EP0437858B1 - Apparatus for making blanks with pattern on the upper surface for bricks, tiles or the same - Google Patents

Apparatus for making blanks with pattern on the upper surface for bricks, tiles or the same Download PDF

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Publication number
EP0437858B1
EP0437858B1 EP90125774A EP90125774A EP0437858B1 EP 0437858 B1 EP0437858 B1 EP 0437858B1 EP 90125774 A EP90125774 A EP 90125774A EP 90125774 A EP90125774 A EP 90125774A EP 0437858 B1 EP0437858 B1 EP 0437858B1
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EP
European Patent Office
Prior art keywords
strand
transportation
stop
transverse conveyor
support plate
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EP90125774A
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German (de)
French (fr)
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EP0437858A2 (en
EP0437858A3 (en
Inventor
Norbert Hagemeister
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Ziegelwerk Wh Hagemeister KG
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Ziegelwerk Wh Hagemeister KG
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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
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
    • B28B11/10—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads by using presses

Definitions

  • the invention relates to a device according to the preamble of patent claim 1.
  • Such a device is described in DE-C-33 06 852.
  • This known device is set up to make a circumferential notch on the strand sections.
  • Three notch bars are used for this purpose, namely a first vertical notch bar, which is arranged on a cross slide, which pushes the strand sections transversely onto a cross belt conveyor from a first transport section that conveys the strand sections in the longitudinal direction of the strand, and a second, angular notch bar that can be displaced vertically above the cross belt conveyor is mounted that its horizontal notch leg is slidable against the top of the respective strand section, wherein its vertical notch leg extends downward from the transverse front end of the horizontal notch leg and forms a stop for the strand section advanced with the cross slide, and a third notch bar, which is arranged under the upper run of the cross belt conveyor and is vertically displaceably mounted.
  • the respective strand section with the cross slide is pushed from the first transport section onto the cross belt conveyor arranged next to the latter and pressed against the vertical notch leg forming a stop, vertical notches on the opposite side walls of the strand section by means of the cross slide and the vertical one Notch legs arranged notch ribs are notched.
  • the second notch bar is lowered against the strand section and the third notch bar is pushed up against the strand section, the notch being attached to the top and bottom of the bar section by means of the notch ribs attached to it.
  • the second notch bar is moved up so far that its vertical notch leg releases the strand section and this can be transported further with the cross belt conveyor.
  • emboss the corresponding surface pattern in the upper strand surface by means of a pressurized embossing roller rolling on the raw material strand, the peripheral surface of which is provided with the negative pattern.
  • the relatively small diameter of the embossing roller prevents a uniform impression of the surface pattern.
  • Another disadvantage of the embossing rollers is that complicated surface patterns, particularly those with depressions that run obliquely or transversely to the direction of transport of the raw material strand, cannot be impressed without errors, since very often an offset between the negative pattern on the embossing roller and caused, for example, by fluctuating consistency of the raw material whose impression occurs on the strand surface.
  • Such an offset affects both the quality of surface patterns which are self-contained, each associated with a blank, and that of surface patterns which are distributed over a plurality of blanks, are said to result in an overall pattern by joining them together.
  • the first-mentioned surface patterns can be arranged on two blanks in different ways, while in the last-mentioned surface patterns the joining together of the corresponding blanks does not match the overall pattern provided results.
  • the invention has for its object to design a device of the type mentioned above so that the strand sections can be embossed with a surface pattern.
  • the negative pattern is formed on an embossing die instead of on an embossing roll, it can be guided by appropriate guidance of the embossing die or of the raw material strand, at least during the actual embossing, when it is in engagement with the strand surface and pressed into or pulled out of it in a relative movement will be held immobile in its plane relative to the strand surface.
  • the negative pattern only performs the necessary relative movements relative to the strand surface perpendicular to it during the actual stamping. Cross movements of the negative pattern relative to the strand surface are excluded during the actual memorization.
  • the invention makes it possible in this way to impress even complex surface patterns of any configuration cleanly and in full accordance with the negative pattern. Offset and different impression depths do not occur.
  • the raw material strand can be cut into blanks at the intended locations without the self-contained surface pattern, which is assigned to a blank, being interrupted or the production of an overall pattern composed of surface patterns of several blanks being impaired.
  • the stamp is an upper stamp with which the surface pattern is stamped into the upper strand surface.
  • the surface pattern can also be embossed in the lower strand surface or in lateral strand surfaces with a correspondingly arranged embossing stamp and corresponding supports.
  • the surface pattern is embossed into strand sections separated from the raw material strand. This eliminates surface pattern distortions caused by stress relaxation, i.e. Changes in length and width in the area of the separation points prevented.
  • a stationary embossing device is preferably used for embossing the surface pattern in strand sections brought to a standstill. This simplifies the device and ensures a clean and identical impression of the negative pattern.
  • the support plate and the stop also serve to ensure a clean and identical impression of the negative pattern.
  • the device according to the invention comprises an extruder 1, a transport device 2 with a cross conveyor 3, a separating device 4, a stationary embossing device 5 and a cutting device 6.
  • the extruder 1 is designed in a known manner and is used to extrude a strand of raw material 7.
  • the transport device 2 and the cross conveyor 3 are provided for supporting and transporting the raw material strand 7 from the extruder 1 beyond the cutting device 6.
  • the transport device 2 consists of three transport lines 8, 9, 10 running in the strand or extrusion direction.
  • the transport routes 8 and 9 each include a conveyor belt 11 which is supported by support rollers and driven by drive rollers.
  • the transport path 10 comprises five conveyor belts which are arranged at a mutual spacing and are supported and driven in the manner described above, which are also designated by the reference number 11.
  • the separating device 4 is arranged between the transport lines 8 and 9 and serves to separate the raw material strand 7 into individual strand sections 12.
  • the separating device 4 is equipped in a known manner with a cutting wire.
