EP1463670B1 - Method for producing a combined packing container and a device for carrying out said method - Google Patents

Abstract

As part of a method for producing a combination packaging container ( 28 ), which combination packaging container ( 28 ) comprises a beaker-shaped plastic inner part ( 15 ) and a casing-type outer part ( 14 ) surrounding the plastic inner part ( 15 ) and retained on the external face of the plastic inner part ( 15 ) in an interlocking arrangement, and by which method the two parts ( 14, 15 ) are pushed one in the other in an interlocking arrangement, the assembly process is improved due to the fact that the outer part ( 14 ) is retained in a holder ( 13 ) and the plastic inner part ( 15 ) is introduced into the outer part ( 14 ) retained in the holder ( 13 ) and then pushed down into the outer part ( 14 ) so as to interlock.

Description

TECHNICAL AREA

The present invention relates to the field of packaging technology. It concerns a method for producing a combination packaging container according to the preamble of claim 1 and an apparatus for carrying out the method.

STATE OF THE ART

Applicant's earlier application WO-A1-98 / 13270 discloses a combination packaging container in which a cup-shaped plastic inner part and a jacket-shaped Outer part (e.g., cardboard) is first prepared separately and then to form the final Container are pushed into each other and latched together. Problematic Above all, this is the process of latching connection, with a deformation the relatively thin-walled plastic inner part is connected. The deformation hangs together with that on the bottom of the plastic inner part arranged bead with oversize must be forced through the downwardly narrowing outer part to to latch behind.

In the previously used assembly process, the prefabricated outer part with a Pliers grabbed and pushed over the held in a recording plastic inner part. However, such an approach is not without its problems: on the one hand is a mobile Gripper tongs structurally complicated and prone to failure. It can also be during the gripping process easy to damage the applied on the outside of the outer part, usually come high-quality print image. On the other hand allows a carried out with a grasping forceps Assembly process only comparatively limited cycles, so that to ensure a high throughput with great effort several similar stations in parallel must be operated.

PRESENTATION OF THE INVENTION

It is therefore an object of the invention to provide a method for the production of latching connected Combination packaging containers to create, which with reduced equipment costs can be realized and at the same time high reliability a high throughput allows to specify and a device for its implementation.

The object is solved by the entirety of the features of claims 1 and 21. Of the The core of the invention is to keep the outer part in a receptacle and the plastic inner part first introduce into the outer part held in the receptacle, in particular insert loosely and then click into the outer part latching, wherein Preferably plastic inner part and outer part in the direction of the ground to - so in the normal position of use taper downwards to - conically. It can vary depending on the selected Mounting position, the plastic inner part, e.g. inserted from above or below in the outer part become.

Another advantageous procedure is achieved when the plastic inner part in a first station in the held in the receptacle outer part is loosely inserted and that the loosely inserted plastic inner part in a second station in the outer part latched pressed becomes. This allows an even higher number of cycles for the production can be achieved since the insertion process and the subsequent locking process in different workstations is carried out.

Furthermore, a particularly preferred embodiment of the method is characterized in that that the Eindrückbewegung the plastic inner part in the outer part in the same station is performed, such as the insertion movement of the plastic inner part in the outer part. Thereby An additional workstation can be saved, saving system costs can be.

Another advantage is a procedure when at the same time during the insertion movement of the Plastic inside part held in the receptacle outer part of the outer part in the direction of movement the plastic inner part opposite direction relative to the plastic inner part is moved, since so with lower absolute movement speed the Share the same relative movement speed due to the shorter paths have each other during the joining process and so the cycle number is not detrimental being affected.

A preferred embodiment of the method according to the invention is characterized in that that the plastic inner part has a substantially flat bottom, and that the Plastic inner part is held when loose insertion into the outer part of the ground, wherein the plastic inner part preferably from one passing through the outer part from below Holding device on the outside of the soil releasably held and in the outer part is involved. The holding device holds the plastic inner part detachably by means of a suction cup. This will be a safe drive connection during the retraction movement achieved between the plastic inner part and the holding device, whereby a trouble-free and above all safe pre-positioning of the plastic inner part within the Outside is achieved.

Furthermore, in this method is advantageous if for holding or locking of plastic inner part and outer part are provided on the plastic inner part latching means and a first locking means in the region of the open end side of the plastic inner part through the sealing flange is formed and if another locking means in the area of the soil by at least a running at least partially over the circumference of the plastic inner part Bead is formed. It is particularly advantageous if the bead over the circumference of the plastic inner part is formed circumferentially. As a result, a support function of the plastic inner part be achieved by the outer part and so relatively high axial stacking forces in the Combi packaging are introduced without causing the plastic inner part damage suffers and so inadvertently stores the medium stored in his recording room leaking or spoil due to increased air supply.

Another preferred embodiment of the method according to the invention is characterized from that before or during the depression of the plastic inner part in the outer part an outer periphery of the further locking means by a pre-definable deformation of the Soil is reduced so far that this approximately in an inner diameter of the outer part corresponds to the smaller dimension and thus significantly reduced resistance can be fully inserted into the outer part. Due to the reduction the outer circumference or cross section of the latching means is the passage of the plastic inner part facilitated by the smallest inner dimension of the outer part and so a predeterminable Deformation achieved without any damage to the plastic inner part. by virtue of the pre-definable deformation of the soil mostly becomes a disadvantageous deformation and possible associated damage to the plastic inner part in this Area avoided.

Another advantageous procedure according to the method is achieved when the soil during the impression by a force acting on it in a predetermined manner elastic is bulged in the direction of a receiving space of the plastic inner part. These Predeterminable force can by means of a separate pressure stamp and / or by construction generates a negative pressure in the region of the receiving space of the plastic inner part become. In this case, also a predeterminable deformation of the plastic inner part in Area of the soil caused and so the outer circumference of the further locking means so far reduces the insertion or Eindrückvorgang turn without high effort or significantly reduced resistance can be performed.

