Visual inspection of high-speed knitting machine:
Visual inspection is carried out, and the inspection items are mainly based on product standards such as smooth and glossy surface, uniform gloss, no eccentricity, no mechanical damage, no voltage bias, no visible dirt, bubbles, sand holes, obvious Particles, round bamboo shapes, cannabis flowers, 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 oxidation of the conductor, and the tin-plated conductor does not need to have tin leakage or tin bumps.
The inspection of product size and weaving parameters of high-speed knitting machine includes:
High-speed braiding machine diameter, thickness, pitch, and commodity weaving density. There are two main ways to measure the weaving density of commodities:
- Measurement calculation method:
- The diameter D before weaving is measured with a vernier caliper.
- The measurement of the weaving pitch h uses the paper tape method to measure the signature pen grinding.
- Half of the number of knitting machine spindles is used as the number of stocks in one pitch.
- The number of filaments per ingot n.
- The diameter d of the iron wire is measured with a vernier caliper.
- Calculate the braiding angle а=arctg(h(3.14*(D+t)))t— the braid is thin and thick, and the wire t is a single aperture.
- Calculation of unilateral cover of braid layer p=a*n*d/(h*cosa8) Calculate the total penetration rate of the braid layer P=(2p-p2)*100(%).
- Weighing method: the weight of the braided machine layer is compared with the weight of a pipe of the same diameter made of the same wire.
Ways to clear the types and causes of knitting machine quality problems:
- The weaving density does not match, the number of spindles, the number and diameter of each spindle, the weaving pitch, and the weaving angle should match each other.
- The density of the braiding layer is uneven, and the control force 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 uneven, you should first check whether the number of turns of the cable on the traction wheel meets the requirements, because the cable is easy to roll when the number of turns is small, and it is appropriate to increase the number of turns of the cable on the traction wheel to increase the frictional resistance to avoid The cable wires are rolled to achieve a uniform weaving pitch. Again, it should be checked whether the spindle rotation speed and the pulling speed are matched smoothly.