Magnetic Platen for Tow-Color Injection Molding Machine
For two-color injection molding machine, we offer custom designing and manufacturing an 180° rotary magnetic platen on the movable side, enabling quick mold changes for twin-injection units.
For multi-injection injection molding machine, we offer tailored solutions featuring a magnetic platen equipped with multi-injection nozzles on the fixed side.
Application on Injection Molding Machine
8 Safety Measures of Magnetic Quick Mold Change System
The MAG cycle can only be performed when the mold is stably suctioned by magnetic platen.
During the injection molding process, if the magnetic flux value decreases, the machine stops immediately.
High temperatures reduce magnetic force; sensors halt production if the preset temperature is exceeded.
Current pulses are monitored during MAG/DEMAG cycles; successful release is reported only at set value.
Mold position is monitored; slight movement stops the machine.
Proximity switch ensures DEMAG cycle only if distance <0.2 mm; production stops if distance >0.2 mm.
Automatic injection program can be initiated only if sensors are normal, platens magnetized, and safety key is in position. Any other conditions trigger an alarm and stop the operation.
Safety key selects setup or injection mode. Demagnetize requires pressing LOCK and DEMAG simultaneously. DEMAG is unavailable during production.
Working Principle of Magnetic Quick Mold Change System
- An excitation current is passed through the solenoid coil for 0.1-0.5s.
- Neodymium magnet and AlNiCo magnet become unipolar.
- The magnetic poles forms a magnetic circuit with the mold and clamping the mold.
- An excitation current is passed through the solenoid coil for 0.1-0.5s.
- Pole of AlNiCo magnet is inverted.
- Magnetic Flux of Neodymium magnet and Alnico magnet is not emitted from the surface of the magnet core. Thus, it unclamps the mold.
