Production process of conductive adhesive for binding

Abstract

The invention discloses a production process of a conductive adhesive for binding, and relates to the technical field of conductive adhesive production mixing, the production process of the conductive adhesive for binding comprises the following steps: preparing metal particles, weighing 80-85 parts by weight of metal particles, the metal particles being one or more of graphene, carbon fiber and graphite powder; weighing raw materials of the adhesive, namely weighing the raw materials of the adhesive in parts by weight; in the process of mixing metal particles and an adhesive by using stirring and mixing equipment, through cooperation of the mixing and dispersing assembly, the first control assembly, the second control assembly, the transmission assembly and other parts, it can be ensured that conductive particles are evenly distributed in an adhesive matrix, the sedimentation phenomenon is avoided, the mixing effect is ensured, and the service life of the conductive particles is prolonged. And in the mixing process, according to different mixing stages, the double-spiral belt and the dispersion disc are controlled to operate at different rotating speeds and different rotating speed differences, so that different mixing and stirring requirements are met, the overall uniformity of the sizing material is ensured, and a stable state is provided for subsequent procedures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conductive glue production mixing, in particular to a conductive glue production process for binding. BACKGROUND

[0002] The conductive glue for binding is a special adhesive with both conductive performance and bonding function, mainly used for precise connection and fixation (i.e. "binding") of electronic devices, circuit components, etc., and its core characteristics are to realize conductive path through adding conductive fillers (such as silver powder, copper powder, etc.) and to form firm bonding by relying on the curing reaction of the main adhesive (such as epoxy resin, silicone, etc.), which can replace the traditional welding process, is suitable for miniaturization and high-density electronic packaging scenarios (such as binding of chips and substrates, connection of flexible circuit boards, etc.), can avoid damage to sensitive elements caused by high-temperature welding, and has advantages of reliable connection and simple process, etc.

[0003] In the production process of the conductive glue for binding, stirring and mixing equipment is needed to mix the materials, and in the mixing process, the conductive glue for binding usually contains silver powder, copper powder and other conductive fillers, which are prone to agglomerate together due to surface energy and other factors during mixing, affecting the conductive performance. The density of the conductive filler is usually much larger than that of the adhesive matrix, and in the process of stirring and mixing, sedimentation phenomenon is easy to occur, affecting the mixing effect and further reducing the production and processing quality of the conductive glue for binding. Therefore, we propose a conductive glue production process for binding. SUMMARY

[0004] The present application aims to provide a conductive glue production process for binding to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a conductive glue production process for binding, comprising the following steps: S1: metal particle preparation, 80-85 parts of metal particles are weighed according to weight, the metal particles are one or more of graphene, carbon fiber and graphite powder; S2: adhesive raw material weighing, according to weight, 45-55 parts of epoxy resin containing three or more epoxy functional groups, 5-15 parts of polyamide-amine dendritic polymer, 5-25 parts of curing agent, 1 part of catalyst and 19-29 parts of organic solvent are weighed, the curing agent is at least one of 4,4-diamino diphenyl sulfone and methyl nadic anhydride, and the catalyst is at least one of 2-ethyl-4-methyl imidazole and 1-cyanoethyl-2-ethyl-4-methyl imidazole; S3: adhesive preparation, the epoxy resin, polyamide-amine dendritic polymer, curing agent, catalyst and organic solvent weighed in S2 are mixed and stirred uniformly to prepare an adhesive, and the total weight of the adhesive is 15-20 parts. S4: mixing and stirring, placing the metal particles weighed in S1 and the adhesive prepared in S3 in a stirring and mixing device, mixing for 5-10 min, so that the metal particles are uniformly dispersed in the adhesive to form a conductive adhesive mixture; The stirring and mixing device in step S2 comprises a mixing cylinder, feed pipes and discharge pipes are arranged at the upper and lower ends of the mixing cylinder respectively, control valves for start-stop control are arranged on the feed pipes and discharge pipes, and a mixing and dispersing assembly for mixing and dispersing is arranged in the mixing cylinder.

