How to Choose Matching Small Bag Into Big Bag Secondary Packaging Machine – Real Customer Project Case

1. Project Background & Client Pain Point

Many food, seasoning and daily chemical manufacturers struggle with inaccurate secondary bag counting: slight weight deviation of finished small pouches leads to miscounting, short-packed or over-packed big bags, causing customer complaints and brand losses.

As a professional secondary packaging machine source factory with 16 years of independent R&D and manufacturing experience, we customized a fully automatic integrated bag-in-bag secondary packaging production line for one client to thoroughly resolve the counting error issue triggered by underweight small sachets. This complete turnkey line realizes seamless connection from primary small pouch incoming material to final automatic cartoning.

2. Core Technical Parameters of This Custom Secondary Packing Line

• Primary small pouch size: 100mm × 120mm
• Secondary big bag size: 200mm × 280mm
• Packing quantity per big bag: adjustable 3–8 pcs small pouches
• Production speed: 50 big bags per minute
• Production connection: Front docking with small pouch feeding conveyor; rear docking with automatic cartoning machine for unmanned full-line operation

3. Complete Configuration of The Whole Secondary Packaging Line

The integrated bag-in-bag system consists of six core standard modules, fully customized and assembled by our factory:

1. Large-inclined climbing elevator: Stably lift scattered small pouches without scratching packaging film
2. Multi-head combination counting weigher: Dual verification of optical counting + weight rechecking
3. Stainless steel operation working platform: Convenient daily inspection, parameter adjustment and maintenance
4. Vertical bag-in-bag secondary packaging machine: Auto bag forming, filling, heat sealing and cutting
5. Online coding machine: Print production date, batch number and QR code on outer big bags
6. Finished product output conveyor: Smoothly transport packed big bags to downstream cartoning station

4. Our Core Technical Advantage: Solve Counting Inaccuracy From Underweight Small Bags

The biggest pain point of conventional secondary packers is unreliable counting when small pouches have inconsistent single weight. Our factory developed mature targeted technical optimization for counting & packaging links:

• Dual-layer counting verification system: Photoelectric counting records pouch quantity, while combination weigher rechecks total weight of grouped small pouches inside each big bag
• Intelligent weight deviation threshold setting: The PLC system automatically rejects underweight/overweight grouped batches to avoid miscounting finished big bags
• Anti-jam soft silicone conveying structure: Prevent pouch stacking, overlapping or missing during material sorting
• One-touch adjustable quantity program: Switch 3/4/5/6/7/8 pouches per big bag on touch screen without mechanical rework

This proprietary technical processing perfectly eliminates miscount risks brought by underweight primary sachets, greatly lowering product rejection rate and after-sales quality issues for clients.

5. Full Automatic Unmanned Production Flow

1. Small finished pouches flow into the inclined elevator from upstream primary packaging equipment
2. Elevator feeds pouches evenly onto the counting combination weigher for sorting and quantity grouping
3. Grouped pouches are delivered to vertical secondary packing machine for auto bag making, filling and sealing
4. Online coding equipment marks production information on sealed big bags
5. Finished big bags are sent via output conveyor to automatic cartoner for final boxing
6. Whole line runs continuously with minimal manual intervention, only one operator for regular inspection

6. Why Cooperate With Our 16-Year Source Packaging Machine Factory

1. Independent machining & assembly workshop, no middleman markup, support fully customized secondary packaging lines according to pouch size, speed and production layout
2. Mature proprietary counting correction technology targeting small pouch weight fluctuation problems
3. Complete supporting accessories: elevator, weigher, platform, coding machine, conveyor, cartoning docking structure
4. Global after-sales service: Remote online debugging, overseas video technical support, long-term supply of spare parts
5. All machines pass CE certification, adopt international brand electrical components, stable operation and long service life
6. Free sample testing & real running video shooting for every customized secondary packaging project

7. Who Is This Bag-In-Bag Secondary Packing Line Suitable For?

Manufacturers that need to pack multiple small sachets into large outer bags, including seasoning, snack, beverage powder, daily care sachets, agricultural seed pouches and other products with slight single-pouch weight errors. We can adjust line speed, pouch size range and matching modules to fit your unique production demands.