Granule Weighing Machine - Quadruple Head Linear Scale

Keypack Intelligent Four-Head Linear Weighing Scale is a compact automatic dosing system designed for high-accuracy quantitative weighing of uniform free-flowing granular and powder materials. This linear weighing scale delivers consistent weighing accuracy of X(1) across fill weights from 500g to 4,000g, processing 12-40 weighments per minute depending on target weight and material flow characteristics. Ideal for small to medium-scale manufacturers requiring cost-effective automated weighing solutions for sugar, salt, rice, seeds, coffee, and granulated ingredients in food packaging lines, pharmaceutical dosing systems, and industrial portioning operations.

Product Overview

The Quadruple-Head Linear Weighing Scale operates through a streamlined four-bucket linear configuration where material flows from a central 6-liter supply hopper through electromagnetic vibratory feeders into four 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 compact grain weighing machine provides an economical entry point for automated weighing compared to larger multi-head combination weighers, while maintaining reliable accuracy for consistent free-flowing materials including granulated sugar, rice grains, coffee beans, and uniform-sized seeds in small to medium 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 granular materials with varying bulk densities, particle sizes, and flow characteristics, from fine powders to coarse granules, adapting to material variations without operator intervention.

The innovative free-fall rapid feeding system accelerates initial bucket filling compared to traditional continuous vibratory feeding, reducing cycle time while maintaining weighing accuracy through precision vibratory tray feeding for final weight approach. This hybrid feeding strategy combines speed and accuracy, achieving complete weighing cycles in efficient timeframes depending on target weight and material characteristics. 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, pharmaceutical dosing accuracy requirements, and chemical product specifications across production batches.

The food-grade stainless steel construction throughout material contact areas meets FDA food-contact material requirements, GMP pharmaceutical standards, and sanitary design principles for contamination prevention and easy cleaning. The quick-release bucket design with tool-free disassembly enables washdown cleaning between production runs, supporting allergen control protocols in multi-product food facilities and cross-contamination prevention in pharmaceutical packaging operations.

Key Features and Machine Characteristics

Integrated Modular Control System with Automatic Amplitude Adjustment

The highly integrated modular PLC control system with intuitive 7-inch touchscreen interface enables recipe storage for 100 different products and target weights, allowing rapid changeover between production runs of sugar, rice, coffee, and other granular materials 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 products with different flow characteristics. This intelligent automation reduces operator skill requirements, minimizes weighing errors, and supports efficient multi-product manufacturing in food packaging facilities, contract packaging operations, and pharmaceutical dosing applications requiring frequent product changes throughout production shifts.

Free-Fall Rapid Feeding for Increased Throughput

The innovative free-fall rapid feeding system accelerates initial bucket filling by allowing material to drop directly from the supply hopper into weighing buckets through gravity-assisted flow, reducing filling time compared to continuous vibratory feeding throughout the entire weighing cycle. Once approaching target weight, the system transitions to precision vibratory tray feeding for controlled final weight approach, achieving optimal balance between speed and accuracy. This hybrid feeding strategy enables higher throughput rates while maintaining tight weight tolerances, improving production efficiency in packaging operations processing sugar, salt, rice, and coffee for retail consumer markets.

Multi-Material Simultaneous Weighing Capability

The advanced control system supports simultaneous weighing of up to 4 different materials through split-hopper configuration with independent feeding channels, enabling automated blending applications such as sugar-salt mixtures for seasoning blends, rice-grain combinations for multi-grain products, and coffee blends for specialty beverages. This multi-material capability eliminates separate weighing and mixing operations, reducing equipment investment compared to dedicated weighing systems for each ingredient 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, pharmaceutical blends with active-excipient ratios, and chemical mixtures with precise component specifications.

Stepless Vibrating 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 four 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 and specialty granulated ingredients where product loss directly impacts production costs and profitability, making this an efficient eco-friendly industrial weighing solution.

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 chutes ensures chemical compatibility with acidic seasonings, alkaline food additives, and pharmaceutical ingredients while meeting FDA food-contact material requirements and GMP pharmaceutical manufacturing standards. The sanitary design features including crevice-free welding, sloped surfaces for drainage, and polished finishes preventing material buildup enable thorough cleaning between production runs. The quick-release bucket design with tool-free disassembly (storage hopper, discharge hopper, vibrating tray, weighing bucket) allows washdown cleaning, minimizing changeover time in multi-product packaging operations processing different food varieties, pharmaceutical formulations, and chemical products requiring contamination prevention.

Compact Footprint for Space-Constrained Facilities

The four-bucket linear arrangement provides a compact footprint, making this linear weighing scale ideal for small production facilities with limited floor space, startup operations with budget constraints, and retrofit installations in existing packaging lines. The straight-line configuration simplifies integration with vertical form-fill-seal machines, sachet filling systems, and container dosing equipment through direct product discharge without complex chute routing. The compact design reduces installation costs while providing reliable automated weighing performance for small to medium production volumes.

