Spinning module three roll traction machine

In wet spinning machines,Spinning module three roll traction machineIt is a key device, whose main functions include the following aspects:

1. Control the stretching and orientation of fibers

• After the fibers are initially formed from the coagulation bath, the traction machine applies controllable tension to stretch the fibers (known asdrafting）. This process can:

• Adjust the diameter of fibersBy stretching, the fibers are made thinner to achieve the desired specifications.

• Improve molecular chain orientationStretching arranges polymer molecules along the fiber axis, thereby enhancing the mechanical properties of the fiber, such as strength and modulus.

• Improve crystal structureSome materials will form a more regular crystal structure during stretching, which affects the performance of the final fiber.

2. Maintain continuous production

• Transmission fiberThe tractor continuously extracts the wet fibers that have initially formed in the coagulation bath to avoid fiber accumulation or adhesion in the coagulation bath.

• Coordinate production paceBy adjusting the traction speed to match the extrusion speed of the spinneret and the residence time of the coagulation bath, the continuity and stability of the production line are ensured.

3. Regulating the physical state of fibers

• Control the moisture content of fibersDuring the traction process, the fibers may undergo processes such as washing and pre drying. The traction machine helps the fibers maintain appropriate tension to prevent excessive shrinkage or deformation.

• Reduce defectsStable traction can avoid problems such as fiber breakage and fuzz caused by uneven local stress.

4. Provide a foundation for subsequent processes

• The pulled fibers usually undergo subsequent processing steps such as drying, heat setting, and winding. The tractor ensures that the fibers enter these processes with uniform tension and a flat state, ensuring the quality of the finished product.

Key parameters and design considerations

• traction speed: It needs to be accurately matched with the extrusion rate of the spinning solution and the reaction rate of the coagulation bath to prevent excessive stretching (fiber breakage) or insufficient stretching (fiber coarseness).

• Roller materialCorrosion resistance (due to contact with chemicals in the coagulation bath) and anti sticking (to avoid wet fiber adhesion) are required.

• tension controlMulti roller design can adjust tension in sections to adapt to different fiber states in different process stages.

Sample Application

• inviscose fiberIn the production of artificial silk, tractors help regulate the fiber's fineness and strength.

• inCarbon fiber precursorIn the preparation of polyacrylonitrile based materials, the stretching ratio of the tractor directly affects the orientation of the raw fibers, which in turn affects the performance after carbonization.

In short,Spinning module three roll traction machineThrough precise mechanical control and transmission functions, it plays a key role in connecting forming and post-treatment, and regulating fiber structure in wet spinning, directly affecting the performance and production stability of the final product.