EP3362239B1 - Method for producing concrete pipes - Google Patents
Method for producing concrete pipes Download PDFInfo
- Publication number
- EP3362239B1 EP3362239B1 EP16791517.2A EP16791517A EP3362239B1 EP 3362239 B1 EP3362239 B1 EP 3362239B1 EP 16791517 A EP16791517 A EP 16791517A EP 3362239 B1 EP3362239 B1 EP 3362239B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- mould
- core
- mold
- sleeve
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000005266 casting Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000009969 flowable effect Effects 0.000 description 18
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/04—Methods or machines specially adapted for the production of tubular articles by casting into moulds by simple casting, the material being neither positively compacted nor forcibly fed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/76—Moulds
- B28B21/765—Top or bottom rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
- B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/90—Methods or apparatus for demoulding or discharging after shaping
Definitions
- the invention relates to a method for producing concrete pipes in an upright casting mold with a mold space between a core and a jacket divided lengthwise and with mold sockets closing off the mold space at the top and bottom, flowable concrete being poured into the mold space and the concrete pipe being Setting of the concrete is demolded by opening the mantle.
- the upper mold socket must allow the flowable concrete to be poured into the mold space from above, which requires open-ended upper mold sockets with the disadvantage that the end faces of the pipe body in the area of the open end faces of the upper mold sockets have to be smoothed by hand, which is added to that the setting behavior of the flowable concrete poured into the mold space can hardly be taken into account.
- the air bubbles enclosed in the flowable concrete escape upwards and can only partially escape through the open end face of the upper mold socket, so that the air bubbles collect in particular in the area of the outer peripheral wall of the upper mold socket Give rise to undesired air voids in the area of the offset, end-face coupling attachments of the finished concrete pipes.
- the invention is therefore based on the object of designing a wet concrete casting method for producing concrete pipes in the mold space between a core and a shell of a standing mold in such a way that not only the prerequisites for a dimensionally accurate design of the coupling attachments formed by the upper mold sleeve are created, but also the The risk of air voids forming in the set pipe body is avoided and the setting behavior of the flowable concrete can be taken into account in a simple manner.
- the invention solves the task in that the free-flowing concrete is poured into the mold space in a predetermined amount when the upper mold sleeve is removed and that the upper mold sleeve forming a closed ring only occurs after a setting time for a predetermined setting volume of the cast tubular body between the core and the shell is pressed into the end face of the tubular body in a shaping manner.
- a filling volume must be provided that exceeds the volume of the concrete pipe to be produced by the setting volume.
- the setting behavior of different concrete compositions and thus the setting volume to be taken into account in each case can be determined in a simple manner, for example by tests. In practice, it has been found that after just a few minutes there is a settlement that allows compression molding through the upper mold sleeve within a specified manufacturing tolerance.
- the compression molding of the end coupling attachment of the concrete pipe to be produced can be assisted by rotating the upper mold sleeve during and/or after pressing it into the flowable concrete.
- a casting mold for carrying out the wet concrete casting method according to the invention for the production of a concrete pipe has a base 1 with a core 2 and a jacket 3, between which and the core 2 an annular mold space 4 is formed. At the bottom, this mold space 4 is closed off by a mold sleeve 5 which rests on the base 1 and, in conjunction with the jacket 3, provides for the formation of an enlarged sleeve 6 at the lower end of the tubular body 7 made of concrete.
- a separate upper mold sleeve 9 in the form of a closed ring, which can be inserted coaxially with the casting mold between the core 2 and the jacket 3 into the annular space 4 and preferably rotated about its axis.
- both the core 2 and the jacket 3 are usually designed to be divided lengthwise. While the jacket 3 must be pulled radially outwards from the concrete pipe to be removed from the mold, the core must be drawn in radially inwards from the concrete pipe in order to release the pipe body 7 .
- This is achieved in a known manner in that the longitudinal edges of the divided peripheral wall of the core 2 that run parallel to one another at a distance in the peripheral direction in the usage position of the core are pulled towards one another.
