The fore equipment of Chemical fiber two-for-one twister，fancy twisting machne and cover Yarn Machine make different typ化纤倍捻机、花式捻线机、包覆纱机的前道设备，把不同规格的原料筒子络绕成可在化张倍捻机、花式捻线机、包覆纱机上加工的双锥形、平行筒子，可提供一般原料的并丝功能。