EP2321190B1 - Container having a lid - Google Patents

Abstract

The invention relates to a lidded container for storing and transporting in particular hazardous liquid fill goods, including an outer container body, an upper container lid and an inserted thin-walled inliner. The container lid has at least one filling and emptying opening that can be closed in a gas and liquid tight manner and that, for example, can be attached by means of a U-shaped tension ring closure or without tension ring as a snap cover by means of snap closure or a screw cap by means of screw closure on the upper container opening of the container body on a correspondingly designed flange edge. The thin-walled inliner (26) is fixed on the bottom side of the container lid (14) in the outer peripheral region in a gas and liquid tight manner, wherein the container lid (14) and inliner (26) form a gas and liquid tight hollow body unit. The container body, which can be used multiple times, is only provided as a support and protection unit for the inliner.

Description

The invention relates to a lid container for storage and transport of particularly dangerous liquid products, with an outer container body, with an upper container lid and a thin-walled inliner used. The container lid has at least one gas and liquid-tight sealable filling and emptying opening and z. B. by means of U-shaped clamping ring closure or without clamping ring as a snap lid by means of snap closure or as a screw cap by means of screw cap on the upper container opening of the container body to be fixed to a correspondingly formed flange edge.

State of the art :

Usually liquids, especially dangerous liquids such as chemicals or the like are filled in steel or plastic bung casks.

These steel or plastic bung drums have a special UN approval to allow hazardous liquids to be transported and stored. In order to obtain a UN approval for drums, they must undergo certain tests (eg diagonal drop test, cold drop test, internal pressure test, compression pressure test, etc.) and fulfill particularly high performance requirements.

There are already some lidded jars with UN approval, which may only be used for less dangerous liquids, because a lidded drum (Open Top Drum) understandably not reach the high drop resistance and internal pressure resistance as a bung drum (Closed Head Drum).

Furthermore, a use of thin-walled liners (film bags) in lidded drums is well known, such. B. from the DE-A 1009101 . DE-A 4321550 or DE-A-41 24 208

It has even tried to bung barrels with inliners, such. B. from the DE 4007617 or EP-B 0 501 015 got known. Such inliners are generally used to avoid contamination of the container body and thereby allow reuse or multiple use of the outer container. In lidded drums, the inliners are always fastened in the mouth area or on the outer edge of the lidded container; In the case of bung casks, the inliners for attachment within the bung opening of the barrel usually have special fastening sleeves at the filling and emptying opening. However, the use of plastic inliners in bung casks and the subsequent removal is extremely complicated and expensive and has not been proven in practice.

A lid container according to the preamble of entitlement 1 is known from DE-A1-39 08 099 known.

Problem: The invention is based on the recognition that usual filled lidded container - even with inserted liners - only to a limited extent dangerous

Liquids can be used because they are exposed in case of container crashes - especially in a critical diagonal case - in the connecting region of the outer container body and upper container lid high loads - especially in plastic lid drums with steel clamping ring closure - often lead to leaks and thus the application of Limit lidded drums to non-hazardous particulate or pasty contents.

It is an object of the present invention to overcome these disadvantages of the prior art and to provide a lid container whose tightness behavior is improved even at higher or critical load cases, and for - compared to conventional lidded drums - a higher UN approval can be achieved. Furthermore, the field of application of this lid container is to be expanded with regard to hazardous liquid contents, taking into account economic and ecological aspects and a cost-effective reuse of the outer container body.

This object is achieved according to a lid container according to claim 1 by.

In this way, a completely closed container for receiving the liquid filling material is created, which consists in terms of liquid tightness of the two essential parts inliner and container lid, which are inextricably gas- and liquid-tightly interconnected. The filling and emptying takes place exclusively via one or two small bung openings (eg 2 inch opening) in the container lid, which are closed by gas or liquid tight by means of appropriate screw cap or bung plug.

