Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1996-04-01
1998-04-07
Valentine, Donald R.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204225, 204275, 204297R, 118428, 118429, C25D 1702, B05C 300
Patent
active
057360146
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention starts out from a device with characteristics given in the preamble of claim 1. Such a device is known for the nickel-plating of cylinder running surfaces of internal combustion engines. For this purpose the internal combustion engines are placed on a treatment table with cylinder openings facing down, whereby a hollow electrode projects from the treatment table into each cylinder. With the cylinders closed off by the treatment table, a treatment liquid, that is to say a nickel electrolyte, is piped from below into the cylinders, that is to say into the annulus between electrode and cylinder wall, rises up in the annulus and leaves by way of the hollow electrode (DE-PS 37 42 602).
Shape and composition of the treatment tables and the mounted, upward projecting electrodes depend on the structural shape of the engine to be treated. If cylinder running surfaces of different types of engines are to be treated in the installation, treatment tables and electrodes need to be exchanged. For this purpose a mechanic must climb into the tub and carry out the work necessary for the exchange under very cramped conditions, and replacement parts must be lifted in and out of the tub which is also very tiresome, since replacement pans are heavy and unwieldy, and built-in structures get in the way. Retooling the device for a different type of engine is therefore time consuming and necessitates a shut-down for a lengthy period of time. The shut-down of the device results in a shut-down of the total installation, consisting of preparatory treatment stations, coating stations and aftertreatment stations, since the device, according to the invention, is an integral part of the installation.
The object of the invention on hand is to show how the retooling can be facilitated and how the installation down-time can be minimized.
The object is solved by a device with characteristics given in claim 1. Advantageous further developments of the invention are the subject of the dependent claims.
By the fact that the treatment tables are mounted on a pull-out module which can be extracted from the side of the tub, it is no longer necessary that a mechanic climbs into the tub when retooling the device for another type of engine. Rather, the treatment tables required for another type of engine can be assembled outside the tub, for example in a work shop, on a separate pull-out module and readied for installation, so that the remaining work to be done at the tub simply consists of extracting the pull-out module from the tub, setting it aside, inserting the prepared pull-out module into the tub and again closing the lateral access to the tub.
In this manner the time period during which the device has to be shut down for retooling is exceedingly short, and can even be virtually nil under the most favorable circumstances, because the work to be carried out at the tub can be reduced to a minimum and is independent of the pull-out module, and therefore an interruption of the production is not required. All other assembly and maintenance work associated with retooling can be carried out outside the tub without time pressure and therefore with greater care, whereby there is the additional advantage that assembly and maintenance work is not hampered by cramped work space and by an environment which is contaminated by disagreeable chemicals. The invention proves its worth not only when retooling the device to suit another type of engine, but also in case treatment tables, electrodes or other associated parts in the tub become damaged and a repair becomes necessary, and therefore the device has to be taken out of service. In this case a spare pull-out module of equal type can be kept ready, so that the exchange can be done in a flash, the damage on the replaced pull-out module can be diagnosed and repaired without time pressure and the repaired pull-out module can be kept as a spare.
Extracting the pull-out module laterally has the additional advantage that a special hoist above the tub is not needed; rather, the pull-out mo
REFERENCES:
patent: 3746632 (1973-07-01), Kuhdorf et al.
patent: 4093530 (1978-06-01), Isaakovich et al.
patent: 5224994 (1993-07-01), Daly
patent: 5552026 (1996-09-01), Ikegaya et al.
Drese Hermann A.
Emde Werner
Knorr Klaus
Stohrer-Doduco GmbH & Co.
Valentine Donald R.
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