DK161129B

DK161129B - CLOSE MAIN

Info

Publication number: DK161129B
Application number: DK227286A
Authority: DK
Inventors: Christian Looser
Original assignee: Alcan Rorschach Ag
Priority date: 1985-05-17
Filing date: 1986-05-16
Publication date: 1991-06-03
Also published as: DK161129C; AU582650B2; DK227286A; DK227286D0; ATE36686T1; CH668048A5; EP0203032B1; AU5735286A; DE3660582D1; EP0203032A1; JPS61273309A

Abstract

1. A sealing head (1) for sealing a covering film (8) to the rim (6) of a vessel, in particular to the rim (6) of a glass vessel (5), consisting of a deformable heatable metal disc (9) provided with slots (27) extending substantially radially towards the centre, characterised in that the slots (27) divide up the metal disc (9) into a plurality of narrow lamellae (25) connected to the metal disc (27) along the perimeter and in that the lamellae (25) are connected with the metal disc (9) at the peripheral point of attachment by means of a narrow bridge (31) formed through a reduction in cross-section.

Description

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Opfindelsen angår et lukkehoved af den i krav l's indledning angivne art.The invention relates to a closure head of the kind specified in the preamble of claim 1.

Ved glasbeholdere kan planheden af lukkeranden nedsættes 5 ved uregelmæssig afkøling under fremstillingen, således at der kan opstå tæthedsproblemer ved lukningen af dækslet eller låget, når lukkehovedet ikke tager højde for disse ujævnheder. De som låg anvendte tynde folier, der for det meste fremstilles af belagt aluminium, formår ikke alene 10 at udligne disse ujævnheder.In glass containers, the flatness of the shutter edge may be reduced by irregular cooling during manufacture, so that leakage problems may occur when closing the cover or lid when the closing head does not take into account these irregularities. The thin foils used as lids, which are mostly made of coated aluminum, are not only able to compensate for these irregularities.

Lukkehoveder til lukning eller forsegling af glasbeholdere med lukkefolier af metal eller kunststof kendes.Sealing heads for closing or sealing glass containers with metal or plastic closure foil are known.

15 I tysk fremlæggelsesskrift nr. 2.915.118 beskrives et lukkehoved, hvis lukkeflade består af en metalskive, som langs omkredsen er forsynet med slidser, der forløber mod centrum. Det slidsforsynede område af skiven er bøjet konisk om forneden på en sådan måde, at den nedadbøjede 20 periferidel af skiven ved sænkning af lukkehovedet mod kanten af beholderen ruller af og presser den mellem skiven og kanten indlagte folie på kanten.15 German Patent Specification No. 2,915,118 discloses a closure head whose closure surface consists of a metal disc, which is provided along the circumference with slots extending towards the center. The slotted area of the disk is bent conically downwards in such a way that the downwardly bending circumference portion of the disk, when lowering the closing head towards the edge of the container, rolls off and presses the film inserted between the disk and the edge on the edge.

Ved rulning kan det ikke undgås, at de dele af skiven, der 25 er i kontakt med folien, glider på folien og kan beskadige denne.In rolling, the parts of the disc which are in contact with the foil cannot be slid onto the foil and can damage it.

Desuden kan de brede lapper ikke følge ujævnhederne i glasbeholderens rand, således at en helt igennem tæt forsegling 30 ikke kan garanteres.Furthermore, the wide patches cannot follow the bumps in the rim of the glass container, so that a fully sealed seal 30 cannot be guaranteed.

Fra FR patentskrift nr. 2.513.965 kendes et lukkehoved med en trykpude bestående af trådsegmenter, der i tilfældig orden er presset til et legeme med en fast form. Den side 35 af legemet, som vender mod lukkefladen er tilpasset dennes overflade. Mellem legemet, som alt efter komprimerings- - 2 -FR patent specification No. 2,513,965 discloses a closure head with a pressure pad consisting of thread segments which are randomly pressed into a solid molded body. The side 35 of the body facing the closure surface is aligned with its surface. Between the body, which depending on the compression

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graden er mere eller mindre elastisk, og lukkeranden er der anbragt et fintmasket metalvæv, som er spændt ud over beholderåbningen og ligger an mod det låg, som skal påsættes.the degree is more or less elastic, and the shutter edge is arranged with a fine-mesh metal tissue, which is stretched beyond the container opening and abuts against the lid to be applied.

