EP1993938B1 - Double-walled container - Google Patents
Double-walled container Download PDFInfo
- Publication number
- EP1993938B1 EP1993938B1 EP07712490A EP07712490A EP1993938B1 EP 1993938 B1 EP1993938 B1 EP 1993938B1 EP 07712490 A EP07712490 A EP 07712490A EP 07712490 A EP07712490 A EP 07712490A EP 1993938 B1 EP1993938 B1 EP 1993938B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- segment
- inner container
- container
- segments
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/028—Wall construction hollow-walled, e.g. double-walled with spacers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/02—Large containers rigid
- B65D88/06—Large containers rigid cylindrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/027—Corrugated or zig-zag structures; Folded plate
Definitions
- the invention relates to a method for producing a double-walled container in which an outer container is arranged around an inner container having a cylindrical hollow portion.
- a method according to the preamble of claim 1 is known from the document EP-A-0 764 596 known.
- the object of the invention is to provide a simple and inexpensive method for producing a double-walled container.
- a double-walled container according to the invention is simple and inexpensive to manufacture and can be easily formed so that it has a compressive strength against both increased internal pressure and external pressure having.
- the first segment and the second segment may have the same shape, whereby only one mold is required for producing these two segments.
- the two segments can be easily assembled by a preferably circumferential weld or adhesive joint, whereby their position can already be fixed to each other by arranging the segments around the inner container.
- a third segment can be provided, which is preferably made of a matching in its shape with the first and second segment molding. Specifically, a portion of a molding having the shape of the first and second segments is cut off to make the third segment.
- relatively large-volume containers in particular tanks, can be produced in a simple manner and inexpensively by producing a plurality of identical shaped articles of the same shape and dimensions, which serve as segments and / or from which the segments are produced.
- the length of the outer container can be easily extended in a simple manner by inexpensive to produce segments of the same shape, which can be produced in a cost-effective manner containers of different lengths.
- a blow-molded part or a molded part produced in a roll-forming process is separated such that a first severed area serves as a first or second segment and a second severed area serves as a segment for producing an inner vessel assembled from at least two segments ,
- a double-walled container can be formed by suitable design in particular of the segments as a pressure-resistant container, whereby a pressure-resistant double-walled container with a relatively low cost of materials can be produced.
- the cylindrical portion of the inner container and the cylindrical portions of the segments of the outer container are preferably in the shape of a circular cylinder.
- other cylinder cross sections in particular elliptical, oval, triangular, quadrangular, pentagonal, hexagonal, octagonal and other polygonal cross sections are possible.
- FIG. 1 is a sectional view of a side view of a pressure-resistant double-walled container 10 is shown.
- An inner container 12 has a substantially cylindrical portion 14 and two rounded portions 16, 18 which are arranged on the base or top surface of the cylindrical portion 14 and form together with it the tank-shaped inner container 12.
- the rounded portions 16, 18 are made in the manner of a container bottom and may have other shapes in other embodiments.
- An outer container 20 is composed of a first segment 22 and a second segment 24 which are interconnected at a junction 26 by means of a welded joint.
- the first segment 22 and the second segment 24 have each been produced as a blow molding piece in one piece from plastic with the same mold.
- the blow moldings of the first segment 22 and the second segment 24 each have a circular opening into each of which a portion of the inner container 12 is inserted.
- the circular opening substantially coincides with the outer cross section of the inner container 12.
- the outer cross section of the inner container 12 is slightly larger than the openings of the segments 22, 24, so that a frictional connection between the inner container 12 and the segments 22, 24 is generated when inserting the same.
- the segment 22 has annular stiffening elements 23a to 23j and the second segment has annular stiffening elements 25a to 25j.
- These annular stiffening elements, generally designated 23, 25, are formed by the wall in the form of an axially extending wave profile of the respective segment 22, 24.
- These annular stiffening elements 23, 25 act like side-by-side cassettes.
- the voltage applied to the outside of the inner container 12 areas of the stiffening elements 23, 25 are narrower than the projecting from the outside of the inner container 12 areas. Due to the curvature of the stiffening elements seen in the axial direction of the slope of the wall of the protruding portions of the adjacent areas is relatively steep, so that each stiffening element 23, 25 forms two disc-shaped stiffening rings that can accommodate a relatively large force and the double-walled container 10 is a relative give great deformation stiffness.
- the cylindrical portion 14 of the inner container 12 is thereby protected from deformations as a result of a medium filled in the inner container 12 and against forces acting on the double-walled container 10 from the outside. As a result, the double-walled container 10 can be acted upon from both inside and outside with relatively high pressure with relatively small wall thicknesses of the inner container 12 and the outer container 20.
- a circumferentially completely circumferential weld joint 28 is provided, which connects the segment 22 with the segment 24.
- the segments 22, 24 may be connected at their junction 26 by means of an adhesive bond with each other and / or with the outside of the inner container 12.
- Each segment 22, 24 encloses a portion of the cylindrical portion of the inner container 12.
- FIG. 2 is a section of the welded joint 28 after FIG. 1 according to a first embodiment for connecting the segments 22, 24 shown.
- the end faces of the opposite side walls of the segments 22, 24 in the region of their connection point 26 are beveled such that they form a V-shaped groove.
- the walls of the segments 22, 24 are in the region of the outside of the inner container 12 are arranged so that they touch or nearly touch each other.
