Product Descriptions
General Overview - Positioning of the BOY Electric Series
The BOY 35 Electric is the 350 kN clamping force model of Dr. BOY's all-electric injection molding machine series. This platform combines the energy-efficient philosophy of the servo-hydraulic E series with the superior dynamics, parallel motion capability, and positioning accuracy of fully electric drive systems.
The BOY Electric series is specifically designed for applications requiring high precision, short cycle times, clean production environments, and exceptional repeatability. The BOY 35 Electric represents this concept in a compact footprint while delivering performance typically associated with larger all-electric machines.
Machine Concept - Hybrid Clamping with Fully Electric Motion Axes
The BOY 35 Electric employs Dr. BOY's proven two-platen hydraulic clamping unit while all motion-critical axes-namely injection, plasticizing, and ejector-are driven by fully electromechanical servo systems.
This hybrid concept enables:
- Highly dynamic injection movements
- Parallel operation of multiple axes
- Shorter overall cycle times
- Extremely precise position and force control
The mold mounting area is completely oil-free and designed without grease. This makes the BOY 35 Electric especially suitable for medical, electronics, and clean-room-oriented production environments.
Clamping Unit - Two-Platen System with 350 kN Force
The BOY 35 Electric is equipped with a two-platen clamping unit delivering a clamping force of 350 kN. Hydraulic pressure is converted into clamping force using differential pressure technology and a pressure intensifier, ensuring energy-efficient force generation.
Clamping unit technical data:
- Clamping force: 350 kN
- Tie-bar spacing (H × V): 280 × 254 mm
- Maximum daylight between platens: 500 mm
- Maximum mold opening stroke: 300 mm
- Minimum mold height: 200 mm
- Maximum mold weight on moving platen: 220 kg
- Mold opening force: 29.5 kN
- Mold closing force: 21.4 kN
- Maximum ejector stroke: 150 mm
- Ejector forward / return force: 20 / 20 kN
The ability to build up clamping force in parallel with the injection phase significantly contributes to shorter cycle times.
Fully Electric Injection Unit - SP 16-96
The BOY 35 Electric is equipped with the SP 16-96 all-electric injection unit optimized for thermoplastic processing. Both injection and screw rotation are fully servo-driven.
Available screw diameters:
- 14 mm
- 18 mm
- 22 mm
- 24 mm
- 28 mm
- 32 mm
Injection unit technical data (depending on screw diameter):
- Maximum theoretical stroke volume: 6.2 - 76.4 cm³
- Maximum theoretical shot weight (PS): 5.6 - 69.5 g
- Theoretical injection volume flow rate: 25.7 - 134.3 cm³/s
- Maximum injection speed: 167 mm/s
- Maximum specific injection pressure: 1,255 - 2,739 bar
- Maximum screw stroke: 40 / 80 / 95 mm
- Nozzle contact force: 48 kN
- Nozzle retraction stroke: 205 mm
- Screw torque: 75 - 200 Nm
- Maximum screw speed: 500 rpm
- Screw recovery force: 30 - 44 kN
- Heating power (nozzle + barrel): 2,560 - 5,800 W
These parameters enable reliable processing from micro parts to thin-wall and high-precision technical components.
E-Injection, E-Dosing, and E-Ejector Technologies
In the BOY 35 Electric, injection, dosing, and ejector axes are fully electric.
Key advantages of this configuration include:
- Direct measurement of screw force instead of hydraulic pressure
- Real-time force analysis using load cells
- Exceptional positional repeatability
- Elimination of stick-slip effects typical of hydraulic systems
- Stable, vibration-free motion even at very low ejector speeds
The electric ejector can operate in parallel with mold plate or robot movements, further reducing total cycle time.
Control System - Procan ALPHA 6
The BOY 35 Electric is equipped with Dr. BOY's latest Procan ALPHA 6 control platform.
Control system features:
- 9-stage injection speed control
- 9-stage injection pressure control
- 9-stage holding pressure control
- Holding pressure switchover based on stroke, pressure, time, or cavity pressure
- Closed-loop control for injection and back pressure
- Integrated production and quality monitoring
- USB, Ethernet, and OPC interfaces
- EUROMAP 67 robot interface
This control architecture ensures stable part quality even within extremely narrow process windows.
Energy Efficiency and Dynamic Performance
Thanks to fully electric motion axes and a servo-motor-driven hydraulic system, the BOY 35 Electric achieves excellent energy efficiency.
Energy and general performance data:
- Total installed power: 23.66 - 26.9 kW
- EUROMAP 6 dry cycle time: approximately 1.5 s
- Hydraulic system pressure: 210 bar
- Oil tank capacity: 35 liters
Parallel axis operation allows clamping force buildup during injection while dosing can continue throughout the cycle.
Machine Dimensions and Layout Advantages
Despite being a fully electric machine, the BOY 35 Electric maintains a compact footprint.
Physical dimensions:
- Dimensions (L × W × H): 2,871 × 797 × 1,949 mm
- Footprint: 2.29 m²
- Net weight (without oil): 1,400 kg
These characteristics make the machine particularly suitable for cellular manufacturing and automation integration.
Material Compatibility and Application Fields
The BOY 35 Electric can process the following material groups with high precision:
- Thermoplastics
- Engineering and high-performance plastics
- Micro and thin-wall components
- Medical and electronic parts
- Components requiring superior surface quality
The oil-free mold area and quiet operating characteristics make the machine ideal for clean-room and precision manufacturing environments.
Conclusion - Why Choose the BOY 35 Electric?
The BOY 35 Electric combines the high precision, dynamic performance, and energy efficiency of all-electric injection technology with Dr. BOY's compact design philosophy and robust mechanical engineering. Fully electric injection, dosing, and ejector systems provide exceptional process reliability for tight-tolerance and high-value components.
For applications where space constraints, precision, cycle time, and energy efficiency are critical, the BOY 35 Electric represents a long-term, reliable injection molding platform.
