EP3808441A1 - Mixing vessel - Google Patents

Abstract

The present invention relates to a mixing container (10) for mixing liquid or fluid filling goods, with a cylindrical container wall (12) and a lower disk-shaped container base (14). For cost-effective production and quick re-use for the subsequent mixing process, the invention provides that the mixing container (10) has at least four individual, detachably connected container components, namely a cylindrical container wall (12), a lower disk-shaped container base (14), Container wall (12) used inliner sack (16) made of thin-walled plastic film and a clamping ring (18) connecting the lower disk-shaped container base (14) to the container wall (12), the inliner sack (16) used having a cylindrical inliner wall (20) and has a disk-shaped inliner base (22) and is firmly fixed in the lower region of the cylindrical container wall (12) and / or the lower disk-shaped container base (14).

Description

The present invention relates to a mixing container for mixing liquids, with a cylindrical container wall, a lower disk-shaped container base and an inliner sack inserted therein.

Mixing tanks are required in various branches of industry, such as B. in the chemical, paint, plastic and food industries for the production of liquid intermediate and end products. Mixing tanks are z. B. also as a pharmaceutical container for stirring and mixing z. B. ointments, known as reactors and storage containers for glue and paint production or as agitator containers for the food industry for homogenizing and mixing sauces, marinades or other liquid media. The stirring and mixing of the liquids is basically effected by an inserted stirrer or mixing tool. The stirring tool such. B. a propeller stirrer is selected depending on the viscosity of the liquids to be mixed.

Previously known mixing containers usually consist of stainless steel components screwed or braced together and are very expensive. They have to be cleaned in a time-consuming manner for each reuse and the washing liquid has to be processed and disposed of in a laborious manner. In order to simplify the cleaning of the mixing container, some industries have switched to equipping the mixing container with an inliner sack, which, as a disposable protective lining, protects the interior of the mixing container from adhesion of the mixed material.

A mixing container with an inliner bag inserted therein is, for. B. from the publication EP 2 168 670 B1 known. It describes a bulk material mixer for mixing powdery bulk material or granules (e.g. powder mixtures for paint production or plastic-granulate mixtures), which has a base plate with a cylindrical outer container attached to it and a lifting column arranged next to it. A heavy container cover with an attached mixing tool is attached to the lifting column so that it can be moved vertically and swiveled horizontally to the side. An inner container, which is referred to as a container receptacle, is inserted into the outer container. An inliner sack - also referred to as a container or plastic sack - is then inserted into the inner container, into which the powdery material to be mixed is poured. The inliner sack is then folded over with its upper end over the opening edge of the inner container and is later clamped by the attached lid against the opening edge of the inner container. For better accessibility, the container lid for filling the inliner bag - as well as for removing it - is raised and to the side panned. In its area enclosed by the outer container, the inner container is provided with a plurality of perforations in the manner of a grid, and the outer container is equipped with a connection for a vacuum pump. During the mixed operation, a negative pressure is generated inside the outer container, so that the inliner sack is sucked onto the inner wall of the inner container and is thus fixed.

After the end of the mixing process, the lid attached to the lifting column together with the mixing tools is moved upwards out of the mixing container and swiveled to the side, after which the inliner bag can be removed from the inner container as a container with the ready-mixed material after switching off the vacuum pump . The container can still be closed before it is removed from the inner container. To facilitate insertion and removal, the inliner sack is designed to be conically tapered from its upper filling opening down to the bottom.

In the pamphlet DE 20 2013 103 591 U1 an industrial mixing machine is described which has an upper mixing head carrying one or more mixing tools and a lower mixing container, both of which are connected to one another via a circumferential annular flange. The lower mixing container has an annular cylindrical container body, to which a truncated cone-shaped or conical container part with a bottom-side outlet channel and a closable outlet fitting arranged therein is connected. In the lower mixing container, a correspondingly cylindrical / conical shaped inliner is inserted, which has a circumferential flange edge on its upper edge, which is positioned and clamped between the circumferential ring flanges of the upper mixing head and the lower mixing container. At the bottom, the shaped inliner opens with a tubular outlet extension into the outlet channel of the mixing container and is clamped there by a disc-shaped closing flap of the outlet fitting. To carry out the mixing process, the material to be mixed is poured into the lower mixing container, after which the mixing container is connected to the upper mixing head and locked. The mixing head and mixing container are then turned into an overhead position so that the mix can be mixed by the mixing tools arranged in the mixing head. In the process, a certain overpressure is built up in the mixing chamber so that the form inliner also remains in its contact position on the inner wall of the mixing container for the mixing process in order not to hinder the mixing process. In this known mixing machine, although the lower mixing container is protected from contamination or caking by the inserted form inliner, the upper mixing head with the mixing tools arranged in it has to be cleaned again at great expense after each mixing process. The complex construction with swivel device and the specially shaped inliner make this cost-intensive Mixing device with still required washing process not very environmentally friendly and uneconomical.

