Free download · FreeCAD workbench

Rotary Moulder Workbench

Design industrial rotary cookie & cracker moulder drums in FreeCAD — drafted cavities, engraved or embossed details, docker pins, and full patterning around the drum. Free and open source.

Download (.zip) ↓ View on GitHub →

FreeCAD 1.1 (tested on 1.0) · requires the free Curves Workbench · LGPL-2.1-or-later

A drafted cavity wrapped onto a rotary moulder drum in FreeCAD

What it does

You sketch a cookie outline — plus optional letters, shapes, and docker-pin positions — on a flat sketch. The workbench wraps it around a cylindrical drum and cuts a drafted cavity so the dough releases cleanly, then replicates it into a full, production-ready mould around and along the drum. It's the same kind of tooling behind the cookie rollers in my portfolio — packaged so you can design your own.

  • Drafted cavitiesProper release-angle taper with a conformal floor, so dough pops out cleanly.
  • Letter & shape detailsEngrave or emboss text and designs inside each cavity.
  • Docker pinsConical perforation pins with rounded tips — e.g. for crackers.
  • PatternsReplicate around and along the drum in a linear or alternating (brick-laid) layout.
  • Built for real drumsSensible defaults and a debug toggle to inspect construction geometry.
  • Open sourceLGPL-2.1 — free to use, modify, and share.

See it in action

Engraved lettering inside a cavity
Engraved lettering inside a cavity.
Finished cavity with embossed lettering and docker pins
Finished cavity with embossed lettering and docker pins.
Alternating brick-laid cavity pattern with embossed text and docker pins
Alternating (brick-laid) pattern with embossed text and docker pins.
Linear cavity pattern around the drum
Linear pattern around the drum.

Requirements

  • FreeCAD 1.1 (also tested with 1.0)
  • Curves Workbench (free — used to project sketches onto the drum)
  • License: LGPL-2.1-or-later

Install

  • Easiest: FreeCAD → Tools → Addon Manager → add this repo as a custom repository → install Rotary Moulder → restart.
  • Manual: unzip and copy freecad/rotary_moulder into your FreeCAD Mod folder, then restart.

Full step-by-step tutorial with screenshots: User guide (PDF).

Free, open source, yours to modify

Grab the latest release from GitHub. Found a bug or have an idea? Open an issue, or email me — I read every one.

Download (.zip) ↓

Built by Mike Passchier with Claude.ai · hello@mikesprototype.com

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