HMD EM250 All-Electric Injection Molding Machine
Three injection-unit options · Permanent-magnet servo drive · High-speed precision molding
HMD EM250 is the all-electric model on the 2500 kN platform. The C430h / C620h / C850 modular injection units cover medium-large precision products, balancing high-speed injection with thick-wall part needs via the customized permanent-magnet servo motor and EATHERCAT bus.
Model Overview
| Item | Specification |
|---|---|
| Clamping platform | 2500 kN, new dedicated all-electric clamping mechanism |
| Injection-unit options | Choose freely from modular C430h / C620h / C850 |
| Injection speed | C430h 350 mm/s · C620h 300 mm/s · C850 200 mm/s |
| Drive system | Customized all-electric permanent-magnet servo motor + modular common-DC-bus drive |
| Control system | EATHERCAT bus high-response all-electric dedicated controller |
| Application | Medium-large precision structural parts, home appliance and automotive appearance parts, multi-cavity molds |
Injection Unit A: C430h
Φ36 / Φ40 / Φ45 screws.
| Item | Unit | Option A | Option B | Option C |
|---|---|---|---|---|
| Theoretical shot volume | cm³ | 183 | 226 | 286 |
| Shot weight (PS) | g | 167 | 206 | 260 |
| Shot weight (PS) | oz | 5.89 | 7.27 | 9.17 |
| Injection speed | mm/s | 350 | 350 | 350 |
| Injection rate | g/s | 324 | 400 | 506 |
| Screw diameter | mm | 36 | 40 | 45 |
| Injection pressure | MPa | 248 | 201 | 160 |
| Continuous holding pressure | MPa | 186 | 151 | 120 |
| Screw L/D ratio | — | 23.3 | 21 | 18.6 |
| Screw stroke | mm | 180 | 180 | 180 |
| Screw speed | r/min | 400 | 400 | 400 |
Injection Unit B: C620h
Φ40 / Φ45 / Φ50 screws.
| Item | Unit | Option A | Option B | Option C |
|---|---|---|---|---|
| Theoretical shot volume | cm³ | 251 | 318 | 392 |
| Shot weight (PS) | g | 228 | 289 | 357 |
| Shot weight (PS) | oz | 8.47 | 10.72 | 13.23 |
| Injection speed | mm/s | 300 | 300 | 300 |
| Injection rate | g/s | 342 | 433 | 535 |
| Screw diameter | mm | 40 | 45 | 50 |
| Injection pressure | MPa | 251 | 198 | 160 |
| Continuous holding pressure | MPa | 188 | 148 | 120 |
| Screw L/D ratio | — | 23.6 | 21 | 18.9 |
| Screw stroke | mm | 200 | 200 | 200 |
| Screw speed | r/min | 300 | 300 | 300 |
Injection Unit C: C850
Φ45 / Φ50 / Φ55 screws, suited to medium-large thick-wall parts.
| Item | Unit | Option A | Option B | Option C |
|---|---|---|---|---|
| Theoretical shot volume | cm³ | 342 | 422 | 511 |
| Shot weight (PS) | g | 311 | 384 | 465 |
| Shot weight (PS) | oz | 11.0 | 13.5 | 16.4 |
| Injection speed | mm/s | 200 | 200 | 200 |
| Injection rate | g/s | 289 | 357 | 432 |
| Screw diameter | mm | 45 | 50 | 55 |
| Injection pressure | MPa | 250 | 203 | 167 |
| Continuous holding pressure | MPa | 200 | 162 | 134 |
| Screw L/D ratio | — | 23.3 | 21 | 19.1 |
| Screw stroke | mm | 215 | 215 | 215 |
| Screw speed | r/min | 300 | 300 | 300 |
Clamping Unit Parameters
| Item | Unit | Specification |
|---|---|---|
| Clamping force | kN | 2500 |
| Mold opening stroke | mm | 560 |
| Platen size | mm | 925 × 925 |
| Distance between tie bars (H × V) | mm | 630 × 630 |
| Max. daylight | mm | 1160 |
| Mold thickness (min–max) | mm | 220 ~ 600 |
| Ejector stroke | mm | 150 |
| Ejector force | kN | 50 |
Power & Machine Body
| Item | Unit | C430h | C620h | C850 |
|---|---|---|---|---|
| Total connected power | kW | 46 | 50 | 55 |
| Number of temp control zones | — | 4 | 4 | 6 |
| Overall dimensions (L × W × H) | m | 6.6 × 1.9 × 2.4 | 6.6 × 1.9 × 2.4 | 6.6 × 1.9 × 2.4 |
| Machine weight | Ton | 12.5 | 12.7 | 12.7 |
Machine envelope 6610 × 1870 × 2350 mm; platen 840 × 840 mm (T-slot 22 × 38 × 18 mm).
Core Advantages
Dedicated All-Electric Permanent-Magnet Servo Motor
A customized permanent-magnet sync servo motor for all-electric machines delivers fast dynamic response, high power density, and significant energy savings.
New Clamping Mechanism
A high-rigidity clamping mechanism suited to all-electric characteristics provides smooth high-speed operation, high platen rigidity, and low deformation — especially suitable for precision molds and ultra-thin-wall products.
Modular Injection Unit
A modular injection design lets the same clamping module be combined with different injection units to meet the special needs of different products.
High-Speed Injection · 40 ms Response
Optimized injection moving parts raise injection speed to 0–300 mm/s with response under 40 ms, meeting demanding production requirements for ultra-thin precision parts.
EATHERCAT Bus Control
A high-response all-electric dedicated controller paired with EATHERCAT bus communication delivers strong noise immunity, fast computation, real-time data, and high control precision.
Modular Common-DC-Bus Drive
A modular common-DC-bus drive offers a compact structure, high power density, easy maintenance, and support for multiple communication protocols.
Sealed Quantitative Grease Lubrication
A sealed pressurized quantitative grease lubrication system uses minimal grease, ensures reliable lubrication, and keeps machine parts clean and tidy.