EP2484265A2 - Method for manufacturing a dishwasher and dishwasher - Google Patents

Method for manufacturing a dishwasher and dishwasher Download PDF

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Publication number
EP2484265A2
EP2484265A2 EP12152276A EP12152276A EP2484265A2 EP 2484265 A2 EP2484265 A2 EP 2484265A2 EP 12152276 A EP12152276 A EP 12152276A EP 12152276 A EP12152276 A EP 12152276A EP 2484265 A2 EP2484265 A2 EP 2484265A2
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EP
European Patent Office
Prior art keywords
sealing
sealing bed
dishwasher
bed
liquid paint
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Granted
Application number
EP12152276A
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German (de)
French (fr)
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EP2484265A3 (en
EP2484265B1 (en
Inventor
Hans Gebauer
Peter Karl
Christian Noje
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP2484265A3 publication Critical patent/EP2484265A3/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00Washing or rinsing machines for crockery or tableware
    • A47L15/42Details
    • A47L15/4251Details of the casing
    • A47L15/4257Details of the loading door
    • A47L15/4263Door sealing arrangements

Definitions

  • the invention relates to a method for producing a dishwasher, in particular a domestic dishwasher, and a dishwasher with a at least partially encircling around a feed opening of the dishwasher door seal element, which is inserted into a sealing bed.
  • the washing compartment of a dishwasher can e.g. be made of a, the bottom, side and top walls forming, box-shaped container shell. Its rear side is e.g. closed with a serving as a rear wall sheet metal part.
  • a sealing bed for the door seal of the dishwasher can be formed in the front of the container shell.
  • the container shell is made with the integrated sealing bed of a high-quality CrNi steel sheet to avoid crevice corrosion within the sealing bed.
  • a dishwashing machine in which the door seal for the appliance door is inserted in a sealing bed made of sheet steel.
  • the sealing bed is formed as a separate from the washing tub frame part.
  • the frame part is connected by means of welded connection with the front side of the container jacket of the washing compartment.
  • the container shell of the washing is made of a cheaper Cr-steel.
  • the associated front frame part is made of high-grade CrNi steel.
  • the object of the invention is to provide a method for producing a dishwasher and a dishwasher, by which manufacturing technology easily and with reduced material and manufacturing costs corrosion resistance in the region of the sealing bed of the door seal for the door is achieved.
  • a liquid paint in particular an acrylic resin paint, is applied as a corrosion protection layer at least in a partial area of a surface of the sealing bed facing the door seal element, and the liquid paint is cured in a curing step.
  • the curing can be done for example by infrared drying using an infrared radiator.
  • infrared drying using an infrared radiator.
  • it is sufficient to treat the surface of the sealing bed which is in contact with the door sealing element and thus particularly susceptible to crevice corrosion with liquid paint.
  • sufficient corrosion protection can already be achieved by applying a liquid lacquer layer having a material thickness in a range of 1 to 5 ⁇ m, in particular 2 to 3 ⁇ m.
  • the required material usage is correspondingly low in order to achieve the necessary corrosion protection.
  • the sealing bed may be designed approximately groove-shaped in cross-section, with two lateral groove walls and a sealing base.
  • the corrosion protection can be applied at least to the sealing base, but preferably also to the two lateral groove walls.
  • the sealing bed can therefore be formed of the same material and / or in one piece with the container shell of the washing, in contrast to the above-mentioned prior art, wherein the formation of this component unit, the use of inexpensive Cr-steel is sufficient. Accordingly, it is entirely possible to dispense with the use of CrNi steel in the production of the washing container.
  • the sealing base and a groove side wall of the sealing bed which is in the direction of the device side, can be formed directly in the container casing of the washing container as an outwardly graduated form.
  • the inner groove wall of the sealing bed can in contrast be formed by a separate sheet metal strip, which is welded to the container casing of the washing. In such a construction, therefore, results between the sealing base and, formed by the metal strip inner groove wall a connecting joint or a capillary gap, in which moisture can collect disadvantageously.
  • the corrosion protection layer can cover in particular the open in the sealing bed interior joint.
  • a gap between the sheet metal part ends is to be understood with very small gap width. Due to the surface effects, which are very prominent in comparison to larger gap widths, the capillarity increasingly occurs in the capillary gap, in which the liquid lacquer, because of its surface tension, becomes caulked in the capillary gap and can no longer flow out until the curing has been completed.
  • the corrosion protection layer can, as already mentioned above, preferably be applied in liquid form as a special lacquer in the sealing bed.
  • the still liquid special coating can easily be incorporated by capillary action in the above-mentioned joint between the metal strip and the container shell. This ensures that the dense bed room is sealed corrosion-resistant.
  • the corrosion protection layer can in this case preferably be introduced by means of a spray initially in liquid form in the sealing bed.
  • a correct position application of the corrosion protection layer within the sealing bed is of great importance to avoid optically disadvantageous traces of the special paint outside of the sealing bed.
  • a so-called signature spray device which can spray the special paint into the sealing bed without fogging is suitable. Additional covering measures outside of the sealing bed are therefore not required.
  • the introduction of the special lacquer is preferably carried out by a robot-controlled marking spray gun. Subsequently, the applied special lacquer is dried by infrared drying.
  • the anticorrosive layer can also already be applied to the still planar jacket plate before the assembly or the shaping of the sealing bed or the rinsing container.
  • a screen printing process or also a Signiersprüh compiler is particularly suitable.
  • the in the assembled or gefomten state the sealing bed inside bounding sheet metal strips can be provided here at least in some areas with the corrosion protection layer.
  • Fig. 1 is a front door seal region of a dishwasher designed in the present embodiment as a domestic dishwasher shown.
  • the dishwasher has a washing container 1, which consists of a in the Fig. 3 Example shown planar cover plate 3 is made.
  • the jacket plate 3 is formed in a bending process so that a box-shaped container shell consisting of bottom, top and side walls arises.
  • the rear side of the container jacket is closed in the present embodiment by a sheet metal part serving as a rear wall.
  • the front side of the container casing forms a feed opening 5, which in a known manner is surrounded by a rubber-like door seal element 7.
  • the door seal member 7 is in Fig. 1 dotted in the undeformed state shown.
  • the front sheet metal part geometry of a lateral container wall 9 of the washing compartment 1 is shown, which has a groove-shaped sealing bed 6 into which the door sealing element 7 is inserted.
  • the container wall 9 to the front side out in the device side direction x stepped outward expression.
  • This forms a bent around a bending edge 11 to the outside sealing base 13 of the sealing bed 6, which merges via a further outer bending edge 15 in an outer, parallel to the container wall 9 groove wall 17 of the sealing bed 6.
  • the groove wall 17 is extended to the front side up to an outwardly angled front flange 19.
  • the groove side 21 inner groove wall 21 in the housing side direction is formed by a separate sheet metal strip 22, which is fixed to the inside of the container wall 9 by spot welding.
  • the door seal 7 is used, which is in the closed dishwasher in sealing contact with the dashed lines indicated inner door 23 of a door.
  • the container casing of the washing compartment 1 is also fastened on the front side on a circumferential front frame 25 in a known side.
  • both the rinsing container 1 and the step-shaped form integrally formed thereon in one piece and in one piece are made of a corrosion-susceptible, but less expensive Cr sheet steel.
  • this has Sealing bed 6 at its, the door seal 7 facing surface on a corrosion protection layer 27, which is applied as a liquid paint, such as an acrylic resin paint with a low material thickness in the range of 2 to 3 microns.
  • the corrosion protection layer 27 is in the Fig. 1 shown with exaggerated material thickness. As a result, the anticorrosive layer 27 covers both the lateral groove walls 17, 21 and the sealing base 13. As shown in FIG Fig.1 Furthermore, the particularly corrosion-prone joint 29 between the sealing base 13 and the groove wall 21 oriented at right angles thereto is also covered by the corrosion protection layer 27.
  • the corrosion protection layer 27 according to the invention can be introduced into the sealing bed 6 in different ways.
  • Fig. 2 Applies the corrosion protection layer 27 after the completion of the rinse tank 1 and the sealing bed 6.
  • a robot-guided Signiersprühpistole 31 is retracted with its entry nozzle in the sealing bed 6 and applied the liquid paint.
  • the liquid paint is subsequently dried in a curing step and cured.
  • a further variant for applying the corrosion protection layer 27 is shown, in contrast to Fig. 2 is already applied to the still planar jacket 3 prior to a shaping of the washing compartment 1 and thus the sealing bed 6.
  • the application of the corrosion protection layer 27 shown with cross-hatching takes place according to the Fig. 3 only in that, the sealing bed 6 forming region of the jacket plate 3.
  • the in the Fig. 3 still held as a separate component sheet metal strip 22, which also forms the groove wall 21 in the molded and assembled state, is also provided on its, in assembly position of the door seal 7 facing surface with the corrosion protection layer 27.

