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EP2735413A1 - Extrusion die - Google Patents

Extrusion die Download PDF

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Publication number
EP2735413A1
EP2735413A1 EP12193557.1A EP12193557A EP2735413A1 EP 2735413 A1 EP2735413 A1 EP 2735413A1 EP 12193557 A EP12193557 A EP 12193557A EP 2735413 A1 EP2735413 A1 EP 2735413A1
Authority
EP
European Patent Office
Prior art keywords
mouthpiece
support rod
incorporated
holding
plate
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
Application number
EP12193557.1A
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German (de)
French (fr)
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EP2735413B1 (en
Inventor
Harald Berger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haendle Maschinen und Anlagenbau GmbH
Original Assignee
Ziegelmundstueckbau Braun GmbH
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Application filed by Ziegelmundstueckbau Braun GmbH filed Critical Ziegelmundstueckbau Braun GmbH
Priority to EP12193557.1A priority Critical patent/EP2735413B1/en
Publication of EP2735413A1 publication Critical patent/EP2735413A1/en
Application granted granted Critical
Publication of EP2735413B1 publication Critical patent/EP2735413B1/en
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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
    • B28B3/20—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein the material is extruded
    • B28B3/26—Extrusion dies

Definitions

  • the invention relates to a mouthpiece for producing a molded article from a ceramic mass in the extrusion process according to the preamble of claim 1.
  • the support rods at the free end, the cores are incorporated to form the honeycomb structure or cavities in the finished pressed molding, welded to the support plate.
  • a torsion-proof and permanent attachment of the respective support rod to the support plate is achieved by the weld, but disadvantageously, the support rods are not isolated from the support plate are removed if they are worn, for example.
  • the support rod and the retaining plate have to weigh up a pair of materials, which is suitable for welding.
  • Such material pairings are especially steel-steel.
  • the retaining plate which has become known from the state of the art is designed in one piece and is made from solid or the isolated struts are welded together to form their own structures. This disadvantageously means that the geometry of the retaining plate can not be changed when the transverse and longitudinal struts are firmly connected. However, should change the composition of the ceramic mass to be deformed, it is often necessary to replace the mouthpiece completely. Such retrofitting lead to downtime and are therefore undesirable and costly business management.
  • the entire mouthpiece can not be used. Even damage caused by wear cause the mouthpiece to be completely replaced.
  • a mouthpiece of the type mentioned available which consists of a modular holding plate, the geometric dimension is variably selectable and can be attached to the occasionally detachable handrails.
  • each of the crossbars can be fixed to the main bar at least two positions by means of the threaded bolts, so that after the mounting a dimensionally stable grid of the main bars and the crossbars is formed.
  • a plurality of webs is formed on the crossbars, which preferably protrude perpendicular to this.
  • Through-openings may be incorporated into both the transverse straps and the webs, in which the holding rods can be attached in a position-oriented and centered manner, or used to achieve optimum alignment of the support rods and their cores.
  • the respective support bar can be individually detached from the adhesive plate and replaced by another support rod, for example, if this is worn or if the material pairing is replaced.
  • handrails, main and transverse brackets are to be used, which have different length dimensions, in order to achieve an optimal alignment of the support rods and attached to these cores, because the longer the support rods, the greater the risk that these out of their predetermined Pressed out position during the pressing process.
  • the handrails are too short, then the ceramic mass will precede the passage no homogenous or sufficiently homogeneous structure between the respective adjacent cores.
  • the support rods are connected in a rotationally fixed manner to the retaining plate.
  • a bore is incorporated in the support rod, which runs perpendicular to the flow direction or the longitudinal axis of the support rod and into which a cylindrical pin is inserted.
  • the cylinder pin protrudes on both sides of the support rod out of this and is inserted into an incorporated in the retaining plate groove or notch.
  • the outer contour of the groove corresponds to the geometric dimension of the cylindrical pin, so that it rests in the groove and is held against rotation in this.
  • each of the support rods is accurately positionally fixed to the support plate, since the connection between the cylinder pin and the groove on the one hand, a centering of the support rod and on the other a rotation, so that the position and orientation of the respective core on the support rod during the extrusion process not is changed.
  • FIG. 1 is to take a mouthpiece 1, which is installed in a press channel 2 of an extruder, not shown.
  • a homogeneous ceramic mass 10 is conveyed through a screw conveyor associated with the extruder, which is forced through the mouthpiece 1 by the screw conveyor to form a molded article 25 in the extrusion process, in which a plurality of cavities 26 provided in the finished pressed state are that form a honeycomb structure.
  • Such moldings 25 are then heated and used as goat teats.
  • the mouthpiece 1 consists of a built-in press channel 2 Vorsetzplatte 4, on which a Anschraubfuss 5 is provided, to which by means of welding a main bracket 7 'is mounted.
  • a holding plate 7 is formed by the main bar 7 ', which consists of transverse bar 7 "attached to the main bar 7'.
  • the holding plate 7 has a plurality of main bars 7 'and transverse bars 7 aligned transversely and longitudinally with respect to the flow direction indicated by the reference number 9 ", which converge in each case in a node point, Thus, between the main and transverse straps 7 'and 7", a through-hole is provided, through which the ceramic mass 10 is forced.
  • two mutually parallel main brackets 7 ' are provided, which serve as support frames for the transverse straps 7 "to be fastened thereto.
  • a threaded hole 29 and the respective cross bar 7 " incorporated a through hole 28.
  • the through holes 28 are to be positioned in alignment with the threaded holes 29, so that in the through hole 28, a threaded screw 27 are inserted can, which is then screwed into the threaded hole 29.
  • a plurality of webs 30 are formed on each of the crossbars 7 ", which extend perpendicular to the cross bar 7".
  • Through-openings 11 are provided both in the webs 30 and in the transverse straps 7 ", into which a portion of the support rods 8 can be inserted in order to secure them in a centered and position-oriented manner, as will be explained in more detail below.
  • the webs 30 can be aligned at a predetermined inclination angle.
  • the support rods 8 are parallel to each other and parallel to the flow direction 9.
  • a core 20 is attached in each case, is formed by the respective cavity 26 in the molding 25 in the ceramic mass ,
  • the distance between the cores 20 and the holding plate 7 is to be dimensioned such that the ceramic mass 10 after passing through the holding plate 7 on the one hand can assume a homogeneous structure and on the other hand, that the deflection of the respective support rod 8 due to the prevailing pressures is not deflected when pressing the ceramic mass 10 from the predetermined position.
  • the support rod 8 may for example be made of a ceramic or metallic material and the support plate 7 may consist of one of these materials.
  • a bore 16 is incorporated into the support rod 8, which extends perpendicular to the flow direction 9 and the longitudinal axis 15 of the support rod 8.
  • a cylindrical pin 17 used, which protrudes from the two opposite lateral surfaces of the support rod 8.

