A preparation device and preparation process of zinc oxide whiskers

Abstract

The present invention belongs to the field of material preparation technology, and in particular relates to a zinc oxide whisker preparation device and preparation process, comprising a base, a high-temperature heating mechanism, a material support rotation mechanism, a multi-stage feeding mechanism, a material mixing and feeding mechanism, a feeding control mechanism, and a PLC controller. The present invention can accurately control the amount of zinc oxide whiskers prepared based on production needs, and synchronously adjust the amount of additives based on the amount of raw materials used. It can automatically determine whether a dispersant needs to be added and the amount of dispersant added based on the amount of raw materials used. It can also cause the reaction container to continuously move and rotate during the zinc oxide whisker preparation process. The rotation can cause the material in the container to continuously change position, more evenly absorb heat, reduce temperature gradients, and help obtain more uniform reaction products and better molding quality.

Description

Technical Field

[0001] The invention belongs to the technical field of material preparation, and in particular relates to a preparation device and a preparation process of zinc oxide whiskers. Background Art

[0002] Zinc oxide whiskers are a type of zinc oxide crystal form with special properties and structure, mainly including four-needle zinc oxide whiskers. The specific steps for preparing zinc oxide whiskers by the solid-state reaction method are to evenly mix zinc compounds and additives (such as borates, halides, etc.) in a certain proportion. The amount of additives added is generally 1%-10% of the raw material mass. The mixed raw materials are then placed in a high-temperature furnace and reacted at 800-1000°C for several hours. During the reaction process, the raw materials undergo a solid-state reaction under the catalytic action of the additives to form zinc oxide whiskers.

[0003] During the solid-state reaction process, zinc oxide whiskers tend to agglomerate together, affecting their dispersibility and performance. This is due to the charge imbalance on the whisker surface, van der Waals forces, and other effects during the reaction process. At this time, a dispersant needs to be added. The dispersant can be adsorbed on the whisker surface, reducing surface energy and reducing agglomeration. However, in solid-state reactions at low temperatures and low reaction rates, the surface charge distribution of the generated zinc oxide whiskers is uniform, and there is no electrostatic attraction between the particles. At the same time, the whiskers grow slowly and have enough time to disperse naturally in the reaction vessel. In this case, no dispersant is needed. If a dispersant is added blindly, additional impurities will be introduced because the dispersant itself is a foreign substance. The additional dispersant will remain in the zinc oxide whisker product, which will affect the electrical properties and stability of the product when used in subsequent fields such as electronic materials with high purity requirements. Moreover, these additional impurities will interfere with the results when the whiskers are chemically analyzed or used in some high-precision experimental studies. Summary of the Invention

[0004] The object of the present invention is to provide a device and a process for preparing zinc oxide whiskers in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical solution: a device for preparing zinc oxide whiskers, comprising a base and further comprising:

[0006] A high-temperature heating mechanism is fixedly mounted on one side of the upper end of the base;

[0007] A material support rotation mechanism is installed in the high-temperature heating mechanism;

[0008] A multi-stage feeding mechanism is fixedly mounted on the upper end of the base;

[0009] A mixing and feeding mechanism is fixedly mounted on the upper end of the base and is arranged corresponding to the position of the multi-stage feeding mechanism;

[0010] A feeding control mechanism, fixedly mounted on the multi-stage feeding mechanism;

[0011] The PLC controller is fixedly mounted on the upper end of the base and is electrically connected to the high-temperature heating mechanism, the material supporting rotation mechanism, the multi-stage feeding mechanism, the material mixing and feeding mechanism and the feeding control mechanism.

[0012] In the above-mentioned device for preparing zinc oxide whiskers, the high-temperature heating mechanism includes a lower support shell fixedly mounted on the upper end of the base, an L-shaped support plate fixedly mounted on the rear side of the upper end of the base, and two electric push rods symmetrically fixedly inserted into the horizontal part of the L-shaped support plate. The lower movable ends of the two electric push rods are fixedly connected to the same resistance heating box, and a plurality of positioning rods are fixedly connected to the lower end of the resistance heating box at equal distances. The upper end of the lower support shell is provided with a plurality of positioning sockets that match the positioning rods.

[0013] In the above-mentioned device for preparing zinc oxide whiskers, the material support rotation mechanism includes a heat-insulating circular plate that is sealed and rotatably sleeved in the lower support shell, and a rotating motor is fixedly installed on the bottom of the inner wall of the lower support shell. The upper output end of the rotating motor is fixedly connected to the center of the lower end of the heat-insulating circular plate. The surface of the heat-insulating circular plate is evenly provided with a plurality of through holes distributed in an annular shape, and a transmission shaft is rotatably sleeved in the corresponding through holes through a high-temperature resistant bearing. The upper end of the transmission shaft is fixedly connected to a reaction container, and the lower end of the transmission shaft is fixedly connected to a transmission gear. The bottom of the inner wall of the lower support shell is fixedly provided with an annular inner rack that is meshed with multiple transmission gears.

