WO1989010313A1 - Process for mounting plastic closures - Google Patents

Process for mounting plastic closures Download PDF

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Publication number
WO1989010313A1
WO1989010313A1 PCT/CH1989/000066 CH8900066W WO8910313A1 WO 1989010313 A1 WO1989010313 A1 WO 1989010313A1 CH 8900066 W CH8900066 W CH 8900066W WO 8910313 A1 WO8910313 A1 WO 8910313A1
Authority
WO
WIPO (PCT)
Prior art keywords
parts
relative
closures
assembly
until
Prior art date
Application number
PCT/CH1989/000066
Other languages
German (de)
French (fr)
Inventor
Werner F. Dubach
Original Assignee
Alfatechnic Ag
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 Alfatechnic Ag filed Critical Alfatechnic Ag
Publication of WO1989010313A1 publication Critical patent/WO1989010313A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0471—Threaded or like caps or cap-like covers secured by rotation with means for positioning the cap on the container, or for limiting the movement of the cap, or for preventing accidental loosening of the cap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/20—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge
    • B65D47/24—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with poppet valves or lift valves, i.e. valves opening or closing a passageway by a relative motion substantially perpendicular to the plane of the seat
    • B65D47/241—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with poppet valves or lift valves, i.e. valves opening or closing a passageway by a relative motion substantially perpendicular to the plane of the seat the valve being opened or closed by actuating a cap-like element
    • B65D47/242—Closures with discharging devices other than pumps comprising hand-operated members for controlling discharge with poppet valves or lift valves, i.e. valves opening or closing a passageway by a relative motion substantially perpendicular to the plane of the seat the valve being opened or closed by actuating a cap-like element moving helically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/20—Frangible elements completely enclosed in closure skirt

Definitions

  • the present invention relates to a method for the assembly of plastic closures, which in the assembled position are connected to a second closure part or the container neck and wherein means are present on both parts which enable the radial position of the two parts to be clearly positioned relative to one another enables.
  • the geometrical circumstances force one to assemble the closure from two parts.
  • Such a closure then has a first part which is placed on a container and a second part which is placed on the first part.
  • Known examples are closures in which the second part is to be kept in a certain position by means of a guarantee band before being used for the first time.
  • the guarantee band also has sawtooth-like teeth protruding towards the center of the closure, while at least one cam is present on the second, rotatable part, which engages behind the teeth.
  • the second locking part cannot be turned to the first.
  • the two locking parts are simply screwed together completely. This is not unproblematic, since the guarantee tape is only molded onto the closure part via thin webs. It happens again and again that these webs are overstretched and tear when screwed together. A final check should therefore be carried out after assembly.
  • this is not possible in terms of price and personnel.
  • the same problem also arises with rotary closures on containers, the container neck of which have the features of the first closure part described above.
  • the object of the invention is therefore to create a method by means of which the closures described above can be installed more quickly and more securely, so that the above-mentioned damage does not occur.
  • This problem is solved by a method according to claim 1. It is a further merit of this invention that, using this assembly method, new construction principles are made possible which previously failed on the assembly.
  • Figure 2 is a view of a twist lock from below Figure 3 in side view and Figure 4 in cross section, and Figure 5 matching the above closure
  • Figure 7 is a plastic closure that can only be assembled according to the inventive method.
  • Figures la-ld which serve to demonstrate the sequence of the assembly process, symbolically show the two parts 10 and 20 to be assembled one on top of the other.
  • 10 represents the upper closure part of a two-part plastic closure or the one-part plastic closure itself
  • 20 represents either the lower part a two-part plastic closure that can be placed on a container neck or represents the container neck itself.
  • 11 and 21 denote those means which enable the unique positioning of the respective part.
  • These can be means specially provided for this purpose, or, due to the special shape of the closure or the container, can already be present features, such as the tab of a guarantee band, a pouring spout of a closure or a handle of a container, without any other means would be excluded.
  • these can be detection features that can be scanned optically or mechanically. The most general case is assumed in FIG. In general, the two parts 10, 20 can be inserted into an assembly device in a pre-oriented manner with respect to their axial direction.
  • the two parts to be assembled are rotated relative to one another about the common axis of rotation D until the positioning means on the two parts 10, 20 are in the predetermined relative position to one another.
  • this can be the case if the two positioning means 11, 21 are in the same position.
  • any other mutual layers can also occur.
  • FIGS. 2-5 show a simple rotary lock and a matching container neck.
  • the plastic closure consists of a simple screw cap 30 with a guarantee band 32 molded onto the lower edge over a severely weakened point 31.
  • Saw-tooth-shaped blocking members 33 are arranged on the latter, towards the center.
  • the guarantee band 32 can be gripped by a tear-off tab 34. Before using for the first time, the guarantee band 32 must be torn off by pulling on the tab 34.
  • the container B (FIG. 5) with the container neck 40 has an external thread 41 and adjoining it a slightly widened shoulder 42.
  • locking members 43 are in turn arranged on the shoulder 42 as in the case of the screw cap in the same arrangement, but not necessarily n the same number, available.
  • the screw blanket simply screwed onto the container neck 40.
  • the locking members should have slid over one another. As already mentioned at the beginning, the guarantee band of the release was often released from the closure.
  • the screw cap 30 can be clearly positioned in the radial direction without additional means.
  • the tear-off tab can be used for this purpose, for example. This means that the relative rotary movement of the screw cap can already take place during the introduction into the assembly device. However, if the guarantee band 32 were designed in such a way that it is blown off by the rotary movement relative to the container neck 40, no tear-off tab would be required. In this case, the screw cap must have a different, additionally molded-on positioning means. As shown, this can be a rib or wart 35 molded onto the circumference of the guarantee band, but also onto the rotating cap itself.
  • the container B If this is asymmetrical, the radial positioning can again take place during the pre-orientation in the feed phase. However, if the container is rotationally symmetrical, a special radial alignment device must also be used. be brought. For example, this is a rib or wart 44 formed underneath the shoulder 42. Of course, the positioning means can be designed as desired and, depending on the situation, can also be optically or mechanically scanned. Although it goes without saying, for the sake of completeness it should be mentioned that the container neck does not have to be made of plastic, but can be made of any material with sufficient strength.
  • the example according to FIG. 7 is intended to clarify that the method also allows completely new closure designs that would not be possible with the conventional assembly method.
  • the closure shown here in section is a so-called central pin lock.
  • This plastic closure is in two parts. It has a lower part 50 and an upper part 60.
  • the lower part 50 has an external thread 51 at the top and the upper part 60 has an internal thread 61.
  • a central pin 52 is connected at a distance by means of webs 53 to the wall area 54 provided with an external thread 51. Lateral outlet openings 55 are between the webs 53.
  • the upper part 60 is like a simple screw cap with a central outlet opening 62 in the upper cover surface 63
  • the central pin 52 lies sealingly in the outlet opening 62, the upper side of the pin 52 being flush with the cover surface 63 of the upper part 60.
  • Such closures are known per se. However, they must be secured against being accidentally screwed on completely. So far, this has usually been done by means of an annular bead on the inside of the upper part and on the outside of the lower part. Nevertheless, overturning was possible and the stroke was gradual and not suddenly hard.
  • the two-part plastic closure shown here now has, on the upper closure part 60, radially inwardly directed, axially extending stop walls 64 and at least one stop wall 56 which is injection molded onto one of the webs 53.
  • the two externally perfect rotationally symmetrical parts can now be introduced radially repositioned into the assembly device.
  • the two parts 50, 60 are brought together in the axial direction. If they lie on top of one another, the two parts are rotated relative to one another, this advantageously being done by holding one part 50 and rotating the other part 60. Grab it the two threads 51, 61 into each other. The rotary movement ends as soon as the two stop walls 56, 64 collide. The stop walls thus serve as radial positioning means. Then you push the two parts together according to the procedure, whereupon the closure is in the shooting range.
  • the now closed closure can now be mounted on a container according to the conventional method.

