CN208771790U - A kind of spray gun - Google Patents
A kind of spray gun Download PDFInfo
- Publication number
- CN208771790U CN208771790U CN201820843512.8U CN201820843512U CN208771790U CN 208771790 U CN208771790 U CN 208771790U CN 201820843512 U CN201820843512 U CN 201820843512U CN 208771790 U CN208771790 U CN 208771790U
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- spraying
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- 239000007921 spray Substances 0.000 title claims abstract description 101
- 239000000463 material Substances 0.000 claims abstract description 151
- 238000005507 spraying Methods 0.000 claims abstract description 124
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 238000002844 melting Methods 0.000 claims abstract description 17
- 230000008018 melting Effects 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims description 36
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 238000001816 cooling Methods 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 15
- 230000000694 effects Effects 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 6
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- 239000000112 cooling gas Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 7
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- 238000010288 cold spraying Methods 0.000 description 5
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- 230000003247 decreasing effect Effects 0.000 description 4
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- 229910052751 metal Inorganic materials 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 3
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- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
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- 238000007751 thermal spraying Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 229910052725 zinc Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a kind of spray gun, including ejection section, mixing jetting chamber is provided in ejection section, the solid-state sprayed on material for outside pulverized powder shape；Sprayed on material channel is provided in ejection section, sprayed on material channel is connected to mixing jetting chamber, and when spraying into the sprayed on material of molten or semi-molten shape to mixing jetting chamber by sprayed on material channel, eddy airstream can be formed in mixing jetting chamber, so that the sprayed on material of molten or semi-molten shape becomes powdered solid-state sprayed on material.Using this spray gun, it can use the eddy airstream formed in mixing jetting chamber, no longer limit the original state of material, it is only necessary to become melting or semi-molten state, it is very easy to use.Meanwhile eddy airstream can enable the sprayed on material of melting or semi-molten state to be sufficiently atomized in mixing jetting chamber, form particle size relatively consistent powdered solid-state sprayed on material, keep preferable spraying effect.
Description
Technical Field
The utility model relates to a spraying technical field especially relates to a spray gun.
Background
In order to attach a substance to the surface of the product, for example, an electrically conductive layer, an oxidation-resistant layer, an abrasion-resistant layer, etc., various methods may be used. For example, by plating, spraying, etc. Spraying is a common surface covering technique that can be divided into thermal spraying and cold spraying.
Thermal spraying is a processing method which uses gas, liquid fuel or electric arc, plasma arc, laser and the like as a heat source, heats powdered or filamentous metal, alloy, ceramic, oxide, carbide, plastic, nylon and composite materials thereof to a molten or semi-molten state, atomizes the powdered or filamentous metal, alloy, ceramic, oxide, carbide, plastic, nylon and composite materials thereof by the power of the heat source or by externally adding high-speed airflow, and sprays the atomized.
The cold spraying is to make a powdery spraying material impact the surface of a workpiece at a high speed (generally at a speed of 500-700 m/s) without processing the spraying material to a semi-molten or molten state, and after the spraying material with certain plasticity collides with the surface of the workpiece, solid particles passing through the spraying material are deposited on the surface of the workpiece through plastic deformation to form a coating. At present, cold spraying is only suitable for directly spraying powdery spraying materials, but not suitable for rod-shaped or filiform spraying materials, and the application range of the cold spraying technology is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a spray gun can change the spraying material of melting form or half melting form into solid-state spraying material and carry out the spraying, convenient to use.
To achieve the purpose, the utility model adopts the following technical proposal:
a spray gun comprises a spraying part, wherein a mixed spraying cavity is arranged in the spraying part and is used for spraying powdery solid spraying materials outwards;
the spraying part is provided with a spraying material channel which is communicated with the mixed spraying cavity, and when the spraying material in a molten or semi-molten state is sprayed into the mixed spraying cavity through the spraying material channel, vortex airflow can be formed in the mixed spraying cavity, so that the molten or semi-molten spraying material is changed into a powdery solid spraying material.
