EP3718718B1 - Dispositif de guidage dans une machine de moulage et machine de moulage dotée d'un tel dispositif de guidage - Google Patents

Dispositif de guidage dans une machine de moulage et machine de moulage dotée d'un tel dispositif de guidage Download PDF

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Publication number
EP3718718B1
EP3718718B1 EP20167773.9A EP20167773A EP3718718B1 EP 3718718 B1 EP3718718 B1 EP 3718718B1 EP 20167773 A EP20167773 A EP 20167773A EP 3718718 B1 EP3718718 B1 EP 3718718B1
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EP
European Patent Office
Prior art keywords
guide element
mold part
guide
lower mold
guide device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20167773.9A
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German (de)
English (en)
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EP3718718A1 (fr
Inventor
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
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Kobra Formen GmbH
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Publication date
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Publication of EP3718718A1 publication Critical patent/EP3718718A1/fr
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Publication of EP3718718B1 publication Critical patent/EP3718718B1/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
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/028—Centering the press head, e.g. using guiding pins or chamfered mould edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides

Definitions

  • the invention relates to a guide device for a molding machine and a molding machine with such a guide device.
  • the production of concrete moldings such. B. paving stones is typically done as part of a mechanical production using a molding machine with a stamp unit and designed as a mold lower part, in which the stamp unit can engage.
  • One or more mold cavities which are open at the top and bottom, are usually formed in the lower mold part.
  • the lower part of the mold is placed on a horizontal base with a lower boundary level of a stone field, which closes the lower openings of the mold.
  • the mold cavities are filled with concrete mixture through the upper openings, which is then pressed over pressure plates arranged on the stamping unit, in which the pressure plates are lowered into the mold cavities through the upper openings. Then, by shaking the base, the concrete mix solidifies to form dimensionally stable molded concrete parts. These are removed from the mold through the lower openings of the mold cavities.
  • the punch unit is connected to a typically hydraulically actuated vertical movement unit of the molding machine and can be moved vertically by means of this unit.
  • the connection can be given in the usual construction via a ballast unit, which usually forms an upper mold part with the punch unit as a unit that can be handled as a unit.
  • a block mold for the production of concrete blocks which comprises an upper mold part with at least one stamp with a pressure piece and a lower mold part with at least one mold cavity for use in a block molding machine, the lower mold part being movable up and down in a block molding machine.
  • the lower mold part can be placed on a mold base of the block-making machine and the upper mold part can be coupled to a machine mount of the block-molding machine that can be moved up and down.
  • a filling box of the block-making machine can be moved over the lower mold part, and the upper mold part and/or the lower mold part has play in relation to a machine frame of the block-making machine.
  • a centering device is provided for aligning the lower mold part and the upper mold part in an xy plane. This results in an exact centering of the two mold parts relative to one another, with a conical section on the centering device slowly releasing the centering of the mold parts after the pressure piece has entered the mold cavity.
  • a device for the production of concrete moldings in a molding machine which has a mold upper part with at least one plunger for transmitting a force to at least one pressure plate comprises, wherein the pressure plate can be introduced in the vertical direction into an opening of a mold cavity in a lower mold part, wherein the lower mold part is surrounded by a frame which has a guide means connected to the upper mold part, which is designed in such a way that the lower mold part faces the upper mold part from the vertical direction during the engagement of the pressure plates in the openings of the mold cavity can be tilted.
  • the DE 10 2005 054 993 A1 discloses a guide device according to the preamble of claim 1.
  • This publication describes in particular a device for the production of concrete blocks by compacting a concrete mixture, in which vertical vibrating movements act on a mould, the mold being arranged on a vibrating base and having a relative to the Form movable loading device can be compacted, according to the invention one or more of the relative to each other vertically movable assemblies are centered horizontally by magnetic forces.
  • a magnet arrangement is described with two sub-arrays, which are centered without contact.
  • the second sub-assemblies are stationary with respect to a part of the device and serve as vertical guides of the molding machine, so that the movable loading device is centered relative to a machine frame.
  • the object of the invention is to provide a guide device in a molding machine and molding machine with such a guide device in which the centering between the upper mold part and the lower mold part is further improved by the guide device exhibiting little wear.
  • a guide device in a molding machine namely a guide device for a molding machine.
  • the guide device comprises an upper mold part for transmitting a compressive force to at least one pressure plate, and the guide device comprises a lower mold part, wherein the pressure plate can be inserted into an opening of the lower mold part in the direction of insertion, a magnetizable first guide element being assigned to the upper mold part and a magnetizable second guide element to the lower mold part , which overlap outside the opening in at least two positions along the direction of insertion without contact in a guide area, so that the lower mold part maintains a predefined distance from the upper mold part running transversely to the direction of insertion by means of a magnetic force between the guide elements when the pressure plate is inserted into the lower mold part, with the the second guide element is arranged on at least two diagonally opposite corner areas of the opening outside the mold cavity on the frame and the first guide element on one of the pressure plates associated pressure stamp plate is attached.
