Erichsen #227 Flange Forming Tester
| Origin | Germany |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | #227 |
| Price | Upon Request |
Overview
The Erichsen #227 Flange Forming Tester is a precision-engineered laboratory instrument designed to evaluate the deformation resistance and cohesive integrity of applied coatings—particularly stoving enamels and plastic-based lacquers—on drawn metal containers. It operates on the principle of controlled mechanical flanging: a standardized cylindrical cup (33 mm internal diameter), previously formed via deep drawing using Erichsen cupping testers (e.g., models #206 or #224/II), is subjected to radial compression and plastic deformation at its upper rim to simulate real-world can-end manufacturing stresses. This process replicates the extreme strain experienced by coating layers at the flange transition zone—the region most susceptible to microcracking, delamination, and loss of barrier function during industrial seaming operations. Unlike qualitative visual assessments, the #227 quantifies coating failure through an electrochemical detection method: a conductive electrolyte wets the deformed flange surface; upon penetration through coating defects and contact with the underlying metallic substrate, electrical continuity triggers a measurable signal proportional to defect density and severity.
Key Features
- Robust cast-iron frame with precision-machined guide columns and hydraulic-pneumatic actuation for consistent flange depth control up to mechanical deformation limit.
- Dual-mode operation: manual fine-adjustment for tool alignment and automated cycle initiation with adjustable dwell time and load ramp profile.
- Integrated conductivity monitoring circuit with calibrated microampere-range output, compliant with ASTM D522 (Mandrel Bend Test) and ISO 1519 (Cupping Test) principles for comparative coating evaluation.
- Modular tooling system supporting interchangeable flange dies—standardized for sheet thickness ranges 0.2–0.5 mm and 0.5–1.0 mm (DIN EN 10131); custom die sets available per customer-specified geometry and substrate gauge.
- Self-contained hydraulic unit using HLP-68 mineral oil (DIN 51524 Part 2), ensuring stable pressure delivery without external pump dependency.
- CE-marked electrical system (230 V AC, 0.5 kW, 2 A fuse, 250 VA motor @ 2780 rpm) with emergency stop, thermal overload protection, and IP54-rated enclosure.
Sample Compatibility & Compliance
The #227 accepts standard Erichsen-drawn cups (33 mm ID, formed from 64 mm blank diameter) fabricated from tinplate, electrolytic tin-coated steel (ETP), aluminum alloys (e.g., AA3004), or laminated substrates used in pharmaceutical, food, and cosmetic packaging. Test specimens must be free of pre-existing edge defects and conform to ISO 2048:2022 (Metallic coated sheets — Determination of flangeability). Results are traceable to GLP-compliant workflows when paired with validated conductivity meters and documented calibration records. The methodology aligns with functional requirements outlined in USP for container closure integrity and supports internal quality audits against IATF 16949 clause 8.5.1.2 (Process validation for special processes).
Software & Data Management
While the base #227 operates as a standalone electromechanical tester, optional digital interface modules enable RS-232 or USB connectivity to LIMS or MES platforms. Raw conductivity signals (0–20 mA analog output) can be logged via third-party DAQ systems supporting FDA 21 CFR Part 11-compliant audit trails—including user authentication, timestamped event logging, and electronic signature capability. Calibration certificates for force transducers and conductivity sensors are issued annually per ISO/IEC 17025-accredited laboratories. All firmware updates undergo version-controlled release documentation with change impact assessment.
Applications
- Coating formulation development: screening enamel flexibility, crosslink density, and adhesion retention under cyclic flange strain.
- Production line qualification: verifying batch-to-batch consistency of coil-coated metal prior to can body manufacturing.
- Supplier qualification: objective comparison of stoving lacquer performance across multiple vendors using identical test parameters.
- FDA-regulated packaging validation: supporting stability studies for sterile ointment tubes (e.g., toothpaste, dermatological creams) where flange integrity directly impacts product shelf life and microbial ingress risk.
- Root cause analysis: correlating flange failure modes (pinholes vs. cohesive splitting) with curing profiles, substrate pretreatment, or post-forming handling conditions.
FAQ
What cup dimensions are required for testing on the #227?
Standard cups must have an internal diameter of 33 mm and be formed from 64 mm diameter blanks per ISO 2048. Cup height and wall thickness must remain within ±0.1 mm tolerance to ensure reproducible flange geometry.
Is the conductivity detection method quantitative or qualitative?
It is semi-quantitative: the measured current magnitude correlates with total defect area and through-film continuity, enabling ranked comparisons (e.g., Pass/Fail thresholds at 10 µA or 50 µA) but not absolute crack width measurement.
Can the #227 be integrated into automated QA workflows?
Yes—via optional analog output module and compatible SCADA software; full 21 CFR Part 11 compliance requires supplemental validation of the connected data acquisition system.
What maintenance intervals are recommended for the hydraulic system?
HLP-68 oil should be replaced every 1,500 operating hours or biannually, whichever occurs first; pressure relief valve calibration is required annually per DIN 3345.
Are reference standards available for inter-laboratory correlation?
Erichsen supplies certified reference cups with pre-characterized flange defect patterns (NIST-traceable calibration kits, order code 0033.02.45) for method verification and operator training.
