FI62864C - VENTILATIONSANLAEGGNING FOER EN YTBEHANDLINGSANLAEGGNING - Google Patents

Description

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Sweden-Sweden (SE) 780t821-2 (71) Kemiska AB Candor, 601 01 Norrköping 1, Sweden-Sweden (SE) (72) Kaj Lennart Steen, Norrköping, Hikan Bertil Alexandersson, Norrköping,

Sweden-Sweden (SE) (7h) Oy Borenius ί Co Ab (5h) Ventilation device for surface treatment device - Ventilationsanläggning för en ytbehandlingsanläggning

The invention relates to a ventilation device for a surface treatment device having a plurality of baths containing treatment solutions arranged in at least one row, into which the substance to be treated is immersed, whereby a transport trolley movable above the tubs can transport the substance to be treated from one tub to another.

In various types of surface treatments, such as degreasing, mirroring, phosphating, anodizing, electrolytic metal coatings of all kinds, passivation, etc., in which the substance to be treated is immersed in an open treatment solution bath, to the outdoor environment.

For this reason, it has been determined that effective ventilation must be provided when using surface treatments of the type described above. Achieving efficient suction from the surface of an open treatment tub requires large volumes of air and air velocity. The air sucked in this way must usually be cleaned of hazardous ingredients by washing it in a pre-cleaner, etc., and the heated clean air must be returned in the same amount as the air sucked out. The acquisition and operating costs for such suction, air washing and clean air supply and heating 2 62864 are considerable and are directly proportional to the amount of air sucked.

In the application of the present invention, which has the features of the appended claims, it can be achieved that the amount of air that must be sucked out to provide adequate ventilation can be significantly reduced, e.g. 70-90% relative to the amount of air that must be sucked out completely from the opening. käsittelyammeesta.

The invention will now be described with reference to the accompanying drawing, in which Figure 1 is a perspective diagram of an embodiment of the invention and Figure 2 is a schematic section. Figure 3 shows a section in the longitudinal direction of the treatment tub.

The three tubs, 1, 2, and 3 shown in Figures 1 and 2 are assumed to form part of a programmed surface treatment machine with a plurality of surface treatment baths arranged in a row. Above each such tub there are two lid halves 4 and 5 which are pivotally mounted on the upper edge of the tub and which in the lowered position can communicate with a lifting device 6 supporting the substance 7 to be treated in the treatment tank. . The cover halves 4 and 5 can be guided by the pneumatic cylinders 4a and 5a shown in broken lines in Fig. 2.

At the top of each tub, preferably on the same edge on which the lid half is mounted, there is a suction channel 8, which is best connected to the inside of the treatment tub through the elongate openings 9. The suction ducts 8 are connected via suction pipes 10, of which one pipe is shown in Figure 1, to a drainage system known per se. This structure of the tub and its suction tubes provides efficient suction of vapors and gases from the treatment bath as long as the substance to be treated is in the treatment bath.

However, the strongest formation of vapors and gases in the surface treatment occurs when the treated substance is lifted from the bath during transport to another treatment bath. In order to reduce this amount of air required to dissipate the vapors and gases thus escaping, the device for conveying the substance to be treated is constructed as follows.

3,62864 Along the row of treatment tubs, two treadmills 11 are installed, which support the transport carriage 12, which rests on the treadmills 11 by means of wheels, which are not shown in the drawing. As mentioned in connection with Fig. 2, the lifting device 6 and the material to be treated attached thereto can be lifted onto the treatment bath, for example by the lifting device shown in Fig. 3. When the substance to be treated 7 is lifted from the treatment tank, it is surrounded by a cover 13. This is best provided with a lower suction pipe 14 connected by a slide switch 15 to a drain channel 16 connected to a drain system not known per se. The discharge channel 16 has an opening 17 extending longitudinally along its upper side, which is normally closed by a closing element 18, the structure of which can be opened by a slide switch 15 when it is moved along the discharge channel 16 and then closed again.

As mentioned in connection with Figure 2, the lower edge of the cover 13 may be at a certain distance above the tub in those parts which correspond to the long sides of the tub. The openings which then arise when the treatment trolley is above the treatment bath can be closed by turning up both treatment halves 4 and 5 of the treatment bath. In this way a virtually complete enclosure of the substance to be treated is achieved when it is above the treatment bath. Thus, since the cover is in communication with the discharge channel 16 even when the substance to be treated is transferred to the second treatment tank, those vapors and gases which then evaporate from the substance to be treated are also sucked out of the cover. To facilitate this suction, and since the vapors and gases normally rise upwards, the cover can be provided from the inside with a channel 19 which communicates with the interior of the cover 13 through the openings 20.

Figure 3 shows the substance to be treated in the raised position 7 'and in dashed lines 7 "in the position immersed in the treatment tank. The box 21 placed on the cover 13 contains a shaft 22 driven by a motor 23. Two lifting belts 24 and 25 are connected to the shaft 22 at the lower end. can be attached with a hook to the lifting device 6 when the substance to be treated 7 has to be lifted from or lowered from the treatment tank.

Claims (5)

4,62864 A ventilation device for a surface treatment device comprising a plurality of baths (1, 2, 3) containing treatment solutions arranged in at least one row, into which the article (7) to be treated is placed in a transport carriage (12) above the bath, the transport carriage being surrounded downwards by an open a cover (13) provided with a suction pipe (14) connected to the drain channel (16) by a slide switch (15), characterized in that a two-part cover (4, 5) is pivotally mounted at the top of each bath, which in the lowered position engages the lifting device ( 6), which supports the article to be treated (7 * *) », in addition to which the lid (4, 5) in the upturned position is connected to the cover (13) for enclosing the article to be treated (7 ') raised above the bath. Ventilation device according to Claim 1, characterized in that each bath below the lid (4, 5) is preferably provided with suction ducts (8) running along the upper edge and connected to the drainage system. Ventilation device according to Claim 2, characterized in that the suction ducts (8) have elongate openings (9) facing the corresponding bath. 1. Ventilation arrangements for the operation of the control unit, which means that the flame retardant and the reference material (1, 2, 3) are connected to the control unit, and the drive unit (7) is connected to the transport unit (12). colors of the transport vehicle with the help of the pawl (13), with the aid of a guide (14), with the use of gliding (15) with the use of an evacuation channel (16),