EP3197610A1

EP3197610A1 - Arrangement for pressing a pasty or fluid substance out of a film bag

Info

Publication number: EP3197610A1
Application number: EP15775125.6A
Authority: EP
Inventors: Manuel Buck
Original assignee: Sika Technology AG
Current assignee: Sika Technology AG
Priority date: 2014-09-23
Filing date: 2015-09-18
Publication date: 2017-08-02
Also published as: WO2016046095A1; CN106714979A; US20170327299A1

Abstract

The invention relates to an assembly for pressing a pasty or fluid substance out of a film bag (11) of a substantially cylindrical basic form. The film bag (11) is or can be accommodated in a cylindrical receptacle (12) having a circular inner cross-section A. The film bag (11) inserted into the cylindrical receptacle (12) is supported at a proximal end (24) of the cylindrical receptacle (12) against a closing cap (13) that closes off the cylindrical receptacle (12) at an end of the cylindrical receptacle. The film bag (11) can be acted upon on the side of the film bag facing away from the closing cap (13) by means of a pressing element (14) in order to press out the pasty or fluid substance via a press-out opening (15) in the closing cap (13). The closing cap (13) has an accommodating space (16) for accommodating the film during or after the pressing out of the film bag (11). The accommodating space (16) has an at least substantially rotationally symmetrical basic form having an accommodating opening (17) facing the cylindrical receptacle (12), which accommodating opening has a circular inner cross-section B. The assembly is characterized in that coupling devices (18 - 23) are provided on the cylindrical receptacle (12) and/or the closing cap (13), which coupling devices ensure that the inner cross-section A of the cylindrical receptacle (12) overlaps with the inner cross-section B within a tolerance of less than 50%, preferably of less than 20%, of the wall thickness W of the closing cap (13) on the distal side of the closing cap facing the cylindrical receptacle.

Description

Arrangement for pressing out a pasty or fluid substance from a foil bag

description

Technical area

The invention relates to an arrangement for extruding a pasty or fluid substance from a foil bag according to the preamble of

Patent claim 1.

State of the art

From the prior art are already filled with pasty or fluid substance foil bag of substantially cylindrical basic shape, which are usually closed at the ends, for example, by brackets and so far end rounded ends known. Such film bags are usually squeezed out by being inserted into a cylindrical receptacle which is closed at a first end, for example via a closure cap. From a second end of the cylindrical receptacle forth pressure is applied to the foil bag via a pressing element, so that the substance contained therein is pressed through a corresponding Auspressöffnung in the cap. In the

Closure cap is usually a disposable part made of plastic, which is conventionally inserted into the end of the cylindrical receptacle and fixed relative to the cylindrical receptacle via suitable fastening means.

However, there is the problem that the free for the film bag cross section within the cylindrical receptacle narrowed by the onset of the cap at least the wall thickness of the cap or the cap against the inner wall of the cylindrical receptacle for the foil bag when pressing the pasty or fluid substance represents a "step" with the result that it is not always guaranteed that the empty bag as desired completely folds into the receiving space formed by the cap.

Rather, it may happen that the film and / or pressing element catch on the step formed by the wall of the cap or worse, that parts of the film between cap and

Inner wall of the cylindrical receptacle in the extrusion direction

squeezed through. A removal of the cap with the emptied film can then considerably more difficult or impossible without the aid of suitable tools. In addition, there is a risk of damaging the pressing element and the sensitive sealing lips arranged thereon.

DE 10 2007 060 382 A1 describes a tubular bag gun with a handle which provides the user with an operating and guiding possibility of the pistol. The tubular bag gun also has an elongated hollow cylinder which serves to receive a tubular bag. For this purpose, the hollow cylinder is in relation to the side of the handle of the

Tubular gun side facing away open and can be closed with a cap-like closure. The closure can be connected to the hollow cylinder via suitable connecting means. In the D1, the cap is placed from the outside on the cylindrical receptacle. This does not create a step in the inner wall (as above

described). In such a solution, however, the film bag can not be accommodated in the cap, which makes the handling of the device difficult (for example, when it comes to the

folded foil bag with the cap after use). In DE 10 2007 060 382 A1, this is accomplished with a ring body, onto which the folded film is pushed. This is perceived as relatively complicated.

