Processing technology and preparation device of heat-conducting glue

Abstract

The invention discloses a processing technology and a preparation device of heat-conducting glue, and relates to the technical field of heat-conducting glue, and the technical scheme is that the heat-conducting glue comprises 25%-35% of dynamic covalent bond epoxy resin, 50%-60% of waste ceramic micro powder, 3%-7% of graphene nanosheets, 8%-11% of polymercaptan, 1%-3% of rubber microspheres and 3%-7% of a flame retardant, the flame retardant is mixed powder of aluminum hydroxide, zinc borate, modified montmorillonite, a silane coupling agent and titanium dioxide, and the ratio of the aluminum hydroxide to the zinc borate to the modified montmorillonite to the silane coupling agent to the titanium dioxide is 60: 20: 8: 2: 5. The molecular structure of the dynamic covalent bond epoxy resin contains covalent bonds which can be dynamically exchanged, and the dynamic covalent bonds can be reversibly fractured and reformed at a certain temperature, so that the self-repairing of the material is realized, and the prepared heat-conducting adhesive can repair micro cracks on the surface when being used, so that the service life of the heat-conducting adhesive is prolonged. Therefore, the service life of the colloid can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal conductive adhesives, and in particular to a processing technology and a preparation device of thermal conductive adhesives. Background Art

[0002] Thermally conductive adhesives include polyurethane or epoxy resins. Thermally conductive adhesives have the function of conducting heat. For example, a heating device generates heat, which can be dissipated through thermal conductive adhesives. Thermal conductive adhesives prepared using existing thermal conductive adhesive formulas are found to have tiny cracks on the surface of the adhesive after a period of use, which in turn reduces the service life of the thermal conductive adhesive. Therefore, improvements are needed. Therefore, it is necessary to invent a processing technology and a preparation device for thermally conductive adhesive. Summary of the Invention

[0003] To this end, the present invention provides a processing technology and a preparation device for a thermally conductive adhesive to solve the problems in the background technology.

[0004] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a processing technology for thermally conductive adhesive, comprising: Dynamic covalent bond epoxy resin 25% to 35%, waste ceramic powder 50% to 60%, graphene nanosheets 3% to 7%, polythiol 8% to 11%, rubber microspheres 1% to 3% and flame retardant 3% to 7%; The flame retardant is a mixed powder of aluminum hydroxide, zinc borate, modified montmorillonite, a silane coupling agent and titanium dioxide, and the ratio of the aluminum hydroxide, zinc borate, modified montmorillonite, a silane coupling agent and titanium dioxide is 60:20:8:2:5.

[0005] Preferably, the specific steps are as follows: S1. Epoxy resin premixing: Place the dynamic covalent bond epoxy resin into a hot mixer and preheat and stir at 55°C to give it good fluidity for subsequent mixing with other ingredients; S2. Add filler: slowly add waste ceramic micropowder and graphene nanosheets while stirring, and continue stirring to evenly disperse the filler in the epoxy resin; S3. Adding flame retardant: adding the flame retardant to the above mixture and continuing to stir to make the flame retardant evenly distributed in the system; S4. Adding polythiol and rubber microspheres: adding polythiol and rubber microspheres, and then stirring to fully mix the ingredients to obtain a semi-finished thermal conductive adhesive; S5. Vacuum degassing: Place the semi-finished thermal conductive adhesive into a vacuum drying oven and perform vacuum drying at a certain vacuum degree of -0.09MPa to remove bubbles in the material, thereby obtaining the finished thermal conductive adhesive. Degassing can improve the performance and quality of the thermal conductive adhesive and avoid the occurrence of pore defects during use. S6. Packaging and Storage: Transfer the prepared thermal conductive adhesive to a sealed container for packaging. After packaging, store it in a cool, dry place, away from direct sunlight and high temperature environment to prevent the thermal conductive adhesive from deteriorating or solidifying during storage; The present invention also provides a device for preparing a thermally conductive adhesive, comprising: A mixing barrel, wherein the outer casing of the mixing barrel is provided with an outer frame, the bottom of the outer frame is provided with a bottom plate, and four supporting legs are fixedly connected between the bottom plate and the outer frame; The outer shell is fixedly mounted on the outside of the mixing barrel, and the front and rear sides of the mixing barrel are fixedly connected to electric heating plates, and the two electric heating plates are located inside the outer shell. Two connecting rods are embedded in the outer frame, and the two connecting rods are fixedly connected to the front and rear sides of the outer shell respectively; A rotating shaft 1 is embedded in the top of the mixing barrel, and the bottom end of the rotating shaft 1 is connected to the inner wall of the bottom of the mixing barrel. Two stirring rods 1 are fixedly sleeved on the outside of the rotating shaft 1, and a stirring rod 2 is slidably sleeved on the outside of the rotating shaft 1. The stirring rod 2 is located between the two stirring rods 1, and three scraping rods are fixedly connected between the two stirring rods 1. The three scraping rods are in sliding contact with the inner wall of the mixing barrel. A scraper is fixedly connected to the rear side of the rotating shaft 1, and the scraper is in sliding contact with the inner wall of the mixing barrel. A turntable, which is fixedly sleeved on the outside of the rotating shaft 1, a motor is fixedly connected to the top of the mixing barrel, a bevel gear 1 is fixedly connected to the output shaft of the motor, a bevel gear ring is provided on the front side of the bevel gear 1 and is meshed with the bevel gear ring, and the bevel gear ring is fixedly connected to the top of the turntable; An auxiliary component, which is used to control the continuous up and down movement of the stirring rod 2; Two swing assemblies are provided and used to make the mixing barrel swing back and forth with the two connecting rods as the rotation axis; Preferably, a feeding hopper is fixedly embedded on the top of the mixing barrel, a discharge pipe is fixedly embedded on one side of the mixing barrel, and a switch valve is provided on the discharge pipe.