  • the cross conveyor 3 is for taking over the individual strand sections 12 from the third transport path 10 and for transporting them transversely to the extrusion direction through the embossing device 5 and the cutting device 6 intended.
  • the cross conveyor 3 comprises a first cross conveyor section 13 and a second cross conveyor section 14.
  • the first section 13 consists of four individual driven conveyor belts 15 which, starting from the spaces between the individual conveyor belts 11 of the third transport section 10, extend to the embossing device 5 and somewhat above extend out.
  • the number of conveyor belts 16 used in the second transverse conveyor section 14 is equal to the number of blanks 17 to be cut in the cutting device 6 by means of a known wire harp from the respective strand section 12 - sixteen conveyor belts and sixteen blanks in the present exemplary embodiment, so that each conveyor belt 16 is a blank 17 transported away by the cutting device 6.
  • the embossing device 5 consists of an embossing die 18 and a support plate 19 arranged underneath for the individual strand sections 12.
  • the embossing die 18 comprises a pressure plate 20 and an embossing plate 21, which is interchangeably fastened to it, with a negative pattern incorporated therein (not shown) for embossing a corresponding surface pattern 22a, 22b into the upper strand surface 23 of the respective strand section 12.
  • the pressure plate 20 is guided by means of lifting rods 24 in a mounting block 25 fastened to a frame of the device, not shown, and via these lifting rods 24 from an upper position shown in FIG. 2 to an illustrated in FIG lower pressure position and movable back.
  • a stop 27 for fixing the strand section 12 respectively resting on the support plate 19 in the same, as the embossing position designated position attached below the die 18.
  • the support plate 19 and the stop 27 are provided with transverse grooves through which the four conveyor belts 15 run, supported by support blocks 28.
  • the support plate 19 with the stop 27 is supported on the frame via a lifting arrangement 31 and can be moved from a lower position below the transport surface 29 of the four conveyor belts 15 into a middle position and then into an upper position and back. In the middle position, the stop 27 projects beyond the transport surface 29 to determine the embossing position.
  • the support surface 30 of the support plate 19 located below the transport surface 29 is arranged in the upper position in the plane of the transport surface 29, so that the support plate 19 together with the four conveyor belts 15 forms a flat surface which supports the respective strand section 12 during the embossing process.
  • the function of the device according to the invention is as follows: By means of the extruder 1 fed with raw material, the raw material strand 7 is extruded, taken over by the first transport path 8 and transported in the strand direction to the separating device 4. In the latter, the raw material strand 7 is separated in a known manner into individual strand sections 12 by means of the cutting wire, which are then taken over by the second transport path 9 and are likewise transported in the strand direction until they are completely transferred to the third transport path 10. Each individual strand section 12 is then taken over by the conveyor belts 15 in a known manner and transported transversely to the strand direction or to the previous transport direction into the opened embossing device 5 with the stamp 18 located in the upper position.
  • the first phase is the Support plate 19 together with the stop 27 in the lower position, so that the preceding strand section 12, already provided with a surface pattern 22a, 22b - on the right in FIG. 2 - can be transported by means of the conveyor belts 15 over the stop 27 onto the conveyor belts 16.
  • the preceding, already embossed strand section 12 has left the support plate 19, the latter is raised into the middle position, not shown, so that the stop 27 projects into the transport path of the incoming strand section 12 - on the left in FIG. 2 - and the strand section 12 by means of the Conveyor belts 15 can be transported to the stop 27 with its front long side.
  • the support plate 19 is raised together with the stop 27 to the upper position and the die 18 is lowered until it reaches its lower position and thereby Has pressed negative patterns into the upper strand surface 23 and in this way has embossed the corresponding surface pattern 22a, 22b.
  • the stamping die 18 is then raised until the upper position is reached and the support plate 19 is lowered into the lower position together with the stop 27, whereupon the stamped strand section 12 is removed from the stamping device 5, as already described.
  • the strand section 12 is held immovably and exactly in the embossing position by the support plate 19 and by the stop 27; at the same time the die 18 is moved exactly perpendicular to the upper strand surface 23 by means of the lifting rods 24. In this way, movements of the negative pattern in its respective plane, ie parallel to the upper strand surface 23, are avoided and thus it is ensured that the embossed surface pattern 22a, 22b corresponds exactly to the negative pattern.
  • the strand section 12 embossed in this way is now transported to the cutting device 6 by means of the conveyor belts 16 and is cut there in a known manner along grooves 32 into blanks 17 by means of the wire harp with cutting wires located in the areas between the conveyor belts 16, which are then cut by means of the conveyor belts 16 be transported away.
  • the grooves 32 have an essentially triangular cross section and are embossed into the upper strand surface 23 together with the surface pattern by means of the correspondingly designed negative pattern. As shown in FIG. 1, the end regions 33 of the individual strand sections 12 are not provided with the surface pattern and, after being cut off, are returned to the extruder 1 by the cutting device 6.
  • the grooves 32 are not shown in order to clarify that this strand section is still in one piece and is only cut into blanks 17 in the cutting device 6. Although these blanks apparently still have the shape of a strand section 12 after leaving the cutting device 6, they should not be confused with them.
  • the lines drawn to differentiate the individual blanks 17 are also not embossed in the upper strand surface 23 Grooves 32 - only shown in Figure 2 - to be confused.
  • the blank 17 shown in FIG. 4 is provided on its upper side with the surface pattern 22a indicated in FIG. 1, consisting of diagonally running and intersecting grooves 34. These grooves 34 end at an uninterrupted circumferential edge 35 of the blank 17 and in this way form a surface pattern limited to one blank each.
  • the upper longitudinal edges of the blank are chamfered with chamfers 36, which have emerged from the grooves 32 in the upper strand surface 23 of the strand section 12.
  • the surface pattern 22b indicated in FIG. 2 is shown in an enlarged representation on the blank 17 according to FIG.
  • the top of this blank is divided into three fields by three mutually parallel grooves 37 running parallel to the blank edges, in which grooves 37 running parallel to the blank edges are arranged in such a way that they form angles in the corner fields and in the intermediate fields U - Form arrangements. All of the grooves 37 open out freely at the blank edges or the bevels 36, so that they form a surface pattern that can be supplemented and combined into an overall pattern.

Description

Die Erfindung betrifft eine Vorrichtung gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device according to the preamble of patent claim 1.

