EP3092332A1 - A drum with improved mechanical strength and the production method thereof - Google Patents
A drum with improved mechanical strength and the production method thereofInfo
- Publication number
- EP3092332A1 EP3092332A1 EP14790636.6A EP14790636A EP3092332A1 EP 3092332 A1 EP3092332 A1 EP 3092332A1 EP 14790636 A EP14790636 A EP 14790636A EP 3092332 A1 EP3092332 A1 EP 3092332A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- strengthening element
- seam
- sheet metal
- present
- 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- Withdrawn
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
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
-
- 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
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
- D06F37/06—Ribs, lifters, or rubbing means forming part of the receptacle
Definitions
- the present invention relates to a drum that is suitable for using in laundry washing or washing-drying machines, and the production method thereof.
- a washing machine drum which comprises a cylindrical body shell and circular front and rear lids, the peripheries of which are connected to the cylindrical shell by means of a seam, and wherein the strength of the said seam is increased against centrifugal forces by being circumferentially stamped.
- the aim of the present invention is the realization of a drum, the mechanical strength of which is improved.
- the drum realized in order to attaint the aim of the present invention, explicated in the first claim and the respective claims thereof comprises a seam that is produced by bending a sheet metal cylindrically and overlapping two opposite peripheries thereof, a cylindrical body that is formed by the cylindrically-shaped sheet metal, and a curved step that remains between the portion of the body that is produced by crushing and expanding the body and the mouth portion the diameter of which does not change.
- the drum furthermore comprises a strengthening element that is disposed on the step so as to overlap with the seam.
- the strengthening element on the step is shaped as an impression that is formed by inwardly denting the cylindrical outer surface of the drum body by circumferentially applying pressure from outside by means of a pressure apparatus.
- the strengthening element on the step is shaped as an embossment that is formed by outwardly protruding the cylindrical inner surface of the drum body by circumferentially applying pressure from inside by means of a pressure apparatus.
- more than one strengthening element is arranged on the step at intervals.
- the step and hence the drum are strengthened along the periphery of the body.
- a rectangular sheet metal is bent into a cylinder and the peripheries that face one another are joined forming a seam and thus, the hollow cylindrical body of the drum is formed.
- the diameter of the body is increased by crushing and expanding the sheet metal.
- the seam is crushed and two edges of the sheet metal are permanently joined while the strengthening element is formed by circumferentially applying pressure onto the body from outside or inside by means of a pressure apparatus, for example a steel roller or disc.
- the drum is used in laundry washing machines.
- the drum is used in laundry washing-drying machines.
- Figure 1 – is the exploded view of a drum.
- Figure 2 – is the partial perspective view of a drum related to an embodiment of the present invention.
- Figure 3 – is the partial cross-sectional view of a drum related to an embodiment of the present invention.
- the drum (1) comprises a sheet metal (2), a cylindrical body (3) that is formed by bending the sheet metal (2) into a cylinder, a seam (4) that is produced by overlapping the opposite peripheries of the sheet metal (2) on the body (3), and a step (5) that is formed by expanding the body (3) so that the diameters of the open mouths thereof remain the same.
- the seam (4) is formed by bending the sheet metal (2) and joining the opposite peripheries thereof, the diameter of the body (3) is increased with the crushing process.
- the step (5) is formed between the middle portion of the body (3) with a relatively larger diameter and the mouth portion thereof, the diameter of which is not changed.
- the drum (1) of the present invention comprises a strengthening element (6) that is disposed on the step (5) so that at least some portion thereof is aligned with the seam (4) and that extends towards the center of the body (3) or in the reverse direction.
- the strengthening element (6) increases the surface area over the step (5), thus decreases the stress acting on the step (5).
- the strengthening element (6) is shaped as an impression which is formed by denting a strip ring-shaped narrow portion of the step (5) towards the inner area of the body (3) by circumferentially applying pressure from outside by means of a pressure apparatus, for example a steel roller or disc.
- the impression-shaped strengthening element (6) extends towards the inner region of the drum (1).
- the pressure apparatus crushes and smoothes the seam (4) apart from its function of forming the strengthening element (6).
- the apparatus gains the feature of forming the strengthening element (6), thus decreasing production costs.
- an additional production step is not required to form the strengthening element (6), since in the production step, wherein the seam (4) is smoothed, the strengthening element (6) is simultaneously formed.
- the strengthening element (6) is shaped as an embossment that is formed by protruding the step (5) towards the outside of the body (3) by circumferentially applying pressure from inside by means of a pressure apparatus.