- a division of the core which would otherwise be necessary can also be omitted.
- the longitudinal edges of the divided jacket 3 lying against one another in the position of use of the jacket 3 are correspondingly pulled apart. In a one-piece design, the shell 3 is thus expanded, while in a two-piece design, the two shell halves are pulled apart.
- free-flowing concrete is poured in a predetermined amount, tailored to the pipe to be produced, into the mold space 4 between the core 2 and the shell of the mold when the upper mold sleeve 9 is lifted, usually from above in accordance with the 1 filled.
- the tubular body 7 Before the upper mold sleeve 9 is pressed into the tubular body 7 on flowable concrete in order to form a coupling attachment 8 , the tubular body 7 must be allowed to set.
- the fill level of the mold space 4 drops according to the 2 from an initial level 10 indicated by a dot-dash line to a level 11 with compaction of the concrete.
- the jacket and/or the core can be provided with a vibration drive.
- the air bubbles enclosed in the flowable concrete can escape upwards from the mold space 4 during this setting time, so that when the upper mold sleeve is then pressed into the flowable concrete between the core 2 and the jacket 3, the coupling attachment 8 is formed without pores and with smooth wall surfaces. It is only necessary to ensure that the when inserting the upper mold sleeve 9 into the mold space 4 , air collecting above the tubular body 7 can escape from the mold sleeve 9 , which is ensured by the required guide gap between the upper mold sleeve 9 and the core 2 .
- the tubular body 7 can be demolded by opening the jacket 3 and pulling it apart radially outwards and pulling the core 2 in radially.
- the upper mold sleeve 9 can remain on the tubular body 7 during demoulding, but can also be removed beforehand.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zum Herstellen von Betonrohren in einer stehenden Gießform mit einem Formraum zwischen einem Kern und einem der Länge nach geteilten Mantel und mit den Formraum unten und oben abschließenden Formmuffen, wobei fließfähiger Beton in den Formraum eingefüllt und das Betonrohr nach einem Abbinden des Betons durch ein Öffnen des Mantels entformt wird.The invention relates to a method for producing concrete pipes in an upright casting mold with a mold space between a core and a jacket divided lengthwise and with mold sockets closing off the mold space at the top and bottom, flowable concrete being poured into the mold space and the concrete pipe being Setting of the concrete is demolded by opening the mantle.
Zum Unterschied zu einem Rüttel-Pressverfahren wird bei einem Nassbetongießverfahren fließfähiger Beton in den Formraum einer Gießform gegossen, was dazu führt, dass der Betonkörper in der Gießform Abbinden muss, bevor er entformt werden kann. Für die Herstellung von Betonrohren in stehenden Gießformen bedeutet dies, dass zum Entformen des abgebundenen Rohrkörpers der geteilte Mantel der Gießform entweder durch ein Aufweiten oder ein radiales Auseinanderziehen der Mantelhälften geöffnet und der Kern in seinem Durchmesser verkleinert wird. Da die obere Formmuffe dem Mantel zugeordnet ist, muss auch die obere Formmuffe geteilt ausgeführt sein. Allerdings muss die obere Formmuffe ein Gießen des fließfähigen Betons in den Formraum von oben zulassen, was stirnseitig offene obere Formmuffen mit dem Nachteil erfordert, dass die Stirnflächen des Rohrkörpers im Bereich der offenen Stirnseiten der oberen Formmuffen von Hand aus geglättet werden müssen, wozu noch kommt, dass das Setzverhalten des in den Formraum gegossenen, fließfähigen Betons kaum berücksichtigt werden kann. Im Zuge des Setzvorgangs entweichen die im fließfähigen Beton eingeschlossenen Luftbläschen nach oben und können nur zum Teil