EP3440253A1 - A laundry washer-dryer having a tub with improved mechanical strength - Google Patents

A laundry washer-dryer having a tub with improved mechanical strength

Info

Publication number
EP3440253A1
EP3440253A1 EP17719171.5A EP17719171A EP3440253A1 EP 3440253 A1 EP3440253 A1 EP 3440253A1 EP 17719171 A EP17719171 A EP 17719171A EP 3440253 A1 EP3440253 A1 EP 3440253A1
Authority
EP
European Patent Office
Prior art keywords
tub
rear wall
produced
dryer
hub
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.)
Withdrawn
Application number
EP17719171.5A
Other languages
German (de)
French (fr)
Inventor
Suat Oner ISIK
Mecid FILIZ
Ergin METIN
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.)
Arcelik AS
Original Assignee
Arcelik AS
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 Arcelik AS filed Critical Arcelik AS
Publication of EP3440253A1 publication Critical patent/EP3440253A1/en
Withdrawn legal-status Critical Current

Links

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
    • D06F37/261—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

Definitions

  • the present invention relates to a laundry washer-dryer having a tub produced from plastic material.
  • the tub is produced from thermoplastic material such as polyethylene (PE) or polypropylene (PP) due its high chemical resistance values and low costs.
  • PE polyethylene
  • PP polypropylene
  • the tub should be produced from materials with high mechanical strength such as fiber-reinforced plastic. All the regions of the tub are not subjected to the same amount of stress; however, due to the practice of plastic injection process, the whole or at least half of the tub should be produced from high strength, hence expensive, material, thus the material costs are increased.
  • the aim of the present invention is the realization of a laundry washer-dryer which comprises a tub with increased mechanical strength and decreased material costs.
  • the region around the hub bearing the drum shaft of the tub is the region of the tub which requires the highest mechanical strength, hence produced from a plastic material having higher mechanical strength than the plastic material used for producing the tub.
  • the remaining regions (the edge portion of the rear wall, the front wall and the side wall) of the tub except for the said region surrounding the hub are produced from low cost plastic material.
  • the region of the tub rear wall around the hub is produced by adding agents which increase mechanical strength such as fiberglass, ceramic fiber, etc. to polyethylene (PE) or polypropylene (PP) used for producing other regions of the tub.
  • PE polyethylene
  • PP polypropylene
  • the region of the tub rear wall around the hub is produced from polyamide (PA) or polyimide (PI) with increased mechanical strength without requiring an additives different from polyethylene (PE) or polypropylene (PP) used for producing other regions of the tub.
  • PA polyamide
  • PI polyimide
  • PE polyethylene
  • PP polypropylene
  • Figure 1 – is the schematic view of a laundry washer-dryer.
  • the laundry washer-dryer (1) comprises a drum (2) that is rotated around the horizontal axis by a motor (M) and wherein the laundry is placed, a shaft (3) that transmits the movement received from the motor (M) to the drum (2), and a tub (8) wherein the drum (2) moves, that is produced from plastic (rigid thermoplastic) and that has a circular front wall (4) with the laundry loading opening arranged at the center thereof, a cylindrical side wall (5), a circular rear wall (6) and a hub (7) that is arranged at the rear wall (6) and where the shaft (3) is borne.
  • plastic rigid thermoplastic
  • the laundry washer-dryer (1) of the present invention comprises a tub (8) having the rear wall (6) - that is at least partially produced from a plastic material with high mechanical strength and different chemical structure than the plastic material used for producing the front wall (4) or the side wall (5) or - that is at least partially produced by adding agents increasing mechanical strength to the plastic material used for producing the front wall (4) or the side wall (5).
  • the front wall (4) and the side wall (5) of the tub (8) are produced from plastic material such as polyethylene (PE) or polypropylene (PP). Additives decreasing costs such as calcium carbonate, talc, kaolin are added into the plastic raw material of the front wall (4) and the side wall (5).
  • the rear wall (6) of the tub (8) where the hub (7) bearing the shaft (3) is arranged is at least partially produced from a plastic material with high mechanical strength, thus the mechanical strength of the rear wall (6) is increased, providing dimensional stability and rigidness of the region around the hub (7).
  • only a part of the rear wall (6) is produced from a material with high mechanical strength instead of the whole tub (8), thus the material costs are decreased.
  • the circular region (B) of the rear wall (6) of the tub (8) surrounding the hub (7) and having a diameter smaller than the outer diameter of the rear wall (6) is produced from a plastic material with high mechanical strength.
  • the diameter of the circular region (B) of the tub (8) surrounding the hub (7) and produced from a plastic material with high mechanical strength is half the outer diameter of the rear wall (6).
  • the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced by adding fiberglass to polyethylene (PE) or polypropylene (PP).
  • the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced by adding ceramic fiber to polyethylene (PE) or polypropylene (PP).
  • the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced by adding asbestos fiber to polyethylene (PE) or polypropylene (PP).
  • the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced by adding mica fragments to polyethylene (PE) or polypropylene (PP).
  • the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced from polyamide (PA).
  • the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced from polyimide (PI).
  • the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced from polyacetal (also known as polyoxymethylene).
  • the rear wall (6) of the tub (8) of the laundry washer-dryer (1) of the present invention in particular the region of the rear wall (6) around the hub (7) bearing the shaft (3) is strengthened against mechanical stress.
  • High mechanical strength, hence expensive, plastic materials is used only regionally at the rear wall (6) of the tub (8) while other regions of the tub (8) are produced from low-cost plastic material, thus providing cost advantage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

