EP2372065B1 - Method for producing a piston of a door drive - Google Patents

Method for producing a piston of a door drive Download PDF

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Publication number
EP2372065B1
EP2372065B1 EP11159927.0A EP11159927A EP2372065B1 EP 2372065 B1 EP2372065 B1 EP 2372065B1 EP 11159927 A EP11159927 A EP 11159927A EP 2372065 B1 EP2372065 B1 EP 2372065B1
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EP
European Patent Office
Prior art keywords
toothing
piston
plastic
insert
bar
Prior art date
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Active
Application number
EP11159927.0A
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German (de)
French (fr)
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EP2372065A2 (en
EP2372065A3 (en
Inventor
Hermann Alber
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.)
Geze GmbH
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Geze GmbH
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Publication date
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Publication of EP2372065A2 publication Critical patent/EP2372065A2/en
Publication of EP2372065A3 publication Critical patent/EP2372065A3/en
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Publication of EP2372065B1 publication Critical patent/EP2372065B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/10—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction
    • E05F3/102—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction with rack-and-pinion transmission between driving shaft and piston within the closer housing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/43—Motors
    • E05Y2201/448—Fluid motors; Details thereof
    • E05Y2201/456—Pistons
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/45—Manufacturing
    • E05Y2800/46—Injection moulding
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/67—Materials; Strength alteration thereof
    • E05Y2800/68—Combinations of materials creating distinct article parts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors

Definitions

  • the invention relates to a method for producing a piston of a door drive according to claim 1.
  • a drive for a wing of a door or a window with a housing, with a receiving space for supporting the drive.
  • the drive has a piston, which has a shape-stabilizing insert, wherein the piston wall thickness is formed at least in sections by an inner and outer side cover layer made of plastic.
  • the EP 1 705 329 A1 discloses a drive for a wing of a door or a window, with a metal housing having a receiving space in which an energy storage and an at least partially made of plastic piston are arranged.
  • the piston has at least one insert formed as a toothed part, with a toothing, which cooperates with a arranged on an output shaft of the drive pinion for wing movement.
  • the invention has for its object to improve the production of an at least partially made of plastic piston of a door drive to the effect that the teeth of the piston is kept safe from plastic.
  • An injection mold as it is used for the production of a piston of a door drive, usually consists of a plurality of identical mold cavities, which are designed for producing a respective piston. Each mold cavity has a core for receiving an insert, which has a supporting effect for the finished piston.
  • the insert may be integrally or multiply joined, for example, welded, formed, wherein two the piston end faces forming end plates, a arranged between the end plates support web and a toothed web are provided. At the toothed web a toothing, which interacts with the pinion in the door drive, arranged.
  • the arranged in the mold cavity core also has a toothing, which corresponds to the toothing of the toothed web of the insert.
  • a toothing which corresponds to the toothing of the toothed web of the insert.
  • at least one runner is provided in the injection mold, which is directed in the direction of the toothed web.
  • at least two sprue channels are provided, which are directed in the direction of the toothed web and distributed along the longitudinal extent thereof.
  • the overmolded piston is thus advantageously completely surrounded by plastic, wherein only the toothing is kept completely free of plastic.
  • Fig. 1 is a mold cavity 1 shown an injection mold, which may usually have a plurality of mold cavities 1, whereby in an injection molding process, several parts can be produced.
  • the mold cavity 1 is shown here in the open state, whereby the view is given on the mold body 2 serving for mounting the injection mold, which may also contain cooling holes and ejector, and on a core 3 for arranging an insert 6.
  • the core 3 has a toothing 5, which corresponds to a toothing 10 of the insert 6, as shown in the Fig. 2 in one opposite the Fig. 1 enlarged view is shown.
  • the insert 6 formed from two end disks 7, a support web 8 and a toothed web 9 is in the Fig. 3 shown. At the toothed web 9, the toothing 10 is formed.
  • a runner 4.1 and a runner 4.2 are provided which are distributed along the extension of the insert 6, as shown in the figures.
  • the Fig. 4 shows the mold cavity 1 with inserted insert 6.
  • a further, optional manufacturing step is shown, wherein slide 11, 12 are inserted into the end plates 7 to form holes provided in the end plates.
  • the slide 11, 12 may have a smaller diameter than already provided in the end plates 7 holes, whereby the holes can be provided with plastic 14 inside.
  • the slide 11, 12 are inserted after closing the injection mold.
  • the view in the opened state is used here to describe the process.
  • the slides 11, 12 are of course already provided in the injection mold and are not shown in all figures for reasons of clarity. Also, other components that are required to operate the slider 11, 12, also for reasons of clarity, not shown. If no holes are provided or these are only attached to the finished product by post-processing, the slide can be omitted.
  • the plastic 14 is injected over the longitudinally of the toothed web 9 spaced sprue channels 4.1 and 4.2.
  • Fig. 6 is the open mold cavity 1 shown after the injection process.
  • the toothing 10 is flush and without a gap on the toothing 5 of the core 3, whereby the teeth 10 on the system with the Gearing 5 completely free of plastic 14 remains.
  • the support web 8 of the insert 6 slightly lifted from the core 3, whereby the support web 8 is thinly coated with plastic 14 on the core 3 side facing.
  • FIG. 8 the overmolded piston 13 after removal from the mold cavity 1 is shown. There are the forehead slides 7 and the support bar 8 completely surrounded by plastic 14. Only the teeth 10 of the toothed web 9 is kept free of plastic 14. The toothed web 9 is otherwise surrounded by plastic 14, wherein the teeth of the toothing 10 laterally still have a layer of plastic 14, as shown in the Fig. 8 is shown.