[0006] Preferably, the mixing and dispersing assembly comprises a mounting shaft rotatably connected to the inside of the mixing cylinder, a dispersing disc is fixed to one end of the mounting shaft, a mounting ring is arranged in the inside of the mixing cylinder, a double helical belt for preventing sedimentation during mixing and dispersing is fixed to the mounting ring, the double helical belt is composed of two groups of helical belts, the two groups of helical belts are oppositely arranged in terms of rotation direction, a rotating assembly for rotating the double helical belt is arranged in the inside of the mixing cylinder, first and second control assemblies for controlling the rotation of the double helical belt and the dispersing disc at different speeds are arranged in the inside of the mixing cylinder, a transmission assembly and a lifting assembly for start-stop control of the first and second control assemblies are arranged in the inside of the mixing cylinder, and a linkage assembly for auxiliary linkage between the lifting assembly and the mounting ring is arranged.

[0007] Preferably, the rotating assembly comprises an annular seat fixed to the inside of the mixing cylinder, a mounting sleeve is rotatably connected to the inside of the annular seat, the mounting ring is arranged on the outside of the mounting sleeve, the mounting ring is arranged below the annular seat, and a connecting assembly for auxiliary connection transmission is arranged between the mounting ring and the mounting sleeve. By adopting the above technical scheme, in the process of rotating the mounting sleeve, the mounting ring and the double helical belt on the mounting ring are driven to rotate through the connection and transmission effect of the multiple groups of sliding pins and connecting grooves.

[0008] Preferably, the connecting assembly comprises multiple groups of connecting grooves opened in the inside of the mounting ring, each group of connecting grooves is arranged in a ring array state on the mounting ring, sliding pins are slidably connected to the connecting grooves, and the sliding pins are fixed to the outside of the mounting sleeve. By adopting the above technical scheme, the mounting ring can be driven to rotate while the mounting sleeve is rotating, and the mounting ring can relatively slide with the mounting sleeve in the axial direction through the connection effect of the multiple groups of connecting grooves and sliding pins.

[0009] Preferably, the first control assembly comprises a first spline barrel, a first gear fixed on the outside of the first spline barrel, a first gear ring fixed on the inside of the mounting sleeve, a second gear fixed on the mounting shaft, the first gear being located between the first gear ring and the second gear and being arranged in meshing with each other, and the tooth number ratio of the first gear, the second gear and the first gear ring being 1:6:8. By adopting the above technical scheme, the dispersing disc and the double helical belt rotate at a lower speed, and the speed of the double helical belt is lower than that of the dispersing disc.

[0010] Preferably, the second control assembly is located above the first control assembly, the second control assembly comprises a second spline barrel, the first spline barrel and the second spline barrel are arranged concentrically, a third gear is fixed on the outside of the second spline barrel, a second gear ring is fixed on the inside of the mounting sleeve, a fourth gear is fixed on the mounting shaft, the third gear is located between the second gear ring and the fourth gear and is arranged in meshing with each other, the tooth number ratio of the third gear, the fourth gear and the second gear ring is 6:1:60, and the inside of the mixing barrel is provided with a support assembly for assisting the installation and support of the first spline barrel and the second spline barrel. By adopting the above technical scheme, when the spline shaft rotates at the same speed, the dispersing disc rotates at a higher speed and the double helical belt rotates at a lower speed.

[0011] Preferably, the transmission assembly comprises a transmission shaft arranged on the inside of the first spline barrel and the second spline barrel, a spline shaft is fixed on the end of the transmission shaft and is used for connecting and transmitting the first spline barrel and the second spline barrel, an installation frame is installed in the inside of the mixing barrel, and a driving motor for driving the transmission shaft is installed on the installation frame. By adopting the above technical scheme, the first spline barrel or the second spline barrel can be driven to rotate respectively.

[0012] Preferably, the lifting assembly comprises a connecting rod fixed on the upper end of the installation frame, a cylinder for assisting the lifting of the connecting rod is installed on the end of the mixing barrel, and one end of the connecting rod is fixedly connected with the output end of the cylinder. By adopting the above technical scheme, the installation frame can be conveniently lifted.

[0013] Preferably, the linkage assembly comprises a plurality of linkage rods slidingly connected to the annular seat, a linkage plate is fixed on the connecting rod, one end of the linkage rod is fixed with the linkage plate, an annular plate is rotatably connected above the installation ring, and the other end of the linkage rod is fixed with the annular plate. By adopting the above technical scheme, in the process of lifting the connecting rod, the installation ring and the double helical belt on the installation ring are driven to move up and down synchronously through the connection of the linkage plate, the linkage rod and the annular plate.

