cover.png

CNC Coffee Percolator (Design)

CNC milled coffee percolator making espresso style coffee. This moka style cofee maker works at high pressure to achieve quality coffee within its small and unique form. This design was a project designed and manufactured by Matthew Derry at RISD

StoveTop Coffee Percolator

Areas of Focus: Finite Element Analysis, Manufacturing / Fabrication, Product Design

Project Length: 3 months

Participants: Matthew Derry

 

Design Intention

The product aims to produce “moka-pot” style coffee at a higher pressure, producing roughly two shots of espresso. In standard coffee percolators, this process occurs at pressures of 1-2 bar, true espresso is produced at 8-9 bar of pressure. By CNC milling instead of casting these pieces along with reworking the fundamental geometry the design aims to achieve a higher pressure (4-5 bar) and thus, a stronger, richer cup of coffee.

 


HOW PERCOLATION WORKS

In order to achieve the necessary pressure in the lower reservoir, the product is heated on a stovetop. As the pressure increases the water is forced through the coffee grounds.

FORM IDEATION

PRODUCTION IDEATION

Continued ideation revolved around solving the technical and manufacturing challenges that this project presented.

FInAL DESIGN


HOW TO USE - STEP BY STEP

 

FABRICATION - CNC MILLING

The final model was built using Solidworks then the toolpaths were designed using a HSMworks plugin. Everything was machined from a 3” x 5” and a 2” x 2” block of 3003 Aluminum.

DESIGN DETAILS


THANK YOu!