Volumetric dosing feeder BF series

augervacuumfor granulates

Overview
Conair BFS and BFH at-the-throat volumetric feeders meter colorants and pelletized additives directly into the machine throat for injection molding and extrusion. Direct throat feeding reduces inventory of pre-colored resins and enables accurate, on-demand pigment dosing at the process inlet.

Features

• BFH: combination removable hopper and auger assembly for fast, tool-free cleanout and changeover.
• BFS: compact footprint with optional quick-release hopper including electrical interlock and slide gate for rapid removal and cleaning.
• Tool-free access and easy cleanout across models to speed color changes and maintenance.

Performance / Throughput (FAQ summary)

• Metering range (BFS/BFH): from approximately 0.01 g/s up to about 160 lb/hr for low- to mid-throughput needs.
• BFH high-throughput capability: up to 100 g/s or roughly 800 lb/hr for heavy-duty applications.
• Control modes: injection/precision control for on-demand dosing via press signal; extrusion control for continuous metering synced to extruder speed.

Options

• Precision Feeder Control for injection molding: contact-closure or voltage-triggered on-demand metering. Available voltages 120 VAC, 240 VAC, 24 VDC; digital timer and thumbwheel speed settings.
• Extrusion Control: continuous operation, feeder speed slaveable to extruder via DC voltage follower (0–600 VDC) or 4–20 mA input.
• Self-contained vacuum loader option: automatically refills additive hopper with color concentrate or pellets.
• DustBeater loader options: standard loading to 500 lb/hr; brushless DustBeater option to 1000 lb/hr for high-rate loaders.
• Low level alarm kit: factory-ordered or field-installable on feeder control packages.

Resources

• BFS & BFH product manual
• Full equipment catalog
• Detailed specification sheet for BFS and BFH models

Model Comparison and Related Info
Choose BFS for compact installations and quick color-change operations; select BFH when higher throughput and removable hopper/auger cleanout are required. Multiple control and loading accessories allow matching feeders to injection molding or extrusion process demands.

Technical specifications

• Designation: BFS and BFH at-the-throat volumetric feeders
• Function: volumetric metering of colorants and pelletized additives at the machine throat
• Throughput ranges: down to 0.01 g/s; BFS/BFH up to ~160 lb/hr; BFH high-throughput up to ~100 g/s or ~800 lb/hr
• BFH: removable supply hopper and auger, tool-free removal for rapid cleanout
• BFS: compact design; optional quick-release hopper with electrical interlock and slide gate
• Precision Feeder Control: supports contact closure or voltage trigger; 120 VAC, 240 VAC, 24 VDC; digital timer and thumbwheel speed control
• Extrusion Control: continuous operation, slaveable to extruder via DC follower (0–600 VDC) or 4–20 mA
• Loader and dust handling: self-contained vacuum loader option; DustBeater standard to 500 lb/hr, brushless DustBeater option to 1000 lb/hr
• Accessories: low-level alarm kit and various control/loading accessories to suit application needs