EP3718718A1 - Guiding device in a moulding machine and moulding machine with such a guiding device - Google Patents
Guiding device in a moulding machine and moulding machine with such a guiding device Download PDFInfo
- Publication number
- EP3718718A1 EP3718718A1 EP20167773.9A EP20167773A EP3718718A1 EP 3718718 A1 EP3718718 A1 EP 3718718A1 EP 20167773 A EP20167773 A EP 20167773A EP 3718718 A1 EP3718718 A1 EP 3718718A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide element
- guide
- mold part
- lower mold
- molding machine
- 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.)
- Granted
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 50
- 238000003780 insertion Methods 0.000 claims abstract description 25
- 230000037431 insertion Effects 0.000 claims abstract description 25
- 238000007639 printing Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000004575 stone Substances 0.000 description 4
- 238000000429 assembly Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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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
- 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 molding machine with such a guide device.
- the production of concrete moldings, such as. B. paving stones typically takes place in the context of a machine production by means of a molding machine with a stamp unit and a molded lower part designed as a mold, in which the stamp unit can engage.
- One or more mold cavities that are open upwards and downwards are usually formed in the lower mold part.
- the lower part of the mold is placed on a horizontal base with a lower boundary plane of a stone field, which closes the lower openings of the mold.
- the mold cavities are filled with a quantity of concrete through the upper openings, which is then pressed over pressure plates arranged on the stamp unit, in which the pressure plates are sunk into the mold cavities through the upper openings. Subsequently, by shaking the base, the concrete mass solidifies to form stable concrete molded parts. These are removed from the mold through the lower openings in the mold cavities.
- the stamp unit is connected to a typically hydraulically actuated vertical movement unit of the molding machine and can be moved vertically by means of this.
- the connection can be made in a customary construction via a load unit, which usually forms an upper part of the mold with the stamp unit as a unit that can be handled in a uniform manner.
- a block mold for the production of concrete blocks which comprises an upper mold part with at least one punch 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 part of the mold can be placed on a base of the block of the block molding machine and the upper part of the mold can be coupled to a machine holder of the block-making machine that can be moved up and down.
- a filling box of the block molding machine can be moved over the lower part of the mold and the upper part of the mold and / or the lower part of the mold has clearance to a machine frame of the block molding machine.
- a centering device is provided for aligning the lower mold part and the upper mold part in an xy plane. Exact centering of the two molded parts with respect to one another is brought about here, with a conical section on the centering device slowly releasing the centering of the molded parts again after the pressure piece has dipped into the mold cavity.
- a device for producing concrete moldings in a molding machine which has an upper mold part with at least one plunger for transmitting a force to at least one pressure plate comprises, wherein the pressure plate can be inserted 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 so that the lower mold part against the upper mold part from the vertical direction is tiltable during the engagement of the pressure plates in the openings of the mold cavity.
- the object of the invention is to create a guide device in a molding machine and molding machine with such a guide device, in which the centering between the upper and lower mold parts is further improved by the guide device exhibiting little wear.
- a guide device is created in a molding machine which comprises an upper mold part for transmitting a compressive force to at least one pressure plate, which can be inserted in the direction of insertion into an opening of a lower mold part, with a magnetizable first guide element assigned to the upper mold part and a magnetizable second guide element assigned to the lower mold part which overlap each other outside the opening in at least two positions along the insertion direction 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 insertion direction when the pressure plate is inserted into the lower mold part by means of a magnetic force between the guide elements, with the second guide element are arranged on at least two diagonally opposite corner regions of the opening outside the mold cavity on the frame, and the first guide element is attached to one of the pressure plates dneten plunger 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. Because of the contactless 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, there is another advantage that vibration energy losses are reduced.
- the lower part of the mold is further compressed by means of a load unit via a vibrating table after the amount of concrete has been filled in and a pressure has been applied.
- mechanical guidance between the upper part of the mold and the lower part of the mold removes energy from this process, which must be taken into account when designing the operating parameters of the vibrating table.
- the magnetic guide according to the invention provides a remedy here. Due to the magnetic guidance by means of the two Guide elements can be used to ensure that pressure plates of the upper part of the mold cannot come into contact with side walls in the lower part of the mold, thereby preventing possible damage to both the lower part of the mold and the pressure plates.
- the run-in chamfer on the walls of the lower mold part which has hitherto been customary in the prior art, can thus be omitted, whereby corresponding wear in the area of the upper edge of the lower mold part can also be avoided.
- a subsequent, very time-consuming welding of the upper edge of the lower part of the mold is therefore no longer necessary.
- this also reduces the production costs of the lower part of the mold, since the elevation of the shape of the lower part of the mold can be chosen to be lower, since no area needs to be provided for the run-in chamfer.
- the first guide element or the second guide element in order to generate the magnetic force, has a plurality of permanent magnets or electromagnets on a top side facing the other guide element in the guide area.
- the provision of the magnetic force by means of permanent magnets is a simple and inexpensive way of creating a magnetic guide device, in other applications it can be advantageous 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 part of the mold and the lower part of the mold are possible.
- the magnets in the guide area can be designed in different ways, with provision being made to arrange appropriate permanent magnets or electromagnets both on the first guide element and on the second guide element.
- a magnetic bearing is also possible by arranging magnets only on the first guide element or on the second guide element conceivable since, for example, corresponding eddy currents would be generated on the other guide element.
- the guide area is provided with magnets in such a way that the magnetic force is maintained along the direction of insertion of the printing plates over a greater distance, so that the lower part of the mold can be centered on the upper part of the molding machine. Switching off the electromagnets can also increase the efficiency of the shaking process, as no more energy is extracted from it.
