Production Process of PC Prefabricated Components for Houses

The production process of PC prefabricated components (prefabricated concrete components) for houses mainly includes the following steps:

1. Preliminary Preparation and Detailed Design
   The technical team needs to refine the construction blueprints provided by the design institute, completing component splitting, reinforcement bar arrangement, embedded part positioning, and lifting point design, among others. A multi-party review is organized to ensure design feasibility. This stage is the foundation for subsequent production and requires ensuring that the drawing accuracy matches construction requirements.

2. Mold Design and Fabrication
   Special molds are fabricated from steel based on the detailed design drawings, meeting requirements for stiffness, strength, and stability to prevent deformation during concrete pouring. Mold accuracy directly affects the geometric dimensions of the components and must undergo strict inspection before being put into use.

3. Raw Material Arrival and Quality Control
   Raw materials such as cement, sand, gravel, and reinforcement bars must be inspected for certificates of conformity and quality assurance documents, and sampled for retesting according to standards. For example, reinforcement bars need to be tested for tensile strength, and concrete aggregates need to have their silt content controlled. Unqualified materials are strictly prohibited from use to ensure component quality from the source.

4. Reinforcement Bar Processing and Binding, Embedded Part Installation
   After being straightened, cut, and bent, reinforcement bars are bound or welded into shape within the bench or mold, while embedded parts (such as pipeline sleeves and connectors) are installed. This step requires strict adherence to the drawings to ensure accurate spacing of reinforcement bars, thickness of the protective layer, and positioning of embedded parts.

5. Concrete Placing and Vibration
   Concrete is uniformly poured into the mold using a placing machine, followed by vibration on a vibration table to compact it, eliminating air bubbles and gaps. The duration and frequency of vibration must be properly controlled to avoid segregation caused by over-vibration or reduced strength due to under-vibration.

6. Roughening and Curing
   A roughening machine treats the surface of the component to enhance its bond with in-situ concrete. During the curing stage, the component is sent to a curing kiln where the temperature is regulated (usually between 50-70℃) through a central control system. Conventional curing for 8-12 hours is sufficient to achieve lifting strength, shortening the production cycle.

7. Demolding and Quality Inspection
   After curing, the component is demolded and inspected for dimensional deviations (such as length ±5mm), strength (reaching at least 75% of the design value), and surface defects (such as cracks and honeycombing). Unqualified products must be repaired or scrapped to ensure 100% compliance of outgoing components.

8. Surface Treatment and Storage/Transportation
   The surface of the component is polished, repaired, or decorated to improve its appearance. It is then stored in a dedicated yard according to its number. During transportation, fixed supports are used to prevent deformation, ensuring quick positioning during installation on-site.

This process achieves efficient and precise production of components through standardized operations and strict quality inspections, providing quality assurance for prefabricated buildings.