EP0476245B2 - Procédé pour la fabrication d'éléments en béton - Google Patents

Procédé pour la fabrication d'éléments en béton Download PDF

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Publication number
EP0476245B2
EP0476245B2 EP91110661A EP91110661A EP0476245B2 EP 0476245 B2 EP0476245 B2 EP 0476245B2 EP 91110661 A EP91110661 A EP 91110661A EP 91110661 A EP91110661 A EP 91110661A EP 0476245 B2 EP0476245 B2 EP 0476245B2
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EP
European Patent Office
Prior art keywords
mould
concrete
ring
concrete part
top ring
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.)
Expired - Lifetime
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EP91110661A
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German (de)
English (en)
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EP0476245A3 (en
EP0476245A2 (fr
EP0476245B1 (fr
Inventor
Richard Kraiss
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.)
Georg Prinzing and Co KG Betonformen und Maschinenfabrik GmbH
Original Assignee
Georg Prinzing and Co KG Betonformen und Maschinenfabrik GmbH
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Publication of EP0476245A2 publication Critical patent/EP0476245A2/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
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0058—Moulds, cores or mandrels with provisions concerning the elimination of superfluous material; Moulds with burr-removing means provided therein or carried thereby
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/76—Moulds
    • B28B21/765—Top or bottom rings

Definitions

  • the invention relates to a method for producing concrete parts of the type mentioned in the preamble of claim 1.
  • the mold consists of several moving parts, namely a mold core, a mold jacket, a base ring and an upper ring that is moved down later.
  • the shape has a vibrator, e.g. B. at least one arranged in the interior of the mandrel, on.
  • the top ring which is still open at the top, is filled with concrete via a loading device, which is compacted with simultaneous vibration.
  • the mold is pulled off at the top by retracting the loading device and by a scraper ring moved therefrom.
  • the upper ring is then moved from above with further shaking and pressed into the molding space, thereby shaping the upper end of the concrete part, in particular a pointed end there. During this press-in process, further compression takes place, which enables the tip end to be shaped.
  • the length of the concrete part to be produced is thus achieved by further compacting the concrete.
  • this further compaction of the concrete cannot be set accurately and reproducibly, since the compaction curve is strongly influenced by mixture fluctuations. The result of this is that a predetermined length of the concrete part cannot be adhered to precisely and in a non-reproducible manner and, in the case of large mixture fluctuations, in particular in the area of the water content of the concrete, a problem-free automatic production sequence is not possible.
  • This device makes the extension necessary in addition to the upper ring and leads to additional sealing problems where the extension sits on the top of the mold core or the mold shell.
  • this proposal it is stated as a disadvantage that in any case concrete, which has previously been compacted, can be pressed out of the mold at the top and pressed inwards or outwards, where it can lead to contamination, malfunctions or the like.
  • the invention has for its object to provide a method of the type mentioned in the preamble of claim 1, by means of which molded concrete parts can be produced in exactly reproducible length and in an automated manufacturing process while maintaining small tolerances.
  • the object is achieved in a method of the type mentioned according to the invention by the features in the characterizing part of claim 1.
  • the invention is based on the knowledge that the production of concrete parts with a precisely specified length by pressing in the upper ring can not be achieved or can hardly be achieved with an accompanying compression of the concrete material located in the molding space, because different densifications result from mixture fluctuations.
  • the basic idea of the invention is therefore to more or less fully compact the concrete when filling the mold, it being possible to consciously work with longer shaking times, so that the concrete is always optimally compacted regardless of mixture fluctuations, and essentially when compaction is achieved or Completion of the compression process to manufacture the end of the concrete part to be shaped, in particular the pointed end, and the exact length of the concrete part.
  • the production of the exact length is achieved in that when the upper sleeve is pressed in by the pressing action, a corresponding amount of excess, compacted concrete material is displaced through the at least one opening from the molding space and the exact length of the concrete is thus compacted not by compression but at least essentially by displacement Concrete material is adjusted until the specified length is reached.
  • the term at least one opening, through which excess, at least predominantly compacted concrete can be displaced from the molding space means any form of an opening, in particular also one which, when the upper ring is moved down, between the inside of the ring and the mold core or between the outside of the ring Upper ring and the shaped jacket is present.
  • the method according to the invention is suitable not only with great advantage for the production of unreinforced concrete parts, but in particular also for the production of such concrete parts, the inserts, in particular reinforcements, for. B. reinforcement cages and / or inner linings, risers or the like.
  • the length of the concrete part can be reproduced exactly in relation to the length z.
