Description is done to principle, process of compounding spinning of spandex covering yarn and mechanical construction of the feeding device for the spandex core yarn as well as specifications in contrast to the conventional feeding process regarding the disadvantage.

9R-40 type in the machine in detail based on the design and installation of two kinds of feeding devices, Selected through the theoretical calculation of the radial roller cutter with feeding devices and the axial feeding device, And then proceed to the performance of the prototype test.

The paper adds an feeding device basing on the original engine by the analysis of 9R-40 rubber,though the reasonable analysis and determination the structure of the main working parts of rubber,selection and calculation the work parameters,provides the reference for the latter experiment.