  • a guide device is created in which the upper mold part and the lower mold part of the molding machine are aligned with one another by means of a magnetic guide. Due to the non-contact guidance by means of the guide device according to the invention, it is thus possible to avoid or reduce wear on the guide device. In addition to the improved service life compared to mechanical guides, another advantage is that vibration energy losses are reduced.
  • the lower mold part is further compressed by means of a load unit via a vibrating table after the concrete mixture has been poured in and pressure has been applied.
  • mechanical guidance between the upper mold part and the lower mold part extracts energy from this process, which is relevant when designing the operating parameters of the vibrating table must be taken into account.
  • the magnetic guide according to the invention provides a remedy here.
  • the first guide element or the second guide element has a plurality of permanent magnets or electromagnets on an upper side facing the other guide element in the guide region.
  • the provision of the magnetic force by means of permanent magnets represents a simple and cost-effective way of creating a magnetic guide device, it can be advantageous in other applications to make the magnetic bearing force appropriately adjustable by means of electromagnets. Both the specification of a predetermined value and the active adjustability for damping the relative movement between the upper mold part and the lower mold part are possible.
  • the design of the magnets in the guide area can take place in different ways, it being provided to arrange corresponding permanent magnets or electromagnets both on the first guide element and on the second guide element.
  • a magnetic bearing can also be obtained by arranging magnets only on the first guide member or on the second guide member conceivable, since corresponding eddy currents would be generated, for example, on the other guide element.
  • the guide area is provided with magnets in such a way that the magnetic force along the insertion direction of the pressure plates is maintained over a longer distance, so that the lower mold part can be centered with respect to the upper mold part in the molding machine.
  • the efficiency of the shaking process can also be increased, since no more energy is withdrawn from it.
  • the first guide element and the second guide element are arranged in quadrangular areas of the opening.
  • the guide device creates a translational degree of freedom along the direction of insertion, with a corresponding centering taking place in the plane of the pressure plates.
  • the centering can take place both via two guide areas, preferably attached to opposite corners of the lower mold part, or also in all quadrangular areas.
  • the corner areas can each surround an opening.
  • the mold base has guide means for each pressure plate and associated opening combination. A large number of openings, each of which is provided with its own pressure plate, usually complement one another to form a mold cavity Lower mold part, with corresponding guide elements being able to be arranged in the corner regions of the lower mold part at two or four positions. While the former variant provides magnetic guidance for each pressure plate, the second variant provides magnetic guidance for an entire molding machine.
  • the second guide element is arranged on the outside of the frame and a fastening device for fastening the lower mold part in a machine frame.
  • the guide device can advantageously be fastened to the lower mold part in such a way that it is guided only between the upper mold part and the lower mold part, without having to take into account the other components of the molding machine, such as the loading device or the machine frame.
  • the guide device is thus matched to the combination of upper mold part and lower mold part, so that no modifications have to be made to the other components of the molding machine when changing one or both parts. This is also beneficial when changing the stone height.
  • the guide device can be designed in such a way that the lower mold part can be tilted against the upper mold part along the direction of insertion.
  • the guide device would thus create a degree of rotational freedom in which the tilting angle is typically limited to 1 to 2°, as has already been advantageously implemented from the prior art in mechanical guides.
  • the first guide element and the second guide element with corresponding Surfaces are formed, which are designed, for example, as angled wall surfaces along the direction of insertion.
  • an L-shaped or V-shaped configuration of the guide elements was selected here, with the second guide element being able to be arranged on a frame surrounding the opening and the first guide element being arranged transversely to the insertion direction at a distance from the second guide element.
  • first guide element or the second guide element can enclose the respective other guide element, in which case the first guide element can preferably be designed in the form of a pin and the second guide element can be designed in the form of a socket.
  • the insertion element encloses the other completely, so that both a magnetic guide and a magnetic bearing can be formed, which allow the upper mold part to be centered in relation to the lower mold part.
  • the magnetic force may be adjustable or controllable. The magnetic force is maintained while the pressure plates are being threaded into the opening, while the concrete mixture is being compacted or during a demoulding process for the concrete block.
  • the magnetic force can be reduced or completely absent during a shaking process, in order not to withdraw any energy from the shaking process due to the guidance of the lower mold part in the upper mold part.
  • the magnetic force can also be present when the lower mold part is installed in the molding machine, so that the upper mold part can be centered relative to the lower mold part during installation.