- the thus formed V-shaped groove is used as a welding groove for a running in the direction of rotation weld 28 between the segments 22, 24.
- a connection between the outer container 20 and the outside of the inner container 12 via the welded joint 28 does not take place.
- the container 10 is also double-walled at the connection point 26.
- FIG. 3 is a junction 26a between contiguous segments 22a, 24a similar to the junction 26 for connecting the segments 22, 24 to the FIGS. 1 and 2 shown.
- the end faces of the walls of the segments 22a, 24a in the connecting region 26a are chamfered in the same way as the end faces of the segments 22, 24 after FIG. 2 .
- the segments 22a, 24a are in the assembled state of the double-walled container 10, in contrast to the junction 26 on the outer surface of the inner container 12 at a distance from each other, so that a widened groove between the segments 22a, 24a is present at the junction 26a.
- a length compensation can take place when the double-walled container 10 is assembled with the aid of the spacing between the segments 22a, 24a at the connection point 26a.
- more filler material can be supplied to the weld seam 28a, whereby a larger amount of liquid material is available in the connection area between the segments 22a, 24a during the welding process and too rapid cooling of the filler material and the fused areas of the segments 22a, 24a is avoided, so that a high-quality welded joint 28a can be produced in a simple manner.
- the weld joint 28 a a connection between the outer container 20 and the outer side of the inner container 12 is further generated.
- a release layer may be introduced between the outside of the inner container 12 and the weld 28a of a suitable material or by means of any suitable means to prevent immediate bonding of the filler material supplied to make the weld 28a to the outside of the inner container 12.
- a material or agent for a release layer may also be applied to the outer surface of the inner container 12 at the junction 26 FIG. 2 are introduced to securely prevent connection of the outer container 20 with the inner container 12.
- FIG. 4 is a sectional view of a junction 26b between two segments 22b, 24b shown by means of a welded joint 28b according to a third embodiment of the invention.
- the segments 22b and 24b of the outer container 20b and the segments of an inner container 12b composed of two segments are connected to each other by the welded joint 28b.
- the junction 28b is similar to the junctions 26, 26a of FIGS FIGS. 2 and 3 executed.
- two segments 13 of the inner container 12 and the two segments 22, 24 of the outer container 20 are arranged at the junction 26b so that a single common V-shaped groove between the segments 22b, 24b of the outer Container 20 and the segments 13 of the inner container 12 b is generated.
- both a connection is created between the segments 22a, 24b of the outer container 20 and between the segments of the inner container 12b.
- the inner container 12b and the outer container 20 are directly connected to each other.
- FIG. 3 is a sectional view of a blow molding member 29 including regions for forming the segment 22 of the outer container 20 and a segment 13 of the inner container 12.
- the segment 22 has at least in the cylindrical portion 14 of the inner container 12 a waveform through which the above-described annular stiffening elements 23a to 23j are formed around the cylindrical portion 14 around.
- This wavy configuration of the walls of the segments 22, 24 is also referred to as a corrugated tube profile, whereby the double-walled container 10 from an inner container 12 with a smooth outer surface and preferably a smooth inner surface and an outer container 22 at least in the region of the cylindrical portion 14 of inner container 12 corrugated outer wall is made.
- the segments 22, 24 are each pushed immediately after their preparation in a blow molding or alternatively a rotational molding process prior to complete cooling on the already cooled inner container 12 or alternatively on an already cooled segment 13 of the inner container 12. As the segments 22, 24 cool, they shrink so that the segments 22, 24 contract. The outer surface of the inner container 12 and the segment 13 facing areas of the corrugated wall of the segments 22, 24 are pressed by the shrinking process of the segments 22, 24 to the outside of the inner container 12 and the segment 13, so that a frictional connection between the segments 22, 24 and the inner container 12 is generated by the unwanted displacement the segments 22, 24, for example, during the welding operation for producing the welded joint 28, 28a, 28b, is prevented.
- FIG. 6 shows a sectional view of the segment 22 and the segment 13 of the inner container 12.
- the segment 13 of the inner container 12 is inserted into the opening 21 of the segment 22.
- the opening 21 has substantially the same cross section as the cross section of the joined state of the double-walled container 10 on the outside of the inner container 12 adjacent portions of the corrugated wall of the segment 22.
- Such in the assembled state of the double-walled container 10 on the outside of the inner Container 12 abutting portion of the segment 22 is in FIG. 6 designated 30.
- both the cylindrical portion 14 of the inner container 12 and the segments 22, 24 have circular cross sections, wherein the diameter of the opening 21 with the diameters of the adjacent regions 30 matches, of which a diameter is provided with the reference numeral 32.
- FIG. 7 is schematically illustrated with the aid of arrows P2 and P3, that when joining the segment 22 of the outer container 20 and the segment 13 of the inner container 12 hot air between the inner container 12 and the segment 22 is blown to the insertion of the inner container 12 in to facilitate the segment 22, since the deformability of the segments 13, 22 is improved by the hot air.
- the segment 22 there is provided an opening 34 with a suction port 35 to which a negative pressure relative to the ambient pressure is applied, which facilitates the insertion of the inner container 12 into the segment 22 and through which the between the outside of the segment 13 and the inside of the segment 22 blown hot air is discharged, so that more hot air in the direction of the arrows P2 and P3 can be supplied.
