EP1967341A2 - Forme destinée à la fabrication de pierres en béton et procédé de fabrication d'un agencement de noyau d'un tel moule - Google Patents

Forme destinée à la fabrication de pierres en béton et procédé de fabrication d'un agencement de noyau d'un tel moule Download PDF

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Publication number
EP1967341A2
EP1967341A2 EP08102199A EP08102199A EP1967341A2 EP 1967341 A2 EP1967341 A2 EP 1967341A2 EP 08102199 A EP08102199 A EP 08102199A EP 08102199 A EP08102199 A EP 08102199A EP 1967341 A2 EP1967341 A2 EP 1967341A2
Authority
EP
European Patent Office
Prior art keywords
core
mold
core holder
holding element
counter
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.)
Withdrawn
Application number
EP08102199A
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German (de)
English (en)
Other versions
EP1967341A3 (fr
Inventor
Rudolf Braungardt
Holger Stichel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobra Formen GmbH
Original Assignee
Kobra Formen GmbH
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
Publication date
Application filed by Kobra Formen GmbH filed Critical Kobra Formen GmbH
Priority to EP08102199A priority Critical patent/EP1967341A3/fr
Publication of EP1967341A2 publication Critical patent/EP1967341A2/fr
Publication of EP1967341A3 publication Critical patent/EP1967341A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
    • B28B7/162—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes for building blocks or similar block-shaped articles
    • 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
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
    • 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
    • B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
    • B28B7/346—Manufacture of moulds