  • the guide device can support the installation of the lower mold part in the molding machine with an inlet chamfer arranged on the first guide element or the second guide element.
  • figure 1 a part of a molding machine FM is shown as it is used for the production of concrete moldings by compressing a concrete mixture.
  • the part shown here includes those parts which bring about the shaping of the concrete moldings when the concrete mixture is compressed.
  • the remaining components such as a machine frame carrying the parts shown, a vibrating table on which components of the invention rest, a filling device for filling with the concrete mixture and a device for compressing the concrete mixture, usually hydraulically actuated, are known to the person skilled in the art.
  • the FM molding machine is in 1 shown in a perspective side view. It can be seen that an upper form part FO is connected to a multiplicity of pressure plates DP, it being possible for the upper form part FO to be moved in the direction of an insertion direction ER by means of a loading unit (not shown). Corresponding stamps ST are provided between the pressure plates DP and the upper mold part FO and hold the pressure plates DP on the upper mold part FO. All pressure plates DP are connected via their stamps ST by means of a pressure stamp plate DS, so that the pressure plates DP can move up and down together via the ballasting unit (not shown). During the downward movement, the pressure plates DP engage in corresponding openings OE in a lower mold part FU. The openings OE are surrounded by a frame RA. The frame RA has two opposite Pages fastening devices BV, by means of which the lower mold part FU is attached to the above-mentioned machine frame.
  • a concrete mixture is poured into the openings OE, so that after the pressure plates DP have penetrated along the insertion direction ER, the concrete mixture can be compressed.
  • the lower mold part FU is usually placed on the vibrating table mentioned above.
  • the lower mold part FU is typically divided into a number of openings OE, which are separated from one another by correspondingly shaped side walls SW. A plurality of such openings is typically referred to as a mold cavity.
  • no inlet chamfer is provided on the upper edge KA of the side walls SW of the lower mold part FU.
  • the first guide element FE1 is assigned to the mold upper part.
  • the second guide element FE2 is assigned to the lower mold part FU and can be arranged on a section of the lower mold part FU that corresponds to a frame formed outside the mold cavity.
  • Figure 2a shows the underside of the lower mold part opposite to the direction of insertion ER.
  • Figure 2b corresponds to a detailed view of a corner area Figure 2a .
  • the lower mold part FU has a plurality of openings OE, which are separated from the side wall SW as a mold cavity FN.
  • first guide element FE1 and the second guide element FE2 are arranged on the lower mold part FU in all four corner areas EB.
  • the second guide element FE2 is designed with wall surfaces on the lower mold part which can have an angle of 90° to one another.
  • the first guide element FE1 which corresponds to the mold upper part.
  • the magnets MA can be embodied either as permanent magnets or as electromagnets.
  • the second guide element FE2 is arranged with one wall surface on an outside of the frame RA and with the other wall surface on an outside of the fastening device BV.
  • the first guide element FE1 is attached to the pressure stamp plate DS.
  • the pressure stamp plate DS is shaped in such a way that it spans the outside of the frame RA and the fastening device BV, and the position of the first guide element FE1 on the pressure stamp plate DS is selected in such a way that the first guide element FE1 and the second guide element FE2 are at the predefined distance of the Spalt's SP come to rest.
  • the guide device FE is shown again individually without the corresponding components of the molding machine FM. It can be seen that the first guide element FE1 has a first extension along the insertion direction ER AD1, which is selected to be greater than a second extension AD2 of the second guide element FE2. The first guide element FE1 and the second guide element FE2 thus overlap along a guide area, which ensures the corresponding centering along a larger section along the insertion direction ER.
  • the first guide element FE1 is designed with an inlet chamfer EF and the second guide element FE2 with a corresponding further inlet chamfer EF', which are intended to facilitate the assembly of the lower mold part FU and the upper mold part FO.
  • FIG 4 another embodiment of the invention is shown.
  • the guide elements FE1 and FE2 are not formed here with corresponding surfaces, but are arranged in such a way that the first guide element FE1 engages in the second guide element FE2.
  • the second guide element FE2 therefore completely surrounds the first guide element FE1.
  • the guide device FE is again shown without the components of the molding machine. It can be seen that the first guide element is designed in the form of a pin, which in turn is provided with a large number of magnets MA on its upper side in the guide area.
  • the second guide element FE2 is designed in the form of a bushing or a hollow cylinder the inside of which a large number of magnets MA are also arranged.
  • the first guide element FE1 is in turn designed with a run-in chamfer EF.
  • the magnets MA can be used in accordance with both the execution Figure 4 to 6 as well as in the execution according to Figure 1 to 3 be formed both by permanent magnets and by electromagnets. While in the first case a simple yet reliable guidance between the upper mold part FO and the lower mold part FU is possible, in the second case the magnetic force can also be controlled or adjusted.
  • the controller can influence the magnetic force at different operating times of the molding machine FM accordingly, for example during the threading of pressure plates DP into the opening OE, during compaction of the concrete mixture in the opening OE when the pressure plates DP penetrate or during a demolding process of the concrete block .
  • the magnetic force can be reduced or completely absent during a shaking process, in order not to withdraw any energy from the shaking process due to the guidance of the lower mold part FU in the upper mold part FO.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Confectionery (AREA)

