2. Table of contents: Section 1: Paper handling in general. Section 2: Damage prevention Click on your choice Forest products, pulp bales and paper rolls in particular, are one of the most demanding cargo commodities requiring specialized lift truck attachments and skilled drivers. Our education will help paper producers in the aim to deliver their products without damages.
3. Table of contents Paper handling in general Paper handling in general Daily inspection Safety rules and capacity Contact pad guide Choosing lift truck and clamps Select the correct clamping force Click on your choice
4. Table of contents Damage prevention Damage prevention in general End damage Edge damage Belly damage Out-of-roundness damage Click on your choice
5. The paper rolls may be handled up to 15 times before delivery to the customer ! The transport chain of forest products is often very long. A paper roll may require as many as 15 handling stages on its way from paper machine to the printing machine. This makes it essential to use well-chosen, well-maintained equipment dedicated to forest products handling. Paper handling in general
6. Reducing damage is our mission and the customer’s vision Paper handling in general Delivery from paper mill to customer
38. Check list for the right clamp: • Weight of the paper roll • Max- and min diameter • Roll width • Paper quality/rec clamping force • Type of wrapping • Storage and stowage pattern • Number of rolls per handling • Rotation Check list for the right lift truck: • Type of clamp • Secured lifting capacity • Height of stowage • Hydraulic functions, pressure and flows • Tilting functions • Clamp mounting Choosing truck and clamps
47. 20 + 20 = 40 kN 20 + 0 = 20 kN When handling a single roll, special attention must be paid to the total clamping pressure 20 = 20 kN Why 2, 3 or 4 arms? Choosing truck and clamps 20kn=4,480lbf 4,480+4,480=8,960lbf 4,480+0=4,480 4,480+4,480=8960lbf
48. Target is to give each roll their own clamping force Normal handling Big risk for accidents and out of roundness damge due to high clamping force on lowe rolls.
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50. Handling of jumbo rolls - Why 2, 3 or 4 arms? Choosing truck and clamps F c F n F n F c ROLL A ROLL B F c /3 F c /3 F c /3 F c /3 F c /3 F c /3 F n /3 F n /3 F m F m F m F m F m F m F m F m F n /3 F n /3 Micro and macro friction F n /3 F n /3
51. Short arm should be against the floor while lifting a roll from the ground Short arm makes handling in tight spaces easier and minimizes the risk of roll damage Short and long arm Choosing truck and clamps Short arm inside Long arm outside
56. Contribute to everyone’s safety: If you find anything wrong with the lift truck or the attachment, the service staff should be notified at once ! Daily inspection Don´t drive like this ! This is perfect !
63. With worn out pads, the required clamping force can be up to three times higher ! Worn out pad Good pad Contact pads guide Rubber-faced Cross grooved Cast pad Worn out pad Theoretical clamping force with 1000 kg (2,200 lbs) paper roll Clamping force kp Steel sprayed
67. Max clamping force according to weight of the roll: Paper quality Clamping factor Newsprint 1.0-1.4 Kraftliner 1.5-1.8 SC Printing paper 1.6-1.8 LWC print.paper/KCB Kemiart 1.7-2.0 Roll Tissue/Fluff Paper 1.1-1.3 For example: Total paper weight 6,000lb x factor 1.3 = total pressure = 7,800lbf What is correct clamping force ? Measuring and control of clamping force Selecting the correct clamping force
68. Always follow the paper mill’s instructions! Selecting the correct clamping force
69. Measuring and controlling the clamping force Exampel from newprint, SC and LWC producers Selecting the correct clamping force
70. Equipment for adjusting the clamping force Completely automatically with the CTX-series intelligent paper roll clamp Manually with the four stage pressure relief valve Selecting the correct clamping force
90. NAIL Damage prevention End damage CLEAN STORAGE AND TRAILER FLOORS BEFORE LOADING ROLL ONTO THEM. REMOVE ALL PROTRUDING OBJECTS, NAILS, ETC. FROM THE LOADING AREA. DO NOT PUSH THE ROLL ON THE FLOOR.
93. Use the correct clamp size according to roll dimensions ! The clamp is designed for a larger roll. The clamp is correct for the roll diameter. Open the clamping arms sufficiently when clamping a roll. Damage prevention Belly damage
94. Clamping too deep • Clamp pad corners press the roll • Clamping arms press the roll • Pad corners and arm frame cause local deformations on the roll surface • Risk for dropping the roll due to incorrect clamping Tip clamping • Rolls may drop or “spit” out when braking Pivot arm clamps • Rolls with diameters varying from 90% to maximum should be clamped against the clamp frame. Clamp smaller rolls with contact pads only – no contact against the frame. Sliding arm clamps • Clamp rolls against the push plates. Damage prevention Belly damage
97. Incorrect clamping distributes the weight unevenly ! Damage prevention Belly damage • Clamping the rolls at the bottom exposes the roll wrapper to stress
98. Do not use the clamp to push the rolls ! Damage prevention Belly damage
99. Incorrect Correct - the long arm is positioned on the outside of stack Short arm inside ! Damage prevention Belly damage
105. • Out-of-roundness is measured by the difference of radius • Measured in millimeters (mm) • Depending of the amount of handling times it gives different shape of damage Damage prevention Out-of-roundness
106. Most common incorrect handling: clamping over paper roll edge Damage prevention Out-of-roundness
107. Damage prevention Out-of-roundness – Wrapping as a load carrier F t F t F n F n F r F r Wrapper F c F c Wrapper carries approx 30 % of roll weight
