Particle Quantitative Dosing Scales

Say Goodbye to Inefficiency and Loss: Experience Ultimate High-Speed Quantitative Granule Packaging

The Automatic Quantitative Granule Weighing Scale (Semi-Automatic Granule Scale & Woven Bag Quantitative Packaging Machine) is an industrial-grade, high-efficiency automation assistant specifically designed to solve packaging pain points such as slow manual weighing, intense physical bag handling, large weight errors, and low sealing efficiency.

LANTU Machinery introduces two core model series: LT-GK Series (Economical Pneumatic Control / Pneumatic Bag Clamping System) and LT-GKS Series (Flagship Full-Servo Twin-Bucket / Ultra-Fast Weighing System). Equipped with high-precision load cells, microcomputer dynamic compensation algorithms, and multi-stage feeding controls, combined with rapid bag clamping and high-efficiency sewing/heat-sealing units, the equipment acts like a precise and fast weight guardian. Whether handling small, delicate granules like salt, sugar, rice, grains, and seeds (e.g., 1kg–5kg plastic bags or small pouches) or large heavy-bag packaging like fertilizers, animal feeds, plastic granules, chemical raw materials, and construction materials (e.g., 10kg–50kg woven bags or kraft paper bags), it achieves accurate measurement, ultra-fast filling, automatic bag clamping, and integrated sealing—ensuring smooth material flow and top-tier accuracy.

As an original manufacturer of packaging machinery, LANTU Machinery has streamlined the traditional labor-intensive packaging process—which typically requires multiple workers for manual weighing, leveling, transferring, and stitching—into an operation as simple as using a smartphone. Operators simply place the bag (or container) onto the scale unit, step on the foot switch or trigger the sensor, and the pneumatic clamp immediately locks the bag in place. The machine then automatically completes two-stage or three-stage quantitative filling (“fast-to-slow” feed). Upon completion, the bag is released automatically, and on heavy-bag lines, it is smoothly conveyed via a heavy-duty conveyor to a vertical sewing machine for automatic stitching and thread cutting. Covering benchtop/vertical semi-automatic scales and heavy-duty bag packaging units, paired with dedicated Z-type bucket elevators or feeding hoppers, this line significantly shortens packaging workflows while saving labor, time, and costs.

Choosing a reputable source manufacturer is crucial for your return on investment. LANTU Machinery’s proven granule-metering algorithms and anti-jamming design, combined with robust reliability and industry-leading precision, ensure smooth, zero-breakdown operation on your production lines.

Core Components and Three System Guarantees (LANTU Precision Parts)

Our quantitative granule weighing scales are equipped with industry-leading components to guarantee high quality, flawless performance, and ultra-long service life from the source.

1. Power and Pneumatic Control System

Top-Tier Pneumatic & Servo Drives: Utilizes SMC or AirTAC pneumatic bag clamping and anti-leakage assemblies with millisecond-level control precision, ensuring tens of millions of trouble-free cycles; flagship models offer servo-controlled feeding gates for faster and smoother speed adjustments.

High-Precision Load Cells: Equipped with 304 stainless steel sealed load cells and industrial-grade weighing modules, maintaining accuracy within $\pm 0.1\% – 0.2\%$ with rapid feeding and precise measurement.

High-Precision Filtration & Three-Stage Air Source Processing: Features an industrial-grade air treatment triplet to effectively filter moisture and impurities from compressed air, maintaining stable pneumatic pressure.

Corrosion-Resistant Explosion-Proof Air Hoses: Utilizes imported high-elasticity, corrosion-resistant air tubing rated for high-pressure, continuous operation without air leakage.

2. Feeding and Material Conveying System

Multi-Stage Arc Feed Gate / Vibratory Feeder: Features LANTU’s proprietary “fast-medium-slow” three-stage feed valve, ensuring quick discharge without material dripping, completely eliminating feed dead zones and weight overshoot.

Tool-Free Quick-Release Hopper: The hopper adopts a stainless steel quick-open design with guided inclined surfaces to prevent granule bridging, allowing complete cleaning within 10 minutes without tools.

Heavy-Duty Non-Slip Conveying & Automatic Sewing/Sealing Unit: Heavy-bag models include a reinforced anti-slip conveyor belt and a vertical automatic photoelectric-sensing sewing machine (optional heat sealer or edge-binding unit), achieving automated clamping, discharging, conveying, and stitching.

Flexible Machine Configurations: Options available from semi-automatic benchtop/vertical scales (1kg–5kg) to heavy-duty woven bag quantitative packing units (10kg–50kg).

3. Intelligent Control and Safety Protection System

Siemens / Mitsubishi / Dedicated Industrial CPU Core: Industrial-grade central processing chip providing stable operation, strong anti-interference capabilities, and multi-language support.

High-Sensitivity Photoelectric & Weighing Feedback System: Features automatic fall-out value correction, automatically adjusting feeding cutoff thresholds based on bulk density changes to achieve closed-loop “weigh–discharge–compensation” control.

