Method and apparatus for processing elastomer composite

Patent metadata

Field	Value
Publication number	US-10730211-B2
Application number	US-201715821796-A
Country	US
Kind code	B2
Filing date	Nov 23, 2017
Priority date	Jan 14, 2013
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A method and configuration for automated operation of a two-roll mill. Also provided is a method for continuous or semi-continuous operation of a two-roll mill.

First claim

What is claimed is:

1. In a two-roll mill for processing viscoelastic material, the two-roll mill comprising first and second parallel rolls having a nip therebetween, the nip having a vertical dimension v defined by the distance from a center plane of the two-roll mill to a tangent plane of the two-roll mill, the nip further having a first horizontal dimension h defined by the distance between the rolls on the center plane and a second horizontal dimension defined by the distance between the first and second rolls on the tangent plane, the improvement comprising:
the two-roll mill further comprises a bank guard having first and second concave edges defining a protruding portion therebetween, the protruding portion having an edge, wherein the first and second concave portions are configured such that the first concave edge is disposed from 3 h to 5 h from a portion of the surface of the first roll disposed within the nip and the second concave edge is disposed a distance of about 3 to about 15 mm from a portion of the surface of the second roll disposed within the nip, and wherein the protruding portion extends into the nip towards the center plane to allow, during operation of the roll mill, advancement of viscoelastic material disposed between the center plane and the edge of the protruding portion past the bank guard; and
the two-roll mill further comprising two knives disposed proximate to the first roll and configured to, during operation of the two-roll mill, cut an output strip of viscoelastic material disposed on the first roll, wherein the bank guard is spaced a predetermined distance from a plane perpendicular to the center plane and disposed midway between the two knives, and wherein the predetermined distance is from about 33% to about 90% of the diameter of the first roll.

2. In the two-roll mill of claim 1 , wherein the bank guard further comprises a cutaway edge adjacent to the first concave edge, wherein a limit between the cutaway edge and the first concave edge defines an angle with the center plane and wherein the angle is from about 60 to about 90 degrees.

Assignees

• Cabot Corp

Inventors

• Grosz Ron
• Gooch Lawrence R

Classifications

• B29K2019/00

  Use of rubber not provided for in a single one of main groups {B29K2007/00 - B29K2011/00,} as moulding material · CPC title

• B29B7/724

  for continuous roller mixers, e.g. calenders (B29B7/722 takes precedence) · CPC title

• B29C43/245

  Adjusting calender parameters, e.g. bank quantity · CPC title

• B29C43/24

  Calendering · CPC title

• B29C43/006

  Pressing and sintering powders, granules or fibres · CPC title