[0014] Preferably, the support assembly comprises a rotating ring outside the first spline barrel and the second spline barrel in a sleeved state, an inner wall of the mixing barrel is provided with a support frame, and the support frame and the rotating ring are connected and fixed through a connecting plate. By adopting the above technical scheme, the first spline barrel and the second spline barrel can be supported and connected.

[0015] Compared with the prior art, the present application has the following advantages: In the process of mixing metal particles and adhesive by the stirring and mixing equipment, through cooperation of the mixing and dispersing assembly, the first control assembly, the second control assembly and the transmission assembly, the conductive particles can be uniformly distributed in the adhesive matrix, and the settling phenomenon can be avoided, the mixing effect is ensured, and in the mixing process, the double helical belt and the dispersing disc are controlled to work at different rotating speeds and different rotating speed differences according to different mixing stages, different mixing and stirring requirements are adapted, the overall uniformity of the glue is ensured, and a stable state is provided for subsequent processes. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a process flow diagram of the present application; Figure 2 It is a structure diagram of the stirring and mixing equipment of the present application; Figure 3 It is a structure diagram of the bottom of the mixing barrel of the present application; Figure 4 It is a structure diagram of the inside of the mixing barrel of the present application; Figure 5 It is a structure diagram of the mixing and dispersing assembly of the present application; Figure 6 It is a structure diagram of the first control assembly of the present application; Figure 7 It is a structure diagram of the connecting assembly of the present application; Figure 8 It is a structure diagram of the second control assembly, the transmission assembly and the lifting assembly of the present application; Figure 9 It is a structure diagram of the support assembly of the present application; Figure 10 It is a structure diagram of the linkage assembly of the present application; Figure 11 It is a diagram of different transmission states between the first control assembly and the second control assembly of the present application.

[0017] In the figure: 101, mixing cylinder; 102, feed pipe; 103, discharge pipe; 104, control valve; 201, mounting shaft; 202, dispersion disc; 203, mounting ring; 204, double helical belt; 301, annular seat; 302, mounting sleeve; 401, connecting groove; 402, sliding pin; 501, first spline cylinder; 502, first gear; 503, first gear ring; 504, second gear; 601, second spline cylinder; 602, third gear; 603, second gear ring; 604, fourth gear; 701, transmission shaft; 702, spline shaft; 703, mounting frame; 704, drive motor; 801, air cylinder; 802, connecting rod; 901, linkage rod; 902, linkage plate; 903, annular plate; 1001, rotating ring; 1002, support frame; 1003, connecting plate. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0019] Embodiment 1: Please refer to Figure 1 , a production process of conductive adhesive for binding, comprising the following steps: S1: metal particle preparation, 80-85 parts by weight of metal particles are weighed, the metal particles are one or more of graphene, carbon fiber and graphite powder; S2: adhesive raw material weighing, 45-55 parts by weight of adhesive raw material, 5-15 parts by weight of polyamide-amine dendrimer, 5-25 parts by weight of curing agent, 1 part by weight of catalyst and 19-29 parts by weight of organic solvent are weighed, the curing agent is at least one of 4,4-diamino diphenyl sulfone and methyl nadic anhydride, and the catalyst is at least one of 2-ethyl-4-methyl imidazole and 1-cyanoethyl-2-ethyl-4-methyl imidazole; S3: adhesive preparation, the epoxy resin, polyamide-amine dendrimer, curing agent, catalyst and organic solvent weighed in S2 are mixed and uniformly stirred to prepare an adhesive, and the total weight of the adhesive is 15-20 parts; S4: mixing and stirring, the metal particles weighed in S1 and the adhesive prepared in S3 are placed in a stirring and mixing device, mixed for 5-10 min, so that the metal particles are uniformly dispersed in the adhesive to form a conductive adhesive mixture; It should be noted that during the whole operation process, the weighing of raw materials, the mixing ratio and the mixed materials belong to the conventional technical means, and the working principle and operation mode will not be described in detail here.

