Granule Weighing Machine - 3 Head Linear Scale

Keypack Intelligent 3-Head Linear Weighing Scale is a compact automatic dosing system designed for high-accuracy quantitative weighing of uniform free-flowing granular and powder materials. It delivers ±1g weighing accuracy at 30 bags per minute with a 50-4000g weighing range, featuring a modular PLC control system with 7-inch touchscreen interface and automatic amplitude adjustment. Ideal for white sugar, salt, rice, seeds, sesame, coffee, milk powder, MSG, chicken essence, and seasoning powder packaging in small-scale food production, agricultural seed processing, and specialty ingredient operations.

Product Overview

This linear weighing scale operates through a three-bucket linear configuration where granular and powder materials flow from a 6-liter central hopper through electromagnetic vibratory feeders into three independent weighing buckets arranged in a straight-line layout. Each weighing bucket incorporates a dedicated high-precision load cell sensor providing real-time weight monitoring, with the integrated PLC control system selecting optimal bucket combinations to achieve target weight with minimal deviation. This ultra-compact linear weighing design provides an economical entry point for automated weighing compared to larger multi-head systems, while maintaining reliable accuracy for consistent free-flowing materials including granulated sugar, rice grains, coffee beans, uniform seeds, and fine powders in startup and small production volumes.

The advanced modular control system features variable-frequency vibratory feeders with automatic amplitude adjustment, enabling precise material flow optimization from bulk hopper to weighing buckets without manual calibration. The stepless feeding mode continuously modulates vibration intensity based on real-time bucket weight feedback, preventing material overflow while maintaining optimal filling speed for throughput efficiency. This intelligent feeding control ensures consistent weighing performance across materials with varying bulk densities, particle sizes, and flow characteristics, from fine powders like milk powder and seasoning blends to coarse granules like rice, beans, and coffee, adapting to material variations without operator intervention.

The grain weighing machine supports simultaneous weighing of multiple different materials through its multi-material capability, enabling automated blending applications such as sugar-salt mixtures, rice-grain combinations, and specialty seasoning formulations. This multi-material weighing function eliminates separate weighing and mixing operations, reducing equipment investment while improving blend consistency through precise ratio control. The system maintains independent weight targets for each material component, ensuring accurate formulation ratios for food products requiring specific ingredient proportions.

Unlike volumetric cup fillers that vary with material density fluctuations, this gravimetric powder weighing device delivers precise weight-based dosing ensuring regulatory compliance for net weight declarations on food packaging, agricultural seed portioning accuracy, and specialty ingredient specifications across production batches. The food-grade stainless steel construction throughout material contact areas meets FDA food-contact material requirements and sanitary design principles for contamination prevention and easy cleaning. The quick-release bucket design with tool-free disassembly enables washdown cleaning in 8-12 minutes between production runs, supporting allergen control protocols in multi-product food facilities.

Key Features and Machine Characteristics

Highly Integrated Modular Control System with Automatic Amplitude Adjustment

The highly integrated modular PLC control system with intuitive 7-inch touchscreen interface enables storage of 100 preset parameters for different granular and powder products, allowing rapid changeover between production runs of sugar, rice, coffee, seeds, and seasoning powders with saved weighing parameters and vibration settings. The automatic amplitude adjustment function continuously optimizes vibratory feeder intensity based on real-time material flow rates and bucket fill levels, eliminating manual tuning requirements and reducing setup time when changing between materials with different flow characteristics. This intelligent automation reduces operator skill requirements, minimizes weighing errors, and supports efficient multi-product manufacturing in food packaging facilities, agricultural seed packaging operations, and specialty ingredient dosing applications requiring frequent product changes throughout production shifts.

Multi-Material Simultaneous Weighing for Blended Products

The advanced control system supports simultaneous weighing of up to 3 different materials through split-hopper configuration with independent feeding channels, enabling automated blending applications such as sugar-salt mixtures for seasoning granules, rice-grain combinations for multi-grain products, and coffee-chicory blends for specialty beverages. This multi-material capability eliminates separate weighing and mixing operations, reducing equipment investment while improving blend consistency through precise ratio control. The system maintains independent weight targets for each material component, ensuring accurate formulation ratios for food products requiring specific ingredient proportions and specialty mixtures with precise component specifications. Parameters can be modified directly during production operation based on real-time production requirements, providing operational flexibility for batch-to-batch adjustments.

Stepless Vibratory Feeder System for Uniform Material Distribution

The variable-frequency electromagnetic vibratory feeding system with stepless amplitude adjustment provides continuous flow control from gentle trickle feeding for final weight approach to moderate bulk feeding for initial bucket filling. This stepless feeding capability ensures uniform material distribution across all three weighing buckets, preventing uneven loading that causes weighing delays and accuracy variations. The real-time flow control prevents material overflow, reduces product spillage, and minimizes cleaning requirements in production environments. This precise feeding control is particularly valuable for expensive ingredients including premium coffee beans, specialty seeds, milk powder, and high-value granulated products where product loss directly impacts production costs and profitability. The wider weighing range capability accommodates diverse fill weights from small 50g sachets to larger 4000g retail packages.

Optional Pneumatic Gate for Enhanced Precision Dosing

The optional pneumatic gate system installed at vibratory tray outlets provides on-off flow control based on bucket weight feedback, enabling precise final weight approach for small fill weights where continuous vibration feeding may cause weight overshoot. The pneumatic gate opens for bulk material feeding until approaching target weight, then closes for controlled trickle feeding through residual material in the vibratory tray, achieving enhanced accuracy for small-dose applications including specialty seeds, expensive granulated ingredients, and premium portions. This enhanced accuracy capability reduces product giveaway while maintaining consistent fill weights across production batches, generating cost savings in operations packaging premium ingredients.