Eine solche Vorrichtung ist in der DE-C-33 06 852 beschrieben. Diese bekannte Vorrichtung ist dazu eingerichtet, an den Strangabschnitten eine umlaufende Kerbung anzubringen. Hierzu dienen drei Kerbleisten, nämlich eine erste vertikale Kerbleiste, die an einem Querschieber angeordnet ist, der die Strangabschnitte von einer ersten, die Strangabschnitte in Stranglängsrichtung anfördernden Transportstrecke quer auf einen Querbandförderer schiebt, einer zweiten, winkelförmigen Kerbleiste, die über dem Querbandförderer so vertikal verschiebbar gelagert ist, daß ihr horizontaler Kerbschenkel gegen die Oberseite des jeweiligen Strangabschnitts schiebbar ist, wobei ihr vertikaler Kerbschenkel sich vom in Querrichtung vorderen Ende des horizontalen Kerbschenkels nach unten erstreckt und einen Anschlag für den mit dem Querschieber vorgeschobenen Strangabschnitt bildet, und einer dritten Kerbleiste, die unter dem oberen Trum des Querbandförderers angeordnet ist und vertikal verschiebbar gelagert ist. Zum Anbringen einer umlaufenden Kerbe wird der jeweilige Strangabschnitt mit dem Querschieber von der ersten Transportstrecke auf den neben letzterer angeordneten Querbandförderer geschoben und dabei gegen den einen Anschlag bildenden vertikalen Kerbschenkel gedrückt, wobei vertikale Kerben an den einander gegenüberliegenden Seitenwänden des Strangabschnitts mittels am Querschieber und am vertikalen Kerbschenkel angeordneten Kerbrippen eingekerbt werden. Danach werden die zweite Kerbleiste gegen den Strangabschnitt abgesenkt und die dritte Kerbleiste gegen den Strangabschnitt hochgeschoben, wobei mittels den daran angebrachten Kerbrippen die Kerbung oberseitig und unterseitig am Stangabschnitt vervollständigt wird. Nach dem Kerben wird die zweite Kerbleiste soweit hochbewegt, daß ihr vertikaler Kerbschenkel den Strangabschnitt freigibt und dieser mit dem Querbandförderer weitertransportiert werden kann.Such a device is described in DE-C-33 06 852. This known device is set up to make a circumferential notch on the strand sections. Three notch bars are used for this purpose, namely a first vertical notch bar, which is arranged on a cross slide, which pushes the strand sections transversely onto a cross belt conveyor from a first transport section that conveys the strand sections in the longitudinal direction of the strand, and a second, angular notch bar that can be displaced vertically above the cross belt conveyor is mounted that its horizontal notch leg is slidable against the top of the respective strand section, wherein its vertical notch leg extends downward from the transverse front end of the horizontal notch leg and forms a stop for the strand section advanced with the cross slide, and a third notch bar, which is arranged under the upper run of the cross belt conveyor and is vertically displaceably mounted. To make a circumferential notch, the respective strand section with the cross slide is pushed from the first transport section onto the cross belt conveyor arranged next to the latter and pressed against the vertical notch leg forming a stop, vertical notches on the opposite side walls of the strand section by means of the cross slide and the vertical one Notch legs arranged notch ribs are notched. Thereafter, the second notch bar is lowered against the strand section and the third notch bar is pushed up against the strand section, the notch being attached to the top and bottom of the bar section by means of the notch ribs attached to it. After the notching, the second notch bar is moved up so far that its vertical notch leg releases the strand section and this can be transported further with the cross belt conveyor.

In der Praxis ist es bekannt, mittels einer druckbeaufschlagten, auf dem Rohmaterialstrang abrollenden Prägerolle, deren Umfangsfläche mit dem Negativmuster versehen ist, das entsprechende Oberflächenmuster in die obere Strangfläche einzuprägen. Jedoch verhindert der relativ geringe Durchmesser der Prägerolle einen gleichmäßigen Eindruck des Oberflächenmusters. Ein weiterer Nachteil der Prägerollen besteht darin, daß komplizierte Oberflächenmuster, insbesondere solche mit schräg oder quer zur Transportrichtung des Rohmaterialstranges verlaufenden Vertiefungen, nicht fehlerfrei eingeprägt werden können, da sehr häufig ein beispielsweise durch schwankende Konsistenz des Rohmaterials verursachter Versatz zwischen dem Negativmuster auf der Prägerolle und dessen Abdruck auf der Strangfläche auftritt. Ein solcher Versatz beeinträchtigt sowohl die Qualität von Oberflächenmustern, die in sich geschlossen, je einem Rohling zugeordnet sind, als auch die von Oberflächenmustern, die über mehrere Rohlinge verteilt, durch Zusammenfügen ein Gesamtmuster ergeben sollen. Bei auftretendem Versatz können die erstgenannten Oberflächenmuster können in unterschiedlicher Weise auf zwei Rohlingen angeordnet sein, während bei den letztgenannten Oberflächenmustern das Zusammenfügen der entsprechenden Rohlinge nicht das vorgesehene Gesamtmuster ergibt.In practice it is known to emboss the corresponding surface pattern in the upper strand surface by means of a pressurized embossing roller rolling on the raw material strand, the peripheral surface of which is provided with the negative pattern. However, the relatively small diameter of the embossing roller prevents a uniform impression of the surface pattern. Another disadvantage of the embossing rollers is that complicated surface patterns, particularly those with depressions that run obliquely or transversely to the direction of transport of the raw material strand, cannot be impressed without errors, since very often an offset between the negative pattern on the embossing roller and caused, for example, by fluctuating consistency of the raw material whose impression occurs on the strand surface. Such an offset affects both the quality of surface patterns which are self-contained, each associated with a blank, and that of surface patterns which are distributed over a plurality of blanks, are said to result in an overall pattern by joining them together. In the event of an offset, the first-mentioned surface patterns can be arranged on two blanks in different ways, while in the last-mentioned surface patterns the joining together of the corresponding blanks does not match the overall pattern provided results.

Aus diesem Grunde werden mit der Prägerolle nur einfache Oberflächenmuster eingeprägt, die im wesentlichen in Transportrichtung des Rohmaterialstranges verlaufende Vertiefungen aufweisen, die zusätzlich von Vertiefungen gekreuzt werden können, die mittels einer zweiten Prägerolle in den auf Länge geschnittenen und quer zur bisherigen Strangrichtung transportierten Rohmaterialstrang eingeprägt wurden.For this reason, only simple surface patterns are embossed with the embossing roller, which have depressions that run essentially in the transport direction of the raw material strand, which can additionally be crossed by depressions that were embossed by means of a second embossing roller in the raw material strand cut to length and transported transversely to the previous strand direction .

