CN113199171A - Preparation method of solder paste for automobile control panel and homogenizing equipment thereof - Google Patents
Preparation method of solder paste for automobile control panel and homogenizing equipment thereof Download PDFInfo
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- CN113199171A CN113199171A CN202110415947.9A CN202110415947A CN113199171A CN 113199171 A CN113199171 A CN 113199171A CN 202110415947 A CN202110415947 A CN 202110415947A CN 113199171 A CN113199171 A CN 113199171A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
- B23K35/3613—Polymers, e.g. resins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention discloses a preparation method of solder paste for an automobile control panel and homogenizing equipment thereof, wherein the solder paste is prepared from the following components in percentage by mass: 15 of tin powder and flux paste; wherein, the tin powder comprises the following components: the solder paste comprises bismuth alloy solder powder, Sn-Ag-Cu series solder powder, nano titanium particles and graphene, wherein the solder paste comprises the following components: disproportionated rosin, a surfactant, an organic solvent, organic resin, zinc chloride and an anti-aging agent, wherein the homogenizing device comprises a tank body, a stirring mechanism and a spraying mechanism. According to the invention, graphene is added in a proper proportion, and the graphene and the solid solution titanium crystal interact with each other, so that the solid solution titanium preferentially reacts with oxygen, a thin and compact oxide film is formed at the liquid level of the molten solder instantaneously, the oxide film can effectively isolate external oxygen from entering the film, and can inhibit copper in the molten solder from being oxidized, thereby remarkably improving the oxidation resistance of the solder alloy.
Description
Technical Field
The invention relates to the technical field of solder paste, in particular to a preparation method of solder paste for an automobile control panel and homogenizing equipment thereof.
Background
The automobile control panel is also a circuit board, and the application range of the circuit board is not as wide as that of the circuit board, but is more intelligent and automatic than that of the common circuit board. In short, the circuit board capable of controlling is called a control board. The automatic production equipment of manufacturers and the toy remote control automobile for children are all internally provided with control panels.
When the automobile control panel is produced, the electronic components are initially adhered to the set position of the control panel by using the soldering paste, and the components to be welded and the printed circuit bonding pad are welded together to form permanent connection along with the volatilization of the solvent and part of the additives at the welding temperature.
The traditional tin-lead soldering paste can basically meet the requirements, but because a large amount of lead is contained in the paste, the paste can bring great harm to the living environment and safety of human beings after long-term use. Therefore, legislation that prohibits the use of lead and its compounds has been promulgated in the united states, the european union, etc., and national standards for lead-free solders have been developed in many countries, including our country. Compared with tin-lead soldering paste, the melting point of the lead-free SnAgCu series soldering paste is higher by about 34 ℃, which brings serious problems of high-temperature oxidation and the like in the soldering process, and provides more rigorous requirements for the soldering flux for the lead-free soldering paste, so that the traditional soldering flux is not adapted to the soldering flux.
Disclosure of Invention
The invention aims to provide a preparation method of solder paste for an automobile control panel and homogenizing equipment thereof so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of solder paste for an automobile control panel comprises the following steps:
the solder paste is prepared from the following components in percentage by mass of 85: 15 of tin powder and flux paste; wherein the tin powder comprises the following components in parts by weight: 5-8 parts of bismuth alloy soldering tin powder, 80-85 parts of Sn-Ag-Cu series soldering tin powder, 2-4 parts of nano titanium particles and 4-6 parts of graphene, wherein the soldering paste comprises the following components in parts by weight: 30-55 parts of disproportionated rosin, 8-10 parts of surfactant, 31-35 parts of organic solvent, 10-15 parts of organic resin, 5-7 parts of zinc chloride and 5-8 parts of anti-aging agent;
the preparation method of the soldering paste comprises the following steps;
s1: encapsulating the tin-bismuth alloy soldering tin powder, the Sn-Ag-Cu series soldering tin powder and the nano titanium particles in parts by weight in a vacuum quartz tube, and then filling high-purity nitrogen protective gas;
s2: putting the raw materials packaged in the step S1 into a reaction furnace for smelting and heat treatment to obtain completely molten liquid;
s3: placing graphene in a stirring ball mill, filling liquid nitrogen into the stirring ball mill until the liquid nitrogen completely submerges the grinding balls, performing ball milling, taking out powder subjected to ball milling, adding the powder into the melt obtained in the step S2, stirring, placing the mixture in an inert gas protection box, cooling to room temperature, and then placing the mixture in a mold for hot pressing and sintering to obtain solder alloy powder;
s4: adding the weighed organic resin, disproportionated rosin, zinc chloride and anti-aging agent into homogenizing equipment for 8-10 minutes, adding a surfactant into the homogenizing equipment, and continuously stirring for 3-4 minutes to obtain the soldering flux;
s5: and pouring the soldering flux obtained in the step S4 and the solder alloy powder obtained in the step S3 into a vacuum stirrer, and filling nitrogen to stir at a low speed to obtain the solder paste.
