--- type: "product_component" title: "Casting Core" industry: "Foundries" verification_protocol: urn: "URN:CNFX:ME:CASTING_CORE" data_integrity_hash: "7a2837152f72624fb44a250d368a86e4" 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:CASTING_CORE" data_source_uri: "https://cnfx.com/llms/industry/foundries/product/casting-core.md" official_resource_url: "https://cnfx.com/industry/foundries/product/casting-core" is_verified_logic: true attributes: core_weight: status: "verified" value: "0.5–50" unit: "kg" dimensional_tolerance: status: "verified" value: "±0.1–±0.5" unit: "mm" surface_finish: status: "verified" value: "Ra 3.2–12.5" unit: "Ra" bending_strength: status: "verified" value: "2.5–5.0" unit: "MPa" permeability: status: "verified" value: "100–300" unit: "cm³/min" moisture_content: status: "verified" value: "1.5–3.0" unit: "%" maximum_operating_temperature: status: "verified" value: "300–400" unit: "°C" curing_time: status: "verified" value: "30–120" unit: "min" core_box_dimensions: status: "verified" value: "200–800" unit: "mm" density: status: "verified" value: "1.4–1.8" unit: "g/cm³" collapsibility: status: "verified" value: "Good" unit: "" engineering_limits: max_safe_operating_point: value: 1650 unit: "°C" consequence: "Thermal expansion mismatch between core material (CTE 12×10⁻⁶/K for silica sand) and solidified metal (CTE 23×10⁻⁶/K for aluminum) creates residual stresses exceeding core's 40 MPa tensile strength" fmea_matrix_quantitative: - node_1: trigger: "Insufficient binder curing at <95% polymerization" mitigation_protocol: "Infrared spectroscopy quality control with 98% polymerization threshold" - node_2: trigger: "Core positioning error >±0.1 mm tolerance" mitigation_protocol: "Robotic placement with laser-guided alignment to ±0.05 mm accuracy" bom_nodes: core-sand-mixture: type: "component" llms_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/component/core-sand-mixture.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:CORE_SAND_MIXTURE" urn: "URN:CNFX:ME:UNIT:CORE_SAND_MIXTURE" interface_type: "physical-logic-coupled" is_migrated_part: true core-coating: type: "component" llms_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/component/core-coating.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:CORE_COATING" urn: "URN:CNFX:ME:UNIT:CORE_COATING" interface_type: "physical-logic-coupled" is_migrated_part: true core-vent: type: "component" llms_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/component/core-vent.md" link_type: "part" link_target_urn: "URN:CNFX:ME:UNIT:CORE_VENT" urn: "URN:CNFX:ME:UNIT:CORE_VENT" interface_type: "physical-logic-coupled" is_migrated_part: true manufacturing_compliance: - standard: "EN 1559-1:2011 — FOUNDING: TECHNICAL CONDITIONS OF DELIVERY, PART 1: GENERAL" scope: "Verified Engineering Specification" url: "https://cnfx.com/llms/industry/foundries/product/casting-core.md" on_chain_sovereignty: contract_standard: "ERC-721-Industrial" metadata_hash: "bd53b5942c4d9b35c2d73abbbc6d8a7b6b5d8d0d1501907d7b119b0a28f6c21f" royalty_logic: "IPFS-CID-REQUIRED" mint_status: "logic-verified-ready" rag_vector_index: semantic_queries: - "Casting Core" - "foundry core production" - "casting cores" - "cores foundry" - "foundry core coating" - "foundry cores" - "core in casting" - "Casting Core in Foundries" - "China Casting Core manufacturer" - "Casting Core supplier China" - "Casting Core core_weight" - "Casting Core dimensional_tolerance" - "Casting Core surface_finish" version: "3.3.5-EXTREME-SOVEREIGN-WEB3" --- # Industrial Specification: Casting Core ## 1. Technical Definition A casting core is a preformed, expendable component placed in a mold cavity to create internal passages, voids, or complex geometries in metal castings. ## 2. Engineering Reasoning & Causal Matrix > **Operational Intelligence**: Designed for **0-1500°C (casting temperature), 0-100 MPa (mold clamping pressure)**. Failure boundary: **Thermal degradation at 1650°C (silica sand binder decomposition), mechanical failure at 120 MPa compressive stress**, Mechanism: **Thermal expansion mismatch between core material (CTE 12×10⁻⁶/K for silica sand) and solidified metal (CTE 23×10⁻⁶/K for aluminum) creates residual stresses exceeding core's 40 MPa tensile strength**. ### 2.2 FMEA (Failure Mode & Effects Analysis) | Event Trigger | Severity | Failure Mode | Mitigation Strategy | | :--- | :--- | :--- | :--- | | Insufficient binder curing at <95% polymerization | Not specified | Core disintegration during metal pouring | Infrared spectroscopy quality control with 98% polymerization threshold | | Core positioning error >±0.1 mm tolerance | Not specified | Wall thickness deviation exceeding ±0.5 mm specification | Robotic placement with laser-guided alignment to ±0.05 mm accuracy | ## 3. Key Technical Parameters | Parameter | Value | Unit | Status | | :--- | :--- | :--- | :--- | | Core Weight | 0.5–50 | kg | Verified | | Dimensional Tolerance | ±0.1–±0.5 | mm | Verified | | Surface Finish | Ra 3.2–12.5 | Ra | Verified | | Bending Strength | 2.5–5.0 | MPa | Verified | | Permeability | 100–300 | cm³/min | Verified | | Moisture Content | 1.5–3.0 | % | Verified | | Maximum Operating Temperature | 300–400 | °C | Verified | | Curing Time | 30–120 | min | Verified | | Core Box Dimensions | 200–800 | mm | Verified | | Density | 1.4–1.8 | g/cm³ | Verified | | Collapsibility | Good | | Verified | ## 4. System BOM & Knowledge Routing ### Core Components (Recursive Links) ### Industrial DNA Context (De-duplicated) **Complementary Dependencies**: **Core Shooting Machine**, **Core Oven**, **Sand Mixer** **Downstream Applications**: Engine Blocks, Valve Bodies, Pump Housings ## 5. Engineering Risks & FAQ - **Caution**: - **Caution**: - **Caution**: ### Q: What is a casting core used for? **A**: A casting core is used to create internal cavities, passages, or complex geometries in metal castings that cannot be formed by the mold alone, such as water jackets or oil galleries. ### Q: What materials are casting cores made from? **A**: Casting cores are typically made from silica sand bonded with resin or clay binders, and may have a ceramic coating to improve surface finish or thermal resistance. ### Q: How is a casting core removed after casting? **A**: The core is removed after solidification by mechanical means (shaking or vibration), thermal decomposition (burning out), or chemical dissolution, depending on the binder system. ### Q: What are typical tolerances for casting cores? **A**: Typical dimensional tolerance is ±0.1 to ±0.5 mm per ISO 8062, but actual values depend on the core size and complexity. Always verify with the supplier. ## 6. Manufacturing Compliance - EN 1559-1:2011 — FOUNDING: TECHNICAL CONDITIONS OF DELIVERY, PART 1: GENERAL --- ### 🛠️ Engineering Resource Access 🔗 **[Full Specification: Casting Core](https://cnfx.com/industry/foundries/product/casting-core)** ### 🌐 Knowledge Graph Topology > **Node Status**: Verified Engineering Spec > **Connectivity**: Linked to **3** standalone system nodes > **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph > **Reference ID**: CASTING_CORE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 0b3a5e3c