über die offene Stirnseite der oberen Formmuffe entweichen, sodass die sich insbesondere im Bereich der äußeren Umfangswand der oberen Formmuffe sammelnden Luftbläschen Anlass zu unerwünschten Luftporen im Bereich der abgesetzten, stirnseitigen Kupplungsansätze der fertigen Betonrohre geben.In contrast to a vibrating press method, in a wet concrete pouring method flowable concrete is poured into the mold cavity of a mould, which means that the concrete body has to set in the mold before it can be removed from the mould. For the production of concrete pipes in vertical casting molds, this means that to demould the set pipe body, the split shell of the casting mold is opened either by expanding or radially pulling the shell halves apart and the diameter of the core is reduced. Since the upper mold sleeve is assigned to the shell, the upper mold sleeve must also be split. However, the upper mold socket must allow the flowable concrete to be poured into the mold space from above, which requires open-ended upper mold sockets with the disadvantage that the end faces of the pipe body in the area of the open end faces of the upper mold sockets have to be smoothed by hand, which is added to that the setting behavior of the flowable concrete poured into the mold space can hardly be taken into account. In the course of the setting process, the air bubbles enclosed in the flowable concrete escape upwards and can only partially escape through the open end face of the upper mold socket, so that the air bubbles collect in particular in the area of the outer peripheral wall of the upper mold socket Give rise to undesired air voids in the area of the offset, end-face coupling attachments of the finished concrete pipes.
Um das Setzverhalten von im Rüttel-Pressverfahren hergestellten Betonrohren nach ihrer Entformung berücksichtigen zu können, ist es bekannt (
Die
Der Erfindung liegt somit die Aufgabe zugrunde, ein Nassbetongießverfahren zum Herstellen von Betonrohren im Formraum zwischen einem Kern und einem Mantel einer stehenden Gießform so auszugestalten, dass nicht nur die Voraussetzungen für eine maßgenaue Ausbildung der durch die obere Formmuffe gebildeten Kupplungsansätze geschaffen werden, sondern auch die Gefahr der Ausbildung von Luftporen im abgebundenen Rohrkörper vermieden und das Setzverhalten des fließfähigen Betons in einfacher Weise berücksichtigt werden kann.The invention is therefore based on the object of designing a wet concrete casting method for producing concrete pipes in the mold space between a core and a shell of a standing mold in such a way that not only the prerequisites for a dimensionally accurate design of the coupling attachments formed by the upper mold sleeve are created, but also the The risk of air voids forming in the set pipe body is avoided and the setting behavior of the flowable concrete can be taken into account in a simple manner.
Ausgehend von einem Verfahren der eingangs geschilderten Art löst die Erfindung die gestellte Aufgabe dadurch, dass der fließfähige Beton bei abgenommener oberer Formmuffe in einer vorbestimmten Menge in den Formraum eingefüllt wird und dass die einen geschlossenen Ring bildende obere Formmuffe erst nach einer Setzzeit für ein vorgegebenes Setzvolumen des gegossenen Rohrkörpers zwischen dem Kern und dem Mantel formgebend in die Stirnfläche des Rohrkörpers eingedrückt wird.Based on a method of the type described above, the invention solves the task in that the free-flowing concrete is poured into the mold space in a predetermined amount when the upper mold sleeve is removed and that the upper mold sleeve forming a closed ring only occurs after a setting time for a predetermined setting volume of the cast tubular body between the core and the shell is pressed into the end face of the tubular body in a shaping manner.
