When PVC hose wire hose machine produces PVC hose, what are the reasons why the hose is not round?

1, PVC hose calibrating sleeve or stereotyped box nozzle is blocked, resulting in PVC hose surface uneven cooling;
2. Not one line between the die head and the styling box spray box tractor;
3, the water level of the shaping tank is too high, PVC hose is soaked in water;