DK172268B1

DK172268B1 - Method for printing packaging parts

Info

Publication number: DK172268B1
Application number: DK140095A
Authority: DK
Inventors: Erik Hougaard Madsen
Original assignee: Danapak Holding As
Priority date: 1995-12-08
Filing date: 1995-12-08
Publication date: 1998-02-16
Also published as: DK140095A

Description

DK 172268 B1DK 172268 B1

FREMGANGSMÅDE TIL TRYKNING AF EMBALLAGEDELEPROCEDURE FOR PRINTING PACKAGING PARTS

Opfindelsen angår en fremgangsmåde til trykning af emballa-5 gedele af den i krav 1's indledning angivne art.The invention relates to a method of printing packaging parts of the kind set forth in the preamble of claim 1.

Det er almindelig kendt i forbindelse med tøroffsettrykning af emballagedele, især plastlåg, at føre lågene enkeltvis via frembringere/kædekassetter, hvori de enkelte lågdele er 10 placeret, frem til en trykkesektion, hvor selve tør-offsettrykningen foregår. Frembringerne er anbragt på kæder med en afstand svarende til omkring 2 lågs længde. Normalt er der 20 til 30 frembringere til at transportere lågene fra ilægningsstakkene og frem til restakker. Forud for 15 trykningen er der således foregået en udstansning af lågene samt en stakning. Selve trykningen foregår ved, at frembringerne fører et enkelt låg frem til selve trykkesektionen, hvor en tryksko går ned i lågspejlet og afsætter sit tryk. Dernæst transporteres emballagen videre, og stak-20 ning foretages, efter at tørring er foretaget.It is generally known in connection with dry-offset printing of packaging parts, especially plastic lids, to pass the lids individually via generators / chain cassettes in which the individual lids are located, to a printing section where the dry offset printing itself takes place. The generators are placed on chains at a distance equal to about 2 layers in length. Usually there are 20 to 30 generators for transporting the lids from the loading stacks to the left stacks. Prior to the printing, there was thus a punching of the lids and a stacking. The printing itself takes place by producing a single lid leading to the printing section itself, where a printing shoe descends into the lid mirror and exits its pressure. Next, the packaging is further transported and stacked after drying.

Denne kendte teknik har således den ulempe, at den involverer to stakningsarbejdsgange og tillige, at trykket foregår på de enkelte låg, når disse føres frem i kassetter.This prior art thus has the disadvantage that it involves two stacking operations and also that the pressure takes place on the individual lids when they are advanced in cassettes.

25 Lågene bliver ved de kendte metoder enkeltvis monteret i kassetter og herefter igen fjernet fra disse kassetter. Dette betyder, at der er megen mekanik i form af stakker, restakker og kassetter. I praksis betyder det, at stabiliteten ikke er tilfredsstillende, når hastigheden skal være 30 høj. Processen er således uhensigtsmæssig ressource- og tidskrævende samt omkostelig.By the known methods, the lids are individually mounted in cassettes and then again removed from these cassettes. This means that there is a lot of mechanics in the form of stacks, rest stacks and cassettes. In practice, this means that the stability is not satisfactory when the speed should be 30 high. The process is thus inadequate resource and time consuming as well as costly.

Fra US-A-3.539.085 er det kendt at styre folier i form af væv igennem eksempelvis en trykpresse, og hvor styresy-35 stemet blandt andet tilgodeser/styrer spændinger i vævet ved hjælp af styring af valsernes hastighed. Metoden løser DK 172268 B1 2 ikke det problem, der er med at placere tryk på emballagedele, hvilke emballagedele jo ikke er fremstillet i ét plan og således er uegnet til den masseproduktion, der er angivet i skriftet.From US-A-3,539,085 it is known to control films in the form of tissue through, for example, a printing press, and where the control system, among other things, satisfies / controls tension in the tissue by controlling the speed of the rollers. The method does not solve the problem of placing pressure on packaging parts, which packaging parts are not manufactured in one plane and thus unsuitable for the mass production stated in the specification.