Definitions

  • the invention relates to a mold for the production of concrete blocks and a method for producing a mold core of such a form.
  • mold core arrangements are common, which comprise at least one strip-shaped core holder spanning the at least one mold cavity and at least one mold core held on it. Determined by the mode of operation of the mold, in the operating position the core holder extends horizontally and the lower boundary plane of the mold forms a horizontal plane.
  • the mold is placed on a bottom opening closing pad and the space between the mold cavity walls and the mold core (s) is filled through the upper apertures with wet concrete amount.
  • Pressure plates which are fitted in the free upper openings between Formnestratin, mandrels and core holder are inserted from above into the upper Formnestö réelleen and press on the concrete amount.
  • the pad is excited during a shaking process to vertical vibrations, which are transferred to the concrete amount, so that this compacts within a few seconds to a still moist, but dimensionally stable concrete moldings, which by relative vertical displacement between the mold and pad from the mold and on the pad is deposited and removed from the molding machine.
  • the mold core arrangement remains firmly connected to the mold over successive such manufacturing cycles. In particular, during the Hinttelvorgangs the mold core assembly is exposed to strong dynamic loads.
  • the mandrels are typically designed as composed of welded sheets hollow body.
  • the core holder is passed through recesses in opposite side walls of the hollow body and attached to opposite walls of the mold cavity, in particular used in recesses of the walls.
  • the upper edge of the core holder is generally flush with a hollow body upwards final lid surface, so that a flat continuous upper surface of the mold is given, via which a filling machine for machine filling of the mold cavity with concrete amount can be moved horizontally.
  • the core holder is typically welded along its upper edge to two parallel edges of the split lid extending laterally of the core holder.
  • the core holders are preferably releasably connected to the walls of the mold cavity with the mold.
  • the core holders can also be fastened to partitions between the mold cavities.
  • Such forms are for example in the DE 197 01 590 C2 or the WO 03/026860 A1 described.
  • a core element has an integrally connected to the core holder and projecting downwardly from this metallic hanging element, which forms as a support for a the outer edges of the core element defining plastic casting.
  • the hanging element can be designed as a hollow inner core which continues directly downwards, and which is formed by multiple bending from one complex planar sheet metal blank can be produced in one piece with the core holder.
  • the mold is placed on a bottom opening closing pad and the space between the mold cavity walls and the mold core (s) is filled through the upper apertures with wet concrete amount.
  • Pressure plates which are fitted in the free upper openings between FormnestschreibN, mandrels and core holder are inserted from above into the upper Formnestö réelleen and press on the concrete amount.
  • the pad is excited during a shaking process to vertical vibrations, which are transferred to the concrete amount, so that this compacts within a few seconds to a still moist, but dimensionally stable concrete moldings, which by relative vertical displacement between the mold and pad from the mold and on the pad is deposited and removed from the molding machine.
  • the mandrel assembly remains firmly connected to the mold through successive such manufacturing cycles. In particular, during the Rüttelvorgangs the mold core assembly is exposed to strong dynamic loads.
  • a core element for such a form in which a hollow sheet body is connected as a mold core in such a way with the core holder, that between the core plate and core holder horizontally disposed support plates are inserted, which in the longitudinal direction of the core holder continuously extending welds with the core holder and with the Nuclear sheet are welded in relation to the occurrence of distortion stresses neutral zones.
  • a filler may be filled with vibration damping properties, but which transmits no vertical forces between core holder strip and mold core.
  • a core element in another embodiment, can be an outer core Have plastic and an inner core, wherein the inner core formed by einstükkig with the core holder or welded or riveted to this downwardly tapered hanging support with which the plastic is poured in a mold.
  • the hangers extend into the foot of the mold core and can have openings or struts or form hollow body.
  • a mold core assembly in which in the core holder bar longitudinally spaced two holes are mounted and designed as a hollow cast body core from the top has a gap for receiving the core holder strip and laterally across the longitudinal direction continuous with the openings of the core holder strip aligned larger recesses.
  • the core holder strip is inserted into the gap of the mold core and clamping sleeves are pressed through the recesses in the holes of the core holder. Between the clamping sleeves and the radially larger recesses rings of elastic material are pressed.
  • the height of the core holder is limited by the flush with the lid or the upper edge of the mold core course of its upper edge and the flush with the upper level of the compacted concrete mold body as possible course of its lower edge.
  • the predominantly vertical shaking forces that occur during the shaking process also have a strong effect on the mold core, which is supported against these shaking forces on the core holder.
  • the high shaking forces often lead to damage in the devices, especially fractures of the core holder.
  • the object of the present invention is to provide a mold for the production of concrete blocks, which has an advantageous connection of the mandrel with a core holder arrangement, and a method for producing a mold core arrangement for such a form.
  • the force-transmitting coupling of a mold core to a core holder strip on holding structures and counter-holding structures and this enclosing and force-transmitting plastic casting is on the one hand advantageous to produce and on the other particularly advantageous dynamic behavior during the Studttelvorgangs in the solidification of a filled into the mold cavity concrete amount.