Furthermore, in the U.S. 5,465,863 a special container especially for the storage and transport of hotmelt (hot melt adhesives) is described. The container, preferably a steel barrel container, consists of a cylindrical container wall, a bottom and a lid or top, which are fastened to the cylindrical container wall with two clamping rings. The steel container is provided with a removable inliner lining made of fiber film material (rolled fiber film, kraft paper). The inliner lining consists of three separate parts, namely two panes that are applied to the inner surface of the top and bottom, and a rectangular film that is glued to the inner surface of the cylindrical container wall with an overlap. To do this, the entire inner surface of the steel barrel is coated with an adhesive.

Hotmelt adhesives are filled while hot in a viscous state and solidify at room temperature. To remove the solidified hotmelt adhesive from the open lid barrel, a heated printing sequence stamp is used, which sucks the hotmelt adhesive that has melted at the top through the central pressure stamp. The known steel barrel with the detachable three-part inliner lining is not suitable for holding liquids, however, because it has no seal on the lower clamping ring connection between the cylindrical container wall and the bottom. A tension ring fastener can never be sealed with the incompressible fiber film coatings lying on top of one another on the cylindrical container wall and the disc-shaped underbody. As soon as the disc-shaped inliner lining made of kraft paper is inserted and pressed into the upwardly open U-shaped circumferential groove in the bottom cover to accommodate the rolled edge of the cylindrical container wall, inevitable small wrinkles result, which always result in the container leaking. In the case of a hotmelt filling material, these mini-folds are not critical, since the little hotmelt filling material that penetrates immediately cools and solidifies and in this way seals the container sufficiently. For common low-viscosity products such as. B. paints and varnishes, this barrel cannot be used.

It is the object of the present invention, on the one hand, to propose a mixing container with an inliner sack which is very inexpensive to manufacture and which, on the other hand, can be quickly and easily prepared for further use and made ready for use.

This object is achieved in the present invention in that the new mixing container, following a structurally simple structure, has at least four individual ones that can be detached from one another comprises connected container components, namely a cylindrical container wall with an upper and a lower rolled edge, a lower disk-shaped container base, an inliner sack made of thin-walled plastic and / or metal foil inserted into the container wall and a lower clamping ring connecting the lower disk-shaped container base to the container wall, the The inliner sack used has a cylindrical inliner wall and a disc-shaped inliner base, and the disc-shaped inliner base is provided with a flange edge protruding beyond the cylindrical inliner wall, which in the inserted state is circumferentially between the lower disc-shaped container base and the lower edge of the The container wall is arranged and clamped firmly and securely against rotation by the attached lower clamping ring.

By bringing together components that are simple in themselves and available in the usual barrel production process, including a cylinder-shaped container wall open on both sides, a disk-shaped container base, a clamping ring lock and a cylindrical inliner sack, a very inexpensive mixing container can be produced in a surprisingly simple manner, compared with known construction variants made of stainless steel.

Cylindrical container walls that are open on both sides occur in the manufacture of lidded drums from sheet steel as a semi-finished product or as an intermediate product. These are also referred to as "frame" before the disc-shaped barrel bottom is firmly attached and permanently rolled or crimped.

As an important construction measure, the fixing of the inliner sack in the inserted state on the circumference between the lower disc-shaped container base and the lower edge of the container wall and by the attached lower clamping ring prevents the inliner sack from twisting during the mixing process due to friction of the material to be mixed and wrinkles. The suitability as a mixing container is only guaranteed by the detachable component assembly of the cylindrical container wall and the disk-shaped container bottom by means of a clamping ring lock and the simple possibility of being able to fix the inliner sack in its lower area in an easily detachable manner.

For a secure fixation of the inliner bag, it is provided that the disc-shaped inliner base is provided with a flange edge protruding beyond the cylindrical inliner wall, which in the inserted state is arranged circumferentially between the lower disc-shaped container base and the lower edge of the container wall and from the attached lower one The clamping ring is clamped tightly and securely against rotation. To a To achieve a sufficient clamping effect, the disc-shaped inliner base has a protruding flange edge with a width of at least 10 mm which extends beyond the diameter of the cylindrical inliner wall. Such an inliner sack with a disc-shaped inliner base and a flange edge protruding on the outside can be produced simply and inexpensively.