55

Fra WO 91/15342 kendes et apparatur og en måde til placering af irregulært afgrænsede billeder på et folie. Skriftet løser ikke det problem, der er ved en entydig styring af de enkeltdele, der ønskes forsynet med et print, 10 og tillader, således ikke en masseproduktion i forbindelse med emballagedelene.From WO 91/15342 an apparatus and method for placing irregularly delimited images on a film are known. The writing does not solve the problem of unambiguous control of the individual parts desired to be provided with a print, 10 and thus does not allow mass production in connection with the packaging parts.

Det er formålet med opfindelsen at tilvejebringe en fremgangsmåde, der ikke har den kendte tekniks ulemper, og hvor 15 det således ikke er nødvendigt at udstanse emballagen forud for trykningen, og hvor der opnås en rationel håndtering af emballagedelene med et minimum af arbejdsgange. Blandt andet reduceres antallet af stakningsarbejdsgange, idet måden muliggør en trykning af foliebaner med emballagedele ved 20 fødning direkte fra maskinen, der producerer emballagedelene.It is an object of the invention to provide a method which does not have the drawbacks of the prior art, whereby it is not necessary to punch the packaging prior to printing, and where a rational handling of the packaging parts is achieved with a minimum of working procedures. Among other things, the number of stacking operations is reduced, as the method enables printing of film webs with packaging parts at 20 feeding directly from the machine producing the packaging parts.

Dette formål opnås ved en fremgangsmåde af den i indledningen angivne, og hvor emballagedelene udgør en del af en 25 sammenhængende foliebane, idet de enkelte emballagedele ligger i afstand til hinanden og via foliebanen er i forbindelse med hinanden, hvor den sammenhængende foliebane med emballagedelene føres frem til en trykkesektion, hvor trykningen af emballagedelene i trykkesektionen foretages 30 med tryksko og pr. afsat tryk omfatter en emballagedel eller flere parallelt liggende og ved siden af hinanden med afstand liggende emballagedele, og hvor emballagedelene dernæst føres frem til en adskillelsessektion, hvor den enkelte emballagedel ved en adskillelsesproces skilles fra 35 foliebanen.This object is achieved by a method of the introduction stated in the introduction, in which the packaging parts form part of a continuous film web, the individual packaging parts being spaced apart and via the film web communicating with each other, where the continuous film web with the packaging parts is advanced. for a printing section where the printing of the packaging parts in the printing section is carried out 30 with printing shoes and per. The deposited pressure comprises a packaging part or several parallel and spaced apart packaging parts, and the packaging parts are then advanced to a separation section where the individual packaging part is separated from the foil web by a separation process.

DK 172268 B1 3DK 172268 B1 3

Foliebanen med de formede emballagedele transporteres direkte frem til trykkesektionen, hvorved det undgås at skulle stable og efterfølgende placere emballagedelene i kassetterne, der så ville transportere disse frem til tryk-5 kesektionen, sådan som det er almindelig kendt. Trykning ifølge opfindelsen foregår nede i emballagedele, der hensigtsmæssigt kan ligge på samme linje set i tværgående retning. Herefter positioneres folien i forhold til den næste række tryksko, således at den næste tværgående række embal-10 lagedele placeres ud for den næste række tryksko. De trykte emballagedele fjernes fra foliebanen ved en adskillelsesproces på det tidspunkt, hvor foliebanedelen med de trykte data ikke er i bevægelse, og emballagedelen kan nu stables eller håndteres på anden vis, idet den nu er parat til 15 brug.The film web with the shaped packaging parts is transported directly to the printing section, thereby avoiding having to stack and subsequently placing the packaging parts in the cassettes which would then transport them to the printing section, as is well known in the art. Printing according to the invention takes place in packaging parts which may conveniently lie on the same line seen in a transverse direction. Then, the foil is positioned relative to the next row of printing shoes, so that the next transverse row of packaging layers is placed next to the next row of printing shoes. The printed packaging parts are removed from the foil web by a separation process at the time when the foil web portion with the printed data is not moving and the packaging portion can now be stacked or otherwise handled, being now ready for use.