Da der fließfähige Beton bei abgenommener oberer Formmuffe in den Formraum gegossen und die obere Formmuffe erst nach einer vorgegebenen Setzzeit in den noch fließfähigen Beton eingedrückt wird, können die während der Setzzeit im Rohrkörper aufsteigenden Luftbläschen unbehindert durch die obere Formmuffe nach oben entweichen, sodass beim anschließenden Formpressen des stirnseitigen Kupplungsansatzes durch ein Eindrücken der oberen Formmuffe in den noch fließfähigen Beton glatte Wandflächen nicht nur im Umfangsbereich, sondern auch im Bereich der Stirnseite geformt werden. Das Abwarten des Setzvorgangs für den in den Formraum gegossenen Beton und das nachträgliche Formen des Kupplungsansatzes setzt allerdings eine Befüllung des Formraums mit einer vorgegebenen Menge an fließfähigem Beton voraus, um eine vorgegebene Länge des herzustellenden Betonrohrs sicherstellen zu können. Es muss demnach ein Füllvolumen bereitgestellt werden, das das Volumen des herzustellenden Betonrohrs um das Setzvolumen übersteigt. Das Setzverhalten unterschiedlicher Betonzusammensetzungen und damit das jeweils zu berücksichtigende Setzvolumen kann in einfacher Weise beispielsweise durch Versuche festgestellt werden. In der Praxis hat sich herausgestellt, dass bereits nach wenigen Minuten eine Setzung vorliegt, die eine Formpressung durch die obere Formmuffe innerhalb einer vorgegebenen Fertigungstoleranz erlaubt.Since the flowable concrete is poured into the mold space with the upper mold socket removed and the upper mold socket is only pressed into the still flowable concrete after a specified setting time, the air bubbles rising in the pipe body during the setting time can escape upwards unhindered through the upper mold socket, so that during the subsequent Compression molding of the end-face coupling approach by pressing the upper mold sleeve into the still flowable concrete, smooth wall surfaces are formed not only in the peripheral area, but also in the area of the end face. However, waiting for the setting process for the concrete poured into the mold cavity and the subsequent molding of the coupling attachment requires the mold cavity to be filled with a specified quantity of flowable concrete in order to be able to ensure a specified length of the concrete pipe to be produced. Accordingly, a filling volume must be provided that exceeds the volume of the concrete pipe to be produced by the setting volume. The setting behavior of different concrete compositions and thus the setting volume to be taken into account in each case can be determined in a simple manner, for example by tests. In practice, it has been found that after just a few minutes there is a settlement that allows compression molding through the upper mold sleeve within a specified manufacturing tolerance.
Das Formpressen des stirnseitigen Kupplungsansatzes des herzustellenden Betonrohrs kann durch ein Drehen der oberen Formmuffe während und/oder nach dem Eindrücken in den fließfähigen Beton unterstützt werden.The compression molding of the end coupling attachment of the concrete pipe to be produced can be assisted by rotating the upper mold sleeve during and/or after pressing it into the flowable concrete.
Anhand der Zeichnung wird das erfindungsgemäße Verfahren näher erläutert. Es zeigen
- Fig. 1
- eine Gießform zur Durchführung eines erfindungsgemäßen Herstellungsverfahrens für Betonrohre in einem Axialschnitt mit einer vom Formraum abgehobenen oberen Formmuffe unmittelbar nach der Befüllung mit fließfähigem Beton,
- Fig. 2
- den Formraum zwischen Kern und Mantel der Gießform ausschnittsweise im Bereich der oberen Formmuffe nach dem Setzvorgang des Rohrkörpers aus fließfähigem Beton in einem größeren Maßstab und
- Fig. 3
- eine der
Fig. 2 entsprechende Darstellung der Gießform nach dem formgebenden Eindrücken der oberen Formmuffe in den Rohrkörper.
- 1
- a casting mold for carrying out a production method for concrete pipes according to the invention in an axial section with an upper mold sleeve lifted from the mold space immediately after filling with flowable concrete,
- 2
- the mold space between the core and the shell of the casting mold in a section in the area of the upper mold sleeve after the setting process of the tubular body made of flowable concrete on a larger scale and