  • B. a reinforcement cage or an inner lining It is known that concrete parts. e.g. B. pipes that are provided with reinforcement cages or with an inner lining, due to the rigidity of the reinforcement cage or the inner lining after demolding show no signs of settlement, because the deposits in their Length are rigid.
  • the method according to the invention for the production of exact concrete part lengths can also be used advantageously in the production of such concrete parts which do not have a symmetrical cross section, e.g. B. for the production of egg profiles, concrete pipes with a sole, rectangular profiles with different wall thicknesses or the like.
  • the method according to the invention can be used for practically any type of shape and machine, without conversions or additional elements being necessary.
  • the only prerequisite is working according to the vibratory press method, with only the manufacturing sequence being used for the method according to the invention and so the control of the individual manufacturing processes must be changed. It has been shown that even large concrete parts can be produced with ease using the method according to the invention in a reproducible manner and in an automatic production process. e.g. B.
  • the upper ring is pressed on from above. until the specified exact length of the concrete part is reached. Like the axial pushing up, this pressing in of the upper ring is carried out exactly via limit switches. Path measurement or the like. Controlled so that a very precise length of the concrete part can be reproducibly achieved. As soon as the latter has been reached, the molded casing, together with the base ring and the concrete part, is lowered back to the starting position by the aforementioned amount relative to the stationary mold core, and the pressing process of the upper end of the concrete part, in particular the pointed end, is completed. The upper ring can then be lifted upwards away from the mold and the concrete part can be removed from the mold in the manner provided by the respective machine.
  • the method according to the invention also enables the production of such concrete parts that are provided with reinforcement or inner lining, which leads up to the upper end of the concrete part, in which case reproducible, precise shaping of the tip end and the production of an exact predetermined concrete part length is also possible. although the upper ends of the reinforcement cages or the inner lining protrude into the end of the pointed shape.
  • the machine 10 is suitable for producing concrete parts 24 of various shapes, both round and non-round, for example egg-shaped, angular or the like.
  • the concrete parts 24 to be produced include, for example, pipes, manhole rings, shaft necks or special parts such as square or rectangular shaft elements, heating ducts, retaining wall elements, joint pieces, branches or the like.
  • the concrete parts to be produced are in particular: name: concrete pipes according to DIN 4032 and reinforced concrete pipes according to DIN 4035, manhole rings according to DIN 4034, as well as special parts, e.g. B.
  • Both concrete parts 24 can be produced without deposits and with deposits. 1 such reinforcements are shown in the form of reinforcement cages in the concrete part 24 shown on the left of the center line of the form and in the form of an inner lining 37 for the concrete part on the right of the center line, this inner lining 37 representing a corrosion protection lining that the concrete part 24 on the inside as possible lining the entire height and all around. Even if this is not shown, concrete parts 24 can also be produced which, in addition to the inner lining 37, are also provided with reinforcements 36, should this be desired. Concrete parts 24 can also be produced which have neither reinforcement 36 nor an inner lining 37. The concrete parts 24 to be produced can also have ascending elements, such as crampons or the like, which are not shown here.
  • the machine 10 operates fully automatically. Some parts of the machine 10 are arranged under the floor. They are located in a shaft 11. This applies to a carrier 12, which is only indicated schematically and to which a mold 13 is interchangeably attached.
  • the mold 13 has a mold core 14, which is stationary here, which is hollow on the inside and can be exchangeably fastened on at least one central vibrator (not shown further).
  • the mandrel 14 is e.g. round and provided on its top with a circular core cover 15, which is followed by a cylindrical core wall 16 leading downwards.
  • the interchangeable fastening of the mandrel 14 has the sense of being able to produce differently sized and / or shaped concrete parts 24 by exchanging it for another mandrel.
  • Part of the form 13 is also an outer, interchangeable mold jacket 17, which is also cylindrical.
  • the molded jacket 17 carries a striving flange 18 at the top, which forms a molding table there.
  • the mold jacket 17 surrounds the mold core 14 at a radial distance, forming a mold space 20 therebetween.
  • a support ring 19 is seated on the mold core 14.
  • the mold space 20 is closed off by a base ring 21, also called a sleeve, which serves to shape the lower front end of the molded part 24 and which is slipped over the mold core 14.
  • the base ring 21 can be moved here, for example after insertion on the machine side, by moving a corresponding lifting carriage downwards together with the mold jacket 17 via the mold core 14 into the lowered position in which the base ring 21 can rest on the support ring 19. This corresponds to the position shown in FIG. 2.
