US20080245114A1 - Laundry treating apparatus and method of manufacturing a front cover for a laundry treating apparatus - Google Patents

Laundry treating apparatus and method of manufacturing a front cover for a laundry treating apparatus Download PDF

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Publication number
US20080245114A1
US20080245114A1 US12/042,617 US4261708A US2008245114A1 US 20080245114 A1 US20080245114 A1 US 20080245114A1 US 4261708 A US4261708 A US 4261708A US 2008245114 A1 US2008245114 A1 US 2008245114A1
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US
United States
Prior art keywords
conducting
residual stress
side surfaces
front cover
spring back
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
US12/042,617
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English (en)
Inventor
Dong Woo Kang
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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
Priority claimed from KR1020080002966A external-priority patent/KR101467756B1/ko
Priority claimed from KR20080002963A external-priority patent/KR101490238B1/ko
Priority claimed from KR1020080002965A external-priority patent/KR101467755B1/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANG, DONG WOO
Publication of US20080245114A1 publication Critical patent/US20080245114A1/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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/12—Casings; Tubs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • a laundry treating apparatus and a method of manufacturing a front cover for a laundry treating apparatus are disclosed herein.
  • Laundry treating apparatuses are known. However, they suffer from various disadvantages.
  • FIG. 1 is an exploded perspective view illustrating an assembling process for a laundry treating apparatus according to an embodiment
  • FIG. 2 is a table illustrating properties of stainless steel that belongs to STS 300;
  • FIG. 3 is a perspective view illustrating a sample piece fabricated with stainless steel
  • FIG. 4 is a graph illustrating degrees of spring back for the samples of FIG. 3 ;
  • FIG. 5 is a flow chart of a method of manufacturing a front cover for a laundry treating apparatus according to an embodiment
  • FIG. 6 is a perspective view of a stainless steel plate having a door opening formed therein;
  • FIG. 7 is a perspective view of the stainless steel plate of FIG. 6 after a drawing process
  • FIG. 8 is a perspective view illustrating a stepped portion formed along a circumference of the stainless steel plate of FIGS. 6-7 ;
  • FIG. 9 is a perspective view of the stainless steel plate of FIGS. 6-8 formed with an area for various accessories to be secured thereto;
  • FIG. 10 is a front perspective view of a front cover manufactured using the method of manufacturing according to embodiments disclosed herein;
  • FIG. 11 is a rear perspective view of the front cover of FIG. 10 ;
  • FIG. 12 is a perspective view illustrating a washer to which the front cover of FIG. 10 is secured.
  • FIG. 1 is a diagram of a method of manufacturing a drum type washer 10 , wherein a control panel 6 is mounted on a front cover 2 thereof.
  • a tub (not shown) is mounted between side surfaces 4 , and a front cover 2 is coupled to the side surfaces 4 to define a front surface of the drum type washer 10 .
  • a control panel 6 is mounted in a recess part 3 formed in an upper portion of the front cover 2 . That is, in the assembly process shown in FIG. 1 , the front cover 2 is installed first and the auxiliary control panel 6 mounted thereto.
  • a detergent box 7 is retractable through an opening 8 formed in the control panel 6 .
  • the front cover is generally formed of steel. After molding the front cover in an appropriate shape, a coating process is performed to prevent corrosion. As a result, after the steel molding process, the additional coating process must be performed.
  • the front cover for a laundry treating apparatus may be manufactured using an anti-corrosive material having a unique metal color and gloss.
  • stainless steel may be selected as this material.
  • FIG. 2 is a table illustrating properties of this STS series of stainless steel, specifically, properties of STS 304, STS 304L, and STS 304J1.
  • the STS 200 series of stainless steel was drawn and sample pieces made, as shown in FIG. 3 , to examine the degrees of spring back of the sample pieces.
  • the graph shown in FIG. 4 was made and the results analyzed.
  • the spring back of STS 304J1 stainless steel was the smallest in the STS series of stainless steel, and thus, was selected.
  • FIG. 5 is a flow chart of a method of manufacturing a front cover according to an embodiment.
  • the method of manufacturing a front cover may include a drawing step S 510 to mold a front surface and at least one side surface of the front cover, a spring back reducing step S 530 to reduce a spring back of the drawn stainless plate, and a cutting step S 550 to cut the stainless plate.
  • the method of manufacturing according to embodiments disclosed herein provides a way to manufacture a front cover using stainless steel having a unique metal color and gloss.
  • the drawing process may be performed only one time to manufacture the front cover and it may include a process to reduce the spring back of the stainless steel created after the drawing process.
  • a worker may form a door opening 130 in the stainless plate 100 for a door to be coupled to the door opening 130 .
  • the door opening 130 may be formed at a center of the stainless plate 100 .
  • a worker may chamfer corners of the rectangular stainless plate 100 to prevent injuries to workers in the following processes and to facilitate the manufacturing processes.
  • the stainless plate 100 shown in FIG. 6 may be manufactured.
  • the side surfaces 126 and 127 include an upper surface 127 and a lower surface (not shown) formed at upper and lower portions of the front surface 125 , as well as a side surface 126 formed at both side portions of the front surface 125 , as viewed from the front of the front surface 125 .
  • the side surface 126 may be formed in a conventional size of a washer, for example, a depth of more than ⁇ 2 cm and a length of more than ⁇ 40 cm.