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

Abstract

The mouthpiece (1) has a holding rod (8) attached to a holding plate (7), and a core (20) arranged at free end (18) of the holding rod. A passage aperture (28) is formed in transverse frame (7'') and extended in a region of a main frame (7'). A threaded bore (29) is provided in the main frame in a region of a crossover point with the transverse frame. A passage aperture is sealably aligned in a mounted condition at the threaded bore, and the transverse frame is fastened to the main frame by a thread screw (27).

Description

Die Erfindung bezieht sich auf ein Mundstück zur Herstellung eines Formlings aus einer keramischen Masse im Strangpressverfahren nach dem Oberbegriff des Patentanspruches 1.The invention relates to a mouthpiece for producing a molded article from a ceramic mass in the extrusion process according to the preamble of claim 1.

Aus der EP 19850104917 sind solche Mundstücke zu entnehmen. Üblicherweise werden dabei die Haltestangen, an deren freien Ende die Kerne zur Ausformung der Wabenstruktur oder Hohlräume in dem fertig gepressten Formling eingearbeitet sind, an die Halteplatte angeschweißt. Durch die Schweißnaht wird zwar eine verdrehsichere und dauerhafte Befestigung der jeweiligen Haltestange an der Halteplatte erzielt, jedoch können nachteiligerweise die Haltestangen nicht vereinzelt von der Halteplatte entfernt werden, wenn diese beispielsweise verschlissen sind.From the EP 19850104917 such mouthpieces are to be taken. Usually, the support rods, at the free end, the cores are incorporated to form the honeycomb structure or cavities in the finished pressed molding, welded to the support plate. Although a torsion-proof and permanent attachment of the respective support rod to the support plate is achieved by the weld, but disadvantageously, the support rods are not isolated from the support plate are removed if they are worn, for example.

Des Weiteren ist bei der Schweißverbindung zwischen der Haltestange und der Halteplatte als nachteilig anzusehen, dass die Haltestange und die Halteplatte eine Werkstoff-Paarung aufzuwiegen haben, die für das Schweißen geeignet ist. Solche Werkstoff-Paarungen sind insbesondere Stahl-Stahl. Bei dem Anschweißen der Haltestange an der Halteplatte entsteht Hitze, die zu einer Materialverformung führen kann, so dass die Haltestange und/oder die Halteplatte verzogen ist, wodurch die geometrischen Vorgaben zur Positionierung der Haltestange nicht eingehalten sind. Folglich sind Nachbearbeitungsschritte zur Korrektur dieses Herstellungsfehlers erforderlich.Furthermore, in the welded joint between the support rod and the retaining plate is to be regarded as disadvantageous that the support rod and the retaining plate have to weigh up a pair of materials, which is suitable for welding. Such material pairings are especially steel-steel. When welding the support rod to the support plate heat is generated, which can lead to a deformation of the material, so that the support rod and / or the support plate is warped, whereby the geometric specifications for positioning the support rod are not met. Consequently, post-processing steps are required to correct this manufacturing error.

Die aus dem Stand der Technik bekannt gewordene Halteplatte ist einstückig ausgestaltet und wird aus dem Vollen gefertigt oder die vereinzelten Streben werden zur Bildung eigener Strukturen aneinander geschweißt. Dies bedeutet nachteiligerweise, dass die Geometrie der Halteplatte nicht verändert werden kann sobald die Quer- und Längsstreben fest miteinander verbunden sind. Sollte sich jedoch die Zusammensetzung der zu verformenden keramischen Masse ändern, ist es oftmals notwendig, das Mundstück komplett auszuwechseln. Solche Umrüstmaßnahmen führen zu Stillstandszeiten und sind daher betriebswirtschaftlich unerwünscht und kostenintensiv.The retaining plate which has become known from the state of the art is designed in one piece and is made from solid or the isolated struts are welded together to form their own structures. This disadvantageously means that the geometry of the retaining plate can not be changed when the transverse and longitudinal struts are firmly connected. However, should change the composition of the ceramic mass to be deformed, it is often necessary to replace the mouthpiece completely. Such retrofitting lead to downtime and are therefore undesirable and costly business management.

