Specular seat manufacturing device and injection molding method using same

The invention relates to a device used for manufacturing microscope stand of lens module which comprises a male mould plate, a male mould core, a female mould plate, a female mould core, a tooth, a motor, a rotational speed sensor and a control device, wherein the male mould core is arranged inside the male mould plate; the female mould core is arranged inside the female mould plate; the male mould core and the female mould core are matched to form a mould cavity; the tooth is inserted into the male mould plate and the female mould plate; the tooth is provided with a first end and a second end which are relative; the first end has a screw thread structure; the motor is connected with the second end of the tooth; the motor is used for driving the tooth to enter or recede the mould cavity; the rotational speed sensor is connected with the motor and is used for sensing the rotational speed of the motor; the rotational speed sensor is in electric connection with the control device and inputs the sensed rotational