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">
 * HOME
 * COMPANY
   * Vitreous – Wooden Laminates
   * IberoWIN Bar System
   * Hi Tech Blanket Conversion
   * Barred blanket production
     * IberoWIN Blanket Conversion Manual
 * WORLD PRODUCTION
 * LIBRARY
   * Test Procedures
   * Results Presentation
   * Brand Test Data
   * Brand Comparison
 * NEWS
   * Happy – Unhappy Balls
   * Blanket’s Reaction at the Nip
 * CONTACTS
   * Request quotation
   * Send message
   * Contacts Us
 * 

Menu
iberografica@printersblankets.com
00351 219245670




HOME



IberográficaPrinters Blankets
 * HOME
 * COMPANY
   * Vitreous – Wooden Laminates
   * IberoWIN Bar System
   * Hi Tech Blanket Conversion
   * Barred blanket production
     * IberoWIN Blanket Conversion Manual
 * WORLD PRODUCTION
 * LIBRARY
   * Test Procedures
   * Results Presentation
   * Brand Test Data
   * Brand Comparison
 * NEWS
   * Happy – Unhappy Balls
   * Blanket’s Reaction at the Nip
 * CONTACTS
   * Request quotation
   * Send message
   * Contacts Us


   
 * For printers who value quality service
   LONG-TERM PARTNERSHIP
   We value highly the number of successful partnerships built-up with important
   web and sheet-fed printers
   Our company
   our library
   
   
 * To succeed with difficult jobs and reprints
   UNEVENTFUL JOBS
   We are in this market for over 35 years (since 1988)
   The technical means and know-how required to guarantee success can be
   translated into a few simple rules
   Contact Us Now
   
   
 * Whenever trouble-free printing is the target
   DEPENDABLE BLANKETS
   Famous printers chose to depend on first class blankets
   to successfully replace the make-ready uncertainty by uneventful difficult
   second runs
   Check World Production






CLICK HERE TO DISCOVER MOST WORLD PRODUCTION REFERENCES






WEB AND SHEET FED


WE SPECIALISE ON BLANKET CONVERSION



Come to know IberoWIN – An interactive software Blanket Conversion Manual that
meets both the individual press unit details and printer conditions and delivery
preferences, with online step-by-step quality control.

Comprehensive encoding of blanket material, including sub-products and
manufacturing process details, enabled to build an extensive database making it
possible to achieve a truly professional standard in blanket format conversion.


discover more




COMPOSITES, LAYERS AND COMPONENTS


STUDYING BLANKETS, RUBBER & COTTON SINCE 1988


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TEST PROCEDURES

RESULTS PRESENTATION

BRAND TEST DATA

BRAND COMPARISON

WE PROVIDE QUALITY


LABORATORY OBSERVATION

At the beginning all blankets look alike!
However, only after noting the differences real blanket study starts, relating
design to performance.


More Info




JUST GIVE US A CALL


DEPENDABLE QUALITY SERVICE

Your business is too important to rely on any company.



We convert printers blankets rolls into formats for web and sheetfed offset
presses.
We make qualification tests of every new blanket model from our suppliers at the
in-house laboratory.

Handy blanket thickness readings taken at production, are made within 0,005 mm
accuracy.
Shore A test affords just a general blanket hardness indication while the
µ-hardness test gives a more approximate indication of the blanket press
behaviour.
Bar fitting quality onto the blanket is checked with the bar pull strength test.

New blanket models are also analysed under microscope magnification as part of
their characteristics evaluation.
Comparative blanket surface analysis allows a rough guess as to their printing
quality and press life.
Blanket cross section observation shows in detail blanket structure layers and
possible premature blanket thickness loss or heating in service.

Blanket conversion equipment features and manufacturing specifications are also
developed, duly completed by the respective user manuals.

Material evaluation, production and after sales reports are carefully archived
building an invaluable data base for the challenges ahead.





TESTIMONIALS

Iberografica‘s sharp knowledge supported our production into achieving a new
efficiency stage. Thank you!

MR. MANUEL TAVARES

Head of Production - Sogapal

I wish other problems were also solved with a programmed annual order.

ENG. ANTÓNIO DA COSTA

General Director - Unipress

It is amazing how more than a decade has elapsed since your blankets were
qualified with us.

DR. HERNÂNI ALMEIDA

Administrator - Funchalense

Iberografica‘s sharp knowledge supported our production into achieving a new
efficiency stage. Thank you!

MR. MANUEL TAVARES

Head of Production - Sogapal

I wish other problems were also solved with a programmed annual order.

