EP1796981B1 - Container seal for the storage of dangerous liquid material - Google Patents

Abstract

Exemplary embodiments provide a seal between an open body end of a container body and an edge of a lid which is pressable into the open end of the body in a sealing manner, both made from sheet metal, wherein at the end of the body the sheet metal is bent outward by approximately 180° with a bending radius, the lid edge, which is separated from a lid surface by a channeled bead, extending axially upward with its radially external defining edge of the bead beyond an axial position of the lid surface and being bent outwards with a radius which is larger than the bending radius at the body end, to form a rolled edge for receiving an annular sealing material filling the rolled edge and extending downwards, wherein a sheet edge of the rolled edge terminates at a radial distance before the defining edge, said distance being dimensioned such that during the sealing process the body end, with the bending radius thereof in contact with the defining edge of the lid, may be inserted between the same and the sealing material into the interior of the rolled edge.

Description

The invention relates to a container made of sheet metal with a closure between the trunk end of the hull of the container and the edge of a depressed in the (previously open) torso end lid. The lid can be released again. Both parts consist of (relatively) thin sheet metal. We also propose a method for closing a closure edge between a previously open body end of a container body made of sheet metal and an edge of a sealed in the open torso end lid of sheet metal. The lid has a lid mirror (also made of sheet metal).

Showing a closure of a tin container WO 92/04248 A (Baltec ). In this closure, an intermediate ring is used which receives a sealing ring and which contributes to the mechanical securing of the engagement of the lid in the closed position. To further secure an adhesive is used between the cooperating sealing surfaces, which connects the compound.

The font WO 98/35882 (Glud ) and the writing DE 33 39 777 A1 (Carnaud ) show further container closures each with a Eindrückdeckel and a suitably shaped upper edge of the container body. Both should be reliably sealed even with multiple opening and closing, when the push-in lid is placed on the fuselage.

The object of the invention is to make the closure of the container meet high requirements, to make it easy and inexpensive to manufacture and in particular it is a particularly safe, even at high mechanical stresses, such as shock or case, tight seal for fluid hazardous goods in the closed container.

This object is achieved with claim 1 or 13 and solved.

Here, the Eindrückdeckel largely correspond to previous lid shapes, so that even existing manufacturing processes and manufacturing means remain largely applicable. Technical changes can be reduced to a minimum, which is a further advantage of the invention without affecting it to the detriment.

A high degree of tightness is inventively achieved by a (direct) interaction of the trunk end (end of the fuselage) and lid edge (edge of the lid), so that it requires no additional intermediate ring. In the area of a sharp Curvature (achieved by the bent in a narrow arc by 180 ° to the outside sheet metal) is the tail (directly or indirectly via a compound residual layer) on the cover plate (the boundary edge) - within its at least partially rolled-up edge (as rolled edge) - on and there can achieve a seal by direct, advantageous flat expansive, contact under mutual radial bias.

This area is at the same time covered radially on the outside by the sealing material (compound) arranged in the rolled edge of the lid, in particular formed as a bulking compound.

During a closing operation (closing), the fuselage end with its (relatively sharp) radius of curvature comes into contact with sealing material on the outside of the boundary edge of the cover.

Figur 1

zeigt die für den Verschluss wichtigen Teile von Deckel und offenem Rumpfende eines verschlossenen oder verschließbaren oder öffnungsfähigen Behälters, jeweils im axialen Schnitt und bei noch offenem Verschluss.

Figur 2

zeigt die Teile in gleicher Darstellung wie in Figur 1, jedoch in der Schließstellung.

Figur 3

zeigt ein weiteres Beispiel.

The invention will be explained and supplemented below with several exemplary embodiments

FIG. 1

shows the important parts for the closure of the lid and open torso end of a sealed or closable or openable container, respectively in the axial section and still open closure.

FIG. 2

shows the parts in the same representation as in FIG. 1 , but in the closed position.

FIG. 3

shows another example.

In the cover 1 associated with the closure, the edge of the lid (marginal section 1) is connected to the central lid mirror 3 via a relatively deep channel-shaped sipe 4, which is at e.g. mechanical shocks can also act as a damping bead. Its outer boundary edge 5 protrudes in the axial direction beyond the lid mirror 3 and merges into an outwardly bent roll edge 7 whose sheet metal edge 8 terminates at the (clear) radial distance in front of the upper section 5a of the boundary flank 5. The rolling edge has a sufficiently large radius of curvature, so that in it a sealing material 9 of sufficient volume can be accommodated, which extends over the lower opening gap d8 of the rolling edge 7 - a little way along the boundary edge 5 - down.