  • the mold jacket 17 is pressed with its lower end against the base ring 21 on which it rests, so that the molding space 20 is closed there.
  • the bottom ring 21 can later serve to facilitate the removal of the finished concrete part 21.
  • the machine 10 is provided above the shaft 11 and to the side of the mold 13 with a longitudinally displaceable loading and distribution device 30 of a known type, which is referred to below only as a loading device.
  • a loading device of a known type, which is referred to below only as a loading device.
  • the latter can be moved back and forth along a horizontal guide 31 in the direction of arrow 32, namely between the starting position shown in FIG. 1, left, and the working position indicated by dashed lines, right.
  • the charging device 30 In the initial position, the charging device 30 is located laterally next to the mold 13, without the latter and in particular the open end of the molding space 20 being covered by parts of the charging device 30.
  • the loading device 30 In the dotted working position moved to the right and forwards in the direction of arrow 32, the loading device 30 is located above the open upper end of the molding space 20, so that 30 can be filled into the latter by means of the loading device 30.
  • the loading device 30 has in the usual way a schematically indicated storage container 33 for the fresh concrete, further a conveyor belt 34 and below this a working in a frame 35 only indicated schematically, not further visible agitator.
  • the loading device 30 is moved in the direction of the arrow 32 over the mold 13, fresh concrete being conveyed from the storage container 33 via the conveyor belt 34 to the mold 13 and being filled into the mold by means of the agitator in the frame 35.
  • the machine 10 can also have a concrete smoothing device, not shown, which either forms a separate part of the machine or is integrated in the loading device 30.
  • the smoothing device can be moved along a horizontal plane above the form 13 filled with concrete when the loading device 30 is retracted in accordance with arrow 32 and causes the upper side to be smoothed out when retracting.
  • the smoothing device can e.g. be integrated in the frame 35.
  • the machine 10 also has a press-in device 40, which is only indicated schematically and, in the exemplary embodiment shown, has a holder 42 which can be lowered in the direction of the arrow 41 and can be moved in the opposite direction by means of a drive (not particularly shown), to which an upper ring 43, also called an upper sleeve, is attached.
  • the task of the press-in device 40 is to Filling the mold space 20 with fresh concrete and compacting when filling by running central vibrators to further compact the concrete if desired, and to give the upper end face of the concrete part 24 to be shaped the shape corresponding to the upper ring 43, in particular in the concrete part 24 thereby the upper tip end form.
  • the press-in device 40 is moved into its working position indicated by dashed lines, and in this the holder 42 is pressed down into the open end of the molding space 20 together with the upper ring 43 by means of a drive (not shown) in the direction of arrow 41.
  • the press-in device 40 has a carrier 44, which is here approximately sled-shaped, only indicated schematically, and a holding arm 45 striving from it, on the e.g. cantilevered end of the holder 42 is arranged with the upper ring 43.
  • the press-in device 40 can be moved in the horizontal direction according to arrow 46 by means of a drive (not particularly shown) between the starting position shown with solid lines on the left and the working position shown with dashed lines on the right.
  • a guide 47 is used for this purpose, along which the carrier 44 can be displaced in the direction of the arrow 46. Further details can be found in DE-A-37 04 881.
  • ejection cylinders 25 are arranged in the shaft 11 below the base ring 21, which are operated by pressure medium, in particular consist of hydraulic cylinders and are used for lifting and lowering.
  • the ejection cylinders 25 engage from below on the base ring 21, on which the shaped jacket 17 stands.
  • the bottom ring 21 is held and clamped on the shaped jacket 17 by means of a plurality of holders 26 which are driven by a drive 27, e.g. a hydraulic drive can be actuated.
  • the mold 13 is brought into the starting position shown in FIG. 2.
  • the mold jacket 17, seated on the base ring 21, is lowered over the mold core 14, the base ring 21 being seated on the ejection cylinders 25 located underneath.
  • a concrete part 24 is to be provided with inserts, for example with reinforcements 36 (FIGS. 1-5 left half of the mold) and / or with an inner lining 37 (FIGS. 1-5 right half of the mold), then the reinforcement 36 or the inner lining 37 also introduced, these also stand on the base ring 21 on the foot side.
  • the shaped jacket 17 is firmly connected to the bottom ring 21 in the region of its lower end via the sleeve-shaped holders 26 actuated by its drive 27, specifically in the area of the outer edge of the bottom ring 21 extending outside the shaped jacket 17.