- more than one strengthening element (6) is consecutively arranged along the circular line on the step (5).
- the force on the step (5) acts on a wider surface at more than one point by means of the strengthening element (6).
- the step (5) is crushed while the strengthening element (6) is formed, the dislocation density of the step (5) is increased at more than one point. Thus, a stronger structure is obtained.
- the strengthening element (6) is elliptical.
- the centrifugal force applied on the step (5) acts on a wider surface by means of the strengthening element (6), thereby decreasing deformation.
- the production method of the drum (1) consists of the following steps:
- the drum (1) is used in laundry washing machines.
- the drum (1) is used in laundry washing-drying machines.
- the strength of the body (3) is improved by increasing the dislocation density thereof thanks to the strengthening element (6) formed on the step (5).
- stretching and tearing are prevented from occurring on the step (5) due to the centrifugal force acting on the body (3) during the rotation of the drum (1).
- the laundry washer or dryer wherein the drum (1) is used is enabled to operate in a safer manner at the program steps that require high rotational speed.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
Description
- The present invention relates to a drum that is suitable for using in laundry washing or washing-drying machines, and the production method thereof.
- In laundry washing or washing-drying machines, laundry is loaded into a drum, the drum is rotated by means of an electric motor and washing, spin-drying and drying processes are realized. In the state of the art, for the production of the drum, a rectangular sheet metal is bent into a cylinder and the peripheries that face one another are joined forming a seam and thus, the hollow cylindrical body of the drum is formed. After the seam is formed, the diameter of the body is increased by crushing and expanding the sheet metal. After the expansion process, the seam is crushed and two sides of the sheet metal are permanently joined. However, after long term use, abrasions occur on the seam or in the vicinity of the seam due to the loads acting on the sheet metal, thus on the body.
- In the state of the art European Patent No. EP1520067, a washing machine drum is explained which comprises a cylindrical body shell and circular front and rear lids, the peripheries of which are connected to the cylindrical shell by means of a seam, and wherein the strength of the said seam is increased against centrifugal forces by being circumferentially stamped.
- The aim of the present invention is the realization of a drum, the mechanical strength of which is improved.
- The drum realized in order to attaint the aim of the present invention, explicated in the first claim and the respective claims thereof comprises a seam that is produced by bending a sheet metal cylindrically and overlapping two opposite peripheries thereof, a cylindrical body that is formed by the cylindrically-shaped sheet metal, and a curved step that remains between the portion of the body that is produced by crushing and expanding the body and the mouth portion the diameter of which does not change. The drum furthermore comprises a strengthening element that is disposed on the step so as to overlap with the seam.
- In an embodiment of the present invention, the strengthening element on the step is shaped as an impression that is formed by inwardly denting the cylindrical outer surface of the drum body by circumferentially applying pressure from outside by means of a pressure apparatus.
- In an embodiment of the present invention, the strengthening element on the step is shaped as an embossment that is formed by outwardly protruding the cylindrical inner surface of the drum body by circumferentially applying pressure from inside by means of a pressure apparatus.
- In an embodiment of the present invention, more than one strengthening element is arranged on the step at intervals. Thus, the step and hence the drum are strengthened along the periphery of the body.
- During the production of the drum, a rectangular sheet metal is bent into a cylinder and the peripheries that face one another are joined forming a seam and thus, the hollow cylindrical body of the drum is formed. After the seam is formed, the diameter of the body is increased by crushing and expanding the sheet metal. After the expansion process, the seam is crushed and two edges of the sheet metal are permanently joined while the strengthening element is formed by circumferentially applying pressure onto the body from outside or inside by means of a pressure apparatus, for example a steel roller or disc.
- In an embodiment of the present invention, the drum is used in laundry washing machines.
- In another embodiment of the present invention, the drum is used in laundry washing-drying machines.
- The drum realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
- Figure 1 – is the exploded view of a drum.
- Figure 2 – is the partial perspective view of a drum related to an embodiment of the present invention.
- Figure 3 – is the partial cross-sectional view of a drum related to an embodiment of the present invention.
- The elements illustrated in the figures are numbered as follows:
- Drum
- Sheet metal
- Body
- Seam
- Step
- Strengthening element
- The drum (1) comprises a sheet metal (2), a cylindrical body (3) that is formed by bending the sheet metal (2) into a cylinder, a seam (4) that is produced by overlapping the opposite peripheries of the sheet metal (2) on the body (3), and a step (5) that is formed by expanding the body (3) so that the diameters of the open mouths thereof remain the same. After the seam (4) is formed by bending the sheet metal (2) and joining the opposite peripheries thereof, the diameter of the body (3) is increased with the crushing process. Thus, the step (5) is formed between the middle portion of the body (3) with a relatively larger diameter and the mouth portion thereof, the diameter of which is not changed.