Furthermore, it is advantageous if the outer part with its larger inner dimension after is held down in the receptacle and when the plastic inner and outer parts towards the bottom to taper conically and that the plastic inner part from below is introduced into the outer part. This allows a simple pre-positioning of the plastic inner part be performed on an insert and so even without a pre-positioning the plastic inner part in the outer part, the two parts snap together connected become.

A particularly preferred embodiment of the method according to the invention is characterized characterized in that when pressing the plastic inner part in the second station, the plastic inner part at the same time at its upper edge and in the area of the ground with an in Impact direction acting force is applied. This will cause undesirable deformation and wrinkling the plastic inner part safely avoided. A safe and error-free Locking results when, for locking plastic inner part and outer part on the plastic inner part in the region of the bottom a circumferential bead is provided and when the soil during the depression by the indenting force acting on it predetermined manner is elastically bulging outward.

Regardless, however, the object of the invention by a device thereby be solved, which is characterized by a receptacle for holding the outer part and a first station for latching impressions of the plastic inner part in the in the Recording held outer part. By recording the outer part is in a predetermined Position or position prepositioned held and the plastic inner part of it subsequently pressed in snapping. As a result, the combined packaging container becomes simple assembled into a single entity.

A preferred embodiment of the inventive device is characterized from that plastic inner part and outer part towards the ground too - so in the normal Operating position down to conically tapered, and that the recording comprises a retaining ring with a downwardly conically tapered inner contour, in which the outer part is held clamped.

Damage to the outer part can be safely avoided if the inner contour of the Retaining rings adapted in a lower portion of the conically tapered shape of the outer part is when the inner contour increases in diameter above the lower portion extended, and if the retaining ring of a dimensionally stable material with low sliding friction, in particular a plastic, preferably an acetal homopolymer (polyoxymethylene POM).

A particularly gentle handling of the parts results when the first station in a Eindrückrichtung slidably mounted Eindrücker includes, which for latching Pressing the plastic inner part in the outer part acting in Eindrückrichtung Force exerts on the plastic inner part, wherein the indentor is formed so that the when pressing a force on both the ground and on the upper edge of the plastic inner part exercises.

Has proved particularly useful when the indenter a flange-like upper part for placement on the upper edge of the plastic inner part and a subsequent Eindrückrichtung it Piston-like lower part for placing on the bottom of the plastic inner part includes, wherein the distance between the bottom of the top and the bottom of the Lower part of the indentor, preferably a few millimeters, in particular about 5 mm, larger is the distance between the upper edge and the bottom of the plastic inner part.

A further improved protection of the parts results from the fact that the impresser in the first station is moved by displaceable in Eindrückrichtung drive means, and that the drive means engage the pusher via a spring.

But it is also possible that the first station is preceded by a second station, in which loosely inserted the plastic inner part into the outer part held in the receptacle and if the second station comprises holding and transport means, which the plastic inner part releasably hold and by a transport or feeding device in the in the Transport pickup held outer part. It is particularly advantageous if the holding means comprise a suction cup, and that the transport means by means of a pneumatic cylinder movable in the insertion direction, held by the held in the receptacle outer part extend through extending linkage. This will separate one from the insertion station Assembly station or Eindrückstation created and so in a simple manner the plastic inner part is pressed independently of the outer part. By the separation in different and spatially separated workstations on the one hand, the number of cycles can be increased and on the other hand, a störungsunanfälligere final assembly be performed.

According to other embodiments, it is provided that the plastic part and the outer part are tapered towards the bottom to taper and that recording a Haltring with a conically tapering in the direction of the bottom inner contour comprises, wherein the taper seen in the vertical direction towards each other upward is done. Furthermore, it is advantageous if the inner contour of the retaining ring in a upper section of the conically tapered shape of the outer part is adjusted and that the inner contour Increased below the upper section in diameter increasingly. Thereby a recording is created in which the outer part is easy to use and due to the conically tapering inner contour a clear investment and thus positional fixation the outer part takes place relative to the recording.

According to another advantageous development is provided when the recording for mounting the outer part holding means are assigned, since so an unintentional release of the outer part secured by the recording is prevented.

It is also possible that the plastic inner part for insertion and / or impressions in the outer part is associated with an insertion, which in the receiving space of the Kunststoffmnenteils partially protruding and when the insert element in its cross section the inner dimensions of the plastic inner part is adjusted. This will on the one hand a exact positioning of the plastic inner part with respect to the outer part created in the axial direction. Furthermore, by the adaptation of the outer surface of the Einsetzelements the inner dimensions of the plastic inner part a good support and with appropriate Tolerance a full and tight system of the inner wall of the plastic inner part on Achieved insertion.

It is also possible if at least one suction line is arranged in the insertion element, which formed in the between the bottom of the plastic inner part and the insert Free space or gap opens and the suction line with a vacuum generator connected is. As a result, with a correspondingly built vacuum, a feeder or Arching the bottom portion of the plastic inner part in the direction of its receiving space be achieved, whereby the outer cross-sectional dimension of the locking means in the bottom area as far as can be reduced, so that an easy insertion and pushing of the Plastic inside part by the smallest diameter or dimension of the outer part is possible.

Finally, it is also possible that the suction line projects beyond the insert and up on reaches a predeterminable distance to the bottom of the plastic inner part, as so for the collection of the soil a predeterminable degree is easy to fix and by as Stop serving suction line on suction of the soil at the same addition one more Position fixation in the axial direction is possible.

