Look at the material: For mass production, choose Q235 or above highquality steel molds (wear-resistant and deformation-resistant), for small batch temporary use, choose HDPE plastic molds (lightweight and low cost), and for batch, choose composite material molds.
Look at the structure: Ensure high dimensional accuracy (error ≤ 3mm), with reinforcement ribs to resist expansion, good joint, and a demolding slope or auxiliary structure (for easy operation).
Look at the process: The inner wall is smooth and flawless, the welds (steel m) are flat without spatter, the injection molding (plastic molds) is uniform, and the joint gap ≤ 0.5mm.
Look at the manufacturer: Choose a manufacturer with qualifications and municipal project cases, confirm the quality of the samples and after-sales service (repairs, spare parts supply, technical guidance).
Match demand: Combine the production batch, rainwater well specifications (regular / irregular), and budget, avoid excessive investment or insufficient quality.