[0014] In the above-mentioned device for preparing zinc oxide whiskers, the multi-stage feeding mechanism includes a column rotatably connected to the upper end of the base, the upper end of the base is fixedly provided with a motor rotating assembly for driving the column to rotate, the upper end of the column is fixedly connected to a support plate, the upper end of the support plate is fixedly provided with a raw material storage tank, an additive storage tank and a dispersant storage tank in sequence, and the tank walls of the raw material storage tank, the additive storage tank and the dispersant storage tank are all provided with a feeding pipe, the lower end of the feeding pipe passes through the lower end of the support plate, and a feeding pump is provided on the feeding pipe, and the feeding pump is fixedly provided on the upper end of the support plate.

[0015] In the above-mentioned zinc oxide whisker preparation device, the mixing and feeding mechanism includes an electric slide rail fixedly mounted on the upper end of the base, the upper end of the slider in the electric slide rail is fixedly connected to an electric lifting rod, the upper movable end of the electric lifting rod is fixedly connected to an L-shaped fixed plate, the side wall of the L-shaped fixed plate is fixedly mounted with a flip motor, the output end of the flip motor passes through the side wall of the L-shaped fixed plate, and is fixedly connected to a mixing box through a U-shaped bracket, the upper side of the mixing box is fixedly connected to a feed pipe, an electrically controlled on-off valve is mounted on the feed pipe, a plurality of jacks are provided on opposite sides of the mixing box, and There is a reciprocating rod with a movable sleeve in the corresponding socket, and one end of the multiple reciprocating rods located in the mixing box is fixedly connected to the same dispersion mesh plate, and an elastic sealing gasket is connected between the inner wall of the mixing box and the end side wall of the dispersion mesh plate. The ends of the multiple reciprocating rods located on the same side outside the mixing box are fixedly connected to the same reciprocating plate, and the reciprocating plate and the mixing box are fixedly connected on the opposite side to multiple return springs sleeved on the outside of the reciprocating rod. A rotating shaft is rotatably connected in the U-shaped bracket, and a driving motor for driving the rotating shaft to rotate is fixedly installed on the outer wall of the U-shaped bracket, and the shaft wall of the rotating shaft is fixedly sleeved with a cam located on one side of the reciprocating plate.

[0016] In the above-mentioned zinc oxide whisker preparation device, the feeding control mechanism includes a control shell, the inner wall of the control shell is rotatably connected to a control screw, the outer wall of the control shell is fixedly provided with a servo motor for driving the control screw to rotate, the rod wall of the control screw is threadedly sleeved with a movable plate, the side wall of the movable plate is fixedly provided with a pressure switch, the inner wall of the control shell is also rotatably connected to a forward and reverse screw arranged parallel to the control screw, the outer wall of the control shell is fixedly provided with a forward and reverse motor for driving the forward and reverse screw to rotate, the rod wall of the forward and reverse screw is threadedly sleeved with a pressing plate, the pressing plate is located on one side of the pressure switch, and a dispersant addition confirmation mechanism is also provided on the top of the inner wall of the control shell.

[0017] In the above-mentioned zinc oxide whisker preparation device, the dispersant addition confirmation mechanism includes two side plates symmetrically fixedly connected to the top of the inner wall of the control shell, an adjustment resistor rod is fixedly connected between the two side plates, and multiple guide slides arranged side by side are also fixedly connected between the two side plates. The multiple guide slides are externally slidably sleeved with the same sliding seat, and multiple compensation springs sleeved on the outside of the guide slide are fixedly connected between the sliding seat and one of the side plates. The side wall of the sliding seat is provided with a sleeve hole sleeved on the outside of the adjustment resistor rod, and the inner wall of the corresponding sleeve hole is fixedly connected with an adjustment conductive contact electrically in contact with the adjustment resistor rod, an electric connecting strip is fixedly installed on the top of the inner wall of the control shell, and a conductive block is fixedly connected to the upper end of the sliding seat.

[0018] In the above-mentioned zinc oxide whisker preparation device, the outer walls of the movable plate and the pressing plate are fixedly connected to the limit slider, and the inner wall of the control shell is provided with a limit sliding groove that matches and slides with the limit slider.

