What Is A Fourdrinier Machine? Long Wire Paper Machine, Widely Used Paper Machine. The Fourdrinier Paper Machine, Also Known As Fourdrinier Paper Machine, Is Mainly Characterized By A Belt Shaped Forming Part Composed Of Endless Nets.It Is Composed Of Wet End (including Headbox, Shaper And Press Part) And Dry End (drying, Calendering And Coiling). According To The Number Of Formers And Drying Cylinders, It Can Be Divided Into Single Long Mesh, Double Long Mesh, Long Mesh, Long Mesh Multi Cylinder, Yankee Type And Other Models; According To The Speed, It Can Be Divided Into Low Speed And High Speed. Most Of The Paper Machines Producing Newsprint And Other Bulk Products Are High-speed Paper Machines, With Large Output, Speed Of More Than 1200m/min And Width Of 10m.

1. Wear: First, Parts And Equipment That Have Been In Contact With Copper Mesh, Woolen Cloth Or Paper Pulp And Formed Paper For A Long Time, Such As Pulp Pump, Pulper, Desander, Vacuum Box Panel, Press Roll, Calender Roll, Etc; The Second Reason Is That Parts With Relatively Frequent Movement Between Parts, Such As Scrapers, Steam Inlet Heads, Cylinders, Vacuum Couch Rolls, Vacuum Pumps, Etc.2. Lubrication: Mechanical Rotation Can Not Be Separated From Bearings. For Paper Machines, Mainly With Rotating Rollers, There Are Many Types And Quantities Of Rollers, And There Are Hundreds Of Bearings Of Various Models. Therefore, Lubrication Management Is Very Important, Especially Under The Influence Of Water, High Temperature And Heavy Load. Lubricating Oil (grease) Is Easy To Run Off, Evaporate And Age, Thus Damaging The Lubrication Effect, Causing Bearing Damage And Shaft Head Wear. Therefore, It Is Essential To Check And Refuel Regularly.3. Fatigue: Heavy Loaded And Continuously Running Machinery Is Prone To Fatigue Damage. On Paper Machine, Due To The Restriction Of Mechanical Structure And Operation Principle On Some Parts, The Design Strength Of Parts (such As Mesh Table Shaking Spring Plate, Electromagnetic Clutch Suction Cup, Coupling Anti Overload Pin, Etc.) Should Not Be Too Large To Avoid Damage. Measures Such As Maintenance And Technical Transformation Can Be Taken To Solve The Problem.

During The Use Of The Equipment Or System, It Is Called Equipment Failure When The Equipment Or System Is Shut Down Due To The Loss Of Specified Functions Or Reduced Efficiency For Some Reason. There Are Two Main Types Of Downtime Failures Of Paper Machines: Productive Inherent Failures And Equipment Failures.（1） Characteristics And Rules Of Productive Inherent Failure ShutdownThis Type Of Shutdown Is Mainly To Ensure The Product Quality And Meet The Production Process Requirements, Especially For The Production Of Cultural Paper. The Main Reasons For The Shutdown Are: First, The Scrubbing Work. The Functions Of The Wet End Filter And Dehydration Elements (or Materials) Decline After A Certain Period Of Use, And The Dewatering And Filtration Cannot Reach The Initial Effect, So They Need To Be Cleaned Regularly. Second, Replace The Main Process Equipment, Such As Copper Mesh And Woolen Cloth, Which Need To Be Replaced Regularly After Reaching The Service Life; The Press Cots And Stone Rolls Are Worn By The Paper And Scraper, And The Middle Height Of The Roll Surface Changes, Which Will Affect The Product Quality, And They Also Need To Be Repaired Regularly.（2） Characteristics And Analysis Of Equipment Fault ShutdownDue To The Particularity And Complexity Of The Paper Machine Production Process, Equipment Failures Have The Following Characteristics:1. There Are Many Equipment Failure Points, And Equipment Failure Shutdown Often Occurs;2. The Service Life Of Some Parts Is Short, And The Frequency Of Replacing Spare Parts Is High;3. There Is A Large Gap Between The Failure Cycle And The Maintenance Time Occupied, Which Is Difficult To Manage. There Are Many Reasons For The Equipment Failure Of Paper Machine. Causing Equipment

It Is Customary To Divide The Paper Machine Into Long Wire, Round Wire, Clip Wire, Long Wire And Other Models According To The Type Of Paper Shaper Used; There Are Also Cultural Paper Machines (including Newsprint), Cardboard Machines (including Packaging Paper), Toilet Paper Machines And Special Paper Machines According To Their Main Product Varieties; Or It Can Be Divided Into Thin Paper Machine, Cardboard Machine And Conventional Paper Machine According To The Thickness Of Paper Produced.