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs angegebenen Art so auszugestalten, daß die Strangabschnitte mit einem Oberflächenmuster geprägt werden können.The invention has for its object to design a device of the type mentioned above so that the strand sections can be embossed with a surface pattern.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Da erfindungsgemäß das Negativmuster statt an einer Prägerolle an einem Prägestempel ausgebildet ist, kann es durch entsprechende Führung des Prägestempels oder des Rohmaterialstranges zumindest während des eigentlichen Einprägens, wenn es sich im Eingriff mit der Strangfläche befindet und in Relativbewegung in diese hineingedrückt bzw. aus dieser herausgezogen wird, in seiner Ebene relativ zur Strangfläche unbeweglich gehalten werden. Mit anderen Worten, das Negativmuster führt während des eigentlichen Einprägens lediglich die dazu erforderlichen Relativbewegungen gegenüber der Strangfläche senkrecht zu dieser aus. Querbewegungen des Negativmusters relativ zur Strangfläche sind während des eigentlichen Einprägens ausgeschlossen. Die Erfindung ermöglicht es, auf diese Weise auch komplizierte Oberflächenmuster jeglicher Konfiguration sauber und in völliger Übereinstimmung mit dem Negativmustr einzuprägen. Versatz und unterschiedliche Eindrucktiefen treten nicht auf. Der Rohmaterialstrang kann an den vorgesehenen Stellen in Rohlinge zerschnitten werden, ohne das in sich geschlossene, je einem Rohling zugeordnete Oberflächenmuster unterbrochen werden bzw. die Herstellung eines aus Oberflächenmustern mehrerer Rohlinge zusammengefügten Gesamtmusters beeinträchtigt wird.Since, according to the invention, the negative pattern is formed on an embossing die instead of on an embossing roll, it can be guided by appropriate guidance of the embossing die or of the raw material strand, at least during the actual embossing, when it is in engagement with the strand surface and pressed into or pulled out of it in a relative movement will be held immobile in its plane relative to the strand surface. In other words, the negative pattern only performs the necessary relative movements relative to the strand surface perpendicular to it during the actual stamping. Cross movements of the negative pattern relative to the strand surface are excluded during the actual memorization. The invention makes it possible in this way to impress even complex surface patterns of any configuration cleanly and in full accordance with the negative pattern. Offset and different impression depths do not occur. The raw material strand can be cut into blanks at the intended locations without the self-contained surface pattern, which is assigned to a blank, being interrupted or the production of an overall pattern composed of surface patterns of several blanks being impaired.

Bei der erfindungsgemäßen Vorrichtung ist der Prägestempel ein oberer Prägestempel, mit dem das Oberflächenmuster in die obere Strangfläche eingeprägt wird. Zusätzlich kann das Oberflächenmuster auch in die untere Strangfläche oder in seitliche Strangflächen mit entsprechend angeordnetem Prägestempel und entsprechenden Abstützungen eingeprägt werden.In the device according to the invention, the stamp is an upper stamp with which the surface pattern is stamped into the upper strand surface. In addition, the surface pattern can also be embossed in the lower strand surface or in lateral strand surfaces with a correspondingly arranged embossing stamp and corresponding supports.

Außerdem erfolgt das Einprägen des Oberflächenmusters in vom Rohmaterialstrang abgetrennte Strangabschnitte. Dadurch werden Verzerrungen des Oberflächenmusters durch möglicherweise auftretendes Entspannen, d.h. Längen- und Breitenänderungen im Bereich der Trennstellen, verhindert.In addition, the surface pattern is embossed into strand sections separated from the raw material strand. This eliminates surface pattern distortions caused by stress relaxation, i.e. Changes in length and width in the area of the separation points prevented.

Obwohl das Einprägen des Oberflächenmusters mit einem sich mit der Geschwindigkeit des extrudierten Rohmaterialstranges bewegenden Prägestempels möglich ist, wird vorzugsweise eine stationär ausgebildete Prägeeinrichtung zum Einprägen des Oberflächenmusters in zum Stillstand gebrachte Strangabschnitte verwendet. Hierdurch werden die Vorrichtung vereinfacht und ein sauberer und identischer Abdruck des Negativmusters sichergestellt.Although the surface pattern is imprinted with the speed of the extruded raw material strand moving embossing stamp is possible, a stationary embossing device is preferably used for embossing the surface pattern in strand sections brought to a standstill. This simplifies the device and ensures a clean and identical impression of the negative pattern.

Ebenfalls zur Gewährleistung eines sauberen und identischen Abdrucks des Negativmusters dienen die Stützplatte und der Anschlag.The support plate and the stop also serve to ensure a clean and identical impression of the negative pattern.

Der Gewährleistung einer möglichst exakt festgelegten Prägeposition des jeweils in der Prägeeinrichtung befindlichen Strangabschnitts die mit die Zuordnung des Anschlags der Längsseite des Strangabschnitts.Ensuring that the embossing position of the strand section located in the embossing device is determined as precisely as possible and that the assignment of the stop to the longitudinal side of the strand section.

Im Vergleich zu einem zwecks Einprägen des Oberflächenmusters gegenüber dem Prägestempel bewegbaren Rohmaterialstrang läßt sich mit den Merkmalen der Unteransprüche eine vereinfachte Konstruktion der Vorrichtung erzielen.In comparison to a raw material strand which can be moved relative to the embossing die for the purpose of embossing the surface pattern, a simplified construction of the device can be achieved with the features of the subclaims.

Nachstehend ist die Erfindung anhand eines bevorzugten Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher beschrieben. Es zeigen:

Figur 1
eine Draufsicht der erfindungsgemäßen Vorrichtung in schematischer Darstellung,
Figur 2
eine perspektivische Darstellung der Prägeeinrichtung in Offenstellung,
Figur 3
die Prägeeinrichtung nach Figur 2, jedoch in Schließ- oder Prägestellung,
Figur 4
eine perspektivische Darstellung eines mit einem ersten Oberflächenmuster versehenen Rohlings, und
Figur 5
eine perspektivische Darstellung eines mit einem zweiten Oberflächenmuster versehenen Rohlings.
The invention is described in more detail below on the basis of a preferred exemplary embodiment with reference to the drawing. Show it:
Figure 1
2 shows a plan view of the device according to the invention in a schematic illustration,
Figure 2
2 shows a perspective illustration of the embossing device in the open position,
Figure 3
2, but in the closed or embossed position,
Figure 4
a perspective view of a blank provided with a first surface pattern, and
Figure 5
a perspective view of a blank provided with a second surface pattern.

