Full-Automatic Bag-in-Bag Weighing and Packaging System | High-Speed Secondary Sachet Packaging Line

End-to-end automated bag-in-bag solution for snacks, confectionery, dietary supplements, pet treats and granular products, delivering precise dosing, stable packaging and full-process quality control

Industry Pain Points We Solve

• ·Manual or semi-automatic bag-in-bag packaging relies heavily on labor, resulting in extremely low production efficiency, high labor costs and frequent human error in sachet counting

• ·Irregular sachet feeding causes jamming, stacking and uneven conveying, leading to inaccurate weight/count, missing sachets, serious customer complaints and brand reputation damage

• ·Inadequate degassing of outer pouches causes severe bulging, poor sealing, easy breakage during transportation and shortened product shelf life

• ·Unstable zipper opening and sealing mechanism for stand-up pouches leads to high defect rate and low finished product yield

• ·Lack of in-line full inspection allows unqualified products with missing sachets or incorrect weight to enter the market, bringing high recall and compliance risks

• ·Poor equipment compatibility requires long downtime for format changeover between different sachet sizes and outer pouch specifications, resulting in low overall equipment efficiency (OEE)

• ·Chaotic arrangement of inner sachets in outer pouches leads to poor packaging appearance, which cannot meet the display requirements of retail and supermarket channels

• ·Open production process brings cross-contamination risks, failing to meet strict global food safety regulations (FDA, BRC, HACCP)

Core Customer Requirements We Meet

• ·Fully automated end-to-end production to minimize manual labor and human error, and improve production efficiency

• ·Stable and uniform sachet feeding without jamming or stacking, to ensure 100% accuracy of sachet count and weight in each outer pouch

• ·Reliable degassing and sealing system to eliminate pouch bulging, ensure airtight sealing and extend product shelf life

• ·Stable zipper/heat-seal buckle opening mechanism, compatible with multiple outer pouch formats including stand-up zipper pouches and flat heat-seal pouches

• ·In-line full-process weight inspection with automatic rejection of unqualified products, to ensure zero non-compliant products enter the market

• ·Quick tool-free format changeover, adapting to different inner sachet sizes, outer pouch specifications and production SKUs

• ·Full food-grade equipment design, fully compliant with FDA, BRC, HACCP and other international food safety standards

• ·Ergonomic design for convenient manual scanning, coding and final packing of finished products

• ·Stable 24/7 continuous operation with low failure rate, easy operation and maintenance

Our Tailored Integrated Solution

We provide a fully automatic, high-efficiency bag-in-bag weighing and packaging system, an end-to-end secondary packaging solution exclusively designed for sachet-in-pouch production. This integrated line seamlessly combines buffer feeding, stable conveying, high-precision weighing, high-speed rotary packaging, reliable degassing & sealing, in-line quality inspection and finished product conveying, perfectly solving all core pain points of bag-in-bag packaging. It realizes fully unmanned automated production from inner sachet feeding to finished outer pouch output, ensuring every product meets your strict quality requirements and global regulatory standards.

Core System Units

·Independent Vibrating Feeder Buffer System: Achieves smooth, uniform and non-blocking feeding of inner sachets after they are discharged from the upstream production line, effectively avoiding sachet stacking, jamming and uneven conveying, and ensuring stable feeding for subsequent processes

·High-Inclination Bucket Elevator: Conveys buffered sachets to the upper weighing system in a gentle, damage-free and non-tipping way, maintaining the integrity and neat arrangement of inner sachets throughout the conveying process

·16-Head Bag-in-Bag Specialized Multihead Weigher (with Timing Hopper & Reject Chute): High-precision combination weigher exclusively optimized for sachet weighing, with a timing hopper for accurate material discharge and a built-in reject chute for unqualified single weighing batches, ensuring ultra-high accuracy of sachet count and weight in each outer pouch

·10-Station Rotary Packaging Machine: High-speed continuous rotary packaging unit, compatible with stand-up zipper pouches, flat heat-seal pouches and other multiple outer pouch formats. Equipped with a three-level material piercing and degassing system to thoroughly exhaust air from the pouch and avoid bulging, plus a professional zipper/heat-seal buckle opening mechanism to ensure stable and reliable bag opening and sealing

·In-line Weight Sorting Machine (Pusher Rejection Mode): Final full-inspection quality control unit, which performs 100% weight verification of finished pouches, and automatically rejects unqualified products with incorrect weight or missing sachets through the pusher rejection mechanism, ensuring zero non-compliant products flow into the market

·Horizontal Finished Product Belt Conveyor: Smoothly conveys qualified finished products to the subsequent packing station, with a compact layout for seamless connection with the upstream sorting process

·Food-Grade Stainless Steel Supporting Platform: Ergonomic working platforms installed on the left and right sides of the linear conveyor, providing convenient and safe operation space for manual scanning, coding and final packing of finished products

Standard Automated Workflow

·Sachet Buffer Feeding: Inner sachets discharged from the upstream production line enter the independent vibrating feeder, which completes buffer storage and uniform, non-blocking feeding of sachets.

·Stable Conveying & Lifting: Sachets are conveyed to the high-inclination elevator, which lifts them gently and stably to the feeding hopper of the 16-head bag-in-bag specialized multihead weigher.

·High-Precision Weighing: The 16-head multihead weigher completes high-accuracy combination weighing of sachets according to the set target weight/count, with the timing hopper ensuring precise discharge, and the built-in reject chute automatically eliminating unqualified weighing batches.

·Automatic Packaging & Degassing: Weighed sachets are transferred to the 10-station rotary packaging machine, which completes automatic bag opening, material filling, three-level piercing and degassing, and zipper/heat sealing in one continuous process.

·In-line Quality Inspection: Finished pouches are discharged to the in-line weight sorting machine, which performs 100% weight verification. Unqualified products are automatically rejected by the pusher mechanism, while qualified products flow into the horizontal belt conveyor.

·Finished Product Output: Qualified finished products are conveyed via the horizontal belt conveyor, with stainless steel supporting platforms on both sides providing convenient operation space for manual scanning, coding and final packing, completing the full bag-in-bag production cycle.

Proven Results & Core Business Benefits

• Ultra-High Dosing Accuracy: 16-head specialized weigher delivers ±0.5g weighing accuracy, ensuring 100% consistency of sachet count and weight in every outer pouch, reducing customer complaints by over 99% and eliminating product recall risks

• Dramatic Production Efficiency Boost: Fully automated end-to-end production achieves a stable output of 30-60 outer pouches per minute, cutting manual labor by 85% and greatly reducing labor costs

• Perfect Packaging Quality: Three-level piercing and degassing system thoroughly eliminates pouch bulging, with stable sealing performance achieving zero leakage, effectively extending product shelf life by over 30%

• Superior Production Flexibility: Tool-free quick format changeover can be completed within 10-15 minutes, perfectly adapting to different inner sachet sizes, outer pouch specifications and multi-SKU production demands

• 100% Full-Process Quality Control: Dual inspection system (built-in weigher rejection + final weight sorting machine rejection) ensures zero unqualified products enter the market, fully protecting your brand reputation

• Full Global Regulatory Compliance: All product-contact parts adopt food-grade 304 stainless steel with no sanitary dead corners, fully meeting FDA, BRC, HACCP and other international food safety standards

• Low Maintenance & High OEE: Stable and durable design with anti-jamming optimization minimizes unplanned downtime, supports 24/7 continuous production, and achieves fast return on investment

• Ergonomic & User-Friendly Design: Stainless steel supporting platforms on both sides provide convenient operation space for manual scanning and packing, greatly improving the efficiency of the final packing process