WO2002100237A1 - Dishwashing machine with single-piece plastic door - Google Patents

Dishwashing machine with single-piece plastic door Download PDF

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Publication number
WO2002100237A1
WO2002100237A1 PCT/EP2002/005894 EP0205894W WO02100237A1 WO 2002100237 A1 WO2002100237 A1 WO 2002100237A1 EP 0205894 W EP0205894 W EP 0205894W WO 02100237 A1 WO02100237 A1 WO 02100237A1
Authority
WO
WIPO (PCT)
Prior art keywords
door
dishwashing machine
substantially opaque
machine according
piece
Prior art date
Application number
PCT/EP2002/005894
Other languages
French (fr)
Inventor
Michael Green
Mathias Tingström
Alexandre Barros Neves
Giovanni Comin
Original Assignee
Electrolux Home Products Corporation N.V.
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 Electrolux Home Products Corporation N.V. filed Critical Electrolux Home Products Corporation N.V.
Publication of WO2002100237A1 publication Critical patent/WO2002100237A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4251—Details of the casing
    • A47L15/4257—Details of the loading door
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1615—The materials being injected at different moulding stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/28—Tools, e.g. cutlery
    • B29L2031/286—Cutlery

Definitions

  • the present invention refers to a dishwashing machine provided with a front loading door that is made as a single piece of plastic material.
  • a dishwashing machine is made up as an assembly of functional units, each one of which is provided as a single-piece construction of plastic material.
  • These functional units of the machine also include at least a door adapted to close a corresponding front access aperture of the machine.
  • the front access or loading door comprises a substantially transparent window enabling the user to visually inspect the interior of the washing vessel of the machine.
  • a transparent, i.e. viewing window is made separately and is then assembled under interposition of appropriate sealing gaskets in correspondence of an aperture in the door, the overall structure of which turns however out as being undesirably complex, labour-intensive and, therefore, expensive to assemble.
  • a dishwashing machine equipped with a single-piece plastic door, which is not only simple and low-cost, but is also capable of enabling the user to visually inspect the interior of the washing vessel of the machine.
  • FIGS. 1 and 2 are a schematic perspective view of a dishwashing machine according to the present invention, with the front loading door thereof closed and open, respectively;
  • FIG. 3 is a partially cross-sectional and enlarged side view of the door of the dishwashing machine of Figure 1 ;
  • FIGS. 4 and 5 are cross-sectional, enlarged- scale views of the door illustrated in Figure 3, according to different embodiments thereof.
  • the dishwashing machine mainly comprises an outer casing 1 housing a washing vessel 2 that is accessible though a preferably front door 3.
  • the door 3 is made as a single component part in a single-piece construction of a plastic material, at least a portion 4 of which is substantially transparent, so as to enable the user to visually inspect the interior of the washing vessel 2 of the machine even when said door is closed, as shown in Figure 1.
  • said portion 4 of the door is manufactured by injection- moulding of such a thermoplastic material as for instance substantially clear, i.e. transparent methacrylate ester or polycarbonate.
  • the transparent portion 4 is subsequently inserted in a mould in which substantially opaque thermoplastic material, such as for instance opaque methacrylate or ABS, is then over-injected on to the same portion 4, in such a manner as to manufacture a single-piece door 3 comprising a substantially opaque load-bearing structure 5 provided with a preferably small-sized window 4.
  • substantially opaque thermoplastic material such as for instance opaque methacrylate or ABS
  • the opaque structure 5 may be first produced by injection-moulding, on which structure a substantially transparent portion 4 can then be overinjected.
  • said opaque structure 5 and said transparent window 4 may be produced at the same time, i.e. concurrently by a so-called dual- injection process.
  • ribs or furrows 7 may most advantageously perform a threefold function, i.e.:
  • the opaque portion 5 of the single-piece door assembly is manufactured with the use of a moulding technique available for the production of so-called "sandwich" structures.
  • the injection-moulding process is carried out using both a virgin, high-grade thermoplastic material (such as methacrylate or ABS) and low-cost compatible re-conditioned, i.e. recycled material (such as re-conditioned methacrylate or ABS) to which a foaming agent is added.
  • the noble material (indicated at 10 in Figure 4) arranges itself outwardly (e.g. with a layer of approx. 1 mm), thereby forming the outlining surfaces delimiting the door 3, whereas the core of the door structure is formed by the re-conditioned material (indicated at 1 1).
  • a single-piece door assembly 3 is obtained, which not only ensures convenient visibility of the interior of the machine through the window portion 4, but also substantially contributes in an advantageous manner, thanks also to the above-mentioned sandwich structure, to a reduced transmission and emission of noise from the interior of the machine into the surrounding ambient. Furthermore, the outer arrangement of the noble thermoplastic material 10 confers a pleasant aesthetical appeal to the whole single-piece door assembly 3.