  • support structures are generally understood structures that are connected to the core holder assembly and keep the mandrel at this, as the counterstay structures are understood, which coupled the essential Garttel mechanism transmitted to the support structures, but not connected directly to the force-transmitting core holder assembly.
  • connection between the support structure and the core holder strip can be done with high precision and in particular with particularly low weakening of the core holder strip and leads to a high stability against the dynamic load in the shaking operation.
  • the support structure is connected via fitting screws as fastening elements with the core holder strip. Openings in the core holder strip, through which the fastening elements are guided transversely to the longitudinal direction of the core holder strip, are advantageously arranged in the region of the neutral fiber of the core holder strip with respect to vertical deflection.
  • in the longitudinal direction of the core holder strip spaced from each other at least two, in particular exactly two openings provided with fasteners, in particular fitting screws provided.
  • the fitting screws advantageously form fits with the openings in the core holder strip, in particular clearance fits, so that a slight twisting occurs the core holder strip against the dowel screws in the dynamic vertical deflection of the core holder strip is unhindered possible.
  • a very small variation in the spacing of the longitudinally spaced openings occurring simultaneously in the dynamic bending of the core holder strip is advantageously compensated for by the plastic casting.
  • the fitting screws advantageously also provide fits with the retaining structures, in particular clearance fits.
  • the holding structures advantageously contain on both sides of the core holder strip arranged holding elements, wherein advantageously in one of the holding elements a thread is formed.
  • the opposite holding elements by means of the fitting screws against each other and against the intermediate core holder strip can be clamped.
  • the support structures may also be non-rotatably connected to the core holder strip with this, wherein a relative rotation of such kind with the core holder bar connected holding structures in the dynamic deflection of the core holder strip then by a rotation of the support structures relative to the plastic body or preferably by reversible deformation of the Plastic material of the plastic casting takes place.
  • a non-rotatable connection of the support structures with the core holder strip for example, by pressing of retaining elements in openings of the core holder strip or by welding of holding elements to the core holder strip, preferably in the region of said neutral fiber to the side surfaces of the core holder strip done.
  • Retaining elements can also be made in one piece with the core holder strip as extensions of this.
  • the holding structures advantageously have a non-rotationally symmetrical outer contour and are anchored with this non-rotatably in the cast body.
  • the counter-holding structures can advantageously be connected to a metal jacket of the mandrel, in particular screwed or preferably welded, which determines at least a part of the outer surface of the mandrel.
  • the predominant or complete outer surface of the mandrel, in particular also the concrete surface in the mold cavity facing outer surface is formed by a metal jacket, which also with a z. B. wear-reducing and / or a replacement of the concrete amount facilitating coating can be provided.
  • a holding element of the holding structures advantageously extends at least in an initial section substantially horizontally and transversely to the longitudinal direction of the core holder strip leading away from it.
  • the pad closes the lower opening of the mold cavity, can be filled through the upper opening of the core holder strip and held on this mold core concrete amount in the mold cavity and pressure plates of a punch assembly can be sunk into the mold cavity.
  • At least one counter-holding element of the counter-holding structures is advantageously at least partially arranged at a smaller distance from the lower boundary plane than the at least one holding element.
  • the at least one counter-holding element extends in vertical projection at least partially under the at least one holding element and in particular in oblong design across to this.
  • the counter-holding element is approximately rod-shaped in an advantageous embodiment and can also be bent.
  • At least one elongated counter-holding element can advantageously be connected at two opposite ends with a metal jacket of the mold core, in particular welded.
  • the support structure and the support structure are advantageously on both sides of the core holder strip and are preferably permanently connected to the mold core.
  • the plastic casting body which connects the holding structure and the counter-holding structure in a force-transmitting manner may advantageously be limited to an upper part of the inner volume of the mold core surrounded by a metal jacket, in particular to less than 40% of the inner volume.
  • the mandrel may also be formed by a solid or partially hollow plastic body.
  • the plastic cast body is advantageously produced in such a way that the support structure and the support structure are aligned in defined mutual, preferably spaced-apart spatial positions and flowed around by a flowable phase of plastic material and the plastic material is cured to a plastic cast body, which holding structures and counter-holding structures multi-sided encloses.
  • a sheet metal jacket of the mold core serve in an advantageous embodiment, on which advantageously the counter-holding structure is attached.
  • the support structure is advantageously attached to the core holder strip or via releasable fastening elements on a recess body replacing the core holder strip for the casting process, and likewise arranged in the casting mold.
  • the figures partially show coordinate axes x, y, z of a rectangular coordinate system, the x direction coinciding with the longitudinal direction of core holder strips, the z direction indicating the vertical direction, and the y direction being perpendicular to the x direction.
  • X-direction and y-direction extend in the operating position of the core holder assembly or a mold containing them horizontally.
  • Fig. 1A to Fig. 1G show a first advantageous embodiment of a core holder assembly with a core holder strip KH1 and a core composed of two core halves K11, K12 core, wherein in Fig. 1A an oblique view of the core halves with Kernhalterance and two fitting screws PS1 is shown as fasteners.
  • the core holder strip KH1 Of the core holder strip KH1 only one lying in the x-direction in the region of the core K1 section is shown.
  • the core holder strip KH1 is assumed to be substantially rectangular in cross-section in a yz plane and is chamfered down in a manner known per se, which may also be given at its upper edge.
  • two bores HB1 are produced, which are spaced apart in the x-direction and both lie within the longitudinal extent of the core in the x-direction.
  • the core holder KH1 has compared to a deflection in an xz plane in the z direction a bending moment of inertia determined by the cross section, which can be calculated according to generally known formulas.
  • neutral fiber NF which, in the case of rectangular cross-section and material-homogeneous construction of the core holder strip, typically lies in the z direction in the center of the extension of the core holder KH1 in the z direction and forms a neutral fiber surface parallel to the xy plane.
  • the bores HB1 are positioned in the z-direction so that they grasp the described neutral fiber and are preferably symmetrical to it and coincide the centers of the holes in the z-direction with this neutral fiber.
  • a recess OA1 is formed in an upper portion OT1, in which the core holder KH1 can be used without play substantially in the y-direction ,
  • holding elements H11, H12 extending in the y-direction are provided, which can be aligned with the two bores HB1 in the core holder with the core holder KH1 inserted into the recess KH1.
  • fitting screws PS1 can be passed through the holding elements H11, H12 in the core and the holes HB1 in the core holder KH1 and are tightened, for which in the y-direction behind the core holder KH1 lying portion of the core counter thread GG1 are provided for the thread GE1 of the fitting screws PS1.
  • the holes HB1 in the core holder KH1 and the holding elements H11, H12 in the core advantageously form with the fitting screws clearance adjustments.
  • the diameter of the bores HB1 in the core holder is considered to be the longitudinal extension of the connections between the core holder and the fastening elements.
  • the distance between adjacent holes in the core holder within a core is considered as the distance between two connections.
  • the core K1 advantageously has a constant outer contour in an upper section OT1, i. H. a constant cross-section in y-x-cut planes and here provides a uniform guide for during the shaking in the z-direction downwardly displacing printing plates, which closely surround the core holder and the core.
  • the side surfaces of the core K1 preferably taper slightly conically down the core, which is advantageous for the demoulding of the compacted after the vibrating compact concrete body relative to the core K1 down.
  • the core in a known per se shape at its lower end on the one hand a strong oblique indentation down.
  • the core itself may be constructed in various advantageous ways, as will be illustrated by the following further examples.
  • the core at least on its outer surface, consists predominantly of plastic and is cast in a casting mold.
  • the mold core consists advantageously of two divided by a vertical parting plane core halves, which in Fig. 1A are represented as K11, K12 before joining.
  • the core halves K11 and K12 are preferably designed as hollow bodies with cavities H1, H2 open towards the parting plane between the two halves.
  • the mold core halves K11, K12 each have an upper part OT1 with a metallic shell OM forming the outer surface and a lower part UT1 made of plastic, and are preferably produced by casting a solidifying plastic in its liquid phase in a casting mold, wherein the production of the lower parts UT1 simultaneously with a connection of the lower parts UT1 with the metallic shells OM of the upper part is done by the shell OM of a shell integrated or inserted into the mold for the lower parts and at the same time with the plastic for the lower part UT1 the shells OM poured to the tops OT1 become.
  • Upper part OT1 and lower part UT1 of a mold core half therefore each form a unit.
  • connection arrangements are provided which establish a firm anchoring of the plastic with the metallic shells OM of the upper part on counter-retaining structures with anchoring brackets AW1, BW1 as counter-holding elements and in the form of retaining elements H11, H12, for example, dowel sleeves and / or threaded sleeves with fasteners
  • fitting screws PS1 cooperate and can serve to connect the two core halves with each other and with the core holder via holes in the core holder.
  • Centering and fastening structures Z11, Z12 can advantageously be provided on the surfaces of the two lower parts facing one another on the parting plane, which can be designed, for example, as projections and depressions engaging in one another during the assembly of the core halves.
  • a connection of the lower parts can advantageously in a simple and reliable way by Screwing, welding or in particular by gluing done.
  • Fig. 1B shows a core half K11 looking in the cavities H1 from the side of the parting plane ago.
  • the cavities H1 are open to the parting plane and closed away from the parting plane by a wall forming the outer wall of the finished mandrel.
  • the division into a plurality of cavities H1 results in a low weight of the entire core at the same time a high stability by the stiffening effect of the intermediate walls ZW1 between the individual cavities.
  • Fig. 1C is a metallic half shell OM of a top OT1 in a view obliquely from above and in Fig. 1D outlined in an oblique view from below.
  • the metallic shells OM can advantageously be assembled from a plurality of sheet metal blanks or in a preferred embodiment from a single sheet metal blank and preferably welded at one or more edges by welds KS1.
  • Fig. 1C and Fig. 1D is a metallic shell made of a single flat sheet metal blank by folding, with a cover surface OD1 and side surfaces OS1 are integrally connected via a bend FO1 and are brought from the flat sheet metal blank by folding in the sketched form.
  • welds KS1 can advantageously be provided for stabilizing the form.
  • contours of recesses OA1 are formed for a core holder strip.
  • the shell OM of the upper part encloses one Space from four sides, which is open to the parting plane or the position of the core holder down and down.
  • connecting elements of the connection arrangement in the form of anchoring angles AW1, BW1 are installed as counter holding elements, which are preferably welded to the metallic shell OM and can be used for this purpose in openings WOD of the cover surface OD1 or WOS of the side surfaces OS1, for example.
