Custom made membrane keypad prototype silicone rubber keypad

A membrane keypad prototype helps evaluate how a custom silicone actuator works with the intended switching layers and enclosure. The useful outcome is a verified relationship between those parts, including resting height, travel, support, and user access. A prototype's appearance alone does not establish production lifetime or sealing performance.

Assemble the representative layer stack rather than testing the silicone sheet by itself. Include spacers, overlays, and normal fastening conditions where they are part of the design. Check for a button that is preloaded when the housing closes or one that reaches an obstruction before completing its intended movement.

Try realistic input sequences and edge presses, recording which geometry or assembly condition produces an issue. If a revision changes thickness or support, reassess the whole affected stack rather than only the visible cap. Protect membrane layers from creasing during repeated assembly. Keeping the evaluated configuration identifiable makes comparisons between revisions useful and helps avoid attributing a change in behavior to the wrong component.

Material options

Silicone. Custom formulation and color for the intended contact conditions.

Hardness selection

Silicone: 20–80 Shore A. Check for a button that is preloaded when the housing closes or one that reaches an obstruction before completing its intended movement.

Custom dimensions

If a revision changes thickness or support, reassess the whole affected stack rather than only the visible cap.

Fit & assembly

Try realistic input sequences and edge presses, recording which geometry or assembly condition produces an issue.

Use & inspection

Keeping the evaluated configuration identifiable makes comparisons between revisions useful and helps avoid attributing a change in behavior to the wrong component.

Photos illustrate structure or material only. Try realistic input sequences and edge presses, recording which geometry or assembly condition produces an issue. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.