- The drum (1) of the present invention comprises a strengthening element (6) that is disposed on the step (5) so that at least some portion thereof is aligned with the seam (4) and that extends towards the center of the body (3) or in the reverse direction. By means of the strengthening element (6), the resistance to stretching and tearing of the sheet metal (2), the thickness of which decreases especially around the seam (4) while the diameter of the body (3) is expanded, is improved. The strengthening element (6) increases the surface area over the step (5), thus decreases the stress acting on the step (5).
- In an embodiment of the present invention, the strengthening element (6) is shaped as an impression which is formed by denting a strip ring-shaped narrow portion of the step (5) towards the inner area of the body (3) by circumferentially applying pressure from outside by means of a pressure apparatus, for example a steel roller or disc. The impression-shaped strengthening element (6) extends towards the inner region of the drum (1). The pressure apparatus crushes and smoothes the seam (4) apart from its function of forming the strengthening element (6). By a simple modification performed on the apparatus that is used to smooth the seam (4), the apparatus gains the feature of forming the strengthening element (6), thus decreasing production costs. Moreover, an additional production step is not required to form the strengthening element (6), since in the production step, wherein the seam (4) is smoothed, the strengthening element (6) is simultaneously formed.
- In an embodiment of the present invention, the strengthening element (6) is shaped as an embossment that is formed by protruding the step (5) towards the outside of the body (3) by circumferentially applying pressure from inside by means of a pressure apparatus.
- In an embodiment of the present invention, more than one strengthening element (6) is consecutively arranged along the circular line on the step (5). Thus, the force on the step (5) acts on a wider surface at more than one point by means of the strengthening element (6). Moreover, since the step (5) is crushed while the strengthening element (6) is formed, the dislocation density of the step (5) is increased at more than one point. Thus, a stronger structure is obtained.
- In an embodiment of the present invention, the strengthening element (6) is elliptical. Thus, the centrifugal force applied on the step (5) acts on a wider surface by means of the strengthening element (6), thereby decreasing deformation.
- In an embodiment of the present invention, the production method of the drum (1) consists of the following steps:
- - bending the sheet metal (2) to form the cylindrical body (3),
- - forming the seam (4),
- - forming the step (5) by expanding the body (3),
- - smoothing the seam (4) by means of the pressure apparatus and forming the strengthening element (6) simultaneously.
- In an embodiment of the present invention, the drum (1) is used in laundry washing machines.
- In another embodiment of the present invention, the drum (1) is used in laundry washing-drying machines.
- By means of the present invention, the strength of the body (3) is improved by increasing the dislocation density thereof thanks to the strengthening element (6) formed on the step (5). Thus, stretching and tearing are prevented from occurring on the step (5) due to the centrifugal force acting on the body (3) during the rotation of the drum (1). The laundry washer or dryer wherein the drum (1) is used is enabled to operate in a safer manner at the program steps that require high rotational speed.
Claims (8)
- A drum (1) comprising a sheet metal (2), a cylindrical body (3) that is formed by bending the sheet metal (2) into a cylinder, a seam (4) that is produced by overlapping the opposite peripheries of the sheet metal (2) on the body (3), and a step (5) that is formed by expanding the body (3) so that the diameters of the open mouths thereof remain the same, characterized by at least one strengthening element (6) that is disposed on the step (5) so that at least some portion thereof is aligned with the seam (4) and that extends towards the center of the body (3) or in the reverse direction.
- A drum (1) as in Claim 1, characterized by the strengthening element (6) that is shaped as an impression which is formed by denting the step (5) towards the inner area of the body (3) by circumferentially applying pressure from outside by means of a pressure apparatus.
- A drum (1) as in Claim 1, characterized by the strengthening element (6) that is shaped as an embossment which is formed by protruding the step (5) towards the outside of the body (3) by circumferentially applying pressure from inside by means of a pressure apparatus.
- A drum (1) as in any one of the above claims, characterized by more than one strengthening element (6) consecutively disposed along the circular line on the step (5).
- A drum (1) as in any one of the above claims, characterized by the elliptical strengthening element (6).
- A laundry washing machine characterized by a drum (1) as in Claim 1 or 2.
- A laundry washing-drying machine characterized by a drum (1) as in Claim 1 or 2.
