Patent ID: 7431582

Claim:
A machine for compression molding plastic articles, which includes: a wheel mounted for rotation around an axis, a plurality of angularly spaced molds, each including a first mold segment, and a second mold segment, each of said second mold segments being movable with respect to the associated first mold segment between a closed position with said first mold segment and an open position spaced from the associated first mold segment for removing a molded article from said mold and placing a mold charge into said mold, one of said mold segments being a mold cavity including a mold cavity seat and a mold cavity insert within said seat, said seat and said insert having opposed surfaces that form first coolant passages between said seat and said insert, said seat having second coolant passages for connection to the coolant passages in said wheel for circulating coolant from said wheel through said cavity and back to said wheel, wherein said second coolant passages in said seat are such that said mold cavity, including said seat and said insert, is adapted to be rotated selectively to open and close said first and second passages to circulation of coolant.