How to Extend the Usage Life of Silicone Moulds

Then vulcanized silicone rubber has the following advantages:

　　1 includes a natural releasability;

　　2 can be used in a wide temperature range of -50 ~ 350 ℃. And vulcanized silicone rubber RTM also has certain applications. Compared with the traditional mold, silicone rubber mold with high accuracy, short processing cycle (typically can be completed in one day), low cost, easier to mold.

　　Mold silicone rubber vulcanization process is actually increasing crosslink density process, the crosslink density can be expressed as the hardness of the external rubber curing agent was 0.5% silicone rubber vulcanization not work; When the curing agent is greater than 0.8% when, with the amount thereof is increased, the final silicone rubber crosslink density has also increased, but when the amount exceeds 1.2% curing agent, silicon rubber cross-linking density of the final stabilized. Crosslink density and time of silicone rubber is also a relationship, the initial small but grew faster, 24h, its crosslink density is stabilized. Silicon rubber mold in the production process should pay attention to:

　　1 After 24 hours, the vulcanization really reflect, so in order to increase the number of silicon rubber mold, then turn the mold, silicone rubber mold a good system should be placed.

　　Raise the temperature of the curing reaction 2 also promoted, to silicone molds placed in an oven at 150 ℃, the need to reach room temperature for 24 hours to reach hardness. When tight production tasks can usually be placed in the mold 80 ℃ oven for 6 ~ 8h, its turning model number may also have improved greatly;

　　3 silicon rubber mold of course, if the infusion materials containing solvents, they will have to be taken to avoid the swelling effect of silicone rubber.