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US 2012/0183700 A1Published application
Method for dispensing foam onto substrates of large width
AssigneeNordson Corporation
InventorsRonald Burger, Frank Jones, Dirk Pannhausen
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Abstract
A method for dispensing a foamed material onto a substrate surface, including: generating a relative movement between a substrate surface and a material dispensing apparatus exit opening, mixing at least two material components in a mixing device, generating a pressure differential between the mixing device and a dispensing region, conveying the dispensing material from the mixing device to the exit opening, and discharging the dispensing material from the exit opening onto the substrate surface.
Claims13
A method for dispensing a foamed material onto a substrate surface, comprising:
- generating a relative movement between the substrate surface to be coated and an exit opening of a material dispensing apparatus,
- mixing at least two material components in a mixing device for providing a free-flowing foamable dispensing material,
- generating a pressure differential between the mixing device and a dispensing region located downstream in the direction of flow from a discharge cross-section of the exit opening,
- conveying the dispensing material from the mixing device to the exit opening, and
- discharging the dispensing material from the exit opening onto the substrate surface, wherein the dispensing material is kept under such a pressure in an upstream, adjacent region relative to the discharge cross-section of the exit opening that the dispensing material in the upstream, adjacent region has a foaming rate that is less than 10% of the foaming rate which ensues at the end of the foaming process.
2 more elements
Dependencies are inferred from the claim text.