304 Stainless Steel Reinforced Frame: Material contact parts or full-body construction are built with 304 stainless steel (optional 316L for corrosive materials), meeting GMP and food/chemical hygiene standards while ensuring equipment durability and operator safety.

Specifications and Technical Parameters

To meet the diverse requirements of various factories regarding packaging speeds, weighing ranges, and material characteristics, Lantu Machinery’s automatic quantitative granule weigher offers two core configurations for you to choose from: the single-hopper pneumatic economy model and the dual-hopper fully servo-driven flagship model：

 Suitable Materials and Packaging Types

LANTU Machinery’s automatic quantitative granule scales offer superior compatibility and customized designs for diverse industries and container formats:

1. Applicable Materials (Free-Flowing Granules, Small Blocks, Spherical Particles)

Food & Agricultural Products: Rice, coarse grains (mung beans, red beans, peanuts), salt, sugar, seeds, nuts, snack foods, etc.

Chemicals, Fertilizers & Building Materials: Compound fertilizers, urea, organic fertilizers, plastic pellets, biomass pellets, cat litter, detergent beads/granules, small hardware items, etc.

2. Compatible Bag Types and Containers (Small-Weight / Heavy-Bag Full Coverage)

Small/Medium Bags (1kg – 5kg): Stand-up pouches, tote bags, aluminum foil bags, paper bags; plastic jars, buckets, boxes, and rigid containers.

Heavy Bags (10kg – 50kg): Plastic woven bags, kraft paper bags (paired with vertical photoelectric automatic sewing machines); composite film bags, valve bags (optional heat sealers or “heat-seal + stitch” dual line).

5 Reasons to Choose LANTU Machinery’s Granule Weighing Scales

High precision, low maintenance, and long-term stability are essential when investing in automated packaging lines. LANTU Machinery delivers plug-and-play, durable solutions for every factory.

Dustproof, Anti-Explosion & Eco-Friendly Design: Sealed pneumatic bag clamping and dust extraction interfaces eliminate falling dust, significantly improving workspace sanitation.

Ultra-Clean Pneumatics & Vibration-Damped Circuits: Internal air lines, fittings, and electronic wiring undergo clean-air purge and anti-vibration sealing before assembly, reducing mechanical wear and breakdown risks.

Pre-Factory Real-Material Running Tests: Every unit undergoes continuous running tests across high, medium, and low speeds with various granule types before dispatch to ensure zero weight deviation.

Dual Voltage and Air Pressure Stabilization: Built-in wide-range voltage regulators and pneumatic overload protection handle power and pressure fluctuations to ensure consistent weighing and sealing quality.

Modular Quick-Release Maintenance: Hoppers and feeding valves feature tool-free clips for quick disassembly and fast cleaning during product switches.

Key Factors to Consider When Purchasing a Granule Weighing Scale

To help you choose the best machine for your production line, consider the following key selection criteria:

Material Physical Properties:

Fragile granules (e.g., seeds, puffed pellets) require cushioned deceleration chutes;

Corrosive granules (e.g., chemical fertilizers, sea salt) require 304/316L stainless steel contact/body construction;

Fine-granule mixtures require leak-proof seal valves and dust collection ports.

Target Weight Range:

Small-weight models: Cover 1kg–5kg, ideal for bottles, buckets, or small pouches;

Heavy-bag models: Cover 10kg–50kg, ideal for woven bags, kraft paper bags, or valve bags.

Downstream Sealing Method: Heavy woven bags require automatic sewing machines; plastic/composite bags require high-frequency heat sealers; inner-liner paper bags require combined “heat-seal + stitching” units.

Target Capacity (Bags/Hour): Choose single-bucket models (300–500 bags/hr) or twin-bucket/servo high-speed models (600–1000 bags/hr) based on manual bag-placing speeds.

Special Environmental Needs: Explosive or flammable chemical granules require explosion-proof motors, sealed electrical boxes, and anti-static grounding.

Frequently Asked Questions (FAQ)

Q1: How do I choose between LT-GK (Pneumatic) and LT-GKS (Flagship Servo / Twin-Bucket System)?

A: If your capacity requirement is moderate (300–500 bags/hr) and budget-conscious, choose the LT-GK Economical Model. If you require higher throughput (>600–1000 bags/hr) and strict weighing accuracy (error < $\pm 0.1\%$), select the LT-GKS Flagship Servo/Twin-Bucket Model.

Q2: What protective features are built in for corrosive materials (e.g., compound fertilizers, sea salt)?

A: We equip the machine with full 304 stainless steel (or optional 316L) construction, corrosion-resistant pneumatic components, and sealed electrical control enclosures to ensure durability in moist, corrosive environments.

Q3: How difficult is operation and cleaning when switching specs or materials?

A: Extremely simple. Feeding hoppers and weigh buckets utilize tool-free quick-release structures for fast washing. The PLC touchscreen stores multiple product recipes for one-touch specification switching.

Contact the Source Manufacturer Today to Get Your Customized Granule Packaging Solution!

LANTU Machinery — Dedicated Packaging Machinery Manufacturing, Source Factory Quality Guaranteed.