Working conditions
Identify temperature, contact fluids and repeated movement.
Custom manufacturing example · Membrane electronic silicone keypad for calculator
CUSTOM RUBBER & SILICONE MANUFACTURING
Membrane electronic silicone keypad for calculator
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
A silicone keypad for calculator layouts should place each key over its intended switching position while remaining free within the housing openings. A numeric grid can make a small alignment error affect an entire row, so the locating features and web dimensions matter alongside the shape of each button. The keypad is one part of the completed input assembly.
Check key spacing, travel, and the support below the sheet. Select visible legends that suit the calculator layout, using the available printed or molded marking methods. The markings should remain readable at the viewing angle expected during normal use.
Fit the keypad flat without stretching one side to meet a locating feature. Before closing the housing, keep the underlying contact region clean and verify the intended orientation. Test every key with the assembled electronics, including edge and corner keys that may experience different housing constraints. During care, avoid forcing liquid or debris into the key openings. A button that fails to return should prompt inspection for trapped material or housing interference before replacing the complete keypad.
- Material options
- Silicone. Custom formulation and color for the intended contact conditions.
- Hardness selection
- Silicone: 20–80 Shore A. Fit the keypad flat without stretching one side to meet a locating feature.
- Custom dimensions
- A numeric grid can make a small alignment error affect an entire row, so the locating features and web dimensions matter alongside the shape of each button.
- Fit & assembly
- A silicone keypad for calculator layouts should place each key over its intended switching position while remaining free within the housing openings.
- Use & inspection
- A button that fails to return should prompt inspection for trapped material or housing interference before replacing the complete keypad.
Photos illustrate structure or material only. A numeric grid can make a small alignment error affect an entire row, so the locating features and web dimensions matter alongside the shape of each button. 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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