Sollte zudem die Halteplatte lediglich an einer bestimmten Stelle verschlissen sein, kann das gesamte Mundstück nicht mehr eingesetzt werden. Auch solche durch Verschleiß verursachte Beschädigungen führen dazu, dass das Mundstück vollständig auszutauschen ist.In addition, should the plate only be worn at a certain point, the entire mouthpiece can not be used. Even damage caused by wear cause the mouthpiece to be completely replaced.

Es ist daher Aufgabe der Erfindung, ein Mundstück der eingangs genannten Gattung zur Verfügung zu stellen, das aus einer modular aufgebauten Halteplatte besteht, deren geometrische Abmessung variabel auswählbar ist und an der vereinzelt lösbare Haltestangen angebracht werden können. Dabei soll sowohl die die Halteplatte bildenden Haupt- und Querbügel als auch die Haltestangen, die aus unterschiedlichen Werkstoffen gefertigt sein können, zum Einsatz gelangen, ohne dass dabei die lageorientierte Befestigung zwischen der Haltestange und der Halteplatte verloren geht.It is therefore an object of the invention to provide a mouthpiece of the type mentioned available, which consists of a modular holding plate, the geometric dimension is variably selectable and can be attached to the occasionally detachable handrails. In this case, both the holding plate forming main and transverse brackets as well as the support rods, which can be made of different materials to get used, without losing the position-oriented attachment between the support rod and the support plate is lost.

Diese Aufgabe ist erfindungsgemäß durch die Merkmale des kennzeichnenden Teils von Patentanspruch 1 gelöst.This object is achieved by the features of the characterizing part of claim 1.

Weitere vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous developments of the invention will become apparent from the dependent claims.

Dadurch dass die Querbügel lösbar an den beiden parallel zueinander verlaufenden Hauptbügel angeschraubt sind, indem nämlich in die jeweiligen Querbügel eine im Bereich der Hauptbügel verlaufende Durchgangsöffnung eingearbeitet ist, die fluchtend zu einer der in den Hauptbügel vorgesehenen Gewindebohrungen verläuft, kann eine Gewindeschraube in den Querbügel eingesetzt werden, die anschließend in die Gewindebohrung des Hauptbügels eingedreht ist. Folglich kann jeder der Querbügel an mindestens zwei Positionen mittels den Gewindeschrauben an dem Hauptbügel befestigt werden, so dass nach der Montage ein formstabiles Gitternetz aus den Hauptbügeln und den Querbügeln gebildet ist.Characterized in that the transverse straps are detachably screwed to the two mutually parallel main bracket by namely in the respective cross bar a running in the region of the main bracket through hole is incorporated, which runs in alignment with one of the provided in the main bracket threaded holes, a threaded screw can be inserted into the crossbar, which is then screwed into the threaded hole of the main bracket. Consequently, each of the crossbars can be fixed to the main bar at least two positions by means of the threaded bolts, so that after the mounting a dimensionally stable grid of the main bars and the crossbars is formed.

Zudem ist an den Querbügeln eine Vielzahl von Stegen angeformt, die vorzugsweise senkrecht zu diesem abstehen. Sowohl in die Querbügel als auch in die Stege können Durchgangsöffnungen eingearbeitet sein, in denen die Haltestangen lageorientiert und zentriert befestigt, bzw. eingesetzt werden können, um eine optimale Ausrichtung der Haltestangen und deren Kerne zu erreichen.In addition, a plurality of webs is formed on the crossbars, which preferably protrude perpendicular to this. Through-openings may be incorporated into both the transverse straps and the webs, in which the holding rods can be attached in a position-oriented and centered manner, or used to achieve optimum alignment of the support rods and their cores.

Darüber hinaus kann die jeweilige Haltestange individuell von der Hafteplatte gelöst werden und durch eine andere Haltestange ersetzt werden, wenn diese beispielsweise verschlissen ist oder wenn die Werkstoff-Paarung auszutauschen ist.In addition, the respective support bar can be individually detached from the adhesive plate and replaced by another support rod, for example, if this is worn or if the material pairing is replaced.

Es hat sich nämlich seit langem herausgestellt, dass die Haltestangen und die Haupt- und Querbügel bei dem Durchpressen der keramischen Massen nicht nur aufgrund der hohen Reibung zwischen der Haltestange und den keramischen Massen verschlissen werden, sondern auch dass die Haltestangen durch die keramischen Massen aus ihrer vorgegebenen Position gedrückt sind. Demnach ist es oftmals erforderlich, möglichst biegesteife Werkstoffe zu verwenden, um solche Druckkräfte aufzunehmen und den Materialverschleiß an der Haltestange aufgrund dieser aus Reibung entstehenden Abnutzungen möglichst gering zu halten. Daher ist es besonders zweckmäßig, wenn Haltestangen aus einem keramischen Werkstoff verwendet werden können. Solche Materialien sind jedoch nicht geeignet, diese mittels einer Schweißnaht an der Halteplatte zu befestigen.It has long been found that the support rods and the main and transverse straps are worn in the pressing of the ceramic masses not only due to the high friction between the support rod and the ceramic masses, but also that the support rods by the ceramic masses of their Preselected position are pressed. Accordingly, it is often necessary to use as rigid as possible materials to absorb such pressure forces and to keep the wear of the material on the support rod due to this resulting from friction wear as low as possible. Therefore, it is particularly useful if handrails can be used from a ceramic material. However, such materials are not suitable to attach them by means of a weld on the mounting plate.