ENG. ANTÓNIO DA COSTA

General Director - Unipress

Feed Response Graphs & Tensile Test




CHAT VIA WHATSAPP

Get a new insight to current ideas
Get acquainted with new concepts
Contact now

More info


REQUEST A QUOTATION

Insist on professional blankets.
Get acquainted with surprise-free second runs.

More info


SEND A MESSAGE

Share with us your doubts and unsolved printing issues.
Take advantage of our blanket expertise.

More info



BLANKET TECHNOLOGY

Regardless of the undeniable progress of the blanket industry, some aspects of
blanket response have stubbornly remained unpredictable, specially when it comes
to controlling rubber rebound and blanket feed properties.
It is widely acknowledged how recurrent design attempts to overcome blanket
response unpredictability have had its intended goal not confirmed by field
results.

The persistent study and research carried in our laboratory, required to satisfy
our standards of Blanket Conversion, Commercial Advise and After Sales Service,
was rewarded at last:
A significant segment of blankets response has an oscillatory nature.
Due to the very peculiar rubber characteristics, blankets have an innate and
most disturbing aptitude to respond resonantly to a wide range of oscillatory
stimuli frequencies.
Those stimuli are typically external, such as press vibration and the cyclic
bump preceding every new copy and may generate a resonant reaction in one or
more of the blanket layers…
Go to News to keep on reading.
For further details please contact forum@printersblankets.com.


IN OUR NEWS



COMPRESSION & HYSTERESIS

SEE ALL NEWS HERE



WHIP REACTION & FEED PROPERTIES

SEE ALL NEWS HERE



ELONGATION & TENSILE

SEE ALL NEWS HERE



ENVIRONMENT, STRUCTURE & BEHAVIOUR

SEE ALL NEWS HERE



HARDNESS

SEE ALL NEWS HERE



OUR COMPANY

Our company convert printers blankets rolls into formats as used by web and
sheet-fed offset presses around the world.
It took almost ten years to buildup the required set of work stations to convert
blankets in a professional way.
We can assist in relating print response to blanket design and the use of
adequate raw materials.

OUR CONTACTS

iberografica@printersblankets.com+351 219245670 | +351 219243731Centro Emp.
Sintra-Estoril VI-Fr. P
Impasse Fernão Lopes, 11 Capa Rota
2710-264 Sintra - Portugal

FOLLOW OUR NEWS


© 2023 Iberográfica | All rights reserved | Powered by WEBES - Web Engineering
Solutions

SPRING VERSUS DASHPOT

Spring versus Dashpot: So apparently similar Balls with so completely different
reactions.



The Happy Ball jumps several times, as it would be normally expected from
elastic rubber.

The Unhappy Ball reaches the floor with an even slightly higher Kinetic Energy.

Even so, it does not gather enough free Potential Energy to jump and initiate an
oscillatory movement.

CLOSE

INLINE THICKNESS CONTROL

Inline Thickness Control contributes to a new standard of Printing Blankets
Conversion.



Dead-weight Thickness Measurement Equipment is an integral part of the blanket
format Identification Station, for in-line thickness tolerance checking.

CLOSE

CONSTRUCTIVE – DESTRUCTIVE INTERFERENCE

Constructive – Destructive Interference: The resultant of two oscillatory
movements is the vectorial addition of the two oscillations.

Let us assume graph 1 is the Applied Oscillation and graph 2 is the Reaction
Oscillation. Graph 3 is the resultant.


The above figures – left and right – show two extreme cases when the
oscillations are in step (phase) or in counter-phase.

The phase angle between Applied and Reaction Oscillations results from the
Response Delay Time and Response Frequency.

In fig.1 the Resultant Amplitude is larger than the Applied Oscillation, while
in Fig.2 it opposes the Applied Oscillation.

If Applied and Reaction Oscillation Frequencies are different Resultant Curve is
distorted (no longer sinusoidal).

CLOSE

SYSTEM DAMPING DEGREES

System Damping Degrees: Conditions the number of cycles that an oscillatory
system, not connected to an oscillation source, is able to complete.



Curve 3 shows the reaction of a lightly damped oscillatory system to an
excitation pulse. It will complete a few oscillation cycles through its
equilibrium point before it comes to rest.

Curve 2 describes an oscillatory system that, once excited, returns to its
resting position as quickly as possible, without completing any oscillation
cycle, typical of a critically damped system.

Curve 1 depicts the behaviour of a heavily damped oscillatory system. Once
excited it returns to its resting position more slowly than a critically damped
system. A higher damping degree will mean an increasingly slower return to rest.

CLOSE

STRING – NATURAL FREQUENCY

String – Natural Frequency: Unlike Springs that oscillate axially, Strings’
vibration is transverse to its length.
Selected Fret – #4 in picture – determines effective string length and
respective response frequency.
In a String, material, geometrical proportions and tension determine its
Response Frequency.