[0006] Preferably, the auxiliary component includes a shell, which is fixedly connected to the top of the turntable, and a reciprocating screw 1 is embedded in the turntable, and the top of the reciprocating screw 1 is connected to the inner wall of the top of the shell, and a sliding seat 1 is provided on the outside of the reciprocating screw 1, and the sliding seat 1 is connected to the reciprocating screw 1 through a ball screw pair, and a first gear is provided on the outside of the bottom end of the reciprocating screw 1, and the first gear is connected to the reciprocating screw 1 through a one-way bearing, and a first gear ring is fixedly connected to the top of the mixing barrel, and the first gear is meshed with the first gear ring, and the reciprocating screw 1 is connected to the turntable and the shell through a bearing.

[0007] Preferably, the rotating shaft 1 is set to be hollow, and a slider is provided for sliding inside the rotating shaft 1. A magnetic block is fixedly connected to the bottom end of the slider. Iron blocks that are attracted to the magnetic block are provided on the front and rear sides of the magnetic block. The two iron blocks are fixedly embedded on the stirring rod 2. A stabilizing block is fixedly connected inside the rotating shaft 1, and a pull rod is fixedly connected between the sliding seat 1 and the slider. The pull rod passes through the stabilizing block and is in sliding contact with it. Limit rods are fixedly connected to both sides of the rotating shaft 1, and the two limit rods pass through the stirring rod 2 and are in sliding contact with it.

[0008] Preferably, the swing assembly includes a connecting plate, which is fixedly connected to one side of the mixing barrel, and the top of the connecting plate and the top of the mixing barrel are fixedly connected to a support block, and a reciprocating screw 2 is embedded in the two support blocks, and a sliding seat 2 is provided on the outside of the reciprocating screw 2, and the sliding seat 2 is connected to the reciprocating screw 2 through a ball screw pair, and a bevel gear 2 is provided on the outside of one end of the reciprocating screw 2, and the bevel gear 2 is connected to the reciprocating screw 2 through a one-way bearing, and the bevel gear 2 is meshed with the bevel gear ring, and the reciprocating screw 2 is connected to the support block through a bearing.

[0009] Preferably, the top of the connecting plate is fixedly connected to a box body 1, one side of the box body 1 is set to be open, a piston 1 is slidably provided inside the box body 1, a moving rod is fixedly connected between the piston 1 and the sliding seat 2, the bottom of the connecting plate is provided with a box body 2, a through groove is opened on the box body 2, a piston 2 is slidably provided inside the box body 2, a push rod is fixedly connected to the piston 2, the push rod passes through the through groove and is in sliding contact with it, the push rod is movably connected to the mixing barrel by a rotating shaft, the box body 2 is movably connected to the outer frame by a rotating shaft, a hose is fixedly connected between the box body 2 and the box body 1, two swing rods are fixedly connected to the bottom of the outer frame, and arc rods are fixedly connected to the front and rear sides of the shell, and the two arc rods pass through the swing rod and are in sliding contact with it.

[0010] Preferably, the rotating shaft 1 is connected to the mixing barrel via a sealed bearing.

