Golf ball methods and molds for quickly and efficiently eliminating air/gas from within a mold while better centering a subassembly in the mold during golf ball manufacture and the improved golf balls resulting therefrom.

Golf ball methods and molds for quickly and efficiently eliminating air/gas from within a mold while better centering a subassembly in the mold during golf ball manufacture and the improved golf balls resulting therefrom.

An injection molding system comprising: a first selected valve, one or more downstream valves, delivering a fluid to a mold cavity, at least one fluid property sensor, each valve associated with a position sensor that detects opening of a gate at an actual open gate time to the controller, the controller automatically adjusting time of instruction to open the gates on a subsequent injection cycle by an adjustment time equal to any delay in time between a predetermined open gate target time and an actual open gate time, wherein the system forms a first one or more parts or objects, the user inspecting or measuring the first one or more parts or objects and manually adjusts the predetermined open gate target time.

An injection molding system comprising: a first selected valve, one or more downstream valves, delivering a fluid to a mold cavity, at least one fluid property sensor, each valve associated with a position sensor that detects opening of a gate at an actual open gate time to the controller, the controller automatically adjusting time of instruction to open the gates on a subsequent injection cycle by an adjustment time equal to any delay in time between a predetermined open gate target time and an actual open gate time, wherein the system forms a first one or more parts or objects, the user inspecting or measuring the first one or more parts or objects and manually adjusts the predetermined open gate target time.

An injection molding system comprising: a first selected valve, one or more downstream valves, delivering a fluid to a mold cavity, at least one fluid property sensor, each valve associated with a position sensor that detects opening of a gate at an actual open gate time to the controller, the controller automatically adjusting time of instruction to open the gates on a subsequent injection cycle by an adjustment time equal to any delay in time between a predetermined open gate target time and an actual open gate time, wherein the system forms a first one or more parts or objects, the user inspecting or measuring the first one or more parts or objects and manually adjusts the predetermined open gate target time.

An injection molding system comprising: a first selected valve, one or more downstream valves, delivering a fluid to a mold cavity, at least one fluid property sensor, each valve associated with a position sensor that detects opening of a gate at an actual open gate time to the controller, the controller automatically adjusting time of instruction to open the gates on a subsequent injection cycle by an adjustment time equal to any delay in time between a predetermined open gate target time and an actual open gate time, wherein the system forms a first one or more parts or objects, the user inspecting or measuring the first one or more parts or objects and manually adjusts the predetermined open gate target time.

An injector includes a nozzle provided with a valve seat, a valve body which is seated on or separated from the valve seat, and a displacement means for displacing the valve body. A resin flow passage through which molten resin flows is formed inside the nozzle. The resin flow passage includes a cross-sectional area varying portion having a cross-sectional area, in a direction orthogonal to a flow direction, which varies with increasing distance toward or away from the valve body. The displacement means is capable of stopping the valve body in any position in the cross-sectional area varying portion.

An injector includes a nozzle provided with a valve seat, a valve body which is seated on or separated from the valve seat, and a displacement means for displacing the valve body. A resin flow passage through which molten resin flows is formed inside the nozzle. The resin flow passage includes a cross-sectional area varying portion having a cross-sectional area, in a direction orthogonal to a flow direction, which varies with increasing distance toward or away from the valve body. The displacement means is capable of stopping the valve body in any position in the cross-sectional area varying portion.

An injection molding apparatus includes a first upstream mold having a first gate opening into which a first molding material flows, a second upstream mold having a second gate opening into which a second molding material flows, a first injection unit injecting the first material through the first gate opening, a second injection unit injecting the second material through the second gate opening, and a downstream mold clampable with each of the first and second upstream molds. The second material is injected by the second injection unit after the first material is injected by the first injection unit. The second gate opening is separated further from the downstream mold than the first gate opening, and a volume of a second cavity partitioned by the second upstream mold and the downstream mold is larger than that of a first cavity partitioned by the first upstream mold and the downstream mold.

An injection molding apparatus includes a first upstream mold having a first gate opening into which a first molding material flows, a second upstream mold having a second gate opening into which a second molding material flows, a first injection unit injecting the first material through the first gate opening, a second injection unit injecting the second material through the second gate opening, and a downstream mold clampable with each of the first and second upstream molds. The second material is injected by the second injection unit after the first material is injected by the first injection unit. The second gate opening is separated further from the downstream mold than the first gate opening, and a volume of a second cavity partitioned by the second upstream mold and the downstream mold is larger than that of a first cavity partitioned by the first upstream mold and the downstream mold.