EP0963287B1 - Form für das rotative bedrucken, beschichten oder prägen von bahnförmigen materialien und verfahren zur herstellung der form - Google Patents

Form für das rotative bedrucken, beschichten oder prägen von bahnförmigen materialien und verfahren zur herstellung der form Download PDF

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Publication number
EP0963287B1
EP0963287B1 EP98965190A EP98965190A EP0963287B1 EP 0963287 B1 EP0963287 B1 EP 0963287B1 EP 98965190 A EP98965190 A EP 98965190A EP 98965190 A EP98965190 A EP 98965190A EP 0963287 B1 EP0963287 B1 EP 0963287B1
Authority
EP
European Patent Office
Prior art keywords
process according
carrier
elastomer coating
coating
elastomer layer
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.)
Expired - Lifetime
Application number
EP98965190A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0963287A1 (de
Inventor
Heinz Lorig
Jörg RICHARD
Klaus Langerbeins
Alfred Ernst Link
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.)
Polywest Kunststofftechnik Saueressig und Partner GmbH and Co KG
Original Assignee
Sonderhoff Chemicals GmbH
Polywest Kunststofftechnik Saueressig und Partner GmbH and Co KG
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 Sonderhoff Chemicals GmbH, Polywest Kunststofftechnik Saueressig und Partner GmbH and Co KG filed Critical Sonderhoff Chemicals GmbH
Publication of EP0963287A1 publication Critical patent/EP0963287A1/de
Application granted granted Critical
Publication of EP0963287B1 publication Critical patent/EP0963287B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/18—Curved printing formes or printing cylinders
    • 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
    • B41N1/16—Curved printing plates, especially cylinders
    • B41N1/22—Curved printing plates, especially cylinders made of other substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation

Definitions

  • the invention relates to a method for producing a Form for rotary printing, coating or Embossing sheet-like materials, being on a carrier with a cylindrical surface on this one Elastomer layer made of a thermosetting silicone polymer is applied.
  • Shapes of the type mentioned above are different Applications.
  • Running as Printing form e.g. for high pressure, especially flexo printing, forms the outer surface of the engraved elastomer layer the color transfer surface.
  • the elastomer layer and its surface diverse requirements made for example, must they have sufficient resistance to any solvent contained in the ink, a good dynamic Behavior and color transfer behavior as well a slight swelling under the influence of the printing inks and quickly and easily after a printing process can be cleaned from the printing ink. All The requirements are similar if the shape for coating processes, for example as a transfer roller used for planographic printing, especially offset printing becomes.
  • the term “coating” here especially the transfer of inks within of printing processes, especially in flexographic printing, and the transfer of e.g. Lacquers or adhesives on web-shaped Materials are understood. It depends Requires both a full-area transfer as well a transfer only to selected areas conceivable.
  • the mold is used as an embossing mold the elastomer layer in particular has good dimensional stability and wear resistance even with the The usual temperatures of the embossing processes formative material and good separation behavior, around sheet-like materials with sufficient To be able to provide economy with embossments.
  • the elastomer layer can be easily engraved.
  • a printing press and a Imaging method for a printing press known the printing press in a printing unit being seamless Has image cylinder, which by means of a direct Imaging process within the printing unit with is coated with a dryable polymer.
  • the image cylinder can only be used in wet or dry offset printing used because of the polymer layer is very thin (typically 2 - 10 ⁇ m) and therefore engraved is impossible.
  • waterless offset printing are provided as polymeric silicones, where their property is that they are printing inks repel is essential.
  • EP 0 374 951 A2 discloses a process for the production a rotational form consisting of a carrier, on the outer surface of a thermosetting silicone polymer is applied after the shaping in the shaping Tool is networked. This is the tool for a predetermined time, for example about 10 minutes, to a predetermined temperature, for example 130 ° C, heated. After networking, the coated can now Carrier can be removed from the mold. The so made The product should preferably be used as a fixing and / or pressure roller for paper transport in a photocopier be used. A use of the form for rotary printing, coating and embossing is here not expressly disclosed.
  • the method disclosed here has the disadvantage that productivity in the manufacture of the mold is relatively low because of the thermosetting silicone polymer for a relatively long time within the shaping Tool must remain and because the shaping tool first preheated and then for a specific one Time at the specified temperature got to.
  • thermosetting is meant here and below be that those occurring during material hardening and / or temperatures to be used between about 80 ° C and 250 ° C.
  • the object is achieved according to the invention by Process of the type mentioned, which is characterized is that the material used to form the elastomer layer during its application and / or after its application to the outer surface of the carrier heat is supplied and a crosslinking by the supply of heat of the material is started and that the elastomer layer after hardening on its outer circumference to a cylindrical shape is machined and engraved.
  • the main advantage of the method according to the invention is that the quality of the elastomer layer is very good is achieved with very short production times. It has been shown that a thermosetting silicone polymer as a material for the production of an elastomer layer a mold for rotary printing, coating or embossing sheet-like materials is suitable and that the elastomer layer produced according to the invention fulfills all requirements. By that Material used to form the elastomer layer during its Application and / or after its application to the Shell surface of the carrier heat is supplied and that a networking of the material started by the supply of heat is ensured that the material is on the carrier first a relatively even layer forms and only then begins curing; thereby interfaces within the elastomer layer become safe avoided.
  • thermosetting materials are largely eliminated temperature-related restrictions when selecting the Materials for the carrier because those for hot curing required temperature only for relatively short Time must be applied. Therefore, for the wearer here also materials are used that were previously used were considered excluded for this purpose.
  • plastics which because their low heat resistance compared to metals earlier in this field of mold making were not used.
  • the use of plastics instead of metals for the carrier provides substantial Weight reductions in terms of transportation and handling the forms much easier.
  • the shapes are preferably seamless shapes; alternative the elastomer layer can also be made flat at first and then applied to the carrier in a curved shape, e.g. be stuck on.
  • the silicone polymer as a material to form the Elastomer layer in the form of a one-component material it is relatively easy to handle and its provision, preparation and application to the Carrier requires only a relatively minor technical Expenditure.
  • one-component materials usually shorter shelf life in purchase be taken.
  • the silicone polymer can also be used in the form of a two-component material. This makes longer shelf life advantageous enables what higher productivity allowed and lower manufacturing costs for the mold allows.
  • the use of two-component materials requires a slightly higher technical Effort for their preparation and application, what is but in the manufacture of large numbers of molds quickly amortized.
  • the material for Formation of the elastomer layer in a liquid or pasty Condition is applied to the carrier.
  • a further development provides that with one-component Material of this in a one-component dosing system is processed and that with two-component material its components in a multi-component dosing and -Mixing plant can be processed and prepared.
  • the usage Such a system makes the execution of the Technically comparative method according to the invention simple and reliable and offers an inexpensive and low-risk operation and thus a correspondingly inexpensive Execution of the procedure.
  • For the mixing process can optionally use a dynamic, driven mixing element or use a static mixer.
  • the method preferably provides that the material for the formation of the elastomer layer in a rotary casting process applied to the outer surface of the carrier becomes.
  • the rotational molding process for applying the The elastomer layer on the carrier is therefore special advantageous because it does not require any molds and so creating a seamless with simple means Form enables.
  • Rotary casting plants are known per se to the person skilled in the art, e.g. from coating technology.
  • the infusion in Form of a caterpillar-like shape describing a helix Material strand takes place.
  • the helical shape can be achieved in a simple manner in that the Carrier is rotated about its longitudinal central axis and that the carrier and the device issuing the strand of material or plant in the longitudinal direction of the carrier relative to each other be moved.
  • simple devices and drive means are sufficient here, that are inexpensive to manufacture and operate.
  • the heat is preferred to the material by means of thermal radiation fed without contact. Damage to the applied material layer are avoided. It also allows simple devices used to supply the heat, for example electrically operated radiant heaters.
  • the heat source for the supply of heat to the material can be part of the facility to apply the material to the carrier, then the start of the networking of the material already during its application to the carrier. alternative can be the heat source for supplying heat to the Material can also be a separate device in which the carrier completely coated with the material is transferred after completion of the coating, wherein then the material advances to the Carrier is applied and the crosslinking only afterwards is started. Finally, it is also possible use both heat sources one after the other to create a special one reliable heating and therefore a special one to ensure a safe and complete networking start.
  • Cooling medium e.g. Cooling air or cooling water
  • specially designed coolant channels be provided to provide the desired cooling enable.
  • the elastomer layer with a To produce thickness between about 1 and 5 mm.
  • the elastomer layer is advantageously thin, which economical material consumption guaranteed and with too contributes to low manufacturing costs for the molds.
  • the relatively small thickness of the elastomer layer ensures to minimize flexing of the elastomer layer during operation, which is essential contributes to the long service life of the molds become.