(Further embodiments will be apparent from the dependent claims.) BRIEF EXPLANATION OF THE FIGURES

The invention will be described below with reference to embodiments in connection with the drawing will be explained in more detail.

Fig. 1

in einer stark vereinfachten Seitenansicht eine Ansaugstation zum losen Einsetzen des Kunststoffinnenteils in das in einer Aufnahme gehaltene Aussenteil gemäss einem bevorzugten Ausführungsbeispiel des Verfahrens nach der Erfindung;

Fig. 2

in verschiedenen Teilfiguren (Fig. 2a-c)verschiedene Ansichten eines Halterings für die Aufnahme gemäss Fig. 1;

Fig. 3

in einer stark vereinfachten Seitenansicht eine Montagestation zum einrastenden Eindrücken des Kunststoffinnenteils in das Aussenteil gemäss einem bevorzugten Ausführungsbeispiel des Verfahrens nach der Erfindung;

Fig. 4

eine Detailansicht vom Bodenbereich des Kombi-Verpackungsbehälters mit dem im Aussenteil eingerosteten Kunststoffinnenteil;

Fig. 5

in verschiedenen Teilfiguren (Fig. 5a-c) verschiedene Phasen des Eindrückvorgangs in der Montagestation nach Fig. 3;

Fig. 6

eine weitere mögliche Montagestation in Seitenansicht, teilweise geschnitten und vereinfachter schematischer Darstellung;

Fig. 7

den fertig montierten Kombi-Verpackungsbehälter nach Fig. 6 in Seitenansicht geschnitten und vereinfachter, schematisch vergrösserter Darstellung;

Fig. 8

eine andere mögliche Ausbildung der Montagestation nach Fig. 6 und 7, 6 in Seitenansicht geschnitten und vereinfachter, schematisch vergrösserter Darstellung.

Show it:

Fig. 1

in a highly simplified side view of a suction for loose insertion of the plastic inner part in the held in a receptacle outer part according to a preferred embodiment of the method according to the invention;

Fig. 2

in different sub-figures (Fig. 2a-c) different views of a retaining ring for the receptacle of FIG. 1;

Fig. 3

in a highly simplified side view of an assembly station for latching impressions of the plastic inner part in the outer part according to a preferred embodiment of the method according to the invention;

Fig. 4

a detailed view of the bottom portion of the combination packaging container with the rusted in the outer part plastic inner part;

Fig. 5

in different sub-figures (Figure 5a-c) different phases of the Eindrückvorgangs in the assembly station of Fig. 3;

Fig. 6

another possible assembly station in side view, partially cut and simplified schematic representation;

Fig. 7

cut the ready-assembled combi-packaging container of Figure 6 in side view and simplified, schematically enlarged view.

Fig. 8

another possible embodiment of the assembly station according to Fig. 6 and 7, 6 cut in side view and simplified, schematically enlarged representation.

WAYS FOR CARRYING OUT THE INVENTION

The inventive method is based on a combination packaging container, as in Applicant's earlier applications (see for example CH-A5-690 431 or WO-A1-98 / 13270) is described in detail. Such a combination packaging container, for example suitable for packaging yoghurt or other foods, is composed from a cup-shaped plastic inner part and a jacket-shaped outer part (e.g., cardboard) which are initially made separately and then formed to form the final container nested and latched together. This composite structure has the advantage that it saves plastic at the inner cup without loss of stability can be that the packaging after the consumption of the contents again separated and can be disposed of separately and that the outer part printed easily and high quality and can be stored to save space. Further details are the o.g. older registrations whose disclosure content is expressly part of the present application should be.

By way of introduction, it should be noted that in the differently described embodiments the same parts are provided with the same reference numerals or the same component designations, the disclosures contained in the entire description in analogy to the same parts with the same reference numerals or the same component designations transmitted can be. Also, the location information chosen in the description, such as above, below, laterally, etc. related to the immediately described and illustrated figure and should be transferred analogously to the new situation in the event of a change of position. Furthermore you can also individual features or combinations of features from those shown and described different embodiments of their own, inventive or inventive Represent solutions.

The latching connection between plastic inner part and cardboard outer part is at the conically tapered down parts achieved in that the outer part between designed as a sealing flange upper edge of the plastic inner part and a is held in the bottom region arranged bead. A pull-out above the bead creates a resilient bottom that provides a longitudinal force is safely introduced into the relatively stiff outer shell of cardboard over the bead.

To connect the two parts, namely plastic inner part 15 and outer part 14, is according to the invention the outer part 14 in a suitable receptacle (13 in Fig. 1, 3 or 5) held and the plastic inner part 15 in the held in the receptacle 13 outer part 14th introduced and then pressed into the outer part 14 latching. Essential part the receptacle 13 is a retaining ring 19 which in Fig. 2 in longitudinal section (Fig. 2a) and in the Top view from above (Fig. 2c) is shown. The retaining ring 19 consists of a dimensionally stable Material with low sliding friction, in particular a plastic, preferably a Acetal homopolymer (polyoxymethylene POM) as described e.g. from the company DuPont under the Brand name Delrin® is available. The retaining ring 19 has a special inner contour 20 in, which in a lower portion 21 (Fig. 2a, b) the outer part (14 in Fig. 2b) according to conically tapered (same inclination as outer part 14). This will be the outer part 14 - as shown in Fig. 2b - held in the retaining ring 19 clamped, without increase. It can therefore easily after connecting to the plastic inner part 15 again be lifted out of the retaining ring 19. Extended above the lower section 21 the inner contour 20 funnel-shaped with increasing diameter. hereby the insertion of the outer part 14 in the retaining ring 19 in the automatic and high Clock speed working insertion (10 in Fig. 1) facilitates and increased reliability. The retaining ring 19 should be at least 20 mm high to ensure a safe and stable Keep the outer part 14 to ensure. The inner diameter of the retaining ring 19 should be so be selected that the outer part 14 protrudes down at least 10 mm from the retaining ring 19, so that when pressing the plastic inner part 15 of the arranged in the bottom region Bead 29 is not damaged.

