Knitting machine product appearance inspection: Observe […]
Knitting machine product appearance inspection:
Observed by eyesight, the inspection items are mainly based on product standards such as smooth and round surface, uniform gloss, no eccentricity, no mechanical damage, no pressure deviation, no visible objects, bubbles, sand holes, significant particles, bamboo shape , twists, etc. The conductor and the insulator or the sheath and the insulator are not allowed to adhere, the braid layer should be uniform, and there should be no obvious problems such as yarn leakage, running yarn, yarn breakage and the like. There should be no oxidation of the conductors, and the tin-plated conductor should not have any leakage of tin or tin.
Inspection of the size and weaving parameters of the knitting machine includes:
Weaving machine product outer diameter, thickness, pitch, product weaving density. There are two methods for measuring the weaving density of the product. 1: Measurement calculation method: 1. The measurement of the outer diameter D before weaving is measured with a micrometer. 2 Measurement of the knitting pitch h The pencil grinding method was measured by a paper tape method. 3 The half of the number of spindles of the knitting machine is taken as the number of strands in one pitch. 4 Number of filaments per ingot n 5 The diameter d of the wire is measured with a micrometer. 6 Calculate the braid angle а=arctg(h(3.14*(D+t))) t—weave thickness, and the wire t is a single diameter. 7 Calculate the unidirectional coverage of the braid layer p=a*n*d/(h*cosa 8) Calculate the total coverage of the braid layer P=(2p-p2)*100(%) 2. Weighing method: the weight of the braided layer Comparison of the weight of a tube of the same diameter composed of the same wire.
The method for eliminating the type of knitting machine quality problem:
1: The weaving density does not meet the requirements, the number of spindles, the number of roots and the diameter of each spindle, and the weaving pitch and the weaving angle should be coordinated with each other.
2 The density of the braided layer is not uniform, and the tension spring should be carefully adjusted to maintain a relatively uniform and appropriate shape to achieve uniform braiding density.
3 The weaving pitch is not uniform. First check whether the number of turns of the cable on the traction wheel meets the requirements. Because the number of turns is small, the cable is easy to slide. The cable is slipped in the traction wheel to increase the friction coefficient to prevent the cable slip. Achieve a uniform weave pitch. It should be checked again whether the spindle rotation speed and the traction line speed are stably matched.