for making secure file, comprise following continuous step by using above-mentioned laboratory prototype equipment:
A) required magnet assembly is installed in back-up block, wherein said magnet assembly is provided with as disclosed movably;
B) back-up block that magnet assembly will be installed inserts in the printing pressing plate;
C) 2 horizontal handles are inserted in printing pressing plate and the back-up block by the hole, and it is contacted with the magnet assembly that is provided with 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 the printing pressing plate;
E) end with 2 handles is connected with the both sides of printing sieve respectively;
F) promote the printing sieve, it produces by being rotated down of the magnet assembly that is connected with handle mobile together, and loads substrate sheets on the printing pressing plate;
G) reduce the printing sieve, it produces by rotating up of the magnet assembly that is connected with handle mobile together, and the position of record (adjusting) substrate sheets and printing sieve;
H) loading UV solidified ink (magnetic paint that comprises optically-variable) on the printing sieve and on sieve, moving ink under the lower pressure according to WO 2007/131833 with scraper plate, thus with stamp together backing material plate and be oriented in magnetic or magnetizable particle in the ink layer of printing of printing process;
I) promote the printing sieve, it produces by being rotated down of the magnet assembly that is connected with handle mobile together;
J) that remove stamp from the printing pressing plate and " magnetic orientation " base material, and by being exposed to the ink of sclerosis on base material under the UV source (solidify, drying) printing;
K) repeating step f)-j) to make 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 bigger print surface, surpass two magnetic orientation equipment and other automation and embodiment industrialized printing and magnetic orientation method.
Claims (20)
1. the device of the mark of the magnetic of a magnetic orientation that is used for making the ink that is included on the backing material plate or coating composition or magnetizable particle, this device comprises:
Have scraper plate, offset printing sieve and be used to accept the flat screen screen printing apparatus of the printing pressing plate of described backing material plate, this printing pressing plate has the upper surface that faces described printing sieve and along the first direction of its upper surface, described backing material plate can unload in the direction; And
The magnetic orientation equipment that comprises a plurality of magnet assemblies;
Wherein, described magnetic orientation equipment is arranged on the below of the upper surface of described printing pressing plate, described a plurality of magnet assembly is along described first direction setting, all magnet assemblies can be from shifting to the second place near the upper surface of described printing pressing plate together away from the primary importance of the upper surface of described printing pressing plate, and described scraper plate is that Xiao A hardness surpasses 70 ° hard scraper plate.
2. device as claimed in claim 1 is characterized in that, the screen size of described printing sieve is the 40-90 micron, preferred 50-70 micron.
3. device as claimed in claim 1 or 2 is characterized in that, described magnet assembly can be between the 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 the front and back rolling between the primary importance and the second place moves.
5. device as claimed in claim 4 is characterized in that, described device construction is that the unloading of the backing material plate of the mobile and described coating of magnet assembly is carried out synchronously, thereby prevents that the magnetic picture that makes on the backing material plate is fuzzy.
6. each described device in the claim as described above is characterized in that at least one described magnet assembly comprises texturing and the magnetized plate of permanent-magnet material.
7. device as claimed in claim 6 is characterized in that, 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.
8. as claim 6 or 7 described devices, it is characterized in that at least one described magnet assembly comprises the permanent magnet that at least one is additional, be installed in and act on the position that the intrinsic magnetic force between the magnetized plate of magnet and texturing resists.
9. method of making mark, this method may further comprise the steps:
A) provide among the claim 1-8 each device;
B) load backing material plate on the printing pressing plate of device, this backing material plate is loaded with wet ink or the coating composition that comprises magnetic or magnetizable particle at least on its part surface;
All magnet assemblies that c) will install are together from shifting to the second place near the upper surface of printing pressing plate away from the primary importance of upper surface of printing pressing plate, thus magnetic or magnetizable granules of pigments in directed described wet ink or the coating composition;
D) described magnet assembly is shifted to described primary importance backward;
E) from the described backing material plate of described printing pressing plate unloading; And
F) solidify described ink.
10. method as claimed in claim 9 is characterized in that, the move mode that with edge and the upper surface of described printing pressing plate horizontal second direction move back and forth of described magnet assembly between the primary importance and the second place carried out.
11. method as claimed in claim 9 is characterized in that, the move mode that with front and back rolling move of described magnet assembly between the primary importance and the second place carried out.
12. method as claimed in claim 11 is characterized in that, described magnet assembly move and being discharged in synchronous the moving of described backing material plate carried out, thereby prevent that the magnetic picture that makes on the backing material plate is fuzzy.
13. as each described method among the claim 9-12, it is characterized in that, the step of loading backing material plate on the printing pressing plate of device comprises to the surface of small part with the wet coating composition that comprises magnetic or magnetizable particle or ink coating or stamp backing material plate
Wherein, the screen size of described printing sieve is the 40-90 micron, preferred 50-70 micron, and described scraper plate is that Xiao A hardness surpasses 70 ° hard scraper plate.
14. method as claimed in claim 13 is characterized in that, described coating or stamp use the magnetic paint grains of composition that comprises optically-variable to carry out.
15., it is characterized in that the step of described coating or stamp is to carry out together with the magnetic orientation of granules of pigments as each described method among the claim 13-14.
16., it is characterized in that described magnet assembly was shifted to the printing pressing plate as each described method among the claim 13-15 before the described backing material plate of stamp.
17. each device is used to make the purposes of mark among the claim 1-8, this mark is made by the magnetic orientation of magnetic in the coating composition on the file or magnetizable particle.
18. purposes as claimed in claim 17 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 and Product labelling.
19. the file of a printing, it comprises the mark of the magnetic orientation that makes according to each method among the claim 9-16.
20. the file of printing as claimed in claim 19 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 and 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 CN102267277B (en) | 2014-11-26 |
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| WO2014101250A1 (en) * | 2012-12-26 | 2014-07-03 | 深圳市铂纳包装有限公司 | Embossed pattern printing device |
| CN104813338A (en) * | 2012-09-14 | 2015-07-29 | 韩国造币公社 | Magnetic security element having three-dimensional moving hidden image effect and method for printing same |
| WO2016112529A1 (en) * | 2015-01-16 | 2016-07-21 | Microsoft Technology Licensing, Llc | Formation of substrates having ink including magnetic material |
| CN106573272A (en) * | 2014-08-22 | 2017-04-19 | 锡克拜控股有限公司 | Apparatus and method for producing optical effect layers |
| 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 |
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| CN108045080A (en) * | 2018-01-03 | 2018-05-18 | 虎彩印艺股份有限公司 | A kind of embossment solid color-changing anti-counterfeit typography 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 |
| CN108995365A (en) * | 2018-08-21 | 2018-12-14 | 厦门大学 | A kind of automatic three-dimensional on-line monitoring magnetic orientation device |
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