[0011] The beneficial effects of the present invention are: 1. The present invention adds a dynamic covalent bond epoxy resin to the thermal conductive adhesive formula. The dynamic covalent bond epoxy resin contains dynamically exchangeable covalent bonds in its molecular structure. These dynamic covalent bonds can reversibly break and reform at a certain temperature, thereby achieving self-repair of the material. The thermal conductive adhesive prepared in this way can repair tiny cracks on the surface during use, thereby extending the service life of the adhesive. 2. The present invention adds waste ceramic powder to the thermal conductive adhesive formula. The waste ceramic powder is made by grinding waste circuit boards, and the waste circuit boards contain aluminum oxide and silicon dioxide. In this way, the thermal conductive adhesive can achieve waste utilization while ensuring thermal conductivity. 3. The present invention adds a flame retardant to the formula of the thermal conductive adhesive, so that the thermal conductive adhesive produced in this way has a certain combustion-supporting ability when used, which can play a combustion-supporting effect when an open flame occurs, thereby preventing the fire from further spreading. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0013] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0014] Figure 1 This is a schematic diagram of the overall structure of the device for preparing the thermally conductive adhesive provided by the present invention; Figure 2 A front cross-sectional view of a device for preparing the thermally conductive adhesive provided by the present invention; Figure 3 Preparation device for thermally conductive adhesive provided by the present invention Figure 2 A magnified view of point A in the figure; Figure 4 Preparation device for thermally conductive adhesive provided by the present invention Figure 2 Enlarged view of point B in FIG. Figure 5 A side sectional view of a device for preparing the thermally conductive adhesive provided by the present invention; Figure 6 Preparation device for thermally conductive adhesive provided by the present invention Figure 5Enlarged view of point C in the figure; Figure 7 A three-dimensional diagram of the components of the device for preparing the thermally conductive adhesive provided by the present invention, including the rotating shaft 1, stirring rod 1, and stirring rod 2; Figure 8 Preparation device for thermally conductive adhesive provided by the present invention Figure 7 Exploded perspective diagram; Figure 9 Preparation device for thermally conductive adhesive provided by the present invention Figure 8 The enlarged view of point D in the figure; Figure 10 A rear perspective view of a device for preparing the thermally conductive adhesive provided by the present invention; In the figure: 1. mixing barrel; 2. outer frame; 3. bottom plate; 4. supporting legs; 5. outer shell; 6. electric heating plate; 7. connecting rod; 8. rotating shaft 1; 9. stirring rod 1; 10. stirring rod 2; 11. scraper rod; 12. scraper; 13. turntable; 14. motor; 15. bevel gear 1; 16. bevel gear ring; 17. feeding hopper; 18. discharge pipe; 19. switch valve; 20. shell; 21. reciprocating screw 1; 22. sliding seat 1; 23. Gear 1; 24. First gear ring; 25. Slider; 26. Magnetic block; 27. Iron block; 28. Stabilizing block; 29. ​​Pull rod; 30. Limiting rod; 31. Connecting plate; 32. Support block; 33. Reciprocating screw 2; 34. Sliding seat 2; 35. Bevel gear 2; 36. Box 1; 37. Piston 1; 38. Moving rod; 39. Box 2; 40. Piston 2; 41. Push rod; 42. Hose; 43. Swing rod; 44. Arc rod. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0016] Example 1: The present invention provides a processing technology for thermally conductive adhesive, comprising: Dynamic covalent bond epoxy resin 30%, waste ceramic powder 50%, graphene nanosheets 7%, polythiol 8%, rubber microspheres 2% and flame retardant 3%; The flame retardant is a mixed powder of aluminum hydroxide, zinc borate, modified montmorillonite, silane coupling agent and titanium dioxide, wherein the ratio of aluminum hydroxide, zinc borate, modified montmorillonite, silane coupling agent and titanium dioxide is 60:20:8:2:5; The specific steps are as follows: S1. Epoxy resin premixing: Place the dynamic covalent bond epoxy resin into a hot mixer and preheat and stir at 55°C to give it good fluidity for subsequent mixing with other ingredients; S2. Add filler: slowly add waste ceramic micropowder and graphene nanosheets while stirring, and continue stirring to evenly disperse the filler in the epoxy resin; S3. Adding flame retardant: adding the flame retardant to the above mixture and continuing to stir to make the flame retardant evenly distributed in the system; S4. Adding polythiol and rubber microspheres: adding polythiol and rubber microspheres, and then stirring to fully mix the ingredients to obtain a semi-finished thermal conductive