CN115069467A - Liquid metal spraying device and spraying method thereof - Google Patents
Liquid metal spraying device and spraying method thereof Download PDFInfo
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- CN115069467A CN115069467A CN202210846075.6A CN202210846075A CN115069467A CN 115069467 A CN115069467 A CN 115069467A CN 202210846075 A CN202210846075 A CN 202210846075A CN 115069467 A CN115069467 A CN 115069467A
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- spray
- inner space
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- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 112
- 238000005507 spraying Methods 0.000 title claims abstract description 83
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 239000007921 spray Substances 0.000 claims abstract description 29
- 238000005260 corrosion Methods 0.000 claims abstract description 23
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- 230000017525 heat dissipation Effects 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000010304 firing Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000013473 artificial intelligence Methods 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000007770 graphite material Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000000376 reactant Substances 0.000 abstract description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 13
- 229910052733 gallium Inorganic materials 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000010587 phase diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
Landscapes
- Coating By Spraying Or Casting (AREA)
- Spray Control Apparatus (AREA)
- Nozzles (AREA)
Abstract
A liquid metal spraying device and a spraying method thereof are provided, wherein the liquid metal spraying device comprises a spray head unit and a control unit. The spray head unit comprises a bearing part with an inner space, a container, a piezoelectric valve, a firing pin driven by the piezoelectric valve and a spray nozzle extending downwards from the bearing part. The control unit comprises a pressure source for supplying pressure to the container, a power supply source for supplying power to the piezoelectric valve, and a monitoring module for monitoring the pressure source and the power supply source. The spraying method is that the liquid metal in the inner space is sprayed to a heating surface or a heat conducting surface through the nozzle by the spray head unit, so that the liquid metal is coated into a heat dissipation layer. Corrosion by liquid metal is avoided by the corrosion resistance of the inner space of the adapter and the inner surface of the nozzle, preventing corrosion or reactants from clogging the nozzle.
Description
Technical Field
The present invention relates to a spraying apparatus and a spraying method, and more particularly to a spraying apparatus for liquid metal and a method for spraying liquid metal onto a heating surface or a heat-conducting surface.
Background
The liquid metal is a low-melting-point alloy which is liquid at normal temperature and has fluidity, has the advantages of stable property, difficult volatilization, safety, no toxicity and the like, and the atomic structure of the liquid metal is more similar to that of crystalline liquid than that of common solid metal, so that the liquid metal has higher heat conduction capacity and specific heat capacity, even higher than that of the traditional Silicone Grease (Silicone Grease) heat-conducting paste, and therefore, the liquid metal can be applied to the field of heat conduction. The gallium-based liquid alloy is one of common liquid metals, the composition of the gallium-based liquid alloy is gallium-indium-tin alloy, gallium accounts for more than half of the gallium, gallium is light blue metal, the melting point of the gallium is very low, the boiling point of the gallium is very high, the gallium is changed into silvery-white liquid at 29.76 ℃, the liquid gallium has the obvious supercooling tendency, the gallium is easily cooled to 0 ℃ and is not solidified, the characteristic enables the gallium to be very suitable for being used as liquid metal for cooling and heat conduction, and the stability of the gallium-based liquid alloy is superior to that of heat conduction silica gel which is easy to age and dry.
Referring to fig. 1 and 2, since the gallium metal in the liquid metal is easy to react with the metal material (copper or aluminum, etc.), a New Alloy (New Alloy) as shown in fig. 1 and 2 is generated, the New Alloy is shaped like a needle-shaped compound, and is easy to accumulate along the edge of the metal tube, and after a period of use, the New Alloy blocks the channel through which the liquid metal flows, thereby affecting the quantitative outflow of the liquid metal, and causing deviation in mass production operation.
