CASE STUDY: WATER FILTRATION MEMBRANE
CHALLENGE 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.
SOLUTION RESULTS Feed the poly at a low tension into the dies and The low tension feed along with the dual direction develop a dual direction distortion to the pattern and distortion developed specifically for the cutting pattern the die allowing the poly to naturally distort during size and pattern density proved to allow consistent the cutting process, but end up at the correct size relaxed part size, which allowed the ability to create and accuracy after cutting and relaxing. The solution production worthy consistent part size. created a speed mismatch between web and die and created a die diameter significantly larger than the nominal die diameter.
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