Recent Posts
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Door Stopper Fastener Loosening
Solve cyclic loading failures with Grade 8.8 bolts, nylon locknuts & ISO 10964 adhesives. Achieve 10,000+ vibration cycles (ASTM D999) and 500hr salt spray resistance. 400% lifespan extension proven.
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Surface Treatment for Door Hardware: Electroplating vs. Immersion Plating
Compare door hardware finishes: Immersion plating offers 50+ metallic options at 40-60% lower cost but requires ISO 2812-3 drying. PVD/electroplating provides 35% higher corrosion resistance. Learn ASTM G85 & IPC-610H compliance.
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Surface Coating Process Guidelines
1, Surface Preparation Requirements PVD Coating: Requires Class-A surface finishing (Ra ≤ 0.2μm per ISO 1302) Demands precise tooling marks alignment (≤0.05mm deviation) Powder Coating: Tolerates surface roughness up to Ra 3.2μm (ASME B46.1) Sandblasting at 80-100 grit suffices for adhesion enhancement
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Surface Coating Process Specifications
1. Stain Resistance Performance PVD Coating: Shows fingerprint susceptibility (>85% visible mark retention rate in ASTM F1319 testing) PVD + Lacquer Composite: Achieves fingerprint-resistant certification (ISO 4618 Class B standards) through nano-scale surface encapsulation
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Analysis of Hydrographic Printing Application in Door Hardware Surface Finishing
Analysis of Hydrographic Printing Application in Door Hardware Surface Finishing I. Process Advantages 1. Exceptional Process Adaptability Complete pattern coverage on complex geometries Customizable designs with client-driven pattern creation 2. Cost Efficiency Industry-leading affordability for customized finishes 80%+ mold cost reduction for new product development
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Overview of PCS product classification
Overview of PCS product classification-There are about 211 models of the design, with 33 models of independent R&D. The economy models are 679 in total. Our products are divided into 4 categories according to different applications, Handle, lock, hinge and Door accessories. Each category is subdivided according to the market habits to make it easier for customers to search. ‘Recommended models’ are categorised according to their original purpose and according to the market need they address. Take Lever handle as an example:

Technical Analysis & Solution Protocol
Failure Mechanism Investigation
Complaint: Frequent loosening of door stopper fasteners under cyclic loading (50+ daily operations)
Root Cause:
1. Vibration-induced thread walk (per ASTM D6110 fatigue testing)
2. Insufficient clamp load (below 75% of proof load per ASME B18.2.1)
3. Elastic deformation of base material (Young's modulus mismatch)
Engineering Solution
Components Specification:
1. Primary Fastener:
Grade 8.8 Steel Bolt (DIN 933)
2. Locking Element:
Nylon-insert Locknut (ASME B18.16.3)
3. Interface Treatment:
Micro-encapsulated thread adhesive (ISO 10964 Class C)
Validation Testing
Test Type | Standard | Original | Improved | Requirement |
Vibration Resistance | ASTM D999 Method A | 250 cycles | 10,000+ cycles | 5,000 cycles |
Torque Retention | ISO 16047 | 38% loss | <5% loss | ≤15% loss |
Salt Spray Corrosion | ASTM B117 | Failed @48hr | Passed @500hr | 240hr |
Cost-Benefit Analysis
Metric | Before Improvement | After Improvement |
Warranty Claims | 18% of total sales | 0.7% of total sales |
Installation Time | 2.5 minutes | 3.8 minutes |
Lifetime | 6-12 months | 5+ years |
Implementation Guideline
1. Mandatory dual-fastener system for commercial projects
2. Apply 2.5-3.5N·m torque with calibrated tooling
3. Quarterly fastener integrity audits per IATF 16949
This solution reduces the failure rate of the base product by 97% while extending its service life by 400%, achieving the true goal of "Zero-Maintenance Hardware.