Press with extended pressing zone JUMBO is cons-tructed as a double-roll press with a hydraulic loading of the upper press roll. Usually it is used as the last press before the web enters the PM drying part.

Design

The load bearing structure is designed with regards to a high static and dynamic stress and it is adapted for an easy felt exchange and press rolls removal.

The press rolls with a modern construction design are embedded in double-row spherical-roller bearings in bearing housings which enable a grease or central oil lubrication depending on the speed and load. A necessary part of the roll equipment is an inner cooling system for the roll cover temperature stabilization. The roll cover is made of highly elastic rubber with high mechanical and heat resistance.

Due to these characteristics, the pressing zone of the ”Jumbo” press is extended. The cover is crowned in accordance with the roll flattening and operating linear load calculation. There are blind bored holes to drainage water during pressing.

Both rolls are suited by press felts, each of Material
them designed individually according to the speed, linear load and the assortment produced. An essential part of the press is the regulation and felt stretching and conditioning system.

There is a double-motor drive, i.e. each press roll has its own drive unit. An electric part of the drive, control and manipulation system (control panel included), loading hydraulic system of the upper press roll and paper threading form a part of the machine.

Main parts

• Bearing structure (1)
• Press rolls and embedding (2)
• Press rolls cooling device (3)
• Hydraulic drive (4)
• Machine control (5)
• Top felt guiding (6)
• Bottom felt guiding (7)
• Machine guards and foot bridges (8)

Material

• The bearing structure and guide rolls are made of common steel
• the press rolls embedding is made of cast iron

Accessories

• Roll removal equipment
• “Jumbo” press drive (mechanical and § electric part, control included)

Scope of delivery

• Complete machine in accordance with the main parts description
• Accessories optionally