[0019] A process for preparing zinc oxide whiskers comprises the following steps:

[0020] S1. By setting up a multi-stage feeding mechanism and a feeding control mechanism, the amount of zinc oxide whiskers prepared is precisely controlled based on production needs, and the amount of additives is adjusted synchronously based on the amount of raw materials used;

[0021] S2. By setting the dispersant addition confirmation mechanism, the amount of raw materials based on the amount of dispersant automatically determines whether the dispersant needs to be added and the amount of dispersant added;

[0022] S3. By setting the mixing and feeding mechanism, the raw materials, additives and dispersants can be well mixed, thereby allowing the reactants to be fully mixed and contacted, increasing the reaction rate, and automatically controlling the mixing time based on the amount of material used to ensure complete mixing;

[0023] S4. The material rotation mechanism is set up to make the material change its position continuously, receive heat more evenly, reduce temperature gradient, and help obtain more uniform reaction products and better molding quality.

[0024] Compared with the existing technology, the beneficial effects of the present invention are:

[0025] 1. By setting up a multi-stage feeding mechanism and a feeding control mechanism, the preparation amount of zinc oxide whiskers can be accurately controlled based on production needs, and the amount of additives can be synchronously adjusted based on the amount of raw materials used, so that the more raw materials are used, the more additives are used, so that the ratio of the amount of additives to the amount of raw materials is 6%. Because when zinc oxide whiskers are prepared by the solid-state reaction method, the role of additives is mainly to promote the growth of whiskers, control the morphology of whiskers and improve the reaction process. When the reaction raw materials (such as zinc compounds) increase, more additives are needed from the perspective of promoting the reaction and maintaining the effectiveness of additives. When the amount of reaction raw materials increases, in order to enable the reaction to proceed smoothly under the same conditions, the amount of additives needs to be increased to ensure sufficient active sites to promote the reaction.

[0026] 2. Through the dispersant addition confirmation mechanism set up, it is possible to automatically determine whether the dispersant needs to be added and the amount of dispersant added based on the amount of raw materials used. When the amount of raw materials increases to the set threshold, the dispersant addition process is started, and the more raw materials are used, the more dispersant is used. Because with the increase in the amount of raw materials, the collision frequency between particles increases significantly, and the possibility of agglomeration greatly increases. More raw materials will produce more whiskers or particles during the reaction process. These whiskers or particles are more likely to contact and adhere to each other in a limited reaction space, thus forming agglomerates. In order to inhibit agglomeration, dispersants need to be added, and blind addition of dispersants is avoided, which will introduce additional impurity components. When used in subsequent fields with high purity requirements such as electronic materials, it will affect the electrical properties and stability of the product. Moreover, when the whiskers are chemically analyzed or used in some high-precision experimental research, these additional impurities will interfere with the results.

[0027] 3. Through the setting of the mixing and feeding mechanism, the raw materials, additives and dispersants can be well mixed, so that the reactants are fully mixed and contacted, the reaction rate is improved, and the mixing time can be automatically adjusted based on the amount of materials to ensure complete mixing.

[0028] 4. The support rotation mechanism can make the reaction vessel continuously move and rotate during the preparation process of zinc oxide whiskers. Because in the resistance heating box, heat is mainly transferred to the reaction vessel by radiation and conduction. If the reaction vessel is stationary, it will cause uneven temperatures in different parts of the container, thereby affecting the consistency of the reaction and the molding quality of the product. Rotation can make the material in the container constantly change its position, receive heat more evenly, reduce temperature gradients, and help obtain more uniform reaction products and better molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of a front cross-sectional structure of a device for preparing zinc oxide whiskers provided by the present invention;

[0030] Figure 2 This is a schematic cross-sectional view of a material support rotation mechanism of a zinc oxide whisker preparation device provided by the present invention;

[0031] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure of the middle part;

[0032] Figure 4 This is a structural schematic diagram of a multi-stage feeding mechanism of a zinc oxide whisker preparation device provided by the present invention;

[0033] Figure 5 It is a schematic three-dimensional cross-sectional structural diagram of a mixing and feeding mechanism of a zinc oxide whisker preparation device provided by the present invention;

[0034] Figure 6 This is a schematic cross-sectional view of a feeding control mechanism of a zinc oxide whisker preparation device provided by the present invention;

[0035] Figure 7 The present invention provides a schematic cross-sectional structural diagram of a dispersant addition confirmation mechanism of a zinc oxide whisker preparation device.

[0036] In the figure: 1 base, 2 high temperature heating mechanism, 21 lower support shell, 22 L-shaped support plate, 23 electric push rod, 24 resistance heating box, 25 positioning rod, 26 positioning socket, 3 support rotation mechanism, 31 heat insulation circular plate, 32 rotating motor, 33 transmission shaft, 34 reaction container, 35 transmission gear, 36 annular inner rack, 4 multi-stage feeding mechanism, 41 column, 42 motor rotating assembly, 43 support plate, 44 raw material storage tank, 45 additive storage tank, 46 dispersant storage tank, 47 feeding pipe, 48 feeding pump, 5 mixing and feeding mechanism, 51 electric slide rail, 52 electric lifting rod, 53 L-shaped fixed plate, 54 flip motor Machine, 55 U-shaped bracket, 56 mixing box, 57 feeding pipe, 58 electric control on-off valve, 59 reciprocating rod, 510 dispersion screen, 511 reciprocating plate, 512 return spring, 513 rotating shaft, 514 driving motor, 515 cam, 6 feeding control mechanism, 61 control shell, 62 control screw, 63 servo motor, 64 moving plate, 65 pressure switch, 66 forward and reverse screw, 67 forward and reverse motor, 68 pressing plate, 7 dispersant addition confirmation mechanism, 71 side plate, 72 adjusting resistance rod, 73 guide slide, 74 sliding seat, 75 compensation spring, 76 adjusting conductive contact, 77 electrical connection strip, 78 conductive block, 8PLC controller. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] like Figure 1-Figure 7 As shown, a device for preparing zinc oxide whiskers includes a base 1 and further includes:

[0039] The high-temperature heating mechanism 2 is fixedly mounted on one side of the upper end of the base 1. The high-temperature heating mechanism 2 includes a lower support shell 21 fixedly mounted on the upper end of the base 1. An L-shaped support plate 22 is fixedly mounted on the rear side of the upper end of the base 1. Two electric push rods 23 are symmetrically fixedly inserted into the horizontal part of the L-shaped support plate 22. The lower movable ends of the two electric push rods 23 are fixedly connected to the same resistance heating box 24. A plurality of positioning rods 25 are equidistantly fixedly connected to the lower end of the resistance heating box 24. A plurality of positioning sockets 26 that match the positioning rods 25 are opened at the upper end of the lower support shell 21.

[0040] The material support rotation mechanism 3 is installed in the high-temperature heating mechanism 2. The material support rotation mechanism 3 includes a heat-insulating circular plate 31 that is sealed and rotatably sleeved in the lower support shell 21. A rotating motor 32 is fixedly installed on the bottom of the inner wall of the lower support shell 21. The upper output end of the rotating motor 32 is fixedly connected to the center of the lower end of the heat-insulating circular plate 31. A plurality of through holes distributed in an annular pattern are evenly opened on the surface of the heat-insulating circular plate 31, and a transmission shaft 33 is rotatably sleeved in the corresponding through holes through a high-temperature resistant bearing. The upper end of the transmission shaft 33 is fixedly connected to the reaction container 34, and the lower end of the transmission shaft 33 is fixedly connected to the transmission gear 35. An annular inner rack 36 that is meshed with multiple transmission gears 35 is fixedly installed on the bottom of the inner wall of the lower support shell 21.

[0041] The multi-stage feeding mechanism 4 is fixedly mounted on the upper end of the base 1. The multi-stage feeding mechanism 4 includes a column 41 rotatably connected to the upper end of the base 1. The upper end of the base 1 is fixedly mounted with a motor rotating assembly 42 for driving the column 41 to rotate. The upper end of the column 41 is fixedly connected with a supporting plate 43. The upper end of the supporting plate 43 is fixedly mounted with a raw material storage tank 44, an additive storage tank 45 and a dispersant storage tank 46 in sequence. A feeding pipe 47 is mounted on the tank wall of the raw material storage tank 44, the additive storage tank 45 and the dispersant storage tank 46. The lower end of the feeding pipe 47 passes through the lower end of the supporting plate 43. A feeding pump 48 is mounted on the feeding pipe 47. The feeding pump 48 is fixedly mounted on the upper end of the supporting plate 43.

[0042] The mixing and feeding mechanism 5 is fixedly mounted on the upper end of the base 1 and is arranged corresponding to the position of the multi-stage feeding mechanism 4. The mixing and feeding mechanism 5 includes an electric slide rail 51 fixedly mounted on the upper end of the base 1. The upper end of the slider in the electric slide rail 51 is fixedly connected to an electric lifting rod 52. The upper movable end of the electric lifting rod 52 is fixedly connected to an L-shaped fixed plate 53. A flip motor 54 is fixedly mounted on the side wall of the L-shaped fixed plate 53. The output end of the flip motor 54 passes through the side wall of the L-shaped fixed plate 53 and is fixedly connected to a mixing box 56 through a U-shaped bracket 55. The upper side of the mixing box 56 is fixedly connected to a feed pipe 57. An electrically controlled on-off valve 58 is installed on the feed pipe 57. A plurality of jacks are provided on opposite sides of the mixing box 56, and the corresponding jacks are connected to the feed pipe 57. A reciprocating rod 59 is movably inserted in the hole, and one end of the multiple reciprocating rods 59 located in the mixing box 56 is fixedly connected to the same dispersion mesh plate 510, and an elastic sealing gasket is connected between the inner wall of the mixing box 56 and the end side wall of the dispersion mesh plate 510. The ends of the multiple reciprocating rods 59 located on the same side outside the mixing box 56 are fixedly connected to the same reciprocating plate 511, and the reciprocating plate 511 and the mixing box 56 are fixedly connected to the opposite side with multiple return springs 512 sleeved on the outside of the reciprocating rod 59. A rotating shaft 513 is rotatably connected in the U-shaped bracket 55, and a driving motor 514 for driving the rotating shaft 513 to rotate is fixedly installed on the outer wall of the U-shaped bracket 55, and the shaft wall of the rotating shaft 513 is fixedly sleeved with a cam 515 located on one side of the reciprocating plate 511.