And with an inliner sack designed in this way with a flange edge protruding radially at the lower edge of the cylindrical inliner wall, the insertion and fixing of the inliner sack in the mixing container as well as the replacement and removal of the used liner sack is particularly easy to accomplish. Essentially, all that needs to be done is to put on the lower clamping ring and tighten or loosen it.

In an embodiment of the invention it is provided that the outer peripheral edge of the flange edge of the inliner base welded to the cylindrical inliner wall alternately has a larger and a smaller distance A, a from the cylindrical inliner wall. The smaller distance a from the cylindrical inliner wall to the outer peripheral edge should be at least 20 mm and the larger distance A from the cylindrical inliner wall to its outer peripheral edge should be at most 200 mm.

In a preferred structural embodiment, the inliner base welded to the cylindrical inliner wall has a square basic shape.

When the bottom lid is placed on the container edge, unavoidable mini-folds arise in the flange edge of the inliner base in the U-shaped circumferential groove in the lid edge. In the present invention, these mini-folds are only of advantage for an improved holding / fixing function of the protruding flange edge, because a sealing function for the inliner sack is not required here, only a fixing function.

For the formation of a closed mixing container it is provided that an upper disk-shaped container lid with a corresponding bung opening and a second upper clamping ring connecting the upper container lid to the upper edge of the container wall is placed on the four individual container components that are detachably connected to one another.

• Die Produktivität des Reinigungsvorganges wird signifikant erhöht; der Bedarf an Waschflüssigkeit und deren nachfolgende Wiederaufbereitung wird stark reduziert. Der Reinigungsvorgang schont die Ausstattung und das Reinigungspersonal, die Reinigungsrückstände sind leichter zu entsorgen.
• Der erfindungsgemäße Mischbehälter ist in Stahlblechausführung aus einzelnen standardisierten Bauteilen aus der Stahlfassfertigung z. B. für 215 Liter oder 300 Liter Deckelfässer hergestellt. Dies gewährt eine äußerst preiswerte Herstellung der Mischbehälter.
• Der erfindungsgemäße Mischbehälter kann in anderer Ausführung mit einer zylinderförmigen Behälterwandung aus Kunststoff oder gewickeltem Kraftpapier (= Fiberdrum) ausgebildet sein. Ebenso können der obere scheibenförmige Behälterdeckel und der untere scheibenförmige Behälterboden aus Kunststoff oder Sperrholz hergestellt sein. Diese Bauteile stehen aus der üblichen Herstellung von Kunststoff-Deckelfässern und Fiberdrums zur Verfügung.
• Der Inlinersack ist sehr einfach aus einer Schlauchfolie mit angeschweißter Bodenscheibe aufgebaut und besteht aus dünnwandiger Kunststoff- oder Metallfolie oder aus einem mehrschichtigen Mix davon.

The advantages of the mixing container according to the invention are:

• The productivity of the cleaning process is significantly increased; the need for washing liquid and its subsequent reprocessing is greatly reduced. The cleaning process protects the equipment and the cleaning staff, the cleaning residues are easier to dispose of.
• The mixing container according to the invention is made of sheet steel from individual standardized components from the steel barrel production z. B. manufactured for 215 liter or 300 liter lidded drums. This allows the mixing containers to be manufactured extremely inexpensively.
• The mixing container according to the invention can be designed in another embodiment with a cylindrical container wall made of plastic or wrapped kraft paper (= fiber drum). Likewise, the upper disk-shaped container lid and the lower disk-shaped container base can be made of plastic or plywood. These components are available from the usual production of plastic lidded drums and fiber drums.
• The inliner sack is very simply constructed from a tubular film with a welded-on bottom plate and consists of thin-walled plastic or metal film or a multi-layer mix of these.

The measures indicated in the claims or the description are - as far as technically possible - all interchangeable and / or combinable with one another.

With the present invention, mixing containers can be produced in an extremely cost-effective manner and reused many times over in a sustainable and environmentally friendly manner. In the following description of the figures, further features relevant to the invention are shown.

