Plastic PP DN1000 Manhole Cover Mould

Plastic PP Manhole Cover Mould – Inspection Chamber Cover & Frame Injection Mold by ZHONGYUE MOULD

In a complete Plastic Inspection Chamber system — comprising Base  → Extension Shaft(s) → Reduction Cone  → Cover & Frame  — the top-most component must provide safe walk-on / drive-over access, watertight sealing with the cone or shaft, anti-slip walking surface, and compatibility with standard clear openings (Ø315mm / Ø450mm / Ø600mm).

The Plastic PP DN1000 Manhole Cover Mould is the precision injection tool that produces the cover lid (sometimes with steel reinforcement slot) and its matching PP frame (square or round) from Polypropylene (PP, MFI 2–6), often with integrally molded anti-slip pattern and EPDM/O-ring seal groove. At ZHONGYUE MOULD (Huangyan, Taizhou, China), we make molds for inspection chamber covers compliant with EN 124 / EN 13598-2 — available in light-duty (A15/B125) to heavy-duty (C250/D400 with composite/steel insert option) — engineered with 718H steel, baffled cooling, and mirror-/texture-finished cavity.

Plastic Manhole Mould specifications :

Typical Technical Specifications – PP Manhole Cover & Frame Mould

Make your next Plastic Manhole Mould project brighten!

Typical Manhole Cover & Frame Configurations

Note: For DN1000 inspection chamber systems, the access cover is typically Ø315mm or Ø450mm clear opening (fitted to the top of the DN1000→DN450 cone or DN450 shaft adapter), NOT a Ø1000mm cover.

How ZHONGYUE Engineers a High-Quality Manhole Cover Mould

① Steel Selection – Balance Wear & Cost

Cover molds are smaller than base/shaft but require fine surface finish:

Mold life: 500,000 – 1,000,000 shots.

② Optimized Cooling & Cycle Time

Covers (thickness 5–12mm) and frames (wall 6–10mm) cool relatively fast, but seal groove & hinge/latch bosses are heat traps:

Baffled water lines + bubbler tubes in frame core for uniform cooling.

Cavity plates with series/parallel water channels 15–20mm from surface.

Typical cycle time: 30–60 seconds (cover), 45–80 seconds (deep frame).

③ Surface Finish – Anti-Slip Texture & Mirror Polish

Cover Walking Surface: EDM stone texture / diamond-knurl texture (Ra 3–6μm) per EN 124 anti-slip requirement — etched or EDM-textured in cavity.

Frame Socket Interior: Smooth (Ra ≤ 0.8μm) for easy EPDM seal seating.

Branding: Embossed/debossed company logo, load class marking ("B125"), standard (EN 124) — all engraved into cavity/cover-top cavity.

④ Gating, Venting & Ejection

Usually side fan gate or edge overlap gate to fill from frame skirt or cover periphery → avoids weld line on anti-slip top face.

Vents at last-fill zones (hinge boss, lock pin recess) to prevent burn marks.

Ejection via ejector pins under frame flange / cover rim; optionally stripper plate for frame.

Optional two-cavity family mold (1 Cover + 1 Frame in one mold) available for matched sets.

⑤ Optional Steel / Composite Insert Molding

For C250/D400-rated covers: mold can be designed with metal insert placement pockets — steel reinforcing plate placed manually or by robot before close → over-molded with PP.

Typical Applications

Municipal & Residential Drainage: Ø315/Ø450 access covers on inspection chambers (compatible with DN1000 system via cone)

Domestic Driveways / Light Vehicular: B125 rated PP frame with textured lid

Landscaped Areas / Pedestrian Zones: A15 classified lightweight covers

Industrial / Car Park (w/ steel insert): C250 rated composite PP+steel lid (molded in our insert-molding capable tool)

Compatible with EN 124 / EN 13598-2 when produced with certified PP & proper rib design

Why ZHONGYUE MOULD for Your Manhole Cover Mold?

Complete Inspection Chamber System Capability – We make molds for Base (2/3/4-way) + Shaft (250–1000mm) + Cone + Cover & Frame — one-stop for chamber system suppliers.

Surface Texture Expertise – EDM anti-slip pattern, logo engraving, mirror-polish socket interiors.

Family Mold Option – Cover + Frame in one tool to save machine changeover time.

Full QC Package – CMM inspection, steel certs, T0 trial video & sample report before shipment.

Spare Parts & Support – Extra ejector pins, seals, heater bands (if hot nozzle), remote troubleshooting.

Complete Your Inspection Chamber Mold Set

Pair this PP Manhole Cover & Frame Mould with our:

[Plastic PP DN1000 Manhole 4-Way Base Mould]

[Plastic PP DN1000 Manhole Extension Shaft Mould L=1000mm]

[Plastic PP DN1000 Manhole Cone Mould DN1000→DN450/DN600]

How we processing the project?

About us

Driven by the philosophy:

“Quality Makes the Future, Focus Creates Professional”

Zhongyue Mould is a leading company in the plastic injection air conditioner Cover mould industry. Our highly experienced team of engineers and designers have many decades of combined experience in plastic air conditioner Cover mould design and manufacturing. We provide a comprehensive service, specializing in the production of high-quality and high-precision air conditioner Cover moulds. We have also assisted numerous customers in customizing various types of plastic air conditioner Cover moulding lines.

We can also offer comprehensive assistance in the management of your production process. The procurement department will purchase high-quality raw materials, while the technical department will select the appropriate plastic formula. In accordance with the parameters of the plastic air conditioner Cover mould life requirements and market positioning, we will select the most suitable plastic air conditioner Cover parameters, structure, etc. Our extensive production capacity allows us to deliver plastic air conditioner Covers promptly, at competitive prices and with guaranteed quality.