There are more and more families using Stainless Steel Sink . As far as the sink market is concerned, there are three types of integral stamping (also called integral stretching or joint stretching), seam welding (also called bottom welding) and butt welding. Both seam welding and butt welding belong to the welding basin.
Most of the more common in the market is the roll welding process. This process mainly stretches two single-slot tanks, and then presses a panel to weld the two tanks to the panel and then grinds them. In the process, the requirements for the tank stretching equipment are low, and the hydraulic equipment of 500 tons or less is generally produced. However, the welding and grinding process requirements are relatively high. Generally, domestic brands usually use manual seam welding, manual grinding, and the joint between the tank and the panel is rough, and there is often a virtual weld. The imported brands use CNC welding and CNC grinding to eliminate the virtual welding, and the seams after grinding are very smooth and beautiful.
The advantages of the seam welding process are as follows: the shape of the sink panel can be diversified, and the input cost of the factory production mold is small (the tank mold can be shared). The sink panel can be drawn raw material or embossed material, which is beautiful and generous. It can make a trough with a small R angle, close to the square, and have more space for use.
The disadvantages of seam welding are as follows: the welding process is harmful to stainless steel sink, and it is easy to break the austenitic molecular structure of stainless steel sink and reduce corrosion resistance. Welding and grinding process requirements are high, ordinary equipment is difficult to compete. Material waste is high and cost is high.
The overall stretching process (some is also called integral stretching) is a process of directly stretching a two-slot body by a combined mold on a piece of material. The process steps are relatively simple, but the requirements for equipment and molds are high, and the stretching equipment needs to be more than 600 tons or even 1000 tons. Whether it is a single tank or a double tank, the stretching during processing is generally divided into two stretchings, but the overall stretching requires a high temperature solution treatment in the middle of the two stretching.
