4 Roll Double Pre Pinching Plate Rolling Machine
Product Overview
Monotech Engineers Pvt. Ltd. presents the Scrap Hydraulic Plate Rolling Machine engineered for accurate, repeatable rolling of plates and scrap sheets into cylinders, cones, and curved profiles in recycling yards, fabrication shops, and service centers. A rigid welded frame, induction‑hardened rolls, and high‑pressure hydraulics deliver consistent curvature with precise pre‑bend and cone‑forming control, supporting faster fit‑up and less rework on variable stock. Available in working widths from 1000–3000 mm and thickness capacities from 3–25 mm (MS), with custom builds beyond these ranges—including stainless and abrasive scrap duty—the system offers optional 4‑roll pre‑pinch and cone attachments to minimize edge flats and weld gaps across diverse applications.
Applications of 4 Roll Double Pre Pinching Plate Rolling Machine
Plate & Sheet Rolling
Accurate rolling of metal sheets and plates into cylindrical shapes for fabrication, ensuring consistent curvature and minimal deformation.
Tank & Vessel Manufacturing
Used in forming shells for storage tanks, pressure vessels, and industrial containers with high precision and repeatability.
Cone Rolling Applications
Efficient formation of conical components required in fabrication, ducting, and custom engineering applications.
Pre-Welding Preparation
Ensures properly rolled plates for seamless welding operations, improving joint quality and reducing rework.
Light to Medium Fabrication Work
Ideal for workshops and industries handling mild steel, stainless steel, and aluminum for general fabrication needs.
Operational Benefits
Product Range
| Monotech Model No. | Working Length (mm) | Maximum Thickness | Pre Bend Thickness | Top Roll Dia | Bottom Dia | Side Rolls Diameter | Power HP |
|---|---|---|---|---|---|---|---|
| MT- DPPRM- 4H- 0620 | 2100 | 06 | 04 | 160 | 160 | 140 | 05 |
| MT- DPPRM- 4H- 0820 | 2100 | 08 | 06 | 190 | 190 | 150 | 7.5 |
| MT- DPPRM- 4H- 1020 | 2100 | 10 | 08 | 210 | 190 | 175 | 10 |
| MT- DPPRM- 4H- 1320 | 2100 | 13 | 10 | 230 | 210 | 190 | 10 |
| MT- DPPRM- 4H- 1620 | 2100 | 16 | 12 | 270 | 250 | 220 | 15 |
| MT- DPPRM- 4H- 2020 | 2100 | 20 | 16 | 300 | 270 | 240 | 20 |
| MT- DPPRM- 4H- 2520 | 2100 | 25 | 20 | 330 | 300 | 250 | 20 |
| MT- DPPRM- 4H- 3020 | 2100 | 30 | 24 | 360 | 330 | 270 | 25 |
| MT- DPPRM- 4H- 3220 | 2100 | 32 | 25 | 360 | 350 | 280 | 25 |
| MT- DPPRM- 4H- 3520 | 2100 | 35 | 28 | 380 | 350 | 300 | 30 |
| MT- DPPRM- 4H- 4020 | 2100 | 40 | 32 | 400 | 360 | 320 | 30 |
| MT- DPPRM- 4H- 5020 | 2100 | 50 | 40 | 460 | 430 | 380 | 40 |
| MT- DPPRM- 4H- 0625 | 2600 | 06 | 04 | 190 | 190 | 150 | 05 |
| MT- DPPRM- 4H- 0825 | 2600 | 08 | 06 | 210 | 190 | 170 | 7.5 |
| MT- DPPRM- 4H- 1025 | 2600 | 10 | 08 | 230 | 210 | 190 | 10 |
* Capacities rated for MS. (LTS 45g/mm²) Bending capacities stated are only representative and non dinding. Allow extra capacity nditions. Right to change specification, features without entice reserved. Compliance with safety requirements as per local regulations is responsibility of the user
Design & Construction
- ✔Hydraulic Architecture: High-pressure hydraulic power pack with proportional valves for smooth force and speed modulation, enabling controlled pre-bending and rolling across varying scrap thicknesses and materials.
- ✔Roll Configuration: Flexible setup as 3-roll initial pinch, 3-roll pyramid, or 4-roll pre-pinch. Rolls are alloy-steel, precision-ground, induction-hardened, with optional crowning to maintain roundness and reduce flats.
- ✔Frame & Bearings: Stress-relieved welded frame with heavy guideways, spherical roller bearings, and labyrinth seals to withstand deflection and contamination in dusty yard conditions.
- ✔Positioning: Hydraulic side-roll cylinders with linear scales or encoders. Synchronized roll movement maintains repeatable radii and minimizes edge flats through precise side-roll travel.
- ✔Controls: Pendant or fixed panel with pressure/readout gauges, digital roll position display, inch/jog and auto cycles, emergency stop, and safety interlocks for consolidated control and operator safety.
- ✔Finish & Protection: Industrial coatings, guarded drive areas, and centralized lubrication points for long-term durability and simplified routine maintenance in multi-shift operations.
What Makes Our Design Unique?
- ✔High-Force Pre-Bending: 4-roll hydraulic platform enables true double pre-pinch at both edges, improving roundness near the seam and minimizing weld gaps on thicker or variable plates.
- ✔Precision Radius Control: Proportional hydraulics with linear feedback ensures smooth, repeatable side-roll motion for consistent curvature across the sheet length.