Figur 1

einen erfindungsgemäßen Mischbehälter in schematischer Darstellung,

Figur 2

eine zylinderförmige Behälterwandung für einen Mischbehälter in Gestalt eines 215 Liter Stahlfasses,

Figur 3

eine zylinderförmige Behälterwandung für einen Mischbehälter in Gestalt eines 300 Liter Stahlfasses,

Figur 4

einen schematischen Aufbau eines erfindungsgemäßen Mischbehälters mit zusammengefaltetem Inlinersack,

Figur 5

einen schematischen Aufbau des Mischbehälters gemäß Fig. 4 mit teilwiese hochgezogenem Inlinersack und geschlossenem Unterboden,

Figur 6

einen schematischen Aufbau des Mischbehälters gemäß Fig. 4 mit vollständig hochgezogenem Inlinersack und angedeutetem Behälterdeckel mit oberem Spannring,

Figur 7

in auseinandergezogener Darstellung die einzelnen Bauteile des Mischbehälters mit einem untergestellten Rollbock,

Figur 8

einen schematischen Aufbau des erfindungsgemäßen Mischbehälters mit eingesetztem Rühr/Misch-Werkzeug,

Figur 9

in schematischer Darstellung einen Inlinersack aus dünnwandiger Kunststoff-Folie mit überstehendem Flanschrand am Inliner-Boden,

Figur 10

in schematischer Darstellung einen Mischbehälter mit bodenseitiger Auslaufarmatur,

Figur 11

in beispielhafter Darstellung ein Befüll- und Entnahme-Pumprohr zum Einsatz in den oberen Deckel des Mischbehälters,

Figur 12

eine besonders bevorzugte Ausgestaltungsform eines Inlinersacks mit quadratförmigem Inlinerboden-Flanschrand in Draufsicht,

Figur 13

einen erfindungsgemäßen Mischbehälter in Seitenansicht mit eingesetztem Inlinersack gemäß Fig. 12 und

Figur 14

einen unteren Eckbereich des Mischbehälters gemäß Fig. 13 in vergrößerter Darstellung.

The invention is explained and described in more detail below with reference to the exemplary embodiments shown in the drawings. Show it:

Figure 1

a mixing container according to the invention in a schematic representation,

Figure 2

a cylindrical container wall for a mixing container in the form of a 215 liter steel barrel,

Figure 3

a cylindrical container wall for a mixing container in the form of a 300 liter steel barrel,

Figure 4

a schematic structure of a mixing container according to the invention with a folded inliner sack,

Figure 5

a schematic structure of the mixing container according to Fig. 4 with partially raised inliner sack and closed underbody,

Figure 6

a schematic structure of the mixing container according to Fig. 4 with completely raised inliner sack and indicated container lid with upper clamping ring,

Figure 7

exploded view of the individual components of the mixing container with a trestle placed underneath,

Figure 8

a schematic structure of the mixing container according to the invention with an inserted stirring / mixing tool,

Figure 9

a schematic representation of an inliner sack made of thin-walled plastic film with a protruding flange edge on the inliner base,

Figure 10

a schematic representation of a mixing container with a bottom-side outlet fitting,

Figure 11

an exemplary representation of a filling and removal pump pipe for use in the upper lid of the mixing container,

Figure 12

a particularly preferred embodiment of an inliner sack with a square inliner base flange edge in plan view,

Figure 13

a mixing container according to the invention in a side view with an inserted inliner bag according to FIG Fig. 12 and

Figure 14

a lower corner area of the mixing container according to FIG Fig. 13 in an enlarged view.

In Figure 1 Reference numeral 10 denotes a mixing container according to the invention for mixing liquid or fluid contents, which in a closed version comprises six essential components, namely a cylindrical container wall 12, a lower disk-shaped container bottom 14, an inserted inliner sack 16 made of thin-walled plastic film, one the lower disk-shaped container bottom 14 with the container wall 12 connecting lower clamping ring 18, an upper disk-shaped container cover 24 and an upper clamping ring 26. An open version of the mixing container 10 does not require an upper container cover 24. In any case, the cylindrical container wall 12 is provided with a lower rolled edge 28 and an upper rolled edge 30. The rolled edges 28, 30 are designed as a stable counter-bearing to support the lower container bottom 14 and to support the upper container lid 24 for clamping the upper and lower clamping rings 26, 18 and thus serve to close the upper and lower container openings of the cylindrical container wall 12.

The lower disk-shaped container bottom 14 is identical to the upper disk-shaped container lid 24 and the bung openings contained therein are then closed with a bung stopper. The container lid 24 as well as the container bottom 14 are semicircular with a semicircular shape that is adapted to the respective rolled edges 28, 30 of the container wall 12 Outer edge 32, 34 provided, in each of which a conventional PU seal can be glued or foamed. The semicircular outer edges 32, 34 of the container lid 24 and the container base 14 are overlapped by the respective clamping ring 26, 18 in the closed state and the seals arranged therein are pressed onto the rolled edges 28, 30.

