Chinese Brand Popular Paper Coating Machine for Thermal Paper

• Type: Air Doctor Coater
• Driven Type: Electric
• Automatic Grade: Automatic
• Packaging Material: Wood
• Packaging Type: Cans
• Application: Paper Coating Machine
• Model NO.: JRX
• Transport Package: Wooden Case
• Specification: customerized
• Trademark: JRX
• Origin: China

Product Description

1. The main technical parameter

Paper types	thermal paper
Base weight	40-100 g/m²
Operating Speed	80-110 m / min
Designed speed	120 m / min (50Hz)
Coating type	double blade knife coaters, three-roller type back coater
Compressed air pressure	0.6-0.7 Mpa
Saturated steam pressure	0.6-0.8 Mpa
Coating weight	2-20 g/m² for per coater
Drying type	hot air blowing, one side
Finishing type	hot cylinders and calendering
Maximum dimensions	length 27500mm, width 5300mm, height 4140mm

2. Main structure




2.1 The unwinding device

Unwinding stand is of uniaxial type, with tension control device and magnetic brakes(or motor brake).
Pneumatic core shaft: Φ74x1400mm, 2 sets
Rack is equipped with adjustable frame, the position of the base paper can be adjusted in coating machine. The new paper reel can be prepared on the rack when machine running.
2.2 Blade knife coater, 2sets

1. Color feeding roller
Diameter / roller width: Φ270x1400 seamless steel pipe, chrome-plated, roller bearings SN208
Chrome thickness: 0.1mm
Quality assurance: the roller surface roughness: Ra0.05
 Roller surface runout: ≤0.01mm
 Roller surface without wear marks, punch point, thread marks
 Feeding roll with separate AC variable frequency drive motor, according to process requirement, the feeding roll speed can be adjusted. 
2. Backing roller
Diameter / roll width: Ф450x1400, steel rolling, roller bearing SN515
Covering Material:High-quality neoprene synthetic rubber
 Rubber Hardness :Shore 78 º ± 2
Cladding thickness: 18mm
Roller surface runout: ≤0.02mm
3. Paint tray
Paint tray made of 1.5mm thick stainless steel SS304, divided into the feed chamber, overflow chamber and backflow chamber, inlet port at the bottom of the trough, in order to promote the liquidity of paint. In the trough it should avoid stagnant dead zones to prevent coating caking; back flow is about 80% of total flow, feed roll manually lifted, with flexible lifting and falling.
4. Coating metering unit
  The range of Blade angle adjustment:0 ° -30 °
  Arm moving:pneumatic cylinders
Scraper beam is steel plate welded structure. Rotating bearing is plain bearings.
Banner coating weight single-point adjustment device is accurate screw thread device. The adjustment spacing of banner coating weight is 50mm.
5. Compressed air control systems, 2 sets
  Equipped with air source treatment components and control components for coater to act:
  Feeding roller moving
  Coating tray moving
  Scraper blade clamping
Fine tune is between feeding roller and backing roller, to control the clearance between the two rollers. 
6. Machine frame: welded by steel plate and profile steel,thought aging treatment.
2.3 Hot air drying system

The system consists of single-sided hot air oven, draught fan, heat exchanger or the gas burner, ventilation door, and air duct.
1. Hot air oven, 3 sets
Single-sided hot air dryer, of unit form, made of welded profile steel, inner and out surface coated by 1mm steel plate, in the middle it is 50mm thick insulation materials to ensure the inner temperature and ambient air temperature does not exceed 20ºC. Air duct made of 1mm galvanized steel plate. Spray nozzle is made of 1.2mm thick profile aluminum alloy with uniform gap. Spray slit width 2.5-3mm.
Guide rollers in ovens:  Φ100×1400,12 sets in total, roller body of aluminium, roller bearings P205.
2. Hot air system, 3 sets
Consists of heating fan, heat exchangers or gas burner, filters, ventilation door, air duct.
Air ducts of 1mm galvanized steel sheet.
Aluminum fin heat exchanger, model LZ1000*1000, each group of 3 pieces, 3 groups in total. If choose the burners, the air stove is direct-fired type, no heat exchange equipment, the system automatically controls the switch, gas and energy efficiency is high.