Desweiteren sollen Haltestangen, Haupt- und Querbügel verwendet werden können, die unterschiedliche Längenabmessungen aufweisen, um eine optimale Ausrichtung der Haltestangen und der an diesen angebrachten Kerne zu erreichen, denn je länger die Haltestangen sind, desto größer ist die Gefahr, dass diese aus ihrer vorgegebenen Position beim Pressvorgang herausgedrückt werden. Wenn die Haltestangen jedoch zu kurz bemessen sind, dann weist die keramische Masse vor dem Durchtritt zwischen den jeweiligen benachbart zueinander angeordneten Kernen keine homogene bzw. keine ausreichend homogene Struktur auf.Furthermore, handrails, main and transverse brackets are to be used, which have different length dimensions, in order to achieve an optimal alignment of the support rods and attached to these cores, because the longer the support rods, the greater the risk that these out of their predetermined Pressed out position during the pressing process. However, if the handrails are too short, then the ceramic mass will precede the passage no homogenous or sufficiently homogeneous structure between the respective adjacent cores.

Durch das auswechseln des Haupt- und/oder Querbügels kann die Position der Haltestange bzw. der Kerne verändert werden.By replacing the main and / or transverse bracket, the position of the support rod or cores can be changed.

Da es erforderlich ist, die an dem jeweiligen Ende der Haltestangen angebrachten Kerne lageorientiert während des Strangpressverfahrens zu halten, um eine vorgegebene Wabenstruktur in dem fertig gepressten Formling zu erreichen, sind, die Haltestangen drehfest mit der Halteplatte verbunden. Zu diesem Zweck ist in die Haltestange eine Bohrung eingearbeitet, die senkrecht zu der Strömungsrichtung bzw. der Längsachse der Haltestange verläuft und in die ein Zylinderstift eingeschoben ist. Der Zylinderstift ragt auf beiden Seiten der Haltestange aus dieser hinaus und ist in eine in die Halteplatte eingearbeitete Nut oder Kerbe eingesetzt. Die Außenkontur der Nut entspricht dabei der geometrischen Abmessung des Zylinderstiftes, so dass dieser in der Nut anliegt und verdrehsicher in dieser gehalten ist. Folglich ist jede der Haltestangen exakt lageorientiert an der Halteplatte befestigt, da die Verbindung zwischen dem Zylinderstift und der Nut zum einen eine Zentrierung der Haltestange und zum anderen eine Verdrehsicherung ermöglicht, so dass die Position und Ausrichtung des jeweiligen Kernes an der Haltestange während des Strangpressverfahrens nicht verändert ist.Since it is necessary to keep the cores attached to the respective end of the support rods in a positionally oriented manner during the extrusion process in order to achieve a predetermined honeycomb structure in the finished molded article, the support rods are connected in a rotationally fixed manner to the retaining plate. For this purpose, a bore is incorporated in the support rod, which runs perpendicular to the flow direction or the longitudinal axis of the support rod and into which a cylindrical pin is inserted. The cylinder pin protrudes on both sides of the support rod out of this and is inserted into an incorporated in the retaining plate groove or notch. The outer contour of the groove corresponds to the geometric dimension of the cylindrical pin, so that it rests in the groove and is held against rotation in this. Consequently, each of the support rods is accurately positionally fixed to the support plate, since the connection between the cylinder pin and the groove on the one hand, a centering of the support rod and on the other a rotation, so that the position and orientation of the respective core on the support rod during the extrusion process not is changed.

In der in den Querbügeln eingearbeiteten Durchgangsöffnungen sowie in der Durchgangsöffnungen der Stege sind Anlageflächen vorgesehen, die senkrecht zu der Längsachse der Haltestange ausgerichtet sind. Die Haltestange liegt mit ihrem freien Ende im montierten Zustand an der jeweiligen Anlagefläche an, so dass beim Eindrehen der Gewindeschraube in das Innengewinde der Haltestange zwischen der Haltestange und der Anlagefläche eine Anpresskraft entsteht, durch die die Haltestange an die Anlagefläche der Halteplatte angedrückt ist.In the incorporated in the transverse straps through holes and in the passage openings of the webs bearing surfaces are provided, which are aligned perpendicular to the longitudinal axis of the support rod. The support rod rests with its free end in the mounted state on the respective contact surface, so that upon insertion of the threaded screw in the internal thread of the support rod between the support rod and the contact surface creates a contact force by which the support rod is pressed against the contact surface of the support plate.

In der Zeichnung ist ein Mundstück der erfindungsgemäßen Art dargestellt, das nachfolgend näher erläutert ist. Im Einzelnen zeigt:

Figur 1
ein in einem Presskanal einer Strangpresse eingebauten Mundstück, bestehend aus einem mit dem Presskanal fest verbundenen Vorsetzplatte und aus einer an der Vorsetzplatte arretierten Halteplatte, an der eine Vielzahl von Haltestangen, an deren freien Ende ein Kern zur Einformung von Hohlräumen in eine keramische Masse vorgesehen ist, angeordnet ist, im Schnitt,
Figur 2
die Halteplatte gemäß Figur 1 mit lösbaren Haupt- und Querbügeln, in Draufsicht und
Figur 3
eine der Haltestangen mit einer ersten Verdrehsicherung gemäß Figur 1, die mittels einer Gewindeschraube lösbar an der Halteplatte angebracht sind, in zwei senkrecht zueinander verlaufenden Schnittdarstellungen,
In the drawing, a mouthpiece of the type according to the invention is shown, which is explained in more detail below. In detail shows:
FIG. 1
a built-in a press channel of an extruder mouthpiece, consisting of a firmly fixed to the press channel Vorsetzplatte and a locked on the Vorsetzplatte holding plate on which a plurality of support rods, at the free end of a core for the formation of cavities is provided in a ceramic mass , is arranged, on average,
FIG. 2
the holding plate according to FIG. 1 with detachable main and transverse brackets, in plan view and
FIG. 3
one of the support rods with a first rotation according to FIG. 1 , which are detachably attached by means of a threaded screw to the holding plate, in two mutually perpendicular sectional views,