Furthermore, if the heat generating components such as CPU, GPU or heat sink are coated with the liquid metal before shipping, the liquid metal needs to be uniformly coated on the heat conducting surface or the heat generating surface of the target object in a very short time in order to match with the fast automatic process, so it is a long-standing problem in the art to overcome the cohesion and uniformly coat the liquid metal in a very short time. At present, the common mode of coating the liquid metal is to manually brush the liquid metal on a heating surface or a heat conducting surface, the liquid metal needs to be extruded and smeared back and forth by applying force in the brushing process, but the method is labor-consuming and time-consuming, and is easily affected by the skills of the personnel and human factors to cause the unstable coating quality, which causes the liquid metal not to be uniformly coated on the heating surface or the heat conducting surface, the heat conducting efficiency is not good, the performance is affected, and the coating of the liquid metal is usually performed after the heating component is installed on the device, therefore, many electronic components or circuits are often distributed near the heating surface or the heat conducting surface, and if the liquid metal is coated by manual coating, it is easy to be interfered by other human factors or poor skills of people, thereby, the liquid metal is mistakenly coated on other electronic components or circuits, and the electronic components or circuits are damaged or have blocked functions.
Disclosure of Invention
The object of the present invention is to provide a liquid metal spraying device which overcomes the above-mentioned problems.
The invention relates to a liquid metal spraying device, which comprises a spray head unit and a control unit, wherein the spray head unit comprises a bearing piece, a container, a piezoelectric valve, a firing pin and a nozzle, wherein the bearing piece surrounds and defines an inner space, the container is used for containing liquid metal and is communicated with the bearing piece, the piezoelectric valve is arranged on the bearing piece, the firing pin is connected with the piezoelectric valve and can be driven by the piezoelectric valve, the nozzle extends downwards from the bearing piece, the inner space is upwards communicated with the container and is downwards communicated with the nozzle, the inner space and the inner surface of the nozzle have corrosion resistance, the control unit comprises a pressure source for providing pressure to the container, a power supply for supplying power to the piezoelectric valve, and a monitoring module for monitoring the pressure source and the power supply, the pressure source can send the liquid metal in the container into the inner space of the bearing piece after supplying pressure to the container, the power supply can drive the piezoelectric valve to drive the firing pin to push the liquid metal flowing into the inner space, and then the liquid metal is sprayed out of the nozzle.
Preferably, in the liquid metal spraying apparatus, the receiving member and the nozzle are made of corrosion-resistant materials.
Preferably, in the liquid metal spraying apparatus, the receiving member and the nozzle are made of stainless steel or ceramic material.
Preferably, in the liquid metal spraying apparatus, the inner space of the receiving member and the inner surface of the nozzle are coated with an anti-corrosion layer.
Preferably, the liquid metal spraying apparatus is further provided, wherein the corrosion-resistant layer is made of an isotropic material or an anisotropic material.
Preferably, in the liquid metal spraying apparatus, the anti-corrosion layer is made of nickel-plated metal, gold-plated metal, silver-plated metal or graphite material.
Preferably, in the liquid metal spraying apparatus, the container is made of a polymer material or a plastic material.
Preferably, the liquid metal spraying apparatus further includes a driving unit, and the driving unit includes a driving arm capable of driving the nozzle unit to move along three axial directions.
Preferably, the liquid metal spraying apparatus further includes a moving carrier located below the head unit and capable of moving in three axial directions relative to the head unit.
Preferably, in the liquid metal spraying apparatus, an aperture of the nozzle of the head unit is 0.05mm to 0.25 mm.
Preferably, the pressure source of the control unit provides a pressure of 0.15 Mpa.
Preferably, the liquid metal spraying apparatus further includes an image recognition unit disposed on the nozzle unit and connected to the control unit in signal form, the image recognition unit has an artificial intelligence recognition function and can determine whether the sprayed liquid metal is uniform and good, and the image recognition unit and the nozzle face the same direction.
Another object of the present invention is to provide a spraying method using the above liquid metal spraying apparatus.
