EP3511091A1 - Système de transfert de fusion permettant de recevoir, de transporter et d'acheminer un métal en fusion - Google Patents

Système de transfert de fusion permettant de recevoir, de transporter et d'acheminer un métal en fusion Download PDF

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Publication number
EP3511091A1
EP3511091A1 EP18151506.5A EP18151506A EP3511091A1 EP 3511091 A1 EP3511091 A1 EP 3511091A1 EP 18151506 A EP18151506 A EP 18151506A EP 3511091 A1 EP3511091 A1 EP 3511091A1
Authority
EP
European Patent Office
Prior art keywords
container
pressure
molten metal
transfer system
melt
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Withdrawn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
EP18151506.5A
Other languages
German (de)
English (en)
Inventor
Florian KULAWIK
Theodoor Van Der Hoeven
Michael Viedenz
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.)
Strikowestofen GmbH
Original Assignee
Strikowestofen GmbH
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 Strikowestofen GmbH filed Critical Strikowestofen GmbH
Priority to EP18151506.5A priority Critical patent/EP3511091A1/fr
Priority to US16/961,280 priority patent/US20210138537A1/en
Priority to EP19700239.7A priority patent/EP3737516A1/fr
Priority to PCT/EP2019/050706 priority patent/WO2019138080A1/fr
Publication of EP3511091A1 publication Critical patent/EP3511091A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D46/00—Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/32—Controlling equipment
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0028—Devices for monitoring the level of the melt

