WO2021204792A2 - Noyau de moule conçu pour un moule pour produire des corps en béton creux et ensemble moule comportant un tel noyau de moule - Google Patents

Noyau de moule conçu pour un moule pour produire des corps en béton creux et ensemble moule comportant un tel noyau de moule Download PDF

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Publication number
WO2021204792A2
WO2021204792A2 PCT/EP2021/058924 EP2021058924W WO2021204792A2 WO 2021204792 A2 WO2021204792 A2 WO 2021204792A2 EP 2021058924 W EP2021058924 W EP 2021058924W WO 2021204792 A2 WO2021204792 A2 WO 2021204792A2
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WO
WIPO (PCT)
Prior art keywords
sealing element
mold core
core
mold
section
Prior art date
Application number
PCT/EP2021/058924
Other languages
German (de)
English (en)
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WO2021204792A3 (fr
Inventor
Johann SCHLÜSSELBAUER
Ulrich SCHLÜSSELBAUER
Original Assignee
Schluesselbauer Johann
Schluesselbauer Ulrich
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by Schluesselbauer Johann, Schluesselbauer Ulrich filed Critical Schluesselbauer Johann
Publication of WO2021204792A2 publication Critical patent/WO2021204792A2/fr
Publication of WO2021204792A3 publication Critical patent/WO2021204792A3/fr

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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
    • B28B21/86—Cores
    • B28B21/88—Cores adjustable, collapsible or expansible
    • 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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding

Definitions

  • the present invention relates to a mold core for a molding device for producing hollow and / or in particular tubular concrete bodies and a molding device having such a molding core for producing hollow and / or in particular tubular concrete bodies. Furthermore, the present invention relates to a sealing element, in particular a strip-shaped sealing element, and / or a longitudinal strip forming such a sealing element for use on such a mold core.
  • Mold cores for molding devices for producing hollow and / or tubular concrete bodies have long been known in the prior art.
  • US Pat. No. 1,394,570 published in 1921 shows a generic mold core for use as an internal mold for a molding device for producing hollow and / or, in particular, tubular concrete bodies.
  • the mold core of US 1,394,570 has an expandable and / or expandable core jacket which, in the expanded and / or expanded state, assumes the predetermined internal shape for the concrete casting process and is designed to be shrinkable and / or contractible for demoulding the concrete body.
  • Such expandable mold cores are also regularly referred to as shrink cores in the prior art.
  • shrink cores facilitate the demoulding of a concrete body formed between an outer core jacket of the molding device and the shrink core, in that the shrink core can be shrunk from the expanded set-up state assumed during the concrete casting process and is thereby lifted off the inner wall of the concrete body.
  • the shrink core according to DE 102012220814 A1 has a substantially cylindrical core jacket, which has an opening running in the longitudinal direction on one side, at whose mutually opposite longitudinal edge sections a spreading device arranged in the interior of the core jacket engages around the opposite longitudinal edge sections of the core jacket for expanding the To push the shrink core apart in the tangential direction.
  • a connecting strip extending in the longitudinal direction is provided between the opposite longitudinal edge sections, which has at least one partially comprises elastomeric connecting web, which is connected to the longitudinal edges of the core jacket in a shear-proof manner.
  • an object of the present invention is to provide a mold core for a molding device for producing hollow and / or in particular tubular concrete bodies and a molding device having such a molding core for producing hollow and / or in particular to provide tubular concrete bodies in which a cost-effective arrangement that reliably seals the core mantle to the inside can also be provided, which enables improved service life, is able to reduce material fatigue and / or wear and / or allows easier handling in the event of material fatigue and / or wear .
  • the present invention relates to a mold core for a molding device for producing hollow and / or in particular tubular concrete bodies and a molding device having such a molding core for producing hollow and / or in particular tubular concrete bodies.
  • a mold core for a molding device for the production of hollow and / or in particular tubular concrete bodies according to claim 1 and a molding device comprising such a mold core for producing hollow and / or in particular tubular concrete bodies according to claim 15 are proposed to solve the above-mentioned object.
  • a sealing element for use on such a mold core according to claim 13 is proposed.
  • the dependent claims relate to exemplary preferred embodiments.
  • a mold core for use on a molding device for the production of hollow and / or in particular tubular concrete bodies comprising: a core jacket extending in the longitudinal direction, which is particularly preferably one (preferably at least from one end to the other end of the core jacket) between has two longitudinal edges of the core jacket running in the longitudinal direction of the core jacket, strip-shaped longitudinal opening, an expansion device for expanding and / or spreading and / or contracting and / or shrinking the mold core, and / or a sealing element sealing the longitudinal opening of the core jacket.
  • the sealing element is preferably provided as a flexible and / or elastically deforming sealing element when the mold core is contracted and / or shrunk, which when the mold core is in the shrunk or contracted state, in particular by bending, in particular around a longitudinal axis, preferably turns inside (or outside), in particular relative to the kernmantle.
  • one or more guide elements can be arranged on the side of the sealing element facing the interior of the mold core.
  • the expansion device can be set up to bring the mold core from the expanded or expanded state into the contracted or shrunk state in at least two consecutive shrinking processes.
  • the expansion device can preferably be set up to bring the mold core from the expanded or spread state to the contracted or shrunk state in at least two consecutive shrinking processes, so that at least one driver section of the expansion device in the transition from a first shrinking process the at least two consecutive shrinking processes to a second shrinking process the at least two consecutive shrinking processes with at least one driving portion which comes into contact with one or more guide elements of the sealing element, in particular for guiding the sealing element in (or during) the second shrinking process (and possibly in or during further shrinking processes).
  • the formulation of the two or more shrinking processes means in particular that the expansion device already partially shrinks or contracts the mold core in a first shrinking process and further shrinks or contracts the mold core from the partially shrunk or partially contracted state in at least one further shrinking process To bring the mold core into the contracted or shrunk state in the last of the at least two shrinking processes.
  • the expansion device can furthermore be set up to intervene on the one or more guide elements in the transition from the first to the second shrinking process and / or to come into contact or entrainment contact and, in the second shrinking process, the sealing element with the one or more guide elements, in particular with the engagement and / or contact with the one or more guide elements.
  • This has the advantage that no tensile forces are exerted on the sealing element in the first shrinking process, but the sealing element can advantageously be guided in the subsequent second shrinking process. This prevents due to the Avoidance of tensile forces acting on the sealing element and excessive wear of the sealing element.
  • one or more guide elements of the sealing element can each have a spacer sleeve, in particular a respective spacer sleeve with one of the at least one driver sections, the respective driver section of the spacer sleeve preferably being spaced from the side of the sealing element facing the interior of the mold core.