The jacket 2a, 10 of the container 2 (the hull) is bent to form the hull or container opening over a small radius of curvature 11 by 180 ° to the outside. The sheet 18 extends from the radius of curvature in the predetermined by the measure of the radius of curvature radial distance Δr parallel to the fuselage shell 10 axially down, in a L18, which exceeds the diameter d7 of the rolling edge 7 of the lid 1 significantly.

Subsequently, the sheet is bent to form a support shoulder 12 radially and axially rising outwards. At the outer edge of the support shoulder, the sheet is bent axially downwards and ends in a curl 13 of compared to the rolled edge 7 of the lid - or the diameter d11 of the small or sharp curvature 11 - large diameter, which is chosen such that the Roll-up 13 with its radially inner region adjacent to the fuselage wall 10 or even rests against this.

In a modification, the fuselage panel between the support shoulder 12 and the curl 13 - at least partially - be formed to an outwardly opening opening aid 16, as shown in dashed lines in FIG. 1 is shown as a highly protruding loop 16.

For mechanical securing of the engagement of the lid in the trunk end after closing, the fuselage wall 10 and the outer boundary edge 5 of the lid 1 each have a bead 15 or 14 or the like. Engagement element on.

FIG. 1 shows the lid in a position opposite the open trunk end immediately before the start of Eindrückvorganges according to the arrow 17. FIG. 2 shows the final closed position.

The open torso end 10 with the curvature 11 extends as far as possible, as far as the transition 6 between the outer boundary edge 5 and roll edge 7 of the lid, into the interior of the roll edge 7. The body shell 10 comes in (direct or indirect) contact with the outer boundary edge 5. This contact is extended flat along the walls 5 and 10 and takes place preferably under radial prestress, which in FIG. 2 is indicated schematically by the overlap of the sheet cut surfaces. A residual layer of Compound 9, which has been displaced here, can still be located on the outside. This is also a touching of the boundary edge 5 by the upper trunk end.

By this, taking place under bias contact a reliable seal by mechanical means between the two closure parts involved is already achieved.

FIG. 2 further illustrate that the radial distance of the sheet edge 8 is selected from the boundary edge 5 so large that on the one hand the container edge with curvature 11 can safely insert into the roll edge 7, and on the other hand, the sealing material 9 within the roll edge 7 and outside in the Supporting shoulder retains a reliably coherent cross-section. The sealing material is within the roll edge 7 and between this and the support shoulder 12 held under pressure, which significantly increases the sealing effect, so that the use of an adhesive in the region of the sealing surfaces is unnecessary.

The deep and wide bead channel 4, the large rolled edge 7, the radial distance between the wall sections 10 and 18, the inclined support shoulder 12 and the large-volume, at the fuselage wall 10 at least adjacent curl 13 together form a very effective cushioning and damping system that almost All possible mechanical pressure or impact loads that may act on the closure area from the outside are able to absorb safely without a sealing effect suffering from these stresses.

From the description and representation of the closure it is clear that the body end 10 with all the elements belonging to the shutter -11, 18, 12, 13 and optionally 16 - can be formed from a single sheet metal blank. An additional intermediate ring is not required.

The lid can be produced largely by known methods and means. The entire closure is therefore simple and inexpensive to produce and ensures excellent stability and tightness, so that it can also be used in containers for hazardous materials.

In a further embodiment according to FIG. 3 can be explained on the non-sealed (at the beginning of the closing process) state after - FIG. 1 - to get expelled. Also the locked state after FIG. 2 can on FIG. 3 be transmitted, not shown separately here.

The modification to the previously described embodiments is in the fuselage bead 15, which is formed as a bead 15 'more clearly radially outwardly to take on the Ringeinrollung 13 a supporting influence. The Ringeinrollung is after FIG. 1 formed adjacent to the container body 10 (the upper body portion of the container body 2), in particular fitting. If the bead 15 is displaced axially higher, the result is also a radial support of the curl 13, for additional stabilization of the position of the support shoulder 12, possibly also of the opening aid 16, in an even further exemplary embodiment (dashed line) ,

The hull or container bead 15 'can also be formed axially longer, as are formed axially more compact, for example, as FIG. 1 verna shows.

The in the bead 15 'engaging portion 14' of the lid is formed accordingly to be formed in the closing state in the bead 15 'for positive and / or kraftschlossigen intervention. An at least partially planar support also results here, wherein the axial upward pressure of the bead 14 'in the lid can be used in addition to supporting the bead 15' in the container, which two beads together the ring roll 13 are able to support radially inward and axially down.

The result is a composite of support beads and curls, which come together from all the components involved in the closure area.

