CS197019B1

CS197019B1 - Method and device for desoxidation of the chromiumcobalt alloys in the alcalic melts in stomatology

Info

Publication number: CS197019B1
Application number: CS781859A
Authority: CS
Inventors: Tibor Gabor; Alojz Martisik
Original assignee: Tibor Gabor; Alojz Martisik
Priority date: 1978-03-23
Filing date: 1978-03-23
Publication date: 1980-04-30

Description

(54) Sposob a zariadenie na dezoxidáciu chrómkobaltových zliatin v alkalických taveninách v stomatologii(54) Means and apparatus for deoxidizing chromium-cobalt alloys in alkaline melts in dentistry

Vynález sa týká spčsobu a zariadenia na dezoxidáciu chrómkobaltových zliatin v alkalických taveninách v stomatologii.The invention relates to a method and apparatus for the deoxidation of chromium-cobalt alloys in alkaline melts in dentistry.

Rieši problematiku dezoxidácie - odmorovania - povrchu odLiatkov z chrómkobaltových zliatin v zubolekárskej praxi.It solves the problem of deoxidation - odorization - of the surface of castings from chromium-cobalt alloys in dental practice.

V dentálnej praxi sa používali najma zliatiny drahých kovov a chrómkobaItové zliatiny z ktorých odliatky sa doteraz odmorovali v kyselinových roztokoch. Nevýhodou použitia kyselin a moridiel z minerálnych kyselin je ich agresivita voči stomatologickým kovom, zdlhavosťsposobu morenia, pričom dochádza k bodovej a interkryštalickej korózii, škodlivost výparov kyselin a najma to, že odliatky z chrómkotaltových zliatin v týchto kyselinových roztokoch odmorovaťnemožno. okrem toho i samotné odliatky zo zliatin z drahých kovov sa v kyselinových roztokoch neodmorujú dokonale a třeba na ich dočistenie použiťmechanické prostriedky.In the dental practice, in particular, precious metal alloys and chromium-cobalt alloys were used, the castings of which have so far been stained in acid solutions. The disadvantages of using acids and mordants from mineral acids are their aggressiveness towards dental metals, the length of the pickling process, with point and intercrystalline corrosion, the harmfulness of acid vapors, and in particular, that castings from chromocotta alloys in these acid solutions cannot be resisted. moreover, the precious metal alloy casts themselves do not completely melt in acidic solutions and need to be mechanically cleaned for cleaning.

Uvedené nedostatky odstraňuje spósob a zariadenia na dezoxidáciu chrómkobaltových zliatin v alkalických taveninách v stomatologii podta vynálezu, ktorého podstata spočívá v tom, že chrómkobaItový odliatok sa po dobu 10 až 30 minut moři v alkalickej tavenine so zložením 60 až 65 Z hydroxidu sodného, 30 až 35 % dusičnanu sodného a 3 až 8 Zchloridu sodného pri teplote 400 až 500°C. po mořeni sa odliatok ostrieka vodou a potom sa domoruje V kyslom kúpii 10 až 15 percentného roztoku kyseliny sirovej s přísadou 2 až 2,5 % dusičnanu sodného pri teplote 20 až 60°C po dobu Z až 20 minut.The aforementioned drawbacks are eliminated by a method and apparatus for deoxidizing chromium-cobalt alloys in alkaline melt in dentistry according to the invention, which is characterized in that the chromium-cobalt casting is in an alkaline melt of 60 to 65% sodium hydroxide, 30 to 35% % sodium nitrate and 3-8 sodium chloride at 400-500 ° C. After pickling, the cast is sprayed with water and then acidified with a 10-15% sulfuric acid solution containing 2 to 2.5% sodium nitrate at 20 to 60 ° C for Z to 20 minutes.

197 019197 019

197 019 podstata zariadenia podlá vynálezu spočívá v tom, Se zariadenie pozostáva t dvoch morladch nádoblek uložených v tepelne Izolované) skrlnke a terno)zolačnou zrnitou hmotou a opatřenou termolzolačným azbestovým vekom. prvá nádobka pre rnorled alkalický kůpeťje opatřená výkrevným telesom s elektrickou výhřevnou Spirálou a je uložená v Samotovom púzdreDruhá nádobka pre domorovanie je opatřená druhým výhřevným teleeom e druhou elektrickou výhřevnou Spirálou a je uložená v druhom Samotovom púzdre· pokrok spósobu a zariadenia podlá vynálezu spočívá predovšetkým v tom, že mořením podlá vynálezu je vylůčená priame reakcia so stomatologickým kovom, nevyýija sa atomárny vodík ako v kyselinách a preto nemóže dójsťk naleptanlu odllatku, po dezoxidácll je čistota odUatku taká, aků má použitý kov na odllevanle. balej sa Setři čas laborante urýchlovanim dezoxldačného procesu, zabezpečuje éa hygienická nezávadnosti Odllatky aú biologicky hodnotnejšie, gracilnejSie a pre pacienta sa stávajú prijemnejS1e. pokrok sposobu a zariadenia spočívá clalej v tom, že se ním dodell úplná očlstenle povrchu odllatkov 1 od najmenšich zvyškov kysličnikov zliatiny odllatku ako aj: vSetkých pr1pečených časti formovacej hmoty.197 019 the device according to the invention consists in that the device consists of two morlado cans housed in a thermally insulated housing and a thermally insulating asbestos lid. The first container for the rnorled alkaline dump is provided with a heating element with an electric heating coil and is housed in a single housing. The second container for refilling is provided with a second heating element and a second electric heating coil and is housed in a second self-contained housing. According to the invention, the pickling according to the invention eliminates the direct reaction with the dental metal, does not dissipate the atomic hydrogen as in the acids and therefore does not allow the etching of the casting, after deoxidation the purity of the starting material is the same as the casting metal used. Wrap up time for the lab by accelerating the deoxidation process, ensuring hygiene and wholesome castings are more biologically valuable, more graceful and more patient-friendly. The advancement of the method and apparatus consists in delivering complete cleanliness of the surface of the castings 1 from the smallest residues of the oxide of the cast alloy, as well as all the baked parts of the molding material.