Landscapes

  • Detergent Compositions (AREA)
  • Washing And Drying Of Tableware (AREA)

Abstract

The door (3) of the dishwashing machine is provided as a single component part in a single-piece construction of a thermoplastic material, a portion (4) of which is substantially transparent, so as to allow for full visibility of the interior of the washing vessel (2) of the machine even when said is closed.

Description

DISHWASHING MACHINE WITH SINGLE-PIECE PLASTIC
DOOR
DESCRIPTION
The present invention refers to a dishwashing machine provided with a front loading door that is made as a single piece of plastic material.
Known from the disclosure in for instance US-A-4 179 307 is a method in which a dishwashing machine is made up as an assembly of functional units, each one of which is provided as a single-piece construction of plastic material. These functional units of the machine also include at least a door adapted to close a corresponding front access aperture of the machine. Such a solution allows for considerable manufacturing economies to be obtained on an industrial scale.
Known in the art there are also dishwashing machines, in which the front access or loading door comprises a substantially transparent window enabling the user to visually inspect the interior of the washing vessel of the machine. Such a transparent, i.e. viewing window is made separately and is then assembled under interposition of appropriate sealing gaskets in correspondence of an aperture in the door, the overall structure of which turns however out as being undesirably complex, labour-intensive and, therefore, expensive to assemble.
It therefore is a main purpose of the present invention to provide a dishwashing machine equipped with a single-piece plastic door, which is capable of aggregating the advantages of the above-cited prior-art, while doing away with the drawbacks thereof.
More particularly, it is a purpose of the present invention to provide a dishwashing machine equipped with a single-piece plastic door, which is not only simple and low-cost, but is also capable of enabling the user to visually inspect the interior of the washing vessel of the machine.
According to the present invention, these and further aims are reached in a dishwashing machine with a single-piece plastic door embodying the characteristics as recited and defined in the appended claims.
Anyway, features and advantages of the present invention may be more readily understood from the description that is given below by way of non- limiting example with reference to the accompanying drawings, in which:
- Figures 1 and 2 are a schematic perspective view of a dishwashing machine according to the present invention, with the front loading door thereof closed and open, respectively;
- Figure 3 is a partially cross-sectional and enlarged side view of the door of the dishwashing machine of Figure 1 ;
- Figures 4 and 5 are cross-sectional, enlarged- scale views of the door illustrated in Figure 3, according to different embodiments thereof.
With references to the' Figures, the dishwashing machine mainly comprises an outer casing 1 housing a washing vessel 2 that is accessible though a preferably front door 3. The door 3 is made as a single component part in a single-piece construction of a plastic material, at least a portion 4 of which is substantially transparent, so as to enable the user to visually inspect the interior of the washing vessel 2 of the machine even when said door is closed, as shown in Figure 1.
In particular, said portion 4 of the door is manufactured by injection- moulding of such a thermoplastic material as for instance substantially clear, i.e. transparent methacrylate ester or polycarbonate.
The transparent portion 4 is subsequently inserted in a mould in which substantially opaque thermoplastic material, such as for instance opaque methacrylate or ABS, is then over-injected on to the same portion 4, in such a manner as to manufacture a single-piece door 3 comprising a substantially opaque load-bearing structure 5 provided with a preferably small-sized window 4.
As an alternative method (depending on and in accordance with the arrangement and the geometry or shape of the various component parts), it may be possible for the opaque structure 5 to be first produced by injection-moulding, on which structure a substantially transparent portion 4 can then be overinjected.
In a further alternative method, said opaque structure 5 and said transparent window 4 may be produced at the same time, i.e. concurrently by a so-called dual- injection process.
In an advantageous manner, one of the above cited component parts 4,
5 (preferably the opaque portion 5) can include, integral therewith, also a handle 6 (on the front or outside surface thereof) and/ or a series of substantially peripheral ribs or furrows 7 protruding from the inside surface of the door. Said ribs or furrows 7 may most advantageously perform a threefold function, i.e.:
- they ensure an adequate strength and rigidity to the entire access door assembly 3;
- they ensure an adequate pressure being exerted, when the door 3 is closed, against a sealing gasket 8 that is arranged in correspondence of the front border of the washing vessel 2; and
- they form, when the door 3 is opened, respective side sliding planes for supporting a dish-carrying rack 9, situated substantially at the same level, when being pulled out of the washing vessel.
In a preferred manner, the opaque portion 5 of the single-piece door assembly is manufactured with the use of a moulding technique available for the production of so-called "sandwich" structures. In other words, the injection-moulding process is carried out using both a virgin, high-grade thermoplastic material (such as methacrylate or ABS) and low-cost compatible re-conditioned, i.e. recycled material (such as re-conditioned methacrylate or ABS) to which a foaming agent is added.
Owing to the different fluidity of the materials used, during the moulding process the noble material (indicated at 10 in Figure 4) arranges itself outwardly (e.g. with a layer of approx. 1 mm), thereby forming the outlining surfaces delimiting the door 3, whereas the core of the door structure is formed by the re-conditioned material (indicated at 1 1).
Conclusively, a single-piece door assembly 3 is obtained, which not only ensures convenient visibility of the interior of the machine through the window portion 4, but also substantially contributes in an advantageous manner, thanks also to the above-mentioned sandwich structure, to a reduced transmission and emission of noise from the interior of the machine into the surrounding ambient. Furthermore, the outer arrangement of the noble thermoplastic material 10 confers a pleasant aesthetical appeal to the whole single-piece door assembly 3.
Similar considerations also apply to the variant that is illustrated schematically in Figure 5, in which the opaque portion 5 of the single- piece door design is manufactured through the use of a so-called air- moulding technique. In other words, the injection-moulding process is carried out under injection of nitrogen (which is then recovered) in the molten mass of thermoplastic material so as to create respective air pockets 12 determining the formation of the afore cited protruding ribs or furrows 7 and/or the afore cited handle 6, or the like.
It shall be appreciated that the above described dishwashing machine may be the subject of a number of modifications without departing from the scope of the present invention.

