SI9110062A

SI9110062A - Process for closing the evaporation chamber of an electrically heated steam iron

Info

Publication number: SI9110062A
Application number: SI9110062A
Authority: SI
Inventors: Robert Walter; Steinebrunner
Original assignee: Rowenta Werke Gmbh
Priority date: 1990-02-26
Filing date: 1991-01-16
Publication date: 1997-04-30

Abstract

V izumu je opisan postopek za zapiranje komore za izparevanje električno gretega parnega likalnika s pokrovom z zakovičenjem.The invention describes a closure process evaporation chambers for electrically heated steam riveted iron with lid.

Description

POSTOPEK ZA ZAPIRANJE KOMORE ZA IZPAREVANJE ELEKTRIČNEGA PARNEGA LIKALNIKAPROCEDURE FOR CLOSING THE CHAMBER FOR EVAPORATION OF THE ELECTRIC STEAM IRON

TEHNIČNA RAZVRSTITEV IZUMATECHNICAL CLASSIFICATION OF THE INVENTION

V predloženem izumu je opisan postopek za zapiranje komore za izparevanje pri električnih parenih likalnikih, s tem, da je po mednarodni razvrstitvi izuma le-ta razvrščen in označen s klasifikacijskimi simboli F 16 B 5/04 in F 16 B 4/00.The present invention describes a method for closing an evaporation chamber in electric steam irons, according to which, according to the international classification of the invention, it is classified and marked with the classification symbols F 16 B 5/04 and F 16 B 4/00.

TEHNIČNI PROBLEM IZUMATECHNICAL PROBLEM OF THE INVENTION

Tehnični problem, ki ga rešujemo v izumu je sledeč; kako izvesti postopek, s pomočjo katerega bo pokrov komore za izparevanje parnega likalnika hermetično in trajno povezan s podnožno ploščo, brez da bi prišlo do znanih pomankljivosti.The technical problem to be solved in the invention is as follows; how to perform a procedure by which the lid of the steam iron evaporator chamber will be hermetically and permanently connected to the baseplate without any known deficiencies.

OPIS IZUMADESCRIPTION OF THE INVENTION

Pri električnih parnih likalnikih, ki delujejo na principu kapanja se komora za izparevanje, v kateri se tekočina spreminja v paro, enako kot pripadajoči parni kanali, nahajajo v električno greti podnožni plošči. Voda kaplja iz rezervoarja za vodo v komoro za izparevanje. Tukaj nastajajoča nasičena para se v parnih kanalih pregreva in izhaja na likalni površini podnožne plošče. Podnožna plošča je izdelana iz tlačno litega aluminija. V podložni plošči postavljena komora za izparevanje in parni kanali so zaprti s pokrovom. Zaradi izparevanja vode in s tem povezanimi fizikalnimi procesi, v komori za izparevanje nastaja tlak, ki deluje na vse stene komore. Najšibkejša točka komore za izparevanje je povezava med pokrovom komore za paro in podnožno ploščo, ki se pri dosedaj poznanih parnih likalnikih izdela s kovičenjem. Poleg tega so na gornji površini vertikalnega rebra komore za paro, vlite kovice s približno konusno obliko podnožja kovice. Po namestitvi pokrova na gornjo površino rebra komore za paro, se z zakovanjem kovice pokrov trdno poveže s podnožno ploščo.For drip-operated electric steam irons, the evaporation chamber, in which the liquid changes to steam, in the same way as the associated steam channels, is located in an electrically heated base plate. Water drips from the water tank to the evaporation chamber. The saturated vapor generated here is superheated in the steam channels and emitted on the iron surface of the base plate. The base plate is made of die-cast aluminum. The evaporator chamber and the steam ducts are sealed with a lid in the baseplate. Due to the evaporation of water and the associated physical processes, a pressure is created in the evaporation chamber that acts on all the walls of the chamber. The weakest point of the evaporation chamber is the connection between the lid of the steam chamber and the base plate, which is made by riveting in the hitherto known steam irons. In addition, there are cast rivets on the upper surface of the vertical rib of the steam chamber, with an approximately conical shape of the base of the rivet. After installing the lid on the upper surface of the rib of the steam chamber, the rivet is firmly connected to the base plate by riveting the rivet.

Pomankljivost dosedaj poznanega postopka je, da se pokrov lahko poveže s podnožno ploščo samo s pomočjo oblikovanih glav. Ker so kovice nalite na rebro komore za paro je iz livarskega vidika neizbežno, da ima vsako podnožje kovice obliko zarobljene čaše. Poleg tega mora, zaradi hermetične zveze med pokrovom in komoro za izparevanje, pred kovičenjem pokrova in komore za izparevanje, pokrov ležati ravno na zgornji površini rebra komore za paro. Zato je nujno, da je prečni prerez odprtine, ki pripada vsaki kovici, enak ali večji od maksimalnega prečenega prereza kovice. Podnožje kovice, ki ima obliko zarobljene čaša, po končanem kovičenju prostornine odprtine za kovico ne zapolni popolnoma z zakovano kovico, saj je prečni presek glave kovice nekoliko večji od prečnega preseka odprtine za kovice. Kovica ne izvaja bočnega pritiska na odprtino pokrova. Zaradi pritiska iz komore za izparevanje na pokrov, zaradi pomankanja bočnega pritiska, vsaka posamezna kovica ne bo izpostavljena raztezanju. Pritisk komore deluje samo kot sila raztezanja na glavo kovice. Pokrov bo zaradi sile pritiska komore privzdignjen, glave kovic so zaradi sile raztezanja napete. Zaradi praznega prostora med pokrovom in rebrom komore prehaja para in s tem tudi vlaga v notranjost likalnika. Pri poznanih parnih likalnikih obstaja zelo velika nevarnost, da zaradi vrtinčastih tokov pride do kratkega stika ali uporabnik pride v stik z napetostjo na napravi, kar povzroči telesne poškodbe.A disadvantage of the process known so far is that the cover can only be connected to the baseplate by means of molded heads. Since the rivets are poured on the rib of the steam chamber, it is inevitable from the foundry's perspective that each base of the rivet has the shape of a trapped beaker. In addition, due to the tight connection between the lid and the evaporation chamber, before the riveting of the lid and the evaporation chamber, the lid must lie flat on the upper surface of the rib of the steam chamber. It is therefore essential that the cross-section of the opening belonging to each rivet is equal to or greater than the maximum cross-section of the rivet. After the riveting is completed, the base of the rivet shaped cup is not completely filled with riveted rivets, since the cross section of the rivet head is slightly larger than the cross section of the rivet opening. The rivet does not exert lateral pressure on the lid opening. Due to the pressure from the evaporation chamber on the lid, due to the lack of lateral pressure, each individual rivet will not be exposed to stretching. The pressure of the chamber acts only as a stretching force on the rivet head. The lid will be raised due to the pressure of the chamber, the rivet heads are tense due to the stretching force. Due to the empty space between the lid and the rib of the chamber, steam passes and thus invests inside the iron. Known steam irons have a very high risk of short circuiting due to swirling currents or the user coming into contact with the voltage on the device causing personal injury.

OPIS REŠITVE TEHNIČNEGA PROBLEMADESCRIPTION OF THE TECHNICAL PROBLEM SOLUTION

Rešitev zgoraj navedenega problema bo predmet patentnega zahtevka.A solution to the above problem will be the subject of a claim.

S postopkom, ki je predmet predloženega izuma, dosežemo da se z velikim pritiskom obročastega pritiskača preseže meja raztezanja materiala pokrova tako, da se material pokrova v robnem področju odprtine zakovice raztegne do vsake kovice. Vsaka kovica bo v področju stene odprtine za kovico obkrožena z materialom pokrova. Morebiten prazen prostor med kovico in pokrovom bo zapolnjen z raztegnjenim materialom pokrova. Po kovičenju stebla in oblikovanju glave kovice bo robno področje vsake odprtine kovice v pokrovu v veliki površini pokrito. Po končanem postopku kovičenja vsako steblo z velikim bočnim pritiskom pritiska na pokrov. Med posamičnimi kovicami in pokrovom nastaja trdna vez tako, da glave kovic niso izpostavljene samo raztezanju. S strani komore za izparevanje in na rebro komore ter pokrov ustvarjeni pritisk ne more razdvojiti zakovičene vezi med pokrovom in rebrom komore za izparevanje, ker so kovice zaradi pritiska pretežno raztegnjene. Ker je premer glave kovic v večji od premera odprtine za kovice, se glave kovic ne morejo več stisniti, s tem pa dosežemo absolutno hermetično in neraztavljivo vez med pokrovom in rebrom komore za izparevanje.By the process of the present invention, it is achieved that by extending the annular presser with great pressure, the extending limit of the cover material is extended by extending the cover material in the edge region of the rivet opening to each rivet. Each rivet will be surrounded by a cover material in the wall area of the rivet opening. Any gap between the rivet and the cover will be filled with the cover material being stretched. After riveting the stem and forming the rivet head, the edge area of each rivet opening in the lid will be covered over a large area. After the riveting process, each stem presses the lid with great lateral pressure. A solid bond is formed between the individual rivets and the cover so that the rivet heads are not exposed to stretching only. The pressure exerted on the side of the evaporation chamber and on the rib of the chamber and the lid cannot create a riveted connection between the lid and the rib of the evaporation chamber, since the rivets are largely stretched due to pressure. Since the diameter of the rivet head is larger than the diameter of the rivet opening, the rivet heads can no longer be compressed, thereby achieving an absolutely hermetic and indivisible bond between the lid and the rib of the evaporation chamber.

