This is the key section to manufacture the aluminum plastic composite panel, Its principle is that aluminum material, core and high polymer membrane are glued and shut finmly under the function of the high pressure of continuous high efver, forming and leveling the board. This line adopts the advantages of the similar lines from both domestic and abroad, only nothing less than foreign lines in appearance, but also better than the same in performances, manufacturing technique and maneuverability. Co-extrusion.