Ejector System for Die Sets | Industrial Component Directory

Product Specifications

Technical details and manufacturing context for Ejector System

Definition

The ejector system is a critical component of a die set that facilitates the removal of finished parts from the die cavity. It operates after the forming cycle (e.g., injection molding, stamping, forging) is complete, using pins, sleeves, or blades to push or lift the part from the mold or die surfaces, ensuring proper part release and preventing damage to the part or the tooling. This directory entry covers ejector systems used in fabricated metal product manufacturing, where they are integrated into dies for stamping, forging, or similar processes. The system typically consists of an ejector plate, ejector pins, guide bushings, and a return mechanism. The ejector plate is driven by the machine's ejector rod or a hydraulic/mechanical mechanism, moving forward to push the pins through guide holes in the die. The pins contact the formed part and apply force to dislodge it from the core or cavity. After ejection, the system retracts before the next cycle begins. Key parameters for selection include ejector stroke (25–100 mm), ejector force (50–200 kN), operating pressure (1.0–1.6 MPa), cylinder diameter (32–100 mm), ejector speed (50–200 mm/s), positioning accuracy (±0.05 mm), operating temperature (-20 to 80°C), ingress protection (IP54–IP65 per IEC 60529), material grade (40Cr–42CrMo per GB/T 3077), surface hardness (50–60 HRC), and weight (15–60 kg). These values are reference ranges and must be verified for the specific model and application. The system is designed for use with tool steel or alloy steel components. For proper operation, the ejector stroke must exceed part depth, and insufficient ejector force can cause part sticking. Seals degrade above 80°C, and higher ingress protection is recommended for dusty environments. Surface hardness below 50 HRC leads to rapid wear. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The ejector system is activated by the opening stroke of the press or molding machine. As the die halves separate, an ejector plate, driven by the machine's ejector rod or a hydraulic/mechanical mechanism, moves forward. This plate pushes ejector pins through guide holes in the die. The pins make contact with the formed part and apply force to dislodge it from the core or cavity. The system then retracts before the next cycle begins. The ejector stroke must exceed the part depth to ensure full ejection, and the ejector force must be sufficient to overcome any sticking forces. The operating pressure, cylinder diameter, and ejector speed are interrelated parameters that determine the ejection performance. Positioning accuracy is critical for thin-wall parts to avoid damage. The system operates within a specified temperature range, and its ingress protection rating indicates suitability for dusty environments.

Common Materials

Tool Steel, Alloy Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Ejector Stroke	25–100 mm	Must exceed part depth for full ejection
Ejector Force	50–200 kN	Insufficient force causes part sticking
Operating Pressure	1.0–1.6 MPa
Cylinder Diameter	32–100 mm	Determines force at given pressure
Ejector Speed	50–200 mm/s	Too high may damage part
Positioning Accuracy	±0.05 mm	Critical for thin-wall parts
Operating Temperature	-20–80 °C	Seals degrade above 80°C
Ingress Protection	IP54–IP65	Higher IP for dusty environmentsIEC 60529
Material Grade	40Cr–42CrMo	Hardened for wear resistanceGB/T 3077
Surface Hardness	50–60 HRC	Below 50 HRC wears quickly
Weight	15–60 kg	Affects handling and installation

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Ejector Pin Part
Directly contacts and pushes the molded/stamped part out of the die cavity.

Material: Tool Steel
Ejector Plate Part
Holds the ejector pins and transmits the ejection force from the machine to the pins.

Material: Alloy Steel
Return Pin Part
Ensures the ejector plate retracts to its starting position before the next cycle.

Material: Tool Steel
Ejector Cylinder Optional
Drives the ejector plate on machines that do not push it with their own ejector rod.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Die Set

View system integration details

Manufacturers of Ejector System

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Frequently Asked Questions

What is the typical ejector stroke range for this system?

The reference range for ejector stroke is 25–100 mm. It must exceed the part depth to ensure full ejection. Confirm the exact stroke required for your specific die and part geometry with the manufacturer.

What ejector force is needed to prevent part sticking?

The reference range for ejector force is 50–200 kN. Insufficient force can cause parts to stick in the die. The required force depends on part material, geometry, and surface area. Verify with the supplier for your application.

What operating pressure is recommended?

The reference operating pressure is 1.0–1.6 MPa. Confirm the pressure rating of your system and ensure it matches your machine's capabilities.

What is the operating temperature limit?

The reference operating temperature range is -20 to 80°C. Seals may degrade above 80°C. For higher temperature applications, consult the manufacturer for suitable seal materials.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 100 bar (hydraulic actuated systems)
other spec:	Stroke length: 10-500 mm, Cycle rate: Up to 120 cycles/min, Force capacity: 1-50 kN
temperature:	-20°C to 200°C (typical for standard seals/materials)

Ejector System

Product Specifications

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