  • the unit consisting of base ring 21, shaped jacket 17 and, if desired, reinforcements 36 and inner lining 37, is lowered into the pit 11 to such an extent that the top of the shaped jacket 17, namely its flange 18 forming the forming table, is flush with the core lid 15 of the mandrel 14 closes, as shown in FIG. 2.
  • the mold 13 in the upper region, where the core cover 15, the flange 18 of the mold jacket 17 and the concrete part 24 are flush with one another by retracting the loading device 30 by means of the explained smoothing device, for example a scraper ring, just pulled off.
  • the upper ring 43 is moved downward in the direction of arrow 41 by means of its drive (not shown further) and pressed into the open end of the molding space 20, thereby shaping the upper end face of the concrete part 24, for example forming a so-called pointed end there.
  • the state of the mold 13, which is shown in FIG. 2, is assumed below.
  • the bottom ring 21 with the molded jacket 17 and that in the molding space 20 as far as shaped concrete part 24 sit on the support ring 19 of the mandrel 14.
  • the upper side of the mold 13 is essentially flush, ie the concrete part 24 and the flange 18 run at least substantially within the plane of the core cover 15, which is oriented at right angles to the longitudinal central axis of the mold core 14.
  • the filling and compression process is at least essentially complete.
  • the form 13 has just been pulled off on the flush top.
  • At least one opening 28 is formed in the mold space 20, specifically by removing parts of the mold 13 delimiting the mold space 20.
  • the at least one opening 28 is formed at the upper end of the mold 13, and there between the upper end of the mold core 14 on the one hand and the upper ring 43 on the other hand (FIG. 4).
  • This at least one opening 28 is formed before and / or during the pressing in of the upper ring 43 in that, starting from the flush end of the mandrel 15, the mandrel 17 with flange 18 and the concrete part 24, an axial relative displacement between the mandrel 14 on the one hand and the Shaped jacket 17 together with the bottom ring 21 and the concrete part 24 on the other hand in a displacement position shown in FIGS. 1 and 3 and is carried out in such a way that the top of the mandrel 14, for example the core cover 15, is now a predetermined dimension x lower than the top 18 of the shaped jacket 17 and the top of the concrete part 20 runs.
  • the upper ring 43 can be exactly to the predetermined length l of the concrete part despite these inserts 24 are pressed in, although eg in the reinforcement 36, the inner reinforcement cage projects with its upper end into the tip end formed at this end of the concrete part 24 and extends almost to the end of the concrete part 24.
  • the inner lining 37 which extends with its upper end to the upper end of the concrete part 24.
  • concrete parts 24 are to be produced that are to be provided with inserts, for example reinforcements 36 and / or inner lining 37, it is possible to determine the length l of the concrete part 24 exactly in relation to the length of these inserts, in particular reinforcements 36 or Inner lining 37 to be determined. It goes without saying, however, that concrete parts 24 are also produced without any deposits. With such unreinforced concrete parts, it is possible to press the top ring 43 exactly to a length of the unreinforced concrete part that corresponds to the target length plus an added settlement dimension of the concrete part, if it can be assumed that such an unreinforced concrete part after the Manufacturing and demoulding continues. If such a settlement is not to be expected, the upper ring 43 can also be pressed into the predetermined final length of the concrete part 24 even when producing an unreinforced concrete part.
  • inserts for example reinforcements 36 and / or inner lining 37
  • the mold 13 is designed in such a way that the mold core 14 is arranged in a stationary manner and is thus also held stationary during this relative displacement.
  • the axial relative displacement takes place in that, with respect to the stationary mandrel 14, the shaping jacket 17 together with the base ring 21 held thereon and the concrete part 24 from the flush position according to FIG. 2 by the dimension x upwards into the displacement position according to FIG. 3 and 4 and later can be moved back to the starting position according to FIG. 5.
  • the peculiarity lies in the fact that a possibility is created only after the compaction process has been completed and in the case of at least substantially non-compactible concrete, that when the upper ring is pressed in 43 for forming the upper end of the concrete part 24 excess concrete, which must disappear from the mold space 20 when the upper ring 43 is pressed in, can be displaced through the opening 28 and thus the predetermined length l for the concrete part 24 can be exactly achieved when the upper ring 43 is pressed in can.
  • the ejection cylinders 25 can be used, which are activated and by attacking the underside of the base ring 21 this unit relative to Lift stationary mandrel 14 by dimension x .
  • the base ring 21 lifts off from the core-side support ring 19.
  • the ejection cylinders 25 can be activated in opposite directions, whereby, depending on the individual case, a relative displacement back into the starting position can also be achieved by pressing in the upper ring 43.
