HEVEA
ENGINEERS (P
) Ltd
www.heveaengineers.com
Welcomes You
German Perfection, Indian Prices
World’s First Cyberoller shop:
HEVEA
ENGINEERS (P
) Ltd
Faster => Delivery
Higher => Resilience
Stronger => Formula for long life
German Perfection, Indian Prices
HEVEA ENGINEERS PVT LTD
MANUFATURERS OF PRINTING
RUBBER ROLLERS IN TECHNICAL
CO-OPERATION WITH
GUMMIWERK KRAIBURG, GERMANY
WHY PRINTING ROLLERS ARE CRITICAL TO PRINTING QUALITY
Printing quality depends on:
• the quality of paper
• the quality of ink
• the quality of rubber rollers
TYPES OF ROLLERS FOR PRINTING
• Letter Press
• Offset Inking
• Offset Damping
• Lamination
• Flexo
• Gravure
• Metal Print
• Food Grade
OFFSET PRINTING ROLLERS
Conventional Dampening Rollers
Alcohol Dampening Rollers
Offset Printing Rollers classified into
Ink Form Rollers Ink Distributor RollersDampening Rollers
Sheet fed Offset rubber rollers
• Damping – Conventional – Bareback with fount– Bareback alcohol
Duct
Forme
•Inking – Forme - Distributor
IMPORTANT PROPERTIES
• Hardness - from 25 to 100
• Resilience- To spring back to its original shape after being subjected to pressure
• Evenness - To maintain an even supply of ink
• Chemical Resistance- Resistant to ink, fountain solutions, and cleaning agents.
• Dimensional stability-Roller needs to remain in proper shape and size even after use
RESILIENCE- critical for inking roller
Resilience is elasticity or spring effectHigher resilience means lower pressure setting
Lower pressure setting means
•Less friction and wear out of plate•Less heat generated and longer life for roller
Damping rollers required properties
Must be inert in aqueous media
Must have high affinity for water
- Low surface tension for rubber compound
Bareback damping forme roller perfectly even
Alcohol damping – high resistance to alcohol
ROLLER CARE
• 1. Have Spare set to avoid downtime of your expensive machines.
• 2. Store the rollers in a cool place
• 3. Keep Rollers in a storage rack or the packing box
• 4. Handle Carefully- Avoid contact with sharp edges
• 5. Ensure bearings are in good condition
• 6. Cleaning the roller
CLEANING THE ROLLER
• Ink should not be allowed to dry on the roller
• When machine stops clean roller with a two step wash.
• Clean roller should have a dull velvet finish of a new roller.
Slash Overall Cost
Slash your Overall cost using our rollers
Our Proud Customers
The Hindu Lokvani Hallmark
Thomson Proteck
Time of India Shakthi Udyog
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TROUBLE SHOOTING OFFSET ROLLER PROBLEMS
PROBLEMS CAUSE SOLUTION
DUE TO ROLLERS OTHER THAN ROLLERS
SCUMMINGDIRTY OR GREASY DAMPENING ROLLER IMPROPER INK WATER
BALANCE WASH THE ROLLERS THOROUGHLY.IF WORN REGRIND OR REPLACE DEFECTIVE ROLLERSPLATE SURFACE
SCRATCHED
SMALL HARD PARTICLES EMBEDDED IN THE ROLLER
FOREIGN MATTER ON BLANKET OR IN INK
HORIZONTAL STREAK GLAZED INKING FORME ROLLERSFORME ROLLER SET TOO TIGHTLY AGAINST PLATE
RESET IFR TO PROPER PRESSURE AGAINST PLATE
SCUM STREAKS ACROSS PLATE
GLAZED INKING FORME ROLLERSDAMPENING ROLLERS SET TOO TIGHTLY AGAINST THE PLATE
RESET AT PROPER PRESSURE
UNEVEN STRIP DURING STRIP TEST
ROLLERS UNEVEN ACROSS DIA GRIND OR REPLACE
INK FLOW IN FINE DROPLETS OR FILAMENTS
ROLLERS IN POOR CONDITION INCORRECTLY SET ROLLERSRESET CORRECTLY OR REPLACE
INK FEEDS IN PATCHES
GLAZED ROLLERS,LOW SPOTS, BENTSPINDLE
TOO MUCH DAMPING SOLUTION OR GUM BLANKET CONTAMINATED PAPER
REMOVE THE GLAZE WITH A STEP WASH UP SOLUTION
GHOSTING GLAZED OR HARD ROLLERS POOR INK AFFINITY CHECK, REGRIND OR REPLACE IF HARDNESS IS ABOVE 40
NON UNIFORM PRINTING ROLLERS IN POOR CONDITION IMPROPERLY SET IFRCHECK THE CONDITION AND RESET IFR
INK REPELLING SPECKS OR DOTS
FOREIGN PARTICLE PRESENT IN THE PITTED ROLLER
PRESENCE OF PAPER FIBRE, FOREIGN MATTER ON THE PLATE
RECONDITION ROLLER CLEAN THE PLATES
HEVEA
ENGINEERS (P
) Ltd
Faster => Delivery
Higher => Resilience
Stronger => Formula for long life
German Perfection, Indian Prices
It is soft and prone to damage
Nice to feel but will crack easily
Have to maintain it properly…
Printing Roller is like your wife