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COMMON DEFECTS�&�Their�Causes�In�Calendering8
A Info-Series By Rubber Machinery World - http://rubbermachineryworld.com
Image: A New 3-Roll Calender from Bharaj Machineries
http://rubbermachineryworld.com�
INFORMATION ON EQUIPMENT, TECHNOLOGY,
INNOVATION & SUPPLIERS M MRUBBER Rubber
MachineryWorld
» Incorrect crowning of calender rolls
» Excessive wearing of bearings
» Improper operation of roll bending/zero clearance devices
» Roll temperature too high
» H igh feed bank on to the rolls
» Compound Stock warmed up for longer duration
» Insufficient break-down of your compound
» I nadequate temperature control
» I nsufficient compound feed in the banks
» Roll temperature too high
» L arge nip opening
» S tock warm up for long time
» H igh Compound in the nips
» Insufficient nip opening between rolls
» E xcess compound in the nip
» I mproper roll crown
» H igh compound viscosity
» Improper Roll temperature
» I mproper running speed
» L ow compound viscosity
» I mproper warming of the compound
» High viscosity compound
» I mproper warm up, high bank
» N on uniformity of warm up
» L ower roll temperature
» Lower temperature in one of the rolls
» H igh friction ratio
» H igh calendering speed
» U se of anisotropic fillers
Choose Wisely. Operate Smartly