Injection molding method involves injecting plastic material under pressure from storage chamber arranged in mold forming mold cavity

摘要

An injection molding method comprises injecting plastic material under pressure from a storage chamber with a closable outlet into a mold cavity and filling it under pressure. The volume of storage chamber and the pressure obtaining upon opening of the closure mechanism are of values sufficient for filling of the mold cavity by expansion of the material in the storage chamber. The storage chamber is arranged in the mold forming the mold cavity. An independent claim is also included for an apparatus for carrying out the method. The volume of the storage chamber is at least five times as great as the volume of the mold cavity.