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  • Gasket Seals (AREA)

Abstract

The method involves inserting a door seal element (7) into a charging opening (5) of the dishwasher so as to arrange the door seal element on a sealing bed (6). The door seal element is made to face a corrosion protection layer (27) provided on sealing bed. The corrosion protection layer is made of liquid paint or acrylic resin lacquer. The thickness of the corrosion protection layer is 1-5 mu m or 2-3 mu m. An independent claim is included for dishwasher.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung einer Geschirrspülmaschine, insbesondere eine Haushaltsgeschirrspülmaschine, sowie eine Geschirrspülmaschine mit einem um eine Beschickungsöffnung der Geschirrspülmaschine wenigstens teilweise umlaufenden Türdichtungselement, das in ein Dichtbett eingesetzt wird.The invention relates to a method for producing a dishwasher, in particular a domestic dishwasher, and a dishwasher with a at least partially encircling around a feed opening of the dishwasher door seal element, which is inserted into a sealing bed.

Der Spülbehälter einer Geschirrspülmaschine kann z.B. aus einem, die Boden-, Seiten- und Deckwände bildenden, kastenförmigen Behältermantel ausgeführt sein. Dessen Rückseite wird z.B. mit einem als Rückwand dienenden Blechteil geschlossen. In der Vorderseite des Behältermantels kann demgegenüber ein Dichtbett für die Türdichtung der Geschirrspülmaschine eingeformt sein. Üblicherweise ist der Behältermantel mit dem darin integrierten Dichtbett aus einem hochwertigen CrNi-Stahlblech hergestellt, um innerhalb des Dichtbettes eine Spaltkorrosion zu vermeiden.The washing compartment of a dishwasher can e.g. be made of a, the bottom, side and top walls forming, box-shaped container shell. Its rear side is e.g. closed with a serving as a rear wall sheet metal part. In contrast, a sealing bed for the door seal of the dishwasher can be formed in the front of the container shell. Usually, the container shell is made with the integrated sealing bed of a high-quality CrNi steel sheet to avoid crevice corrosion within the sealing bed.

