porovision control systems at fast running webs or fabrics

Optical control systems at fast running webs or fabrics

Online porosity/permeability control
Porosity control of porous and/or perforated web material, with laser
or electrostatic perforation systems, which are produced in speed
ranges up to 600 m/min and web widths up to 2000 mm are difficult to
control with pneumatic systems because that methods includes
disadvantages such as web tangency, web toughing, material flaking,
folds build-up, dust and dirt flowing in the system.

These difficulties are ideally solved with stationary/scanning optical
porosity control systems as OPSS-1, OPSS-1-A/B, OPRL-1-A/B which are
patent pending by DE 10251610.

Air permeability or porosity ranges from 50 up to 5,000 C.U. (ml/sqcm/
min) respectively 3 to 100 l/sqm/sec. Franksystem by web widths from
100 to 2000 mm at speeds of up to 500 m/min are now possible.

Working principle
The online quality control technique is performed to detect/scan
zones, measurement areas or lines in using multiple colour sensors and
a precise tiny line laser which are linked to sensor internal
controller units. It controls roll or bobbin formats as stand-along or
mechanical coupled devices on existent scanning units which measure
material weight, thickness, formation, smoothness, roughness, opacity,
etc. in web widths up to 6000 mm.

For lasers or electrostatic perforation in bobbins and wide paper webs
online measuring procedure and their devices are indicated, with which
same transverse movement and simultaneously collections of perforation
positions, perforation profile quality and porosities with two
different sensor systems and locations. Zone/line position detection/
accuracy by 0.1 mm with a laser line unit, scanning speeds up to 300
mm/s, Infineon DSP controller firmware, high-speed serial link up to
230.400 bit/s, industry PC performance, C++ process/visualisation
software for production quantity, quality, statistics, LAN to quality
control centre, etc.

With transverse movements of both measuring systems across the web
width, consisting of line laser to detect the quality and position of
single holes, groups of holes or determined perforation zones and in
the same time as the light transmission sensor unit monitors the
porosity profiles and determined their integrals continuously.

Thus direct feedbacks to the perforation or machine system enable the
trend compensation of arising changes that production rolls without
intermediate stops are high quality and quantity controllable.

Applications
Jumbo roll-by roll production for offline micro laser or electro
static perforation machines for web widths from 100 mm up to 2000 mm,
porosity ranges from 80 C.U. up to 5,000 C.U. with feed backs to each
perforation channel and automatic production control. The OPSS-1
system enables a production networking for laser or electrostatic
perforation machines in quality and quantity aspects in order of ISO
certifications.

As well for porous, filter, permeable paper, packaging, sack, fabrics
or other webs at making, finishing, refining or other industry
machines or processes.

Micro Perforation
Material webs such as cigarette, tipping, filter, coated, bag or
packing paper, bonded fabrics, spun bonded non-woven, technical
textiles, fabrics, laminate, etc. with base weights from 20 g/m2 to up
to 150 g/m2, up to 20 g/m2 LPDE coating films, are perforated electro
statically - ESP - nano/micro or laser or mechanical micro or macro
for different application purposes. For the human eye invisible
electrostatic - ESP - nano or micro perforations may be arranged in
areas as well as in zones with specific distances within its web. The
sizes of the holes range from 1 to 120 µm in diameter and hole
sequences from 1.5 to 16 million pores per second.

Arrangements of zones are usually carried out in width from 2 to 6 mm
and pore density of 15 to 250 pores per cm2 whereas the perforation of
areas results in pore densities of up to 2 million pores per m2. ESP
perforations allow for porosity levels from 80 to 2500 C. U., by webs
from 100 to 2000 mm at web speeds of up to 500 m/min, depending on
porosity and material consistency in relation to its ability to
perforate.

Laser perforation
Perforate by pulsed or enlarged focused laser beams holes sizes from
60 to 200 µm, typical hole densities from 10 to 30 holes per cm, holes
sequences from 100.000 to 500.000 per second at a maximal 16
perforation heads distributed over the width are possible with
traditional laser systems/machine. Their porosity levels are from 100
to 3000 C. U., normally with web widths up to 500 mm and web speeds of
up to 600 m/min.

IPM - International Perforation Management - owns development of laser
perforation technology LPM-1, patent grant by DE 102004001327,
operates with quadruple beam inputs up to 8 KW into a high power CO2
laser beam multiplexer to generate up to 200 individual laser
perforation rows across the web, combines automatic positioned laser
perforation heads, focus setting, web speeds up to 400 m/min, web
widths up to 2000 mm, up to 3,000.000 holes per second, jumbo roll-by-
roll production, optical online permeability/perforation line
positioning control, porosity feedback, high automation grad and other
features. Each laser perforation lines are archive able from 100 up to
1000 C.U.

New ranges of applications will be made accessible as new products
with special features will be developed.

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IPM - International Perforation Management
High-tech engineering - China - Germany - Thailand
http://www.microperforation.com
http://www.microperforation.com.cn
http://www.deguodaguan.com/ipm/
http://www.dk3qv.de

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http://www.microperforation.com/mll-1-laser-perforation.html
http://www.microperforation.com/lpm-1.html
http://www.microperforation.com/opss-1-optical-online-porosity.html
http://www.microperforation.com/igbt-esp-unit.html
http://www.microperforation.com/online-perforation-cigarette.html

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