General specification

• Automatic high speed corrugated 3 layer paper production line
• Design width: 2200mm
• Design speed: 150m/min
• Production speed: 120-140m/min
• Corrugated type: A, C, B, E(Depends on the customer's requirement) 
• Heating source: steam
• Steam requirements: 
  •  - Steam consumption: 2000kg/Hr
  • - Steam pressure: 0.8-1.2Mpa
• Power supply: 380V, 50Hz
• Nominal power: 150KW
• Line floor area: 50m*10m*4.5m
• The line is composed of shaftless mill roll stand, fingerless single facer, preheater, double bridge, gluer machine, double facer machine, cut off machine, slitter scorer machine, stacker, glue making system etc. as below list:

Please contact us for the detail information and techniacl specification for 3 layer paper production line. 

Shaftless mill roll stand

• Symmetrical structure design, available to load 2 paper roll at the same time on both side and change paper roll without stopping the line.
• All the operation like lifting, clamping, loosening, traverse moving etc. are driven by hydraulic.
• It equips with disc brake system so as to adjust web tension conveniently

Preheater & Multiple-preheater

• The preheater roller is in accordance with the national pressure vessel standard.
• The surface of the preheater roller is well treated by precision grinding and chrome plated, so as to make the roller durable.
• The heating angle is adjustable within 360^o so as to adjust the paper heating surface and make sure the paper heated evenly.

 Fingerless single facer

• Cardboard transmission is achieved by the method of vacuum suction, it equipped with high pressure air blower as well as a muffler, with adjustable of air blowing rate, to keep flute profiles stable under high speed.
• All the corrugated rolls, pressure roll, gluing roll are pneumatically controlled, and the air control unit and electrical control unit are concentrated in a cabinet.
• The main structure and frame are made of cast iron, up to the thickness of 200mm, equipped with independent gear box and cardan drive with submerged lubrication system to avoid noise and run stable.
• The shafts of corrugated and pressure roll are all heat resisting and lubricated by lubricating grease.
• The corrugated roll is made of 48CrMo alloy steel, with the treatment of hardening and tempering, grinding, laser-quenching, to reach the hardness of HRC60^o
• The pressure roll is made of medium carbon steel, with the treatment of hardening and tempering, grinding and chrome plated, the roll up and down is controlled by cylinder.
• The gluing roll is treated with grinding, mesh snicked and chrome plated on the surface, while the doctor roll has the same treatment.
• The gluing unit could be taken out integrally which is convenient for gluing roll maintenance and replacement. the gluing wall is sliding plate structure, pneumatic control glue supplying, the glue quantity is digital displayed.
• The gluing unit is available to run independently or non-independently. 
• The pre-heater is made of seamless steel tube, and connected by flexible metal hose.  

Double glue machine

• Parameters can be displayed and operated on the LCD screen interface.
• With the process of quenching and tempering surface treatment,  dynamic balance, surface finishing grinding, and then crave the overlapping curve on the surface, the gluing roller  reaches a high quality level which assures gluing even and saves its volume.
• The rotation of gluing roller is controlled by frequency converter and converter motor, which assures the gluing roller runs the same step with the double face machine, also it's available to run independent.
• The adjustment of glue quantity is achieved by electric or manual, and the glue quantity will digital displays on the LCD screen.
• Equipped with self-circulating glue supplying system to control the glue supply quantity and avoid glue depositing, keep a good quality of glue and save its volume.  
• Pneumatic control of the pressure roller lifting, while the gap micro-adjusted by electric.
• All of the rollers are well treated with grinding and chrome plated.
• Roller type encoder is equipped to detect the speed signal of double face machine, in order to make the gluing roller running the same step with the double face machine.  

1. Heavy bridge conveyor

• The case of air blower is made of steel plate with finishing of grinding and chrome plated, and equipped with high-power vacuum pump
• Equipped with vacuum auxiliary braking system.
• The paper guide driven by the gear motor to control the cardboard edge orderly.

Double face machine

• The heating plates are made of pressure vessel board which are in accordance with the national standard, while the surface is will treated with grinding and chrome plated.
• The hot-plated is composed of intensive gravity press roll structure, while its' inner structure is separated into "S" shape, which are good for steam and water separation, and improves the steam utilization. 
• The lifting of press roll is controlled by hydraulic.
• The upper conveyer belt is designed to adjust offset automatically, and two sets of tension adjustment system are additional, one for manual fine-turning, one for quick pneumatic adjustment.
• The upper "S" shape cotton belt device is equipped with double cylinder.  
• The lower cotton belt is available for "S" shape manually adjusting offset and tension, one set of pneumatic fine-turning system is additional.
• The drive roll is covered by wearproof rubber, ensures the cardboard flat transmission.
• The main drive motor is an energy saving converter motor, with the features of  low speed and large torque, wide rang of speed adjustment, and easy maintenance.
• All of the electrical components are in according with the national standard.
• The main structure is made of high tensile steel and GB profiles, with a firm structure, beautiful shape, running stable with high speed. 

NC thin blade slitter scorer

• 999 group of orders storage is available, changing order automatically without stopping the line, manual changing order is available too.
• Just need 3-8seconds for the quick order changing, with the helical cross cutter machine together to achieve qucik order changing without speed down.
• Automatically follow up the speed of production line, synchronize with the production, also can be implanted into production management system.
• The CNC control system is composed of imported high quality industrial PC and PLC.
•  Equipped with three type of scores: concave-convex(3ply), convex-concave(5ply), convex-flat, these 3 type could be electrical converted automatically, as well as the depth of scores.
• The blades are made of tungsten alloy steel, the lifetime will over 3 million meter.
• Both automatic self blade sharpening system and manual blade sharpening system are available, and both systems could be operated without stopping the line, which improves the working efficiency.
• Equipped with imported synchronous belt drive device, which has the advantages of high precision and low noise.  

NC Helical cross cutter

• 200 group of orders storage is available, changing order automatically without stopping the line, also could be implanted into production management system.
• The transmission gear of cutter shaft is made of precise forging steel with high frequencny quenching, which makes an non-backlash and high precision transmission.
• The blade is made of rapid steel, to reach a long lifetime, and the blade is helical structure designed, with sawtooth shape, scissors cut.
• The sun shape wheel type of paper feeding roller guarantee a uniform pressure and stable delivery.
• The main structure and frame are made of gray cast iron, it's good at anti-vibration and rigidity.
• It's a energy saving type cutter, which saving 70% of energy compared to the normal type.
• Equipped with Germany imported servo controller and 10.4 inches coloured touch screen made in Taiwan. 

Paper sheet delivery and side conveyor

• The main structure is welded by 14# U-steel, electrical adjusting paper size. 
• Transverse transmission of paper sheet is controlled by pneumatic, the speed is adjustable.
• Vertical paper sheet transmission is achieved by wide conveyer belt.
• Foot switch is equipped to control the outputting of paper sheet when the quantity or height reaches the demand.

Glue making system 

• The main pourpose of this system is providing starch glue for single facer and glue machine.
• The system is composed of loading tank, main tank, storage tank, deliver pump and circulating pump.
• The horizontal type glue making machine is able to produce a large quantity of glue.    
• A glue supplying pump is equipped to deliver the glue to the machines form the glue tank.
• The glue storage tank equipped with a stirring device, to avoide the glue precipitating. 

Please contact us for the detail information and techniacl specification for 3 layer paper production line.