Abstract

One or two parts of a plastic closure and a container with a neck (10, 20) are aligned in the direction of their common axis of rotation (D) (Fig. 1a). In a second step, the two parts are moved together until they touch (Fig. 1b). The two parts (10, 20) are then turned radially relative to each other until the positioning means (11, 21) have a predetermined mutual alignment (Figure 1c). Finally, the two parts (10, 20) are pushed together in the direction of the axis of rotation (D), so that the screw threads (12, 22) of both parts interlock (Fig. 1d). The mounting process ensures an excellent connection between the two parts and makes it possible to obtain plastic closures of novel design.

Description

VERFAHREN ZUR MONTAGE VON KüNSTSTOFFVERSCHLUESSEN METHOD FOR ASSEMBLING PLASTIC LATCHES
Die vorliegende Erfindung betrifft ein Verfahren zur Mon¬ tage von Kunststoffverschl üssen , die in montierter Stel¬ lung mit einem zweiten Verschlussteil oder dem Behälter¬ hals verbunden sind und wobei an beiden Teilen Mittel vorhanden sind, die eine eindeutige Positionierung der radialen Lage beider Teile zueinander ermöglicht. Bei einer Vielzahl von komplizierten KunststoffVerschlüs¬ sen ist man aus den geometrischen Gegebenheiten heraus gezwungen, den Verschluss aus zwei Teilen zusammenzu¬ setzen. Ein solcher Verschluss hat dann einen ersten Teil , der auf einem Behälter aufgesetzt wird und einen zweiten Teil der auf dem ersten Teil aufgesetzt ist. Be¬ kannte Beispiele sind Verschlüsse, bei denen der zweite Teil vor dem erstmaligen Gebrauch in einer bestimmten La¬ ge mittels einem Garantieband gehalten werden soll. Hier- zu weist das Garantieband zum Zentrum des Verschlusses hin ragende sägezahnartige Zacken auf, während am zwei¬ ten, drehbaren Teil mindestens ein Nocken vorhanden ist, der hinter den Zacken eingreift.The present invention relates to a method for the assembly of plastic closures, which in the assembled position are connected to a second closure part or the container neck and wherein means are present on both parts which enable the radial position of the two parts to be clearly positioned relative to one another enables. In the case of a large number of complicated plastic closures, the geometrical circumstances force one to assemble the closure from two parts. Such a closure then has a first part which is placed on a container and a second part which is placed on the first part. Known examples are closures in which the second part is to be kept in a certain position by means of a guarantee band before being used for the first time. Here- the guarantee band also has sawtooth-like teeth protruding towards the center of the closure, while at least one cam is present on the second, rotatable part, which engages behind the teeth.
Solange das Garantieband noch nicht entfernt ist, lässt sich der zweite Verschlussteil zum ersten nicht drehen. Bei der Montage werden die beiden Verschlussteile einfach vollständig zusammengeschraubt. Dies ist nicht unproble¬ matisch, ist doch das Garantieband nur über dünne Stege am Verschlussteil angespritzt. Es kommt immer wieder vor, dass beim Zusammenschrauben diese Stege überdehnt werden und reissen. Daher sollte nach der Montage eine Schluss¬ kontrolle durchgeführt werden. Dies ist jedoch bei einer vollautomatischen Massenproduktion preislich und perso¬ nell nicht möglich.As long as the guarantee band has not yet been removed, the second locking part cannot be turned to the first. During assembly, the two locking parts are simply screwed together completely. This is not unproblematic, since the guarantee tape is only molded onto the closure part via thin webs. It happens again and again that these webs are overstretched and tear when screwed together. A final check should therefore be carried out after assembly. However, in the case of fully automated mass production, this is not possible in terms of price and personnel.
Das gleiche Problem stellt sich auch bei Drehverschlüssen auf Behälter, deren Behälterhals die Merkmale des oben beschriebenen ersten Verschlussteiles aufweisen. Die Erfindung stellt sich daher zur Aufgabe, ein Ver¬ fahren zu schaffen, mittels dem die eingangs beschriebe¬ nen Verschlüsse schneller und sicherer montiert werden können, so dass die obengenannten Schäden nicht auftre¬ ten. Diese Aufgabe löst ein Verfahren gemäss Patentanspruch 1. Es ist ein weiteres Verdienst dieser Erfindung, dass unter Anwendung dieses Montageverfahrens neue Konstruk¬ tionsprinz pien ermöglicht werden, die früher an der Mon¬ tage scheiterten.The same problem also arises with rotary closures on containers, the container neck of which have the features of the first closure part described above. The object of the invention is therefore to create a method by means of which the closures described above can be installed more quickly and more securely, so that the above-mentioned damage does not occur. This problem is solved by a method according to claim 1. It is a further merit of this invention that, using this assembly method, new construction principles are made possible which previously failed on the assembly.