Preferably, in step S5, the mixture is poured into a vacuum mixer and stirred at a low speed for 12-18 minutes, and then nitrogen is filled into the vacuum mixer and stirred at a medium speed for 50-60 minutes.
Preferably, 5 parts of bismuth alloy soldering tin powder, 85 parts of Sn-Ag-Cu series soldering tin powder, 4 parts of nano titanium particles and 6 parts of graphene.
A homogenizing device adopted by a preparation method of solder paste for an automobile control panel comprises a tank body, a stirring mechanism and an injection mechanism, wherein a feed hopper communicated with the inside of the tank body is arranged on one side of the tank body, a discharge pipe penetrates through the central position of the bottom of the tank body, the bottom wall of the tank body of the discharge pipe is fixedly connected, discharge holes are uniformly arranged at the position of the discharge pipe at the bottom end of the inside of the tank body, and a valve is arranged on the discharge pipe at the bottom of the tank body;
the stirring mechanism comprises a driving part, a stirring part and a displacement part, wherein the driving part comprises a motor arranged at the middle position of the top of the tank body through a motor fixing seat and a driving shaft which is fixed at the output end of the motor and penetrates through the top wall of the tank body to extend into the tank body, and sliding strips are uniformly arranged on the outer side of the bottom end of the driving shaft along the circumferential direction; the stirring part comprises a rotating shaft which is coaxial with the driving shaft and is slidably connected to the bottom of the driving shaft, an L-shaped fixed rod which is uniformly arranged on the outer side of the top end of the rotating shaft along the circumferential direction, and a stirring plate which is obliquely arranged at the bottom end of the L-shaped fixed rod, wherein the top end of the rotating shaft is provided with a slot which is mutually matched with the driving shaft, a sliding chute which is mutually matched with the sliding strip is uniformly arranged on the rotating shaft on the outer side of the slot, the driving shaft is inserted into the slot, a reset spring is arranged between the bottom end of the driving shaft and the bottom end of the slot, the top end of the reset spring is fixedly connected with the driving shaft, the bottom end of the reset spring is fixedly connected with the bottom end of the slot, the stirring plate comprises a vertical part which is close to the side wall of the tank body and an arc part which is close to the center of the tank body, and the displacement part comprises four arc bulges which are uniformly arranged at the top of the tank body by taking the driving shaft as the center, a touch rod for abutting against the top of the L-shaped fixed rod below the arc bulges, The arc-shaped groove is arranged at the top of the abutting rod, and the rolling ball is clamped in the arc-shaped groove;
injection mechanism includes with row expects that the pipe is coaxial and rotate the setting at the ejection of compact section of thick bamboo at row expects the pipe top, from last to set up at the inside pressure chamber and the storage cavity of ejection of compact section of thick bamboo, slide and set up at the piston of pressure chamber inside and along the arc pipe of circumferencial direction even setting in the ejection of compact section of thick bamboo outside and with the storage cavity intercommunication, wherein, the arc pipe is kept away from the arc portion that the one end orientation of ejection of compact section of thick bamboo corresponds the agitator plate, ejection of compact section of thick bamboo border position department is provided with the dead lever along its circumferencial direction is even perpendicular, and the top of dead lever runs through the L type dead lever that corresponds, the bottom of drive shaft extends to pressure chamber and piston top fixed connection.
Preferably, the volume of the pressure chamber is greater than the volume of the reservoir chamber.
Preferably, the bottom of the tank body is uniformly provided with supporting columns, and the bottom ends of the supporting columns are provided with rubber pads.
Compared with the prior art, the invention has the beneficial effects that:
(1) in addition, graphene with a proper proportion is added, and the interaction between the graphene and a solid solution titanium crystal enables the solid solution titanium to preferentially react with oxygen, so that a thin and compact oxidation film is formed instantaneously on the liquid level of the molten solder, the oxidation film can effectively isolate external oxygen from entering the film, copper in the molten solder can be inhibited from being oxidized, and the oxidation resistance of the solder alloy is remarkably improved.