- the field course and thus the magnetic force between the first guide element and the second guide element can be influenced by selecting a corresponding polarity of individual magnets. It is also conceivable here that a residual force can also be generated in the axial direction, ie parallel to the insertion direction.
- the first guide element and the second guide element are arranged on two diagonally opposite corner areas or in square areas of the opening.
- the guide device creates a translational degree of freedom along the insertion direction, with a corresponding centering taking place in the plane of the pressure plates.
- the centering can take place via two guide areas, preferably attached to opposite corners of the lower mold part, or in all square areas. In principle, two possibilities are conceivable here.
- the corner areas can each surround an opening.
- the lower part of the mold has guide devices for each combination of pressure plate and associated opening. Usually, a large number of openings, each provided with its own pressure plate, complement each other to form a mold cavity in the Mold lower part, it being possible for corresponding guide elements to be arranged in the corner areas of the mold lower part at two or four positions. While the first variant creates a magnetic guide for each printing plate, the second variant provides a magnetic guide 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 part of the mold in a machine frame.
- the guide device can advantageously be fastened to the lower part of the mold in such a way that the guide only takes place between the upper part of the mold and the lower part of the mold, 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 the upper and lower mold parts, so that when one or both parts are changed, the other components of the molding machine do not have to be modified. This is also advantageous 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 insertion direction.
- the guide device would thus create a degree of freedom of rotation in which the tilt angle is typically limited to 1 to 2 °, as has already been advantageously implemented from the prior art for mechanical guides.
- the guide area in which the magnets of the first guide element and of the second guide element typically face one another, can be designed in different ways. So it is possible that the first guide element and the second guide element with corresponding Surfaces are formed which are configured, for example, as angled wall surfaces along the insertion direction. Typically, an L-shaped or V-shaped configuration of the guide elements was selected here, the second guide element being able to be arranged on a frame surrounding the opening and the first guide element being able to be arranged transversely to the insertion direction to the second guide element.
- first guide element or the second guide element can enclose the 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 in the form of a socket.
- the insertion element completely surrounds the other, so that both a magnetic guide and a magnetic bearing can be formed which allow the upper mold part to be centered with respect to the lower mold part.
- a molding machine for the production of concrete blocks is specified with a guide device as described above.
- the magnetic force can be adjustable or controllable.
- the magnetic force is maintained during the threading of pressure plates into the opening, during the compaction of the concrete quantity 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 through 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 on the lower mold part during installation.
- the guide device can advantageously support the installation of the lower part of the mold in the molding machine with an inlet chamfer arranged on the first guide element or the second guide element.
- FIG 1 a part of a molding machine FM is shown as it is used for the production of concrete moldings by compressing a quantity of concrete.
- the part shown here includes those parts which cause the shaping of the concrete moldings when the concrete mass is compressed.
- the other 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 amount of concrete and a usually hydraulically operated device for compressing the amount of concrete are known to those skilled in the art.
- the FM molding machine is in Fig. 1 shown in a perspective side view. It can be seen that an upper mold part FO is connected to a plurality of pressure plates DP, with the upper mold part FO being able to be moved in the direction of an insertion direction ER via a loading unit (not shown). Corresponding stamps ST are provided between the printing plates DP and the upper part FO, which hold the printing plates DP on the upper part FO. All of the printing plates DP are connected via their stamp ST by means of a pressure stamp plate DS, so that the pressure plates DP can still move up and down together via the loading unit (not shown). During the downward movement, the pressure plates DP engage in corresponding openings OE of a lower mold part FU. The openings OE are surrounded by a frame RA. The frame RA has two opposite one another Pages fastening devices BV by means of which the lower mold part FU is fastened to the above-mentioned machine frame.
- a quantity of concrete is poured into the openings OE, so that after the pressure plates DP have penetrated along the insertion direction ER, the quantity of concrete 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 several openings OE, which are separated from one another by appropriately shaped side walls SW. A plurality of such openings is typically referred to as a mold cavity.
- no run-in bevel is provided on the upper edge KA of the side walls SW of the lower mold part FU.
- This is achieved by centering the upper mold part FO and lower mold part FU by means of a guide device which, as in FIG Fig. 1 is shown, has a first guide element FE1 and a second guide element FE2.
- the first guide element FE1 is assigned to the upper part of the mold.
- 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 which corresponds to a frame formed outside the mold cavity.
- Figure 2a shows the underside of the lower mold part opposite to the insertion direction ER.
- Figure 2b corresponds to a detailed view of a corner area Figure 2a .
- the lower mold part FU has several 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 respectively arranged on the lower mold part FU in all four corner regions EB.
- the second guide element FE2 is designed with wall surfaces on the lower part of the mold, which can have an angle of 90 ° to one another.
- the first guide element FE1 which corresponds to the upper mold part.
- the magnets MA can be designed both as permanent magnets and 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 plunger plate DS.
- the plunger plate DS is shaped so 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 plunger plate DS is selected so that the first guide element FE1 and the second guide element FE2 are at the predefined distance of the Spalts 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 expansion along the insertion direction ER AD1, which is selected to be greater than a second dimension AD2 of the second guide element FE2. Thus, the first guide element FE1 and the second guide element FE2 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 a further embodiment of the invention is shown.
- the guide elements FE1 and FE2 are not formed with corresponding surfaces, but are arranged such 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.
- FIGs 5a and 5b the corresponding arrangement of the guide elements FE1 and FE2 in the corner areas EB of the lower mold part is shown accordingly.
- a corresponding gap SP is formed between the first guide element FE1 and the second guide element FE2.
- the second guide element FE2 is in turn arranged on the outer sides of the frame RA and the fastening device BV.
- the first guide element FE1 is attached to the plunger plate DS.