The introduction of the plastic inner part 15 in the held in the receptacle 13 outer part 14 takes place in the already mentioned insertion station 10, the strong in Fig. 1 in a side view is rendered simplified. In the insertion station 10 are by a laterally arranged first transport or feeding device 16 continuously outer parts 14 in associated Recordings 13 sitting fed. Accordingly, by a second arranged above Transport or feeding device 17 with the same clock rate plastic inner parts 15 supplied. In the insertion station 10, a holding and transfer device is fixedly installed, the comprises a rod 12 movable by means of a pneumatic cylinder 11 in the vertical direction, at the top of a suction cup 18 is arranged. Become several plastic inner parts 15 simultaneously used in associated outer parts 14, are accordingly several parallel working pneumatic cylinder and linkage arranged one behind the other.

To insert the plastic inner parts 15 are seated in the receptacles 13 outer parts 14 initially positioned in the insertion station 10, that their longitudinal axes with the Axle of the rod 12 substantially coincide. The rod 12 then moves - powered from the pneumatic cylinder 11 - with exposed suction cup 18 from below through the outer part 14 passes upwards, sucks a plastic inner part by means of the suction cup 18 15 at its bottom 32 and pulls the suction cup 18 adhering plastic inner part 15 down into the underlying outer part 14. Is the plastic inner part 15 is sufficient immersed far into the outer part 14, the suction cup 18 dissolves from the bottom 32 of the Plastic inner part 15, and the rod 12 moves down out of the outer part 14 out. The plastic inner part 15 is now sitting loosely in the outer part 14 and projects with a several millimeters long section out of the outer part 14, as in the lower part of Fig. 5a is shown. Another slipping of the plastic inner part 15 in the outer part 14 is prevents the outer diameter of the bead (29 in Fig. 5a) is greater than the smallest inner diameter of the outer part 14. After the outer part 14 with the loose used plastic inner part 15 from the axis of the linkage 12 further transported out has been and takes a new empty outer part 14 in its place, begins the above Inserting again.

The outer parts 14 held in the receptacles 13 loose with those in the insertion station 10 used plastic inner parts 15 are from the insertion station 10 to a downstream Assembly station 22 transports, as greatly simplified in Fig. 3 from the side is reproduced. In the assembly station 22, the plastic inner part 15 is on special Way latched pressed into the outer part 14 and so safe with the outer part 14 connected to the desired combination packaging container 28. For this, the plastic-finned part must 15 are pushed so far into the outer part 14 that the outer part 14 with the lower edge behind the ground-level bead 29 of the plastic inner part 15 engages, such as this is shown in Fig. 4 in the enlarged detail view.

For pressing the plastic inner part 15 is in the assembly station 22 a special Eindrücker 27 used in a frame 23 at the lower end of a vertical standing and slidably mounted guide rod 24 is arranged. The movement of the Impactor 27 is caused by a vertically displaceable, driven drive sleeve 26, which concentrically surrounds the guide rod 24 above the push-in 27 and acting on the push-button 27 via an intermediate spring 25.

The push-in 27 itself comprises a flange-like upper part 30 for placement on the upper Edge (sealing flange 34) of the plastic inner part 15 and in Eindrückrichtung it then piston-like lower part 31 for placing on the bottom 32 of the plastic inner part 15 (see also Fig. 5a and b). As a result, when pressing the plastic inner part 15 a force on both the bottom 32 and on the upper edge (sealing flange 34) of the plastic inner part 15 is exercised. A special feature lies in the fact that the distance L1 between the underside of the upper part 30 and the underside of the lower part 31 of the indentor 27 is greater than the distance L2 between the upper (sealing flange 34) and the Bottom 32 of the plastic inner part 15 (see Fig. 3). The difference between L1 and L2 is preferably a few millimeters. In practice, in particular about 5 have proved successful mm.

The difference between the lengths L1 and L2 ensures that when pushing in with the push-in 27 in the assembly station 22, first the lower part 31 on the floor 32 touches and this arched outwards or overpressed (Fig. 5b). Through the bulge (Overpressure) of the bottom 32 reduces at the same time the outer diameter of the bead 29, so that the plastic inner part 15 with significantly reduced resistance completely can be inserted into the outer part 14. This happens when at the next Shut down the indenter 27 of the bottom 32 by the difference (L1-L2) to the outside has curved and the indentor 27 with the flange-like upper part 30 on the sealing flange 34 of the plastic inner part 15 touches down. The plastic inner part 15 is so bulged with Bottom 32 is pressed into the end position shown in Fig. 5c, wherein the indenting forces simultaneously on the floor 32 and the sealing flange 34 are exercised. This prevents that deforms the relatively thin-walled plastic inner part 15 during the depression. The intermediate spring 25 causes excessive forces on the two parts 14 and 15 and also wrinkles on the two parts 14 and 15 are avoided.

If the plastic inner part 15 has reached the end position, the indentor 27 can be pulled out thereby be that the drive sleeve 26 moves upward and the guide rod 24 via a stop 33 entrains. The compressed spring 25 relaxes Then, the elastically bulged bottom 32 springs back and the bead 29 takes its original Outer diameter again, resulting in a locking of the two parts according to Fig. 4 leads.