[0020] Embodiment 2: please refer to Figures 2-11 The stirring and mixing device in step S2 includes a mixing cylinder 101, and the upper and lower ends of the mixing cylinder 101 are respectively provided with a feeding pipe 102 and a discharging pipe 103, and the feeding pipe 102 and the discharging pipe 103 are provided with control valves 104 for start-stop control, and the inside of the mixing cylinder 101 is provided with a mixing and dispersing assembly for mixing and dispersing; The mixing and dispersing assembly includes a mounting shaft 201 rotatably connected to the inside of the mixing cylinder 101, one end of the mounting shaft 201 is fixed with a dispersing disc 202, the inside of the mixing cylinder 101 is provided with a mounting ring 203, the mounting ring 203 is fixed with a double helical belt 204 for anti-settling during mixing and dispersing, the double helical belt 204 is composed of two groups of helical belts, and the two groups of helical belts are oppositely arranged, the inside of the mixing cylinder 101 is provided with a rotating assembly for rotating the double helical belt 204, the inside of the mixing cylinder 101 is provided with a first control assembly and a second control assembly for controlling the rotation of the double helical belt 204 and the dispersing disc 202 at different speeds, the inside of the mixing cylinder 101 is provided with a transmission assembly and a lifting assembly for start-stop control of the first control assembly and the second control assembly, and the lifting assembly and the mounting ring 203 are provided with a linkage assembly for auxiliary linkage; It should be noted that during the mixing process of the stirring and mixing device for the metal particles and the adhesive, the cooperation of the mixing and dispersing assembly, the first control assembly, the second control assembly and the transmission assembly can ensure that the conductive particles are uniformly distributed in the adhesive matrix and avoid settling phenomenon, ensure the mixing effect, and in the mixing process, according to different mixing stages, the double helical belt 204 and the dispersing disc 202 work at different speeds and different speed differences to adapt to different mixing and stirring needs, ensure the overall uniformity of the glue, and provide stable state for the subsequent process.

[0021] Preferably, the rotating assembly includes an annular seat 301 fixed in the inside of the mixing cylinder 101, the inside of the annular seat 301 is rotatably connected with a mounting sleeve 302, the mounting ring 203 is sleeved on the outside of the mounting sleeve 302, the mounting ring 203 is below the annular seat 301, and the mounting ring 203 and the mounting sleeve 302 are provided with a connecting assembly for auxiliary connection transmission; It should be noted that through transmission, the mounting sleeve 302 rotates, and in the process of rotating the mounting sleeve 302, the mounting ring 203 and the double helical belt 204 on the mounting ring 203 are driven to rotate through the connection and transmission effect of the plurality of sliding pins 402 and the connecting grooves 401.

[0022] Preferably, the connecting assembly comprises a plurality of groups of connecting grooves 401 formed in the inner side of the mounting ring 203, and each group of connecting grooves 401 is arranged in a ring array on the mounting ring 203, and a sliding pin 402 is slidably connected on the connecting groove 401, and the sliding pin 402 is fixed to the outer side of the mounting sleeve 302. It should be noted here that through the plurality of groups of connecting grooves 401 and sliding pins 402, the mounting ring 203 can be driven to rotate while the mounting sleeve 302 rotates, and through the connecting action of the plurality of groups of connecting grooves 401 and sliding pins 402, the mounting ring 203 can be relatively slid with the mounting sleeve 302 in the axial direction.

[0023] Preferably, the first control assembly comprises a first spline barrel 501, the outer side of the first spline barrel 501 is fixedly sleeved with a first gear 502, the inner side of the mounting sleeve 302 is fixedly provided with a first gear ring 503, the mounting shaft 201 is fixedly provided with a second gear 504, the first gear 502 is located between the first gear ring 503 and the second gear 504 and is arranged in meshing with each other, and the tooth number ratio of the first gear 502, the second gear 504 and the first gear ring 503 is 1:6:8. It should be noted here that in the transmission process of the rotation of the first gear 502, because the tooth number ratio of the first gear 502, the second gear 504 and the first gear ring 503 is 1:6:8, through the setting of the tooth number ratio and the setting of the initial rotation speed of the first gear 502, the rotating speed of the dispersing disc 202 and the double helical belt 204 is relatively low, and the rotating speed of the double helical belt 204 is less than that of the dispersing disc 202.