- the intake manifold 35 is preferably formed during the molding process of the segment 22 with. Alternatively, the intake manifold 35 and its opening 34 through the wall of the segment 22 subsequently on or introduced.
- FIG. 8 is a sectional view of the cross section of the segment 22 and the inner container 12 along the section line BB after FIG. 7 shown.
- the segment 13 of the inner container 12 is curved inward in the portion of the cylindrical portion 14, whereby the cross-sectional area of the segment 13 is reduced and the segment 13 can be easily inserted into the opening 21 of the segment 22.
- the inwardly curved region is also referred to below as concavity 36.
- the concavity 36 of the inner container 12 in particular in the areas 38, 40, 42 spaces between the adjacent areas 30 of the segment 22 and the outside of the segment 13 during the assembly of the segments 13, 22 are formed, in which the hot air can be injected .
- the concavity 36 can be pushed outward, thereby eliminating the concavity 36 and then having the inner container 12 in the cylindrical portion 14 of circular cross-section.
- the inner container 12 preferably has a slightly larger outer cross-section than the inner diameter of the abutting in the cylindrical portion 14 portions 30 of the outer container 20.
- a second similar segment of the inner container 12 is inserted into the segment 24 ,
- the contiguous segments 22, 24 are welded together at their junction 26.
- the segments 22, 24 can also be welded to the inner container 12, preferably to the outer side of the inner container 12.
- the segments 13 of the inner container 12 may be welded to the inner container 12, respectively, with the segments 22, 24 prior to their assembly.
- the segments 13 of the inner container can each be inserted separately into the segments 22, 24 of the outer container 20 and then connected by means of a common weld both with each other and with the segments 22, 24 with relatively little effort.
- the vacuum can also be applied only after blowing the hot air, which then sucked at least a portion of the injected hot air through the vacuum and the cooling process is accelerated.
- the individual segments 13 for producing the inner container 12 and the outer container 20 can be produced in a rotational molding process, in particular a rotational casting process.
- the segments 20, 24 of the outer container 20 and the inner container 12 and the segments 13 of the inner container 12 may be made of a thermoplastic or a thermosetting material. In other embodiments, the segments 22, 24 are made of a different material than the inner container 12.
- an adhesive connection between the segments 22, 24 and / or between the segments 22, 24 and the outside of the inner container 12 may be provided.
- the inner container 12 may be composed of at least two segments 13, which are connected by means of an adhesive connection with each other.
- the double-walled container 10 has at least one filling and / or removal opening.
- the filling and / or removal opening is preferably designed as a dome.
- the segments 22, 24 may preferably be annularly separated in a region 30 adjacent to the outer wall of the inner container 12, whereby further segments for extending the region of the outer container 20 enclosing the cylindrical region 14 of the inner container 12 may be produced.
- this may be composed of a plurality of cylindrical short sections. These sections are then linked together.
- FIG. 8 described embodiment may also have at least a portion of the cylindrical portion 14 of the inner container 12 in an integrally manufactured inner container 12 or already connected segments of the inner container 12 has a concavity 36.
- a molded part can be produced, from which a segment 13 for producing the inner container 12 and a segment 22, 24 for producing the outer container 20 are produced by dividing the molded part.
- only one mold is needed to make the inner and outer containers.
- the tool costs can be significantly reduced compared to known manufacturing processes.
- the cylindrical portion 14 of the inner container 12, 12a as well as the cylindrical portion 14 of the inner container 12, 12a surrounding portions of the segments 22, 24, 22a, 24a, 22b, 24b of the outer container 20 preferably have the shape of a circular cylinder or the Lateral surface of a circular cylinder.
- other cross-sectional shapes of the cylindrical portions and the openings of the segments 22, 24, 22a, 24a, 22b, 24b, in each of which a portion of the inner container 12 is inserted are provided.
- Such cross-sectional shapes are, for example, elliptical, oval, triangular, quadrangular, pentagonal, hexagonal and other polygonal and further at least one parabolic section comprehensive cross-sections.
- the lateral surfaces of the cylindrical portion of the inner container 12, 12 a surrounding portions of the segments 22, 24, 22 a, 24 a, 22 b, 24 b of the outer container 20 may also be corrugated, formed with stiffening rings or other suitable structure, wherein the inner and / or outer Hüllmantel lake of the cylindrical portions have the lateral surfaces of cylinders which have one of the mentioned cross-sectional shapes.
- the Hüllmantel lake arise when connecting the largest outer cross sections and when connecting the smallest inner cross sections of the cylindrical areas.
- FIGS. 9, 10 and 11 show a further embodiment of the double-walled container 10, wherein in a modification of FIG. 1 the stiffening elements 23a to 23j and 25a to 25j on the abutting on the outer surface of the inner container 12 side does not rest completely on this outer surface, but seen in the circumferential direction are formed wave-shaped.
- FIG. 10 is the detail B after FIG. 9 shown enlarged.
- the inner ring 43 between the stiffening members 25c and 25d has a clearance 44 from the outer surface of the inner container 12 due to the wave form.
- FIG. 11 is a cross section along AA in FIG. 9 represented by the wavy shape deviation of the inner ring 43 can be seen from the shape of the outer surface of the inner container 12.
- This shape deviation is also provided for the inner rings of the further stiffening elements 23 a to 23 j and 25 a to 25 j.
