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400T SMC Manhole Covers Press press view 1
BMC/SMC Manhole Covers · Hydraulic Press Machine

400 Ton Four Pillar Hydraulic Press for BMC/SMC Manhole Covers

400T Rated Capacity
100 mm/s Slider Down Speed
5–11 mm/s Slider Pressing Speed
100 mm/s Slider Return Speed
400T SMC Manhole Covers Press press view 1
400T SMC Manhole Covers Press press view 2
400T SMC Manhole Covers Press press view 3
400T SMC Manhole Covers Press press view 4

01 — Press System

400 Ton Four Pillar Hydraulic Press Machine

This 400-ton press from Sinter Hydraulics India delivers high-performance composite compression molding for heavy-duty BMC/SMC manhole covers and frame assemblies. It offers an efficient manufacturing solution for producing corrosion-proof, anti-theft, high-load infrastructure components designed to replace traditional cast iron.

Use Case

The 400-ton four-pillar hydraulic press provides high-pressure compression molding of thermoset composite manhole covers and frame rings. It ensures precise heat and pressure distribution for thick, ribbed sections to achieve high load-bearing ratings ranging from A15 to D400 standards for municipal and industrial road networks.

  • Core Applications: High-tonnage compression molding of durable, anti-theft composite infrastructure components for municipal, utility, and road drainage networks.
  • Material: Bulk Molding Compound (BMC) and Sheet Molding Compound (SMC) blended with glass fibers, fillers, flame retardants, UV stabilizers, and anti-aging additives.
  • Products Processed: Heavy-duty round/square manhole covers, circular frame ring structures, and municipal inspection chamber covers.
  • Why 400 Ton Hydraulic Press: Delivers exact thermoset curing pressure, ensures uniform fiber consolidation across thick ribbed walls, and guarantees long-term dimensional stability.

02 — Technical Specifications

SM 400 HP – HYDRAULIC PRESS MACHINE COMPLETE TECHNICAL DATA

SM 400 HP – Hydraulic Press Machine delivers precise and efficient composite molding for BMC/SMC manhole cover production. It ensures consistent quality, high strength, and reliable performance for large-scale infrastructure applications.

Capacity & Structural Design

  • Rated Capacity: 400 Tons (≈ 3920 kN)
  • Type: Fourpillar compression molding press
  • Frame: Heavy welded steel, stressrelieved
  • Structural safety factor: ≥ 1.35
  • Deflection @ full load: ≤ 0.06–0.08 mm

Hydraulic System

  • Cylinder: Doubleacting
  • Bore: 350–450 mm
  • Stroke: 500–900 mm
  • Working pressure: 28–32 MPa
  • Proportional/servo control for precision

Compression Cycle

  1. Fast mold closing
  2. Precompression (material spread)
  3. Full compression
  4. Thermoset curing (heat + pressure)
  5. Dwell for polymer crosslinking
  6. Controlled decompression
  7. Mold opening

Heated Platen System

  • Heating method: Electric / thermal oil
  • Temperature range: 130–170°C
  • Uniformity: ±3–5°C
  • Multi-zone temperature control

Working Envelope

  • Platen size: 1200 × 1200 mm
  • Optional: 1500 × 1500 mm
  • Daylight: 1200–1800 mm
  • Columns: Ø 160–200 mm

Control System

  • PLC + advanced HMI
  • Recipe-based molding cycles
  • Pressure–time–temperature graph control
  • Data logging (quality traceability)
  • Safety PLC, light curtains

SM 400 HP — Model Specifications

  • Nominal Force: 4000 KN
  • Maximum Hydraulic Pressure: 25 MPa
  • Max Opening Height of the Slider: 1250 mm
  • Max Stroke of the Slider: 800 mm
  • Effective Bed Size: 1260 × 1160 mm
  • Slider Down Speed: 100 mm/s
  • Slider Pressing Speed: 5–11 mm/s
  • Slider Return Speed: 100 mm/s
  • Ejector Cylinder Nominal Force: 400 KN
  • Stroke of the Ejection Cylinder: 300 mm
Production Case Study

BMC manhole covers (D400 class) Production Line

BMC/ SMC CompositeMaterial
Dia 600 mm – 900 mm (D400 Class)Manhole Size
180 – 300 SecCycle time
140 °C – 160 °CTemperature
High load bearing capacity
Zero scrap value anti-theft
Superior chemical corrosion resistance
Excellent wear abrasion durability
High structural rib strength
Precise rim seat fitting
Fast mass production output

03 — Die / Mold System

Precision BMC/SMC Manhole Covers Die Mold Engineering

Precision BMC/SMC Manhole Covers Die Engineering ensures accurate molding, uniform thickness, and superior structural strength. It delivers consistent quality, high load-bearing performance, and long-lasting durability for infrastructure applications.