The lower container body is in this case no longer directly involved in the sealing of the liquid filling material and has essentially only to fulfill a supporting function. Since the container body with the liquid product is no longer in contact, it is ideal for multiple use. The container body can be made of thermoplastic material (eg HD-PE) and can be produced by injection molding, by blow molding or by rotary molding. The container body may also be made of metal (eg steel sheet) or wound kraft paper (cardboard drum, fiber drum) consist.

In the case of container crashes, small deformations of the clamping ring and lid edge or container mouth do not immediately lead to leaks with leakage of liquid, as long as the inner liner is not damaged. The lid container according to the invention now also resists considerably higher internal pressures than conventional lidded drums, as the liquid-tight seal to the container interior no longer has a sealing ring inserted at the outer circumference relative to the large-diameter container opening, but only at the substantially smaller bung closure Inch) or screw cap (eg 150 mm diameter) inside the container lid. Due to the significantly better tightness behavior is possible that higher-quality UN approvals - can be achieved - even for dangerous liquid products.

Bung casks made of thermoplastic material have z. As in hot filling of liquid chemicals (with process heat) the disadvantage that the closed barrels are subject to subsequent internal cooling of the filling an internal negative pressure (vacuum) and thus often form lateral denting of the barrel wall. This is particularly critical for stacked bung barrels in terms of barrel crashes due to stacking. In the plastic lidded drum according to the invention with welded inliner this disadvantageous effect no longer occurs because the clamping ring closure of barrel lid and barrel body is now just no longer gas and liquid tight, but the inliner can move easily after hot filling and compensate for a vacuum without this has an effect on the shape or shape and thus on the stack load capacity of the outer drum body and the drum lid.

According to the invention it is provided that the container lid is made of thermoplastic material and is produced by injection molding or blow molding, and that the inliner in the outer peripheral region of the container lid insoluble gas-tight and liquid-tight welded or glued. If the liner and the container lid are both made of plastic, it is preferable to weld the inliner to each other on the edge of the container lid.

In an advantageous embodiment variant of the invention drum body, drum cover and welded inliner equally made of thermoplastic material (HD-PE), the drum lid is fixed with laterally arranged in the cover disc bung opening by means of a steel clamping ring on the barrel body. This preferred embodiment is - provided with appropriate UN approval - as a substitute for normal plastic bung casks, usually for storage and the transport of dangerous liquid products are used. With multiple use of the cylindrical cover barrel body such a packaging unit is cheaper than a comparable bung barrel.

Of course, the lid container according to the invention can also be used for solid, particulate or viscous, pasty products, as long as they can be sucked like liquids with a filling tube through the filling and emptying opening in the container lid and sucked out of the lid container by suction.

According to the invention it is provided that the container lid has a downwardly open U-shaped edge with a vertical outer and a vertical inner cover flange, and that the inliner is externally welded or glued to the inner cover flange. Here, the inliner is fixed in a vertical mounting area on the drum lid. Advantageously, the inner cover flange is formed extended and thereby provides a wider welding zone.

In a further embodiment of the invention it is provided that the inliner has at its upper end an outwardly shaped edge in the manner of a radial flange, which is welded or glued in the opposite end face of the container mouth U-shaped lid edge. Here, the attachment area is aligned more in the horizontal direction. In this case, the inliner edge extends into the contact surface of the drum lid and is there, so to speak, additionally pinched. On the one hand, this counteracts damaging tensile loads and prevents "rattling" of the drum lid, since conventional lid-sized sealing rings in the lid rim or on the mouth of the drum can be dispensed with in the lidding drum according to the invention.

The inliner is usually formed as a cylindrical foil bag and made of thermoplastic material. In this case, the liquid-tight inliner for reinforcement can be equipped with a fabric insert.

Figur 1

einen erfindungsgemäßen Deckelbehälter in perspektivischer Ansicht,

Figur 2

einen Querschnitt durch den Deckelbehälter mit Inliner gemäß Fig. 1,

Figur 3

einen Querschnitt durch den Behälterkörper ohne Inliner,

Figur 4

eine Draufsicht auf den Behälterdeckel,

Figur 5

ausschnittsweise einen vergrößerten Querschnitt des Deckelbehälters.

