The refrigerator door panel, as an important part of the sealing system, the forming of the corner area has always been a difficulty in the industry.
Common problems:
Due to excessive stretching, the corner area is prone to wrinkling or cracking;
After the edge forming, if the size is slightly off, it will cause the door seal to not be tightly pressed, affecting the sealing;
The traditional roller corner treatment is not uniform, and over time, the door panel will also show slight warping.
Solution:
Add local stretching compensation passes at the corner to make the metal flow more evenly;
The mold adopts a variable segmented design, which can be adjusted quickly according to different thicknesses of the door panel;
After the forming is completed, an online sealing detection device is equipped to avoid defective products entering the subsequent assembly process.
What refrigerator manufacturers are most concerned about is not how fast the equipment runs, but whether the door panel can pass the airtightness test once after being installed on the entire machine.