Aus der DE 10 2005 062 478 A1 ist eine Geschirrspülmaschine bekannt, bei der die Türdichtung für die Gerätetür in einem aus Stahlblech hergestellten Dichtbett eingesetzt ist. Gemäß diesem Stand der Technik ist das Dichtbett als ein vom Spülbehälter separates Rahmenteil ausgebildet. Das Rahmenteil ist mittels Schweißverbindung mit der Frontseite des Behältermantels des Spülbehälters verbunden. Zur Reduzierung der Materialkosten ist der Behältermantel des Spülbehälters aus einem kostengünstigeren Cr-Stahl hergestellt. Demgegenüber ist das damit verbundene frontseitige Rahmenteil aus hochwertigem CrNi-Stahl hergestellt.From the DE 10 2005 062 478 A1 a dishwashing machine is known in which the door seal for the appliance door is inserted in a sealing bed made of sheet steel. According to this prior art, the sealing bed is formed as a separate from the washing tub frame part. The frame part is connected by means of welded connection with the front side of the container jacket of the washing compartment. To reduce the cost of materials, the container shell of the washing is made of a cheaper Cr-steel. In contrast, the associated front frame part is made of high-grade CrNi steel.

Die in der obigen DE 10 2005 062 478 A1 gezeigte mehrteilige Ausführung des Spülbehälters bestehend aus dem Behältermantel und dem frontseitigen Rahmenteil, in dem das Dichtbett integriert ist, ist fertigungstechnisch aufwändig. Außerdem ist bei der Fertigung des Spülbehälters für das frontseitige Rahmenteil nach wie vor der Einsatz von kostspieligem CrNi-Stahl erforderlich, um eine Korrosionsbeständigkeit im Dichtbett der Türdichtung zu gewährleisten.The in the above DE 10 2005 062 478 A1 shown multi-part design of the washing container consisting of the container shell and the front frame part in which the sealing bed is integrated, is technically complex. In addition, the production of the washing container for the front frame part still requires the use of expensive stainless steel to ensure corrosion resistance in the sealing bed of the door seal.

Die Aufgabe der Erfindung besteht darin, ein Verfahren zur Herstellung einer Geschirrspülmaschine sowie eine Geschirrspülmaschine bereitzustellen, durch welche fertigungstechnisch einfach sowie mit reduzierten Material- und Fertigungskosten eine Korrosionsbeständigkeit im Bereich des Dichtbettes der Türdichtung für die Gerätetür erreicht wird.The object of the invention is to provide a method for producing a dishwasher and a dishwasher, by which manufacturing technology easily and with reduced material and manufacturing costs corrosion resistance in the region of the sealing bed of the door seal for the door is achieved.

Erfindungsgemäß ist vorgesehen, dass vor dem Einsetzen des Türdichtungselements in einem Auftragsschritt zumindest in einem Teilbereich einer dem Türdichtungselement zugewandten Oberfläche des Dichtbetts ein Flüssiglack, insbesondere ein Acrylharzlack, als Korrosionsschutzschicht aufgetragen wird und in einem Aushärteschritt der Flüssiglack ausgehärtet wird.According to the invention, prior to insertion of the door seal element in a coating step, a liquid paint, in particular an acrylic resin paint, is applied as a corrosion protection layer at least in a partial area of a surface of the sealing bed facing the door seal element, and the liquid paint is cured in a curing step.

Die Aushärtung kann beispielsweise durch Infrarottrocknung mittels eines Infrarotstrahlers erfolgen. Für den gewünschten Korrosionsschutz ist es ausreichend, die mit dem Türdichtungselement in Kontakt befindliche und damit gegenüber Spaltkorrosion besonders anfällige Oberfläche des Dichtbetts mit Flüssiglack zu behandeln. Dabei kann bereits durch das Auftragen einer Flüssiglackschicht mit einer Materialstärke in einem Bereich von 1 bis 5 µm, insbesondere 2 bis 3 µm, ein ausreichender Korrosionsschutz erreicht werden. Entsprechend gering ist der erforderliche Materialeinsatz, um den notwendigen Korrosionsschutz zu erreichen.The curing can be done for example by infrared drying using an infrared radiator. For the desired corrosion protection, it is sufficient to treat the surface of the sealing bed which is in contact with the door sealing element and thus particularly susceptible to crevice corrosion with liquid paint. In this case, sufficient corrosion protection can already be achieved by applying a liquid lacquer layer having a material thickness in a range of 1 to 5 μm, in particular 2 to 3 μm. The required material usage is correspondingly low in order to achieve the necessary corrosion protection.

Auf diese Weise kann bei der Herstellung des Dichtbettes auf den Einsatz von kostspieligem CrNi-Stahl gänzlich verzichtet werden und anstelle dessen ein kostengünstiger, jedoch korrosionsanfälliger Cr-Stahl verwendet werden. Vorzugsweise wird ausnahmslos nur der Oberflächenbereich des Dichtbetts mit dem Flüssiglack versehen, bei dem es tatsächlich zu einer Spaltkorrosion kommen kann. Die anderen Stahlblech-Bereiche des Dichtbetts verbleiben demgegenüber ohne die erfindungsgemäße Oberflächenbehandlung.In this way, the use of costly stainless steel can be completely dispensed with in the production of the sealing bed and instead a cost-effective, but susceptible to corrosion Cr steel can be used. Without exception, only the surface region of the sealing bed is provided with the liquid paint, in which crevice corrosion can actually occur. In contrast, the other steel sheet areas of the sealing bed remain without the surface treatment according to the invention.

