抄録
Big mergers have been going on in Europe ignoring nation's boundaries. Recent concern in papermachine design is to increase a machine speed to its maximum, while improving product quality and operating efficiency demanded by customers.
The present fastest running speeds are 1, 712 m/min. for newsprint machines, 1, 625 m/min. for SCA machines and 1, 547 m/min. for LWC machines. Machine builders, like Voith, are working to develop a newsprint machine of 2, 000 km/day. as an average figure through a year.
Interesting design concepts are as follows.
Inlet : Profile control by consistency adjustment
Wire section : Gap forming
Press section : Shoe press
Dryer section : Single deck
Size press : Film coating
Calendar : On-machine with soft rolls
Reel : Center-wind