Zur Erläuterung des Verfahrens ist dieses in der Zeich¬ nung symbolisch dargestellt und sind zwei beispielsweise Ausführungen detailliert aufgezeigt und anhand der nach¬ folgenden Beschreibung erklärt. Es zeigt:To explain the method, this is shown symbolically in the drawing and two examples, for example, are shown in detail and explained on the basis of the following description. It shows:
Figur la-ld eine symbolische schrittweise Darstellung desFigure la-ld a symbolic step-by-step representation of the
Montageverfahrens; Figur 2 eine Ansicht eines Drehverschlusses von unten Figur 3 in Seitenansicht und Figur 4 im Querschnitt, sowie Figur 5 den zum obigen Verschluss passendenAssembly process; Figure 2 is a view of a twist lock from below Figure 3 in side view and Figure 4 in cross section, and Figure 5 matching the above closure
Behälterhals in Seitenansicht; Figur 6a&b zeigen für das Verfahren besonders geeigneteSide view of container neck; Figures 6a & b show particularly suitable for the method
Gewinde im Schnitt und schliesslich Figur 7 einen Kunststoffverschl uss der nur nach dem erfi ndungsgemässen Verfahren montiert werden kann. Die Figuren la-ld die zur Demonstration des Ablaufs des Montageverfahrens dienen, zeigen symbolisch die beiden aufeinander zu montierenden Teile 10 und 20. Hierbei stellt 10 den oberen Verschlussteil eines zweiteiligen Kunststoffverschlusses oder den einteiligen Kunststoff- verschluss selbst dar, während 20 entweder den unteren Teil eines zweiteiligen Kunststoffverschl usses, der auf einen Behälterhals aufsetzbar ist oder den Behälterhals selber darstellt.Thread in section and finally Figure 7 is a plastic closure that can only be assembled according to the inventive method. Figures la-ld, which serve to demonstrate the sequence of the assembly process, symbolically show the two parts 10 and 20 to be assembled one on top of the other. Here, 10 represents the upper closure part of a two-part plastic closure or the one-part plastic closure itself, while 20 represents either the lower part a two-part plastic closure that can be placed on a container neck or represents the container neck itself.
Mit 11 beziehungsweise 21 sind jene Mittel bezeichnet, die die eindeutige Positionierung des jeweiligen Teiles ermöglichen. Dies können speziell für diesen Zweck ange¬ brachte Mittel sein, oder durch die spezielle Formgebung des Verschlusses beziehungsweise des Behälters bereits vorhandene Merkmale sein, wie die Lasche eines Garantie¬ bandes, ein Ausgusschnabel eines Verschlusses oder ein Henkel eines Behälters, ohne dass nochmals andere Mittel ausgeschlossen wären. Ganz prinzipiell können dies op¬ tisch oder mechanisch abtastbare Erkennungsmerkmale sein. In der Figur 1 wird vom allgemeinsten Fall ausgegangen. Generell können die beiden Teile 10,20 bezüglich ihrer axialen Richtung vororientiert in ein Montagegerät einge¬ setzt sein. Dies bedeutet, dass die beiden Teile in axia- ler Richtung bezüglich der gemeinsamen Drehachse D der beiden über ein Gewinde verbindbaren Teile so ausgerich¬ tet sind, dass beide Teile in der Zusam enfüg-Ri chtung liegen (männlichen Teil auf weiblichen Teil gerichtet). Im zweiten in Figur lb dargestellten Schritt werden die beiden Teile 10, 20 in Richtung ihrer gemeinsamen, fluch¬ tenden Drehachse D aufei nanderzugeschoben , bis sie auf- ei nanderstossen .11 and 21 denote those means which enable the unique positioning of the respective part. These can be means specially provided for this purpose, or, due to the special shape of the closure or the container, can already be present features, such as the tab of a guarantee band, a pouring spout of a closure or a handle of a container, without any other means would be excluded. In principle, these can be detection features that can be scanned optically or mechanically. The most general case is assumed in FIG. In general, the two parts 10, 20 can be inserted into an assembly device in a pre-oriented manner with respect to their axial direction. This means that the two parts in axia- The direction with respect to the common axis of rotation D of the two parts which can be connected via a thread is oriented such that the two parts lie in the mating direction (male part directed towards female part). In the second step shown in FIG. 1b, the two parts 10, 20 are pushed towards one another in the direction of their common, aligned axis of rotation D until they collide with one another.
