Bulk Bag Unloader with Loss-in-Weight Feeder

Bulk Bag Unloader with Loss-in-Weight Feeder for Precision Powder Handling

Key Features of the Bulk Bag Unloader + Loss-in-Weight Feeder

Clean, Safe, and Dust-Tight Big Bag Discharging

• Enclosed docking station with inflatable seal and dust extraction port ensures dust-free big bag unloading.
• Integral bag tensioning frame and lifting hoist enable fast changeovers and safe handling of 500–2000 kg FIBCs.
• Optional bag massager, vibration pads, and flow aids loosen compacted materials and prevent bridging.

High-Accuracy Gravimetric Dosing (Loss-in-Weight)

• Industrial load cells and PID control loop deliver precise setpoint control with typical accuracy up to ±0.2–0.5%.
• Continuous mass-flow measurement compensates for bulk density variations, ensuring stable feed to downstream processes.
• Auto-tare and refill logic maintain uninterrupted feeding during bag change or hopper refill.

Materials of Construction and Hygienic Design

• Contact parts in stainless steel (SS304/SS316L optional) with smooth finishes to minimize residue and cross-contamination.
• Food- and pharma-ready options: sanitary welds, CIP spray balls, FDA/EC-compliant gaskets, and crevice-free joints.
• ATEX/IECEx configurations available for handling combustible dusts with grounded components and explosion venting interfaces.

Versatile Feeding Technologies

• Choose screw feeder (single or twin), spiral/auger, or vibratory tray based on flow behavior from free-flowing to cohesive powders.
• Agitation hoppers, flexible liners piercing device, and de-lumping screens improve flowability and product consistency.
• Integrated check sieve or magnet trap to protect downstream extruders, mixers, or reactors.

Smart Controls and Connectivity

• PLC/HMI with recipe management, auto-diagnostics, alarm history, and batch reporting for full traceability.
• Analog/digital I/O and industrial Ethernet (Profinet/EtherNet/IP/Modbus TCP) for DCS/MES integration and remote monitoring.
• Optional data logging, OEE dashboard, and e-signature-ready audit trail for regulated industries.

Application Areas

Building Materials and Construction Chemicals

• Cement additives, tile adhesives, dry mortar, gypsum, calcium carbonate, and silica powders.
• Dust-tight unloading and accurate dosing stabilize mix ratios, reduce waste, and improve downstream mixer consistency.

Plastics, Compounding, and Masterbatch

• PVC/PP/PE resins, functional fillers, TiO2, carbon black, flame retardants, and stabilizer systems.
• Gravimetric loss-in-weight feeding ensures consistent extrusion quality and color masterbatch dispersion.

Automotive, Battery, and Advanced Materials

• Cathode/anode powders, conductive carbon, graphite, and specialty additives requiring high-precision dosing.
• ATEX-ready options and enclosed transfer minimize contamination and operator exposure.

Food, Feed, and Nutraceuticals

• Sugar, starches, protein isolates, premixes, vitamins, and micro-ingredients.
• Hygienic stainless steel build with sanitary seals supports HACCP and GMP compliance.

Chemicals and Detergents

• Surfactants in powder form, zeolites, soda ash, and specialty chemicals with challenging flow properties.
• Flow aids and de-lumping improve reliability and reduce manual intervention.

Technical Specifications

Performance and Capacity

• Bag size: 500–2000 kg FIBC (Type A/B/C/D as required).
• Feeding range: 5–5000 kg/h depending on feeder type, screw pitch, and material characteristics.
• Accuracy: Up to ±0.2–0.5% of setpoint in steady-state loss-in-weight mode.
• Refill/auto-tare: Intelligent refill algorithm maintains continuous dosing during bag change.

Equipment Configuration

• Unloader frame: Heavy-duty steel with integrated hoist or forklift pockets; adjustable height for various FIBC sizes.
• Docking system: Inflatable neck seal with glove box or clamp ring; dust extraction port and liner tension device.
• Flow assistance: Bag massagers, vibration, air pads, and mechanical agitators to prevent ratholing and bridging.
• Feeder options:
  • Single/twin screw feeder for fine powders and cohesive materials
  • Vibratory feeder for granules and fragile products
  • Quick-release screw and tool-free disassembly for cleaning
• Weighing system: High-resolution load cells with anti-vibration mounts and digital filtering.
• Safety: Interlocked access doors, emergency stop, level sensors, overfill and negative pressure protection.

Controls and Integration

• PLC/HMI: 7–10″ touchscreen with recipe storage, batch/continuous modes, trending, and alarm logs.
• Communications: Profinet, EtherNet/IP, Modbus TCP; optional OPC UA/MQTT for IIoT.
• Compliance: ATEX Zone 21/22 options, CE marking, UL/NEMA enclosures on request.

Energy and Utilities

• Power: 3-phase 380–480V, 50/60 Hz; typical installed power 2–12 kW depending on feeder, hoist, and auxiliaries.
• Air: 0.5–0.7 MPa for inflatable seals and pulse-jet dust collection if equipped.
• Dust control: Integrated or centralized dust collector interface; HEPA options for fine powders.

Customer Case

Customer Recognition and Market Validation

Proven Results in Real Production

• Building materials plants report up to 30% reduction in material loss and more stable mortar consistency due to precise dosing.
• Plastics compounders achieve tighter additive ratios, improving color consistency and reducing extrusion defects.
• Battery materials manufacturers highlight reduced operator exposure and better batch-to-batch reproducibility.

High Satisfaction and ROI

• Maintenance teams value quick-release screws, sanitary design, and easy liner handling that cut cleaning time by 40–60%.
• Operations praise dust-tight unloading and automatic refill logic that increases uptime and throughput.
• Management notes lower kWh per ton and improved traceability, accelerating audits and customer qualification.

Why Choose Our Bulk Bag Unloader with Loss-in-Weight Feeder?

Innovation, Accuracy, and Compliance

• Integrated design delivers dust-free big bag emptying with closed-loop gravimetric control for stable, compliant operations.
• Configurable feeder technologies and ATEX/hygienic options cover a wide range of powders from free-flowing to cohesive.
• Competitive total cost of ownership with high accuracy, low maintenance, and seamless line integration.