Abstract:
In one aspect, there is provided an injection molding system configured to operate in a plurality of cycles. The system comprises, amongst other things, a controller that is configured for performing a comparison of a variable pressure setpoint with a target pressure value. The controller is configured to, when the target pressure value is less than the variable pressure setpoint by at least a predetermined lower bound, (i) decrease the variable pressure setpoint to a reduced variable pressure setpoint and (ii) not further decrease the variable pressure setpoint from the reduced variable pressure setpoint until the pump assembly operates for a plurality of stabilizing cycles at the reduced variable pressure setpoint.
Abstract:
Disclosed is a hydraulic system for a molding system, the molding system having a clamp actuator and an injection actuator, the hydraulic system comprising a clamp accumulator for storing hydraulic fluid for use in actuating the clamp actuator; an injection accumulator for storing hydraulic fluid for use in actuating the injection actuator; a pump for conveying hydraulic fluid to the clamp accumulator and the injection accumulator; and a selector valve for selectively fluidly connecting the pump to one of the clamp accumulator and the injection accumulator.
Abstract:
A memory assembly (800), comprising: a storage media (802) tangibly embodying executable commands configured to direct a molding-system controller (114) to send a command signal to the first accumulator-control valve (106) and the first actuator control valve (110), the command signal configured to request: (i) the first accumulator-control valve (106) to permit flow of hydraulic fluid from the first accumulator assembly (108) to the first actuator assembly (112), and (ii) the first actuator control valve (110) to permit flow of hydraulic fluid from the first pump assembly (104) to the first actuator assembly (112) for the case where the molding-system controller (114) determines that the first actuator assembly (112) requires the flow from both the first pump assembly (104) and the first accumulator assembly (108) during a portion of a molding cycle.
Abstract:
An injection molding system configured to operate in a plurality of cycles includes, amongst other things, a controller that is configured for performing a comparison of a variable pressure setpoint with a target pressure value. The controller is configured to, when the target pressure value is less than the variable pressure setpoint by at least a predetermined lower bound, (i) decrease the variable pressure setpoint to a reduced variable pressure setpoint and (ii) not further decrease the variable pressure setpoint from the reduced variable pressure setpoint until the pump assembly operates for a plurality of stabilizing cycles at the reduced variable pressure setpoint.
Abstract:
In one aspect, there is provided an injection molding system configured to operate in a plurality of cycles. The system comprises, amongst other things, a controller that is configured for performing a comparison of a variable pressure setpoint with a target pressure value. The controller is configured to, when the target pressure value is less than the variable pressure setpoint by at least a predetermined lower bound, (i) decrease the variable pressure setpoint to a reduced variable pressure setpoint and (ii) not further decrease the variable pressure setpoint from the reduced variable pressure setpoint until the pump assembly operates for a plurality of stabilizing cycles at the reduced variable pressure setpoint.
Abstract:
In one aspect, there is provided an injection molding system configured to operate in a plurality of cycles. The system comprises, amongst other things, a controller that is configured for performing a comparison of a variable pressure setpoint with a target pressure value. The controller is configured to, when the target pressure value is less than the variable pressure setpoint by at least a predetermined lower bound, (i) decrease the variable pressure setpoint to a reduced variable pressure setpoint and (ii) not further decrease the variable pressure setpoint from the reduced variable pressure setpoint until the pump assembly operates for a plurality of stabilizing cycles at the reduced variable pressure setpoint.
Abstract:
A memory assembly (800), comprising: a storage media (802) tangibly embodying executable commands configured to direct a molding-system controller (114) to send a command signal to the first accumulator-control valve (106) and the first actuator control valve (110), the command signal configured to request: (i) the first accumulator-control valve (106) to permit flow of hydraulic fluid from the first accumulator assembly (108) to the first actuator assembly (112), and (ii) the first actuator control valve (110) to permit flow of hydraulic fluid from the first pump assembly (104) to the first actuator assembly (112) for the case where the molding-system controller (114) determines that the first actuator assembly (112) requires the flow from both the first pump assembly (104) and the first accumulator assembly (108) during a portion of a molding cycle.
Abstract:
In one aspect, there is provided an injection molding system configured to operate in a plurality of cycles. The system comprises, amongst other things, a controller that is configured for performing a comparison of a variable pressure setpoint with a target pressure value. The controller is configured to, when the target pressure value is less than the variable pressure setpoint by at least a predetermined lower bound, (i) decrease the variable pressure setpoint to a reduced variable pressure setpoint and (ii) not further decrease the variable pressure setpoint from the reduced variable pressure setpoint until the pump assembly operates for a plurality of stabilizing cycles at the reduced variable pressure setpoint.