Parametric Stepped TPU Epoxy Cup (Reusable, No-Scale Measuring)
We calculate the final price from your selected file. You review and accept it before payment.
Saved on this device.
Tired of using digital scales in the field or throwing away sticky, single-use plastic cups for small batches?
- Rating
- 0 / 5
- Likes
- 0
- Downloads
- 0
- Makes
- 0
- Views
- 8
- Reviews
- 0
Updated at source:
Model information
- Source
- Printables
- Category
- Tools
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
This is a reusable, fully parametric mixing cup designed specifically to be 3D printed in TPU. Because epoxy resin will not chemically bond to flexible TPU, you can simply let your leftover resin cure in the cup. Once hard, just squeeze the flexible walls and the solid epoxy puck pops right out—requiring zero solvents, scraping, or waste.
By default, the OpenSCAD file is configured for a 30ml batch at a 5:1 ratio, but it is 100% parametric. Change the variables for your preferred batch size or mix ratio, and the cup will automatically recalculate the chamber volumes and update the embossed text on the bottom.
Key Design Features:
Foolproof Stepped Measuring: Features two precisely calculated volume chambers. Pour your hardener to the first sharp internal ledge, then pour your resin to the top rim. You get a perfect ratio every time, without a scale.
Support-Free Teardrop Profile: The pouring spout is extruded entirely to the build plate. This completely eliminates printing overhangs while creating a solid spine that acts as a secure thumb grip and adds base weight to prevent tipping.
Dual Mixing Fillets: Both the hardener chamber and the resin step feature perfect 5mm internal radiuses. This eliminates sharp 90-degree corners where unmixed hardener gets trapped.
Inverted Drainage Notches: The top rim features spaced notches (intentionally skipping the spout) so you can rest the cup upside down to slowly drain viscous epoxy after a pour.
Spill Catcher: A flared rim catches accidental overfills before they run down the side of the cup.
Matching Reusable TPU Stirring Paddle: Also included is the code for a matching TPU stirring paddle. Why use disposable wooden stir sticks that splinter, introduce micro-bubbles, and fail to reach the corners?
Perfectly Matched Geometry: The paddle's tip is engineered with a 5mm radius that perfectly matches the internal fillets of both the hardener and resin chambers. It sweeps the bottom and the stepped ledge flawlessly, ensuring no unmixed hardener is left behind.
Zero Waste Cleanup: Just like the cup, epoxy will not bond to the TPU paddle. Wipe off the excess, let the residue cure, and peel it right off for the next batch.
Ideal Flex: At 2.4mm thick, it is rigid enough to churn thick, cold epoxy but flexible enough to firmly scrape the inner walls. Print it flat on the build plate.
Printing Recommendations:
Material: TPU (95A or similar).
Walls/Perimeters: 4 to 6 walls to ensure watertightness against low-viscosity resins.
Infill: 20-30% Gyroid.
Temps: Print 5-10°C hotter than your usual TPU profile to maximize layer adhesion and minimize layer lines.
License & Commercial Use: This model is released under a Non-Commercial license. It is free for personal use and individual makers. For volume production, commercial sales, or inclusion in commercial kits, please contact me directly to arrange a commercial license.