Andruss-Peskin Corporation
Manufacturer's Representative for New England and Upstate New York

Why Plastics Industry Feed Screws are Designed the Way They Are

Why Feed Screws Designed That Way

The selection of the proper screw for a given injection molding or extrusion application can be critical to its success.

Screw geometry — length-to-diameter ratio, profile, channel depth, compression ratio, helix angle and a host of special design features — has everything to do with how well the screw performs in a given application.

There are documented applications where customers have improved production rates or reduced cycle times by 30 or 40% simply by switching to an improved screw design. Similarly, reject rates have been lowered from more than 4-6% to less than 1% by incorporating a custom designed mixing screw. And experience shows that the amount of color concentrate required to achieve optimum color mix can be typically reduced from 4% (of the total blend) to 2%, just by using an optimized screw design. When considering resin and concentrate costs, payback for an optimized screw and non-return valve design can be almost immediate.

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Andruss-Peskin Corporation
41 Westech Drive
Tyngsboro, MA 01879

Phone 508-351-6200
Fax 508-351-6207
E-Mail: sales@a-pcorp.com

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