MingShen Science JCM-2 Coal Crucible Abrading Machine for Gieseler Plastometer Preparation
| Key | Brand: MingShen Science |
|---|---|
| Origin | Henan, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | JCM-2 |
| Power | 120 W |
| Voltage/Frequency | 220 V / 50 Hz |
| Motor Speed | 1400 rpm |
| Dimensions (L×W×H) | 360 mm × 240 mm × 300 mm |
| Weight | 19 kg |
Overview
The MingShen Science JCM-2 Coal Crucible Abrading Machine is a dedicated mechanical preparation device engineered to support standardized Gieseler plastometry testing per ISO 501, ASTM D720, and GB/T 479–2016. It is not a standalone analytical instrument but an essential auxiliary unit designed exclusively for post-test cleaning and surface conditioning of standardized 48 mm inner-diameter coal crucibles used in Gieseler plastometers. The machine operates on a rotational abrading principle: the crucible is securely clamped and rotated at a constant 1400 rpm while manual contact with abrasive media—typically sandpaper-wrapped wooden rods—removes hardened焦质 (semi-coke deposits), oxidized residue, and carbonaceous adhesion from the crucible’s internal cylindrical wall. This step ensures dimensional fidelity, thermal uniformity, and repeatability across successive plastometric runs—critical for accurate determination of plastic layer thickness (X), maximum fluidity (Gieseler fluidity index), and temperature intervals (Y-value). Its robust cast-aluminum frame and direct-coupled induction motor provide stable torque delivery under variable load conditions typical during abrasive cleaning cycles.
Key Features
- Fixed-speed 1400 rpm induction motor delivering consistent rotational energy without speed regulation—optimized for controlled mechanical abrasion without crucible deformation.
- Dedicated crucible mounting assembly featuring a precision-machined base plate and adjustable clamping screw mechanism compatible with standard 48 mm ID Gieseler crucibles (e.g., ASTM D720-compliant stainless steel or alumina crucibles).
- Compact footprint (360 × 240 × 300 mm) and 19 kg mass enabling stable benchtop operation in QC laboratories with limited floor space.
- 120 W power consumption ensures low thermal loading and continuous-duty capability during multi-crucible preparation workflows.
- Electrical safety compliance with IEC 61000-6-3 (EMI emission limits) and IP20 enclosure rating for indoor laboratory environments.
Sample Compatibility & Compliance
The JCM-2 is validated exclusively for use with Gieseler-standard coal crucibles conforming to ISO 501 Annex A and ASTM D720 Section 6.2 specifications (inner diameter: 48.0 ± 0.2 mm; height: ≥ 90 mm; wall thickness ≥ 2.5 mm). It does not accommodate non-standard crucibles, graphite boats, or ash crucibles used in proximate analysis. All cleaning procedures must follow the sequence defined in GB/T 479–2016 Clause 7.3: post-test cooling to ambient temperature prior to abrasion, mandatory use of P120–P180 grit sandpaper, and visual verification of uniform matte finish without scratches or localized wear. The device supports GLP-aligned documentation when integrated into laboratory SOPs for crucible lifecycle tracking—each cleaned crucible may be logged with batch ID, cleaning date, operator, and pre/post-cleaning weight (measured separately on analytical balance).
Software & Data Management
The JCM-2 is a fully mechanical, non-programmable device with no embedded firmware, display interface, or digital connectivity. It requires no software installation, calibration certificates, or cybersecurity configuration. All operational parameters—including runtime per crucible—are manually determined by the operator based on visual inspection of residue removal efficacy. For audit readiness, laboratories are advised to record abrading duration, sandpaper grade used, and crucible identification in paper-based or LIMS-integrated logbooks. No data export, traceability timestamps, or electronic signatures are generated—consistent with its classification as Class II auxiliary equipment under ISO/IEC 17025:2017 Clause 6.4.2.
Applications
- Routine maintenance of Gieseler plastometer crucibles in coal quality control labs serving coking coal suppliers and blast furnace operations.
- Preparation of crucibles for interlaboratory comparison studies requiring strict adherence to ISO 501 repeatability criteria (R ≤ 0.5 mm for X-value, R ≤ 1.0 °C for Y-value).
- Restoration of crucible surface integrity following high-volatility bituminous coal tests where thick semi-coke layers impede heat transfer uniformity.
- Supporting ASTM D720 Method B (manual fluidity determination) by ensuring reproducible crucible wall friction coefficients across test series.
FAQ
Is the JCM-2 compatible with automated Gieseler instruments such as the Carbolite Gero or Parr 1485?
Yes—provided the instrument uses standard 48 mm ID crucibles meeting ISO 501 dimensional tolerances. The JCM-2 does not interface electronically but serves as a universal mechanical prep station.
Can aluminum or ceramic crucibles be abraded using this machine?
Only if they conform to Gieseler geometry and material hardness specifications. Alumina crucibles (≥ 92% Al₂O₃) are approved; soft aluminum crucibles are not recommended due to risk of gouging.
Does the device include sandpaper or wooden rods?
No—abrasive consumables must be sourced separately per GB/T 479–2016 requirements (P120–P180 silicon carbide paper, hardwood rods with 12–15 mm diameter).
What maintenance is required for long-term reliability?
Monthly inspection of motor mounting bolts, cleaning of dust accumulation from ventilation slots, and periodic verification of clamping screw thread integrity. No lubrication of the motor or spindle is required.
Is electrical certification available for EU or North American markets?
CE marking is not provided; users must validate local conformity (e.g., UL 61010-1, UKCA) via third-party assessment. The unit ships with 220 V / 50 Hz configuration only.
