Granules loss-in-weight feeder Truefeed™ TF

for plastic pelletsgravimetricfor the plastics industry

Overview TrueFeed TF gravimetric feeders provide precise, weight-based control of virgin resin, regrind, color concentrate, and additives for injection molding, extrusion, and blow molding. Using continuous gravimetric measurement rather than volumetric estimation, the TrueFeed TF series maintains accurate material ratios throughout production, reduces material waste, improves part consistency, and delivers repeatable process control. Each production run generates complete material usage and dosing history to support process traceability, quality assurance, and production reporting.

How the TrueFeed TF works The TrueFeed TF uses continuous loss-in-weight metering technology. A precision dispense cylinder driven by a stepper motor delivers material at a consistent, controlled rate while a closed-loop control system monitors weight in real time and automatically adjusts feeding speed to maintain the target ratio. Unlike volumetric feeders, TrueFeed measures actual weight dispensed so it self-corrects for changes in bulk density, pellet size, or material flowability, producing a non-pulsing, highly accurate feed stream.

Key functional benefits

• Continuous loss-in-weight metering for accurate, weight-based dosing
• Precision dispense cylinder (stepper motor driven) for non-pulsing delivery
• Self-correcting closed-loop control that compensates for material variations
• Eliminates time-consuming volumetric color calibration during material changes
• Fast, tool-less changeovers: release knob to remove feeder, drain hopper via slide gate, release motor clamps and remove motor and dispense cylinder
• Generates complete material usage and dosing history for traceability and reporting

Applications Designed for injection molding, extrusion (tube, pipe, film, sheet), and blow molding; handles engineering and commodity resins and can be configured for regrind, concentrate, and additive components.

Control and integration TrueFeed TF uses a bilingual, user-friendly control and integrates with Conair FLX-128 Plus gravimetric material handling control for centralized monitoring and recipe management. It can be paired with upstream ResinWorks central drying systems and downstream Wave Conveying technology for a fully integrated material handling solution.

Options

• Compressed air loading lid — Compressed air loading for processing granular pellets.
• Throat adapters — Variety of throat adapters available to fit processing machines (standard adapter 76 mm diameter inlet, 45 mm square outlet).
• Compressed air vacuum loading lid — Vacuum loading option for dusty or granular materials; increases pulling power and includes a dust/fines filter; vacuum generated with compressed air.
• Water-cooled throat adapter — Provides temperature isolation from hot dried material when combining temperature-sensitive additives.
• Dispense cylinder — Non-pulsing dispense cylinders available in several sizes; quick and easy change-out for cleaning and higher accuracy than auger screws.
• Alarms (visual and/or audible) — Alarm light and/or horn available to alert operator to low material level.

Frequently Asked Questions (selected)

• Q: What is a gravimetric blender and how does it differ from a volumetric blender? A: A gravimetric blender uses load cells to measure actual weight of each component as dispensed, providing real-time ratio confirmation and automatic correction. Volumetric blenders control by volume (auger turns or valve timing) and cannot detect variations in bulk density or pellet size.
• Q: What plastics processes is the TrueFeed TF designed for? A: Injection molding, extrusion (including tube, pipe, film, sheet), and blow molding; suitable for a range of resins and configurable for regrind, concentrate, and additives.
• Q: What is the difference between gravimetric blending and loss-in-weight feeding? A: Gravimetric blending dispenses each component in a batch sequence then combines them; loss-in-weight feeding is continuous, weighing a hopper and controlling output rate to maintain target weight-loss-per-unit-time. TrueFeed TF supports both configurations depending on requirements.
• Q: How does the TrueFeed TF integrate with other Conair equipment? A: TrueFeed TF connects to Conair FLX-128 Plus for centralized monitoring and recipe management and pairs with ResinWorks drying and Wave Conveying for a full material handling system.
• Q: What control system does the TrueFeed TF use? A: A bilingual user-friendly control; integrates with FLX-128 Plus for centralized, multi-station control and recipe management.

Resources (product)

• TrueFeed TF Models Manual (product manual referenced on the product page)
• Full Spec Sheet (TPBX034 — TrueFeed TF Models PDF spec sheet)

Technical specifications

• Metering principle: continuous loss-in-weight (gravimetric) metering
• Dispense mechanism: precision dispense cylinder driven by stepper motor (non-pulsing)
• Control: bilingual, user-friendly local control; integrates with FLX-128 Plus for centralized control and recipe management
• Data & traceability: complete material usage and dosing history for each production run
• Changeover: tool-less feeder removal and dispense cylinder/motor removal for fast cleaning and material changes
• Process compatibility: injection molding, extrusion (tube, pipe, film, sheet), blow molding; supports virgin resin, regrind, color concentrates, additives
• Options: compressed-air loading lid, compressed-air vacuum loading lid, throat adapters (including water-cooled), multiple dispense cylinder sizes, visual/audible alarms