Working Principle And Process Of Secondary Packaging Equipment

The core function of secondary packaging equipment is to automatically collect and pack products that have completed primary packaging (such as small bags and small boxes) into larger packaging units (such as large bags, cartons, and woven bags) according to preset quantities and arrangements, and complete subsequent processes such as sealing and output.

A typical fully automatic packaging process for small bags into large bags is as follows: material → primary packaging (small bags) → horizontal conveying → inclined shaping conveying → high-speed conveying → automatic bag sorting → automatic bag loading → counting and filling → automatic sewing and sealing → finished product output/palletizing. The core links include: automatic bag loading, bag opening, counting, filling, sealing (sewing or heat sealing), and output.

For heavy bag packaging such as feed, the process may include: automatic bag picking, shaping, bag opening, bag loading, clamping the material opening, material dropping, bag pressing, bag shaking, clamping and holding the bag, bag opening shaping, automatic labeling, folding and sewing, etc.  For bag-in-bag or food packaging, the process may include: bag loading, coding, zipper opening, bag opening, metering and feeding, cleaning, heat sealing, and shaping.

The control system typically uses a PLC (Programmable Logic Controller) and a touchscreen human-machine interface to achieve centralized control, parameter setting, data storage, and fault alarms. High-end equipment features automatic detection functions (such as no-bag, bag removal, and unopened bag detection) with automatic alarm and shutdown, as well as automation characteristics such as rapid changeover and flexible conveying.