Das Dichtbett kann im Querschnitt in etwa nutförmig gestaltet sein, und zwar mit zwei seitlichen Nutwänden und einem Dichtgrund. Zur Vermeidung von Spaltkorrosion kann der Korrosionsschutz zumindest auf den Dichtgrund, bevorzugt jedoch auch auf die beiden seitlichen Nutwände aufgebracht werden.The sealing bed may be designed approximately groove-shaped in cross-section, with two lateral groove walls and a sealing base. To prevent crevice corrosion, the corrosion protection can be applied at least to the sealing base, but preferably also to the two lateral groove walls.

Wie oben angegeben, ist es nicht mehr erforderlich, das Dichtbett aus kostspieligem, korrosionsfestem CrNi-Stahlblech herzustellen. Das Dichtbett kann daher im Unterschied zum oben angegebenen Stand der Technik materialeinheitlich und/oder einstückig mit dem Behältermantel des Spülbehälters ausgebildet werden, wobei zur Bildung dieser Bauteileinheit der Einsatz von kostengünstigem Cr-Stahl ausreichend ist. Entsprechend kann bei der Herstellung des Spülbehälters gänzlich auf den Einsatz von CrNi-Stahl verzichtet werden.As stated above, it is no longer necessary to produce the sealing bed from costly, corrosion-resistant CrNi steel sheet. The sealing bed can therefore be formed of the same material and / or in one piece with the container shell of the washing, in contrast to the above-mentioned prior art, wherein the formation of this component unit, the use of inexpensive Cr-steel is sufficient. Accordingly, it is entirely possible to dispense with the use of CrNi steel in the production of the washing container.

Der Dichtgrund und eine in Geräteseitenrichtung äußere Nutwand des Dichtbettes kann als eine nach außen abgestufte Ausprägung unmittelbar im Behältermantel des Spülbehälters ausgebildet werden. Die innere Nutwand des Dichtbettes kann demgegenüber durch eine separate Blechleiste ausgebildet sein, die mit dem Behältermantel des Spülbehälters verschweißt ist. Bei einer solchen Konstruktion ergibt sich daher zwischen dem Dichtgrund und der, durch die Blechleiste gebildeten inneren Nutwand eine Verbindungsfuge oder ein Kapillarspalt, in dem sich nachteilig Feuchtigkeit sammeln kann. Um hier die Gefahr von Spaltkorrosion zu vermeiden, kann die Korrosionsschutzschicht insbesondere die in den Dichtbett-Innenraum offene Verbindungsfuge überdecken.The sealing base and a groove side wall of the sealing bed, which is in the direction of the device side, can be formed directly in the container casing of the washing container as an outwardly graduated form. The inner groove wall of the sealing bed can in contrast be formed by a separate sheet metal strip, which is welded to the container casing of the washing. In such a construction, therefore, results between the sealing base and, formed by the metal strip inner groove wall a connecting joint or a capillary gap, in which moisture can collect disadvantageously. In order to avoid the risk of crevice corrosion here, the corrosion protection layer can cover in particular the open in the sealing bed interior joint.

Als Kapillarspalt im Sinne der Erfindung ist ein Spalt zwischen den Blechteilenden mit sehr geringer Spaltbreite zu verstehen. Durch die im Vergleich zu größeren Spaltbreiten stark im Vordergrund tretenden Oberflächeneffekte tritt im Kapillarspalt verstärkt die Kapillarität auf, bei der der Flüssiglack aufgrund seiner Oberflächenspannung sich im Kapillarspalt quasi verstemmt und nicht mehr herausfließen kann bis die Aushärtung abgeschlossen ist.As a capillary gap in the context of the invention, a gap between the sheet metal part ends is to be understood with very small gap width. Due to the surface effects, which are very prominent in comparison to larger gap widths, the capillarity increasingly occurs in the capillary gap, in which the liquid lacquer, because of its surface tension, becomes caulked in the capillary gap and can no longer flow out until the curing has been completed.

Die Korrosionsschutzschicht kann, wie bereits oben erwähnt, bevorzugt in flüssiger Form als ein Speziallack in dem Dichtbett appliziert werden. Der noch flüssige Speziallack kann dabei ohne weiteres durch Kapillarwirkung in die oben erwähnte Verbindungsfuge zwischen der Blechleiste und dem Behältermantel einfließen. Dadurch ist gewährleistet, dass der Dichtbettraum korrosionsfest versiegelt ist.The corrosion protection layer can, as already mentioned above, preferably be applied in liquid form as a special lacquer in the sealing bed. The still liquid special coating can easily be incorporated by capillary action in the above-mentioned joint between the metal strip and the container shell. This ensures that the dense bed room is sealed corrosion-resistant.

Im obigen Fall erfolgt das Applizieren der Korrosionsschutzschicht nach dem Zusammenbau bzw. der Formgebung des Dichtbettes. Die Korrosionsschutzschicht kann in diesem Fall bevorzugt mittels einer Sprüheinrichtung zunächst in flüssiger Form in das Dichtbett eingebracht werden. Hierbei ist ein lagerichtiges Aufbringen der Korrosionsschutzschicht innerhalb des Dichtbettes von großer Bedeutung, um optisch nachteilhafte Spuren des Speziallackes außerhalb des Dichtbettes zu vermeiden. Vor diesem Hintergrund eignet sich insbesondere eine sogenannte Signiersprüheinrichtung, die den Speziallack vernebelungsfrei in das Dichtbett einsprühen kann. Zusätzliche Abdeckmaßnahmen außerhalb des Dichtbettes sind daher nicht erforderlich. Das Einbringen des Speziallackes erfolgt bevorzugt durch eine robotergeführte Signiersprühpistole. Anschließend wird der aufgebrachte Speziallack durch Infrarottrocknung getrocknet.In the above case, the application of the anticorrosive layer takes place after assembly or molding of the sealing bed. The corrosion protection layer can in this case preferably be introduced by means of a spray initially in liquid form in the sealing bed. Here, a correct position application of the corrosion protection layer within the sealing bed is of great importance to avoid optically disadvantageous traces of the special paint outside of the sealing bed. Against this background, in particular, a so-called signature spray device which can spray the special paint into the sealing bed without fogging is suitable. Additional covering measures outside of the sealing bed are therefore not required. The introduction of the special lacquer is preferably carried out by a robot-controlled marking spray gun. Subsequently, the applied special lacquer is dried by infrared drying.

