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Cleanliness of stamped parts

Discussion in 'Manufacturing and Related Processes' started by tiberiu cristian, Jan 8, 2016.

  1. tiberiu cristian

    tiberiu cristian New Member

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    Hello,

    Cleanliness required on stamped parts with analyse interpretation according ISO 16232.

    we do washing for degreasing (with percloretilene) but we still fail to cleanliness analyse.

    Question: what kind of operation is best suitable for cleanliness of stamped parts?
     
  2. Golfman25

    Golfman25 Well-Known Member

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    Are you asking how to clean the parts or test the parts for cleanliness.
     
  3. tiberiu cristian

    tiberiu cristian New Member

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    Cleaning process...not test
     
  4. Emmyd

    Emmyd Member

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    In our stamping facility, we use washers with built in water heaters and use a soap/defoamer combination to wash the oil off the parts. We use several washers that can be moved from press to press, and a stationary washer that also has an air blade drying system. Some of our parts require a cleanliness check using dynes ink. Our washers do a good job (with proper maintenance and cleanout), but there are some parts that require hand wipe down after washing.
     
  5. Miner

    Miner Moderator Staff Member

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    Do you have to pass a cleanliness test to meet a customer requirement, or do you need to clean in preparation for further processing such as painting or plating?
     
  6. Golfman25

    Golfman25 Well-Known Member

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    First you need to break down the oils you use. A lot will depend on the oil. Work with your oil supplier to see what works best. We have a service who supplies a solvent and special tanks. After the parts are dipped, they are then washed - soap/water in a tumbler or vibratory. Then dried. We use some heavy oils and it works well. Good luck.
     
  7. tiberiu cristian

    tiberiu cristian New Member

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    Thank you all for replies...

    My process includes washing of the parts, but the machine only degrease the parts, this point is ok.

    But my part fails on cleanliness on metal particles due to shape of pins (the part is a shield case with 5 pins).

    Our washing machine does degreasing in ultrasonic baths but doesn't remove particles from pins.
    I have read an article about megasonic baths. But in Europe I didn't find any service supplier for this kind of whasing.

    Thanks
     
  8. jacklinjot

    jacklinjot Member

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    Mass and size can be very important for the selection of cleaning methods.
     

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