A powder supply device that continuously supply a fixed amount of powder, including a powder accommodation container including a powder delivery hole in an circular outer shape bottom plate, and a disk that continuously rotates and conveys the powder by a groove facing the powder delivery hole and provided on circumference, wherein the disk is disposed to be slidably rotatable with respect to the circular outer shape bottom plate in a state in which a part of a region where the groove is located is covered with the circular outer shape bottom plate of the powder accommodation container.
G01F 11/24 - Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers moved during operation of the valve type, i.e. the separating being effected by fluid-tight or powder-tight movements wherein the measuring chamber rotates or oscillates for fluent solid material
The purpose of the present invention is to provide a powder supply device that, while stably and continuously supplying a specific amount of a powder, achieves simplification and miniaturization of the device. In order to achieve this purpose, a powder supply device that continuously supplies a specific amount of a powder is employed, the device being characterized in that: a powder accommodation container that has a powder delivery hole in an outer circular base plate and a disk that continuously conveys the powder by rotation via a groove provided on the circumference of the disk and facing the powder delivery hole are included; and the disk, in a state in which part of a region where the groove is located is covered by the outer circular base plate of the powder accommodation container, is disposed so as to be slidably rotatable with respect to the outer circular base plate.
Disclosed is a cold spray gun and a cold spray apparatus using the same capable of stably heating a raw material powder to a specific high temperature with an achievement of compactness and lightweight of the apparatus. In order to achieve the above described object, there is provided a cold spray gun configured to form a coating film by spraying a raw material powder carried on a carrier gas from a nozzle outlet by a supersonic flow together with a working gas heated to a temperature equal to or lower than a melting point or a softening point of the raw material powder, and causing the raw material powder to collide with a base material in a solid state, the cold spray gun including; a chamber containing the working gas to be delivered to the nozzle; and is characterized in that a gas heating pipe constituted from a heating resistor which causes resistance heating by being energized is arranged in the chamber, and the working gas flowing into the interior of the gas heating pipe is heated.
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
B05B 7/16 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating the material to be sprayed
C23C 24/04 - Impact or kinetic deposition of particles
4.
COLD SPRAY GUN AND COLD SPRAY DEVICE EQUIPPED THEREWITH
The purpose of the present invention is to provide a cold spray gun and a cold spray device equipped therewith that can be operated with the working gas at a high temperature close to the melting or softening point of raw powder by effectively preventing clogging of a raw powder supply port. This purpose is achieved by a cold spray gun that forms a coating by ejecting a supersonic stream of raw powder, carried by a carrier gas, and a working gas heated to a temperature no higher than the melting point or softening point of the raw powder and colliding the raw powder with a substrate while still in a solid phase. The cold spray gun is characterized by being provided with: a chamber for storing the working gas; a cold spray nozzle forming a working gas flow path for turning the working gas discharged from the chamber into the supersonic stream at the exit thereof; a raw powder supply flow path for supplying the raw powder to the working gas discharged from the chamber; and a cooling means for cooling the raw powder supply flow path.
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
B05B 7/16 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating the material to be sprayed
C23C 24/04 - Impact or kinetic deposition of particles
5.
COLD SPRAY GUN AND COLD SPRAY DEVICE EQUIPPED THEREWITH
The purpose of the present invention is to provide a cold spray gun and a cold spray device equipped therewith that can be operated with the working gas at a high temperature close to the melting or softening point of raw powder by effectively preventing clogging of a raw powder supply port. This purpose is achieved by a cold spray gun that forms a coating by ejecting a supersonic stream of raw powder, carried by a carrier gas, and a working gas heated to a temperature no higher than the melting point or softening point of the raw powder and colliding the raw powder with a substrate while still in a solid phase. The cold spray gun is characterized by being provided with: a chamber for storing the working gas; a cold spray nozzle forming a working gas flow path for turning the working gas discharged from the chamber into the supersonic stream at the exit thereof; a raw powder supply flow path for supplying the raw powder to the working gas discharged from the chamber; and a cooling means for cooling the raw powder supply flow path.
C23C 24/04 - Impact or kinetic deposition of particles
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
B05B 7/16 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating the material to be sprayed
6.
COLD SPRAY GUN AND COLD SPRAY APPARATUS EQUIPPED WITH THE SAME
The purpose of the present invention is to provide a cold spray gun capable of stably heating a feedstock powder to a prescribed elevated temperature while allowing for a lighter and more compact device, and a cold spray apparatus equipped using the same. To achieve this purpose, the present invention provides a cold spray gun that sprays a feedstock powder, which is carried by a carrier gas, from a nozzle outlet at supersonic speed along with a working gas which has been heated to a temperature equal to or less than the melting point or softening point of the feedstock powder, impacting a substrate with the feedstock powder in solid phase to form a coating, the gun being characterized by comprising a chamber for containing the working gas delivered to the nozzle, a gas heating pipe constituted by a heat-generating resistor that generates resistive heat when electrified being disposed within the chamber, and the working gas being heated by flowing into the interior of the gas heating pipe.
