---
title: "Ejection Mechanism"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:EJECTION_MECHANISM"
  data_integrity_hash: "30729aca87b6f0e4e1b4f9afb4f54c64"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:EJECTION_MECHANISM"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ejection-mechanism.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/ejection-mechanism"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "15-25 MPa hydraulic pressure, 0.5-2.0 mm/s ejection velocity, 150-250°C die temperature"
    unit: "kN"
engineering_limits:
  max_safe_operating_point:
    value: 30
    unit: "MPa"
    consequence: "Hydraulic seal failure due to pressure exceeding yield strength of EPDM rubber (15 MPa), incomplete ejection from insufficient kinetic energy transfer (F=ma), casting adhesion from thermal contraction mismatch between aluminum (23.1×10⁻⁶/K) and H13 tool steel (11.5×10⁻⁶/K)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install 3 μm absolute filtration with differential pressure monitoring and automatic bypass"
  - node_2:
      trigger: "Ejector pin misalignment exceeding 0.05 mm perpendicular tolerance"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Precision ground pins with 0.01 mm diameter tolerance and tapered lead-in geometry"
bom_nodes:
  ejector-plate:
    type: "component"
    urn: "URN:CNFX:ME:EJECTOR_PLATE"
    interface_type: "physical-logic-coupled"
  ejector-pins:
    type: "component"
    urn: "URN:CNFX:ME:EJECTOR_PINS"
    interface_type: "physical-logic-coupled"
  return-pins:
    type: "component"
    urn: "URN:CNFX:ME:RETURN_PINS"
    interface_type: "physical-logic-coupled"
  hydraulicpneumatic-cylinder:
    type: "part"
    urn: "URN:CNFX:ME:HYDRAULICPNEUMATIC_CYLINDER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/ejection-mechanism.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "115e081e4a5ca2b5ac53ccb5ea7141e48eac3dd99c4ec693c7194900a2c33b8a"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Ejection Mechanism

## 1. Technical Definition
A mechanical system that removes solidified castings from the die cavity after the high-pressure die casting process.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **15-25 MPa hydraulic pressure, 0.5-2.0 mm/s ejection velocity, 150-250°C die temperature**. Failure boundary: **Hydraulic pressure exceeding 30 MPa causes seal rupture, velocity below 0.3 mm/s results in incomplete ejection, die temperature below 120°C leads to casting adhesion**, Mechanism: **Hydraulic seal failure due to pressure exceeding yield strength of EPDM rubber (15 MPa), incomplete ejection from insufficient kinetic energy transfer (F=ma), casting adhesion from thermal contraction mismatch between aluminum (23.1×10⁻⁶/K) and H13 tool steel (11.5×10⁻⁶/K)**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level | 8 | Spool valve stiction causing delayed ejection timing | Install 3 μm absolute filtration with differential pressure monitoring and automatic bypass |
| Ejector pin misalignment exceeding 0.05 mm perpendicular tolerance | 8 | Asymmetric loading causing pin bending stress exceeding 600 MPa yield strength | Precision ground pins with 0.01 mm diameter tolerance and tapered lead-in geometry |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | kN | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Hydraulic/Pneumatic Cylinder](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hydraulicpneumatic-cylinder.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **High-Pressure Die Casting Machine**, **Industrial Cooling System**, **Automated Conveyor System**  
**Downstream Applications**: Automotive Engine Blocks, Aerospace Structural Components, Industrial Pump Housings  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in ejection mechanisms for durability?
**A**: Our ejection mechanisms use premium tool steel and alloy steel components for maximum durability in high-pressure die casting environments, ensuring long service life and consistent performance.

### Q: How does the ejection mechanism work in die casting?
**A**: After molten metal solidifies in the die cavity, hydraulic or pneumatic cylinders activate the ejector plate, which pushes ejector pins against the casting to remove it cleanly, while return pins reset the system for the next cycle.

### Q: What maintenance do ejection mechanisms require?
**A**: Regular inspection of ejector pins for wear, lubrication of moving parts, and checking hydraulic/pneumatic systems for leaks ensures optimal performance and prevents downtime in manufacturing operations.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Ejection Mechanism](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/ejection-mechanism)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: EJECTION_MECHANISM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 5cc62622
