The material we use for screw production is carbon steel c1022a, the wire needs to be drawn before use, and the hardness of the wire is reduced and the hard force is eliminated through the annealing process for later processing.

The cold heading is the first step in screw production of screw factory. For large quantity screw making, we use an advanced high-speed cold heading machine, which capacity is 240pcs/min. Different head types can be made with different models.

Thread rolling is the second step of screw production, also important during the screw production. Different thread type can be used for different materials, like metal to wood, metal to metal, wood to wood etc.

Drilling cutting machine is used for self drilling screw making to cut the drill point. As screw factories, we offer different screw drill to offer the best solution for our clients.

Heat treatment is to strengthen screws in order to avoid any broken during the screw drilling.

The final step of screw production is surface treatment, like zinc plated, phosphate, nickle, ruspert to make sure the screw is anti-corrosion and anti-rusting.

SCREW COLD HEADING

Whether it is construction, bridge repair or industry, screws are definitely widely used. And the cold heading is the first step in screw production of the screw factory. As a professional screw manufacture, we have used an advanced high-speed cold heading machine, which capacity is 240pcs/min. At the same time, we will also check and maintain the machine regularly to ensure the normal operation of the machine during the screw production. To be a screw factory, we can customize the mold according to the different needs of customers, so as to meet the different requirements of customers for the screw head shapes. We can make different screw heads, such as bugle head, hexagon head, countersunk head, wafer head. . . Different head drives can also be made, such as phillips drive, pozi drive, torx drive, square drive, combined drive. . .

SCREW DRILL CUTTING

Drill Cutting is an important step in the production of self drilling screws during screw manufacture. Our high-speed tail dilling machine can produce different screw tails. Such as type17 tail, cutting tail, winged drill tail. As for the drilling screw, we can also produce different types of tails according to the screw.

SCREW THREAD ROLLING

Thread rolling is another important process in screw production. Thread rolling is mainly used to form the thread of the screw. The principle of the thread rolling machine: the main motor drives, the machine runs, and the cam moves to form a pushing action. It can automatically complete the entire process of feeding, unloading and automatic thread rolling during screw production. As a screw manufacturing companies our thread rolling machine can be applied to different thread rolling plates, so as to meet the needs of customers for different thread shapes.

HEATING TREATMENT

The heat treatment of screws is also called hardening by screw manufacturing companies. If the iron steel needs to be harder, it needs to be hardened. Due to the different carbon content in low and medium carbon steels, the tempering temperature has different effects on them. The tempering temperature of the screws produced by the screw factory is generally around 360°C, and the tempering temperature of the drill tail screws is around 200°C, and then cooled to around 34°C-35°C and 39°C-40°C respectively.

SURFACE TREATMENT

There are many types of screw surface treatment, our common ones are galvanized, phosphating, nickel-plated, dacromet, ruspert and so on. Depending on the surface treatment method, different durations of salt spray tests can be carried out. We can provide customers with corresponding surface treatment according to their different requirements and uses.