Ultrasonic Cleaner Method

 The below procedure is a general guideline to help the customer process their printed VisJet® M2 Cast part in a Ultrasonic Cleaner. Your results may vary slightly from the below procedure. Before proceeding with the procedure, confirm you have the following items in place. Also, make sure to perform this procedure in a well ventilated room or under a ventilation hood. 

 

Items Needed:

  • Small ultasonic cleaner
  • Silicone net or a 3D printed Acrylate basket
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Note: A scalable .stl basket file can be found here: Acrylate Rectangular Basket.STL. This .stl file can be sized to fit your ultrasonic cleaner using the Client Manager. This .stl file is recommended to be printed on a Acrylate printer only. Do not print this .stl file using VisiJet® M2 Cast material.

  • (1) Borosilicate glass (Pyrex) container with lid/cover.
  • 99%> Isopropryl Alcohol (IPA)
  • Safety goggles
  • Respirator mask
  • Nitrile gloves
  1. Confirm that there is a clean build plate that has been placed in the freezer for a minimum of 15 minutes prior to step 2.
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NOTE: For small delicate parts, it is recommended to use the cold plate method to remove build parts off the build plate.

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CAUTION: WAX PARTS ARE VERY DELICATE AND MAY CRACK IF LEFT IN THE FREEZER FOR AN EXTENDED PERIOD OF TIME. 

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  1. Place the build platform on top of the cold blank build plate as shown. Keep freezer door open.

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  1. Within a couple of minutes, you will hear crackling sounds. This is the sound of a parts separating from the build plate. Carefully touch each part to confirm the build part has separated from the build plate. Larger pieces will take a bit longer than smaller ones. Remove build plate from freezer when all parts have separated from build plate.

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  1. Put on safety goggles, an air respirator and a pair of Nitrile gloves for the remainder of this procedure.
  2. Fill the ultrasonic cleaner with 99%> Isopropyl Alcohol(IPA) to the maximum fill limit for your cleaner. Cover with lid and set temperature to 30° Celsius. 

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  1. Carefully place desired part(s) into a non-metal basket. Metal baskets will retain more heat and have the potential to melt or deform delicate parts.  A silicone net or a 3D printed Acrylate basket is preferred.
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NOTE: Confirm part(s) have reached room temperature from freezer before placing in basket. Frozen/cold part(s) that are processed will crack due to thermal shock.

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  1. Before lowering the basket into the ultrasonic cleaner, confirm the IPA is at the recommended 30° Celsius temperature using a thermometer. The ultrasonic cleaner will slightly rise in temperature during the cleaning process so monitoring the temperature throughout the cleaning process is highly recommended for optimal part processing.
  2. Slowly lower the basket into the ultrasonic cleaner. Confirm parts are completely submerged.
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NOTE: As soon as the first part touches the IPA, you will start to create an IPA and Wax mixture. At some point this will become saturated depending on how many parts and how much support is on them. When it seems like the parts are taking too long to process, replenish the container with fresh IPA.

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  1. Replace lid and turn on the Ultrasonic agitator.

  2. Observe your part(s) every 20 seconds (+/-) to see the progress of the support material dissolving. This will happen relatively quickly. 

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Note: Depending on geometry of part(s), saturation of wax in alcohol (cloudy appearance) and agitation speed, results will vary moderately on the amount of time the support wax is removed from the build part.

  1. Once the part(s) look free of support material, turn off agitator and remove basket from cleaner and place on dry paper towels.
  2. Place the basket into a 2nd IPA bath (room temperature) to remove any residual support material off part. Slowly swirl the basket around manually for no more than 10 seconds.
  3. Remove basket and place on dry paper towels.
  4. Carefully remove the delicate part(s) from basket and allow them to air dry. Part(s) are very delicate, so handle with care.
  5. Finished processed part(s) below. As you can see there is white residue left on the part(s). This is a combination of evaporated IPA and the dried surface of the wax. This will have NO affect on casting.

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