55

Det formfaste legeme fremstillet ved sammenpresning af trådsegmenter har ganske vist en høj termisk ledningsevne, men på grund af det tilbagevendende høje fladetryk i det område, hvor legemet er i kontakt med lukkeranden, er lege-10 mets overflade ikke i stand til at foretage et stort antal lukninger eller forseglinger, da kontaktområdet bliver så hårdt, at et upåklageligt anlæg ikke længere kan garanteres .The mold-resistant body made by compressing wire segments has a high thermal conductivity, but due to the recurring high surface pressure in the area where the body is in contact with the shutter edge, the surface of the body is unable to make a large number of closures or seals, as the contact area becomes so hard that an impeccable system can no longer be guaranteed.

15 Formålet med opfindelsen er at anvise et lukkehoved, hvis lameller følger beholderrandens ujævnheder og i alt væsentligt støder mod hele lukkefladen, uden at der dannes huller.The object of the invention is to provide a closure head whose slats follow the unevenness of the container rim and substantially abut the entire closure surface without creating any holes.

20 Dette opnås ifølge opfindelsen derved, at lukkehovedet udformes som angivet i krav 1's kendetegnende del.This is achieved according to the invention in that the closing head is formed as indicated in the characterizing part of claim 1.

Det er nu muligt med retningsbestemt kraft at frembringe et stort og langs hele lukkekanten virkende fladepres ved 25 koncentreret varmetilførsel og dette uafhængigt af planheden for overfladen af lukkekanten. Med et eneste lukkehoved kan der uden videre ved forsegling anbringes låg med forskellig diameterstørrelse indenfor et bestemt område. Lukkehovedet kan ved bortfaldet af ekstra trykelementer 30 udføres meget kompakt og indføres på alle kendte lukkemaskiner .It is now possible with directional force to produce a large and long-acting surface pressure at concentrated heat supply, independently of the flatness of the surface of the closing edge. With a single closure head, seals of different diameter sizes can be easily placed within a certain area by sealing. The closure head can be made very compact in the absence of extra pressure elements 30 and introduced on all known closing machines.

Der beskrives andre fordelagtige udførelsesformer i de afhængige krav.Other advantageous embodiments are described in the dependent claims.

Den med metalkugler, -spåner eller -granulat fyldte udsparing ovenover lamellerne muliggør en nøje tilpasning af 35The recess filled with metal balls, chips or granules above the slats allows for a precise adjustment of 35

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- 3 - trykfladen til kantoverfladen og en udmærket varme-overføring fra varmeelementerne til lamellerne. De i udsparingen løst anbragte metalkugler, -spåner eller metalgranulatet kan ikke forhindre lamellernes frie bevæge-5 lighed.- 3 - the pressure surface for the edge surface and an excellent heat transfer from the heating elements to the slats. The metal balls, shavings, or metal granules loosely disposed in the recess cannot hinder the free movement of the slats.

Den i udsparingen lagrede varme forhindrer et hurtigt fald af temperaturen for lukkefladen ved kontakt med glaskanten.The heat stored in the recess prevents a rapid drop in temperature of the closing surface upon contact with the glass edge.

I kraft af åbningen i centrum for lukkefladen finder der 10 kun varmeoverføring sted ved kanten, dækselmidten forbliver kold. Ved hjælp af den cirkelringformede afstivning i centrum af lukkefladen kan der anvendes fine og tynde lameller, der tilpasser sig udmærket til ujævnhederne i overfladen.Due to the opening in the center of the closing surface, only heat transfer takes place at the edge, the cover center remains cold. By means of the circular stiffening in the center of the closure surface, fine and thin slats can be used which adapt well to the unevenness of the surface.