Processen er således karakteriseret ved at være en kontinuerlig proces, hvor behovet for manuel betjening er minimal.Thus, the process is characterized by being a continuous process where the need for manual operation is minimal.

20 Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 2 opnås en hensigtsmæssig og entydig placering af emballagen i relation til den videre håndteringsproces og det benyttede værktøj, samtidig med, at en stor trykt emballageproduktion er mulig.By using the method according to the invention as claimed in claim 2, an appropriate and unambiguous positioning of the packaging is achieved in relation to the further handling process and the tool used, while at the same time a large printed packaging production is possible.

2525

Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 3 og 4 opnås ved frem- og tilbagegående bevægelser af folien, at denne stadig er korrekt centreret i forhold til trykskoenes placering.By using the method according to the invention as claimed in claims 3 and 4, by reciprocating movements of the foil, it is achieved that it is still properly centered relative to the location of the printing shoes.

3030

Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 5 opnås en hensigtsmæssig udformning af fastholdelsesorganerne samtidig med, at en drivmekanisme for frem- og tilbageføring af foliebanen er tilvejebragt. Fje-35 derbelastningen sikrer et korrekt tryk på folien, så denne følger hastigheden på de nedre hjulsæts periferi.By using the method according to the invention as set out in claim 5, an appropriate design of the retaining means is obtained while providing a drive mechanism for the return and return of the foil web. The spring load ensures a correct pressure on the foil so that it follows the speed of the lower wheel set periphery.

DK 172268 B1 4DK 172268 B1 4

Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 6 opnås en hensigtsmæssig udformning af trykkesektionen og muliggør en stor produktion af de trykte emballagedele pr. tidsenhed.By using the method according to the invention as set out in claim 6, an appropriate design of the printing section is obtained and enables a large production of the printed packaging parts per unit. unit of time.

55

Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 7 opnås en effektiv tidsbesparende trykning af emballagedele, når de som angivet er formet i formstof og omfatter lågdelene.By using the method according to the invention as claimed in claim 7, effective time-saving printing of packaging parts is obtained when, as stated, they are formed in plastic material and comprise the lid parts.

1010

Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 8 opnås, at emballagedelene kan formes tæt ved siden af hinanden i foliebanen, idet den positionerende bevægelse sikrer, at der er plads til den efterfølgende 15 trykskosektion i den efterfølgende emballagedels sektion.By using the method according to the invention as claimed in claim 8, it is achieved that the packaging parts can be formed close to each other in the foil web, the positioning movement ensuring that there is space for the subsequent printing shoe section in the section of the subsequent packaging part.

Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 9 opnås, at det er muligt ved hjælp af de optiske sensorer at registrere for- og bagkant af de enkelte 20 emballagedele og således positionere emballagedelene korrekt i forhold til trykskoene. CNC-styresystemet sikrer, at trykskoenes hastighed styres samtidig med, at CNC-styresystemet regulerer motorerne til fremdrivning af foliebanen som funktion af trykskoenes hastighed.By using the method according to the invention as claimed in claim 9, it is achieved that it is possible by means of the optical sensors to detect the front and rear edges of the individual packaging parts and thus position the packaging parts correctly in relation to the printing shoes. The CNC control system ensures that the speed of the compression shoe is controlled at the same time that the CNC control system regulates the motors for propulsion of the foil web as a function of the speed of the compression shoe.

2525

Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 10 opnås en effektiv og prisbillig adskillelsesproces .By using the method according to the invention as claimed in claim 10, an efficient and affordable separation process is achieved.

30 Ved at benytte fremgangsmåden ifølge opfindelsen som angivet i krav 11 opnås, at trykningen er tør, inden selve adskillelsesprocessen finder sted, hvorfor det sikres, at trykningen ikke bliver ødelagt.By using the method according to the invention as set forth in claim 11, it is obtained that the printing is dry before the actual separation process takes place, thus ensuring that the printing is not destroyed.