Figur 1 ist ein Mundstück 1 zu entnehmen, das in einem Presskanal 2 einer nicht dargestellten Strangpresse eingebaut ist. Durch den Presskanal 2 ist durch eine der Strangpresse zugeordnete Förderschnecke eine homogene keramische Masse 10 gefördert, die durch das Mundstück 1 durch die Förderschnecke hindurchgedrückt ist, um einen Formling 25 im Strangpressverfahren zu formen, in dem eine Vielzahl von Hohlräumen 26 im fertig gepressten Zustand vorgesehen sind, die eine Wabenstruktur bilden. Solche Formlinge 25 werden anschließend erhitzt und als Ziegeisteine verwendet. FIG. 1 is to take a mouthpiece 1, which is installed in a press channel 2 of an extruder, not shown. Through the press channel 2, a homogeneous ceramic mass 10 is conveyed through a screw conveyor associated with the extruder, which is forced through the mouthpiece 1 by the screw conveyor to form a molded article 25 in the extrusion process, in which a plurality of cavities 26 provided in the finished pressed state are that form a honeycomb structure. Such moldings 25 are then heated and used as goat teats.

Das Mundstück 1 besteht aus einer in dem Presskanal 2 eingebauten Vorsetzplatte 4, an der ein Anschraubfuss 5 vorgesehen ist, an dem mittels Verschweißung ein Hauptbügel 7' angebracht ist. Durch den Hauptbügel 7' wird eine Halteplatte 7 gebildet, die aus an dem Hauptbügel 7' angebrachten Querbügel 7" besteht. Die Halteplatte 7 weist dabei eine Vielzahl von quer und längs zu der mit der Bezugsziffer 9 gekennzeichneten Strömungsrichtung ausgerichteten Hauptbügel 7' und Querbügel 7" auf, die jeweils in einen Knotenpunkt zusammenlaufen, Somit ist zwischen den Haupt- und Querbügeln 7' und 7" eine Durchgangsöffnung geschaffen, durch die die keramische Masse 10 hindurchgedrückt ist.The mouthpiece 1 consists of a built-in press channel 2 Vorsetzplatte 4, on which a Anschraubfuss 5 is provided, to which by means of welding a main bracket 7 'is mounted. A holding plate 7 is formed by the main bar 7 ', which consists of transverse bar 7 "attached to the main bar 7'. The holding plate 7 has a plurality of main bars 7 'and transverse bars 7 aligned transversely and longitudinally with respect to the flow direction indicated by the reference number 9 ", which converge in each case in a node point, Thus, between the main and transverse straps 7 'and 7", a through-hole is provided, through which the ceramic mass 10 is forced.

Üblicherweise sind zwei parallel zueinander verlaufende Hauptbügel 7', die als Tragrahmen für die daran zu befestigenden Querbügel 7" dienen, vorgesehen. Im Bereich der Knotenpunkte, also im Kreuzungsbereich zwischen den Hauptbügeln 7' und dem jeweiligen Querbügel 7" ist in den Hauptbügel 7' eine Gewindebohrung 29 und den jeweiligen Querbügel 7" eine Durchgangsöffnung 28 eingearbeitet. Bei der Montage der Querbügel 7" an die beiden Hauptbügel 7' sind die Durchgangsöffnungen 28 fluchtend zu den Gewindebohrungen 29 zu positionieren, so dass in die Durchgangsöffnung 28 eine Gewindeschraube 27 eingesteckt werden kann, die anschließend in die Gewindebohrung 29 eingedreht ist. Durch die jeweilige Gewindeschraube 27 werden demnach die Querbügel 7" an die Hauptbügel 7' montiert. Folglich verlaufen die Hauptbügel 7' und die Querbügel 7" senkrecht zueinander. Es ist jedoch auch denkbar, dass die Querbügel 7" in einem bestimmten Neigungswinkel zwischen den Hauptbügeln 7' angeordnet sind.Usually, two mutually parallel main brackets 7 'are provided, which serve as support frames for the transverse straps 7 "to be fastened thereto. a threaded hole 29 and the respective cross bar 7 "incorporated a through hole 28. When mounting the cross bar 7" to the two main bracket 7 ', the through holes 28 are to be positioned in alignment with the threaded holes 29, so that in the through hole 28, a threaded screw 27 are inserted can, which is then screwed into the threaded hole 29. Accordingly, the transverse brackets 7 "are mounted on the main brackets 7 'by the respective threaded screw 27. Consequently, the main brackets 7' and the transverse brackets 7" run perpendicular to one another. However, it is also conceivable that the crossbars 7 "are arranged at a certain angle of inclination between the main bars 7 '.

Um die Haltestangen 8 an der Halteplatte 7 zu befestigen, sind an jedem der Querbügel 7" eine Vielzahl von Stegen 30 angeformt, die senkrecht zu dem Querbügel 7" verlaufen. Sowohl in den Stegen 30 als auch in den Querbügeln 7" sind Durchgangsöffnungen 11 vorgesehen, in die ein Teilbereich der Haltestangen 8 eingesteckt werden können, um diese zentriert und lageorientiert, wie dies nachfolgend noch näher erläutert ist, zu befestigen.In order to attach the support rods 8 to the support plate 7, a plurality of webs 30 are formed on each of the crossbars 7 ", which extend perpendicular to the cross bar 7". Through-openings 11 are provided both in the webs 30 and in the transverse straps 7 ", into which a portion of the support rods 8 can be inserted in order to secure them in a centered and position-oriented manner, as will be explained in more detail below.

