small plastic tubes Common plastic bobbin procurement points

Common plastic bobbin procurement points: 1, the Ministry of Textiles bobbin according to the original standard which states: In the case of 18,000 rpm, the upper beats <20 silk, Central <18 wire, the lower <15 wire; otherwise it is unqualified; trial tablets may not have hemp hand, the phenomenon may small plastic tubes‍ not have shook his head. 2, the choice of a higher impact strength and toughness of ABS or PC material. ABS and PP. PP bobbin material ABS material prices compared to the end, some of the light weight. 3 ABS longer life, the bobbin must be homogeneous if the fine material itself bobbin directional centrifugal force will cause uneven, resulting jump tube. 4, core and spindle combination careful, directly related to the gripping force of the bobbin and spindle. Determine whether the primary unity aluminum jars‍ unity based on each bobbin spindles. How to distinguish it apart from the selected material bobbin burning identification method can also be dropped from a height of 50cm around the bobbin down (hard floors, such as concrete, ceramic transfer), if it is PP, the sound is muffled, and ABS dropped on the ground is very crisp sound. On the surface, ABS material bobbin brightness higher than the PP material. Note that the inside of the bobbin bobbin purchasing absence shrinkage hole bottom, because the wall thickness cosmetic jars and bottles‍ is thick, there will be some shrinkage of the inner bottom of the trace, but if too much shrinkage is substandard products. Because some manufacturers do not have the sense of quality, production speed will adjust the time quickly, and after the injection mold random stacking will cause bobbin deformation, bending. Especially material bobbin, if bent too large is inappropriate products.