35 Opfindelsen forklares herefter nærmere under henvisning til tegningen, idet DK 172268 B1 5 fig. 1 viser sidebillede af processen i oversigtsform, fig. 2 viser trykkeprocessen, 5 fig. 3 viser trykkevalsen med tryksko, fig. 4 viser et udsnit af en foliebane med emballagedele set fra oven, 10 fig. 5 viser en typisk emballagedel med tryk i lågspej let.The invention will now be explained in more detail with reference to the drawing, in which FIG. 1 is a side view of the process in summary form; FIG. 2 shows the printing process; FIG. 3 shows the printing roller with pressure shoes; FIG. 4 is a top view of a film web with packaging parts; FIG. 5 shows a typical packaging part with pressure in a lid mirror.

fig. 6 viser et udsnit af en foliebane med emballagedele samt trykvalsen set fra oven.FIG. 6 shows a section of a foil web with packaging parts as well as the pressure roller seen from above.

1515

De forskellige trin, der indgår ved fremstilling af en trykt emballagedel, fremgår af fig. 1, der viser sektion A omfattende formning af låg ud fra en folierulle 17 ved en termoplastisk formning. Fødningen kan også foregå direkte 20 fra en extruder. Typiske materialer er polypropylen PP, polystyren PS, polyethylen PE og polyvinylklorid PVC, som i opvarmet tilstand, eksempelvis ved en vakuum- eller trykformning, formes til det ønskede produkt. Herefter ledes foliebanen med de tildannede emballagedele til selve tryk-25 kesektionen benævnt B, og for at undgå, at håndteringen af folien fra den ene sektion forplanter sig til den anden sektion, hænger folien 1 med emballagedele 2 hensigtsmæssigt ned i en bue.The various steps involved in preparing a printed packaging part are shown in FIG. 1, showing section A comprising forming lids from a foil roll 17 by a thermoplastic molding. The feeding can also take place directly from an extruder. Typical materials are polypropylene PP, polystyrene PS, polyethylene PE, and polyvinyl chloride PVC, which in a heated state, for example, by vacuum or pressure forming, is formed into the desired product. Thereafter, the film web with the formed packaging parts is guided to the printing section itself called B, and to prevent the handling of the film from one section propagating to the other section, the film 1 with packaging parts 2 is conveniently suspended in an arc.

30 I forbindelse med trykning af emballagen er et halvmanuelt procestrin M for justering og kontrol af farverne inkorporeret. Efter trykning transporteres folie og emballagedele videre til tørresektion C og derefter videre til adskillelsessektion D, hvor udstansning af emballagedelene 35 finder sted. Herefter sker en manuel eller automatisk håndtering M' af emballagedelene, eksempelvis i form af DK 172268 B1 6 stabling, pakning, m.m.30 In connection with printing the packaging, a semi-manual process step M for adjusting and checking the colors is incorporated. After printing, foil and packaging parts are transported to drying section C and then on to separating section D where punching of the packaging parts 35 takes place. Thereafter, manual or automatic handling M 'of the packaging parts takes place, for example in the form of DK 172268 B1 6 stacking, packing, etc.

Visse folier - fortrinsvis PP - bør inden trykning udsættes for en tritning T, hvorved overfladespændingen af folien 5 justeres. Tritningen kan udføres enten som gas- eller el-tritning.Certain foils - preferably PP - should be subjected to a step T prior to printing, thereby adjusting the surface tension of the foil 5. The trimming can be performed either as gas or electric trimming.

Trykkesektionen vil blive beskrevet nærmere under henvisning til fig. 2, der viser en foliebane 1 med emballagedele 10 2, som i dette tilfælde er emballagelåg, der omfatter et lågspejl 3, som udgør den centrale flade, hvorpå trykket skal afsættes, samt en omgivende kant 4.The printing section will be described in more detail with reference to FIG. 2, showing a film web 1 with packaging parts 10 2, which in this case are packaging lids comprising a lid mirror 3, which constitutes the central surface on which the pressure is to be deposited, and a surrounding edge 4.

