EP1898170A2 - Dispositif destiné au traitement chimique et/ou physique de pièces - Google Patents

Dispositif destiné au traitement chimique et/ou physique de pièces Download PDF

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Publication number
EP1898170A2
EP1898170A2 EP07017379A EP07017379A EP1898170A2 EP 1898170 A2 EP1898170 A2 EP 1898170A2 EP 07017379 A EP07017379 A EP 07017379A EP 07017379 A EP07017379 A EP 07017379A EP 1898170 A2 EP1898170 A2 EP 1898170A2
Authority
EP
European Patent Office
Prior art keywords
treatment chamber
parts
treatment
gas
chamber
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Withdrawn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
EP07017379A
Other languages
German (de)
English (en)
Other versions
EP1898170A3 (fr
Inventor
Hanf Alexander
Francisco Lopez Lopez
Peter Jacobus Vervoort
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.)
ELINO INDUSTRIE-OFENBAU GMBH
Original Assignee
Elino Industrie-Ofenbau Carl Hanf & Co KG 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
Priority claimed from DE200610041625 external-priority patent/DE102006041625A1/de
Priority claimed from DE200610041626 external-priority patent/DE102006041626A1/de
Application filed by Elino Industrie-Ofenbau Carl Hanf & Co KG GmbH filed Critical Elino Industrie-Ofenbau Carl Hanf & Co KG GmbH
Publication of EP1898170A2 publication Critical patent/EP1898170A2/fr
Publication of EP1898170A3 publication Critical patent/EP1898170A3/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Withdrawn legal-status Critical Current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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
    • 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/04—Circulating atmospheres by mechanical means