Definitions

  • the present application relates to a melt transfer system for receiving, transporting and conveying a molten metal. Furthermore, the present invention relates to a corresponding method.
  • the JP4190786 shows, for example, a transport container to which molten metal can be supplied.
  • the molten metal can be transported and conveyed out of the container by means of a set pressure difference between the interior of the container and the environment.
  • air can be introduced into the interior of the container under pressure.
  • the molten metal in the container can with a Pressure can be applied so that the molten metal in a connecting the interior of the container and the environment flow channel, in particular a riser, rises and can be conveyed out of the container.
  • the pressure is typically increased steadily, so that a promotion of the molten metal takes place through the flow channel or the riser to the outside.
  • the outwardly transported molten metal may add air when the container is emptied.
  • the hot molten metal can be greatly accelerated, so that it can come at an outlet of the holding furnace to an uncontrolled ejection of the metal melt.
  • Such hot molten metal splashes are particularly dangerous for operators, but also for sensitive devices that are in the vicinity of the portable container dangerous.
  • the filling operation and the emptying operation of the melt transfer device are controlled by a control unit which analyzes weight data of the melt transfer device. Based on the weight of the melt transfer device, it can be determined how much molten metal is present in the container of the device. If it is determined by the control unit that the molten metal inside the melt transfer device is running low, an emptying operation of the container of the melt transfer device is ended.
  • the present invention has for its object to propose an alternative melt-transfer system.
  • One of the objects of the present invention is, inter alia, to propose a melt-transfer system which increases the working safety for an operator and which facilitates the work for an operator.
  • the present invention may be based on the object of proposing a corresponding method which achieves this object.
  • the melt transfer system With the melt transfer system, a hot molten metal can be picked up, transported and transferred to another container or into an oven.
  • the melt transfer system comprises for this purpose a transportable container for receiving the molten metal, a container lid arranged on the container for airtight sealing of the container and a flow channel.
  • the container lid preferably has a closable filling opening for filling the container with the molten metal and a corresponding filling opening lid.
  • the container lid may alternatively comprise a filling device for filling the container with molten metal through a filling tube or through the flow channel.
  • a pressure difference between a pressure prevailing in the container and a pressure prevailing outside the ambient molten metal can be forced out of the container through the flow channel or the riser pipe and conveyed out of the container.
  • the pressure differential is typically increased.
  • the delivery process can be interrupted or terminated by reducing or completely eliminating the pressure difference.
  • Control of the pressurization and adjustment of the pressure differential may be manually adjustable by an operator.
  • a control unit controls the emptying of the container by adjusting the pressure difference between the first and the second end of the flow channel.
  • the control unit controls, for example, a pneumatic unit, which is designed, the container interior with an air pressure to act on.
  • the melt transfer system may further include a measuring unit having at least one pressure sensor for measuring a pressure in the container during conveyance and the control unit for controlling the conveyance of the molten metal from the container through the flow channel.
  • the control unit can be set up and designed to stop the molten metal delivery when the measured pressure drops.
  • the control unit may be configured to determine a temporal pressure profile from the pressure measured by the measuring unit.
  • molten metal can be conveyed out of the container through the flow channel.
  • the control unit adjusts the pressure difference between the first and the second end of the flow channel.
  • a pressure can be determined in the container, preferably by means of the control unit and a measuring unit comprising at least one pressure sensor.
  • the pressure can be measured, for example, directly in the container or in the above-mentioned pneumatic unit.
  • the pressure sensors are arranged such that they measure the pressure of a container interior in which the molten metal is located.
  • the pressure sensors preferably do not come into contact with the molten metal.
  • the at least one pressure sensor can be arranged on an inner side of the container lid or in a pneumatic unit. From the measured pressure can be determined by the control unit, the pressure in the container.
  • the molten metal discharge may be stopped when a pressure difference between a pressure determined at a first time and a pressure determined at a second time is negative, wherein preferably the negative pressure difference is greater in magnitude than a predetermined threshold value.
  • the first time is earlier than the second time, the second time is later than the first time.
  • the pressure difference is determined by the pressure at the first time is subtracted from the pressure to the second time.
  • the threshold value is preferably at least 1 mbar, more preferably at least 2 mbar, the threshold value being able to be selected as a function of the time interval which is present between the first and the second time interval the second time.
  • a temporal pressure curve can be determined.
  • the control unit can be set up and configured to determine this temporal pressure profile.
  • This temporal pressure curve can be recorded and monitored, for example, by the control unit designed for this purpose and set up for this purpose.
  • the control unit typically controls that, for the continuous emptying of the container, air is continuously supplied to the container, so that the pressure in the container increases. When the measured pressure in the container drops, the molten metal production can be stopped.
  • the control unit may be arranged and configured to record and register such a pressure drop and then stop the molten metal production.
  • the control unit can control the pneumatic unit such that it does not further pressurize and / or vent the container so that the pressure difference remains the same or falls.
  • the control unit is designed and set up to carry out the control process steps described below and to stop the molten metal delivery, in particular by controlling the pneumatic unit. Based on the temporal pressure curve can be determined by the control unit, a pressure difference between at least two consecutive pressures. The molten metal delivery can be stopped, in particular, when the pressure difference is negative, ie when the pressure determined later in time is lower than the previously determined pressure, or if the average of two or more later detected pressures is less than the mean of two or more more pressures determined earlier in time.
  • the pressures can be measured at defined time intervals. Preferably, the distances are the same.
  • the time intervals between the pressure measurements may be, for example, a maximum of 500 ms, preferably a maximum of 100 ms, particularly preferably a maximum of 50 ms.
  • the control unit may be designed and set up to perform the pressure measurement in the time intervals and to register the pressure values.
  • the control unit can be designed and set up to adjust the time intervals of the measurements.
  • the time derivative dp / dt of the pressure profile can be determined.
  • the molten metal delivery can be stopped, in particular, when the derivative dp / dt is negative.
  • a threshold S may be determined prior to or during the molten metal feed so that molten metal production is stopped only when the derivative is less than the threshold S, where the threshold S is less than zero.
  • a criterion for stopping molten metal production can therefore be if dp / dt ⁇ 0 or if dp / dt ⁇ S ⁇ 0.
  • the threshold value S can be determined empirically, for example.
  • a threshold value has the advantage that slight pressure fluctuations, for example due to suction effects, friction losses and / or measurement inaccuracies, do not necessarily lead to an immediate shutdown of the molten metal feed.
  • the threshold value should be selected so that low pressure fluctuations do not cause a shutdown; on the other hand, it should be noted with the threshold that the metal melt level within the container is near the first end of the flow channel.
  • the molten metal delivery may be shut off when air enters the first end of the flow channel and before the air reaches the second end of the flow channel. In the temporal pressure curve, this time, when air enters the first end of the flow channel, is characterized by a pressure drop.
  • the pressure curve at this very time has a time derivative, the amount is greater than 1 mbar / s.
  • a threshold value can therefore advantageously amount to at least 1 mbar / s, preferably at least 5 mbar / s, particularly preferably at least 10 mbar / s.
  • suction effects or manual, brief interruptions of production can be taken into account with the threshold value and incorporated into a threshold determination.
  • a deviation or tolerance of the shutdown is preferably at most 4% of a filling weight of the container with molten metal. Particularly preferably, a deviation is at most 2% of a filling weight of the container with molten metal.
  • a second pressure can be measured at a second location.
  • the second measured pressure preferably correlates with a pressure in the container, with a pressure in the pneumatic unit for setting a pressure difference between an ambient pressure and a pressure in the container and / or with a pressure in the flow channel.
  • the second pressure may be compared to the first measured pressure for correlation.
  • At least two, preferably at least three, temporally successive measured pressures can be averaged.
  • the time derivative dp / dt can then be determined on the basis of the averaged pressures.
  • the derived pressure curve can be smoothed, so that fluctuations and measured value outliers can be counteracted.
  • the control unit can preferably be designed and configured to average the measured values and / or to determine a temporal pressure profile based on the averaged measured values.
  • the temporal pressure curve can also be filtered in terms of its frequency.
  • a band-pass filter in particular a band-pass filter with those with the frequencies 5 Hz and 25 Hz can be used.
  • the amplitude of the filter output signal can be used as a shutdown criterion.
  • the control unit may be configured and configured to control a molten metal delivery on the basis of the output signal of the bandpass filter.
  • the pressure difference between a pressure prevailing in the container and a prevailing ambient pressure can be reduced, in particular as soon as the determined derivative of the pressure curve is negative and is preferably greater in magnitude than the previously defined threshold value.
  • the control unit may be arranged and configured to adjust this pressure difference and in particular to reduce the stopping of molten metal delivery.
  • control unit may be designed and configured to determine from the measured pressure the time pressure curve p (t), to determine the time derivative of the pressure curve dp / dt and to stop the molten metal production if the derivative of the pressure profile dp / dt is negative and preferably if the derivative is larger in size is the previously set threshold.
  • a remainder of the melt typically remains in the container after the described discharge process. It may turn out that this remainder of the melt blocks or even destroys the flow channel after it has cooled and solidified.
  • the blocking of the first end of the flow channel can be particularly problematic in a renewed heating of the solidified melt, since the flow channel, in particular in the form of a riser, during heating of the proposed melt-transfer system can advantageously serve as a chimney. It may therefore be an object of the invention to prevent this problem.
  • the melt transfer system may comprise a tilting device for tilting the container.
  • the container can be tilted with the tilting device such that the remaining melt at the bottom of a container inside flows into a side facing away from the first end of the flow channel.
  • the first end of the flow channel may thus be moved upwardly with respect to a plane on which the melt transfer system is located.
  • the remaining melt may release the first end of the flow channel and solidify in the container.
  • the flow channel in particular in the form of a riser, thus be used as a chimney.
  • melt-transfer system can thus have the task of improving a molten metal transfer.
  • the heating opening can be, for example, at most half the size of the filling opening.
  • the heating opening may preferably have about 1/3 of the size of the filling opening, particularly preferably about 1/6 of the size of the filling opening.
EP18151506.5A 2018-01-12 2018-01-12 Système de transfert de fusion permettant de recevoir, de transporter et d'acheminer un métal en fusion Withdrawn EP3511091A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18151506.5A EP3511091A1 (fr) 2018-01-12 2018-01-12 Système de transfert de fusion permettant de recevoir, de transporter et d'acheminer un métal en fusion
US16/961,280 US20210138537A1 (en) 2018-01-12 2019-01-11 Bath transfer system for receiving, transporting and conveying molten metal
EP19700239.7A EP3737516A1 (fr) 2018-01-12 2019-01-11 Système de transfert de bain de fusion destiné à recevoir, transporter et acheminer un bain de fusion
PCT/EP2019/050706 WO2019138080A1 (fr) 2018-01-12 2019-01-11 Système de transfert de bain de fusion destiné à recevoir, transporter et acheminer un bain de fusion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18151506.5A EP3511091A1 (fr) 2018-01-12 2018-01-12 Système de transfert de fusion permettant de recevoir, de transporter et d'acheminer un métal en fusion

