How to Achieve Waterproof 3D Prints with the Extrusion Multiplier
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Introduction to Waterproofing 3D Prints
The advent of consumer 3D printing has transformed how we express creativity. For certain applications, such as creating planters, it’s essential to ensure that your prints are waterproof. There are various techniques to achieve waterproofing, but this guide will concentrate on adjusting the extrusion multiplier in a straightforward, step-by-step manner. Please note that making your prints waterproof does not equate to making them food-safe; this topic will not be covered here.
Printer Settings for Waterproofing
Different users may have unique settings that yield the best results. Below are my recommended settings using Simplify3D, which serve as a reference:
- Nozzle diameter: 0.40 mm
- Extrusion multiplier: 1.10
- Primary layer height: 0.3000 mm
- Top solid layers: 5
- Bottom solid layers: 3
- Outline/perimeter shells: 2
- Outline direction: Outside-in
- Infill percentage: 30%
- Hot end and bed temperature: Adjust according to filament specifications
- Default printing speed: 90 mm/sec
- Outline under speed: 55%
- Solid infill under speed: 45%
Testing Your Waterproofing Skills
To evaluate the waterproofing capability, I created a hollow cylinder, which you can find on Thingiverse. I made the design slightly larger to facilitate water testing.
- Ensure that your 3D printer is correctly leveled. Many models come with leveling commands to help position the extruder accurately; I won’t cover leveling in this guide, but you can find resources for that here.
- Print the design with the settings mentioned above. My print took about 45 minutes at a speed of 90 mm/sec.
- Once the print is complete and has cooled for about 5–10 minutes, prepare a paper towel and fill the hollow section with water.
- Verify the waterproofing by checking for any leaks. If water seeps out from the sides or bottom, elevate the print for a clearer view, as even minor leaks can be problematic for applications like plant holders.
- In case of leaks, consider increasing the extrusion multiplier in increments of 0.05–0.10.
- Continue adjusting the extrusion multiplier until no water escapes.
- Once you've achieved a leak-proof print, add an additional 0.10 to the extrusion multiplier to ensure consistency in waterproofing, especially when dealing with challenging boundaries or variations between prints.
Conclusion
Congratulations! You've successfully waterproofed your first 3D print. Feel free to experiment with your settings to achieve the desired outcomes.
Watch the following videos to enhance your understanding:
Mastering Watertight 3D Prints: The Ultimate Guide
This video provides a comprehensive overview of techniques for achieving watertight 3D prints, including practical tips and best practices.
Effect of Extrusion FLOW RATE on the Strength of 3D Printed Objects
This video explores how the flow rate during extrusion affects the overall strength of your 3D printed items, ensuring durability and functionality.