With the rapid growth of fresh food e-commerce and the prepared meal industry, automation in packaging is increasingly important. Manual weighing, printing, and labeling is inefficient and prone to data errors, and hardly meets the strict traceability requirements of modern supermarkets. Achieving precise synchronization of weight data and label information at high-speed portioning pace is a core challenge in packaging line upgrades.

Fresh food packaging pain points and our integrated solution

In fresh food and prepared meal packaging, product weights vary naturally and there are many SKUs. In the conventional setup, operators weigh the product, enter data manually to print, and then apply labels by hand. This takes a lot of labor and, due to fatigue, easily puts the wrong weight, price, or barcode on a label, creating complaint and compliance risks.

To address this, the industry is moving to integrated weighing, printing, and labeling equipment. Take the WZ-600 print-and-apply labeling machine from Wanzhi Automation, which deeply integrates inline weighing, industrial instant printing, and automatic labeling. When a product passes the weighing platform, the system captures the weight, matches it against the product database, generates a label with the product name, unit price, and barcode in real time, and the labeling head applies it automatically, completely bridging the gap between data and physical packaging.

Core technology and specifications

The core of this integrated approach is real-time data linkage and the stability of the actuators. Technically, a print-and-apply system needs fast response and high-precision control.

First, data capture and processing are the foundation. A high-precision weighing module achieves ±2 g accuracy and sends weight data to the printing system in real time, ensuring zero errors in weight, price, and barcode information and fully meeting the traceability standards of fresh food supermarkets.

Second, the printing and labeling actuators must match the line pace. The WZ-600 uses an industrial high-speed instant printer that dispenses labels in real time on command, eliminating the inventory cost of pre-printed labels. For labeling, a photoelectric sensor detects when the workpiece is in position, and the pneumatic labeling structure provides stable pressure. The standard air supply requirement is 0.6-0.8 MPa, ensuring stability over long continuous packaging runs. The machine also switches freely between top-surface and bottom labeling modes, with throughput up to 30-50 PCS/min, readily matching high-speed sorting lines.

Line upgrade selection criteria and applications

When upgrading lines and selecting an automatic labeling machine, companies should focus on the following points:

  • Data integration capability: confirm that the machine supports visual editing and storage of the backend product database so print templates can be switched quickly when changing products.
  • Labeling mode compatibility: choose a model supporting top-surface or bottom labeling to suit the upstream packaging process (bagged, boxed, etc.), ensuring one machine serves multiple uses.
  • Air supply and stability: assess whether the workshop air supply meets the 0.6-0.8 MPa standard to keep pressure in the pneumatic labeling structure stable.

Today such equipment is widely used in fresh food supermarket packaging, prepared meal portioning, produce sorting, and parcel labeling in express logistics, effectively advancing digitalization and automation in packaging.

FAQ

How does a print-and-apply labeling machine handle the same product at different weights?

The machine has a built-in industrial PC terminal; the system matches the real-time weight from the weighing module against the unit price and specifications in the backend product database, calculates the total price, and generates the corresponding barcode and label content automatically, with no manual intervention.

How do I troubleshoot wrinkles or offset during labeling?

First check that air supply pressure is stable between 0.6 and 0.8 MPa; then check that the photoelectric sensor position is accurate so the labeling head acts precisely when the workpiece arrives; finally confirm that the angle between the label liner and the peel plate is suitable.

How does the machine switch between top-surface and bottom labeling?

The WZ-600 has a modular design: by adjusting the mounting position of the labeling head and the detection direction of the sensor, it can be physically switched between top-surface and bottom labeling. Refer to the machine manual or contact our technical staff for guidance.

Written by Wanzhi Automation