- 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 in the guide area with a plurality of magnets MA on its upper side.
- the second guide element FE2 is designed in the form of a bushing or a hollow cylinder the inside of which also has a plurality of magnets MA arranged.
- the first guide element FE1 is in turn formed with an inlet chamfer EF.
- the magnets MA can both in the execution according to Figures 4 to 6 as well as in the execution according to Figure 1 to 3 be formed by both permanent magnets and electromagnets. While in the first case a simple but nevertheless reliable guidance between the upper mold part FO and the lower mold part FU is possible, in the second case a control or adjustability of the magnetic force can also be achieved.
- the control can influence the magnetic force at different times of operation of the molding machine FM accordingly in order to maintain, for example, during a threading of pressure plates DP into the opening OE, during a compression of the amount of concrete 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 through the guidance of the lower mold part FU in the upper mold part FO.
Abstract
Es wird eine Führungseinrichtung in einer Formmaschine (FM) und eine Formmaschine (FM) mit einer derartigen Führungseinrichtung (FE) angegeben, die ein Formoberteil (FO) zur Übertragung einer Druckkraft auf wenigstens eine Druckplatte (DP) umfasst, die in Einschubrichtung (ER) in eine Öffnung (OE) eines Formunterteils (FU) einführbar ist, wobei dem Formoberteil (FO) ein magnetisierbares erstes Führungselement (FE1) und dem Formunterteil (FU) ein magnetisierbares zweites Führungselement (FE2) zugeordnet sind, die sich außerhalb der Öffnung (OE) an wenigstens zwei Positionen entlang der Einschubrichtung (ER) berührungslos in einem Führungsbereich überlappen, so dass das Formunterteil (FU) mittels einer magnetischen Kraft zwischen dem ersten Führungselement (FE1) und dem zweiten Führungselement (FE2) einen quer zur Einschubrichtung (ER) verlaufenden vordefinierten Abstand (SP) zum Formoberteil (FO) beim Einführen der Druckplatte (DP) in das Formunterteil (FU) einhält.A guide device in a molding machine (FM) and a molding machine (FM) with such a guide device (FE) are specified, which comprises an upper mold part (FO) for transferring a compressive force to at least one printing plate (DP) which extends in the direction of insertion (ER) can be introduced into an opening (OE) of a lower mold part (FU), the upper mold part (FO) being assigned a magnetizable first guide element (FE1) and a magnetizable second guide element (FE2) assigned to the lower mold part (FU), which are located outside the opening (OE ) overlap without contact in a guide area at at least two positions along the insertion direction (ER) so that the lower mold part (FU) runs transversely to the insertion direction (ER) by means of a magnetic force between the first guide element (FE1) and the second guide element (FE2) the predefined distance (SP) to the upper part of the mold (FO) when inserting the pressure plate (DP) into the lower part of the mold (FU).
Description
Die Erfindung betrifft eine Führungseinrichtung für eine Formmaschine und Formmaschine mit einer solchen Führungseinrichtung.The invention relates to a guide device for a molding machine and molding machine with such a guide device.
Die Herstellung von Betonformteilen, wie z. B. Pflastersteine erfolgt typischerweise im Rahmen einer maschinellen Fertigung mittels einer Formmaschine mit einer Stempeleinheit und ein als Form ausgebildetes Formunterteil, in das die Stempeleinheit eingreifen kann. In dem Formunterteil sind üblicherweise ein oder mehrere Formnester ausgebildet, die nach oben und unten geöffnet sind. Das Formunterteil wird mit einer unteren Begrenzungsebene eines Steinfelds auf eine horizontale Unterlage aufgesetzt, die die unteren Öffnungen der Form verschließt. Durch die oberen Öffnungen werden die Formnester mit Betongemenge befüllt, das anschließend über an der Stempeleinheit angeordnete Druckplatten gepresst wird, in dem die Druckplatten durch die oberen Öffnungen in die Formnester eingesenkt werden. Anschließend erfolgt durch Rütteln der Unterlage eine Verfestigung des Betongemenges zu formstabilen Betonformteilen. Diese werden durch die unteren Öffnungen der Formnester entformt.The production of concrete moldings, such as. B. paving stones typically takes place in the context of a machine production by means of a molding machine with a stamp unit and a molded lower part designed as a mold, in which the stamp unit can engage. One or more mold cavities that are open upwards and downwards are usually formed in the lower mold part. The lower part of the mold is placed on a horizontal base with a lower boundary plane of a stone field, which closes the lower openings of the mold. The mold cavities are filled with a quantity of concrete through the upper openings, which is then pressed over pressure plates arranged on the stamp unit, in which the pressure plates are sunk into the mold cavities through the upper openings. Subsequently, by shaking the base, the concrete mass solidifies to form stable concrete molded parts. These are removed from the mold through the lower openings in the mold cavities.
Die Stempeleinheit ist mit einer typischerweise hydraulisch betätigten Vertikalbewegungseinheit der Formmaschine verbunden und mittels dieser vertikal verfahrbar. Die Verbindung kann in gebräuchlicher Bauweise über eine Auflasteinheit gegeben sein, die gewöhnlich mit der Stempeleinheit ein Formoberteil als einheitlich handhabbare Baugruppe bildet. Mittels eines Anschlags an Stempeln der Stempeleinheit wird eine gleichmäßige Steinhöhe auch bei unterschiedlicher Verdichtung des Betongemenges erreicht.The stamp unit is connected to a typically hydraulically actuated vertical movement unit of the molding machine and can be moved vertically by means of this. The connection can be made in a customary construction via a load unit, which usually forms an upper part of the mold with the stamp unit as a unit that can be handled in a uniform manner. By means of a stop on the stamps of the stamp unit, a uniform stone height is achieved even if the amount of concrete is differently compacted.
