Core Body: Permeability 80-150 AFS

Component Specifications

Definition

The core body is a precision-engineered component of a metal casting mold system, typically made from refractory materials, that forms the internal voids, undercuts, and intricate features of cast metal products. It is inserted into the mold cavity before pouring molten metal, withstands high temperatures and metallostatic pressure, and is removed after solidification to create hollow sections or complex internal structures that cannot be formed by the mold alone.

Working Principle

The core body operates by being precisely positioned within the mold cavity to displace molten metal during pouring, creating negative spaces in the final casting. It must maintain dimensional stability under thermal stress, resist metal penetration, and allow for proper venting of gases. After solidification, the core is mechanically broken down or chemically dissolved to be removed from the casting.

Materials

Typically made from silica sand bonded with organic resins (phenolic, furan) or inorganic binders (sodium silicate, phosphate), or from ceramic materials for high-temperature applications. Advanced cores may use 3D-printed sand or soluble ceramic materials.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Permeability	80-150 AFS
Surface Finish	Ra 3.2-12.5 μm
Thermal Stability	Up to 1600°C for ceramic cores
Compressive Strength	1.5-4.0 MPa
Dimensional Tolerance	±0.1-0.5 mm depending on size

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

Standards

ISO 8062, DIN 1681, ASTM B611

Parent Products

This component is used in the following industrial products

Metal Casting Mold Core

A metal casting mold core is a precision-machined component used as a removable insert in casting molds to form internal cavities, channels, or complex geometries in cast metal products.

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Engineering Analysis

Risks & Mitigation

Core shift during pouring
Incomplete core removal
Gas entrapment
Metal penetration
Thermal cracking of core

FMEA Triads

Trigger: Inadequate core support or improper positioning
Failure: Core shift leading to dimensional inaccuracies
Mitigation: Use precise core prints, chaplets, and verification fixtures

Trigger: Insufficient core strength or improper handling
Failure: Core breakage during mold assembly or pouring
Mitigation: Optimize binder content, implement proper handling procedures, use core reinforcements

Trigger: Poor venting design or excessive binder content
Failure: Gas defects (blows, pinholes) in casting
Mitigation: Design adequate vent channels, control binder ratios, apply proper core coatings

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 8062 Geometric tolerancing for castings, Class CT6-CT10 depending on application

Test Method

Dimensional verification using CMM, strength testing per ASTM C133, permeability testing per AFS standards

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Core Body

Manufacturer profiles associated with Core Body.

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Frequently Asked Questions

What is the difference between a core body and a mold cavity?

The mold cavity forms the external shape of the casting, while the core body creates internal features, holes, and passages that cannot be formed by the mold alone.

How are core bodies removed from castings?

Core bodies are typically removed through mechanical knockout (shaking/vibrating), thermal decomposition (burning out organic binders), or chemical dissolution (using water-soluble or acid-soluble materials).

What causes core-related casting defects?

Common defects include core shift (misalignment), core breakage, gas defects from inadequate venting, and metal penetration into the core surface due to insufficient density or coating.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Core Body