Food-Grade Stainless Steel Construction with Quick-Clean Design

The stainless steel construction throughout material contact areas including supply hopper, vibratory trays, weighing buckets, and discharge components ensures chemical compatibility with acidic seasonings, alkaline food additives, and specialty ingredients while meeting food-contact material requirements. The sanitary design features including quick-release components enable tool-free disassembly for thorough cleaning between production runs. All material contact parts including storage hopper, discharge hopper, vibratory tray, and weighing buckets feature rapid disassembly capability, facilitating convenient cleaning and supporting allergen control protocols in multi-product food facilities processing different varieties. The easy-clean design minimizes changeover time, supporting efficient production scheduling in facilities requiring frequent product changes.

Ultra-Compact Footprint for Space-Constrained Operations

The three-bucket linear arrangement with 1200mm × 1050mm footprint makes this vegetable weighing machine and hardware weighing device ideal for startup food brands with limited floor space, small production facilities with budget constraints, and operations requiring compact automated weighing solutions. The straight-line configuration simplifies integration with vertical form-fill-seal machines, sachet filling systems, and container dosing equipment through direct material discharge without complex chute routing. The compact design reduces installation costs compared to larger multi-head systems while providing reliable automated weighing performance for production volumes suitable for emerging brands and small-scale manufacturers.

Application Areas

Sugar and Granulated Sweetener Packaging

Food manufacturers utilize this powder weighing device for white sugar packaging in retail bags from 500g to 4000g, brown sugar dosing in consumer packages, and specialty sweetener filling including coconut sugar granules and stevia in premium packaging. The system handles granulated sugar with particle sizes from 0.5mm to 2mm, maintaining ±1g accuracy at various fill weights while processing 30 bags per minute in vertical form-fill-seal operations. The stainless steel construction prevents sugar contamination while the quick-clean design supports frequent washdown in facilities processing multiple granulated sweetener varieties for retail grocery and specialty food distribution markets.

Rice and Grain Weighing for Food Processors

Rice processors and grain packagers deploy this grain weighing machine for rice packaging in consumer bags from 500g to 2kg, premium rice dosing including basmati, jasmine, and arborio varieties, and ancient grain portioning including quinoa, amaranth, and millet in health food products. The system accommodates rice grain lengths from 5mm short-grain to 8mm long-grain varieties, maintaining consistent fill weights across production runs while the gentle vibratory feeding prevents grain breakage. The multi-material weighing capability enables creation of mixed grain products with precise component ratios for specialty food applications.

Coffee Bean and Ground Coffee Dosing

Coffee roasters employ this weighing system for whole bean coffee packaging in retail bags from 250g to 1000g, ground coffee portioning for premium packaging, and specialty coffee dosing for artisan brands. The system handles coffee beans with sizes from 7mm to 12mm and ground coffee powders, maintaining accurate fill weights while the stainless steel construction prevents flavor contamination between different roast profiles. The recipe storage capability with 100 preset parameters enables rapid changeover between light, medium, and dark roasts with different bulk densities, supporting efficient multi-product operations in coffee roasting facilities.

Seed Packaging for Agricultural Applications

Agricultural seed suppliers utilize this linear weighing scale for vegetable seed packaging including tomato, pepper, and lettuce seeds in retail packets from 50g to 500g, flower seed dosing for garden distribution, and herb seed portioning for culinary applications. The system handles seed sizes from 2mm small vegetable seeds to 10mm large bean seeds, maintaining accurate fill weights for regulatory compliance while the gentle handling prevents seed damage affecting germination rates. The compact design fits small seed packaging facilities with minimal floor space requirements.

Milk Powder and Nutritional Powder Dosing

Dairy processors and nutritional product manufacturers deploy this powder weighing device for milk powder packaging in retail containers from 200g to 1000g, infant formula dosing requiring high accuracy, and nutritional supplement powder filling in sachets and bottles. The system handles fine powders with particle sizes below 1mm, achieving ±1g accuracy for precise nutritional dosing while the food-grade construction ensures product purity. The quick-clean design with rapid disassembly supports thorough cleaning between production runs, meeting strict hygiene requirements for dairy and nutritional powder processing.

Seasoning Powder and MSG Packaging

Seasoning manufacturers utilize this weighing scale for MSG packaging in retail bags from 100g to 500g, chicken essence dosing for consumer products, and proprietary seasoning blend filling in specialty packaging. The system handles fine seasoning powders and granules, maintaining ±1g accuracy while the multi-material weighing capability enables automated creation of complex seasoning blends with precise ingredient ratios. The stainless steel construction withstands acidic and alkaline seasoning formulations while the easy-clean design supports allergen control in facilities processing multiple seasoning varieties.

Sesame and Small Seed Weighing

Food processors employ this grain weighing machine for sesame seed packaging in retail bags from 100g to 500g, chia seed dosing for health food products, and flax seed portioning for nutritional applications. The system handles small seeds with sizes from 1mm to 3mm, maintaining consistent fill weights while the gentle vibratory feeding prevents seed crushing. The wide weighing range from 50g to 4000g accommodates diverse package sizes from small sachets to bulk retail bags, serving health food stores and specialty ingredient distribution channels.

Salt and Specialty Salt Packaging

Salt producers utilize this weighing scale for table salt packaging in retail containers from 250g to 1000g, sea salt dosing for gourmet products, and Himalayan pink salt portioning for specialty applications. The system handles salt granules with sizes from 0.5mm fine salt to 3mm coarse crystals, maintaining accurate fill weights while the stainless steel construction resists salt corrosion. The system processes 30 bags per minute, supporting efficient production for retail grocery and gourmet food distribution markets.

Technical Specifications