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Kolbens eines Türantriebs nach Anspruch 1.The invention relates to a method for producing a piston of a door drive according to claim 1.

Aus der DE 102 59 237 A1 ist ein Antrieb für einen Flügel einer Tür oder eines Fensters bekannt, mit einem Gehäuse, mit einem Aufnahmeraum zur Abstützung des Antriebs. Der Antrieb weist einen Kolben auf, der ein formstabilisierendes Einlegeteil aufweist, wobei die Kolbenwandstärke zumindest abschnittsweise durch eine innen- und außenseitige Deckschicht aus Kunststoff gebildet ist.From the DE 102 59 237 A1 is known a drive for a wing of a door or a window, with a housing, with a receiving space for supporting the drive. The drive has a piston, which has a shape-stabilizing insert, wherein the piston wall thickness is formed at least in sections by an inner and outer side cover layer made of plastic.

Die EP 1 705 329 A1 offenbart einen Antrieb für einen Flügel einer Tür oder eines Fensters, mit einem metallenen Gehäuse mit einem Aufnahmeraum, in welchem ein Energiespeicher und ein zumindest teilweise aus Kunststoff bestehender Kolben angeordnet sind. Der Kolben weist mindestens ein als Verzahnungsteil ausgebildetes Einlegeteil auf, mit einer Verzahnung, welche mit einem an einer Abtriebswelle des Antriebs angeordneten Ritzel zur Flügelbewegung zusammenwirkt.The EP 1 705 329 A1 discloses a drive for a wing of a door or a window, with a metal housing having a receiving space in which an energy storage and an at least partially made of plastic piston are arranged. The piston has at least one insert formed as a toothed part, with a toothing, which cooperates with a arranged on an output shaft of the drive pinion for wing movement.

Es hat sich in der Praxis herausgestellt, dass das Freihalten der Verzahnung des Kolbens von Kunststoff problematisch ist, da durch den beim Spritzgießen auftretenden Spritzdruck Kunststoffmaterial auf die Verzahnung gelangen kann. Da sich das Ritzel auf der Verzahnung wälzt, ist die Verzahnung in diesem Bereich jedoch völlig frei von Kunststoff zu halten.It has been found in practice that the maintenance of the teeth of the piston of plastic is problematic, as can occur due to the injection pressure occurring during injection molding plastic material on the teeth. Since the pinion rotates on the toothing, but the teeth in this area is to keep completely free of plastic.

