What Essential Equipment Does a Fully Automatic Pet Food Sachet Case Packaging Line Include?

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A fully automatic pet food sachet case packaging line is a sophisticated, multi-station end of line packaging system designed to transform individually wrapped pet food sachets from the primary packaging stage into shelf-ready, palletized cases with minimal human intervention. At TECHFLOW PACKAGING SOLUTIONS, we engineer these lines as integrated, modular systems where each component is precisely synchronized to handle the unique challenges of flexible pet food packaging—including lightweight sachets, varying film coefficients of friction, and strict hygiene requirements. The essential equipment chain typically begins with the upstream primary packaging machine, most commonly a Vertical Form Fill Seal (VFFS) machine or a Horizontal Form Fill Seal (HFFS) flow wrapper, which produces the sealed pet food sachets containing wet food, treats, or nutritional supplements.

Immediately following the bagging machine, a transition conveyor (also called a transfer conveyor or interconnecting belt) receives the sachets and transports them away from the sealing jaws while allowing them to cool and stabilize. This conveyor often incorporates cooling fans or accumulation buffers to prevent heat-induced seal distortion. The sachets then enter a sorting machine (sachet sorting unit), which is arguably the most critical upstream component for secondary packaging. Because sachets exiting a VFFS are often overlapping, skewed, or delivered in a disorganized mass, the sorting machine uses multi-row roller conveyors with differential speeds and arrays of photoelectric sensors to singulate, flatten, and align each sachet into a single-file, uniformly spaced stream.

Downstream of the sorter, a counting machine (electronic counting unit) verifies that the correct number of sachets passes through before they enter the collation zone. This counting function can be integrated into the sorting module or operate as a standalone unit with high-speed optical sensors. The counted sachets are then fed into a servo collation system (servo-driven grouping station), where they are arranged into the required pack pattern—such as 4×3, 5×4, or 6×5 matrices—matching the case dimensions. For wraparound case packing applications, this collation is often performed by a dual-servo indexing system that creates tight, uniform bundles.

The collated group then proceeds to the case packer machine, which may be a pick-and-place robotic case packer for RSC (Regular Slotted Container) cartons or a wraparound case packer for glued wraparound cartons. Finally, the sealed cases pass through a checkweigher (in-line weight inspection system) to verify pack count accuracy, followed by a reject station that diverts underweight or overweight cases, and ultimately a case conveyor leading to palletizing. At TECHFLOW PACK, we customize each of these modules—sorting, counting, collating, and case packing—to match the client's sachet dimensions, production speed targets, and factory layout constraints, ensuring a seamless pet food packaging automation solution.