[0024] Preferably, the second control assembly is located above the first control assembly, the second control assembly comprises a second spline barrel 601, the first spline barrel 501 and the second spline barrel 601 are arranged concentrically, the outer side of the second spline barrel 601 is fixedly sleeved with a third gear 602, the inner side of the mounting sleeve 302 is fixedly provided with a second gear ring 603, the mounting shaft 201 is fixedly provided with a fourth gear 604, the third gear 602 is located between the second gear ring 603 and the fourth gear 604 and is arranged in meshing with each other, the tooth number ratio of the third gear 602, the fourth gear 604 and the second gear ring 603 is 6:1:60, and the inside of the mixing barrel 101 is provided with a supporting assembly for assisting the installation and support of the first spline barrel 501 and the second spline barrel 601. It should be noted here that: through the lifting assembly, the transmission shaft 701 and the spline shaft 702 move upwards and connect the spline shaft 702 with the second spline barrel 601. After the upward movement, the dispersion disc 202 and the double helical belt 204 are also rotated by the rotating action of the transmission shaft 701 and the spline shaft 702 and the meshing transmission between the third gear 602, the fourth gear 604 and the second gear ring 603. During rotation, the third gear 602, the fourth gear 604 and the second gear ring 603 have a gear ratio of 6:1:60, so that the spline shaft 702 rotates at the same speed, the dispersion disc 202 rotates at high speed, and the double helical belt 204 rotates at low speed.

[0025] Preferably, the transmission assembly comprises a transmission shaft 701 arranged inside the first spline barrel 501 and the second spline barrel 601, and the end of the transmission shaft 701 is fixed with a spline shaft 702 for connecting and transmitting with the first spline barrel 501 and the second spline barrel 601. The inside of the mixing barrel 101 is provided with a mounting frame 703, and the mounting frame 703 is provided with a driving motor 704 for driving the transmission shaft 701; It should be noted here that the spline shaft 702 is respectively inserted and connected to the first spline barrel 501 or the second spline barrel 601, and the transmission of the spline shaft 702 with the first spline barrel 501 or the spline shaft 702 with the second spline barrel 601 can drive the first spline barrel 501 or the second spline barrel 601 to rotate, respectively; It should be noted here that the driving motor 704 is a conventional driving component in the present application, and its working principle and operation mode will not be described here.

[0026] Preferably, the lifting assembly comprises a connecting rod 802 fixed to the upper end of the mounting frame 703, and the end of the mounting frame 703 is provided with a cylinder 801 for assisting the lifting of the connecting rod 802, and one end of the connecting rod 802 is connected and fixed with the output end of the cylinder 801; It should be noted here that the driving action of the cylinder 801 and the connecting action of the connecting rod 802 can facilitate the lifting movement of the mounting frame 703; It should be noted here that the cylinder 801 is a conventional lifting driving component in the present application, and its working principle and operation mode will not be described here.

[0027] Preferably, the linkage assembly comprises a plurality of linkage rods 901 slidingly connected to the annular seat 301, a linkage plate 902 fixed on the connecting rod 802, one end of the linkage rod 901 fixed with the linkage plate 902, an annular plate 903 rotatably connected above the mounting ring 203, and the other end of the linkage rod 901 fixed with the annular plate 903; It should be noted that: in the process of connecting rod 802 lifting, through the linkage plate 902, linkage rod 901 and ring plate 903 connection effect, drive installation ring 203 and installation ring 203 on the double helix belt 204 synchronous lifting movement; It should be noted that: through the rotatable connection of ring plate 903 and installation ring 203, the installation ring 203 rotates without rotating ring plate 903.

[0028] Preferably, the support assembly comprises a rotating ring 1001 rotatably connected to the outside of the first spline barrel 501 and the second spline barrel 601 in a sleeved state, the inner wall of the mixing barrel 101 is provided with a support frame 1002, and the support frame 1002 and the rotating ring 1001 are connected and fixed through a connecting plate 1003. It should be noted that: through the rotating ring 1001, the support frame 1002 and the connecting plate 1003, the first spline barrel 501 and the second spline barrel 601 can be supported and connected.