adhesive; S5. Vacuum degassing: Place the semi-finished thermal conductive adhesive into a vacuum drying oven and perform vacuum drying at a certain vacuum degree of -0.09MPa to remove bubbles in the material, thereby obtaining the finished thermal conductive adhesive. Degassing can improve the performance and quality of the thermal conductive adhesive and avoid the occurrence of pore defects during use. S6. Packaging and Storage: Transfer the prepared thermal conductive adhesive to a sealed container for packaging. After packaging, store it in a cool, dry place, away from direct sunlight and high temperature environment to prevent the thermal conductive adhesive from deteriorating or solidifying during storage; Example 2: The present invention provides a processing technology for thermally conductive adhesive, comprising: Dynamic covalent bond epoxy resin 25%, waste ceramic powder 55%, graphene nanosheets 3%, polythiol 11%, rubber microspheres 3% and flame retardant 3%; The flame retardant is a mixed powder of aluminum hydroxide, zinc borate, modified montmorillonite, a silane coupling agent, and titanium dioxide, wherein the ratio of aluminum hydroxide, zinc borate, modified montmorillonite, a silane coupling agent, and titanium dioxide is 60:20:8:2:5, and the filter diameter of the flame retardant mixed powder is 1-10 μm; The specific steps are as follows: S1. Epoxy resin premixing: Place the dynamic covalent bond epoxy resin into a hot mixer and preheat and stir at 55°C to give it good fluidity for subsequent mixing with other ingredients; S2. Add filler: slowly add waste ceramic micropowder and graphene nanosheets while stirring, and continue stirring to evenly disperse the filler in the epoxy resin; S3. Adding flame retardant: adding the flame retardant to the above mixture and continuing to stir to make the flame retardant evenly distributed in the system; S4. Adding polythiol and rubber microspheres: adding polythiol and rubber microspheres, and then stirring to fully mix the ingredients to obtain a semi-finished thermal conductive adhesive; S5. Vacuum degassing: Place the semi-finished thermal conductive adhesive into a vacuum drying oven and perform vacuum drying at a certain vacuum degree of -0.09MPa to remove bubbles in the material, thereby obtaining the finished thermal conductive adhesive. Degassing can improve the performance and quality of the thermal conductive adhesive and avoid the occurrence of pore defects during use. S6. Packaging and Storage: Transfer the prepared thermal conductive adhesive to a sealed container for packaging. After packaging, store it in a cool, dry place, away from direct sunlight and high temperature environment to prevent the thermal conductive adhesive from deteriorating or solidifying during storage; Example 3: The present invention provides a processing technology for thermally conductive adhesive, comprising: Dynamic covalent bond epoxy resin 35%, waste ceramic powder 50%, graphene nanosheets 3%, polythiol 8%, rubber microspheres 1% and flame retardant 7%; The flame retardant is a mixed powder of aluminum hydroxide, zinc borate, modified montmorillonite, silane coupling agent and titanium dioxide, wherein the ratio of aluminum hydroxide, zinc borate, modified montmorillonite, silane coupling agent and titanium dioxide is 60:20:8:2:5; The specific steps are as follows: S1. Epoxy resin premixing: Place the dynamic covalent bond epoxy resin into a hot mixer and preheat and stir at 55°C to give it good fluidity for subsequent mixing with other ingredients; S2. Add filler: slowly add waste ceramic micropowder and graphene nanosheets while stirring, and continue stirring to evenly disperse the filler in the epoxy resin; S3. Adding flame retardant: adding the flame retardant to the above mixture and continuing to stir to make the flame retardant evenly distributed in the system; S4. Adding polythiol and rubber microspheres: adding polythiol and rubber microspheres, and then stirring to fully mix the ingredients to obtain a semi-finished thermal conductive adhesive; S5. Vacuum degassing: Place the semi-finished thermal conductive adhesive into a vacuum drying oven and perform vacuum drying at a certain vacuum degree of -0.09MPa to remove bubbles in the material, thereby obtaining the finished thermal conductive adhesive. Degassing can improve the performance and quality of the thermal conductive adhesive and avoid the occurrence of pore defects during use. S6. Packaging and Storage: Transfer the prepared thermal conductive adhesive to a sealed container for packaging. After packaging, store it in a cool, dry place, away from direct sunlight and high temperature environment to prevent the thermal conductive adhesive from deteriorating or solidifying during storage; The thermally conductive adhesives obtained by the processing techniques of Examples 1-3 above were tested to obtain the following data, which are shown in the following table:

