Mechanical & Enclosure Design for Electronics
Enclosures engineered around the electronics they protect — CAD, thermal paths, seals, and a clean handoff to tooling.
What is enclosure design for electronics?
Mechanical and enclosure design gives an electronic product its physical form: the housing, mounting, thermal paths, seals, and user-facing surfaces around the PCB. We design enclosures in 3D CAD alongside the board itself, so connectors line up, heat gets out, and the parts are ready for molding, machining, or printing.
Designed with the board, not around it
Most enclosure problems are really board problems discovered too late: a connector two millimeters from where the wall needs it, a tall capacitor under a low lid, mounting holes that miss every boss. When mechanical design happens in the same room as the layout, these collisions get resolved in CAD, where moving a part costs nothing.
We run live ECAD/MCAD exchange during layout. The board outline, keep-outs, and connector positions stay synchronized in both tools, and the first physical prototype is a confirmation rather than an experiment.
Design for the process you will use
A beautiful enclosure designed for the wrong process is a redesign nobody has scheduled yet. Molded parts need draft angles, uniform walls, and early decisions about sink marks and gate locations. Machined parts want geometry a cutter can reach. Printed parts tolerate almost anything, which makes them a dangerously misleading way to prototype a part destined for steel.
We pick the target process early and design to its rules from the first sketch, then prototype in a way that stays faithful to how the production part will really behave.
3D-printed vs. machined vs. injection-molded enclosures: which process fits your volume?
The same enclosure design costs wildly different amounts depending on how it is made. Printing wins below a few hundred units, machining suits rugged low-volume products, and injection molding converts a large tooling bill into the lowest possible unit price. Volume, finish, and timeline pick the process.
| 3D printed | CNC machined | Injection molded | |
|---|---|---|---|
| Economic volume | 1–500 units | 1–1,000 units | 1,000+ units |
| Up-front cost | None | Fixturing only | Tooling, typically five figures per part |
| Unit cost at volume | High and flat | High, driven by machine time | Lowest — resin and seconds of press time |
| Materials and finish | Growing material menu; visible layers unless finished | Engineering plastics and metals with excellent finish | Full thermoplastic menu, textured or polished from the tool |
| Design freedom | Highest — internal geometry impossible any other way | Limited by tool access | Needs draft, uniform walls, and DFM discipline |
| Change tolerance | Reprint overnight | Reprogram quickly | Steel changes are slow and expensive |
Mechanical work around the electronics
From board outline to production housing
- 01
Envelope & Stack-Up
Board outline, connector placement, display, and battery are negotiated between electrical and mechanical at the start, while both sides can still move.
- 02
Structure & Process
Walls, ribs, bosses, and fastening are designed for a manufacturing process chosen early, because a molded part and a machined part want different geometry.
- 03
Thermal & Sealing
Heat paths and gaskets are engineered in, not patched on: where the watts leave the box, and where the water stops.
- 04
Prototype & Tooling Handoff
Printed or machined verification units prove fit and assembly, then the design ships as tooling-ready CAD and drawings, with support through first shots.
The CAD package
Processes and materials
Mechanical & Enclosure Design FAQs
Yes. We model the board, its connectors, and its keep-outs in CAD and design the housing around them. Expect direct feedback along the way: when a connector sits a few millimeters from where the enclosure wants it, a small board revision is sometimes cheaper than the mechanical gymnastics needed to avoid one.
With the electronics, not after them. The most expensive enclosure problems are baked in during board layout: connectors that cannot reach the wall, tall parts under a low lid, and heat with no path out. Co-designing costs nothing extra and removes a whole class of redesigns.
Sealed designs up to IP67 with gaskets, membrane vents, and sealed connector selection. Two caveats: the rating has to be designed in from the start rather than retrofitted, and the claim is only real after a test lab verifies it on production-representative units, which we help arrange.
We carry the design through tooling readiness and stay engaged during tool bring-up: DFM review with the molder, evaluation of first-shot samples, and drawing revisions until parts pass. The molding itself happens at a tooling shop; the engineering side of that handoff is ours.
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