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D 100 Cleaning of small turned items before vacuum hardening or nickel plating ( Date: 2004-05-11 )
Turned items made of steel, Stainless steel, brass, chromium or alu are cleaned in bulk from cuting oils and chips using a modified alcohol in a vacuum degreasing plant; thereafter vacuum hardening or nickel plating
 


  Material  |  Dirt  |  Equipment  |  Agents  |  Process  |  Costs  |  Evaluate  |  Comparison  

Material:

Turned items (eg tiny shafts for electr. tooth brushes diameter 3 mm, small srews, also parts with drilled holes), in bulk, charged in stainless steel baskets containing up to 10 kg
METAL / NON METAL : steel, stainless steel, brass, aluminium, chromium
Shape : smooth surfaces, small holes with metal chips inside, a complicated geometry, a simple geometry
Utilisation of equipment (throughput,workload) in % : 40
Maximum possible throughput of parts per year : 16.000.000
Max. area which can be cleaned per year : No statement

Dirt:

mineral oil, Metallic particles
Previous process :

Equipment:

Vakuum-Entfettungsautomat V 1
One chamber alcohol vacuum steam degreaser with vacuum drying and additional appliance for continuous removal of oil sludge

Process:

Cleaning facilities with a vapour degreasing system

1. step: Precleaning with glycol ether / alcohol, use of ultrasonic and rotation or rocking, 2. step: cleaning as in step 1, 3. step: vapour degreasing as in step 1 but without ultrasonics, 4. step: vacuum drying

Duration of cleaning process for one part (min.) : No statement
Duration of cleaning process for the charge (min.) : 10.00
Recycling : Step:1 Oil sludge from the distillation is disposed of via used oil, chips and filter is put to metal recycling, cleaner is used almost infinitely and evaporates very slowly (condensation system recovers most but lets 250-300 ltrs./a slip away) and is far below the limit set by VOC directive.
Step:2 Oil sludge from the distillation is disposed of via used oil, chips and filter is put to metal recycling, cleaner is used almost infinitely and evaporates very slowly (condensation system recovers most but lets 250-300 ltrs./a slip away) and is far below the limit set by VOC directive.
Step:3 Oil sludge from the distillation is disposed of via used oil, chips and filter is put to metal recycling, cleaner is used almost infinitely and evaporates very slowly (condensation system recovers most but lets 250-300 ltrs./a slip away) and is far below the limit set by VOC directive.
Step:4 No statement

Quality:

free of chips and loose dirt, free of oil and grease, dry

Subsequent process:

electroplating, heat treatment, assembling/fitting

Costs:

Total sum : 84.627,00 EURO / Year


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