How to make silicone rubber keypad step by step?

Silicone keypad production typically employs traditional compression molding.

Key steps in silicone keypad production:

1. Pre-mixed silicone is cut to the required shape and thickness using a cutting machine. The silicone is usually specified for hardness and properties.

2. The vulcanizing machine is preheated to the specified temperature, typically around 180 degrees Celsius. Corresponding pressure parameters are also set.

3. After the vulcanizing machine reaches the specified temperature, a trial molding is performed. Sometimes, conductive particles are added according to specifications. These conductive particles are typically carbon, nickel, or gold particles. The trial molded sample undergoes various performance tests, such as hardness, curve analysis, and resistance.

4. For low VOC requirements, a secondary vulcanization process is performed on the vulcanized product. The vulcanization time and temperature are set according to different requirements or specifications.

5. Post-processing typically includes screen printing, spray coating, and laser engraving.

6. After this, the product undergoes a deburring process.

7. Finally, the finished product undergoes a final inspection, usually visual inspection.

8. Before entering the finished product warehouse, finished products will be sampled and subjected to tests such as curve and character drop tests.