Im darauffolgenden Schritt (Figur lc) werden die beiden zu montierenden Teile relativ zueinander um die gemein¬ same Drehachse D gedreht, bis die Positionierungsmittel an den beiden Teilen 10, 20 in der vorbestimmten Relativ¬ lage zueinander liegen. Dies kann wie im dargestellten Beispiel dann der Fall sein, wenn die beiden Positio¬ nierungsmittel 11, 21 in gleicher Lage sind. In anderen Anwendungen können auch beliebige andere gegenseitige Lagen vorkommen. Es ist jedoch erforderlich, dass der Gewindeanfang des einen Teiles und das Gewindeende des anderen Teiles bezüglich der nachfolgenden Stossri chtung genau übereinander liegen, damit in der vollständig zusammengestossenen Lage die Gewindeerhöhung des einen Teiles genau in die Gewinderille des anderen Teiles passt . Ist diese axiale Ausrichtung erfolgt, so lassen sich die beiden Teile mit einem gewissen Kraftaufwand ineinander- stossen, wobei die beiden Gewinde 12, 22 an den beiden Teilen rätschenarti g übereinander gleiten. Dieses schein¬ bar einfache Montageverfahren widerstrebt anfänglich je¬ dem Fachmann. Es widerspricht seiner maschinenbaulichen Grundkenntnisse. Jedes Metallgewinde würde bei einer solchen Montage unweigerlich zerstört. Messungen an Kunststoffverschlüssen, die nach diesem Verfahren mon¬ tiert wurden zeigten jedoch verbesserte Eigenschaften, entgegen den Erwartungen der Fachleute. So wurde festge¬ stellt, dass insbesondere Kunststoffverschl üsse, die di¬ rekt aus der Spritzmaschine noch warm nach diesem Ver¬ fahren montiert wurden, nachdem sie vollständig abgekühlt waren, eine höhere Abreissfestigkeit aufweisen. Dies lässt sich dadurch erklären, dass die Gewindeerhöhungen den beiden Teilen leicht sägezahnförmig deformiert wer¬ den. Hierdurch liegen im montierten Zustand jeweils zwei steilere Gewindeflanken aufeinander, wodurch die Spreiz¬ wirkung beim Abreissversuch geringer ist. Genauso verblüffend ist auch die Tatsache, dass ein derart montierter Verschluss beziehungswei e, dass derart montierte Verschlussteile eine höhere Dichtigkeit auf- weisen. Die Erklärung ergibt sich aus der Tatsache, dass bei der normalen Schraubmontage die Dichtflächen aneinan¬ der schleifen und die Oberflächen geringfügig verkratzen. Die so entstandenen Mikrorillen vermindern die Dichtig¬ keit zwischen den beiden Teilen.In the subsequent step (FIG. 1 c), the two parts to be assembled are rotated relative to one another about the common axis of rotation D until the positioning means on the two parts 10, 20 are in the predetermined relative position to one another. As in the example shown, this can be the case if the two positioning means 11, 21 are in the same position. In other applications, any other mutual layers can also occur. However, it is necessary that the thread start of one part and the thread end of the other part lie exactly above one another with respect to the subsequent impact direction, so that in the completely collapsed position the thread increase of one part fits exactly into the thread groove of the other part. Once this axial alignment has taken place, the two parts can be pushed into one another with a certain amount of force, the two threads 12, 22 sliding one above the other on the two parts in a riddle-like manner. This apparently simple assembly method initially resists the skilled person. It contradicts his basic knowledge of mechanical engineering. Any metal thread would inevitably be destroyed in such an assembly. Measurements on plastic closures that were assembled by this method, however, showed improved properties, contrary to the expectations of the experts. It was thus found that plastic closures in particular, which were assembled directly from the injection molding machine while still warm after this process, after they had completely cooled, have a higher tear-off strength. This can be explained by the fact that the thread increases in the two parts are slightly deformed in a sawtooth shape. As a result, two steeper thread flanks lie one on top of the other in the assembled state, as a result of which the spreading effect when tearing off is less. Just as astonishing is the fact that a closure assembled in this way or that closure components assembled in this way have a higher level of tightness. point. The explanation arises from the fact that, during normal screw mounting, the sealing surfaces rub against one another and the surfaces scratch slightly. The resulting micro-grooves reduce the tightness between the two parts.
