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Features

  • Elimination of Crushing and Blowing
  • Reduction of Felt Mark
  • Proportion of Dewatering at Press Section

    Success Flow removes the water from the wet sheet that contains much water and makes it to appropriate moisture level before reaching the press part by using vacuum action to allow the roll nip pressing.

Advantages of "Success Flow"

The wet sheet is free from "crushing", "blowing", "felt mark" or other problems unlike a roll nip pressing. The water extraction by vacuum action enhances dewatering in the following press part. Wet sheet is of appropriate moisture for pressing before reaching the press part. This is very useful particularly on the recycled paper furnish that easily makes "crushing and blowing" due to the low freeness. The degree of vacuum and the flow rate are adjustable on each zone, thus enhancing dewatering efficiency. The roll nip of the primary press usually can dewater a large amount of water from the wet sheet. However this dewatering process gives an unreasonable external force to the wet sheet, which has been the cause of crush or wrinkle on the wet sheet. With the use of Success Flow, it can be expected to strengthen the wet sheet and prevent the generation of wrinkles. Success Flow is arranged right after the last former and by the vacuum action extracts the water down to certain level to stabilize the wet sheet at the first roll nip pressure by the vacuum action. The water extraction by vacuum action also contributes to the easy dewatering at the press part. The moisture drop by Success Flow will be in the range of 7 to 10% depending on the operating conditions. The roll press dewatering at the higher sheet dryness will not make the felt mark transferring onto the wet sheet.

Total 35 units of Success Flow have been delivered to the paper mills.

Domestic (Japan) : 21 units
Overseas : 14 units

Basic Structure of "Success Flow"

Suction box

The suction box is divided into 3 compartments and the degree of vacuum is individually adjustable.

Fabric wire

Fabric wire has higher open area and is easy to be installed. Spare fabric wire is easily stored.

Ceramic blade

The use of ceramic blade keeps wire run stable with less friction, thus requiring no sealing water between the blade and the fabric.

Guiding device

The stable run realized by the use of the automatic wire guider.

Implements

Felt abrasion is minimized because the felt and blade do not contact each other.
The adoption of a cantilever designed facilitates the replacement of fabric wire.

Dewatering Data of "Success Flow"

Dewatering data obtained from our pilot machine is shown below:

Measurement Averages

Inlet Moisture
Outlet Moisture
Moisture Drop
87%
76%
11%

Comparison between Primary Press and Success Flow

The above illustrates an example in which the conventional primary press is modified to Success Flow. Since Success Flow has a compact structure, it can be added to a machine with only minimum remodeling required. The following table shows a comparison of characteristics between the conventional primary press and Success Flow

 
Conventional primary Press
Success Flow
Plybond
Bad
Good
Felt mark
Worse
Better
Bulk of wet sheet
Worse
Good
Moisture profile
Bad
Good
Dewatering at following press
Worse
Good
Operationability
Worst
Better