Working conditions
Identify temperature, contact fluids and repeated movement.
Custom manufacturing example · Carbon pill conductive rubber silicone keypad overlays
CUSTOM RUBBER & SILICONE MANUFACTURING
Carbon pill conductive rubber silicone keypad overlays
A custom component for your assembly.
Define the mating surfaces, dimensions and working conditions. ETOL manufactures the part to the agreed design and material.
- Factory direct
- Made to order
- Drawing & sample support
Share the part, its application and your estimated quantity.
Customize the fit, material and finish
Material & hardness
Selected for the contact, temperature and movement
Color & finish
Define the visible surfaces and intended color
Shape & dimensions
Develop holes, lips and walls around the mating parts
Mounting & fit
Match the attachment and installation method
Product Overview
Conductive silicone keypad overlays with carbon pill contacts form part of a layered control assembly. The overlay sits between the user's finger and the matching circuit area, so its installed spacing determines when a press reaches the contact and when release separates it again. The custom layout needs to follow the whole stack of parts.
Review the thickness and support of the enclosure and internal components together. A change beneath the overlay can alter the resting gap even when the top key positions remain unchanged. The overlay should sit naturally without a section suspended over an unsupported area or compressed beneath an unrelated feature.
Operate the keys after the enclosure is fully secured. Check presses across the full array, including those made away from the center of a key. The contact should return to its intended unpressed state after each action. Keeping that movement independent across neighboring keys is part of the assembled fit assessment.
Size and color can be customized for the product. Protect the carbon pill surfaces from contamination during fitting and avoid scraping them during service. When replacing an overlay, preserve the specified contact pattern and support geometry as well as its visible dimensions, since those hidden details determine how it meets the circuit.
- Material options
- Silicone. Custom formulation and color for the intended contact conditions.
- Hardness selection
- Silicone: 20–80 Shore A. The overlay sits between the user's finger and the matching circuit area, so its installed spacing determines when a press reaches the contact and when release separates it again.
- Custom dimensions
- The overlay should sit naturally without a section suspended over an unsupported area or compressed beneath an unrelated feature.
- Fit & assembly
- Keeping that movement independent across neighboring keys is part of the assembled fit assessment.
- Use & inspection
- Protect the carbon pill surfaces from contamination during fitting and avoid scraping them during service.
Photos illustrate structure or material only. A change beneath the overlay can alter the resting gap even when the top key positions remain unchanged. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.
From part requirements to production
01
Define the part
Identify key dimensions, mating surfaces and quantity
02
Review material & tooling
Agree the compound and manufacturing approach
03
Evaluate the sample
Review the fit and agreed requirements in the assembly
04
Produce & inspect
Manufacture and check against the approved requirements
Review the intended assembly
Material and structure
Consider hardness together with wall thickness and support.
Installation
Check access, mating dimensions and the fitting sequence.
Ordering this custom component
Can the shape be adjusted to my mating parts?
Yes. Show the receiving opening, contact surfaces and clearance limits. We can review the dimensions and retaining features around the intended fit.
Which details should be agreed before tooling?
Agree the critical dimensions, material, hardness, visible surfaces and sample requirements. Explain how the part is installed and which interfaces control its function.
Can a sample help define the replacement?
A sample can help explain the structure. Compare it with the assembly because wear, swelling or compression may have changed its original dimensions.
How is the quotation for this part determined?
The material, part geometry, tooling, quantity and finishing affect the quotation. Include the intended batch size and delivery destination when describing your requirements.
DISCUSS THIS COMPONENT
Describe the part you need.
Share the fit, operating conditions and quantity with our manufacturing team.
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