  • the molded jacket 17 together with the base ring 21 and the concrete part 24 is instead held stationary, the molded core 14 then being moved relative to it in the described manner into the displacement position and back into the starting position.
  • the mold core 14 is moved downward by the dimension x into the displacement position according to FIG. 3 with seated parts. If the exact length l of the concrete part 24 has been reached, the mandrel 14 is moved in the opposite direction by the dimension x upwards again into the flush starting position according to FIG. 5.
  • the mold core 14, on the one hand, and the mold jacket 17 together with the base ring 21 and the concrete part 24, on the other hand, are relative to one another in order to reach the displacement position and to move back into the starting position described described postponed.
  • an upper ring 43 is assumed, which according to its shape enables the manufacture of such a pointed end of the concrete part 24, the step of which is lower in the axial direction is on the outside.
  • the upper ring 43 has an inverted shape and can form such an end on the concrete part 24 in which the axially lower step is located on the inside.
  • the at least one opening 28 is formed in the molding space between the upper end of the molding jacket 17, 18 and the upper ring 43.
  • the at least one opening 28 in the mold space is formed in that, starting from the flush end of the mold core 14, the mold shell 17, 18 and the concrete part 24, there is an axial relative displacement between the mold core 14 on the one hand and the mold shell 17 together with the base ring 21 and the concrete part 24 on the other hand is made in the displacement position in such a way that the shaped jacket 17 then extends with its upper side, in particular the flange 18, by a predetermined dimension x deeper than the upper side 15 of the mold core 14 and the concrete part, so that when the Upper ring 43 between the latter, namely its outer ring region, and the mold jacket 17, 18 a corresponding ring opening is formed, through which concrete 29 of an appropriate amount can be displaced outwards and then onto the top, in particular the mold table 18, of the mold jacket 17.
  • the loading device 30 is adapted accordingly, so that the scraper ring lifts up on the form 13 at the front when driving forward and thus takes the excess concrete
  • the compaction is carried out by vibrating, namely the at least one central vibrator located in the mold core 14. It can be advantageous if the concrete is fully compacted when the mold 13 is filled, with longer vibration times, so that the concrete is always optimally compacted, regardless of mixture fluctuations. Only when the compaction process has been completed can the tip end be produced by pressing in the upper ring 43 and the production to the exact length dimension l of the concrete part 24. This length l can be set in a certain range independently of the length of the molded jacket 17 by determining the relative displacement by the dimension x and by determining the depth of immersion of the upper ring 43 in the mold space 20 will.
  • the method is particularly advantageous in the production of concrete parts 24 in the form of reinforced concrete pipes or pipes with an inner lining 37, as shown in FIGS. 1-5, because the length l of the tubular concrete part corresponds exactly to the length of the reinforcement cages 36 or the through the method Inner lining 37 can be set.
  • Another advantage of the method according to the invention which enables the production of exact lengths l of the concrete parts 24, is in the production of concrete parts 24 with non-symmetrical cross sections, for example in egg profiles, in concrete pipes with a base or the like. Due to the different walls, the known should normally be Manufacturing process when pressing the upper ring in the circumferential direction different amounts of concrete are displaced.
  • the concrete in which the concrete is displaced onto the upper side of the mold core 14, this is possible without any problems, because the concrete does not have to be displaced radially within the closed mold space 20, but rather because of the creation of the at least one annular opening 28 the concrete can dodge onto the top of the mandrel 14 and is only pressed out according to the displacement cross section.
  • the method according to the invention enables a trouble-free automatic production process in the production of concrete parts 24 of various types, shapes and sizes and also for large pipes, e.g. those with a length of 3 m and a nominal width of 2 m.
  • the upper ring 43 is pressed down by means of a drive until the exact length l of the concrete part 24 is reached.
  • the axial relative displacement by the dimension x and the pressing down of the upper ring 43 are controlled precisely via limit switches or displacement measurements or the like, so that the length l for the concrete part 24 can be reproducibly achieved exactly.
  • the axial relative displacement by the dimension x is carried out back to the starting position according to FIG. 5 in the manner described. Then the process of shaping the upper end of the concrete part 24, in particular the tip end there, is completed.
  • the upper ring 43 is moved back upward by its drive in the direction of arrow 41 and to the left in its starting position.
  • the demolding of the manufactured concrete part 24 can then take place, which can take place differently depending on the machine type and method.
  • the demoulding is carried out by activating the ejection cylinders 25, which eject the bottom ring 21 together with the shaped jacket 17 and the shaped concrete part 24 from below sufficiently far, for example 500 mm, upwards, for example 500 mm, whereupon the said parts by means of a crane or the like can be completely removed from the mandrel 14.
