Browse Prior Art Database

Extruding Press Screw

IP.com Disclosure Number: IPCOM000059819D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Dorn, M: AUTHOR [+3]

Abstract

This injection molding press screw can be disassembled to replace the seals.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

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Extruding Press Screw

This injection molding press screw can be disassembled to replace the seals.

Screw 10, which rotates about axis 11 when in an injection molding machine, includes removable, bolt-like parts 12, 13 and 14. These parts are separated by thin Teflon (E.I. du Pont de Nemours & Co.) seals 15.

Seal 16 comprises a thick belt-like seal 17, also made of Teflon, and an O- ring rubber seal 18 which rotates with screw 10. Seal 16 is called a static seal in that it does not rotate with screw 10.

This press screw is of particular utility when injection molding a low viscosity, abrasive material, resulting in the need to replace the seals at frequent maintenance intervals.

Disclosed anonymously.

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