EP0358906A2 - Semelle pour fer à repasser - Google Patents

Semelle pour fer à repasser Download PDF

Info

Publication number
EP0358906A2
EP0358906A2 EP89113823A EP89113823A EP0358906A2 EP 0358906 A2 EP0358906 A2 EP 0358906A2 EP 89113823 A EP89113823 A EP 89113823A EP 89113823 A EP89113823 A EP 89113823A EP 0358906 A2 EP0358906 A2 EP 0358906A2
Authority
EP
European Patent Office
Prior art keywords
coating
iron
sole body
sole
iron soleplate
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.)
Granted
Application number
EP89113823A
Other languages
German (de)
English (en)
Other versions
EP0358906A3 (en
EP0358906B1 (fr
Inventor
Ahmet Dr. Firatli
Diethard Burger
Klaus Amsel
Bernd Lindstaedt
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.)
Braun GmbH
Original Assignee
Braun GmbH
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 Braun GmbH filed Critical Braun GmbH
Priority to AT89113823T priority Critical patent/ATE80423T1/de
Publication of EP0358906A2 publication Critical patent/EP0358906A2/fr
Publication of EP0358906A3 publication Critical patent/EP0358906A3/de
Application granted granted Critical
Publication of EP0358906B1 publication Critical patent/EP0358906B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • 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
    • D06F75/00—Hand irons
    • D06F75/38—Sole plates