  • a recessed part 124 may be formed at the door opening 130 to receive and hold the door therein.
  • the recessed part 124 may be formed in the drawing step S 520 .
  • the recessed part 124 may be formed along an outer circumference of the door opening 130 , together when forming the front surface 125 and the side surfaces 126 and 127 of the front cover 120 .
  • the drawing step to mold the front cover according to this embodiment may be performed one time, due to the severe work hardening of the stainless steel as discussed above. Since the work hardening of the stainless steel may be more severe after repeated drawing processes, the drawing may be performed only one time to mold a desired shape.
  • Stainless steel has a unique metal color and gloss, but it also has a spring back phenomenon. Because of this characteristic of stainless steel, it is difficult to manufacture a desired shaped in stainless steel. That is, as discussed above, a desired shape of stainless steel should be molded in one drawing process because of the work hardening and the spring back reduced.
  • a stress in a longitudinal direction of the side surfaces 126 and 127 in other words, a stress in a vertical direction of the front surface 125 is the dominant of the two stresses acting in two different directions between the connection portions 200 and 300 .
  • the first connection portion 200 is bent between the front surface 125 and the side surfaces 126 and 127 .
  • the second connection portion 300 is bent between the side surfaces 126 and 127 and the plate edge portions.
  • the word “dominant” means that the stress acting in the longitudinal direction of the side surfaces 126 and 127 is at least approximately twice as large as the stress acting in the other direction, for example, a stress in a width direction of the side surfaces 126 and 127 .
  • the drawing process may be performed when molding a curvy shape and spring back generated by stresses acting in different directions at the bent portions. It is difficult to reduce spring back in the drawing process, compared with molding a simple linear shape.
  • there may be a bent portion between the side surface 126 and the upper side surface 127 and a bent portion between the side surface 126 and the lower side surface (not shown) and complex stresses may be activated at the bent portions of the side surfaces 126 and 127 .
  • complex stresses may be activated nearer to the bent portions between the side surface 126 and the upper surface 127 and between the side surface 126 and the lower surface (not shown).
  • the stress acting in a longitudinal direction of the side surfaces 126 and 127 is dominant over the other stresses acting in different directions of the bent portions, in particular, one of the stresses acting in a width direction of the side surfaces 126 and 127 . That is, the stress in a longitudinal direction of the side surface 126 and 127 is at least twice as large as the stress in a width direction of the side surface 126 and 127 . If the stress in a longitudinal direction is dominant, the complex stress is not activated and the spring back reduced. That is, only the stress acting in the longitudinal direction of the side surfaces 126 and 127 out of the plurality of stresses acting at the bent portions is remaining as a main stress and the spring back may be reduced.
  • the side surfaces 126 and 127 may be expanded by a predetermined length. That is, the stress in the longitudinal direction may be made dominant over the other stresses by expanding the side surfaces 126 and 127 a predetermined length.
  • a predetermined force may be applied to expand the length of the side surfaces 126 and 127 .
  • the plate edge portion 101 moves toward the side surfaces 126 and 127 .
  • the expansion of the side surfaces 126 and 127 is not performed as much as desired.
  • the plate edge portion 101 corresponding to the side surface 126 and 127 may also be expanded. That is, both side surfaces 126 and 127 and corresponding plate edge portions 101 with respect to the second connection portion 300 may be expanded, respectively, without moving material of the plate 400 with respect to the second connection portion 300 bent between the side surfaces 126 and 127 and the plate 400 .
  • a worker may fix the plate edge portion 101 and apply a predetermined force (F) to the second connection portion 300 bent between the side surfaces 126 and 127 and the plate 400 .
  • the predetermined force may be applied using, for example, a die specifically configured to provide an appropriate amount of force to expand or elongate the side surfaces 126 and 127 and the corresponding plate edge portion 101 an appropriate amount in an appropriate direction.
  • the side surfaces 126 and 127 and the corresponding plate edge portions 101 may be expanded in an arrow direction with respect to the second connection portion 300 by the force (F) acting at the second connection portion 300 and the plate edge portion 101 may be fixed not to move toward the second connection portion 300 .
  • At least one stepped portion 210 may be formed along the plate edge portion 101 to prevent the plate edge portion 101 from moving toward the bent second connection portion 300 securely.
  • the stepped portion 210 may be formed along the plate edge portion 101 a predetermined length.
  • the side surfaces 126 and 127 and the plate edge portions 101 may be expanded in both opposite directions with respect to the second connection portion 300 to reduce the spring back.
  • FIG. 9 illustrates a plate in which each area for each element is formed.
  • the panel opening 140 may be formed above the door opening 130 and the control panel (not shown) mounted in the control panel opening 140 .
  • a service hole 192 may be formed below the door opening 130 and the service hole covet (not shown) mounted in the service hole 192 .
  • a service person may perform a maintenance and repair job inside the washer through the service hole 192 .
  • a coupling part 133 may be formed at the recess part 124 of the door opening 130 .
  • a worker cuts a front cover 120 , as shown in FIG. 10 , from the stainless steel plate 100 , in step S 550 .
