EP0211239B1 - Dispositif pour le traitement d'objets en vrac - Google Patents

Dispositif pour le traitement d'objets en vrac Download PDF

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Publication number
EP0211239B1
EP0211239B1 EP86109067A EP86109067A EP0211239B1 EP 0211239 B1 EP0211239 B1 EP 0211239B1 EP 86109067 A EP86109067 A EP 86109067A EP 86109067 A EP86109067 A EP 86109067A EP 0211239 B1 EP0211239 B1 EP 0211239B1
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EP
European Patent Office
Prior art keywords
treatment
treatment apparatus
conveyor
bath
goods
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
Application number
EP86109067A
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German (de)
English (en)
Other versions
EP0211239A1 (fr
Inventor
Siegfried Dr. Birkle
Johann Gehring
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.)
Siemens AG
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT86109067T priority Critical patent/ATE57543T1/de
Publication of EP0211239A1 publication Critical patent/EP0211239A1/fr
Application granted granted Critical
Publication of EP0211239B1 publication Critical patent/EP0211239B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material

Definitions

  • the invention relates to a treatment device for pourable material, with a treatment bath accommodated in a trough, through which the pourable material can be transported with the aid of at least one vibratory conveyor with a conveyor track leading upwards.
  • a similarly constructed device for the electrolytic surface treatment of pourable goods is the subject of European patent application No. 86109 138.7, which has the same age rank, in accordance with EP-A-0209016.
  • a treatment device of the type mentioned at the outset is known from US Pat. No. 3,216,431, in which the use of an oscillating conveyor enables the pourable material to be conveyed automatically with simultaneous vibration of the material.
  • the helical conveyor track of the vibratory conveyor which is attached to a central support column and suspended from above in the treatment bath, can only be realized with a limited length for constructional reasons and for reasons of strength. For this reason, the dwell times of the pourable goods in the treatment bath are too short in many applications.
  • a treatment device for pourable goods with a treatment bath accommodated in a tub through which the pourable goods can be transported with the aid of at least one vibratory conveyor with three parallel conveying tracks which lead upwards in a spiral shape.
  • At the end of the first conveyor track there is a downpipe which then transports the pourable material into the start area of the second conveyor track.
  • there is also a further downpipe at the end of the second conveyor track which then transports the pourable material into the start area of the third conveyor track.
  • the total length of the conveyor track is increased to three times the same height.
  • a galvanizing device for pourable material in which the galvanic metal deposition is carried out on a helical ramp arranged in the treatment bath, which is set in vibration with the aid of a vibrator.
  • the upper aisles of the ramp serve as a pure spiral conveyor, which transports the material upwards for better mixing, so that it can fall back onto the ramp. Since the space on the helical ramp is narrowly limited, there is only a low throughput. In addition, the removal of the fully galvanized parts from the ramp involves considerable effort.
  • air treatment devices for pourable material which are used for the galvanic deposition of aluminum from aprotic, oxygen and water-free, organoaluminum electrolytes.
  • Such galvanic aluminum deposits are characterized by their ductility, low pore density, corrosion resistance and anodizing ability. Since the entry of air through reaction with atmospheric oxygen and air humidity would bring about a considerable reduction in the conductivity and the service life of these electrolytes, the electroplating must be carried out in treatment facilities in which the tub receiving the electrolyte is sealed gas-tight and the space above the electrolyte level with an inert gas is applied.
  • import and export locks are also required, which are designed as gas locks, as liquid locks or as combined gas-liquid locks and with means of conveyance for passing through the electroplated material are equipped.
  • the invention has for its object to improve a treatment device of the type mentioned so that the residence times can be adapted to the respective requirements at a sufficiently high throughput and thereby a simple removal of the finished galvanized material from the treatment bath is guaranteed.
  • a device for returning the treated goods to the initial region of the vibratory conveyor, which device optionally guides the treated goods back into the treatment bath and out of the treatment device.
  • the product With the recirculation device connected, the product can be subjected to the respective treatment in circulation mode until the desired result has been achieved with very good mixing.
  • the return device is then uncoupled so that the finished material can be discharged in the normal way.
  • the changeover between circulation and discharge is particularly easy to accomplish if the return device has a switch. If the return device is designed with a gravity conveyor, then additional funds for the return can be dispensed with.
  • the gravity conveyor is then preferably formed by a downpipe. In the case of treatment devices operating in the absence of air, a downpipe of this type can be connected particularly easily to an entry lock of a subsequent device and, if appropriate, can be used as a downward leg of a U-shaped liquid lock.
  • the conveyor track of the vibratory conveyor is provided with a perforation at least in some areas.
  • a perforation further increases the exchange of the treatment liquid and the uniformity of the surface treatment.
  • the conveyor track of the vibratory conveyor is led beyond the level of the treatment bath. Above the bath level, the liquid drops still adhering to the material are then thrown away by the vibrations, so that there is extremely little carryover of the bath liquid.
  • a spray device for spraying a liquid compatible with the treatment bath can then also be arranged at least in the end region of the conveyor path of the vibratory conveyor. With the help of this spray device, the treated material can then be freed from adhering residues of the bath liquid and cleaned. Since these residues of the bath liquids run back into the treatment bath, the removal of the bath liquid is further reduced or avoided entirely.
  • a treatment device can be operated with relatively little additional effort in the absence of air and can be used, for example, for the treatment of the goods in aprotic, oxygen- and water-free treatment baths.
  • the tub can be closed gas-tight, while the space above the treatment bath can be charged with an inert gas.
  • the use of a vibratory conveyor has the additional advantage that no drive shafts leading out of the tub and the treatment bath have to be sealed.
  • the parts treated in the absence of air can be transferred directly or via a lock to a subsequent treatment facility, such as e.g. an air-operated aluminizing device, i.e. they do not come into contact with air and reactions such as oxidations, corrosion and the like are avoided.
  • a condensation device is arranged in the space above the level of the treatment bath, the condensate formed in the condensation device being able to be fed to the spray device.
  • a solvent contained in the treatment bath is therefore used to clean the treated goods, the closed circulation of this solvent allowing a constant solvent concentration in the treatment bath.
  • the supply of the pourable material to the vibratory conveyor is particularly easy to implement if the vibratory conveyor - as seen in the conveying direction - is connected upstream in the gravity conveyor.
  • the same advantages also result in the discharge if a gravity conveyor is arranged downstream of the vibratory conveyor - seen in the direction of conveyance.
  • the gravity conveyor is formed by a downpipe.
  • downpipes of this type can also be connected particularly easily to corresponding import or export locks.
  • the downpipe can then already be used as a downward leg of a U-shaped liquid lock.
  • vibratory conveyors can also be used, which ensure gentle handling of the goods and do not pose any problems with regard to the sealing of the lock chambers.
  • Treatment devices designed according to the invention are particularly suitable for activating, pickling, degreasing, rinsing or cleaning pourable material in electroplating technology.
  • the drawing shows a highly simplified schematic representation of a longitudinal section through a tower-shaped treatment device, in which pourable material G, which is, for example, bolts, nuts, screws, spacer bushings and the like, is treated with the exclusion of air in a treatment bath Bb.
  • This treatment bath Bb is located in a circular cylindrical tub W, which can be closed gas-tight with the aid of an upper lid D and is arranged on a frame Ge.
  • the area of the tub W located above the level Sp of the treatment bath Bb is subjected to an inert gas, such as nitrogen the supply of this inert gas is indicated by an arrow Ig.
  • the treatment bath Bb can be continuously circulated during operation with the help of a circulation pump Up and, if necessary, also outside the tub W to the required operating temperature, such a circulation of the bath liquid is indicated by arrows Bf.
  • the material G to be treated is introduced from above into the lower region of the tub W via an inlet lock and a downpipe Fr1, the downpipe Fr1 being filled with the treatment bath Bb up to the level of the mirror Sp and then with inert gas Ig is acted upon.
  • the material G introduced via the downpipe Fr1 then falls on the lower end of the conveyor track Fb of an oscillating conveyor arranged inside the tub W and designated overall by Sf.
  • the material G On the conveyor track Fb, which is designed as a vibrating trough and spirally upwards, the material G is transported upward above the mirror Sp of the treatment bath Bb and then falls into the funnel-shaped upper end of a downpipe Fr2 leading out of the tub W, which is in the manner of a Down pipe branches into a downpipe Fr20 and a downpipe Fr21. In the position shown in the drawing of a switch We arranged at the branching point, the material G is then returned via the downpipe Fr20 re-entering the tub W to the lowest aisle of the helical conveyor track Fb. If the switch We, which is designed as a pivotable flap, is adjusted in the direction of the arrow Pf, the finished goods G are passed directly via the downpipe Fr21 or via a lock into a treatment device arranged downstream.