Alternativ dazu kann die Korrosionsschutzschicht auch bereits vor dem Zusammenbau bzw. der Formgebung des Dichtbetts bzw. des Spülbehälters bereits auf die noch ebenflächige Mantelplatine aufgebracht werden. Für ein lagerichtiges Aufbringen der Korrosionsschutzschicht eignet sich insbesondere ein Siebdruckverfahren oder ebenfalls ein Signiersprühverfahren. Der im zusammengebauten bzw. gefomten Zustand das Dichtbett innenseitig begrenzende Blechstreifen kann hierbei zumindest in Teilbereichen mit der Korrosionsschutzschicht versehen werden.As an alternative to this, the anticorrosive layer can also already be applied to the still planar jacket plate before the assembly or the shaping of the sealing bed or the rinsing container. For a correct position application of the corrosion protection layer is particularly suitable a screen printing process or also a Signiersprühverfahren. The in the assembled or gefomten state the sealing bed inside bounding sheet metal strips can be provided here at least in some areas with the corrosion protection layer.

Nachfolgend ist ein Ausführungsbeispiel der Erfindung anhand der beigefügten Figuren beschrieben.Hereinafter, an embodiment of the invention with reference to the accompanying figures will be described.

Es zeigen:

Fig. 1
in einer vergrößerten Schnittdarstellung den Türdichtungsbereich einer Geschirrspülmaschine;
Fig. 2
eine Ansicht entsprechend der Fig. 1, anhand der ein Verfahren zur Aufbringung der Korrosionsschutzschicht veranschaulicht ist; und
Fig. 3
einen Ausschnitt aus einer Mantelplatine sowie einer zugeordneten Blechleiste, auf der vor einer Formgebung auf den, das Dichtbett bildenden Bereich eine Korrosionsschutzschicht aufgetragen ist.
Show it:
Fig. 1
in an enlarged sectional view of the door seal region of a dishwasher;
Fig. 2
a view corresponding to the Fig. 1 , which illustrates a method of applying the anticorrosion layer; and
Fig. 3
a detail of a jacket plate and an associated metal strip on which a corrosion protection layer is applied to the forming the sealing bed area before shaping a.

In der Fig. 1 ist ein frontseitiger Türdichtungsbereich einer im vorliegenden Ausführungsbeispiel als Haushaltsgeschirrspülmaschine ausgebildeten Geschirrspülmaschine gezeigt. Die Geschirrspülmaschine weist einen Spülbehälter 1 auf, der aus einer in der Fig. 3 beispielhaft gezeigten ebenflächigen Mantelplatine 3 hergestellt ist. Die Mantelplatine 3 wird in einem Biegeprozess so geformt, dass ein kastenförmiger Behältermantel, bestehend aus Boden-, Deck- und Seitenwänden, entsteht.In the Fig. 1 is a front door seal region of a dishwasher designed in the present embodiment as a domestic dishwasher shown. The dishwasher has a washing container 1, which consists of a in the Fig. 3 Example shown planar cover plate 3 is made. The jacket plate 3 is formed in a bending process so that a box-shaped container shell consisting of bottom, top and side walls arises.

Die Rückseite des Behältermantels wird im vorliegenden Ausführungsbeispiel durch ein als Rückwand dienendes Blechteil verschlossen. Die Vorderseite des Behältermantels bildet demgegenüber eine Beschickungsöffnung 5, die in bekannter Weise von einem gummiartigen Türdichtungselement 7 umzogen ist. Das Türdichtungselement 7 ist in Fig. 1 gepunktet im unverformten Zustand dargestellt. In der Fig. 1 ist die frontseitige Blechteilgeometrie einer seitlichen Behälterwand 9 des Spülbehälters 1 gezeigt, die ein nutförmiges Dichtbett 6 aufweist, in welches das Türdichtungselement 7 eingesetzt ist.The rear side of the container jacket is closed in the present embodiment by a sheet metal part serving as a rear wall. In contrast, the front side of the container casing forms a feed opening 5, which in a known manner is surrounded by a rubber-like door seal element 7. The door seal member 7 is in Fig. 1 dotted in the undeformed state shown. In the Fig. 1 the front sheet metal part geometry of a lateral container wall 9 of the washing compartment 1 is shown, which has a groove-shaped sealing bed 6 into which the door sealing element 7 is inserted.

Zur Bildung des Dichtbetts 6 weist die Behälterwand 9 zur Frontseite hin eine in der Geräteseitenrichtung x nach außen abgestufte Ausprägung aus. Diese bildet einen um eine Biegekante 11 nach außen abgewinkelten Dichtgrund 13 des Dichtbettes 6, der über eine weitere äußere Biegekante 15 in eine äußere, zur Behälterwand 9 parallelen Nutwand 17 des Dichtbettes 6 übergeht. Die Nutwand 17 ist zur Frontseite hin bis zu einem nach außen abgewinkelten Frontflansch 19 verlängert.To form the sealing bed 6, the container wall 9 to the front side out in the device side direction x stepped outward expression. This forms a bent around a bending edge 11 to the outside sealing base 13 of the sealing bed 6, which merges via a further outer bending edge 15 in an outer, parallel to the container wall 9 groove wall 17 of the sealing bed 6. The groove wall 17 is extended to the front side up to an outwardly angled front flange 19.

