Long-Stroke High-Rigidity Molding Machine

Ningbo Yalishi(Arlex) Plastic Machinery Co., Ltd. is one of the leading manufacturers and suppliers of long-stroke high-rigidity molding machine in China. Please feel free to wholesale advanced long-stroke high-rigidity molding machine made in China here from our factory.

 

The Long-Stroke High-Rigidity Molding Machine integrates a reinforced clamping unit with an extended daylight clearance, developed for deep-draw components and multi-cavity tooling. This structural setup provides deflection-resistant mold support alongside extended stroke movement, allowing automatic part extraction without platen tilting or frame distortion.

 

 

Mold Alignment: Structural stiffness limits platen deflection under clamping tonnage, maintaining guide pin and interlock alignment during continuous operation.

Clamping Stability: Rigid frame construction reduces parting-line movement during injection, helping to prevent flash formation on molded parts.

Force Distribution: Balanced load transfer across the platen area reduces stress concentrations on delicate core inserts and localized mold plate wear.

Mold Support: Uniform clamping load distribution minimizes mechanical fatigue across multi-cavity tool plates.

Production Consistency: Minimal platen flex helps hold tight part dimension tolerances across high-volume production runs.

 

 

Reinforced Cast Iron Frame: Base structures and platens are cast from high-tensile ductile iron to absorb vibration and withstand high locking forces.

Box-Type Platen Geometry: Finite Element Analysis optimized box platens direct clamping forces through the mold center to reduce center plate deflection.

Five-Point Toggle Kinematics: Hardened alloy pins and bronze bushings generate predictable toggle acceleration profiles and mechanical locking.

Tie Bar Engineering: Surface-hardened 40Cr steel tie bars with hard chrome plating bear tensile loads while maintaining equal stress distribution across all four bars.

Hydraulic Locking System: Closed-loop hydraulic control maintains stable holding pressure throughout the curing cycle.

 

 

Tie-Bar Clearance: Wide internal spacing between tie bars accepts large mold bases, side-core actuators, and service lines.

Maximum Mold Height: Extended distance between open platens accommodates hot-runner systems and multi-plate mold structures.

Minimum Mold Height: Broad mold-height adjustment range fits thinner single-cavity prototype tools without using extension blocks.

Platen Dimensions: Broad platen surfaces provide support for oversized mold backing plates.

Mounting Flexibility: Standardized T-slots and mounting hole configurations accommodate traditional mechanical clamps as well as rapid tool-changing systems.

 

 

Extended Opening Distance: Long travel distance provides necessary clearance for deep buckets, containers, and tall housing components.

Automation Clearance: Ample daylight permits top-entry or side-entry robots to access and retrieve deep parts without interfering with the mold face.

Multi-Point Ejector Layout: Symmetrical hydraulic ejector pin configuration applies balanced push force across large ejector plates.

Hydraulic Ejection: Dedicated hydraulic cylinders supply continuous ejector force throughout the full knock-out stroke.

 

 

Dual-Cylinder Injection: Twin injection cylinders align thrust along the screw axis, preventing off-center torque on the carriage.

Nitrided Screw and Barrel: SACM645 alloy steel with deep nitriding treatment offers wear resistance against filled resins and additives.

Multi-Zone Temperature Control: Ceramic heating bands paired with PID controllers manage thermal gradients across barrel zones.

Linear Motion Guides: Low-friction linear guide blocks support carriage movement to maintain alignment and shot repeatability.

 

 

Specification Item	Unit	Model 260	Model 360	Model 480	Model 600	Model 800
Clamping Force	kN	2,600	3,600	4,800	6,000	8,000
Tie-Bar Clearance (H×V)	mm	580 × 580	680 × 680	780 × 780	880 × 880	1,020 × 1,020
Mold Opening Stroke	mm	580	680	780	880	1,050
Max. Mold Height	mm	620	720	820	920	1,080
Min. Mold Height	mm	220	260	300	350	400
Ejector Stroke	mm	160	180	200	220	250
Ejector Tonnage	kN	70	90	110	140	180

 

 

System Assembly	Engineering Standard	Operational Detail
Structural Castings	QT500-7 Ductile Iron	Stress-relieved box structure engineered to resist platen flex
Toggle Mechanism	5-Point Kinematic System	Induction-hardened steel pins operating in graphite-bronze bushings
Tie Bars	40Cr Chrome-Plated Steel	Precision ground finish supporting balanced load distribution
Hydraulic Drive	Servo-Pump System	Variable speed servo motor paired with internal gear pump
Control Unit	Industrial Microcontroller	Dedicated PLC controller managing temperature, motion, and pressure sequences
Carriage Motion	Heavy-Duty Linear Guides	Linear support blocks reducing friction during injection movement

 

 

Dry Cycle Verification: Full-speed kinematic testing to check cycle response, toggle motion, and stroke repeatability before shipment.

Platen Alignment Measurement: Dial indicator measurements across platen faces verify parallelism across opening and closing movements.

Tie Bar Tension Balancing: Strain gauge sensors mounted on all four tie bars calibrate tension to achieve balanced clamping tonnage.

Hydraulic Dwell Testing: Sustained pressure holding tests verify valve stability and seal integrity under working oil temperatures.

 

 

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