INDUSTRY COMPONENT

Inner Skin

Inner skin is a structural sheet metal component forming the interior surface of door panels in industrial machinery.

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Component Specifications

Definition
The inner skin is a precision-formed sheet metal component that serves as the interior structural layer of door panels in industrial machinery. It provides dimensional stability, supports interior insulation or lining materials, and interfaces with hinges, latches, and other door mechanisms. This component is critical for maintaining door geometry, distributing mechanical loads, and ensuring proper sealing when closed.
Working Principle
The inner skin functions as a load-bearing structural element that transfers forces from door operation to the frame while maintaining panel flatness. It works in conjunction with the outer skin to create a rigid sandwich structure, with insulation material often placed between layers. The component's formed features (ribs, flanges, embossments) enhance stiffness and provide attachment points for hardware.
Materials
Cold-rolled steel (CRS) SPCC/SPCD, thickness 0.8-1.5mm; Aluminum alloy 5052-H32, thickness 1.0-2.0mm; Galvanized steel SGCC, thickness 0.7-1.2mm; Stainless steel 304, thickness 0.6-1.0mm for corrosive environments.
Technical Parameters
  • Flatness ≤1.5mm/m²
  • Burr Height ≤0.1mm
  • Surface Roughness Ra ≤ 1.6μm
  • Thickness Tolerance ±0.1mm
  • Corrosion Resistance Salt spray test ≥ 72h (for coated versions)
  • Hole Position Tolerance ±0.2mm
Standards
ISO 2768-m, DIN 6930, ISO 9013, DIN 8580

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Inner Skin.

door inner skin panel interior component sheet metal door part industrial door construction machinery panel component metal fabrication part Inner Skin Inner Skin in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Door Panel

The primary structural and insulating element of an insulated chamber door.

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Insulated Panels

Prefabricated building panels with thermal insulation properties used as wall and roof elements in tunnel housing structures.

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Engineering Analysis

Risks & Mitigation
  • Corrosion in humid environments
  • Fatigue cracking at stress concentration points
  • Dimensional distortion during welding
  • Galvanic corrosion with dissimilar metals
  • Vibration-induced loosening of attachments
FMEA Triads
Trigger: Inadequate corrosion protection
Failure: Progressive rusting reduces structural integrity
Mitigation: Apply appropriate coatings (zinc plating, powder coating), use corrosion-resistant materials, ensure proper drainage
Trigger: Stress concentration at sharp corners
Failure: Fatigue cracking during repeated door operation
Mitigation: Implement generous radii (R≥3t), add reinforcement ribs, optimize material thickness distribution
Trigger: Thermal expansion mismatch with outer skin
Failure: Panel warping or buckling
Mitigation: Use compatible materials, design expansion slots, implement floating attachment points

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Geometric tolerances per ISO 2768-m: linear dimensions ±0.3mm, angular ±1°, flatness 0.3mm per 100mm
Test Method
Dimensional inspection via CMM, flatness measurement with surface plate and dial indicator, corrosion testing per ISO 9227, vibration testing per IEC 60068-2-64

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the primary function of an inner skin in door panels?

The inner skin provides structural rigidity, supports interior materials, maintains dimensional stability, and serves as an attachment surface for door hardware and mechanisms.

How does inner skin thickness affect door performance?

Thicker inner skins increase stiffness and load-bearing capacity but add weight; thinner materials reduce weight but may require additional reinforcement ribs. Optimal thickness balances structural requirements with weight constraints.

Can inner skins be repaired if damaged?

Minor dents can often be straightened, but significant damage typically requires replacement due to compromised structural integrity. Repair welding is possible but may affect dimensional accuracy and corrosion resistance.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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Inner Shell Inner Support Core