[0017] As shown in the table above, the formula of Example 1 leads with an ultra-high thermal conductivity of 6.8 W / m·K. The ceramic powder and graphene synergistically enhance the performance, while also possessing dynamic self-healing capabilities and a balanced rigidity and flexibility, making it perfectly adapted to the thermal deformation of electronic devices. The use of 50% waste ceramic powder reduces costs by over 40%, is environmentally friendly, and has passed UL94 V-1 flame retardant certification. Therefore, the thermally conductive adhesive made with the formula of Example 1 is of the highest quality.

[0018] Example 4: Reference Attachment Figure 1-10 The present invention also provides a device for preparing a thermally conductive adhesive, which is characterized by comprising: A mixing barrel 1, the outer casing of the mixing barrel 1 is provided with an outer frame 2, the bottom of the outer frame 2 is provided with a bottom plate 3, and four supporting legs 4 are fixedly connected between the bottom plate 3 and the outer frame 2; The outer shell 5 is fixedly mounted on the outside of the mixing barrel 1. The front and rear sides of the mixing barrel 1 are fixedly connected to electric heating plates 6. The two electric heating plates 6 are both located inside the outer shell 5. Two connecting rods 7 are embedded in the outer frame 2. The two connecting rods 7 are fixedly connected to the front and rear sides of the outer shell 5 respectively. A rotating shaft 8 is embedded in the top of the mixing barrel 1, and the bottom end of the rotating shaft 8 is connected to the inner wall of the bottom of the mixing barrel 1. Two stirring rods 9 are fixedly sleeved on the outside of the rotating shaft 8. A stirring rod 2 10 is also slidably sleeved on the outside of the rotating shaft 8. The stirring rod 2 10 is located between the two stirring rods 9. Three scraping rods 11 are fixedly connected between the two stirring rods 9. The three scraping rods 11 are in sliding contact with the inner wall of the mixing barrel 1. A scraper 12 is fixedly connected to the rear side of the rotating shaft 8, and the scraper 12 is in sliding contact with the inner wall of the mixing barrel 1. The turntable 13 is fixedly sleeved on the outside of the rotating shaft 8. The top of the mixing barrel 1 is fixedly connected to the motor 14. The output shaft of the motor 14 is fixedly connected to the bevel gear 15. The front side of the bevel gear 15 is provided with a bevel gear ring 16 meshing with it. The bevel gear ring 16 is fixedly connected to the top of the turntable 13. Auxiliary component, which is used to control the continuous up and down movement of the stirring rod 2 10; The swing assembly is provided in two and is used to make the mixing barrel 1 swing back and forth with the two connecting rods 7 as the rotation axis. In this embodiment, the motor 14 drives the bevel gear 15 to rotate, the rotation of the bevel gear 15 drives the bevel gear ring 16 to rotate, the rotation of the bevel gear ring 16 drives the turntable 13 and the rotating shaft 18 to rotate, and the rotation of the rotating shaft 18 drives the two stirring rods 19, the stirring rod 2 10, the scraper 11 and the scraper 12 to rotate, thereby stirring and melting the dynamic covalent bond epoxy resin; In order to achieve the purpose of feeding and discharging, the device adopts the following technical solutions: a feeding hopper 17 is fixedly embedded on the top of the mixing barrel 1, a discharge pipe 18 is fixedly embedded on one side of the mixing barrel 1, and a switch valve 19 is provided on the discharge pipe 18; Among them, in order to achieve the purpose of moving the stirring rod 21 up and down, the present device adopts the following technical solutions: the auxiliary component includes a shell 20, the shell 20 is fixedly connected to the top of the turntable 13, a reciprocating screw 21 is embedded in the turntable 13, the top of the reciprocating screw 21 is connected to the inner wall of the top of the shell 20, the reciprocating screw 21 is externally sleeved with a sliding seat 22, the sliding seat 22 is connected to the reciprocating screw 21 through a ball screw pair, the bottom end of the reciprocating screw 21 is externally sleeved with a first gear 23, the first gear 23 is connected to the reciprocating screw 21 through a one-way bearing, the top of the mixing barrel 1 is fixedly connected to a first gear ring 24, the first gear 23 is meshed with the first gear ring 24, and the reciprocating The lead screw 21 is connected to the turntable 13 and the housing 20 through a bearing. The rotating shaft 8 is set to be hollow. A slider 25 is slidingly provided inside the rotating shaft 8. A magnetic block 26 is fixedly connected to the bottom end of the slider 25. Iron blocks 27 that attract each other are provided on the front and rear sides of the magnetic block 26. The two iron blocks 27 are fixedly embedded in the stirring rod 2 10. A stabilizing block 28 is fixedly connected to the rotating shaft 8. A pull rod 29 is fixedly connected between the sliding seat 22 and the slider 25. The pull rod 29 passes through the stabilizing block 28 and is in sliding contact with it. Limit rods 30 are fixedly connected to both sides of the rotating shaft 8. The two limit rods 30 pass through the stirring rod 2 10 and are in sliding contact with it. The auxiliary component can make the stirring rod 2 10 move up and down continuously. Among them, in order to achieve the purpose of swinging the mixing barrel 1, the present device adopts the following technical solutions: the swinging component includes a connecting plate 31, the connecting plate 31 is fixedly connected to one side of the mixing barrel 1, the top of the connecting plate 31 and the top of the mixing barrel 1 are fixedly connected to a support block 32, a reciprocating screw 2 33 is embedded in the two support blocks 32, the reciprocating screw 2 33 is externally sleeved with a sliding seat 2 34, the sliding seat 2 34 is connected to the reciprocating screw 2 33 through a ball screw pair, one end of the reciprocating screw 2 33 is externally sleeved with a bevel gear 2 35, the bevel gear 2 35 is connected to the reciprocating screw 2 33 through a one-way bearing, the bevel gear 2 35 is meshed with the bevel gear ring 16, the reciprocating screw 2 33 is connected to the support block 32 through a bearing, the top of the connecting plate 31 is fixedly connected to a box body 1 36, one side of the box body 1 36 is set to be open, and the box body A piston 1 37 is provided for sliding inside the first 36, and a moving rod 38 is fixedly connected between the piston 1 37 and the sliding seat 2 34, a box body 2 39 is provided at the bottom of the connecting plate 31, and a through groove is provided on the box body 2 39, and a piston 2 40 is provided for sliding inside the box body 2 39, and a push rod 41 is fixedly connected to the piston 2 40, and the push rod 41 passes through the through groove and is in sliding contact with the through groove, and the push rod 41 is movably connected to the mixing barrel 1 through a rotating shaft, and the box body 2 39 is movably connected to the outer frame 2 through a rotating shaft, and a hose 42 is fixedly connected between the box body 2 39 and the box body 1 36, and two swing rods 43 are fixedly connected to the bottom of the outer frame 2, and arc rods 44 are fixedly connected to the front and rear sides of the outer shell 5, and the two arc rods 44 both pass through the swing rod 43 and are in sliding contact with it. The swing assembly can make the mixing barrel 1 swing back and forth with the connecting rod 7 as the rotation axis; Among them, in order to achieve the purpose of reducing wear, this device adopts the following technical solution: the rotating shaft 8 is connected to the mixing barrel 1 through a sealed bearing. The sealed bearing connection can reduce wear and prevent materials from entering the bearing.

