◆Technological process of roving frame
◆According to the mechanism and function of the roving frame, the whole frame can be divided into five parts: feeding, drafting, twisting, winding and forming. In addition, in order to ensure the output and quality of products, the roving frame is also equipped with some auxiliary mechanisms.
◆The following figure shows the technological process of the roving machine. Ripped sliver 2 is led out of the sliver barrel 1, and is actively conveyed by the guide roller 3 to the drafting device 4. After being drawn to the specified fineness by the drafting device, it is output by the front roller, twisted by the spindle wing 6 to form the roving, and led to the bobbin.
◆Spindle wing 6 rotates with spindle 7. Once the spindle rotates, the spindle wing adds a twist to the yarn.
◆The bobbin is driven by the lifting rib 9. Due to the rotation speed difference between the spindle wing and the bobbin, the roving is wound on the bobbin through the pressing palm 8.
◆The ascending and descending stringer (lower stringer) moves up and down with the bobbin, thus realizing the axial winding of roving on the bobbin.
◆By controlling the lifting speed and lifting range of the rib, the roving tube yarn with truncated cone ends can be made.
