EP2879882A2 - Matériau de tamisage plat et tamis - Google Patents

Matériau de tamisage plat et tamis

Info

Publication number
EP2879882A2
EP2879882A2 EP13728975.7A EP13728975A EP2879882A2 EP 2879882 A2 EP2879882 A2 EP 2879882A2 EP 13728975 A EP13728975 A EP 13728975A EP 2879882 A2 EP2879882 A2 EP 2879882A2
Authority
EP
European Patent Office
Prior art keywords
screen
strands
screen material
filling
points
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13728975.7A
Other languages
German (de)
English (en)
Other versions
EP2879882B1 (fr
Inventor
Heinz Brocker
Hans-Rudolf Frick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gallus Ferd Rueesch AG
Original Assignee
Gallus Ferd Rueesch AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gallus Ferd Rueesch AG filed Critical Gallus Ferd Rueesch AG
Publication of EP2879882A2 publication Critical patent/EP2879882A2/fr
Application granted granted Critical
Publication of EP2879882B1 publication Critical patent/EP2879882B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/24—Stencils; Stencil materials; Carriers therefor
    • B41N1/247—Meshes, gauzes, woven or similar screen materials; Preparation thereof, e.g. by plasma treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/36—Screens, Frames; Holders therefor flat

Definitions

  • the invention relates to a screen material with the above-mentioned features of
  • the square mesh When used in the field of filtration, the square mesh is the usual embodiment. For the printing application, this mesh has been adopted. With the available photo layers and well-known coating methods, a reasonable image resolution can only be achieved with a large number of "supports.” Therefore, increasingly high mesh fabrics are used.
  • the solar cell coating requires a high paste application and a precise and fine image resolution. For example, for applying printed conductors as current fingers with the smallest possible coverage of the solar cells, in order to ensure a high efficiency of the solar cells.
  • the screens or fabrics used for electronic printing are very expensive and delicate to process, making them unsuitable for the production of screen printing plates for rotary screen printing.
  • the lack of suitability is also due to the fact that the screen fabric in the rotary screen in one direction, namely the
  • Cylinder longitudinal axis can be stretched, in flat screen printing, however, however, in two dimensions.
  • rotary screen printing the color is transported through the screen by the hydrodynamic pressure generated by the rotation of the screen and by the squeegee in front of the squeegee.
  • Such a rotary screen printing unit is described for example in WO 99/19146 AI.
  • Stainless steel mesh used with linen weave.
  • the ratio of sieve opening, contact area and fabric thickness has proven to be suitable.
  • the thickness of the structure ie the fabric thickness (initial dimension before calendering) corresponds approximately to twice the wire thickness.
  • the basic structure is processed in a further step in a calendering process, also referred to as a calendering process, and thus adjusted to the desired
  • Vernickelungsvorgang the fabric for the purpose of a higher wear resistance is generally uniform, ie symmetrical to the axis of the fabric threads, reinforced and increases the support points in the region of the crossing points.
  • methods are also known for selective deposition only in one direction, perpendicular to the surface of the tissue.
  • Rotary screen printing are metallized by means of galvanic processes.
  • the state of the art for nickel plating is that preferably sulphamate nickel baths or chemical nickel processes (external powerless) are used.
  • the advantage of this method is a uniform geometric layer distribution in all spatial planes.
  • the disadvantage of this method is that at the crossing point a so-called angle weakness, hereinafter also referred to as an undercut, arises.
  • the undercut has the property that the flow behavior, eg at
  • the Watt's nickel sulphate baths are mixed with a wide variety of, preferably organic, additives.
  • the additives are subdivided into gloss additives (so-called glossy carrier) first (primary) and second (secondary) class.
  • gloss additives so-called glossy carrier
  • Primary glossy supports which incidentally may also have properties of second-class luster carriers, are used to achieve homogeneous metal deposition with a specific base luster over as wide a current density range as possible.
  • Secondary glosses have a large influence on the leveling and gloss level.
  • first and second class gloss supports have, in combination, other effects on the deposited nickel layer: gloss, ductility, hardness,
  • Coating process is not a solution, since the openings of the fabric grow and it can come when used by screen printing for clogging of the openings by paint particles. This will affect the print quality.
  • the object of the present invention is therefore to provide a sieve material and a sieve which do not have the disadvantages of the sieve materials and sieves known from the prior art and are particularly suitable for rotary screen printing.
  • the screen materials in particular steel mesh, should have a higher stability and a longer service life for use in rotary screen printing.
  • a sieve material with the features of claim 1 and by a sieve with the features of claim 1. are particularly advantageous since They meet the specific requirements of rotary screen printing and have a greater stability compared to conventional screen materials and screens.
  • the flat screen material according to the invention is used in screen printing, in particular in rotary screen printing.
  • the screen material has skewed and intersecting strands which form a woven screen structure, the invention being independent of the weave and the invention
  • the strands form undercuts, wherein undercuts mean the inner edges of adjacent surfaces of the intersecting strands, for example of warp threads and weft threads. These thus have an angular weakness, which is also referred to as inner edge weakness.
  • the strands are arranged so that a screen structure is formed with openings. Throughout their surfaces, the strands have a coating of approximately constant thickness of metal, particularly nickel, which has been deposited on the strands in a plating process.
  • the areal sieve material is designed in such a way that, in the region of crossing points of the strands, their undercuts, in addition to the coating, at least partially have a filling of the metal applied in a plating process.