  • the conveyor track Fb leading upwards in a spiral shape in the tub W is provided with a perforation P indicated only at one point in the drawing and fastened to a centrally arranged support column Ts.
  • the lower end of the support column Ts is fastened on a vibrator V arranged centrally within the frame Ge.
  • the passage of the support column Ts through the bottom of the tub W is sealed by an elastic bellows B, which is connected on the one hand to a disc placed on the support column Ts and on the other hand to the bottom of the tub W.
  • the conveyor track Fb is excited by the vibrator V via the support column Ts to vibrate with an approximately helical movement.
  • the support column Ts is fixedly connected via a flange Fla to a supporting body Tk of the vibrator V which widens conically towards the bottom.
  • the supporting body Tk is mounted on the foundation so that it can vibrate via several springs Fd.
  • An unbalance drive is arranged within the supporting body Tk, the motor M of which drives flywheels Ss arranged on both sides with adjustable eccentricity e.
  • the drive axis Aa of the motor M is inclined at an angle of, for example, 45 ° to the horizontal, so that the unbalance of the flywheels Ss generates the aforementioned vibrations with an approximately helical movement.
  • the pourable material G is transported via the conveyor track Fb through the treatment bath Bb and is subjected to a surface treatment depending on the type of treatment bath.
  • the vibrations of the conveyor track Fb and the good G favor an all-round and uniform treatment of the good G and in particular its mixing and the exchange of the bath liquid.
  • the treatment device is operated in the position of the switch We shown in the drawing until the desired success of the treatment has been achieved. Thereafter, the goods G which are led past the mirror Sp of the treatment bath Bb are freed from the residues of the bath liquid still adhering to them by means of a spray device Se arranged in the tub W and discharged via the switch We which has been switched in the direction of the arrow Pf and the downpipe Fr21 or a downstream one Treatment facility supplied.
  • the spraying device Se sprays a solvent contained in the treatment bath Bb, which is obtained from the vapors rising from the heated treatment bath Bb as condensate Ko.
  • a condensation device Ke arranged above the mirror Sp of the treatment bath Bb and consisting of a helically wound cooling tube is used, the condensate Ko formed on this condensation device Ke being collected in a gutter Sr arranged underneath and fed to the spraying device Se via a circulation pump (not shown in the drawing) becomes.
  • the treatment device shown in the drawing is used for activating the pourable material G, the activator bath used as treatment bath Bb consisting, for example, of a suitable non-aqueous acid, such as hydrogen fluoride and an organic solvent, such as alcohol.
  • a suitable non-aqueous acid such as hydrogen fluoride
  • an organic solvent such as alcohol.
  • the treatment device is operated in circulation until cast or rolled skins, oxide layers, rust or scale have been removed and a metallically clean surface has been created.
  • the material G is then cleaned with the spray device Se and fed to a downstream treatment device via the downpipe Fr21.
  • the treated material G does not come into contact with air, the clean metallic surface is no longer affected by oxidation, Corrosion and the like deteriorated again, but maintained until the end of the entire treatment, for example until the galvanic deposition of an aluminum coating. As a result, the adhesive strength and quality of subsequently applied coatings are considerably improved.
  • the treatment device shown in the drawing is used for degreasing the pourable material G, the degreasing bath used as treatment bath Bb by an organic solvent such as e.g. Carbon tetrachloride or trichlorethylene or is formed by a hot degreasing solution. Because the degreasing is carried out in a single pass or in the absence of air, the emission of harmful vapors rising from the degreasing bath to the environment is avoided.
  • an organic solvent such as e.g. Carbon tetrachloride or trichlorethylene
  • the treatment device shown in the drawing is arranged after a device for the galvanic deposition of aluminum from aprotic, oxygen and water-free, organoaluminum electrolytes.
  • the inlet-side downpipe Fr1 is connected to the discharge side of the aluminizing device in such a way that the tub W fills with the organoaluminum electrolyte as a treatment bath Bb according to the principle of the communicating tubes.
  • the aprotic solvent evaporating from the heated electrolyte which is, for example, toluene, is condensed on the cooling device Ke and supplied to the spray device Se.
  • the cleaning carried out with the aid of the spray device Se prevents the electrolyte from being carried away with the product G.
  • the downpipe Fr20 serving as a return device can be omitted.
  • the downpipe Fr21 is followed by an export lock which is preferably designed as a liquid lock.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Drying Of Solid Materials (AREA)
  • Soil Working Implements (AREA)