Publications (1)

Publication Number Publication Date
EP3511091A1 true EP3511091A1 (fr) 2019-07-17

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP18151506.5A Withdrawn EP3511091A1 (fr) 2018-01-12 2018-01-12 Système de transfert de fusion permettant de recevoir, de transporter et d'acheminer un métal en fusion
EP19700239.7A Pending EP3737516A1 (fr) 2018-01-12 2019-01-11 Système de transfert de bain de fusion destiné à recevoir, transporter et acheminer un bain de fusion

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19700239.7A Pending EP3737516A1 (fr) 2018-01-12 2019-01-11 Système de transfert de bain de fusion destiné à recevoir, transporter et acheminer un bain de fusion

Country Status (3)

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US (1) US20210138537A1 (fr)
EP (2) EP3511091A1 (fr)
WO (1) WO2019138080A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020003065A1 (de) 2020-05-24 2021-11-25 BorgWarner Turbo Systems Worldwide Headquarters GrnbH Schmelz- und Gießverfahren und kombinierte Schmelz- und Gießofenanlage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4190786B2 (ja) 2002-03-29 2008-12-03 株式会社豊栄商会 溶融金属供給システム、溶融金属供給装置及び車輌

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3058180A (en) * 1961-10-11 1962-10-16 Modern Equipment Co Apparatus for pouring molten metal
US3499580A (en) * 1968-07-02 1970-03-10 Frank B Smith Pressure pour apparatus and component thereof
DE4029386C2 (de) * 1990-09-12 1993-12-16 Strikfeldt & Koch Verfahren und Vorrichtung zum Dosieren von Flüssigkeiten, insbesondere von geschmolzenem Metall
AU652795B2 (en) * 1991-01-18 1994-09-08 Isover Saint-Gobain Process and device for obtaining mineral fibres
US20050263260A1 (en) * 2004-05-27 2005-12-01 Smith Frank B Apparatus and method for controlling molten metal pouring from a holding vessel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4190786B2 (ja) 2002-03-29 2008-12-03 株式会社豊栄商会 溶融金属供給システム、溶融金属供給装置及び車輌

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Publication number Publication date
WO2019138080A1 (fr) 2019-07-18
EP3737516A1 (fr) 2020-11-18
US20210138537A1 (en) 2021-05-13

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