There are many different processes for the production of precast concrete pc components.
A major feature of prefabricated concrete buildings is factory production, which is prefabricated. Factory production is a production method that is not equivalent to production in the factory. Precast concrete components are mostly produced in component factories and can also be produced on site, the latter being generally referred to as nomadic production.
The prefabricated components produced by the PC plant mainly include assembly line production, long-line method pedestal production, and fixed die table production.
The production line is suitable for the production of simple components, such as truss reinforced laminated panels, double-sided laminated wall panels, flat wall panels and so on. There are three types of pipelines: manual, semi-automatic and fully automatic. With a single type and uncomplicated components, the assembly line can achieve a high level of automation and intelligence.
Long line method
The long-line method is generally found in the production of prestressed members, such as SP plates and double T plates.
Fixed die table
The fixed die table method can produce various components such as columns, beams, slabs, wall panels, stairs, bay windows, balcony panels, corner members, etc. It has wide application range, flexible and convenient, strong adaptability and less startup capital. It is currently the most domestic application. Wide process.
The fixed mold base production components are “lying down” and the vertical mold production is standing and pouring. Prefabricated stairs are generally produced by vertical molds, and some factories use vertical molds to produce wall panels and pillars without decorative finishes, doors and windows.
For prefabricated building projects without a PC component factory nearby, it is possible to level the site and produce prefabricated components required for the project.
Prefabricated components with large weights, complex shapes and extra-wide dimensions are inconvenient or even impossible to transport, using nomadic production methods.
For individual projects, transport vehicles with inconvenient components on the road will enter the construction site and will also adopt nomadic production.
Factory procurement or on-site prefabrication?
The component factory is mechanized and highly automated, and can produce standard components in batches. It can also produce complex components with industrial workers, and the quality is controllable and stable. Compared to on-site prefabrication, factory procurement increases transportation costs and tax costs. Most of the Shanghai area is to purchase prefabricated concrete components from the factory.
Nomadic production of prefabricated components requires a site, and the total package unit needs to have the corresponding equipment and manpower, and the production capacity is limited. However, its investment is small and the construction period is short. The component has a short distance and low loss. Unified management of component production, installation and on-site construction. Nomadic production is suitable for projects with imperfect industrialization, small projects, and individual special projects.
Is the assembly line still a fixed die table?
The fixed die table method can be simply understood as moving the cast-in-place operation to the factory and producing various components, but the production efficiency is low and there is no room for growth in the future.
The production line of single-panel components can be automated and intelligent, and achieve high efficiency. But the investment is huge and requires a large market volume.
At present, laminated slabs and double-sided laminated shear walls can be highly automated, which is most suitable for assembly line production. The production of bay windows, formwork and reinforcement lashing are complex and suitable for production on fixed die tables. Ordinary wall panels are produced by assembly lines, and the production efficiency is improved to some extent.