  • the at least one driver section of the expansion device can preferably be moved inwards relative to the mold core when contracting or shrinking the mold core and / or preferably come into contact with the at least one driver section of the respective spacer sleeve of the guide elements in the transition from the first to the second shrinking process , and / or the at least one driver section of the expansion device can preferably guide and / or take along the one or more guide elements of the sealing element in the second shrinking process.
  • This has the advantage that no tensile forces are exerted on the sealing element in the first shrinking process, but the sealing element can advantageously be guided in the subsequent second shrinking process. Due to the avoidance of tensile forces acting on the sealing element, this prevents excessive wear of the sealing element.
  • the expansion device can comprise a mold element which, in the expanded or spread state of the mold core, supports the shape of the side of the sealing element facing the interior of the mold core and / or is moved inward relative to the mold core when the mold core contracts or shrinks.
  • the shaped element can have the at least one driver section of the expansion device.
  • the shaped element can be a shaped sheet metal extending in the longitudinal direction of the mold core and the at least one driver section of the expansion device can be formed by a respective hole in the shaped sheet metal, through which the respective spacer sleeve of the guide element or the one or more guide elements can extend .
  • the at least one driving section of the respective spacer sleeve of the guide element or the one or more guide elements can be arranged on the side of the shaped sheet metal facing away from the sealing element.
  • the driving portion of the respective spacer sleeve of the guide element or the one or more guide elements have a distance from the side of the sealing element facing the interior of the mold core, which is preferably greater than the sheet metal thickness of the shaped sheet metal.
  • one or more guide elements can each have a stamp section on the side facing the sealing element, which preferably engages and / or is fitted into a groove section of the sealing element, the groove section of the sealing element particularly preferably having a substantially T-shape in cross-sectional profile .
  • the stamp section can engage and / or be fitted into the groove section of the sealing element in a direction transverse to the longitudinal direction of the mold core in a form-fitting manner, particularly preferably in the radial direction of the mold core and / or essentially perpendicular to the radial direction of the mold core.
  • the stamp section of the respective guide element can engage in the groove section of the sealing element in a displaceable manner in the longitudinal direction of the mold core.
  • the sealing element can have a connecting web, on which a guide strip having the groove section and extending in the longitudinal direction of the mold core is preferably arranged.
  • a sealing element (which can also be provided as a spare part, for example) is proposed for use on a mold core according to one of the preceding exemplary embodiments, wherein the sealing element can preferably be fastened to the respective longitudinal edges of the longitudinal opening of the core jacket by means of a releasable connection.
  • one or more guide elements can be arranged on the side of the sealing element facing the interior of the mold core (in the fastened state).
  • the sealing element or the one or more guide elements can be set up and / or designed in such a way that at least one at least one driver section of the expansion device in the transition from a first shrinking process of the at least two consecutive shrinking processes to a second shrinking process of the at least two successive ones executed shrinking processes with at least one driving section which comes or can come into contact with one or more guide elements of the sealing element (in the attached state), in particular for guiding the sealing element in (or during) the second shrinking process (and possibly in or during further shrinking processes ).
  • one or more guide elements of the sealing element can each have a spacer sleeve, in particular a respective spacer sleeve with one of the at least one driver sections, the respective driver section of the spacer sleeve preferably being spaced from the side of the sealing element facing the interior of the mold core.
  • the at least one driving section of the respective spacer sleeve of the guide element or the one or more guide elements can be arranged on the side of the shaped sheet metal facing away from or facing away from the sealing element (in the installed or attached state of the sealing element).
  • one or more guide elements can each have a stamp section on the side facing the sealing element, which preferably engages and / or is fitted into a groove section of the sealing element, the groove section of the sealing element particularly preferably having a substantially T-shape in cross-sectional profile .
  • the stamp section can engage and / or be fitted into the groove section of the sealing element in a direction transverse to the longitudinal direction of the mold core in a form-fitting manner, particularly preferably in the radial direction of the mold core and / or essentially perpendicular to the radial direction of the mold core.
  • the stamp section can engage and / or be fitted into the groove section of the sealing element in a direction transverse to the longitudinal direction of the mold core in a form-fitting manner, particularly preferably in the radial direction of the mold core and / or essentially perpendicular to the radial direction of the mold core.
  • the punch section of the respective guide element can be slidably engaged or fitted into the groove section of the sealing element in the longitudinal direction of the mold core or of the sealing element.
  • Sealing element have a connecting web, on which a guide strip having the groove section and extending in the longitudinal direction of the mold core or of the sealing element is preferably arranged.
  • a molding device for the production of hollow and / or in particular tubular concrete bodies comprising an outer shape and an inner shape that is preferably arranged and / or can be arranged in the outer shape, which is preferably a mold core according to one of the above aspects and / or exemplary embodiments includes. Further preferred, exemplary embodiments which can be combined with the above aspects are described below.
  • the sealing element can be connected to the core jacket so as to be displaceable in the longitudinal direction, and particularly preferably the sealing element can be connected to the two longitudinal edges of the core jacket so as to be displaceable in each case in the longitudinal direction.
  • the sealing element can be attached to the respective longitudinal edges of the core jacket by means of a respective releasable connection.
  • This has the advantage that the sealing element can be removed easily, efficiently and inexpensively due to the detachable connection, in order to replace it with another sealing element (spare part) if necessary, e.g. without having to remove the mold core from the molding device.
  • the sealing element can, in particular, be held on the mold core so that it can be pulled out of the mold core in the longitudinal direction.
  • the sealing element on the mold core can be pulled out of the longitudinal opening of the core jacket in the longitudinal direction and / or, for example, be held so that it can be pulled out between the longitudinal edges of the core jacket, in particular be held so that it can be pulled out in the longitudinal direction at the longitudinal edges of the core jacket.
  • the sealing element can be connected with its longitudinal edges on the respective longitudinal edges of the core jacket so as to be displaceable in the longitudinal direction (in each case).
  • respective longitudinal edges of the sealing element facing the longitudinal edges of the core jacket can each be connected to the respective longitudinal edges of the core jacket so as to be displaceable in the longitudinal direction.
  • the sealing element can be positively connected to (and / or with) the respective longitudinal edges of the core jacket in the direction transverse to the longitudinal direction of the mold core, particularly preferably in the essentially radial direction of the mold core and / or essentially perpendicular to the radial direction of the Mandrel relative to the mandrel.
  • the sealing element can be positively connected to (and / or with) the respective longitudinal edges of the core jacket in essentially all directions transverse to the longitudinal direction of the mold core, particularly preferably in the essentially radial direction of the mold core inwards and / or outwards and / or substantially in both directions perpendicular to the radial direction of the mandrel relative to the mandrel.