Der Erfindung liegt die Aufgabe zugrunde, die Herstellung eines zumindest teilweise aus Kunststoff bestehenden Kolbens eines Türantriebs dahingehend zu verbessern, dass die Verzahnung des Kolbens sicher von Kunststoff freigehalten ist.The invention has for its object to improve the production of an at least partially made of plastic piston of a door drive to the effect that the teeth of the piston is kept safe from plastic.

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

Eine Spritzgussform, wie diese für die Herstellung eines Kolbens eines Türantriebs verwendet wird, besteht in der Regel aus mehreren gleichen Formnestern, welche zur Herstellung jeweils eines Kolbens ausgebildet sind. Jedes Formnest weist einen Kern zur Aufnahme eines Einlegeteils auf, welches stützende Wirkung für den fertigen Kolben hat. Durch das Einlegeteil wird auch vorteilhaft die Wandstärke der aufzubringenden Kunststoffschicht in gleicher Stärke gehalten, wodurch eine gleichmäßige Kunststoffschicht ohne Einfallstellen erzielt wird. Das Einlegeteil kann einstückig oder mehrteilig gefügt, beispielsweise geschweißt, ausgebildet sein, wobei zwei die Kolbenstirnseiten bildende Stirnscheiben, ein zwischen den Stirnscheiben angeordneter Stützsteg und ein Verzahnungssteg vorgesehen sind. Am Verzahnungssteg ist eine Verzahnung, welche im Türantrieb mit dem Ritzel zusammenwirkt, angeordnet.An injection mold, as it is used for the production of a piston of a door drive, usually consists of a plurality of identical mold cavities, which are designed for producing a respective piston. Each mold cavity has a core for receiving an insert, which has a supporting effect for the finished piston. By inserting the wall thickness of the applied plastic layer is also advantageously maintained in the same strength, whereby a uniform plastic layer without sink marks is achieved. The insert may be integrally or multiply joined, for example, welded, formed, wherein two the piston end faces forming end plates, a arranged between the end plates support web and a toothed web are provided. At the toothed web a toothing, which interacts with the pinion in the door drive, arranged.

Der im Formnest angeordnete Kern weist ebenfalls eine Verzahnung auf, die mit der Verzahnung des Verzahnungsstegs des Einlegeteils korrespondiert. Um die Verzahnung des Verzahnungsstegs und damit die Verzahnung des nach dem Umspritzen mit Kunststoff fertigen Kolbens völlig von Kunststoff freizuhalten, ist in der Spritzgussform wenigstens ein Angusskanal vorgesehen, der in Richtung auf den Verzahnungssteg gerichtet ist. Vorzugsweise sind mindestens zwei Angusskanäle vorgesehen, die in Richtung auf den Verzahnungssteg gerichtet und entlang dessen Längserstreckung verteilt angeordnet sind. Beim Einspritzen des Kunststoffs wird dadurch die gegenüber den Angusskanälen am Verzahnungssteg angeordnete Verzahnung auf die Verzahnung des Kerns gepresst, wodurch diese so formschlüssig aufeinander liegen, sodass kein Kunststoff zwischen die Verzahnungen dringen kann.The arranged in the mold cavity core also has a toothing, which corresponds to the toothing of the toothed web of the insert. In order to keep the toothing of the toothed web and thus the toothing of the finished by molding with plastic piston completely free of plastic, at least one runner is provided in the injection mold, which is directed in the direction of the toothed web. Preferably, at least two sprue channels are provided, which are directed in the direction of the toothed web and distributed along the longitudinal extent thereof. When the plastic is injected, the toothing arranged opposite the sprue channels on the toothed web is thereby pressed onto the toothing of the core, as a result of which they lie on one another in a form-fitting manner so that no plastic can penetrate between the toothings.

Der umspritzte Kolben ist somit vorteilhaft vollständig von Kunststoff umgeben, wobei ausschließlich die Verzahnung völlig frei von Kunststoff gehalten ist.The overmolded piston is thus advantageously completely surrounded by plastic, wherein only the toothing is kept completely free of plastic.

Im Nachfolgenden wird ein Ausführungsbeispiel in der Zeichnung anhand der Figuren näher erläutert.In the following an embodiment in the drawing with reference to the figures will be explained in more detail.

