Temperature adjusting and compressing in injection stretch blow molding for forming raised portions in the container produced

A process comprising the steps of:

• forming a concavo-convex pattern on at least one of a temperature adjusting pot and core in a temperature adjusting device;
• injection molding a hot closed-end parison;
• adjusting the temperature of said hot closed-end parison by heating or cooling said hot closed-end parison in at least one predetermined location within the temperature adjusting pot in the temperature adjusting device;
• said temperature adjusting step further comprising:
• clamping the bottom portion of said hot closed-end parison between the temperature adjusting core and pot and thereafter moving at least one of said temperature adjusting core and pot toward the other by a predetermined amount, said concavo-convex pattern being transferred therefrom to the bottom portion of said hot closed-end parison by clamping and compressing said parison between said temperature adjusting core and pot under a predetermined pressure thereby creating a differential wall thickness in the bottom portion of said hot closed end parison;
• and
• blow molding the closed-end parison into a hollow container having a predetermined configuration after said parison has been adjusted in temperature thereby obtaining a predetermined concavo-convex pattern on a portion of said hollow container which corresponds to said concavo-convex pattern transferred to said hot closed-end parison.

A process comprising the steps of:

• injection molding a hot closed-end parison thereby forming a bottom portion of said hot closed-end parison into a cup-shaped configuration having an inner wall, said hot closed-end parison having a body portion, the internal diameter of which is larger than that of the cup-shaped bottom portion;
• adjusting the temperature of said hot closed-end parison by heating or cooling said hot closed-end parison in at least one predetermined location within a temperature adjusting pot in a temperature adjusting device;
• and
• blow molding the closed-end parison into a hollow container having a predetermined configuration after said parison has been adjusted in temperature;
• said temperature adjusting step using a temperature adjusting core having a tip with a concavo-convex pattern formed thereon in said temperature adjusting device to transfer the concavo-convex pattern from said temperature adjusting core to the inner wall of the bottom portion of said hot closed-end parison for obtaining a predetermined concavo-convex pattern provided to the bottom portion of a hollow container formed at the subsequent blowing step, wherein
• the tip of said temperature adjusting core is formed with said concavo-convex pattern formed therein having raised portions with an external diameter slightly larger than the internal diameter of said hot closed-end parison at its bottom portion, the tip of said temperature adjusting core being press fitted into the interior of the cup-shaped bottom portion of said hot closed-end parison, such that said parison is clamped and compressed between said temperature adjusting pot an core under a predetermined pressure, for said transfer of said concavo-convex pattern to the inner wall of said hot closed-end parison to create a differential wall thickness in said parison.