[0043] The feeding control mechanism 6 is fixedly mounted on the multi-stage feeding mechanism 4. The feeding control mechanism 6 includes a control shell 61. The inner wall of the control shell 61 is rotatably connected to the control screw 62. The outer wall of the control shell 61 is fixedly mounted with a servo motor 63 for driving the control screw 62 to rotate. The rod wall of the control screw 62 is threadedly sleeved with a movable plate 64. The side wall of the movable plate 64 is fixedly mounted with a pressure switch 65. The inner wall of the control shell 61 is also rotatably connected to a forward and reverse screw 66 arranged parallel to the control screw 62. The outer wall of the control shell 61 is fixedly mounted with a forward and reverse motor 67 for driving the forward and reverse screw 66 to rotate. The rod wall of the forward and reverse screw 66 is threadedly sleeved with a pressing plate 68. The pressing plate 68 is located on one side of the pressure switch 65. The outer walls of the movable plate 64 and the pressing plate 68 are fixedly connected to a limit slider. The inner wall of the control shell 61 is provided with a limit slide groove that matches and slides with the limit slider. The top of the inner wall of the control shell 61 is also provided with a dispersant addition confirmation mechanism 7.

[0044] The dispersant addition confirmation mechanism 7 includes two side plates 71 symmetrically fixedly connected to the top of the inner wall of the control shell 61, an adjusting resistor rod 72 is fixedly connected between the two side plates 71, and a plurality of guide slides 73 arranged side by side are also fixedly connected between the two side plates 71. The plurality of guide slides 73 are slidably sleeved on the outside with the same sliding seat 74, and a plurality of compensation springs 75 sleeved on the outside of the guide slide 73 are fixedly connected between the sliding seat 74 and one of the side plates 71. The side wall of the sliding seat 74 is provided with a sleeve hole sleeved on the outside of the adjusting resistor rod 72, and the inner wall of the corresponding sleeve hole is fixedly connected with an adjusting conductive contact 76 that is in electrical contact with the adjusting resistor rod 72. An electric connection strip 77 is fixedly installed on the top of the inner wall of the control shell 61, and a conductive block 78 is fixedly connected to the upper end of the sliding seat 74.

[0045] The PLC controller 8 is fixedly mounted on the upper end of the base 1 and is electrically connected to the high temperature heating mechanism 2, the material support rotation mechanism 3, the multi-stage feeding mechanism 4, the material mixing and feeding mechanism 5 and the feeding control mechanism 6 respectively.

[0046] The operating principle of the present invention is described as follows: the PLC controller 8 controls the motor rotation assembly 42 to drive the column 41 to rotate, and the column 41 drives the support plate 43 to rotate, so that the feed pipe 47 connected to the raw material discharge tank moves to the upper side of the feed pipe 57. The PLC controller 8 then controls the electric lifting rod 52 to push the mixing box 56 upward, so that the feed pipe 57 on the mixing box 56 is connected to the feed pipe 47;

[0047] The data information of the amount of zinc oxide whiskers that need to be prepared is input into the PLC controller 8. The PLC controller 8 controls the action of the servo motor 63 based on the preparation amount. The servo motor 63 drives the control screw 62 to rotate. By controlling the threaded connection between the screw 62 and the movable plate 64, the movable plate 64 drives the pressure switch 65 to move relative to each other in the control shell 61. Specifically, the more the preparation amount of zinc oxide whiskers that needs to be prepared, the longer the time the PLC controller 8 controls the servo motor 63 to work, and thus the movable plate 64 drives the pressure switch 65 to move a greater distance, which increases the distance between the pressure switch 65 and the pressing plate 68. After the pressure switch 65 is moved to the right position, the PLC controller 8 controls the forward and reverse motors. 67 operates at the first gear power, the forward and reverse motor 67 first drives the forward and reverse screw 66 to rotate forward, and the pressing plate 68 is moved toward the pressure switch 65 through the threaded connection between the forward and reverse screw 66 and the pressing plate 68, and when controlling the forward and reverse motor 67 to operate, the PLC controller 8 synchronously controls the feed pump 48 on the raw material storage tank 44 to work, and the feed pump 48 cooperates with the feed pipe 47 to transport the zinc compound in the raw material storage tank 44 to the mixing box 56 through the feed pipe 57 until the pressing plate 68 presses on the pressure switch 65, at which time the PLC controller 8 controls the feed pump 48 to stop working, and controls the forward and reverse motor 67 to drive the forward and reverse screw 66 to reverse for the same forward rotation time, so that the pressing plate 68 is reset to the initial position;

