Unveiling the structure and working principle of the organ-type protective cover

Bellows-Type Protective Covers: Technical Architecture and Operational Mechanisms
Commonly known as accordion guards or pleated covers, these systems are engineered to safeguard industrial equipment and workspaces from environmental contaminants and mechanical hazards. Below is a technical breakdown of their design principles:

I. Structural Composition

1. Exterior Pleated Material

• Material Options:
  • Polyurethane (PU): Shore hardness 85A–95A | Abrasion resistance ≤30mm³ (ISO 4649)
  • PVC Sheet: 1.5–3.0mm thickness | UL94 V-0 flame retardancy
• Key Properties:
  • IP68 ingress protection (IEC 60529)
  • Chemical resistance: pH 1.5–13 (DIN 53505)

2. Internal Reinforcement Framework

• PVC Skeleton:
  • Tensile strength: ≥65 MPa (ASTM D638)
  • Elastic modulus: 3.5 GPa (ISO 527-2)
• Bonding Technology:
  • Thermal adhesion: 160±5°C curing (ISO 8512)
  • Stitched seams: Aramid fiber thread (strength ≥1,200N, DIN 53857)

3. Mounting Systems

II. Operational Principles

1. Contaminant Blockade

• Particulate filtration efficiency: >99.5% @ 10µm (ISO 16890 Class ePM10)
• Fluid penetration resistance: Withstands 10 bar coolant pressure (SAE J1681)

2. Dynamic Motion Adaptability

• Stroke range: 100–8,000mm
• Minimum bend radius: 20mm (ISO 6945 cyclic test ≥500k cycles)
• Speed rating: 4m/s (EN 61882 motion safety compliance)

3. Safety Enhancement

• Impact protection: Absorbs 50J energy (EN 166 high-mass impact test)
• Arc flash rating: CAT 2 (NFPA 70E)

4. Equipment Protection

• Salt spray resistance: >2,000hrs (ASTM B117)
• Service life: 1M+ reciprocating cycles (ISO 9227 accelerated aging)

5. Productivity Optimization

• Maintenance-free operation: 20,000hr MTBF (ISO 18434)
• Production efficiency gain: 25% vs. rigid guards

III. Industry-Specific Compliance

• Automotive: IATF 16949 certified for robotic welding lines
• Aerospace: AMS 2175D grease compatibility
• Medical: USP Class VI compliant variants

Certifications:

• CE 2006/42/EC Machinery Directive
• REACH SVHC <0.01%
• RoHS 2015/863/EU