A rotary core includes an undercut portion molding section for molding an undercut portion in a resin-molded article, and a seal portion abutting on a mold main body. In a side view viewed from a direction orthogonal to the direction in which a shaft member serving as the rotation center of the rotary core extends, a first imaginary line extending along the inner edge of the seal portion, and a second imaginary line extending from the rotation center to the first imaginary line and orthogonal to the first imaginary line are drawn. The seal portion includes a portion that is located on a lower side of the second imaginary line and is bent inward in the width direction as compared with a portion of the seal portion that is located on an upper side of the second imaginary line.

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 that detects a flow front of fluid material flowing downstream through the mold cavity at a trigger location within the cavity disposed between the first gate and at least one selected downstream gate, a controller instructing an actuator associated with the downstream gates to open the gates at a predetermined open gate target time on a first injection cycle, 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 the predetermined open gate target time and the actual open gate time.

In the present invention, constructed is a highly reliable system that does not allow unforeseen conditions to occur in the remote diagnosis of a clamp device. All combinations of status of a state detection switch mounted on a clamp device are anticipated in advance by a recursive method, and the states are defined with no omissions. A control unit 9 includes: a main body memory 9c that stores the ON/OFF state of a state switch together with the status of an injection molding machine main body, the clamp status and time information; and a main body communication unit 9d which is capable of short-range wireless communication. A message diagnosing a failure is stored in a smartphone 12 for all combinations of the ON/OFF state of the state detection switch for each of the following cases: whether in mold replacement mode or not; and whether a clamp device is in a clamped state or an unclamped state, or in a state other than the forgoing. The history of the ON/OFF state of the state detection switch with respect to the status of the main body and the clamp status is read from the main body memory 9c by wireless communication, and a corresponding message is displayed.

According to one embodiment, an operating state management device includes a first memory, a processor, and a second memory. The first memory is configured to store, in each of a plurality of operating state management target devices, feature patterns of detection states of a plurality of sensors that detect states of individual components in association with operating states. The processor is configured to compare patterns corresponding to actual detection states of the plurality of sensors with the feature patterns stored in the first memory, and determine operating states. The second memory is configured to store the determined operating states in time series.

A resin detection system for closing an automated valve to prevent resin entering a vacuum line portion of an outlet line is described. The resin detection system comprises a support (300) to a pneumatically-actuated device (320), a capacitive sensor (380) and a valve (410) are mounted. The sensor is configured to provide at least one signal indicative of the presence of resin in the outlet line which is used to close the valve automatically once the presence of resin is sensed by the capacitive sensor. The resin detection system forms part of an injection moulding apparatus and receives signals from a processor thereof to ensure that, if too much resin is injected, the valve is automatically closed even in the event that the sensor does not detect the presence of resin in the outlet line.

In the present invention, sealing tape is wrapped around the outer circumferential surface of an introduced mold, and a monomer solution is injected into a cavity formed therein, wherein the injection amount of the monomer solution can be precisely controlled by using a vision recognition system. According to a preferable embodiment, a monomer solution of a monomer solution tank is suctioned, in advance, into a syringe capable of adjusting a capacity corresponding to a mold; most of the monomer solution, which has been injected into the syringe, is firstly injected into the mold at a high injection flow rate or injection speed; while the residual amount of the monomer solution is secondly injected at a reduced injection flow rate or injection speed, it is finally confirmed, by using a vision recognition system, whether the monomer solution is filled in the mold; and then injection is finished.

An injection molding hot runner system adapted for leak detection during injection molding includes a manifold and a housing surrounding the manifold, wherein the manifold and the housing are spaced apart defining one or more pockets, the manifold comprises at least one junction point establishing a connection to a component attached to the manifold, wherein at the at least one junction point a sensor is located in the pocket, wherein the sensor is configured to indicate a leak when getting in contact with the molten plastic due to a leak at the junction point.

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 that detects a flow front of fluid material flowing downstream through the mold cavity at a trigger location within the cavity disposed between the first gate and at least one selected downstream gate, a controller instructing an actuator associated with the downstream gates to open the gates at a predetermined open gate target time on a first injection cycle, 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 the predetermined open gate target time and the actual open gate time.

A drive mechanism for an injection molding machine that causes a movable object to undergo movement includes a driving motor that generates a driving force, a drive pulley connected to the driving motor, a driven pulley connected to the movable object, and a plurality of belts (a wide belt and a narrow belt) of equal length, the belts being arranged in parallel with each other and trained around the drive pulley and the driven pulley.