Liquid silicone injection mold curing reaction occurs at mold temperature 120 ~ 150℃, mold temperature control is very important:

The mold surface temperature need to be stable:

If  the surface temperature is too high, the products will be burnt, the parting line cracking, the products become brittle and so on.
If  the surface temperature is too low, adhesive curing speed is slow, there will be products can not demoulding and other quality problems;

The temperature of the mold should be heated evenly

If mold heating is not evenly, the temperature difference is large to make the rubber material flow instability, easy to appear air, injection dissatisfaction and other phenomena;

The location of heater:

A sufficient distance should be kept between the heater and the parting line to prevent the work from warping and deformation, resulting in the formation of overflow burrs in the finished product;

Comparison of mode temperature control heating methods

Heating rod heating:
The heating rod is drilled by gun drill. The gap between the heating rod and the hole will lead to uneven heat transfer, and the heating rod is easy to be damaged. In addition, multiple groups of heating rods share one group of temperature sensing, so the damage of the heating rod cannot be detected, and the mold temperature is uneven. Careful choice

Heating plate:
The heating plate is designed at the bottom of the die kernel, close to the die kernel. The heating plate is designed with independent temperature sensing and closed-loop design to ensure that the temperature is controllable and the temperature of the heating plate is uniform. proposal uses