- This shape deviation from the shape of the outer surface which as mentioned can be circular, elliptical, etc., on the one hand causes an increase in the resistance moment of the inner ring 43 in the circumferential direction, so that the deformation stiffness of the outer segments 22, 24 and thus of the entire container 10 is improved .
- the spaces created by the spacings 44 cause free flow of the outer segment 22 and inner segment 13 (see FIG. FIGS. 6 and 7 ) resulting compensation air and possibly the hot air.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Tubes (AREA)
- Laminated Bodies (AREA)
- Packages (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen eines doppelwandigen Behälters, bei dem ein um einen inneren Behälter mit einem zylinderförmigen hohlen Abschnitt ein äußerer Behälter angeordnet wird.The invention relates to a method for producing a double-walled container in which an outer container is arranged around an inner container having a cylindrical hollow portion.
Aus dem Dokument
Ein Verfahren nach dem Oberbegriff des Anspruchs 1 ist aus dem Dokument
Aufgabe der Erfindung ist es, ein einfaches und kostengünstiges Verfahren zum Herstellen eines doppelwandigen Behälters anzugeben.The object of the invention is to provide a simple and inexpensive method for producing a double-walled container.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Patentansprüchen angegeben.This object is solved by the features of patent claim 1. Advantageous developments of the invention are specified in the dependent claims.
Ein doppelwandiger Behälter nach der Erfindung ist einfach und kostengünstig herzustellen und kann auf einfache Art und Weise so ausgebildet werden, dass er eine Druckfestigkeit sowohl gegen erhöhten Innendruck als auch gegen Außendruck aufweist. Das erste Segment und das zweite Segment können die gleiche Form haben, wodurch nur ein Formwerkzeug zur Herstellung dieser beiden Segmente erforderlich ist. Die zwei Segmente können einfach durch eine vorzugsweise umlaufende Schweiß- oder Klebeverbindung zusammengefügt werden, wodurch ihre Lage zueinander bereits durch das Anordnen der Segmente um den inneren Behälter herum fixiert werden kann. Ferner kann ein drittes Segment vorgesehen werden, das vorzugsweise aus einem in seiner Form mit dem ersten und zweiten Segment übereinstimmenden Formteil hergestellt ist. Insbesondere wird ein Abschnitt von einem Formteil, das die Form des ersten und zweiten Segments hat, abgetrennt, um das dritte Segment herzustellen. Dadurch können auf einfache Art und Weise und kostengünstig relativ großvolumige Behälter, insbesondere Tanks, hergestellt werden, indem mehrere gleiche Formkörper gleicher Form und mit denselben Abmessungen hergestellt werden, die als Segmente dienen und/oder aus denen die Segmente hergestellt werden. Die Länge des äußeren Behälters kann auf einfache Art und Weise durch kostengünstig herzustellende Segmente gleicher Form einfach verlängert werden, wodurch auf kostengünstige Art und Weise Behälter mit unterschiedlicher Länge hergestellt werden können.A double-walled container according to the invention is simple and inexpensive to manufacture and can be easily formed so that it has a compressive strength against both increased internal pressure and external pressure having. The first segment and the second segment may have the same shape, whereby only one mold is required for producing these two segments. The two segments can be easily assembled by a preferably circumferential weld or adhesive joint, whereby their position can already be fixed to each other by arranging the segments around the inner container. Furthermore, a third segment can be provided, which is preferably made of a matching in its shape with the first and second segment molding. Specifically, a portion of a molding having the shape of the first and second segments is cut off to make the third segment. As a result, relatively large-volume containers, in particular tanks, can be produced in a simple manner and inexpensively by producing a plurality of identical shaped articles of the same shape and dimensions, which serve as segments and / or from which the segments are produced. The length of the outer container can be easily extended in a simple manner by inexpensive to produce segments of the same shape, which can be produced in a cost-effective manner containers of different lengths.
Bei einer vorteilhaften Ausführungsform der Erfindung wird ein Blasformteil oder ein in einem Rollformverfahren hergestelltes Formteil derart getrennt, dass ein erster abgetrennter Bereich als erstes oder als zweites Segment dient und dass ein zweiter abgetrennter Bereich als Segment zum Herstellen eines aus mindestens zwei Segmenten zusammengefügten inneren Behälters dient.In an advantageous embodiment of the invention, a blow-molded part or a molded part produced in a roll-forming process is separated such that a first severed area serves as a first or second segment and a second severed area serves as a segment for producing an inner vessel assembled from at least two segments ,
Bei dieser Ausführungsform ist zum Herstellen der Segmente des inneren Behälters und des äußeren Behälters nur ein Formwerkzeug erforderlich, wodurch die Herstellungskosten zum Herstellen des doppelwandigen Behälters reduziert und auch eine geringe Stückzahl von Behältern wirtschaftlich hergestellt werden kann.In this embodiment, only one mold is required for producing the segments of the inner container and the outer container, whereby the manufacturing costs for producing the double-walled container can be reduced and even a small number of containers can be produced economically.
Ein doppelwandiger Behälter kann durch geeignete Ausbildung insbesondere der Segmente, als druckfester Behälter ausgebildet werden, wodurch ein druckfester doppelwandiger Behälter mit einem relativ geringen Materialaufwand herstellbar ist.A double-walled container can be formed by suitable design in particular of the segments as a pressure-resistant container, whereby a pressure-resistant double-walled container with a relatively low cost of materials can be produced.