(2) When the driving shaft drives the rotating shaft to rotate, when the contact rod passes through the arc-shaped protruding position, the rotating shaft can be displaced downwards and the reset spring is stretched through the contact rod and the L-shaped fixed rod, and after the contact rod passes through the arc-shaped protruding position, the rotating shaft can move upwards under the action of the reset spring, namely the rotating shaft can be displaced upwards and downwards automatically when rotating, so that the effect of shaking the material up and down by the stirring plate is improved.
(3) When the rotating shaft moves up and down, the piston at the bottom end of the rotating shaft can be driven to move, materials in the tank body can be sucked into the material storage cavity through the arc-shaped pipe and then extruded out, in the process, the jet cylinder can rotate at the same speed with the rotating shaft through the fixed rod, the position between the arc-shaped pipe and the stirring plate cannot change, and when the stirring plate rotates, the materials move to the arc-shaped part along the vertical part of the stirring plate, the materials sprayed by the arc-shaped pipe can collide with the materials moving to the arc-shaped part along the vertical part of the stirring plate, so that the material particles are more homogenized, and the quality of the soldering paste is improved.
Drawings
FIG. 1 is a schematic view of a homogenizing apparatus according to the present invention;
FIG. 2 is a schematic view of the structure of the plane A-A of FIG. 1;
FIG. 3 is a schematic view of the structure B-B of FIG. 1.
In the figure: 1. a tank body; 2. a feed hopper; 3. a discharge pipe; 31. a discharge hole; 32. a valve; 4. a motor fixing seat; 5. a motor; 6. a drive shaft; 61. a slide bar; 7. a rotating shaft; 71. a slot; 72. a chute; 8. an L-shaped fixing rod; 9. a stirring plate; 91. a vertical portion; 92. an arc-shaped portion; 10. a return spring; 11. an arc-shaped bulge; 12. a touch bar; 13. an arc-shaped groove; 14. rolling a ball; 15. an ejection cartridge; 151. a pressure chamber; 152. a material storage cavity; 16. a piston; 17. an arc tube; 18. and (5) fixing the rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment provided by the invention comprises the following steps: a preparation method of solder paste for an automobile control panel comprises the following steps:
the solder paste is prepared from the following components in percentage by mass of 85: 15 of tin powder and flux paste; wherein, the tin powder comprises the following components in parts by weight: 5 parts of bismuth alloy soldering tin powder, 85 parts of Sn-Ag-Cu series soldering tin powder, 4 parts of nano titanium particles and 6 parts of graphene, wherein the soldering paste comprises the following components in parts by weight: 30 parts of disproportionated rosin, 10 parts of surfactant, 35 parts of organic solvent, 15 parts of organic resin, 5 parts of zinc chloride and 5 parts of anti-aging agent;
the preparation method of the soldering paste comprises the following steps;
s1: encapsulating the tin-bismuth alloy soldering tin powder, the Sn-Ag-Cu series soldering tin powder and the nano titanium particles in parts by weight in a vacuum quartz tube, and then filling high-purity nitrogen protective gas;
s2: putting the raw materials packaged in the step S1 into a reaction furnace for smelting and heat treatment to obtain completely molten liquid;
s3: placing graphene in a stirring ball mill, filling liquid nitrogen into the stirring ball mill until the liquid nitrogen completely submerges the grinding balls, performing ball milling, taking out powder subjected to ball milling, adding the powder into the melt obtained in the step S2, stirring, placing the mixture in an inert gas protection box, cooling to room temperature, and then placing the mixture in a mold for hot pressing and sintering to obtain solder alloy powder;
s4: adding the weighed organic resin, disproportionated rosin, zinc chloride and anti-aging agent into a homogenizing device for 10 minutes, adding a surfactant into the homogenizing device, and continuously stirring for 4 minutes to obtain the soldering flux;
s5: and pouring the soldering flux obtained in the step S4 and the solder alloy powder obtained in the step S3 into a vacuum stirrer, and filling nitrogen to stir at a low speed to obtain the solder paste.
