Additive Feeders
(Colorant Metering Systems)

Additive Feeders (Colorant Metering Systems), supplied by Future Design, meters colorants/additives directly into the polymer extruder. The unit is a self-contained, highly versatile metering system for precise introduction of free-flowing plastics colorants or additives to base resins as they flow into your processing machine throat. It will eliminate off-machine tumble mixing, spillage, waste and pre-mixed inventories and provide an economical, reliable method to custom blend materials just before processing. A variable-speed, D.C. motor powers a selected metering auger that volumetrically feeds colorants or additives upon a signal in conjunction with extruder speed.

Selection of augers to match production:

Metering augers are available from 1/2" to 2" diameter to vary letdowns in accordance with shot size or extrusion rates and material type. A sampling port is provided for timed calibration of the unit during initial set-up.

It contains a variety of mounting possibilities. A colorant/additive supply bin is provided which can be automatically loaded or hand filled. The bin and metering auger mount on a special throat adapter. The bin can be removed easily for cleaning. The throat adapter mounts between the material hopper and the machine throat. Two units can feed through one adapter. By simply bolting two throat adapters together, multiple metering units can be mounted on one machine. This arrangement provides for different additives to be fed at one time, or provides nearly instant color changes on a single machine without shut down for cleaning.

Colorant/Additive Metering System
Direct feed to Extruder throat

Colorants or additives may be metered during a selected phase of the machine cycle. For machines with good mixing screws and a long l/d screw ratio, the throat adapter mounts directly over the throat. For machines with small l/d ratio or little mixing capability, an Inline Mixer is recommended.

Courtesy of Hamilton Avtec

Please contact Future Design if you have any questions,
or if you would like a quotation for an Additive Feeder (Colorant Metering System).

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