[0029] In the scheme: in the process of mixing metal particles and adhesive by using the stirring mixing device, the following steps are included: The metal particles and the adhesive are transported to the inside of the mixing cylinder 101 through the feeding pipe 102. After the transportation is completed, the connecting rod 802 is driven to move downward by the air cylinder 801. In the process of the downward movement of the connecting rod 802, the transmission shaft 701 and the spline shaft 702 are simultaneously driven to move downward by the connecting effect of the mounting frame 703. Through the downward movement of the spline shaft 702, the spline shaft 702 is inserted into the inside of the first spline cylinder 501. After the downward movement is completed, the transmission shaft 701 and the spline shaft 702 are driven to rotate by the driving motor 704. In the process of the rotation of the spline shaft 702, the first gear 502 is driven to rotate by the connecting and driving effect of the spline shaft 702 and the first spline cylinder 501. In the process of the rotation of the first gear 502, the mounting shaft 201 and the dispersing disc 202 on the mounting shaft 201 are driven to rotate by the meshing transmission between the first gear 502 and the second gear 504. In the process of the rotation of the first gear 502, the mounting sleeve 302 is driven to rotate by the meshing transmission between the first gear 502 and the first gear ring 503. In the process of the rotation of the mounting sleeve 302, the mounting ring 203 and the double helical belt 204 on the mounting ring 203 are driven to rotate by the connecting and driving effect of the plurality of sliding pins 402 and the connecting grooves 401. Therefore, in the process of the rotation of the spline shaft 702, the dispersing disc 202 and the double helical belt 204 are driven to rotate by the transmission. Through the rotation of the dispersing disc 202 and the double helical belt 204, the effect of mixing the filler is realized. Through the rotation of the dispersing disc 202, strong shearing force and impact force can be generated to break the agglomerated conductive filler into single particles or smaller agglomerates in the mixing process, to ensure the uniform distribution of the conductive particles in the adhesive matrix and to improve the conductivity of the conductive adhesive. The materials in the stagnant area at the bottom of the mixing cylinder 101 are pushed to the center of the mixing cylinder 101 by the rotation of the double helical belt 204, and the upper materials are turned downward, to realize the overall circulation and mixing of the materials in the whole mixing cylinder 101, to avoid the sedimentation phenomenon and to ensure the mixing effect, and to further reduce the production and processing quality of the binding conductive adhesive. In the process of the rotation of the first gear 502, because the tooth number ratio of the first gear 502, the second gear 504 and the first gear ring 503 is 1:6:8, through the setting of the tooth number ratio and the initial rotation speed of the first gear 502, the dispersion disc 202 and the double helix belt 204 rotate at a low speed, and the rotation speed of the double helix belt 204 is less than that of the dispersion disc 202. The dispersion disc 202 and the double helix belt 204 rotate at a low speed, which is suitable for the characteristics of high viscosity and easy agglomeration of the initial material, avoids the splashing of the material, the large amount of air bubbles being rolled in and the overloading of the equipment caused by the too high rotation speed, and the rotation speed of the double helix belt 204 is less than that of the dispersion disc 202, because the double helix belt 204 focuses on macroscopically driving the circulation of high-viscosity materials, low rotation speed can reduce resistance and energy consumption, and slightly high rotation speed of the dispersion disc 202 can preliminarily crush the agglomerates. The cooperation of the two can solve the problems of difficult stirring of high-viscosity materials, difficult dispersion of agglomerates, material stratification and air bubble mixing, and create conditions for subsequent efficient stirring. After the initial stirring, through the lifting assembly, the transmission shaft 701 and the spline shaft 702 move upwards and the spline shaft 702 is connected with the second spline barrel 601. After the upward movement, the rotation of the transmission shaft 701 and the spline shaft 702 and the meshing transmission between the third gear 602, the fourth gear 604 and the second gear ring 603 also make the dispersion disc 202 and the double helix belt 204 rotate. In the process of rotation, because the tooth number ratio of the third gear 602, the fourth gear 604 and the second gear ring 603 is 6:1:60, when the spline shaft 702 rotates at the same speed, the dispersion disc 202 accelerates and the double helix belt 204 decelerates. The high-speed rotation of the dispersion disc 202 can shorten the dispersion time and avoid the aging of the adhesive matrix caused by long-time stirring. At the same time, through strong turbulence, the local viscosity of the material is further reduced, creating more optimal conditions for subsequent mixing. In the process of high-speed mixing, the material flowability is good, the decelerated double helix belt 204 can be pushed through gentle circulation to prevent material splashing or excessive air entrainment caused by high-speed stirring, while maintaining the overall uniformity of the whole tank material, avoiding stratification and ensuring the mixing effect of processing; In the process of the connecting rod 802 descending in the early stage of stirring and mixing, through the connecting action of the linkage plate 902, the linkage rod 901 and the annular plate 903, the mounting ring 203 and the double helical belt 204 on the mounting ring 203 are driven to move downward synchronously, through the downward movement of the double helical belt 204, the lower end of the double helical belt 204 is closer to the bottom of the mixing cylinder 101, in the early stage of stirring, the metal particles and the adhesive are prone to sink to the bottom of the tank due to the large density, the double helical belt 204 close to the bottom can directly act on the deposited material, through the pushing force close to the bottom of the mixing cylinder 101, the high-viscosity material prone to stay at the bottom is turned up, so that it participates in the circulation, solves the problem of material deposition and stirring dead angle at the bottom, avoids the uneven composition caused by the insufficient mixing of the material at the bottom, and in the process of the connecting rod 802 rising in the late stage of stirring and mixing, the mounting ring 203 and the double helical belt 204 on the mounting ring 203 are driven to move upward synchronously, in the late stage of stirring, the material viscosity is reduced, the fluidity is improved, and the conductive filler is preliminarily dispersed, at this time, the double helical belt 204 is lifted to expand the stirring range and cover the upper area of the mixing cylinder 101, through the gentle circulation and pushing, the overall mixing of the material in the mixing cylinder 101 is promoted, the problems of concentration difference and uneven composition of the material in the upper and lower parts are solved, at the same time, far away from the bottom can reduce the excessive stirring of the dispersed material at the bottom, avoid the secondary agglomeration of the conductive particles or the involvement of air to generate bubbles, ensure the overall uniformity of the rubber compound, and provide a stable state for the subsequent process.

