US20070068199A1 - Suds container for a washing machine and method for making a suds container - Google Patents

Suds container for a washing machine and method for making a suds container Download PDF

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Publication number
US20070068199A1
US20070068199A1 US11/535,335 US53533506A US2007068199A1 US 20070068199 A1 US20070068199 A1 US 20070068199A1 US 53533506 A US53533506 A US 53533506A US 2007068199 A1 US2007068199 A1 US 2007068199A1
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US
United States
Prior art keywords
suds container
recited
hub unit
mold
bearing block
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.)
Abandoned
Application number
US11/535,335
Other languages
English (en)
Inventor
Udo Dahlmann
Wolfgang Hellhake
Ernst Kraemer
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Miele und Cie KG filed Critical Miele und Cie KG
Assigned to MIELE & CIE. KG reassignment MIELE & CIE. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRAEMER, ERNST, DAHLMANN, UDO, HELLHAKE, WOLFGANG
Publication of US20070068199A1 publication Critical patent/US20070068199A1/en
Abandoned legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D06F37/269—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for the bearing of the rotary receptacle
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
    • D06F37/262—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements made of plastic material, e.g. by injection moulding
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/264—Tubs provided with reinforcing structures, e.g. ribs, inserts, braces

Definitions

  • the invention relates to a suds container for a washing machine, including a cylindrical vessel that surrounds the drum, whereby a hub or a metallic bearing block having a hub to receive a drive shaft for the drum is integrated into a plastic compound in one of the front walls.
  • the invention also relates to a method for the production of such a suds container.
  • Suds containers made of plastic for washing machines are known, said containers being in the form of a cylindrical vessel that surrounds the drum.
  • a metallic bearing block with a hub to receive a drive shaft for the drum is integrated into the plastic compound in one of the front walls.
  • the encapsulation of the metallic bearing block by injection molding gives rise to considerable intrinsic stresses in the suds container resulting from the fact that the plastic cools off from the hardening temperature down to room temperature, shrinking in the process. Forces resulting from this exert such a strong effect on the bearing block that the component can become deformed in this process. This has a detrimental impact on the homogeneity of the suds container so that stress peaks can give rise to hairline cracks that are particularly responsible for greatly reducing the service life of a suds container created in this manner.
  • EP 1 528 136 A2 describes a suds container produced in this manner.
  • the metallic bearing block as a one-piece component, is placed into the injection mold, the block having centering shoulders so that it can be affixed at a precise angle as well as bearing shoulders to prevent it from tilting in the injection mold.
  • the bearing block is encapsulated in the mold by injection molding with an especially fiberglass-reinforced plastic in such a way that the metallic bearing block is embedded at least almost completely into the material of the front surface.
  • German utility model DE 1 918 222 U describes producing containers for washing machines and dishwashers and the use of a plastic with a fiberglass reinforcement to provide an elevated resistance against stress corrosion.
  • an object of the present invention is to provide a suds container for a washing machine, comprising an integrated bearing block that is improved in terms of its service life. It is another, alternative object of the present invention to provide a suitable method for the production of such a suds container.
  • the present invention provides a suds container for a washing machine.
  • the suds container includes: a cylindrical vessel configured to receive a drum of the washing machine, the cylindrical vessel including a cylindrical wall and a front wall; and a hub unit configured to receive a drive shaft for the drum, the hub unit being integrated into the front wall.
  • a fabric reinforcing mat is integrated in the front wall in an area thereof, the fabric mat at least partially covering the hub unit.
  • FIG. 1 a perspective depiction of a suds container
  • FIG. 2 a first embodiment of a metallic bearing block with reinforcement elements sketched in certain areas
  • FIG. 3 another embodiment of a bearing block with complete encapsulation of the reinforcement elements
  • FIG. 4 a schematic depiction of a reinforcement element
  • FIG. 5 a schematic depiction of a washing machine
  • FIG. 6 an embodiment of a hub with a reinforcement element arranged in certain areas
