Yuken hydraulic pump for plastic machinery
Yuken Hydraulic Pumps for Plastic Machinery: A Comprehensive Guide
YUKEN is a leading global provider of hydraulic solutions specifically engineered for plastic machinery, including injection molding, extrusion, blow molding, and thermoforming machines. Their product range is optimized for the unique demands of plastic processing—high pressure, frequent load changes, continuous operation, and energy efficiency.
🌟 Core Product Series for Plastic Machinery
1. A Series Variable Displacement Piston Pumps (28 MPa Rated)
The workhorse for mid-sized injection molding machines (50–1000 tons), delivering precise pressure control and energy savings of 30–50% compared to fixed pumps.
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Model
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Displacement (cm³/rev)
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Rated/Max Pressure (MPa)
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Ideal Machine Tonnage
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Typical Applications
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A37
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36.7
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28/35
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50–200 tons
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Clamping, injection, plasticizing
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A56
|
55.6
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28/35
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200–500 tons
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Main pump for mid-sized machines
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A70
|
70.2
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28/35
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400–700 tons
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High-flow injection
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A90
|
90.5
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28/35
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600–1000 tons
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Heavy-duty main pump
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A100
|
100.4
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28/35
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800–1200 tons
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Extra-large machines
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2. A3H/A3HG Series High-Pressure Piston Pumps (35 MPa Rated)
For ultra-large machines (1000–4000 tons), extrusion lines, and heavy-duty applications requiring extreme pressure stability.
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Model
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Displacement (cm³/rev)
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Rated/Max Pressure (MPa)
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Through-Drive Capability
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Ideal Applications
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A3H56
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55.6
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35/40
|
No
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1000–1500 ton machines
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A3H71
|
70.6
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35/40
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No
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1500–2000 ton machines
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A3H100
|
100.4
|
35/40
|
No
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2000–2800 ton machines
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A3HG145
|
145.2
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35/40
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Yes (tandem)
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2800–3500 ton multi-circuit machines
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A3HG180
|
180.7
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35/40
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Yes (tandem)
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3500–4000 ton gantry-type machines
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3. AR/ARL Series Small-Displacement Pumps
Perfect for auxiliary functions (ejector, mold adjustment, core pulling) in small to mid-sized machines.
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Model
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Displacement (cm³/rev)
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Control Options
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Applications
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AR16
|
16.2
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01/04
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Ejector, mold adjustment
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ARL22
|
22.1
|
01
|
Mold movement, auxiliary actions
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4. PV2R Series Vane Pumps (16–21 MPa Rated)
Economical, low-noise solutions for small machines and auxiliary circuits with stable flow characteristics.
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Model
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Displacement Range (cm³/rev)
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Rated Pressure (MPa)
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Applications
|
|
PV2R1
|
6–23
|
16
|
Small machine auxiliary circuits
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PV2R2
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26–53
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16
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Mid-sized machine auxiliary circuits
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PV2R3
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48–116
|
21
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Extruders, blow molding machines
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|
PV2R12/13
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Dual displacement
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16/21
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Multi-action composite systems
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⚙️ Critical Control Options for Plastic Processing
YUKEN offers specialized control technologies that optimize performance for plastic machinery’s multi-stage processes:
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Control Code
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Type
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Key Benefits for Plastic Machinery
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Optimal Process Stages
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01
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Pressure Compensated
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Stable holding pressure, minimal overflow, energy saving
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Injection holding pressure, clamping, extrusion constant pressure
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04
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Electro-Hydraulic Proportional
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Precise speed control, multi-stage injection, fine movement
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Injection, plasticizing, mold movement, proportional control
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07
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Remote Pressure Control
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Centralized operation, enhanced safety
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Large machine remote pressure adjustment
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09V
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Constant Power + Pressure Compensation
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Motor overload protection, shock resistance
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Heavy-duty injection, plasticizing
|
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14
|
Load Sensing (LS)
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On-demand flow supply, energy saving 40%+
|
Multi-action composite processes, high-efficiency production
|
🎯 Application-Specific Selection Guide
1. Injection Molding Machines (by Tonnage)
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30–100 tons: A37-01/04, AR22-01
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100–500 tons: A56-04/09V, A70-14
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500–1500 tons: A90/A100-14, A3H56-01
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1500+ tons: A3H71/A3H100-14, A3HG145 (tandem)
2. Extrusion/Granulation Machines
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Single-screw: A37/A56-01 (constant pressure), PV2R3 (economic)
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Twin-screw/Large: A3H71/A3H100-01, A3HG tandem pumps
3. Blow Molding/Hollow Forming Machines
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Small: AR22-04, PV2R12
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Large: A56/A70-14, A3H56-04
✅ Key Advantages for Plastic Machinery
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Energy Efficiency: Variable displacement pumps reduce power consumption by 30–50% compared to fixed pumps
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Precision Control: Advanced control options enable tight tolerances and consistent part quality
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High Pressure Stability: Maintains precise pressure during holding phase, reducing flash rates by 75%+
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Reliability: Designed for 20+ hour continuous operation with extended service intervals
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Low Noise: Special designs achieve ≤70 dB(A), improving workplace environment
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Fast Response: Rapid pressure/flow adjustment for multi-stage injection processes
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Customization: Wide range of control options and configurations to match specific machine requirements
🛠️ Installation & Maintenance Best Practices
Critical Optimizations for Plastic Processing Environments
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Sealing: Use FKM (Viton) seals (-F model) for high-temperature, long-duration operation
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Contamination Control: Install high-pressure filters (β₃≥100) with ≥20μm inlet filtration, maintaining NAS 7–8 cleanliness
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Noise Reduction: Select low-noise models (-N) for quiet operation
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Servo Integration: Pair with servo motors for additional 15–25% energy savings
Maintenance Schedule
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Fluid: Use ISO VG46 anti-wear hydraulic oil
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Oil Change: Every 1500 hours (reduce to 1000 hours for continuous operation)
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Routine Checks: Weekly (≤55°C), vibration, noise monitoring; monthly inspection of pistons and valve plates
📊 Energy-Saving Success Stories
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200-ton injection molding machine: A56-04 replaced fixed pump, achieving 42% monthly energy savings (electricity cost reduced from ¥85,000 to ¥49,000)
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4000-ton ultra-large machine: A3H180-01 reduced clamping energy consumption from 22kW to 7.5kW, cutting flash rate from 3.2% to 0.8%
📝 Model Naming Example (Injection Molding Machine)
A56-F-R-04-C-K-32
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A56: Series + displacement
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F: Flange mounting (standard)
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R: Clockwise rotation
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04: Electro-hydraulic proportional control
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C: Standard type
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K: Shaft extension (motor-compatible)
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32: Design number
For a customized pump recommendation, provide:
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Machine type (injection/extrusion/blow molding)
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Machine tonnage/size
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Specific application (clamping, injection, etc.)
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Energy efficiency requirements
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Operating pressure/flow needs
