Needle is an important sewing machine parts, needle varieties are only hundreds of domestic. The nature of the machine determines the choice of needle, different nature of the machine to be equipped with different types of machine needle specifications, such as the use of sewing machine 96’1 or 88’1-type needle; overlock machine using l8’1-type machine Needle and so on. Regardless of which type of machine, sewing process should be based on the nature and thickness of sewing materials selected needle specifications that needle. In general, the needle for the textile and knitwear, the needle tip are ground into a conical, sewing leather and similar sewing materials are used when the special shape of the tip, such as spear tip, tip, anti-twist tip, etc., purpose Is to increase the needle strength, and achieved good sewing effect.
The selection criteria for the needle are as follows:
- In the case of considering the strength of the needle itself, as far as possible with smaller needle.
- Thick material of the puncture resistance, in order to prevent broken needle should choose a strong stability of the thicker needles, and coarse needle is not easy to stab the thicker staple fibers.
- Thin material of the puncture resistance is small, in order to prevent the sewing material appears needle hole, affect the appearance of sewing materials, choose a smaller needle.
- The needle should be smooth, non-sharp spikes rust, needle obtuse appropriate to prevent damage to the staple fiber.