US 5,650,180 describes a device for the discharge of pasty

Materials, at the transition between a cylindrical receptacle and a cap is provided an extension into which the emptied film inserts. However, this solution does not come without steps, which can lead to complications. US 2009/0065527 A1 describes a device for discharging

Liquids in which there is also provided a step (in this case inside) between the closure cap and the receptacle for the material (with the problem described above). EP 1 065 153 A1 describes a film packaging for a pasty substance, with a film tube bag, at the front end of a lid part is firmly attached. Due to the firm connection between the film tube bag and the cover part of the film tube bag can not be inserted in the direction of the lid part, which complicates the handling of the device.

The present invention has set itself the goal of providing an arrangement in which a complete absorption of the film of the emptied film bag is ensured within the receiving space of the cap with sufficient certainty.

This object is achieved with an arrangement according to the features of claim 1. Advantageous developments are specified in the subclaims. An essential core idea of the present invention is to provide coupling devices which are effective between the cylindrical receptacle and the closure cap and which ensure that the (entire) inner cross-section A of the cylindrical receptacle and the

(entire) inner cross section B of the closure cap at its distal, the cylindrical receiving end facing overlap (at least substantially completely). According to the invention is also a deviation

(Tolerance) of less than 50%, preferably less than 20% of

Wall thickness of the cap on its distal, the cylindrical Recording facing end, from the (complete) overlap possible. The two inner cross-sections A, B must therefore not be completely in line. In the prior art (see Fig. 1 a and 1 b), this deviation is equal to 100% of the wall thickness. In other words, through the

Coupling devices ensure that the projections of the inner cross section A of the cylindrical receptacle and the inner cross section B of the cap at its distal end to a plane perpendicular to the central axis X (at least substantially) congruent or an inner cross section A or B over the other inner cross section B or A in this projection by no more than 50% of the wall thickness of

Cap at its distal end, preferably by not more than 20% of the wall thickness of the cap (at its distal end) protrudes. This avoids that the foil bag against a through the

Cap must be pressed predetermined level. Insofar as a (small) step remains due to an incomplete overlap of the inner cross sections A, B, this is at no point deeper than 50% of the wall thickness of the closure cap (preferably 20% of the wall thickness of the cap)

Cap) (depth being measured in the radial direction). The cylindrical receptacle and the closure cap are preferably (fixed) connectable to each other, for example via material and / or force and / or positive connection, for example via a friction lock and / or a tongue and groove connection and / or a screw connection and / or a

Bayonet lock and / or a cap can be connected.

The foil bag is supported against the cap. In particular, the film bag is basically movable relative to the closure cap and not (firmly) connected thereto. Insofar as the film bag is in contact with the closure cap, it can also be detachable from the closure cap (without causing damage to the film bag and / or closure cap and / or any connecting layer that may be present).

For clarity, it should be noted that the cylindrical receptacle does not necessarily have to have the basic shape of a circular cylinder, but also a cylinder with, for example, slightly oval basic shape can be.

Accordingly, then the inner cross section A of the cylindrical recording would not be an exact circle, but for example a light oval. Correspondingly, however, the inner cross-section B of the cap would be interpreted on the respective concrete, possibly slightly different from the rotational shape, inner cross-section A of the cylindrical receptacle. For example, it would be conceivable to unform a circular inner cross-section A or circular inner cross-section B with a diameter of 48 mm as an oval such that perpendicular axis measurements of 49 mm and 47 mm for the inner cross-section A and the inner cross-section B are given.

