On packaging lines in food, household products and printed paper, marking the product bottom is an important part of compliance and traceability. Conventional bottom labeling usually requires turning the workpiece by hand or adding a complex turning mechanism, which costs labor and easily becomes a bottleneck. To solve this pain point, Wanzhi Automation developed the WZ-129 bottom labeling machine, whose innovative recessed structure labels without turning the product, helping companies raise packaging efficiency.
Pain points in conventional bottom labeling and the solution
Conventional lines face two main problems with bottom labeling. First, manual turning and labeling is slow and inconsistent. Second, adding a mechanical turning mechanism takes up more floor space and raises the failure rate. To address these pain points, the WZ-129 uses a labeling structure dedicated to the underside of all kinds of items. Its core design places the labeling head recessed beneath the conveyor belt, so material simply travels through the labeling zone face up and the bottom label is applied automatically. This design removes the need to turn workpieces by hand or machine, greatly simplifying line layout and reducing maintenance costs.
WZ-129 technical advantages and parameters
On performance, the labeler shows a high degree of flexibility and stability. Its capacity range is broad, with labeling speed adjustable between 20-80PCS/min, comfortably covering both small-batch sampling and high-volume continuous production. On compatibility, it handles products up to 300mm wide, and both conveying width and the positioning structure can be customized to order. Labeling accuracy is stable, with error held within ±1mm, keeping bottom labels flat and wrinkle-free. The WZ-129 also supports an integrated traceability solution: a coding unit or inline inkjet printer can be integrated to print production dates, batch numbers and barcodes at the same time as labeling. The independent touch screen provides visual adjustment of label feed length and pressing force, and programs can be stored for easier changeover. In developing this machine, Wanzhi Automation took full account of the workshop environment, using a one-piece stainless steel frame with swivel castors to meet the demands of long, uninterrupted batch production.
Practical tips and applications
On selection and operation: before introducing a bottom labeling machine, first define the maximum overall dimensions and weight of your product so that the belt’s limit and positioning structure and any frame lengthening can be specified. For food containers, household product cans, paper gift boxes and wood panels that need pressure-sensitive labels or protective film on the bottom, the machine provides a stable automation solution. Before production starts, we recommend running a small trial batch using the stored programs to confirm label position and code legibility, so the machine integrates smoothly with your line.
FAQ
Does the WZ-129 require manual turning of the product?
No. The labeling head is installed in a recessed position, so material passes through face up and the bottom label is applied without any manual turning.
Can the machine print the production date and barcode while labeling?
Yes. The WZ-129 supports an integrated traceability solution: a coding unit or inline inkjet printer can be added to print traceability information on the label surface.
If products are large, can the machine be customized?
Yes. The machine handles products up to 300mm wide as standard; for special workpiece sizes, the conveyor belt can be widened or the frame lengthened to order.
Written by Wanzhi Automation