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
C23C 24/04 - Impact or kinetic deposition of particles
7.
COLD SPRAY GUN AND COLD SPRAY APPARATUS EQUIPPED WITH SAME
The purpose of the present invention is to provide a cold spray gun capable of stably heating a feedstock powder to a prescribed elevated temperature while allowing for a lighter and more compact device, and a cold spray apparatus equipped using the same. To achieve this purpose, the present invention provides a cold spray gun that sprays a feedstock powder, which is carried by a carrier gas, from a nozzle outlet at supersonic speed along with a working gas which has been heated to a temperature equal to or less than the melting point or softening point of the feedstock powder, impacting a substrate with the feedstock powder in solid phase to form a coating, the gun being characterized by comprising a chamber for containing the working gas delivered to the nozzle, a gas heating pipe constituted by a heat-generating resistor that generates resistive heat when electrified being disposed within the chamber, and the working gas being heated by flowing into the interior of the gas heating pipe.
C23C 24/04 - Impact or kinetic deposition of particles
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
8.
Cold-spray nozzle and cold-spray device using cold-spray nozzle
An object of the present invention is to provide a cold-spray nozzle that can be continuously used for a long time without causing clogging up of the nozzle compared to a conventional case to effectively obtain a high-quality film by a cold-spray method. To achieve the object, the cold-spray nozzle that is a convergent-divergent type cold-spray nozzle comprising a convergent part, a throat part, and a divergent part sequentially arranged in this order for constituting a working gas flow path along a working gas flow direction from an inlet side to an outlet side is employed. The inner peripheral surface of the divergent part has a conical shape and at least a part of the inner peripheral surface is constituted by a glass material.
B05B 1/26 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectorsBreaking-up the discharged liquid or other fluent material by impinging jets
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
B05B 1/00 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
B05B 1/02 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops
B05B 7/16 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating the material to be sprayed
B05B 7/04 - Spray pistolsApparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
C23C 24/04 - Impact or kinetic deposition of particles
An improved cold spray gun apparatus and system, which prevents nozzle clogging and erosion of the nozzle material. The nozzle can be configured as a non- monolithic assembly that includes a passageway for spraying powder material. The passageway can include a converging section and a diverging section. Such an arrangement is, in part, a result of a selection of specific nozzle material for the diverging section and a cooling system. The improved cold spray gun enables applying coatings at high spray parameters (e.g., pressure up to 5 MPa, temperature up to and in excess of 1000°C), and can achieve high quality coatings, deposition efficiency, density, adhesion and cohesion, and other advantages. Additionally, the disclosed apparatus makes it possible to spray a wide range of powder materials in commercial applications without nozzle clogging or nozzle erosion during continuous operation.
In order to efficiently obtain a high-quality film by cold spraying, the objective of the present invention is to provide a nozzle for cold spray allowing for greatly improved long-term sustained usage over the prior art, without the occurrence of nozzle clogging. To achieve the objective, there is used a convergent-divergent nozzle for cold spray having a working gas flow channel configured by communicatingly disposing a convergent part, a throat part, and a divergent part, in this order, along the direction in which a working gas flows from an inflow side to an outflow side, the nozzle for cold spray being characterized in that the divergent part has an inner-wall surface having a conic shape, at least a part of the inner-wall surface being constituted of a glass material.
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
C23C 24/04 - Impact or kinetic deposition of particles
11.
NOZZLE FOR COLD SPRAY, AND COLD SPRAY DEVICE USING NOZZLE FOR COLD SPRAY
In order to efficiently obtain a high-quality film by cold spraying, the objective of the present invention is to provide a nozzle for cold spray allowing for greatly improved long-term sustained usage over the prior art, without the occurrence of nozzle clogging. To achieve the objective, there is used a convergent-divergent nozzle for cold spray having a working gas flow channel configured by communicatingly disposing a convergent part, a throat part, and a divergent part, in this order, along the direction in which a working gas flows from an inflow side to an outflow side, the nozzle for cold spray being characterized in that the divergent part has an inner-wall surface having a conic shape, at least a part of the inner-wall surface being constituted of a glass material.
C23C 24/04 - Impact or kinetic deposition of particles
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
Disclosed is a cold spray device which can heat a powdered source material up to a temperature that stably improves the spray efficiency of the powdered source material and eliminates unstable elements, without impairing the operability of a cold spray gun. The carrier gas heater of the cold spray apparatus is constituted of a gas tube having a heating function, the gas tube further constituted of a heating resistor for generating electric resistance heat by electric current flow for heating of the carrier gas introduced therein. The gas tube having the heating function is constituted of a plurality of gas tube units arranged in series, wherein one gas tube unit is comprised of a heating resistor of a current flow path length of 1m-5m. The carrier gas heater is integrally affixed to the cold spray gun such that the center axis of the coiled gas tube units is parallel to the center axis of the cold spray gun, thereby improving operability.
