Method for molding saturated crystalline polyesters and molding equipment therefor

An apparatus for molding a crystalline polyester resin having a crystallizing temperature Tc1, in .degree. C., into an article, said apparatus comprising:

• a molding machine body for molding molten polyester resin into a desired shape;
• and
• a starting resin feeder, operatively connected to said molding machine body, for supplying molten polyester resin to said molding machine body;
• said molding machine body including a screw means for transporting said molten resin and a mold for receiving said transported molten resin, said screw means comprising, in sequential order, a feed section for receiving said molten resin, a compression section for compressing and kneading said molten resin and a metering section for feeding said molten resin to said mold;
• said starting resin feeder comprising a drying hopper for heating said resin to a temperature below its melting point to dry said resin;
• a melting section, operatively connected to said drying hopper, for receiving dried resin and heating said dried resin to melt the dried resin substantially without adding mechanical shearing;
• and a quantitative feed section, operatively connected to said melting section, for quantitatively feeding molten resin to said feed section of said screw means, whereby the molded article has a crystallizing temperature Tc2, in .degree. C., where Tc1-20<Tc2<Tc1.