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【Scope of application】

It is used to make various yarns on the standard blackboard to inspect and evaluate the appearance quality of the yarns.

【Related standards】

GB9996 etc.

【technical parameter】

1. Blackboard specifications: 250×180×2.5mm; 250×220×2.5mm

2. Rotating yarn density: GB9996 standard six densities, namely 7, 9, 11, 13, 15, 19 yarns/cm and GB403-78 standard densities total seven densities

3. Pre-tensioning method: grading weight method

4. Blackboard speed: 200～400r/min steplessly adjustable

5. Power of the whole machine: ≤50W

6. Power source: Ac220V 50Hz

7. Dimensions: length×width×height=720×480×250mm

【Standards compliant】

GB9996-1988 Blackboard Inspection Method for Appearance Quality of Cotton and Chemical Fiber Pure Spinning Yarn