Method for production of heat-resistant container

摘要

An invention of a method for production of a heat-resistant container, in which a raised bottom portion is displaced inwardly by reduction in internal pressure, is disclosed. The method is characterized by forming a raised bottom portion 11 smaller in wall thickness than a surrounding wall portion 12a by first blow molding using a heat-treating blow mold; and pushing up the raised bottom portion 11 by a secondary bottom mold, in performing second blow molding using a final blow mold, to increase the wall thickness of the surrounding wall portion 12a (ground portion 12) relative to the raised bottom portion.

主权项

1. A method for production of a heat-resistant container, comprising:
forming a raised bottom portion, which is displaced inwardly a predetermined amount and which is smaller in wall thickness than a surrounding section, in a bottom section of a molded product; and performing blow molding to form a folded-back portion and a surrounding wall portion which surround the raised bottom portion, wherein when the blow molding is performed, a site of the bottom section is pressed from outside, whereby the folded-back portion and the surrounding wall portion are formed, with the surrounding wall portion being inhibited from thinning, so that the raised bottom portion will be further displaced inwardly beyond the predetermined amount in response to reduction of internal pressure.