The line on the surface of a molded part where the mold plates meet. The ram which applies pressure in the process of injection or transfer molding, forcing the material into the mold cavities. The process of baking or autoclaving parts after molding. The chamber in a transfer or injection mold where raw material is placed before it is transferred into the cavity. A seal used in a linear motion application.
Carbon black is the most commonly used reinforcing agent.
The ability of an elastomer to return to original size and shape after deforming forces are removed. The system for leading rubber and plastic materials into the gate of an injection mold. The cylindrical member which rotates or reciprocates through the I.D. of a seal. A durometer hardness instrument using a microindicator, designed for the purpose of measuring o-ring hardness. The linear contraction upon cooling of a molded rubber or thermoplastic part.