In the process of the
CNC prototype designing, the most widely used product is the silica gel whose characteristics as follows: their viscosity is relatively thin, it is easy to operate, it cannot generate deformation phenomena and will not shrink. It is relatively easy to do the removal treatment, the surface of the mold is very smooth and it has achieved good effects in simulation.
Generally speaking, the silica gel is a flow liquid, which is mainly component of silica gel, and other hardening agent, which accounts for around 4%. For example, get 100g silica gel, which requires 4g hardening, then put the hardening into the silica gel, be sure to stir evenly, so that produce a complete silica gel.
Note that the proportion of the silica gel and hardening must be measured accurately on the balance or the electronic balance. At the same time, we should consider the local temperature, generally we conduct the ratio according to this proportion.