The present invention relates to a laundry washer-dryer (1) comprising a drum (2) that is rotated around the horizontal axis by a motor (M) and wherein the laundry is placed, a shaft (3) that transmits the movement received from the motor (M) to the drum (2), and a tub (8) wherein the drum (2) moves, that is produced from rigid thermoplastic and that has a circular front wall (4) with the laundry loading opening arranged at the centre thereof, a cylindrical side wall (5), a circular rear wall (6) and a hub (7) that is arranged at the rear wall (6) and where the shaft (3) is borne. The rear wall (6) of the tub (8) is at least partially produced from a plastic material with high mechanical strength and different chemical structure than the plastic material used for producing the front wall (4) or the side wall (5). Alternatively the rear wall (6) of the tub (8) is at least partially produced by adding agents increasing mechanical strength to the plastic material used for producing the front wall (4) or the side wall (5).

Description

    A LAUNDRY WASHER-DRYER HAVING A TUB WITH IMPROVED MECHANICAL STRENGTH
  • The present invention relates to a laundry washer-dryer having a tub produced from plastic material.
  • In laundry washer-dryers, washing and drying processes are realized by placing the laundry into a drum moving in the tub. The tub is produced from thermoplastic material such as polyethylene (PE) or polypropylene (PP) due its high chemical resistance values and low costs. In the tub, especially the region around the hub wherein the shaft rotating the drum is borne is subjected to mechanical stress and risks of abrasion and cracking arise, therefore, the tub should be produced from materials with high mechanical strength such as fiber-reinforced plastic. All the regions of the tub are not subjected to the same amount of stress; however, due to the practice of plastic injection process, the whole or at least half of the tub should be produced from high strength, hence expensive, material, thus the material costs are increased.
  • In the United States Patent Application No. US2011283746, a washing machine having a tub with a structurally strengthened rear wall is disclosed.
  • In the European Patent Application No. EP2460924, a method for manufacturing a tub section for a washing machine is disclosed.
  • The aim of the present invention is the realization of a laundry washer-dryer which comprises a tub with increased mechanical strength and decreased material costs.
  • The laundry washer-dryer realized in order to attain the aim of the present invention is explicated in the claims.
  • The region around the hub bearing the drum shaft of the tub is the region of the tub which requires the highest mechanical strength, hence produced from a plastic material having higher mechanical strength than the plastic material used for producing the tub. The remaining regions (the edge portion of the rear wall, the front wall and the side wall) of the tub except for the said region surrounding the hub are produced from low cost plastic material. Thus, the need for producing the hole tub or the half thereof containing the rear wall from the high mechanical strength, hence expensive, plastic material is eliminated, thus providing cost advantage.
  • In an embodiment of the present invention, the region of the tub rear wall around the hub is produced by adding agents which increase mechanical strength such as fiberglass, ceramic fiber, etc. to polyethylene (PE) or polypropylene (PP) used for producing other regions of the tub.
  • In an embodiment of the present invention, the region of the tub rear wall around the hub is produced from polyamide (PA) or polyimide (PI) with increased mechanical strength without requiring an additives different from polyethylene (PE) or polypropylene (PP) used for producing other regions of the tub.
  • The laundry washer-dryer realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
  • Figure 1 – is the schematic view of a laundry washer-dryer.
  • The elements illustrated in the figures are numbered as follows:
  • 1 - Laundry washer-dryer
  • 2 - Drum
  • 3 - Shaft
