EP0916435B1 - Four de coulée pour moulage automatique - Google Patents
Four de coulée pour moulage automatique Download PDFInfo
- Publication number
- EP0916435B1 EP0916435B1 EP19970500195 EP97500195A EP0916435B1 EP 0916435 B1 EP0916435 B1 EP 0916435B1 EP 19970500195 EP19970500195 EP 19970500195 EP 97500195 A EP97500195 A EP 97500195A EP 0916435 B1 EP0916435 B1 EP 0916435B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- furnace
- metal
- casting
- gas
- casting furnace
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D39/00—Equipment for supplying molten metal in rations
- B22D39/06—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by controlling the pressure above the molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
Definitions
- Loading molds on automatic molding lines is mainly carried out by means of gas pressurized furnaces inert, and fitted with electric induction heating. Although there is great variety of systems, this type of oven presents a common problem, associated with the maintenance of inductors for wear or protrusion of the refractory in the coil area.
- This material has the particularity of incorporating into its composition a quantity magnesium, which reacts with certain elements present in the refractory and clean metal. This produces compounds with a melting point. which adhere to the walls of the refractory, especially at the points hotter and greater metal circulation.
- the coupling of the inductors introduces a factor of complexity in the system which prevents the furnace from being switched off, otherwise by running big risks.
- the inductor has the sole function of retaining casting at approximately the molding temperature, and faced with the problems described, which the applicant has deduced that they arise from the use of inductors, it is proposed in this application to replace the induction heating with a heating produced by a high-power thermal plasma.
- the transfer thermal occurs in this case by means of the plasma arc generated by the electric current and stabilized with the same inert gas (argon or nitrogen) which can be the same as that used to pressurize the oven.
- US Patent 5,291,940 shows a tipping bucket in which the energetic contribution to the liquid mass of the metal is made by a plasma torch which operates in the open air, and which acts directly on the metal creating agitation currents which originate pollution from the point of view metallurgical.
- the application of the invention shows a casting furnace in which the energy supply to the liquid mass of the metal is made by a plasma torch, which operates in a closed hood, with gas under pressure, which is both plasma-generating and inert with respect to cast metal (for example N 2 ).
- nitrogen in gaseous form (N 2 ) breaks down into plasma N, which provides energy to the metal, so the action of the plasma torch on the metal is indirect.
- the casting furnace also has means for introducing and keep the gas under pressure in the oven.
- the present invention recommends a casting furnace for molding automatic improved, including in particular a pouring-nozzle hole of loading of the metal in the pre-inoculation state, a pressurization gas in the bucket and, at the very least, a metal pouring and loading nozzle molding and characterized by the fact that above the level of the metal in the grab are arranged in the casting furnace, at the very least, a plasma torch thermal stabilized preferably using the same gas as that used to pressurize the oven and at least one gas inlet / outlet, said gas or gases being both plasma / s and inert / s with respect to the cast metal.
- Figure 1 is a vertical sectional view of the molding furnace already known with a superimposition of a practical realization of the object of the invention, which makes it easier to understand.
- a conventional oven consists of a tap hole (1) for the loading of metal, for example at 1430 ° C., already treated, for example, with ferro-silicon-magnesium, which descends through the loading nozzle (2) to the bucket (3) where an inductor (4) is provided which provides energy maintaining the casting at the desired temperature.
- the bucket (3) is closed by the cover (5) in which an inlet / outlet (11) of a pressurization gas (g), for example N 2, is made .
- a pressurization gas for example N 2
- salts tend to accumulate, for example magnesium silicates which impede circulation of casting and thermal transmission.
- the invention eliminates the inductor (9) with all its consequences and introduces one or more plasma torches as a fundamental element (10).
- the torch (10) is given a movement so that the plasma jet moves on said surface (s).
- the inert gas (N 2 , argon, etc.) used with the plasma can be the same as that of pressurization.