Definitions

  • the invention relates to an iron soleplate according to the preamble of patent claim 1.
  • EP-A3 0 217 014 describes an iron soleplate in which the sole body is made of aluminum in order to achieve good thermal conductivity and to reduce weight and thus to make the entire iron easier to handle.
  • the soleplate of the iron described in EP-A3 0 217 014 was provided with a ceramic hard material layer on its temple side, which was applied using a thermal spraying process, for example a flame or plasma spraying process.
  • the hard material layer produced in this way has the disadvantage that it is porous and that especially on steam irons, it absorbs moisture, air and also impurities that can penetrate to the sole body. As a result, corrosion occurs on the aluminum surface on the temple side of the sole body, which can lead to throwing up or blistering and finally even to detachment of the hard material layer. The consequence of this is damage to the ironing side of the sole body, which can lead to damage to the material to be ironed during ironing and causes increased frictional forces when the iron is moving.
  • the iron soleplate known from EP-A3 0 217 014 is also heavily soiled in the course of time by finishing agents and starch which adhere and burn onto the hard material layer and, if the textiles in question are ironed too hot, also by material residues. The consequence of this is a dull sole surface which hinders sliding over the material to be ironed. It is almost impossible to remove burnt-on finishing agents with cleaning agents. The only way to make the soleplate glide again is to sand it down and coat it again.
  • the sole body of the iron sole known from DE-AS 19 52 846 consists of a steel sheet, first with a corrosion-preventing copper layer, then with an overlying nickel-chrome layer and finally with a third overlying the nickel-chrome layer, made of temperature-resistant plastic existing layer is coated.
  • the surface of the nickel-chromium layer is sandblasted to such an extent that it is hammered over the entire surface into the copper corrosion protection layer underneath.
  • four process steps are already necessary, without including a surface treatment of the steel sheet before the copper layer is applied. The entire process for producing the coating is therefore relatively complex and too expensive for mass production of iron soles.
  • the soleplate of the iron is only scratch-resistant to a limited extent due to the insufficient hardness of the plastic layer, and after appropriate abrasion of the plastic layer due to the previous roughening of the nickel-chromium layer by sandblasting, it is also only slidable to a limited extent.
  • this iron soleplate also has the disadvantage that a large number of process steps are necessary for its manufacture and that even after prolonged use the ceramic layer on the ironing side of the aluminum sole can only be reliably secured by attaching a metallic adhesive layer between these two materials. Otherwise, the significantly different thermal expansion coefficients of aluminum and most ceramics mean that the adhesion between the sole body and the hard material layer is broken at least in part after a long period of time, which in particular with steam irons leads to the penetration of moisture and thus in turn to corrosion and the associated, already described can lead to negative effects on the side of the soleplate.
  • the soleplate according to the invention has the advantage that it can be produced by only two process steps, namely a thermal spraying process and a grinding process, in spite of its excellent properties mentioned in the task.
  • the coating exhibits excellent adhesion to the sole body even with frequent heating and subsequent cooling of the sole body, since the coefficients of thermal expansion of two metallic bodies generally differ less than those between a metal on the one hand and a ceramic material on the other.
  • the thermal spraying process also ensures that the density of the coating is very high and the porosity is approximately 2% by volume. Furthermore, the thermal conductivity of a metal is fundamentally higher than the thermal conductivity of a ceramic material or a PTFE layer. Therefore, an iron with the soleplate according to the invention on its ironing side is heated up much more quickly after being switched on and can therefore be used more quickly than the known irons. Likewise, the good heat conductivity of the coating ensures that the heat is transported from the sole body to the material to be ironed, which is necessary during the ironing, even when the material to be ironed absorbs larger amounts of heat.
  • the coating of the soleplate according to the invention forms a glossy, easy-to-clean surface over the entire period of use.
  • the grinding method according to the invention has the advantage that the sole body on its temple side does not necessarily have to be planar within narrow limits, i.e. the sole can be concave, convex or wavy, and secondly the advantage that the volume of material removed is relatively small.
  • the sole body is ground not only on its side of the temple but also on the side edges thereof in one operation, so that the second operation required in conventional grinding processes can be omitted.
  • a hard alloy according to claim 5 is selected for the material of the coating, and advantageously an alloy according to claim 6, a surface with an average roughness R a of only about 3 to at most 5 ⁇ m can be achieved on the side of the bracket when using a hypersonic flame spraying process. while the average roughness value is significantly above 5 ⁇ m when using other alloys.
  • a nickel alloy and a grain size of 20-60 ⁇ m (claim 8) on the one hand result in particularly good adhesion and on the other hand low surface roughness of the applied Be layering.
  • the last-mentioned advantage means that the effort for the second process step, namely the grinding process, is relatively low.
  • the thickness of the coating has become the optimal compromise between the advantages of a coating with a large thickness (very long service life and the greatest possible corrosion prevention) and the advantages of a coating that is as thin as possible (saving material and energy during the thermal spraying process and the shortest possible cycle times in series production) result between 5 ⁇ m and 200 ⁇ m (claim 10).
  • Fig. 1 shows a steam iron 1
  • the housing 2 has an iron soleplate 3 and a handle 4.
  • a water container is formed in the housing 2 and can be filled and emptied via an opening 7.
  • a heating element 19 (FIG. 3) present in the housing 2 is in close thermal contact with the soleplate 3 and can be connected to the voltage source via a power supply cable 5.
  • the temperature of the soleplate 3 can be adjusted via a first rotary knob 6 connected to a temperature controller.
  • Steam outlet openings 12 of different sizes are provided on the ironing side of the iron soleplate 3 (cf. FIG. 2).
  • the iron also has a second rotary knob 8 with which the amount of water entering the evaporation chamber 15 per unit of time and thus the amount of water convertible to steam can be adjusted.
