DEKUMA RA SERIES
RUBBER INJECTION MOLDING MACHINES
Dekuma RA Series rubber injection molding machines are advanced production solutions developed for applications that require high precision, high clamping force, and long-cycle vulcanization processes. The RA series is positioned among Dekuma's heavy-duty rubber injection machines and is widely used in automotive, energy, electrical insulation, infrastructure, and industrial rubber sectors.
Thanks to their vertical clamping - horizontal injection architecture, RA series machines enable safe and stable operation of large and heavy molds. This structural concept significantly increases process stability, especially in high-tonnage and multi-cavity mold applications.
STRUCTURAL DESIGN OF RA SERIES MACHINES
Dekuma RA series machines are engineered with a strong focus on long-term stability and durability, featuring a highly rigid frame and optimized power transmission.
Key structural features include:
• High-strength, stress-relieved steel machine frame
• Vertical clamping unit combined with a horizontal injection unit
• Large platen design suitable for heavy mold weights
• Clamping mechanism ensuring precise platen parallelism
• Modular and service-friendly machine layout
This robust structure extends mold life while improving part quality in the production of large-size rubber components.
RUBBER INJECTION TECHNOLOGY AND OPERATING PRINCIPLE
In RA series machines, the rubber compound is prepared in the plasticizing unit under tightly controlled conditions. The screw and barrel geometry is optimized to prevent premature vulcanization or scorching of the rubber material. The plasticized compound is then injected into the mold under high pressure.
The process consists of the following steps:
• Plasticization of rubber under low shear stress
• Stable and controlled injection
• Mold clamping under high clamping force
• Vulcanization process
• Automatic or semi-automatic part removal
This system delivers high-quality results, particularly when processing EPDM, NR, SBR, NBR, HNBR, silicone, and specialty elastomers.
RA SERIES MODEL RANGE AND CLAMPING FORCE OPTIONS
The Dekuma RA series is offered with a very wide clamping force range, targeting heavy industrial applications.
Typical clamping force options include:
• 300 tons
• 400 tons
• 500 tons
• 600 tons
• 800 tons
• 1000 tons and higher for special projects
Thanks to this wide range, the RA series covers an extensive product spectrum, from small technical rubber parts to very large and thick-walled rubber components.
TECHNICAL AND NUMERICAL SPECIFICATIONS
Typical technical specifications of Dekuma RA series machines fall within the following ranges:
Clamping Force
• 3000 kN - 10,000 kN
Injection Unit
• Injection volume: 300 - 3000 cm³
• Injection pressure: 1600 - 2200 bar
• Injection speed: adjustable according to rubber compound
Screw Diameter
• 55 mm - 100 mm
Plasticizing Capacity
• 20 - 120 kg/hour
Mold Opening Stroke
• 600 - 1200 mm
Platen Dimensions
• 700 × 700 mm - 1200 × 1200 mm
Heating System
• Multi-zone barrel heating
• PID-controlled temperature management
Hydraulic System
• Servo-controlled hydraulic drive
• High pressure stability
• Reduced energy consumption
All parameters can be customized according to application-specific requirements.
SERVO HYDRAULIC SYSTEM AND ENERGY EFFICIENCY
The servo hydraulic system used in RA series machines generates power only when required. This provides several advantages:
• Significantly reduced energy consumption
• Stable hydraulic oil temperature
• Lower noise levels
• Extended service life of system components
Servo control enables extremely precise management of injection pressure and speed, directly improving part consistency and quality.
AUTOMATION AND INDUSTRY 4.0 COMPATIBILITY
Dekuma RA series machines are fully compatible with automation and digital manufacturing environments.
Supported integrations include:
• Robotic part removal systems
• Automatic insert loading systems
• Conveyor and feeding solutions
• Vision inspection and quality monitoring systems
• Production data collection and reporting
The machine control system supports data exchange and remote monitoring in line with Industry 4.0 standards.
APPLICATION AREAS
RA series rubber injection molding machines are widely used in:
• Automotive rubber components
• High-voltage electrical insulators
• Energy and infrastructure components
• Railway systems and heavy industry
• Vibration damping and sealing elements
The RA series is particularly well suited for large-size rubber parts requiring high mechanical strength and dimensional stability.
ADVANTAGES OF THE DEKUMA RA SERIES
• Very high clamping force options
• Structure suitable for large and heavy molds
• Precise injection and vulcanization control
• Low scrap rates
• Long machine and mold service life
• Compatibility with automation and custom projects
• Global service and spare parts network