Die in der Gehäuseseitenrichtung x innere Nutwand 21 wird durch eine separate Blechleiste 22 gebildet, die mittels Punktschweißung an der Innenseite der Behälterwand 9 festgelegt ist. Im so gebildeten nutförmigen Dichtbett 6 ist die Türdichtung 7 eingesetzt, die bei geschlossener Geschirrspülmaschine in Dichtkontakt mit der gestrichelt angedeuteten Innentür 23 einer Gerätetür ist. Der Behältermantel des Spülbehälters 1 ist außerdem in an sich bekannter Seite frontseitig an einem umlaufenden Frontrahmen 25 befestigt.The groove side 21 inner groove wall 21 in the housing side direction is formed by a separate sheet metal strip 22, which is fixed to the inside of the container wall 9 by spot welding. In the thus formed groove-shaped sealing bed 6, the door seal 7 is used, which is in the closed dishwasher in sealing contact with the dashed lines indicated inner door 23 of a door. The container casing of the washing compartment 1 is also fastened on the front side on a circumferential front frame 25 in a known side.

In dem, in der Fig. 1 gezeigten Ausführungsbeispiel ist sowohl der Spülbehälter 1 als auch die daran materialeinheitlich und einstückig angeformte stufenförmige Ausprägung aus einem korrosionsanfälligen, jedoch kostengünstigeren Cr-Stahlblech hergestellt. Um innerhalb des Dichtbettes 6 die Gefahr von Spaltkorrosion zu vermeiden, weist das Dichtbett 6 an seiner, der Türdichtung 7 zugewandten Oberfläche eine Korrosionsschutzschicht 27 auf, die als ein Flüssiglack, etwa einem Acrylharzlack mit geringer Materialstärke im Bereich von 2 bis 3µm aufgetragen ist.In that, in the Fig. 1 In the embodiment shown, both the rinsing container 1 and the step-shaped form integrally formed thereon in one piece and in one piece are made of a corrosion-susceptible, but less expensive Cr sheet steel. To avoid the risk of crevice corrosion within the sealing bed 6, this has Sealing bed 6 at its, the door seal 7 facing surface on a corrosion protection layer 27, which is applied as a liquid paint, such as an acrylic resin paint with a low material thickness in the range of 2 to 3 microns.

Die Korrosionsschutzschicht 27 ist in der Fig. 1 mit übertrieben großer Materialstärke dargestellt. Demzufolge überdeckt die Korrosionsschutzschicht 27 sowohl die seitlichen Nutwände 17, 21 als auch den Dichtgrund 13. Wie aus der Fig.1 weiter hervorgeht, ist auch die besonders korrosionsanfällige Verbindungsfuge 29 zwischen dem Dichtgrund 13 und der dazu rechtwinklig ausgerichteten Nutwand 21 ebenfalls von der Korrosionsschutzschicht 27 überdeckt.The corrosion protection layer 27 is in the Fig. 1 shown with exaggerated material thickness. As a result, the anticorrosive layer 27 covers both the lateral groove walls 17, 21 and the sealing base 13. As shown in FIG Fig.1 Furthermore, the particularly corrosion-prone joint 29 between the sealing base 13 and the groove wall 21 oriented at right angles thereto is also covered by the corrosion protection layer 27.

Die erfindungsgemäße Korrosionsschutzschicht 27 kann in unterschiedlicher Weise in das Dichtbett 6 eingebracht werden. Gemäß der Fig. 2 erfolgt das Applizieren der Korrosionsschutzschicht 27 nach der Fertigstellung des Spülbehälters 1 und des Dichtbetts 6. Dabei wird eine robotergeführte Signiersprühpistole 31 mit ihrer Eintragsdüse in das Dichtbett 6 eingefahren und der Flüssiglack aufgetragen. Der Flüssiglack wird darauffolgend in einem Aushärteschritt getrocknet und damit ausgehärtet.The corrosion protection layer 27 according to the invention can be introduced into the sealing bed 6 in different ways. According to the Fig. 2 Applies the corrosion protection layer 27 after the completion of the rinse tank 1 and the sealing bed 6. In this case, a robot-guided Signiersprühpistole 31 is retracted with its entry nozzle in the sealing bed 6 and applied the liquid paint. The liquid paint is subsequently dried in a curing step and cured.

