DK171785B1

DK171785B1 - Method of manufacturing a rotary punching machine and part of such a machine

Info

Publication number: DK171785B1
Application number: DK012696A
Authority: DK
Inventors: Per-Olof Roenngard
Original assignee: Staallinjestans Laserform Ab
Priority date: 1993-08-18
Filing date: 1996-02-08
Publication date: 1997-05-26
Also published as: SE9302667L; SE503327C2; SE9302667D0; NO960555L; AU7511094A; CA2169658A1; NO960555D0; DK12696A; DE4496063T1; WO1995005264A1

Description

i DK 171785 B1in DK 171785 B1

FREMGANGSMÅDE TIL FREMSTILLING AF EN ROTATIONSSTANSEMASKINE OG DEL AF EN SÅDAN MASKINEPROCEDURE FOR MANUFACTURING A ROTARY CUTTING MACHINE AND PART OF SUCH A MACHINE

Nærværende opfindelse vedrører en fremgangsmåde til frem-5 stilling af en rotationsstansemaskine samt en del til en sådan maskine.The present invention relates to a method of manufacturing a rotary punching machine as well as a part to such a machine.

Opfindelsens baggrund 10 I en tidligere kendt fremgangsmåde til fremstilling af en rotationsstansemaskine beregnet til udstansning af for eksempel emballageemner limes en reduceret tegning over emballagekonstruktionen på en trætromle. Tegningens konturer følges og saves med håndkraft. Denne fremgangsmåde er imid-15 lertid utidssvarende i mange henseender, og den er heller ikke nøjagtig eller pålidelig. For eksempel forhindrer de forborede huller, som er nødvendige til indsættelse af savbladet, at de inddrevne stanselinealer får rigtigt fæste.BACKGROUND OF THE INVENTION In a prior art method of producing a rotary punch machine intended for stamping, for example, packaging blanks, a reduced drawing of the packaging structure is glued onto a wooden drum. The contours of the drawing are followed and sawed by hand. However, this approach is outdated in many respects, nor is it accurate or reliable. For example, the pre-drilled holes needed to insert the saw blade prevent the recessed punch lines from getting properly attached.

20 I de senere år har man i stedet anvendt laser til skæring af rillemønstret i trætromlen, idet sådanne riller tilvejebringer et betydeligt bedre greb for stanselinealen.20 In recent years, laser has been used instead to cut the groove pattern in the wooden drum, such grooves providing a significantly better grip for the punching ruler.

Alle kartonstansemaskiner, både plane såvel som rotations-25 stansemaskiner, fremstilles med et brosystem, idet broernes størrelse og placering på tromlen bestemmes, når stansemaskinerne konstrueres. Dette gøres for at eliminere "puslespil-effekten", det vil sige for at få alle tromlens stykker til at hænge sammen. Broernes længde er 8-10 mm.All cardboard punching machines, both planar as well as rotary punching machines, are manufactured with a bridge system, the size and location of the bridges on the drum being determined as the punching machines are constructed. This is done to eliminate the "puzzle effect", that is, to make all the pieces of the drum stick together. The length of the bridges is 8-10 mm.

3030

Opfindelsens problemThe problem of the invention

Trætromlen består sædvanligvis af to halvcylindriske dele.The wooden drum usually consists of two semi-cylindrical parts.

Det har imidlertid vist sig, at ikke engang de med laser-35 stråler udskårne riller, som grænser op til samlingen mellem disse to dele, på pålidelig måde er i stand til at DK 171785 B1 2 fastholde stanselinealerne, der forløber i tromlens rundtgående retning, sandsynligvis fordi spændingerne i tromlen frit kan påvirke de kanter på tromlens dele, der afgrænser samlingen. Stanselinealerne har således udvist en 5 tendens til at rette sig ud ved enden af krumningen på den rille, der grænser op til disse kanter.However, it has been found that not even the laser-cut grooves adjacent to the joint between these two parts are reliably able to hold the punch lines extending in the circumferential direction of the drum, probably because the stresses in the drum can freely affect the edges of the parts of the drum that define the assembly. Thus, the punch lines have a tendency to straighten at the end of the curvature of the groove adjacent to these edges.

Opfindelsens formål 10 Formålet med opfindelsen er løse det ovennævnte problem.Objects of the Invention The object of the invention is to solve the above problem.

Resumé af opfindelsenSummary of the Invention

Dette problem løses i henhold til opfindelsen ved hjælp af 15 det i krav 1 og krav 3 angivne. Herved opnås nemlig, at de kædebroer, som er definerede i de vedføjede krav og den efterfølgende beskrivelse, erstatter de tidligere kendte perifere rilledele, som grænser op til samlingen mellem de to tromlehalvdele.This problem is solved according to the invention by means of the one of claims 1 and 3. In this way, it is achieved that the chain bridges defined in the appended claims and the following description replace the previously known peripheral groove parts which adjoin the joint between the two drum halves.

