Method and apparatus for flame spraying thermoplastic powders
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C23C-004/129
B05B-007/14
B05B-007/16
B05B-007/20
B05B-012/00
B05B-012/10
B05D-001/10
B05D-003/02
B05B-015/20
출원번호
US-0036166
(2014-11-12)
등록번호
US-10190205
(2019-01-29)
우선권정보
IT-BO2013A0619 (2013-11-12)
국제출원번호
PCT/IB2014/065991
(2014-11-12)
국제공개번호
WO2015/071840
(2015-05-21)
발명자
/ 주소
Giovannini, Susanna
출원인 / 주소
IBIX S.R.L.
대리인 / 주소
McGlew and Tuttle, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
The method for spraying thermoplastic powders provides to feed a flow of compressed air and/or nitrogen and a liquefied petroleum gas through respective separated discharge chambers (9, 12), shaped inside a mixing device (1) of a spray gun (100), the separated discharge chambers (9, 12) being in com
The method for spraying thermoplastic powders provides to feed a flow of compressed air and/or nitrogen and a liquefied petroleum gas through respective separated discharge chambers (9, 12), shaped inside a mixing device (1) of a spray gun (100), the separated discharge chambers (9, 12) being in communication with a mixing chamber (15). Then a flame is ignited at the mixing chamber, through a flame ignition device (30) connected with the gun (100), said device comprising a spark ignition device (31, 310), and a conductor element (32) associated with the mixing device (1) and connected with the spark ignition device (31, 310). The thermoplastic powders are mixed with a transport inert gas, and fed through a further discharge chamber (7) communicating with the mixing chamber (15). Then the spray gun is operated to spray the thermoplastic powders through the flame onto the surface of the article to be coated, to cause the melting of the same powders.
대표청구항▼
1. An apparatus for flame spraying thermoplastic powders, the apparatus comprising: a spray gun configured to perform spraying of thermoplastic powders and to be fed with a liquefied petroleum gas for producing a flame to be directed on an article to be coated in order to heat a surface of said arti
1. An apparatus for flame spraying thermoplastic powders, the apparatus comprising: a spray gun configured to perform spraying of thermoplastic powders and to be fed with a liquefied petroleum gas for producing a flame to be directed on an article to be coated in order to heat a surface of said article to a predetermined working temperature, said spray gun comprising a mixing device internally defining separated discharge chambers, said separated discharge chambers being configured to be fed with said thermoplastic powders to be sprayed with a transport inert gas, with a flow of compressed air and/or nitrogen and with said liquefied petroleum gas, and said spray gun comprising a mixing chamber communicating with said separated discharge chambers;a flame ignition device for igniting said flame, connected to said spray gun and said flame ignition device comprising a spark ignition device, and a conductor element associated with said mixing device and said conductor element being connected to said spark ignition device so as to produce a spark at said mixing chamber;a flame detection and monitor device configured to detect and monitor a presence of said flame;an actuator means for interrupting or enabling a feed of the liquefied petroleum gas, said flame detection and monitor device being connected, directly or indirectly, with said actuator means, said spark ignition device comprising a piezoelectric spark ignition device fixed to said mixing device, said piezoelectric spark ignition device being provided with an activation means, said flame detection and monitor device comprises a temperature detection means associated with said mixing device;a duct for feeding said liquefied petroleum gas in communication with one of said separated discharge chambers configured to be fed with said liquefied petroleum gas, said actuator means comprising a valve associated with said duct and said valve being housed in an external tubular element mounted on an end of said spray gun so as to intersect said duct, said valve being connected with said temperature detection means and said spark ignition device being mounted in a fixed manner on said external tubular element. 2. An apparatus according to claim 1, wherein said conductor element comprises at least one first portion extending longitudinally to the mixing device and said spark ignition device is arranged at a rear portion of the spray gun. 3. An apparatus according to claim 1, further comprising a cooling device associated with said mixing device for cooling said spray gun, said cooling device comprising a hollow tubular body provided with at least one inlet opening and at least one outlet opening and arranged in a way as to define, about said mixing chamber, a cooling chamber wherein a cooling fluid is to be fed, said cooling device further comprising a feed means for said cooling fluid, rigidly connected with said at least one inlet opening, and said cooling device further comprising at least one cooling member of the fluid, rigidly connected with said feed means of the fluid. 4. An apparatus according to claim 3, wherein said at least one inlet opening and said at least one outlet opening are arranged on a longitudinal wall of said hollow tubular body. 5. An apparatus according to claim 4, wherein said cooling member is a pneumatic type cooling member. 6. An apparatus according to claim 3, wherein said cooling member is a pneumatic type cooling member. 7. An apparatus for flame spraying thermoplastic powders, the apparatus comprising: a spray gun comprising a spray gun housing having an outer spray gun housing surface, said spray gun being configured to perform spraying of thermoplastic powders and to be fed with a liquefied petroleum gas for producing a flame to be directed on an article to be coated in order to heat a surface of said article to a predetermined working temperature, said spray gun comprising a mixing device internally defining separated discharge chambers, said separated discharge chambers being configured to be fed with said thermoplastic powders to be sprayed with a transport inert gas, with a flow of compressed air and/or nitrogen and with said liquefied petroleum gas, and said spray gun comprising a mixing chamber communicating with said separated discharge chambers, said mixing chamber being located in an interior of said spray gun housing;a flame ignition device for igniting said flame, connected to said spray gun and said flame ignition device comprising a spark ignition device, and a conductor element associated with said mixing device and said conductor element being connected to said spark ignition device so as to produce a spark at said mixing chamber, said conductor extending