Foliebanen føres frem ved hjælp af fastholdelsesorganer 5, 15 der dannes af to øvre hjulsæt 6 og to nedre hjulsæt 7 omfattende i alt otte hjul. Det øvre hjulsæt 6 er fjederbelastet og trykker mod foliens overside ud for det sted, hvor det nedre hjulsæt 7 ligger an mod foliebanens 1 underside. Hjulsættene er beliggende mellem de enkelte lågbaner 20 eller i hver side uden for de yderste lågbaner. De nedre hjulsæt 7 er sammenlåst mekanisk og drives af en højdynamisk motor, der således regulerer fremføringshastighed og tilbagegående bevægelse for foliebanen samtidig med, at foliebanen fastholdes.The foil web is advanced by means of retaining means 5, 15 formed by two upper wheelsets 6 and two lower wheelsets 7 comprising a total of eight wheels. The upper reel set 6 is spring loaded and presses against the top side of the foil next to the place where the lower reel set 7 abuts the bottom side of the foil web 1. The wheel sets are located between the individual cover lanes 20 or on each side outside the outer cover lanes. The lower wheelset 7 is mechanically interlocked and driven by a high dynamic motor, thus regulating the feed rate and reciprocating motion of the film web while retaining the film web.

2525

Antallet af hjulsæt kan dog variere fra et hjulsæt op til adskillige afhængigt af blandt andet antal rækker, foliens vægt og fremføringshastigheden 30 Alt efter udformning af lågdelene er der på over- eller underside af foliebanen 1 anbragt styreskinner 15, der enten griber op mellem 2 rækker af emballagedele eller i hver side uden for de yderste rækker af emballagedele og sikrer sideværtsstabiliteten af foliebanen.However, the number of reel sets can vary from one reel set up to several depending, among other things, on the number of rows, the weight of the foil and the feed rate 30 Depending on the design of the lid parts, guide rails 15 are arranged on the upper or lower side of the foil web 1, either gripping between 2 rows. of packaging parts or in each side outside the outer rows of packaging parts and ensures the lateral stability of the film web.

3535

Er der behov derfor, kan der desuden monteres lange styre- DK 172268 B1 7 skinner. Skinnerne kan anbringes mellem hjulsættene 6 eller på ydersiden i forhold til disse.If needed, long guide rails can also be installed. The rails can be placed between the wheel sets 6 or on the outside relative thereto.

Selve trykkeudstyret omfatter en trykkevalse 8 og en mod-5 holdsvalse 9. På trykkevalsen 8 er der monteret tryksko 10, fortrinsvis er fire tryksko placeret på samme omkreds af tromlens periferi og forskudt 90° fra hinanden. Antallet kan dog variere fra en enkelt til adskillige afhængigt af blandt andet den foliedel, der skal trykkes. Der frem-10 stilles gerne flere ved siden af hinanden liggende rækker af tryksko, fortrinsvis fire. Trykskoene er hensigtsmæssigt placeret således, at de danner rækker liggende parallelt med valsens midterakse.The printing equipment itself comprises a printing roller 8 and a holding roller 9. On the printing roller 8, pressure shoes 10 are mounted, preferably four printing shoes are located on the same circumference of the periphery of the drum and displaced 90 ° apart. However, the number may vary from one to several depending, among other things, on the foil part to be printed. It is preferable to produce several adjacent rows of printing shoes, preferably four. The pressure shoes are suitably positioned so as to form rows lying parallel to the center axis of the roller.