Draft fans: model, 4-72-6C; motor power,7.5kW
Heat source:
option A: boiler capacity:at least 0.5T/hour
option B: gas burner, JG10D(max gas consumption 10 cubic/hour), 3 pieces in all, plus a boiler of 200kg/hour for hot cylinder.
2.4 Back coating system, 1 set

1. Frame: welded in ordinary steel structure
  Base plate:casting iron
2. Feeding roller, 1 set, with drive shaft head
  Diameter / roller body length :Φ240*1400mm
  Roll material:20 # seamless steel
  Coating materials :High-quality synthetic rubber
  Rubber hardness :Shore 50 º ± 2
  Cladding thickness :10mm
Roller bearing: P209
3. Metering roller,   1 set
  Diameter / roll body length :Φ190*1400mm
  Roll material:20 # seamless steel
  Roll surface treatment:chrome plated
Roller bearing: FC209
4. Pressing roller,  1 set, aluminum body
5. Water tray, 1 set, made of stainless steel
Fine tune is between feeding roller and backing roller, to control the clearance between the two rollers.
2.5 Two hot cylinders and three cooling cylinders
1. Hot cylinders

Diameter / width: Φ1250 × 1400
roller bearings, 22232 CAK/W33
Body material:  plate steel cylinders
Surface hardness: HB170-220
Cylinder surface treatment: hard chrome plated cylinder, coating thickness 0.08mm
2. Blanket guide rollers
Quantity: 5(follow final design)
Diameter / width: Φ156 × 1400mm
Material: 20 # seamless steel pipe, wall thickness 8mm
3. Cooling  cylinders
Diameter / width: Φ500 × 1400
Roller bearings: SN520
Body material:  plate steel cylinders
Surface hardness: HB170-220
Cylinder surface treatment: hard chrome plated cylinder, coating thickness 0.08mm
Dryer section with a set of drying blanket for easy paper threading and paper smoothness. Blanket corrector is manual type, tensioner is manual type.
2.6 Double-rollers soft calender
  Calender is to improve the paper surface smoothness and improve the tightness of the paper so to improve the quality of the product.

1. Hard roller, 1 set
Diameter / roll body length:Φ350/1400mm
Roller bearings:22226CAK/W33
    Roll materials:Cast iron
    Roller surface material:quality nickel-chromium-molybdenum alloy chilled cast iron
    Chilled thickness:15-20mm
 2. Soft roller, 1 set
  Diameter / roll body length :Φ400/1400mm
Roller bearings:22230CAK/W33
  Roll materials:seamless steel pipe
  Coating material:Rubber
  Rubber Hardness :Shore A 98 ± 2 °
  Cladding thickness :15mm
2.7 Winding device
Uniaxial winding, drive motor of three-phase asynchronous torque motor. Adjustment through automatic correction device, sheet tension though inverter for constant tension adjustment.

Winding drum: Φ74(or Φ149 )/1400mm, 2 set
2.8 Frame and walk stage
Beams, columns, fixed length beams all made of profile steel, walkway and pedals made of tread plate, railing of 1-inch pipe, ladder of ordinary steel.
Traverse walkway is seamless steel plate of one sheet. Frame and walkway, rust polished after machining process, then two coats of anti-rust paint, at last surface paint spray (surface paint according to customer requirements)
2.9 Foundation section,full set, including anchor bolts
       Base plate of cast iron, the material is HT-150, finish machining after aging treatment.
2.10 Paper guide rollers
Tension rollers, 4 sets
Diameter: Φ130 × 1400
Groove spreading rollers, 2 sets
Diameter: Φ150 × 1400
Aluminium guide rollers, whole sets (follow final design)
Diameter: Φ130 × 1400, Φ200 × 1400

2.11 Electrical, pneumatic control panel: whole set
Pneumatic control components and electrical components like PLC, of Siemens, inverters and motors, the joint and valve in the machine are provided.


3. The scope of supply
The scope of supply is generally to the first flange at the frame interfaced with an external connection, such as the flange of air duct, steam inlet and condensate water outlet of the cylinder and so on.
Within the boundaries, scope of supply is machine supplier, the outside is responsible for the machine purchaser or other suppliers.
 Lubricating oil as well as installation wires, spare parts, commonly used tools not in the scope of supply.
Heat source, stock preparation system and slitting machine not in the scope of supply.

Overseas Project