EP0358906B1 - Bügeleisensohle - Google Patents

Bügeleisensohle Download PDF

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Publication number
EP0358906B1
EP0358906B1 EP89113823A EP89113823A EP0358906B1 EP 0358906 B1 EP0358906 B1 EP 0358906B1 EP 89113823 A EP89113823 A EP 89113823A EP 89113823 A EP89113823 A EP 89113823A EP 0358906 B1 EP0358906 B1 EP 0358906B1
Authority
EP
European Patent Office
Prior art keywords
soleplate
coating
iron
smoothing iron
body portion
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.)
Expired - Lifetime
Application number
EP89113823A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0358906A2 (de
EP0358906A3 (en
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/de
Publication of EP0358906A3 publication Critical patent/EP0358906A3/de
Application granted granted Critical
Publication of EP0358906B1 publication Critical patent/EP0358906B1/de
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 claim 1 and a method for producing iron soles according to the invention.
  • EP-A2 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-A2 0 217 014 was provided on its side with a ceramic hard material layer 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 it absorbs moisture, air and also impurities which can penetrate as far as the sole body, particularly in the case of steam irons.
  • 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-A2 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 also has only limited slidability.
  • 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 when it is often heated and subsequently cooled, since the thermal Expansion coefficients of two metallic bodies generally differ less than those between a metal on the one hand and a ceramic material on the other.
  • the alloy according to the invention in conjunction with a thermal spraying process, ensures that the density of the coating is quite high, and thus the porosity is very low at about 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 is thus usable more quickly than the known irons. Likewise, the good thermal conductivity of the coating ensures that the heat is transported from the sole body to the material to be ironed during 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.
  • a hard alloy is selected for the material of the coating according to claim 4, then when using a hypersonic flame spraying process, a surface with a mean roughness value R a of only about 3 to at most 5 ⁇ m can be used on the side of the bracket reach, while the average roughness value is well above 5 ⁇ m when using other alloys.
  • the coating has a thickness between 50 ⁇ m and 200 ⁇ m (claim 5).
  • 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, that is to say the sole can be concave, convex or even wavy, and on the other hand the advantage that the removal volume is relative is 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.
  • the drag-grinding method used is particularly advantageous because the otherwise sharp edges that usually occur on the steam outlet holes are eliminated since due to their small dimensions, the grinding tools can also remove material in this area.
  • a nickel alloy according to claim 4 and a grain size of 20-60 ⁇ m result in a particularly good adhesion and on the other hand, a low surface roughness of the applied coating.
  • the last-mentioned advantage means that the effort for the second process step, namely the grinding process, is relatively low.
  • 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 present in the housing 2 (FIG. 3) is in close thermal contact with the iron 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 1 On the top of the handle 4, the steam iron 1 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 HRC 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 processed 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 track 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 grinding wheels and coating is constantly removed from the surface to be processed, so that the maximum grinding effect of the grinding wheels is maintained. 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 Bügeleisensohle Expired - Lifetime EP0358906B1 (de)

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
DE3918824 1989-06-09
DE3918824A DE3918824A1 (de) 1988-08-25 1989-06-09 Buegeleisensohle

Publications (3)

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

Family

ID=25871463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113823A Expired - Lifetime EP0358906B1 (de) 1988-08-25 1989-07-27 Bügeleisensohle

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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GB2268432B (en) * 1990-01-05 1994-08-31 David Donald Kiilunen Flux cored wire
US5013587A (en) * 1990-01-05 1991-05-07 Midwest Thermal Spray, Inc. Metal filler composition and method of employing same
FR2662189A1 (fr) * 1990-05-18 1991-11-22 Seb Sa Fer a repasser a semelle recouverte par un revetement anti-adhesif.
ES2114921T3 (es) * 1991-12-24 1998-06-16 Sunbeam Corp Plancha.
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
DE69721836T3 (de) * 1996-09-24 2008-07-17 Koninklijke Philips Electronics N.V. Bügeleisen und bügeleisensohle
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
DE19909887A1 (de) * 1998-04-03 1999-10-07 Wella Ag Verfahren zum Herstellen von Gleitflächen und/oder Scherkanten aus Hartwerkstoff auf einem Grundwerkstoff sowie eine nach diesem Verfahren hergestellte Gleitfläche und/oder Scherkante
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
ES2161559T3 (es) * 1999-01-22 2001-12-01 Braun Gmbh Plancha electrica y metodo para la fabricacion de una plancha electrica.
US6540168B1 (en) * 1999-09-01 2003-04-01 Dorian O. Archer Retractable cord assembly
EP1219389A1 (de) 2000-12-27 2002-07-03 Siemens Aktiengesellschaft Verfahren zur Glättung der Oberfläche einer Gasturbinenschaufel
US7144302B2 (en) 2000-12-27 2006-12-05 Siemens Aktiengesellschaft Method for smoothing the surface of a gas turbine blade
CN1314153C (zh) * 2002-03-15 2007-05-02 株式会社理研 固体高分子电解质型燃料电池的电池组件

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Also Published As

Publication number Publication date
CA1333976C (en) 1995-01-17
EP0358906A2 (de) 1990-03-21
DE3918824C2 (cs) 1990-10-04
DE3918824A1 (de) 1990-03-08
DE58902248D1 (en) 1992-10-15
EP0358906A3 (en) 1990-03-28
US5025578A (en) 1991-06-25
ES2034530T3 (es) 1993-04-01

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