Claims (13)

1. Dispositif de traitement pour des objets en vrac, comportant un bain de traitement disposé dans une cuve et à l'intérieur duquel les objets en vrac peuvent être transportés à l'aide d'au moins un convoyeur à secousses possédant une voie hélicoïdale montante d'entraînement, et dans lequel au choix un dispositif (Fr2, Fr20, We) servant à renvoyer les objets traités (G) dans la zone de départ du convoyeur à secousses (Sf), renvoie les objets traités (G) dans le bain de traitement (Bb) et les fait sortir du dispositif de traitement.
2. Dispositif de traitement suivant la revendication 1, caractérisé par le fait que le dispositif de renvoi (Fr2, Fr20, We) comporte un aiguillage (We).
3. Dispositif de traitement suivant la revendication 1 ou 2, caractérisé par le fait que le dispositif de renvoi (Fr2, Fr20, We) est agencé en étant combiné à un convoyeur fonctionnant par gravité.
4. Dispositif de traitement suivant la revendication 1, caractérisé par le fait que le convoyeur fonctionnant par gravité est formé par des tubes de chute (Fr2, Fr20).
5. Dispositif de traitement suivant l'une des revendications précédentes, caractérisé par le fait que la voie de déplacement (Fb) du convoyeur à secousses comporte, au moins par zones, une perforation (P).
6. Dispositif de traitement suivant l'une des revendications précédentes, caractérisé par le fait que la voie de déplacement (Fb) du convoyeur à secousses (Sf) sort au-dessus de la surface (Sb) du bain de traitement (Bb).
7. Dispositif de traitement suivant la revendication 6, caractérisé par le fait qu'au moins dans la zone d'extrémité de la voie de déplacement (Fb) du convoyeur à secousses (Fs) se trouve un dispositif de pulvérisation (Se), servant à pulvériser un liquide compatible avec le bain de traitement (Bb).
8. Dispositif de traitement suivant l'une des revendications précédentes, caractérisé par le fait que la cuve (W) peut être fermée d'une manière étanche aux gaz et que l'espace situé au-dessus de la surface (Sb) du bain de traitement (Bb) peut être chargé par un gaz inerte (lg).
9. Dispositif de traitement suivant les revendications 7 et 8, caractérisé par le fait qu'un dispositif de condensation (Ke) est disposé dans l'espace situé au-dessus de la surface (Sp) du bain de traitement (Bb) et que le condensat (Ke), formé dans le dispositif de condensation (Ke), peut être envoyé au dispositif de pulvérisation (Se).
10. Dispositif de traitement suivant l'une des revendications précédentes, caractérisé par le fait qu'un convoyeur fonctionnant par gravité est monté en amont du convoyeur à secousses (Sf) - lorsqu'on regarde dans la direction de déplacement.
11. Dispositif de traitement suivant l'une des revendications précédentes, caractérisé par le fait qu'un convoyeur fonctionnant par gravité est disposé en aval du convoyeur à secousses (Sf) - lorsqu'on regarde dans la direction de déplacement.
12. Dispositif de traitement suivant la revendication 10 ou 11, caractérisé par le fait que le convoyeur fonctionnant par gravité est formé par un tube de chute (Fr1, Fr2, Fr21
13. Utilisation d'un dispositif de traitement suivant l'une des revendications 1 à 12 pour activer, décaper, dégraisser, laver ou nettoyer des objets en vrac, dans la technique galvanoplastique.
EP86109067A 1985-07-09 1986-07-03 Dispositif pour le traitement d'objets en vrac Expired - Lifetime EP0211239B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86109067T ATE57543T1 (de) 1985-07-09 1986-07-03 Behandlungseinrichtung fuer schuettfaehiges gut.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3524497 1985-07-09
DE3524497 1985-07-09

Publications (2)

Publication Number Publication Date
EP0211239A1 EP0211239A1 (fr) 1987-02-25
EP0211239B1 true EP0211239B1 (fr) 1990-10-17

Family

ID=6275325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109067A Expired - Lifetime EP0211239B1 (fr) 1985-07-09 1986-07-03 Dispositif pour le traitement d'objets en vrac

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EP (1) EP0211239B1 (fr)
AT (1) ATE57543T1 (fr)
DE (1) DE3674962D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701248A (en) * 1985-07-09 1987-10-20 Siemens Aktiengesellschaft Apparatus for electrolytic surface treatment of bulk goods
DE102011011532B3 (de) * 2011-02-17 2012-08-09 ProASSORT GmbH Verfahren zum Ablösen von Beschichtungen von Stahlschrotten
DE102017008530A1 (de) * 2017-09-12 2019-03-14 Wieland-Werke Ag Behandlungsvorrichtung und Verfahren zum Ablösen von Beschichtungen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662851A (en) * 1951-10-15 1953-12-15 Harry H Jones Degreasing apparatus
FR1201213A (fr) * 1957-08-30 1959-12-29 Installation de traitement de surface
CH594072A5 (en) * 1975-05-09 1977-12-30 Beaud Jean Louis Electroplating tank contg. vibrating perforated work basket - which contains helical ramp for continuous circulation of workpieces

Also Published As

Publication number Publication date
EP0211239A1 (fr) 1987-02-25
DE3674962D1 (de) 1990-11-22
ATE57543T1 (de) 1990-11-15

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