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Operating from Huangyan, Taizhou—recognized globally as China's Mould Capital—Taizhou Zhongyue Mould Co., Ltd. is a specialist manufacturer of Plastic Manhole Mould solutions. We develop heavy-duty injection moulds for underground drainage systems, sewer inspection chambers, catch basins, and septic tank components. Designed for extreme injection conditions, our moulds ensure high structural strength and long-term durability, meeting strict municipal engineering standards for load-bearing performance and reliability.
| Type | Common Sizes / Features | Design Focus |
|---|---|---|
| Inspection Chamber Mold |
Ø315mm – Ø1000mm, 1m depth
|
Vertical parting line control, deep core cooling, anti-vacuum deformation |
| Manhole Base / Bottom Mold |
Multi-inlet (90°/45°) connections
|
Complex slider mechanisms for pipe socket cores, leak-proof sealing surface |
| Catch Basin / Cone |
Square/Rectangular, debris grate recess
|
Reinforced rib design, sandblasted cavity surface for concrete adhesion |
| Riser / Extension Mold |
Adjustable height sections
|
Tight concentricity, easy-stripping draft angle, uniform wall thickness |
Manhole molds are characterized by extreme depth-to-diameter ratios. We utilize thick-walled forged steel and reinforced core support pillars to prevent core shift during high-pressure injection, ensuring the wall thickness remains uniform.
Cooling deep vertical cores is critical to cycle time. We design spiral baffles or BeCu (Beryllium Copper) inserts inside the core to extract heat efficiently, preventing warpage and reducing cycle times (often 2–5 minutes per shot).
Manhole bases often have multiple pipe inlets. We engineer hydraulic/pneumatic side-actions (sliders) with precise locking mechanisms to form pipe sockets accurately and ensure smooth retraction without damaging the part.
We run MoldFlow analysis to predict sink marks on thick flange areas and optimize packing pressure. The mold structure includes support braces to prevent mold deflection under clamping force.
| Item | ZHONGYUE Standard |
|---|---|
| Mold Steel | Core/Cavity: 2738HH (pre-hard), H13 (high temper), S136 (corrosion-resistant) |
| Mold Base | Self-made heavy-duty standard (S50C) with reinforced support plates |
| Cavity | Usually 1-cavity (due to large size) |
| Runner | Hot Runner (YUDO/HASCO) preferred for large shot volume; Cold runner with insulated sprue optional |
| Ejection | Hydraulic ejector plate with long-stroke return pins; Air-assist optional |
| Surface Finish | Sandblasted (for concrete contact) or Polished (for water flow) |
| Mold Life | 300,000 – 500,000+ shots |
| Machine Tonnage | 1000T – 2500T+ depending on diameter and depth |
Backed by 50+ team numbers and 20+ CNC machines, ZHONGYUE provides full DFM reports, structural strength analysis, and T1 trial support for your infrastructure projects. Contact us today for a customized quotation on your next heavy-duty manhole or chamber mould.
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