The inliner sack 16 has a cylindrical inliner wall 20 and a disk-shaped inliner base 22 and is at the lower edge with an enlarged diameter of the disk-shaped inliner base 22 with a radially protruding flange edge 36 and optionally on the upper edge with a radially protruding flange edge 38 Mistake.

According to the present invention, the lower, outwardly protruding flange edge 36 is arranged on the circumferential side between the semicircular outer edge 32 with the sealing ring of the lower disk-shaped container base 14 and the lower rolled edge 28 of the container wall 12 and is clamped firmly and twist-proof by the attached lower clamping ring 18. The flange edges 36, 38 on the upper and lower edge of the inliner wall 20 have a width of at least 10 mm in order to achieve a sufficiently good clamping effect and fixation of the inliner in the mixing container.

The upper container lid 24 with the tightened upper clamping ring 26 fixes the upper radially protruding flange edge 38 of the inliner bag 16 in the same way. The seals in the container lid 24 and in the container bottom 14 of the mixing container 10 are advantageous for clamping the inliner flange edges 36, 38; they ensure a gentle but firm clamping of the thin-walled inliner flange film.

To insert a stirring tool or mixing tool 52 and / or a filling / removal pump tube 56, the upper container lid 24 has a 3-inch bung opening, a 2-inch bung opening and / or as a control opening with a 3/4 inch - Bung opening provided. The mixing container 10 is advantageously set up on a trestle 40 and can thus be easily moved back and forth.

In an open version without an upper container cover 24, a cross member can be placed on the upper rolled edge 30 as a holder for a mixing tool and fastened with the upper clamping ring 26. In a simple embodiment without an upper flange edge 38, the cylindrical inliner wall 20 can be designed to be extended towards the top. To fix the inliner bag 16 at the top, the extended inliner wall 20 is folded over the upper rolled edge 30 of the container wall 12 and is fixed with the tensioned ring 26; it can optionally also be secured with a thin tension belt or adhesive tape.

Cylindrical container walls open on both sides - often also referred to as "frame" - are produced as a semi-finished product or intermediate product in the production of conventional lidded drums made of sheet steel with molded rolled edges. Shows in an exemplary manner Figure 2 a cylindrical container wall 42 for a mixing container 10 according to the invention in the form of a 215 liter steel barrel and Figure 3 a cylindrical container wall 44 for a mixing container 10 according to the invention in the form of a 300 liter steel barrel, each with a lower and an upper rolled edge 28, 30.

In the following Figures 4 to 6 the simple insertion process for the inliner sack 16 is shown schematically. In Figure 4 the flat folded inliner sack 16 is placed on the lower container bottom 14 in such a way that the lower flange edge 36 of the inliner sack 16 covers the upwardly open semicircular outer edge 34 of the disc-shaped container bottom 14. Then the cylindrical container wall 12 with the lower rolled edge 28 is placed on the flange 36 and the lower clamping ring 18 is stretched, with the peripheral flange 36 of the inliner bag 16 firmly clamped between the semicircular outer edge 34 of the container bottom 14 and the lower rolled edge 28 of the container wall 12 and is fixed. The inliner sack 16 is then pulled up - as in FIG Figure 5 can be seen. When the inliner sack 16 is fully raised, according to FIG Figure 6 the upper flange 38 placed over the upper rolled edge 30 of the container wall 12, the container lid 24 put on and the upper clamping ring 26 clamped. It can be seen from this that the mixing container can be equipped with an inliner sack 16 and made ready for use in just a few steps in a very short time. Exchanging a used inliner bag for a new inliner bag is just as quick and easy to make the mixing container ready for the next mixing process with other mixes.

