DE7018732U - RUBBER CLOSE - Google Patents

Description

Continental Gummi-Werke Aktiengesellschaft, Hanover -

Rubber cliché

The invention relates to rubber clichés, in particular those which are used in rotary printing ζμΓ.

Rubber clichés for rotary printing made from solvent-containing rubber compounds that vulcanize during molding are known per se. In addition to the reproduction of printed text, they often also contain image reproductions produced by means of raster points. Due to the different contouring, one is often forced to use unvulcanized rubber mixtures of different structures in the production of such clichés, which run into one another during the subsequent vulcanization and are joined together. In letterpress printing and letterpress printing Rotav ms predominantly uniform t'arxersorten be printed with a plate, so that for the Klischeehersteil- _ώ · in general with a few, to the corresponding., Aforderungen tuned rubber mixtures manages.

The situation is different with modern printing processes that use different substrates such as paper and plastic films Or the like. Apply. For the production of such printed products ipt the traditional letterpress and Bach printing rotary process been modified.

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By using different BeiiruckGtoi'f ο at these :. Printing process v; er.ier. Different requirements for eic clichés - jcötfillt, which could only be met by a Yiolsr.hl of difference] i nuffjcbcuten unvarnished Guri.i: iiud dandruff. Lie? =: ^ Jilt inr.btconciere for the Wiericr ^ abc of picture: '. Otiven, insbcEonaoro colchcn, eic also Holbfonfi i .. ". Druc": einv.ar.di'rei v.'ieiorjcbc'n coil on , many of ur.tei-Echiedlichen requirements bt \ the erhf.ber. nucgrbiluetcn hac-tei points. Should: -. ExampleEveirc very fine 'Ac faults on plate Beöruckstoi.'e, ν: ϊο ? .. 3. Kuitc: tof Tolicii, in particular Polyäthylc-nfolien, ü'oortr .- ^ oi-. -..- or., : x. ~ - die Rncterun ^ · p.nclorc Iii ^ er.coha.rten aufv.'oif: '". τ., il: v.cr.ri Voi *:";; ic! ^1st ': - v; eicc?; i - ^: cr Cbcr.li'.che morose 3eiruc'.: ito; "fc, \ 'ie Ζ.Ξ .. T-cricr vtrv. ¹ c. nc! et wo rc. he..

D-: b: -!:. Vj'.r.tlich vulkand sierbrr einjectellt '', unvulicaniciertc Kautncr.u 'r'i.'jci.un ^ Dr. kr.irc lai.jp Ln ^ er; .rit v; o /; ori r ^1. ! · in them erthnj tcnen Vul: -. &riii; r..tior. «components ^ ert-ittnn, became a L- . ^ preservation f which unites for all;: fill properly. differently r-built Gur.ir:ir..ischunccr. ur. '. / irtsch ". ' Z design cloth.

The üriiridur. ^ Lict calibrate the Aui '^ ro'. ^, c ^ 'öcllt, ciece fiir iic: ü.iccheehercteller seemingly insurmountable difficulties auozurr'umei: und on the other side printed image: T -7er hcr ^ ectellen Gtunmiklicchees to improve.

The Erf incur.- reads the task by dv-ih at. ier lierF.tellur.jT Ce ?. Cu:: iklicchees eir.c uniform, aiii a ~ ute Schriltbil: ".- v: i et heigh; einccr.tell te Kautr.chuk-.iiachurif; we used ''! Unc 'only eic surface of the Kli.cheobcreichQ, the tor V'xjior ^ rbc

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from Rr.sterpur.kte containing pictorial niotiv-V / iedcr ^ aben dier.t, out of a cew-W-th printed material adapted, i "their Hla.stisit ^: it3- and / or Hurtei ^ enschnften in the vulcanized state . aas used for other cliché Gii:; rr.ir: ischun ^ abweichendon Hicchunc in a thin layer.

