---
title: "Squeegee Assembly"
industry: "Computer, Electronic and Optical Product Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SQUEEGEE_ASSEMBLY"
  data_integrity_hash: "5270b85d81158212641c04a2609f37ad"
  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:SQUEEGEE_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/squeegee-assembly.md"
  official_resource_url: "https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/squeegee-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-3.0 N/mm² contact pressure, 10-100 mm/s linear velocity, 45-75° blade angle"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.5
    unit: "N"
    consequence: "Yield strength threshold of 316L stainless steel (205 MPa) exceeded under excessive pressure; Bingham plastic behavior of solder paste (yield stress 150-300 Pa) requires minimum shear rate; contact angle hysteresis exceeding 30° disrupts paste transfer"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Abrasive wear from solder paste particles (Mohs hardness 3.5-4.0)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Diamond-like carbon coating (hardness 20-40 GPa) with 5 μm thickness"
  - node_2:
      trigger: "Cyclic loading at 0.5 Hz frequency during printing cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Finite element analysis-optimized fillet radius of 2.0 mm at stress concentration points"
bom_nodes:
  squeegee-blade:
    type: "component"
    urn: "URN:CNFX:ME:SQUEEGEE_BLADE"
    interface_type: "physical-logic-coupled"
  blade-holder:
    type: "part"
    urn: "URN:CNFX:ME:BLADE_HOLDER"
    interface_type: "physical-logic-coupled"
  mounting-bracket:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_BRACKET"
    interface_type: "physical-logic-coupled"
  pressure-adjustment-mechanism:
    type: "part"
    urn: "URN:CNFX:ME:PRESSURE_ADJUSTMENT_MECHANISM"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ISEA 105-2016 - HAND PROTECTION SELECTION CRITERIA"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - DIRECTIVE 2006/42/EC (MACHINERY SAFETY)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/squeegee-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "4eaeaff828f6716908905ea14d3c7d1b7deb536540b7c4d55fc18dabcf6ae6b3"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Squeegee Assembly

## 1. Technical Definition
A critical component in solder paste printing that spreads and deposits solder paste onto printed circuit boards through controlled blade movement.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-3.0 N/mm² contact pressure, 10-100 mm/s linear velocity, 45-75° blade angle**. Failure boundary: **Contact pressure exceeding 3.5 N/mm² causes permanent blade deformation, velocity below 5 mm/s results in paste starvation, blade angle beyond 80° induces paste rollover**, Mechanism: **Yield strength threshold of 316L stainless steel (205 MPa) exceeded under excessive pressure; Bingham plastic behavior of solder paste (yield stress 150-300 Pa) requires minimum shear rate; contact angle hysteresis exceeding 30° disrupts paste transfer**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Abrasive wear from solder paste particles (Mohs hardness 3.5-4.0) | 8 | Blade edge radius increase beyond 25 μm tolerance | Diamond-like carbon coating (hardness 20-40 GPa) with 5 μm thickness |
| Cyclic loading at 0.5 Hz frequency during printing cycles | 8 | Fatigue crack initiation at blade mounting holes after 1×10⁶ cycles | Finite element analysis-optimized fillet radius of 2.0 mm at stress concentration points |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Blade Holder](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/blade-holder.md) `(Standalone System)`
- [Pressure Adjustment Mechanism](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pressure-adjustment-mechanism.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Solder Paste Printer**, **Stencil Cleaning System**, **Solder Paste Inspection System**  
**Downstream Applications**: Printed Circuit Boards, Electronic Assemblies, Optical Device Components  

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

### Q: What materials are used in this squeegee assembly and why?
**A**: This assembly uses polyurethane blades for optimal solder paste release and durability, stainless steel for structural components requiring strength, and aluminum alloy for lightweight mounting brackets. This combination ensures precise paste deposition while withstanding industrial cleaning processes.

### Q: How does the pressure adjustment mechanism improve PCB manufacturing?
**A**: The pressure adjustment mechanism allows operators to fine-tune blade pressure for consistent solder paste deposition across different PCB designs and stencil thicknesses. This ensures proper paste volume transfer, reduces bridging or insufficient paste issues, and improves first-pass yield rates in electronic assembly.

### Q: What maintenance is required for squeegee assemblies in continuous operation?
**A**: Regular inspection and cleaning of polyurethane blades to prevent paste buildup, periodic lubrication of moving parts in the pressure mechanism, and checking mounting bracket alignment. Blades typically require replacement after 50,000-100,000 cycles depending on paste abrasiveness and operating conditions.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- ANSI/ISEA 105-2016 - HAND PROTECTION SELECTION CRITERIA
- CE MARKING - DIRECTIVE 2006/42/EC (MACHINERY SAFETY)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Squeegee Assembly](https://cnfx.com/industry/computer-electronic-and-optical-product-manufacturing/product/squeegee-assembly)**

### 🌐 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**: SQUEEGEE_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: d832498c