[0030] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A process for producing a conductive adhesive for bonding, characterized by, It comprises the following steps: S1: metal particle preparation, 80-85 parts of metal particles are weighed by weight, the metal particles are one or more of graphene, carbon fiber and graphite powder; S2: adhesive raw material weighing, by weight, 45-55 parts of epoxy resin containing three or more epoxy functional groups, 5-15 parts of polyamide-amine dendrimer, 5-25 parts of curing agent, 1 part of catalyst and 19-29 parts of organic solvent are weighed, the curing agent is at least one of 4, 4-diamino diphenyl sulfone and methyl nadic anhydride, and the catalyst is at least one of 2-ethyl-4-methyl imidazole and 1-cyanoethyl-2-ethyl-4-methyl imidazole; S3: adhesive preparation, the epoxy resin, polyamide-amine dendrimer, curing agent, catalyst and organic solvent weighed in S2 are mixed and stirred uniformly to prepare an adhesive, and the total weight of the adhesive is 15-20 parts; S4: mixing and stirring, the metal particles weighed in S1 and the adhesive prepared in S3 are placed in a stirring and mixing device to mix for 5-10 min, so that the metal particles are uniformly dispersed in the adhesive to form a conductive adhesive mixture; The stirring and mixing device in step S2 comprises a mixing cylinder (101), the upper and lower ends of the mixing cylinder (101) are respectively provided with a feeding pipe (102) and a discharging pipe (103), the feeding pipe (102) and the discharging pipe (103) are provided with control valves (104) for start-stop control, and the inside of the mixing cylinder (101) is provided with a mixing and dispersing assembly for mixing and dispersing.

2. The process for producing conductive adhesive for bonding according to claim 1, wherein: The mixing and dispersing assembly comprises a mounting shaft (201) rotatably connected to the inside of the mixing cylinder (101), one end of the mounting shaft (201) is fixed with a dispersing disc (202), the inside of the mixing cylinder (101) is provided with a mounting ring (203), the mounting ring (203) is fixed with a double helical belt (204) for anti-settling during mixing and dispersing, the double helical belt (204) is composed of two groups of helical belts, and the two groups of helical belts are oppositely arranged, the inside of the mixing cylinder (101) is provided with a rotating assembly for rotating the double helical belt (204), the inside of the mixing cylinder (101) is provided with a first control assembly and a second control assembly for rotating control between the double helical belt (204) and the dispersing disc (202) at different speeds, the inside of the mixing cylinder (101) is provided with a transmission assembly and a lifting assembly for start-stop control of the first control assembly and the second control assembly, and the lifting assembly and the mounting ring (203) are provided with a linkage assembly for auxiliary linkage.