In a fabric ply, fill threads will eventually be “active”, acting as frets
whenever energetic Warp Thread prestress is present.
When two adjacent fill threads become “active”, they define extremely high
pitched warp thread string-segments.


CLOSE

GROOVED HORN TIP

Grooved Horn Tip: Pressure concentrates at Horn Crests.



Even a low energy transfer is enough to efficiently melt continuous glue lines.

CLOSE

SPECIFIC END-USE HORNS

Specific End-Use Horns: Horn design varies, not only with its End-Use, but also
with its Service Frequency.
Speed of propagation equals the Frequency times the Wavelength.
Speed varies with the propagation media.



Half Wavelength Horns
Top – 30 kHz Cutting Horn
Bottom – 40 kHz Welding Horn

CLOSE

HARD METAL BLADE TIP

Hard Metal Blade tip affords a perfect cut with virtually no wear.



When Ultrasound fed, high cutting speeds become possible with negligible Blanket
reaction.
It is easy to obtain vibration amplitudes well in excess of 0.1 mm.

CLOSE

ULTRASOUND CUTTING TOOL

Ultrasound Cutting Tool reduces Format distortion, significantly contributing to
professional Blanket Conversion.



Horn fitted with Hard Metal Blade Tip

CLOSE

VORTEX WORKING PRINCIPLE

Vortex Working Principle – Compressed Air Source unfolds into a Glacial Cold Air
output plus a Hot Air residue.
Intense and spot ultrasound horn tip cooling together with full “cold operation”
efficiency. That’s Vortex magics.



Stationary Vortex Hi-Speed Engine with Hot and Glacial Cold Air Outlets

CLOSE

QUALITY FACTOR Q OF AN OSCILLATORY SYSTEM

Quality Factor Q – The Ratio between the peak of reactive energy stored by the
system and the energy dissipated during each cycle of oscillation defines Q.
With the oscillatory source disconnected, in a low Q factor System, oscillation
amplitude will dampen and die out rapidly.



Too high a load for the available Oscillatory Power or geometrical changes will
lower System Q factor.

CLOSE

HORN SHAPE VARIETY

Horn shape variety enables to apply the ideal unit according to its end use
application and particular load geometry.



As the name suggests, Horn design includes often an amplification factor,
increasing vibration amplitude delivered to the load.
Ultrasound applications range from industrial welding and cutting, or cleaning,
to medical and nano technology.

CLOSE

ULTRASOUND BOOSTERS

Ultrasound Boosters, as the name suggests, act like Resonance Boxes. They
decisively contribute to improve the Quality Factor, Q, of the oscillatory
system.



The left and right sides are not symmetric. When the Converter connects to the
left side, the output vibration amplitude doubles.

CLOSE

BLANKET METAL TERMINALS



Blanket Metal Terminals, usually known as Bars, enable swift blanket cylinder
dressing on offset presses.

CLOSE

TAPE APPLICATION CPANEL

Tape application CPanel enables control and optimisation on glue tape fitting
operation.



Control Panel enables prompt management of 11 glue operation parameters, of
which we highlight:

Blank and Glue Tape Models, Energy transferred and Pressure applied and gluing
speed.

Other variables are digitally programmable directly on the data base.

CLOSE

ABRUPT FRONTIER

Abrupt Frontier – Depending on the particular instance, Blanket Format edges
represent solid/gas, or solid/liquid frontiers.



Ambient Moisture during Blanket storage and use, Ink and blanket Washes subject
blanket surfaces and edges to degradation.

CLOSE

ULTRASOUND CONVERTERS

Ultrasound Converters result from a stack of special ceramic disks, using the
Piezoelectric effect.



In a somewhat similar way to a resonant helical spring, the Converter disk stack
is subject to axial length variations.
However, ceramic Converter’s resonance takes place at ultrasound high frequency
with extremely
minute amplitude.
Except for the reaction delay, its response is in step with the electric
oscillator’s frequency.

CLOSE

ULTRASOUND GENERATOR


An Ultrasound Generator converts the mains 50-60 Hz alternating current into a
Source of
High Frequency Power. It assists Barred Blanket production.
Usual Frequencies fall within the 20 to 40 kHz range.

CLOSE

ULTRASOUND WELDING PRINCIPLE

Ultrasound Welding Principle comprises several components:



Ultrasonic Power Supply Generator, Converter, Horn and Load.
The Booster (also shown in the arrangement), usually included to improve
resonant system’s efficiency.

CLOSE

GLUE ACTIVATION CONTROL-PANEL

Glue Activation Control-Panel has a generous number of different glue activation
cycles capability.
Bar geometry and end use conditions set heat cycle temperature and time.



