PL5472B1 - Casting method with the use of a volatile compressed medium. - Google Patents

Casting method with the use of a volatile compressed medium. Download PDF

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Publication number
PL5472B1
PL5472B1 PL5472A PL547224A PL5472B1 PL 5472 B1 PL5472 B1 PL 5472B1 PL 5472 A PL5472 A PL 5472A PL 547224 A PL547224 A PL 547224A PL 5472 B1 PL5472 B1 PL 5472B1
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PL
Poland
Prior art keywords
volatile
infusion
casting
metal
mold
Prior art date
Application number
PL5472A
Other languages
Polish (pl)
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Publication date
Application filed filed Critical
Publication of PL5472B1 publication Critical patent/PL5472B1/en

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Description

Znane sa juz sposoby odlewania zapo- moca powietrza sprezonego, wedlug któ¬ rych ujscie przewodu (wlew) pomiedzy ko¬ mora <ó wytsioikfeim stprejzeniu A fóima odlew¬ nicza miesci sie stale pod itowienzchnila roztopionego metalu. W urzadzeniach po¬ dobnych przytrafiaja sie czesto uszkodze¬ nia wlewu, które wywoluja uciazliwe za¬ burzenia w biegu calej instalacji. Dlatego tez proponowano juz stosowanie ruchome¬ go ukladu owego wlewu wzgledem wanny metalowej, aby wlew mozna bylo zanurzac w metal tylko podczas odlewania. Jednak otrzymywane w ten sposób odlewy nie sa jednorodne, poniewaz metal nie jest wol¬ ny od gazu i prawie zawsze zawiera peche¬ rze powietrzne.Znane sa tez sposoby, w których dla u- zyskania mozliwie jednorodnego, wolnego od zawartosci gazu odlewu, stosuje sie po¬ wietrze sprezone i próznie. Sa one jednak skomplikowane, przewlekle i kosztowne, powodujac ustawiczne przerwy i zaburze¬ nia w pracy, z powodu stosowania duzej ilosci zaworów oraz liczne narzady przy¬ rzadów wyrównawczych albo tez obraca¬ jacych sie tygli z leiwem.Przedmiot niniejszego wynalazku sta¬ nowi dalsze udoskonalenie sposobu odle¬ wania z zastosowaniem cisnienia osrodka gazowego. Stosownie do wynalazku, forma odlewnicza i komora tloczna otaczajaca wanne metalowa przy wlewie nie zanurzo¬ nym zostaja oprózniane, poczem wlew za¬ nurza sie w metal i stosuje cisnienie.Sposób ten daje moznosc dokladnegooprózniania przestrzeni tlocznej i formy lub odwrotnie, co jest koniecznie wymaga¬ ne dla otrzymania wolnego od gazu i jed¬ norodnego odlewu, zanim leiwo uzyska do¬ step do formy; poniewaz zas wlew nie przebywa stale w wannie metalowej, nie ulega on przeto szybkiemu niszczeniu.Korzysci nowego urzadzenia polegaja , ceniach* pracy, Jtanio i szybko mozliwie wol¬ nego od pecherzy jednorodnego odlewu.Zalaczony rysunek uwidocznia na fig. 1, 2 i 3 poszczególne fazy postepowania, przyczem fig. 1 wyobraza urzadzenie od¬ lewnicze.Forma odlewnicza 8 miesci sie po jed¬ nej stronie plyty 9, nad wlewem 2. Pokry¬ wa 10 formy 8 przylega szczelnie do ply¬ ty 9. Od pokrywy 10 prowadzi do pompy rozrzedzajacej rurka 6. Po drugiej stronie plyty 9 miesci sie przestrzen tloczna 1, z prowadzaca do sprezarki rura 7. Tygiel z leiwem 3 stoi na nurniku 4 tak, iz wlew 2 nie dotyka metalu. Nurnik jest przy 11 u- szczelniony.Fig. 2 podaje uklad przed podniesie¬ niem cisnienia w komorze 1. W tern polo¬ zeniu wlew 2 wchodzi w wanne metalowa.Fig. 3 uwidocznia uklad po skonczeniu odlewania.Samo odlewanie odbywa sie, w mysl wynalazku, w sposób nastepujacy. Znaj¬ dujacy sie w zbiorniku 3 metal topi sie w komorze tlocznej 1, lub tez wprowadza sie naczynie 3, napelnione plynnym metalem, do komory 1, zamykajac ja nastepnie szczelnie. Nastepnie powietrze z pod dzwonu 10 zostaje wyssane rura 6. Powsta¬ la w tymze próznia rozchodzi sie przez for¬ me 8 i wlew 2 na komore tloczna /. W ra¬ zie potrzeby forme 8 mozna zaopatrzyc w odpowiednie szczeliny lub otwory, dla po¬ laczenia przestrzeni prózniowej 5 z wle¬ wem 2.Gdy (pominiety na rysunku) waku- ometr wskaze, ze w komorze tlocznej 1 i prózniowej 5 panuje juz zadana próznia, wtedy na nurniku 4 podejmujemy naczy¬ nie z leiwem 3 tak, by wlew 2 znalazl sie w wannie metalowej (fig. 2). Nastepnie za- pomoca rury 7 podnosimy cisnienie w ko¬ morze tlocznej 1 i metal wtlacza sie przez wlew 2 do formy 8.Nie wykraczajac z ram wynalazku, mozna sie obejsc bez dzwonu 10, i w tym wypadku rura rSisaca 6 Wpuszcza sie badz- to wprost w forme 8, badz w komore tlocz¬ na 1. W ostatniej tej odmianie trzeba na¬ turalnie zamknac rure 6 przed podniesie¬ niem cisnienia w komorze 1. PLCompressed air casting methods are already known, according to which the opening of the conduit (infusion) between the chamber and the casting mold is constantly under the new molten metal. In similar devices often damage to the filler, which causes bothersome disturbances in the course of the entire installation. Therefore, it has already been proposed to provide a movable arrangement of this gating device with respect to a metal bath, so that the gating can only be immersed in the metal during casting. However, the castings obtained in this way are not homogeneous because the metal is not gas free and almost always contains air bubbles. There are also known methods whereby to obtain as homogeneous, gas-free castings as possible, compressed air and vacuum. However, they are complicated, time-consuming and costly, causing constant interruptions and disturbances in work due to the use of a large number of valves and numerous equalizing devices or rotating crucibles with a funnel. The subject of the present invention is a further improvement. the method of casting using the pressure of a gas medium. According to the invention, the casting mold and the pressure chamber surrounding the metal tank are emptied when the inlet is not submerged, and the infusion is then immersed in the metal and pressure is applied. This method enables the exact emptying of the pressure space and the mold or vice versa, which is absolutely necessary. to obtain a gas-free and homogeneous casting before the casting material reaches the mold; Since the infusion does not stay in the metal tub, it does not deteriorate quickly. The advantages of the new device consist in the reduction of labor, Jtanio and a homogeneous casting as quickly as possible, free from blisters. The attached drawing shows the individual figures in Figs. 1, 2 and 3. 1 is represented by a casting device. The casting mold 8 is located on one side of the plate 9, above the mouth 2. The cover 10 of the mold 8 is tightly attached to the plate 9. From the cover 10 it leads to the pump the dilution tube 6. On the other side of the plate 9 there is the delivery space 1, with the tube 7 leading to the compressor. The crucible with the funnel 3 stands on the plunger 4 so that the filler 2 does not touch the metal. The plunger is tightened at 11:00. 2 passes the circuit before increasing the pressure in chamber 1. At this position, the inlet 2 enters the metal tub. 3 shows the arrangement after the casting is finished. The casting itself takes place, according to the invention, as follows. The metal present in the vessel 3 melts in the pressure chamber 1, or the vessel 3, filled with liquid metal, is introduced into the chamber 1, then sealed. Then the air from under the bell 10 is sucked out from the tube 6. The vacuum created in this propagates through the form 8 and the infusion 2 onto the delivery chamber /. If necessary, the mold 8 can be provided with suitable slots or openings to connect the vacuum space 5 with the inlet 2. When the vacuum gauge (omitted in the drawing) indicates that the set pressure chamber 1 and vacuum chamber 5 are already present vacuum, then on the plunger 4 we pick up the vessel with the funnel 3 so that the inlet 2 is in the metal tub (Fig. 2). Then, using the pipe 7, we raise the pressure in the pressure chamber 1 and the metal is forced through the inlet 2 into the mold 8. Without going beyond the scope of the invention, one can do without the bell 10, and in this case the rSisaca 6 pipe is inserted directly in the mold 8, or in the pressure chamber 1. In the latter, the pipe 6 must be closed naturally before the pressure in chamber 1 is increased.