  • 4 - Front wall
  • 5 - Side Wall
  • 6 - Rear wall
  • 7 - Hub
  • 8 - Tub
  • M: Motor
  • B: Circular region
  • The laundry washer-dryer (1) comprises a drum (2) that is rotated around the horizontal axis by a motor (M) and wherein the laundry is placed, a shaft (3) that transmits the movement received from the motor (M) to the drum (2), and a tub (8) wherein the drum (2) moves, that is produced from plastic (rigid thermoplastic) and that has a circular front wall (4) with the laundry loading opening arranged at the center thereof, a cylindrical side wall (5), a circular rear wall (6) and a hub (7) that is arranged at the rear wall (6) and where the shaft (3) is borne.
  • The laundry washer-dryer (1) of the present invention comprises a tub (8) having the rear wall (6)
    - that is at least partially produced from a plastic material with high mechanical strength and different chemical structure than the plastic material used for producing the front wall (4) or the side wall (5) or
    - that is at least partially produced by adding agents increasing mechanical strength to the plastic material used for producing the front wall (4) or the side wall (5).
  • In the laundry washer-dryer (1), the front wall (4) and the side wall (5) of the tub (8) are produced from plastic material such as polyethylene (PE) or polypropylene (PP). Additives decreasing costs such as calcium carbonate, talc, kaolin are added into the plastic raw material of the front wall (4) and the side wall (5). In the embodiment of the present invention, the rear wall (6) of the tub (8) where the hub (7) bearing the shaft (3) is arranged is at least partially produced from a plastic material with high mechanical strength, thus the mechanical strength of the rear wall (6) is increased, providing dimensional stability and rigidness of the region around the hub (7). Moreover, only a part of the rear wall (6) is produced from a material with high mechanical strength instead of the whole tub (8), thus the material costs are decreased.
  • In an embodiment of the present invention, the circular region (B) of the rear wall (6) of the tub (8) surrounding the hub (7) and having a diameter smaller than the outer diameter of the rear wall (6) is produced from a plastic material with high mechanical strength.
  • In this embodiment, the diameter of the circular region (B) of the tub (8) surrounding the hub (7) and produced from a plastic material with high mechanical strength is half the outer diameter of the rear wall (6).
  • In another embodiment of the present invention, the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced by adding fiberglass to polyethylene (PE) or polypropylene (PP).
  • In another embodiment of the present invention, the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced by adding ceramic fiber to polyethylene (PE) or polypropylene (PP).
  • In another embodiment of the present invention, the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced by adding asbestos fiber to polyethylene (PE) or polypropylene (PP).
  • In another embodiment of the present invention, the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced by adding mica fragments to polyethylene (PE) or polypropylene (PP).
  • In another embodiment of the present invention, the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced from polyamide (PA).
  • In another embodiment of the present invention, the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced from polyimide (PI).
  • In another embodiment of the present invention, the circular region (B) of the tub (8) rear wall (6) surrounding the hub (7) is produced from polyacetal (also known as polyoxymethylene).
  • The rear wall (6) of the tub (8) of the laundry washer-dryer (1) of the present invention, in particular the region of the rear wall (6) around the hub (7) bearing the shaft (3) is strengthened against mechanical stress. High mechanical strength, hence expensive, plastic materials is used only regionally at the rear wall (6) of the tub (8) while other regions of the tub (8) are produced from low-cost plastic material, thus providing cost advantage.