[0019] The use process of the present invention is as follows: when using the present invention, dynamic covalent bond epoxy resin is put into the mixing barrel 1, and then the electric heating plate 6 is controlled to work, so that the dynamic covalent bond epoxy resin can be heated, and at the same time, the motor 14 is controlled to rotate forward, and the forward rotation of the motor 14 drives the bevel gear 15 to rotate, and the rotation of the bevel gear 15 drives the bevel gear ring 16 to rotate, and the rotation of the bevel gear ring 16 drives the turntable 13 and the rotating shaft 8 to rotate, and the rotation of the rotating shaft 8 drives the two stirring rods 19, the stirring rod 2 10, the scraper 11 and the scraper 12 to rotate, thereby stirring and melting the dynamic covalent bond epoxy resin, and then adding waste ceramic micropowder, graphene nanosheets, flame retardants, polythiol and rubber microspheres in sequence. After all the raw materials are added, the motor 14 is controlled to reverse, so that the bevel gear 15 also drives the turntable 13 and the rotating shaft 8 to rotate, thereby continuing to stir and mix the raw materials; The rotation of the turntable 13 can also make the shell 20 and the reciprocating screw 1 21 rotate accordingly. When rotating accordingly, the first gear 23 will mesh with the first gear ring 24. In this way, the reciprocating screw 1 21 will also rotate when rotating accordingly, which can drive the sliding seat 1 22, the pull rod 29, the slider 25 and the magnetic block 26 to move up and down continuously. Since there is an iron block 27 in the stirring rod 2 10 that is attracted to the magnetic block 26, the stirring rod 2 10 can be made to rotate and move up and down continuously under the action of magnetic force, so that the stirring effect can be increased when the raw materials are stirred. When the turntable 13 and the bevel gear ring 16 rotate, the two bevel gears 2 35 can also be rotated. The rotation of the two bevel gears 2 35 drives the two reciprocating screws 2 33 to rotate. The rotation of the two reciprocating screws 2 33 drives the two sliding seats 2 34 to move left and right continuously, thereby making the two moving The rod 38 and the two pistons 1 37 continuously move left and right, and the two pistons 1 37 move in the same direction. In this way, when the two pistons 1 37 move left and right under the action of the two hoses 42, the air between the two box bodies 1 36 and the two box bodies 2 39 can flow back and forth, thereby causing the pistons 2 40 and the push rods 41 on both sides to telescope and move. Since the push rods 41 and the mixing barrel 1 are movably connected by a rotating shaft, and the box body 2 39 and the outer frame 2 are movably connected by a rotating shaft, the two can move between them. In this way, when the push rods 41 on both sides telescope and move, one push rod 41 can exert a pulling force on the mixing barrel 1 and the other can exert a pushing force on the mixing barrel 1. This can be repeated to make the mixing barrel 1 swing with the connecting rod 7 as the rotation axis, so that the state of the materials inside the mixing barrel 1 can be changed, so that the mixing quality can be increased during stirring, and the various raw materials can be fully blended together. The first gear 23 is connected to the reciprocating screw 1 21 through a one-way bearing, and the bevel gear 2 35 is connected to the reciprocating screw 2 33 through a one-way bearing, so when the motor 14 rotates forward, the reciprocating screw 1 21 and the reciprocating screw 2 33 do not rotate; When the stirring and mixing is completed, the switch valve 19 is opened so that the material can be discharged through the discharge pipe 18.

