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Contact nip roll

A technology of contact pressure and pressure roller, which is applied in the system field of rolling and clamping web materials, assembling improved contact pressure rollers, improved contact pressure rollers, and clamping web materials, which can solve the problems of web depression and web material Wrinkling, permanent web distortion, etc.

Inactive Publication Date: 2012-07-04
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This web stress can propagate through the web path causing web troughing, web wrinkling and eventually permanent web distortion

Method used

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  • Contact nip roll
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0049] Example 1-Manufacturing of improved contact nip roller

[0050] In each end of a 24" long aluminum tube with an outer diameter of 3.50 inches (8.89cm) and an inner diameter of 2.00 inches (5.08cm), a bearing with a diameter of 2.626 inches (6.670cm) and a depth of 0.4375 inches (1.111cm) is machined The inner hole of the bearing is used for the bearing that can receive a shaft with a diameter of 1.50 inches (3.81cm). The outer diameter of the tube is cut to be concentric with the inner diameter of the inner hole of the bearing. It will be 3.125 inches (7.937cm) in diameter Six equally spaced #10-32 threaded holes on the bolt circle are attached to each end of the tube.

[0051] The first compliant layer is coated on the tube. The first compliant material is a 0.75 inch (1.91 cm) thick elastomer coating of neoprene with a hardness tester hardness 30 provided by SI Industries, Inc., Blaine, MN, which is applied to the outside of the tube . Laser cut multiple rings with an ...

example 2

[0057] Example 2-Simulation of improved contact nip roller

[0058] The simulated improved contact nip roll shows that the cross web contact and pressure changes caused by the web thickness changes can be minimized. Several different nip pressures and web thicknesses were tested, indicating that the improved contact nip roll produces smaller contact area changes.

[0059] A 0.125 inch (0.3175 cm) thick sheet of urethane with a hardness tester hardness of 80 was wrapped around the partially finished nip roll of Example 1 to simulate a second compliant material coating. The simulated improved contact nip roller is set in a fixed bearing housing, and a 4-inch (10.16cm) diameter aluminum nip roller is actuated and pivoted by two 3.25 inch (8.255cm) inner diameter pneumatic cylinders. A nip force is applied between the two rollers. The pressure is released, and a cast polyethylene terephthalate (PET) sheet with a thickness of 0.030 inches (0.762 mm) to 0.062 inches (1.575 mm) is ins...

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Abstract

An improved contact nip roll, a method for assembling an improved contact nip roll, a system for nipping a web, and a method for nipping a web are provided. The improved contact nip roll integrates an inner softer core that can provide compliancy to web caliper variations, while rigid annular rings and a harder outer skin can maintain a uniform contact area.

Description

Background technique [0001] Conventional web processing typically uses nip rolls in, for example, length orienters to separate parts of the web production line under different tensions, where the web is accelerated after the nip. As the web travels through the length orientation equipment, the web stretching process will produce web thickness variations not only in the width of the web but also in the longitudinal direction of the web. Usually either a soft nip roll or a hard nip roll is used to control the thickness variation. The nip surface can change the width of the contact area along the roll surface. The changes can change the relative movement between the two rollers, causing web wear. In a similar manner, harder roll surfaces can only produce higher nip pressures at defects and / or thicker web thickness locations, and can cause significantly different web stresses. This web stress can propagate through the web path, resulting in web troughing, web wrinkles, and ultima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H27/00F16C13/00B65H20/02
CPCB65H2404/1316B65H2404/135B65H2404/1321F16C13/00B65H27/00B65H20/02
Inventor 凯文・B・纽豪斯布鲁斯・E・泰特沃尔多・L・洛佩斯
Owner 3M INNOVATIVE PROPERTIES CO
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