Limited rolling time-domain hybrid tracking control method for batch injection molding process
A technology of tracking control and rolling time domain, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of reducing the economic benefit of the control system, the decline of control performance, and the inability to adjust the gain of the controller
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[0122] The injection molding process is a typical batch production process, and each batch mainly includes three steps, namely injection section→pressure holding section→cooling section. In the injection section, the screw moves forward to extrude the melt stored at the front end of the barrel (the raw material is heated by the heating ring) forward, flows through the runner, the runner, the gate, and enters the closed mold cavity ( inside the mold cavity). When the cavity is completely filled, the molding process switches from the injection section to the pressure holding section. In the pressure-holding section, the screw advances at a very low speed to maintain a certain nozzle pressure. A small amount of melt continues into the mold cavity, compensating for volume shrinkage due to cooling and solidification of the material. Once the gate with the smallest cross-sectional area in the mold is substantially solidified, the packing section stops and the process enters the co...
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