As shown in fig. 1-3, a homogenizing device used in a method for preparing solder paste for an automobile control panel comprises a tank body 1, a stirring mechanism and an injection mechanism, wherein one side of the tank body 1 is provided with a feed hopper 2 communicated with the inside of the tank body 1, a discharge pipe 3 penetrates through the central position of the bottom of the tank body 1, the bottom wall of the tank body 1 of the discharge pipe 3 is fixedly connected, the discharge pipe 3 at the bottom end inside the tank body 1 is uniformly provided with discharge holes 31, and a valve 32 is arranged on the discharge pipe 3 at the bottom of the tank body 1;
the stirring mechanism comprises a driving part, a stirring part and a displacement part, wherein the driving part comprises a motor 5 arranged at the middle position of the top of the tank body 1 through a motor fixing seat 4 and a driving shaft 6 fixed at the output end of the motor 5 and penetrating through the top wall of the tank body 1 to extend into the tank body 1, and the outer side of the bottom end of the driving shaft 6 is uniformly provided with sliding strips 61 along the circumferential direction; the stirring component comprises a rotating shaft 7 which is coaxial with the driving shaft 6 and is slidably connected to the bottom end of the driving shaft 6, an L-shaped fixing rod 8 which is uniformly arranged on the outer side of the top end of the rotating shaft 7 along the circumferential direction, and a stirring plate 9 which is obliquely arranged at the bottom end of the L-shaped fixing rod 8, wherein the top end of the rotating shaft 7 is provided with a slot 71 which is matched with the driving shaft 6, a sliding groove 72 which is matched with the sliding strip 61 is uniformly arranged on the rotating shaft 7 on the outer side of the slot 71, the driving shaft 6 is inserted in the slot 71, a return spring 10 is arranged between the bottom end of the driving shaft 6 and the bottom end of the slot 71, the top end of the return spring 10 is fixedly connected with the driving shaft 6, the bottom end of the return spring 10 is fixedly connected with the bottom end of the slot 71, the stirring plate 9 comprises a vertical part 91 which is close to the side wall, The push rod 12 is arranged at the top of the L-shaped fixed rod 8 below the arc-shaped bulge 11, the arc-shaped groove 13 is arranged at the top of the push rod 12, and the rolling ball 14 is clamped in the arc-shaped groove 13;
the injection mechanism comprises an injection cylinder 15 which is coaxial with the discharge pipe 3 and is rotatably arranged at the top of the discharge pipe 3, a pressure cavity 151 and a material storage cavity 152 which are arranged inside the injection cylinder 15 from top to bottom, a piston 16 which is arranged inside the pressure cavity 151 in a sliding manner, and an arc-shaped pipe 17 which is uniformly arranged outside the injection cylinder 15 along the circumferential direction and is communicated with the material storage cavity 152, wherein one end of the arc-shaped pipe 17, which is far away from the injection cylinder 15, faces towards an arc-shaped part 92 corresponding to the stirring plate 9, fixing rods 18 are uniformly and vertically arranged at the edge position of the injection cylinder 15 along the circumferential direction, the top ends of the fixing rods 18 penetrate through corresponding L-shaped fixing rods 8, the bottom end of the driving shaft 6 extends to the top parts of the pressure cavity 151 and the piston 16, the volume of the pressure cavity 151 is larger than that of the material storage cavity 152, supporting columns are uniformly arranged at the bottom of the tank body 1, and rubber pads are arranged at the bottom ends of the supporting columns.
The homogenizing device has the specific working principle that: starting the motor 5, the motor 5 drives the driving shaft 6 to rotate, and the driving shaft 6 rotates to drive the rotating shaft 7 to rotate and further stir the materials in the tank body 1 through the stirring plate 9 at the bottom end of the L-shaped fixed rod 8, in the process, the rolling ball 14 of the abutting rod 12 at the top end of the L-shaped fixed rod 8 rolls at the top end of the tank body 1, when the material passes through the position of the arc-shaped bulge 11, the rotating shaft 7 can displace downwards and stretch the reset spring 10 through the abutting rod 12 and the L-shaped fixed rod 8, and after the material passes through the position of the arc-shaped bulge 11, the rotating shaft 7 can move upwards under the action of the reset spring 10, namely, the rotating shaft 7 can displace upwards and downwards by itself when rotating, so that the stirring plate 9 can generate the effect of shaking up and down when the materials are stirred, and meanwhile, when the rotating shaft 7 displaces upwards and downwards, the piston 16 at the bottom end of the rotating shaft can be driven to move, so that the materials in the tank body 1 can be sucked into the material storage cavity 151 through the arc-shaped pipe 17, the extrusion, in this process, the section of thick bamboo 15 can take place with the axis of rotation 7 through dead lever 18 and rotate at the same speed, and the position between arc 17 and the stirring board 9 can not change, and stirring board 9 when rotating, and the material moves to arc 92 along the vertical portion 91 of stirring board 9, and arc 17 blowout material can move the material clash to arc 92 with the vertical portion 91 along stirring board 9, makes the material granule more homogenization, promotes the quality of soldering paste.
