Automatic die closing actuator of disc injection molding machine

The utility model provides an automatic die closing actuator of a disc injection molding machine. The automatic die closing actuator comprises a die closing cylinder support, a die closing cylinder and a sensor; the die closing cylinder and the sensor are fixed on the die closing cylinder support; the die closing cylinder support is a double-layer support; the die closing cylinder is fixed at the upper layer of the die closing cylinder support; the sensor is fixed at the lower layer of the die closing cylinder support. The automatic die closing actuator of the disc injection molding machine has the advantages that the operating worker does not need to close the upper cover of the die after taking out workpieces, and instead, the die closing actuator is used for automatically carrying out the die closing operation; the automatic die closing actuator of the disc injection molding machine is simple in structure, low in cost, and meanwhile, capable of achieving the effects of emancipating the productive forces and improving the production efficiency.