Bei bekannten Formmaschinen kommt der Verbindung zwischen dem Formoberteil und dem Formunterteil eine besondere Bedeutung zu. So ist beispielsweise aus der
Aus der
Aus der
In der
Es ist Aufgabe der Erfindung, eine Führungseinrichtung in einer Formmaschine und Formmaschine mit einer solchen Führungseinrichtung zu schaffen, bei der die Zentrierung zwischen Formoberteil und Formunterteil weiter verbessert wird, indem die Führungseinrichtung einen geringen Verschleiß aufwiest.The object of the invention is to create a guide device in a molding machine and molding machine with such a guide device, in which the centering between the upper and lower mold parts is further improved by the guide device exhibiting little wear.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen der Erfindung sind jeweils Gegenstand der Unteransprüche. Diese können in technologisch sinnvoller Weise miteinander kombiniert werden. Die Beschreibung, insbesondere im Zusammenhang mit der Zeichnung, charakterisiert und spezifiziert die Erfindung zusätzlich.This object is achieved by the features of
Gemäß der Erfindung wird eine Führungseinrichtung in einer Formmaschine geschaffen, die ein Formoberteil zur Übertragung einer Druckkraft auf wenigstens eine Druckplatte umfasst, die in Einschubrichtung in eine Öffnung eines Formunterteils einführbar ist, wobei dem Formoberteil ein magnetisierbares erstes Führungselement und dem Formunterteil ein magnetisierbares zweites Führungselement zugeordnet sind, die sich außerhalb der Öffnung an wenigstens zwei Positionen entlang der Einschubrichtung berührungslos in einem Führungsbereich überlappen, so dass das Formunterteil mittels einer magnetischen Kraft zwischen den Führungselementen einen quer zur Einschubrichtung verlaufenden vordefinierten Abstand zum Formoberteil beim Einführen der Druckplatte in das Formunterteil einhält, wobei das zweite Führungselement an wenigstens zwei diagonal gegenüberliegenden Eckbereichen der Öffnung außerhalb des Formnests am Rahmen angeordnet sind und das erste Führungselement an einer der Druckplatte zugeordneten Druckstempelplatte befestigt ist.According to the invention, a guide device is created in a molding machine which comprises an upper mold part for transmitting a compressive force to at least one pressure plate, which can be inserted in the direction of insertion into an opening of a lower mold part, with a magnetizable first guide element assigned to the upper mold part and a magnetizable second guide element assigned to the lower mold part which overlap each other outside the opening in at least two positions along the insertion direction 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 insertion direction when the pressure plate is inserted into the lower mold part by means of a magnetic force between the guide elements, with the second guide element are arranged on at least two diagonally opposite corner regions of the opening outside the mold cavity on the frame, and the first guide element is attached to one of the pressure plates dneten plunger plate is attached.
Demnach wird eine Führungseinrichtung geschaffen, bei der das Formoberteil und das Formunterteil der Formmaschine mittels einer Magnetführung zueinander ausgerichtet sind. Aufgrund der berührungslosen Führung mittels der erfindungsgemäßen Führungseinrichtung ist es somit möglich, Verschleiß der Führungseinrichtung zu vermeiden bzw. zu verringern. Neben den im Vergleich zu mechanischen Führungen verbesserten Standzeiten besteht ein weiterer Vorteil darin, dass Rüttelenergieverluste verringert werden. Üblicherweise wird bei der Herstellung von Betonformsteinen das Formunterteil nach Einfüllen des Betongemenges und einer Druckbeaufschlagung mittels einer Auflasteinheit über einen Rütteltisch weiter komprimiert. Eine mechanische Führung zwischen dem Formoberteil und dem Formunterteil entzieht jedoch diesem Prozess Energie, was bei der Auslegung der Betriebsparameter des Rütteltisches entsprechend berücksichtigt werden muss. Die magnetische Führung gemäß der Erfindung schafft hier Abhilfe. Aufgrund der magnetischen Führung mittels der beiden Führungselemente kann sichergestellt werden, dass Druckplatten des Formoberteils nicht mit Seitenwänden im Formunterteil in Berührung kommen können, wodurch mögliche Beschädigungen sowohl am Formunterteil als auch an den Druckplatten verhindert werden können. Die bisher im Stand der Technik übliche Einlauffase an den Wänden des Formunterteils kann somit entfallen, wodurch auch entsprechende Abnutzung im Bereich der Oberkante des Formunterteils vermieden werden kann. Ein nachträgliches, sehr zeitintensives Aufschweißen der Oberkante des Formunterteils ist daher nicht mehr notwendig. Dadurch werden aber auch die Bereitstellungskosten des Formunterteils reduziert, da die Überhöhung der Form des Formunterteils geringer gewählt werden kann, da kein Bereich mehr für die Einlauffase vorgesehen werden muss.Accordingly, 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. Because of the contactless 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, there is another advantage that vibration energy losses are reduced. Usually, in the production of concrete blocks, the lower part of the mold is further compressed by means of a load unit via a vibrating table after the amount of concrete has been filled in and a pressure has been applied. However, mechanical guidance between the upper part of the mold and the lower part of the mold removes energy from this process, which must be taken into account when designing the operating parameters of the vibrating table. The magnetic guide according to the invention provides a remedy here. Due to the magnetic guidance by means of the two Guide elements can be used to ensure that pressure plates of the upper part of the mold cannot come into contact with side walls in the lower part of the mold, thereby preventing possible damage to both the lower part of the mold and the pressure plates. The run-in chamfer on the walls of the lower mold part, which has hitherto been customary in the prior art, can thus be omitted, whereby corresponding wear in the area of the upper edge of the lower mold part can also be avoided. A subsequent, very time-consuming welding of the upper edge of the lower part of the mold is therefore no longer necessary. However, this also reduces the production costs of the lower part of the mold, since the elevation of the shape of the lower part of the mold can be chosen to be lower, since no area needs to be provided for the run-in chamfer.