Glue-Activation-Press Control Panel enables the use of the best heat cycle and
duration.
It does also register total and still missing number of activation cycles for
Quality Assurance purposes.

CLOSE

PRETENSIONING IMPLIES DISTORTION

Pretensioning implies Distortion – They are just Cause and Consequence, inherent
to blanket’s carcass fabrics concept behind its production.



Distortions in the Around and Across directions will necessarily be different.
It is possible to minimize internal tension effects, generated by the warp
thread length equalization operation taking place during cloth manufacture
stage.

CLOSE

BAR PRESS CONTROL PANEL

Bar Press Control Panel has up to 100 different press cycles capacity.
Each register enables to program a wide range of press parameters, to meet
specific Bar requirements.



Steel Bar Model description includes sheet gauge and nominal closing thickness.
The image refers to a 0,5 x 12 x 12 mm stainless steel bar designed to close
with 2,25 mm.

CLOSE

PERSONALISATION – CUSTOM  EXECUTIONS

Personalisation – Custom executions – Each customer has its particular needs.



Base Execution defines best Raw Material origin and the Cutting Method.
It does also include Product Identification and Blanket dressing Procedure,
format Corner Trimming and correct Bar details.
Personalisation affects up to 14 Conversion Operations adding another 18 new
Parameters and 8 Custom Instructions to meet particular requirements.

CLOSE

BLANKET CUTTING CONTROL PANEL

Blanket Cutting Control Panel coordinates the seamless performance of four
independent axes and an enlarged parameter set for confined blanket material
cutting.



Picture shows Cutting Table Control Panel in its Manual Mode Menu.
Semi-automatic mode has an up-to 8 stage sequential cutting capability from
customer’s built-in Data Base.

CLOSE

SEMIAUTOMATIC CUTTING TABLE

Semiautomatic Cutting Table assisted by Ultrasound equipment.



Two Independent Processors digitally control Cutting Head Travel and the
respective Depth.
Laser precision equipment warrants Parallelism from the movable stop to the
cutting track.

CLOSE

BLANKET CROSS-SECTION AND SURFACE

Blanket Cross-Section and Surface Texture give an initial assessment of its
response consistency.



Series 710/1,70 mm Blanket Cross-Section Structure and Surface Texture.
Please note the rectified free surface of the Compressible Layer’s Sub-Assembly.

CLOSE

BLANKETS PACKAGE – NARROW-GAP-WEB

Blankets Package – Narrow-Gap-Web – provides additional moisture protection. It
does also reduce handling to the bare minimum until cylinder dressing.



According to PCKOUT instruction, surface rubber faces outwards with bar edges
protected by foam tape.
A plastic sleeve, duly sealed at both ends, covers each format.
Hard cardboard boxes protect each set of 4 formats, individually protected by
internal cardboard separators.

CLOSE

WEB BLANKETS PACKAGE

Web Blankets Package: Follows strict procedures for ease of press cylinder
dressing.



For WEB applications rubber surface faces outwards, duly protected by paper.
Whenever the bars have sharp edges, these must be protected by
plastic foam tape.

CLOSE

×

HAND TOOL INSULATION TUBES

Hand Tool Insulation Tubes incorporated in mass produced Electric Power Tools.



Constant quality filament wound double insulation tubes used in Black & Decker
Hand Tools for added operator protection.

Local Owens Corning factory used this feature to optimise the silane grade for
epoxy resins added during Fibreglass extrusion.

Effective Silane use transfers the mechanical stresses applied to the laminate
bulk to its fibreglass reinforcement.



CLOSE

DENSIFIED WOODEN LAMINATE

Densified Wooden Laminate obtained following compression, with a heating/cooling
cycle.
Monitoring veneer moisture is crucial during the complete production cycle.



Magnified view of unidirectional goiabão laminate, 37-layer sample with 2 cm
thickness.
Laminate developed for shuttle driving arms of textile weaving looms.



CLOSE

STATOR DMC INSULATION CAPS

Stator DMC Insulation Caps – Dough Moulding Compound Technology applied into a
hot press mould.



DMC (Dough Moulding Compound) – Insulation caps form a clearly visible orange
circle on generator’s stator.
They represent just a small portion of the ~10 Tons insulating laminates
supplied to every BBC and Siemens generator.



CLOSE

SALT WATER INJECTION PIPE

Salt Water Injection Pipe with Filament Winding technology used in oil fields to
achieve the required high pressure.



Section of FRP Filament wound pipe including connecting Spigot with O-ring Seal
groove, Connection Sleeve and stainless steel cable Lock.
Pipe specially developed for Petrobras.

CLOSE
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