Dabei zeigen:

Fig. 1
eine Ansicht auf ein geöffnetes Formnest eines Spritzgussform für einen Kolben;
Fig. 2
einen Ausschnitt des Kerns des Formnests gemäß Fig. 1 in vergrößerter Ansicht;
Fig. 3
ein Einlegeteil zur Herstellung des Kolbens;
Fig. 4
das Formnest gemäß Fig. 1 mit eingesetztem Einlegeteil;
Fig. 5
das Formnest mit Einlegeteil, wobei die Anordnung von Schiebern gezeigt ist;
Fig. 6
das Formnest gemäß Fig. 5 nach dem Spritzvorgang mit dem umspritzten Kolben;
Fig. 7
das Formnest nach dem Spritzvorgang, wobei die Anordnung der Schieber nicht gezeigt ist;
Fig. 8
der fertige, mit Kunststoff versehene Kolben.
Showing:
Fig. 1
a view of an open mold cavity of an injection mold for a piston;
Fig. 2
a section of the core of the mold cavity according to Fig. 1 in enlarged view;
Fig. 3
an insert for making the piston;
Fig. 4
the mold nest according to Fig. 1 with inserted insert;
Fig. 5
the mold cavity with insert showing the arrangement of slides;
Fig. 6
the mold nest according to Fig. 5 after the injection process with the overmolded piston;
Fig. 7
the mold cavity after the injection process, wherein the arrangement of the slide is not shown;
Fig. 8
the finished, provided with plastic piston.

In Fig. 1 ist ein Formnest 1 einer Spritzgussform gezeigt, welche üblicherweise mehrere Formnester 1 aufweisen kann, wodurch bei einem Spritzgussvorgang mehrere Teile herstellbar sind. Das Formnest 1 ist hier in geöffnetem Zustand dargestellt, wodurch die Ansicht auf den zum Aufspannen der Spritzgussform dienenden Formkörper 2, der auch Kühlbohrungen und Auswerfer enthalten kann, und auf einen Kern 3 zur Anordnung eines Einlegeteils 6 gegeben ist.In Fig. 1 is a mold cavity 1 shown an injection mold, which may usually have a plurality of mold cavities 1, whereby in an injection molding process, several parts can be produced. The mold cavity 1 is shown here in the open state, whereby the view is given on the mold body 2 serving for mounting the injection mold, which may also contain cooling holes and ejector, and on a core 3 for arranging an insert 6.

Der Kern 3 weist eine Verzahnung 5 auf, welche mit einer Verzahnung 10 des Einlegeteils 6 korrespondiert, wie es in der Fig. 2 in einer gegenüber der Fig. 1 vergrößerten Darstellung gezeigt ist.The core 3 has a toothing 5, which corresponds to a toothing 10 of the insert 6, as shown in the Fig. 2 in one opposite the Fig. 1 enlarged view is shown.

Das aus zwei Stirnscheiben 7, einem Stützsteg 8 und einem Verzahnungssteg 9 gebildete Einlegeteil 6 ist in der Fig. 3 gezeigt. Am Verzahnungssteg 9 ist die Verzahnung 10 ausgebildet.The insert 6 formed from two end disks 7, a support web 8 and a toothed web 9 is in the Fig. 3 shown. At the toothed web 9, the toothing 10 is formed.

Um einen gleichmäßigen Andruck der Verzahnung 10 des Einlegeteils 8 an der Verzahnung 5 des Kerns 3 zu erhalten, sind ein Angusskanal 4.1 und ein Angusskanal 4.2 vorgesehen, welche längs der Erstreckung des Einlegeteils 6 verteilt angeordnet sind, wie es in den Figuren gezeigt ist.In order to obtain a uniform pressure of the toothing 10 of the insert 8 on the toothing 5 of the core 3, a runner 4.1 and a runner 4.2 are provided which are distributed along the extension of the insert 6, as shown in the figures.