Auch die Stege 30 können unter einem vorgegebenen Neigungswinkel ausgerichtet werden.Also, the webs 30 can be aligned at a predetermined inclination angle.

Da die Hauptbügel 7' und die Querbügel 7" mit einer lösbaren Gewindeschraube 27 miteinander befestigt sind, können diese Bauteile vereinzelt werden, um diese bei Beschädigung auszuwechseln oder falls sich die Geometrie der Halteplatte 7 an einen anderen zu verformenden Werkstoff anzupassen hat, entsprechend durch einen andersartig konstruktiv ausgestalteten Querbügel 7" ersetzt werden.Since the main bracket 7 'and the cross bar 7 "are fastened together with a detachable threaded screw 27, these components can be separated to replace them in case of damage or if the geometry of the support plate 7 has to adapt to another material to be deformed, according to a otherwise structurally designed cross bar 7 "to be replaced.

Die Haltestangen 8 verlaufen parallel zueinander und parallel zu der Strömungsrichtung 9. An dem von der Halteplatte 7 abgewandten freien Ende 18 der Haltestange 8 ist jeweils ein Kern 20 aufgesteckt, durch den in die keramische Masse 10 der jeweilige Hohlraum 26 in dem Formling 25 eingeformt ist.The support rods 8 are parallel to each other and parallel to the flow direction 9. At the side remote from the holding plate 7 free end 18 of the support rod 8, a core 20 is attached in each case, is formed by the respective cavity 26 in the molding 25 in the ceramic mass ,

Der Abstand zwischen den Kernen 20 und der Halteplatte 7 ist dabei derart zu bemessen, dass die keramische Masse 10 nach dem Durchtritt durch die Halteplatte 7 zum einen eine homogene Struktur einnehmen kann und zum anderen, dass die Auslenkung der jeweiligen Haltestange 8 aufgrund der vorherrschenden Drücke beim Hindurchpressen der keramischen Masse 10 aus der vorgegebenen Position nicht ausgelenkt wird. Diese geometrischen Verhältnisse sind an die verwendete keramische Masse 10, die verschiedenartige Strukturen aufweisen, und an die vorherrschenden Druckzustände anzupassen.The distance between the cores 20 and the holding plate 7 is to be dimensioned such that the ceramic mass 10 after passing through the holding plate 7 on the one hand can assume a homogeneous structure and on the other hand, that the deflection of the respective support rod 8 due to the prevailing pressures is not deflected when pressing the ceramic mass 10 from the predetermined position. These geometric relationships are to be adapted to the ceramic mass 10 used, which have various structures, and to the prevailing pressure states.

Insbesondere aus der Figur 3 ist ersichtlich, dass in die jeweilige Haltestange 8 an dem der Halteplatte 7 zugewandten Stirnseite 18 ein Innengewinde 12 eingearbeitet ist. Das freie Ende 18 der Haltestange 8, das in die Durchgangsöffnung 11 der Halteplatte 7 eingesetzt ist, liegt dabei im montierten Zustand an einer umlaufenden Anlagefläche 31 der Durchgangsöffnung 11 an. Die Anlagefläche 31 verläuft demnach senkrecht zu der Strömungsrichtung 9 bzw. der Längsachse 15 der Haltestangen 8. Mit Hilfe einer in die Durchgangsöffnung 11 eingesetzten Gewindeschraube 13 wird demnach die jeweilige Haltestage 8 in Richtung der Anlagefläche 31 angedrückt, so dass das freie Ende 32 der Haltestange 8 an dieser im montierten Zustand angepresst ist.In particular from the FIG. 3 It can be seen that in the respective support rod 8 on the holding plate 7 facing end face 18, an internal thread 12 is incorporated. The free end 18 of the support rod 8, which is inserted into the through hole 11 of the holding plate 7, is in the mounted state at a circumferential bearing surface 31 of the through hole 11 at. The contact surface 31 thus runs perpendicular to the flow direction 9 and the longitudinal axis 15 of the support rods 8. With the help of a threaded screw 13 inserted into the through hole 11, the respective holding 8 days is pressed in the direction of the contact surface 31, so that the free end 32 of the support rod 8 is pressed against this in the mounted state.

Aufgrund der Verschraubung zwischen der Haltestange 8 und der Halteplatte 7 können die Haltestangen 8 individuell, also vereinzelt, von der Halteplatte 7 entfernt bzw. an dieser montiert werden. Darüber hinaus ist die Werkstoff-Paarung zwischen der Halteplatte 7 und der jeweiligen Haltestange 8 unbeeinflusst von der Befestigungsart, da die Verschraubung der Haltestange 8 an der Halteplatte 7 jede Material-Paarung zulässt. Somit kann die Haltestange 8 beispielsweise aus einem keramischen oder metallischen Werkstoff gefertigt sein und auch die Halteplatte 7 kann aus einem dieser Werkstoffe bestehen.Due to the screw connection between the support rod 8 and the holding plate 7, the support rods 8 individually, so isolated, removed from the support plate 7 and be mounted on this. In addition, the material pairing between the holding plate 7 and the respective support rod 8 is unaffected by the fastening, since the screwing of the support rod 8 to the support plate 7 allows any material pairing. Thus, the support rod 8 may for example be made of a ceramic or metallic material and the support plate 7 may consist of one of these materials.