2020

Beskrivelse af en udførelsesform for opfindelsenDescription of one embodiment of the invention

En udførelsesform for opfindelsen vises i de medfølgende tegninger, hvori 25 fig. 1 er en plan illustration af de to tromlehalvdele, fig. 2 er et delbillede set i perspektiv af en tromlehalvdel, som delvist har stanselinealer, og 30 fig. 2A og 2B er forstørrede illustrationer af delene, som er indrammet med stiplede linier i fig. 2.An embodiment of the invention is shown in the accompanying drawings, in which FIG. 1 is a plan view of the two drum halves; FIG. 2 is a perspective view of a drum half having partial punch lines, and FIG. 2A and 2B are enlarged illustrations of the portions framed in broken lines in FIG. 2nd

Fig. 1 viser en trætromle bestående af to tromlehalvdele 1.FIG. 1 shows a wooden drum consisting of two drum halves 1.

35 Samlingen mellem de to tromlehalvdele er betegnet med 2. Tromlehalvdelene 1 har et med laserstråle udskåret rille- DK 171785 B1 3 mønster 3 til udstansning og mærkning af to emner til bakker af bølgepap, som er limet i alle fire hjørner. Rillemønstret 3 er fremstillet på konventionel måde, således at 8 mm lange broer står tilbage mellem udskæringerne eller 5 slidserne 5. Stansestållinealer med fordybninger til afgrænsning af broerne 4 indsættes i rillerne, der består af broerne 4 og udskæringerne 5.35 The joint between the two drum halves is denoted by 2. The drum halves 1 have a laser beam cut groove pattern 3 for punching and marking two corrugated cardboard trays glued in all four corners. The groove pattern 3 is made in a conventional manner so that 8 mm long bridges remain between the cutouts or the slots 5. Punching steel lines with grooves for defining the bridges 4 are inserted into the grooves consisting of the bridges 4 and the cuts 5.

Ifølge opfindelsen er de dele af de perifere riller 6, som 10 er beliggende ved siden af de kanter af tromlehalvdelen, der afgrænser samlingen 2, brudte, det vil sige, de består af en kædebro 8 af 4 mm lange broer 9 vekslende med 4 mm lange udskæringer 10 eller slidser, idet en sådan bro 9 definerer tromlehalvdelenes kant.According to the invention, the portions of the peripheral grooves 6, which are 10 adjacent to the edges of the drum half defining the assembly 2, are broken, that is, they consist of a chain bridge 8 of 4 mm long bridges 9 alternating with 4 mm long cuts 10 or slits, such a bridge 9 defining the edge of the drum halves.

1515

Ved den øverste del af fig. 2A er en i en bue bøjet stanselineal 11 helt inddrevet i en perifer rille 6, og i bunden af fig. 2A er en sådan stanselineal 12 kun delvist inddrevet i en perifer rille 6. Det vil tydeligt ses i figuren, 20 at stanselinealerne 11, 12 er forsænket med regelmæssige 4 mm's mellemrum i længderetningen, således at de passer ind i kædebroerne 8. Kædebroerne 8 har en længde på ca. 70-80 mm, men de kan være af en hvilken som helst længde efter valg, afhængig af emballagens udformning og dens pla-25 cering på stansen.At the upper part of FIG. 2A is a curved punching ruler 11 completely bent in a circumferential groove 6, and at the bottom of FIG. 2A, such punching ruler 12 is only partially retracted into a circumferential groove 6. It will be clearly seen in FIG. 20 that the punching rulers 11, 12 are recessed at regular intervals of 4 mm longitudinally to fit into the chain bridges 8. The chain bridges 8 have a length of approx. 70-80 mm, but they can be any length of choice depending on the design of the packaging and its placement on the punch.

Claims

A method of producing a rotary punching machine with a wooden drum consisting of two semi-cylindrical 5 drum halves, in which on the drum halves (1), the desired pattern (3) is formed by laser beam cutting and punching rulers (11, 12) are inserted into the the cut-out grooves (6), characterized in that the grooves (6), which are to be cut in the circumferential direction of the wooden drum, are formed adjacent the longitudinal edges of the drum half at intervals such that a chain bridge (8) with wooden bridges (9) is formed. of a length of approx. 4 mm alternating with cut-outs (10) of a length of approx. 4 mm, said edge of the drum being formed by such a bridge (9) and the chain bridge (8) 15 being similar to the tooth on a punching ruler.

Method according to claim 1, characterized in that the chain bridges have a length of 70-80 mm. 20

3. A wooden drum half, which is intended to form part of a wooden drum for a rotary punching machine, characterized in that the cutting pattern (3) of the drum half (1) is produced by cutting with laser beams and that they are cut by laser beams 25 grooves (6) extending in the circumferential direction of the drum half adjacent the edges of the drum half are formed by chain bridges (8) with wooden bridges (9) of about length.

4 mm alternating with cut-outs (10) of a length of approx. 4 mm.