Gemäß dem in Figur 1 dargestellten Ausführungsbeispiel umfaßt die erfindungsgemäße Vorrichtung einen Extruder 1, eine Transporteinrichtung 2 mit einem Querförderer 3, eine Trenneinrichtung 4, eine stationäre Prägeeinrichtung 5 und eine Schneideinrichtung 6.According to the exemplary embodiment shown in FIG. 1, the device according to the invention comprises an extruder 1, a transport device 2 with a cross conveyor 3, a separating device 4, a stationary embossing device 5 and a cutting device 6.

Der Extruder 1 ist in bekannter Weise ausgebildet und dient zum Extrudieren eines Rohmaterialstranges 7.The extruder 1 is designed in a known manner and is used to extrude a strand of raw material 7.

Die Transporteinrichtung 2 und der Querförderer 3 sind zur Abstützung und zum Transport des Rohmaterialstranges 7 vom Extruder 1 jenseits der Schneideinrichtung 6 vorgesehen. Die Transporteinrichtung 2 besteht aus drei in Strang- bzw. Extrudierrichtung verlaufenden Transportstrecken 8,9,10. Die Transportstrecken 8 und 9 umfassen je ein Transportband 11, das von Stützrollen abgestützt und von Antriebsrollen angetrieben ist. Die Transportstrecke 10 umfaßt fünf, mit gegenseitigem Abstand angeordnete und in vorbeschriebener Weise abgestützte sowie angetriebene Transportbänder, die ebenfalls mit dem Bezugszeichen 11 bezeichnet sind.The transport device 2 and the cross conveyor 3 are provided for supporting and transporting the raw material strand 7 from the extruder 1 beyond the cutting device 6. The transport device 2 consists of three transport lines 8, 9, 10 running in the strand or extrusion direction. The transport routes 8 and 9 each include a conveyor belt 11 which is supported by support rollers and driven by drive rollers. The transport path 10 comprises five conveyor belts which are arranged at a mutual spacing and are supported and driven in the manner described above, which are also designated by the reference number 11.

Die Trenneinrichtung 4 ist zwischen den Transportstrecken 8 und 9 angeordnet und dient zum Trennen des Rohmaterialstranges 7 in einzelne Strangabschnitte 12. Zu diesem Zwecke ist die Trenneinrichtung 4 in bekannter Weise mit einem Schneiddraht ausgerüstet.The separating device 4 is arranged between the transport lines 8 and 9 and serves to separate the raw material strand 7 into individual strand sections 12. For this purpose, the separating device 4 is equipped in a known manner with a cutting wire.

Der Querförderer 3 ist zur Übernahme der einzelnen Strangabschnitte 12 von der dritten Transportstrecke 10 und zu ihrem Transport quer zur Extrudierrichtung durch die Prägeeinrichtung 5 und die Schneideinrichtung 6 vorgesehen. Zu diesem Zweck umfaßt der Querförderer 3 einen ersten Querförderabschnitt 13 und einen zweiten Querförderabschnitt 14. Ersterer Abschnitt 13 besteht aus vier einzelnen angetriebenen Förderbändern 15, die ausgehend von den Zwischenräumen zwischen den einzelnen Transportbändern 11 der dritten Transportstrecke 10 sich bis zur Prägeeinrichtung 5 und etwas darüber hinaus erstrecken. Die Zahl der im zweiten Querförderabschnitt 14 verwendeten Förderbänder 16 ist gleich der Anzahl der in der Schneideinrichtung 6 mittels einer bekannten Drahtharfe aus dem jeweiligen Strangabschnitt 12 zu schneidenden Rohlingen 17 - im vorliegenden Ausführungsbeispiel sechzehn Förderbänder und sechzehn Rohlinge -, so daß jedes Förderband 16 einen Rohling 17 von der Schneideinrichtung 6 abtransportiert.The cross conveyor 3 is for taking over the individual strand sections 12 from the third transport path 10 and for transporting them transversely to the extrusion direction through the embossing device 5 and the cutting device 6 intended. For this purpose, the cross conveyor 3 comprises a first cross conveyor section 13 and a second cross conveyor section 14. The first section 13 consists of four individual driven conveyor belts 15 which, starting from the spaces between the individual conveyor belts 11 of the third transport section 10, extend to the embossing device 5 and somewhat above extend out. The number of conveyor belts 16 used in the second transverse conveyor section 14 is equal to the number of blanks 17 to be cut in the cutting device 6 by means of a known wire harp from the respective strand section 12 - sixteen conveyor belts and sixteen blanks in the present exemplary embodiment, so that each conveyor belt 16 is a blank 17 transported away by the cutting device 6.

Die Prägeeinrichtung 5 besteht aus einem Prägestempel 18 und einer darunter angeordneten Stützplatte 19 für die einzelnen Strangabschnitte 12. Der Prägestempel 18 umfaßt eine Druckplatte 20 und eine an dieser auswechselbar befestigte Prägeplatte 21 mit darin eingearbeitetem Negativmuster - nicht gezeigt - zum Einprägen eines entsprechenden Oberfächenmusters 22a, 22b in die obere Strangfläche 23 des jeweiligen Strangabschnitts 12. Die Druckplatte 20 ist mittels Hubstangen 24 in einem an einem nicht gezeigten Rahmen der Vorrichtung befestigten Halterungsblock 25 geführt und über diese Hubstangen 24 von einer in Figur 2 gezeigten oberen Stellung in eine in Figur 3 dargestellte untere Druckstellung und zurück bewegbar.The embossing device 5 consists of an embossing die 18 and a support plate 19 arranged underneath for the individual strand sections 12. The embossing die 18 comprises a pressure plate 20 and an embossing plate 21, which is interchangeably fastened to it, with a negative pattern incorporated therein (not shown) for embossing a corresponding surface pattern 22a, 22b into the upper strand surface 23 of the respective strand section 12. The pressure plate 20 is guided by means of lifting rods 24 in a mounting block 25 fastened to a frame of the device, not shown, and via these lifting rods 24 from an upper position shown in FIG. 2 to an illustrated in FIG lower pressure position and movable back.