  • a worker may cut along the second connection portion 300 connected between the side surfaces 126 and 127 and the plate edge portion 101 and a worker may cut a large enough portion to form the flange parts 226 , 227 and 228 , as shown in FIG. 11 . That is, the cut front cover 120 should have a large enough section in a predetermined length to form the flange parts 226 , 227 , and 228 along edges of the side surfaces 126 and 127 .
  • the flange parts 226 , 227 , and 228 may not be continuously formed from each other but separately formed, as shown in FIG. 11 , although the flange parts 226 , 227 and 228 may be continuously formed from the side surfaces 126 and 127 .
  • the worker may form flanges by bending the flange parts 226 , 227 and 228 .
  • the front cover 120 may be coupled to the cabinet of the washer using the flanges.
  • FIGS. 10 and 11 are a front perspective view and a rear perspective view of a front cover 120 manufactured using the above discussed method of manufacturing.
  • the front cover 120 manufactured using the method of manufacturing according to embodiments disclosed herein may include a front surface 125 and a side surface 126 continuously formed from the front surface 125 .
  • the front cover 120 may further include an upper surface 126 and a lower surface (not shown) formed from the front surface 125 and the side surface 126 .
  • Reference numeral 182 shown in FIG. 10 is a detergent box opening for receiving a detergent box (not shown) installed therein.
  • the detergent box (not shown) may be retractable through the detergent box opening 182 .
  • flange parts may be formed at edges of the side surface 126 , the upper surface 127 and the lower surface (not shown), respectively.
  • a side flange part 226 , an upper flange part 227 , and a lower flange 228 may be separately formed.
  • a plurality of coupling holes 230 may be formed at the side flange part 226 , the upper flange part 227 , and the lower flange part 228 , respectively.
  • a plurality of coupling holes (not shown) corresponding to the coupling holes of the flange parts may be formed in the cabinet (not shown).
  • FIG. 12 is a perspective view illustrating a washer having the front cover 120 manufactured using the method of manufacturing according to embodiments disclosed herein secured thereto.
  • the door opening 130 to couple the door and the panel opening 140 may be formed in the front cover 125 of the front cover. Together with the door opening 130 and the panel opening 140 , a service hole 192 may be formed in the front surface 125 .
  • a control panel may be mounted to the front cover and a door coupled to the front cover manufactured using the method of manufacturing according to embodiments disclosed herein. That is, it is efficient to assemble the front cover according to embodiments disclosed herein, because the front cover having the control panel mounted therein may be a single module.
  • Embodiments disclosed herein provide a method of manufacturing a front cover for a laundry treating apparatus capable of being manufactured easily by reducing the necessary processes. Embodiments disclosed herein further provide a method of manufacturing a front cover for a laundry treating apparatus that manufactures a front cover having an accurate desired shape using stainless steel having a unique metal color and gloss.
  • Embodiments disclosed herein provide a method of manufacturing a front cover for a laundry treating apparatus that includes a drawing step to mold a front surface and a side surface of the front cover by drawing a stainless steel plate, a spring back reducing step to reduce a spring back of the drawn stainless steel plate, and a cutting step to cut the front cover from the stainless steel plate.
  • the manufacturing method according to embodiments may further include a step to form a door opening in the stainless steel plate, prior to the drawing step.
  • a recessed part may be further molded at an outer circumference of the door opening in the drawing step.
  • the front surface, the side surface, and the recessed part formed at the outer circumference of the door opening may be drawn at the same time.
  • a spring back of the side surface may be reduced in the spring back reducing step.
  • the side surface may have a predetermined depth of more than ⁇ 2 cm and a length of more than ⁇ 40 cm.
  • a stress in a longitudinal direction of the side surface out of stresses acting in more than two directions of the side surface may be dominant over a stress in a width direction.
  • the side surface may be expanded.
  • a plate edge portion corresponding to the side surface may be expanded outward, together with the expansion of the side surface. If the side surface and the plate edge portion are expanded, both portions with respect to a bent portion between the side surface and the plate may be expanded. In such a case, at least one stepped portion may be formed along the plate edge portion corresponding to the side surface.
  • the plate In the cutting step, the plate may be cut to form a flange area at the side surface.
  • the method may further include a flange part forming step to form a flange part at the side surface.
  • Embodiments disclosed herein further provide a laundry treating apparatus including a front cover manufactured by the method of manufacturing disclosed herein.
  • the front cover may include a front surface and at least one side surface continuously formed from the front surface.
  • the front cover may include a pair of side surfaces continuously formed from the front surface.
  • the front cover may further include an upper surface and a lower surface that are continuously formed from the front surface and the pair of the side surfaces.
  • flange parts having a predetermined length may be formed at the upper surface, the pair of the side surfaces, and the lower surface, respectively. Further, each of the flange parts may be separately formed.
  • any reference in this specification to “one embodiment,” “an embodiment,” “example embodiment,” etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention.
  • the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Coating With Molten Metal (AREA)
US12/042,617 2007-03-06 2008-03-05 Laundry treating apparatus and method of manufacturing a front cover for a laundry treating apparatus Abandoned US20080245114A1 (en)