Claims (13)

1. Container from sheet metal having a seal between a body end of the container and an edge of a lid (1), made from sheet metal having a panel (3), which lid is pressed into the body end in a sealing manner, wherein

   - at the body end, the sheet metal is bent outward by 180° in a close curve with a radius of curvature (d11) forming a relative sharp curvature portion (11),

   - the lid edge, which is separated from the lid surface (3) by a channelled bead (4), extending axially upward beyond the lid surface (3) as a radially external defining edge (5) and being bent outwards with a radius which is substantially larger than the bending radius (d11) of the relative sharp curvature portion (11) at the body end, to form a rolled edge (7), wherein an annular sealing material (9) is provided filling the rolled edge and extending axially downwards, which is held by a free sheet edge (8) of the rolled edge (7), and wherein the free sheet edge (8) has a radial distance (d8) from the defining edge (5), said distance being dimensioned such that during the sealing process of the seal the body end, with the bending region (11) thereof bent outward in a tight bend by 180°, in contact with the defining edge (5) of the lid (1), is inserted between this edge (5) and the sealing material (9) held by the free edge (8), past the free edge (9) into the interior of the rolled edge (7).
2. Container with a seal according to claim 1, wherein the diameter of the open body end in the area of the tight bend (11) with the bending radius (d11) and a lid edge diameter in the area of a transition (6) from the defining edge (5) to the rolled edge (7) are matched such that the body end will abut, in its closed position, with its bend arc as bending area (11) at a transition (6) between the defining edge (5) and the rolled edge (7), while being under a radially inward preload.
3. Container with a seal according to claim 1 or 2, wherein the sealing material (9) is a swelling compound.
4. Container according to one of the preceding claims, wherein the sheet metal of the body (2) extends from the small bending radius (11) axially downward (L18), at a radial distance and approximately in parallel with the body wall, in particular extending beyond the lower edge of the rolled edge (7), or further than the diameter (d7) of the rolled edge, and wherein the body sheet metal is subsequently bent radially, thus forming a support shoulder (12) for supporting the sealing material (9) in the closed position.
5. Container according to claim 4, wherein a shoulder surface (12) is provided rising radially outward and slanted upward.
6. Container according to claims 1, 4 or 5, wherein the body sheet metal is bent axially downward from the peripheral radial end of the, or a support shoulder (12), and then being rolled in radially inward (13), wherein a bending radius of this roll-in (13) is selected such that the roll-in is outwardly adjacent to the body end or abuts against it, in particular against a radial circumferential protrusion (15) of the body or of the body wall (10, 2a).
7. Container according to claims 4, 5, or 6, wherein the body sheet metal between the support shoulder (12) and the, or a roll-in (13) is formed into a radially and/or axially protruding lug (16), in particular as an opening aid.
8. Container according to one of the preceding claims, characterized in that the body end and all body-side elements (11,18,12,13,16) of the seal are integrally formed from the same sheet metal blank.
9. Container according to one of the preceding claims, wherein the lid (1) and the body end (2,10) are held in the closed position through a positively locking engagement of in particular circumferential corrugations or beads (14,15) in the outer defining edge (5) and in the body sheet metal (10) in a positively locking and/or frictionally locking manner, wherein both areas rest against each other with their surfaces in one radial dimension under a radial preload.
10. Container according to one of the preceding claims, wherein during the sealing process, the body end (10,11) with its bending radius (11) enters into contact with the sealing material (9) on the exterior of the defining edge (5) of the lid (1).
11. Container according to claim 1, wherein the holding is performed in a positively and frictionally locking manner.
12. Container according to claim 1, wherein a planar end (12) adjacent to the bending area (11) transitions into a roll-in (13) resting on the exterior of the container body, which roll-in is supported in particular on a body corrugation or bead (15,15').
13. Method for sealing a sealing edge between an open body end of a container body (2) made from sheet metal, and an edge of a lid (1) made from sheet metal which can be inserted into the open end of the body in a sealing manner, wherein the sheet metal is bent outward at the body end by essentially 180° and forming a sharp bend, wherein the lid edge is bent radially outward with a radius which compared thereto is significantly larger while forming a rolled edge (7), the rolled edge with a free end (8), receiving an annular sealing material (9) filling the rolled edge and extending axially downward, wherein the free edge (8) of the rolled edge (7) ends at a radial distance (d8) from the defining edge (5) of the lid, such that during the sealing process of the sealing edge, the body end bent outwards by 180° with its tight curvature (11) can be inserted into the interior of the rolled edge (7) of the lid (1) past the free sheet metal edge (8).

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