Ultrasonic Cleaner Method

 The below procedure is a general guideline to help the customer process their printed VisJet® M2 Cast parts with VisiJet Support Wax Remover (VSWR) in a Ultrasonic Cleaner. Your results may vary slightly from the below procedure. Before proceeding with this method 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 following all local safety procedures and regulations.

 

Items Needed:

  • Ultrasonic 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 3D Sprint. This .stl file is recommended to be printed on a Acrylate printer only. Do not print this .stl file using VisiJet® M2 Cast material.

 

  • Safety goggles
  • Nylon hold-down netting and wire or cord or plastic rods for hanging parts
  • Nitrile gloves
  • VisiJet Support Wax Remover (VSWR)
  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, and a pair of Nitrile gloves for the remainder of this procedure.
  2. Fill the ultrasonic cleaner with VisiJet Support Wax Remover to the maximum fill limit for your cleaner. Cover with lid and set temperature to 86°F (30° C).

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Note.png 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.
  1. Carefully place desired part(s) into a basket. Metal baskets will retain more heat and have the potential to melt or deform delicate parts.  A silicone net or a plastic sieve/colander/basket is preferred. The density of the wax parts is less than the density of the VSWR, so the parts will float and move around uncontrollably if not constrained. This may result in damaged parts and incomplete support wax removal. Some soft plastic netting or mesh can be used to keep the parts submerged. Thin flexible wire or plastic rods work best for rings and objects with holes. Mounting holes for parts can be made by using a very fine tip soldering iron. Take care to avoid accidentally melting the part material.
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  1. Before lowering the basket into the ultrasonic cleaner, confirm the VSWR is at 86° F (30° C) temperature using a thermometer. The ultrasonic cleaner will rise in temperature during use, 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 VSWR, you will start to create an VSWR 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 VSWR.

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  1. Replace lid and turn on the Ultrasonic agitator.

  2. Observe your parts every 5 minutes to check the progress of the support material removal and make sure parts are still restrained.

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

  1. Once the parts look free of support material, turn off agitator and remove basket from cleaner.
  2. Place the basket into a 2nd warm VSWR bath 77-86°F (25-30° C) to rinse any residual support material off parts. Slowly swirl the basket around manually for 10-20 seconds.
  3. Place part(s) into a warm plain water bath 77-86°F (25-30° C) to remove the slightly oily VSWR from part. Swirl part around manually for about 60 seconds or until all VSWR is removed.
  4. Remove part(s) from warm water rinse and place on dry paper towels.
  5. Finished processed parts below. As you can see there is a white coloration to the parts. This is a result of slight etching of the build wax. This will have NO affect on casting.

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