Injection Unit Traverse Cylinder (Shooting Cylinder)

Bore diameter: Φ63 mm – Φ140 mm

Rod diameter: Φ36 mm – Φ90 mm

Stroke: ≤1,500 mm (per injection unit travel distance)

Operating pressure: continuous 21 MPa, max 25 MPa

Max push force: 384 kN (at 25 MPa, Φ140 mm bore)

Max pull force: approx. 226 kN (at 25 MPa, Φ140 mm bore with Φ90 mm rod)

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

Piston velocity: 0.03 – 0.5 m/s (slow approach / fast retract, adjustable)

Operating frequency: up to several hundred cycles per hour, 1–2 advances per injection cycle

Internal leakage: ≤0.02 ml/min (at 21 MPa, over seal service life)

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

Suitable for: 80–5,000 ton injection molding machines, two-color/two-shot machines, high-speed precision molding machines, etc.

Ultra-Low Friction & Sensitive Response

A special filled PTFE and polyurethane composite low-friction seal package achieves breakaway pressure as low as 0.15 MPa. Combined with large-diameter ports and low-backpressure flow paths, the unit advances and retracts rapidly, stick-slip free, with smooth, gentle nozzle-to-sprue contact that protects both components.

Strategic Drain Port Design, Anti-Pressure-Trap & Anti-Contamination

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 reliability.

Long-Stroke, High-Rigidity Construction

The piston rod is fabricated from high-yield quenched and tempered alloy steel, with hard chrome or Ni/Cr alloy plating, maintaining excellent bending stiffness throughout the full unit travel. The cylinder bore is precision honed and works with the guide rings to ensure vibration-free, true-track motion.

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 injection unit carriage and frame structure. Self-lubricating composite bushings in the clevises eliminate daily greasing and provide low wear and long life even under extremely high-frequency cycling.

Special bore, rod, and stroke

Built-in displacement sensor for closed-loop injection unit position control

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

Explosion-proof certification

Special mounting flanges and port configurations