EP2180281A1 - Four de distribution de métal liquide - Google Patents

Four de distribution de métal liquide Download PDF

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Publication number
EP2180281A1
EP2180281A1 EP08380305A EP08380305A EP2180281A1 EP 2180281 A1 EP2180281 A1 EP 2180281A1 EP 08380305 A EP08380305 A EP 08380305A EP 08380305 A EP08380305 A EP 08380305A EP 2180281 A1 EP2180281 A1 EP 2180281A1
Authority
EP
European Patent Office
Prior art keywords
dispensing
liquid metal
oven
tank
dispensing tube
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.)
Withdrawn
Application number
EP08380305A
Other languages
German (de)
English (en)
Inventor
Santiago Michael Santos
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.)
Krown Servicios Integrales De Fundicion Sa
Original Assignee
Krown Servicios Integrales De Fundicion Sa
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 Krown Servicios Integrales De Fundicion Sa filed Critical Krown Servicios Integrales De Fundicion Sa
Priority to EP08380305A priority Critical patent/EP2180281A1/fr
Publication of EP2180281A1 publication Critical patent/EP2180281A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/14—Charging or discharging liquid or molten material

Definitions

  • This invention refers to a dispensing oven used for keeping metals molten and for dispensing these metals to injection machines or moulds, which form the items.
  • the invention is of preferential application for aluminium ovens without a crucible.
  • the purpose of the invention is the development of a dosing oven with a means of dispensing that enables a reduction in the time required to supply liquid metal to the injection machine or mould and at the same time is strategically situated and designed in order to avoid breakdowns and therefore unwanted downtime.
  • the purpose of the invention is also to enable the dosing oven to reduce heat loss, to supply an exact temperature to the casting and reduce oxidation.
  • Dosing ovens generally have at least one exit channel on the outside of the oven through which molten metal leaves towards the mould or injection machine used to shape the final item. Connected to this exit channel, the oven has a dispensing tube that is largely submerged inside the oven tank and through which the liquid metal ascends towards the exit channel.
  • These dispensing tubes are subject to high temperatures and to sudden changes in temperatures and can receive unwanted blows, for example during cleaning and maintenance operations, that may give rise to breakages.
  • Breakage of the dispensing tube implies the need to stop the oven for repair, therefore rendering it inoperative for a period of time, making it non-productive.
  • T1 is the response time from when the measurement system detects the first appearance of metal from the tank in the channel, sends the signal to the pressure system and the ejected liquid metal appears in the channel
  • T2 is the time of flow of metal in the channel
  • T3 is the dispensing time
  • the time during which the liquid metal passes through the channel implies that the metal can cool in contact with the air and unwanted oxidation can take place.
  • the dosing oven that is the object of this invention enables a reduction in the time per item and therefore an increase in productivity, and at the same time, it improves reliability. This is the consequence of incorporating a dispensing tube that is totally external to the oven tank, in which this dispensing tube is inclined upwards and has a discharge mouth from which the liquid metal is directly poured into the injection machine or mould.
  • This dispensing tube enables the pouring of liquid metal directly, without the use of any channel, as the liquid metal is ready to exit to the outside from the discharge mouth. In this way, the communication channel between the oven and the injection machine or mould is considerably reduced.
  • the tank is normally pressurised and the means of applying pressure are those that control the exit of liquid metal.
  • the fact of having an exclusively external dispensing tube enables the incorporation of a partition inside the tank that defines two inter-communicating chambers; a first chamber, closest to the dispensing tube and a second chamber where the liquid metal is loaded from the outside. In this way, the first chamber can have a level of liquid metal that is higher than that in the second chamber.
  • the liquid metal of the first chamber can be constantly close to the discharge mouth for its immediate exit to the injection machine or mould, located nearby. In this way, a considerable reduction in response times can be achieved.
  • the first chamber can have an access point on top covered by a lid.
  • the dispensing tube can be heated or not. The fact that it is heated allows the maintenance of the temperature of the liquid metal over the whole length of the tube until it finally emerges through the discharge mouth without loss of heat, thereby achieving exact temperature control of the metal on casting.
  • the fact that the dispensing tube is closed implies that the liquid metal is not in contact with air, in contrast to the situation with a channel, and therefore the liquid metal does not oxidise.
  • the control system for dispensing liquid metal can be a conventional system incorporating a contact sensor located close to the discharge mouth or it may be the system described by the applicant of this invention in the European patent application titled "Dose control system for a liquid metal dispensing oven”.
  • Figure 1 shows that the dispensing oven has a tank (1) storing liquid metal and projecting from its external surface with an ascending inclination is a dispensing tube (2) furnished with a discharge mouth (3) from which liquid metal is supplied directly to a mould or injection machine.
  • the dispensing tube (2) shown in Figure 1 has means of heating (4) that controls the temperature of the liquid metal inside.
  • the tank (1) consists of two inter-connected chambers (5, 6), in this case separated by a partition (7).
  • the first chamber (5) is connected to the dispensing tube (2) in order to allow the liquid level in the first chamber (5) to be close to the discharge mouth and higher than the liquid level in the second chamber (6).
  • the tank (1) has an access point at the top (8) and a lid (9) connected with the first chamber (5) in order to facilitate access to the inside.
  • the dispensing oven represented in Figure 1 can maintain liquid metal on two levels, in which the liquid metal in the first chamber (5) is normally at the same level as the position of the discharge mouth (3) and so ready to be supplied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices For Dispensing Beverages (AREA)
EP08380305A 2008-10-27 2008-10-27 Four de distribution de métal liquide Withdrawn EP2180281A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08380305A EP2180281A1 (fr) 2008-10-27 2008-10-27 Four de distribution de métal liquide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08380305A EP2180281A1 (fr) 2008-10-27 2008-10-27 Four de distribution de métal liquide

Publications (1)

Publication Number Publication Date
EP2180281A1 true EP2180281A1 (fr) 2010-04-28

Family

ID=40445455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08380305A Withdrawn EP2180281A1 (fr) 2008-10-27 2008-10-27 Four de distribution de métal liquide

Country Status (1)

Country Link
EP (1) EP2180281A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221379A (en) * 1962-02-14 1965-12-07 Ajax Magnethermic Corp Furnaces
EP0682575A1 (fr) * 1993-02-08 1995-11-22 Seva Societe Procede de fabrication d'un organe chauffant de transfert de metal liquide, organe chauffant, son application et son utilisation.
JP2007313554A (ja) * 2006-05-29 2007-12-06 Toshiba Mach Co Ltd 給湯量制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221379A (en) * 1962-02-14 1965-12-07 Ajax Magnethermic Corp Furnaces
EP0682575A1 (fr) * 1993-02-08 1995-11-22 Seva Societe Procede de fabrication d'un organe chauffant de transfert de metal liquide, organe chauffant, son application et son utilisation.
JP2007313554A (ja) * 2006-05-29 2007-12-06 Toshiba Mach Co Ltd 給湯量制御装置

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