An exploded view of the individual components of the mixing container 10 according to the invention is shown in FIG Figure 7 evident. The container wall 12 is provided with rolled edges 28, 30 at the bottom and top, to which the lower container base 14 and the upper container lid 24 are firmly connected by means of lower and upper clamping rings 18, 26. The inliner sack 16 arranged within the container wall 12 is not visible here. The upper container lid 24 has a 3-inch bung opening 48 and a 2-inch bung opening 50 into which an agitator / mixing tool 52 and a fill / remove pump tube 56 can be inserted. In the schematic representation in Figure 8 it can be seen that an agitator / mixing tool 52 is inserted into the container lid 24. Furthermore, the arrows 54 indicate that the inliner sack is firmly fixed by the upper and lower circumferential Clamping of the flange edges of the inliner bag is displayed. When low-viscosity liquids are mixed, splashes that adhere to the underside of the container lid 24 can easily occur. In order to protect the container lid 24, a separate disc-shaped inliner film is arranged on the underside of the container lid 24 (not visible in the drawing), which can be easily removed again e.g. B. is attached by means of a pressure-sensitive adhesive or double-sided tape. The diameter of the inliner disc is at least as large as the diameter of the upper container lid 24, the outer edge of the disc-shaped inliner film being arranged between the outer edge 32 of the upper container lid 24 and the upper rolled edge 30 of the cylindrical container wall 12 and by means of the upper clamping ring 26 is clamped firmly and twist-proof. In the unclamped state, the inliner disc can protrude on the circumference by up to 20 mm beyond the diameter of the upper container cover 24.

Figure 9 shows in an individual representation once again the inliner sack 16 with a cylindrical inliner wall 20, with a lower disk-shaped inliner bottom 22 and a radially outwardly projecting lower flange edge 36 and on the upper edge of the inliner wall 20 the upper flange edge 38. The inliner sack 16 can be made of different materials depending on the application, e.g. B. from HDPE, LDPE (also antistatic), PP (antistatic as standard), from monofilms (LDPE, also antistatic and conductive), HDPE, polyamide or from multi-layer coextrusion films (antistatic and conductive), aluminum composite films. The film thickness can be between 100 µm, 150 µm and 250 µm depending on the application.

For a 215 ltr. Steel barrel consists of the inliner sack z. B. made of LDPE film with the dimensions 610 x 1300 x 0.2 mm. The film thickness can also be up to 0.5 mm for large containers.

An open-top version of a mixing container 10 is shown in FIG Figure 10 evident. The container bottom 14 is provided with a removal opening with a metal flange on the outside. An outlet pipe 46 with a closable extraction fitting for removing the mixed material from the bottom can be connected to this flange edge by means of a clamping ring connection. When not in use, the removal opening in the floor can be closed with a blind plug in order to be able to use a standard inliner sack without a floor outlet. When the floor outlet is used, a corresponding thin-walled inliner hose is welded into the inliner floor 22, which is inserted through the outlet pipe 46 and the outer end of the hose then through a further small clamping ring between the outlet pipe 46 and Withdrawal fitting nozzle is jammed liquid-tight. The mixing container 10 with the connected bottom outlet pipe 46 and extraction fitting is expediently on a caster (not shown).

In a preferred embodiment, the individual container components 12, 14, 18, 24, 26 are made of sheet steel and are all designed as standardized or standardized components from the usual steel barrel production. The standardized components for a steel barrel mixing container can be taken from the steel barrel production for a steel lidded barrel with a volume of 215 liters or a volume of 300 liters. Mixing containers of the type described can of course also be produced in other conventional volume sizes of 30, 60, 120, 150 or 250 liters.

For use of a mixing container in damp rooms, the cylindrical container wall 12 and the upper disk-shaped container lid 24 and the lower disk-shaped container base 14 can be made of plastic.

Another possibility is to design the cylindrical container wall 12 of a mixing container in a known manner from wrapped Kraft paper as a fiber drum with molded upper and lower rolled edges.

In Figure 11 a well-known Micro Matic flat fitting pipe for bung drums with 2 inch bung openings is shown as an example of a filling / removal pump pipe 56, which is expediently used with the upper container lid 24 open for filling and removal of the liquid mixture.

The preferred embodiment of the inliner sack 16 is shown in FIG Figure 12 shown. Here, the inliner base 22 welded to the cylindrical inliner wall 20 with a flange edge 36 has a square basic shape. Known inliner sacks, so-called round-bottom sacks, are generally produced by welding from a film tube with a predetermined diameter and a cut-to-size base disc with the same diameter. To do this, the cylindrical film tube is folded inwards and firmly welded to the bottom washer. The excess film material of the bottom disk that is not required is cut off and disposed of.

In the production of the inliner bags 16 according to the invention with a welded-on inliner bottom 22 and flange edge 36 with a square basic shape, with a corresponding film width, there is no waste or only a very narrow scrap strip.

With an inliner sack for a standardized 215 Itr. Steel barrel, the diameter of the cylindrical inliner wall, like the barrel diameter, is equal to 570 mm. The square inliner floor then has an edge length of 610 mm with an overhang of 2 × 20 mm. This results in a diagonal of 862 mm. Less the diameter of 570 mm, this results in a protrusion of 146 mm in the corners.

