Small tricks to reduce silicone shrinkage rate
The serious shrinkage of silicone is mainly due to the quality problems of the silicone itself. It is normal for the shrinkage rate of flip mold silicone extracted by adding powder or waste glue to be severe if the quality is not up to standard. So in order to reduce the shrinkage rate of silicone, it is necessary to use high-quality, well-known brands, and regular silicone manufacturers to produce silicone. The shrinkage rate of condensed silicone is ≤ 3 ‰, and the shrinkage rate of added silicone is ≤ 1 ‰.
In fact, shrinkage can also be reduced during the flipping operation. For example, adding fiber cloth or gauze after pouring glue during the flipping process can increase the toughness of the silicone mold and also slow down the shrinkage rate. When adding fiber cloth or gauze, it is important to note that it should be added before the liquid mold silicone is vulcanized, and it should be in contact with the silicone. Use a brush to press it as much as possible, allowing it to adhere to the silicone. You can also use fiberglass or gypsum to make a shell for better effect.
In addition to the quality and operation of silicone, there is another issue that is easily overlooked, which is the preservation of flip mold silicone. Some customers simply place the flip over silicone gel everywhere for convenience after use, and some even fold it up. Incorrect placement can also cause severe shrinkage of the flip mold silicone. After use, the silicone mold needs to be cleaned thoroughly. The mold can be filled with mold seeds or gypsum to prevent deformation and shrinkage. It also needs to be stored in a cool place away from direct sunlight.
When uncertain about the shrinkage of newly purchased liquid flip mold silicone, sample testing can be conducted first before bulk procurement. Legitimate flip mold silicone manufacturers can provide free sample testing of flip mold silicone, and can produce flip mold silicone suitable for your operation and use according to your usage requirements, habits, product performance requirements, etc.