  • This has the advantage that the sealing element can be held (preferably sealingly) in such a way that essentially only the longitudinal direction remains as a translational degree of freedom.
  • the sealing element can have lateral, longitudinally extending and / or laterally fastened connecting strips, which can preferably be held displaceably in the longitudinal direction on the longitudinal edges of the core jacket, in particular on respective fastening strips fastened to the longitudinal edges of the core jacket.
  • the connecting strips of the sealing element can have one or more longitudinally extending profile groove sections into which preferably respective corresponding profile rail sections of the longitudinal edges, in particular the fastening strips attached to the longitudinal edges of the core jacket, engage displaceably in the longitudinal direction.
  • the connecting strips of the sealing element can have one or more profile rail sections extending in the longitudinal direction, which can preferably engage slidably in the respective corresponding profile groove sections of the longitudinal edges, in particular the fastening strips attached to the longitudinal edges of the core jacket.
  • one or more profile groove sections and / or their corresponding one or more profile rail sections can have a T-shape in the cross-sectional profile.
  • the sealing element can have a flexibly and / or elastically bendable connecting web, which can particularly preferably comprise an elastic plastic, in particular an elastomer.
  • the connecting web of the sealing element can be arranged between the connecting strips of the sealing element and / or on both sides with the Connecting strips be connected.
  • the connecting web of the sealing element can be fastened to the connecting strips by means of a non-positive connection, particularly preferably by means of an adhesive connection.
  • the connecting strips of the sealing element can each have one or more retaining profile sections, in particular anchor and / or nose profile sections, protruding into and / or engaging in the material of the connecting web in the cross-sectional profile.
  • at least one of the connecting strips of the sealing element can have, in the cross-sectional profile, a plurality of retaining profile sections which are oriented transversely to one another and / or protrude into the material of the connecting web and / or engage.
  • a sealing element (which can also be provided as a spare part, for example) is proposed for use on a mold core according to one of the preceding exemplary embodiments, the sealing element or its lateral longitudinal edges (in particular, the longitudinal edges of the core jacket) being / are preferably set up for this purpose to be connected to the longitudinal edges of the core jacket so as to be displaceable in the longitudinal direction, and particularly preferably to be attachable to respective longitudinal edges of the core jacket by means of a respective releasable connection.
  • the sealing element or its lateral longitudinal edges can be designed to be connected to the core jacket so that it can be displaced in the longitudinal direction, particularly preferably the sealing element with the two longitudinal edges of the core jacket can each be displaced in the longitudinal direction be connected.
  • the sealing element or its lateral longitudinal edges can be configured to be attached to (and / or with) respective longitudinal edges of the core jacket by means of a respective releasable connection.
  • the sealing element or its lateral longitudinal edges can be designed to be held in particular on the mold core such that it can be pulled out of the mold core in the longitudinal direction.
  • the sealing element or its lateral longitudinal edges can be configured to be able to be pulled out of the longitudinal opening of the core jacket on the mold core in the longitudinal direction and / or, for example, between the To be held pull-out longitudinal edges of the core jacket, in particular to be held pull-out in the longitudinal direction at the longitudinal edges of the core jacket.
  • the sealing element can with its lateral (in particular facing the longitudinal edges of the core jacket) longitudinal edges or its lateral (in particular the longitudinal edges of the core jacket)
  • Longitudinal edges can be set up to be connected to (and / or with) the respective longitudinal edges of the core jacket so as to be displaceable in the longitudinal direction.
  • respective longitudinal edges of the sealing element facing the longitudinal edges of the core jacket can each be configured to be connected to the respective longitudinal edges of the core jacket so as to be displaceable in the longitudinal direction.
  • the sealing element can with its lateral (in particular facing the longitudinal edges of the core jacket) longitudinal edges or its lateral (in particular the longitudinal edges of the core jacket)
  • Longitudinal edges be set up to be connected positively to (and / or with) the respective longitudinal edges of the core jacket in the direction transverse to the longitudinal direction of the mold core, particularly preferably in the essentially radial direction of the mold core and / or essentially perpendicular to the radial direction of the mold core relative to the mandrel.
  • the sealing element with its lateral longitudinal edges (in particular facing the longitudinal edges of the core jacket) or its lateral longitudinal edges (in particular the longitudinal edges of the core jacket) can be set up at (and / or with) the respective longitudinal edges of the core jacket in substantially all of them Directions transverse to the longitudinal direction of the mold core in each case to be positively connected, particularly preferably in a substantially radial direction of the mold core inward and / or outward and / or substantially in both directions perpendicular to the radial direction of the mold core relative to the mold core.
  • the sealing element can have lateral, longitudinally extending (for example, along the longitudinal edges of the sealing element and / or the longitudinal edges of the sealing element) and / or laterally attached connecting strips, which are preferably set up on the longitudinal edges of the core jacket, in particular to be held displaceably in the longitudinal direction on respective fastening strips attached to the longitudinal edges of the core jacket.
  • the connecting strips of the sealing element can have one or more profile groove sections extending in the longitudinal direction have, in which preferably respective corresponding profile rail sections of the longitudinal edges, in particular of the fastening strips attached to the longitudinal edges of the core jacket, can engage displaceably in the longitudinal direction.
  • the connecting strips of the sealing element can have one or more profile rail sections extending in the longitudinal direction, which can preferably engage slidably in the respective corresponding profile groove sections of the longitudinal edges, in particular the fastening strips attached to the longitudinal edges of the core jacket.
  • one or more profile groove sections and / or their corresponding one or more profile rail sections can have a T-shape in the cross-sectional profile.
  • the sealing element can have a flexibly and / or elastically bendable connecting web, which can particularly preferably comprise an elastic plastic, in particular an elastomer.
  • the connecting web of the sealing element can be arranged between the connecting strips of the sealing element and / or connected to the connecting strips on both sides.
  • the connecting web of the sealing element can be fastened to the connecting strips by means of a non-positive connection, particularly preferably by means of an adhesive connection.
  • the connecting strips of the sealing element can each have one or more retaining profile sections, in particular anchor and / or nose profile sections, protruding into and / or engaging in the material of the connecting web in the cross-sectional profile.
  • at least one of the connecting strips of the sealing element can have, in the cross-sectional profile, a plurality of retaining profile sections which are oriented transversely to one another and / or protrude into the material of the connecting web and / or engage.
  • a molding device for the production of hollow and / or in particular tubular concrete bodies comprising an outer shape and an inner shape that is preferably arranged and / or can be arranged in the outer shape, which is preferably a mold core according to one of the above aspects and / or exemplary embodiments includes.
