Automatic Bulk Weighing Machine | Bulk Weigher | LIMA

Precision Weighing for Bulk Materials

The Automatic Bulk Weighing System, also known as a Bulk Weigher, offers accurate and reliable electronic weighing solutions for a wide range of free-flowing bulk materials. Designed to integrate into packaging lines, this system ensures precise dosing for optimal product consistency and packaging efficiency. It is suitable for handling granular materials, powders, lumps, strips, and flakes, making it a versatile choice for various industrial applications.

Key Performance Parameters

Achieve high-speed, accurate weighing with the Automatic Bulk Weighing Machine. Performance specifications vary depending on the target bag size:

Parameter	20-50kg Bag	500-1000kg Bag
Weighing Speed	Up to 2000 bags/hour	10-50 bags/hour
Weighing Accuracy	±0.1%	±0.05 to 0.1%

These specifications highlight the system's capability to meet demanding production requirements while maintaining high precision.

Versatile Feeding Solutions

To accommodate different material characteristics, the bulk weigher offers multiple feeding methods:

• Gravity Feeding: Ideal for free-flowing materials.
• Vibratory Feeding: Suitable for materials that require assistance to flow or may bridge.
• Spiral Feeding: Effective for powdery or non-free-flowing materials.

The selection of the feeding method is crucial for ensuring accurate and consistent material flow into the weighing hopper.

Core Components for Reliable Operation

The system is built with high-quality components to ensure durability, reliability, and precise performance.

• Weighing Module: Equipped with HBM stainless steel bending beam load cells from Germany. These load cells offer strong interference resistance, rapid weighing speeds, quick response times, and excellent stability for precise measurements.
• Weighing Controller: Features UNIPULSE F701 or F805 touchscreen models from Japan. Known for high interference resistance and sensitivity, these controllers support fast A/D conversion and a sampling rate up to 100 times per second, crucial for high-precision weighing demands.
• Weighing Hopper: Designed with a tension rod structure to effectively minimize vibrations and enhance weighing accuracy. The cone-shaped discharge door facilitates faster and more efficient material release.
• Material Contact Parts: Components that come into direct contact with the materials are constructed from 304 or 316L stainless steel, based on product characteristics. These parts are finished with 150# abrasive polishing to prevent material buildup and ensure smooth operation.

Advanced electrical components, including SMC cylinders and solenoid valves from Japan, and OMRON or SIEMENS PLC controllers, ensure reliable operation. The PLC offers user-friendly features like digital calibration and adjustable coarse/fine feeding values, contributing to low maintenance and cost-efficient operation.

Customization and System Integration

The Bulk Weighing System offers customization options to meet specific production needs:

• Feeding Method Selection: Choose gravity, vibratory, or spiral feeding based on material flow properties.
• Weighing Hopper Design: Hoppers are designed according to material bulk density and specific weighing requirements.
• Configuration: Available in single or dual scale setups, and gross or net weight systems, optimized for desired output, accuracy, and speed.
• Material Contact Parts: Construction using 304 or 316L stainless steel depending on the product handled.

The system can be easily integrated into complete packaging lines with optional equipment such as conveyors, bag sewing machines, and heat-sealing machines, providing tailored solutions for various operational setups.

Diverse Applications

This automatic bulk weigher is widely applied across industries for packaging and weighing a variety of bulk materials. Common applications include:

• Petrochemical, Chemical, and Fertilizer Industries: Handling granular and powdery products like urea, soda ash, and other chemicals.
• Animal Feed and Additives: Packaging various feed types and powdered additives.
• Plastics: Weighing granular materials like PP granules.
• Other Industries: Suitable for laundry additives and any free-flowing bulk material requiring accurate weighing before packaging.

Examples of applications include weighing 40kg bags of soda ash and bulk urea, or 1000kg bags of PP granules and laundry additives, often integrated into automatic packaging lines.