Claims (11)

  1. A laundry washer-dryer (1) comprising a drum (2) that is rotated around the horizontal axis by a motor (M) and wherein the laundry is placed, a shaft (3) that transmits the movement received from the motor (M) to the drum (2), and a tub (8) wherein the drum (2) moves, that is produced from plastic and that has a circular front wall (4) with the laundry loading opening arranged at the center thereof, a cylindrical side wall (5), a circular rear wall (6) and a hub (7) that is arranged at the rear wall (6) and where the shaft (3) is borne, characterized by the tub (8) having the rear wall (6) that is at least partially produced from a plastic material with high mechanical strength and different chemical structure than the plastic material used for producing the front wall (4) or the side wall (5) or that is at least partially produced by adding agents increasing mechanical strength to the plastic material used for producing the front wall (4) or the side wall (5).
  2. A laundry washer-dryer (1) as in Claim 1, characterized by the tub (8) wherein the circular region (B) of the rear wall (6) thereof surrounding the hub (7) and having a diameter smaller than the outer diameter of the rear wall (6) is produced from a plastic material with high mechanical strength.
  3. A laundry washer-dryer (1) as in Claim 2, characterized by the tub (8) wherein the diameter of the circular region (B) of the rear wall (6) thereof surrounding the hub (7) and produced from a plastic material with high mechanical strength is half the outer diameter of the rear wall (6).
  4. A laundry washer-dryer (1) as in Claim 2 or 3, characterized by the tub (8) wherein the circular region (B) of the rear wall (6) thereof surrounding the hub (7) is produced by adding fiberglass to polyethylene (PE) or polypropylene (PP).
  5. A laundry washer-dryer (1) as in Claim 2 or 3, characterized by the tub (8) wherein the circular region (B) of the rear wall (6) thereof surrounding the hub (7) is produced by adding ceramic fiber to polyethylene (PE) or polypropylene (PP).
  6. A laundry washer-dryer (1) as in Claim 2 or 3, characterized by the tub (8) wherein the circular region (B) of the rear wall (6) thereof surrounding the hub (7) is produced by adding asbestos fiber to polyethylene (PE) or polypropylene (PP).
  7. A laundry washer-dryer (1) as in Claim 2 or 3, characterized by the tub (8) wherein the circular region (B) of the rear wall (6) thereof surrounding the hub (7) is produced from polyamide (PA).
  8. A laundry washer-dryer (1) as in Claim 2 or 3, characterized by the tub (8) wherein the circular region (B) of the rear wall (6) thereof surrounding the hub (7) is produced from polyimide (PI).
  9. A laundry washer-dryer (1) as in Claim 2 or 3, characterized by the tub (8) wherein the circular region (B) of the rear wall (6) thereof surrounding the hub (7) is produced from polyacetal (polyoxymethylene).
  10. A laundry washer-dryer (1) as in Claim 1, characterized by the tub (8) wherein the front wall (4) and the side wall (5) thereof are produced from polyethylene (PE) or polypropylene (PP).
  11. A laundry washer-dryer (1) as in Claim 10, characterized by the tub (8) wherein additives such as calcium carbonate, talc and kaolin are added to the plastic raw material of the front wall (4) and the side wall (5).
EP17719171.5A 2016-04-04 2017-04-03 A laundry washer-dryer having a tub with improved mechanical strength Withdrawn EP3440253A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2016/04274A TR201604274A2 (en) 2016-04-04 2016-04-04 A WASHING WASHER-DRYER WITH MECHANICAL DURABILITY
PCT/EP2017/057827 WO2017174492A1 (en) 2016-04-04 2017-04-03 A laundry washer-dryer having a tub with improved mechanical strength

Publications (1)

Publication Number Publication Date
EP3440253A1 true EP3440253A1 (en) 2019-02-13

Family

ID=58632342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17719171.5A Withdrawn EP3440253A1 (en) 2016-04-04 2017-04-03 A laundry washer-dryer having a tub with improved mechanical strength

Country Status (3)

Country Link
EP (1) EP3440253A1 (en)
TR (1) TR201604274A2 (en)
WO (1) WO2017174492A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7997103B2 (en) 2002-12-10 2011-08-16 Lg Electronics Inc. Tub having structurally strengthened rear wall and washing machine with the same therein
DE10335972A1 (en) * 2003-08-06 2005-02-24 Bayer Aktiengesellschaft Lye container with support structure
DE10345848A1 (en) * 2003-09-30 2005-04-14 Wirthwein Ag Lye container for washing machines or dryers made of plastic
DE102007061526A1 (en) * 2007-12-20 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Plastic suds container for a washing machine or a washer-dryer and method for producing the suds container
ES2399674B1 (en) 2010-12-06 2014-03-27 BSH Electrodomésticos España S.A. Method of manufacturing a bowl section for a washing machine

Also Published As

Publication number Publication date
WO2017174492A1 (en) 2017-10-12
TR201604274A2 (en) 2017-10-23

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