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Metal drainage moulds — types, specifications, and wholesale procurement
Metal drainage moulds (also called concrete drainage formwork or precast drainage forms) are used by precast concrete manufacturers and construction contractors to produce drainage channels, U-channels, V-channels, box culverts, road kerbs, and surface water management units at scale.
Common types: U-channel moulds (standard sizes 100mm–600mm wide), V-channel moulds for rural roads and agriculture, box culvert moulds (rectangular section pipe), kerb stone moulds, and gutter moulds. Heavy-duty drainage moulds for infrastructure projects are fabricated from 5–10mm steel plate. Light-duty moulds for on-site casting are available in 3–4mm plate.
Material options: mild steel plate (most common — Q235 or S235JR) welded construction, cast iron (for long production runs with high dimensional accuracy requirements), fibreglass-reinforced steel (composite — lighter, corrosion-resistant), and stainless steel (for specialty applications). Steel moulds are typically treated with oil, release agent coating, or powder coat on the non-contact surfaces.
For wholesale buyers, drainage moulds are sold per unit or per matched set (inner + outer mould pair). Custom sizes are standard in this category — most suppliers can fabricate to specific channel width, depth, wall thickness, and length dimensions. Buyers should specify: channel profile (U, V, box), internal dimensions (width × depth), mould length (typically 1m or 0.5m sections), wall thickness of cast product, steel grade, surface treatment, and any connection hardware (assembly bolts, alignment pins).
Frequently asked questions
What is the difference between steel and cast iron drainage moulds?
Steel drainage moulds are welded from plate and are lighter, easier to handle, and cost-effective for low-to-medium production volumes. They are suited for on-site or small-batch precast production. Cast iron moulds are heavier but provide superior dimensional stability and surface finish for high-volume production runs — the dimensional accuracy of cast iron is better maintained over thousands of casts. Cast iron moulds cost more upfront but offer lower per-cast cost over their service life.
Can I order custom-size drainage moulds?
Yes — custom sizing is standard in the drainage mould category. Most suppliers fabricate to your specified internal dimensions, wall thickness, and mould length. Provide detailed drawings or dimensional specifications. Chinese and Indian fabricators typically produce custom samples within 10–14 days for approval before mass production. Minimum order for custom moulds is typically 5–20 sets.
What are typical MOQ and lead times for metal drainage moulds?
Catalogue sizes (standard U-channels and kerb moulds): MOQ 5–20 sets, 2–4 weeks lead time. Custom fabricated: MOQ 5–10 sets, 4–8 weeks including sample approval. Turkish suppliers serving EU/MENA markets offer shorter delivery times at slightly higher prices. Indian suppliers offer competitive pricing for African markets with transit times of 12–20 days from Nhava Sheva or Mundra.
How many casts can a metal drainage mould produce?
A well-maintained mild steel mould typically produces 300–800 casts before dimensional tolerance degrades beyond acceptable limits, depending on concrete mix, release agent use, and handling care. Cast iron moulds can produce 2,000–5,000+ casts. Reusable steel moulds should be inspected after every 50–100 casts and repaired if warping or surface damage is evident. Using a quality concrete release agent (mould oil) significantly extends mould life.
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