Definitions

  • the present invention relates to an apparatus for the physical and / or chemical treatment of parts using a carrier and / or reaction gas, in particular for the debinding of molded parts, in which the parts to be treated are guided along a conveying path through the device and thereby with the carrier and / or reaction gas are acted upon.
  • Such devices are known as industrial furnaces and serve for the treatment of parts (workpieces), namely for the physical treatment, in particular thermal treatment, and / or chemical treatment of these parts.
  • a carrier and / or reaction gas are used.
  • a carrier gas which serves as a heat transfer medium and through which the parts are heated.
  • a reaction gas is used, with which the parts to be treated react and thereby be chemically converted.
  • both a carrier gas and a reaction gas are used to create an atmosphere in the device with which both physical and chemical treatments can be performed.
  • Such a device is a device for debinding moldings.
  • Such moldings have after pressing, injection molding, etc. binder residues, which must be removed, for example, before performing a subsequent sintering process.
  • a carrier gas and a reaction gas are used, the latter chemically reacting with the binder, wherein the corresponding reaction products are removed from the apparatus and flared.
  • Such devices generally have a treatment chamber passing from the feed end to the discharge end.
  • the carrier gas and / or reaction gas is introduced at a location in the front region of the device in this, and the resulting exhaust gases are withdrawn at the rear of the device from this.
  • the parts to be treated are normally guided in batch carriers along a conveying path through the device, wherein for conveying, for example, a belt conveyor, a sliding track or roller conveyor with bumper etc. can be used.
  • the device may have a conveying path or a plurality of conveyor paths arranged next to one another.
  • Such devices having a single treatment chamber have the disadvantage that the parts to be treated along their conveying path only with a single gas atmosphere can be treated, which loses its effectiveness with increasing conveying distance as a result of mixing with the resulting exhaust gases. This produces over the length of the device temperature and / or gas concentration gradients that are undesirable and affect the treatment of the parts.
  • the present invention has for its object to provide a device of the type reproduced, with which during the promotion of the parts by the device whose treatment can be varied.
  • the inventively designed device thus has in the conveying direction of the parts at least two successively arranged and separate treatment chambers, so that in these treatment chambers different treatments of the parts can be performed.
  • each treatment chamber introducers for the Carrier gas and / or reaction gas, ie each treatment chamber is acted upon independently of the other chamber with the appropriate gas.
  • the carrier gas and / or reaction gas is circulated via a circulating device associated with each treatment chamber, so that the corresponding gas is applied to the parts passing through the treatment chamber.
  • gas-conducting devices are provided in each treatment chamber, which effect a loading of the parts with the corresponding gas transversely to the conveying direction of the parts.
  • the embodiment of the device according to the invention a number of advantages can be achieved.
  • independent treatment chambers are created in which various treatments can be performed.
  • the type and composition of the gases introduced into each treatment chamber may be different from one treatment chamber to another.
  • the temperature can vary from treatment chamber to treatment chamber.
  • the most varied treatment parameters can be set in the conveying direction.
  • the temperature of the individual treatment chambers may be gradually increased in the longitudinal direction of the device, or the composition of the gas atmosphere may be changed from the treatment chamber to the treatment chamber.
  • the device designed according to the invention may have one or more conveying paths arranged next to one another.
  • the device has two juxtaposed conveyor paths.
  • a bidirectional admission with the corresponding gas while in the adjacent chamber, the gas guide is opposite, ie on both sides away from the parts.
  • Other variants of the gas routing are possible and will be discussed later in the description. It is essential in any case that the invention provides for a mutual loading of the parts during their conveyance through the device in order to even out the treatment.
  • a radial blower is used in the device designed according to the invention as a circulation device.
  • blowers are used in particular when a single conveying path extends through the device.
  • the circulating means is an axially aspirating and radially ejecting or reversely operating fan.
  • the blower is arranged between the two conveying paths, so that both conveying paths are acted on either laterally from the outside or from the inside.
  • the fans are located at the top of the treatment chamber.
  • the preferred gas loading direction of the parts is laterally.
  • the gas-conducting devices can also be arranged so that the parts are acted upon from below.
  • the circulation device is preferably arranged on the upper side of the treatment chamber.
  • the invention does not exclude that the circulation device can also be arranged laterally on / in the treatment chamber.
  • each treatment chamber has a circulation device.
  • a single circulation device can also act on two treatment chamber parts separated from one another by a partition wall with carrier gas and / or reaction gas.
  • the circulation device acts on the parts arranged in a treatment chamber from one direction, expediently from the lateral direction from the outside.
  • the circulation device can act on the arranged in a treatment chamber parts simultaneously from two opposite directions. This is, as mentioned, in particular the case when two parallel conveying paths are arranged side by side and the circulation device is located between the two conveying paths. In this case, preferably a simultaneous admission of the parts on the two conveying paths takes place laterally from the outside.