Anhand der Fig. 3 ist eine weitere Variante zum Aufbringen der Korrosionsschutzschicht 27 gezeigt, die im Unterschied zur Fig. 2 bereits vor einer Formgebung des Spülbehälters 1 und damit des Dichtbetts 6 auf die noch ebenflächige Mantelplatine 3 aufgetragen wird. Das Aufbringen der mit Kreuzschraffur dargestellten Korrosionsschutzschicht 27 erfolgt dabei gemäß der Fig. 3 ausschließlich in dem, das Dichtbett 6 bildenden Bereich der Mantelplatine 3. Die in der Fig. 3 noch als separates Bauteil vorgehaltene Blechleiste 22, welche im geformten und zusammengebauten Zustand auch die Nutwand 21 bildet, wird an ihrer, in Zusammenbaulage der Türdichtung 7 zugewandten Oberfläche ebenfalls mit der Korrosionsschutzschicht 27 versehen. Erst nach Aufbringen der Korrosionsschutzschicht 27 wird der Biege- und Fügeprozess zur Herstellung des Spülbehälters 1 und damit auch des Dichtbetts 6 gestartet, bei dem zunächst die Mantelplatine 3 um die gestrichelt angedeuteten Biegeachsen zu einem Behältermantel gebogen wird und anschließend die stufenförmige Ausprägung in die Vorderseite des Behältermantels eingeformt wird.Based on Fig. 3 a further variant for applying the corrosion protection layer 27 is shown, in contrast to Fig. 2 is already applied to the still planar jacket 3 prior to a shaping of the washing compartment 1 and thus the sealing bed 6. The application of the corrosion protection layer 27 shown with cross-hatching takes place according to the Fig. 3 only in that, the sealing bed 6 forming region of the jacket plate 3. The in the Fig. 3 still held as a separate component sheet metal strip 22, which also forms the groove wall 21 in the molded and assembled state, is also provided on its, in assembly position of the door seal 7 facing surface with the corrosion protection layer 27. Only after application of the corrosion protection layer 27 of the bending and joining process for producing the washing container 1 and thus the sealing bed 6 is started, in which first the jacket plate 3 is bent around the dashed lines indicated bending axes to a container shell and then the stepped shape in the front of the Container shell is formed.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
Spülbehälterrinse tank
33
MantelplatineCoat board
55
Beschickungsöffnungloading port
77
TürdichtungselementDoor seal element
99
Behälterwandcontainer wall
1111
Biegekantebending edge
1313
Dichtgrundsealing base
1515
Biegekantebending edge
1717
äußere Nutwandouter groove wall
1919
Frontflanschfront flange
2121
innere Nutwandinner groove wall
2222
Blechleistesheet bar
2323
Innentürinterior door
2525
Frontrahmenfront frame
2727
KorrosionsschutzschichtCorrosion protection layer
2929
Verbindungsfuge bzw. KapillarspaltConnecting joint or capillary gap
3131
SigniersprühpistoleSigniersprühpistole
xx
GeräteseitenrichtungDevice side direction
yy
BautiefenrichtungBautiefenrichtung

Claims (13)