An der der Schneideinrichtung 6 zugewandten Längsseite der Stützplatte 19 ist ein Anschlag 27 zum Festlegen des jeweils auf der Stützplatte 19 ruhenden Strangabschnittes 12 in jeweils gleicher, als Prägeposition bezeichneten Position unterhalb des Prägestempels 18 befestigt. Die Stützplatte 19 und der Anschlag 27 sind mit Quernuten versehen, durch die die vier Förderbänder 15, abgestützt von Stützblöcken 28 hindurchlaufen. Die Stützplatte 19 mit dem Anschlag 27 ist über eine Hubanordnung 31 am Rahmen abgestützt und von einer unteren Stellung unterhalb der Transportfläche 29 der vier Förderbänder 15 in eine mittlere und sodann in eine obere Stellung und zurück bewegbar. In der mittleren Stellung steht der Anschlag 27 über die Transportfläche 29 zur Festlegung der Prägeposition über. Die dabei unterhalb der Transportfläche 29 befindliche Stützfläche 30 der Stützplatte 19 ist in der oberen Stellung in der Ebene der Transportfläche 29 angeordnet, so daß die Stützplatte 19 zusammen mit den vier Förderbändern 15 eine ebene, den jeweiligen Strangabschnitt 12 während des Prägevorganges abstützende Fläche bildet.On the longitudinal side of the support plate 19 facing the cutting device 6 there is a stop 27 for fixing the strand section 12 respectively resting on the support plate 19 in the same, as the embossing position designated position attached below the die 18. The support plate 19 and the stop 27 are provided with transverse grooves through which the four conveyor belts 15 run, supported by support blocks 28. The support plate 19 with the stop 27 is supported on the frame via a lifting arrangement 31 and can be moved from a lower position below the transport surface 29 of the four conveyor belts 15 into a middle position and then into an upper position and back. In the middle position, the stop 27 projects beyond the transport surface 29 to determine the embossing position. The support surface 30 of the support plate 19 located below the transport surface 29 is arranged in the upper position in the plane of the transport surface 29, so that the support plate 19 together with the four conveyor belts 15 forms a flat surface which supports the respective strand section 12 during the embossing process.

Die Funktion der erfindungsgemäßen Vorrichtung ist wie folgt:
Mittels des mit Rohmaterial gefütterten Extruders 1 wird der Rohmaterialstrang 7 extrudiert, von der ersten Transportstrecke 8 übernommen und in Strangrichtung bis zur Trenneinrichtung 4 transportiert. In letzterer wird der Rohmaterialstrang 7 mittels des Schneiddrahtes in bekannter Weise in einzelne Strangabschnitte 12 getrennt, die dann von der zweiten Transportstrecke 9 übernommen und ebenfalls in Strangrichtung bis zur vollständigen Übergabe auf die dritte Transportstrecke 10 weitertransportiert werden. Sodann wird jeder einzelne Strangabschnitt 12 von den Förderbändern 15 in bekannter Weise übernommen und quer zur Strangrichtung bzw. zur bisherigen Transportrichtung in die geöffnete Prägeeinrichtung 5 mit in oberer Stellung befindlichem Prägestempel 18 hineintransportiert. Dabei befindet sich in einer ersten Phase die Stützplatte 19 zusammen mit dem Anschlag 27 in der unteren Stellung, so daß der vorhergehende, bereits mit einem Oberflächenmuster 22a, 22b versehene Strangabschnitt 12 - rechts in Figur 2 - mittels der Förderbänder 15 über den Anschlag 27 hinweg auf die Förderbänder 16 transportiert werden kann. Sobald der vorhergehende, bereits geprägte Strangabschnitt 12 die Stützplatte 19 verlassen hat, wird letztere in die mittlere, nicht gezeigte Stellung angehoben, so daß der Anschlag 27 in die Transportbahn des ankommenden Strangabschnitts 12 - links in Figur 2 - hineinragt und der Strangabschnitt 12 mittels der Förderbänder 15 bis zur Anlage mit seiner vorderen Längsseite an den Anschlag 27 transportiert werden kann.The function of the device according to the invention is as follows:
By means of the extruder 1 fed with raw material, the raw material strand 7 is extruded, taken over by the first transport path 8 and transported in the strand direction to the separating device 4. In the latter, the raw material strand 7 is separated in a known manner into individual strand sections 12 by means of the cutting wire, which are then taken over by the second transport path 9 and are likewise transported in the strand direction until they are completely transferred to the third transport path 10. Each individual strand section 12 is then taken over by the conveyor belts 15 in a known manner and transported transversely to the strand direction or to the previous transport direction into the opened embossing device 5 with the stamp 18 located in the upper position. The first phase is the Support plate 19 together with the stop 27 in the lower position, so that the preceding strand section 12, already provided with a surface pattern 22a, 22b - on the right in FIG. 2 - can be transported by means of the conveyor belts 15 over the stop 27 onto the conveyor belts 16. As soon as the preceding, already embossed strand section 12 has left the support plate 19, the latter is raised into the middle position, not shown, so that the stop 27 projects into the transport path of the incoming strand section 12 - on the left in FIG. 2 - and the strand section 12 by means of the Conveyor belts 15 can be transported to the stop 27 with its front long side.

