On fresh egg and fruit packaging lines, blister packs are thin, light and smooth-surfaced, so they easily drift off line or wrinkle during high-speed conveying and labeling. Manual placement is slow and cannot ensure label consistency. To address this industry pain point, automatic loading and unloading labeling equipment has become the inevitable choice for line upgrades.
1. Pain points in fresh blister pack labeling and the automation solution
The core cause of poor labeling on fresh-food blister packs is inadequate matching between material properties and the machine. Blister packs are light, so ordinary belt conveying easily lets them vibrate or drift; manual loading and collecting also produce an unstable pace, causing the labeling head to idle or material to pile up. Wanzhi Automation therefore developed the WZ-160 automatic egg carton labeling machine. It uses a robot to pick and separate cartons automatically, with a magazine holding 70 to 100 cartons, and an automatic stacking and collecting mechanism for finished products, achieving unattended continuous operation from loose-stack loading to finished palletizing and eliminating pace fluctuation from manual intervention.
2. Core technology and key parameters
On the core labeling technology, the WZ-160 carries a high-accuracy flat-surface labeling head and a photoelectric tracking system. When a blister pack reaches the labeling station, the photoelectric sensor triggers precisely, holding labeling accuracy within ±1mm and preventing crooked labels or labels overhanging the edge. The machine is also fast: conveying speed reaches up to 16m/min and stable capacity stays at 25-45 cartons/min, easily matching the pace of an upstream thermoforming machine. To ensure good bonding, the application mechanism uses a flexible press design that lays the pressure-sensitive label flat and snug on the blister lid with no wrinkles or bubbles. Conveyor width is adjusted electrically, so 8-count to 30-count egg cartons can be handled quickly without major modification.
3. Practical advice for production and selection
When planning production and selecting the machine, configure it to your capacity plan. If space is limited, the WZ-160 can run standalone; to build a fully automated workshop, it can connect directly to the upstream thermoforming line for integrated forming and labeling. In daily maintenance, clean the photoelectric sensors and conveyor belt regularly to maintain sensitivity and grip. The all-stainless-steel frame from Wanzhi Automation meets food-grade hygiene standards, and its solid weight absorbs vibration at high speed, keeping long production runs stable.
FAQ
1. How long does changeover take when switching egg carton specifications?
Conveyor width is adjusted electrically; when switching between 8-count and 30-count cartons, simply recall the preset parameters on the touch screen and fine-tune the mechanical stops, which usually takes 10-15 minutes.
2. How are blister packs kept from deforming during high-speed conveying?
The machine uses a stable integrated conveying design, and the low-vibration stainless steel frame keeps cartons from shaking; the application mechanism’s pressure is adjustable so thin, light cartons are not crushed.
3. How many finished products can the collection mechanism hold?
The automatic stacking and collecting mechanism holds up to 50 cartons at a time; once the set count is reached it pushes them out or signals an alarm for manual or AGV collection.
Written by Wanzhi Automation