The spraying method comprises a spraying step, wherein in the spraying step, a pressure source of the control unit supplies pressure to a container of the spray head unit to enable liquid metal in the container to enter an inner space of the receiving piece, and a power supply supplies power to the piezoelectric valve to drive the striker to push the liquid metal in the inner space so that the liquid metal is sprayed onto the heating surface or the heat conducting surface through the nozzle, and the spray head unit and the heating assembly move relatively to enable the liquid metal to be coated into a heat dissipation layer on the heating surface or the heat conducting surface.
Preferably, the spraying method further includes a shielding step, which is performed before the spraying step, in the shielding step, a shielding member surrounding a working opening is prepared, the shielding member covers the periphery of the heat generating component, and the heat generating surface or the heat conducting surface is exposed outwards through the working opening.
Preferably, in the spraying step, the liquid metal spraying apparatus further includes a driving unit, the driving unit includes a driving arm capable of driving the nozzle unit to move along three axial directions, and the nozzle unit is driven by the driving arm to move along three axial directions relative to the heating element and has an optical image automatic alignment function.
Preferably, in the shielding step, the heating element is placed on a moving carrier, and in the spraying step, the moving carrier drives the heating element to move along three axial directions relative to the nozzle unit and has an optical image automatic alignment function.
Preferably, the spraying method further includes a removing step, subsequent to the spraying step, in which the shade is removed from the periphery of the heat generating component.
The invention has the beneficial effects that: the liquid metal spraying device can protect the inner space of the adapting piece and the inner surface of the nozzle from being corroded by liquid metal through the corrosion resistance of the inner space of the adapting piece and the inner surface of the nozzle, and prevent rust or reactants from blocking the nozzle, so that the liquid metal output quantity of the nozzle is consistent under the same pressure. Meanwhile, the spraying method can spray liquid metal onto the heating surface or the heat conducting surface through pressure, thereby overcoming the cohesive force of the liquid metal, and the relative movement between the spray head unit and the heating component can be monitored through automatic control, thereby avoiding the interference of human factors, reducing the processing time, ensuring the correct size and uniform coating of the heat dissipation layer, enabling the heating surface or the heat conducting surface to exert the efficiency, avoiding the liquid metal from being sprayed to other places during spraying, ensuring that other electronic components or circuits are not influenced, and improving the quality stability of the processing.
Drawings
FIG. 1 is a crystal phase diagram illustrating the crystal phase diagram of a needle-like compound;
FIG. 2 is a crystal phase diagram illustrating a process of deposition of needle-like compounds;
FIG. 3 is a side sectional view illustrating an embodiment of the liquid metal spraying apparatus of the present invention, with only parts of the assembly being shown in section in FIG. 3;
FIG. 4 is a perspective view illustrating the perspective aspect of FIG. 3;
FIG. 5 is a flow chart illustrating one embodiment of a method of spraying the liquid metal spray coating device of the present invention;
FIG. 6 is a schematic view illustrating a masking step of the spraying method;
FIGS. 7 and 8 are perspective views illustrating a spraying step of the spraying method;
FIG. 9 is a perspective view illustrating a removal step of the spray coating method; and
fig. 10 is a perspective view illustrating another aspect of the liquid metal spraying apparatus.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 3 and 4, in an embodiment of the liquid metal spraying apparatus of the present invention, the liquid metal spraying apparatus 1 includes a nozzle unit 11, a control unit 12 connected to the nozzle unit 11, a driving unit 13, and an image recognition unit 14 disposed on the nozzle unit 11 and connected to the control unit 12 in signal. The nozzle unit 11 includes a receiving member 111, a receiving container 112 for receiving liquid metal and communicating with the receiving member 111, a piezoelectric valve 113 disposed on the receiving member 111, a nozzle 114 extending downward from the receiving member 111, and a striker 110 connected to the piezoelectric valve 113 and driven by the piezoelectric valve 113 to reciprocate up and down. The socket 111 surrounds and defines an inner space 115 upwardly communicating with the receiver 112 and downwardly communicating with the nozzle 114, the inner space 115 of the socket 111 and the inner surface of the nozzle 114 are corrosion resistant, which may be the socket 111 and the nozzle 114 directly made of corrosion resistant material, or alternatively, the inner space 115 of the socket 111 and the inner surface of the nozzle 114 are covered with a corrosion resistant layer 118, so as to protect the inner space 115 of the socket 111 and the inner surface of the nozzle 114 from corrosion by liquid metal, thereby preventing the inner space 115 and the nozzle 114 from being blocked by corrosion or reactive dirt, and ensuring consistent liquid metal output of the nozzle 114 under the same pressure. In the embodiment, the anti-corrosion layer 118 is made of an isotropic (isotropic) material (such as nickel-plated metal, gold-plated metal, silver-plated metal, e.g. nickel-palladium-gold) or an anisotropic (anistropic) material (such as graphite material), and the anti-corrosion material is a stainless steel material or a ceramic material; in addition, the container 112 is made of polymer material or plastic material, and the aperture of the nozzle 114 is preferably 0.05mm to 0.25 mm.