Sobald der Strangabschnitt 12 über seine Gesamtlänge am Anschlag 27 anliegt und somit in seiner Prägeposition festgelegt ist, wird die Stützplatte 19 zusammen mit dem Anschlag 27 bis in die obere Stellung angehoben und der Prägestempel 18 soweit abgesenkt, bis er seine untere Stellung erreicht und dabei das Negativmuster in die obere Strangfläche 23 eingedrückt und auf diese Weise das entsprechende Oberflächenmuster 22a, 22b eingeprägt hat. Anschließend wird der Prägestempel 18 bis zum Erreichen der oberen Stellung angehoben und die Stützplatte 19 zusammen mit dem Anschlag 27 in die untere Stellung abgesenkt, woraufhin der geprägte Strangabschnitt 12, wie bereits beschrieben, aus der Prägeeinrichtung 5 entfernt wird.As soon as the strand section 12 abuts the stop 27 over its entire length and is thus fixed in its embossing position, the support plate 19 is raised together with the stop 27 to the upper position and the die 18 is lowered until it reaches its lower position and thereby Has pressed negative patterns into the upper strand surface 23 and in this way has embossed the corresponding surface pattern 22a, 22b. The stamping die 18 is then raised until the upper position is reached and the support plate 19 is lowered into the lower position together with the stop 27, whereupon the stamped strand section 12 is removed from the stamping device 5, as already described.

Zumindest während des eigentlichen Einprägens, wenn sich das Negativmuster im Eingriff mit der oberen Strangfläche 23 befindet, wird der Strangabschnitt 12 durch die Stützplatte 19 und durch den Anschlag 27 unbeweglich und exakt in der Prägeposition gehalten; gleichzeitig wird der Prägestempel 18 mittels der Hubstangen 24 genau senkrecht zur oberen Strangfläche 23 bewegt. Auf diese Weise werden Bewegungen des Negativmusters in seiner jeweiligen Ebene, d.h. parallel zur oberen Strangfläche 23 vermieden und somit sichergestellt, daß das eingeprägte Oberflächenmuster 22a, 22b genau dem Negativmuster entspricht.At least during the actual embossing, when the negative pattern is in engagement with the upper strand surface 23, the strand section 12 is held immovably and exactly in the embossing position by the support plate 19 and by the stop 27; at the same time the die 18 is moved exactly perpendicular to the upper strand surface 23 by means of the lifting rods 24. In this way, movements of the negative pattern in its respective plane, ie parallel to the upper strand surface 23, are avoided and thus it is ensured that the embossed surface pattern 22a, 22b corresponds exactly to the negative pattern.

Der auf diese Weise geprägte Strangabschnitt 12 wird nun mittels der Förderbänder 16 zur Schneideinrichtung 6 transportiert und dort mittels der Drahtharfe mit in den Bereichen zwischen den Förderbändern 16 befindlichen Schneiddrähten in bekannter Weise entlang von Nuten 32 in Rohlinge 17 zerschnitten, die dann mittels der Förderbänder 16 abtransportiert werden. Die Nuten 32 weisen einen im wesentlichen dreieckigen Querschnitt auf und sind mittels des entsprechend ausgebildeten Negativmusters zusammen mit dem Oberflächenmuster in die obere Strangfläche 23 eingeprägt. Wie in Figur 1 gezeigt, werden die Stirnendbereiche 33 der einzelnen Strangabschnitte 12 nicht mit dem Oberflächenmuster versehen und nach Abschneiden durch die Schneideinrichtung 6 zum Extruder 1 rückgeführt.The strand section 12 embossed in this way is now transported to the cutting device 6 by means of the conveyor belts 16 and is cut there in a known manner along grooves 32 into blanks 17 by means of the wire harp with cutting wires located in the areas between the conveyor belts 16, which are then cut by means of the conveyor belts 16 be transported away. The grooves 32 have an essentially triangular cross section and are embossed into the upper strand surface 23 together with the surface pattern by means of the correspondingly designed negative pattern. As shown in FIG. 1, the end regions 33 of the individual strand sections 12 are not provided with the surface pattern and, after being cut off, are returned to the extruder 1 by the cutting device 6.

In dem in Figur 1 zwischen der Prägeeinrichtung 5 und der Schneideinrichtung 6 dargestellten Strangabschnitt 12 sind die Nuten 32 nicht eingezeichnet, um zu verdeutlichen, daß dieser Strangabschnitt noch in einem Stück vorliegt und erst in der Schneideinrichtung 6 in Rohlinge 17 zerschnitten wird. Obwohl diese Rohlinge nach Verlassen der Schneideinrichtung 6 augenscheinlich noch die Form eines Strangabschnitts 12 aufweisen, sind sie nicht mit diesen zu verwechseln. Auch die zur Unterscheidung der einzelnen Rohlinge 17 eingezeichneten Linien sind nicht mit den in die obere Strangfläche 23 eingeprägten Nuten 32 - lediglich in Figur 2 gezeigt - zu verwechseln.In the strand section 12 shown in FIG. 1 between the embossing device 5 and the cutting device 6, the grooves 32 are not shown in order to clarify that this strand section is still in one piece and is only cut into blanks 17 in the cutting device 6. Although these blanks apparently still have the shape of a strand section 12 after leaving the cutting device 6, they should not be confused with them. The lines drawn to differentiate the individual blanks 17 are also not embossed in the upper strand surface 23 Grooves 32 - only shown in Figure 2 - to be confused.

Der in Figur 4 dargestellte Rohling 17 ist auf seiner Oberseite mit dem in Figur 1 angedeuteten Oberflächenmuster 22a bestehend aus diagonal verlaufenden und einander kreuzenden Rillen 34 versehen. Diese Rillen 34 enden an einem ununterbrochen umlaufenden Rand 35 des Rohlings 17 und bilden auf diese Weise ein auf je einen Rohling beschränktes Oberflächenmuster. Die oberen Längskanten des Rohlings sind mit Fasen 36 angefast, die aus den Nuten 32 in der oberen Strangfläche 23 des Strangsabschnitts 12 hervorgegangen sind.The blank 17 shown in FIG. 4 is provided on its upper side with the surface pattern 22a indicated in FIG. 1, consisting of diagonally running and intersecting grooves 34. These grooves 34 end at an uninterrupted circumferential edge 35 of the blank 17 and in this way form a surface pattern limited to one blank each. The upper longitudinal edges of the blank are chamfered with chamfers 36, which have emerged from the grooves 32 in the upper strand surface 23 of the strand section 12.

