What caused the wrong size of silicone button?

In the production of silicone keys, sometimes the size is wrong, which is either large or small, which not only affects the efficiency but also affects the factory. Then what is the reason for the big difference between the size of silica gel keys and the original?

Mould temperature

Too high forming temperature will accelerate the vulcanization of the silicone button adhesive, leading to the decline of the flow performance of the silicone button adhesive in the forming mold, leading to the silicone button size is too small, too thick.

pressure

1. When the forming pressure is too high, the size of the silicone button is too long.

2. When the pressure is too low, the size and thickness of silica gel products are too small.

Weight of molding compound

1. Discharge too much glue, resulting in the high load of silicone button bubbles and silicone button, leading to the larger size of silica gel products

2. The weight of discharge glue is too light, resulting in the small size of silicone products after forming.

Poor silicone key size is a functional defect. Different from poor appearance of silicone key, once the size of silicone key is abnormal, it will be scrapped and there is almost no possibility of repair.So in the production process of silicone keys need to pay special attention to control the size of abnormal generation.Once the cause is found, the problem will be solved easily.