  • FIGS. 7 a , 7 b , 7 c a schematic depiction of an injection mold for the production of the suds container made of plastic.
  • fabric mats are additionally integrated as reinforcement elements into the plastic compound, at least in certain areas, especially where stress peaks are more likely to occur during the shrinkage process or during the operation of the washing machine.
  • the reinforcement elements consist of flat fabric mats that can be laid into the mold and that are arranged in the area of the metallic bearing block and/or the hub and that at least partially cover the bearing block and/or the hub. This creates a positive connection of the bearing block and/or of the hub to the front wall of the container.
  • the fabric mats in the area of the covered bearing block and/or of the hub are advantageous to configure with a contour that differs from the plane of the container wall so that the fabric mat in these areas corresponds to the contour or the shape of the bearing block and/or of the hub.
  • the fabric mat adapts to the bearing block and/or to the hub, thus improving the connection to the areas of the bearing block and/or of the hub that are to be covered.
  • the fabric mats are made of fiberglass-plastic fibers or fiberglass-plastic filaments. If high strength or a special extensibility is required, the fabric mats can be made of polyester fibers or polyester filaments, Kevlar fibers or Kevlar filaments, or carbon fibers or carbon filaments in alternative embodiments. A combination of fibers or filaments is likewise conceivable.
  • the at least one fabric mat is dimensioned in such a manner that it essentially surrounds or covers the entire area of the metallic bearing block.
  • the hub is at least partially covered since at least the area for the inserted bearing remains free.
  • the at least one fabric mat protrudes beyond the area of the front wall into the edge area of the cylindrical container wall.
  • the bearing block is connected over a large surface area, thus avoiding force peaks in the transition area between the fabric mat and the plastic compound.
  • the connection of the one front wall to the cylindrical container wall is reinforced, so that the entire suds container made of plastic is stabilized.
  • the invention provides a method for the production of a suds container made of plastic for a washing machine, comprising a cylindrical vessel that surrounds the drum, whereby a metallic bearing block having a hub to receive the drive shaft for the drum is integrated into the plastic compound in one of the front walls whereby, to start with, in a first step, a reinforcement element configured as a mat is laid into the injection mold, then, in a second step, the metallic bearing block is affixed in the injection mold and then, in a third step, the plastic compound is fed into the mold after the mold has been closed.
  • the present invention provides a method for the production of the suds container made of plastic, in which it is likewise proposed that, to start with, in a first step, a reinforcement element configured as a mat is laid around the metallic bearing block, then, in a second step, the metallic bearing block with the reinforcement element is affixed in the injection mold and then, in a third step, the plastic compound is fed into the mold after the mold has been closed. In this manner, the reinforcement element lies very tightly against the metallic bearing block, so that the reinforcement mat can perform its function here in the transition area where the main stresses occur.
  • the reinforcement element configured as a mat is placed into the mold in certain areas or onto the metallic bearing block.
  • the plastic compound is fed into the mold by means of a two-plastic technique.
  • a non-reinforced plastic compound which does not contain any fibers is placed or injected into the closed mold.
  • a reinforced plastic compound containing, for instance, fiberglass-plastic fibers, is placed into the mold.
  • the non-reinforced plastic compound reliably encapsulates the mats that have been laid into the mold and integrates them securely into the plastic compound.
  • the reinforced plastic compound introduced in the second step increases the stability and strength of the entire suds container made of plastic.
  • the fiber-reinforced plastic compound enhances the stability and strength of the areas with the fabric mats as well as of the areas without the fiber mats.
  • FIG. 1 shows a perspective depiction of a suds container 1 made of plastic for a washing machine, comprising a cylindrical vessel 2 surrounding the drum, whereby a metallic bearing block 4 having a hub 5 to receive a drive shaft for the drum is integrated into a plastic compound in one of the front walls 3 .