15 Selve trykskoens overflade 11, som skal afsætte trykket, og som påføres sværten fra såkaldte klichévalser, er svagt buet i fladen. Trykningen er den såkaldte tøroffsettryk-ning. Ved hjælp af et CNC-styresystem 15 sørges der for, at lågspejlets 3 hastighed ved påtrykning af offsettrykket 20 svarer til trykskoens 10 periferihastighed, idet trykskoen 10 kører som master, og motoren, der regulerer foliens fremføringshastighed, kører som såkaldt slave i forhold til denne. Motor for foliebane og motor for tryksko samt farve-værker styres hensigtsmæssigt via en flerakset servomotor-25 styring i lighed med dem, som anvendes på CNC-værktøjs-maskiner, robotter m.v. Hermed er det muligt at handle foliebanen med frem og tilbagegående bevægelser, tilpasse hastighed, position m.v., således at dette synkroniseres elektrisk sammen med trykskoens aktuelle position og 30 hastighed.The surface 11 of the printing shoe itself, which is supposed to dispense the pressure and which is applied to the ink from so-called cliché rollers, is slightly curved in the surface. Printing is the so-called dry offset printing. By means of a CNC control system 15, the speed of the lid mirror 3, when applying the offset pressure 20, corresponds to the circumferential speed of the printing shoe 10, the printing shoe 10 running as a master and the motor controlling the feed rate of the foil running as so-called slave. . Conveniently for foil web and printing shoe motor as well as color works, it is conveniently controlled via a multi-axis servo motor control similar to those used on CNC machine tools, robots, etc. This makes it possible to trade the foil web with reciprocating movements, adjusting speed, position etc., so that this is electrically synchronized with the current position and speed of the printing shoe.

For at sikre en vis påtrykningskraft er der under folien placeret en valse 9 udstyret med modholdssko 12, fortrinsvis to forskudt 180° i forhold til hinanden på samme peri-35 feriomkreds. Antallet af rækker, der følger omkredsen af valsen 9, modsvarer antallet af rækker af tryksko, hvorfor DK 172268 B1 8 antallet af modholdssko udgør otte, når antallet af tryksko udgør seksten styk. Hastigheden af modholdsskoene tilpasses hastigheden af trykskoene således, at modholdsskoene 12 danner modhold ved påtrykning af offsettrykket på embal-5 lagen og ligger lige ud for trykskoen 10, når denne afsæt ter sit tryk, og har samme periferihastighed som denne. Takttiden kan være ned til cirka 500 millisek., hvilket svarer til 120 takter pr. minut. Anvendes der 4 tryksko i en tværgående række, vil der således kunne trykkes op til 10 cirka 28.800 låg pr. time.To ensure some compressive force, a roller 9 is provided beneath the foil equipped with restraining shoes 12, preferably two displaced 180 ° relative to each other on the same peripheral circumference. The number of rows following the circumference of the roller 9 corresponds to the number of rows of pressure shoes, which is why DK 172268 B1 8 the number of restraining shoes constitutes eight when the number of pressure shoes constitutes sixteen pieces. The velocity of the restraining shoes is adjusted to the velocity of the pressure shoes so that the restraining shoes 12 resist the pressure of the offset pressure on the package 5 and lie just outside the pressure shoe 10 when this pressurizes and has the same peripheral speed as this. The clock time can be down to about 500 milliseconds, which corresponds to 120 beats per minute. minute. If 4 pressure shoes are used in a transverse row, up to 10 approximately 28,800 lids per capita will be printed. hour.

Når en tværgående række låg 14 er trykt, køres foliebanen lidt tilbage, idet den næste række emballagedele ligger så tæt på de trykte emballagedele, at der ikke ville være 15 plads for trykskoen til at afsætte sit tryk korrekt i den nye række af lågspejl. Sensorer 16, fortrinsvis optiske sensorer, eksempelvis lysdioder eller lasere, registrerer emballagens for- og/eller bagkanter, således at den næste række positioneres korrekt i forhold til trykskoen 10, og 20 trykning kan nu foregå, idet foliens og trykskoens ind byrdes hastighed tilpasses hinanden som tidligere beskrevet .When a transverse row of lids 14 is printed, the foil web is pushed back slightly, the next row of packaging parts being so close to the printed packaging parts that there would be no space for the printing shoe to properly apply its pressure in the new row of lid mirrors. Sensors 16, preferably optical sensors, such as LEDs or lasers, detect the front and / or back edges of the packaging so that the next row is positioned correctly relative to the printing shoe 10, and 20 printing can now take place as the velocity of the foil and the printing shoe aligns with each other. as previously described .

