TECHNICAL SPECIFICATION

• 1 No : 300 mm dia main drum duly hard chrome plated & grinded
• 1 No. Metering roller duly hard chrome plated & grinded
• The above 2 rollers shall be made out of steel pipes having sufficient wall thickness . 

A sliding arrangement with a coating tray & width adjusting stopper , with 3 Nos. Aluminium rollers . All the above assemblies shall be mounted on the proper frame structure along with the base 

Drying Tunnel 

• Drying Tunnel : 50 Ft Length
• Drying Tunnel made out of M.S. Fabricated.
• The 50 Ft length tunnel divided in 5 parts of 10 Ft each.
• Tunnel have sufficient no. of 3 Inch Dia Aluminum Rollers
• Web aligner 3 Nos. 3 X 0.5 HP = 1.5 HP Load 

UNWIND WITH WEB GUIDE AND TENSION CONTROL

REWIND WITH AC VERIABLE DRIVE

HEATING SYSTEM

ELECTRICAL / HOT AIR

ACCUWEB has developed special type D.G. Lacquer Coating for getting optimum quality of lacquer coating evenness and with sophisticated control and tension control system to get quality of coating of high speed to get maximum production.

TECHNICAL SPECIFICATIONS:

• Web width: 800 - 2400mm

• Unwind / rewind dia.: 800 - 1200 mm

• Machine speed: 150 / 200 M/ min

• Heat source: Hot air generator / Thermic fluid / Radiator & blower

• Exhaust: 7.5 HP (Individual for each zone / programmable optional)

• Chilling roll: 150 dia.

• Tension control: For unwind & synchronized drive for coater, nip & positive drive

• Materials to be coated: Polyester, BOPP, PVC, foil

OPTIONAL:

• Air shaft

• In-feed drive

• Ink circulation with viscosity control

• Programmable exhaust with PID

• Ultrasonic web guide

Unwinding station provided with digital A.C. Motor to controlled tension and load cell feed back for auto tension with necessary path provided for easy access of the web.

Technical data for double side lamination and gravure coat head (1100mm working width)

• Working width: 1100mm
• 1st unwinder for polyester with webguide, load cell, auto tension control and pneumatic brake.
• Unwind dia for uniwinder : 1000mm.
• Corona treater for both side or single side (length 1200mm) speed upto 30mt/min.
• Nip roller with 3h.p drive
• Dip coating with tray adjustable (up & down)
• Scrapper roller assembly 2 no.
• Drying chamber 24 feet (6 feet each x 4 = 24 feet total length of chamber with oil heating radiator blower and exhaust).
• 2nd unwinder for paper with load cell auto tension control and pneumatic brake.
• 3rd unwind for paper with load cell auto tension control and pneumatic brake.
• Chilling laminating unit with pneumatic rubber roll pressure.
• Pneumatically operated lay on roll for finish rewind.

Detailed automisation

• 4no. Air shaft (1st polyester unwind, 2nd paper uniwind, 3rd paper unwind, 4th finish roll rewind)
• Load cell auto tension control (1st polyester unwind, 2nd paper uniwind, 3rd paper unwind, 4th finish roll rewind)
• Pneumatic brake (1st polyester unwind, 2nd paper uniwind, 3rd paper unwind, 4th finish roll rewind)
• Nip roll assembly cum gravure coating with 3hp drive and sync gear.
• Laminating chilling unit with 5hp drive and sync gear.
• Rewinding unit with 7.5hp drive with sync gear.

Control panel

• Control panel for 3 drive and all load cell tension control.
• Remote station at unwind and rewind for easy operation.
• Control panel for all pneumatics.

Wet Lamination

• With wet laminations, the adhesive is applied to one substrate, usually by roller coating or air knife. The coated substrate is then nipped with another substrate, and the resulting laminate may then be left to air dry or passed through a heated oven to remove solvent and build bond strength. The types of adhesive used for wet lamination are:
• waterborne natural products, such as starch and dextrin or waterborne synthetic latex products, such as polyvinyl acetate, acrylic, etc.
• 100% reactive liquids, such as polyurethanes or polyesters.
• Wet lamination via waterborne or solvent based adhesives is confined to applications where at least one substrate is porous (e.g., paper, cardboard, textiles) to facilitate drying. Once cured, bond strength is generally high enough to cause failure or tearing of the porous substrate. Most often, waterborne synthetic latex adhesives are utilized for wet bonding because of their high initial strength and fast drying characteristics when applied to porous substrates.

Dry Lamination

• Dry laminations are those in which the liquid adhesive is first dried before lamination. The adhesive can be either applied to one substrate and dried or it can be applied as a hot melt type of film (essentially another film layer). The adhesive is then in the dry solid or slightly tacky stage when joined with the other substrate. The bonding is generally achieved during a high temperature, high pressure nip. The temperature and pressure are sufficient to cause the adhesive to flow and create an instantaneous bond when it cools and gels. Dry lamination can be applied to a broader range of products such as film-to-film and film-to-foil.
• Dry laminating adhesives are generally solvent based although considerable development has taken place to reduce or replace the solvent to meet environmental regulations. This has produced several strong competitors to conventional solvent-based adhesives such as: hot melts (e.g., ethylene vinyl acetate copolymers), 100% reactive solids (e.g., two-part polyurethanes, one part moisture curing polyurethanes and UV/EB curable acrylates), high solids solvent based (e.g., silicone), and waterborne adhesives (e.g., acrylic emulsions).
• A significant advantage of reactive 100% solids adhesive in addition to the reduction in possible VOCs is the possible elimination of drying ovens and resulting energy cost.

SALIENT FEATURES:-

• Heavy duty C.I. Cast iron & Heavy fabricated structure
• Gravure type coating system
• Liner type impression pressure assembly actuated with pneumatic piston for rubber roll Doctor blade and Nip Roller
• Fully insulated imported special glass wool sheet fitted in the panel (Top side & Bottom) For controlling heat loss
• One & One Slit type counter air flow arrangement, Divided equally are placed against roller for proper web support
• Exhaust are distributed through-out the length of drying chamber & individual exhaust duct for each zone
• Digital temperature controller with indicator & PT 100 sensor for each Zone
• Inside heating for Nip Steel roller
• Heavy duty Shaft types fix Rewinder with motor

REWIND STATION:

• A. C. synchronize Drive with Load cell
• Center winding system / Surface

HOT AIR GENERATOR:

• Diesel / Fired Air Heater
• Thermic fluid Heater with Blower

COATING UNIT:

• Independent A.C. Drive
• Pre  Heating / Exhaust

UNWIND STATION:

• Tension control Brake Unit with load cell feedback (Pneumatic/Motorized)
• Moveable unwind with web guide