Verfahren zur Herstellung einer Geschirrspülmaschine, insbesondere einer Haushaltsgeschirrspülmaschine, mit einem um eine Beschickungsöffnung (5) der Geschirrspülmaschine wenigstens teilweise umlaufenden Türdichtungselement (7), das in ein Dichtbett (6) eingesetzt wird, dadurch gekennzeichnet, dass vor dem Einsetzen des Türdichtungselements (7) in einem Auftragsschritt zumindest in einem Teilbereich einer dem Türdichtungselement (7) zugewandten Oberfläche des Dichtbetts (7) ein Flüssiglack (27), insbesondere ein Acrylharzlack, als Korrosionsschutzschicht aufgetragen wird und in einem Aushärteschritt der Flüssiglack (27) ausgehärtet wird.Method for producing a dishwasher, in particular a domestic dishwasher, with a door seal element (7) at least partially encircling a feed opening (5) of the dishwasher, which is inserted into a sealing bed (6), characterized in that, prior to insertion of the door seal element (7) in a coating step, a liquid paint (27), in particular an acrylic resin paint, as a corrosion protection layer is applied at least in a partial region of the door sealing element (7) facing surface of the sealing bed (7) and cured in a curing step, the liquid paint (27). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass in einem Formgebungsschritt zumindest Teilbereiche des Dichtbetts (6), insbesondere zusammen mit zumindest einer Behälterwand (9) eines Spülbehälters, aus einer Mantelplatine (3) geformt werden.A method according to claim 1, characterized in that in a shaping step at least portions of the sealing bed (6), in particular together with at least one container wall (9) of a washing container, from a jacket plate (3) are formed. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Auftragsschritt und der Aushärteschritt zum Auftragen und Aushärten des Flüssiglacks (27) zeitlich vor dem Formgebungsschritt erfolgen, wobei der Flüssiglack (27) zumindest auf einen Teilbereich eines das Dichtbett (6) bildenden Bereichs der Mantelplatine (3) aufgetragen wird.A method according to claim 2, characterized in that the application step and the curing step for applying and curing the liquid paint (27) occur temporally before the forming step, wherein the liquid paint (27) at least a portion of the sealing bed (6) forming region of the jacket ( 3) is applied. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass der Auftragsschritt und der Aushärteschritt zeitlich nach dem Formgebungsschritt erfolgen.A method according to claim 2, characterized in that the application step and the curing step take place after the shaping step. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zur Ausbildung des Dichtbetts (6) eine Blechleiste (22) unter Bildung einer Verbindungsfuge oder eines Kapillarspalts (29) mit einer Behälterwand (9) eines Spülbehälters verbunden wird.Method according to one of the preceding claims, characterized in that for forming the sealing bed (6) a sheet metal strip (22) is connected to form a connecting joint or a capillary gap (29) with a container wall (9) of a washing container. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Dichtbett (6) zumindest teilweise, insbesondere vollständig, aus einem Cr-Stahlblech hergestellt wird.Method according to one of the preceding claims, characterized in that the sealing bed (6) is at least partially, in particular completely, made of a Cr-steel sheet. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Flüssiglack (27) mit einer Materialstärke im Bereich von 1 bis 5 µm, insbesondere 2 bis 3 µm, aufgetragen wird.Method according to one of the preceding claims, characterized in that the liquid paint (27) with a material thickness in the range of 1 to 5 microns, in particular 2 to 3 microns, is applied. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Dichtbett (6) nutförmig mit zwei Seitenwänden (17, 21) und einem Dichtgrund (13) ausgebildet ist, wobei zumindest auf den Dichtgrund (13) Flüssiglack (27) aufgetragen wird.Method according to one of the preceding claims, characterized in that the sealing bed (6) is groove-shaped with two side walls (17, 21) and a sealing base (13), wherein at least on the sealing base (13) liquid paint (27) is applied. Verfahren nach Anspruch 8 unter Rückbeziehung auf Anspruch 5, dadurch gekennzeichnet, dass der Dichtgrund (13) und eine in Geräteseitenrichtung (x) äußere Nutwand (17) des Dichtbetts (6) als eine nach außen abgestufte Ausprägung in Behälterwand (9) ausgebildet wird und eine innere Nutwand (21) des Dichtbetts (6) durch die mit der Behälterwand (9) verbundene separate Blechleiste (22) gebildet wird.Method according to claim 8 with reference back to claim 5, characterized in that the sealing base (13) and an outer groove wall (17) of the sealing bed (6) in the device side direction (x) are formed as an outwardly graduated form in the container wall (9) and an inner groove wall (21) of the sealing bed (6) is formed by the separate sheet metal strip (22) connected to the container wall (9). Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass der Flüssiglack (27) unter Ausnutzung von Kapillarkräften in den Kapillarspalt (29) eingebracht wird und im Kapillarspalt (29) ausgehärtet wird.A method according to claim 8 or 9, characterized in that the liquid paint (27) is introduced by utilizing capillary forces in the capillary gap (29) and is cured in the capillary gap (29). Geschirrspülmaschine, insbesondere hergestellt nach einem Verfahren nach einem der vorhergehenden Ansprüche, mit einer von einer Gerätetür (23) verschließbaren Beschickungsöffnung (5), die zumindest teilweise von einem Türdichtungselement (7) umzogen ist, die in einem Dichtbett (6) eingesetzt ist, dadurch gekennzeichnet, dass auf der dem Türdichtungselement (7) zugewandten Seite des Dichtbetts (6) zumindest in Teilbereichen ein ausgehärteter Flüssiglack (27), insbesondere ein Acrylharzlack, als Korrosionsschutzschicht aufgetragen ist.Dishwasher, in particular produced by a method according to any one of the preceding claims, having one of an appliance door (23) closable charging opening (5) which at least partly by a door sealing element (7) is moved, which is inserted in a sealing bed (6), characterized characterized in that on the door seal element (7) facing side of the sealing bed (6) at least in some areas a cured liquid paint (27), in particular an acrylic resin paint, is applied as a corrosion protection layer. Geschirrspülmaschine nach Anspruch 11, dadurch gekennzeichnet, dass das Dichtbett (6) nutförmig mit zwei Seitenwänden (17, 21) und einem Dichtgrund (13) ausgebildet ist, wobei zumindest auf den Dichtgrund (13) Flüssiglack (27) aufgetragen wird.Dishwasher according to claim 11, characterized in that the sealing bed (6) is groove-shaped with two side walls (17, 21) and a sealing base (13), wherein at least on the sealing base (13) liquid paint (27) is applied. Geschirrspülmaschine nach einem der Ansprüche 11 oder 12, dadurch gekennzeichnet, dass das Dichtbett eine Verbindungsfuge oder einen Kapillarspalt (29) aufweist, wobei zumindest im Bereich der Verbindungsfuge oder des Kapillarspalts (29) Flüssiglack aufgetragen ist.Dishwasher according to one of claims 11 or 12, characterized in that the sealing bed has a connecting joint or a capillary gap (29), wherein at least in the region of the connecting joint or the capillary gap (29) liquid paint is applied.
EP12152276.7A 2011-02-08 2012-01-24 Method for manufacturing a dishwasher and dishwasher Active EP2484265B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2486841A3 (en) * 2011-02-14 2017-06-14 BSH Hausgeräte GmbH Dishwasher and method for producing a wash tub of a dishwasher
FR3075585A1 (en) * 2017-12-21 2019-06-28 Groupe Brandt DISHWASHER WITH SEAL BETWEEN THE WASHING TANK AND THE FACADE DOOR
CN111032409A (en) * 2017-09-07 2020-04-17 罗伯特·博世有限公司 Tank with an inner container and an outer casing and method for manufacturing a tank

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DE102005062478A1 (en) 2005-12-27 2007-07-05 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher used in the household comprises a frame part made from a corrosion-resistant steel formed on the front end of a container hood

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Publication number Priority date Publication date Assignee Title
DE4303570C2 (en) * 1993-02-08 1997-03-20 Fraunhofer Ges Forschung Process for the production of functional coatings, coated substrates and coating material
DE10156422B4 (en) * 2001-11-16 2004-01-08 BSH Bosch und Siemens Hausgeräte GmbH Process for sealing sealing channels

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005062478A1 (en) 2005-12-27 2007-07-05 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher used in the household comprises a frame part made from a corrosion-resistant steel formed on the front end of a container hood

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2486841A3 (en) * 2011-02-14 2017-06-14 BSH Hausgeräte GmbH Dishwasher and method for producing a wash tub of a dishwasher
CN111032409A (en) * 2017-09-07 2020-04-17 罗伯特·博世有限公司 Tank with an inner container and an outer casing and method for manufacturing a tank
FR3075585A1 (en) * 2017-12-21 2019-06-28 Groupe Brandt DISHWASHER WITH SEAL BETWEEN THE WASHING TANK AND THE FACADE DOOR

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