Ordinary steel needles are the main ones. When the setting machine is opened to about 60 steps per hour, and the temperature of the oven is added, the metal bottom plate thermally expands and contracts, and the needle plate will fall off, break, and rust, which will seriously affect the service life of the setting machine. Productivity. Now that there are more and more manufacturers, the quality of needle plates has become uneven. When we buy, we can’t tell which needle plate is suitable for the machine. The cloth that a good needle plate can make is smooth and non-snagging. It does not need to be replaced frequently and the needle plate is broken, and it has a long life. It can be judged by the following methods.
1.
Other standards for bottom plate processing : The hole distance between each needle has a large error, and sometimes it can be seen that the entire row of needles is not in a straight line. Lixinlong's standard: the hole distance between each needle does not exceed 0.05mm, Each row of needles are arranged in a straight line. Benefits: beautiful and maintain uniform tension.
2.
Other standards for punching processing : the interference fit between each hole and the steel needle is uneven, and the surface looks like constant needles, but the steel needle has been damaged during the stamping process. Due to the internal stress characteristics of the metal material, it will As a result, the life of the needle plate is greatly reduced. The fit between each hole and the steel needle is 0.06mm. When a 15T punch is used for one-time leveling, there will be no changes in the internal stress of the steel needle and the service life of the needle plate is guaranteed. Benefits: prolong the service life.
3.
Other standards for bottom plate electroplating : the environmental protection requirements of electroplating are not up to standard. Most of them are electroplating in small workshops, and the brightness is not enough. After a long time, the plating layer will fall off and become black.
4. Other standards of steel needle specifications
: the heat treatment process is not up to standard, and the needle is easy to break during logistics and express transportation, and the temperature changes when passing through the oven. The heat treatment process is up to standard. Except for the destructive test, the needle is not easy to break. From the comparison of these aspects, you can more accurately understand the workmanship of the needle plate. The needle plate of the sizing machine can also electroplate the steel needle according to the application requirements. Chrome plating (bright silver), or imported German 9042# stainless steel needle can be used to deal with the working environment of strong acid and alkali.
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