The control unit 12 includes a pressure source 121 for providing pressure to the container 112, a power supply 122 for supplying power to the piezoelectric valve 113, and a monitoring module 123 for monitoring the pressure source 121 and the power supply 122. After the pressure source 121 supplies pressure to the container 112, the liquid metal in the container 112 can be fed into the inner space 115 of the socket 111, and the pressure of the pressure source 121 is preferably 0.15 MPa. The power supply 122 may drive the piezoelectric valve 113, such that the piezoelectric valve 113 controls the striker 110 to move up and down to push the liquid metal flowing into the inner space 115, and thus to eject the liquid metal from the nozzle 114. The driving unit 13 is a driving arm 131 capable of driving the nozzle unit 11 to move in three axial directions, and has an automatic optical image alignment function. The lens or detector of the image recognition unit 14 is directed downward and is co-directional with the nozzle 114.
Referring to fig. 5 and 6, the spraying method of the liquid metal spraying apparatus 1 of the present invention is suitable for a heating element 2 having a heating surface 21 or a Heat conducting surface 22, and the heating element 2 may be an electronic component such as a CPU, a GPU, a Heat Sink (Heat Sink), or a Thermal module (Thermal module), but is not limited thereto. The spraying method includes a masking step 31, a spraying step 32, and a removing step 33. In the shielding step 31, a shielding member 4 surrounding and defining a working opening 41 is prepared, the shielding member 4 is covered on the periphery of the heat generating component 2, and the heat generating surface 21 or the heat conducting surface 22 is exposed to the outside through the working opening 41. Since the heat generating component 2 may be disposed on the motherboard a, the substrate, or in close proximity to other electronic components, or circuits, the heat generating surface 21 or other components outside the heat conducting surface 22 can be shielded by the shielding member 4.
Referring to fig. 5, 7, and 8, in the spraying step 32, the pressure source 121 (see fig. 3) is used to supply pressure to the container 112, so that the liquid metal in the container 112 enters the inner space 115 of the socket 111. The power supply 122 (see fig. 3) supplies power to the piezoelectric valve 113 to drive the striker 110 connected to the piezoelectric valve 113 to push the liquid metal in the inner space 115, so that the liquid metal is sprayed onto the heating surface 21 or the heat-conducting surface 22 through the nozzle 114. Then, the driving arm 131 drives the nozzle unit 11 to move relative to the heating element 2, so that the liquid metal is coated on the heating surface 21 or the heat conducting surface 22 to form a heat dissipation layer 5. Referring to fig. 5 and 9, in the removing step 33, the shielding member 4 is removed from the heating element 2 to complete the manufacturing process. It should be noted that the image recognition unit 14 has an artificial intelligence recognition function, and can analyze and recognize the pointed object by using an artificial intelligence internet of things (AIOT) image recognition technology, for example, whether the liquid metal sprayed from the nozzle 114 is coated with the heat dissipation layer 5 with a uniform thickness, whether the heat dissipation layer 5 has a break point, whether the liquid metal has a non-uniform thickness during the liquid metal spraying path operation, or whether the liquid metal is sprayed on the peripheral area of the heating element 2. And returning the identification result to the Internet of things (IOT) so that the manufacturer can master the yield in real time. The image recognition unit 14 can also transmit the result to the monitoring module 123 of the control unit 12, and compensate by a control technique, so that the heat dissipation layer 5 can maintain the required coating quality.