Der zylinderförmige Abschnitt des inneren Behälters und die zylinderförmigen Abschnitte der Segmente des äußeren Behälters haben vorzugsweise die Form eines Kreiszylinders. Bei weiteren Ausführungsformen der Erfindung sind auch andere Zylinderquerschnitte, insbesondere elliptische, ovale, dreieckige, viereckige, fünfeckige, sechseckige, achteckige und weitere mehreckige Querschnitte möglich.The cylindrical portion of the inner container and the cylindrical portions of the segments of the outer container are preferably in the shape of a circular cylinder. In other embodiments of the invention, other cylinder cross sections, in particular elliptical, oval, triangular, quadrangular, pentagonal, hexagonal, octagonal and other polygonal cross sections are possible.
Zum besseren Verständnis der vorliegenden Erfindung wird im Folgenden auf die in den Zeichnungen dargestellten Ausführungsbeispiele Bezug genommen, die anhand spezifischer Terminologie beschrieben sind. Es sei jedoch darauf hingewiesen, dass der Schutzumfang der Erfindung dadurch nicht eingeschränkt werden soll, da derartige Veränderungen und weitere Modifizierungen an den gezeigten Vorrichtungen und/oder den Verfahren sowie derartige weitere Anwendungen der Erfindung, wie sie darin aufgezeigt sind, als übliches derzeitiges oder zukünftiges Fachwissen eines zuständigen Fachmanns angesehen werden. Die Figuren zeigen Ausführungsbeispiele der Erfindung, nämlich:
- Figur 1
- eine geschnittene Seitenansicht eines doppelwandigen druckfesten Behälters gemäß einer ersten Ausführungsform der Erfindung;
- Figur 2
- einen Ausschnitt der Verbindungsstelle zwischen zwei den äußeren Behälter bildenden Segmenten des doppelwandigen druckfesten Behälters nach
Figur 1 gemäß der ersten Ausführungsform der Erfindung; - Figur 3
- eine Verbindung zwischen zwei benachbarten Segmenten des äußeren Behälters gemäß einer zweiten Ausführungsform der Erfindung;
- Figur 4
- eine Schnittdarstellung eines Ausschnitts der Verbindungsstelle zwischen zwei benachbarten Segmenten des äußeren Behälters und zwischen zwei Segmenten des inneren Behälters gemäß einer dritten Ausführungsform der Erfindung;
- Figur 5
- eine Schnittdarstellung der Seitenansicht eines Formkörpers mit einem Abschnitt zum Erzeugen eines Segments zum Herstellen des inneren Behälters und einem Abschnitt zum Erzeugen eines Segments zum Herstellen des äußeren Behälters;
- Figur 6
- eine Schnittdarstellung eines Segments des inneren Behälters und eines Segments des äußeren Behälters beim Einführen des Segments des inneren Behälters in das Segment des äußeren Behälters;
- Figur 7
- eine alternative Anordnung zum Einführen eines Segments des inneren Behälters in ein Segment des äußeren Behälters;
- Figur 8
- eine Schnittdarstellung des Querschnitts jeweils eines Segments des inneren und des äußeren Behälters beim Einführen des inneren Behälters in ein Segment des äußeren Behälters; und
- Figur 9
- eine Abwandlung eines Ausführungsbeispiels nach
Figur 1 ; Figur 10- ein Detail B in
Figur 9 ; und - Figur 11
- einen Querschnitt längs AA in
Figur 9 .
- FIG. 1
- a sectional side view of a double-walled pressure-resistant container according to a first embodiment of the invention;
- FIG. 2
- a detail of the junction between two outer container forming segments of the double-walled pressure-resistant container after
FIG. 1 according to the first embodiment of the invention; - FIG. 3
- a connection between two adjacent segments of the outer container according to a second embodiment of the invention;
- FIG. 4
- a sectional view of a portion of the joint between two adjacent segments of the outer container and between two segments of the inner container according to a third embodiment of the invention;
- FIG. 5
- a sectional view of the side view of a molded body having a portion for producing a segment for producing the inner container and a portion for producing a segment for producing the outer container;
- FIG. 6
- a sectional view of a segment of the inner container and a segment of the outer container during insertion of the segment of the inner container into the segment of the outer container;
- FIG. 7
- an alternative arrangement for introducing a segment of the inner container into a segment of the outer container;
- FIG. 8
- a sectional view of the cross section of a respective segment of the inner and the outer container during insertion of the inner container into a segment of the outer container; and
- FIG. 9
- a modification of an embodiment according to
FIG. 1 ; - FIG. 10
- a detail B in
FIG. 9 ; and - FIG. 11
- a cross section along AA in
FIG. 9 ,
In
