What is a diamond-pattern drainage cover mould?
It is a plastic (PP/ABS) injection mould for a precast concrete trench or ditch cover whose top is formed with a raised diamond / rhombus tread (菱形纹). The diamonds interlock into a continuous anti-slip walking surface that drains grit off the raised edges — a common finish on municipal drainage trenches, road shoulders, sidewalks, cable trenches and railway-side walkways. It is the diamond sibling of dot (stud), striped and cobblestone-pattern covers.
Diamond pattern vs dot pattern — which anti-slip surface should I choose?
Both are anti-slip treads; the difference is visual and project-standard. Dots (圆点) are round raised studs, the dominant choice on railway tunnel cable trenches (see our HST/Tie Biao dot series). Diamonds (菱形) are interlocking rhombus ribs that read as a continuous directional tread, widely specified on municipal roadside and plaza trenches. Performance is set by slab thickness and reinforcement, not by the tread shape — choose the pattern your drawing or authority standard calls for; we make both from the same PP/ABS tooling.
What sizes are in this diamond-pattern catalogue?
Standard municipal series (6 moulds): 44.4×49.4×3, 54.4×49.4×2.5, 59.4×49.5×6, 49.5×34.5×5 (narrow 35cm-class trench), 54×50×5 and 84.4×49.4×3 (long 84cm slab). Heavy railway series (3 moulds): 100×50×8, 126×50×8 and the 148×50×7 diamond Tie Biao (菱形铁标) railway-standard cover. Length × width × thickness in cm; any other size is made to drawing.
What is the diamond Tie Biao (菱形铁标) 148×50×7 cover for?
Tie Biao (铁标) means the cover is made to the Chinese railway industry standard rather than to a single project. The 148×50×7 diamond Tie Biao slab — together with the 100×50×8 and 126×50×8 heavy diamond covers — is a long-span, 7-8cm thick section for railway and high-speed-rail cable-trench walkways that run for kilometres beside the track. Long thick slabs span wide trenches and stay walkable for maintenance crews. We can cast your line code, standard number or project mark in the mould.
Does the diamond pattern affect the cover's load rating?
No — load comes from slab thickness and concrete reinforcement, not from the tread. In this same diamond range you have 2.5-3cm pedestrian covers (54.4×49.4×2.5, 44.4×49.4×3, 84.4×49.4×3) and 7-8cm railway covers (100×50×8, 126×50×8, 148×50×7). We do not label covers with a D/B load class — that is a property of the reinforced concrete you pour, not of the mould; tell us the application (sidewalk / road shoulder / trackside) and we confirm the section thickness.
Does a diamond-pattern cover need a notch or holes?
Only where the trench demands it. A notch (缺口) is moulded into the edge where a cable or pipe crosses the trench at that cover position — order it with notch width × depth and middle/end position; never cut it on site after casting. Holes are for water-carrying ditches where flow must pass through the slab. The diamond catalogue on this page is solid slabs; for notched or perforated covers see the notched cover range or send your drawing.
PP or ABS — what are these moulds made from?
Standard municipal diamond covers use PP (polypropylene): 150+ pour cycles, economical for long runs. ABS is chosen for large thin panels and heavy long slabs (the 84cm and 100-148cm pieces) because it holds a flat section without warping and releases the sharper diamond ribs. State PP or ABS, or let us recommend by slab size and thickness.
MOQ, lead time and how to order?
Catalogue moulds carry no strict MOQ across mixed SKUs; custom project moulds are made to order in roughly 15-30 days after drawing approval. For a quote send the cover L×W×T, the diamond-tread requirement, any notch or holes (size + position), the load/application, the project mark or standard number (e.g. Tie Biao), PP or ABS, quantities and destination port — FOB Ningbo/Shanghai. Fastest way: WhatsApp a photo of the cover you want to match and we confirm the nearest catalogue size or quote an OEM mould.