In a preferred embodiment, the cylindrical receptacle has at its end facing the closure cap on a circumferential groove or spring, in which the closure cap is fixed in the radial direction perpendicular to the central axis of the cylindrical receptacle.

This radial fixing of the closure cap is advantageous, since conventionally an exact compliance with the given

Inner cross-section B for the receiving space of the closure cap usually made as a disposable plastic part can not always be guaranteed to a sufficient extent and can also result in steps or gaps.

In a preferred embodiment, the closure cap is by a

Screw connection, a bayonet lock or a cap according to the principle of a union nut in the direction of the central axis X relative to the cylindrical receptacle axially fixed.

In a concretely possible embodiment, the cylindrical receptacle forms a groove which is open towards the inside of the cylindrical receptacle, the groove having a width in the radial direction viewed from the central axis X and the width of the closure cap at its distal end

equivalent. The distal end of the cap is in this Embodiment thus inserted into the cylindrical receptacle, that the inner surfaces of the cylindrical receptacle and cap are aligned. In addition or in addition, however, it is also possible for the closure cap to have a groove into which the end of the cylindrical receptacle facing the closure cap engages. In a concretely possible embodiment, the end of the cylindrical receptacle facing the closure cap may have an encircling spring which engages in the groove of the closure cap.

For fixing the cap in the axial direction (parallel to the

Central axis X) may be provided a cap which has at its end facing the cylindrical receptacle first engagement means which are formed corresponding to the closure cap facing the end of the cylindrical receptacle formed second engagement means. The trained on the cap first engagement means may be, for example, an internal thread, the one on the

Outside of the cylindrical receptacle provided corresponding external thread can be screwed. Instead of a thread would be

For example, but also a bayonet lock conceivable.

In a preferred embodiment, the cap

An alignment having an orientation of a preferred axis of the cap collinear to the central center axis X of the cylindrical

Ensure recording. Ideally, the proposed

Cap so far both a determination of the cap in the axial direction parallel to the longitudinal axis X and in the radial direction, ie perpendicular to the longitudinal axis X.

In a further preferred embodiment, the closure cap has an extrusion nozzle which is in particular integrally molded. In this case, the alignment of the cap example, investment elements include, which surround the Auspressdüse from the outside and thus the

Set the cap in the desired orientation.

In a concrete possible embodiment, the arrangement further comprises a gear unit for connecting a, in particular electric drive, to act on the pressing element in the direction of the closure cap.

In a further possible embodiment, in addition to the cylindrical receptacle for receiving a film bag is still at least one

Cartridge receiving device for receiving a replaceable

Cartridge provided, which contains a second pasty or fluid substance and a mixing device for mixing the two substances, wherein the transmission unit is designed and designed, via correspondingly provided drive elements, a simultaneous extrusion of the substance from the foil bag and the substance from the

Cartridge receiving device with subsequent mixing of the two substances to effect.

Presentation of the invention

The invention will be explained below with respect to further features and advantages with reference to the description of exemplary embodiments and with reference to the following drawings. Hereby show:

Fig. 1 a and 1 b the starting problem for the present invention in

State of the art;

Fig. 2 shows a first possible embodiment of an arrangement according to the present invention;

Fig. 3 shows a second possible embodiment of an arrangement according to the present invention; Fig. 4a shows a third possible embodiment of an arrangement according to the present invention; Fig. 4b modification of the third possible embodiment

Arrangement according to the present invention;

Figures 5a and 5b show a fourth embodiment of a filled foil bag assembly of the present invention (Figure 5a) and a squeezed foil bag (Figure 5b);

Fig. 6 shows an embodiment of a development of the present

Invention in a schematic view. In Fig. 1 a and b the starting problem for the present invention is illustrated by the prior art. In a cylindrical receptacle 12, a foil bag 1 1 is receivable. At a proximal end 24, the cylindrical receptacle 12 through a cap 13th

closed, which has a squeezing opening 15. By means of a

Pressing element 14 (see Figures 2 to 6) can be inserted into the cylindrical receptacle 12 film bag 1 1 (see Figures 2 to 6) in the direction of the