  • the quantity ratio between the material itself and the Filler or the fillers can mechanical and chemical properties of the elastomer layer in a wide range in the desired manner to be influenced.
  • At least one mineral is preferred as filler used because minerals are relatively inexpensive and on the other hand either by reaction with the material silicone polymer or its components the properties of the finished elastomer layer are positive influence or differ from the material silicone polymer behave chemically inert. Because of their chemical and physical properties of suitable minerals for use in the method according to the invention are e.g. Quartz powder, silica, calcium carbonate, talc, Mica or aluminum hydroxide.
  • a plastic sleeve is used as the carrier.
  • the usage of sleeves as supports for printing forms is on already known, but so far only in practice the field of rotogravure and offset printing forms or of Cliché sleeves with curved and glued cliché plates.
  • the sleeves can optionally be used on their inner circumference be cylindrical or slightly conical, as well known per se; the outer circumference of the finished form must in any case be cylindrical.
  • a plastic sleeve is used as the carrier, it is preferably one or more layers of elastomer and / or thermosetting materials in the form of foams and / or casting compounds. You can do this Materials, provided the shape is not an embossing shape the embossing of hot materials, such as thermoplastic films, should be used, quite sensitive to temperature be a vulcanization for the application of the outer elastomer layer as printing or transferring or embossing surface is not required; the Only the carrier, however, must be relatively short-term Heat application for hot curing the elastomer layer withstand.
  • metal sleeves are advantageously reusable by repeating them worked up, i.e. be re-coated.
  • a mixed construction of the carrier is also made Plastic and metal possible.
  • a metal cylinder can also be used as a support, e.g. made of aluminum or steel.
  • the hardened elastomer layer is engraved preferably by laser engraving because of this engraving process Can be carried out particularly quickly and inexpensively and because it is under the control of previously digitally stored Data is executable.
  • the surface of the elastomer layer of an inventive Shape can be engraved using laser beams. In order to meet those produced by the process described Shapes particularly well the demand for simpler and faster engraving.
  • the laser engravability of the elastomer layer set and optimize as desired. in the Ideally this happens when a focused one hits Laser beam on the elastomer layer an immediate selective evaporation and / or ashing without noteworthy Melt neighboring areas.
  • Component A Polysiloxanes containing vinyl groups 40 - 90% Amorphous silica 0.2 - 10% filler 0 - 70% platinum catalyst 0.01 - 3% Multi-functional vinyl compound 0.2 - 4% Ethyne retarder 0 - 5% zeolite 0.5 - 10%
  • Component B Multifunctional silane compounds 2 - 20%
  • Both component A and component B of this Materials according to the above example are separated storable from each other over many months. Will the Component A and component B to form the material, from which the elastomer layer is produced if mixed, there is initially no or practical no reaction of the components to one another, i.e. no hardening or crosslinking occurs yet. Only by heating to about 80 ° C, if no or very little ethine retarder used the networking is started, so that only then the hardening of the material begins. By a Increasing the proportion of the ethine retarder becomes the crosslinking start temperature raised.
  • the recipe shown in the example it can be mixed component A and component B also One-component silicone polymer material are made, which, however, is only a relatively short time, i.e. some Weeks, is storable. Even when it is designed as a one-component material occurs if no or very little Ethine retarder is used only after one Warming up to about 80 ° C and thus networking Curing of the material. A higher proportion of ethine retarders here too increases the crosslinking start temperature.
  • the usual temperature for crosslinking and curing the Silicone polymer materials according to the example is about 180 ° C; curing is possible in a temperature range, which ranges from about 80 ° C to a maximum of about 250 ° C extends.
  • the length of time over which this temperature must be present within the materials is relative short; in practice, this time period is even at large shapes no more than about 30 minutes. When a faster curing is desired, this is done by increasing the temperature attainable; vice versa with smaller ones Temperatures calculated a longer curing time become.
  • the system 1 consists of a machine bed 10, on which, similar to a lathe, on left end a headstock 11 and at the right end Tailstock 13 are arranged.
  • the headstock 11 is fixedly arranged on the machine bed 10; to the right protrudes from the headstock 11 a rotatably driven spindle 12 before.
  • the tailstock 13 at the opposite end of the machine bed 10 is in a sliding guide 13 ' in the longitudinal direction of the machine bed 10 and definable in desired positions.
  • a follower tip 14 rotatably mounted.
  • a core roller 30 is clamped by means of its stub axles 31, 32, so that when the spindle 12 rotates Core roller 30 also in the sense of the arrow 39 around their longitudinal central axis rotates.
  • a sleeve 33 is arranged, the for example by means of a pressure medium on the core roller 30 is raised and in the same way by this can be deducted.
  • the system 1 comprises an application device 2, which is supported on a support frame 25.
  • the support frame 25 is at its lower end on a longitudinal support 26 attached, along a sliding guide hidden here 26 'parallel to the slide guide 13' in the longitudinal direction of the machine bed 10 is movable.
  • the Application device Mixing head 22 supported, which is a dynamic mixing element with an electric motor drive 23.
  • To that Mixing head 22 lead several lines 21, in the present case Example two feed lines and two recirculation lines, through which the components of a two-component elastomer material from storage containers about at least partially elastic-flexible line areas transported to the mixing head 22 and if necessary, in particular in the event of interruptions to the order become.
  • Processing and processing takes place in the mixing head 22 Mixture of the elastomer material, which is then subsequently in the form of a strand of material 34 'by one under the Mixing head 22 arranged nozzle 24 on the outer circumference of the Sleeve 33 is applied.
  • the application takes place in the form a helix, the core roller 30 with the Sleeve 33 rotates in the direction of the arrow 39 and the Application device 2 by means of the longitudinal support 26 in Direction of the movement arrow 29 is moved.
  • the system 1 includes one with the support frame 25 connected radiant heater 27, the below of the already coated part of the sleeve 33 and which together with the longitudinal support 26 in Direction of the arrow 29 moves.
  • the radiant heater 27 gives its heat radiation to the surface of the Coating 34, whereby it is heated.
  • a predetermined temperature for example 100 ° C, reached or exceeded, is in this coating 34 the curing or crosslinking started.
  • Figure 2 shows in its lower part in cross section the machine bed 10.
  • the slide guide 13 'for the tailstock 13 which can be seen in the background.
  • the support frame 25 is attached, which is like a gallows up and then forward, i.e. in the Drawing to the right, extends.
  • the application device 2 is attached.
  • the connection between the application device 2 and the support frame 25 takes place on the mixing head 22.
  • the mixing head 22 open the feed lines 21, of which only two are visible here.
  • Above the mixing head 22 is the electric motor forming its drive 23 visible.
  • the nozzle 24 protrudes downward from the mixing head 22, down from the strand of material 34 'for production the elastomer layer 34 emerges.
  • the nozzle 24 is located itself at a short distance from the outer peripheral surface the sleeve 33, which is arranged on the core roller 30 is.
  • By the arrow 39 is the Direction of rotation of the core roller 30 with the sleeve 33 during the application of the elastomer layer 34 indicated.
  • the heat radiator 27 can be seen, the via a bracket not specifically numbered with the Support frame 25 is connected.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Making Paper Articles (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP98965190A 1997-12-18 1998-11-26 Form für das rotative bedrucken, beschichten oder prägen von bahnförmigen materialien und verfahren zur herstellung der form Expired - Lifetime EP0963287B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19756327 1997-12-18
DE19756327A DE19756327A1 (de) 1997-12-18 1997-12-18 Form für das rotative Bedrucken, Beschichten oder Prägen von bahnförmigen Materialien und Verfahren zur Herstellung der Form
PCT/EP1998/007647 WO1999032275A1 (de) 1997-12-18 1998-11-26 Form für das rotative bedrucken, beschichten oder prägen von bahnförmigen materialien und verfahren zur herstellung der form

