Cement Prefabricated House Molding Process

The cement prefabricated house molding process is divided into two categories based on the mold material: cement house molds (non-plastic materials) and cement prefabricated block plastic molds, with the following process characteristics:

Cement House Molds (Non-Plastic Materials) Process

1. Mold Structure and Materials The mold body is welded using 8-12mm thick Q345 steel plates, with the frame reinforced by No. 10 I-beams. The overall load-bearing strength reaches 20MPa, capable of withstanding the lateral pressure and vibration impact during large-volume concrete pouring. The mold is designed with a mortise-and-tenon splicing structure, equipped with precision guide columns, and the installation error is strictly controlled within 1mm to ensure module splicing accuracy.

2. Demolding and Molding Process Imported demolding agents are applied to the inner side of the mold, combined with vibration molding technology. High-frequency vibration is used to expel air bubbles from the concrete, increasing its density by 30%. After molding, the surface flatness error is ≤3mm, reducing the need for post-repair work. A single set of molds can produce standard cement house modules measuring 3.6m×6m×3m, with a daily turnover rate of 2-3 times, resulting in high production efficiency.

Cement Prefabricated Block Plastic Molds Process

1. Production Process Injection molding technology is employed. A mold prototype is created according to the design requirements of the prefabricated blocks. Plastic pellets are heated to a molten state and then injected into the molding machine, where they are filled into the mold cavity under high pressure. After cooling, the mold is removed, and the edges are trimmed. The mold design often incorporates reinforcing rib structures to enhance resistance to deformation; some molds have anti-stick coatings added to the inner walls to improve demolding efficiency.

2. Application Areas and Advantages Plastic molds are widely used in the fields of architecture and civil engineering, such as for residential wall tiles, floor tiles, road curbs, and garden paving stones. Their advantages include:

• Lightweight: The weight of plastic materials is only 1/5 that of steel molds, facilitating manual handling and installation.
• Surface Quality: The inner walls of the molds are smooth, eliminating the need for secondary grinding of the prefabricated block surfaces after demolding.
• Durability: They can be reused 50-100 times and are resistant to moisture and corrosion, resulting in low maintenance costs.
• Precision Control: The injection molding process can achieve a dimensional tolerance of ±0.5mm, meeting the requirements for standardized construction.

3. Maintenance and Care After use, cement residues must be immediately cleaned to prevent hardening and clogging of the mold. When cleaning, use a soft brush and clean water; the use of metal tools for scraping is prohibited. The molds should be stored in a dry, cool environment to avoid direct sunlight, which can cause plastic aging. If minor cracks or deformations occur, they can be repaired by hot melting or restored by replacing parts.