Wet casting puring the concrete between inner mould and outer mould throught the attached vibrator motor forming the manhole. manhole base are formed through mold top.
Which is Japanese type. open and close the molds very convinience. operation simple.
Dismantle mould ways:
Inner mold automatic contracting through control one small bolts which located in mould bottom
Outer mold automatic pull and push through the guide rails
Maintenance ways:
Natural or Steam curing maintenance