Primer izvedbe izuma je prikazan na risbah in bo v nadaljevanju podrobneje opisan. Na risbah je prikazano:An example embodiment of the invention is shown in the drawings and will be described in further detail below. The drawings show:

- slika 1: del področja komore za izparevanje parnega likalnika in obročasti pritiskač v prerezu;- Figure 1: Part of the evaporation chamber area of the steam iron and an annular cross-section presser;

- slika 2: del področje komore za izparevanje parnega likalnika iz slike 1 po izvedbi postopka opisanega v izumu.- Figure 2: part of the evaporation chamber area of the steam iron of Figure 1 after performing the process described in the invention.

Na sliki 1 je prikazan del komore za izparevanje parnega likalnika pred zapiranjem komore za izparevanje s pokrovom (1). Na gornji površini rebra (3) komore za izparevanje so nalite kovice (4) z livarsko tehnično pogojenim podnožjem (6) kovice, ki ima obliko zarobljene čaše. Pokrov 1 leži na gornji površini vertikalnega rebra (3) komore za izparevanje. Vsaki kovici pripadajoča odprtina (5) za kovico ima prečni presek, ki je enak ali večji od prečnega preseka pripadajočega podnožja (6) kovice. Pri izvedeni izvedbi postopka opisanega v izumu, po postavljanju pokrova (1) na gornjo površino (2) rebra (3) komore za izparevanje, se spušča obročasti pritiskač, preko kovice (4) na pokrov (1), robno področje (8) pokrova (1) je izpostavljeno pritisku obročastega pritiskača (7) vse, dokler se ne prekorači meja raztezanja materiala pokrova. Material pokrova se razleze v smeri kovice (4) tako, da je steblo kovice iz vseh strani obdano z materialom pokrova. Po trajni deformaciji robnega področja (8) se kovica zakuje in prosti konec (9) kovice (49 se izoblikuje v glavo (10) kovice. Alternativna rešitev je zapiranje komore za izparevanje podnožja parenga likalnika (1) preko več obročastih pritiskačev (7), ki delujejo na robna področja (8) pokrova (1), pri čemer se v enem delovnem hodu po postopku, ki je predmet izuma, komora za izparevanje zapre. Slika 2 prikazuje delni pogled komore za izparevanje z učvrščenim pokrovom (1) po izvajanju postopka po izumu. Iz tega prikaza lahko zaključimo, da je kovica (4) trdno obdana z materialom pokrova in glava (10) kovice prekriva robno področje (8) pokrova (1) po veliki površini.Figure 1 shows a portion of the evaporation chamber of a steam iron before closing the evaporation chamber with the lid (1). On the upper surface of the rib (3) of the evaporation chamber are poured rivets (4) with a foundry technically conditioned base (6) of rivets shaped like a trapped beaker. Cover 1 lies on the upper surface of the vertical rib (3) of the evaporation chamber. Each rivet associated rivet opening (5) has a cross-section equal to or greater than the cross-section of the corresponding rivet base (6). In carrying out the process of the invention, after installing the lid (1) on the upper surface (2) of the rib (3) of the evaporation chamber, the annular presser is lowered through the rivet (4) to the lid (1), the edge region (8) of the lid (1) is subjected to the pressure of the annular press (7) until the limit of elongation of the cover material is exceeded. The cover material extends in the direction of the rivet (4) so that the rivet stem is surrounded on all sides by the cover material. After permanent deformation of the edge region (8), the rivet is riveted and the free end (9) of the rivet (49) is formed into the rivet head (10) .An alternative solution is to close the evaporator base of the steam iron (1) via several ring presses (7). acting on the edge regions (8) of the lid (1), the evaporation chamber being closed in one working stroke according to the method of the invention Figure 2 shows a partial view of the evaporation chamber with a fixed lid (1) after performing the process According to the invention, it can be concluded that the rivet (4) is firmly surrounded by the material of the lid and the rivet head (10) covers the edge area (8) of the lid (1) over a large surface.

Za:For:

Rowenta-Werke GmbH Offenbach (Main), NemčijaRowenta-Werke GmbH Offenbach (Main), Germany

Claims

PATENT APPLICATION

1. A method for closing the evaporation chamber of an electrically heated steam iron, with a die-cast aluminum plate with injection molding, with a evaporation chamber firmly connected to the base plate and closed with a lid having a vertical rib of the chamber on which the upper surface is poured rivets with approximately tapered rivet base shape, each rivet opening having a counter rivet opening having a cross section of the rivet opening equal to or greater than the cross section of the rivet base, the rivet associated with the opening and, when the upper rib surface of the chamber is positioned, the cover will be associated with deformation of the rivet with a base plate, characterized in that the edge area (8) of each rivet opening (5) is exposed to the pressure of the annular press (7), at which the pressure of the annular press (7) is increased to the extent that the material of the cover material is exceeded, which is less than the stretch limit of the base plate material, after permanent deformation of the edge region (8) the honor press (7) is extended, the rivet (4) is riveted and the free end (9) of each rivet (4) is formed.