Extend the life of silicon rubber mold technique

Want to make silicone mold longevity, then, first choice of material is necessary to choose the right high-quality silicone, sulfur and other materials, and then rely on the production of their master carefully point, according to our research and development department said: mold silicone rubber is widely used in the RPM technology by reinforcing materials hydroxy-terminated polydimethylsiloxane made??. In the catalyst (typically an organic tin) in the presence of which can be used with more than trifunctional crosslinking agent (usually a silicate) to a condensation reaction at room temperature vulcanizing silicone rubber having a certain mechanical strength. 　　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. 　　Do not want to make the product come to an end so quickly, resulting in unnecessary losses and waste of resources, it is a good understanding of knowledge and information related to it. For more information please call our free expert advice hotline 400-779-4008, or e-mail us info@szrl.net. There will be a surprise waiting for you.