Applications Claiming Priority (18)

Application Number Priority Date Filing Date Title
KR10-2007-0021921 2007-03-06
KR20070021920 2007-03-06
KR20070021924 2007-03-06
KR10-2007-0021925 2007-03-06
KR20070021922 2007-03-06
KR10-2007-0021924 2007-03-06
KR10-2007-0021920 2007-03-06
KR10-2007-0021922 2007-03-06
KR10-2007-0021923 2007-03-06
KR20070021925 2007-03-06
KR20070021921 2007-03-06
KR20070021923 2007-03-06
KR1020080002966A KR101467756B1 (ko) 2007-03-06 2008-01-10 의류처리장치
KR10-2008-0002966 2008-01-10
KR10-2008-0002965 2008-01-10
KR20080002963A KR101490238B1 (ko) 2007-03-06 2008-01-10 의류처리장치
KR10-2008-0002963 2008-01-10
KR1020080002965A KR101467755B1 (ko) 2007-03-06 2008-01-10 의류처리장치의 전면커버 제작방법

Publications (1)

Publication Number Publication Date
US20080245114A1 true US20080245114A1 (en) 2008-10-09

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Family Applications (4)

Application Number Title Priority Date Filing Date
US12/042,617 Abandoned US20080245114A1 (en) 2007-03-06 2008-03-05 Laundry treating apparatus and method of manufacturing a front cover for a laundry treating apparatus
US12/042,611 Abandoned US20080265721A1 (en) 2007-03-06 2008-03-05 Laundry treating apparatus
US12/042,603 Abandoned US20080235935A1 (en) 2007-03-06 2008-03-05 Laundry treating apparatus
US13/788,333 Active US8690268B2 (en) 2007-03-06 2013-03-07 Laundry treating apparatus