The illustrated in Fig. 5 process of indentation, in which the bottom 32 of the plastic inner part 15 is over to a smooth nesting and snapping the two parts 14 and 15 ensure, but can also with advantage in the context of another Process management, which to a certain extent is a "kinematic reversal" of the process shown in Fig. 5 represents. In this case, the plastic inner part 15 is over slipped a corresponding mandrel and then pushed over the outer part 14, wherein the bottom 32 of the plastic inner part 15 is arched outwards. With advantage can This can be achieved by the dome with an extendable, arched base plate equipped, which pushes the bottom 32 to the outside. The outer part 14 is on the on pushed the cathedral sitting plastic inner part 15 and locked with this. The extendable Base plate on the dome ensures that the bottom 32 of the plastic inner part 15th is arched outward during the process and facilitates the connection process or made possible in the first place.

• Bei der Montage von Kunststoffinnenteil und Karton-Aussenteil wird zuerst der Boden des Kunststoffinnenteils überdrückt, damit der Wulst am Kunststoffinnenteil durch das Aussenteil gedrückt werden kann und es nicht verletzt;
• gleichzeitig drückt der Eindrücker auf den Siegelflansch des Kunststoffinnenteils; dadurch wird verhindert, dass sich das Kunststoffinnenteil während der Montage deformiert; die ganze Eindrückvorrichtung ist abgefedert,
• um Falten an Aussenteil und Kunststoffinnenteil zu vermeiden.

Overall, the invention provides a method and an apparatus for producing a combination packaging container, which are characterized by the following characteristic features:

• When assembling the plastic inner part and the cardboard outer part, the bottom of the plastic inner part is first pressed, so that the bead on the plastic inner part can be pressed through the outer part and does not injure it;
• at the same time the indenter presses on the sealing flange of the plastic inner part; This prevents the plastic inner part from deforming during assembly. the whole push-in device is cushioned,
• to avoid wrinkles on the outer part and the inner plastic part.

Of course, it is also possible, the previously described joining process of Plastic inner part 15 with the outer part 14 in any other axis alignment as in the vertical arrangement shown and described here to each other perform. In the apparatus shown in FIGS. 1 to 5 and described therein Procedure is always the plastic inner part 15 positioned in its later position of use or aligned, wherein the bottom 32 always at the lowest area of the combination packaging container 28 forms.

As already described above, according to the invention, the outer part 14 in a suitable Received receiving 13 and the plastic inner part 15 held in the receptacle 13 in the Inserted outside part 14 and then pressed into the outer part latching. In this case, both the pre-positioning of the plastic inner part 15 within the outer part 14 as well as the subsequent impressing process or mounting process of the Plastic inner part 15 are carried out on the outer part 14 in a single station as also in the aforementioned divided assembly plant, namely the insertion station 10 and the assembly station 22. This depends on the selected procedure and the achievable Number of cycles for final assembly. Of course it is also possible, in the context the unseparated insertion and assembly station several of them simultaneously next to each other or operate in parallel to achieve an increased output power.

FIGS. 6 and 7 show a further possible and, if appropriate, separate invention Solution for combining the two prefabricated components, namely the Plastic inner part 15 and the outer part 14, in turn, same for the same parts Reference numerals or component designations as used in the preceding FIGS. 1 to 5 become. In order to avoid unnecessary repetition, the detailed description the preceding Figs. 1 to 5, respectively, reference is made. Further is Simplified here shown that both the pre-positioning of the plastic inner part 15 in the outer part 14 as well as the final assembly - so the complete impressions in the outer part 14 is performed in a single assembly station. But it is independent of that also possible, as already mentioned in the description of FIGS. 1 to 5, the final assembly station to precede a further Vorpositionierungsstation, in which the plastic inner part 15 inserted into the outer part 14 and in the not yet locked position of the Station for latching impressions is supplied. On a representation of appropriate Facilities were omitted because of the sake of clarity.

In contrast to the previously described and shown embodiments here is the outer part 14 again held in its own recording 13, but the former already described, but having a frusto-conical outer shell Outer part 14 arranged with its smaller dimension 35 seen in the vertical direction above and with its larger lower dimension 36 down in the receptacle 13 is held.

In contrast to the procedure described above and the simplified Assembly plant, in which the outer part 14 due to geometric reasons in the receptacle 13 the different smaller and larger dimensions 35, 36 by itself without any Aids held in the receptacle 13 are here due to the exact opposite arranged outside part 14 - this of course also applies to the training the receptacle 13 - optionally additional and not shown here holding means required with which the outer part 14 are supported relative to the receptacle 13 can. These holding means can, for example, vacuum slots, suction cups, mechanical Be stops or the like.

The plastic inner part 15 is also shown in FIG. 6 in a position or position at which the bottom 32 seen in the vertical direction, the highest area of the Plastic inner part 15 represents, that is arranged at the top. Simplified in this case Procedure for the assembly are both the plastic inner part 15 and the Outer part 14 in the direction of the bottom 32 to taper conically, wherein the Plastic inner part 15 viewed in the vertical direction from below into that in the receptacle 13th held outer part 14 is introduced.

The plastic inner part 15 has for latching or holding on held in the receptacle 13 Outer part 14 locking means 37, 38, wherein in this embodiment, the first Locking means 37 in the region of an open end face 39 of the plastic inner part 15 and the further locking means 38 is arranged or provided in the region of the bottom 32. It can, As already known, the first locking means 37 may be formed by the sealing flange 34. The further latching means 38 in the region of the bottom 32 can by at least one at least partially formed over the circumference of the plastic inner part 15 extending bead 29 be, which also provided circumferentially over the entire circumference of the plastic inner part can be. If the further locking means 38 or the bead 29 only partially over arranged the circumference of the plastic inner part 15, for example, during a Temperature change or a rapidly occurring temperature difference between the outer part 14 and the plastic inner part 15 condensate formed in this area unhindered drain or seat, resulting in a longer life without adverse effect exists for the outer part 14.

