A PLC injection molding machine uses a Programmable Logic Controller to automate the precise clamping, melting, injection, cooling, and ejection of plastic parts. It replaces manual relays with a digital system to control hydraulic pressures, temperatures, and cycle timing.
Main Parts & Control Features
PLC Core: Manages the sequential steps, inputs from sensors, and output signals to valves and motors.
HMI Touch Screen: Provides a graphic interface for operators to set temperatures, speeds, and pressure limits.
Clamping Unit: Locks and unlocks the steel mold securely under high tonnage.
Injection Unit: Melts plastic resin inside a heated barrel using a rotating screw, then pushes it into the mold.
PID Temperature Control: Regulates multi-zone barrel heaters accurately to prevent overheating or material degradation.