Advantageously, the inliner may be formed at its upper edge thickened in its mounting region and have a wall thickness of at least 1 mm. To prevent twisting of the inliner in the barrel body, the inliner in with a plurality of vertically extending stiffening ribs be equipped. The invention will be explained and described in more detail with reference to embodiments schematically illustrated in the drawings. Show it :

FIG. 1

a lid container according to the invention in a perspective view,

FIG. 2

a cross section through the lid container with inliner according to Fig. 1 .

FIG. 3

a cross section through the container body without inliner,

FIG. 4

a top view of the container lid,

FIG. 5

partially an enlarged cross-section of the lid container.

In FIG. 1 Reference numeral 10 designates a lid container according to the invention in a preferred embodiment as a fully cylindrical 220 liter lidded barrel, which shows a container body 12 with attached container lid 14 and clamping ring closure 16. The container lid 14 has a central flat cover disc 18 with therein, diametrically opposed bung openings and a U-shaped, downwardly open lid rim 20 with an outer ring piece 22 and an inner ring piece 24 ( Fig. 5 ). The central cover plate 18 is slightly raised compared to a flat, outer circumferential annular disc 32.

In the transition region from the outer ring disk 32 to the central cover plate 18 are two diametrically opposite, each with a bung stopper 38 gas and liquid tight closable bung holes sunk in small Spundmulden sunk that in the closed state, the surface of the screwed bung stopper 38 with the surface of the attached clamping ring 16 and the central cover plate 18 lie in a height plane.

At the bottom of the container body 12 is a massively shaped circumferential bottom roll ring or foot ring 40 is arranged for better stability, and higher stability and Abrollbarkeit of the filled barrel in tilted oblique positioning.

The clamping ring 16 engages with its upper leg the U-shaped lid edge 20 and with its lower leg a top of the container opening 36 on the outer wall of the container body 12 arranged substantially radially outwardly projecting Mantelflansch 34 and presses the container lid 14 to the container opening 36th ,

FIG. 2 shows the barrel lid 14 in plan view. Here are two opposing bung holes in the lid with 2-inch bung stopper 38 gas and liquid sealed. On the outside in the flat annular disc 32 and inside directly behind the U-shaped lid edge a plurality of stacking cams 28 are provided in the form of ring land sections. These stacking cams 28 are more similar when stacked

Drums form fit in the inside behind the bottom roll ring 40 (foot ring) arranged engagement groove 30 and prevent z. As in transport shocks lateral slipping of stacked barrels.

In FIG. 3 is the container body or a barrel body 12 with upper filler opening 36, with upper shell flange 34 as a clamping ring abutment, and bottom-side foot ring 40 shown in cross-sectional view. Directly behind the foot ring 40, the engagement groove 30 is formed in the shallow barrel bottom.

FIG. 4 shows the fully cylindrical lidded barrel 10 as a preferred embodiment of the invention with barrel body 12, with attached barrel lid 14 and welded to the barrel lid 14 plastic inliner 26. The lidded barrel has a capacity of about 220 liters and 55 US gallons. With a height of 890 mm and an outer diameter of 585 mm, it has almost the same dimensions as a corresponding steel drum and can be handled with the same steel barrel drum gripper tools.