  • the steam iron On the top of the handle 4, the steam iron has a first actuation button 9 and a second actuation button 11.
  • the soleplate 3 on its ironing side essentially consists of a sole body 13, a coating 14 and the openings 12.
  • the soleplate 3 On the side of the iron soleplate 3 facing away from the side of the iron, the soleplate 3 has one Evaporation chamber 15, which can be closed at the top by a cover, not shown, and a steam distribution chamber 16, which in turn is connected to the openings 12.
  • the steam distribution chamber 16 is essentially formed by a channel running on the edge of the sole body 13, which is delimited in the horizontal direction by dividing walls 17 and 18, downwards by the sole body 13 itself and upwards - just like the evaporation chamber 15 - by the cover, not shown becomes.
  • a heating element 19 cast in the sole body 13 runs parallel to the steam distribution chamber 16 and also partially projects into the evaporation chamber 15.
  • the heating element 19 has at the rear end of the sole body 13 contact tabs 20 and 21 which are connected to the voltage supply via the temperature controller (not shown in the drawing).
  • the partition wall 18 In the rear area of the evaporation chamber 15, the partition wall 18 has two opposing passages 22 and 23 which connect the evaporation chamber to the steam distribution chamber 16 on both sides when the cover is in place.
  • the sole body 13 is produced by the die casting process and consists of an aluminum alloy, for example one of the alloys GD-Al Si 10 Mg, GD-Al Mg 9, GD-Al Si mentioned in the German Industry Standard (DIN) 1725, Part 2 12 or GD-Al Si 12 (Cu). After the casting process, it is cleaned overall and roughened on its side by blasting with granular material. The graininess of the material is selected so that a surface having a mean roughness value R a according to DIN 4768 is formed on the ironing side of the soleplate body portion 13 in the range of about 2 to 10 microns.
  • the temple side of the sole body 13 is then covered with a hard nickel alloy with a melting point of approximately 1050 ° C. and a Rockwell hardness up to a value of about HRG 64.
  • the coating 14 is applied by means of a thermal spraying process, such as, for example, flame, plasma or arc spraying.
  • a hypersonic flame spraying method is preferably used, ie the individual particles of the hard nickel alloy are thrown onto the temple side of the sole body 13 at supersonic speed.
  • the flame temperature for liquefying the nickel hard alloy particles, whose grain size is in the range of 20-60 ⁇ m, is approximately 2500 ° C.
  • hypersonic flame spraying method known per se has the following essential features and parameters:
  • propane gas and, on the other hand, oxygen are supplied to the premixing chamber of a water-cooled high-speed burner.
  • This mixture is ignited and fed to a combustion chamber.
  • the combustion chamber is also fed, together with a carrier gas consisting of nitrogen or air, a hard nickel alloy with a melting point of approximately 1050 ° C., a grain size of 20 to 60 ⁇ m and a Rockwell hardness up to a value of approximately HRC 64 .
  • the individual particles of the powdery hard nickel alloy are liquefied or made into dough and due to the expansion of the burning propane-oxygen mixture at high speed from a burner nozzle against the side of the bracket Sole body accelerated. This makes it with the nickel hard alloy coated.
  • the exit velocity of the burned gas including the nickel particles contained in it is between 400 and 700 m / sec.
  • the soleplate 3 provided with the coating 14 on the side of the temple in this way is then ground.
  • a drag grinding method is preferably used, in which the soleplate 3 is moved back and forth by periodically repeating movement sequences within a container which contains an abrasive consisting of many individual abrasive bodies.
  • the coating 14 is ground down to a roughness with a mean roughness value R a according to DIN 4768 of between 0.05 and 2.0 ⁇ m, the grinding process taking longer, the lower the desired roughness is set.
  • the grinding process is first started in a first container with grinding bodies which coat the coating 14 up to a roughness with a mean roughness value R a according to DIN 4768 0.3 microns can abrade to 0.7, and continued thereafter for the purpose of polishing in a second container contained in the finer abrasive, which can abrade the coating 14 microns up to a residual roughness with a mean roughness value R a of 0.05 .
  • the known grinding method used for the soleplate according to the invention has the following essential features and parameters:
  • a ring-shaped, rubberized steel container is filled to about 80% with grinding wheels.
  • the iron soles to be machined are attached to a rotating ring arranged above.
  • the slewing ring is set in rotation and the iron soles attached to clamping devices, which at the same time still rotate on their own axis, are pulled through the grinding stone bed.
  • the speed of rotation of the slewing ring is in the range of 7 to 30 revolutions per minute with a grinding wheel diameter of approximately 1.5 m.
  • the abrasive bodies themselves consist of an aluminum oxide abrasive grain arranged in a plastic matrix with an average grain size of approximately 50 to 70 ⁇ m and have approximately the shape of a tetrahedron, the edge length of which is approximately 10 to 20 mm at the start of the grinding process.
  • the grinding wheels used for the polishing process likewise consist of an aluminum oxide grinding grain arranged in a plastic matrix and likewise have a tetrahedral shape.
  • the average grain size of the abrasive grain here is approximately 20 to 40 ⁇ m, while the edge length of the abrasive bodies at the start of the polishing process is in the range of approximately 10 mm.
  • Both grinding and polishing are preferably carried out in the presence of water to which additives can be added. These consist of water-soluble substances that are available in solid, powdered or liquid form. Your job is to create a clean surface on the coating that is free of all contaminants. Due to the thorough cleaning and wetting by the additives, the abrasion of abrasive bodies and coating is constantly removed from the surface to be machined, so that the maximum abrasive effect of the abrasive bodies is retained. The iron soles, the grinding wheels and the machines used for the grinding and polishing process are thus kept clean, bright and flawless surfaces and a maximum grinding effect is guaranteed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Irons (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP89113823A 1988-08-25 1989-07-27 Semelle pour fer à repasser Expired - Lifetime EP0358906B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89113823T ATE80423T1 (de) 1988-08-25 1989-07-27 Buegeleisensohle.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3828818 1988-08-25
DE3828818 1988-08-25
DE3918824A DE3918824A1 (de) 1988-08-25 1989-06-09 Buegeleisensohle
DE3918824 1989-06-09