- 3
- one of the
2 Corresponding depiction of the casting mold after the upper mold sleeve has been pressed into the tubular body.
Wie sich insbesondere aus der
Zum Entformen eines hergestellten Betonrohrs sind üblicherweise sowohl der Kern 2 als auch der Mantel 3 der Länge nach geteilt ausgeführt. Während der Mantel 3 radial nach außen vom zu entformenden Betonrohr abgezogen werden muss, ist der Kern vom Betonrohr radial nach innen einzuziehen, um den Rohrkörper 7 freizugeben. Dies wird in bekannter Weise dadurch erreicht, dass die in der Gebrauchsstellung des Kerns mit Abstand in Umfangsrichtung parallel zueinander verlaufenden Längsränder der geteilten Umfangswand des Kerns 2 gegeneinander gezogen werden. Bei einer konischen Kernausbildung kann eine sonst erforderliche Teilung des Kerns auch entfallen. Die in der Gebrauchsstellung des Mantels 3 aneinanderliegenden Längsränder des geteilten Mantels 3 werden dementsprechend auseinandergezogen. Bei einer einteiligen Ausführung wird somit der Mantel 3 aufgeweitet, während bei einer zweiteiligen Konstruktion die beiden Mantelhälften auseinandergezogen werden.For demoulding a concrete pipe that has been produced, both the
Zur Herstellung eines Betonrohrs wird fließfähiger Beton in einer vorgegebenen, auf das herzustellende Rohr abgestimmte Menge in den Formraum 4 zwischen dem Kern 2 und dem Mantel der Gießform bei abgehobener oberer Formmuffe 9 meistens von oben entsprechend der
Die im fließfähigen Beton eingeschlossenen Luftbläschen können während dieser Setzzeit nach oben aus dem Formraum 4 entweichen, sodass beim anschließenden Eindrücken der oberen Formmuffe in den fließfähigen Beton zwischen dem Kern 2 und dem Mantel 3 der Kupplungsansatz 8 porenfrei mit glatten Wandflächen geformt wird. Es ist lediglich darauf zu achten, dass die beim Einführen der oberen Formmuffe 9 in den Formraum 4 sich oberhalb des Rohrkörpers 7 sammelnde Luft aus der Formmuffe 9 entweichen kann, was durch den erforderlichen Führungsspalt zwischen der oberen Formmuffe 9 und dem Kern 2 gewährleistet wird.The air bubbles enclosed in the flowable concrete can escape upwards from the
Nach einem für das Entformen notwendigen Abbinden des Betons kann der Rohrkörper 7 entformt werden, indem der Mantel 3 geöffnet und radial nach außen auseinandergezogen sowie der Kern 2 radial eingezogen wird. Die obere Formmuffe 9 kann während der Entformung auf dem Rohrkörper 7 verbleiben aber auch vorher abgezogen werden.After the concrete has set, which is necessary for demolding, the
Claims (2)
- Method for producing concrete pipes in a vertical casting mould comprising a mould space (4) between a core (2) and a casing (3), which is divided longitudinally, and comprising mould sleeves (5, 9) which terminate the mould space (4) at the bottom and top, wherein pourable concrete is introduced into the mould space (4), and the pipe body (7) is removed from the mould after the concrete has set by opening the casing (3), characterised in that, with the upper mould sleeve (9) removed, the pourable concrete is introduced into the mould space (4) in a predetermined quantity corresponding to the volume of the concrete pipe to be produced and exceeding it by a setting volume, and in that the upper mould sleeve (9) which forms a closed ring is pressed into the end face of the pipe body (7) in a shaping manner between the core (2) and the casing (3) only after a setting time for the specified setting volume of the cast pipe body (7) and after the filling height of the mould space (4) has fallen during the setting time.