Claims (15)

  1. Dispositif de guidage destiné à une machine de moulage (FM), dans lequel le dispositif de guidage comprend une partie supérieure de moule (FO) permettant de transmettre une force de compression à au moins une plaque de compression (DP) et le dispositif de guidage comprend une partie inférieure de moule (FU), la plaque de compression (DP) pouvant être insérée dans au moins une ouverture (OE) de la partie inférieure de moule (FU) dans la direction d'insertion (ER), l'au moins une ouverture (OE) de la partie inférieure de moule (FU) formant une cavité de moule (FN) et étant entourée d'un cadre (RA), un premier élément de guidage magnétisable (FE1) étant associé à la partie supérieure de moule (FO) et un second élément de guidage magnétisable (FE2) étant associé à la partie inférieure de moule (FU), caractérisé en ce que les premier et second éléments de guidage magnétisables se chevauchent, sans contact dans une zone de guidage, à l'extérieur de l'ouverture (OE) sur au moins deux positions le long de la direction d'insertion (ER), de sorte que la partie inférieure de moule (FU), au moyen d'une force magnétique entre le premier élément de guidage (FE1) et le second élément de guidage (FE2), respecte une distance prédéfinie (SP) s'étendant transversalement à la direction d'insertion (ER) par rapport à la partie supérieure de moule (FO) lors de l'insertion de la plaque de compression (DP) dans la partie inférieure de moule (FU), le second élément de guidage (FE2) étant disposé sur au moins deux zones d'angle (EB) opposées diagonalement de l'ouverture (OE) à l'extérieur de la cavité de moule (FN) sur le cadre (RA) et le premier élément de guidage (FE1) étant fixé à une plaque de timbre de compression (DS) associée à la plaque de compression (DP).
  2. Dispositif de guidage selon la revendication 1, dans lequel, pour générer la force magnétique, le premier élément de guidage (FE1) ou le second élément de guidage (FE2) présente une pluralité d'aimants permanents ou d'électroaimants sur une face supérieure tournée vers l'autre élément de guidage dans la zone de guidage.
  3. Dispositif de guidage selon la revendication 1 ou 2, dans lequel le premier élément de guidage (FE1) et le second élément de guidage (FE2) sont disposés dans quatre zones d'angle (EB) de l'ouverture (OE).
  4. Dispositif de guidage selon l'une des revendications 1 à 3, dans lequel le second élément de guidage (FE2) est disposé sur des faces extérieures du cadre (RA) et d'un appareil de fixation (BV) permettant de fixer la partie inférieure de moule (FU) dans un bâti de machine.
  5. Dispositif de guidage selon l'une des revendications 1 à 4, dans lequel une pluralité d'ouvertures (OE) viennent former conjointement une cavité de moule (FN), laquelle est entourée par le premier élément de guidage (FE1) et le second élément de guidage (FE2) dans les zones d'angle (EB).
  6. Dispositif de guidage selon l'une des revendications 1 à 5, dans lequel la partie inférieure de moule (FU) peut basculer contre la partie supérieure de moule (FO) selon la direction d'insertion (ER).
  7. Dispositif de guidage selon l'une des revendications 1 à 6, dans lequel le premier élément de guidage (FE1) et le second élément de guidage (FE2) sont conçus avec des surfaces correspondantes.
  8. Dispositif de guidage selon la revendication 7, dans lequel le premier élément de guidage (FE1) et le second élément de guidage (FE2) sont conçus respectivement avec deux surfaces de paroi qui sont disposées de façon angulaire l'une par rapport à l'autre le long de la direction d'insertion (EB).
  9. Dispositif de guidage selon la revendication 7 ou 8, dans lequel le second élément de guidage (FE2) est disposé sur un cadre entourant l'ouverture (OE) et le premier élément de guidage (FE1) est disposé transversalement à la direction d'insertion (ER), de façon espacée du second élément de guidage (FE2).
  10. Dispositif de guidage selon la revendication 7, dans lequel le premier élément de guidage (FE1) ou le second élément de guidage (FE2) entoure l'autre élément de guidage.
  11. Dispositif de guidage selon la revendication 10, dans lequel le premier élément de guidage (FE1) est conçu comme une broche et le second élément de guidage (FE2) est conçu comme une douille.
  12. Machine de moulage (FM) permettant la production de blocs moulés en béton et comportant un dispositif de guidage (FE) selon l'une des revendications 1 à 11.
  13. Machine de moulage selon la revendication 12, dans laquelle la force magnétique est réglable ou commandable.
  14. Machine de moulage selon la revendication 12 ou 13, dans laquelle la force magnétique est maintenue pendant un enfilage de plaques de compression (DP) dans l'ouverture (OE), pendant un compactage du mélange de béton ou pendant un processus de démoulage du bloc moulé en béton.
  15. Machine de moulage selon l'une des revendications 12 à 14, dans laquelle la force magnétique est maintenue lorsque la partie supérieure de moule (FO) et la partie inférieure de moule (FU) sont centrées pendant l'installation.
EP20167773.9A 2019-04-02 2020-04-02 Dispositif de guidage dans une machine de moulage et machine de moulage dotée d'un tel dispositif de guidage Active EP3718718B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019108574.8A DE102019108574A1 (de) 2019-04-02 2019-04-02 Führungseinrichtung in einer Formmaschine und Formmaschine mit einer solchen Führungseinrichtung