Claims

1. Dishwashing machine comprising an outer casing that houses a washing vessel accessible through a plastic door, characterized in that the door (3) is provided as a single component part in a single-piece construction, at least a portion (4) of which is substantially transparent, so as to allow for full visibility of the interior of the washing vessel (2) of the machine even when said door is closed, the remaining portion (5) of the door being substantially opaque.
2. Dishwashing machine according to claim 1, characterized in that said substantially transparent portion (4) of the door (3) is manufactured by injection-moulding of a thermoplastic material, such as substantially clear methacrylate or polycarbonate, and the remaining portion (5) of the door in manufactured with the use of substantially opaque thermoplastic material, such as methacrylate or ABS, overinjected on to said substantially transparent portion (4), so that a single-piece door (3) comprising a substantially opaque load-bearing structure (5) provided with a viewing window (4) is obtained.
3. Dishwashing machine according to claim 1, characterized in that said substantially opaque portion (5) of the door (3) is manufactured by injection-moulding of a thermoplastic material, such as substantially opaque methacrylate or ABS, and said substantially transparent portion (4) of the door in manufactured with the use of substantially clear thermoplastic material, such as methacrylate or polycarbonate, overinjected on to said substantially opaque portion (5), so that a single- piece door (3) comprising a substantially opaque load-bearing structure (5) provided with a viewing window (4) is obtained.
4. Dishwashing machine according to claim 1 , characterized in that said substantially transparent portion (4) and said substantially opaque portion (5) of the door (3) are manufactured by a moulding process implying dual injection of respective thermoplastic materials, so that a single-piece dbor (3) comprising a substantially opaque load-bearing structure (5) provided with a viewing window (4) is obtained.
5. Dishwashing machine according to claim 1 , characterized in that said substantially opaque portion (5) and/ or said substantially transparent portion (4) of the single-piece door (3) comprises at least a handle (6) provided integral therewith.
6. Dishwashing machine according to claim 1, characterized in that said substantially opaque portion (5) of the door (3) comprises, provided integral therewith, stiffening ribs or furrows (7) which protrude from the inside surface of the door.
7. Dishwashing machine according to claim 6, characterized in that said stiffening ribs or furrows (7) are adapted to exert a pressure, when the door (3) is closed, against a sealing gasket (8) that is arranged in correspondence of a front border of the washing vessel (2).
8. Dishwashing machine according to claim 6, characterized in that said stiffening ribs or furrows (7) are adapted to form, when the door (3) is opened, respective side sliding planes for supporting a dish-carrying rack (9) being pulled out of the washing vessel (2) in which it normally resides.
