Step-by-Step Guide: Testing Bottle Cap Torque
A practical tutorial on using the NLY-20A to verify opening torque on beverage and pharmaceutical bottles.
Why Routine Testing Matters
A consistent torque value is the bridge between a leak-free product and a happy customer. Variations in material batches, temperature, or capping machine wear can drift torque values out of spec. Here is how to verify them using the NLY-20A.
Equipment Setup
Required:
• NLY-20A Digital Torque Tester
• Sample Bottles (Finished goods)
• Power Supply (AC 220V or 110V)
Step-by-Step Procedure
Step 1: Mount the Sample
Place the bottle on the center of the base. Loosen the 4 clamping knobs, slide the posts to touch the bottle, and tighten them evenly.
Tip: Ensure the bottle is vertical and not tilted.
Step 2: System Zeroing
Tap the "Zero" button on the touch screen to clear any weight or handling force values.
Step 3: Select Parameters
Go to the "Parameter" menu. Select "Opening Force" mode. Set your Upper/Lower limits (e.g., 1.0 Nm - 2.5 Nm) for automatic Pass/Fail judgment.
Step 4: Perform the Test
Grip the cap firmly by hand (or use a specialized chuck). Twist the cap counter-clockwise (for standard threads) smoothly and steadily.
Note: Do not jerk the cap. A steady motion ensures the peak value is accurate.
Step 5: Analyze Results
The screen will hold the "Peak" value.
• Green: Within spec.
• Red/Yellow: Out of spec (Too tight/Too loose).
Step 6: Data Recording
Press "Print" to generate a ticket or "Save" to store it in the internal memory (up to 200 groups).
Common Mistakes to Avoid
Conclusion
Regular spot checks (e.g., 5 bottles every hour) using the NLY-20A give you the data needed to catch capping machine drift before it becomes a customer complaint.
