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Paper Machine
The manufacture of endless paper is a complex and technically demanding process. The machines used in the manufacturing process are, irrespective of the entire constructive variety, largely made up of the same elements: headbox; wire section, press and dryer section, size press. The fibrous materials are mixed in the stock preparation area prior to the headbox and enriched with auxiliary aids such as glue, kaoline and colorants. seepex progressive cavity pumps are ideally suited for this thanks to their characteristics. The conveying is gentle and by way of low pulsation, the metering of auxiliary aids is exact and the speed and the flow rate can be controlled.
In the paper machine the headbox distributes the fibre mixture uniformly via the width of the machine. The fibres settle in the subsequent wire section, a constantly circulating wire, while water is sucked downwards. The dehydration takes place in the press section by way of pressure of mechanical roller pairs. In the following drier section a damp-heated drying cylinder is then used to further remove water from the paper, while a relative residual dampness remains. Normally the paper web is impacted in this section by using additional surface hardener via a size press with a glue or starch solution. seepex progressive cavity pumps are also used to convey this solution because nothing is left to chance in this process either.
A part of the paper machines contains a machine calender at the end of the compacting and smoothing of the paper web. The finished paper web is wound up on a steel shaft where it remains up until finishing or possible coating and laminating which is the main area of application of progressive cavity pumps in the paper industry.
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