The advantages of the multi-link crank opening device for looms

The multi-link crank dobby mechanism is an important component of a loom. Compared to the common single crank dobby mechanism, it has the following advantages:

It significantly improves the surface texture of the fabric, making it fuller. The realization of slow opening allows for sufficient shuttle insertion time during high-speed weaving. The special opening curve ensures more uniform tension changes in the upper and lower warp yarns during opening, resulting in noticeable improvements in broken warp reduction even at high speeds. In contrast, ordinary crank dobby mechanisms, lacking these features, can only weave at lower speeds. Due to the matching of heald frame motion patterns with beating curves, even heavy fabrics can be woven with ease, whereas ordinary crank dobby mechanisms can only handle lightweight fabrics. By eliminating the complex cam opening device used in rotating mechanisms, equipment investment can be significantly reduced. The optimized crank components greatly enhance the high-speed adaptability and reliability of the mechanism compared to ordinary crank mechanisms, reducing machine material consumption during the weaving process. It is particularly suitable for long-term large orders of various plain and edge fabrics.