1. material selection of quality chrome molybdenum alloy steel.

2. corrugated shape is the international common UV-shaped, well-designed, low rate of shrinkage

   of paper, pressed high quality cardboard, high strength.

3. imported precision machine tools, advanced profile grinding and computer indexing technology,

   to achieve Leng Dimension in line with national standards.

4.leng tooth surface be treated by the medium-frequency quenching, there is high on the 

   corrugating roll, was drum-shaped, long service life.

Hei Yan also can supply Carton packing machine,Eblow machine,Hot elbow forming machine,bending machine etc.

If you have a need ,can contact us by following: