What is the production process of drywall screws? It is […]
What is the production process of drywall screws? It is to smelt the wire into dry wall screws step by step. Does the production process directly determine the quality of drywall screws? Let's discuss it?
There are a total of production processes: heat treatment, quenching, annealing, tempering and other steps
Heat treatment: It is a method of heating steel to different temperatures and then using different cooling methods to achieve different purposes of changing steel properties. There are three commonly used heat treatments: quenching, annealing, and tempering. What effect will each of these three methods produce?
Quenching: a heat treatment method that heats the steel to above 942 degrees Celsius to make the steel crystals appear austenite, and then immerses them in cold water or cooling oil to quench the steel crystals to the martensite state. This method can increase the strength and hardness of the steel. There is a very big difference between the strength and hardness of the steel with the same mark after quenching and without quenching.
Annealing: the same heat treatment method of heating the steel to austenite state and then performing natural cooling in the air. This method can reduce the strength and hardness of the steel and increase its flexibility for easy processing. Generally, steel will go through this step before processing.
Tempering: Whether it is quenched, annealed or pressure-processed steel, internal stress will be generated. The imbalance of internal stress will affect the steel structure and mechanical properties from the inside, so a tempering process is required. Insulate the material continuously at a temperature of more than 700 degrees, change its internal stress and then cool naturally.
The biggest feature of the dry wall screw is the shape of the trumpet head. It is divided into double-line fine-teeth dry wall screws and single-line coarse-teeth dry wall screws. The biggest difference between the two is that the thread of the former is double thread, suitable for gypsum board and the thickness will not exceed 0.8mm The connection between metal keels, and the latter is suitable for the connection of gypsum board and wooden keels.
In fact, the appearance of the two is also very distinguishable, that is, whether the thread is two threads to the tip or one thread to the tip, their functions are also different. The biggest difference is that the thread of the former is a double thread, which is suitable for plaster The connection between the board and the metal keel with a thickness of no more than 0.8 mm, and the latter is a single-thread thick thread with a wider thread, and the corresponding attack speed is faster. It is suitable for the connection between gypsum board and wooden keel, so that the wood itself will not be damage. Then Shanghai will provide consumers with detailed double-line fine teeth this tool. Now, many hardware manufacturers have derived a variety of dry wall nails that can be customized according to different consumer needs or uses.
Double-line fine teeth are the most basic products and the most widely used by consumers. The main thing for double-line fine teeth is phosphating and galvanized drywall screws, and galvanized drywall screws are only a supplement. Black phosphorus has a certain lubricity, and the attack speed is slightly faster; while the galvanized blue and white have a higher anti-rust effect than black phosphorus, and the product is lighter in color and easier to paint. Galvanized is divided into blue white zinc and yellow zinc. These two uses, uses, and rust prevention effects are almost the same, just look at the habits and preferences of consumers.