Method and apparatus for dispensing foam materials

Details Method and apparatus for dispensing foam materials Method and apparatus for dispensing foam materials

1994-05-17

1996-09-17

Edwards, Laura

Coating apparatus

Projection or spray type

118410, 239137, B05B 100

Patent

active

055564712

ABSTRACT:
A method and apparatus for dispensing a polymer foam includes apparatus for forming a pressurized solution of intermixed polymeric material and gas. The polymeric material remains intermixed with the gas while the solution is maintained above a critical pressure. The pressurized solution is dispensed in wide band through an elongated slot. The dispensing apparatus includes an exit slot section in which the pressure of the solution drops below the critical pressure and the foam begins to form. The solution is maintained above the critical pressure until the solution enters the exit slot section so that premature foaming of the material is prevented.

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Walter Michaeli, Extrusion Dies for Plastics and Rubber, second revised edition, 1992, pp. 134-150.

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