The drum lid 14 is made by injection molding of new plastic material (HD-PE virgin material). The inliner 26 is also made of new plastic material (HD-PE) and can be produced by injection molding, by deep-drawing or composite film material. The inliner 26 can be designed as a cylindrical film bag single-layered or multi-layered and thereby have a wall thickness of 0.6 to 2 mm and a weight of about 1.2 to 3.4 kg. A multilayer inliner is preferably provided with a barrier layer (permeation barrier) against migration of hydrocarbons, carbon dioxide or oxygen. The gas- and liquid-tight inliner 26 may further be provided for reinforcement with a fabric insert and against torsional security within the barrel body with oblique rolling a filled barrel with stiffening ribs extending in the vertical direction. The drum body 12 may be made by injection molding or blow molding and may be made of virgin plastic (HD-PE) or recycled plastics material. With a wall thickness of about 2.5 to 5 mm, the weight of the barrel body of about 5.0 to 9.5 kg can be. By a multiple use of the drum body, the packaging costs, the consumption of virgin material and thus the material costs can be advantageously reduced, and it reduces the amount of waste material from used packaging containers.

The circle cutout "A" top left in Fig. 4 is in FIG. 5 shown as an enlarged partial cross-section. It can be seen that the inner ring piece 24 of the U-shaped lid rim 20 is formed extended so that it extends a whole distance in the container body opening 36 inside. The "immersion depth" of the ring piece 24 (= Height of the ring piece) can be between 10 and 60 mm. In a preferred embodiment, the smooth outer surface of the annular web 24 as a mounting portion 42 for welding or gluing the inliner a height of about 35 mm (measured from the inside of the annular disc 32), on which the inliner welded to the inside of its upper edge region or is glued on.

The welding or bonding takes place in at least one circumferential continuous line. It can also be provided two or more circumferential weld lines. If a plurality of weld lines are provided, preferably the bottom and top weld lines are linearly straight, while the or one of the center weld lines are also zigzag or wavy, so that a wider area at the top of the inliner is used for attachment Among other things, a better distribution of tensile forces is achieved. In particular, when gluing the liner in a wider circumferential, d. H. flat adhesive zone can be realized. Such an adhesive zone may be a height of about 5 mm to 40 mm, preferably about 15 mm.

When welded with at least two circumferential weld lines, the weld region may extend over a height of 10 mm to 50 mm, preferably about 20 mm. With a wider attachment area of the inliner locally excessive tensile loads can be better distributed and collected on a larger surface area, so that overstretching of the liner and a tearing of the weld joint between inliner and cover is avoided.

In FIG. 6 the container mouth and the container lid version are shown again in detail. Due to the fact that the flat annular disc 32, which adjoins directly behind the U-shaped edge of the lid, is located approximately 15 to 20 mm lower than the upper end edge 32 of the U-shaped lid rim, there is a circumferential engagement groove for use or for handling a filled lid container with conventional drum gripper tools (parrot beak) as it is used for common steel drums.

In the attachment region 42, the inliner preferably has a thickened edge for better welding or gluing. There, the wall thickness can be formed to twice as thick as the normal wall thickness of the liner (about 0.5 to 2 mm). The inliner can be configured in various ways. Thus it can be provided in one embodiment that the inliner 26 of a metal foil or a liquid-tight, with metal threads and plastic coated coated Fabric film exists. When used in the food industry, for. B. also be provided that the liner 26 consists of a multilayer plastic film and a barrier layer against permeation (penetration) of hydrocarbons.

The above-described welding or bonding in the vertical direction can be combined with the in-line attachment in the horizontal direction in the U-shaped lid edge, whereby a wider mounting area and an entrapment in the contact area of the U-shaped lid edge on the upper Fassmündungsrand in the clamping region of the clamping ring closure is effected.

In an inserted into the U-shaped lid edge 20 circumferential sealing ring can be completely dispensed with the lidded barrel according to the invention, because the container lid 14 with closed clamping ring 16 does not have to be sealed gas- and liquid-tight on the upper mouth edge of the container opening, since already the drum lid with the welded inliner forms an absolutely liquid-tight unit. While usual, filled with liquid lidding drums usually leaking in container drops already fall heights of 1.2 m, the lid container according to the invention remains even with larger drop heights still completely liquid-tight, as long as the clamping ring does not jump completely.