  • FIG. 1 shows an exemplary perspective illustration of a molding device for producing tubular concrete bodies according to an exemplary embodiment of the present invention
  • FIG. 2 shows an exemplary top view of the exemplary molding device according to FIG. 1,
  • FIG. 3 shows an exemplary cross-sectional illustration of the exemplary molding device according to FIG. 1 (section A-A according to FIG. 2),
  • FIG. 4 shows an exemplary perspective illustration of a mold core of a molding device for producing tubular concrete bodies according to an exemplary embodiment of the present invention
  • FIG. 5 shows an exemplary top view of the exemplary mold core according to FIG. 4
  • FIG. 6 shows an exemplary longitudinal sectional view of the exemplary mold core according to FIG. 3 (section B-B according to FIG. 5)
  • FIG. 7 shows an exemplary perspective illustration of an exemplary expansion device of a mold core of a molding device for the production of tubular concrete bodies according to an exemplary embodiment of the present invention
  • FIG. 8 shows an exemplary front view of the exemplary expansion device according to FIG. 7,
  • FIG. 9 shows an exemplary top view of the exemplary expansion device according to FIG. 7,
  • FIG. 10 shows an exemplary longitudinal side view of the exemplary expansion device according to FIG. 7,
  • FIG. 11 shows an exemplary cross-sectional view of the exemplary expansion device according to FIG. 7 (section C-C according to FIG. 10),
  • 12A shows an exemplary profile view of a sealing element for use on a mold core according to an exemplary embodiment of the present invention
  • 12B shows an exemplary profile view of a sealing element for use on a mold core according to a further exemplary embodiment of the present invention
  • FIG. 12C shows an exemplary profile view of a sealing element for use on a mold core according to a further exemplary embodiment of the present invention.
  • FIG. 12D shows an exemplary profile view of a sealing element for use on a mold core according to a further exemplary embodiment of the present invention.
  • FIG. 1 shows an exemplary perspective illustration of a molding device 1000 for producing tubular concrete bodies according to an exemplary embodiment of the present invention.
  • FIG. 2 shows an exemplary top view of the exemplary molding device 1000 according to FIG. 1.
  • FIG. 3 shows an exemplary cross-sectional illustration of the exemplary molding device 1000 according to FIG. 1 (section AA from FIG. 2).
  • the forming device 1000 is set up here to produce cylindrical concrete pipes which have an essentially circular cross-section with a wall thickness that is essentially constant over the circumference (ie, for example, with essentially coaxial circular inner and outer cross-sectional shapes).
  • the molding device 1000 of the embodiment according to FIGS. 1, 2 and 3 comprises, by way of example, a stand section 100 on which an external mold 200 comprising two external mold sections 210 and 220 is arranged.
  • the two outer shape sections 210 and 220 are essentially designed as semi-hollow cylindrical elements which, when put together, form the hollow cylindrical outer shape 200, for example.
  • the outer shape can be composed of two or more identical and / or differently shaped outer shape sections.
  • the outer shape sections 210 and 220 of the outer shape 200 of the exemplary embodiment according to FIGS. 1 and 2 are arranged by way of example on respective slide sections 211 and 221.
  • the slide sections 211 and 221 mounted displaceably on rails 110 and 120 arranged by way of example on the stand section 100, the outer mold sections 210 and 220 for demolding a concrete body B produced by the molding device 1000 from the set-up state shown in FIG.
  • the outer mold sections 210 and 220 can be moved towards one another and / or brought together again in order to be assembled and / or fastened to one another in the set-up state shown as an example in FIG. 1.
  • the inner wall of the outer mold sections 210 and 220 essentially forms a cylindrical shape (Flohl cylinder inner wall), which at least partially shapes the outer wall of the concrete body to be produced.
  • the molding device 1000 of the embodiment according to FIGS. 1, 2 and 3 furthermore comprises, for example, a mold core 300 that forms the inner shape.
  • the mold core 300 and / or its outer shape for example, essentially forms a (standing) cylindrical shape which at least partially shapes the inner wall of the concrete body B to be produced.
  • concrete can be poured into the space formed between the outer mold 200 and the mold core 300 in order to form the concrete body B to be produced (see, for example, FIGS. 2 and 3).
  • the molding device 1000 is used to form essentially cylindrical concrete pipes in an upright position.
  • the mold core 300 of the molding device 1000 is designed as a shrink core, which has an expansion device 400 (expanding and / or shrinking device) arranged in the hollow cylindrical interior of the mold core 300 (see FIG. 2, not shown in FIGS. 1 and 3).
  • the expansion device 400 extends by way of example inside the mold core 300, in particular by way of example in the longitudinal direction of the mold core 300, ie in the present exemplary embodiment vertically in the case of the example standing Mold core 300 in FIG. 1.
  • the longitudinal direction of the mold core is defined here, for example, by the longitudinal direction of the hollow and / or tubular concrete bodies or concrete pipes to be produced.
  • the expansion device 400 is set up, by way of example, to spread (expand) the mold core 300 in order to form the set-up state for the concrete casting process and / or to shrink (contract) the mold core 300 for demoulding the concrete body B.
  • essentially cylindrical concrete pipes can be poured upright only by way of example.
  • the outer shape and / or the inner shape, ie for example the inner mold core, of the molding device deviate from the cylindrical shape and / or the essentially circular cross section.
  • embodiments with mold cores with an oval cross-section or an angular cross-section, possibly with rounded corners, are also possible. Consequently, further embodiments with other internal and / or external shapes can be provided in which hollow and / or tubular concrete bodies can be produced whose external and / or internal shape deviates from the circular shape in cross-section, e.g. with oval, elliptical, angular (possibly . With rounded corners) Cross-sectional shapes outside and / or inside and / or with inner and / or outer shape centers deviating from the coaxial arrangement.
  • the cross-sectional shape of the inner wall of the outer shape and / or the cross-sectional shape of the outer wall of the mold core or the inner shape can differ from the circular shape.
  • the outer mold 200 can, for example, comprise a cover element, possibly a circular and / or ring-shaped cover element, which covers the concrete body B hardening in the mold from above after the casting process, and / or a tensioning device that holds the outer mold 200 and the Inner mold and / or the mold core 300 in the set-up state and / or fastened for the casting process in an exciting manner.
  • the expansion device 400 is hydraulically controlled and / or can be operated hydraulically, in further exemplary embodiments, in addition to one or more hydraulic mechanisms, other mechanisms can also be used as an additional or alternative, for example by means of a mechanical, hydraulic, pneumatic and / or electrical and / or or electromagnetic control.