Cap 13 are acted upon and so absorbed in the film bag 1 1 substance are squeezed out through the ejection opening 15. Since the cap 13 is inserted into the cylindrical receptacle 12, in the prior art, the inner cross-section B of a receiving space 16 of the cap 13 at least twice the wall thickness of

Closure cap 13 at its distal end smaller than the inner cross section A of the cylindrical receptacle. This results in the film of the film bag 1 1 a step 37 'when the remaining film of the film bag is pressed into the receiving space 16 of the cap 13 in the emptying process. An additional problem arises from the fact that due to tolerances and / or deviations from an exact circular shape, the closure cap 13 has a cross-section which allows one or more gaps 38 'relative to the inner cross section of the cylindrical receptacle 12. When the foil bag is pressed out, therefore, part of the foil can be pressed into such a gap 38 ', with the result that the cap 13 can not then be removed from the cylindrical receptacle 12 any longer, at least not without tools. In addition, there is the risk that it in case of improper transfer of the emptied film in the receiving space 16 of the cap 13 to

Damage to the ram, especially on the circumferentially arranged on the ram sealing lips can come.

The embodiments according to FIGS. FIGS. 2 to 6 show, by way of example, how the described problems can be remedied. It is crucial that it is ensured via coupling devices that the closure cap is attached to the cylindrical receptacle such that the inner cross section A of the cylindrical receptacle 12 is substantially congruent with the inner cross section B of the closure cap 13, ie inner cross section A and inner cross section B overlap everywhere or at no point more than 50% of the wall thickness W of the closure cap are offset at its distal side facing the cylindrical receptacle. The coupling devices that ensure the most accurate possible overlap of the inner cross-section A of the cylindrical receptacle 12 with the inner cross-section B of the cap 13 may be formed in different ways. For this purpose, several embodiments are described below by way of example.

In a first embodiment, which is illustrated in Fig. 2, the coupling means by a proximal end 24 of the

cylindrical receptacle 12 provided groove 25 is formed. The cylindrical receptacle thus has at its proximal end 24 a groove 25 open towards the inside of the cylindrical receptacle. In this case, the groove 25 has a width in the radial direction considered from the central axis X, that of the width the closure cap 13 corresponds to its distal, the cylindrical receiving end facing. By this measure, an arrangement is created in which the inner wall of the cylindrical receptacle is flush in the inner wall of the cap 13, with the result that the problem of pressing the film into a gap or overcoming a step are no longer given. The cap 13 may be secured in a suitable manner in the axial direction relative to the cylindrical receptacle; For example, the cap 13 may have an external thread and the groove have a corresponding internal thread. But it is also possible, the closure cap 13 via a connection in the manner of a

Insert bayonet lock in the groove 25 of the cylindrical receptacle. Finally, it would also be conceivable (cf., for this purpose, the embodiments according to FIGS. 5a and 5b) to fasten the closure cap 13 to the cylindrical receptacle via a cap 27.

In Fig. 3, another embodiment is shown in which a

Closure cap 13 is attached to the end face of the proximal end 24 of the cylindrical receptacle 12 and in this case also such that the inner cross-section A of the cylindrical receptacle 12 is plane in the inner cross-section B of

Cap 13 passes. Again, there are different ones

Mounting options conceivable to set the cap 13 in the axial direction parallel to the central axis X, insofar as the coupling devices can here, for example via a cap 27 or via a flange, which may be provided on the cylindrical receptacle 12 and the cap 13 (not shown) realized be.