[0048] At this time, the PLC controller 8 first controls the electric lifting rod 52 to drive the mixing box 56 to move downward, so that the feeding pipe 47 is separated from the feeding pipe 57, and controls the motor rotating assembly 42 to continue to drive the column 41 to drive the supporting plate 43 to rotate, so that the feeding pipe 47 on the additive storage tank 45 moves to the upper side of the feeding pipe 57. Similarly, the PLC controller 8 controls the electric lifting rod 52 to push the mixing box 56 upward again, so that the feeding pipe 47 is connected to the feeding pipe 57. At this time, the PLC controller 8 controls the forward and reverse motor 67 to work at the second gear power. At the same time, the feeding pump 48 on the additive storage tank 45 is controlled to work until the pressure switch 65 is pressed and triggered to complete the addition of the additive. The second gear power of the forward and reverse motor 67 is greater than the first gear power, which makes the interval time for the pressure switch 65 to be pressed and triggered short, and the amount of additive added is small. By controlling the power and speed of the forward and reverse motor 67, the amount of additive added is 6% of the raw material addition amount.

[0049] When the position of the pressure switch 65 is initially adjusted, when the raw material demand is large, the movable plate 64 will move to a position where it contacts the sliding seat 74, and push the sliding seat 74 to move along the guide slide 73 to overcome the elastic force of the compensation spring 75. Specifically, the greater the raw material demand, the greater the moving distance of the movable plate 64, thereby making the relative movement distance of the sliding seat 74 greater. First, the sliding seat 74 will make the conductive block 78 connected to its upper end contact with the electrical connection bar 77, and feed back an electrical signal to the PLC controller 8. The PLC controller 8 will control the multi-stage feeding mechanism 4 to continue to move, so that the feeding pipe 47 on the dispersant storage tank 46 is connected to the feeding pipe 57, so as to realize the addition of the dispersant, and when the sliding seat 74 moves, it will synchronously drive the adjusting guide The electrical contact 76 slides on the regulating resistor rod 72, and the greater the sliding distance, the greater the access resistance of the regulating resistor rod 72. Similarly, during the dispersant addition process, the PLC controller 8 controls the forward and reverse motors 67 to operate at the third gear of power, and at this time, the regulating conductive contact 76 and the regulating resistor rod 72 are connected in series to the power supply circuit of the forward and reverse motors 67, thereby achieving that when the amount of raw material used is greater, the access resistance of the regulating resistor rod 72 is greater, the power supply current of the forward and reverse motors 67 is smaller, the speed of the forward and reverse motors 67 is slower, and the interval time of the pressing plate 68 pressing on the pressure switch 65 is longer, so that more dispersant is added, thereby achieving automatic selection of whether the dispersant needs to be added, and accurately controlling the amount of dispersant added;

[0050] When all the materials are added into the mixing box 56, the PLC controller 8 controls the electric control on-off valve 58 on the feeding pipe 57 to close, and the PLC controller 8 controls the flip motor 54 to drive the mixing box 56 to flip 180 degrees every 10 seconds, so that the materials are located on the upper side of the dispersion screen 510, and the PLC controller 8 controls the drive motor 514 to operate, and the drive motor 514 drives the rotating shaft 513 to drive the cam 515 to rotate continuously. When the protrusion of the cam 515 pushes on the reciprocating plate 511, the reciprocating plate 511 cooperates with the reciprocating rod 510 to rotate. 9 overcomes the elastic force of the return spring 512 and moves forward. When the protruding portion of the cam 515 leaves the reciprocating plate 511, the dispersion screen 510 moves back under the action of the return spring 512, thereby realizing continuous reciprocating movement of the dispersion screen 510, dispersing and mixing the materials on the dispersion screen 510, and achieving complete dispersion and mixing of the materials after multiple reciprocating movements. The PLC controller 8 controls the working time of the mixing and feeding mechanism 5 based on the preset amount of raw material added. The more raw material added, the longer the working time of the mixing and feeding mechanism 5 is controlled.