  • 4 shows an exemplary perspective illustration of a mold core 300 of a molding device 1000 for producing hollow and / or in particular tubular concrete bodies according to an exemplary embodiment of the present invention.
  • the mold core 300 in the molding device 1000 according to FIGS. 1 to 3 can be used.
  • the mold core 300 has the expansion device 400 inside, analogously to FIG. 2.
  • the mold core 300 comprises, for example, a substantially cylindrical core jacket 310 (can also be referred to as a mold jacket or mold core jacket), which extends, for example, on one side in the longitudinal direction of the mold core 300, from one end to the other end of the mold core 300 and / or over the entire length of the mold core 300 Has the length of the mold core extending, strip-shaped opening (longitudinal opening), on which, for example, a strip-shaped sealing element 500 that seals and / or closes the opening is arranged.
  • a substantially cylindrical core jacket 310 can also be referred to as a mold jacket or mold core jacket
  • the strip-shaped sealing element 500 extends (preferably at least) essentially from one end to the other end of the mold core 300, in particular in the longitudinal direction of the mold core, and / or for example (preferably at least) over the entire length of the mold core 300 along the longitudinal opening of the core jacket 310 , especially in the longitudinal direction of the mandrel.
  • the strip-shaped sealing element 500 has on its longitudinal edges, for example, connecting strips 511 and 512 which extend in the longitudinal direction and which the sealing element 500 with the respective longitudinal edges 311 and 312 of the strip-shaped longitudinal opening of the core jacket
  • FIG. 4 shows the mold core 300 in the spread and / or expanded state in which the core jacket 310 is expanded, for example in such a way that the longitudinal edges 311 and 312 of the strip-shaped longitudinal opening of the core jacket 310 are pressed apart, in particular controlled and / or driven by, for example The expansion device 400.
  • fastening elements 321 to 324 are shown on the underside of the mold core 300 by way of example, with which the mold core 300 can be fastened standing on and / or on the stand section 100 of the molding device 1000 between the outer mold sections 210 and 220 of the outer mold 200 is.
  • FIG. 5 shows an exemplary top view of the exemplary embodiment of the mold core 300 according to FIG. 4.
  • the exemplary expansion device 400 arranged by way of example inside the mold core 300 is shown (e.g. analogous to FIG. 2).
  • the expansion device 400 is operated hydraulically, for example, and is set up, for example, to spread and / or expand the mold core 300, for example by removing the longitudinal edges
  • 311 and 312 of the core jacket 310 can be pressed apart by an expansion mechanism of the expansion device 400, for example hydraulically controlled, or moved apart by expansion of the core jacket 310.
  • Expansion device 400 is set up, for example, to shrink and / or contract the mold core 300 by the longitudinal edges 311 and 312 being moved towards one another and / or towards one another in a hydraulically controlled manner by the expansion mechanism of the expansion device 400, for example, or by contracting the core jacket 310 be moved.
  • 5 shows, by way of example, the expanded and / or spread state of the mold core 300, the longitudinal edges 312 and 312 of the strip-shaped longitudinal opening of the core jacket 310 being pressed apart by way of example.
  • the sealing element 500 which seals the mold core 300 from the outside inwards against the ingress of liquid, is arranged, for example, on the longitudinal sides of which the connecting strips 511 and 512, the sealing element 500 with the respective longitudinal edges 311 and 312 of the Connect the longitudinal opening of the core jacket 310 in a sealing manner.
  • An exemplary expansion mechanism of the expansion device 400 and its exemplary mode of operation according to an exemplary embodiment is shown in FIGS. 6 to 11 described in more detail.
  • FIG. 6 shows an exemplary longitudinal sectional illustration of the exemplary mold core 300 according to FIG. 3 (section B-B according to FIG. 5).
  • FIG. 6 shows, by way of example, the expansion device 400 in the interior of the mold core 300, the expansion device 400 extending, for example, in the longitudinal direction from one end of the mold core 300 to the other end.
  • the expansion device 400 comprises two hydraulically actuated expansion mechanisms 400A and 400B of identical construction at different positions inside the mold core 300.
  • only one or more than two expansion mechanisms can also be provided, e.g. also depending on the length of the mold core.
  • the expansion mechanisms 400A and 400B are each set up, for example, to move the sword element 410 of the expansion device 400, which for example extends in the longitudinal direction, for example in the radial direction of the essentially cylindrical core jacket 310.
  • the further exemplary mode of operation of the expansion device 400 and / or expansion mechanisms 400A and 400B is described in the following with the aid of an exemplary embodiment, merely by way of example.
  • the expansion device 400 comprises, by way of example, two hydraulically actuatable expansion mechanisms 400A and 400B. It can be in In further exemplary embodiments, only one or more than two expansion mechanisms can also be provided, for example also depending on the length of the mold core.
  • FIG. 8 shows an exemplary front view of the exemplary expansion device 400 according to FIG. 7, in particular, by way of example, in the spread and / or expanded state.
  • 9 shows an exemplary top view of the exemplary expansion device 400 according to FIG. 7.
  • FIG. 10 shows an exemplary longitudinal side view of the exemplary expansion device 400 according to FIG. 7.
  • the expansion device 400 comprises, for example, two fastening strips 421 and 422 extending parallel to one another in the longitudinal direction, which, for example, can be fastened and / or fastened in a parallel arrangement to the parallel extending longitudinal edges 311 and 312 of the strip-shaped longitudinal opening of the core jacket 310 (see, for example, FIGS. 4 and 5).
  • the expansion mechanisms 400A and 400B are each fastened by way of example on both sides in the longitudinal direction one behind the other via respective screw connections S1 and S2 to the fastening strips 421 and 422 and / or screw-connected to them.
  • the fastening strips 421 and 422 serve merely as an example as a means for fastening the expansion device 400 to the core jacket 310 or to the longitudinal edges 311 and 312 of the core jacket 310, and also merely by way of example for fastening or connecting the sealing element 500 or the connecting strips 511 and 512 of the sealing element 500 on / with the longitudinal edges 311 and 312 of the strip-shaped longitudinal opening of the core jacket 310 (see, for example, FIG. 5).
  • the expansion mechanism of the expansion device 400 shown in FIG. 8 (and analogously the expansion mechanisms 400A and 400B of identical construction) comprises, for example, a hydraulic cylinder 430, the hydraulically controllable piston 431 of which, for example, has a lever element 440 extending transversely to the piston 431 and transversely to the longitudinal direction of the expansion device 400 is connected, in particular by way of example via a screw connection S3.
  • the hydraulic cylinder 430 and / or a carrier element 470 carrying the hydraulic cylinder 430 is connected, for example, to the sword element 410 extending transversely to the axis of the hydraulic cylinder 430.