Gemäß einer Ausführungsform der Erfindung weist zur Erzeugung der magnetischen Kraft das erste Führungselement oder das zweite Führungselement auf einer dem anderen Führungselement zuweisenden Oberseite im Führungsbereich eine Vielzahl von Permanentmagneten oder Elektromagneten auf.According to one embodiment of the invention, in order to generate the magnetic force, the first guide element or the second guide element has a plurality of permanent magnets or electromagnets on a top side facing the other guide element in the guide area.
Während das Bereitstellen der magnetischen Kraft mittels Permanentmagneten eine einfache und kostengünstige Möglichkeit zur Schaffung einer magnetischen Führungseinrichtung darstellt, kann es in anderen Anwendungsfällen vorteilhaft sein, mittels Elektromagneten die magnetische Lagerkraft entsprechend einstellbar zu gestalten. Dabei ist sowohl die Vorgabe eines vorherbestimmten Wertes als auch die aktive Einstellbarkeit zur Dämpfung der Relativbewegung zwischen Formoberteil und Formunterteil möglich. Die Ausgestaltung der Magneten im Führungsbereich kann dabei auf unterschiedliche Weise erfolgen, wobei es sowohl vorgesehen ist, sowohl auf dem ersten Führungselement als auch auf dem zweiten Führungselement entsprechende Permanent- oder Elektromagnete anzuordnen. Ein magnetisches Lager ist jedoch auch durch Anordnen von Magneten lediglich am ersten Führungselement oder am zweiten Führungselement denkbar, da beispielsweise am anderen Führungselement entsprechende Wirbelströme erzeugt werden würden. Neben einer Vielzahl einzelner Magnete, die beispielsweise in einer Matrixform angeordnet sein können, ist auch das Anbringen großflächiger Magnete möglich. Der Führungsbereich wird dabei so mit Magneten versehen, dass die magnetische Kraft entlang der Einschubrichtung der Druckplatten über eine größere Wegstrecke erhalten bleibt, so dass das Formunterteil zum Formoberteil in der Formmaschine zentriert werden kann. Durch ein Abschalten der Elektromagnete kann auch die Effizienz beim Rüttelvorgang gesteigert werden, da diesem keine Energie mehr entzogen wird. Bei der Anordnung der Vielzahl einzelner Magnete in Matrixform kann durch Wahl einer entsprechenden Polung einzelner Magnete der Feldverlauf und damit die magnetische Kraft zwischen dem ersten Führungselement und dem zweiten Führungselement beeinflusst werden. Hierbei ist es auch denkbar, dass zusätzlich eine residuale Kraft auch in axialer Richtung, d.h. parallel zur Einschubrichtung erzeugt werden kann.While the provision of the magnetic force by means of permanent magnets is a simple and inexpensive way of creating a magnetic guide device, in other applications it can be advantageous 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 part of the mold and the lower part of the mold are possible. The magnets in the guide area can be designed in different ways, with provision being made to arrange appropriate permanent magnets or electromagnets both on the first guide element and on the second guide element. However, a magnetic bearing is also possible by arranging magnets only on the first guide element or on the second guide element conceivable since, for example, corresponding eddy currents would be generated on the other guide element. In addition to a large number of individual magnets, which can be arranged in a matrix form, for example, it is also possible to attach large-area magnets. The guide area is provided with magnets in such a way that the magnetic force is maintained along the direction of insertion of the printing plates over a greater distance, so that the lower part of the mold can be centered on the upper part of the molding machine. Switching off the electromagnets can also increase the efficiency of the shaking process, as no more energy is extracted from it. With the arrangement of the large number of individual magnets in matrix form, the field course and thus the magnetic force between the first guide element and the second guide element can be influenced by selecting a corresponding polarity of individual magnets. It is also conceivable here that a residual force can also be generated in the axial direction, ie parallel to the insertion direction.
Gemäß einer weiteren Ausführungsform der Erfindung sind das erste Führungselement und das zweite Führungselement an zwei diagonal gegenüber liegenden Eckbereichen oder in Viereckbereichen der Öffnung angeordnet.According to a further embodiment of the invention, the first guide element and the second guide element are arranged on two diagonally opposite corner areas or in square areas of the opening.
Die erfindungsgemäße Führungseinrichtung schafft einen translatorischen Freiheitsgrad entlang der Einschubrichtung, wobei in der Ebene der Druckplatten eine entsprechende Zentrierung erfolgt. Hierbei kann die Zentrierung sowohl über zwei, vorzugsweise an gegenüber liegenden Ecken des Formunterteils angebrachte Führungsbereiche oder auch in allen Viereckbereichen erfolgen. Hierbei sind prinzipiell zwei Möglichkeiten denkbar. Zum einen können die Eckbereiche jeweils eine Öffnung umgeben. In diesem Fall weist das Formunterteil Führungseinrichtungen für jede Kombination aus Druckplatte und dazugehöriger Öffnung auf. Üblicherweise ergänzen sich eine Vielzahl von Öffnungen, die jeweils mit einer eigenen Druckplatte versehen sind, zu einem Formnest im Formunterteil, wobei in den Eckbereichen des Formunterteils an zwei oder vier Positionen entsprechende Führungselemente angeordnet sein können. Während die erstgenannte Variante eine magnetische Führung für jede Druckplatte schafft, wird bei der zweiten Variante eine magnetische Führung für eine gesamte Formmaschine bereitgestellt.The guide device according to the invention creates a translational degree of freedom along the insertion direction, with a corresponding centering taking place in the plane of the pressure plates. The centering can take place via two guide areas, preferably attached to opposite corners of the lower mold part, or in all square areas. In principle, two possibilities are conceivable here. On the one hand, the corner areas can each surround an opening. In this case, the lower part of the mold has guide devices for each combination of pressure plate and associated opening. Usually, a large number of openings, each provided with its own pressure plate, complement each other to form a mold cavity in the Mold lower part, it being possible for corresponding guide elements to be arranged in the corner areas of the mold lower part at two or four positions. While the first variant creates a magnetic guide for each printing plate, the second variant provides a magnetic guide for an entire molding machine.