[0051] After the material mixing is completed, the PLC controller 8 controls the electric slide 51 to drive the mixing box 56 to move between the lower support shell 21 and the resistance heating box 24, and controls the flip motor 54 to drive the mixing box 56 to rotate to make the feeding tube 57 located at the bottom, so that the feeding tube 57 is aligned with the reaction vessel 34, and the PLC controller 8 then opens the electric control on-off valve 58 on the feeding tube 57, so that the mixed material falls into the reaction vessel 34, and in this process, the PLC controller 8 also controls the driving motor 514 to move, so that the dispersion mesh plate 510 vibrates, and the material on the dispersion mesh plate 510 is quickly shaken off to ensure complete loading, and a layer of polytetrafluoroethylene coating is provided on the inner wall of the mixing box 56, the inner wall of the feeding tube 57 and the inner wall of the electric control on-off valve 58. The polytetrafluoroethylene coating has excellent non-stick properties, so that the material can fall completely into the reaction vessel 34. After repeated material mixing, all reaction vessels 34 are added with reaction raw materials;

[0052] The PLC controller 8 then controls the electric push rod 23 to push the resistance heating box 24 toward the lower support shell 21, and through the plug-in action of the positioning rod 25 and the positioning socket 26, the resistance heating box 24 is stably and accurately connected to the lower support shell 21. The resistance heating box 24 provides heating to achieve the preparation of zinc oxide whiskers. During the preparation process, the PLC controller 8 rotates the motor 32, and the rotating motor 32 drives the insulation circular plate 31 to rotate in the lower support shell 21, thereby driving multiple reaction containers 34 to revolve. During the movement, the transmission gear 35 is displaced relative to the annular inner rack 36. The meshing action of the transmission gear 35 and the annular inner rack 36 drives the transmission shaft 33 to drive the reaction container 34 to rotate, thereby causing the material in the reaction container 34 to continuously change position, receive heat more evenly, reduce temperature gradients, and help obtain more uniform reaction products and better molding quality.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for preparing zinc oxide whiskers, comprising a base (1), characterized in that: Also includes: A high-temperature heating mechanism (2) is fixedly mounted on one side of the upper end of the base (1); A material support rotation mechanism (3) is installed in the high-temperature heating mechanism (2); A multi-stage feeding mechanism (4) is fixedly mounted on the upper end of the base (1); A mixing and feeding mechanism (5) is fixedly mounted on the upper end of the base (1) and is arranged corresponding to the position of the multi-stage feeding mechanism (4); A feeding control mechanism (6) is fixedly mounted on the multi-stage feeding mechanism (4); A PLC controller (8) is fixedly mounted on the upper end of the base (1) and is electrically connected to the high-temperature heating mechanism (2), the material support rotation mechanism (3), the multi-stage feeding mechanism (4), the mixing and feeding mechanism (5), and the feeding control mechanism (6); The feeding control mechanism (6) includes a control shell (61), the inner wall of which is rotatably connected to a control screw (62), the outer wall of which is fixedly provided with a servo motor (63) for driving the control screw (62) to rotate, the rod wall of which is threadedly sleeved with a movable plate (64), the side wall of which is fixedly provided with a pressure switch (65), the inner wall of which is also rotatably connected to a forward and reverse screw (66) arranged parallel to the control screw (62), the outer wall of which is fixedly provided with a forward and reverse motor (67) for driving the forward and reverse screw (66) to rotate, the rod wall of which is threadedly sleeved with a pressing plate (68), the pressing plate (68) being located on one side of the pressure switch (65), and the top of the inner wall of which is also provided with a dispersant addition confirmation mechanism (7).

2. A preparation device for zinc oxide whiskers according to claim 1, characterized in that, The high-temperature heating mechanism (2) comprises a lower support shell (21) fixedly mounted on the upper end of the base (1); an L-shaped support plate (22) is fixedly mounted on the rear side of the upper end of the base (1); two electric push rods (23) are symmetrically fixedly inserted into the horizontal portion of the L-shaped support plate (22); the lower movable ends of the two electric push rods (23) are fixedly connected to the same resistance heating box (24); a plurality of positioning rods (25) are fixedly connected to the lower end of the resistance heating box (24) at equal intervals; and a plurality of positioning sockets (26) are provided at the upper end of the lower support shell (21) for matching and plugging with the positioning rods (25).

3. A preparation device for zinc oxide whiskers according to claim 2, characterized in that, The support rotation mechanism (3) includes a heat-insulating circular plate (31) that is sealed and rotatably sleeved in the lower support shell (21); a rotating motor (32) is fixedly installed at the bottom of the inner wall of the lower support shell (21); an upper output end of the rotating motor (32) is fixedly connected to the center of the lower end of the heat-insulating circular plate (31); a surface of the heat-insulating circular plate (31) is evenly provided with a plurality of through holes distributed in an annular pattern, and a transmission shaft (33) is rotatably sleeved in the corresponding through holes through a high-temperature resistant bearing; the upper end of the transmission shaft (33) is fixedly connected to a reaction container (34); the lower end of the transmission shaft (33) is fixedly connected to a transmission gear (35); and an annular inner rack (36) that is meshed with the plurality of transmission gears (35) is fixedly installed at the bottom of the inner wall of the lower support shell (21).