Publications (3)

Publication Number Publication Date
EP0358906A2 true EP0358906A2 (fr) 1990-03-21
EP0358906A3 EP0358906A3 (en) 1990-03-28
EP0358906B1 EP0358906B1 (fr) 1992-09-09

Family

ID=25871463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113823A Expired - Lifetime EP0358906B1 (fr) 1988-08-25 1989-07-27 Semelle pour fer à repasser

Country Status (5)

Country Link
US (1) US5025578A (fr)
EP (1) EP0358906B1 (fr)
CA (1) CA1333976C (fr)
DE (2) DE3918824A1 (fr)
ES (1) ES2034530T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240552A (en) * 1990-01-05 1991-08-07 David Donald Kiilunen Applying metal to metal with imperfections and subsequently grinding.
EP0549333A1 (fr) * 1991-12-24 1993-06-30 Sunbeam Corporation Limited Fer à repasser à vapeur
GB2268432A (en) * 1990-01-05 1994-01-12 David Donald Kiilunen Flux cored wire
WO1999051792A1 (fr) * 1998-04-03 1999-10-14 Wella Aktiengesellschaft Procede pour produire des surfaces de glissement et/ou des aretes de cisaillement en materiau dur sur un materiau de base, et surface de glissement et/ou arete de cisaillement produites a l'aide dudit procede

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2662189A1 (fr) * 1990-05-18 1991-11-22 Seb Sa Fer a repasser a semelle recouverte par un revetement anti-adhesif.
BE1008961A3 (nl) * 1994-11-14 1996-10-01 Philips Electronics Nv Strijkijzer met glijlaag.
DE19503883A1 (de) * 1995-02-07 1996-08-08 Braun Ag Verfahren zum Bearbeiten der Bügelfläche einer Bügeleisensohle
ES2198573T5 (es) * 1996-09-24 2008-05-16 Koninklijke Philips Electronics N.V. Plancha y base inferior para una plancha.
DE19745863C2 (de) * 1997-10-16 2001-02-22 Bsh Bosch Siemens Hausgeraete Bügeleisen mit Bügeleisensohle
FR2776681B1 (fr) * 1998-03-27 2000-11-24 Moulinex Sa Semelle de fer a repasser electrique
KR100494256B1 (ko) * 1998-04-28 2005-06-13 마츠시타 덴끼 산교 가부시키가이샤 다리미
FR2784280B1 (fr) * 1998-10-08 2000-12-22 Daniel Bernard Composites ceramique metal obtenus par projection thermique pour articles de chauffe
DE59900161D1 (de) * 1999-01-22 2001-08-23 Braun Gmbh Elektrisches Bügeleisen und Verfahren zur Herstellung eines elektrischen Bügeleisens
US6540168B1 (en) * 1999-09-01 2003-04-01 Dorian O. Archer Retractable cord assembly
US7144302B2 (en) 2000-12-27 2006-12-05 Siemens Aktiengesellschaft Method for smoothing the surface of a gas turbine blade
EP1219389A1 (fr) 2000-12-27 2002-07-03 Siemens Aktiengesellschaft Procédé pour le lissage de la surface extérieure d'une aube d'une turbine à gaz
AU2003213385A1 (en) * 2002-03-15 2003-09-29 Kabushiki Kaisha Riken Cell unit of solid polymeric electrolyte type fuel cell
CN112030093A (zh) * 2020-07-15 2020-12-04 成都飞机工业（集团）有限责任公司 一种机器人火焰喷铝最佳路径间距的获取方法