Family Applications After (3)

Application Number Title Priority Date Filing Date
US12/042,611 Abandoned US20080265721A1 (en) 2007-03-06 2008-03-05 Laundry treating apparatus
US12/042,603 Abandoned US20080235935A1 (en) 2007-03-06 2008-03-05 Laundry treating apparatus
US13/788,333 Active US8690268B2 (en) 2007-03-06 2013-03-07 Laundry treating apparatus

Country Status (9)

Country Link
US (4) US20080245114A1 (pt)
EP (3) EP2137348A4 (pt)
CN (3) CN101688347B (pt)
AU (3) AU2008221775B2 (pt)
BR (3) BRPI0808700A2 (pt)
CA (3) CA2676598A1 (pt)
ES (1) ES2406075T3 (pt)
PL (1) PL2140058T3 (pt)
WO (3) WO2008108589A2 (pt)

Cited By (3)

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US20080235935A1 (en) * 2007-03-06 2008-10-02 Dong Woo Kang Laundry treating apparatus
US20120139286A1 (en) * 2010-12-03 2012-06-07 Liuzhou Wuling Motors Co., Ltd. Vehicle door with an irregular-circular frame for a recreational vehicle
US20160186369A1 (en) * 2013-08-13 2016-06-30 Electrolux Appliances Aktiebolag A Laundry Treatment Device Having a Control Panel Assembly

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KR101754706B1 (ko) * 2010-04-21 2017-07-06 엘지전자 주식회사 금속제 컨트롤 패널을 갖는 의류처리장치
JP5609503B2 (ja) * 2010-10-01 2014-10-22 パナソニック株式会社 ドラム式洗濯機
PL2837727T3 (pl) 2013-08-13 2017-06-30 Electrolux Appliances Aktiebolag Urządzenie pralnicze z zestawem panelu sterowania
EP2837726B1 (en) * 2013-08-13 2016-10-12 Electrolux Appliances Aktiebolag A laundry treatment device having a control panel assembly
EP2837728A1 (en) 2013-08-13 2015-02-18 Electrolux Appliances Aktiebolag A laundry treatment device having a control panel assembly
KR102318188B1 (ko) * 2014-02-11 2021-10-28 삼성전자주식회사 세탁기
WO2015122693A1 (ko) * 2014-02-11 2015-08-20 삼성전자주식회사 세탁기
US20160083891A1 (en) * 2014-09-23 2016-03-24 General Electric Company Washing machine appliances and methods for assembling cabinets of washing machine appliances
EP3064633A1 (en) * 2015-03-02 2016-09-07 Electrolux Appliances Aktiebolag Laundry treatment appliance with user interface
US10060066B2 (en) 2016-06-30 2018-08-28 Whirlpool Corporation Laundry appliance door assembly
US20180002854A1 (en) 2016-06-30 2018-01-04 Whirlpool Corporation Method and apparatus for applying a touch film to a compound curved surface
CN108221296B (zh) * 2017-12-30 2024-01-19 Tcl家用电器（合肥）有限公司 前面板组件及其制备方法
CN108049124B (zh) * 2018-01-10 2021-08-03 青岛胶州海尔洗涤电器有限公司 一种洗衣机箱体及洗衣机
CN110761044A (zh) * 2019-09-20 2020-02-07 滁州市友邦涂装有限公司 一种洗衣机前面板及其喷涂工艺

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WO2008108587A3 (en) 2009-09-11
ES2406075T3 (es) 2013-06-05
CN101688347A (zh) 2010-03-31
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CN101688348A (zh) 2010-03-31
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CN101688352B (zh) 2011-09-07
BRPI0808701A2 (pt) 2014-09-02
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CA2676599A1 (en) 2008-09-12
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WO2008108587A2 (en) 2008-09-12
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EP2140058A4 (en) 2011-06-01
WO2008108589A3 (en) 2009-09-11
CN101688352A (zh) 2010-03-31
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US20080265721A1 (en) 2008-10-30
US20080235935A1 (en) 2008-10-02

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