Wherein the injection part is provided with a cooling air flow hole for forming a cooling air flow at the periphery of an injection area where the powdery solid spray material is injected.
Wherein the cooling air flow is such that the sprayed solid spray material does not exceed a temperature of 80 ℃ when it reaches the surface of the component to be sprayed.
The spray gun also comprises a melting part used for melting the spraying material into a molten state or a semi-molten state, and the melting part is communicated with the spraying part.
The spray gun also comprises a feeding part for the spraying material in an initial state to enter, and the melting part is respectively connected with the feeding part and the spraying part.
Wherein, each spraying material passageway is the annular equipartition setting, and the spraying material passageway inclines along same direction of rotation.
Wherein, the injection part is provided with a power gas channel.
Wherein, the power gas channel is arranged in the area surrounded by the annularly arranged spraying material channel.
Has the advantages that: the utility model discloses a spray gun, which comprises a spraying part, wherein a mixed spraying cavity is arranged in the spraying part and is used for spraying powdery solid spraying materials outwards; the spraying part is provided with a spraying material channel which is communicated with the mixed spraying cavity, and when the spraying material in a molten or semi-molten state is sprayed into the mixed spraying cavity through the spraying material channel, vortex airflow can be formed in the mixed spraying cavity, so that the molten or semi-molten spraying material is changed into a powdery solid spraying material. By utilizing the spray gun, the spraying material in a molten or semi-molten state can be directly processed by utilizing vortex air flow formed in the mixed spraying cavity, so that the spraying material is changed into a powdery solid spraying material, and the solid spraying material is sprayed on the surface of a part to be sprayed, the initial state of the material is not limited, and only the material is required to be changed into a molten or semi-molten state, so that the spray gun is very convenient to use. Meanwhile, the vortex air flow can ensure that the spraying material in a molten or semi-molten state can be fully atomized in the mixed spraying cavity to form powdery solid spraying material with the particle size close to the same, and a better spraying effect is kept.
Drawings
Fig. 1 is a schematic structural diagram of a spray gun provided by the utility model during spraying.
Fig. 2 is a schematic view of the internal structure of the injection part of the spray gun according to the present invention.
Fig. 3 is a plan view of the ejection part of fig. 2.
Fig. 4 is a bottom view of the ejection part of fig. 2.
Fig. 5 is a schematic diagram of the connection of the components of the spraying device provided by the present invention.
Wherein,
1-spray gun, 11-feed section, 12-spray section, 121-mixed spray chamber, 122-cooling gas flow hole, 123-motive gas channel, 124-spray material channel, 1241-spray material channel inlet, 1242-spray material channel outlet, 13-melting section, 14-motive gas connecting pipe, 15-cooling gas connecting pipe, 2-part to be sprayed, 31-initial state spray material, 32-solid spray material, 33-cooling gas control system, 34-cooling gas, 35-motive gas control system, 36-filter, 37-gas storage tank, 38-oil water separator, 39-air compressor, 4-coating.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The utility model provides a spraying method, concrete step includes:
as shown in fig. 1, a powdery solid spray material 12 is sprayed at a predetermined speed toward a predetermined area by a spray gun 1 to deposit a solid spray material 32 on the surface of a member to be sprayed 2 to form a coating layer 4;
as shown in fig. 2, a mixing injection chamber 121 is provided in the injection part 12 of the spray gun 1, and in order to form the solid spray material 32, the spraying method of the present embodiment injects the spray material in a molten or semi-molten state into the mixing injection chamber 121, and forms a swirling air flow in the mixing injection chamber 121 so that the spray material in a molten or semi-molten state becomes a solid spray material in a powder form.