  • a respective filling forms an inner edge transition with a rounding.
  • the metal filling is thus designed so that there are no sharp edges or chamfers in the area of the undercuts. It is particularly advantageous if the fillings have a radius of at least 1 ⁇ m or at least one tenth of the mean radius of the strands (mean value of radius warp thread and radius weft thread). This ensures that in screen-printing applications, the ink can easily flow through the screen material and there are no significant deposits in the area of the undercuts, and the screen material is easy to clean, with high stability.
  • a curve along the surface of the screen material - in a sectional plane perpendicular to the screen material and viewed through one of the strands - describes a smooth curve.
  • a smooth curve is understood to mean a smooth curve in the mathematical sense, i. a curve that is continuous and differentiable, ie a curve without corners or abrupt turns.
  • a curve along the surface of the screen material - in a sectional plane parallel to the screen material and viewed through all the strands - describes a smooth curve.
  • a smooth curve is understood to mean a smooth curve in the mathematical sense, i. a curve which is continuous and differentiable, i. a curve without corners or abrupt twists.
  • the undercuts at the top and / or at the bottom of the screen material each have a metallic padding.
  • the undercuts in the plane of the screen material each have a metallic filling.
  • the curve along the surface of the screen material has two Turning points on, with the turning points limit the replenishment.
  • Turning point is understood as a turning point in the mathematical sense, i. a point on the surface curve in which a sign change of the first derivative takes place.
  • the turning points may in particular have a distance from each other of at least 1 ⁇ and a maximum of a distance corresponding to the pitch. By division, the distance between the center axes of two adjacent, mutually parallel strands is called. In particular, however, the turning points are 10 to 20 ⁇ spaced apart. Refills that fall into this area are on the one hand
  • parabolic fill which itself has an undercut.
  • the sieve material in the region of a respective undercut is filled up to a particularly high degree and reinforced.
  • the fillings are designed in such a way that the surfaces of the fillings on the surface and / or on the underside of the sieve material are in each case almost in one plane.
  • the metal fill causes the strands to be completely embedded in the metallic padding.
  • a calendering process also referred to as a calendering process, is understood to mean a process which generally rolls and which causes a flattening of the sieve structure.
  • the flat screen material is formed by a tissue, for. B. by a
  • Plastic fabric or a metal wire mesh The structure has the form of so-called meshes, e.g. B. of rectangular mesh or square mesh.
  • the strands are made of metal at their surfaces, with nickel being particularly advantageous and therefore preferred.
  • the metal was deposited on the strands in a galvanization process.
  • a fabric structure is preferably metallized with one or more, in particular nickel-containing layers of only one electrolyte bath, wherein the electrolyte bath for
  • the formation of the nickel layer is further influenced by the tissue is moved past the non-anode side of the fabric on non-conductive bodies, ie insulators, which change the field and thus influence the nickel deposition. During the passage, the fabric structure rests on the insulator. Also, the anodes can be arranged so that they have a different distance to the tissue over their extent. Thus, the nickel layer distribution in the
  • Nickel plating process, specific dosage of brighteners first and second class and targeted flow through the electrolyte, the current lines of the electric field can be influenced so that specifically more nickel can be deposited on the anode-facing side of the fabric in the crossing points.
  • it can furthermore be achieved that a single strand of the fabric is nickel-plated eccentrically, with a stronger coating also taking place here on the side facing away from the anode.
  • the coating can be carried out in a single process step. This is especially true when applying thin ones
  • Nickel layers of a few micrometers advantageous.
  • the invention also relates to a screen for rotary screen printing, which is made of a flat screen material, as described above, and wherein the screen has the shape of a cylindrical sleeve.
  • Photopolymer layer provided so that an imaging is made possible by methods known in the art.
  • Fig. 2a a screen material before nickel plating
  • Fig. 3a is a sectional view with a section perpendicular to the screen material
  • Fig. 3b shows a detailed view of Fig. 3 a
  • Fig. 3 c is a detail of Fig. 3 a before filling Fig. 4a
  • Fig. 5 is a sectional view with a section in the plane of the screen material
  • Fig. 6 is a screen for rotary screen printing
  • Fabric structure 5 is to be applied.
  • the basis for the nickel plating may be a Watt nickel electrolytic bath to which preferably primary and secondary brighteners are added:
  • Secondary luster such as Butynediol derivatives, quaternary pyridinium derivatives, propargyl alcohol, propynol propoxylates, especially butynediol, and primary brighteners, e.g. Benzenesulfonic acids, alkylsulfonic acids, alylsulfonic acids, sulfonimides,
  • Secondary brighteners are used in this application for the defined reinforcement of the crossing points 10, these being added depending on the desired reinforcement in a content of 0 to 0.15 g / 1, primary brightener between 0 and 8 g / 1.
  • the fabric structure 5, which is pretreated as usual in electroplating, is nickel-plated with the bath described above.
  • the fabric 5 is transported in the nickel bath via an electrical non-conductive support surface.
  • the electrically non-conductive support surface can be provided transversely to the transport direction of the fabric 5 with segments which are also filled with electrolyte during operation and ensure a permanent exchange of electrolyte.
  • Nickel deposition 3 impeded.
  • Metal deposition 3 additionally targeted in the crossing points 10th
  • the nickel deposition 3 can be distributed over the crossing points or the entire back.
  • Anodenabgewandten side can be done.
  • An ideal anode distance is between 1 cm and 40 cm to the cathode. This distance is advantageous in that the tissue 5 can still be sufficiently strongly flowed with fresh electrolyte, the electrical voltage losses through the increased