The second embodiment is different from the first embodiment in that
In step S5, the solder paste is obtained by pouring the solder paste into a vacuum mixer, firstly stirring the solder paste for 12 to 18 minutes at a low speed, then filling nitrogen gas into the vacuum mixer, and stirring the solder paste for 50 to 60 minutes at a medium speed.
The third embodiment is different from the first embodiment in that
The solder paste is prepared from the following components in percentage by mass of 85: 15 of tin powder and flux paste; wherein, the tin powder comprises the following components in parts by weight: 8 parts of bismuth alloy soldering tin powder, 82 parts of Sn-Ag-Cu series soldering tin powder, 4 parts of nano titanium particles and 6 parts of graphene, wherein the soldering paste comprises the following components in parts by weight: 45 parts of disproportionated rosin, 8 parts of surfactant, 32 parts of organic solvent, 5 parts of organic resin, 5 parts of zinc chloride and 5 parts of anti-aging agent.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. A preparation method of solder paste for an automobile control panel is characterized by comprising the following steps:
the solder paste is prepared from the following components in percentage by mass of 85: 15 of tin powder and flux paste; wherein the tin powder comprises the following components in parts by weight: 5-8 parts of bismuth alloy soldering tin powder, 80-85 parts of Sn-Ag-Cu series soldering tin powder, 2-4 parts of nano titanium particles and 4-6 parts of graphene, wherein the soldering paste comprises the following components in parts by weight: 30-55 parts of disproportionated rosin, 8-10 parts of surfactant, 31-35 parts of organic solvent, 10-15 parts of organic resin, 5-7 parts of zinc chloride and 5-8 parts of anti-aging agent;
the preparation method of the soldering paste comprises the following steps;
s1: encapsulating the tin-bismuth alloy soldering tin powder, the Sn-Ag-Cu series soldering tin powder and the nano titanium particles in parts by weight in a vacuum quartz tube, and then filling high-purity nitrogen protective gas;
s2: putting the raw materials packaged in the step S1 into a reaction furnace for smelting and heat treatment to obtain completely molten liquid;
s3: placing graphene in a stirring ball mill, filling liquid nitrogen into the stirring ball mill until the liquid nitrogen completely submerges the grinding balls, performing ball milling, taking out powder subjected to ball milling, adding the powder into the melt obtained in the step S2, stirring, placing the mixture in an inert gas protection box, cooling to room temperature, and then placing the mixture in a mold for hot pressing and sintering to obtain solder alloy powder;
s4: adding the weighed organic resin, disproportionated rosin, zinc chloride and anti-aging agent into homogenizing equipment for 8-10 minutes, adding a surfactant into the homogenizing equipment, and continuously stirring for 3-4 minutes to obtain the soldering flux;
s5: and pouring the soldering flux obtained in the step S4 and the solder alloy powder obtained in the step S3 into a vacuum stirrer, and filling nitrogen to stir at a low speed to obtain the solder paste.
2. The method for producing a solder paste for an automobile control panel according to claim 1, characterized in that: in step S5, the mixture is poured into a vacuum mixer and stirred at a low speed for 12-18 minutes, then nitrogen is filled in the vacuum mixer and stirred at a medium speed for 50-60 minutes.
3. The method for producing a solder paste for an automobile control panel according to claim 1, characterized in that: 5 parts of bismuth alloy soldering tin powder, 85 parts of Sn-Ag-Cu series soldering tin powder, 4 parts of nano titanium particles and 6 parts of graphene.
