Injection-blow molding apparatus with parison heat redistribution means

An apparatus for forming a biaxially oriented hollow article comprising the combination of:

• a. support means carrying an injection mold and an expansion mold, said injection mold having a fluid cooling passage therein for circulating a fluid at a first temperature;
• b. core support means operatively associated with said support means carrying a core for sequentially indexing the core in juxtaposition with the injection and expansion molds and the core having a fluid cooling passage for circulating a fluid at a second temperature higher than the first temperature and the core support having fluid expansion passages therein for cooling and expanding a parison;
• and
• c. means operatively associated with said support means to index the parison to and maintain the parison at a time delay station to permit the parison formed on said core to redistribute its heat from the interior of the parison throughout the parison prior to indexing the core into juxtaposition with the expansion mold.