Die Fig. 4 zeigt das Formnest 1 mit eingelegtem Einlegeteil 6. In der Fig. 5 ist ein weiterer, optionaler Herstellungsschritt gezeigt, wobei Schieber 11, 12 in die Stirnscheiben 7 eingeschoben sind, um in den Stirnscheiben vorgesehene Bohrungen auszubilden. Die Schieber 11, 12 können dabei einen geringeren Durchmesser aufweisen, als bereits in den Stirnscheiben 7 vorgesehenen Bohrungen, wodurch die Bohrungen auch innen mit Kunststoff 14 versehen werden können. Selbstverständlich werden die Schieber 11, 12 erst nach Schließen der Spritzgussform eingeschoben. Die Ansicht in geöffnetem Zustand dient hier der Darstellung zur Beschreibung des Ablaufs. Die Schieber 11, 12 sind selbstverständlich bereits in der Spritzgussform vorgesehen und sind aus Übersichtlichkeitsgründen nicht in allen Figuren dargestellt. Auch sind weitere Bauteile, welche zur Betätigung der Schieber 11, 12 erforderlich sind, ebenfalls aus Gründen der Übersichtlichkeit, nicht dargestellt. Sind keine Bohrungen vorgesehen oder werden diese erst am Fertigprodukt durch Nachbearbeitung angebracht, können die Schieber entfallen.The Fig. 4 shows the mold cavity 1 with inserted insert 6. In the Fig. 5 a further, optional manufacturing step is shown, wherein slide 11, 12 are inserted into the end plates 7 to form holes provided in the end plates. The slide 11, 12 may have a smaller diameter than already provided in the end plates 7 holes, whereby the holes can be provided with plastic 14 inside. Of course, the slide 11, 12 are inserted after closing the injection mold. The view in the opened state is used here to describe the process. The slides 11, 12 are of course already provided in the injection mold and are not shown in all figures for reasons of clarity. Also, other components that are required to operate the slider 11, 12, also for reasons of clarity, not shown. If no holes are provided or these are only attached to the finished product by post-processing, the slide can be omitted.

Nach Einlegen des Einlegeteils 6 und Schließen der Spritzgussform sowie der Positionierung der Schieber 11, 12 wird der Kunststoff 14 über die längs des Verzahnungsstegs 9 beabstandet angeordneten Angusskanäle 4.1 und 4.2 eingespritzt.After inserting the insert 6 and closing the injection mold and the positioning of the slide 11, 12, the plastic 14 is injected over the longitudinally of the toothed web 9 spaced sprue channels 4.1 and 4.2.

In der Fig. 6 ist das geöffnete Formnest 1 nach dem Spritzvorgang dargestellt. Durch das Anpressen des Verzahnungsstegs 9 gegen den Kern 3 beim Einspritzen des Kunststoffs 14 liegt die Verzahnung 10 bündig und ohne Spalt an der Verzahnung 5 des Kerns 3 an, wodurch die Verzahnung 10 an der Anlage mit der Verzahnung 5 völlig frei von Kunststoff 14 bleibt. Gleichzeit wird durch den Andruck der Verzahnungen 5, 10 gegeneinander der Stützsteg 8 des Einlegeteils 6 geringfügig vom Kern 3 abgehoben, wodurch der Stützsteg 8 auch auf der dem Kern 3 zugewandten Seite dünn mit Kunststoff 14 überzogen ist.In the Fig. 6 is the open mold cavity 1 shown after the injection process. By pressing the toothed web 9 against the core 3 during injection of the plastic 14, the toothing 10 is flush and without a gap on the toothing 5 of the core 3, whereby the teeth 10 on the system with the Gearing 5 completely free of plastic 14 remains. At the same time by the pressure of the teeth 5, 10 against each other, the support web 8 of the insert 6 slightly lifted from the core 3, whereby the support web 8 is thinly coated with plastic 14 on the core 3 side facing.