Referring to fig. 5 and 10, in the present embodiment, the driving unit 13 drives the driving arms 131 moving in three axial directions to automatically control and precisely move the nozzle 114 of the liquid metal spraying apparatus 1, so as to accurately control the coating range of the heat dissipation layer 5. In addition, the heating element 2 may be placed on a moving stage 132 in the shielding step 31, and in the spraying step 32, the moving stage 132 is controlled to drive the heating element 2 to move along three axial directions relative to the head unit 11 so as to form the heat dissipation layer 5, and the moving stage 132 has a function of automatic optical image alignment. Of course, the drive arm 131 and the movable stage 132 may be arranged at the same time, as long as the heat generating element 2 can be moved relative to the head unit 11. The shielding member 4 may be shaped like a plate as disclosed in this embodiment, and may also be matched with the heating element 2 or the electronic elements around the heating element to adjust the appearance, so as to achieve better covering and shielding effects. In addition, when the liquid metal is applied to the heat conducting surface 22 of the separately processed heat sink, the heat sink is not yet assembled to the circuit board, and thus there is no concern of splashing to other places, so the shielding step 31 and the removing step 33 can be omitted.
In summary, the present invention can save manpower and avoid human interference, improve coating accuracy and improve process quality stability by matching with automatic control, the pressure of the liquid metal spraying apparatus 1 can overcome the cohesion of the liquid metal to achieve uniform coating effect, the shielding member 4 can prevent the liquid metal from splashing or attaching to other places during spraying process to prevent the liquid metal from corroding or damaging other electronic components or circuits, the receiving member 111 and the nozzle 114 are directly made of corrosion-resistant materials, or an anti-corrosion layer 118 is additionally coated on the inner surface to prevent the liquid metal from corroding to generate needle-like compounds to prevent the inner space 115 and the nozzle 114 from being blocked, thereby maintaining the stability of liquid metal output, and indeed achieving the purpose of the present invention.
Claims (17)
1. A liquid metal spraying device which characterized in that: the liquid metal spraying device comprises a spray head unit and a control unit, wherein the spray head unit comprises a receiving piece, a container, a piezoelectric valve, a firing pin and a nozzle, the receiving piece surrounds and defines an inner space, the receiving piece is used for receiving liquid metal and is communicated with the receiving piece, the piezoelectric valve is arranged on the receiving piece, the firing pin is connected with the piezoelectric valve and can be driven by the piezoelectric valve, the nozzle extends downwards from the receiving piece, the inner space is upwards communicated with the container and is downwards communicated with the nozzle, the inner space and the inner surface of the nozzle have corrosion resistance, the control unit comprises a pressure source, a power supply and a monitoring module, the pressure source provides pressure for the container, the power supply provides power for the piezoelectric valve, the monitoring module monitors the pressure source and the power supply, and the pressure source can send the liquid metal in the container into the inner space of the receiving piece after the pressure source provides pressure for the container, the power supply can drive the piezoelectric valve to drive the firing pin to push the liquid metal flowing into the inner space, and then the liquid metal is sprayed out of the nozzle.
2. A liquid metal spray apparatus as claimed in claim 1, wherein: the adapter and the nozzle are made of corrosion-resistant materials.
3. A liquid metal spray apparatus as claimed in claim 2, wherein: the bearing piece and the nozzle are made of stainless steel materials or ceramic materials.
4. A liquid metal spray apparatus as claimed in claim 1, wherein: the inner space of the bearing piece and the inner surface of the nozzle are coated with anti-corrosion layers.
5. A liquid metal spraying apparatus as claimed in claim 4, wherein: the anti-corrosion layer is made of an isotropic material or an anisotropic material.