Bei einer anderen Ausführungsform ist der Außenquerschnitt des inneren Behälters 12 geringfügig größer als die Öffnungen der Segmente 22, 24, so dass eine kraftschlüssige Verbindung zwischen dem inneren Behälter 12 und den Segmenten 22, 24 beim Einsetzen desselben erzeugt wird. Das Segment 22 hat ringförmige Versteifungselemente 23a bis 23j und das zweite Segment hat ringförmige Versteifungselemente 25a bis 25j. Diese ringförmigen Versteifungselemente, allgemein mit 23, 25 bezeichnet, werden durch die Wand in Form eines in axialer Richtung verlaufenden Wellenprofils des jeweiligen Segments 22, 24 gebildet. Diese ringförmigen Versteifungselemente 23, 25 wirken dabei wie nebeneinander angeordnete Fassringe. Durch diese Versteifungselemente 23, 25 liegen ringförmige Bereiche des jeweiligen Segments 22, 24 an der Außenseite des inneren Behälters 12 an, wobei andere Bereiche der Segmente 22, 24 von der Außenseite des inneren Behälters 12 abstehen. Die an der Außenseite des inneren Behälters 12 anliegenden Bereiche der Versteifungselemente 23, 25 sind schmaler als die von der Außenseite des inneren Behälters 12 abstehenden Bereiche. Aufgrund der Krümmung der Versteifungselemente in axialer Richtung gesehen ist der Anstieg der Wandung der abstehenden Bereiche von den anliegenden Bereichen relativ steil, so dass jedes Versteifungselement 23, 25 zwei scheibenförmige Versteifungsringe bildet, die eine relativ große Kraft aufnehmen können und dem doppelwandigen Behälter 10 eine relativ große Verformungssteifigkeit geben. Insbesondere der zylinderförmige Abschnitt 14 des inneren Behälters 12 wird dadurch vor Verformungen infolge eines in den inneren Behälter 12 eingefüllten Mediums sowie gegenüber von außen auf den doppelwandigen Behälter 10 wirkenden Kräften geschützt. Dadurch kann der doppelwandige Behälter 10 sowohl von innen als auch von außen mit relativ hohem Druck bei relativ geringen Wandstärken des inneren Behälters 12 und des äußeren Behälters 20 beaufschlagt werden.In another embodiment, the outer cross section of the
An der Verbindungsstelle 26 zwischen dem ersten Segment 22 und dem zweiten Segment 24 ist eine in Umfangsrichtung vollständig umlaufende Schweißverbindung 28 vorgesehen, die das Segment 22 mit dem Segment 24 verbindet. Alternativ oder zusätzlich können die Segmente 22, 24 an ihrer Verbindungsstelle 26 mit Hilfe einer Klebeverbindung miteinander und/oder mit der Außenseite des inneren Behälters 12 verbunden werden. Jedes Segment 22, 24 umschließt einen Bereich des zylinderförmigen Abschnitts des inneren Behälters 12.At the
In
In
In
In
Die Segmente 22, 24 werden jeweils unmittelbar nach ihrer Herstellung in einem Blasformverfahren oder alternativ einem Rotationsformverfahren vor dem vollständigen Abkühlen auf den bereits abgekühlten inneren Behälter 12 oder alternativ auf ein bereits abgekühltes Segment 13 des inneren Behälters 12 geschoben. Beim Abkühlen der Segmente 22, 24 schrumpfen diese, so dass sich die Segmente 22, 24 zusammenziehen. Die der äußeren Oberfläche des inneren Behälters 12 bzw. des Segments 13 zugewandten Bereiche der gewellten Wand der Segmente 22, 24 werden durch den Schrumpfungsprozess der Segmente 22, 24 an die Außenseite des inneren Behälters 12 bzw. des Segments 13 gedrückt, so dass eine kraftschlüssige Verbindung zwischen den Segmenten 22, 24 und dem inneren Behälter 12 erzeugt wird, durch die eine ungewollte Verschiebung der Segmente 22, 24, z.B. während des Schweißvorgangs zum Erzeugen der Schweißverbindung 28, 28a, 28b, verhindert wird.The
In
In
Nach dem Zusammenfügen der Segmente 22, 24 und des inneren Behälters 12 werden die aneinandergrenzenden Segmente 22, 24 an ihrer Verbindungsstelle 26miteinander verschweißt. Alternativ oder zusätzlich können wie beschrieben die Segmente 22, 24 auch mit dem inneren Behälter 12, vorzugsweise mit der Außenseite des inneren Behälters 12, verschweißt werden.After joining the
Vorteilhaft ist es, die Segmente 13, 22 , wie in
Alternativ zu den im Zusammenhang mit
Alternativ zu der beschriebenen Schweißverbindung 28 kann eine Klebeverbindung zwischen den Segmenten 22, 24 und/oder zwischen den Segmenten 22, 24 und der Außenseite des inneren Behälters 12 vorgesehen sein. Ferner kann der innere Behälter 12 aus mindestens zwei Segmenten 13 zusammengesetzt sein, die mit Hilfe einer Klebeverbindung mit einander verbunden sind. Der doppelwandige Behälter 10 hat mindestens eine Einfüll- und/oder Entnahmeöffnung. Die Einfüll- und/oder Entnahmeöffnung ist vorzugsweise als Dom ausgebildet. Die Segmente 22, 24 können vorzugsweise in einem an die Außenwand des inneren Behälters 12 angrenzenden Bereich 30 ringförmig abgetrennt werden, wodurch weitere Segmente zum Verlängern des den zylinderförmigen Bereich 14 des inneren Behälters 12 umschließenden Bereich des äußeren Behälters 20 hergestellt werden können. Zum Verlängern des zylinderförmigen Bereichs 14 des inneren Behälters 12 kann dieser aus einer Vielzahl zylinderförmiger kurzer Abschnitte zusammengesetzt sein. Diese Abschnitte werden dann untereinander verbunden.As an alternative to the described welded
Alternativ zu der im Zusammenhang mit
Durch die im Zusammenhang mit den