In den Figuren 2-5 ist ein einfacher Drehverschi uss , sowie ein dazu passender Behälterhals dargestellt. Der Kunststoffverschl uss besteht aus einer einfachen Schraub¬ kappe 30 mit einer am unteren Rand über einer stark geschwächten Stelle 31 angespritzten Garantieband 32. An diesem sind zum Zentrum hin gerichtete, sägezahnförmi ge Sperrorgane 33 angeordnet. Das Garantieband 32 kann an einer Abreisslasche 34 gefasst werden. Vor dem erstma¬ ligen Gebrauch muss man durch Zug an der Lasche 34 das Garantieband 32 abreissen.FIGS. 2-5 show a simple rotary lock and a matching container neck. The plastic closure consists of a simple screw cap 30 with a guarantee band 32 molded onto the lower edge over a severely weakened point 31. Saw-tooth-shaped blocking members 33 are arranged on the latter, towards the center. The guarantee band 32 can be gripped by a tear-off tab 34. Before using for the first time, the guarantee band 32 must be torn off by pulling on the tab 34.
Der Behälter B (Figur 5) mit dem Behälterhals 40 hat ein Aussengewinde 41 und daran anschl i essend eine leicht verbreiterte Schulter 42. Radial nach aussen gerichtet sind an der Schulter 42 wiederum Sperrorgane 43 wie beim Schraubdeckel in der gleichen Anordnung, jedoch nicht zwangsläufig n der gleichen Anzahl, vorhanden. Beim bisherigen Montageverfahren hätte man den Schraub- decke! einfach auf den Behälterhals 40 aufgeschraubt. Da¬ bei hätten die Sperrorgane übereinander gleiten müssen. Wie bereits eingangs erwähnt, löste sich dabei das Garan¬ tieband des öftern vom Verschluss.The container B (FIG. 5) with the container neck 40 has an external thread 41 and adjoining it a slightly widened shoulder 42. Radially outward, locking members 43 are in turn arranged on the shoulder 42 as in the case of the screw cap in the same arrangement, but not necessarily n the same number, available. With the previous assembly process, the screw blanket! simply screwed onto the container neck 40. The locking members should have slid over one another. As already mentioned at the beginning, the guarantee band of the release was often released from the closure.
In diesem Beispiel lässt sich die Schraubkappe 30 ohne zusätzliche Mittel in radialer Richtung eindeutig posi¬ tionieren. Hierzu kann beispielsweise die Abreisslasche dienen. Dies bedeutet, dass die relative Drehbewegung der Schraubkappe bereits während der Einführung in das Mon¬ tagegerät erfolgen kann. Würde man jedoch das Garan¬ tieband 32 derart gestalten, dass es durch die Dreh¬ bewegung relativ zum Behälterhals 40 abgesprengt wird, würde man keine Abreisslasche benötigen. In diesem Fall muss der Schraubdeckel ein anderes, zusätzlich angeform¬ tes Positionierungsmittel haben. Dies kann wie darge¬ stellt eine am Umfang des Garantiebandes, aber auch an der Drehkappe selber, angespritzte Rippe oder Warze 35 sei n .In this example, the screw cap 30 can be clearly positioned in the radial direction without additional means. The tear-off tab can be used for this purpose, for example. This means that the relative rotary movement of the screw cap can already take place during the introduction into the assembly device. However, if the guarantee band 32 were designed in such a way that it is blown off by the rotary movement relative to the container neck 40, no tear-off tab would be required. In this case, the screw cap must have a different, additionally molded-on positioning means. As shown, this can be a rib or wart 35 molded onto the circumference of the guarantee band, but also onto the rotating cap itself.
Aehnliches gilt auch für den Behälter B. Ist dieser asym¬ metrisch so kann die radiale Positionierung wiederum bei der Vororientierung in der Zuführungsphase erfolgen. Ist jedoch der Behälter rotationssymmetrisch so muss auch hier ein spezielles Mittel zur radialen Ausrichtung ange- bracht sein. Zum Beispiel ist dies eine unterhalb der Schulter 42 angeformte Rippe oder Warze 44. Selbstver¬ ständlich lassen sich die Positionierungsmittel beliebig gestalten und je nachdem auch optisch oder mechanisch ab¬ tasten. Es ist zwar selbstverständlich, jedoch sei der Vollständigkeit halber erwähnt, dass der Behälterhals nicht aus Kunststoff sein muss, sondern aus einem beliebigen Material mit genügender Festigkeit hergestellt sein kann.The same also applies to the container B. If this is asymmetrical, the radial positioning can again take place during the pre-orientation in the feed phase. However, if the container is rotationally symmetrical, a special radial alignment device must also be used. be brought. For example, this is a rib or wart 44 formed underneath the shoulder 42. Of course, the positioning means can be designed as desired and, depending on the situation, can also be optically or mechanically scanned. Although it goes without saying, for the sake of completeness it should be mentioned that the container neck does not have to be made of plastic, but can be made of any material with sufficient strength.