  • FIG. 5 shows by way of example a washing machine 11 , comprising a suds container 1 made of plastic with a drum 12 that can rotate inside said washing machine. On at least one end, the drum 12 has a drive shaft 13 that is mounted in the hub 5 of the bearing block 4 attached to the suds container 1 .
  • the bearing block 4 has been provided with fabric mats 6 configured as reinforcement elements, which are integrated into the plastic compound.
  • the essentially flat fabric mats 6 at least partially cover the bearing block 4 and/or some of the bearing block arms 8 .
  • the hub 5 is also at least partially covered by the fabric mats 6 .
  • the fabric mats 6 are configured in such a way that they follow the spatial contour of the bearing block 4 in the covered area and consequently they have a shape that differs from that of the container wall 3 .
  • the fabric mats 6 essentially correspond to the shape of the bearing block 4 and/or of the bearing block arms 8 and of the hub 5 .
  • the fabric mat 6 is oriented in a manner corresponding to the occurring stress lines 10 in order to ideally reinforce the area and to reduce partial material strains of the container wall 3 that might occur.
  • FIG. 3 especially shows an embodiment in which the entire area of the metallic bearing block 4 is encompassed or covered by at least one fabric mat 6 configured as a reinforcement element.
  • the fabric mat 6 has a shape that corresponds to that of the bearing block 4 , whereby only one area at the front of the hub 5 remains free.
  • the mat 6 can also be pressed as a flat component onto the contour of the bearing block 4 , as a result of which it acquires a shape that differs from that of the plane accordingly.
  • the at least one fabric mat 6 can be prefabricated as a molded part having the appropriate spatial shape, so that it corresponds to the contour of the bearing block 4 .
  • the fabric mat 6 is oriented in a manner corresponding to the occurring stress lines 10 .
  • the individual fibers 9 or filaments 9 of the fabric mat 6 are oriented in a manner corresponding to the occurring stress lines 10 .
  • the course of the filaments 9 essentially corresponds to the course of the stress lines 10 since the fabric mat 6 has its greatest resistance to strain in the alignment direction of the filaments 9 .
  • FIG. 6 depicts an embodiment of the invention in which a suds container 1 made of plastic having a cylindrical vessel 2 has a hub 5 a in a front wall 3 instead of a bearing block 4 .
  • This hub 5 a is at least partially covered with fabric mats 6 , whereby these fabric mats 6 extend into the flat area of the front wall 3 . It is also possible to lengthen the fabric mats 6 so that they project into the front wall 3 and into the edge area of the cylindrical vessel 2 , as a result of which the stability of the suds container 1 is further increased.
  • FIG. 7 a depicts an injection mold 14 in its open state.
  • a fabric mat 6 configured as reinforcement element 6 is laid into the injection mold and then, in a second step, the metallic bearing block 4 with the hub 5 is affixed in the injection mold 14 .
  • the inner part 15 is outside of the mold 14 .
  • FIG. 7 b shows the injection mold 14 in its closed state.
  • the plastic compound 17 is fed into the mold 14 as the third step.
  • the mold 14 has at least one feed line 16 through which the liquid or viscous plastic compound 17 is injected into the mold 14 .
  • a fabric mat 6 configured as a reinforcement element is laid around the metallic bearing block 4 , as shown in FIG. 2 or 3 , then, in a second step, the metallic bearing block 4 with the fabric mat 6 is affixed in the injection mold 14 , after which, in a third step, the plastic compound 17 is fed into the mold 14 once the mold has been closed.
  • FIG. 7 c depicts a mold 14 closed by the inner part 15 , with the mats 6 and the bearing block 4 laid into said mold 14 .
  • a plastic compound 17 without fibers is injected into the mold via the feed line 16 , as a result of which the mat 6 is integrated into the plastic compound 17 .
  • a fiber-reinforced plastic compound 17 a is introduced into the mold 14 via the feed line 16 a , as a result of which all of the components 4 , 6 placed into the mold 14 are thoroughly integrated into the fiber-reinforced plastic compound 17 a . It is also possible to introduce the fiber-reinforced plastic compound 17 a into the mold via the feed line 16 for the non-reinforced plastic compound 17 .
  • FIGS. 7 a , 7 b , 7 c only depict the positioning of the feed lines 16 , 16 a by way of example; alternative positions or a configuration with more feed lines 16 , 16 a are likewise possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
US11/535,335 2005-09-26 2006-09-26 Suds container for a washing machine and method for making a suds container Abandoned US20070068199A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005046010A DE102005046010B3 (de) 2005-09-26 2005-09-26 Kunststofflaugenbehälter für eine Waschmaschine und Verfahren zur Herstellung eines Kuststofflaugenbehälters
DE102005046010.0 2005-09-26