  • Push rod elements 451 and 452 are fastened by way of example to both end sections 441 and 442 of the lever element 440 and / or to both opposite sides of the lifting element 440.
  • the push rod elements 451 and 452 are connected at both ends by means of swivel joints Lll and L12 and at the swivel joints Lll and L12 by an essentially perpendicular to the push rod elements 451 and 451 and / or parallel to the longitudinal direction of the Expansion device 400 aligned respective axes of rotation rotatably and / or pivotably mounted and / or held.
  • the push rod elements 451 and 452 extend, for example, parallel to one another and parallel to the piston 431 of the hydraulic cylinder 430 and / or parallel to the axis of the hydraulic cylinder 430, which is oriented transversely to the longitudinal direction of the expansion device 400 Ends and / or on the side facing away from the lever element 440 are connected to respective fastening sections 461 and 462, the fastening sections 461 and 462 being each connected to the fastening strips 421 and 422, for example, and / or being fastened to these opposite one another via the screw connections S1 and S2.
  • respective spacer elements 481 and 482 are fastened to the fastening sections 461 and 462 by means of swivel joints L31 and L32, the respective other ends of the spacer elements 481 and 482 being fastened to the sword element 410 on opposite sides in the transverse direction of the sword element 410 via respective swivel joints L41 and L42 .
  • the spacer elements 481 and 482 are each mounted and / or pivotable on the swivel joints L31, L32, L41 and L42 about a respective axis of rotation that is essentially perpendicular to the push rod elements 451 and 452 and / or parallel to the longitudinal direction of the expansion device 400 held.
  • the spacer elements 481 and 482 are always aligned with their own longitudinal direction, for example, always transversely to the longitudinal direction of the expansion device 400. It should be mentioned at this point that the longitudinal direction of the expansion device 400 in FIG. 8 is arranged, for example, perpendicular to the plane of the drawing. Because of the rotatable mounting on the joints L31, L32, L41 and L42, the spacer elements 481 and 482 can on the one hand be pivoted relative to one another and also be pivoted relative to the push rods 451 and 452 at the same time.
  • the spacer elements 481 and 482 are aligned, for example, with their own longitudinal direction parallel and / or axially to one another and, for example, transversely to the push rods 451 and 452. Due to the axial alignment with one another, the joints L31 to L41 and / or L32 to L42 (and thus the joints L31 to L32) are at a maximum distance from one another on both sides of the expansion mechanism 400. Thus, in the state shown in FIG.
  • the opposing fastening sections 461 and 462 are, for example, maximally spaced from one another and the fastening strips 421 and 422 (and thus also the longitudinal edges 311 and 312 of the core jacket 310 fastened to them) are pressed apart maximally spaced. This causes the core jacket 310 to spread and / or is expanded.
  • the hydraulic cylinder 430 can be actuated to retract the piston 431 so that the sword element 410 is moved towards the lever element 440, ie in particular in the inward direction relative to the mold core 300.
  • the fastening of the exemplary sealing element 500 is also shown by way of example.
  • the sealing element 500 is fastened, for example, to the respective fastening strips 421 and 422 by means of the connecting strips 511 and 512 of the sealing element 500 and / or connected to them in a sealing manner.
  • the fastening strips 421 and 422 serve merely as an example as a means for fastening the expansion device 400 to the core jacket 310 or to the longitudinal edges 311 and 312 of the core jacket 310, and also merely by way of example for fastening or connecting the sealing element 500 or the connecting strips 511 and 512 of the sealing element 500 on / with the longitudinal edges 311 and 312 of the strip-shaped longitudinal opening of the core jacket 310 (see, for example, FIG. 5).
  • the profiles of the connecting strips 511 and 512 of the sealing element 500 have, for example, groove sections 511a and 512a running in the longitudinal direction, which for example have a T-shape in cross-sectional profile (see also FIGS. 12A to 12D).
  • the fastening strips 421 and 422 have, for example, corresponding profile rails 421a and 422a running in the longitudinal direction, which are designed to engage in the respective groove sections 511a and 512a of the connecting strips 511 and 512 of the sealing element 500 and / or to be pushed into them in the longitudinal direction, see above that the profile rails 421a and 422a, for example having a T-shape in profile, are each fastened to the groove sections 511a and 512a and / or to the connecting strips 511 and 512 of the sealing element 500 and / or are sealingly connected to them.
  • the connecting strips 511 and 512 of the Sealing element 500 as well as the profile rails 421a and 422a of the fastening strips 421 and 422 run, for example, in the longitudinal direction parallel to the longitudinal edges 311 and 312 of the core jacket 310 and are preferably mutually displaceable in the longitudinal direction, but preferably connected in a form-fitting manner in the transverse direction and / or transverse to the longitudinal direction.
  • the connecting strips 511 and 512 of the sealing element 500 are, for example, each connected to the fastening strips 421 and 422 so as to be displaceable in the longitudinal direction, with the movement transverse to the longitudinal direction preferably being blocked in a form-fitting manner (that is, for example, a remaining translational degree of freedom).
  • sealing element 500 can be exchanged easily and inexpensively, for example in the event of wear and tear, in that the sealing element 500 is held on the fastening strips 421 and 422 such that it can be pulled out in the longitudinal direction.
  • the sealing element 500 can advantageously simply be pulled out of the longitudinal opening of the core jacket 310 in the longitudinal direction and an identical sealing element 500 and / or a sealing element having similar connecting strips 511 and 512 can be inserted in the longitudinal direction.
  • the sealing element 500 is set up, for example, to seal the interior of the mold core 300 in the concrete casting process and to prevent the penetration of liquid into the interior of the mold core 300.
  • the sealing element 500 has, for example, a connecting web 520 arranged between the connecting strips 511 and 512 and connected to the connecting strips 511 and 512, which, for example, is flexible and / or preferably elastically bendable (particularly preferably bendable or deformable about a longitudinal axis of the sealing element 500 ).
  • the connecting web 520 can consist of an elastically bendable or elastically formable material, such as, for example, an elastic plastic, and / or comprise a section consisting of an elastically bendable material, such as, for example, an elastic plastic.
  • the connecting web 520 comprises an elastomer and / or the connecting web 520 consists of elastomer.
  • the round shape of the elastic connecting web 520 (see also FIG and / or the side facing away from the hydraulic cylinder 430) is attached (see, for example, also FIG. 6).
  • the sword element 410 is pulled inwards by means of the expansion device 400 during the shrinking of the mold core 300, the molded sheet 490 also lifts off the elastic connecting web 520 of the sealing element 500 and is pulled inwards, for example.