Gemäß einer weiteren Ausführungsform der Erfindung ist das zweite Führungselement an Außenseiten des Rahmens und einer Befestigungsvorrichtung zur Befestigung des Formunterteils in einem Maschinenrahmen angeordnet.According to a further embodiment of the invention, the second guide element is arranged on the outside of the frame and a fastening device for fastening the lower part of the mold in a machine frame.
Die Führungseinrichtung lässt sich vorteilhafterweise so am Formunterteil befestigen, dass die Führung lediglich zwischen Formoberteil und Formunterteil erfolgt, ohne dabei die übrigen Komponenten der Formmaschine, wie Auflasteinrichtung oder Maschinenrahmen berücksichtigen zu müssen. Die Führungseinrichtung ist somit auf die Kombination aus Formoberteil und Formunterteil abgestimmt, so das bei Wechsel eines oder beider Teile keine Umbauten an den übrigen Komponenten der Formmaschine vorgenommen werden müssen. Dies ist auch bei Änderungen an der Steinhöhe vorteilhaft.The guide device can advantageously be fastened to the lower part of the mold in such a way that the guide only takes place between the upper part of the mold and the lower part of the mold, 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 the upper and lower mold parts, so that when one or both parts are changed, the other components of the molding machine do not have to be modified. This is also advantageous when changing the stone height.
Die Führungseinrichtung kann dabei so ausgestaltet sein, dass das Formunterteil gegen das Formoberteil entlang der Einschubrichtung kippbar ist. Die Führungseinrichtung wurde somit einen Rotationsfreiheitsgrad schaffen, bei dem der Kippwinkel typischerweise auf 1 bis 2° beschränkt wird, wie dies bereits aus dem Stand der Technik bei mechanischen Führungen vorteilhaft realisiert wurde.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 insertion direction. The guide device would thus create a degree of freedom of rotation in which the tilt angle is typically limited to 1 to 2 °, as has already been advantageously implemented from the prior art for mechanical guides.
Im Führungsbereich, bei dem sich typischerweise die Magnete des ersten Führungselements und des zweiten Führungselements gegenüberstehen, können auf unterschiedliche Weise ausgebildet sein. So ist es möglich, dass das erste Führungselement und das zweite Führungselement mit korrespondierenden Oberflächen ausgebildet sind, die beispielsweise als gewinkelte Wandflächen entlang der Einschubrichtung ausgestaltet sind. Typischerweise wurde hier eine L-förmige oder V-förmige Ausgestaltung der Führungselemente gewählt werden, wobei das zweite Führungselement an einem die Öffnung umgebenden Rahmen angeordnet sein kann und das erste Führungselement quer zur Einschubrichtung beabstandete zum zweiten Führungselement angeordnet werden könnte.The guide area, in which the magnets of the first guide element and of the second guide element typically face one another, can be designed in different ways. So it is possible that the first guide element and the second guide element with corresponding Surfaces are formed which are configured, for example, as angled wall surfaces along the insertion direction. Typically, an L-shaped or V-shaped configuration of the guide elements was selected here, the second guide element being able to be arranged on a frame surrounding the opening and the first guide element being able to be arranged transversely to the insertion direction to the second guide element.
In einer anderen Ausgestaltung kann das erste Führungselement oder das zweite Führungselement das jeweils andere Führungselement umschließen, wobei hier bevorzugt das erste Führungselement in Form eines Stiftes und das zweite Führungselement in Form einer Buchse ausgebildet sein können.In another embodiment, the first guide element or the second guide element can enclose the 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 in the form of a socket.
Gemäß dieser Ausführungsform umschließt das Einführungselement das andere vollständig, so dass sowohl eine magnetische Führung als auch ein magnetisches Lager ausgebildet werden können, die eine Zentrierung des Formoberteils gegenüber dem Formunterteil erlauben.According to this embodiment, the insertion element completely surrounds the other, so that both a magnetic guide and a magnetic bearing can be formed which allow the upper mold part to be centered with respect to the lower mold part.
Desweiteren wird eine Formmaschine zur Herstellung von Betonformsteinen mit einer Führungseinrichtung angegeben, wie sie oben beschrieben wurde.Furthermore, a molding machine for the production of concrete blocks is specified with a guide device as described above.
Bei einer derartigen Formmaschine kann die magnetische Kraft einstellbar oder steuerbar sein. Die magnetische Kraft bleibt dabei während eines Einfädelns von Druckplatten in die Öffnung, während einer Verdichtung des Betongemenges oder während eines Entschalvorgangs des Betonformsteins aufrechterhalten.In such a molding machine, the magnetic force can be adjustable or controllable. The magnetic force is maintained during the threading of pressure plates into the opening, during the compaction of the concrete quantity or during a demolding process of the concrete block.
