Carton closing nails: production process and key control points

Carton closing nails are key components of carton packaging, and their quality directly affects the sealing and compressive strength of the carton. This article will discuss the production process and firmness evaluation method of carton closing nails, and look forward to their future development trends.
Carton closing nail production process

The production of carton closing nails usually includes the following steps:

1. Raw material preparation: The main raw material is wire rod, and the appropriate material and specification need to be selected according to product requirements. Commonly used materials include low carbon steel, medium carbon steel and stainless steel, etc. Closing nails of different materials have different strength, hardness and corrosion resistance.

2. Wire drawing: The wire rod is drawn to the target diameter and annealed to improve its mechanical properties. During the wire drawing process, parameters such as surface reduction rate, lubrication and annealing temperature need to be controlled to ensure the dimensional accuracy and mechanical properties of the steel wire.

3. Forming: The steel wire is processed into the shape of a closed nail using a nailing machine, including a nail cap, a nail rod and a nail tip. The mold accuracy and adjustment parameters of the nailing machine affect the dimensional accuracy and shape consistency of the closed nail.
4. Heat treatment: The formed closed nail is quenched and tempered to improve its hardness and strength. The heat treatment process needs to be optimized according to the material characteristics to obtain the best mechanical properties.
5. Surface treatment: Electroplating, painting and other surface treatments are carried out according to needs to improve rust resistance and aesthetics. Common surface treatment methods include galvanizing, nickel plating, chrome plating and painting.
6. Packaging: The finished closed nails are packaged in a certain quantity for easy transportation and storage.

Key control points:

Raw material quality: The composition, diameter and surface quality of the wire rod directly affect the performance of the closed nail. High-quality wire rods produced by regular manufacturers should be selected and strictly inspected before entering the factory.
Wire drawing process: Parameters such as surface reduction rate, lubrication and annealing temperature during the wire drawing process need to be strictly controlled to ensure the dimensional accuracy and mechanical properties of the steel wire.
Forming accuracy: The mold accuracy and adjustment parameters of the nailing machine affect the dimensional accuracy and shape consistency of the closed nail. The mold should be maintained and serviced regularly, and the adjustment parameters should be strictly controlled.
Heat treatment process: Parameters such as quenching temperature, time and cooling rate need to be optimized according to the material characteristics to obtain the best mechanical properties.
Surface treatment quality: The thickness, uniformity and adhesion of the electroplating layer need to meet the relevant standards. Reliable surface treatment manufacturers should be selected and strict quality inspections should be carried out.