DE9215136U1 - Plant for producing molded bodies from a deformable film material or the like. - Google Patents

Description

TELEF0N:0711/7800995 TELEFAX: 0711 /7800995 TELEX: 177H1040pasb TELETEX:

KÖHLER SCHMID + PARTNER

PATENT ATTORNEYS

KÖHLER SCHMID + P. RUPPMANNSTR. 27 D-7000 STUTTGART 80

19 673 Co/nu

LMG ROTOPACK GmbH Ulmer Strasse 184-188 7000 Stuttgart 1

Plant for the production of molded bodies from a deformable film material or dal.

The present invention relates to a system for producing molded bodies for receiving and packaging objects, having recesses or the like, from a deformable film material or the like.

These molded bodies are in particular inserts suitable for chocolate packages or the like for receiving and storing the individual chocolates in the bowl-like recesses in these inserts. These inserts are manufactured in particular by shaping a plastic oil ie .

which can be done either gradually or continuously. These plastic inserts have proven themselves in practice, but for environmental reasons we are now trying to avoid using such plastic in this application as much as possible and to use an environmentally friendly material. However, this plan presupposes that the foil material in question can actually be formed safely and, especially in large quantities, quickly enough. If the foil material in question has a limited stretching capacity, it is important to ensure that a sufficient amount of material is available for each forming process.

The object of this invention is therefore to create a system that meets these requirements and, above all, enables safe and rapid deformation of environmentally friendly and recyclable film materials.

This object is achieved according to the invention by a device which has the following features:

1. a film unwinding and feeding device,

2. a device for incorporating folds into the fed film

3. any humidification device,

4. a deformation device,

5. any drying facility,

6. a cutting device and

7. a device for winding up the remaining film material.

As far as the film material is concerned, this is made of environmentally friendly, possibly multi-layered glassine, linen fabric laminated with paper and/or glassine, or paper laminated with glassine. The linen fabric and/or paper can then also be laminated on both sides.

The device for working the longitudinal or transverse folds into the film can have at least two interacting rollers or the like, in one of whose casings preferably similar longitudinal or annular grooves are worked in at equal distances from one another and on the other casing longitudinal or annular ribs are arranged at equal distances from one another and engage in the previously mentioned longitudinal and annular grooves. The deformation of the intended film material can be further supported by moistening this film material after the previously discussed working in of the longitudinal or transverse folds and drying it again after deformation. It is also advantageous if the desired shaped bodies are punched out of the already deformed film material and the remaining film material is wound up on a core or the like.

It is also advantageous if this device is equipped with several rear-mounted, one behind the other,

is equipped with pairs of rollers having longitudinal or annular grooves or longitudinal or annular ribs, of which only one pair of rollers machines a single longitudinal groove or transverse groove into the film material in question.

If this is a device that works the longitudinal folds into the film, then similar annular grooves or annular notches are expediently worked into the casing of one roller at axial distances from one another and corresponding annular ribs that engage in the annular grooves or annular notches are formed into the casing of the other roller at the same axial distances from one another.

In an advantageous device which works the transverse folds into the film, however, similar axially directed longitudinal grooves or notches are worked into the casing of one roller at intervals from one another in the circumferential direction, and longitudinal ribs which correspond to the casing of the other roller and engage in these longitudinal grooves or notches are formed at the same intervals from one another.

As far as a step-by-step embodiment of the deformation device is concerned, this expediently consists of a die lower plate that can be raised into its working position and an upper plate that can be lowered into its working position, on the underside of which the punch engaging in the die, itself designed as a male die, and a spring-loaded hold-down device are arranged.

In another embodiment of the forming device that allows continuous production, it consists of a lower roller and an upper roller that interacts with it, whereby recesses corresponding to the recesses to be made in the molded body to be manufactured are formed in the casing of one roller in the circumferential direction, preferably at equal distances from one another, and projections or the like are formed on the casing of the other roller, opposite these recesses and corresponding to them, and engage snugly into these recesses.

The deformation device can also optionally consist of a lower plate that is forced back and forth and an upper roller that interacts with it, whereby recesses corresponding to the recesses to be made in the molded body to be produced are formed in the upper side of the lower plate, preferably at equal distances from one another as seen in its feed direction, and projections are formed on the jacket of the upper roller that are opposite these recesses and correspond to them and fit snugly into these recesses. In this context, it is also advantageous if the recesses in the lower plate are assigned bushings of different designs that can be inserted into them and are easily exchanged.

If there are several rows of equal or unequal distances between each other on the plates and/or the roller casings transverse to the feed direction on the plates or the roller circumferences

If recesses are molded in or projections are molded onto the mold, it is also possible to produce molded bodies with recesses worked into them in rows and next to each other. If necessary, each row can also have recesses or projections of different sizes, which is particularly advantageous for chocolate packages, as such packages often have to accommodate very different chocolates, each with different dimensions.

As far as the recesses in one plate or one roller are concerned, these can be spherical, cylindrical or even cup-like or trough-like, whereby the projections formed opposite one another on the other plate or the casing of the other roller correspond to these recesses.

