What are the reasons that affect the molding of silica gel products?

    Silica gel products before molding there will be many factors will affect, in addition to the vulcanization temperature, injection pressure and other operational control parameters on molding products, there are many other factors have a great impact on the product, what are the specific, the following Kemet silica gel with you to understand.
    First, vulcanization pressure: refers to the pressure exerted by the vulcanization machine on the molding mold when the silicone products are vulcanized in the molding mold. The vulcanization pressure on the molded silicone rubber products is a very key parameter. The bad is that: When the silicone products forming vulcanization pressure is too low will lead to silicone products lack of glue, high load, thick base thickness, short length and other bad, and silicone products forming vulcanization pressure is too high will be made
    Into silica gel products low weight, thin base thickness, length and other bad, if silica gel products molding curing pressure value is set too high may also lead to damage curing machine.
    Two, forming temperature: refers to the silicone rubber products in curing molding temperature, by the upper and lower mold two groups of temperature. The die temperature is divided into the thermometer temperature, which refers to the temperature set in the vulcanizing machine, and the measured temperature is the actual temperature measured by the die temperature table.
   Three, product demoulding: silicone products vulcanization is completed from the mold cavity out of the process, is also the most critical step, because the front of the parameters are completed very well, if the demoulding is not appropriate, will lead to the rupture of silicone rubber products and affect production efficiency. So first of all, before the molding of the hydraulic press on the mold, it is necessary to wash the mold, especially the new mold, must be sandblasted or electroplating treatment. In addition, it can be achieved by spraying release agent and adding an appropriate amount of internal release agent to the compound.
    Four, curing time: silicone products molding curing time under high temperature and high pressure conditions. This time is determined by the structure and volume of the product, the skilled and rusty action of the operator, the proportion of vulcanizing agent added to the rubber, the characteristics of the rubber, the way the rubber is discharged in the molding mold of silica gel products, the parameters of the exhaust and other factors. The shortest can be tens of seconds, and the longest needs five or six hundred seconds or even longer. When curing time
    Setting too short will lead to incomplete curing of silica gel products (soft), bubbles and other bad, and curing time is too long will lead to silica gel products become brittle, difficult demoulding and other abnormalities.