The utility model relates to a doubling device which comprises a supporting shell, a doubling
assembly is connected to the supporting shell, a
control table is connected to one side of the supporting shell, a winding drum is installed in the doubling
assembly, a rotating device is connected to the front face of the supporting shell, an adjusting device is connected to the supporting shell, and the rotating device comprises a bottom plate. And the bottom plate is connected with a connecting plate. After the
adhesive tape is rotated to a proper position, the
adhesive tape is adhered to the outside of the
yarn and the winding drum from the inside of the
adhesive box, then the grabbing disc is rotated, the
rotating disc drives the rotating shaft to rotate, the rotating shaft rotates through the first bearing, then the rotating shaft drives the winding drum to rotate, and the winding drum drives the fixing rod to rotate through the second bearing at the moment; and the tension of the
yarn can be adjusted through the
handle, the situation that the pre-winding quality is affected due to the fact that the
yarn is too tight or too fed is avoided, the process is easy in the winding process, and the situation that the yarn is too tired after being wound for multiple circles is avoided.