Mold Making Guides
Everything you need to go from a 3D model to a working two-part mold, whether you are casting silicone and resin or injection molding on a desktop machine. No CAD experience assumed.
How to Make a Silicone Mold from a 3D Model
The full workflow from 3D model to a flexible two-part silicone mold, including which route to take when you want a rigid printed mold instead.
STL to Mold: Convert a 3D Model into a Printable Two-Part Mold
What actually happens between uploading an STL and downloading two printable mold halves, and how to prepare a model that converts cleanly.
Parting Lines and Parting Planes Explained
The single decision that determines whether a mold works. How to read the scored plane list and when to override the recommendation.
Draft Angles and Undercuts in Mold Design
Why parts stick, tear, or trap themselves in a mold, and how to spot every problem surface using the color-coded demoldability heatmap.
3D Printed Molds for Resin Casting
Print settings, materials, and release strategy for casting resin directly in a 3D printed two-part mold.
Designing Molds for the INJEKTO 3 Desktop Injection Molder
The exact size envelope, shot volume limit, and channel geometry for desktop injection molding with the INJEKTO 3.
STEP vs STL vs OBJ vs 3MF: Which Mold File Format to Use
A practical comparison of the four export formats and the workflows each one belongs in.
Ready to make a mold?
Upload an STL or OBJ file and generate both mold halves in your browser. No signup needed to start.
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