1515

Opfindelsen skal i det følgende nærmere forklares ved hjælp af tegningen, hvor fig. 1 viser et tværsnit gennem et rundt lukkehoved og en 20 beholder, og fig. 2 og 3 viser hvert et planbillede af en metalskive, som danner lukkefladen.BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail with reference to the accompanying drawings, in which: FIG. 1 shows a cross-section through a round closure head and a container; and FIG. 2 and 3 each show a plan view of a metal disk forming the closing surface.

25 Det i fig. 1 viste lukkehoved er fæstnet til et aksialt bevægeligt løftestempel 3 på en sædvanlig lukkemaskine (ikke vist). En netop under lukkehovedet 1 placeret glasbeholder 5 med lukkekant 6 står på et underlag 7. En skiveformet metalplade 9, som i det følgende bliver nærmere 30 beskrevet, bliver holdt indespændt mellem en med skruer 11 til lukkehoved-legemet 13 presset spændering 15 og lukke-hoved-legemet 13. Det er også muligt at fæstne metalskiven 9 direkte til lukkehoved-legemet med skruer 11.The embodiment of FIG. 1 is attached to an axially movable lifting piston 3 on a conventional sealing machine (not shown). A glass container 5 with closure edge 6 located just below the closure head 1 stands on a base 7. A disc-shaped metal plate 9, which will be described in more detail below, is held between a clamp 15 and a locking member 13 with screws 11 for the closure body 13. main body 13. It is also possible to attach the metal disc 9 directly to the closing head body with screws 11.

Mellem metalskiven 9 og lukkekanten 6 er der indlagt et låg 35 eller et dæksel 8 af metal.Between the metal washer 9 and the closing edge 6 is a lid 35 or a cover 8 of metal.

Metalskiven 9 ligger i centrum på et fremspring 17. I een- - 4 -The metal disc 9 is in the center of a projection 17. In one - 4 -

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trum for fremspringet 17 kan der være anbragt en gennemboring 19, der står i forbindelse med bagsiden af lukke-hovedlegemet 13.drum for the projection 17, a piercing 19 may be provided which is in contact with the back of the closure body 13.

5 Over metalskiven 9 er der anbragt en udsparing 22, der er fyldt med metalkugler, -stumper eller -granulat 21. Lukke-hoved-legemet 13 og den med dette forbundne termisk godt ledende metalskive 9 kan opvarmes ved hjælp af et varmelegeme 23 af ring- eller spiralformet nedlagte tråde. Var-10 melegemet 23 kan være anbragt i lukkeho vedi egernet 13 eller i udsparingen 22 (vist med punkterede linier).5 A recess 22 filled with metal balls, scraps or granules 21 is placed over the metal disc 9. The closing main body 13 and the associated thermally well conductive metal disc 9 can be heated by means of a ring heater 23 - or helical folded threads. The heating element 23 may be disposed in the closure of the spokes 13 or in the recess 22 (shown in dashed lines).

Metalskiven 9, som dækker udsparingen 22, er forsynet med et antal slidser 27, der opdeler metalskiven 9 i lamel-15 ler 25, og som i det væsentlige er radialt forløbende. Slidserne 27, der frembringes ved hjælp af tråderosion eller med en laser, har en bredde af ca. 0,1 mm og ender i en lille afstand d fra omkredsen. I denne ende er slidserne 27 enten V-formet opspaltede eller forgrenede 20 (fig. 2), eller de ender i en rund eller polygonformet udsparing 29 (fig. 3). Afstanden a i trinet 31 mellem enderne af slidsen 27, henholdsvis mellem udsparingerne 29, svarer fortrinsvis ca. til bredden c af lamellerne 25 på den ende, der vender mod centrum, når der 25 findes en central åbning der.The metal disc 9, which covers the recess 22, is provided with a plurality of slots 27 which divide the metal disc 9 into slats 15 and which are substantially radially extending. The slits 27 produced by wire erosion or with a laser have a width of approx. 0.1 mm and ends at a small distance d from the circumference. At this end, the slots 27 are either V-shaped split or branched 20 (Fig. 2), or they end in a round or polygon-shaped recess 29 (Fig. 3). The distance a in the step 31 between the ends of the slot 27 and between the recesses 29, respectively, preferably corresponds to approx. to the width c of the slats 25 at the end facing the center when there is a central opening there.

