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MGF Gravimetric Feeders

Robust hardware, integrated with industry-leading software control to achieve repeatable consistent dosing accuracy.

  • Unique twin load cell technology
  • Dosing accuracy ± 0.2% on 1% setting
  • Feeder ideal for all molding and extrusion processes

Gravimetric Accuracy

Return on Investment 

  • MGF software and hardware reduce waste of colorants and additives drastically.
  • Maguire Gravimetric Feeders eliminate manual handling and mixing and reduce operation costs.
  • Save typically 30% on masterbatch costs compared to manual or volumetric dosing.

Twin Load Cells

  • Lightweight aluminum hopper mounted on 2 load cells which measure the weight of the hopper and the material ONLY.
  • Continuously monitors the loss-in-weight as material is dosed and automatically adjusts flow rate.
  • Measuring only the hopper and masterbatch allows for finer resolution load cells versus weighing complete feeder assembly and motor. This achieves maximum accuracy and control.

Accuracy of ± 0.2%

  • Automatic, continuous updates to flow rate calibration during production process.
  • Stepper motor provides high resolution control to dose masterbatch accurately to ± 0.2%.
  • Choice of dosing screws combined with software control provide industry-leading accuracy.

PRIME Calibration (patented)

  • Fast-track calibration on startup. Fully automatic and ready within seconds.
  • Primes screw and barrel with material, ready to start production.
  • Quicker startups and reduced scrap rates.

100% Injection Coloring (patent pending)

  • For critical additives, masterbatches and tints.
  • All material in injection molding machine barrel is now colored and gaps are eliminated. No scrap. 
  • Ideal for fast cycling / small shot weight applications.

Build your Knowledge | How to Dose Consistently in just 5 Minutes:

Pioneer in Gravimetrics

Robust Construction

  • 30+ years of experience in gravimetric dosing technology & control.
  • MGF Gravimetric Feeder has robust hardware integrated with industry-leading software control to provide consistent accuracy that is simple and easy to use.

5 Year Warranty

  • Industry leading, comprehensive 5 Year Warranty.
  • Warranty as robust as the feeder system.

Modular Design

  • Modular design allows key components to lock together easily.
  • Easily disassembled for cleaning and reassembled for next job - no tools required.

Simple Set up 

The MGF operates in 3 simple steps: 

  1. Ready - Load material hopper with masterbatch.
  2. Set percentage setting (LDR): in shot weight or lb/h (kg/h).
  3. Go - Automatic calibration and error correction. 

Guaranteed feed rate held within ± 0.2% of the desired setting (LDR).

Fast Cleaning and Material Change Over

  • Hopper fitted with quick release latches.
  • Empty unused material, quick clean, start next job. 

Touchscreen Control Option

  • Each feeder is equipped with a user-friendly control system.
  • Quick set up and start ups.
  • Comes as standard or 7’’ touchscreen controller.

Various Options Available 

Range of options and accessories to suit every time of installation and application. 

  • Installation flanges.
  • Remote controller kit.
  • Remote alarm.
  • Choice of screw sizes.
  • MGF Venturi Loader System.
  • MPM pre mixer for automatic and continuous mixes of masterbatch with main materials.
  • High heat option for use with materials like PET, where primary material is above 230⁰ F /110⁰ C.

Built for Every Application

Feeders for Molding Applications

Continuous Accuracy

100% Injection Coloring

  • When accuracy for the entire shot is essential for critical additives, colors and tinting. 
  • 2 signals - screw back / recovery signal AND Injection signal.
  • 75% dose on recovery, 25% dose on injection. 

Machine Integration MGF Configuration - ST vs. STV

  • MGF ST: Typically newer injection molding machines and extrusion lines.
  • MGF STV: Typically older injection molding machines.

Feeders for Extrusion Applications

Complete Extrusion Control

Extrusion Control Modes: 

  • Continuous - Feeder automatically doses according to extrusion throughput reference entered into control. 
  • Extrusion Following - Feeder follows 0-10 V interface signal of extruder to ensure correct setting as throughputs increase / decrease. 
  • LIW - Follows complete process data from LIW live. Loss in weight updates process consumption every second.

Savings up to 10% via Yield Control for Extrusion Processes

  • Automatic extrusion control versus manual regulation.
  • Reduced start-up material waste & changeover scrap.
  • Immediate control by responding to actual material consumption versus required target.

What Makes the MGF Unique?

1. Suited to all Extrusion & Molding Processes

Automatic calibration, easy access, vibration management built into software.

3. Installation Flanges

Choices according to type and machine installation.

5. Standard or Touchscreen Controller

Robust software with quick, simple to understand graphics to make set up quick and easy.

7. Screw, Barrel & Stepper Motor

Designed to minimize pulsating effects. Choice of screw conversion kits for molding and extrusion.

12345678Photo of MGF Gravimetric Feeders

2. MGF Hopper

Powder coated, aluminium hopper. Low weight with maximum capacity for additive and masterbatch.

4. Venturi Loader System

Easy, cost effective loading of material, controlled by MGF controller.

6. Twin Load Cell Deck

Only weighs the hopper and the material present inside. Avoid cantilever effects, providing consistent readings in production.

8. Self-Priming Control

Instant calibration - MGF fully automatic and ready within seconds.

Molding Applications


Extrusion Applications


Control Modes

ModelProcessOperation ModeInterface
MGF-X-STMoldingCycleDry contact to monitor screw recovery time automatically. 
24 V to 120 V signal interface to monitor screw recovery time automatically.
100% Color Inject feature, monitors screw back & inject signals.
ExtrusionContinuousFeeder automatically doses according to extrusion throughput reference entered in control. 
Extrusion FollowingFeeder follows 0-10 V interface signal of extruder to ensure correct setting as throughputs increase / decrease.
LIWFollows complete process data from LIW live. 

MGF Options

Machine Mounting FramesMGF-3-*, MGF-4-*, MGF-8-*

SGF: Standard adaptor, with large flat base. Suited to larger extruders and injection / blow molding machines.

OPF-MKT: Suited to medium sized extruders and injection / blow molding machines.

OPF-P40: Suited to small injection / blow molding machines.

*Choices according to type and machine installation. Please state with order which adaptor is required, no additional charge.

MGF Automatic Venturi Loader SystemMGF-3-*, MGF-4-*, MGF-8-*

Cost effective loading solutions, ensures dosing accuracy of ± 0.2% of set point. Loader is automatically activated by the MGF controller.

MGF-ST Remote Controller KitsMGF-3-*, MGF-4-*, MGF-8-*
For remote mounting of controller box, up to 20 ft (6 m) length.
MGF Screw Conversion KitsMGF-3-*, MGF-4-*, MGF-8-*
Choice of conversion kits for molding and extrusion applications.
High Heat OptionMGF-3-*, MGF-4-*, MGF-8-*
For use with materials like PET, where primary materials temperature is above 230 °F / 110 °C.
MPM Pre Mixer OptionMGF-3-*, MGF-4-*, MGF-8-*
For automatic and continuous mixes of masterbatch.
Remote AlarmMGF-3-*, MGF-4-*, MGF-8-*
Allows alarms to be reported, controlled and managed from remote locations.