As in Figure 13 is illustrated in a schematic representation, an inliner sack 16 according to FIG Fig. 12 inserted into the mixing container 10. At the upper end of the mixing container 10, the inliner sack 16 protrudes with its cylindrical inliner wall beyond the upper rolled edge 30. At the lower end of the mixing container 10 you can see two raised corners of the square flange 36 with attached fixing means 60. In the present case, these fixing means 60 are designed as flat magnetic strips, by means of which the raised corners of the square flange 36 on the outside of the steel barrel or the container wall 12 are fixed in a resilient manner. In the case of mixing containers with non-magnetic container walls such as plastic barrels or fiber drums, elastic rubber bands can also be used as fixing means 60. In the case of stainless steel barrels, metal retaining clips can also be welded onto the lower container wall as fixing means.

In Figure 14 is in the enlarged view of a lower corner area of the mixing container 10 according to Fig. 13 once again illustrates why a wide or square flange edge 36 is so advantageous. The film thickness of the flange edge or the inliner sack is shown here with an exaggerated thickness for better illustration.

During the assembly of the inliner sack, the corners of the inliner base 22 are pulled over the base area 14 of the mixing container and fixed on the outside of the container wall 12 by magnets or clamping elements 60. If the bottom lid 14 of the mixing container is now placed on the container, the latter dipping into the container body and the rolled edge 28 of the container wall 12 being molded into the U-shaped circumferential groove 34 on the lid edge, the inliner base 22 spans the bottom lid 14 or Barrel bottom, being the free The protrusion of the square flange edge 36 is shortened in the direction of the container body. At the same time, the corners in the clamping points under the magnetic strip 60 slide in the direction of the container bottom 14. The whole is then fixed by means of the attached clamping ring 18. The mixing container is then rotated and the protruding inliner wall of the inliner sack is pulled over the upper edge of the container. To fix it, a clamping ring is also placed on the upper edge of the container and closed. A vacuum hose can then be connected through a small closable opening in the upper container wall and the air between the container wall and the liner bag can be sucked off. The inliner sack is then tightly fixed in the mixing container and the mixing container is ready for use. After using the mixing container, the inliner bag is dismantled in reverse order.

If a closed mixing container is to be used, a container lid with corresponding bung openings and a mixing tool inserted therein is placed on the container and fixed by means of the upper clamping ring. The container lid is provided on its underside with a corresponding inliner cover disk with a protruding flange edge. Only for assembly purposes, the inliner cover plate can selectively with a removable adhesive such. B. a double-sided tape or adhesive pads on the underside of the container lid. As soon as the container lid is placed on the container, the inliner cover disc pulls tightly over the container lid and is clamped by the attached upper clamping ring.

Conclusion:

The technical teaching of the present invention shows how a very inexpensive mixing container with inliner bag can be provided in a surprisingly simple manner, which, due to its detachable connection of the individual components, is quickly and inexpensively converted for constant use in new mixing processes and prepared for use again in an environmentally friendly manner can be.

The proposed construction of the mixing container according to the invention with the inliner sack fixed on the bottom circumference can of course also be used as a simple lid container for storing and transporting moist or liquid filling goods. Then the filling material can be safely sucked out of the container without the inliner sack getting into the suction opening and clogging it. The filling material can also just be poured out, the inliner sack remaining in the container and not falling into the pouring out filling material. <u> List of reference numbers </u> 10 Mixing tank 58 Welding area (20, 22) 12th cylindrical container wall (10) 60 Fixative (12, 36) 14th disc-shaped container bottom (10) 62 Peripheral edge (36) 16 thin-walled inliner sack A. large distance (20, 62) 18th lower tension ring (10) a small gap (20, 62) 20th cylindrical inliner wall (16) 22nd disc-shaped inliner floor (16) 24 upper container lid (10) 26th upper tension ring (10) 28 lower rolled edge (12) 30th top rolled edge (12) 32 semicircular outer edge (24) 34 semicircular outer edge (14) 36 lower flange (20, 22) 38 upper flange (22) 40 Trestle on wheels 42 220 liter frame 44 300 liter frame 46 Outlet pipe with fitting (14) 48 3 inch bung opening (24) 50 2 inch bung opening (24) 52 Agitator / Mixing Tool (24) 54 Flange clamping arrow 56 Filling / removal pump tube

Claims (14)