According to the invention, therefore, a liquid-tight lidded barrel is created in a simple manner, which is almost equal in performance to a closed one-piece bung barrel. The tightness of the lidded barrel according to the invention is substantially increased in case of container crashes and internal pressure loads, so that it is best suited for the use of liquid products and can even be approved for certain dangerous liquid contents.

The barrel body, which now only fulfills a purely protective function and no longer comes into contact with the contents and therefore has no adhering Füllgutreste after Füllgutentnahme, can be reused many times in material and environmentally friendly manner.

References list

10

Lid container

12

container body

14

container lid

16

clamping ring

18

central flat cover disc

20

U-shaped lid edge

22

outer ring piece (20) (= outer cover flange)

24

inner ring piece (20) (= inner cover flange)

26

Inliner (= cylindrical foil bag)

28

Cover web (14) (= stacking cam)

30

Engaging groove behind foot ring (40)

32

Annular disc (14)

34

Sheath flange (12)

36

Container opening (12)

38

bung plug

40

Foot ring (12)

42

attachment zone

Claims (9)

1. Lidded container (10) for storing and for transporting in particular hazardous liquid contents, having an outer container body (12), having an upper container lid (14) and having a thin-walled liner (26) inserted in the container, wherein the container lid (14) can be fixed on an appropriately formed flange periphery (34) on the upper container opening (36) of the container body (12) by means of a U-shaped clamping-ring closure (16) or, without a clamping ring, as a snap-fitting lid, by means of a snap-fitting closure or, as a screw-fitting lid, by means of a screw closure, wherein the container lid (14) consists of thermoplastic material and is produced by injection moulding or blow moulding and has at least one relatively small lid opening which can be closed in a gas-tight and liquid-tight manner by means of a closure lid (38) and through which the liquid contents can be introduced and removed, and wherein the thin-walled liner (26) is welded or adhesively bonded in a gas-tight and liquid-tight manner to the outer circumferential region of the underside of the container lid (14), wherein the container lid (14) and the liner (26) fixed thereon form a gas-tight and liquid-tight hollow-body unit, wherein the container lid (14) has a U-shaped periphery (20) which is open in the downward direction and has a vertical outer lid flange (22) and a vertical inner lid flange (24), characterized in that the liner (26) is welded or adhesively bonded, in a vertical fastening region, to the outside of the inner lid flange (24).
2. Lidded container according to Claim 1, characterized in that the container body (12), container lid (14) and welded-on liner (26) all consist of thermoplastic material (HDPE), wherein the container lid (14), with a bung opening arranged laterally in the central lid disc panel (18), is fastened on the container body (12) by means of a steel clamping ring (16).
3. Lidded container according to Claim 1 or 2, characterized in that the inner lid flange (24) is of extended design and thus provides a relatively wide fastening zone (42) for fixing the liner (26).
4. Lidded container according to Claim 1, 2 or 3, characterized in that the liner (26), at its upper end, has a periphery which is formed in the outward direction and is welded or adhesively bonded, in a horizontal fastening region, into the U-shaped lid periphery (20), which is located opposite the end surface of the container mouth.
5. Lidded container according to Claim 1, 2, 3 or 4, characterized in that the liner (26) is designed as a cylindrical sheet-material sack and is produced from thermoplastic material and is provided with a woven-fabric insert for reinforcing purposes.
6. Lidded container according to Claim 1, 2, 3, 4 or 5, characterized in that the liner (26), on its upper periphery, is of thickened design in the fastening region and has a wall thickness of at least 1 mm.
7. Lidded container according to one of preceding Claims 1 to 6, characterized in that the liner (26) is provided internally with vertically running stiffening ribs in order to prevent it from rotating.
8. Lidded container according to one of preceding Claims 1 to 7, characterized in that the liner (26) consists of a metal foil or of a liquid-tight plastics-coated woven-fabric sheet material which has metal filaments running through it.
9. Lidded container according to one of preceding Claims 1 to 8, characterized in that the liner (26) consists of a multilayered plastics sheet material and has a barrier layer to counter the permeation of hydrocarbons.

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