---
title: "RAP Feeder"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:RAP_FEEDER"
  data_integrity_hash: "4ec3ae723ab841a5067456363a2943e0"
  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:RAP_FEEDER"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/rap-feeder.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/rap-feeder"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-3.0 MPa (5-30 bar) hydraulic pressure, 0.1-1.5 m/s linear feed velocity"
    unit: "t/h"
engineering_limits:
  max_safe_operating_point:
    value: 2.4
    unit: "MPa"
    consequence: "RAP particle abrasion (Mohs hardness 5-7) causing progressive wear at screw-flight clearance (initial 3-5 mm reduced below 0.5 mm), leading to material bridging and torque overload exceeding 850 N·m"
fmea_matrix_quantitative:
  - node_1:
      trigger: "RAP moisture content exceeding 3% by mass"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrated microwave moisture sensor (2.45 GHz) with automated feed rate reduction to 0.3 m/s when moisture &gt;2.5%"
  - node_2:
      trigger: "Wear plate thickness reduction below 8 mm from initial 15 mm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Embedded ultrasonic thickness sensors (5 MHz) with automatic shutdown at 9 mm remaining thickness"
bom_nodes:
  feed-hopper:
    type: "part"
    urn: "URN:CNFX:ME:FEED_HOPPER"
    interface_type: "physical-logic-coupled"
  conveyor-beltchainscrew:
    type: "part"
    urn: "URN:CNFX:ME:CONVEYOR_BELTCHAINSCREW"
    interface_type: "physical-logic-coupled"
  variable-speed-drive:
    type: "part"
    urn: "URN:CNFX:ME:VARIABLE_SPEED_DRIVE"
    interface_type: "physical-logic-coupled"
  discharge-chute:
    type: "part"
    urn: "URN:CNFX:ME:DISCHARGE_CHUTE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING (MACHINERY DIRECTIVE 2006/42/EC)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/rap-feeder.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "2ecfdae6d3d98789bcefce2463ce53cf62abca92b53290b321dfaf452f251161"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: RAP Feeder

## 1. Technical Definition
A mechanical device that precisely meters and transfers reclaimed asphalt pavement (RAP) material from storage to the mixing or processing unit within a RAP system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-3.0 MPa (5-30 bar) hydraulic pressure, 0.1-1.5 m/s linear feed velocity**. Failure boundary: **Material shear stress exceeding 2.4 MPa at auger-screw interface, hydraulic pressure drop below 0.35 MPa**, Mechanism: **RAP particle abrasion (Mohs hardness 5-7) causing progressive wear at screw-flight clearance (initial 3-5 mm reduced below 0.5 mm), leading to material bridging and torque overload exceeding 850 N·m**.

### 2.1 Analytical Physics Model
Governed by the **Tractive Power & Resistance Model**:

> **Primary Equation**: $P = \frac{F \cdot v}{\eta}$  
> **Engineering Impact**: Ensures motor torque capacity exceeds operational inertia.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| F | Total Tractive Resistance | Engineering Constant |
| v | Belt Speed | Engineering Constant |
| \eta | Efficiency | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| RAP moisture content exceeding 3% by mass | 8 | Material adhesion and compaction in screw flights causing torque spike to 1200 N·m | Integrated microwave moisture sensor (2.45 GHz) with automated feed rate reduction to 0.3 m/s when moisture &gt;2.5% |
| Wear plate thickness reduction below 8 mm from initial 15 mm | 8 | Increased clearance (＞8 mm) causing RAP backflow and feed rate deviation exceeding ±15% | Embedded ultrasonic thickness sensors (5 MHz) with automatic shutdown at 9 mm remaining thickness |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Feed Hopper](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/feed-hopper.md) `(Standalone System)`
- [Conveyor Belt/Chain/Screw](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/conveyor-beltchainscrew.md) `(Standalone System)`
- [Variable Speed Drive](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/variable-speed-drive.md) `(Standalone System)`
- [Discharge Chute](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/discharge-chute.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **RAP Storage Bin**, **Asphalt Mixing Plant**, **Material Conveyor System**  
**Downstream Applications**: Hot Mix Asphalt, Warm Mix Asphalt, Cold Mix Asphalt  

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

### Q: What materials are used in the construction of the RAP Feeder?
**A**: The RAP Feeder is constructed from abrasion-resistant steel to withstand the harsh, abrasive nature of reclaimed asphalt pavement material, ensuring durability and long service life in demanding industrial environments.

### Q: How does the variable speed drive benefit RAP processing?
**A**: The variable speed drive allows precise control over the feed rate of RAP material, enabling operators to optimize the mix ratio with virgin materials, maintain consistent production flow, and adapt to different material characteristics for efficient asphalt recycling.

### Q: What are the main components of the RAP Feeder's BOM?
**A**: Key components include a conveyor belt/chain/screw for material transport, a feed hopper for receiving RAP from storage, a discharge chute for directing material to the mixing unit, and a variable speed drive for controlled metering, ensuring reliable operation within RAP systems.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS
- CE MARKING (MACHINERY DIRECTIVE 2006/42/EC)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: RAP Feeder](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/rap-feeder)**

### 🌐 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**: RAP_FEEDER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 38258d1b