Der zylinderförmige Abschnitt 14 des inneren Behälters 12, 12a sowie die den zylinderförmigen Abschnitt 14 des inneren Behälters 12, 12a umgebende Abschnitte der Segmente 22, 24, 22a, 24a, 22b, 24b des äußeren Behälters 20 haben vorzugsweise die Form eines Kreiszylinders bzw. der Mantelfläche eines Kreiszylinders. Bei weiteren Ausführungsformen der Erfindung sind andere Querschnittsformen der zylinderförmigen Abschnitte sowie der Öffnungen der Segmente 22, 24, 22a, 24a, 22b, 24b, in die jeweils ein Abschnitt des inneren Behälters 12 eingeführt ist, vorgesehen. Solche Querschnittsformen sind beispielsweise elliptische, ovale, dreieckige, viereckige, fünfeckige, sechseckige und weitere mehreckige sowie weitere mindestens einen parabelförmigen Abschnitt umfassende Querschnitte. Die Mantelflächen der den zylinderförmigen Abschnitt des inneren Behälters 12, 12a umgebenden Abschnitte der Segmente 22, 24, 22a, 24a, 22b, 24b des äußeren Behälters 20 können auch gewellt, mit Versteifungsringen oder mit einer anderen geeigneten Struktur ausgebildet sein, wobei die inneren und/oder äußeren Hüllmantelflächen der zylinderförmigen Abschnitte die Mantelflächen von Zylindern haben, die eine der erwähnten Querschnittsformen haben. Die Hüllmantelflächen ergeben sich beim Verbinden der größten äußeren Querschnitte sowie beim Verbinden der kleinsten inneren Querschnitte der zylinderförmigen Bereiche.The
Die
In
Obgleich in den Zeichnungen und in der vorhergehenden Beschreibung bevorzugte Ausführungsbeispiele aufgezeigt und detailliert beschrieben worden sind, soll dies lediglich als rein beispielhaft und die Erfindung nicht einschränkend angesehen werden. Es wird darauf hingewiesen, dass nur die bevorzugten Ausführungsbeispiele dargestellt und beschrieben sind und sämtliche Veränderungen und Modifizierungen, die derzeit und künftig im Schutzumfang der Erfindung liegen, geschützt werden sollen.Although in the drawings and in the foregoing description preferred embodiments have been shown and described in detail, it is to be considered as illustrative only and not restrictive of the invention. It should be understood that only the preferred embodiments are shown and described and all changes and modifications that are presently and in the future within the scope of the invention should be protected.
- 1010
- doppelwandiger Behälterdouble-walled container
- 12, 12b12, 12b
- innerer Behälterinner container
- 1313
- Segmentsegment
- 1414
- zylinderförmiger Abschnittcylindrical section
- 16, 1816, 18
- abgerundeter Abschnittrounded section
- 2020
- äußerer Behälterouter container
- 2222
- erstes Segmentfirst segment
- 23a bis 23j23a to 23j
- Versteifungselementestiffeners
- 2424
- zweites Segmentsecond segment
- 25a bis 25j25a to 25y
- Versteifungselementestiffeners
- 26, 26a, 26b26, 26a, 26b
- Verbindungsstellejunction
- 28, 28a, 28b28, 28a, 28b
- Schweißverbindungwelded joint
- 22a, 22b22a, 22b
- erstes Segmentfirst segment
- 24a, 24b24a, 24b
- zweites Segmentsecond segment
- 2121
- Öffnungopening
- 2929
- BlasformteilBlow-Molded
- 3030
- anliegender Bereichadjoining area
- 3232
- Durchmesserdiameter
- 3434
- Öffnungopening
- 3636
- Einwölbungconcavity
- 38, 40, 4238, 40, 42
- Zwischenraumgap
- 4343
- innerer Ringinner ring
- 4444
- Abstanddistance
Claims (10)
- A method for manufacturing a double-walled container,
in which an inner container (12) is manufactured with a cylindrical hollow section (14), the cylindrical hollow section (14) being manufactured with a substantially smooth circumferential surface,
an outer container (20) is composed of at least two segments (22, 24), each segment (22, 24) having an opening corresponding to the outer cross-sectional surface of the cylindrical section (14),
a first section or first segment (13) of the inner container (12) is arranged within the opening of the first segment (22), as a result whereof the base area and a first area of the cylindrical section (14) of the inner container (12) are surrounded,
a second section or a second segment of the inner container (12) is inserted within the opening of the second segment (24), in the inserted state the top area and a second area of the cylindrical section (14) of the inner container (12) being surrounded,
and in which segments (22, 24 13) arranged next to one another are joined to one another at a joint (26),
characterized in that the segments (22, 24) of the outer container are each manufactured in one piece with the aid of a blow-moulding method or with the aid of a rotary forming method and, immediately after their manufacturing, are arranged around the respective area of the inner container (12) so that by means of a shrinking process of the respective segment (22, 24) a non-positive connection at the points of contact and/or areas of contact (30) of the respective segment (22, 24) with the inner container (12) is established. - The method according to claim 1, characterized in that the first segment (22) and the second segment (24) are manufactured with the aid of the same moulding tool.