Publications (2)

Publication Number Publication Date
EP3718718A1 EP3718718A1 (fr) 2020-10-07
EP3718718B1 true EP3718718B1 (fr) 2022-06-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20167773.9A Active EP3718718B1 (fr) 2019-04-02 2020-04-02 Dispositif de guidage dans une machine de moulage et machine de moulage dotée d'un tel dispositif de guidage

Country Status (5)

Country Link
EP (1) EP3718718B1 (fr)
DE (1) DE102019108574A1 (fr)
DK (1) DK3718718T3 (fr)
ES (1) ES2921311T3 (fr)
PL (1) PL3718718T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3638207A1 (de) * 1986-11-08 1988-05-11 Netter Gmbh Verfahren zur herstellung von betonfomsteinen und vorrichtung zur durchfuehrung des verfahrens
DE102005048930B4 (de) * 2004-11-12 2021-04-01 Rampf Formen Gmbh Form zur Herstellung von Betonsteinen und Steinformmaschine mit Form
DE102005054993A1 (de) * 2005-11-18 2007-05-31 Kobra Formen Gmbh Vorrichtung zur Herstellung von Betonformsteinen
DE102015103829A1 (de) * 2015-03-16 2016-09-22 Kobra Formen Gmbh Vorrichtung zur Herstellung von Betonformteilen in einer Formmaschine

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PL3718718T3 (pl) 2022-07-18
DK3718718T3 (da) 2022-07-04
DE102019108574A1 (de) 2020-10-08
EP3718718A1 (fr) 2020-10-07
ES2921311T3 (es) 2022-08-23

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