Das Beispiel gemäss Figur 7 soll verdeutlichen, dass das Verfahren auch vollständig neue Verschl usskonstrukti onen erlaubt, die mit der herkömmlichen Montagemethode nicht möglich wären. Der hier im Schnitt dargestellte Ver¬ schluss ist ein sogenannter Zentral stiftverschl uss . Die¬ ser Kunststoffverschl uss ist zweiteilig. Er hat einen Un¬ terteil 50 und einen Oberteil 60. Der Unterteil 50 hat oben ein Aussengewinde 51 und der Oberteil 60 ein Innengewinde 61. Ein zentraler Stift 52 ist mittels Stegen 53 mit dem, mit Aussengewinde 51 versehenen Wandbereich 54 distanziert verbunden. Zwischen den Stegen 53 sind seitliche Auslassöffnungen 55. Der Oberteil 60 gleicht einem einfachen Schraubdeckel mit einer zentralen Auslassöffnung 62 in der oberen Deckfläche 63. In der geschl ossenen Lage des zweiteiligen Verschlusses liegt der zentrale Stift 52 dichtend in der Auslassöffnung 62, wobei die Oberseite des Stiftes 52 mit der Deckfläche 63 des oberen Teiles 60 fluchtet. Solche Verschlüsse sind an sich bekannt. Sie müssen jedoch gegen ein ungewolltes vollständiges Anschrauben gesichert werden. Dies geschah bisher üblicherweise durch je eine Ringwulst an der Innenseite des oberen und an der Aussenseite des unteren Teiles. Trotzdem war ein überdrehen möglich und der Anschlag war nur allmählich und nicht schlagartig hart. Der hier dargestellte zweiteilige Kunststoffverschi uss hat nun am oberen Verschlussteil 60 radial nach innen gerichtete, axial verlaufende Anschlagwände 64 und min¬ destens eine eben solche Anschlagwand 56, die auf einem der Stege 53 angespritzt ist.The example according to FIG. 7 is intended to clarify that the method also allows completely new closure designs that would not be possible with the conventional assembly method. The closure shown here in section is a so-called central pin lock. This plastic closure is in two parts. It has a lower part 50 and an upper part 60. The lower part 50 has an external thread 51 at the top and the upper part 60 has an internal thread 61. A central pin 52 is connected at a distance by means of webs 53 to the wall area 54 provided with an external thread 51. Lateral outlet openings 55 are between the webs 53. The upper part 60 is like a simple screw cap with a central outlet opening 62 in the upper cover surface 63 When the two-part closure is in the closed position, the central pin 52 lies sealingly in the outlet opening 62, the upper side of the pin 52 being flush with the cover surface 63 of the upper part 60. Such closures are known per se. However, they must be secured against being accidentally screwed on completely. So far, this has usually been done by means of an annular bead on the inside of the upper part and on the outside of the lower part. Nevertheless, overturning was possible and the stroke was gradual and not suddenly hard. The two-part plastic closure shown here now has, on the upper closure part 60, radially inwardly directed, axially extending stop walls 64 and at least one stop wall 56 which is injection molded onto one of the webs 53.
Beim erfi ndungsgem ssen Montageverfahren können nun die beiden äusserlich vollkommenen rotationssymmetrischen Teile radial umpositioniert in das Montagegerät einge¬ führt werden. Nun führt man die beiden Teile 50, 60 in axialer Richtung zusammen. Liegen sie aufeinander auf so dreht man die beiden Teile relativ zueiander, wobei dies vorteil afterweise dadurch geschieht, dass man einen Teil 50 festhält und den anderen Teil 60 dreht. Dabei greifen die beiden Gewinde 51, 61 ineinander. Die Drehbewegung endet, sobald die beiden Anschlagwände 56, 64 aufein- anderstossen . Somit dienen die Anschlagwände als radiale Positionierungsmittel. Danach stösst man die beiden Teile verfahrensgemäss zusammen, worauf der Verschluss in der Schi iesstel 1 ung ist. Der nun geschlossene Verschluss kann nun nach herkömmlicher Methode auf einem Behälter mon¬ tiert werden. In the assembly method according to the invention, the two externally perfect rotationally symmetrical parts can now be introduced radially repositioned into the assembly device. Now the two parts 50, 60 are brought together in the axial direction. If they lie on top of one another, the two parts are rotated relative to one another, this advantageously being done by holding one part 50 and rotating the other part 60. Grab it the two threads 51, 61 into each other. The rotary movement ends as soon as the two stop walls 56, 64 collide. The stop walls thus serve as radial positioning means. Then you push the two parts together according to the procedure, whereupon the closure is in the shooting range. The now closed closure can now be mounted on a container according to the conventional method.

