Browse Prior Art Database

Adjustable Gap Extrusion Die

IP.com Disclosure Number: IPCOM000048106D
Original Publication Date: 1981-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Parzanici, R: AUTHOR [+4]

Abstract

A plurality of differential screws provide adjustment of selected portions of an elongated extrusion die opening by virtue of the flexing of one of the die's metal gap establishing surfaces.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 86% of the total text.

Page 1 of 2

Adjustable Gap Extrusion Die

A plurality of differential screws provide adjustment of selected portions of an elongated extrusion die opening by virtue of the flexing of one of the die's metal gap establishing surfaces.

Extrusion die 10 is formed of two metal members 11 and 12. Member 11 includes a coating liquid inlet 13 and a tapered depth coating liquid reservoir 14. Coating liquid is supplied to inlet 13 at above atmospheric pressure. Member 12 is secured to member 11 by a plurality of bolts 15, and when so secured, reservoir 14 is sealed, with the exception of linear die opening 16. The underside of member 12 (not shown) comprises of planar surface.

This die opening cooperates with a traveling web of material (not shown) and operates to coat the adjacent surface of the web with coating liquid.

Member 12 includes a U-shaped channel 17 which extends parallel to die opening 16. The bottom surface 18 of this U-shaped channel comprises of flexible section which facilitates adjustment of the size of die opening 16. This size is usually in the range of a few thousandths of an inch.

More specifically, a plurality of differential screws 19 are threaded into portions 20 and 21 of member 12 which define the opposite sides of the U- shaped channel. Portion 20 is nonmoveably attached to member 11 by bolts 15. Thus, rotation of any given screw 19 operates to move only its portion 21 of member 12 relative the adjacent portion of member 11.

In this manner, the size of die o...