Flexible Parameter Adjustment During Operation

The control system allows direct parameter modification during production runs based on real-time production conditions, enabling operators to fine-tune weighing accuracy, adjust feeding speeds, and optimize cycle times without stopping the machine. This operational flexibility supports continuous process improvement, reduces downtime during product changeovers, and enables rapid response to material characteristic variations. The intuitive touchscreen interface simplifies parameter adjustment, making the system accessible to operators with varying technical skill levels in food processing, pharmaceutical manufacturing, and industrial packaging environments.

Application Areas

Sugar and Sweetener Packaging for Food Industry

Small to medium food manufacturers utilize this powder weighing device for white sugar packaging in retail bags from 500g to 4kg, brown sugar dosing in consumer packages, and specialty sweetener filling including coconut sugar and granulated alternatives in premium packaging. The system handles granulated sugar with varying particle sizes, maintaining X(1) accuracy while processing 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 sweetener varieties for retail grocery and specialty food distribution markets.

Rice and Grain Weighing for Agricultural Packaging

Rice processors and grain packagers deploy this grain weighing machine for white rice packaging in consumer bags from 1kg to 4kg, specialty rice dosing including basmati, jasmine, and arborio varieties in premium packaging, and ancient grain portioning including quinoa and millet in health food products. The system accommodates rice grain lengths from short-grain to long-grain varieties, maintaining consistent fill weights across production runs while the gentle vibratory feeding prevents grain breakage that reduces product quality. The compact footprint fits small rice milling facilities and grain packaging operations with limited production floor space, serving retail consumer and health food distribution channels.

Coffee Bean and Ground Coffee Dosing for Specialty Roasters

Specialty coffee roasters and small-scale coffee packagers employ this weighing system for whole bean coffee packaging in retail bags from 500g to 2kg, ground coffee dosing in various grind sizes, and single-origin coffee portioning for premium packaging. The system handles coffee beans maintaining accuracy for premium coffees while the stainless steel construction prevents flavor contamination between different roast profiles. The recipe storage capability enables rapid changeover between light, medium, and dark roasts with different bulk densities, supporting efficient multi-product operations in specialty coffee roasting facilities.

Seed Packaging for Agricultural and Garden Supply

Agricultural seed suppliers and garden product distributors utilize this vegetable weighing machine for vegetable seed packaging including tomato, pepper, and lettuce seeds in retail packets, flower seed dosing for garden center distribution, and herb seed portioning for culinary gardening applications. The system handles seed sizes from small vegetable seeds to large bean seeds, maintaining accurate fill weights for regulatory compliance while the gentle handling prevents seed damage affecting germination rates. The stainless steel construction withstands agricultural environment conditions while the compact design fits seed packaging facilities with limited floor space.

Pharmaceutical Powder and Granule Dosing

Pharmaceutical manufacturers utilize this precision weighing system for active pharmaceutical ingredient (API) dosing in sachets and bottles, nutraceutical powder packaging for dietary supplements, and vitamin granule portioning for consumer health products. The system maintains X(1) weighing accuracy required for pharmaceutical dosing compliance while the GMP-compliant stainless steel construction and quick-clean design support contamination prevention protocols. The multi-material capability enables automated formulation of combination products with precise ingredient ratios for pharmaceutical blends.

Seasoning and Spice Packaging for Food Processing

Seasoning manufacturers and spice processors employ this powder weighing device for MSG packaging, chicken essence dosing, seasoning powder portioning, and spice blend filling in retail containers from 500g to 2kg. The system handles fine powders and granulated seasonings maintaining consistent fill weights while the sealed design minimizes dust generation during filling operations. The multi-material weighing capability enables automated creation of custom spice blends with precise component ratios for consistent flavor profiles across production batches.

Milk Powder and Nutritional Powder Packaging

Dairy processors and nutritional product manufacturers utilize this weighing system for milk powder packaging in retail containers, infant formula dosing requiring high accuracy, and protein powder portioning for sports nutrition products. The system handles fine powders with care to minimize dust generation while maintaining weighing accuracy for nutritional labeling compliance. The food-grade stainless steel construction and sanitary design meet dairy processing standards while the quick-clean capability supports allergen control in facilities processing multiple dairy and non-dairy formulations.

Hardware and Industrial Component Weighing

Industrial packagers utilize this hardware weighing device for small fastener packaging including screws, nuts, and bolts in retail containers, plastic pellet dosing for industrial supply, and small component portioning for hardware distribution. The robust construction withstands industrial environment conditions while maintaining weighing accuracy for inventory control and customer satisfaction. The system handles components with varying shapes and densities, providing reliable automated weighing for industrial packaging operations serving hardware retail, manufacturing supply, and e-commerce distribution channels.

Optional Devices and Customization

The Keypack Intelligent (Kunbupack) linear weighing scale offers optional enhancement devices including dimpled scale hopper for improved material flow, collecting hopper for batch accumulation, data printing device for production documentation and traceability, and overweight sorting device for quality control and waste reduction. These modular additions enable customization for specific production requirements, integration with existing packaging lines, and compliance with industry-specific documentation standards in food processing, pharmaceutical manufacturing, and industrial packaging applications.

Technical Specifications