3. The process for producing conductive adhesive for bonding according to claim 2, wherein: The rotating assembly comprises an annular seat (301) fixed to the inside of the mixing cylinder (101), the inside of the annular seat (301) is rotatably connected with a mounting sleeve (302), the mounting ring (203) is sleeved on the outside of the mounting sleeve (302), the mounting ring (203) is below the annular seat (301), and the mounting ring (203) and the mounting sleeve (302) are provided with a connecting assembly for auxiliary connection transmission.

4. The process for producing conductive adhesive for bonding according to claim 3, wherein: The connecting assembly comprises a plurality of groups of connecting grooves (401) formed in the inner side of the mounting ring (203), and each group of connecting grooves (401) is arranged in a ring array on the mounting ring (203), the sliding pin (402) is slidably connected to the connecting groove (401), and the sliding pin (402) is fixed to the outer side of the mounting sleeve (302).

5. The process for producing an electrically conductive adhesive for bonding according to claim 4, characterized in that: The first control assembly comprises a first spline barrel (501), a first gear (502) is fixedly sleeved on the outer side of the first spline barrel (501), a first gear ring (503) is fixedly arranged on the inner side of the mounting sleeve (302), a second gear (504) is fixedly arranged on the mounting shaft (201), the first gear (502) is arranged between the first gear ring (503) and the second gear (504) and is in meshing connection, and the tooth number ratio of the first gear (502), the second gear (504) and the first gear ring (503) is 1:6:

8.

6. The process for producing an electrically conductive adhesive for bonding according to claim 5, characterized in that: The second control assembly is located above the first control assembly, the second control assembly comprises a second spline barrel (601), the first spline barrel (501) and the second spline barrel (601) are arranged in a concentric manner, a third gear (602) is fixedly sleeved on the outer side of the second spline barrel (601), a second gear ring (603) is fixedly arranged on the inner side of the mounting sleeve (302), a fourth gear (604) is fixedly arranged on the mounting shaft (201), the third gear (602) is arranged between the second gear ring (603) and the fourth gear (604) and is in meshing connection, the tooth number ratio of the third gear (602), the fourth gear (604) and the second gear ring (603) is 6:1:60, and the inside of the mixing barrel (101) is provided with a support assembly for assisting installation and support of the first spline barrel (501) and the second spline barrel (601).

7. The process for producing an electrically conductive adhesive for bonding according to claim 6, characterized in that: The transmission assembly comprises a transmission shaft (701) arranged in the inner side of the first spline barrel (501) and the second spline barrel (601), a spline shaft (702) for connecting and transmitting the first spline barrel (501) and the second spline barrel (601) is fixed to the end of the transmission shaft (701), an installation frame (703) is installed in the inside of the mixing barrel (101), and a driving motor (704) for driving the transmission shaft (701) is installed on the installation frame (703).

8. The process for producing an electrically conductive adhesive for bonding according to claim 7, characterized in that: The lifting assembly comprises a connecting rod (802) fixed to the upper end of the installation frame (703), a cylinder (801) for assisting lifting of the connecting rod (802) is installed at the end of the mixing barrel (101), and one end of the connecting rod (802) is fixedly connected to the output end of the cylinder (801).

9. The process for producing an electrically conductive adhesive for bonding according to claim 8, wherein: The linkage assembly comprises a plurality of groups of linkage rods (901) slidably connected to the annular seat (301), a linkage plate (902) is fixed to the connecting rod (802), one end of the linkage rod (901) is fixed to the linkage plate (902), and the other end of the linkage rod (901) is fixed to the annular plate (903) rotatably connected above the mounting ring (203).

10. The process for producing an electrically conductive adhesive for bonding according to claim 6, wherein: The support assembly comprises a rotating ring (1001) rotatably connected to the outer side of the first spline barrel (501) and the second spline barrel (601) in a sleeved state, an inner wall of the mixing barrel (101) is provided with a support frame (1002), and the support frame (1002) and the rotating ring (1001) are connected and fixed through a connecting plate (1003).

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