INJECTION-MOLDING OF THERMOSETS BY THE HOT-CONE PROCESS

The injection moulding of thermoset moulding compounds usually requires a longer cycle time than thermoplastics materials. A specially designed high-temperature sprue-system is well-suited for reducing the heating period normally required for this type of moulding compound. The material thus enters the cavity at an already elevated temperature. In addition to the cycle time reduction, the process also benefits from other advantages. Results from investigations involving simulation calculations as well as numerous variations of the hot-cone process are discussed in the text.