INJECTION SYSTEM

First Stage: Slow Injection Starts

Injection start with the opening of the injection enable valve on the front chamber of the injection cylinder to allow hydraulic fluid flowing out and the opening of the slow injection spool type solenoid valve to allow hydraulic fluid flowing from pump into the back chamber of the cylinder.

Second Stage: Medium Speed Injection Starts

When plunger travels to programmed position, the medium injection speed cartridge valve opens to start the second stage injection. The medium speed injection is to bridge the wide gap between the extremely fast speed injection and the slow speed injection. The hydraulic power now comes from the accumulator.

Third Stage: Fast Speed Injection Starts

When plunger travels pass the programmed fast shot start position, all the injection valves open. The hydraulic power flows from the special designed low inertia high flow accumulator located right on top of the injection cylinder directly into the rear chamber and pushes the plunger to travel exceeds 280 inches per seconds velocity.

Intensification

Forth Stage: Fast Speed Injection Starts

shot is the most tricky yet important part of the die casting process. It makes or breaks the quality of the casting. Intensification has to start at the right moment within few milliseconds of time window to be effective. To ensure the effectiveness of the intensification, PacMar designs the intensification to start on both position trigger and back pressure trigger. Both can be adjusted to suite the user's particular application. The intensification cylinder rod also serves as a shut off valve for the fast injection. With fine tuned right timing, the PacMar intensification can both eliminates unnecessary flashing and intensifies the casting pressure.