1Forming machine is Close type and offer vacuum forming

2Foming module is moving in a tunnel

3Forming tunnel is cold by water

4Forming module is made of hard alloy steel and anti-corrosion and abrasion

5No any connection between forming module , the reduce time to change

6Production of high-speed, cooling rapidly;

7Through the corresponding mold forming both inside and outside a smooth, uniform corrugated pipe corrugated