  • the concrete parts 24 produced are then removed together with the molded jacket 17. In the other case, the concrete parts 24 are immediately released and removed without a molded jacket.
  • the concrete is compacted by shaking. This vibration is also taken in the displacement position during the axial relative movement between the mandrel 14 on the one hand and the form jacket 17 with the base ring 21 and the concrete part 24 on the other hand, furthermore when the upper ring 43 is pressed in and the excess concrete 29 is displaced from the mold space 20 and also in the axial direction Relative displacement by dimension x back to the starting position.
  • the central vibrator is therefore switched on during these processes. Even if the exact dimension l is reached when the upper ring 43 is pressed down and the closed state of the mold according to FIG. 5 is reached by a relative displacement by the dimension x , it can still be shaken to give the upper end a good shape , In particular spigot, to reach the concrete part 24 through the upper ring 43.
  • one proceeds from the flush state of the mold 13 with filled and compacted concrete to form the at least an opening of the mold space 20 so that at least one element of the mold core 14 and / or the mold shell 17 and / or the base ring 21 and / or the top ring 43 is removed and this at least one opening thereafter when the required amount 29 of concrete is removed the mold space 29 has been displaced, is closed again by moving this part back in place.
  • Such elements which can be removed to form the at least one opening and can then be moved back into the starting position, are, for example, wall parts of the mold core 14 and / or the mold jacket 17, which can consist of flaps, slides or the like the concrete displaced through the openings created in this way is provided so that contamination of the mold 13 is avoided on the one hand and on the other hand this displaced concrete can be processed in the subsequent working cycle.
  • a removable element that can be moved back into the starting position can also be part of the base ring 21.
  • corresponding elements can be provided instead or simultaneously with the upper ring 43.
  • the invention provides the basic idea of only at least substantially after the compaction process with almost full compaction has been achieved, by shaping the concrete part end, in particular spigot end, by pressing in the upper ring 43, this then pressing in the spigot end because of no further possible compaction of the concrete Manufacture of the predetermined length l of the concrete part 24 can be achieved in a simple manner by providing at least one opening 28 in the mold space 20 before and / or during the pressing in of the upper ring, via which excess concrete 29 when the upper ring 43 is pressed out of the mold space 20 is ousted until at this press-in process the predetermined length l of the concrete part 24 is reached.
  • the method described is characterized in that it can be used in existing machines without the need for any additional or differently designed device parts, in particular in the area of the mold. Only the manufacturing process and thus the control of the individual manufacturing stages must be changed and adapted to it.
  • the method makes it possible, on the one hand, to achieve the best possible compaction despite fluctuations in the mix of the concrete and, on the other hand, to always achieve exact predetermined overall lengths l with regard to the concrete part to be produced, even if there are fluctuations in mix and compression in the concrete.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)

Claims (19)

  1. Procédé de fabrication d'éléments en béton (24), de tuyaux, anneaux de cuvelage, cols de colonnes, ou autres, notamment, dans un moule (13), avec un compartiment de moulage (20) délimité par un noyau (14), un anneau de fond (21) et un châssis (17), procédé selon lequel le compartiment de moulage (20) est rempli de béton (24), qui est serré, et un anneau supérieur (43), délimitant le compartiment de moulage, est emmanché dans l'extrémité ouverte de ce dernier, cet anneau conférant une forme adéquate, une extrémité en pointe notamment, à l'extrémité frontale de l'élément en béton (24), caractérisé en ce que avant et/ou pendant l'emmanchement de l'anneau supérieur (43) une overture (28), au moins, est formée dans le compartiment de moulage (20)en écartant des éléments (14, 16, 17, 21, 28) délimitant le compartiment de moulage (20) et en ce que lors de l'emmanchement de l'anneau supérieur (43) du béton excédentaire (29) est refoulé du compartiment de moulage (20) au travers de cette ouverture (28), au moins, et en ce que l'ouverture (28), au moins, est ensuite refermée.
  2. Procédé suivant la revendication 1, caractérisé en ce que l'ouverture (28), au moins, est formée dans le compartiment de moulage (20) sur l'extrémité supérieure du moule (13).
  3. Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que l'ouverture (28), au moins, est formée dans le compartiment de moulage (20) entre l'extrémité supérieure du noyau (14) et l'anneau supérieur (43).