Claims

P A T E N T A N S P R U E C H E PATENT CLAIMS
1. Verfahren zur Montage von Kunststoffverschlüssen die in montierter Stellung mit einem zweiten Verschluss¬ teil oder dem Behälterhals verbunden sind, wobei an beiden Teilen Mittel vorhanden sind, die eine eindeu¬ tige Positionierung der radialen Lage beider Teile zu¬ einander ermöglicht, dadurch gekennzeichnet, dass die beiden zu montierenden Teile in axialer Richtung be¬ züglich der Drehachse der verbindenden Teile aufeinan¬ der zu geführt werden bis die beiden Teile aufeinander liegen, worauf mindestens ein Teil relativ zum anderen so weit gedreht wird, bis die vorhandenen Mittel zur Positionierung in einer vorgegebenen Relativlage zu¬ einander liegen, worauf die beiden Teile in axialer Richtung in die Schi i esstel 1 ung zusammengeschoben wer¬ den.1. A method for assembling plastic closures which are connected in the assembled position to a second closure part or the container neck, means being provided on both parts which enable the radial position of the two parts to be positioned clearly relative to one another, characterized in that that the two parts to be assembled are brought together in the axial direction with respect to the axis of rotation of the connecting parts until the two parts lie on one another, whereupon at least one part is rotated relative to the other until the existing means for positioning in one predetermined relative position to each other, whereupon the two parts are pushed together in the axial direction into the slot 1.
2. Verfahren nach Anspruch 1, zur Montage von zweiteili¬ gen Verschlüssen dadurch gekennzeichnet, dass die bei¬ den Teile in einem Werkzeug gespritzt werden und so¬ gleich nach der Spritzphase noch in der Spritzmaschine zusammengeschoben werden.2. The method according to claim 1, for the assembly of two-part closures, characterized in that the two parts are injection molded in a tool and so immediately after the injection phase in the injection molding machine be pushed together.
3. Verfahren nach Anspruch 1 zur Montage zweiteiliger Verschlüsse, deren relative Drehbewegung durch An¬ schlagmittel begrenzt ist, dadurch gekennzeichnet, dass mindestens ein Teil relativ zum anderen soweit gedreht wird, bis die Anschlagmittel an beiden Teilen aufeinander stossen, worauf die beiden Teile in axia¬ ler Richtung zusammengeschoben werden.3. The method according to claim 1 for the assembly of two-part closures, the relative rotary movement of which is limited by stop means, characterized in that at least one part is rotated relative to the other until the stop means abut on both parts, whereupon the two parts in axia ¬ ler direction are pushed together.
4. Verfahren nach Anspruch 1, zur Montage von Kunststoff¬ verschlüssen, die in montierter Stellung über ein Ge¬ winde mit einem zweiten Verschlussteil oder dem Behäl¬ terhals verbunden sind, dadurch gekennzeichnet, dass bei der relativen Drehbewegung beider Teile zueinander die Gewinde ineinandergreifen.4. The method according to claim 1, for the assembly of plastic closures which are connected in the assembled position via a thread to a second closure part or the container neck, characterized in that the threads engage with one another during the relative rotational movement of the two parts.
5. Verfahren nach Anspruch 1 zur Montage von Verschlüs¬ sen, deren Formgestaltung eine positionierte Zuführung beider Teile in ein Montagegerät erlauben, dadurch gekennzeichnet, dass die relative Drehbewegung mindes¬ tens einer der beiden Teile um einen immer gleichen Wi nkel erfol gt . 5. The method according to claim 1 for the assembly of closures, the shape of which allows a positioned feeding of both parts into a mounting device, characterized in that the relative rotary movement of at least one of the two parts takes place around a constant angle.
6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die beiden Teile in der relativen radialen Win¬ kellage unpositi oni ert aufeinander zugeführt werden, und dass mindestens einer der beiden Teile solange in radialer Richtung gedreht wird, bis die beiden zur Po¬ sitionierung dienenden Mittel deckungsgleich über¬ einander liegen, wobei die Abtastung der Positio¬ nierungsmittel mechanisch und/oder optisch erfolgt.6. The method according to claim 1, characterized in that the two parts in the relative radial angular position are unpositi oni fed to each other, and that at least one of the two parts is rotated in the radial direction until the two serving for positioning Means lie congruently one above the other, the positioning means being scanned mechanically and / or optically.
7. Verfahren nach Anspruch 1 zur Montage von Verschlüssen von denen mindestens ein Teil eine Formgestaltung auf¬ weist, die eine positionierte Zuführung in ein Mon¬ tagegerät erlaubt, dadurch gekennzeichnet, dass die relative Drehbewegung mindestens einer der beiden Teile solange erfolgt, bis die Positionierungsmittel in der erforderlichen Relativlage zueinander liegen, wobei die Positionierungsmittel des nicht positionier¬ ten Teiles mechanisch und/oder optisch abgetastet werden. 7. The method according to claim 1 for the assembly of closures, of which at least one part has a shape that allows a positioned feed into a mounting device, characterized in that the relative rotary movement of at least one of the two parts takes place until the positioning means lie in the required relative position to one another, the positioning means of the non-positioned part being mechanically and / or optically scanned.
PCT/CH1989/000066 1988-04-25 1989-04-04 Process for mounting plastic closures WO1989010313A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1531/88-9 1988-04-25
CH1531/88A CH676226A5 (en) 1988-04-25 1988-04-25