9. Dishwashing machine according to claim 1, characterized in that said substantially opaque portion (5) of the single-piece door (3) is manufactured to feature a "sandwich" structure formed by a noble thermoplastic material in correspondence of the outer surfaces (10) delimiting the door, as well as re-conditioned thermoplastic material, to which a foaming agent is added, at the core portion (11) of the same door.
10. Dishwashing machine according to claim 1, characterized in that said substantially opaque portion (5) of the single-piece door (3) is manufactured by an air-moulding process, in such a manner that air pockets are incorporated to form said ribs or furrows (7) and/ or said handle (6).
PCT/EP2002/005894 2001-06-13 2002-05-29 Dishwashing machine with single-piece plastic door WO2002100237A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN01A000043 2001-06-13
ITPN20010043 ITPN20010043A1 (en) 2001-06-13 2001-06-13 DISHWASHER WITH ONE-PIECE PLASTIC DOOR

Publications (1)

Publication Number Publication Date
WO2002100237A1 true WO2002100237A1 (en) 2002-12-19

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ID=11453282

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PCT/EP2002/005894 WO2002100237A1 (en) 2001-06-13 2002-05-29 Dishwashing machine with single-piece plastic door

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WO (1) WO2002100237A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1498538A1 (en) * 2003-07-14 2005-01-19 Gemtron Corporation An appliance door or lid
DE102005028335A1 (en) * 2005-06-18 2006-12-21 Premark Feg L.L.C., Wilmington Program-controlled dishwasher has controls including program selector and multifunction button allowing selected program to be started, hinged cover fitting over control panel with aperture allowing access to only multifunction button
ITTO20100445A1 (en) * 2010-05-27 2011-11-28 Indesit Co Spa METHOD OF MANUFACTURING PARTS OF HOUSEHOLD APPLIANCES AND APPLIANCES INCLUDING SUCH PARTS
ITBS20100107A1 (en) * 2010-06-17 2011-12-18 Sergio Zaglio DISHWASHER MACHINE
EP2543306A1 (en) * 2011-07-06 2013-01-09 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher with at least one translucent section on the inner wall of its door
EP2430966A3 (en) * 2010-07-16 2013-09-11 BSH Bosch und Siemens Hausgeräte GmbH Household appliance, in particular dishwasher
GB2552397A (en) * 2016-12-15 2018-01-24 Matthew Russell Iain Dishwasher spray arms
EP2994029B1 (en) 2013-05-07 2018-09-26 MEIKO Maschinenbau GmbH & Co. KG Cleaning apparatus with illuminated door handle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB941134A (en) * 1960-03-14 1963-11-06 Ass Elect Ind Improvements relating to domestic washing and like equipment
FR2606990A1 (en) * 1986-11-24 1988-05-27 Siltal Casa Spa Mini dishwasher
US4765697A (en) * 1987-08-03 1988-08-23 Whirlpool Corporation Dishwasher door with interlocking molded console and molded inner door
GB2237293A (en) * 1989-10-23 1991-05-01 Sviluppo Settori Impiego Srl Window for electrical household appliances
DE4240888A1 (en) * 1992-12-04 1994-06-09 Sichert Gmbh & Co Berthold Cover plate for washing machines etc - has support plate made of injection moulded plastics and joined to frame by locking components.
EP0680712A1 (en) * 1994-05-03 1995-11-08 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Improvement in a single-piece frame in a box-like construction
DE19514821A1 (en) * 1994-05-04 1995-11-09 Pvs Kunststofftechnik Ges Mit Household appliance has a work plate on top

