Mold Transfer Cylinder (Reciprocating Cylinder)

Bore diameter: Φ63 mm – Φ180 mm

Rod diameter: Φ45 mm – Φ125 mm

Stroke: ≤4,000 mm (per mold transfer distance)

Operating pressure: continuous 12 MPa, max 16 MPa

Max push force: 407 kN (at 16 MPa, Φ180 mm bore)

Max pull force: approx. 210 kN (at 16 MPa, Φ180 mm bore with Φ125 mm rod)

Breakaway pressure: ≤0.15 MPa (ultra-low friction, sensitive response)

Piston velocity: 0.1 – 0.8 m/s (fast mold transfer, adjustable)

Operating frequency: up to several hundred reciprocating cycles per hour

Internal leakage: ≤0.02 ml/min (at 12 MPa, over seal service life)

Temperature range: -25 ℃ to +120 ℃ (standard); -40 ℃ to +150 ℃ customizable

Suitable for: 500–5,000 ton injection molding machines, multi-color/two-shot machines, high-speed molding machines, etc.

Ultra-Low Friction & Rapid Response

A filled PTFE and special polyurethane low-friction composite seal package achieves breakaway pressure as low as 0.15 MPa. Combined with large-diameter ports and low-backpressure flow paths, the cylinder reverses direction and accelerates/decelerates in milliseconds, perfectly matching high-speed injection molding cycles.

Special Drain Port Design, Anti-Pressure-Trap & Anti-Leak

Strategically placed drain channels between the guide bush and seal stack effectively evacuate the oil film accumulated during high-speed cycling, preventing pressure trapping in the seal system. The trace drained oil is piped back to the tank, eliminating external leakage contamination and improving system contamination resistance.

Long-Stroke, High-Rigidity Construction

The piston rod is made from high-yield quenched and tempered alloy steel, with hard chrome or Ni/Cr alloy plating, maintaining excellent bending stiffness even at full extension. The cylinder bore is precision honed and electroplated, and works with the guide rings to ensure stick-slip-free, vibration-free motion over the entire stroke.

Wear & Corrosion Resistance for Long Life

The piston rod surface can be upgraded with laser cladding, ceramic thermal spray, or QPQ treatment for enhanced wear and corrosion resistance in humid, dusty, or mildly acidic/alkaline environments. The sealing system is designed for the full service life of the molding machine, backed by extensive field-proven reliability.

Flexible Mounting & Maintenance-Free

Mounting dimensions, port orientations, and flange interfaces are fully customizable to the machine’s transfer carriage. Self-lubricating composite bushings in the clevises eliminate daily greasing and provide low wear and long life even under extremely high-frequency reciprocation.

Special bore, rod, and ultra-long stroke

Built-in displacement sensor for closed-loop mold position control

Full stainless steel body and piston rod (special plastics or corrosive environments)

Explosion-proof certification

Special mounting flanges and port configurations