Publications (1)

Publication Number Publication Date
US20070068199A1 true US20070068199A1 (en) 2007-03-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
US11/535,335 Abandoned US20070068199A1 (en) 2005-09-26 2006-09-26 Suds container for a washing machine and method for making a suds container

Country Status (4)

Country Link
US (1) US20070068199A1 (de)
EP (1) EP1767686B1 (de)
AT (1) ATE412794T1 (de)
DE (2) DE102005046010B3 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070062225A1 (en) * 2005-09-21 2007-03-22 Miele & Cie. Kg Suds container for a washing machine and method for making a suds container
US20100186462A1 (en) * 2007-09-20 2010-07-29 BSH Bosch und Siemens Hausgeräte GmbH Plastic tub for a washing machine or a washer dryer
US20100192640A1 (en) * 2007-09-20 2010-08-05 BSH Bosch und Siemens Hausgeräte GmbH Plastic suds tub for a washing machine or a washer/dryer
US20100263224A1 (en) * 2007-12-20 2010-10-21 BSH Bosch und Siemens Hausgeräte GmbH Plastic liquor container for a washing machine or a clothes dryer, and method for the production of a liquor container
US20110113833A1 (en) * 2008-07-22 2011-05-19 BSH Bosch und Siemens Hausgeräte GmbH Method of manufacturing a tub section for a washing machine
WO2018171136A1 (en) * 2017-03-23 2018-09-27 Midea Group Co., Ltd. Tub for a laundry washing machine
US10326323B2 (en) 2015-12-11 2019-06-18 Whirlpool Corporation Multi-component rotor for an electric motor of an appliance
US10693336B2 (en) 2017-06-02 2020-06-23 Whirlpool Corporation Winding configuration electric motor
US10704180B2 (en) 2016-09-22 2020-07-07 Whirlpool Corporation Reinforcing cap for a tub rear wall of an appliance
US10975513B2 (en) 2017-03-23 2021-04-13 Midea Group Co., Ltd. Tub with bearing housing insert for a laundry washing machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2407431T3 (es) 2008-05-14 2013-06-12 Whirlpool Corporation Lavadora con un sistema de accionamiento directo
WO2017029416A1 (es) * 2015-08-19 2017-02-23 Teknia Montmelo, S.L. Conjunto tambor para lavadora
FR3097913B1 (fr) * 2019-06-27 2021-07-02 Valeo Equip Electr Moteur Palier plastique pour machine electrique tournante

Citations (8)

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Publication number Priority date Publication date Assignee Title
US3098582A (en) * 1959-06-19 1963-07-23 Smith Corp A O Fiber reinforced plastic vessel and method of making the same
US3293860A (en) * 1964-05-20 1966-12-27 Gen Motors Corp Filament wound container having reinforced opening
US3508677A (en) * 1968-08-20 1970-04-28 Whittaker Corp Vessel for storing high-pressure gases
US3655468A (en) * 1964-08-06 1972-04-11 Owens Corning Fiberglass Corp Fluid-handling constructions, apparatus and methods of production
US4012266A (en) * 1972-08-21 1977-03-15 Magee Donald L Method and apparatus for filament winding on a corrugated form to produce a cylindrical corrugated glass fiber part
US20020120978A1 (en) * 2000-09-27 2002-09-05 Moore Dan T. Protective helmet
US20050092034A1 (en) * 2003-10-29 2005-05-05 Matthias Hollenhorst Aggregate for a washing machine with a plastic sudsing container
US20070062225A1 (en) * 2005-09-21 2007-03-22 Miele & Cie. Kg Suds container for a washing machine and method for making a suds container

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Publication number Priority date Publication date Assignee Title
DE1918222U (de) * 1965-02-15 1965-06-24 Makus G M B H Behaelter fuer spuelfluessigkeit oder lauge fuer wasch- oder spuelmaschine.
DE8510620U1 (de) * 1985-04-11 1986-05-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Wäschepflegegerät, insbesondere Wäschetrockner oder Waschmaschine
ES2373781T3 (es) * 2003-10-29 2012-02-08 Miele & Cie. Kg Procedimiento para la producción de una unidad de lavado con una cubeta de lavado de plástico.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098582A (en) * 1959-06-19 1963-07-23 Smith Corp A O Fiber reinforced plastic vessel and method of making the same
US3293860A (en) * 1964-05-20 1966-12-27 Gen Motors Corp Filament wound container having reinforced opening
US3655468A (en) * 1964-08-06 1972-04-11 Owens Corning Fiberglass Corp Fluid-handling constructions, apparatus and methods of production
US3508677A (en) * 1968-08-20 1970-04-28 Whittaker Corp Vessel for storing high-pressure gases
US4012266A (en) * 1972-08-21 1977-03-15 Magee Donald L Method and apparatus for filament winding on a corrugated form to produce a cylindrical corrugated glass fiber part
US20020120978A1 (en) * 2000-09-27 2002-09-05 Moore Dan T. Protective helmet
US20050092034A1 (en) * 2003-10-29 2005-05-05 Matthias Hollenhorst Aggregate for a washing machine with a plastic sudsing container
US20070062225A1 (en) * 2005-09-21 2007-03-22 Miele & Cie. Kg Suds container for a washing machine and method for making a suds container