The basic structure of the Guinmiklischees makes it possible to produce even tone reproductions through differently shaped key points, which are ir.with the previous ones. Gumnd-1'.IiDGhCCC only with difficulty and with the use of particularly expensive Gurnrr.ir. '. Icchun ^ cn overtakes v / crnen'. '. Onntcn, so that in addition to the achieved, ΐΐΐ tionalicicrun ^ des lierstellun ^ svorcances and the maintenance of the situation you Substantial and significant savings can be achieved, the layering of the ICLiche in the area of the image reproductions is very likely & vch the reason for the fact that the albums are much clearer than this was previously the case.

Those for the production of the printing foils, which are partly used for Alr'.okkunf; the cliché upper parts used v / ground, used Polyr-eronmischunt'ß " l.ör.nen dsn for the Kcrstnllur.g of the rest of the Klisohocc used correspond or also be constructed differently than these. For example, it is possible for the production of Clichés Guumimischür.jcn'r.uf based on butyl rubber or butadiene-acrylonitrile-gopolymeric products and for the production of printing foils with vulcanizable properties based on butadiene-acrylonitrile-gopolynierisatcii

se in: Mixture with polyvinyl chloride, not vulcanizable discontinued blends of polyvinyl chloride rr.with butdiene-acrylonitrile copolymers or other thermoplastic Kunctstoi-e, such as z.3. Polyvinyl alcohol odor the like.

If the mixtures used for the production of the clichés and the film are "related", that is to say if they contain the same or similar polymers, a perfect connection between film and cliché body is achieved through heat treatment and, if necessary, vulcanization during removal. Is the use of special. Ilaftvcrmittel necessary for the various. 'Jcrkr.toffkoir.binationen or. calibratable known and not Gecenstcnd of the invention, this can be undone by corresponding verforir.ung Lömincseir.striche before u'ar ^ ⁰ ^ ⁰¹ and Coe ^^^ ^11-0 ^^ - ¹ VUI knniüation dec clichés ar. the desired connection disc. herctollcn.

The application; of the printing film according to the invention during the setting up; The cliché turns out to be remarkably simple, in that the egg appearing on the cat is covered with one of these preferably ce: 'ir ^ i ^: .! -; ij over'o ^ cr.don the foil surface and then on the device surface ": e the vi \ T.r'xnisbaren te nurr.r.ir.icchung in? ογρ- oinor plate intended for the production of the cliché on the hangover, so that the Vull..ir.iG'itior. a ^ .r, Klircliee.-: the Klicchoooccrurs ±: r. area of the Γοΐΐοη edges ^ f'irucktechnicai.e egg ^ er.cchr.itnn owns.

In a preferred execution: the 3rfinounc exists for the Foil production used V / Erkctoff from cinev. vul-injectable einsente-il.tor. Blend of polyvinyl chloride and butyncliene-acrylonitrile-copoly-erites, since such 7ci * intersections

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we still cry because vulcanization has a high elasticity, ir. theirs HKrto r.urch J'indcrun [; dor. Vorrchnittver) - '. Iltnionou freely adjustable sine] unci in this way in bozuß on asG Ptoctcroilc. and the materials to be printed -lusjev.'ä'.lt ·. ·: ■ .; roe η kor.nen. Sio are particularly preferred, v; er.n. for the Mrrctellun ^ dec lilirchco ^ rur-ol-orpors · Kriutcohuliir.irschur.tcn on Ö2r Basin of 3utcdion-acrylonitril-Gopolyr.erisaten verv: ends v / ground.

For example, in the case of a printer, polyethylene film as a printing film is used as a gccor. Over dttv. Klischecv / Erkstoff v.'critely harder mixed mixture used; the upper "lache ^ o.'öscro Br." ruc! · '-vicrkctoff a ^ e ^ cnübcr the. Klic-chcevorkEtofΓ - .. eiclitr eiü cctellt foil before :: uct be, d? Calibrate these bcr.ser the r.ehr or \ .ciiii-_er rough surface <\ ss Popiers! .. it don einsolnoü Rctei \ uukten

In order to take advantage of the advantages of the printing film in the printing process :, c'.ie ir.i we.ventlichcn on the hardness and elasticity differences ce ^ enubcr eier .: K ^ -iachcG material are based, reddish full eucsucchöpfer., \ / Ii * d the erfiniiunvcijcn'öse slide ir.b '~ lich ^ t düjin r.uccectrltet ur.d ir: thicker, of 0.05 bic 0.3, preferably ur. 0, y i.r. vcrv.-en-Iet.