Um die Haltestange 8 verdrehsicher an der Halteplatte 7 zu befestigen, ist in die Haltestange 8 eine Bohrung 16 eingearbeitet, die senkrecht zu der Strömungsrichtung 9 bzw. der Längsachse 15 der Haltestange 8 verläuft. In die Bohrung 16 ist ein Zylinderstift 17 eingesetzt, der aus den beiden gegenüberliegenden Mantelflächen der Haltestange 8 übersteht.To secure the support rod 8 against rotation on the support plate 7, a bore 16 is incorporated into the support rod 8, which extends perpendicular to the flow direction 9 and the longitudinal axis 15 of the support rod 8. In the bore 16 is a cylindrical pin 17 used, which protrudes from the two opposite lateral surfaces of the support rod 8.

Claims (8)

Mundstück (1) zur Herstellung eines Formlings (25) aus einer keramischen Masse (10) im Strangpressverfahren mit einer Vielzahl von in diesem vorgesehenen Hohlräumen (26), bestehend aus - einer in einem Presskanal (2) eingesetzten Vorsetzplatte (4), - aus einer an der Vorsetzplatte (4) befestigten Halteplate (7), die aus mindestens zwei parallel zueinander ausgerichteten Hauptbügel (7') und mindestens zwei dazu senkrecht verlaufenden Querbügel (7") gebildet ist und - aus einer Vielzahl von an der Haltplatte (7) angebrachten Haltestangen (8), an deren jeweiligem freien Ende (18) ein Kern (20) zur Erzeugung der Hohlräume (26) in dem Formling (25) angeordnet ist, dadurch gekennzeichnet,
dass in die Querbügel (7") jeweils eine im Bereich der Hauptbügel (7') verlaufenden Durchgangsöffnung (28) eingearbeitet ist, dass in die Hauptbügel (7') jeweils im Bereich des Kreuzungspunktes mit dem Querbügel (7) eine Gewindebohrung (29) vorgesehen ist, dass im montierten Zustand die Durchgangsöffnung (28) fluchtend zu der Gewindebohrung (29) ausgerichtet ist und dass der jeweilige Querbügel (7") mittels einer Gewindeschraube (27) an dem Hauptbügel (7') befestigt ist.Mouthpiece (1) for producing a molded article (25) from a ceramic mass (10) in the extrusion process with a plurality of cavities (26) provided therein, consisting of a pre-setting plate (4) inserted in a press channel (2), - From one on the Vorsetzplatte (4) fixed holding plate (7), which is formed from at least two mutually parallel main bow (7 ') and at least two perpendicular thereto transverse bar (7 ") and - arranged from a plurality of on the support plate (7) holding rods (8), at the respective free end (18) has a core (20) for generating the cavities (26) in the molding (25) is arranged characterized,
in that a through hole (28) running in the area of the main bow (7 ') is incorporated in the cross brackets (7 "), that a threaded hole (29) is made in the main bow (7') in each case in the area of the crossing point with the cross bow (7). is provided that in the assembled state, the through hole (28) is aligned with the threaded bore (29) and that the respective cross bar (7 ") by means of a threaded screw (27) on the main bracket (7 ') is attached. Mundstück nach Anspruch 1,
dadurch gekennzeichnet,
dass an jedem Querbügel (7") eine Vielzahl von Stegen (30) angeformt sind, dass in dem Querbügel (7") und in die Stege (30) eine oder mehrere Durchgangsöffnungen (11) zur Aufnahme einer der Haltestangen (8) eingearbeitet ist und dass die jeweilige Haltestange (8) mittels einer Verdrehsicherung (14, 16, 17) zentriert und lageorientiert in der Durchgangsöffnung (11) gehalten ist.Mouthpiece according to claim 1,
characterized,
in that a multiplicity of webs (30) are integrally formed on each crosspiece (7 "), that one or more passage openings (11) for receiving one of the support rods (8) are incorporated in the crosspiece (7") and in the webs (30) and that the respective support rod (8) by means of a rotation (14, 16, 17) centered and positionally oriented in the through hole (11) is held. Mundstück (1) nach einem der vorgenannten Ansprüche,
dadurch gekennzeichnet,
dass in jede der Haltestangen (8) eine senkrecht zu der Längsachse (15) der Haltestange (8) verlaufende Bohrung (16) eingearbeitet ist und dass in jede Bohrung (16) ein Zylinderstift (17) eingesetzt ist, der im montierten Zustand in einer in der Halteplatte (7) eingearbeiteten Nut (14) eintaucht und dort drehfest gehalten ist.Mouthpiece (1) according to one of the preceding claims,
characterized,
that in each of the support rods (8) perpendicular to the longitudinal axis (15) of the support rod (8) extending bore (16) is incorporated and in that in each bore (16) has a cylindrical pin (17) is inserted, which in the assembled state in a in the retaining plate (7) incorporated groove (14) is immersed and held there against rotation. Mundstück (1) nach einem der vorgenannten Ansprüche,
dadurch gekennzeichnet,
dass an dem freien Ende (18) der jeweiligen Haltestange (8) eine Nut (19) eingearbeitet ist, dass an einem Kern (20) eine Nase (21) angeformt ist, deren Außenkontur mit der Innenkontur der Nut (19) korrespondiert und dass im montierten Zustand der Kern (20) mit der Nase (21) in die Nut (19) eingesetzt ist und dort rotationsfest gehalten ist.Mouthpiece (1) according to one of the preceding claims,
characterized,
that at the free end (18) of the respective support rod (8) a groove (19) is incorporated, that on a core (20) a nose (21) is formed, whose outer contour corresponds to the inner contour of the groove (19) and that in the assembled state, the core (20) with the nose (21) is inserted into the groove (19) and held there rotationally fixed. Mundstück (1) nach Anspruch 4,
dadurch gekennzeichnet,
dass der jeweilige Kern (20) eine Durchgangsöffnung (24) aufweist, dass in das freie Ende (18) der Haltestange (8) ein Innengewinde (22) eingearbeitet ist und dass die Durchgangsöffnung (24) des Kernes (20) von einer Gewindeschraube (23) durchgriffen ist, die in dem Innengewinde (22) der Haltestange (8) eingedreht ist.Mouthpiece (1) according to claim 4,
characterized,
that the respective core (20) having a through opening (24) that in the free end (18) of the holding bar (8) has an internal thread (22) is incorporated and in that the passage opening (24) of the core (20) (by a threaded bolt 23), which is screwed into the internal thread (22) of the support rod (8). Mundstück nach einem der vorgenannten Ansprüche,
dadurch gekennzeichnet,
dass die Längen der an der Halteplatte (7) eingeschraubten Haltestangen (8) derart bemessen sind, dass die freien Enden (18) der Haltestangen (8) in einer Ebene verlaufen.Mouthpiece according to one of the preceding claims,
characterized,
in that the lengths of the holding rods (8) screwed to the holding plate (7) are dimensioned such that the free ends (18) of the holding bars (8) extend in a plane. Mundstück nach einem der vorgenannten Ansprüche,
dadurch gekennzeichnet,
dass die Haltestangen (8) und/oder die Haupt- und/oder die Querbügel (7' bzw. 7") der Halteplatte (7) aus einem metallischen, keramischen oder aus einem biegesteifen Werkstoff hergestellt sind.Mouthpiece according to one of the preceding claims,
characterized,
that the support rods (8) and / or the main and / or the levers (7 'and 7 ") of the holding plate (7) are made of a metallic, ceramic or made of a rigid material. Mundstück nach einem der vorgenannten Ansprüche
dadurch gekennzeichnet,
dass an die Querbügel (7") unterschiedlich lange und/oder gebogene Stege (30) angeformt sind und dass die Querbügel (7") konstruktiv unterschiedlich zueinander ausgestaltet sind und dass die Querbügel (7") parallel und/oder geneigt zueinander an dem Hauptbügel (7') befestigt sind.Mouthpiece according to one of the preceding claims
characterized,
in that the crossbars (7 ") are formed with different lengths and / or curved webs (30) and that the crossbars (7") are designed to be structurally different from one another and that the crossbars (7 ") are parallel and / or inclined to one another on the mainbar (7 ') are attached.
EP12193557.1A 2012-11-21 2012-11-21 Extrusion die Active EP2735413B1 (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108819170A (en) * 2018-06-11 2018-11-16 太仓市兴益披覆有限公司 plastic extruder
DE102012223349B4 (en) * 2011-12-21 2020-10-01 Nanostone Water Gmbh Mouthpiece of an extruder for producing at least one shaped body
US11034052B2 (en) 2015-03-13 2021-06-15 Nanostone Water Gmbh Mouthpiece for extruding a molding compound into a formed body, and method for producing a mouthpiece of this type

