Transfer molding press

A mold tool comprising:

• a pressure source;
• a first pressure control cylinder;
• a second pressure control cylinder, wherein the first and second pressure control cylinder are coupled to the pressure source;
• a sliding block assembly which moves bi-directionally in a plane;
• a first plunger coupled to the first pressure control cylinder;
• a second plunger coupled to the second pressure control cylinder, wherein the first and second plungers are coupled to the sliding block assembly so that the first plunger applies pressure to a mold compound that is greater than the pressure applied by the second plunger;
• and
• a sensor coupled to the slidina block assembly and to one of the plunders that measures a distance the sliding block assembly moves relative to the one plunger.

A transfer molding press comprising:

• a hydraulic pressure source;
• a moving platen;
• a cavity plate overlying the moving platen, wherein the cavity plate has a plurality of pots connected to a plurality of cavities;
• a plurality of plungers each coupled to one of the plurality of pots in the cavity plate;
• a plurality of pressure control cylinders coupled to the hydraulic pressure source and each of the plurality of pressure control cylinders being coupled to one of the plurality of plungers;
• a sliding block assembly that is coupled to the plurality of plungers and moves in a direction substantially parallel to the plurality of plungers, wherein the plurality of pressure control cylinders permit at least one of the plurality of plungers to apply a pressure greater than the other plungers of the plurality;
• and
• a sensor coupled to the sliding block assembly and to one of the plurality of plungers that measures a distance the sliding block assembly moves relative to the one plunger.