Fig. 4 viser foliebanen set fra oven og med rektangulært 25 formede låg. Foliebanen kunne naturligvis også omfatte andre former for emballagedele, såsom runde, trekantede, ovale, m.m., ligesom emballagedelene også kunne være andet end låg, eksempelvis bakker, bøtter, m.m.FIG. 4 is a plan view of the foil web with rectangular 25 shaped lids. The foil web could of course also include other forms of packaging parts, such as round, triangular, oval, etc., just as the packaging parts could also be other than lids, for example trays, buckets, etc.

30 Emballagedelene ligger relativt tæt og i det konkrete tilfælde med en afstand på omkring 10 mm. Afstanden vil naturligvis afhænge af emballagedelens form. De øvre hjulsæt 6 ses gribe ned på folien mellem rækkerne eller i hver side uden for de yderste lågbaner og med et par placeret på hver 35 sin side af trykkesektionen. Emballagedelene er formet i folien, så de danner langsgående, parallelle rækker 13 af i DK 172268 B1 9 sideværts retning ligeledes parallelle rækker 14.30 The packaging parts are relatively dense and in the specific case with a distance of about 10 mm. The distance will, of course, depend on the shape of the packaging part. The upper reel sets 6 are seen to grip the foil between the rows or in each side outside the outer cover lanes and with a pair located on each side of the printing section. The packaging parts are formed in the foil so that they form longitudinal, parallel rows 13 of parallel rows 14 in the lateral direction in DK 172268 B1 9.

Efter at folien er blevet trykt, vil denne, som det fremgår af fig. 1, bevæge sig videre frem til en tørresektion be-5 nævnt C således, at det sikres, at det afsatte tryk forbliver permanent på låget. Ved at lade folien hænge i en bue efter tørresektionen opnås, at stanseprocessen i adskillelsessektionen D, der følger efter tørringen, kan foregå kontinuerligt og uden hensyn til de frem- og tilbageførin-10 ger, der finder sted i trykkesektionen for at tilgodese positioneringen af emballagedelene 2 i forhold til trykskoene 10 som tidligere beskrevet, idet den hængende folie sikrer, at træk i folien hidrørende fra håndteringen i den ene sektion ikke forplanter sig til den anden og griber 15 forstyrrende ind.After the foil has been printed, as shown in FIG. 1, move on to a drying section named C such that it ensures that the deposited pressure remains permanently on the lid. By allowing the foil to hang in a bow after the drying section, it is achieved that the punching process in the separation section D following the drying can be carried out continuously and without regard to the feed-back which takes place in the printing section to accommodate the positioning of the packaging parts. 2 relative to the printing shoes 10 as previously described, the hanging foil ensuring that features of the foil resulting from handling in one section do not propagate to the other and interfering 15.

Banen styres i stansesektionen efter samme princip som ved trykkemaskinen således, at man ved omstilling til anden lågformat også her kan spare indstillingstid, idet der hen-20 sigtsmæssigt anvendes en 2 akse motorstyring, hvor diverse beregninger kan foretages. Frasortering af dårlige låg kan ske ved at springe udstansningen over og i stedet føre hele banen videre til granulator eller opruller. Dårlige låg kan for eksempel være låg, hvor folien, formningen eller tryk-25 ning ikke er i orden. Til kontrol af emnerne kan der monteres optisk udstyr, som sammenligner billedet af foliebanen med et andet i forvejen indlæst billede og derved registrere uensartetheder.The web is controlled in the punch section according to the same principle as with the printing machine, so that when switching to a different lid format you can also save setting time here, preferably using a 2 axis motor control where various calculations can be made. Bad lids can be removed by skipping the punch and instead moving the entire path to the granulator or reel. For example, bad lids can be lids where the foil, molding or printing is not in order. Optical equipment can be mounted to control the subjects, which compares the image of the film web with another pre-loaded image, thereby detecting disparities.

30 Efter udstansningen sker der en manuel eller automatisk pakning af emballagedelene. Denne proces kan ud over pakning også omfatte kontrol af emballagedelene.30 After punching, the packaging parts are manually or automatically packaged. In addition to packaging, this process may also include checking the packaging parts.

