Dr. BOY Injection Technology and the Positioning of BOY XS
Dr. BOY is one of the few manufacturers worldwide that has specialized exclusively in small and medium tonnage injection molding machines. Rather than downsizing large machines, Dr. BOY's engineering philosophy is based on developing compact, highly precise injection molding platforms specifically designed for small and micro part production.
The BOY XS model represents the purest and most technically focused expression of this philosophy in the field of micro injection molding. It is purpose-built for micro components, sprueless single-cavity molds, and shot volumes measured in milligrams.
BOY XS - Machine Architecture Designed from the Ground Up for Micro Injection
The BOY XS is not a reduced version of a conventional injection molding machine. Every mechanical, hydraulic, and control element has been designed from scratch to meet the unique requirements of micro injection molding, including extremely short residence times, narrow processing windows, and exceptionally high repeatability.
One of the most striking features of the BOY XS is its ultra-compact design. With overall dimensions of approximately 1485 × 526 × 1380 mm, the machine occupies only 0.78 m² of floor space. This allows:
Installation of multiple machines within limited production areas
Use in cleanrooms, laboratories, and R&D environments
Implementation of modular and cellular manufacturing concepts
Despite its compact size, the BOY XS has a net weight of approximately 422 kg, ensuring full industrial robustness without compromise.
Clamping Unit - Tie-Bar-Less Cantilever Design with Maximum Accessibility
The BOY XS uses Dr. BOY's characteristic tie-bar-less two-platen clamping system. Diagonally arranged columns leave the mold area fully accessible from three sides, which is particularly advantageous for micro tooling and automation.
Clamping unit technical data:
Clamping force: 100 kN
Tie-bar spacing: 160 mm (diagonal 205 mm)
Maximum daylight opening: 250 mm (optional 200 mm)
Adjustable mold opening stroke: 150 mm
Minimum mold height: 100 mm (optional 50 mm)
Maximum mold weight on moving platen: 22 kg
Mold opening force: 15 kN
Mold closing force: 10 kN
These values provide ideal mechanical stability, reduced tool wear, and long mold service life for micro and high-precision applications.
Injection Unit - Micro Precision with Outstanding Numerical Performance
The BOY XS is available with multiple plasticizing units designed specifically for thermoplastic micro injection molding.
Available screw diameters:
8 mm - 12 mm - 14 mm - 16 mm - 18 mm
Theoretical maximum stroke volumes:
8 mm: 1.0 cm³
12 mm: 4.5 cm³
14 mm: 6.1 cm³
16 mm: 8.0 cm³
18 mm: 15.3 cm³
Theoretical maximum shot weights (PS):
8 mm: approx. 1.1 g
12 mm: 4.1 g
14 mm: 5.6 g
16 mm: 7.3 g
18 mm: 13.9 g
Maximum specific injection pressures:
8 mm: 2534 bar
12 mm: 3128 bar
14 mm: 2298 bar
16 mm: 1760 bar
18 mm: 1722 bar
Especially in the 8 mm and 12 mm screw configurations, these values enable exceptional filling control for micro injection molding applications.
Screw Geometry and Plasticizing Dynamics
The success of the BOY XS in micro injection molding is largely driven by optimized screw geometry and controlled motion profiles.
Screw L/D ratios:
8 mm: 22
12 mm: 19.7
14 mm: 16.9
16 mm: 14.6
18 mm: 16
Screw stroke:
8 mm: 20 mm
12-16 mm: 40 mm
18 mm: 60 mm
Screw speed:
Maximum 340 rpm for all configurations, continuously adjustable
This configuration results in:
Extremely short residence times
Minimized risk of material degradation
Safe processing of temperature-sensitive polymers
Injection Forces and Flow Rates
Injection forces:
8 mm: 12.7 kN
12-16 mm: 35.4 kN
18 mm: 44.0 kN
Theoretical injection flow rates:
8 mm: 4.0 g/s
12 mm: 20.7 g/s
14 mm: 28.3 g/s
16 mm: 36.8 g/s
18 mm: 46.3 g/s
These figures ensure extremely controlled, vibration-free filling behavior in micro molds.
Procan ALPHA Control System - Digital Backbone for Micro Processes
The BOY XS is equipped with the multi-patented Procan ALPHA control system, designed to deliver exceptional stability in very narrow process windows.
Control system capabilities:
Up to 8-stage injection speed profiles
Up to 8-stage holding pressure profiles
Closed-loop control of injection and back pressure
Real-time process monitoring
High cycle-to-cycle repeatability
The intuitive operator interface reduces human error and enables full process standardization.
Ejector System and Part Handling Safety
The BOY XS features a three-sided open ejector area, ensuring safe and reliable removal of delicate micro parts.
Ejector technical data:
Maximum ejector stroke: 50 mm
Ejector push / pull force: 8.4 / 8.4 kN
An optional stainless-steel collection drawer allows damage-free handling of sensitive components.
Hydraulic System and Energy Efficiency
General machine data:
Installed drive power: 3.0 kW
Total installed power: approx. 4.3-4.8 kW
Hydraulic system pressure: 300 bar
Oil tank capacity: 28 liters
Dry cycle time (EUROMAP 6): approx. 1.3 seconds
These values make the BOY XS one of the most energy-efficient machines in the micro injection molding segment.
Typical Application Areas
The BOY XS is ideally suited for:
Micro injection molding
Sprueless single-cavity molds
Medical and laboratory components
Electronic and micro-mechanical parts
R&D, pilot production, and precision series manufacturing
Cleanroom and space-restricted production facilities
Why Choose the Dr. BOY XS?
The BOY XS delivers an unrivaled production platform by combining a micro-optimized injection unit, extremely high specific injection pressures, an ultra-compact footprint, and advanced control technology. In applications where space, precision, energy efficiency, and process reliability are critical, the BOY XS clearly demonstrates the technical strength of Dr. BOY engineering.