As already can be seen from the preceding description, the outer part 14 held in the receptacle 13 and the plastic inner part 15 at approximately the same Axis alignment introduced or introduced and then the plastic inner part 15th via the locking means 37, 38 united with the outer part 14 to the combined packaging container 28. In addition, it is also possible that at the same time during the insertion movement the plastic inner part 15 in the held in the receptacle 13 outer part 14, the outer part 14 in the direction of movement of the plastic inner part 15 opposite direction is moved relative to the plastic inner part 15. By this combined movement is for final assembly, do not move the plastic inner part 15 over the entire adjustment path, but due to the combined and opposite movement of the outer part 14 towards the plastic inner part 15 a shortening or division of this movement distance achievable, whereby with each absolute lower speed of movement, the necessary Adjustment paths can be covered in the same time. This extra movement the outer part 14 toward the plastic inner part 15 but is understood also in connection with the insertion station 10 previously described in FIGS. 1 to 5 with the assembly station 22 both in the course of the separate assembly as well as the united Insertion and assembly station possible.

In this simplified procedure shown here in FIG. 6, the plastic inner part is 15 assigned a simplified illustrated insertion element 40, which in the area its outer shell has an outer angle 41, which almost exactly an inner Cone angle 42 of the plastic inner part 15 corresponds. Likewise, it is also a cross section or diameter of the insertion element 40 to the inner dimensions of the plastic inner part 1, in particular in the region of the open end face 39 up to the end of the Inserting element 40, adapted so that the insertion element 40 far into the plastic inner part 15 can be introduced or introduced until the sealing flange 34 of the plastic inner part 15 at a arranged on the insertion element 40 support member 43 to the plant comes. At the same time but then there is also the relatively thin wall of the plastic inner part 15 on the insertion element 40, as best seen in FIG. 7 can be seen. Likewise is still in Fig. 7, the complete latching of the plastic inner part 15 on the outer part 14, in which the insertion element 40 is still completely in through the plastic inner part 15 formed receiving space 44 is located.

Simplified, it can be seen from a synopsis of FIGS. 6 and 7 that within the insertion element 40 at least one suction line 45 is arranged, which opens into the free space or intermediate space formed between the bottom 32 of the plastic inner part 15 and the insertion element 40. For this purpose, a measured in the direction of the longitudinal axis length or height H _{K of} the plastic inner part 15 between the bottom 32 and the open end face 39 is greater a length or height H _{E of} the insert 40. Due to the above-mentioned modest difference or vote of the insertion 40th With respect to the plastic inner part 15 can be constructed via the suction line 45 due to the above-described height or length difference between the plastic inner part 15 and the insert 40, a negative pressure. Thus, the insertion element 40 projects from the sealing edge 34 only partially towards the bottom 32. This can be a reduction of the outer circumference of the locking means 38 are effected so as to the final locking and pushing through the plastic inner part 15 in the region of the other locking means 38 through to be able to perform the smaller minor dimension 35 of the outer part 14.

This is achieved in the Figs. 1 to 5 described above in that the bottom 32 during the impressions by acting on him Eindrückkraft in a predetermined manner elastically outwardly bulging, that is, on the side facing away from the receiving space 44, deformed becomes. This reduction of the outer circumference or the outer dimension or Cross-section of the further locking means 38 is characterized by a pre-definable deformation of the Plastic inner part 15 in the region of its bottom 32 to perform so far that the outer Circumference or the outer dimension or cross section in about an inner diameter 46th of the outer part 14 in the region of its smaller dimension 35 corresponds.

In the embodiment shown here in Figs. 6 and 7 is in contrast to the previously described Fig. 1 to 5 of the bottom 32 is not facing away from the receiving space 44 Side, but by a force acting on it in a predetermined manner elastically in the direction the receiving space 44 of the plastic inner part bulged. This invading and the associated reduction in the cross-sectional dimension or circumference of the other Locking means 38, for example, due to the vacuum build-up via the suction line 45 and not shown here vacuum generator, such as vacuum pumps, respectively. Regardless, however, it is also possible, by means of this force acting on him a separate plunger 47 to produce, which simplified in Fig. 7 schematically is shown. In this case, the application of the force either only by the structure the negative pressure via the suction line 45 or only by the plunger 47 alone, but also by any combination of these two previously described procedures be achieved.

If, for example, the plastic inner part 15 is formed from a relatively thin-walled component, the application of the deformation force on the floor 32 exclusively on take place in the receiving space 44 built vacuum. Are stronger wall parts of the Plastic inner part 15 to deform, this can either only by the or the plunger 47 alone or in order to better position fixation of the plastic inner part 15 am Insertion element 40 to achieve a combined application.

In FIG. 8, as in FIG. 7, the suction line 45 is shown in simplified form, which however, it reaches 32 close to the ground. As a result, depending on the selected distance between the end of the suction pipe 45 and the bottom 32 a predefined deformation of the same be determined. In this case, this distance between a few millimeters, e.g. 2 to 6 mm, down to the centimeter range, e.g. 1.0 to 1.5 cm or more. At the Construction of the negative pressure, the entire receiving space 44 is first sucked off and at corresponding Deformation of the bottom 32 of this towards the suction line 45 moves and sucked on this and so kept fixed in this position. The suction line 45 forms while the shape of a suction cup. As a result, the above-described reduction of outer circumference or cross section of the further locking means 38 in cooperation with achieved the bottom 32 and the latching operation of the further locking means 38 described above behind the edge of the outer part 14 in the region of its smaller dimension 35 can so be performed. This in turn fixes the position of the outer part 14 between achieved the two locking means 37, 38.

Furthermore, here in the direction of the receiving space 44 vaulted bottom 32 is simplified in dashed lines shown, with an additional attempt was made in the case of a round trained plastic inner part 15 associated diameter reduction of another locking means 38 - in the present case of the bead 29 - to show.

