Development and application of micro pressure-pickups to measure point-pressure of elastomer flow
We know three kinds of processes to mold rubber products: compression molding, transfer molding, and injection molding, among them there not being essential difference in view of considering only the basic relation between pressure and flow of rubber, or shearing stress and rate of shearing strain. The factors which govern the flow are polymer pressure, mold temperature, condition of mold surfaces, geometrical shape and dimension of runner, flow characteristics and curing characteristics of compound, etc. Molding engineers usually obtain the practically optimum values of these variables primarily after their own long experience through trial and error methods. It is, therefore, necessary for molding engineers to have more basically satisfactory data with which they can surmise the effect of each variable on the result of molds on purpose of making better design of molding process.
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