Selve den udformede emballagedel kan som det fremgår af 35 fig. 5 være et rektangulært formet låg og omfattende et lågspejl 3 og en kant 4, som på undersiden griber fat i el- DK 172268 B1 10 ler om den beholder, låget påmonteres.As shown in FIG. 5 is a rectangular shaped lid and comprises a lid mirror 3 and an edge 4, which grips the underside of the container on the underside of the container.

Fig. 6 viser trykvalse 8 og foliebane med emballagedele 2 set fra oven, og hvor de utrykte låg tilføres fra den ene 5 side, påtrykkes det ønskede tryk og fortsætter videre mod tørre- og adskillelsessektionen for videre behandling.FIG. 6 shows pressure roll 8 and foil web with packaging parts 2 seen from above, and where the unprinted lids are supplied from one 5 side, the desired pressure is applied and continues on to the drying and separation section for further processing.

Selve tøroffsettrykket placeres således i lågspejlet, og den ifølge opfindelsen anførte metode sikrer, at trykket sidder korrekt centreret.Thus, the dry offset pressure is placed in the lid mirror and the method according to the invention ensures that the pressure is properly centered.

10 15 20 25 30 3510 15 20 25 30 35

Claims

A method of printing packaging parts (2), comprising at least two vertically different surface levels (3, 4), characterized in that - the packaging parts (2) form part of a continuous film web (1) ), the individual packaging parts (2) being spaced apart and communicating with each other via the film web, - the continuous film web with the packaging parts being advanced to a printing section B, - 15 - printing of the packaging parts (2) in the pressure section is made with pressure shoes (10) and per. deposited pressure comprises one packing portion or several parallel and spaced apart packing portions, and the printed packing portions are then advanced to a separating section D where the individual packing portion is separated from the film web by a separation process.

A method according to claim 1, characterized in that the packaging parts (2) form longitudinal, preferably parallel rows (13), which comprise at least one and preferably four rows, and that the rows also in the lateral direction also preferably form parallel rows (14). 30

Method according to any one of the preceding claims, characterized in that the continuous foil web with packaging parts (2) is secured to it in a lateral direction by means of guiding means (15) in a lateral direction via a feeder support. DK 172268 B1 12

Method according to any one of the preceding claims, characterized in that the continuous film web with packaging parts in reciprocating movements is maintained and guided in a longitudinal direction by means of 5 retaining means (5).

Method according to claim 4, characterized in that the retaining means (5) comprise wheelsets, which wheelsets preferably comprise four pairs of wheels and that the wheels in each pair are located on each side of the film web (1) and abut with this forming an upper (6) and a lower wheel set (7) positioned opposite each other, which upper wheel set (6) is spring loaded and which lower wheel set (7) is motor driven. 15

Method according to any one of the preceding claims, characterized in that the pressure section B comprises at least one pressure shoe (10), preferably four per head. a longitudinal row of packaging parts, and a restraining shoe (12), preferably two, which (s) of pressure shoes and retained shoes are mounted on each rotatable drum (8, 9), and wherein a pressure shoe (10) and a restraining shoe (12) lie to each other during printing.

Method according to any one of the preceding claims, characterized in that the packaging parts (2) are lids for packaging and preferably manufactured in plastic material and comprise a lid mirror (3) and a level offset (4) relative to the lid mirror (3).

Method according to any one of the preceding claims, characterized in that the packaging parts move during printing and at a speed corresponding to the circumferential speed of the printing shoe and that the film web, after printing a number of packaging parts, stops its movement, whereupon the film web is preferably moved. back and positioned relative to the subsequent pressure shoe (s) DK 172268 B1 13, and then, when printing the subsequent packaging row, transversely moved at a speed corresponding to the circumferential speed of the pressure shoe.

Method according to any one of the preceding claims, characterized in that the printing and guiding up to the pressure section B are controlled and regulated relative to each other by a control system and a positioning system, which control system preferably comprises CNC control technique 10 (15) and which positioning system preferably comprises sensors (16).

Method according to any one of the preceding claims, characterized in that the separation section D comprises a punching machine, which punches the packaging parts from the foil.

Process according to any one of the preceding claims, characterized in that the process also comprises a drying process C, which drying process takes place after printing B and before the separating section D.