In Fig. 4a, a further embodiment of the inventive arrangement is shown. In this arrangement, the coupling means are realized in that the closure cap 13 has a groove 28, which is open in the present embodiment in the direction of the central axis X out. The proximal end 24 of the cylindrical receptacle 12 is encompassed by the groove 28 of the cap 13, so that the cap 13 is fixed in directions perpendicular to the central axis X and at the same time adapting to the inner cross section A of the cylindrical receptacle 12 is ensured at its proximal end 24. The cap 13 may at the

Embodiment of Fig. 4a are attached in appropiate manner to the cylindrical receptacle 12, for example by means of a cap 27 (not shown here).

FIG. 4b shows a modified embodiment of the arrangement according to FIG. 4a. In this embodiment, the closure cap 13 is screwed onto the proximal end of the cylindrical receptacle 12 via a screw connection, the closure cap 13 for this purpose forming an internal thread correspondingly formed in the groove 28, which cooperates with a corresponding external thread on the proximal end 24 of the cylindrical receptacle 12 be. The closure cap 13 can be desired in this embodiment (but also in the other embodiments described herein) as well as a disposable part

be designed.

In the Fign. 5a and 5b, another embodiment is illustrated, in which the coupling means are realized in that the closure cap 13 has a groove 28 open towards the center axis X of the cylindrical receptacle 12, wherein the groove wall facing away from the central axis X is formed obliquely, so for distal end of the

Closure cap 13 opens and on the cylindrical receptacle 1 a circumferential spring 26 frontally at the proximal end of the cylindrical

Recording 12 is formed. As a result, when you place the

Cap 13 on the rotating spring 26 with a sloping edge a self-centering of the cap 13th

About a cap 27, the cap 13 is attached to the cylindrical receptacle. For this purpose, the cap 27 has at its end facing the cylindrical receptacle 12 first engagement means 29, which correspond to at the cap 13 facing the end of the cylindrical receptacle 12 formed second engagement means 30th are formed. In the concrete case, the first engagement means 29 on the cap 27 may be an internal thread and the second engagement means 30 on the cylindrical receptacle may be a correspondingly formed external thread.

In addition, the closure cap 13 in the present embodiment still on alignment means 31, which are concretely formed by contact elements 33. Said abutment element 33 is based on an extrusion nozzle 32 integrally formed on the closure cap 13 and furthermore ensures that the preferred direction of the closure cap 13 is aligned colinearly with the central axis X of the cylindrical receptacle 12.

In Fig. 6 is a particularly preferred embodiment of

Inventive arrangement illustrated. In addition to the cylindrical receptacle 12, this arrangement also has a cartridge receiving device 35 for receiving a replaceable cartridge 36 and a mixing device 39 for mixing the first pasty or fluid

Substance from the film bag 1 1 with the second pasty or fluid substance from the removable cartridge 36 on.

Via a gear unit 34 and provided accordingly

Drive elements 40, the arrangement is such that in a concerted manner a simultaneous pressing of the pasty or fluid substance from the foil bag 1 1 is carried out with a squeezing the pasty or fluid substance from the removable cartridge 36, wherein both substances before dispensing through a dispensing nozzle 41 are mixed together in the mixing device 39 designed as a mixer. LIST OF REFERENCE NUMBERS

1 1 foil bag

12 (cylindrical) recording

13 cap

14 pressing element

15 ejection opening

16 recording room

17 receiving opening

24 proximal end

25 groove (cylindrical receptacle)

26 spring (cylindrical receptacle)

27 cap

28 groove (cap)

29 first intervention means

30 second engagement means

31 alignment devices

32 ejection nozzle

33 investment elements

34 gear unit

35 cartridge receiving device

36 interchangeable cartridge

37 'level

38 'split

39 mixing device

40 drive elements

41 dispensing nozzle

Claims

claims

Arrangement for extruding a pasty or fluid substance from a foil bag (1 1) of a substantially cylindrical

