Magnetic Stirrer Hot Plate Method

 The below procedure is a general guideline to help the customer process their printed VisJet® M2 Cast part. 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:

  • Magnetic hotplate stirrer
  • Silicone net or a 3D printed Acrylate basket
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Note: A scalable .stl basket file can be found here: Acrylate Circular Basket.STL. This .stl file can be sized to fit your glass container 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® M3 Cast material.

  • (2) 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. Turn on your magnetic stirrer hot plate to 35° Celsius. If your hot plate does not have an exact temperature setting, then use a infrared thermometer. Adjust the heat dial until 35° Celsius is achieved.
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Caution: Parts will lose detail/melt if cleaning at temperatures exceeding 35° Celsius.

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  1. Fill an approved glass container with 99%> Isopropyl Alcohol (IPA) and leave at least 1” of space from the top of the container.  Place on hot plate and cover with the lid to avoid evaporation. 
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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. Carefully place desired part(s) into bottom of basket. Do not double stack parts.
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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. Remove the lid from the container. Gently lower the basket in the container. 

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  1. Turn on stirrer to a low/medium setting so that there is a nice smooth circulation in the container. If IPA is splashing out of container, turn your settings down.

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  1. Replace lid facing upside down on top of basket. This will help reduce evaporation.

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  1. Observe your part every 30 seconds (+/-) to see the progress of the support material dissolving. 

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  1. This part was removed from the basket after 2 minutes. You can clearly see the support material dissolving away from the build material (M2 Cast). 

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Note.png Note: Depending on geometry of part(s), saturation of wax in alcohol (cloudy appearance) and stirrer speed, results will vary moderately on the amount of time the support wax is removed from the build part.
  1. Once your part(s) looks visually free of support material, turn stirrer dial to "0" and remove basket. Place basket onto a dry paper towel.

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  1. Secure lid on container and turn off magnetic hot plate if no additional parts will be further processed.
  2. Place the basket into a 2nd IPA bath (room temperature) to remove any residual support material off part. Swirl the basket around manually for no more than 10 seconds.
  3. Remove basket and place on dry paper towels.
  4. Carefully remove part from basket and allow them to air dry. Part are very delicate, so handle with care.
  5. Finished processed rings below. Below is  there is white residue left on the rings. This is evaporated IPA. This will have NO affect on casting.

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