Pneumatic nail guns, also known as pneumatic nailers, are nailing tools that use the air pressure generated by an air pump (air compressor) as a power source. Its working principle is that the high-pressure gas drives the striker in the nail gun cylinder to perform hammering motion, thereby effectively nailing the rows of nails in the nail clip into the object, or ejecting the rows of nails at high speed. The air pressure range of this type of nail gun is generally 4-6.5Kg/c㎡(Bar) for small guns, while large nail guns reach 5-8Kg/c㎡(Bar).
Exhaust structure and components
The working principle of the pneumatic nail gun can be analyzed in detail in the following steps. First, the gun body of the nail gun, including the gun body, cylinder, balance valve, switch assembly, striker assembly (gun tongue), buffer pad, gun mouth and gun groove and other key components, together constitute an efficient working system. When the compressed air has a difference with the atmospheric pressure, the trigger switch is triggered, causing the striker (piston) to reciprocate in the cylinder. On the other hand, the magazine assembly is responsible for storing and supplying rows of nails. It consists of a gun head, a gun cover, a fixed magazine, a movable magazine and other accessories. The elasticity of the compression spring or tension spring is used to send the row of nails into the groove of the gun cover. When the firing pin rushes out of the gun mouth at high speed, the row of nails is effectively nailed into the object or ejected at high speed. The air pressure range of this type of nail gun is usually 4-8Kg/c㎡(Bar), depending on the model and purpose of the nail gun.
The nailing power of the pneumatic nail gun comes from the compressed air generated by the air compressor, which is continuously input into the air storage chamber of the air nail gun through a hose. When the air nail gun is pulled, the trigger valve will close and a channel connected to the atmosphere will be opened. When the trigger valve is reset, the compressed air cannot flow into the space of the valve plug. Because the air pressure at the bottom of the valve plug is greater than that at the top, the valve plug rises, and the compressed air can flow to the top of the piston. This process pushes the piston and the blade downward, thereby ejecting straight nails, code nails or steel nails out of the gun barrel. During the downward movement of the piston, the air pushes the air in the piston into the return air chamber through a series of holes. As more air enters the gun chamber, the air pressure gradually increases. When the trigger is released, the compressed air pushes the valve plug back to its original position and prevents air from flowing into the piston head.
As the compressed air in the return air chamber loses the downward air pressure, the piston head rises under the pressure of the air. At this time, the air above the piston head is discharged into the atmosphere through the exhaust port of the air nail gun. When the pressure on the piston head is greater than that on the bottom, the piston is pushed downward. In layman's terms, the compressed air output by the air pump (air compressor) is transported to the air nail gun through the air pipe. In the air nail gun, the hand pressure switch controls the air pressure to enter the cylinder. The cylinder is equipped with a piston, and its head is the gun needle. When the trigger is pulled, the air pressure pushes the piston (gun needle) forward, thereby opening the nail groove and shooting out the straight nail or code nail. After releasing the hand, the return air work will reset the piston.
In addition, the structure of the code nail gun is also quite exquisite. It includes the gun body, cylinder and cylinder head, piston, fixed and movable magazines, gun head, balance valve, trigger, valve stem, positioning handle and air nozzle. The gun head is also covered with a safety frame to ensure safety during use. When the user pulls the trigger, the compressed air will be released immediately, pushing the rotor to rotate to the designed position. At this time, the front end of the rotor has a small area, which can generate enough instantaneous force to drive the nail into the wood strip. This design cleverly uses the principle of instantaneous force, making the nailing process both efficient and safe.