  • the Longitudinal edges 311 and 312 of the core jacket 310 are pressed together by way of example, so that the connecting strips 511 and 512 of the sealing element 500 are also pressed together by way of example.
  • this furthermore leads, for example, to an inward bending of the elastic connecting web 520 of the sealing element 500.
  • the outward bending of the elastic connecting web 520 of the sealing element 500 is prevented in this process (eg when removing the formwork from a hardened concrete body) by the inner surface of the hardened concrete body B lying on the outside of the sealing element 500.
  • FIG. 11 shows an exemplary cross-sectional view of the exemplary expansion device 400 according to FIG. 7 (section CC according to FIG. 10).
  • the illustration is analogous to FIG. 8 through the top view of the expansion mechanism 400B.
  • bores 421b and 422b are shown on the fastening strips 421 and 422, to which the fastening strips 421 and 422 (and thus the expansion device 400) can be fastened to fastening strips on the longitudinal edges 311 and 312 of the core jacket 310.
  • an exemplary guide element 600D is shown in FIG. 11.
  • Such guide elements 600A to 600E are held, for example, one behind the other in the longitudinal direction at several positions in the center of the guide plate 490 (see also FIGS.
  • the guide element 600D has for example, on the side of the shaped sheet metal 490 facing the sealing element 500, a punch section 601 which is fastened, for example, with a screw 602 extending through the respective bore of the shaped sheet metal 490.
  • the screw 602 also extends through a spacer sleeve 603, which also extends, for example, through the respective bore of the shaped plate 490, but on the side of the shaped plate 490 facing away from the sealing element 500, for example, has an enlarged diameter driver portion 603a.
  • the sealing element 500 has, for example, in the center on the side facing the interior of the mold core 300, for example, a profile strip 530 extending in the longitudinal direction, which is fastened, for example, to the connecting web 520 of the sealing element 500.
  • the profile strip 530 has, for example, a receiving groove 530a, which is open inward toward the inside of the mold core, for the punch sections 610 of the guide elements 600A to 600E (see also FIG. 12).
  • the receiving groove 530a of the profile strip 530 has, for example, a T-shape in the cross-sectional profile (see e.g. also Fig. 12), which is adapted, for example, to the cross-sectional profile of the punch section 601 of the guide elements 600A to 600E.
  • the sword element 410 and thus also the molded sheet 490 is drawn radially into the interior of the mold core 300, the molded sheet 490 moves inward and lifts off the connecting web 520 of the sealing element 500.
  • the shaped sheet 490 moves inward (upward in Fig.
  • a stroke distance preset for example, with the length of the spacer sleeve 603 and / or the screw length of the screw 602, until the top of the shaped sheet 490 comes into contact with the driver section 603a of the spacer sleeve 603 comes and takes the spacer sleeve 603 and / or the driver section 603a of the spacer sleeve 603 with it, so that after the movement of the exemplarily preset stroke distance (without tensile forces acting on the sealing element 500) the guide elements 600A to 600E carried along by the shaped sheet 490 via the in the profile strip 530 introduced punch sections 601 guide the sealing element 500 and / or its bending inward in the shrinking process.
  • the expansion device is hereby set up, for example, to carry out the shrinking process in two steps and / or two-stage shrinking, in particular with preferably a single continuous stroke movement of the mechanism driving both shrinking steps, here, for example, by the hydraulic cylinder 430.
  • the sword element 410 eg first stage of the continuous shrinking process
  • the shaped sheet 490 retracted radially into the interior of the mold core 300, the shaped sheet 490 moving inward and lifting off the connecting web 520 of the sealing element 500, for example without exerting tensile force on the sealing element 500 in this first step.
  • the top of the shaped sheet 490 comes into contact with the driver section 603a of the spacer sleeve 603 (transition to the second step and / or to the second stage of the continuous shrinking process) and the shaped sheet 490 then, for example, takes the spacer sleeve 603 and / or the driver portion 603a of the spacer sleeve 603 with it in the second step, so that in the second step, the sealing element 500 is now additionally carried along with the shrinking movement of the mandrel 300 driven by the same drive mechanism, for example.
  • the same drive for example the hydraulic cylinder
  • the sealing element 500 and / or the flexibly and / or elastically bendable connecting web 520 of the sealing element 500 is not pulled inwards, but rather with the advantageous avoidance of tensile forces acting on the connecting web 520 by pushing the Longitudinal edges 311 and 312 of the core jacket 310 is bent inwards, the bending of the sealing element 500 also being advantageously guided by the guide elements 600A to 600E and kept in the shrunk state.
  • the sealing element 500 preferably has a strip-shaped shape, the longitudinal edges of the strip-shaped sealing element 500 being provided, for example, with the connecting strips 511 and 512, which are located opposite one another on the flexibly and / or elastically bendable (preferably strip-shaped) connecting web 520 arranged between the connecting strips 511 and 512 of the sealing element 500 are attached, for example by means of an adhesive connection or at least supported by an adhesive connection.
  • the connecting strips 511 and 512 have the receiving grooves 511a and 512a, which are open laterally to the outside, for receiving the rail profiles 421a and 422a of the fastening strips 421 and 422 for sealing attachment to the mold core 300 and / or to the core jacket 310.
  • the receiving grooves 511a and 512a have, for example, a T-shape in cross-sectional profile.
  • the sealing element 500 also has, for example, a profile strip 530 extending in the longitudinal direction, which is fastened, for example, to the connecting web 520 of the sealing element 500.
  • the profile strip 530 has, for example, an outwardly open receiving groove 530a for receiving the punch sections 610 of the guide elements 600A to 600E described above.
  • the profile strip 530 is embedded in the connecting web 520 of the sealing element 500 in such a way that the outside of the profile bar 530, for example, ends with the outside of the connecting web 520 of the sealing element 500 and does not and / or does not protrude substantially beyond it.
  • the profile strip 530 can be connected to the connecting web 520 of the sealing element 500 by means of a force-fit connection (eg adhesive connection) or at least supported by a force-fit connection.
  • the profile strip 530 has, for example, laterally protruding profile webs 530b in order to strengthen the connection between the profile strip 530 and the connecting web 520 and to avoid and / or prevent the connection from being torn off when the connecting web 520 is repeatedly bent.
  • the connecting strips 511 and 512 can also use, for example, profile sections protruding into the material of the connecting web 520 (possibly analogous to the profile webs 530b of the profile strip 530). This improves the longevity of the Connection of the connecting web 520 to the connecting strips 511 and 512 over the entire length of the sealing element 500 and thus prevents partial tearing at the edges, even if the sealing element 500 is used multiple times in shrinking and / or expansion processes on the mold core 300.