  • Anode distance however, remain at a tolerable level.
  • the nickel plating can basically take place in a single nickel cell. However, it is also conceivable to arrange several nickel cells one behind the other.
  • Fig. 1 shows an inventive sheet-like screen material 1, which is provided on one side with a photo-polymer coating 2 (direct template). In a not shown Alternatively embodiment, an already imaged film can be applied to the screen structure 1 (indirect template).
  • the nickel-plated planar screen material 1 is constructed from a fabric.
  • a sheet-like screen material 1 is shown, which is formed from interwoven strands 5.
  • the strands 5 are arranged at right angles to each other and at a distance, so that openings 6 are formed in the flat screen material 1.
  • the region in which the strands 5 arranged at right angles to one another meet or push against one another is referred to as the intersection point 10.
  • Inner edge weakness also referred to as an angle weakness, the result, which has a negative impact on stability, flow properties and cleaning ability of the flat
  • FIG. 2a a Cartesian coordinate system xyz is given, wherein the flat screen material 1 is in the xy plane.
  • the z-axis is oriented orthogonal to this plane.
  • FIG. 2b shows the flat screen material 1 from FIG. 2a.
  • the undercuts 11 were provided in the intersection points 10 according to the invention by selective deposition each with a padding 12.
  • the targeted deposition can be carried out in particular in the context of the galvanic production of the metal coating 3.
  • FIG. 3a shows a section through the flat screen material 1 in the xz plane or in the yz plane: the warp threads 5.1 and weft threads 5.2 are each provided with a
  • Metal coating 3 provided. As indicated in Fig. 3c, the layer thickness of the metal coating a, b, c on the upper surface (upper side 28) and the lower surface (lower side 29) of warp yarn 5.1 and weft yarn 5.2 may be uniform or different. By different layer thicknesses a, b, c of the metal coating 3, the properties of the flat screen material 1 can be influenced. Also, the diameters 26, 27 of warp yarns 5.1 and weft yarn 5.2 can be either of the same size or of different sizes. Here too, influence can be exerted on the weave structure and thus on the properties of the flat screen material 1. As further geometric variables, in FIG.
  • the neutral fiber 20 is defined by the wire longitudinal section and the division 21, which defines the distance between two center axes of strands 5 (FIG. 5.1).
  • the undercuts 1 which can still be seen in FIG. 3 c, have been provided with a filling 12 according to FIG. 3 a by selective deposition. This results in an inner edge transition with rounding 12.1, wherein the rounding has a radius 25. Inside edges, chamfers, incisions or undercuts were removed and the
  • the fillings 12 of the undercuts 1 1 can be seen more clearly: if the curve along the surface of the screen material 1 is considered in the embodiment according to FIG. 3 b, then two points of inflection are in the region of a respective filling 12 22, which are turning points in mathematical understanding. Stated another way: between the turning points 22 there is a filling 12 of the undercut 11, outside the turning points 22, however, the warp thread is 5.1 or the weft 5.2 with the usual metal coating 3 of layer thickness a, b, c provided.
  • the filling 12 produced by targeted deposition has - approximately in the middle between the two turning points 22 - the largest filling strength 24, which is measured between the surface of the filling 12 and the theoretical vertex of the undercut 11.
  • FIG. 4 a shows alternative galvanic coatings i, ii, iii, iv.
  • the padding 12 is parabolic.
  • the Auf colllbine the padding 12 in the region of the original undercut 1 1 is particularly large.
  • the padding 12 is designed such that through the filling further has an undercut, which is formed by the filling of an inner edge.
  • a particularly strong galvanic coating was applied to fill 12 of the undercut 1 1.
  • the padding 12 is so extensive that the surface of the padding 12 lies in a plane 30 and the warp threads 5.1 and the weft threads 5.2 completely in the metal coating 3, 12 are embedded.
  • a flat screen material 1 is created, which has a flat surface which lies in the plane 30.
  • the undercut 1 1 was provided with a particularly strong padding 12.
  • the padding 12 has an inner edge transition with rounding 12.1.
  • the padding 12 has an inner edge transition with rounding 12.1.
  • the rounding has a particularly large radius.
  • the coating alternative iv can be used alternatively or in combination with the previously described coating alternatives.
  • a reinforced metal coating 3 takes place, so that the metal coating 3 has a particularly high layer thickness on one side, that is, the coating is applied eccentrically.
  • Fig. 4b a strongly calendered sheet sieve material 1 is shown. Before the fabric of warp yarns 5.1 and weft yarns 5.2 with the metal coating 3, the fabric was rolled and thus flattened. This calendered surfaces 5.3, ie flattened areas were created. Since even under a calendered fabric after the metal coating 3 undercuts 1 1 in the region of the crossing points 10, the alternatives described above for the galvanic coating can be used equally here. As shown, the undercuts 1 1 leave on the bottom 29 of the sheet material 1 in its original state, while at the top 28 of the sheet material 1, the undercuts 1 1 were each provided with a padding 12.
  • FIG. 5 shows a section through the flat screen material 1 in the xy plane, ie in the plane of the flat screen material 1.
  • the flat screen material 1 has warp threads 5.1 in the region of the crossing points 10 and weft 5.2 also undercuts 11.
  • These undercuts 1 as described above, and shown in the lower part of Fig. 5, also with fillings 12, ie targeted deposits are provided.
  • the fillings 12 may have an inner edge transition with rounding 12.1, wherein the padding 12 may be limited by two turning points 22 and may have a radius 25.
  • a screen 4 is indicated with a flat screen material 1 in a cylindrical sleeve shape for rotary screen printing.
  • the screen material 1 is held by unspecified tails in its cylindrical shape. Inside the screen 4 is a - not visible here - squeegee to squeeze paint through the screen material.
  • the orientation of the doctor blade may be parallel to the axis of rotation of the screen 4.
  • the rotation U of the screen 4 during printing is indicated by a double arrow.
  • metal coating e.g., nickel

