Restricted flow die

B - Operations – Transporting – 05 – C

Patent

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Details

B05C 5/02 (2006.01) B05C 1/06 (2006.01)

Patent

CA 2211234

A coating device has a first half (14) and a second half (16) located adjacent the first half to form a slot (18) between the first and second halves. A porous material (10), having a tickness greater than the height of the slot (18), is disposed in the slot to compress uniformly along its width. The porous material (10) has a porosity and a height selected in combination with each other to create a predetermined pressure drop through the slot (18) and to maintain the pressure drop to create the desired flow rate along the slot width. The size of the pores in the porous material (10) can be less than 25 µm and the exit pressure drop through the slot can be at least one thousand times greater than could be obtained without the porous material.

Un dispositif de revêtement comprend une première (14) et une deuxième (16) moitiés adjacentes de manière à former une fente (18) qui les sépare. Un matériau poreux (10), plus épais que la hauteur de cette fente (18) et disposé dans ladite fente en étant comprimé uniformément sur toute la largeur de celle-ci, présente une porosité et une hauteur choisies conjointement pour créer au travers de cette fente (18) une baisse de pression déterminée et pour maintenir cette nouvelle pression afin de produire un débit souhaité tout au long de la largeur de la fente. La dimension des pores du matériau poreux peut être inférieure à 25 µm et la baisse de pression, mesurée à la sortie de la fente, peut être au moins mille fois supérieure à celle pouvant s'obtenir avec ce matériau poreux.

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