Taking fig. 2 as an example, when the spray material in a molten or semi-molten state is injected into the mixing injection chamber 121 along the spray material passage 124, a swirling air flow is formed in the mixing injection chamber 121, and the swirling air flow may be formed by the spray material injected into the mixing injection chamber 121 or other air flows. In summary, by using the swirling air flow formed in the mixing injection chamber 121, it is possible to directly process the spray material in a molten or semi-molten state, turn it into the solid spray material 32 in a powder state, and spray the solid spray material 32 onto the surface of the member to be sprayed. The spraying method is to make the spraying material deposit on the surface of the part to be sprayed, namely, the particles of the sprayed solid spraying material 32 form plastic deformation deposition in a manner similar to cold spraying, and the formed coating 4 after spraying is very dense and can be firmly combined with the surface of the part to be sprayed 2. The spraying method does not limit the initial state of the material any more, only needs to change the material into a molten or semi-molten state, and is very convenient to use. Meanwhile, the vortex air flow can ensure that the spraying material in a molten or semi-molten state can be fully atomized in the mixed spraying cavity to form powdery solid spraying material 32 with relatively close and consistent particle size, and a better spraying effect is kept. The spray material in the molten or semi-molten state is sufficiently contacted with the swirling air flow, and then is ground into spherical particles, which is favorable for being attached to the surface of the part 2 to be sprayed during spraying.
In order to increase the atomization of the spray material in the molten or semi-molten state, to form a better solid spray material 32, and to increase the spray velocity of the solid spray material 32, a motive gas may be injected into the mixing and injection chamber 121, and the motive gas may be injected into the mixing and injection chamber 121 from the region enclosed by the annularly arranged spray material passage outlets 1242 to atomize and accelerate the enclosed spray material from the center.
In the spraying method of this embodiment, the spraying material 31 in the initial state (before being heated to the molten or semi-molten state) may be heated to the molten or semi-molten state, and then sprayed into the mixing and spraying chamber 121. The spray material 31 in the initial state may be in the form of a rod, a wire or a powder, which does not limit the kind of the spray material 31 in the initial state to the powder material, and greatly widens the selection of the spray material. For example, metal, alloy, plastic, ceramic, composite material, pure metal (zinc, aluminum, copper, iron, nickel, titanium, stainless steel, etc.), metal alloy (phosphor bronze, tin bronze, lead bronze, etc.), plastic, composite material, etc. can be adopted, and NICR-based high-temperature alloy, etc. can be prepared to form coatings with different properties such as wear resistance, corrosion resistance, heat resistance, radiation resistance, electromagnetic shielding, etc.
With the above spraying method, the spraying material 31 in the initial state (before being heated to the molten state or the semi-molten state) is heated to the molten state or the semi-molten state, and then is sprayed into the mixing and spraying cavity 121 to form the powdery solid spraying material 32, and then the solid spraying material 32 is sprayed and deposited on the surface to be sprayed. Such a Spray coating method may be referred to as cold melt Spray (CHS).
The temperature for heating the spray material to a molten or semi-molten state may be 900 to 3000 ℃, and the specific temperature may be selected according to the characteristics of the material.
The spraying method of the embodiment further includes forming a cooling air flow at the periphery of the spraying area where the solid spraying material is sprayed so that the temperature of the sprayed spraying material does not exceed 100 ℃ when reaching the surface of the member to be sprayed. During the process of spraying the solid spray material 32 onto the surface of the part 2 to be sprayed, the sprayed spray material is cooled by the cooling gas flow formed by the cooling gas 34, so that the temperature of the sprayed spray material 32 is continuously reduced during the spraying process, and finally, when the temperature reaches the surface of the part 2 to be sprayed, the temperature can be reduced to 100 ℃ or below. The spraying method can avoid the deformation caused by high temperature for the base materials which are easy to deform at the temperature of more than 100 ℃, such as thin mobile phone shells, glass, plastic cement, ceramics, cloth, paper, wood, leather and the like, and is very convenient to spray the base materials. Of course, the temperature of the sprayed coating material 32 reaching the surface of the member to be coated can be adjusted by the magnitude and temperature of the cooling air flow, for example, when the flow rate of the cooling air flow is increased and the temperature of the cooling air flow is decreased, the temperature of the coating material can be decreased. The temperature of the sprayed coating material 32 reaching the surface of the member to be coated can be adjusted according to the actual situation, for example, to 25 to 42 ℃, for example, to 20 ℃, 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, etc.
