Husky Injection Molding Systems Limited

Daoshan Ouyang

Douglas James Weatherall

Zhiming Wang

William Harold Howlett

Mingyu Liu

There is disclosed a method () of ejecting a molded article () from an injection mold (). The method () comprises: during a second portion of the mold opening cycle of the injection mold (), the second portion occurring later in time relative to a first portion of the mold opening cycle of the injection mold (): controlling velocity of at least one of: (i) the moveable mold half () relative to the stationary mold half (), (ii) the ejector () relative to the moveable mold half (); and (iii) an ejector actuator linked to the core insert (); and (iv) a stripper actuator that is linked to the stripper sleeve (); the controlling executed such that the molded article () is ejected from the molding component with a substantially zero departure-velocity along the first axis of operation.

Molding apparatus and method of controlling same

A hydraulic system is provided, having a pump, operably connected to a motor. It also comprises a controller-driven hydraulic actuator, operably connected to the pump and a hydraulic valve, operable to direct hydraulic fluid to and from either a rod side or a cylinder side of the hydraulic actuator. Rod and cylinder side pressures are pre-defined based on the instantaneous acceleration or deceleration required. Decelerating the hydraulic actuator could involve maintaining the current pressure in the meter-out side of the hydraulic actuator and decreasing the current pressure in the meter-in side by varying the speed of the pump. Deceleration of the hydraulic actuator could also include decreasing pressure on the meter-in side of the hydraulic actuator at a higher rate than on the meter-out side. Acceleration is achieved using a similar approach.

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Bolton, Canada

Daoshan Ouyang