Product Descriptions
General Overview - Positioning of the Dr. BOY 35 E Platform
The Dr. BOY 35 E is a high-precision injection molding machine developed for small and medium tonnage applications. Despite its four tie-bar clamping design, the machine maintains very compact dimensions. It features a fully hydraulic, reciprocating screw system, a two-platen clamping unit, and a laterally movable injection unit, combining ergonomic operation with ease of maintenance.
The fundamental design objective of the Dr. BOY 35 E is to ensure stable and repeatable production of tight-tolerance technical parts, even under long-term serial production conditions. Its strong price-to-performance ratio and low machine-hour costs position the Dr. BOY 35 E as a competitive solution in its class.
Clamping Unit - Rigid Four Tie-Bar Design with 350 kN Force
The Dr. BOY 35 E is equipped with a four tie-bar, two-platen clamping system delivering a clamping force of 350 kN. This torsion-resistant structure maintains mold parallelism even during extended cycle times.
Clamping unit technical data:
- Clamping force: 350 kN
- Tie-bar spacing (H × V): 280 × 254 mm
- Maximum daylight between platens: 500 mm
- Maximum adjustable 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: 80 mm (optional 130 mm or 150 mm)
- Ejector forward/back force: 23.8 / 15.8 kN (optional 49.9 / 35.0 kN)
This configuration provides excellent dimensional stability, particularly for precision technical components.
Injection Unit - Wide Screw Selection and High Performance
The Dr. BOY 35 E is available with five different injection unit versions and screw diameters ranging from 14 mm to 32 mm. The standard SP 96 injection unit is optimized for thermoplastic processing.
SP 96 injection unit technical data:
- Screw diameters: 24 / 28 / 32 mm
- Screw L/D ratios: 22 / 18.6 / 16.3
- Maximum theoretical stroke volume: 43 / 58.5 / 76.5 cm³
- Maximum theoretical shot weight (PS): 39.1 / 53.2 / 69.5 g
- Injection force: 101 kN
- Theoretical injection rate: 68.7 / 93.5 / 122.2 g/s
- Maximum specific injection pressure: 2,231 / 1,639 / 1,255 bar
- Maximum screw stroke: 95 mm
- Nozzle force / contact pressure: 48 kN / 245 bar
- Screw speed: 10-250 / 10-400 rpm (infinitely adjustable)
- Screw recovery force: 44 kN
- Heating power (nozzle + barrel): 5,800 W
- Material hopper capacity: 20 liters
These values support a broad application range from micro parts to medium-sized technical components.
Differential Injection and High-Speed Capability
The Dr. BOY 35 E supports differential injection technology when equipped with the SP 45 injection unit. This system enables significantly higher injection speeds compared to conventional injection units.
This capability is particularly advantageous for:
- Thin-wall parts
- Components with long flow paths
- Applications with narrow process windows
BOY 35 E HV - Injection into the Parting Line
The BOY 35 E HV variant features a vertically oriented injection unit combined with a horizontal clamping system, allowing injection directly into the mold parting line. This configuration minimizes visible gate marks on decorative surfaces and significantly reduces or eliminates the need for hot runner systems.
This design is especially suitable for:
- Components with high visual surface quality requirements
- Decorative plastic parts
- Runnerless production concepts
Hydraulic System and Energy Efficiency
The Dr. BOY 35 E is equipped with a servo-motor-driven hydraulic pump system, generating hydraulic power only when required.
Energy and hydraulic data:
- Installed drive power: 7.4 kW
- Total installed power: 13.2 kW
- Hydraulic system pressure: 210 bar
- Oil tank capacity: 65 liters
- EUROMAP 6 dry cycle time: approximately 1.5 s
With the optional EconPlast plasticizing unit, energy consumption and screw wear can be further reduced.
Control System - Procan ALPHA
The Dr. BOY 35 E is equipped with the Procan ALPHA control system, featuring an intuitive interface and advanced process monitoring functions.
Control system capabilities:
- 8-stage injection speed control
- 8-stage holding pressure control
- Closed-loop injection and back-pressure regulation
- Holding pressure switchover based on cavity pressure
- USB, Ethernet, and OPC interfaces
- Production monitoring and part counting
Material Compatibility and Process Flexibility
The Dr. BOY 35 E can process the following material groups:
- Thermoplastics
- Elastomers
- Silicones and LSR
- Thermosets (duromers)
- Metal and ceramic injection molding feedstocks (PIM technology)
This broad compatibility makes the machine a strong platform for medical, electronics, automotive, and micro-mechanical applications.
Machine Dimensions and Layout Advantages
The compact design of the BOY 35 E provides significant advantages in production space utilization.
Physical dimensions:
- Dimensions (L × W × H): 2,398 × 817 × 1,949 mm
- Footprint: 1.96 m²
- Net weight (without oil): 1,195 kg
For the BOY 35 E HV variant:
- Footprint: approximately 2.0 m²
- Net weight: 1,495 kg
Conclusion - Why Choose the Dr. BOY 35 E?
The Dr. BOY 35 E injection molding machine delivers a highly balanced solution for small and medium tonnage injection molding applications through its high clamping force, precise injection control, differential injection capability, and compact design. With its wide screw selection, robust hydraulic architecture, and advanced control system, the machine ensures long-term production reliability for tight-tolerance technical parts.
In applications where space efficiency, process stability, and high part quality are critical, the Dr. BOY 35 E stands out as a reliable and durable injection molding platform.