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB941134A (en) * 1960-03-14 1963-11-06 Ass Elect Ind Improvements relating to domestic washing and like equipment
FR2606990A1 (en) * 1986-11-24 1988-05-27 Siltal Casa Spa Mini dishwasher
US4765697A (en) * 1987-08-03 1988-08-23 Whirlpool Corporation Dishwasher door with interlocking molded console and molded inner door
GB2237293A (en) * 1989-10-23 1991-05-01 Sviluppo Settori Impiego Srl Window for electrical household appliances
DE4240888A1 (en) * 1992-12-04 1994-06-09 Sichert Gmbh & Co Berthold Cover plate for washing machines etc - has support plate made of injection moulded plastics and joined to frame by locking components.
EP0680712A1 (en) * 1994-05-03 1995-11-08 ELECTROLUX ZANUSSI ELETTRODOMESTICI S.p.A. Improvement in a single-piece frame in a box-like construction
DE19514821A1 (en) * 1994-05-04 1995-11-09 Pvs Kunststofftechnik Ges Mit Household appliance has a work plate on top

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1498538A1 (en) * 2003-07-14 2005-01-19 Gemtron Corporation An appliance door or lid
DE102005028335A1 (en) * 2005-06-18 2006-12-21 Premark Feg L.L.C., Wilmington Program-controlled dishwasher has controls including program selector and multifunction button allowing selected program to be started, hinged cover fitting over control panel with aperture allowing access to only multifunction button
ITTO20100445A1 (en) * 2010-05-27 2011-11-28 Indesit Co Spa METHOD OF MANUFACTURING PARTS OF HOUSEHOLD APPLIANCES AND APPLIANCES INCLUDING SUCH PARTS
ITBS20100107A1 (en) * 2010-06-17 2011-12-18 Sergio Zaglio DISHWASHER MACHINE
WO2011158270A3 (en) * 2010-06-17 2012-08-02 Sergio Zaglio Dishwashing machine
TWI551258B (en) * 2010-06-17 2016-10-01 塞吉歐 列格李歐 Dishwashing machine
EP2430966A3 (en) * 2010-07-16 2013-09-11 BSH Bosch und Siemens Hausgeräte GmbH Household appliance, in particular dishwasher
EP2543306A1 (en) * 2011-07-06 2013-01-09 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher with at least one translucent section on the inner wall of its door
DE102011078765A1 (en) * 2011-07-06 2013-01-10 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher with at least one translucent portion on its Türinnenwandung
EP2994029B1 (en) 2013-05-07 2018-09-26 MEIKO Maschinenbau GmbH & Co. KG Cleaning apparatus with illuminated door handle
GB2552397A (en) * 2016-12-15 2018-01-24 Matthew Russell Iain Dishwasher spray arms
GB2552397B (en) * 2016-12-15 2018-10-10 Matthew Russell Iain Dishwasher spray arms

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