It should be mentioned at this point that the inward curving of the floor 32 described here in FIG Direction of the receiving space 44 but of course also in the previously in Figs. 1 to 5 plants described application and the orientation of the outer part 14 and plastic inner part 15 corresponds to those in the usual position of use. Likewise but also the arrangement and orientation of the outer part 14 and plastic inner part 15th be turned by 180 ° according to FIGS. 6 to 8 - thus correspond to the usual position of use.

To a detachment or unwanted swelling of mostly made of a recycled cardboard To avoid the outer part 14 of the plastic inner part 15, it may be advantageous prove, when at the plastic inner part 15 facing side of the outer part 14th arranged at least partially a moisture-absorbing or -bindende layer which may be formed by a hydrogel or the like, for example. These hydrogels But also serves to make possible condensation or condensation an occurring temperature difference between the stocked in the receiving space 44 and bottled medium, such as yogurt, etc., and to absorb the external environment or to bind, without any adverse effect on the material of the outer part 14th is possible. By the moisture absorption can cause swelling of the cardboard material be, whereby the position fixing between the two locking means 37, 38 is no longer completely given and an unwanted detachment of the outer part 14 of the plastic inner part 15 takes place. At the same time associated with this detachment is also a reduction the support function of the outer part 14 for the plastic inner part 15, the so partially or but also completely lost.

For the sake of order, it should be pointed out that for a better understanding of the Construction of the combination packaging container of this or its components partly unmassstäblich and / or enlarged and / or reduced in size.

The task underlying the independent inventive solutions can the description be removed.

Above all, the individual in Figs. 1; 2; 3, 4; 5; 6, 7; 8 shown embodiments Form the subject of independent solutions according to the invention. The related, Tasks and solutions according to the invention are the detailed descriptions of these figures refer to.

REFERENCE NUMBERS

1 2 3 4 5 6 7 8th 9 10

insertion station

11

pneumatic cylinder

12

linkage

13

admission

14

outer part

15

Plastic insert

16

Transport or feeding device

17

Transport or feeding device

18

suction cup

19

retaining ring

20

inner contour

21

lower section

22

assembly station

23

frame

24

guide rod

25

feather

26

drive sleeve

27

monopusher

28

Combined packaging containers

29

bead

30

top

31

lower part

32

ground

33

attack

34

sealing flange

L1

distance

L2

distance

35

smaller dimension

36

larger dimension

37

latching means

38

latching means

39

front

40

inserter

41

external angle

42

cone angle

43

support element

44

accommodation space

45

suction

46

Inner diameter

47

tamp pad

Claims (40)