4. The homogenizing device adopted by the preparation method of the solder paste for the automobile control panel is characterized in that: the material mixing device comprises a tank body (1), a stirring mechanism and an injection mechanism, wherein a feed hopper (2) communicated with the interior of the tank body (1) is arranged on one side of the tank body (1), a material discharging pipe (3) penetrates through the central position of the bottom of the tank body (1), the bottom wall of the tank body (1) of the material discharging pipe (3) is fixedly connected, material discharging holes (31) are uniformly formed in the position of the material discharging pipe (3) at the bottom of the interior of the tank body (1), and a valve (32) is arranged on the material discharging pipe (3) at the bottom of the tank body (1);
the stirring mechanism comprises a driving part, a stirring part and a displacement part, wherein the driving part comprises a motor (5) which is arranged at the middle position of the top of the tank body (1) through a motor fixing seat (4) and a driving shaft (6) which is fixed at the output end of the motor (5) and penetrates through the top wall of the tank body (1) to extend into the tank body (1), and sliding strips (61) are uniformly arranged on the outer side of the bottom end of the driving shaft (6) along the circumferential direction of the driving shaft; the stirring component comprises a rotating shaft (7) which is coaxial with the driving shaft (6) and is slidably connected to the bottom end of the driving shaft (6), an L-shaped fixed rod (8) which is uniformly arranged on the outer side of the top end of the rotating shaft (7) along the circumferential direction, and a stirring plate (9) which is obliquely arranged on the bottom end of the L-shaped fixed rod (8), wherein the top end of the rotating shaft (7) is provided with a slot (71) which is matched with the driving shaft (6), a sliding groove (72) which is matched with the sliding strip (61) is uniformly arranged on the rotating shaft (7) on the outer side of the slot (71), the driving shaft (6) is inserted into the slot (71), a reset spring (10) is arranged between the bottom end of the driving shaft (6) and the bottom end of the slot (71), the top end of the reset spring (10) is fixedly connected with the driving shaft (6), and the bottom end of the reset spring (10) is fixedly connected with the bottom end of the slot (71), the stirring plate (9) comprises a vertical part (91) close to the side wall of the tank body (1) and an arc part (92) close to the center of the tank body (1), and the displacement part comprises four arc bulges (11) uniformly arranged at the top of the tank body (1) by taking the driving shaft (6) as a circle center, a touch rod (12) arranged at the top of an L-shaped fixed rod (8) below the arc bulges (11), an arc groove (13) arranged at the top of the touch rod (12) and a rolling ball (14) clamped inside the arc groove (13);
the injection mechanism comprises an injection cylinder (15) which is coaxial with the discharge pipe (3) and is rotationally arranged at the top of the discharge pipe (3), a pressure cavity (151) and a storage cavity (152) which are arranged in the injection cylinder (15) from top to bottom, a piston (16) which is arranged in the pressure cavity (151) in a sliding way, and arc-shaped pipes (17) which are uniformly arranged outside the injection cylinder (15) along the circumferential direction and are communicated with the storage cavity (152), wherein one end of the arc-shaped pipe (17) far away from the spray cylinder (15) faces to the arc-shaped part (92) of the corresponding stirring plate (9), fixing rods (18) are uniformly and vertically arranged at the edge of the injection cylinder (15) along the circumferential direction, and the top end of the fixing rod (18) penetrates through the corresponding L-shaped fixing rod (8), and the bottom end of the driving shaft (6) extends to the pressure cavity (151) and is fixedly connected with the top of the piston (16).
5. The method for manufacturing solder paste for automotive control panels and the apparatus for homogenizing the same according to claim 1, wherein: the volume of the pressure chamber (151) is greater than the volume of the reservoir chamber (152).
6. The method for manufacturing solder paste for automotive control panels and the apparatus for homogenizing the same according to claim 1, wherein: the bottom of the tank body (1) is uniformly provided with support columns, and the bottom ends of the support columns are provided with rubber pads.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510406A (en) * | 2020-08-12 | 2021-10-19 | 江苏三沃电子科技有限公司 | Microelectronic assembly solder paste and preparation method thereof |
| CN115673598A (en) * | 2022-10-29 | 2023-02-03 | 江苏三沃电子科技有限公司 | Preparation process of soldering paste |
| US20230199949A1 (en) * | 2021-12-16 | 2023-06-22 | Dell Products L.P. | Solder composition for use in solder joints of printed circuit boards |
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| CN115673598A (en) * | 2022-10-29 | 2023-02-03 | 江苏三沃电子科技有限公司 | Preparation process of soldering paste |
| CN115673598B (en) * | 2022-10-29 | 2023-11-21 | 江苏三沃电子科技有限公司 | Preparation process of soldering paste |
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