INJECTION FOAM MOLDING MACHINE

摘要

An injection foam molding machine of the invention includes: a movable mold platen; a fixed mold platen; a mold fastening hydraulic cylinder that is provided at each of four corners of both mold platens; a tie bar that is driven by the hydraulic cylinder to fasten the molds; two sets of mold opening and closing actuators that drive the movable mold platen to move close to or away from the fixed mold platen; two sets of dedicated core back devices; and a control device that controls the two sets of mold opening and closing actuators and the two sets of dedicated core back devices, wherein the control device includes a dedicated core back program that simultaneously controls the two sets of mold opening and closing actuators and the two sets of dedicated core back devices during a foaming core back operation of moving the movable mold platen away from the fixed mold platen.

主权项

1. A method for controlling an actual thickness of a foamed and molded product formed by a core back operation in which a movable mold platen is moved away from a fixed platen using both of mold opening and closing actuators and core back devices which are connected to the movable platen, the method comprising:
operating each of the mold opening and closing actuators and the core back devices independently so that a position of each of shafts of the mold opening and closing actuators and the core back devices is set to a core back target completion position of each of the shafts, wherein the core back target completion position is preliminary determined for each of the shaft of the mold opening and closing actuators and the core back devices by: calculating or measuring at least one of a shape of the foamed and molded product, an opening speed of the movable platen, and a stop position of the movable platen; calculating a core back target stop reference position value and a stop position offset value for each of the shafts based on a result of the calculation or measurement; and obtaining the core back target completion position of each of the shafts by adding the stop position offset value to the core back target stop reference position value or subtracting the stop position offset value from the core back target stop reference position value.