  • each treatment chamber has introduction means for the carrier gas and / or reaction gas, so that different gases and / or gas compositions can be introduced from the treatment chamber to the treatment chamber. Preferably, this is done via lances that extend into the gas circulation chamber of each treatment chamber. In this way, the occurrence of dead zones is avoided.
  • the inventively constructed device is further provided with suitable heating devices. It is understood that each treatment chamber has its own heating devices. The design and arrangement of these heaters lies in the knowledge of the skilled person.
  • the device may preferably have a circulating belt or a sliding track or roller conveyor with bumper.
  • belt furnaces or pusher furnaces are used.
  • the parts to be treated are expediently arranged in gas-permeable charge carriers which move on the conveyor belt or the slide track or roller conveyor through the device.
  • Several batch carriers can be stacked on top of each other. Since the charge carriers are permeable to gas and have, for example, lateral perforated walls, good gas contact with the parts to be treated is ensured.
  • each treatment chamber has its own gas discharge devices.
  • an influence on the parts to be treated on their conveying path through the gases produced by the treatment is largely avoided. It is thus possible to withdraw from each treatment chamber the gas atmosphere present there, so that the subsequent region of the device, i. the subsequent treatment chamber, not with the gas atmosphere of the first treatment chamber, i. For example, the resulting exhaust gases, is charged.
  • the atmosphere of each treatment chamber is therefore unaffected by the exhaust gases or spent gases of the preceding treatment chamber. This allows the desired gas composition to be maintained in each chamber, i. in the conveying direction of the parts, the efficiency of the supplied carrier and / or reaction gas does not fall off.
  • each treatment chamber may be analyzed by appropriate means present in the chamber, and peeled off the gas atmosphere are controlled from the corresponding treatment chamber in dependence on the determined values. Since preferably also each treatment chamber is provided with its own heating devices, the temperature in each treatment chamber can be controlled accordingly, which can also be done via the amount of gas withdrawn from each treatment chamber.
  • the gas discharge devices of each treatment chamber are preferably arranged in the pressure region of the treatment chamber. As a result, a perfect gas removal is ensured without additional measures.
  • the gas discharge devices are arranged in the suction region of the treatment chamber, for which purpose an additional suction device is provided.
  • the gas removal devices of each treatment chamber have an opening and closing device, so that a gas discharge can be carried out selectively from one or more treatment chambers.
  • a gas discharge can be carried out selectively from one or more treatment chambers.
  • the withdrawn gas atmosphere is reused or further treated, for example burned.
  • the withdrawn carrier gas for example, can be cleaned accordingly and reintroduced into the device.
  • the treatment produces chemical reaction products which must be further processed, in particular burned.
  • the invention therefore provides in a preferred embodiment that each treatment chamber is assigned its own combustion chamber for the gases discharged. The discharged from the respective treatment chamber gases are therefore introduced into the corresponding treatment chamber and burned (flared).
  • the gas discharge means of the treatment chambers open into a common manifold, which leads into a common combustion chamber.
  • Yet another embodiment of the invention provides that the gas discharge devices have a switching device for discharging the gases into the own or the common combustion chamber.
  • the corresponding aftertreatment route can be selected, depending on whether the gases originating from each treatment chamber can be treated together or treated separately.
  • the device designed according to the invention may be, for example, a belt furnace, blast furnace, etc., wherein the respective type of conveying of the parts by the device is not critical.
  • a blast furnace the parts are guided for example along a slide or roller conveyor and with the aid of a bumper pushed through the device.
  • the parts to be treated themselves are arranged in appropriate charge carriers, which are permeable to gas, for example have lateral hole walls.
  • a plurality of charge carriers are arranged one above the other on their way through the device.
  • both a carrier gas (nitrogen) and a reaction gas (nitric acid) are introduced into the individual treatment chambers of the device, wherein the parts which are passed through the device along one or more parallel conveying paths are laterally charged with the introduced gases, and mutually from treatment chamber to treatment chamber or mutually within a treatment chamber.
  • gases such as formaldehyde, or existing gases (nitric acid, nitrogen) are removed via the gas removal of each treatment chamber from this and further treated accordingly (cleaned, separated, burned, etc.).
  • the device for the physical and / or chemical treatment of parts shown schematically in the plan view in FIG. 1 is a so-called pusher furnace, in which the parts to be treated are arranged on two conveying paths 3, 4, which are arranged side by side and as slideways. in the direction of the arrow by means of a suitable bumper (not shown) are moved through the oven.
  • the parts to be treated are arranged in box-shaped batch carriers, wherein a plurality of batch carriers are arranged one above the other.
  • each treatment chamber 2 has a circulation device 5 in the form of an axially sucking and radially blowing blower.