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Textile Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Screen Printers (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Abstract

L'invention concerne un matériau de tamisage plat (1) destiné à être utilisé au cours d'une sérigraphie, comprenant des barres (5, 5.1, 5.2) formant une structure de tamisage tissée, disposées à angle droit les unes par rapport aux autres et se croisant en points d'intersection (10). Les barres (5, 5.1, 5.2) forment à cet endroit des contre-dépouilles (11) et d'ordinaire une structure de tamisage pourvue d'ouvertures, et sont constituées, au moins à leurs surfaces, de métal (3), lequel a été déposé sur les barres (5, 5.1, 5.2) au cours d'un processus de galvanisation. Selon l'invention, dans la zone des points d'intersection des barres (5, 5.1, 5.2), les contre-dépouilles (11) de celles-ci possèdent au moins en partie un remblayage (12) composé de ce métal et appliqué au cours du processus de galvanisation. Ce remblayage peut former en particulier une transition d'arête arrière avec un arrondi (12.1). Les remblayages permettent d'améliorer les propriétés du matériau de tamisage en particulier en matière de stabilité, de débit et de possibilité de nettoyage. L'invention concerne également un tamis (4) pour la sérigraphie rotative, composé d'un tel matériau de tamisage plat (1).
EP13728975.7A 2012-06-14 2013-06-12 Matériau de tamisage plat et tamis Active EP2879882B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012011901A DE102012011901A1 (de) 2012-06-14 2012-06-14 Flächiges Siebmaterial und Sieb
PCT/EP2013/001723 WO2013185916A2 (fr) 2012-06-14 2013-06-12 Matériau de tamisage plat et tamis