4. A preparation device for zinc oxide whiskers according to claim 1, characterized in that, The multi-stage feeding mechanism (4) includes a column (41) rotatably connected to the upper end of the base (1), a motor rotating assembly (42) for driving the column (41) to rotate is fixedly installed on the upper end of the base (1), the upper end of the column (41) is fixedly connected to a supporting plate (43), the upper end of the supporting plate (43) is fixedly installed with a raw material storage tank (44), an additive storage tank (45) and a dispersant storage tank (46) in sequence, and a feeding pipe (47) is installed on the tank wall of the raw material storage tank (44), the additive storage tank (45) and the dispersant storage tank (46), the lower end of the feeding pipe (47) passes through the lower end of the supporting plate (43), and a feeding pump (48) is installed on the feeding pipe (47), and the feeding pump (48) is fixedly installed on the upper end of the supporting plate (43).

5. A preparation device for zinc oxide whiskers according to claim 1, characterized in that, The mixing and feeding mechanism (5) includes an electric slide rail (51) fixedly mounted on the upper end of the base (1), the upper end of the slider in the electric slide rail (51) is fixedly connected to an electric lifting rod (52), the upper movable end of the electric lifting rod (52) is fixedly connected to an L-shaped fixed plate (53), a flip motor (54) is fixedly mounted on the side wall of the L-shaped fixed plate (53), the output end of the flip motor (54) passes through the side wall of the L-shaped fixed plate (53), and is fixedly connected to a mixing box (56) through a U-shaped bracket (55), the upper side of the mixing box (56) is fixedly connected to a feed pipe (57), an electric control on-off valve (58) is mounted on the feed pipe (57), a plurality of jacks are provided on opposite sides of the mixing box (56), and a reciprocating rod (59) is provided in the corresponding movable sleeves in the jacks. One end of the reciprocating rod (59) located in the mixing box (56) is fixedly connected to the same dispersion mesh plate (510), and an elastic sealing gasket is connected between the inner wall of the mixing box (56) and the end side wall of the dispersion mesh plate (510). One end of multiple reciprocating rods (59) located on the same side and located outside the mixing box (56) is fixedly connected to the same reciprocating plate (511). The reciprocating plate (511) and the mixing box (56) are fixedly connected on the opposite side to multiple return springs (512) sleeved on the outside of the reciprocating rod (59). A rotating shaft (513) is rotatably connected inside the U-shaped bracket (55). A driving motor (514) for driving the rotating shaft (513) to rotate is fixedly installed on the outer wall of the U-shaped bracket (55). The shaft wall of the rotating shaft (513) is fixedly sleeved with a cam (515) located on one side of the reciprocating plate (511).

6. A zinc oxide whisker preparation device according to claim 1, characterized in that, The dispersant addition confirmation mechanism (7) includes two side plates (71) symmetrically fixedly connected to the top of the inner wall of the control shell (61), an adjustment resistor rod (72) is fixedly connected between the two side plates (71), and a plurality of guide slides (73) arranged side by side are also fixedly connected between the two side plates (71), and the plurality of guide slides (73) are slidably sleeved on the outside of the same sliding seat (74), and a plurality of compensation springs (75) sleeved on the outside of the guide slide (73) are fixedly connected between the sliding seat (74) and one of the side plates (71), a sleeve hole sleeved on the outside of the adjustment resistor rod (72) is opened on the side wall of the sliding seat (74), and an adjustment conductive contact (76) electrically contacting the adjustment resistor rod (72) is fixedly connected to the inner wall of the corresponding sleeve hole, an electric connection strip (77) is fixedly installed on the top of the inner wall of the control shell (61), and a conductive block (78) is fixedly connected to the upper end of the sliding seat (74).

7. A zinc oxide whisker preparation device according to claim 1, characterized in that, The outer walls of the movable plate (64) and the pressing plate (68) are fixedly connected to a limit slider, and the inner wall of the control housing (61) is provided with a limit sliding groove that matches and slides with the limit slider.

8. A process for preparing zinc oxide whiskers, which uses the device for preparing zinc oxide whiskers according to claim 1, characterized in that: The steps include: S1. By setting a multi-stage feeding mechanism (4) and a feeding control mechanism (6), the preparation amount of zinc oxide whiskers is precisely controlled based on production needs, and the amount of additives is synchronously adjusted based on the amount of raw materials used; S2. By setting the dispersant addition confirmation mechanism (7), it is automatically determined whether the dispersant needs to be added and the amount of dispersant added based on the amount of raw materials used; S3. The mixing and feeding mechanism (5) is provided to mix the raw materials, additives and dispersants well, thereby making the reactants fully mixed and contacted, thereby increasing the reaction rate, and automatically controlling the mixing time based on the amount of materials used to ensure complete mixing; S4. By setting the material support rotation mechanism (3), the material can continuously change its position, receive heat more evenly, reduce the temperature gradient, and help obtain a more uniform reaction product and better molding quality.

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