Na pripojenom výkrese je v pozdížnom řeze znázorněná zariadenie na dezoxldádu a mořeni β odllatkov z chrómkobaltových zllatln, ktorá pozoštáca z kovověj skřínky χ, v ktorej je osadené Samotová ochranná púzdro £, pričom v tomto púzdre 2 j· vložená výhřevná teleso 2 s navinutou elektrickou výhřevnou Spirálou £. Do dutiny výhřevného telese 2 J· vložená ocelová nádobka 2 s morlaclm alkalickým solným kůpelom. v teenej blízkosti bloku morlaceho alkalického kůpela je upravená, resp. umiestnené druhá Samotová púzdro £, do ktorého je upravená druhá výhřevná teleso £ s navinutou druhou elektrickou výhřevnou Spirálou 2·The attached drawing shows a longitudinal section of a device for deoxidade and pickling β of chromium-cobalt plated castings, which consists of a metal box χ in which a protective sleeve 4 is mounted, with a heating element 2 with a wound heating element inserted therein. Spiral £. Into the cavity of the heating element 2, a steel container 2 with a morlacal alkaline salt bath is inserted. in the teen near the block of the moral alkali is modified, respectively. a second self-contained housing 6 is placed into which a second heating element 6 is arranged with a second electric heating coil 2 wound therethrough.

Do druhého výhřevného telesa £ je uložená skleněná nádobka 2 * kyselinovým domorovacim kůpelom. Zvyšný priestor skřínky χ je vyplněný termolzolačnou zrnitou hmotou ifl.- archu je skřínka χ uzávretá ochranným termolzolačným azbestovým vekom 11.A glass container 2 'is placed in the second heating element 6 by an acidic doming chamber. The remainder of the box χ is filled with thermolzolating granular mass ifl.-sheet is the box χ closed with a protective thermolzolating asbestos lid 11.

Claims

According to the invention, the principle consists of two containers in a thermally insulated box and a thermolysis granulate provided with a thermolozing asbestos lid. the first container for the moral alkaline sponge is provided with an electrophoresis body with an electric heating coil and is housed in a self-supporting second container for the second container is provided with a second heating body with a second electric heating coil and is housed in the second container. in particular the development of the method and the device according to the invention is characterized in that the pickling process according to the invention results in a reaction with the dental metal, the atomic hydrogen does not emerge as in acids and therefore the etch of the peel can not occur; . In addition, the time of the lab technician to accelerate the deoxidation process is sweeping, ensures 9a hygienic safety. The trays are biologically more valuable, greasy and become more comfortable for the patient. The advancement of the process is based on the fact that it provides a complete gloss of the surface of the pellets 1 from the smallest residues of the alloyed peel as well as in the baked portions of the molding material. In the attached drawing, a deoxidation device and a chrome-cobalt chrome-plated milling device is shown in the longitudinal section, which consists of a metal casing χ in which the self-contained protective sleeve J is mounted, and in this case 2 a heating element 2 with an electric heating coil is inserted Spiral £. 00 of the heater cavity 2 · the steel core 2 with the alkaline salt bath. in the close proximity of the block of alkaline alkaline corpus is modified, respectively. a second self-contained housing 8, in which a second heating body 1 is provided with a second electric heating coil 2 wound, and a glass container 2 is placed on the second heating body 2, with an acidic condenser. the remainder of the box χ is filled with a thermolossing granular material ifl.- sheet χ closed with a protective thermolozing asbestos lid 11. PREONET OF THE INVENTION 1. spoeob of deoxidade of chromium-cobalt talc in alkaline melts in dentistry, characterized in that mor1 in alkane melt with a composition of 60 to 65% sodium hydroxide, 30 to 35% sodium nitrate and 3 to 8% sodium chloride pr1 temperature 400 to 500 ° C after pickling, peel off and then 10 to 15 percent in acidic bath sulfuric acid solution with the addition of 2 to 2.5 X sodium nitrate, heat 20 to 60 ° C for 2 to 20 minutes. 2. a device according to claim 1, characterized in that it comprises two vials (5 and 9) housed in a thermally insulated housing (1) with a thermolysis grain material (10) and provided with a thermo-asbestos lid (11), the first The container (5) for the alkaline bath is provided with a heating element (3) with an electric heating coil (4) and is housed in a self-contained housing (2), the second container (9) is provided with a second heating element (7). and a second electric heating spiral (8) and housed in a second Samot housing (6).