How to Set ROPP Head - Sealing Roller and Threading Roller?

Setting the Roll-On Pilfer Proof (ROPP) head, specifically the sealing and threading rollers, is a crucial step in ensuring proper capping on bottles. Here's a step-by-step guide on how to set the ROPP head:

1. Understanding the Rollers:

• Threading Roller: This roller creates the threads on the aluminum cap.
• Sealing Roller: This roller seals the cap by rolling the skirt against the bottle neck.

2. Preparation:

• Ensure the machine is stopped, and all power is off for safety.
• Install the correct ROPP head for the cap size you are working with.
• Place an aluminum cap on the bottle to be used for testing.

3. Adjusting the Threading Roller:

• Positioning: The threading roller should be positioned at the right height so it meets the cap's side perfectly without pressing too hard.
• Depth Control: Adjust the threading roller's depth using the adjusting screws or knobs to ensure it engraves the threads properly without over-squeezing or under-threading the cap.
• Rotation: Manually rotate the ROPP head to see how the threading roller interacts with the cap. The threads should form smoothly along the neck of the cap.

4. Adjusting the Sealing Roller:

• Height Setting: The sealing roller should be adjusted to meet the lower edge of the aluminum cap’s skirt.
• Pressure Adjustment: Control the pressure on the sealing roller to roll the skirt of the cap around the neck of the bottle, but avoid crushing or deforming the cap.
• Trial Run: Perform a trial capping with the rollers in place. The sealing roller should create a tight seal without damaging the bottle or cap.

5. Testing the Setup:

• Perform several test runs with bottles and caps to ensure the threading and sealing rollers are properly set.
• Check for consistent capping results, including smooth threading, no cap deformation, and a secure seal.

6. Fine-Tuning:

• If you notice issues such as improper threading or loose caps, fine-tune the position and pressure of both rollers.
• Re-test after each adjustment to get the perfect setup.

Proper adjustment ensures a reliable, consistent capping process, essential for quality control in your packaging line.