Product appearance inspection of high-speed knitting machine.
Visual inspection is carried out, and the inspection items are mainly based on product specifications such as smooth and glossy surface, uniform gloss, no eccentricity, no mechanical damage, no bias, no visible dirt, bubbles, and sand holes, Obvious particulate matter, round bamboo shape, hemp flower, etc. The electrical conductor and the insulator or the sheath and the insulator are not allowed to stick together, the braiding layer should be uniform, and there should be no obvious problems such as yarn leakage, yarn running, and yarn breaking. It is stipulated that there should be no air oxidation on the conductor, and there should be no tin leakage or tin lumps on the tinned conductor.
The inspection of high-speed knitting machine specifications and knitting parameters includes.
High-speed braiding machine diameter, thickness, pitch, and commodity weaving density. There are two ways to measure the weaving density of the product, 1: measurement method: 1, the diameter D before weaving is measured with a vernier caliper. 2. The measurement of the weaving pitch h is measured by the paper tape method. 3 Half of the number of spindles of the braiding machine is used as the number of strands in one pitch. 4 The number of wires on each ingot n5 The diameter d of the iron wire is measured with a vernier caliper. 6 Calculation of braiding angle а=arctg(h(3.14(D+t)))t—weaving thickness, and metal wire t is a single diameter. 7 Calculate the unilateral coverage of the braided layer p=and/(hcosa8) Calculate the total penetration rate of the braided layer P=(2p-p2)*100(%) 2. Weighing method: the net weight of the braided layer and Comparison of the net weight of pipes of the same diameter made of the same wire.
Ways to clear the causes of high-speed knitting machine product quality problems.
- The weaving density does not meet the requirements, the number of spindles, the number and diameter of each spindle, the weaving pitch, and the weaving angle should be in harmony with each other.
- The density of the braiding layer is uneven, and the supporting torsion spring should be carefully adjusted to keep it relatively uniform and moderate, so as to achieve the purpose of uniform braiding density.
- If the weaving pitch is not uniform, you should first check whether the number of turns of the cable on the traction pulley meets the requirements, because when the number of turns is small, the cable is easy to roll, and if the number of turns of the cable on the traction pulley is increased appropriately Increase the frictional resistance to prevent the wire from rolling to achieve a uniform weaving pitch. Again, it should be checked whether the spindle rotation speed and the belt speed are matched smoothly.