The cooling air flow also reduces the temperature of the spray gun and, in addition, pre-cleans the surface of the product to be sprayed to remove impurities from the surface of the product to be sprayed.
In order to enable the spray material to be firmly bonded to the surface of the member 2 to be sprayed in a deposited manner, the predetermined speed of spraying the spray material is preferably not less than 400m/s, and may be more than 500m/s, 533m/s, 700m/s or more in order to obtain a good spraying effect.
The cooling gas flow formed by the cooling gas 34 mainly cools the sprayed spray material 32. The cooling gas 34 may be made of compressed air, or may be mainly made of an inert gas, such as helium or neon, which is chemically inert, so as to reduce contact between the sprayed coating material 32 and the outside air, thereby reducing oxidation of the coating material during spraying.
As shown in fig. 1 to 4, in order to implement the above spraying method, the present invention further provides a spray gun, which comprises a feeding portion 11 and a spraying portion 12. The feeding part 11 is used for the spraying material 31 in the initial state to enter, the spraying part 12 is communicated with the feeding part 11, and the mixed spraying cavity 121 is arranged in the spraying part 12 and used for spraying the powdery solid spraying material outwards. The injection part 12 is provided with a spray material passage 124, the spray material passage 124 communicates with the mixing injection chamber 121, and when a spray material in a molten or semi-molten state is injected into the mixing injection chamber 121 through the spray material passage 124, a swirling air flow is formed in the mixing injection chamber 121 so that the spray material in a molten or semi-molten state becomes a solid spray material in a powder state.
The initial state of the material is not limited by the spray gun, and the material only needs to be changed into a molten or semi-molten state, so that the use is very convenient. Meanwhile, the vortex air flow can enable the spraying material in a molten or semi-molten state to be fully atomized in the mixed spraying cavity 121, so that the powdery solid spraying material 32 with relatively close and consistent particle size is formed, and a better spraying effect is kept. The spray material in the molten or semi-molten state is sufficiently contacted with the swirling air flow, and then is ground into spherical particles, which is favorable for being attached to the surface of the part 2 to be sprayed during spraying. The materials sprayed by the spray gun can be referred to the materials in the above spraying method, and the details are not repeated here.
As shown in fig. 2 and 3, in order to form the swirling air flow in the mixing injection chamber 121 1, a plurality of spraying material passages 124 may be annularly arranged, and the spraying material passages 124 are inclined in the same rotational direction, so that the spraying material in a molten or semi-molten state is obliquely injected into the mixing injection chamber 121 in the same rotational direction, forming the swirling air flow.
The injection part 12 of the spray gun 1 may be provided with a motive gas channel 123 for injecting a motive gas into the mixing and injecting chamber 121 to increase the degree of atomization of the spray material in a molten or semi-molten state, to form a preferred solid spray material 32, and to increase the injection rate of the solid spray material 32. The motive gas channel 123 can be located in the region enclosed by the annularly arranged spray material channel outlets 1242, i.e. the annularly arranged spray material channels 124, so that the motive gas atomizes and accelerates the enclosed spray material from the middle.
The ejection portion 12 is provided with a cooling air flow hole 122 for forming a cooling air flow (an area where the cooling air 34 is formed in the drawing) at the periphery of the ejection area where the powdery solid spray material 12 is ejected so that the temperature of the ejected solid spray material 12 does not exceed 80 ℃ when it reaches the surface of the member to be sprayed 2. The spraying effect formed by the spray gun can avoid the deformation caused by higher temperature for the base materials which are easy to deform at the temperature of more than 100 ℃, such as thin mobile phone shells and the like, and the base materials can be conveniently sprayed. Of course, the temperature of the sprayed coating material 32 reaching the surface of the member to be coated can be adjusted by the magnitude and temperature of the cooling air flow, for example, when the flow rate of the cooling air flow is increased and the temperature of the cooling air flow is decreased, the temperature of the coating material can be decreased. The temperature of the sprayed coating material 32 reaching the surface of the member to be coated can be adjusted according to the actual situation, and is set to 20 ℃, 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃ or the like, for example.