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DE949727C (de) * 1952-12-30 1956-09-27 Willi Lueckel Tubenverschluss aus thermoplastischem Kunststoff, ausgebildet als Sprungdeckelverschluss
US2846793A (en) * 1955-04-21 1958-08-12 Hoover Co Smoothing iron soleplate
US3104482A (en) * 1960-05-02 1963-09-24 Sunbeam Corp Pressing iron
BE621641A (fr) * 1961-08-22
US3333955A (en) * 1964-09-30 1967-08-01 Int Nickel Co Aluminum alloy and sole plate for electric iron and the like made therefrom
US3480461A (en) * 1966-11-14 1969-11-25 Hamlin Stevens Inc Metal articles having polytetrafluoroethylene-coated pressing surfaces and methods of their manufacture
US3412492A (en) * 1967-08-10 1968-11-26 Reimers Electra Steam Inc Steam iron
DE2151858A1 (de) * 1970-11-04 1972-05-10 Soernewitz Elektrowaerme Veb Elektrisch beheiztes Buegeleiscn
LU65309A1 (fr) * 1972-05-08 1973-11-23
US3890069A (en) * 1973-07-05 1975-06-17 Ford Motor Co Coating for rotary engine rotor housings and method of making
DE2616286A1 (de) * 1976-04-13 1977-10-27 Baumgartner Buegeleisensohle
US4206340A (en) * 1976-04-14 1980-06-03 Osrow Products Co., Inc. Electrolytically heated fabric steaming device having selectively variable steam generation and distribution
US4196340A (en) * 1978-03-09 1980-04-01 General Electric Company Electrolytic steam iron having means to minimize moisture condensation on the soleplate
US4240229A (en) * 1978-11-30 1980-12-23 Ietatsu Ohno Immersion type grinding apparatus
EP0163598B1 (fr) * 1984-04-27 1989-10-04 Ciba-Geigy Ag Compositions herbicides
FR2581402B1 (fr) * 1985-05-02 1988-03-25 Seb Sa Semelle de fer a repasser recouverte par un revetement d'email
US4665637A (en) * 1985-07-26 1987-05-19 Braun Aktiengesellschaft Sole plate coating for a fabric pressing device
ES2023113B3 (es) * 1985-12-24 1992-01-01 Braun Ag Base de plancha.
DE3644211A1 (de) * 1985-12-24 1987-08-27 Braun Ag Buegeleisensohle
US4800661A (en) * 1986-05-20 1989-01-31 Toshiba Heating Appliances Co., Ltd. Electric iron

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2240552A (en) * 1990-01-05 1991-08-07 David Donald Kiilunen Applying metal to metal with imperfections and subsequently grinding.
GB2268432A (en) * 1990-01-05 1994-01-12 David Donald Kiilunen Flux cored wire
GB2268432B (en) * 1990-01-05 1994-08-31 David Donald Kiilunen Flux cored wire
GB2240552B (en) * 1990-01-05 1994-08-31 David Donald Kiilunen Metal filler composition and method of employing same
EP0549333A1 (fr) * 1991-12-24 1993-06-30 Sunbeam Corporation Limited Fer à repasser à vapeur
US5367799A (en) * 1991-12-24 1994-11-29 Sunbeam Corporation Limited Iron with fluid distributing fins and thermostat arrangement
WO1999051792A1 (fr) * 1998-04-03 1999-10-14 Wella Aktiengesellschaft Procede pour produire des surfaces de glissement et/ou des aretes de cisaillement en materiau dur sur un materiau de base, et surface de glissement et/ou arete de cisaillement produites a l'aide dudit procede

Also Published As

Publication number Publication date
EP0358906A3 (en) 1990-03-28
DE3918824A1 (de) 1990-03-08
US5025578A (en) 1991-06-25
DE3918824C2 (fr) 1990-10-04
DE58902248D1 (en) 1992-10-15
ES2034530T3 (es) 1993-04-01
CA1333976C (fr) 1995-01-17
EP0358906B1 (fr) 1992-09-09

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