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
C23C 24/04 - Impact or kinetic deposition of particles
13.
Nozzle for cold spray system and cold spray device using the nozzle for cold spray system
The object of the present invention is to provide a cold spray method in which spray efficiency is improved by using a device comprising a similar construction to the conventional ones with minor change in conditions. The cold spray method employs the nozzle for cold spray system which comprises a convergent shape part, a throat part and a conical divergent shape part widened forward from the throat part used for making the raw material powder introduce from an inlet of the nozzle, which is located in the convergent shape part, into and shoot as a supersonic flow by using a working gas having temperature equal to or lower than a melting point of the raw material powder from a spout provided at the tip of the divergent shape part, wherein the convergent shape part is composed of a preheating region and a convergent region.
B05B 1/24 - Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means incorporating means for heating the liquid or other fluent material, e.g. electrically
A nozzle for cold spray and a cold spray device which can drastically reduce adhesion of material powder to the inner wall of the nozzle for cold spray and clogging of the nozzle. The nozzle for cold spray includes a tapered conical compression portion and a forward-broadening conical expansion portion communicating with the compression portion, the material powder being allowed to flow in from the nozzle inlet of the compression portion by using a working gas having a temperature up to the melting point of the material powder and to spout out as a supersonic stream from the nozzle outlet at the tip of the expansion portion, characterized in that at least the inner circumferential wall surface of the expansion portion is formed of glassy carbon.
C23C 24/04 - Impact or kinetic deposition of particles
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
15.
NOZZLE FOR COLD SPRAY, AND COLD SPRAY DEVICE USING THE NOZZLE FOR COLD SPRAY
This invention provides a method for improving spraying efficiency without any significant change in conditions using a cold spray device having the same construction as in the prior art. A nozzle characterized by comprising a compression part having a nozzle inlet-side preheating region and a compression region is adopted as a nozzle for cold spray, which comprises a compression part, a throat part, and a conical expansion part widen forward from the throat part and in which a raw material powder is allowed to flow using a working gas having a melting point below the melting point of the raw material powder through a nozzle inlet in the compression part and is jetted as a supersonic flow from the nozzle outlet at the front end of the expansion part.
C23C 24/04 - Impact or kinetic deposition of particles
B05B 7/16 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating the material to be sprayed
A nozzle for cold spray and cold spray apparatus that ensure substantial reductions of adhesion of raw material powder to the part of internal wall of the cold spray nozzle and clogging of the cold spray nozzle. The nozzle for cold spray is one having a tapered conical compression section and, provided in communication therewith, a spatulate conical expansion section so as to allow a raw material powder to flow inward through a nozzle inlet of the compression section by the use of a working gas of temperature not higher than the melting of the raw material powder and allow the same to spout as an ultrasonic stream from a nozzle outlet of the distal end of the expansion section, characterized in that the expansion section has at least its inner circumferential wall surface formed of either a fluororesin or a polyimide resin material, or of a composite resin material thereof.
C23C 24/04 - Impact or kinetic deposition of particles
B05B 7/16 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating the material to be sprayed
A nozzle for cold spray and cold spray device that realize substantial reductions of the adhesion of raw material powder to an internal wall part of cold spray nozzle and clogging of cold spray nozzle. The nozzle for cold spray is, for example, one including a tapered conical compression part and, communicating therewith, a spatulate conical expansion part, adapted to realize inflow of a raw material powder through a nozzle inlet of the compression part by the use of operating gas of temperature not higher than the melting point of the raw material powder and realize emission of a supersonic jet from a nozzle outlet provided at the distal end of the expansion part, characterized in that the expansion part at at least its inner circumferential wall surface consists of a ceramic material selected from among silicon nitride ceramic, zirconia ceramic and silicon carbide ceramic.
C23C 24/04 - Impact or kinetic deposition of particles
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
A nozzle for cold spray that attains marked reductions of adhesion of raw material powder to nozzle during operation and nozzle clogging attributed to the adhesion and thus attains prolongation of nozzle operating life; and a cold spray apparatus utilizing the nozzle. The nozzle for cold spray is one having a tapering conic compression part and, communicating therewith, a conic expansion part gradually widening toward a distal end so that a raw material powder is caused by the use of working gas of temperature not above the melting point or softening point thereof to flow in through a nozzle inlet of the compression part and jetted as a supersonic stream from a nozzle outlet of the distal end of the expansion part, characterized in that at least the expansion part is formed of glass.
B05B 7/14 - Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
patents