6. A liquid metal spraying apparatus as claimed in claim 4, wherein: the anti-corrosion layer is made of nickel-plated metal, gold-plated metal, silver-plated metal or graphite material.
7. A liquid metal spraying apparatus as claimed in claim 1, wherein: the container is made of high polymer materials or plastic materials.
8. A liquid metal spray apparatus as claimed in claim 1, wherein: the liquid metal spraying device further comprises a driving unit, and the driving unit comprises a driving arm which can drive the spray head unit to move along three axial directions.
9. A liquid metal spray apparatus as claimed in claim 1, wherein: the liquid metal spraying device also comprises a moving carrier which is positioned below the spray head unit and can move along three axial directions relative to the spray head unit.
10. A liquid metal spray apparatus as claimed in claim 1, wherein: the caliber of the nozzle of the spray head unit is 0.05 mm-0.25 mm.
11. A liquid metal spray apparatus as claimed in claim 1, wherein: the pressure provided by the pressure source of the control unit is 0.15 Mpa.
12. A liquid metal spray apparatus as claimed in claim 1, wherein: the liquid metal spraying device also comprises an image identification unit which is arranged on the spray head unit and is in signal connection with the control unit, the image identification unit has an artificial intelligence identification function and can judge whether the sprayed liquid metal is uniform and good, and the image identification unit and the spray nozzle face the same direction.
13. A spray coating method using the liquid metal spray coating device according to claim 1, applied to a heat generating component having a heat generating surface or a heat conductive surface, characterized in that: the spraying method comprises a spraying step, in the spraying step, pressure is supplied to a container of the spray head unit by a pressure source of the control unit, so that liquid metal in the container enters an inner space of the receiving piece, the power supply supplies power to the piezoelectric valve to drive the striker to push the liquid metal in the inner space, so that the liquid metal is sprayed onto the heating surface or the heat conducting surface through the nozzle, and the spray head unit and the heating assembly move relatively to coat the liquid metal on the heating surface or the heat conducting surface to form a heat dissipation layer.
14. The spray coating method according to claim 13, characterized in that: the spraying method further comprises a shielding step which is continued to the spraying step, wherein in the shielding step, a shielding piece which surrounds and defines a working opening is prepared, the shielding piece covers the periphery of the heating assembly, and the heating surface or the heat conduction surface is exposed outwards through the working opening.
15. The spray coating method according to claim 13, characterized in that: in the spraying step, the liquid metal spraying device further comprises a driving unit, the driving unit comprises a driving arm which can drive the nozzle unit to move along three axial directions, and the nozzle unit can be driven by the driving arm to move along three axial directions relative to the heating assembly and has an optical image automatic alignment function.
16. The spray coating method according to claim 14, characterized in that: in the shielding step, the heating component is placed on a movable carrying platform, and in the spraying step, the movable carrying platform drives the heating component to move along three axial directions relative to the spray head unit and has an automatic optical image alignment function.
17. The spray coating method according to claim 14, wherein: the spraying method further includes a removing step, subsequent to the spraying step, in which the shutter is removed from the periphery of the heat generating component.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW110133215A TWI786809B (en) | 2021-09-07 | 2021-09-07 | Liquid metal spraying device and spraying method thereof |
| TW110133215 | 2021-09-07 |
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| Publication Number | Publication Date |
|---|---|
| CN115069467A true CN115069467A (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210846075.6A Pending CN115069467A (en) | 2021-09-07 | 2022-07-05 | Liquid metal spraying device and spraying method thereof |
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| CN (1) | CN115069467A (en) |
| TW (1) | TWI786809B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115679238A (en) * | 2022-11-18 | 2023-02-03 | 湖南中材盛特新材料科技有限公司 | Liquid metal quantitative spraying device |
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Also Published As
| Publication number | Publication date |
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| TWI786809B (en) | 2022-12-11 |
| TW202310939A (en) | 2023-03-16 |
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