  • the circulation device 5 is arranged centrally in the upper region of each treatment chamber 2. With the aid of this circulation device 5, an introduced carrier gas and an introduced reaction gas are circulated in each chamber so that the parts to be treated are charged with the gas atmosphere formed, whereby the parts are heated and subjected to a chemical reaction.
  • the device shown here is, for example, a device for debinding moldings, wherein in the device the molded parts still provided with a binder are treated so that the binder is removed and flared. The corresponding device for flaring is not shown here.
  • Each treatment chamber 2 has introduction means for the carrier gas, for example nitrogen, and the reaction gas, for example nitric acid. Further, each treatment chamber 2 has respective gas discharge means.
  • the arrows shown in Figure 1 in each treatment chamber indicate the direction with which the parts to be treated are exposed to the gas atmosphere. In the first treatment chamber from above, the parts are acted on laterally from the outside. In the second treatment chamber shown below, the parts are acted upon from the inside to the outside. The same happens in the third and fourth treatment chamber. The parts are therefore acted upon alternately from treatment chamber to treatment chamber, so that a total uniform application to the gas atmosphere from the lateral direction is achieved.
  • FIG. 2 shows an enlarged cross section through the first treatment chamber shown in Figure 1 above.
  • this treatment chamber 2 which is provided with a corresponding insulation, located centrally at the top of the aforementioned circulation device 5.
  • the two conveying paths are shown at 3 and 4, wherein on these conveying paths (slideways) a plurality of superposed charge carriers 6 are shown contain the molded parts to be treated.
  • the charge carriers 6 have perforated sidewalls so that the gaseous atmosphere can penetrate the charge carriers.
  • suitable heaters are shown.
  • the carrier gas is introduced via a gas lance shown at 10, while the reaction gas is introduced via a gas lance shown at 11.
  • a suitable gas discharge device is shown at 12.
  • the introduced gas mixture is circulated in the direction of the arrows shown within the treatment chamber 2, with corresponding Gasleit wornen 7, 8 cause the gas from the circulation device radially outwards and then downwards and inwards through the guide means 8 (hole walls) to be led.
  • the gas flows through the charge carrier 6 with the moldings and is sucked in by the circulation means back up.
  • each treatment chamber 2 is provided with its own GaseinLab boots and gas extraction devices and has its own circulation device, can be set in each treatment chamber 2, a desired gas atmosphere, which corresponds to the required treatment.
  • Figure 3 shows a cross section through another embodiment of a device for treating parts.
  • this device which also has, for example, four treatment chambers arranged one behind the other, a single conveying path 4 extends through the device.
  • a single conveying path 4 extends through the device.
  • it is a pusher in which 6 parts accommodated in batch carriers are moved in the longitudinal direction through the device.
  • a circulating device 5 in the form of an axially aspirated and radially blowing blower approximately centrally on the Top of a treatment chamber 2 arranged.
  • Suitable gas guiding devices 7, 8 provide for a corresponding gas circulation within the treatment chamber, wherein in this embodiment only a carrier gas is introduced via a gas lance 10 into the treatment chamber. It should therefore take place only a heating of the parts to be treated, which happens with the help of suitable heaters 9.
  • the gas is discharged radially from the circulating device 5, deflected downwards and again deflected, wherein it flows through the perforated walls 8, the superposed charge carriers 6 side. It is deflected upwards on the other side of the chamber and sucked axially by the circulation device 5.
  • the treatment chamber has its own gas discharge device 12.
  • FIG. 4 shows schematically a plan view of the device shown in FIG.
  • the device 1 has four successively arranged treatment chambers 2 through which the delivery path 4 extends.
  • each treatment chamber 2 there is a circulation device 5.
  • the arrows shown in the treatment chambers indicate the direction in which the parts are exposed to the gas atmosphere. This happens mutually in this embodiment, ie the parts are in the first treatment chamber from the top from left to right, in the second treatment chamber from right to left, in the third treatment chamber again from left to right and in the fourth treatment chamber again from right to acted on the left.
  • FIG. 5 shows a schematic plan view of a further embodiment of a device for treating parts.
  • each treatment chamber 2 has its own circulation device 5.
  • the gas guiding devices are in this case arranged and formed so that they extend approximately in the diagonal direction, so that in each treatment chamber, the parts are acted upon both from right to left and from left to right, as indicated by the arrows in Figure 5.
  • this embodiment even in the respective treatment chamber itself, a mutual loading of the parts is realized.
  • FIG. 6 shows a schematic plan view of a further embodiment of a device for treating parts.
  • This device has two successively arranged treatment chambers 2, which are each divided by a gas separation wall into two chamber halves. Per treatment chamber, in turn, a circulation device 5 is provided.
  • a circulation device 5 is provided.
  • the parts are already applied mutually in each treatment chamber in this embodiment, as indicated by the arrows shown.
  • two conveying paths 3, 4 extend through the device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Tunnel Furnaces (AREA)
  • Treating Waste Gases (AREA)
EP07017379A 2006-09-05 2007-09-05 Dispositif destiné au traitement chimique et/ou physique de pièces Withdrawn EP1898170A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610041625 DE102006041625A1 (de) 2006-09-05 2006-09-05 Vorrichtung zur physikalischen und/oder chemischen Behandlung von Teilen
DE200610041626 DE102006041626A1 (de) 2006-09-05 2006-09-05 Vorrichtung zur physikalischen und/oder chemischen Behandlung von Teilen