  4. Procédé suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que l'ouverture (28), au moins, est formée dans le compartiment de moulage (20), avant et/ou pendant l'emmanchement de l'anneau supérieur (43), par le fait que, à partir d'un affleurement en partie haute du noyau (14), du châssis (17) et de l'élément en béton (24) dans le compartiment de moulage (20), un déplacement axial relatif est assuré entre le noyau (14), d'une part, le châssis (17) avec l'anneau de fond (21) et l'élément en béton (24), d'autre part, dans une position de refoulement et de sorte que le noyau (14) se situe d'une cote prédéfinie (x) par son côté supérieur, son couvercle (15), par exemple, à un niveau inférieur au côté supérieur (18) du châssis (17) et de l'élément en béton (24), et qu'une ouverture annulaire (28) est formée lors de l'emmanchement de l'anneau supérieur (43), entre ce dernier (43) et le noyau (14), du béton (29) pouvant être refoulé au travers de cette ouverture, vers l'intérieur et sur le côté supérieur (15) du noyau (14).
  5. Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que l'ouverture (28), au moins, est formée dans le compartiment de moulage (20) entre l'extrémité supérieure (18) du châssis (17) et l'anneau supérieur (43).
  6. Procédé suivant la revendication 5, caractérisé en ce que l'ouverture (28), au moins, est formée dans le compartiment de moulage (20), avant et/ou pendant l'emmanchement de l'anneau supérieur (43), par le fait que, à partir d'un affleurement en partie haute du noyau (14, 15), du châssis (17, 18) et de l'élément en béton (24) dans le compartiment de moulage (20), un déplacement axial relatif est assuré entre le noyau (14), d'une part, le châssis (17) avec l'anneau de fond (21) et l'élément en béton (24), d'autre part, dans une position de refoulement et de sorte que le châssis (17) se situe d'une cote prédéfinie (x) par son coté supérieur, la table de moulage (18) notamment, à un niveau inférieur au côté supérieur (15) du noyau (14) et de l'élément en béton (24), et qu'une ouverture annulaire externe est formée lors de l'emmanchement de l'anneau supérieur (43), entre ce dernier (43) et le châssis (17, 18), du béton pouvant être refoulé au travers de cette ouverture vers l'extérieur, et sur le côté supérieur (18) du châssis (17).
  7. Procédé suivant l'une quelconque des revendications 1 à 6, caractérisé en ce que, après l'obtention d'une longueur (l) de l'élément en béton (24), produite par l'emmanchement de l'anneau supérieur (43), un déplacement axial relatif, de sens contraire, est assuré entre le noyau (14), d'une part, le châssis (17) avec l'anneau de fond (21) et l'élément en béton (24), d'autre part, pour le retour dans une position initiale, dans laquelle le noyau (14), le châssis (17) et l'élément en béton (24) affleurent par leur côté supérieur respectif (15, 18).
  8. Procédé suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que le compartiment de moulage (20) est fermé par l'anneau supérieur (43) dans la position initiale.
  9. Procédé suivant l'une quelconque des revendications 1 à 8, caractérisé en ce que le noyau (14) est maintenu d'une manière stationnaire, le châssis (17), avec l'anneau de fond (21) et l'élément en béton (24), étant déplacés par rapport au noyau (14) dans la position de refoulement et ramenés dans la position initiale.
  10. Procédé suivant l'une quelconque des revendications 1 à 8, caractérisé en ce que le châssis (17), avec l'anneau de fond (21) et l'élément en béton (24), sont maintenus d'une manière stationnaire, le noyau (14) étant déplacé par rapport à ces éléments (17, 21) dans la position de refoulement et ramené dans la position initiale.
  11. Procédé suivant l'une quelconque des revendications 1 à 10, caractérisé en ce que le noyau (14), d'une part, le châssis (17) avec l'anneau de fond (21) et l'élément en béton (24), d'autre part, sont déplacés tous ensemble les uns par rapport aux autres.
  12. Procédé suivant la revendication 1, caractérisé en ce qu'un élément, au moins, du noyau (14) et/ou du châssis (17) et/ou de l'anneau de fond (21) et/ou de l'anneau supérieur (43) est écarté pour former l'ouverture, au moins, du béton excédentaire étant refoulé du compartiment de moulage (20) par cette ouverture, au moins, lors de l'emmanchement de l'anneau supérieur (43), puis cet élément, au moins, étant ramené en place pour fermer l'ouverture.
  13. Procédé suivant l'une quelconque des revendications 1 à 12, caractérisé en ce que l'emmanchement de l'anneau supérieur (43) et la formation de l'ouverture (28), au moins, dans le compartiment de moulage (20), débutent à peu près vers la fin de l'opération de remplissage et de serrage.