Vorteilhafterweise kann die magnetische Kraft während eines Rüttelvorgangs verringert werden oder gänzlich fehlen, um dem Rüttelvorgang keine Energie durch die Führung des Formunterteils im Formoberteil zu entziehen.Advantageously, the magnetic force can be reduced or completely absent during a shaking process in order not to withdraw any energy from the shaking process through the guidance of the lower mold part in the upper mold part.
Die magnetische Kraft kann darüber hinaus auch beim Einbau des Formunterteils in die Formmaschine vorliegen, so dass eine Zentrierung von Formoberteil zum Formunterteil während des Einbaus möglich ist.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 on the lower mold part during installation.
Vorteilhafterweise kann die Führungseinrichtung das Einbauen des Formunterteils in die Formmaschine mit einer an dem ersten Führungselement oder dem zweiten Führungselement angeordneten Einlauffase unterstützen.The guide device can advantageously support the installation of the lower part of the mold in the molding machine with an inlet chamfer arranged on the first guide element or the second guide element.
Nachfolgend werden einige Ausführungsbeispiele anhand der Zeichnungen näher erläutert. Es zeigen:
- Fig. 1
- eine Formmaschine mit einer Führungseinrichtung gemäß einer Ausführungsform der Erfindung in einer perspektivischen Seitenansicht,
- Fig. 2a
- die Formmaschine aus
Fig. 1 in einer Ansicht von ihrer Unterseite, - Fig. 2b
- die Formmaschine aus
Fig. 2a in einer Detailansicht, - Fig. 3
- die Führungseinrichtung aus
Fig. 1 in einer weiteren perspektivischen Seitenansicht, - Fig. 4
- eine Formmaschine mit einer Führungseinrichtung gemäß einer weiteren Ausführungsform der Erfindung in einer perspektivischen Seitenansicht,
- Fig. 5a
- die Formmaschine aus
Fig. 4 in einer Ansicht von ihrer Unterseite, - Fig. 5b
- die Formmaschine aus
Fig. 5a in einer Detailansicht, - Fig. 6
- die Führungseinrichtung aus
Fig. 4 in einer weiteren perspektivischen Seitenansicht.
- Fig. 1
- a molding machine with a guide device according to an embodiment of the invention in a perspective side view,
- Fig. 2a
- the molding machine off
Fig. 1 in a view from below, - Figure 2b
- the molding machine off
Fig. 2a in a detailed view, - Fig. 3
- the guide device
Fig. 1 in another perspective side view, - Fig. 4
- a molding machine with a guide device according to a further embodiment of the invention in a perspective side view,
- Figure 5a
- the molding machine off
Fig. 4 in a view from below, - Figure 5b
- the molding machine off
Figure 5a in a detailed view, - Fig. 6
- the guide device
Fig. 4 in another perspective side view.
In den Figuren sind gleiche oder funktional gleich wirkende Bauteile mit den gleichen Bezugszeichen versehen.In the figures, identical or functionally identical components are provided with the same reference symbols.
In
Die Formmaschine FM ist in
In die Öffnungen OE wird beim Betrieb der Formmaschine FM ein Betongemenge eingefüllt, so dass nach Eindringen der Druckplatten DP entlang der Einschubrichtung ER eine Komprimierung des Betongemenges möglich ist. Das Formunterteil FU wird üblicherweise auf dem oben erwähnten Rütteltisch abgelegt.During operation of the molding machine FM, a quantity of concrete is poured into the openings OE, so that after the pressure plates DP have penetrated along the insertion direction ER, the quantity of concrete can be compressed. The lower mold part FU is usually placed on the vibrating table mentioned above.
Neben der Produktion eines einzelnen Betonformsteins wird typischerweise das Formunterteil FU in mehrere Öffnungen OE unterteilt, die über entsprechend geformte Seitenwände SW voneinander abgetrennt sind. Eine Vielzahl derartiger Öffnungen wird typischerweise als Formnest bezeichnet. An der oberen Kante KA der Seitenwände SW des Formunterteils FU ist erfindungsgemäß keine Einlauffase vorgesehen. Dies wird dadurch erreicht, dass die Zentrierung von Formoberteil FO und Formunterteil FU mittels einer Führungseinrichtung erfolgt, die wie in
Die Positionierung der Führungseinrichtung FE mittels des ersten Führungselements FE1 und des zweiten Führungselements FE2 wird nachfolgend unter Bezugnahme auf die
Man erkennt, dass am Formunterteil FU in allen vier Eckbereichen EB jeweils das erste Führungselement FE1 und das zweite Führungselement FE2 angeordnet sind. Das zweite Führungselement FE2 ist dabei mit Wandflächen am Formunterteil ausgebildet, die einen Winkel von 90° zueinander aufweisen können. In einem vordefinierten Abstand, in
Das zweite Führungselement FE2 ist mit einer Wandfläche an einer Außenseite des Rahmens RA und mit der anderen Wandfläche an einer Außenseite der Befestigungsvorrichtung BV angeordnet. Das erste Führungselement FE1 ist an der Druckstempelplatte DS befestigt. Die Druckstempelplatte DS ist dabei so geformt, dass sie die Außenseite des Rahmens RA und der Befestigungsvorrichtung BV überspannt und die Position des ersten Führungselements FE1 an der Druckstempelplatte DS ist so gewählt, dass das erste Führungselement FE1 und das zweite Führungselement FE2 in dem vordefinierten Abstand des Spalts SP zu liegen kommen.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 plunger plate DS. The plunger plate DS is shaped so 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 plunger plate DS is selected so that the first guide element FE1 and the second guide element FE2 are at the predefined distance of the Spalts SP come to rest.