Claims (2)

1. Zastrzezenie patentowe. Sposób odlewania z zastosowaniem o- srodka sprezonego lotnego zapomoca pro¬ wadzacego do formy wlewu, wchodzacego do komory tlocznej, otaczajacej naczynie z leiwem, znamienny tem, ze forma i ko¬ mora tloczna oprózniaja sie przy nieza- nurzonym w kapieli matalowej wlewie, po- czem wlew zanurza sie w kapieli metalo¬ wej i nastepnie cisnienie w przestrzeni ja otaczajacej stopniowo sie podnosi. Wilhelm Klepsch. Zasteipca: M, Skrzypkowski, rzecznik patentowy.Do opisu patentowego Nr 5472. %S.l Rt/5.1. Patent claim. The method of pouring with the use of a volatile compressed medium leading to the form of an infusion, entering the pressure chamber, surrounding the vessel with the funnel, characterized in that the mold and the pressure chamber are emptied by the infusion, which is not immersed in the metal bath, the infusion is immersed in the metal bath and then the pressure in the surrounding space gradually rises. Wilhelm Klepsch. Zasteipca: M, Skrzypkowski, patent attorney. To the patent description No. 5472.% S.l Rt / 5. 2. OJ Rv&--3- Druk L. Boguslawskiego, Warszawa. PL2. OJ Rv & - 3- Print by L. Boguslawski, Warsaw. PL
PL5472A 1924-08-01 Casting method with the use of a volatile compressed medium. PL5472B1 (en)

Publications (1)

Publication Number Publication Date
PL5472B1 true PL5472B1 (en) 1926-08-31

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