Basic form,

wherein the film bag (1 1) in a cylindrical receptacle (12) with a circular inner cross-section A recorded or

is receivable, wherein in the cylindrical receptacle (12)

introduced foil bag (1 1) at a proximal end (24) of the cylindrical receptacle (12) against a cylindrical receptacle (12) end-capped closure cap (13) is supported and wherein the foil bag (1 1) at its the cap (13) opposite side with a pressing element (14) is acted upon to the pasty or fluid substance via an ejection opening (15) in the

Squeeze cap (13), wherein the closure cap (13) has a receiving space (16) for receiving the film during or after the pressing of the film bag (1 1),

wherein the receiving space (16) has an at least substantially rotationally symmetrical basic shape with a receiving opening (17) facing the cylindrical receptacle (12) with a circular shape

Internal cross-section B has,

characterized ,

in that coupling devices (25 to 28) on the cylindrical

Receiving (12) and / or the closure cap (13) are provided, which ensure that the inner cross section A of the cylindrical receptacle (12) with the inner cross-section B within a tolerance of less than 50%, preferably less than 20% of the wall thickness W the cap (13) overlaps at its distal, the cylindrical receiving side facing. Arrangement according to claim 1, characterized in that the cylindrical receptacle at its the cap (13) facing the end has a circumferential groove (25) or spring (26) in which the closure cap (13) in the radial direction perpendicular to the central axis X of the cylindrical Recording (12) is fixed.

Arrangement according to claim 1 or 2, characterized in that the closure cap (13) by a screw connection, a

Bayonet closure or a cap (27) according to the principle of a union nut in the direction of the central axis X is axially fixed.

Arrangement according to claim 2 or 3, characterized in that the cylindrical receptacle (12) one to the inside of the cylindrical

Reception open groove (25) forms, wherein the groove (25) in radial direction as viewed from the central axis X has a width corresponding to the width of the closure cap (13) at its distal end.

Arrangement according to one of claims 1 to 4, characterized in that the closure cap has a groove (28) into which the

Closure cap (13) facing the end of the cylindrical receptacle (12) engages.

Arrangement according to claim 5, characterized in that the closure cap (13) facing the end of the cylindrical receptacle

(12) has a circumferential spring (26) in the groove (25) of the

Locking cap (13) engages.

Arrangement according to one of claims 1 to 6, characterized in that a cap (27) is provided which has at its the cylindrical receptacle (12) facing the end first engagement means (29) corresponding to that of the cap

(13) facing the end of the cylindrical receptacle (12) formed second engaging means (30) are formed, wherein mounted in the Condition the union nut (27), the cap (13) defines in the axial direction.

Arrangement according to one of claims 1 to 7, characterized in that the cap (27) alignment means (31) which an orientation of a preferred axis of the cap (27) collinear to the central longitudinal axis X of the cylindrical receptacle (12)

guarantee.

Arrangement according to claim 8, characterized in that the

Closure cap (13) one in particular integrally formed

Auspressdüse (32) and the alignment means (31) of the cap (27) by means of abutment elements (33) are formed, which engage around the Auspressdüse (32) from the outside.

Arrangement according to claim 9, characterized in that the

Arrangement further comprises a transmission unit (34) for connecting a, in particular electric drive, comprises, in order to act on the pressing element (14) in the direction of the closure cap (13).

Arrangement according to one of claims 1 to 10, characterized

characterized in that in addition to the cylindrical receptacle (12) for receiving the film bag (1 1) at least one

Cartridge receiving device (35) for receiving a

replaceable cartridge (36) is provided, in which a second pasty or fluid substance is received, and further comprises a mixing device (39) for mixing the first pasty or fluid substance from the foil bag (1 1) with the second pasty or fluid substance from the interchangeable cartridge (36), wherein the gear unit (34) is designed and designed, via corresponding drive elements (40) in a coordinated manner, a simultaneous extrusion of pasty or fluid

Substance from the foil bag with a pressing of pasty or to effect fluid substance from the replaceable cartridge and subsequent mixing of the two substances.