- ✔Power Under Load: High-torque hydraulic drives sustain rolling speed and traction under varying thickness, preventing stalling or scuffing and maintaining surface quality.
- ✔Built for Harsh Duty: Hardened rolls, wear strips, and dust-sealed bearings safeguard critical components, extending service life in abrasive scrap environments.
- ✔Maintenance-Friendly: Cartridge valve manifolds, advanced filtration, and easy access to cylinders and guides streamline servicing and reduce downtime during inspections.
Control & Handling
- ✔HMI Workflows: User-friendly interface with material selection and recipe management for thickness, yield, crown, passes, and speed. Live charts track load, flatness, and energy use, with alarm history and maintenance scheduling.
- ✔Assisted Setup: Auto-recommendations for crown and penetration based on material properties; teach mode stores proven parameters for quick reuse.
- ✔Recipe Management: Pre-set and recallable material recipes ensure consistency and reduce setup time.
- ✔Remote Monitoring: Secure connectivity for live diagnostics, alarm logs, and predictive maintenance alerts.
- ✔Training & SOPs: On-site commissioning, safety sessions, operator/maintenance SOPs, and QA documentation templates ensure safe, consistent adoption.
- ✔Error-proofing & Safety: Interlocks, guided workflows, and alarm-driven prompts prevent operator errors and material damage.
- ✔Data and Analytics: Automatic logging of runs, deviations, and KPIs supports quality control and process optimization.
- ✔Operator Ergonomics: Intuitive multilingual touch interface with simplified navigation reduces fatigue and error.
Key Features & Accessories
Performance-Driven Design
Variable Rolling Speed
Variable rolling speed through flow-controlled hydraulics handles thin-to-heavy gauges with smooth ramp-up/ramp-down for precise seam alignment and reduced flats.
Digital Position Presets
Digital position presets with return-to-zero accelerate repeat setups and improve consistency across shifts and operators.
Safety Systems
Safety systems include over-pressure reliefs, nip-area safety ropes, dual-channel E-stop, door/guard interlocks, and load-holding valves on cylinders for robust protection and controlled stops.
Continuous-Duty Hydraulics
Continuous-duty hydraulics with dedicated cooling and fine filtration sustain long runs and stable performance across temperatures and workloads.
Want to Know More?
Download our brochure or request more information to learn how Monotech can help you achieve your manufacturing goals.
The MONOTECH Advantage
Monotech Engineers operates with a modern, well-equipped manufacturing facility designed for precision engineering and heavy fabrication. Our infrastructure supports high-capacity production, ensuring seamless handling of raw materials, machining, assembly, and quality inspection — all under one roof. This enables faster turnaround, consistent quality, and reliable delivery timelines.
With over three decades of industry experience, Monotech Engineers has built a strong reputation in sheet metal machinery and industrial solutions. Our deep engineering expertise allows us to understand complex customer requirements and deliver machines that perform with precision, durability, and efficiency in demanding environments.
Our machines are widely used across diverse industries including automotive, fabrication, construction, and heavy engineering. From precision CNC machines to robust forming solutions, Monotech products are trusted for their performance, accuracy, and long operational life.
We believe in building long-term partnerships, not just delivering machines. Our growing base of satisfied clients reflects our commitment to quality, service, and continuous support. From installation to after-sales service, we ensure our customers operate with confidence and reliability.
Build Quality & Benefits
Heavy-Duty Machine Structure
Our 4 Roll Double Pre Pinch Plate Rolling Machines are built with a robust, high-strength welded steel frame engineered for continuous heavy-duty applications. The structure is stress-relieved to eliminate internal stresses, ensuring superior rigidity, long service life, and consistent rolling accuracy.
Double Pre-Pinching System
Equipped with a double pre-pinching mechanism, the machine enables precise bending of both plate edges without removing or repositioning the plate. This eliminates flat ends, reduces rework, and significantly improves production efficiency and output quality.
4 Roll Precision Rolling Technology
The advanced 4-roll configuration allows better control over plate alignment and rolling process. The bottom rolls clamp the plate firmly while side rolls perform precise bending, ensuring high accuracy, perfect roundness, and repeatable results.
Hardened & Ground Rollers
All rollers are manufactured from high-grade alloy steel, induction hardened, and precision ground to ensure excellent wear resistance, long operational life, and superior surface finish of rolled components.
4 Roll Precision Rolling Technology
The advanced 4-roll configuration allows better control over plate alignment and rolling process. The bottom rolls clamp the plate firmly while side rolls perform precise bending, ensuring high accuracy, perfect roundness, and repeatable results.
Hardened & Ground Rollers
All rollers are manufactured from high-grade alloy steel, induction hardened, and precision ground to ensure excellent wear resistance, long operational life, and superior surface finish of rolled components.
Advanced Hydraulic System
The machine is powered by a high-performance hydraulic system that ensures smooth, synchronized, and jerk-free movements. This results in consistent force application, energy efficiency, and reliable operation across different plate thicknesses.
Ease of Operation & Higher Productivity
The 4-roll design allows one-pass rolling with minimal plate handling, reducing setup time and operator effort. This significantly improves productivity and ensures faster job completion.
Versatility & Application Flexibility
Suitable for rolling cylinders, cones, and complex curved shapes across a wide range of materials and thicknesses. Ideal for fabrication shops, pressure vessels, wind towers, and heavy engineering industries.
Safety & Reliability
Integrated safety features such as overload protection, emergency stop systems, and controlled roller movement ensure safe operation. The machine is designed for long-term reliability with minimal maintenance requirements.