- A production method for a drum (1) as in Claim 1, comprising the steps of:- bending the sheet metal (2) to form the cylindrical body (3),- forming the seam (4),- forming the step (5) by expanding the body (3),- smoothing the seam (4) by means of the pressure apparatus and forming the strengthening element (6) simultaneously.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR201315401 | 2013-12-27 | ||
PCT/EP2014/073335 WO2015096924A1 (en) | 2013-12-27 | 2014-10-30 | A drum with improved mechanical strength and the production method thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3092332A1 true EP3092332A1 (en) | 2016-11-16 |
Family
ID=51842541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14790636.6A Withdrawn EP3092332A1 (en) | 2013-12-27 | 2014-10-30 | A drum with improved mechanical strength and the production method thereof |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3092332A1 (en) |
WO (1) | WO2015096924A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021200986A1 (en) | 2021-02-03 | 2022-08-04 | BSH Hausgeräte GmbH | Method for producing a jacket wall for a laundry drum with a compensating embossing, jacket wall for a laundry drum, and laundry drum |
DE102021200987A1 (en) | 2021-02-03 | 2022-08-04 | BSH Hausgeräte GmbH | Method for producing a laundry drum with a precise positioning of an embossed structure and flood holes relative to one another, and laundry drum |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2214104B1 (en) | 2002-07-03 | 2005-12-16 | Bsh Electrodomesticos España, S.A. | WASHER DRUM. |
ES2296424B1 (en) * | 2004-02-06 | 2008-12-16 | Bsh Electrodomesticos España S.A. | REINFORCEMENT FOR WASHING MACHINE DRUM. |
EP1916327B1 (en) * | 2006-10-19 | 2011-03-23 | Electrolux Home Products Corporation N.V. | Tumble dryer |
IT1396539B1 (en) * | 2009-11-26 | 2012-12-14 | Qs Group S P A | PROCEDURE AND EQUIPMENT FOR THE CONSTRUCTION OF AN EXPANDED BASKET FOR WASHING MACHINES, WASHING MACHINES AND DRYERS. |
-
2014
- 2014-10-30 WO PCT/EP2014/073335 patent/WO2015096924A1/en active Application Filing
- 2014-10-30 EP EP14790636.6A patent/EP3092332A1/en not_active Withdrawn
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015096924A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2015096924A1 (en) | 2015-07-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20070214630A1 (en) | Method for manufacturing drum and washing machine using the drum | |
WO2015096924A1 (en) | A drum with improved mechanical strength and the production method thereof | |
KR20070048913A (en) | Method for manufacturing drum for drum washing machine and press therefor | |
US9054571B2 (en) | Method of manufacturing a rotor for an electric motor for a washing machine | |
US8365437B2 (en) | Drum for washer and dryer | |
EP0001645A2 (en) | Method of forming inwardly flanged curved members and/or inwardly flanged curved members, and application in laundry appliances | |
WO2009030638A1 (en) | A washer/dryer | |
EP2761074B1 (en) | A drum and the production method thereof | |
WO2011064201A1 (en) | Process and apparatus for manufacturing an expanded basket for washing machine or washer-drier or drier | |
EP3092333B1 (en) | A drum with improved mechanical strength and the production method thereof | |
WO2013030394A2 (en) | A laundry washing or laundry washing-drying machine drum | |
EP3092334B1 (en) | A drum with improved mechanical strength and the production method thereof | |
EP3899124B1 (en) | A laundry washer-dryer having a tub with improved mechanical strength | |
WO2018121941A1 (en) | A drum and its production method | |
EP1704274A1 (en) | A drum with stiffening corrugations along the seam | |
WO2012107282A2 (en) | Drum type front loading laundry treating machine | |
US20050204559A1 (en) | Expanded clamping band for washer | |
CN112853681B (en) | Drying control method for drum of drum washing machine | |
KR200190342Y1 (en) | Clutter fabric display roller | |
ITMI991611A1 (en) | HIGH SPEED CENTRIFUGAL BASKET FOR WASHING MACHINE BASKET FOR WASHING MACHINE PROVIDED WITH THE ABOVE CRUISE AND PROCEDURE P | |
WO2019132811A1 (en) | A washer-dryer comprising a flange | |
US8869427B2 (en) | Dryer | |
CN106544819A (en) | A kind of washing machine inner tub and production technology and washing machine | |
KR20060005825A (en) | Drum in the washer | |
WO2005106098A1 (en) | A washer / dryer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20160722 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20180323 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ARCELIK ANONIM SIRKETI |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20190622 |