Automatic Weighing & Packaging Machine

The High-Speed, Precision Solution for Bagging Fertilizer with Unmatched Consistency and Efficiency

The Automatic Weighing & Packaging Machine is an integrated, high-performance system designed to automate the final stage of fertilizer production: bagging. It precisely weighs a pre-set quantity of granular or prilled fertilizer, fills it into open-mouth bags (woven PP or PE), and then seals the bags through sewing or heat sealing—all in a continuous, automated cycle. This system is essential for achieving consistent bag weights, maximizing packaging line throughput, reducing labor costs, and delivering a professionally finished product ready for palletizing and shipment.

Automatic Weighing & Packaging Machine

Key Features

  • High-Precision Weighing System

    Utilizes advanced digital load cell technology in a net-weight or gross-weight configuration to ensure each bag meets exact target weight, minimizing giveaway and ensuring regulatory compliance.

  • Automated Bag Handling

    Integrated bag placers automatically pick and position empty bags onto the filling spout. Hook conveyors or belt conveyors then transport filled bags to the sewing/sealing station and onwards.

  • Adaptable Filling & Densification

    Features a fast-fill and dribble-fill mode for speed and accuracy. May include pneumatic or mechanical tamping devices to settle material and maximize bag capacity, especially for granules.

  • Programmable Logic Control (PLC) & HMI

    A user-friendly touchscreen interface allows for easy setting of bag weight, number of bags, and production data tracking. It manages the entire sequence from bag placement to discharge.

  • Robust Construction for Abrasive Materials

    Contact parts, such as the filling spout, hopper, and conveyors, are built from abrasion-resistant materials to withstand continuous operation with fertilizer products.

Advantages

  • Unmatched Weight Accuracy & Consistency

    Eliminates human error in manual weighing, guaranteeing every bag meets the declared net weight, protecting profits and brand reputation.

  • Significant Labor Savings & Increased Output

    One operator can manage multiple packing lines, dramatically increasing bags-per-hour output compared to manual or semi-automatic methods.

  • Reduced Product Loss & Spillage

    The enclosed, automated process minimizes dust generation and spillage during transfer and filling, improving yield and plant cleanliness.

  • Enhanced Operational Safety

    Automates heavy lifting and repetitive tasks, reducing the risk of ergonomic injuries associated with manual bag handling and sewing.

  • Professional Finish & Traceability

    Produces neatly filled and securely sealed bags. Production data (bag count, weights) can be logged for batch traceability and quality control.

Applicable Raw Materials & Packaging

  • Granular Fertilizers

    NPK blends, urea, DAP/MAP, potassium chloride/sulfate.

  • Prilled Fertilizers

    Urea and ammonium nitrate prills.

  • Pelleted Products

    Organic fertilizer pellets.

  • Bag Types

    Woven polypropylene (PP) bags, polyethylene (PE) bags, with sewn or heat-sealed closure.

Basic Structure & Components

Automatic Weighing & Packaging Machine
Product Supply Hopper

A surge bin that receives fertilizer from the upstream process and feeds the weigher.

Weighing Hopper & Load Cell Assembly

The core weighing unit, suspended on high-precision load cells.

Filling Spout & Clamping Mechanism

Guides product into the bag and securely clamps the bag mouth open during filling. Often includes a dust skirt.

Automatic Bag Placer

A robotic arm or suction cup system that picks empty bags from a magazine and places them on the spout.

Bag Conveying System

A hook conveyor (for sewn bags) or belt conveyor that moves bags from the filler to the closer.

Bag Closer

An industrial sewing machine or heat sealer that securely closes the filled bag.

Control Cabinet with PLC & HMI

The brain of the system, controlling sequencing, weighing, and data management.

Supporting Frame & Enclosures

A rigid frame housing all components, often with safety guards.

Technical Data

Specification

Speed (Pack/H)

Measure scope (Kg/pack)

Precision

Electricity consumer (kw/h)

Spirit consume (nl/min)

Single

400-600

20-50

±1/500-±1/1000

0.7

80

Double

600-1200

20-50

±1/500-±1/1000

1

120

Three

1200-1800

20-50

±1/500-±1/1000

1.3

160

 

Key Differentiators vs. Other Packaging Methods

Replaces multiple labor-intensive, inconsistent, and slow steps with a single, fast, and precise automated process. Delivers order-of-magnitude improvements in speed, accuracy, and cost per bag.

Provides full automation from bag placement to closing, eliminating the need for an operator to physically handle each bag during filling. This significantly boosts output per operator and improves safety.

Designed for open-mouth bags which are typically more cost-effective and common for fertilizer in many markets. Valve bag packers are for pre-formed valve bags, a different packaging style.

This is for consumer/commercial bagged product. For bulk loading into trucks or railcars, a completely different bulk weighing and loading system is used. They serve distinct distribution channels.

It is the indispensable, high-return investment for any fertilizer producer packaging product for wholesale or retail distribution, enabling scalable, profitable, and quality-assured bagging operations.