  • openings AU11 and AU12 are provided in the side walls of the shell OM, which serve as access of fastening elements or introduction of connecting elements.
  • Such connecting elements may in particular be dowel sleeves with or without thread.
  • a fitting sleeve H11 and axially aligned to this in the other half of the core a fitting sleeve H12 are used with thread as holding elements of support structures, advantageously in pairs in opposite directions.
  • a shell OM of an upper part is inserted into the mold for the mandrel, wherein the anchoring angle AW1, BW1 are already connected as counter holding elements with the upper part OM and dowel sleeves H11, H12 are placed as holding elements in a defined orientation in the mold.
  • a recess body can also be inserted as a governor for the core holder in the mold and hold the holding elements in the defined position.
  • the dowel sleeves H11, H12 preferably extend as far as the recess body.
  • At the recesses OA1 can advantageously be provided in the mold, a gap between the recess body and the edges of the recesses OA1, which is likewise filled with plastic during casting of the mold core half. As a result, direct contact between the core holder and the metallic shells OM of the upper parts OT1 is avoided in the finished mandrel.
  • the dowels H11, H12 are arranged in the mold or in the cavity of the upper parts OM so that they do not touch the anchoring angle AW1, BW1.
  • the upper part and in particular of the dowel sleeves H11, H12 and the anchoring angle AW1, BW1 containing space within the metallic shell OM of the upper part OT1 is completely filled with plastic. After solidification of the plastic, this results in a firm connection between the dowel sleeves H11, H12 and the shell OM or the plastic body of the base UT1 on the anchoring angle AW1, BW1, the dowel sleeves H11, H12 and the plastic, without the dowel sleeves and the anchoring angle have direct contact with each other.
  • Fig. 1E shows a section through a mold core half in an xz plane by an anchoring angle AW1.
  • the figure clearly shows that the dowel sleeves and anchoring angles are not directly connected with each other, but that the encapsulation of the dowel sleeves H11, H12 and the anchoring angle AW1 and the in Fig. 1E invisible anchoring angle BW1 on the plastic of the plastic body KK1 results in a solid positive connection of all parts of the mold core halves.
  • the fitting sleeve H11 contains perpendicular to the plane of a fitting portion and a contact shoulder for a fitting screw, the fitting sleeve H12 includes a fitting portion and a mating thread GG1 to a thread GE1 a dowel screw PS1.
  • Fig. 1F shows a section through an assembled mold core with a core holder KH1, to which both mold core halves via K11, K12 attached via a dowel screw PS1 and braced against each other and against the core holder KH1.
  • the dowel sleeves H11 and H12 extend in the axial direction of the dowel screw PS1 to the core holder KH1, so that over the Dowel screw axial clamping is possible.
  • By the fit of the dowel screw in the two dowel sleeves and in the bore of the core holder also results in respect to the longitudinal axis of the dowel screw PS1 radial blocking in all directions.
  • the dowel sleeves H11, H12 are not directly, but also connected only via the plastic grout with the metallic shells OM of the tops OT1. In a dynamic deformation of the core holder KH1 therefore occurring length changes in the x-direction between the spaced holes in the core holder can be easily absorbed by the elastic deformability of the plastic.
  • Fig. 1G shows an oblique view of a composite core holder assembly in the previous Fig. 1A to 1E described manner, wherein a core holder KH1 is drawn only indicated to release a view into the recess KA1 for the core holder with the end faces of the dowel sleeves H11, H12 and the mating shanks of the dowel screws PS1.
  • FIGS. 2A to 2E another advantageous embodiment is shown, in which the core K2 assembled from two core halves K21, K22 has in a conventional manner a complete metallic outer surface, which is formed by sheet metal surfaces.
  • the sheet-hollow body is assembled from a plurality of sheet metal parts, which are preferably at least partially welded together.
  • the peculiarity of this design is that fasteners are not directly connected to the core holder with the hollow sheet metal core.
  • the sheet-hollow body is composed of two half-shells, which may be performed identical to each other depending on the shape of the sheet metal core.
  • Fig. 2A is an example of such a sheet half shell K21 sketched with a view in the cavity surrounded by the half-shell.
  • the half-shell K21 has recesses OA2 for a core holder in a manner which is conventional per se in the x-direction opposite side walls of an upper section.
  • the cavity within the half-shell K21 is advantageously divided by an intermediate bottom BZ, which advantageously extends below the lower edge of the recesses OA2, into an upper hollow space HO2 and a lower hollow space HU2.
  • connecting elements V2 are firmly connected as counter holding elements with the sheet of the half shell K21, preferably welded, this connection also as sketched on the intermediate bottom BZ, which in turn can be welded to the sheet metal shell, can take place.
  • the connecting elements V2 are executed in the example outlined as metallic bolts or the like, which extend over holes WO2 of the metal jacket of the half-shell K21 and through holes WOZ of the intermediate floor and are welded there.
  • the arrangement of the bolts as connecting elements V2 is in the enlarged section to Fig. 2D even closer.
  • the sheet-hollow body may also be composed of more parts than just the two half-shells.
  • Such dowel sleeves which in turn interact with dowel screws PS2 and can be embodied as first dowel sleeves H21 with a fitting section and a contact shoulder for a dowel screw on the one hand or as a second fitting sleeve H22 with a fitting section and a mating thread to the thread of the dowel screw PS2, are in a cutaway view of FIG joined hollow body after Fig. 2B shown.
  • a core holder or in its place a recess body can be arranged in a device for completing the mold core assembly within the recesses OA2.
  • the dowel sleeves H21, H22 as holding elements are connected via dowel screws or in their place receiving screws with such inserted core holder or recess body and held in the cavity in a defined position, but without having direct contact with the sheet metal body formed by the two half shells.
