OVER 50 YEARS OF ENGINEERING EXPERIENCE bernalrotarydies.com bernalrotarysystems.com sales@bernalinc.com 2960 Technology Dr. Rochester Hills, MI 48309 1.800.BERNAL1 CASE STUDY: WATER FILTRATION MEMBRANE Die cut a low density polyethylene large format part with a complicated high density cutting pattern accurately so they can match in a tall stack and form water passages for an ionic desalinization process. The density of the poly would distort significantly during cutting and would not maintain the size and shape of the cutting pattern on the die. Feed the poly at a low tension into the dies and develop a dual direction distortion to the pattern and the die allowing the poly to naturally distort during the cutting process, but end up at the correct size and accuracy after cutting a

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