from said spark ignition device to said mixing chamber, said conductor comprising a conductor end portion and another conductor portion, said conductor end portion being located in said mixing chamber, said another conductor portion extending along said outer spray gun housing surface at a position located outside of said spray gun housing, at least a portion of said flame ignition device engaging said spray gun housing outer surface;a flame detection and monitor device configured to detect and monitor a presence of said flame;an actuator means for interrupting or enabling a feed of the liquefied petroleum gas, said flame detection and monitor device being connected, directly or indirectly, with said actuator means, said flame detection and monitor device comprising a temperature detection means associated with said mixing device;a duct for feeding said liquefied petroleum gas in communication with one of said separated discharge chambers configured to be fed with said liquefied petroleum gas, said actuator means comprising a valve associated with said duct and said valve being housed in an external tubular element mounted on an end of said spray gun housing so as to intersect said duct, said valve being connected with said temperature detection means and said spark ignition device being mounted in a fixed manner on said tubular element. 8. An apparatus according to claim 7, wherein said spark ignition device comprises a piezoelectric spark ignition device fixed to said mixing device, said piezoelectric spark ignition device being provided with an activation means for activating said piezoelectric spark ignition device such that said piezoelectric spark ignition device generates an electrical charge. 9. An apparatus according to claim 8, wherein said electrical charge is delivered to said mixing chamber via said conductor. 10. An apparatus according to claim 7, wherein said conductor element comprises at least one first portion extending longitudinally to the mixing device and said spark ignition device is arranged at a rear portion of the spray gun. 11. An apparatus according to claim 8, wherein said spark ignition device is mounted in a fixed manner on said external tubular element. 12. An apparatus according to claim 11, further comprising a cooling device associated with said mixing device for cooling said spray gun, said cooling device comprising a hollow tubular body provided with at least one inlet opening and at least one outlet opening and arranged in a way as to define, about said mixing chamber, a cooling chamber wherein a cooling fluid is to be fed, said cooling device further comprising a feed means for said cooling fluid, rigidly connected with said at least one inlet opening, and said cooling device further comprising at least one cooling member of the fluid, rigidly connected with said feed means of the fluid. 13. An apparatus according to claim 12, wherein said at least one inlet opening and said at least one outlet opening are arranged on a longitudinal wall of said hollow tubular body. 14. An apparatus according to claim 13, wherein said cooling member is a pneumatic type cooling member. 15. An apparatus for flame spraying thermoplastic powders, the apparatus comprising: a spray gun comprising a spray gun housing having a spray gun housing outer surface, said spray gun being configured to perform spraying of thermoplastic powders and to be fed with a liquefied petroleum gas for producing a flame to be directed on an article to be coated in order to heat a surface of said article to a predetermined working temperature, said spray gun comprising a mixing device internally defining separated discharge chambers, said separated discharge chambers being configured to be fed with said thermoplastic powders to be sprayed with a transport inert gas, with a flow of compressed air and/or nitrogen and with said liquefied petroleum gas, and said spray gun comprising a mixing chamber communicating with said separated discharge chambers, said mixing chamber being located in an interior of said spray gun housing;a flame ignition device for igniting said flame, connected to said spray gun and said flame ignition device comprising a spark ignition device, and a conductor element associated with said mixing device and said conductor element being connected to said spark ignition device so as to produce a spark at said mixing chamber, said conductor extending from a position located external to said spray gun housing outer surface to a position in said mixing chamber, wherein at least a portion of said conductor is arranged in said mixing chamber and another portion of said conductor is directly connected to said spark ignition device at a position located outside of said spray gun housing, at least a portion of said flame ignition device engaging said spray gun housing outer surface;a flame detection and monitor device configured to detect and monitor a presence of said flame;an actuator means for interrupting or enabling a feed of the liquefied petroleum gas, said flame detection and monitor device being connected, directly or indirectly, with said actuator means, said flame detection and monitor device comprising a temperature detection means associated with said mixing device;a duct for feeding said liquefied petroleum gas in communication with one of said separated discharge chambers configured to be fed with said liquefied petroleum gas, said actuator means comprising a valve associated with said duct and said valve being housed in an external tubular element mounted on an end of said spray gun housing so as to intersect said duct, said valve being connected with said temperature detection means and said spark ignition device being mounted in a fixed manner on said external tubular element. 16. An apparatus according to claim 15, wherein said spark ignition device comprises a piezoelectric spark ignition device fixed to said mixing device, said piezoelectric spark ignition device being provided with an activation means for activating said piezoelectric spark ignition device such that said piezoelectric spark ignition device generates an electrical charge. 17. An apparatus according to claim 16, wherein said electrical charge is delivered to said mixing chamber via said conductor. 18. An apparatus according to claim 15, wherein said conductor element comprises at least one first portion extending longitudinally to the mixing device and said spark ignition device is arranged at a rear portion of the spray gun.
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이 특허에 인용된 특허 (2)
Rangaswamy Subramaniam (Stony Brook NY) Marantz Daniel R. (Sands Point NY) Miller Robert A. (Oak Park MI), Method for making an abradable material by thermal spraying.
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