- Method as claimed in claim 1, characterised in that the upper mould sleeve (9) is pressed into the pipe body (7) between the core (2) and the casing (3) and is rotated about its axis.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50881/2015A AT517916A1 (en) | 2015-10-16 | 2015-10-16 | Method for producing concrete pipes |
PCT/AT2016/050260 WO2017063010A1 (en) | 2015-10-16 | 2016-10-13 | Method for producing concrete pipes |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3362239A1 EP3362239A1 (en) | 2018-08-22 |
EP3362239B1 true EP3362239B1 (en) | 2023-06-14 |
EP3362239C0 EP3362239C0 (en) | 2023-06-14 |
Family
ID=57249617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16791517.2A Active EP3362239B1 (en) | 2015-10-16 | 2016-10-13 | Method for producing concrete pipes |
Country Status (4)
Country | Link |
---|---|
US (1) | US11724417B2 (en) |
EP (1) | EP3362239B1 (en) |
AT (1) | AT517916A1 (en) |
WO (1) | WO2017063010A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112936571B (en) * | 2019-11-26 | 2023-01-24 | 金科新能源有限公司 | Forming construction method of prefabricated tower barrel |
CN111745793B (en) * | 2020-06-30 | 2021-08-27 | 北京欣江峰市政工程有限责任公司 | Hollow square pile forming die of concrete |
CN113199619A (en) * | 2021-05-06 | 2021-08-03 | 山东春禾新材料研究院有限公司 | Mold for manufacturing ultra-high performance concrete hollow pipe and application method |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2137924A (en) * | 1938-04-12 | 1938-11-22 | Schickedanz William | Window ventilator |
US2334509A (en) * | 1940-10-26 | 1943-11-16 | Reeves Robert Bruce | Apparatus for molding or lining hollow articles |
US3078539A (en) * | 1960-02-01 | 1963-02-26 | Cie Miron Ltee | Concrete pipe moulding apparatus |
US3334390A (en) * | 1965-01-04 | 1967-08-08 | Steiro Harry | End ring trowelling attachment for concrete pipe making apparatus |
US3461516A (en) * | 1966-07-22 | 1969-08-19 | Vessot Co Ltd S | Apparatus for moulding concrete pipes |
DK135614B (en) * | 1975-09-25 | 1977-05-31 | Pedershaab Maskinfabrik As | Machine for casting concrete pipes in a standing position. |
DE2741246C2 (en) * | 1977-09-14 | 1981-09-10 | Georg Fischer AG, 8201 Schaffhausen | Device and method for producing pipes |
AU2719984A (en) * | 1983-04-12 | 1984-10-18 | Hume, G.R. | Concrete pipe and pole manufacture |
DE3323340A1 (en) * | 1983-06-29 | 1985-01-03 | Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren | Moulding apparatus for producing concrete mouldings |
DE8318804U1 (en) * | 1983-06-29 | 1983-10-20 | Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren | MOLDING DEVICE FOR PRODUCING CONCRETE MOLDED PARTS |
DE4029480A1 (en) * | 1990-09-17 | 1992-03-19 | Prinzing Georg Gmbh Co Kg | METHOD FOR PRODUCING CONCRETE PARTS |
EP0670763A1 (en) * | 1993-09-30 | 1995-09-13 | Colle S.P.A. | Method and device for producing concrete pipes of uniform length |
US20050269747A1 (en) | 2004-06-04 | 2005-12-08 | Wuelfing Otto J | Press head assembly for concrete pipe making machine |
US7832703B2 (en) * | 2009-01-09 | 2010-11-16 | Hawkeye Concrete Products Co. | Apparatus and method for protecting lined concrete pipe during the manufacturing process |
DE102012217324A1 (en) | 2012-09-25 | 2014-03-27 | Johann Schlüsselbauer | System and method for producing tubular concrete products |
-
2015
- 2015-10-16 AT ATA50881/2015A patent/AT517916A1/en not_active Application Discontinuation
-
2016
- 2016-10-13 WO PCT/AT2016/050260 patent/WO2017063010A1/en active Application Filing
- 2016-10-13 EP EP16791517.2A patent/EP3362239B1/en active Active
- 2016-10-13 US US15/765,444 patent/US11724417B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2017063010A1 (en) | 2017-04-20 |
US20180297234A1 (en) | 2018-10-18 |
AT517916A1 (en) | 2017-05-15 |
EP3362239A1 (en) | 2018-08-22 |
EP3362239C0 (en) | 2023-06-14 |
US11724417B2 (en) | 2023-08-15 |
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