Blow-molded container and closure, and method and apparatus for making same
View Patent ↗A blow-molded plastic container and reinforced lid are simultaneously produced in a blow mold. A lid is reinforced by having a portion of the lid formed by blow molding techniques and another portion of the lid formed by compression molding techniques. The container and lid combination, a method for making the combination and apparatus for making the combination are provided.
1. Apparatus for manufacturing a container and associated closure, comprising:
a set of mold blocks moveable from an open position to a closed position to capture an extruded parison therein, and moveable from said closed position to said open position for releasing a container body and closure therefrom;
said mold blocks, when closed, cooperating to form a blow molded container forming cavity and a separate closure forming cavity which includes a blow-molding section and a compression molding section;
a first blow pin extendable into said container forming cavity for forming a blow-molded container body therein; and
a second blow pin extending into said blow molding section of said closure forming cavity for forming a blow molded portion of the closure, said compression molding section forming a remaining integral compression molded portion of the closure.
2. Apparatus according to claim 1 , wherein said mold blocks and first and second blow pins are operable to substantially simultaneously form the blow molded container body and partially blow molded, partially compression molded closure.
3. Apparatus according to claim 2 , wherein one of said mold blocks includes an ejector plate which is adjacent said closure forming cavity and which is movable by extendable cylinders for causing the formed closure to be released from said mold blocks.
4. Apparatus according to claim 2 , wherein one of said mold blocks includes at least one extendable pin adjacent said container forming cavity, said pin being extendable into said container forming portion for forming undercuts in the blow molded container body and being retractable so that the blow molded container body is releasable from the mold blocks.