English Abstract
The Flow Properties and Curing Behaviors in Mold and Mold Design

Nishizawa Institute of Technology, Izumiku, Yokohama, Japan
Nippon Gomu Kyokaishi,(2009),82(7),316-322 General Review in Japanese

The performances of metal mold will influence the properties and cost of rubber products.
Generally, the metal mold design for rubber products is more difficult than those for plastics because the rubber materials show the characterictic flow properties and curing behavior in mold cavities.
These fundamental rubber properties, such as flow properties, pressure loss and stress relaxation, are considered in order to design the metal mold, especially of vent hole, runner, gates structure, and gate layout.
At present these mold design technology has not been completely established yet. From now on, these study should be continued to elucidate more details.

Power Law Index, Pressure Loss, Stress Relaxation, Vent Hole, Runner, Gate, Cavity