The story of a screen

"The story of the cross-tensioned plastic screen that we are telling here goes back to the early 1980s. We developed the product with a few small improvements, such as slightly reducing the size of the screen to make it easier to handle."

Although Claudio Lobina only became the sales director in charge of raw material screens at HEIN, LEHMANN in 2011, he knows all there is to know about the history behind this screen. For one thing, he knows, that the first major change was made to the product in July 1988.

"The screen previously had a dimension of 1,200 millimeters. Now it was split into two parts. The reason for that is easy to explain: a plastic screen of this size is difficult to handle. Splitting it was to make for easier installation."

It was no sooner said than it was done – and that is how it happened. In September 1988, the split was then reoptimized after consultation with the customer – two parts of different sizes were made into two halves of exactly the same size.

"This step of splitting the screen was taken in close cooperation with our customer, who saw potential for improvement in its daily application. Of course, we don't have to be told twice. Receiving feedback and implementing it is what we do, and what we did in this case as well."

But the screen, as it is today, had not yet arrived at the end of its journey. The years 1990-1994 brought new changes in terms of deflectors:

"It was during those years that the engineers optimized the deflectors. There were several trials of various shapes and fixtures until the best possible option had been found: square-shaped, fixed-molded deflectors that optimally ensured that the material spread over the entire surface, so there was no concentrated material wear on just one particular area."

After this improvement, attention shifted to the screen's underside in subsequent years. New casting molds reinforced the bottom cross braces, improving the service life.

"The most recent change to the screen was made in 2014. We now offered screens with plastic overlaps instead of the previously used ceramic plates. That meant much less effort than having to glue the plates together with every installation."

At HEIN, LEHMANN, it is not only the employees who grow with their tasks and experiences. Our products do as well. To this end, we are committed to doing the best possible job every day.

Do you still need some more screening technology to complete your success story? Then contact us – we will gladly advise you!