External mixed plural component spray gun
First Claim
1. A multiple material spray system for applying a spray by a single component spray gun comprising:
- a single component spray gun body including a first entry port for feeding a first material therethrough, a second entry port in fluid communication with said first entry port, an exit port in fluid communication with said first entry port and said second entry port, and a plurality of tube injectors connected to said first entry port for feeding a plurality of first materials therethrough;
a fluid section connected to said body at said exit port, said fluid section including a third entry port for feeding a second material therethrough;
said fluid section further comprising first and second passageways to receive said first and second materials from said exit port and said third entry port outside of the single component spray gun body, said first and second passageways for maintaining said first and second materials mutually isolated and for delivering said first and second materials for mixing exteriorly of said single component spray gun body and of said fluid section immediately before applying the spray.
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0 Petitions
Accused Products
Abstract
A multiple material spray system and method are provided for applying a spray by a single component spray gun. A first material is fed through a tube injector connected to an external port of the single component spray gun and a conventional fluid section feeds a second material through the single component spray gun without being exposed to the first material. A mixing area is positioned to receive the first and second materials outside of the single component spray gun so that these materials can be externally mixed immediately before applying a spray. The external mixing of the materials permits a spray of high viscosity, low VOC materials with fast gel times of approximately 20 to 40 seconds to be used because gelation in the single component spray gun is prevented by the external mixing. Also, the system and method reduce the number of components so that a more cost-effective process is achieved.
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Citations
20 Claims
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1. A multiple material spray system for applying a spray by a single component spray gun comprising:
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a single component spray gun body including a first entry port for feeding a first material therethrough, a second entry port in fluid communication with said first entry port, an exit port in fluid communication with said first entry port and said second entry port, and a plurality of tube injectors connected to said first entry port for feeding a plurality of first materials therethrough; a fluid section connected to said body at said exit port, said fluid section including a third entry port for feeding a second material therethrough; said fluid section further comprising first and second passageways to receive said first and second materials from said exit port and said third entry port outside of the single component spray gun body, said first and second passageways for maintaining said first and second materials mutually isolated and for delivering said first and second materials for mixing exteriorly of said single component spray gun body and of said fluid section immediately before applying the spray. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 15, 16, 17, 18, 19, 20)
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8. A method for applying a spray of multiple materials by a single component spray gun, comprising the steps of:
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feeding a plurality of first materials through the body of a single component spray gun by a plurality of tube injectors connected to an external port of the single component spray gun body; feeding a second material through a fluid section connected to the single component spray gun so that said first and second materials are not exposed to each other in said fluid section; mixing said first and second materials exteriorly of said body and said fluid section in a mixing area positioned to receive said first and second materials from said fluid section immediately before applying the spray. - View Dependent Claims (13, 14)
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Specification