Publications (1)

Publication Number Publication Date
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Application Number Title Priority Date Filing Date
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EP (1) EP0374203A1 (en)
JP (1) JPH02504014A (en)
AU (1) AU3438189A (en)
CH (1) CH676226A5 (en)
WO (1) WO1989010313A1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP0645318A1 (en) * 1993-09-24 1995-03-29 BORMIOLI METALPLAST S.p.A. A capping system for bottles containing still water
ITUB20153391A1 (en) * 2015-09-03 2017-03-03 Inglass Spa Molding method and relative mold with In-Mold Assembly technology

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271103B (en) * 1992-09-29 1996-01-31 Ryford Ltd Improvements relating to bottle caps
JP4610777B2 (en) * 2001-04-25 2011-01-12 コンビ株式会社 Beverage container with straw

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Publication number Priority date Publication date Assignee Title
US3319843A (en) * 1965-12-06 1967-05-16 Stull Engraving Co Captive closure cap construction
US3461488A (en) * 1966-04-08 1969-08-19 Rexall Drug Chemical Mold ejection assemblable two-piece cap
FR2023476A1 (en) * 1968-11-16 1970-08-21 Werner & Mertz Gmbh
GB1480744A (en) * 1974-11-08 1977-07-20 Mardon Illingworth Injection moulding
EP0034998A2 (en) * 1980-02-21 1981-09-02 Albert Obrist AG Screw cap and method of closing the mouth of a container
EP0176206A2 (en) * 1984-08-17 1986-04-02 The Clorox Company Container closure configuration

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3319843A (en) * 1965-12-06 1967-05-16 Stull Engraving Co Captive closure cap construction
US3461488A (en) * 1966-04-08 1969-08-19 Rexall Drug Chemical Mold ejection assemblable two-piece cap
FR2023476A1 (en) * 1968-11-16 1970-08-21 Werner & Mertz Gmbh
GB1480744A (en) * 1974-11-08 1977-07-20 Mardon Illingworth Injection moulding
EP0034998A2 (en) * 1980-02-21 1981-09-02 Albert Obrist AG Screw cap and method of closing the mouth of a container
EP0176206A2 (en) * 1984-08-17 1986-04-02 The Clorox Company Container closure configuration

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645318A1 (en) * 1993-09-24 1995-03-29 BORMIOLI METALPLAST S.p.A. A capping system for bottles containing still water
ITUB20153391A1 (en) * 2015-09-03 2017-03-03 Inglass Spa Molding method and relative mold with In-Mold Assembly technology
WO2017037603A1 (en) * 2015-09-03 2017-03-09 Inglass S.P.A. Method and mold of integrated injection molding and in- mold-assembly

Also Published As

Publication number Publication date
CH676226A5 (en) 1990-12-28
JPH02504014A (en) 1990-11-22
EP0374203A1 (en) 1990-06-27
AU3438189A (en) 1989-11-24

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