The spray gun 1 further includes a melting portion 13 for melting the spray material in a molten or semi-molten state, and the melting portion 13 communicates with the feeding portion 11 and the injection portion 12, respectively. The heating method of the melting portion 13 is not limited, and various methods such as arc and flame can be used. The heating temperature can be set to 900-3000 ℃, and the specific temperature can be selected according to the characteristics of the material.
As shown in fig. 5, the spray gun 1 is connected to a motive gas control system 35 and a cooling gas control system 33, respectively, and the flow rate of the motive gas is controlled by the motive gas control system 35 to control the speed at which the spray gun 1 sprays the spray material, and the flow rate of the cooling gas is controlled by the cooling gas control system 33 to control the temperature at which the spray material reaches the surface of the member to be sprayed 2. Further, the cooling gas control system 33 can also control the temperature of the cooling system, controlling the temperature of the spray material when it reaches the surface of the part to be sprayed 2. Specifically, the flow rates of the motive gas and the cooling gas may be controlled by controlling the opening and closing or opening of the valve body, and the temperature of the motive gas and the temperature of the cooling gas may be controlled by the cooling devices provided in the respective cooling gas control system 34 and the motive gas control system.
In addition, since the motive gas is directly mixed with the spraying material, in order to reduce the influence of the motive gas on the spraying material, the motive gas control system may be sequentially connected to the filter 36, the gas tank 37, the oil-water separator 38, the air compressor 39, and the like, so as to remove impurities such as water vapor and fine dust in the motive gas as much as possible.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (8)
1. A spray gun, characterized by comprising a spray part (12), wherein a mixed spray cavity (121) is arranged in the spray part (12) and is used for spraying powdery solid spraying material outwards;
the spraying part (12) is provided with a spraying material channel (124), the spraying material channel (124) is communicated with the mixing and spraying cavity (121), and when the spraying material in a molten or semi-molten state is sprayed into the mixing and spraying cavity (121) through the spraying material channel (124), a vortex air flow can be formed in the mixing and spraying cavity (121) so that the spraying material in the molten or semi-molten state becomes a powdery solid spraying material.
2. A spray gun according to claim 1, characterized in that the injection part (12) is provided with cooling air flow holes (122) for forming a cooling air flow at the periphery of the injection area where the powdery solid coating material is injected.
3. A spray gun according to claim 2, characterized in that the cooling air flow is such that the sprayed solid spray material, when it reaches the surface of the component (2) to be sprayed, does not exceed a temperature of 80 ℃.
4. A spray gun according to claim 1, further comprising a melting section (13) for melting the spray material in a molten or semi-molten state, said melting section (13) communicating with said injection section (12).
5. A spray gun according to claim 4, characterized in that it further comprises a feed portion (11) for the entry of the spray material (31) in an initial state, said melting portion (13) being connected to said feed portion (11) and said injection portion (12), respectively.
6. A spray gun as claimed in any one of claims 1 to 5, characterized in that each of said coating material channels (124) is arranged in an annular arrangement, and said coating material channels (124) are inclined in the same direction of rotation.
7. A lance as claimed in claim 6, wherein the injection part (12) is provided with a motive gas passage (123).
8. A spray gun as claimed in claim 7, characterized in that the motive gas channel (123) is located in the region enclosed by the annularly arranged coating material channels (124).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820843512.8U CN208771790U (en) | 2018-06-01 | 2018-06-01 | A kind of spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820843512.8U CN208771790U (en) | 2018-06-01 | 2018-06-01 | A kind of spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208771790U true CN208771790U (en) | 2019-04-23 |
Family
ID=66148782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820843512.8U Expired - Fee Related CN208771790U (en) | 2018-06-01 | 2018-06-01 | A kind of spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208771790U (en) |
-
2018
- 2018-06-01 CN CN201820843512.8U patent/CN208771790U/en not_active Expired - Fee Related
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