INJECTION MOLD HAVING A WEAR RESISTANT PORTION AND A HIGH HEAT TRANSFER PORTION AND A METHOD FOR FORMING A PREFORM

摘要

Disclosed is a preferred mold design for producing plastic, injection molded preforms, which may be blow-molded into a container of a final, desired shap e. A preferred mold (500) includes a combination of hardened material component s (530a) and high heat transfer material components (530b) to provide a mold (500) having good wear characteristics, for a sufficiently long useful life, and to enable rapid cooling of the injected preform, in order to reduce the cycle time of an injection and cooling cycle. In some arrangements, the hardened materials may form a portion of the preform cavity thereby slowing the rate of cooling in those areas and inducing a semi-crystalline or crystalline structure in the cooled preform.