High Performance
Feed Screws & Barrels

Future Design's High Performance Feed Screws are custom designed around the individual resin's melting behavior using the latest screw design software available. This increases the feed screw's output rate and eliminates the possibility of over-shearing. Older screw designs may have low output rates or high melt temperatures causing temperature over-ride in the die zones. This heat comes from worn or inefficient screws that over-shear the resin they are processing, resulting in slower line speeds, because more cooling is required.

Performance Parameters:

Lower melt temperature reduces melt cooling requirements
Less cooling means higher line speeds
Lower axial pressure improves life of feed screw and increases output
Excellent melt quality and mixing at high output rates
Melt temperature difference across the exiting extruder melt stream is 5-7°F
Improved mixing/melt homogenization
New screws are covered by a one year warranty against defects in materials and workmanship

Standard Feed Screw Construction Features:

Chrome plating in root
Wear resistant full flight width Colmonoy 56, 83, X830, or UCAR
Spiral or straight Maddock mixing section for dispersive mixing
Pineapple, Saxton, or pin mixing section for distributive mixing
Highly polished streamlined surfaces
High quality materials and construction (manufactured from aircraft quality 4140, 4340, stainless steel or Duranickel)

Standard Barrel Construction Features:

Bimetallic construction
Guaranteed straightness of 1 in 20,000
58-64 Rockwell C
Finish to within 8-12 micro-inches
Enhanced abrasion and corrosion resistance

Below are some process specifications for our screws.
The data is for smooth bore extruder feed screws.

Screw Size (in)	Material	Specific Output (lbs/hr/rpm)	True MT (°F)*	Back Pressure (PSI)
2.5	1 MI LLDPE	4.4	420	4550
3.0	mLLDPE	5.3	410	5500
3.5	1 MI LLDPE	8.3	409	5200
3.5	mLLDPE	9.2	415	5700
4.5	1 MI LLDPE	17	425	5200
4.5	60% LLDPE /40% LDPE	15	410	4500

Screw Size (mm)	Material	Specific Output (kg/hr/rpm)	True MT (°C)*	Back Pressure (BAR)
63.5	1 MI LLDPE	2.00	216	314
76.2	mLLDPE	2.40	210	379
88.9	1 MI LLDPE	3.76	209	359
88.9	mLLDPE	4.17	213	393
114.3	1 MI LLDPE	7.71	218	359
114.3	60% LLDPE /40% LDPE	6.80	210	310

* The true melt temperature is measured using a variable depth melt temperature thermocouple. The temperature probe is extended across the melt stream of the adaptor after the exit of the extruder and readings are taken every 1/8". These readings indicate the cross channel melt temperature gradient across the adaptor. There should not be a difference of more than 5°F from coldest to hottest across the exiting extruder melt stream. If the adaptor temperature setting gets too high, or the gradient is too high, greater than 5°F, then the screw is generating too much shear and the melt is too hot resulting in temperature over riding on the die zones and requiring greater cooling downstream.

Please contact Future Design if you have any questions,
or if you would like a quotation for Feed Screws

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futurecan@saturn2.com

High Performance Feed Screws & Barrels

Performance Parameters:

Standard Feed Screw Construction Features:

Standard Barrel Construction Features:

High Performance
Feed Screws & Barrels