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070062225A1 (en) * 2005-09-21 2007-03-22 Miele & Cie. Kg Suds container for a washing machine and method for making a suds container
US7640771B2 (en) 2005-09-21 2010-01-05 Miele & Cie. Kg Suds container for a washing machine and method for making a suds container
US20100186462A1 (en) * 2007-09-20 2010-07-29 BSH Bosch und Siemens Hausgeräte GmbH Plastic tub for a washing machine or a washer dryer
US20100192640A1 (en) * 2007-09-20 2010-08-05 BSH Bosch und Siemens Hausgeräte GmbH Plastic suds tub for a washing machine or a washer/dryer
US8485002B2 (en) * 2007-09-20 2013-07-16 Bsh Bosch Und Siemens Hausgeraete Gmbh Plastic tub for a washing machine or a washer dryer
US8677789B2 (en) * 2007-09-20 2014-03-25 Bsh Bosch Und Siemens Hausgerate Gmbh Plastic suds tub for a washing machine or a washer/dryer
US9376767B2 (en) 2007-09-20 2016-06-28 BSH Hausgeräte GmbH Plastic tub for a washing machine or a washer dryer
US20100263224A1 (en) * 2007-12-20 2010-10-21 BSH Bosch und Siemens Hausgeräte GmbH Plastic liquor container for a washing machine or a clothes dryer, and method for the production of a liquor container
US8973412B2 (en) 2007-12-20 2015-03-10 Bsh Bosch Und Siemens Hausgeraete Gmbh Plastic liquor container for a washing machine or a clothes dryer, and method for the production of a liquor container
US20110113833A1 (en) * 2008-07-22 2011-05-19 BSH Bosch und Siemens Hausgeräte GmbH Method of manufacturing a tub section for a washing machine
US9212447B2 (en) * 2008-07-22 2015-12-15 BSH Bosch und Siemens Hausgeräte GmbH Tub section for a washing machine
US10326323B2 (en) 2015-12-11 2019-06-18 Whirlpool Corporation Multi-component rotor for an electric motor of an appliance
US10897167B2 (en) 2015-12-11 2021-01-19 Whirlpool Corporation Multi-component rotor for an electric motor of an appliance
US11374448B2 (en) 2015-12-11 2022-06-28 Whirlpool Corporation Multi-component rotor for an electric motor of an appliance
US11641138B2 (en) 2015-12-11 2023-05-02 Whirlpool Corporation Multi-component rotor for an electric motor of an appliance
US11909265B2 (en) 2015-12-11 2024-02-20 Whirlpool Corporation Multi-component rotor for an electric motor of an appliance
US10704180B2 (en) 2016-09-22 2020-07-07 Whirlpool Corporation Reinforcing cap for a tub rear wall of an appliance
US11473231B2 (en) 2016-09-22 2022-10-18 Whirlpool Corporation Reinforcing cap for a tub rear wall of an appliance
US12031260B2 (en) 2016-09-22 2024-07-09 Whirlpool Corporation Reinforcing cap for a tub rear wall of an appliance
WO2018171136A1 (en) * 2017-03-23 2018-09-27 Midea Group Co., Ltd. Tub for a laundry washing machine
US10487435B2 (en) 2017-03-23 2019-11-26 Midea Group Co., Ltd. Tub for a laundry washing machine
US10975513B2 (en) 2017-03-23 2021-04-13 Midea Group Co., Ltd. Tub with bearing housing insert for a laundry washing machine
US10693336B2 (en) 2017-06-02 2020-06-23 Whirlpool Corporation Winding configuration electric motor
US11482901B2 (en) 2017-06-02 2022-10-25 Whirlpool Corporation Winding configuration electric motor

Also Published As

Publication number Publication date
DE502006001930D1 (de) 2008-12-11
ATE412794T1 (de) 2008-11-15
DE102005046010B3 (de) 2006-10-12
EP1767686A1 (de) 2007-03-28
EP1767686B1 (de) 2008-10-29

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Owner name: MIELE & CIE. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DAHLMANN, UDO;HELLHAKE, WOLFGANG;KRAEMER, ERNST;REEL/FRAME:018486/0274;SIGNING DATES FROM 20060921 TO 20060922

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