What Essential Equipment Does a Yogurt Cup End-of-Line Packaging Line Include?

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A yogurt cups end-of-line packaging line represents a highly integrated segment of dairy packaging automation, bridging the gap between primary cup forming/filling and palletized distribution. At TECHFLOW PACKAGING SOLUTIONS, we design these lines as complete turnkey packaging systems that ensure delicate dairy products move from the filling machine to the shipping dock with maximum efficiency, hygiene compliance, and product integrity. The core equipment chain begins with the transition conveyor system (also called an interconnecting conveyor or transfer belt), which receives the sealed yogurt cups directly from the cup filling and sealing machine. This conveyor is typically constructed from food-grade stainless steel with modular plastic belts or PU belts, featuring adjustable side rails and drip trays to accommodate cup diameters ranging from 75mm to 95mm and to manage condensation or product residue common in chilled dairy environments.

Following the transition conveyor, the line incorporates a vision inspection station equipped with high-resolution industrial cameras and LED strobe lighting. This system performs critical quality control functions—detecting improperly sealed cups, underfilled containers, damaged rims, or missing lids—before the cups enter the packaging phase. Rejected cups are pneumatically diverted to a waste chute, ensuring only perfect products proceed downstream. Next comes the cup collation and alignment system (cup arranging mechanism), which uses precision servo-driven lane dividers and timing screws to organize the randomly spaced cups into parallel lanes with exact center-to-center spacing. This alignment is crucial for downstream robotic handling.

The heart of the line is the wraparound case packer (also known as a wraparound cartoning machine or one-piece case former), which automatically erects flat corrugated blanks into open trays, receives the collated cup matrix, wraps the carton around the product bundle, and seals the flaps using a hot-melt glue system. Supporting this core machine is a delta robot picking system (spider robot or parallel kinematic robot) that gently transfers cups from the alignment conveyor into the collation buffer station. Downstream of the case packer, an in-line checkweigher (dynamic weighing system) verifies that each sealed case contains the correct number of cups by detecting weight deviations as small as ±2 grams. Non-conforming cases are rejected by a pneumatic pusher or drop-down conveyor segment.

Finally, the line includes a case coding and marking system, typically an inkjet printer or laser coder, that applies batch numbers, expiration dates, barcodes, and traceability information directly onto the exterior of the case. Additional auxiliary equipment may include accumulation buffers, carton blank magazines with low-level sensors, glue melters with temperature control, and conveyors leading to palletizing. At TECHFLOW PACK, we integrate all these components under a single master PLC architecture with centralized HMI control, ensuring that the yogurt cups packaging line operates as a unified, synchronized system rather than a collection of standalone machines.