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB956632A (en) * 1962-04-18 1964-04-29 Kenneth William Lenton Improvements in and relating to the manufacture of building bricks with transversely-directed perforations or recesses
JPS57171614U (en) * 1982-03-11 1982-10-28
DE3935894A1 (en) * 1989-10-27 1991-05-02 Ufotec Umformtechnologie Und V Cores for extruding bricks with through holes - are mounted on ends of steel bars enclosed in wear resistant tubes
JP2000176920A (en) * 1998-12-16 2000-06-27 Sawatetsu:Kk Core unit for extrusion molding machine
EP2230057A1 (en) * 2009-03-20 2010-09-22 Ziegelmundstückbau Braun GmbH Mouthpiece

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB956632A (en) * 1962-04-18 1964-04-29 Kenneth William Lenton Improvements in and relating to the manufacture of building bricks with transversely-directed perforations or recesses
JPS57171614U (en) * 1982-03-11 1982-10-28
DE3935894A1 (en) * 1989-10-27 1991-05-02 Ufotec Umformtechnologie Und V Cores for extruding bricks with through holes - are mounted on ends of steel bars enclosed in wear resistant tubes
JP2000176920A (en) * 1998-12-16 2000-06-27 Sawatetsu:Kk Core unit for extrusion molding machine
EP2230057A1 (en) * 2009-03-20 2010-09-22 Ziegelmundstückbau Braun GmbH Mouthpiece

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223349B4 (en) * 2011-12-21 2020-10-01 Nanostone Water Gmbh Mouthpiece of an extruder for producing at least one shaped body
US11034052B2 (en) 2015-03-13 2021-06-15 Nanostone Water Gmbh Mouthpiece for extruding a molding compound into a formed body, and method for producing a mouthpiece of this type
US11712817B2 (en) 2015-03-13 2023-08-01 Nanostone Water Gmbh Mouthpiece for extruding a molding compound into a formed body, and method for producing a mouthpiece of this type
CN108819170A (en) * 2018-06-11 2018-11-16 太仓市兴益披覆有限公司 plastic extruder

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