  • both the connecting elements V2 as counter holding elements and the dowel sleeves H21, H22 are completely enclosed as holding elements of the plastic and form in this way without direct metallic connection a firm anchoring of the dowel sleeves relative to the sheet metal body. Because of the intermediate floor BZ only a small part of the entire cavity of the sheet metal body needs to be poured out with plastic.
  • Fig. 2D shows the molded with a plastic body KK2 upper cavity in a sectional view with a yz-sectional plane through two counter-holding elements V2.
  • Fig. 2E shows a section through one opposite Fig. 2D in the longitudinal direction x offset cutting plane by fitting screws PS2 as fasteners and passport sleeves as potted holding elements.
  • the dowel holes and the holes in the core holder KH2 on the one hand in the axial direction of the longitudinal axis of the dowel PS2 a backlash-free clamping and on the other by the fits between dowel PS2 on the one hand and dowels H21, H22 and holes in Core holder on the other hand, a radial blocking in all directions.
  • the plastic body KK2 is stressed for all loads primarily to pressure, so that there is a permanently stable connection between the core holder with the fasteners and the mandrel on the plastic casting KK2.
  • Fig. 3 shows one of the Fig. 2 insofar comparable arrangement, as well as a composite of two halves K31, K32 sheet metal core is assumed, are attached to which as counter-holding structures anchoring elements V31, V32, which are connected to power to the core holder strip screwed holding structures H31, H32 via a plastic potting.
  • the arrangement shows in particular a different type and arrangement of anchoring elements of the counter-holding structures.
  • Fig. 3A is a core half with attached thereto counter-support structures shown in an oblique view.
  • the counter-retaining structures consist of rods provided with elevations on their surface, as are customary in particular in concrete construction.
  • a first anchoring element V31 of the counter-holding structures extends parallel to the longitudinal direction x of the core holder strip between the x-direction opposite wall surfaces of the core half K31 and is attached to these wall surfaces, in particular z. B. welded by hole welding through holes SB3 in the wall surfaces with them.
  • a second anchoring element V32 is fastened to the side wall of the core which is parallel to the longitudinal direction x and protrudes therefrom in the direction of the core holder strip.
  • a recess AU31 in the same side wall serves as a mounting hole, via which a screw head of a clamping screw is accessible.
  • Fig. 3B shows a core holder strip or used as a replacement in their place in the production screw holder strip (recess body) SH3 with bolted holding structures and dowel screws or mounting screws AS3.
  • the holding structures comprise first holding elements H31 and second holding elements H32, which in their arrangement and function essentially the holding elements H11 and H12 or H21 and H22 of the arrangements according to Fig. 1 and Fig. 2 correspond.
  • the second holding elements H32 are in this embodiment not provided with a tool approach and in the longitudinal direction parallel to the side wall of the sheet metal core half no mounting recess for the second holding elements is provided.
  • the holding elements are screwed together with the screw holder strip SH3 before assembly of the two core halves K31, K32 and the two core halves are included, including the in Fig. 3B assembly assembled and aligned, wherein the screw holder strip SH3 eino in the recesses OA3 of the core halves and the screw heads of the mounting screws AS3 are at the recesses AU31 or can protrude through it.
  • Fig. 3C shows the positions of the first and second holding members H31, H32 relative to that in FIG Fig. 3A shown core half K31 and attached to this anchoring elements V31, V32 of the counter-holding structures, for the sake of clarity, the screw holder strip SH3 is omitted.
  • the core halves are joined together and joined together, in particular welded and the space in the upper region of the core interior is poured with accurate alignment of the screw holder strip relative to the connected core halves with a plastic material, in particular polyurethane, which forms a plastic body during curing, which both the holding elements H31 , H32 and the anchoring elements V31, V32 on several sides encloses and connects force-transmitting.
  • the combination of the module is after Fig.
  • Liquid plastic material is, for. B. through an opening in the bottom of the mold core, which can be closed later, filled in such an amount that this liquid plastic material encloses holding structures and counter-holding structures.
  • the mandrel can be solved by the screw holder strip SH3 by removing both mounting screws AS3 and the screw holder strip is removed from the recesses OA3.
  • the mold core thus provided with retaining structures, counter-retaining structures and these connecting plastic body can then be connected to a core holder strip by these inserted into the recesses OA3 and screws, in particular fitting screws PS3 by embedded in the plastic body first holding elements H31, and aligned with these aligned holes inserted in the core holder strip through to second holding elements and screwed with their threaded ends GP3 in the mating threads GH3 of the second holding elements H32.
  • Fig. 3D shows a view of the relative positions of the holding elements and anchoring elements in the mold core, wherein the plastic body KK3 is assumed to represent the first anchoring elements as transparent.
  • the first anchoring elements V31 are in the direction behind, in the operating position of the mold core so under the holding elements and crossed to these, resulting in a particularly advantageous support vertical vibrational forces.
  • the second anchoring elements lie in the longitudinal direction x between two holding elements and extend parallel to the axial direction y of the fitting screws and the holding elements.
  • the screw heads of the PS3 screws are accessible through the recesses AU31.
  • the one by the Bolt head formed a dowel collar is supported in the axial direction on the core holder strip KH3 facing away from the end face of the first holding member H31.
  • the supporting surfaces can also be conically shaped.
  • Fig. 3E shows as a detail enlargement Fig. 3D the fit P32 and the threaded connection GP3, GH3 of the set screw PS3 with the second holding element and the fit PSK of the fitting screw with the bore BK in the core holder strip KH3.
