Steel Wire for Household Sewing Machine Needle
Household sewing machines are commonly used tools for tailoring, mending and repairing of clothing, and the quality of the production materials and components is directly related to the quality of the sewing produced. The needle of the household sewing machine is one of the most important components of the sewing machine and it is directly related to the quality of the stitch. The steel wire is one of the main materials of the needle,its quality directly affects the strength, sharpness and flexibility of the needle.
The national standard YB/T 5187-1993 Steel Wire for Household Sewing Machine Needle issued in 1993 is suitable for the use of the steel wire for household sewing machine needle. The national standard stipulates requirements for quality, performance and delivery items for steel wire for household sewing machine needle.
The national standard of YB/T5187-1993 Steel Wire for Household Sewing Machine Needle is applicable to all types of household sewing machine needle, including straight needle, cross needle, needle for circular knit machine, etc. The purpose of this standard is to provide the basic requirements for the classification, inspection, performance and application environment of steel wire for household sewing machine needle.
The national standard YB/T5187-1993 Steel Wire for Household Sewing Machine Needle states that the raw material of the needle of the household sewing machine must be annealed, cast and rolled steel wire. The annealing is carried out at 700~800℃ and the surface of the steel wire should be smooth, without delamination and decarburization. The performance of the finished product should meet the requirements of the national standard, including tensile strength, stiffness, torsional strength and yield strength.
In order to ensure the quality of the steel wire used for household sewing machine needles, each batch must be inspected. Different inspections are carried out according to the performance requirements of the standard, including chemical composition test, tensile strength test, bending test, torsional strength test and corrosion resistance test. All steel wire for household sewing machine needle that does not meet the requirements of the national standard must be scrapped.
Steel wire for household sewing machine needle is a materials used for manufacture of needle for household sewing machines, the quality of the steel wire is the premise to ensure the quality of the product. The standard YB/T5187-1993 Steel Wire for Household Sewing Machine Needle provides basic requirements for the classification, inspection, performance and application environment of steel wire for household sewing machine needle, providing important technical parameters for the choice of suppliers and the purchase of raw materials.