Publications (2)

Publication Number Publication Date
EP1898170A2 true EP1898170A2 (fr) 2008-03-12
EP1898170A3 EP1898170A3 (fr) 2008-08-27

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EP07017379A Withdrawn EP1898170A3 (fr) 2006-09-05 2007-09-05 Dispositif destiné au traitement chimique et/ou physique de pièces

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008063538A2 (fr) * 2006-11-21 2008-05-29 Corning Incorporated Procédé et appareil d'enlèvement thermique d'un liant d'un corps vert cellulaire thermique
US9556072B2 (en) 2009-06-25 2017-01-31 Basf Se Process for the continuous thermal removal of binder from a metallic and/or ceramic shaped body produced by injection molding, extrusion or pressing using a thermoplastic molding composition
EP3401628A1 (fr) * 2017-05-12 2018-11-14 Primetals Technologies Austria GmbH Transport d'un produit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0789210A1 (fr) 1995-10-23 1997-08-13 Peter Helmut Dipl.-Ing. Ebner Installation de refroidissement d'un produit recuit à deplacement continu
US20010051323A1 (en) 2000-05-30 2001-12-13 Oak Nippon Co. Ltd. Convection-type brazing method and its apparatus for metal workpieces
US6345757B1 (en) 1997-07-31 2002-02-12 Fujitsu Limited Reflow soldering method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2551811A1 (de) * 1975-11-15 1977-05-26 Rudolf Riedel Verfahren und vorrichtung zur waermebehandlung von waren
DE19922203A1 (de) * 1999-05-14 2000-11-16 Andreas Haesler Verfahren zum Trocknen und Brennen von keramischen Formlingen ohne Trägerwechsel in einem oder mehreren Behandlungskanälen
US8328551B2 (en) * 2002-09-26 2012-12-11 Btu International, Inc. Convection furnace thermal profile enhancement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0789210A1 (fr) 1995-10-23 1997-08-13 Peter Helmut Dipl.-Ing. Ebner Installation de refroidissement d'un produit recuit à deplacement continu
US6345757B1 (en) 1997-07-31 2002-02-12 Fujitsu Limited Reflow soldering method
US20010051323A1 (en) 2000-05-30 2001-12-13 Oak Nippon Co. Ltd. Convection-type brazing method and its apparatus for metal workpieces

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008063538A2 (fr) * 2006-11-21 2008-05-29 Corning Incorporated Procédé et appareil d'enlèvement thermique d'un liant d'un corps vert cellulaire thermique
WO2008063538A3 (fr) * 2006-11-21 2008-08-07 Corning Inc Procédé et appareil d'enlèvement thermique d'un liant d'un corps vert cellulaire thermique
US9556072B2 (en) 2009-06-25 2017-01-31 Basf Se Process for the continuous thermal removal of binder from a metallic and/or ceramic shaped body produced by injection molding, extrusion or pressing using a thermoplastic molding composition
EP3401628A1 (fr) * 2017-05-12 2018-11-14 Primetals Technologies Austria GmbH Transport d'un produit
WO2018206383A1 (fr) * 2017-05-12 2018-11-15 Primetals Technologies Austria GmbH Transport d'un produit à transporter
RU2764669C2 (ru) * 2017-05-12 2022-01-19 Прайметалз Текнолоджиз Аустриа ГмбХ Транспортировка транспортируемого материала
TWI759478B (zh) * 2017-05-12 2022-04-01 奧地利商奧地利冶金技術股份有限公司 輸送設備及操作輸送設備的方法
US11650013B2 (en) 2017-05-12 2023-05-16 Primetals Technologies Austria GmbH Conveying a material to be conveyed

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Publication number Publication date
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