Squeeze Pins & Sleeves

Overview

Squeeze pins are precision-actuated components integrated into die-casting tooling. During the solidification phase, they are mechanically pressed into selected areas of the casting cavity to apply localized pressure, effectively reducing shrinkage porosity and improving microstructural integrity and mechanical strength. These pins are guided by squeeze sleeves, which ensure precise alignment and reliable operation.

Squeeze Pins & Sleeves

Key Features

Localized Pressure Application
Activated once the mold is filled, squeeze pins precisely target areas prone to shrinkage porosity, feeding material into hot spots and improving overall casting quality.
Optimized Timing & Stroke Control
Both the timing (delay from cavity fill) and stroke (depth of insertion) of the squeeze pin are critical. Adjustments here directly impact the resulting microstructure and tensile properties, enabling up to 50% improvement in mechanical strength.
Simulation-Friendly Design
Modern casting simulations (e.g., with FLOW-3D CAST) enable optimization of squeeze pin placement and activation timing—effectively reducing shrinkage defects before physical trials
Sleeve-Guided Reinforcement
Squeeze sleeves guide the pins into the cavity and can include tapered designs to compensate for thermal expansion—maintaining functional clearance and preventing pin jamming under high-temperature conditions.
Advanced Control Mechanisms
Patented control systems use hydraulic flow-rate monitoring (from the back-pressure side) to accurately measure and control pin stroke—correcting for variables like hose expansion or oil leakage and ensuring consistent pin performance.