  • Fig. 3F shows an enlarged detail with the dowel screw PS3 in the first support member H31 and formed only in an axial portion of the core holder strip of the first support member H31 fits P31 between the dowel PS3 and the first support member H31 and the support of the formed by the screw head federal of the dowel screw PS3 on the core holder strip KH3 facing away from the end face of the first holding element.
  • the holding elements H31, H32 and the counter-holding elements V31, V32 advantageously form shrinking centers during hardening of the plastic material surrounding them for a plastic material exhibiting a volume reduction (shrinkage) during curing, resulting in an advantageous, particularly close integration of the holding elements and the anchoring elements or comparable elements the other embodiments leads.
  • Fig. 4A shows a mold core half K41 of an embodiment for narrow cores, ie cores in the y-direction of small extent. They are analogous to Fig. 3 Holding elements H41 and H42 provided, which are screwed via screws S4 with the core holder strip KH4.
  • the core holder strip KH4 which are prepared on the mold core halves (shown only mold core half K41) recesses OA4, indicated only by a broken line.
  • the width of the mandrel in the y-direction is in the example shown only about twice as large as the thickness of the core holder strip in the y-direction.
  • Retaining elements V41, V42 are attached to the side walls of the mandrel, preferably by hole welding, and protrude from the inner walls projecting in the direction of the other core half.
  • the counter-holding elements V41 are for example welded to the illustrated first core half K41, the counter-holding elements V42 are welded to the second core half K42, not shown. It can also be attached to a core half all counter-holding elements. In yet another embodiment, the counter-holding elements can be welded to both core halves and cause their connection with each other.
  • the counter-holding elements are arranged lower in the vertical z-direction than the holding elements and in the advantageous example are each two counter-holding elements V41, V42 assigned in pairs each an axial combination of two holding elements H41, H42 spatially and force-transmitting and offset in the x-direction against the holding elements positioned below these.
  • the relative position of holding elements and Retaining elements in the x direction is shown in the sectional view Fig. 4B in an xy-plane through the holding elements (omitting the core holder strip) and the relative position in the z-direction from the sectional view to Fig. 4C visible in a yz plane.
  • the counter holding elements run under the core holder strip KH4
  • the holding elements project into the recesses AU41, AU42 in the axial direction y and the screws S4 are designed as countersunk screws and the first holding elements H41 have conical depressions.
  • a for the force-transmitting connection, the holding elements and the counter holding elements enclosing plastic casting KK4 extends advantageously in the column RS4 between Kernhalterance and / or recesses OA4 and / or in particular in the spaces between retaining elements H41, H42 and recesses AU41, AU42, wherein advantageously the transmission Studttel phenomenonn on the plastic body in the shaking operation takes place substantially between the counter-holding elements and the holding elements and not or not significantly on the recesses OA4, AU41, AU42.
  • Retaining elements and counter holding elements advantageously form shrinking cores in the case of the volume shrinkage typical for polymerizing solidifying plastics, to which the plastic material which solidifies shrinks and against which the solidified plastic material rests under elastic tension.
  • Fig. 5A shows a core holder strip KH5, which has a plurality of bores preferably in the region of the vertical deflection of the neutral core of the core holder strip.
  • rod-shaped holding elements H5 are used and attached to the core holder bar, for example, welded or in particular pressed.
  • An in Fig. 5B shown mold core half K51 contains at least one counter-holding element V5.
  • the other half of the mold core is typically mirror-symmetrical with respect to the shown half of the mold core K51 and also contains at least one counter-holding element.
  • the core holder strip KH5 with holding elements H5 is inserted into the recess OA5 of the core half K51 and the other core half is added and connected to the first core half, in particular welded.
  • the holding elements H5 are located inside the mold core. Recesses in the side walls of the mandrel are not provided.
  • the core holder strip is held in a defined position relative to the mold core, while flowable plastic material is introduced at least into a subspace comprising the holding elements H5 and the counter holding elements V5, in particular in the inverted position of the mold core with the core holder strip at the bottom.
  • After solidification of the plastic material to a plastic cast body of the mandrel is permanently connected to the core holder strip, in turn, a transfer of shaking forces between the mandrel and the core holder strip via the attached to the core holder holder elements, the plastic casting and attached to the mold core counter holding elements ,
  • Figure 6 shows one too Fig. 5 alternative type of fastening of openings KO of the core holder strip KH6 projecting holding elements H6, which are provided with screw threads and in particular threaded rods can be performed.
  • the holding elements are firmly bolted to the core holder strip. Loosening of the nuts in the shaking operation is prevented by the casting of the nuts in the plastic casting.
  • the openings in the core holder strip can be recessed conically and arranged on the holding elements conical plunger SH with conical abutment surfaces OH between the nuts MH6 and the core holder strip be inserted.
  • the conical plungers SH clamped into the conical depressions KO of the openings advantageously bring about a particularly reliable and stable support of the holding elements H6 and thus of a mold core on the core holder strip KH6.
  • the dowel screws having, embedded in plastic material holding elements at their core holder bar facing away from the free end of a tool approach, z. Example, have a polygonal structure, which are accessible via in the extension of these holding elements recessed openings in the plastic material and optionally in a metallic core sheath from the outside to prevent tightening or loosening the fastening screws twisting of the holding elements relative to the plastic material when using high moments.

