초록 ▼

A heat-resistant container molding apparatus and method which are compact and inexpensive and can reliably increase the crystallinity, reduce the residual stress in a container filled with a hot content such as thermally sterilized fruit juice, and prevent a thermal deformation with improved contain

A heat-resistant container molding apparatus and method which are compact and inexpensive and can reliably increase the crystallinity, reduce the residual stress in a container filled with a hot content such as thermally sterilized fruit juice, and prevent a thermal deformation with improved container stability at a raised temperature. The apparatus has a receiving and removing unit for receiving primary moldings obtained by blow-molding preforms and for removing final products, a heat treatment section for heating the primary moldings by bringing the primary moldings into contact with the inner wall of a heat treatment mold while pressurizing the interior of the primary moldings within the heat treatment mold, a final molding section for blow molding intermittent moldings into final products within a final blow mold, and a rotary plate, neck support fixing plate and neck support member for conveying the moldings through the receiving and removing unit, heat treatment section and final molding section.

대표청구항 ▼

[ We claim:] [1.] A blow molding apparatus for forming a heat-resistant container, said apparatus comprising:a primary molding section for blow-molding a preform into a primary molding, said primary molding section including a primary blow mold having split molds with inner walls defining a cavity,

[ We claim:] [1.] A blow molding apparatus for forming a heat-resistant container, said apparatus comprising:a primary molding section for blow-molding a preform into a primary molding, said primary molding section including a primary blow mold having split molds with inner walls defining a cavity, said cavity having an axial length greater than the axial length of said heat-resistant container;a heat treatment section for heat treating the primary molding at a temperature which progresses crystallization thereof, said heat treatment section including a heat treatment mold having split molds with inner walls defining a cavity, means for heating the split molds and means for pressurizing an interior of the primary molding within said heat treatment mold in order to bring the primary molding into contact with the inner walls of said split molds while the split molds are heated to heat treat the primary molding and thereby remove residual stress produced in said primary molding, said heat treatment mold having a cavity configuration substantially equal to that of said primary blow mold and different from the outer surface of the heat-resistant container, thereby obtaining an intermediate molding which is heat shrunk after being removed from said heat treatment mold; anda final molding section for blow-molding the intermediate molding into the heat-resistant container, said final molding section including a heated final blow mold having split molds with inner walls defining a cavity with an axial length which is less than the axial length of the primary blow mold and heat treatment mold.