[0020] The above are merely preferred embodiments of the present invention. Anyone skilled in the art may modify the present invention using the above-described technical solutions or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent replacement based on the technical solutions of the present invention falls within the scope of protection claimed by the present invention.

Claims

1. A processing technology for thermal conductive adhesive, characterized in that: include: Dynamic covalent bond epoxy resin 25% to 35%, waste ceramic powder 50% to 60%, graphene nanosheets 3% to 7%, polythiol 8% to 11%, rubber microspheres 1% to 3% and flame retardant 3% to 7%; The flame retardant is a mixed powder of aluminum hydroxide, zinc borate, modified montmorillonite, a silane coupling agent and titanium dioxide, and the ratio of the aluminum hydroxide, zinc borate, modified montmorillonite, a silane coupling agent and titanium dioxide is 60:20:8:2:

5.

2. The processing technology of a thermal conductive adhesive according to claim 1, characterized in that: The specific steps are as follows: S1. Epoxy resin premixing: Place the dynamic covalent bond epoxy resin into a hot mixer and preheat and stir at 55°C to give it good fluidity for subsequent mixing with other ingredients; S2. Add filler: slowly add waste ceramic micropowder and graphene nanosheets while stirring, and continue stirring to evenly disperse the filler in the epoxy resin; S3. Adding flame retardant: adding the flame retardant to the above mixture and continuing to stir to make the flame retardant evenly distributed in the system; S4. Adding polythiol and rubber microspheres: adding polythiol and rubber microspheres, and then stirring to fully mix the ingredients to obtain a semi-finished thermal conductive adhesive; S5. Vacuum degassing: Place the semi-finished thermal conductive adhesive into a vacuum drying oven and perform vacuum drying at a certain vacuum degree of -0.09MPa to remove bubbles in the material, thereby obtaining the finished thermal conductive adhesive. Degassing can improve the performance and quality of the thermal conductive adhesive and avoid the occurrence of pore defects during use. S6. Packaging and storage: Transfer the prepared thermal conductive adhesive to a sealed container for packaging. After packaging, store it in a cool, dry place, avoiding direct sunlight and high temperature environment to prevent the thermal conductive adhesive from deteriorating or solidifying during storage.

3. A device for preparing thermally conductive adhesive, suitable for the processing technology of any one of claims 1-2 above, characterized in that: include: A mixing barrel (1), wherein the mixing barrel (1) is provided with an outer frame (2) on the outside, a bottom plate (3) is provided at the bottom of the outer frame (2), and four supporting legs (4) are fixedly connected between the bottom plate (3) and the outer frame (2); The outer shell (5) is fixedly sleeved on the outside of the mixing barrel (1), and the front and rear sides of the mixing barrel (1) are fixedly connected to electric heating plates (6), and the two electric heating plates (6) are both located inside the outer shell (5). Two connecting rods (7) are embedded in the outer frame (2), and the two connecting rods (7) are fixedly connected to the front and rear sides of the outer shell (5) respectively; A rotating shaft (8) is embedded in the top of the mixing barrel (1), and the bottom end of the rotating shaft (8) is connected to the inner wall of the bottom of the mixing barrel (1). The outer portion of the rotating shaft (8) is fixedly sleeved with two stirring rods (9), and the outer portion of the rotating shaft (8) is also slidably sleeved with a stirring rod (10). The stirring rod (10) is located between the two stirring rods (9). Three scraping rods (11) are fixedly connected between the two stirring rods (9), and the three scraping rods (11) are all in sliding contact with the inner wall of the mixing barrel (1). A scraper (12) is fixedly connected to the rear side of the rotating shaft (8), and the scraper (12) is in sliding contact with the inner wall of the mixing barrel (1); A turntable (13) is fixedly sleeved on the outside of the rotating shaft (8); a motor (14) is fixedly connected to the top of the mixing barrel (1); an output shaft of the motor (14) is fixedly connected to a bevel gear (15); a bevel gear ring (16) is provided on the front side of the bevel gear (15) and is meshed with the bevel gear ring (16); and the bevel gear ring (16) is fixedly connected to the top of the turntable (13); An auxiliary component for controlling the continuous up and down movement of the stirring rod 2 (10); The swing assembly is provided in two and is used to make the mixing barrel (1) swing back and forth with two connecting rods (7) as rotation axes.