Mixing container (10) for mixing liquid or fluid filling goods, with a cylindrical container wall (12) and a lower disk-shaped container base (14), characterized by :
at least four individual, detachably interconnected container components, namely a cylindrical container wall (12), a lower disk-shaped container base (14), an inliner sack (16) made of thin-walled plastic film and a lower disk-shaped container base (14) inserted into the container wall (12) the clamping ring (18) connecting the container wall (12), the inserted inliner sack (16) having a cylindrical inliner wall (20) with a permanently welded disc-shaped inliner base (22), and the disc-shaped inliner base (22) with a flange edge (36) protruding beyond the cylindrical inliner wall (20) is provided which, in the inserted state, is arranged on the circumference between the lower disk-shaped container base (14) and the lower edge of the container wall (12) and is supported by the attached lower clamping ring (18) is clamped firmly and twist-proof. Mixing container (10) according to claim 1, characterized in that on the four individual, detachably connected container components (12, 14, 16, 18) an upper disk-shaped container lid (24) and a second, the upper container lid (24) with an upper one The rolled edge (30) of the container wall (12) connecting the upper clamping ring (26) is placed. Mixing container (10) according to Claim 1 or 2, characterized in that the inliner sack (16) has a piece of cylindrical inliner protruding upwards over the upper rolled edge (30) of the cylindrical container wall (12) on the upper edge of its cylindrical inliner wall (20) -Wall which, in the inserted state, is turned over to the outside over the upper rolled edge (30) of the container wall (12) and is fixed firmly and securely against rotation by means of the upper clamping ring (26). Mixing container (10) according to claim 1, 2 or 3, characterized in that the inliner sack (16) has an outwardly protruding flange edge (38) on the upper edge of its cylindrical inliner wall (20), which in the inserted state between the upper rolled edge (30) of the container wall (12) and the upper disk-shaped container lid (28) and is clamped firmly and non-rotatably by the upper clamping ring (26). Mixing container (10) according to claim 1, 2, 3 or 4, characterized in that a separate disc-shaped inliner film is arranged on the underside of the upper container lid (24), the diameter of which is at least as large as the outer diameter of the upper container lid (24) is, wherein the outer edge of the disc-shaped inliner film is arranged between the outer edge of the upper container lid (24) and the upper rolled edge (30) of the cylindrical container wall (12) and is clamped firmly and non-rotatably by means of the upper clamping ring (26). Mixing container (10) according to claim 1, 2, 3, 4 or 5, characterized in that the upper container cover (24) has at least one bung opening (48, 50) which can be closed by means of bung plugs and into which a stirrer / mixing tool (52) can be inserted . Mixing container (10) according to one of the preceding claims 1 to 6, characterized in that the individual container components namely cylindrical container wall (12), lower disk-shaped container base (14), lower clamping ring (18), upper disk-shaped container lid (24) and upper clamping ring ( 26) are made of sheet steel and are all designed as standardized or standardized components from the usual steel barrel production. Mixing container (10) according to one of the preceding claims 1 to 7, characterized in that the cylindrical container wall (12) made of plastic or wrapped Kraft paper (= fiber drum) and the upper disk-shaped container lid (24) and / or the lower disk-shaped container base (14) made of plastic or plywood. Inliner sack (16) made of thin-walled plastic film with a cylindrical inliner wall (20) and a permanently welded disc-shaped inliner base (22) for insertion into a mixing container (10) according to at least one of the preceding claims 1 to 8, characterized in that the disc-shaped inliner base (22) has a flange edge (36) projecting beyond the diameter of the cylindrical inliner wall (20) and having a width of at least 10 mm. Inliner sack according to Claim 9, characterized in that the cylindrical inliner wall (20) additionally has an outwardly protruding flange edge (38) with a width of at least 10 mm on the upper edge. Inliner sack according to claim 9 or 10, characterized in that the outer peripheral edge of the inliner base (22) welded to the cylindrical inliner wall (20) alternately has a larger and a smaller distance (A, a) from the cylindrical inliner wall ( 20). Inliner sack according to claim 9, 10 or 11, characterized in that the smaller distance (a) of the inliner base (22) welded to the cylindrical inliner wall (20) from the cylindrical inliner wall (20) to its outer peripheral edge has at least 20 mm. Inliner sack according to claim 9, 10, 11 or 12, characterized in that the greater distance (A) of the inliner base (22) welded to the cylindrical inliner wall (20) from the cylindrical inliner wall (20) to its outer peripheral edge has a maximum of 200 mm. Inliner sack according to Claim 9, 10, 11, 12 or 13, characterized in that the inliner base (22) welded to the cylindrical inliner wall (20) has a square basic shape.

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