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How to choose a needle for sewing equipment

How to choose a needle for sewing equipment

In general, useSewing equipmentWhen sewing thin, brittle, and dense fabrics, you should choose a small needle; on the contrary, you should choose a large needle when sewing thick, flexible, soft, and sparse fabrics. If the needle is not selected properly, it will cause a series of problems. For example, when the sewing machine uses thick needles to sew thin materials, the friction between the needle and the sewing material is relatively large. When the needle rises, The sewing material will randomly rise in the presser foot groove, thereby delaying the formation of the loop and causing skipped stitches; and if thin needles are used when sewing thick materials, the needles will bend or break.

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During the high-speed sewing process of the sewing machine, the severe friction between the needle and the sewing material will cause the temperature of the unit to rise rapidly, and in severe cases, it will cause the chemical fiber fabric to form a melt hole or cause the chemical fiber suture to melt. In addition, the resistance of the needle hole through the thread will increase, and the forming conditions of the upper thread will be deteriorated, resulting in the phenomenon of stitch skipping or thread breakage in the sewing equipment. Therefore, the needles should be specially selected and cooled.

When sewing low-melting chemical fiber fabrics with sewing equipment at high speed, in order to avoid excessively high needle temperature, double-cut needles or high-speed needles can be used. Because the upper end of the double-cut needle is thicker, it can increase the stiffness of the needle, and the lower end can reduce the friction between the needle and the sewing material, thereby reducing the needle temperature. The size of the needle tip and both sides of the needle hole of the high-speed machine needle is 5% to 7% larger than the diameter of the needle bar, which can reduce the friction heat between the needle bar of the sewing machine and the sewing material. In addition, adding silicone oil to the suture and air cooling can also effectively reduce the needle temperature. Silicone oil is colorless, transparent and volatile. When sewing at high speed, it can absorb part of the heat of the needle.

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