1. Method of producing a combination packaging container (28), which combination packaging container (28) comprises a beaker-shaped plastic inner part (15) and a casing-type outer part (14) surrounding the plastic inner part (15) and retained on the external face of the plastic inner part (15) in an interlocking arrangement, by which method the two parts (14, 15) are pushed one inside the other in an interlocking arrangement, characterised in that the outer part (14) is retained in a holder (13), and the plastic inner part (15) is introduced into the outer part (14) retained in the holder (13) and then pushed down into the outer part (14) so as to interlock.
2. Method as claimed in claim 1, characterised in that the plastic inner part (15) is loosely inserted in the outer part (14) retained in the holder (13) at a first station (10) and the loosely inserted plastic inner part (15) is pushed into and interlocked with the outer part (14) at a second station (22).
3. Method as claimed in claim 1, characterised in that the motion of pushing the plastic inner part (15) into the outer part (14) takes place at the same station at that at which the motion to insert the plastic inner part (15) in the outer part (14) takes place.
4. Method as claimed in one of the preceding claims characterised in that, simultaneously with the motion by which the plastic inner part (15) is inserted in the outer part (14) retained in the holder (13), the outer part (14) is displaced towards the plastic inner part (15) in the opposite direction relative to the direction of motion of the plastic inner part (15).
5. Method as claimed in one of the preceding claims, characterised in that the plastic inner part (15) and outer part (14) are conical, tapering towards the bottom, and the plastic inner part (15) is inserted in the outer part (14) from above.
6. Method as claimed in one of the preceding claims, characterised in that the plastic inner part (15) has an essentially flat base (32) and the plastic inner part (15) is loosely inserted in the outer part (14) and retained by the base (32).
7. Method as claimed in claim 6, characterised in that the plastic inner part (15) is releasably retained by means of a holding mechanism (11, 12, 18), extending through the outer part (14) from underneath, by the external face of the base (32) and is pulled into the outer part (14).
8. Method as claimed in claim 7, characterised in that the holding mechanism (11, 12, 18) releasably retains the plastic inner part (15) by means of a suction cup (18).
9. Method as claimed in one of the preceding claims, characterised in that when the plastic inner part (15) is pushed in at the second station (22), a force is simultaneously applied to the plastic inner part (15) in the pushing-in direction at its top lip (34) and in the region of the base (32).
10. Method as claimed in one of the preceding claims, characterised in that catch means (37, 38) are provided on the plastic inner part (15) in order to retain or interlock the plastic inner part (15) and outer part (14).
11. Method as claimed in claim 10, characterised in that a first catch means (37) in the region of an open end face (39) of the plastic inner part (15) is provided by the sealing lip (34).
12. Method as claimed in claim 10 or 11, characterised in that another catch means (38) is provided in the region of the base (32) by means of a bead (29) extending at least in certain regions around the circumference of the plastic inner part (15).
13. Method as claimed in claim 12, characterised in that the bead (29) extends continuously around the circumference of the plastic inner part (15).
14. Method as claimed in one of the preceding claims, characterised in that before and during the process of pushing the plastic inner part (15) into the outer part (14), an external periphery of the other catch means (38) is reduced by means of a predefinable deformation of the base (32) to the degree that it corresponds more or less to an internal diameter (46) of the outer part (14) in the region of the smaller dimension (35) and can therefore be pushed completely into the outer part (14) whilst meeting a significantly reduced amount of resistance.
15. Method as claimed in one of the preceding claims, characterised in that the base (32) resiliently collapses outwards due to the pushing force acting on it during the pushing-in process.
16. Method as claimed in one of claims 1 to 14, characterised in that the base (32) resiliently collapses inwards in a predefined manner towards an interior (44) of the plastic inner part (15) due to a force acting on it during the pushing-in process.
17. Method as claimed in claim 16, characterised in that the force acting on it is generated by a separate thrust die (47).
18. Method as claimed in claim 16 or 17, characterised in that the force acting on it is produced by generating a vacuum pressure in the region of the interior (44) of the plastic inner part (15).
19. Method as claimed in one of claims 1 to 4, 6, 9 to 18, characterised in that the outer part (14) is retained in the holder (13) with its bigger internal dimension (36) disposed at the bottom.
20. Method as claimed in claim 19, characterised in that the plastic inner part (15) and outer part (14) are conical, tapering in the direction towards the base (32), and the plastic inner part (15) is inserted in the outer part (14) from underneath.
21. System for producing a combination packaging container by the method as claimed in claim 1, characterised by a holder (13) for retaining the outer part (14) and a first station (22) for inserting and interlocking the plastic inner part (15) in the outer part retained in the holder (13).
22. System as claimed in claim 21, characterised in that the plastic inner part (15) and outer part (14) are of a conical design, tapering towards the bottom, and the holder (13) has a retaining ring (19) with a conical internal contour (20) tapering towards the bottom, in which the outer part (14) is held clamped.
23. System as claimed in claim 22, characterised in that a bottom section (21) of the internal contour (20) of the retaining ring (19) matches the conically tapered shape of the outer part (14) and the diameter of the internal contour (20) above the bottom section (21) becomes increasingly wide.
24. System as claimed in one of claims 22 or 23, characterised in that the retaining ring (19) is made from a dimensionally stable material with a low sliding friction, in particular a plastic, preferably an acetal homopolymer (polyoxymethylene POM).
25. System as claimed in one of claims 21 to 24, characterised in that the first station (22) has a ram (27) mounted so as to slide in the pushing-in direction, which applies a force acting in the pushing-in direction onto the plastic inner part (15) in order to push in and interlock the plastic inner part (15) in the outer part (14).
26. System as claimed in claim 25, characterised in that the ram (27) is designed so that during the pushing-in process, a force is applied both to the base (32) and to the top lip (34) of the plastic inner part (15).
27. System as claimed in claim 25 or 26, characterised in that the ram (27) has a flange-type top part (30) which is placed on the top lip (34) of the plastic inner part (15) and is adjoined in the pushing-in direction by a plunger-type bottom part (31) which is placed on the base (32) of the plastic inner part (15).
28. System as claimed in claim 27, characterised in that the distance (L1) between the bottom face of the top part (30) and the bottom face of the bottom part (31) of the ram (27) is preferably a few millimetres bigger, in particular approximately 5 mm bigger, than the distance (L2) between the top lip (34) and the base (32) of the plastic inner part (15).
29. System as claimed in one of claims 25 to 28, characterised in that the ram (27) in the first station (22) is moved in the pushing-in direction by means of a displaceable drive means (26) and the drive means (26) engages with the ram (27) via a spring (25).
30. System as claimed in one of claims 21 to 29, characterised in that a second station (10) is connected downstream of the first station (22), at which the plastic inner part (15) is loosely inserted in the outer part (14) retained in the holder (13).
31. System as claimed in claim 30, characterised in that the second station (10) has holding and conveying means (18; 11, 12), which releasably hold the plastic inner part (15) whilst the outer part (14) retained in the holder (13) is conveyed by a transport and conveyor mechanism (17).
32. System as claimed in claim 31, characterised in that the holding means has a suction cup (18) and the transport means have a rod system (12) which extends through the outer part (14) retained in the holder (13) and is displaceable in the pushing-in direction by means of a pneumatic cylinder.
33. System as claimed in one of claims 21, 24 or 30, characterised in that the plastic inner part (15) and the outer part (14) are conical, tapering towards the base (32), and the holder (13) has a retaining ring (19) with a conical internal contour (20) tapering towards the base (32), the taper as viewed in the vertical direction converging at the top.
34. System as claimed in claim 33, characterised in that a top portion (21) of the internal contour (20) of the retaining ring (19) matches the conically tapered shape of the outer part (14) and the diameter of the internal contour (20) below the top section (21) becomes increasingly wide.
35. System as claimed in one of claims 21, 24, 30, 33 or 34, characterised in that the holder (13) for retaining the outer part (14) is provided with retaining means.
36. System as claimed in one of claims 21, 24, 30, 33 bis 35, characterised in that the plastic inner part (15) is provided with an inserting element (40) for inserting and/or pushing in the outer part (14), which partially projects into the interior (44) of the plastic inner part (15).
37. System as claimed in claim 36, characterised in that the cross section of the inserting element (40) matches the internal dimensions of the plastic inner part (15).
38. System as claimed in claim 36 or 37, characterised in that at least one suction line (45) is provided in the inserting element (40), which opens into the free space or intermediate space left between the base (32) of the plastic inner part (15) and the inserting element (40).
39. System as claimed in claim 38 , characterised in that the suction line (45) is connected to a vacuum generator.
40. System as claimed in claim 38 or 39, characterised in that the suction line (45) projects beyond the inserting element (40) and extends to a predefinable distance short of the base (32) of the plastic inner part (15).

Images