4. The device for preparing a thermally conductive adhesive according to claim 3, characterized in that: A feeding hopper (17) is fixedly embedded in the top of the mixing barrel (1), a discharge pipe (18) is fixedly embedded in one side of the mixing barrel (1), and a switch valve (19) is provided on the discharge pipe (18).

5. The device for preparing a thermally conductive adhesive according to claim 3, characterized in that: The auxiliary component includes a shell (20), the shell (20) is fixedly connected to the top of the turntable (13), a reciprocating screw (21) is embedded in the turntable (13), the top of the reciprocating screw (21) is connected to the inner wall of the top of the shell (20), the outer sleeve of the reciprocating screw (21) is provided with a sliding seat (22), the sliding seat (22) and the reciprocating screw (21) are connected through a ball screw pair, the outer sleeve of the bottom end of the reciprocating screw (21) is provided with a first gear (23), the first gear (23) and the reciprocating screw (21) are connected through a one-way bearing, the top of the mixing barrel (1) is fixedly connected with a first gear ring (24), the first gear (23) and the first gear ring (24) are meshed and connected, and the reciprocating screw (21) is connected to the turntable (13) and the shell (20) through bearings.

6. The device for preparing thermally conductive adhesive according to claim 5, characterized in that: The rotating shaft (8) is set to be hollow, and a slider (25) is provided inside the rotating shaft (8) for sliding. The bottom end of the slider (25) is fixedly connected to a magnetic block (26). The front and rear sides of the magnetic block (26) are provided with iron blocks (27) that are attracted to the magnetic block. The two iron blocks (27) are fixedly embedded on the stirring rod (10). The rotating shaft (8) is fixedly connected to a stabilizing block (28). A pull rod (29) is fixedly connected between the sliding seat (22) and the slider (25). The pull rod (29) passes through the stabilizing block (28) and is in sliding contact with the same. Limiting rods (30) are fixedly connected to both sides of the rotating shaft (8). The two limiting rods (30) pass through the stirring rod (10) and are in sliding contact with the same.

7. The device for preparing a thermally conductive adhesive according to claim 3, characterized in that: The swing assembly includes a connecting plate (31), the connecting plate (31) is fixedly connected to one side of the mixing barrel (1), the top of the connecting plate (31) and the top of the mixing barrel (1) are fixedly connected to a support block (32), and a reciprocating screw 2 (33) is embedded on the two support blocks (32), and a sliding seat 2 (34) is provided on the outside of the reciprocating screw 2 (33), and the sliding seat 2 (34) is connected to the reciprocating screw 2 (33) through a ball screw pair, and a bevel gear 2 (35) is provided on the outside of one end of the reciprocating screw 2 (33), and the bevel gear 2 (35) is connected to the reciprocating screw 2 (33) through a one-way bearing, and the bevel gear 2 (35) is meshed with the bevel gear ring (16), and the reciprocating screw 2 (33) is connected to the support block (32) through a bearing.

8. The device for preparing thermally conductive adhesive according to claim 7, characterized in that: The top of the connecting plate (31) is fixedly connected to a box body (36), one side of the box body (36) is set to be open, a piston (37) is slidably provided inside the box body (36), a moving rod (38) is fixedly connected between the piston (37) and the sliding seat (34), the bottom of the connecting plate (31) is provided with a box body (39), a through groove is opened on the box body (39), a piston (40) is slidably provided inside the box body (39), and a push rod (41) is fixedly connected to the piston (40). The push rod (41) passes through the through slot and is in sliding contact with the through slot. The push rod (41) is movably connected to the mixing barrel (1) via a rotating shaft. The second box (39) is movably connected to the outer frame (2) via a rotating shaft. A hose (42) is fixedly connected between the second box (39) and the first box (36). Two swing rods (43) are fixedly connected to the bottom of the outer frame (2). The front and rear sides of the outer shell (5) are fixedly connected to arc rods (44). The two arc rods (44) pass through the swing rod (43) and are in sliding contact with it.

9. The device for preparing a thermally conductive adhesive according to claim 3, characterized in that: The rotating shaft 1 (8) is connected to the mixing barrel (1) via a sealed bearing.

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