l'it the inventuiic l & sser. there are also further difficulties at the Kliochcehorctellur.-j verr.eidcn and the ^ -arxlität c.er: .. it the cliché-generated prints are improved. Collen example-sv / eice on eir.er. Klirchee r ^ hrcrc pictures of different ^ uslitüt, inrjboGor.dorc- in terms of Ilnlbtonv / icier ^ r.be, i.e. also

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are essentially relation to the shape of the halftone dots, ■> rgebracht?, it is now possible to easily, even and by using different printing films for the different images to achieve better print reproductions, because now a simple manner, for example harder or softer, more or less elastic surface parts of the cliché can be produced and used next to one another depending on the requirements of the print image.

When using the modified rotary printing process, step various difficulties also with regard to the solvents contained in the paints in this respect, i.e. for the production of the color mixtures, depending on the substrate to be used, solvents often have to be used that are destructive the commonly used cliché material work. In particular These solvents act in the field of writing and image reproduction.

The route taken according to the invention, parts of the process with the printing inks Providing the cliché surface that comes into contact with film covers also provides a remedy here by continuing education According to the present invention, the entire cliché surface with an inventive, especially insensitive to these solvents Foil coating is provided, where appropriate for the areas or font reproduction in their printing technology Properties differ from the areas of image reproduction Foil parts can be used. For example, when using ketones or esters, especially acetates, Foil coatings based on polyvinyl alcohol have proven particularly effective.

As already shown, for the cliché heretofore under Urr.stündcr. the possibility of having a large number of foils with different types of printing iron in stock. It is possible, and is within the scope of the invention, to use the non-voidable: ar.ized, but vulcanized but vulcanized rubber-coated, p.gerbeständici ^cr heart-shaped plates that can be used as printed matter. and to keep in stock as diec itchenü tufeebauten at entr /, the Hcrstellunr the Klincheekb'rper fjr vorv.-encietcn ju "r.ipl = itten r.35-lich v; ary Infolci of G ^or C i ^{n en} de thickness. - Foils v / other from fle.v. Klicchee ^ round body v / ährcnd der VJarnverforn.un ^; un-5 ^ oijcbGr.er.fall "Vulcanization sufficient vulcanizing agent as a result of deo vorhaidenen Konsentrationßcef; illeg in the foils, ur. there, too, sufficient vulcanization is ensured. This makes it possible to obtain the concentration of the components required for vulcanization or they are quite mc ^ i all en Ir. cC s · How can bciGpiolsv / else, the content of accelerators and / or Scliv-efel essential lowered · the invention here is the well-known Tatsacho night Eunutze that by IIorobraetRung the Konzontration ninJ at least one of the Vul!: r.:. irr.tion:; ': o ::: vonor.tcii - ". ic stability improved v.-ird,

The drawing explains an extract from £ hrur.ijccc-ispic \ f'nr Fulfillment of a cliché, with da.:, A Gru: -. I3.kö'r? Cr 1 in Range from .'ir. r.t he dotted ßili. '. Jioi'.orjnbcr. r; .it eir.cr

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Claims (3)

1. Rubber cliché, especially for use in rotary printing with areas intended for text and image reproduction, characterized in that the areas of the cliché surface r '''of a coating which are intended for image reproduction are verseher, which are' in their elasticity and / or Hardness properties differ from the material used to manufacture the cliché base. 2. rubber cliché according to claim 1, characterized in that the Coating in a thickness of 0.05 to 0.8, preferably 0.05 mm, [ ! is upset. S. 3. rubber cliché according to claims 1 and 2, characterized in that the main component of the polymer material in the mixture of the cliché base corresponds to that in the top layer. H. Rubber cliché according to Claims 1 to 3, characterized in that different surface areas serving for image reproduction are covered with coatings of different elasticity and / or hardness. Hanover, December 22, 1970
70-32 G / Sb Sb / Pa