Plastic sheet sponge attaching, punching and screening device

The invention relates to the technical field of vehicle-mounted microphone production, in particular to a plastic sheet sponge attaching, punching and screening device. The plastic sheet machining device comprises a machining table, a conveying mechanism is arranged on the upper surface of the machining table and used for conveying plastic sheets, a bearing mechanism is arranged on one side of the conveying mechanism, and when the plastic sheets leave the conveying mechanism, the bearing mechanism bears the plastic sheets. After a sponge mat is placed on a plastic sheet, a piston rod of a second air cylinder drives a second electric telescopic rod to move to the position over the sponge mat, then the second electric telescopic rod extends to press the sponge mat downwards, and the sponge mat can be firmly attached to the plastic sheet; a piston rod of a second air cylinder drives a second electric telescopic rod to move to the position over a rotating plate, the second electric telescopic rod extends to drive