Low hardness silicone rubber products forming edge burst reason
In the production of silicone products, low hardness of silicone products in molding control is not good, there will be a rupture at the edge, is commonly known as the edge of silicone products, why low hardness of silicone products will burst? What should we do when facing the edge?
Low hardness (about 30 degrees) of the rubber material is easy to appear in the forming of wind (bubbles) and other bad, if it is the color of the silica gel body or translucent color is also easy to see many small white points in the silicone products.
Solution: Improve the method of mold temperature, the mold temperature will be improved appropriately.
When the mold temperature increases, the wind (bubbles) and white spots are solved, but the edge of the silicone products began to crumble, that is to say, there is a burst. In this way, a dead cycle is formed, increasing the die temperature will burst the edge, reducing the die temperature will appear bag wind (bubbles) and bad white spots.
Solution: reduce the molding die temperature, if the appearance of wind (bubbles) and white spots on the extension of vulcanization time. The molding temperature must drop sharply, until the silicone products do not explode so far, do not think that the drop of four or five degrees of mold temperature can be solved. Exhaust stroke and frequency must be controlled well, exhaust frequency as little as possible, if you can reduce the exhaust stroke as far as possible. The addition of vulcanizing agent can also be appropriately reduced. The edge of the self-disassembling mold of silicone products is too sharp or burrs exist.
Summary: silica gel products are easy to appear in the hardness of 30 degrees or so, generally more than 50 degrees is rare, such as silicone buttons, so we understand the low hardness of silica gel products after the edge, in the face of this situation to prevent and repair, so as to ensure the orderly development of silica gel products factory.