- the lighting of the torch (10) can be delayed as desired.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Furnace Details (AREA)
Description
Claims (5)
- Four de coulée pour moulage automatique comportant, au minimum, un trou de coulée-tuyère de chargement du métal en état de pré-inoculation, un gaz de pressurisation dans la benne et, pour le moins, d'une tuyère de coulée et de chargement du métal de moulage, se caractérisant par le fait qu'au dessus du niveau du métal dans la benne sont disposés dans le four de coulée, au moins, une torche à plasma thermique stabilisé de préférence en employant le même gaz que celui utilisé pour pressuriser le four, ledit ou lesdits gaz étant á la fois plasmagénes et inertes vis á vis du métal coulé et, au minimum, une entrée/sortie de gaz.
- Four de coulée pour moulage automatique, selon revendication antérieure, se caractérisant par le fait que le four de coulée dispose au dessus du niveau du métal dans la benne d'une lance thermique à oxycombustion.
- Four de coulée pour moulage automatique, selon revendications antérieures, se caractérisant par le fait que le jet énergétique de la torche au plasma se déplace au dessus du niveau du métal.
- Four de coulée pour moulage automatique, selon revendications antérieures, se caractérisant par le fait que la torche au plasma se met en place sur le couvercle du four.
- Procédé automatique de moulage, se caractérisant par le fait que dans un four de moulage décrit dans les revendications 1, 2, 3, et 4, on prévoit que compte tenu que le four de coulée est froid, on le préchauffe à la lance thermique à oxycombustion jusqu'à une température appropriée pour recevoir le métal liquide, en procédant si besoin postérieurement, le métal étant déjà dans le four, à l'apport énergétique de maintien à température au moyen de la torche au plasma thermique et disposant aussi des moyens pour introduire et maintenir le gaz sous pression dans le four.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19970500195 EP0916435B1 (fr) | 1997-11-18 | 1997-11-18 | Four de coulée pour moulage automatique |
| DE1997619035 DE69719035T2 (de) | 1997-11-18 | 1997-11-18 | Giessofen für die automatisches Abgiessen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19970500195 EP0916435B1 (fr) | 1997-11-18 | 1997-11-18 | Four de coulée pour moulage automatique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0916435A1 EP0916435A1 (fr) | 1999-05-19 |
| EP0916435B1 true EP0916435B1 (fr) | 2003-02-12 |
Family
ID=8230100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19970500195 Expired - Lifetime EP0916435B1 (fr) | 1997-11-18 | 1997-11-18 | Four de coulée pour moulage automatique |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0916435B1 (fr) |
| DE (1) | DE69719035T2 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2168930B2 (es) * | 1999-12-23 | 2003-06-16 | Fundacion Inasmet | Horno de colada para moldeo |
| CN112946013B (zh) * | 2021-01-14 | 2022-10-04 | 永嘉工力科技有限公司 | 一种铸造合金热分析方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1288760B (de) * | 1966-06-14 | 1969-02-06 | Coupette | Verfahren zur Steuerung von Temperatur und Stahlanalyse beim Stranggiessen und Vorrichtung dazu |
| JPS59202142A (ja) * | 1983-04-30 | 1984-11-15 | Nippon Steel Corp | タンデイツシユ浸漬ノズルの加熱方法 |
| JPS62289363A (ja) * | 1986-06-09 | 1987-12-16 | Kawasaki Steel Corp | 加圧式注湯炉 |
| US5291940A (en) * | 1991-09-13 | 1994-03-08 | Axel Johnson Metals, Inc. | Static vacuum casting of ingots |
-
1997
- 1997-11-18 DE DE1997619035 patent/DE69719035T2/de not_active Expired - Fee Related
- 1997-11-18 EP EP19970500195 patent/EP0916435B1/fr not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0916435A1 (fr) | 1999-05-19 |
| DE69719035D1 (de) | 2003-03-20 |
| DE69719035T2 (de) | 2003-12-04 |
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