纱线自动接头机关键技术

Key technology for yarn automatic splicer

现有的针织车间接头装置只适用于部分纱线,无法对通用纱线进行接头以及很难在纱架上进行在线接头,为模拟人工打结的工艺流程,设计了一种由负压吸线机构、压线机构、张紧机构、机械打结机构和挑线机构等组成的小型机械式接头机。一方面对其打结机构和挑线机构的机构组成及运动原理进行分析;另一方面对其打结方式及过程进行仿真分析,同时研制样机进行实验测试。结果表明:该机械式接头机能够利用打结机构与挑线机构之间的相互配合,模拟人工打结方式将2根纱线吸取、并拢后完成接头,打结成功率高于99%,具备结构小巧、纱线适用类型广等优点,具有较高的实际推广应用价值。

The existing splicing devices in knitting workshops are only applicable to some limited yarn types and it is difficult to splice automatically on the yarn frame. This research simulated the manual knotting process and designed a small mechanical splicer consisting of negative pressure thread suction, thread pressing, tensioning, mechanical knotting and thread picking mechanism. In parallel to the analysis of construction and motion principle of the knotting and thread picking mechanisms, the knotting method and process were simulated and analyzed, leading to the development of a prototype for experimental testing. The experimental results show that the mechanical splicer can simulate the manual knotting by using the interplay between the knotting mechanism and the thread picking mechanism to draw and join two yarns together, and the success rate of knotting is higher than 99%, and it is structurally compact and applicable for wide range yarn types.