Solvent-free plural component spraying system and method
AssigneeCastagra Products, Inc.
InventorsRyan Winston Monchamp, Peter Paul Roosen
Life of this patent
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Abstract
Solvent-free spraying system including methods and apparatus for spraying plural component materials without requiring the use of solvents to flush out equipment or as part of the materials being dispensed. Materials sprayed can have simultaneously widely varying viscosities, pressures, temperatures and ratios between two or more respective components being combined by the spraying apparatus. Cure rates and gel times can vary widely from hours to less than 10 seconds for mixing and dispensing various plural component thermoplastic and thermosetting materials including foams, moldings and coatings made from urethanes, ureas, epoxies, polyesters, phenolics and other chemical compositions that react rapidly upon mixing of the components thereof.
Claims19
A plural component spraying system comprising:
- a set of ratio proportioning pumps for delivering two or more respective components of a plural component fluid formulation under pressure;
- a heating system to heat said respective fluid components;
- a mixing and dispensing apparatus into which said respective fluid components enter under pressure which includes an impingement mixing element, a backpressure element, a static mixer housing that contains one or more static mixing elements and an orifice portion from which mixed material is dispensed;
- wherein
- said impingement mixing element of said mixing and dispensing apparatus has entry ports and a mixing chamber configured such that said respective fluid components enter under pressure and initially mix by impingement mixing;
- said orifice portion of said mixing and dispensing apparatus is located downstream of said static mixer housing;
- said backpressure element is located between the respective fluid component entry ports of the impingement mixing element and said orifice portion;
- the static mixer housing is easily and quickly removable to facilitate replacement of the static mixing element(s);
- said system further comprising
- temperature controllers for said fluid components;
- a device for setting and maintaining a set ratio between said proportioning pumps.
Dependencies are inferred from the claim text.