Lamellerne 25, hvis mod centrum vendende ender blot ligger an mod fremspringet 17, kan ved lukningen bøje sig ved hjælp af den fra lukkekanten 6 virkende kraft og tilpasse 30 sig dennes overfladeudformning. Ved hjælp af det i forhold til bredden af lamellen 25 ved tilslutningsstedet på lukkekanten 6 smalle trin 31 kan lamellerne 25 derudover dreje sig om deres længdeakse og fuldstændigt ligge an mod overfladen af lukkekanten 6. Bredden af slidsen 27 er så lille, 35 at der også der forekommer et tilstrækkeligt tilpasningstryk og en tilstrækkelig varmeoverføring til låget, som skal påsættes ved forsegling.The slats 25, whose ends facing the center merely abut the projection 17, can bend at the closure by the force acting from the closure edge 6 and adapt 30 to its surface configuration. In addition, by means of the narrow step 31 relative to the width of the slat 25 at the connection point on the closing edge 6, the slats 25 can rotate about their longitudinal axis and completely abut the surface of the closing edge 6. The width of the slit 27 is so small that 35 there is a sufficient fitting pressure and a sufficient heat transfer to the lid to be applied by sealing.

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I stedet for radialt forløbende slidser 27 kan man også anvende bølgeformede slidser 27. Metalskiven kan også være udført uden central åbning 33, hvorved der så også kan gives afkald på en afstivning i centrum. Tykkelsen af 5 metalskiven 9, som fortrinsvis består af et elastisk materiale, f.eks. fjederstål, og udviser en hærdet overflade, afhænger af tværsnittet for lukkekanten 6 og andrager for små tværsnit kun nogle tiendedele millimeter; ved større beholdere ca. 1 mm.Instead of radially extending slots 27, corrugated slots 27 may also be used. The metal disk may also be formed without central aperture 33, whereby a stiffening in the center may also be dispensed with. The thickness of the metal disc 9, which preferably consists of an elastic material, e.g. spring steel, and exhibits a hardened surface, depends on the cross-section of the closure edge 6 and amounts to small tenths of millimeters; for larger containers approx. 1 mm.

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Claims

A closure head (1) for sealing a closure film (8) on a container edge (6), in particular on the edge of a glass container (5), consisting of a deformable, heatable metal disc (9) provided with slots ( 27), which extends substantially radially towards the center, characterized in that the slots (27) divide the metal disc (9) into a number of slats (25) of a limited width which are circumferentially connected to the metal disc (27), and that the slats (25) are connected to the metal disk (9) at the point of attachment on the circumference via a narrow step (31) formed by decreasing the width of the slats (25).

A closing head according to claim 1, characterized in that the slot (27) is V-shaped branched to the peripheral side. 15

Closure head according to claim 1, characterized in that circular or polygon-shaped recesses (29) are arranged in the metal disc (9) on the peripheral end of the slots (27). 20

A closing head according to claims 1-3, characterized in that the metal disc (9) is connected along its periphery to the closing head (1) and that a recess (22) is arranged in the closing head (1) in the area over the slats (25). . 25

Closure head according to claim 4, characterized in that the recess (22) is annularly shaped and that the free ends of the slats (25) point towards the center of the metal disc (9) against a protrusion (17) on the closure head ( 1).

Closure head according to claims 4-5, characterized in that the recess (22) is filled with metal balls, chips or granules (21). 35 - 7 - DK 161129 B

Closure head according to claim 6, characterized in that the heating element (23) for heating the metal disc (9) is arranged in the recess (22) and / or above the recess (22).

Closing head according to claims 1-7, characterized in that the metal disc (9) is provided with an opening (33) in the center.

Closure head according to claim 5 or 8, characterized in that the centered end of the slats (25) supports a circular annular projection (17) in the center of the recess (22).

Closure head according to claims 1-9, characterized in that the metal disc (9) is made of a resilient material with a hardened surface. 20 25 30 35