How Combinatorial Weighing Drives High-Speed Vertical Bagging
Pairing a 10-, 14-, or 20-head combination weigher above a vertical form-fill-seal (VFFS) machine is the workhorse architecture of bag and pouch packaging lines. Across our automatic packaging lines builds, standard intermittent JT-520 frames produce 10–70 bags/min (60–250 mm bag width, 80–360 mm length, 520 mm max film roll), while high-speed continuous-motion frames reach up to 150 bags/min.
A Z-type bucket elevator lifts product to a vibratory top cone, feeding radial pool and weigh hoppers; the computer evaluates bucket combinations each cycle to hit target weight within fractions of a gram before discharging through the forming collar.
Published Multihead VFFS Line Envelopes
Select weigher head count and VFFS jaw motion according to bag weight and required BPM:
| Configuration Tier | Weigher & Bagger Match | Bag Size Envelope | Published Speed | Power & Air Load |
|---|---|---|---|---|
| Compact Standard Line | 10-Head Weigher + Intermittent VFFS (420/520) | W 60–250 mm; L 80–350 mm | 15–60 bags/min | 4.0–5.5 kW; 0.65 MPa @ 0.4 m³/min |
| Mid-High Confectionery/Snack | 14-Head Dimple Weigher + Servo VFFS (520W) | W 60–250 mm; L 100–350 mm | 40–85 bags/min | 6.0–8.0 kW; 0.65 MPa @ 0.5 m³/min |
| High-Speed Continuous Line | 20-Head Weigher + Box/Continuous VFFS (520VW) | W 60–250 mm; L 50–400 mm | 90–150 bags/min | 8.5–12 kW; 0.7 MPa @ 0.7 m³/min |
| Bulk Large-Format Bagging | 10/14-Head 5L Bucket + 720/1150 VFFS | W 150–550 mm; up to 3–15 kg | 10–45 bags/min | 7.5–11 kW; 0.7 MPa @ 0.8 m³/min |
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Critical Line Integration Checks
- Synchronized Dump Timing: Staggered or collation-chute discharge prevents long product tails from bridging in the forming tube or getting crushed in cross-jaws.
- Contact Surface Tooling: Use smooth SUS304 buckets for dry nuts/grains, and embossed dimple or PTFE-coated hoppers for sticky gummies, jerky, or frozen foods.
- Inline Thermal Transfer & Checkweighing: Mount a TTO date/barcode printer on the film unwind frame and a metal-detector + checkweigher combo on the takeaway incline.
Film & Ceiling Checks Before Ordering
Verify your laminate roll outer diameter, core ID (76 mm standard), eye-mark contrast, and available clear height (typically 3.7–4.3 m with mezzanine).
Submit bag dimensions and target BPM via our Project Brief.
Explore related specifications in Automatic Packaging Lines, Line Configurations & Specs, and submit your container throughput targets via Project Brief.