In der Fig. 8 ist der umspritzte Kolben 13 nach der Entnahme aus dem Formnest 1 gezeigt. Es sind die Stirnschieben 7 und der Stützsteg 8 vollständig von Kunststoff 14 umgeben. Lediglich die Verzahnung 10 des Verzahnungsstegs 9 ist frei von Kunststoff 14 gehalten. Der Verzahnungssteg 9 ist ansonsten von Kunststoff 14 umgegeben, wobei auch die Zähne der Verzahnung 10 seitlich noch eine Schicht Kunststoff 14 aufweisen, wie es in der Fig. 8 gezeigt ist.In the Fig. 8 the overmolded piston 13 after removal from the mold cavity 1 is shown. There are the forehead slides 7 and the support bar 8 completely surrounded by plastic 14. Only the teeth 10 of the toothed web 9 is kept free of plastic 14. The toothed web 9 is otherwise surrounded by plastic 14, wherein the teeth of the toothing 10 laterally still have a layer of plastic 14, as shown in the Fig. 8 is shown.

Liste der ReferenzzeichenList of reference characters

11
Formnestcavity
22
Formkörper, AuswerferseiteShaped body, ejector side
33
Kerncore
4.14.1
Angusskanalrunner
4.24.2
Angusskanalrunner
55
Verzahnung (Kern)Gearing (core)
66
Einlegeteilinsert
77
Stirnscheibeend disk
88th
Stützstegsupporting web
99
Verzahnungssteggearing bridge
1010
Verzahnung (Einlegeteil)Toothing (insert)
1111
Schieberpusher
1212
Schieberpusher
1313
Kolben, umspritztPiston, overmoulded
1414
Kunststoffplastic

Claims (1)

  1. Method for producing a piston (13) of a door drive,
    characterized by the steps of:
    - placing an insert (6), which comprises two end plates (7), a supporting bar (8) arranged between the end plates (7) and a toothing bar (9), into a mould cavity (1) of an injection mould,
    - placing a toothing (10) of the toothing bar (9) of the insert (6) against a corresponding toothing (5) of a core (3) in the mould cavity (1),
    - closing the injection mould,
    - injecting the plastic (14) through at least one feed channel (4.1, 4.2), preferably through at least two feed channels (4.1, 4.2) that are arranged spaced apart along the extent of the toothing bar (9) and are directed in the direction of the toothing bar (9), whereby the toothing (10) of the toothing bar (9) lies flush and without a gap against the toothing (5) of the core (3) and the toothing (10) of the toothing bar (9) that is up against the toothing (5) of the core (3) remains completely free of plastic (14);
    - opening the injection mould and removing the overmoulded piston (13).
EP11159927.0A 2010-03-29 2011-03-28 Method for producing a piston of a door drive Active EP2372065B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010003384.7A DE102010003384B4 (en) 2010-03-29 2010-03-29 Method for producing a piston of a door drive

Publications (3)

Publication Number Publication Date
EP2372065A2 EP2372065A2 (en) 2011-10-05
EP2372065A3 EP2372065A3 (en) 2014-08-27
EP2372065B1 true EP2372065B1 (en) 2016-08-17

Family

ID=44227985

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Application Number Title Priority Date Filing Date
EP11159927.0A Active EP2372065B1 (en) 2010-03-29 2011-03-28 Method for producing a piston of a door drive

Country Status (2)

Country Link
EP (1) EP2372065B1 (en)
DE (1) DE102010003384B4 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019076746A1 (en) 2017-10-16 2019-04-25 Gretsch-Unitas Gmbh Baubeschlaege Closing device for closing a door or window leaf

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2119384T3 (en) * 1994-01-19 1998-10-01 Gretsch Unitas Gmbh DOOR CLOSERS.
DE10259237B4 (en) 2002-12-17 2006-02-09 Geze Gmbh Drive for a wing of a door or a window
EP1705329A1 (en) 2005-03-24 2006-09-27 GEZE GmbH Drive for a wing of a door or window

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019076746A1 (en) 2017-10-16 2019-04-25 Gretsch-Unitas Gmbh Baubeschlaege Closing device for closing a door or window leaf
DE202018006612U1 (en) 2017-10-16 2021-07-05 Gretsch-Unitas GmbH Baubeschläge Closing device for closing a door or window sash

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EP2372065A2 (en) 2011-10-05
EP2372065A3 (en) 2014-08-27
DE102010003384A1 (en) 2011-09-29
DE102010003384B4 (en) 2016-12-01

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