July 4, 2017

The precast concrete manhole rings molds used PP plastic and made by injection process,Square design,Unlike the circular concrete manhole rings molds.

This precast concrete manhole cover molds also used PP plastic by injection process, Anti-skid designs with vines and cross carving pattern,And there is a circle of blank in the center of precast concrete manhole cover,The function is could be to add any type of warning signs for anywhere.

A type of special plastic manhole covers,Japanese customer ordered the circle types of black and white two colors,Mainly using PA66 plastic raw material by injection processing,Just like PP and ABS.

This round concrete manhole covers molds made of PP by injection process,Also the rings molds too,They could be a set to combined construction for concrete pouring.