Most capping problems are not “capper problems”. They are cap + bottle + torque + infeed stability problems.
Start With Cap Type and Closure Requirement
- Plastic screw caps: torque-controlled spindle capper
- ROPP/aluminum caps: roll-on capper with forming heads
- Press-on caps: press capper with stable positioning
- Pump/spray triggers: pick-and-place + torque control
Key Decision Factors
- Output target and number of capping heads
- Torque window and verification method
- Bottle stability and neck finish tolerance
- Cap feeding method (elevator, bowl, sorter)
- Integration with induction sealing, labeling, and inspection
What to Send for a Fast Assessment
- Bottle drawing or photos + neck finish
- Cap specs (type, diameter, liner)
- Target output (bottles/min)
- Product category (food/cosmetic/chemical)
- Available footprint and conveyor height
Inputs we need for an accurate sourcing assessment
- Product state and behavior (powder flowability, viscosity, particulates, temperature)
- Package format and size range (bag/bottle/jar; material and seal type)
- Fill range and target tolerance (e.g., 100–500 g, ±1–2 g)
- Target output (units/min or hr) and expected runtime per day
- Local utilities (voltage/phase/frequency, compressed air, clean-room/hygiene level)
- Photos or sample pack + label requirements (if any)
Common failure points (what usually goes wrong)
- Filler choice not matching product behavior (bridging, foaming, shear sensitivity)
- Poor dust control contaminating seals (powders)
- Unstable feeding causing speed fluctuations and weight drift
- Bag material/seal spec not compatible with sealing temperature or contamination
- Underestimating footprint and maintenance access space
FAT acceptance test checklist
- Run with your product or a confirmed substitute and record output stability
- Check weight accuracy vs tolerance at different speeds
- Verify sealing integrity (leak test / visual inspection) across a full shift simulation
- Confirm safety, emergency stop, guards, and basic alarms
- Capture test video and final configuration list for handover
Frequently Asked Questions
Do I need torque testing?
If you have leak issues or downstream customer complaints, torque testing is strongly recommended.
What causes cross-threading?
Unstable bottle positioning, misaligned cap feed, and neck finish variation are common causes.
Can you integrate capper + filler + labeler?
Yes. We define infeed, spacing, sensors, and handshakes for stable line operation.
Do pump caps need special handling?
Yes. They typically require pick-and-place or special cap feeding and controlled torque.