In
In
In den
In
Die Magnete MA können sowohl bei der Ausführung gemäß
Die Steuerung kann dabei die magnetische Kraft zu unterschiedlichen Betriebszeitpunkten der Formmaschine FM entsprechend beeinflussen, um beispielsweise während eines Einfädelns von Druckplatten DP in die Öffnung OE, während einer Verdichtung des Betongemenges in der Öffnung OE beim Eindringen der Druckplatten DP oder während eines Entschalvorgangs des Betonformsteins aufrechtzuerhalten. Vorteilhafterweise kann die magnetische Kraft während eines Rüttelvorgangs verringert werden oder gänzlich fehlen, um dem Rüttelvorgang keine Energie durch die Führung des Formunterteils FU im Formoberteil FO zu entziehen.The control can influence the magnetic force at different times of operation of the molding machine FM accordingly in order to maintain, for example, during a threading of pressure plates DP into the opening OE, during a compression of the amount of concrete in the opening OE when the pressure plates DP penetrate or during a demolding process of the concrete block . Advantageously, the magnetic force can be reduced or completely absent during a shaking process in order not to withdraw any energy from the shaking process through the guidance of the lower mold part FU in the upper mold part FO.
Die vorstehend und die in den Ansprüchen angegebenen sowie die den Abbildungen entnehmbaren Merkmale sind sowohl einzeln als auch in verschiedener Kombination vorteilhaft realisierbar. Die Erfindung ist nicht auf die beschriebenen Ausführungsbeispiele beschränkt, sondern im Rahmen fachmännischen Könnens in mancherlei Weise abwandelbar.The features indicated above and in the claims as well as those which can be inferred from the figures can advantageously be implemented both individually and in various combinations. The invention is not limited to the exemplary embodiments described, but can be modified in many ways within the scope of the skilled person.
- AD1AD1
- erste Ausdehnungfirst expansion
- AD2AD2
- zweite Ausdehnungsecond expansion
- BVBV
- BefestigungsvorrichtungFastening device
- DPDP
- Druckplatteprinting plate
- DSDS
- DruckstempelplatteRam plate
- EBEB
- EckbereichCorner area
- EFEF
- EinlauffaseRun-in chamfer
- EF'EF '
- weitere Einlauffasefurther run-in bevel
- ERHE
- EinschubrichtungDirection of insertion
- FEFE
- FührungseinrichtungGuide device
- FE1FE1
- erstes Führungselementfirst guide element
- FE2FE2
- zweites Führungselementsecond guide element
- FMFM
- FormmaschineMolding machine
- FNFN
- FormnestMold cavity
- FOFO
- FormoberteilMold top
- FUFU
- FormunterteilLower part of the mold
- KAKA
- obere Kanteupper edge
- MAMA
- Magnetmagnet
- OEOE
- Öffnungopening
- RARA
- Rahmenframe
- SPSP
- Spaltgap
- STST
- Stempelstamp
- SWSW
- SeitenwandSide wall
Claims (15)
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DE102019108574.8A DE102019108574A1 (en) | 2019-04-02 | 2019-04-02 | Guide device in a molding machine and molding machine with such a guide device |
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EP3718718A1 true EP3718718A1 (en) | 2020-10-07 |
EP3718718B1 EP3718718B1 (en) | 2022-06-08 |
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EP (1) | EP3718718B1 (en) |
DE (1) | DE102019108574A1 (en) |
DK (1) | DK3718718T3 (en) |
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DE3638207A1 (en) | 1986-11-08 | 1988-05-11 | Netter Gmbh | Process for producing purpose-made concrete blocks, and apparatus for carrying out the process |
DE102005048930A1 (en) | 2004-11-12 | 2006-05-18 | Rampf Formen Gmbh | Block mould for production of concrete blocks, has mould upper piece and/or mould lower piece with play at chassis of block moulding machine, and centering device provided for aligning mould lower and upper pieces in xy plane |
DE102005054993A1 (en) | 2005-11-18 | 2007-05-31 | Kobra Formen Gmbh | Device for producing concrete blocks |
DE102015103829A1 (en) | 2015-03-16 | 2016-09-22 | Kobra Formen Gmbh | Device for the production of concrete moldings in a molding machine |
-
2019
- 2019-04-02 DE DE102019108574.8A patent/DE102019108574A1/en active Pending
-
2020
- 2020-04-02 EP EP20167773.9A patent/EP3718718B1/en active Active
- 2020-04-02 ES ES20167773T patent/ES2921311T3/en active Active
- 2020-04-02 PL PL20167773.9T patent/PL3718718T3/en unknown
- 2020-04-02 DK DK20167773.9T patent/DK3718718T3/en active
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---|---|---|---|---|
DE3638207A1 (en) | 1986-11-08 | 1988-05-11 | Netter Gmbh | Process for producing purpose-made concrete blocks, and apparatus for carrying out the process |
DE102005048930A1 (en) | 2004-11-12 | 2006-05-18 | Rampf Formen Gmbh | Block mould for production of concrete blocks, has mould upper piece and/or mould lower piece with play at chassis of block moulding machine, and centering device provided for aligning mould lower and upper pieces in xy plane |
DE102005054993A1 (en) | 2005-11-18 | 2007-05-31 | Kobra Formen Gmbh | Device for producing concrete blocks |
DE102015103829A1 (en) | 2015-03-16 | 2016-09-22 | Kobra Formen Gmbh | Device for the production of concrete moldings in a molding machine |
Also Published As
Publication number | Publication date |
---|---|
PL3718718T3 (en) | 2022-07-18 |
EP3718718B1 (en) | 2022-06-08 |
DK3718718T3 (en) | 2022-07-04 |
ES2921311T3 (en) | 2022-08-23 |
DE102019108574A1 (en) | 2020-10-08 |
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