Das in Figur 2 angedeutete Oberflächenmuster 22b ist in vergrößerter Darstellung am Rohling 17 nach Figur 5 gezeigt. Die Oberseite dieses Rohlings ist durch drei parallel zu den Rohlingskanten verlaufenden, einander kreuzenden Rillen 37 in sechs Felder aufgeteilt, in denen wiederum parallel zu den Rohlingskanten verlaufende Rillen 37 so angebracht sind, daß sie in den Eckfeldern Winkel und in den dazwischen angeordneten mittleren Felder U-Anordnungen bilden. Sämtliche Rillen 37 münden frei an den Rohlingskanten bzw. den Fasen 36 aus, so daß sie ein ergänzungsfähiges, zu einem Gesamtmuster zusammensetzbares Oberflächenmuster bilden.The surface pattern 22b indicated in FIG. 2 is shown in an enlarged representation on the blank 17 according to FIG. The top of this blank is divided into three fields by three mutually parallel grooves 37 running parallel to the blank edges, in which grooves 37 running parallel to the blank edges are arranged in such a way that they form angles in the corner fields and in the intermediate fields U - Form arrangements. All of the grooves 37 open out freely at the blank edges or the bevels 36, so that they form a surface pattern that can be supplemented and combined into an overall pattern.

Claims (4)

  1. Apparatus for the manufacture of green bodies (17) for clinker bricks, bricks and the like, from sections (12) of a strand of green material, comprising a first transportation run (2,10,11) transporting the strand sections (12) in the longitudinal direction of the strand, a transverse conveyor (3,13), comprising parallel transportation belts, for receiving and further transporting the strand sections (12) transversely of the strand, a stop (27) for the strand sections (12), which stop can be brought into the transportation path of the transverse conveyor (3,13), a notching device (5) arranged above the transverse conveyor (3,13) and having notching ribs running transversely of the strand, which notching device can be brought down upon the strand sections (12) for making notch lines (36), when the strand sections abut against the stop (27), and a cutting device (6) arranged after the notching device (5) in the direction of transportation of the transverse conveyor (3,13), which cutting device cuts the strand sections (12) into the green bodies (17) at the notch lines (36),
    characterised in that,
    the notching device (5) is also a stamping device and for this purpose has a die plate (21) on the underside of which there is provided, along with the notching ribs running in a direction transverse to the strand, also a negative for the surface pattern (22a,22b) to be applied on the green bodies (17), in that there is arranged beneath the die plate (21) provided on the notching and stamping device (5) a support plate (19) with grooves, running transversely of the strand direction, for receiving the transportation belts (15) forming the transverse conveyor (3,13), and in that the support plate (19) is moveable from a lower position beneath the transportation surface (29) formed by the transportation belts (15) of the transverse conveyor (3,13) into an upper position in which its support surface (30) and the transportation surface (29) are arranged substantially in one plane, and is moveable back again.
  2. Apparatus according to claim 1,
    characterised in that,
    the stop (27) is located on the support plate (19).
  3. Apparatus according to claim 2,
    characterised in that,
    the support plate (19) is additionally moveable also into a middle position lying between the upper and lower positions, in which middle position the stop (27) already engages through and between the transportation belts (15) forming the transverse conveyor (3,13) and projects into the transportation path of the transverse conveyor (3,13).
  4. Apparatus according to claim 2 or 3,
    characterised in that,
    the stop (27) is formed as a strip extending over the width of the support plate (19) and is provided, similarly to the support plate (19); with grooves for receiving the transportation belts (15) forming the transverse conveyor (3,13).
EP90125774A 1990-01-16 1990-12-28 Apparatus for making blanks with pattern on the upper surface for bricks, tiles or the same Expired - Lifetime EP0437858B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4001071A DE4001071A1 (en) 1990-01-16 1990-01-16 METHOD AND DEVICE FOR PRODUCING SURFACES HAVING SURFACE PATTERNS FOR CLINKER STONES, BRICKS AND THE LIKE.
DE4001071 1990-01-16

Publications (3)

Publication Number Publication Date
EP0437858A2 EP0437858A2 (en) 1991-07-24
EP0437858A3 EP0437858A3 (en) 1991-11-13
EP0437858B1 true EP0437858B1 (en) 1994-09-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009017632A1 (en) 2009-04-16 2010-10-21 Hagemeister GmbH & Co. KG, Ziegelwerk Blank producing apparatus for e.g. clinker brick, has embossing device movable from drive with speed that is synchronous to speed of transport belt, where embossing plate is pressed on strand section during synchronized movement of device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501219B4 (en) * 1995-01-17 2005-12-01 Klinker- Und Ziegelwerk Franz Wenzel Gmbh & Co. Kg Method and device for producing a perforated brick, in particular a perforated brick, as well as perforated bricks produced therewith
EP2085248A1 (en) * 2008-02-04 2009-08-05 Stefano Rosi A process for producing a matrix for realising a tile
CN108943348A (en) * 2018-08-20 2018-12-07 佛山市赛普飞特机械有限公司 A kind of digital printing device using ceramic powder
CN114889082A (en) * 2022-04-27 2022-08-12 福建纳川管业科技有限责任公司 Automatic Krah pipe transfer device and use method thereof

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US2738825A (en) * 1954-05-03 1956-03-20 Internat Clay Machinery Of Del Apparatus for making a ceramic tile building panel
DE2705546A1 (en) * 1977-02-10 1978-08-17 Rhein Dinas Rheinische Chamott Rectangular or square floor or wall plates - are extruded edgeways and impressed with cut pattern for ready separation
GB1585277A (en) * 1977-09-16 1981-02-25 Redland Technology Ltd Production of construction blocks
DE3306852C1 (en) * 1983-02-26 1984-03-29 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co Kg, 7910 Neu-Ulm Device for indenting extruded clay pieces transversely to their longitudinal direction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009017632A1 (en) 2009-04-16 2010-10-21 Hagemeister GmbH & Co. KG, Ziegelwerk Blank producing apparatus for e.g. clinker brick, has embossing device movable from drive with speed that is synchronous to speed of transport belt, where embossing plate is pressed on strand section during synchronized movement of device
DE102009017632B4 (en) * 2009-04-16 2015-10-15 Hagemeister GmbH & Co. KG, Ziegelwerk Device and method for producing blanks for clinker bricks, bricks or the like.

Also Published As

Publication number Publication date
EP0437858A2 (en) 1991-07-24
EP0437858A3 (en) 1991-11-13
DE59007060D1 (en) 1994-10-13
DE4001071A1 (en) 1991-07-18

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