A single mould can produce up to three precast concrete sections in just 16 hours
The manufacture of one elevator shaft section takes 6 hours.
- The shafts that attach the mould blocks of the outer mould to each other are raised about 200 mm, after which the outer mould is lifted and transferred to the oiling station, where it is cleaned and oiled.
- The shafts that attach the mould blocks of the inner mould to each other are raised about 200 mm, after which the inner mould is lifted and transferred to an available concreting base (to a concreting base from which the elevator shaft section, which has cured for the longest time, has been transferred to storage; curing time is about 12 hours. If more time is needed, it is a good idea to invest in a third concreting base, with which the curing time can be increased to 22 hours.)
- After this, the shafts are pressed to the lower position.
- The section from which the outer and inner moulds were dismantled is left to cure on the concreting base.
- The inner mould transferred to an available concreting base is cleaned and oiled.
- Steel reinforcement made in advance is lifted around the inner mould.
- The outer mould is lifted around the inner mould. The shafts that attach the mould blocks to each other are pressed to the lower position.
- Concreting and curing (concrete curing time is 5 hours).
Example of a normal working day (2 work shifts, 8 hours per shift)
The production line has one inner mould, one outer mould and two concreting bases:
6 am - 8 am You work as described above. Concreting ends at 08.00.
8 am - 1 pm Curing time and fabrication of reinforcement for the next precast section.
1 pm - 3 pm You work as described above. The second shift starts work at 14.00. Concreting ends at 3 pm.
3 pm - 8 pm Curing time and fabrication of reinforcement for the next precast section and for the concreting next morning (between 6-8 am).
8-10 pm You work as described above. Concreting ends at 10 pm.