Further details of the present invention emerge from the following description of a system consisting, for example, of several devices, as well as the claims that follow therefrom.

Show it:

Fig. 1 is a schematic side view of the system,

Fig. 2 a plan view of this system,

Fig. 3 is a side view of the device which forms the folds in the film material,

Fig. 4 a front view in the direction of arrow A,

Fig. 5 partially sectioned side views of a first and 6 embodiment of the deformation device,

Fig. 7 shows the schematic and sectional representation of a second embodiment of the deformation device,

Fig. 8 is a partial longitudinal section along the line 8-8,

Fig. 9 is a partially sectioned front view of the embodiment shown in Figures 7 and 8

and

Fig. 10 a variant of the deformation device shown in Figure 9

The system 1 shown in Figures 1 and 2 has an unwinding device 2, onto the core 3 of which a film 4, for example made of multilayer glassine or the like, is wound and guided through the system 1 in the direction of arrow 5.

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Viewed in the feed direction 5, a device 8 consisting of two rollers 6 and 7 is arranged behind the unwinding device 2, by means of which a plurality of longitudinal folds 9 running parallel to one another and having a V-shaped cross-section are to be introduced into the film 4, in particular in the manner shown in Figure 2. For this purpose, three annular notches 11, for example, are incorporated into the casing 10 of the upper roller 6 at equal distances a from one another, into which associated annular ribs 13, formed on the casing 12 of the lower roller 7 and each having the same cross-section as the annular notches 11, engage tightly.

In order to subsequently be able to deform the now longitudinally folded film 4, it is necessary to moisten this film 4, for which purpose a moistening device 14 is provided which is arranged behind the device B and is only shown schematically.

A deformation device 15 is provided for deforming the film 4, which is shown again in Figures 5 to 7. This device 15 has a matrix lower plate 16 that can be raised from its lowered rest position to a working position, in which cylindrical recesses 17 that are open at the top are machined in rows next to and behind each other. Above this lower plate 16 there is an upper plate 18 that interacts with it and can be lowered from a raised rest position to its working position, on the underside 19 of which there is a stamp 20 that serves as a male mold and also a hold-down device 22 that is under the action of springs 21 and that grips the stamp 20 in a frame-like manner, fixing the film 4 during deformation.

- 9 -arranged.

On the front side 23 of this stamp 20, projections 24 are arranged in the same way in rows and in the shape of hemispheres, corresponding to the cylindrical recesses 17 in the lower plate 16. In the lowered working position of the stamp 20, these projections 24 engage snugly in the recesses 17 of the raised lower plate 16, whereby the intended deformation of the film 4 passed between the lower plate 16 and the upper plate 18 then takes place. At the same time as the upper plate 18 carrying the stamp 20 is lowered, the frame-shaped hold-down device 22 is also lowered onto the edge 25 of the film section 26 to be deformed, thus fixing the latter during the deformation process.

The three other figures 7, 8 and 9 show schematically another deformation device 27, which has two working rollers 29 and 30 that interact with one another and rotate continuously about their axes 28. In this case, spherical, dome-like recesses 32 are worked into the casing 31 of the lower roller 29, each offset by 90° to one another and likewise in rows next to one another, to which corresponding approximately hemispherical projections 34 are assigned, formed in the same way on the casing 33 of the upper roller 30, which continuously and successively engage fully in the recess 32 directly opposite them and bring about the intended deformation of the film 4. The areas of the film 4 adjacent to the recesses 32 are fixed by the two rollers 29 and 30. Furthermore, in the feed

As seen in the direction 5, two more rollers 35 and 36 are arranged in front of these two working rollers 29 and 30, which ensure a safe feeding of the film 4 to be deformed.

Finally, as far as Figure 10 is concerned, this shows a variant of the previously discussed deformation device 27. In this case, instead of a lower roller 29, a slide 38 is provided which slides back and forth on two guide rods designated 37 and is equipped with a toothed rack 39 which serves to guide it and into which a gear 41 arranged on the shaft 40 of the upper roller 30 engages. In this slide 38, cylindrical recesses 42 are also machined corresponding to the arrangement of the projections 34 formed on the upper roller 30, into which the corresponding, also cylindrical, bushings 43 are inserted and fixed by means of screws 45 which pass through bores 44. This design has the particular advantage that the bushings 43 can easily be exchanged for bushings of a different shape.

If necessary, the entire slide 38 can be replaced with another slide with differently shaped recesses and bushings.

Viewed in the feed direction 5, behind the deformation device 15 there is a drying device 46 and a cutting device designated 47. Following this there is then a stacking station 48 and a winding device 49.

The mode of operation of this Annex 1 is as follows:

As soon as the film 4 pulled forward in the direction of arrow 5 is gripped by the two rollers 6 and 7 of the longitudinal folding device 8, these two rollers 6 and 7 deform the film 4, whereby the longitudinal folds designated 9 are formed in it at a distance a and at the same time the original film width b is reduced to the dimension c.