  14. Procédé suivant l'une quelconque des revendications 1 à 13, caractérisé en ce que l'emmanchement de l'anneau supérieur (43) et la formation de l'ouverture (28), au moins, débutent lorsque l'opération de remplissage et de serrage est terminée, à peu près du moins.
  15. Procédé suivant l'une quelconque des revendications 1 à 14, caractérisé en ce que des inserts, des armatures (36) notamment, telles que cages d'armature, des revêtements internes (37), des éléments ascendants, ou autres, sont introduits dans le compartiment de moulage (20).
  16. Procédé suivant l'une quelconque des revendications 1 à 15, caractérisé en ce que l'anneau supérieur (43) est emmanché sur la longueur prédéfinie (l) de l'élément en béton (24).
  17. Procédé suivant l'une quelconque des revendications 1 à 14, caractérisé en ce que l'anneau supérieur (43) est emmanché sur une longueur de l'élément en béton (24) non armé, correspondante à la longueur de consigne plus une cote de tassement de l'élément en béton.
  18. Procédé suivant l'une quelconque des revendications 1 à 17, caractérisé en ce que le serrage du béton est produit par secousses, et en ce que le secouage est assuré lors du déplacement axial relatif entre le noyau (14), d'une part, le châssis (17) avec l'anneau de fond (21) et l'élément en béton (24), d'autre part, dans la position de refoulement, lors de l'emmanchement de l'anneau supérieur (43) et du refoulement du béton excédentaire (29) du compartiment de moulage (20), et lors du déplacement axial relatif pour le retour dans le position initiale.
  19. Procédé suivant l'une quelconque des revendications 1 à 18, caractérisé en ce que le secouage est également assuré une fois la position initiale atteinte, et en position de fermeture du compartiment de moulage (20) au moyen de l'anneau supérieur (43).
EP91110661A 1990-09-17 1991-06-27 Procédé pour la fabrication d'éléments en béton Expired - Lifetime EP0476245B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4029480A DE4029480A1 (de) 1990-09-17 1990-09-17 Verfahren zum herstellen von betonteilen
DE4029480 1990-09-17

Publications (4)

Publication Number Publication Date
EP0476245A2 EP0476245A2 (fr) 1992-03-25
EP0476245A3 EP0476245A3 (en) 1992-09-09
EP0476245B1 EP0476245B1 (fr) 1994-10-26
EP0476245B2 true EP0476245B2 (fr) 1997-01-29

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EP91110661A Expired - Lifetime EP0476245B2 (fr) 1990-09-17 1991-06-27 Procédé pour la fabrication d'éléments en béton

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EP (1) EP0476245B2 (fr)
AT (1) ATE113235T1 (fr)
DE (2) DE4029480A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0670763A1 (fr) * 1993-09-30 1995-09-13 Colle S.P.A. Procede et dispositif permettant de produire des tuyaux en beton de longueur uniforme
AT517916A1 (de) * 2015-10-16 2017-05-15 Ulrich Schlüsselbauer Verfahren zum Herstellen von Betonrohren

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE469158C (de) * 1926-11-11 1928-12-04 Dampfziegelwerke Presse zur Herstellung von Formlingen aus Ton u. dgl. mit unter den Press- und Ausstossstempeln hin und her bewegtem Formtisch
DE1157988B (de) * 1960-04-07 1963-11-21 Werner Daecke Dipl Ing Aus Formmantel, -boden, -deckel und -kern bestehende, mit einem Vibrator verbundene Pressform zum Herstellen von Betonrohren
US3353214A (en) * 1964-10-30 1967-11-21 Herbert C Schulze Apparatus for compacting particulate material
US3334390A (en) * 1965-01-04 1967-08-08 Steiro Harry End ring trowelling attachment for concrete pipe making apparatus
FR2314810A1 (fr) * 1975-06-16 1977-01-14 Eau Assainissement Nouveau procede de coulage vertical des tuyaux en beton de grandes dimensions
DE3323340A1 (de) * 1983-06-29 1985-01-03 Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren Formeinrichtung zum herstellen von betonformteilen

Also Published As

Publication number Publication date
ATE113235T1 (de) 1994-11-15
EP0476245A3 (en) 1992-09-09
EP0476245A2 (fr) 1992-03-25
EP0476245B1 (fr) 1994-10-26
DE4029480A1 (de) 1992-03-19
DE59103341D1 (de) 1994-12-01

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