  • FIG. 12B shows an exemplary profile view of a sealing element 500 for use on a mold core 300 according to a further exemplary embodiment of the present invention.
  • the features from FIG. 12A are taken up here by way of example.
  • the connecting strips 511 and 512 have, for example, respective anchor profile sections 511b and 512b protruding into the material of the connecting web 520.
  • FIG. 12C shows an exemplary profile view of a sealing element 500 for use on a mold core 300 according to a further exemplary embodiment of the present invention.
  • the features from FIG. 12B are taken up by way of example, with the profile strip 530 being dispensed with by way of example (elements 600A to 600E can then be left out in the expansion device).
  • the connecting strips 511 and 512 again have, for example, respective anchor profile sections 511b and 512b protruding into the material of the connecting web 520.
  • the connecting strips 511 and 512 have, for example, respective nose profile sections 511c and 512c which protrude into the material of the connecting web 520 and which, for example, protrude transversely to the anchor profile sections 511b and 512b into the material of the connecting web 520.
  • This improves the longevity of the connection of the connecting web 520 with the connecting strips 511 and 512 over the entire length of the sealing element 500 and thus leads to an improved avoidance of partial tearing at the edges, even when the sealing element 500 is used multiple times in shrink and / or Expansion processes on the mold core 300.
  • 12D shows an exemplary profile view of a sealing element 500 for use on a mold core 300 according to a further exemplary embodiment of the present invention.
  • the features from FIG. 12C are taken up by way of example, with the profile strip 530 being provided by way of example analogously to FIG. 12A.
  • the sealing elements for good formability are preferably designed such that their cross-sectional width is essentially at least four times, in particular at least five times, greater than the cross-sectional height of the connecting web, particularly preferably at least eight times greater than the cross-sectional height of the connecting web.
  • the cross-sectional width is essentially ten times greater than the cross-sectional height of the connecting web.
  • an expansion device 400 and a sealing element 500 were shown on the mold core 300.
  • a mold core with a core jacket with a plurality of longitudinal openings and a plurality of sealing elements sealing the respective longitudinal openings.
  • both opposite sides of the core jacket can be provided with a respective expansion device and / or a respective sealing element.
  • angular kernmantle cross-sections triangular, square, pentagonal, ..., polygonal; e.g. with rounded corners
  • several and / or all sides between two corners of the kernmantle cross-section can be provided with appropriate expansion devices and / or sealing elements.
  • Embodiments of the present invention have been described and proposed above, so that, in view of the disadvantages of the known state of the art, mold cores according to the invention for molding devices for the production of hollow and / or in particular tubular concrete bodies and accessories and spare parts (e.g. the sealing elements described) are proposed for such mold cores and / or can be provided in which an inexpensive arrangement that reliably seals the core shroud inward can also be provided, which also enables improved service life, is able to reduce material fatigue and / or wear and / or simpler handling in the event of material fatigue and / or wear permitted. It should again be pointed out that above only examples and / or exemplary embodiments of the present invention and their advantages have been described in detail with reference to the accompanying figures.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

L'invention concerne un noyau de moule (300) conçu pour être utilisé dans un ensemble moule (1000) pour produire des corps en béton creux et/ou en particulier tubulaires, ainsi qu'un ensemble moule (1000) comprenant un tel noyau de moule (300). Le noyau de moule (300) comprend une enveloppe de noyau (310) qui s'étend dans la direction longitudinale et comporte une ouverture longitudinale en forme de bande s'étendant d'une extrémité à l'autre de l'enveloppe de noyau (310), un dispositif d'expansion (400) servant à l'expansion et/ou au déploiement et/ou à la contraction et/ou au rétrécissement du noyau de moule (300), et un élément d'étanchéité (500) qui étanchéifie l'ouverture longitudinale de l'enveloppe de noyau (310) et présente une déformation souple et/ou élastique lors de la contraction du noyau de moule. Un ou plusieurs éléments de guidage (600A-600E) sont disposés sur la face de l'élément d'étanchéité (500) orientée vers l'intérieur du noyau de moule (300), et le dispositif d'expansion (400) est conçu de manière qu'au moins une partie entraînement (490) du dispositif d'expansion (400) entre en contact avec au moins une partie entraînement (603a) de l'élément ou des éléments de guidage (600A- 600E) de l'élément d'étanchéité (500), lors de la transition d'un premier à un deuxième processus de rétrécissement, pour guider l'élément d'étanchéité (500) lors du deuxième processus de rétrécissement.
PCT/EP2021/058924 2020-04-06 2021-04-06 Noyau de moule conçu pour un moule pour produire des corps en béton creux et ensemble moule comportant un tel noyau de moule WO2021204792A2 (fr)

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DE102020204416.3 2020-04-06
DE102020204416.3A DE102020204416A1 (de) 2020-04-06 2020-04-06 Formkern für eine Form zur Herstellung von hohlen Betonkörpern und einen derartigen Formkern aufweisende Formvorrichtung

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394570A (en) 1920-09-21 1921-10-25 John C Mitchell Inner form for concrete-pipe molds
DE102012220814A1 (de) 2012-11-14 2014-05-15 Johann Schlüsselbauer Schrumpfkern für eine Form zur Herstellung von hohlen Betonkörpern

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Publication number Priority date Publication date Assignee Title
JPH0235455Y2 (fr) * 1985-04-25 1990-09-26
JPH029936Y2 (fr) * 1985-08-06 1990-03-13
JPH01171614U (fr) * 1988-05-24 1989-12-05
JP2553334Y2 (ja) * 1992-12-25 1997-11-05 株式会社宇島製作所 コンクリート製品の型装置
JPH11254415A (ja) * 1998-03-09 1999-09-21 Takeshige Shimonohara 型枠及び型枠の離脱方法
JP2000084919A (ja) * 1998-09-10 2000-03-28 Moriyama Kogyo Kk コンクリート中空製品の製造に使用する内型枠及び内型枠の縮小方法及び内型枠を備えた成形型枠装置
JP3705597B1 (ja) 2005-03-02 2005-10-12 マルナカ工業株式会社 コンクリート内型枠
DE102010048053A1 (de) 2010-10-12 2012-04-12 Georg Prinzing Gmbh & Co. Kg Betonformen- Und Maschinenfabrik Gießform zur Herstellung von Betonhohlkörpern

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394570A (en) 1920-09-21 1921-10-25 John C Mitchell Inner form for concrete-pipe molds
DE102012220814A1 (de) 2012-11-14 2014-05-15 Johann Schlüsselbauer Schrumpfkern für eine Form zur Herstellung von hohlen Betonkörpern

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