After moistening the film 4, which now has the longitudinal folds 9 and thus also a material reserve, it is deformed in the following device 15 in the intended manner, whereby the hemispherical cups designated 50 in Figures 6 to 8 are introduced into the film 4. The material reserve formed by these longitudinal folds 9 ensures safe and perfect deformation. The frame-shaped hold-down device 22, which is lowered into its working position together with the upper plate 18 of the device 15, simultaneously fixes the edge 25 of the relevant film section 26, so that there is no risk of this film section 26 tearing out.

As soon as this deformation process is completed, the lower plate 16 and the upper plate 18 return to their rest positions and release the film 4 so that it can now be advanced a further step to the drying device 46.

After the advanced film sections 26 have dried, they reach the following cutting device 47, whose frame knife 51 punches the now finished molded body 52 out of the film 4 so that it can then be stacked in the station 48. The remaining film 53 is then wound onto the core 54 of the device arranged at the end of the system 1.

Claims (13)

19 673 Co/nu claims 1. Plant for the production of molded bodies for receiving and packaging objects, having recesses or the like, made of a deformable film material or the like, characterized by 1. a film unwinding and feeding device (2) 2. a device (8) for incorporating folds (9) into the fed film (4), 3. a deformation device (15, 27), 4. a cutting device (47) and 5. a device (49) for winding up the remaining film material (53). 2. Device according to claim 1, characterized in that a humidifying device (14) is arranged in front of the deformation device (15, 27) and a drying device (46) is arranged behind the deformation device (15, 27). 3. Device according to claim 1, characterized in that the the device (8) which forms longitudinal or transverse folds (9) in the film (4) has at least two rollers (6, 7) or the like which interact with one another, in one casing (10) of which preferably similar longitudinal or annular grooves (11) are formed at equal distances (a) from one another and on the other casing (12) of which longitudinal or annular ribs (13) are arranged at equal distances (a) from one another and engage in the aforementioned longitudinal and annular grooves (11). 4. Device according to claim 3, characterized in that it (1) is equipped with several pairs of rollers (6, 7) arranged one behind the other in the feed direction (5) and having longitudinal or annular grooves (11) or longitudinal or annular ribs (13). 5. Device according to claim 1 ₁ , characterized in that in the casing (10) of one roller (6) of the device (8) which works the longitudinal folds (9) into the film (4), identical annular grooves or annular notches (11) are machined at axial distances (a) from one another, and on the casing (12) of the other roller (7) associated annular ribs (13) engaging in the annular grooves or annular notches (11) are formed at the same axial distances (a) from one another. 6. Device according to claim I ₁ , characterized in that in the casing (10) of one roller (6) of the device (8) which works the transverse folds into the film (4), similar axially directed longitudinal grooves or longitudinal notches are worked at intervals from one another in the circumferential direction and are provided on the casing (12). -"15 - ' the other roller (7) has longitudinal ribs formed at equal distances from one another into which these longitudinal grooves or longitudinal notches engage. 7. Device according to claim 1, characterized in that the deformation device (15) consists of a die lower plate (16) which can be raised into its working position and an upper plate (18) which can be lowered into its working position, on the underside of which (19) the punch (20) which engages in the die and is itself designed as a male die and a hold-down device (22) which is subject to spring action (21) are arranged. 8. Device according to claim 1, characterized in that the deformation device (27) consists of a lower roller (29) and an upper roller (30) cooperating with the latter, whereby in the casing (31) of one roller (29) seen in the circumferential direction recesses (32) corresponding to the recesses (50) to be machined into the molded body (52) to be produced are formed at preferably equal distances from one another and on the casing (33) of the other roller (30) projections (34) or the like are formed which are opposite these recesses (32) and correspond to them and engage snugly in these recesses (32). 9. Device according to claim 1, characterized in that the deformation device (27) consists of a forcibly reciprocated lower plate (38) and an upper roller (30) cooperating with the latter, wherein in the upper side of the lower plate (38) seen in its feed direction in preferably equal Recesses (42) corresponding to the recesses (50) to be made in the molded body (52) to be manufactured are formed at intervals from one another, and projections (34) opposite and corresponding to these recesses (32) and engaging snugly into these recesses (32) are formed on the casing (33) of the upper roller (30). 10. Device according to claim 9, characterized in that the recesses (42) in the base plate (38) are assigned bushings (43) of different design which can be inserted into the same and are easily exchangeable. 11. Device according to claim 1, characterized in that several rows of recesses (32) distributed at equal or unequal distances from one another on the roller circumferences are formed or projections (34) are formed in the plates (16, 18, 38) and/or the casings (31, 33) of the malts (29, 30) transversely to the feed direction. 12. Device according to claim 11, characterized in that each row has recesses (32) or projections (34) of different sizes. 13. Device according to claims 11 and/or 12, characterized in that the recesses (32) machined into one plate (16, 38) or roller (29) are spherical, cylindrical or also cup-like or trough-like and the opposing projections (24, 34) formed on the other plate (20) or the casing (33) of the other roller (30) correspond to these recesses (32).