Sewing needle metal detector for fabric garment shoes apparel textile industry

Sewing needle metal detector for fabric garment shoes apparel textile industry

Technical details:

Applied industries:
Garments, Fabrics, Apparels, Textiles, Cloths, Shoes, Suits, Trousers, Socks,etc.

Product function:
Identifying whether there are any undesirable metallic substances and broken needles left-over or embedded in the garment and accessories in manufacturing and sewing process.
Features:
1. 32 bit digital computer chipes with latest workmanship and technology
2.Auto shutdown energy saving mode after no detection for more than 10 minutes
3. 8 points positioning technology enabling to find out specific location of borken needles
4. Counting function for a better production management
5. Excellent anti-interference design with good detection stability
6. Printing function for production management

Principle 

The magnetic lines of force travel from the North pole to the South pole. When there is any magnetized substance passing through it, the magnetic field will get changed, which can trigger off the needle detector, causing it to sound the alarm.

Now let us move on to the factors that can cause the garments to fail the needle detection.

1.Manufacturing/Special Processes

The manufacturing of garments often involves various technologies and processes to convert the raw materials into the finished items that are wearable. Garments may not pass the needle detection due to the special treatment applied or post-treatment which has not been disposed of properly.

The needle detector will respond to:

• Metal powder that adheres to the garment fabrics during the manufacturing and sewing process
• Metallic debris that remains in the place where the sewing needle hits against the zipper
• Metal impurities that stick to the garments, resulting from such substances that accompany the special process like stone wash
• Certain chemical substances that stick to the fabrics or zippers in the washing process or other similar processes
• Certain dyestuffs

2.Needle Detectors

Most of the detectors are sensitive enough to ensure the detection accuracy. However, different types of detectors, inconsistent sensitivity of the detection unit as well as different positions or directions in which the needle passes through a detector will lead to a different sensitivity level and result in the differences in detection.

If the garments being checked are placed in the part that features extremely strong or weak sensitivity, or when the garments being inspected are not placed within the detecting area where they are supposed to be, the testing result will be inaccurate.

Additionally, when magnetic substances, stain or dust adhere to the conveyor belt, the detector will malfunction, resulting in false alarm and the inaccuracy in testing.