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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)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP08102199A 2007-03-03 2008-02-29 Forme destinée à la fabrication de pierres en béton et procédé de fabrication d'un agencement de noyau d'un tel moule Withdrawn EP1967341A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08102199A EP1967341A3 (fr) 2007-03-03 2008-02-29 Forme destinée à la fabrication de pierres en béton et procédé de fabrication d'un agencement de noyau d'un tel moule

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007010351 2007-03-03
EP07103687 2007-03-07
DE102007018721 2007-04-20
EP08102199A EP1967341A3 (fr) 2007-03-03 2008-02-29 Forme destinée à la fabrication de pierres en béton et procédé de fabrication d'un agencement de noyau d'un tel moule

Publications (2)

Publication Number Publication Date
EP1967341A2 true EP1967341A2 (fr) 2008-09-10
EP1967341A3 EP1967341A3 (fr) 2011-04-27

Family

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EP08102199A Withdrawn EP1967341A3 (fr) 2007-03-03 2008-02-29 Forme destinée à la fabrication de pierres en béton et procédé de fabrication d'un agencement de noyau d'un tel moule
EP08102198A Ceased EP1967340A3 (fr) 2007-03-03 2008-02-29 Forme destinée à la fabrication de corps en béton

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08102198A Ceased EP1967340A3 (fr) 2007-03-03 2008-02-29 Forme destinée à la fabrication de corps en béton

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DE (4) DE102008000458A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4272920A1 (fr) * 2022-05-03 2023-11-08 Besser Company Noyau de moule

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000458A1 (de) * 2007-03-03 2008-10-16 Kobra Formen Gmbh Form zur Herstellung von Betonformsteinen und Verfahren zur Herstellung einer Formkernanordnung einer solchen Form
DE102010037142A1 (de) 2010-08-24 2012-03-01 Kobra Formen Gmbh Form zur Herstellung von Betonformsteinen
CN114714473B (zh) * 2022-04-11 2023-09-19 三峡大学 用于制备低水膏比条板的生产装置及方法

Citations (5)

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Publication number Priority date Publication date Assignee Title
FR2365418A1 (fr) 1976-09-24 1978-04-21 Garin Guy Outillage en elements interchangeables pour moulage de blocs de beton
DE19701590C2 (de) 1997-01-18 2001-10-18 Kobra Formen & Anlagenbau Gmbh Form zur Herstellung von Hohlblock-Betonformsteinen
WO2003026860A1 (fr) 2001-09-20 2003-04-03 Kobra Formen Gmbh Moule pour la realisation de corps moules
DE10326126A1 (de) 2002-12-23 2004-07-15 Rampf Formen Gmbh Vorrichtung zur Herstellung von Formsteinen
DE102004005045A1 (de) 2003-02-19 2004-09-02 Rampf Formen Gmbh Kernelement

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Publication number Priority date Publication date Assignee Title
BE387678A (fr) *
US1642980A (en) * 1927-01-29 1927-09-20 Arch P Turner Form for making hollow bricks, tiles, and the like
FR2210928A5 (fr) * 1972-12-18 1974-07-12 Minato Andre
US4274824A (en) * 1978-10-02 1981-06-23 Mullins Wayne L Mold box apparatus
EP0182619A3 (fr) 1984-11-22 1988-07-20 Bip Chemicals Limited Fabrication de blocs de construction
WO2007101869A2 (fr) * 2006-03-08 2007-09-13 Kobra Formen Gmbh Dispositif de production de corps moulés en béton
DE102008000458A1 (de) * 2007-03-03 2008-10-16 Kobra Formen Gmbh Form zur Herstellung von Betonformsteinen und Verfahren zur Herstellung einer Formkernanordnung einer solchen Form

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2365418A1 (fr) 1976-09-24 1978-04-21 Garin Guy Outillage en elements interchangeables pour moulage de blocs de beton
DE19701590C2 (de) 1997-01-18 2001-10-18 Kobra Formen & Anlagenbau Gmbh Form zur Herstellung von Hohlblock-Betonformsteinen
WO2003026860A1 (fr) 2001-09-20 2003-04-03 Kobra Formen Gmbh Moule pour la realisation de corps moules
DE10326126A1 (de) 2002-12-23 2004-07-15 Rampf Formen Gmbh Vorrichtung zur Herstellung von Formsteinen
DE102004005045A1 (de) 2003-02-19 2004-09-02 Rampf Formen Gmbh Kernelement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4272920A1 (fr) * 2022-05-03 2023-11-08 Besser Company Noyau de moule

Also Published As

Publication number Publication date
DE102008000458A8 (de) 2009-01-22
DE102008000459A1 (de) 2008-09-11
EP1967340A3 (fr) 2011-04-27
EP1967341A3 (fr) 2011-04-27
DE102008000458A1 (de) 2008-10-16
DE102008000462A1 (de) 2008-09-04
DE102008000454B4 (de) 2024-06-06
DE102008000454A1 (de) 2008-09-04
EP1967340A2 (fr) 2008-09-10

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