Publications (2)

Publication Number Publication Date
EP2879882A2 true EP2879882A2 (fr) 2015-06-10
EP2879882B1 EP2879882B1 (fr) 2018-12-19

Family

ID=48626407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13728975.7A Active EP2879882B1 (fr) 2012-06-14 2013-06-12 Matériau de tamisage plat et tamis

Country Status (8)

Country Link
US (1) US9333740B2 (fr)
EP (1) EP2879882B1 (fr)
JP (1) JP6157604B2 (fr)
CN (1) CN104364088B (fr)
DE (1) DE102012011901A1 (fr)
DK (1) DK2879882T3 (fr)
ES (1) ES2711556T3 (fr)
WO (1) WO2013185916A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110214088A (zh) * 2016-12-06 2019-09-06 株式会社Nbc纱网技术 丝网版及其制造方法
CN108121862B (zh) * 2017-12-13 2021-04-27 武汉益模科技股份有限公司 一种基于三维几何特征的工程图自动标注方法
TWI759109B (zh) * 2021-02-18 2022-03-21 倉和股份有限公司 配合圖形之印刷網版及其製作方法
CN115008883B (zh) * 2021-03-05 2024-03-26 仓和精密制造(苏州)有限公司 配合图形的印刷网版和制作方法

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US3482300A (en) * 1966-10-31 1969-12-09 Screen Printing Systems Inc Printing screen and method of making same
US3759799A (en) * 1971-08-10 1973-09-18 Screen Printing Systems Method of making a metal printing screen
JPS5333933A (en) * 1976-09-11 1978-03-30 Kouji Doi Method of producing mesh cylinder for rotary screennprint by aligning metallic filaments* etc* to cross one another and plating them to secure cross points
JPS54156880A (en) * 1978-05-04 1979-12-11 Kenseido Kagaku Kogyo Kk Production of sleeve for rotary screen printing
JPS5613196A (en) * 1979-07-05 1981-02-09 Toshin Kogyo Kk Seamless tubular screen for printing and production thereof
NL8005427A (nl) 1980-09-30 1982-04-16 Veco Beheer Bv Werkwijze voor het vervaardigen van zeefmateriaal, verkregen zeefmateriaal alsmede inrichting voor het uitvoeren van de werkwijze.
DE3441593A1 (de) 1984-11-14 1986-05-22 Ferd. Rüesch AG, St. Gallen Verfahren und vorrichtung zum herstellen von siebdruckgeweben fuer siebdruckzylinder
DE8511549U1 (de) * 1985-04-18 1986-06-19 Ferd. Rüesch AG, St. Gallen Siebdruckschablone
DE4020046A1 (de) * 1990-06-23 1992-01-09 Messerschmitt Elmar Siebdruck-schablonentraeger, gewebe aus dehnbaren, verschiebbaren faeden/draehten
US5365840A (en) 1990-10-03 1994-11-22 Newman Donald E Screen material for and method of screen printing
ES2183401T3 (es) 1997-10-14 2003-03-16 Gallus Ferd Ruesch Ag Mecanismo de serigrafia.
JP2005199604A (ja) * 2004-01-16 2005-07-28 Ngk Insulators Ltd スクリーン印刷版、及びそれを用いた複層膜体の製造方法
JP2007210219A (ja) * 2006-02-10 2007-08-23 Komori Corp ロータリースクリーン装置の版材及びその製造方法
NL2003627C2 (en) * 2009-10-12 2011-04-13 Stork Prints Bv Screen printing.
DE102010021062A1 (de) * 2010-05-19 2011-11-24 Gallus Ferd. Rüesch AG Flächiges Siebmaterial und Sieb

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Also Published As

Publication number Publication date
WO2013185916A2 (fr) 2013-12-19
JP6157604B2 (ja) 2017-07-05
CN104364088A (zh) 2015-02-18
CN104364088B (zh) 2016-07-06
US9333740B2 (en) 2016-05-10
WO2013185916A3 (fr) 2014-02-20
DE102012011901A1 (de) 2013-12-19
US20150096451A1 (en) 2015-04-09
ES2711556T3 (es) 2019-05-06
EP2879882B1 (fr) 2018-12-19
JP2015527215A (ja) 2015-09-17
DK2879882T3 (en) 2019-03-18

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