Technical Specifications

Mold Type

  • Heavy-duty compression molding die 
  • Matched metal mold (upper + lower halves)

Mold Materials

  • Tool steel (H13 / P20 / CrMo alloy)
  • Hardened to 48–55 HRC
  • Wear-resistant coating

Mold Construction

  • Upper punch (top surface + design pattern)
  • Lower cavity (load-bearing ribs)
  • Guide pillars for alignment
  • Ejection system (hydraulic pin ejectors)

Heating System

  • Internal heating channels
  • Multi-zone temperature control
  • Uniform heat distribution for curing

Venting & Degassing

  • Air vent grooves
  • Gas escape channels
  • Prevents voids and blowholes

Surface Finish

  • Anti-slip textured surface (checkered/ribbed)
  • Logo/branding embossing
  • Smooth underside structural ribs

Mold Life: 200,000 – 500,000 cycles

400T SMC Manhole Covers Press die mold
Case Study (Die Performance)

Precision BMC/SMC Manhole Covers Die Mold

P20+Ni AlloyDie Steel
58–62 HRCHardness
Vacuum HardeningHeat Treatment
High compressive wear strength
Deep rib cavity fill
Superior shear edge sealing
Zero mold deformation deflection
High surface impact toughness
Thermal stress crack resistance
Long mold service lifespan

04 — Product Application

Where BMC/SMC Manhole Covers Are Used

BMC/SMC manhole covers are widely used in urban infrastructure, roads, drainage systems, and utility networks for safe and durable access points. They offer high strength, corrosion resistance, and long service life for heavy-duty outdoor applications.

Industry Applications

Road & Urban Infrastructure

In road and urban infrastructure, BMC/SMC manhole covers are used for sewer systems, drainage networks, and stormwater access points. They provide high strength, corrosion resistance, and long-lasting safety in heavy-duty outdoor environments.

Utilities & Telecom

In utilities and telecom sectors, BMC/SMC manhole covers are used for electrical cable chambers, telecom access points, and underground service pits. They ensure durable, corrosion-resistant, and secure access for essential utility networks.

Industrial Facilities

In industrial facilities, BMC/SMC manhole covers are used in chemical plants, refineries, and manufacturing sites for safe access points. They offer excellent corrosion resistance and durability in harsh and chemical-exposed environments.

Infrastructure Projects

In infrastructure projects, BMC/SMC manhole covers are used across smart cities, highways, airports, and railway stations for safe and durable utility access. They provide high strength, corrosion resistance, and long-lasting performance in heavy-traffic environments.

IndustryScenario
Municipal Sewer manhole covers
Infrastructure Road drainage systems
Utilities Electrical and telecom chambers
Industrial Chemical plant flooring covers
Smart Cities Modern infrastructure solutions

Finished Product Gallery

400T SMC Manhole Covers Press finished product 1
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400T SMC Manhole Covers Press finished product 3
400T SMC Manhole Covers Press finished product 4
400T SMC Manhole Covers Press finished product 5
400T SMC Manhole Covers Press finished product 6

05 — Key Advantages

Why Choose the 400-Ton Sinter Hydraulic Press

It delivers uniform compression and precise molding for high-strength, durable BMC/SMC components. Designed for heavy-duty applications, it ensures consistent quality and long service life in infrastructure use.

01

Precise thermoset curing

Ensures accurate heat and pressure control for optimal curing of BMC/SMC materials. It delivers consistent strength, dimensional stability, and defect-free manhole covers and rings.

02

Low defect rate

Ensures precise molding with controlled curing, minimizing defects in production. It delivers consistent quality and reliable performance for manhole covers and rings.

03

High load bearing (A15 to D400 class)

Produces manhole covers and rings with excellent load-bearing capacity across A15 to D400 classes. It ensures reliability and durability for light to heavy-duty infrastructure applications.

04

Anti-theft (no scrap value)

BMC/SMC manhole covers have no resale scrap value, reducing theft risks. They ensure secure, long-term installation in public and industrial infrastructure.

05

Reduced maintenance

Produces durable, corrosion-resistant manhole covers that require minimal upkeep. It ensures long-term performance with lower maintenance costs in infrastructure applications.

06

High ROI manufacturing line

Enables cost-effective, high-volume production with consistent quality. It maximizes output while minimizing waste and operational costs, ensuring strong return on investment.

Get In Touch

Ready to Build Your
Production Line?

Our engineering team will size the press, die system, and automation to your target output, tile profile, and material spec. Quotations typically within 48 hours.

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