- The method according to claim 2, characterized in that for providing the first segment (22) and the second segment (24) as well as at least a further third segment equally shaped elements are manufactured with the aid of the moulding tool, for manufacturing the third segment an area of the formed element being separated such that the third segment only has a cylindrical section through which a third area of the cylindrical section (14) of the inner container (12) is surrounded, the adjacent segments (22, 24) being joined to one another at a joint (26), preferably at a common butt joint.
- The method according to one of the claims 1 to 3, characterized in that the segments (13, 22, 24) arranged next to one another are welded to one another at least section-wise by means of a circumferentially extending weld joint and preferably simultaneously to the inner container.
- The method according to one of the claims 1 to 4, characterized in that the outer wall of the inner container (12) is inwardly vaulted in an area of the cylindrical section (14) for arrangement of the inner container (12) within the opening of the first segment (22) and within the opening of the second segment (24) so that the cross-section of the cylindrical section (14) is reduced in this area.
- The method according to one of the claims 1 to 5, characterized in that for arrangement of the cylindrical section (14) within the opening of the first segment (22) and/or within the opening of the second segment (24) of the outer container (20) hot air is blown in between the circumferential surface of the cylindrical section and the inside of the respective segment (22, 24) of the outer container.
- The method according to one of the claims 1 to 6, characterized in that in the interior space of the first and/or second segment (22, 24) of the outer container (20) a vacuum is generated, by means of which an insertion of the cylindrical section (14) into the first segment (22) and/or into the second segment (24) of the outer container (20) is facilitated, with the aid of the vacuum a pressure being applied on the section closing the base area or, respectively, the top area of the cylindrical section (14).
- The method according to one of the claims 1 to 7, characterized in that in the section of the first segment (22) surrounding the first area of the cylindrical section (14) of the inner container (12), in the section of the second segment (22) surrounding the second area of the cylindrical section (14) of the inner container (12) and/or in the section of the third segment surrounding the third area of the cylindrical section (14) of the inner container (12), at least one annular reinforcing element (23, 25) each is generated, by means of which a force from the cylindrical section (14) of the inner container (12) acting outwardly on the segments (22, 24) of the outer container (20) is taken up so that the inner and/or outer container (12, 20) do not or not substantially deform.
- The method according to one of the claims 1 to 8, characterized in that a moulded part (29) is produced from which a segment (13) of the inner container (12) and a segment (22) of the outer container (20) are made.
- The method according to one of the preceding claims 8 and 9, characterized in that the annular reinforcing element (25c) has an inner ring (43), the inner surface of which, as seen in the circumferential direction, is waved and abuts the outer surface of the inner container (12) in sections and is spaced to this outer surface in other sections.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL07712490T PL1993938T3 (en) | 2006-03-13 | 2007-03-08 | Double-walled container |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006011475A DE102006011475A1 (en) | 2006-03-13 | 2006-03-13 | Double-walled container |
PCT/EP2007/052184 WO2007104699A1 (en) | 2006-03-13 | 2007-03-08 | Double-walled container |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1993938A1 EP1993938A1 (en) | 2008-11-26 |
EP1993938B1 true EP1993938B1 (en) | 2009-07-29 |
Family
ID=38110756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07712490A Not-in-force EP1993938B1 (en) | 2006-03-13 | 2007-03-08 | Double-walled container |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1993938B1 (en) |
AT (1) | ATE437818T1 (en) |
DE (2) | DE102006011475A1 (en) |
ES (1) | ES2330485T3 (en) |
PL (1) | PL1993938T3 (en) |
RU (1) | RU2008127758A (en) |
WO (1) | WO2007104699A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010064511B3 (en) * | 2010-10-20 | 2023-12-28 | Hubert Kohler | PRESSURE VESSEL |
DE102013103714B4 (en) * | 2013-04-12 | 2016-08-04 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | DEVICE AND METHOD FOR PROVIDING HEAT CONTACT FROM A GAS STORAGE TO A COOLING BODY |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69509384T2 (en) * | 1995-09-20 | 1999-08-26 | Tosto Walter Serbatoi Spa | External protective device and secondary retention system for underground, metallic containers for liquid hydrocarbons and structural element therefor |
-
2006
- 2006-03-13 DE DE102006011475A patent/DE102006011475A1/en not_active Withdrawn
-
2007
- 2007-03-08 ES ES07712490T patent/ES2330485T3/en active Active
- 2007-03-08 AT AT07712490T patent/ATE437818T1/en active
- 2007-03-08 PL PL07712490T patent/PL1993938T3/en unknown
- 2007-03-08 WO PCT/EP2007/052184 patent/WO2007104699A1/en active Application Filing
- 2007-03-08 EP EP07712490A patent/EP1993938B1/en not_active Not-in-force
- 2007-03-08 DE DE502007001191T patent/DE502007001191D1/en active Active
- 2007-03-08 RU RU2008127758/12A patent/RU2008127758A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
WO2007104699A1 (en) | 2007-09-20 |
ATE437818T1 (en) | 2009-08-15 |
EP1993938A1 (en) | 2008-11-26 |
PL1993938T3 (en) | 2010-01-29 |
DE102006011475A1 (en) | 2007-09-20 |
RU2008127758A (en) | 2010-04-20 |
DE502007001191D1 (en) | 2009-09-10 |
ES2330485T3 (en) | 2009-12-10 |
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