The manufacturing process of coil nails

The manufacturing process of coil rivets typically includes the following main steps: material preparation, rust removal, rivet making, and coiling in a rivet making machine.

Rivet making is the core process, usually using a high-speed rivet making machine. The rivet tip is shaped by shearing or extrusion, while the rivet head is shaped by impact. For rivets requiring increased grip strength, such as threaded or ring-knot rivets, a special "thread rolling" process is performed, where the machine applies strong pressure to create the texture on the rivet body.

To ensure continuous use with a nail gun, the rivets need to be arranged and connected. First, the scattered rivets are transferred to a large turntable with gaps. Utilizing the characteristic that one end of the rivet is larger than the other, the rivets are aligned so that the tips face down and the rivet heads are held in place, achieving a uniform orientation. Next, the rivets are fed into a large disc with fixed positions to ensure a fixed spacing between them. Finally, at the exit of the disc, connectors (such as plastic strips or copper-plated wire) are used to glue or string the arranged rivets together to form a continuous rivet strip.

Modern coil nail production relies heavily on automation to improve efficiency. For example, the YH-GSJ-GS2600 high-speed coil nailing machine from Yancheng Yanhuang Automation Equipment Co., Ltd. can produce approximately 2500 nails per minute, suitable for wire diameters of 1.8-4mm. In addition, imported equipment such as the Danish ENKOTEC fully automatic nailing machine is also used for high-efficiency production.

To improve production efficiency and product quality, related patented technologies have emerged in the industry. For instance, Qingdao Shenghengtong Metal Products Co., Ltd. has obtained a patent for "A Quick Coil Changing Fixture for a Coil Nail Machine" (authorization announcement number CN223935052U). This fixture uses a limiting and packaging component to pack the coil nails and a filter box to handle debris, aiming to improve coil changing efficiency and ensure product cleanliness.