Publications (2)

Publication Number Publication Date
EP0963287A1 EP0963287A1 (de) 1999-12-15
EP0963287B1 true EP0963287B1 (de) 2002-03-13

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ID=7852389

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Application Number Title Priority Date Filing Date
EP98965190A Expired - Lifetime EP0963287B1 (de) 1997-12-18 1998-11-26 Form für das rotative bedrucken, beschichten oder prägen von bahnförmigen materialien und verfahren zur herstellung der form

Country Status (9)

Country Link
US (1) US6616974B1 (da)
EP (1) EP0963287B1 (da)
JP (1) JP2001524901A (da)
AT (1) ATE214328T1 (da)
CA (1) CA2279370C (da)
DE (2) DE19756327A1 (da)
DK (1) DK0963287T3 (da)
ES (1) ES2174534T3 (da)
WO (1) WO1999032275A1 (da)

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DE19618367A1 (de) * 1996-05-08 1997-11-13 Benecke Kaliko Ag Verfahren zur Erzeugung eines elektrischen Steuersignals für eine Vorrichtung zur Erzeugung einer Tiefenstruktur in einer Werkzeugoberfläche
DE19625749C2 (de) * 1996-06-27 1998-12-17 Polywest Kunststofftechnik Verfahren zur Herstellung einer nahtlosen Druckform für den rotativen Hochdruck

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109078791A (zh) * 2018-10-06 2018-12-25 苏州市铭将意电子科技有限公司 一种计算机机箱生产用喷漆装置及喷漆方法
CN109078791B (zh) * 2018-10-06 2021-12-31 苏州亿安达精密塑胶制品有限公司 一种计算机机箱生产用喷漆装置及喷漆方法

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EP0963287A1 (de) 1999-12-15
DE59803332D1 (de) 2002-04-18
CA2279370C (en) 2007-07-03
JP2001524901A (ja) 2001-12-04
US6616974B1 (en) 2003-09-09
WO1999032275A1 (de) 1999-07-01
ATE214328T1 (de) 2002-03-15
ES2174534T3 (es) 2002-11-01
DE19756327A1 (de) 1999-07-01
DK0963287T3 (da) 2002-07-08
CA2279370A1 (en) 1999-07-01

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