Preparation equipment and preparation method of nano antibacterial ABS (Acrylonitrile Butadiene Styrene) plastic

Abstract

The invention relates to the technical field of ABS plastics, in particular to nano-antibacterial ABS plastic preparation equipment and a preparation method.The nano-antibacterial ABS plastic preparation equipment comprises a drying cylinder, the drying cylinder is rotationally connected with gear discs, a connecting shaft is fixedly connected between the two gear discs, the connecting shaft is symmetrically and fixedly connected with a shoveling plate assembly, an air inlet cover is fixedly connected with a fixing ring, and the fixing ring is provided with a gear tooth set; materials deposited at the bottom of the drying cylinder can be shoveled through the shoveling plate assembly, then after the shoveling plate assembly rotates to a certain angle, the rotating gear is meshed with the gear tooth set, the shoveling plate is driven to turn over gradually and be opened, and therefore the materials on the shoveling plate assembly fall off gradually, and the materials on the drying cylinder are separated from the drying cylinder along with continuous turning of the shoveling plate assembly. According to the ABS plastic drying device, part of materials which do not fall off are overturned to the highest position and then freely fall off, in this way, the materials fall off in batches, the materials can be more dispersed, meanwhile, hot air is evenly injected into the drying cylinder in cooperation with the air inlet cover and the vent holes, wet air is discharged out of the air outlet cover, and in this way, ABS plastic is efficiently dried.

Description

Technical Field

[0001] The invention relates to the field of ABS plastics, in particular to a preparation device and a preparation method of nano antibacterial ABS plastics. Background Art

[0002] During production and preparation, ABS plastic needs to be processed by melt extrusion, cooling, granulation and drying before being packaged and sold. In order to improve the drying efficiency of ABS plastic, a drum dryer is often used for drying, that is, the raw materials are poured into a drum, and then the raw materials inside are turned over by the rotation of the drum, and hot air is injected into the drum for drying. However, this drying method easily causes the raw materials to be deposited at the bottom of the drum and not dispersed enough, thereby reducing the drying efficiency. The existing drum is provided with a lifting plate on the inner wall, so that the material can be lifted up when the drum rotates, and then it falls freely after turning to a certain height. However, this method does not have an obvious dispersion effect when the material falls. Therefore, the present invention provides a preparation device and a preparation method for nano antibacterial ABS plastic. Summary of the invention

[0003] The object of the present invention is to provide a preparation device and a preparation method for nano antibacterial ABS plastic, which can improve the drying efficiency of ABS plastic and ensure the drying effect.

[0004] To achieve the above object, the present invention provides the following first technical solution: A preparation device for nano antibacterial ABS plastic, comprising a drying cylinder with two ends through, the two ends of the drying cylinder are symmetrically sealed and rotatably connected with gear plates, the sides of the two gear plates away from each other are respectively sealed and rotatably connected with an air inlet hood and an air outlet hood, the tops of the air inlet hood and the air outlet hood are respectively connected with an air inlet pipe and an air outlet pipe, the two gear plates are both penetrated and opened with a plurality of vents, a connecting shaft is fixedly connected between the centers of the two gear plates, the two opposite side walls of the connecting shaft are symmetrically fixedly connected with a shoveling plate assembly, the opposite ends of the shoveling plate assembly are respectively fixedly connected with the two gear plates, and the end of the shoveling plate assembly away from the connecting shaft abuts against the inner wall of the drying cylinder, the inner wall of the air inlet hood is fixedly connected with a fixing ring, the inner wall of the fixing ring is provided with two sets of gear teeth at intervals, and the two gear teeth sets are provided with a plurality of identical gear teeth; The copy board assembly includes a mounting frame, and the mounting frame is fixedly connected to the connecting shaft. A plurality of copy boards are rotatably connected at equal distances between opposite ends of the inner wall of the mounting frame, and the cross-sections of the two side walls of each copy board are arc-shaped. One end of the rotating shaft of each copy board passes through a gear plate and is equipped with a sprocket, and the sprockets are connected by a chain. A rotating rod is fixedly connected to the end of the rotating shaft of one copy board, and a rotating gear meshing with a gear set is fixedly connected to the outer wall of the rotating rod; It also includes a support frame, a driving motor is installed inside the support frame, a driving shaft is connected to the output end of the driving motor, two driving gears that mesh with the gear plate are fixedly connected to the outer wall of the driving shaft, and the support frame is connected to the drying cylinder, the air inlet hood and the air outlet hood through a fixing block.

[0005] Preferably, one end of the connecting shaft passes through a gear plate and is rotatably connected to a fixed shaft, and the fixed shaft is fixedly connected to the inner wall of the air outlet hood, and a reciprocating thread groove is provided on the outer wall of the fixed shaft, and a sliding plate is threadedly connected to the outer wall of the reciprocating thread groove, and a side of the sliding plate close to the gear plate is provided with a pin that cooperates with the vent hole, and a side of the gear plate close to the air outlet hood is fixedly connected to a limiting rod, and the limiting rod passes through the sliding plate and is slidably connected to the sliding plate.

[0006] Preferably, the connecting shaft is a structure that is hollow inside and through at both ends, and one end of the connecting shaft passes through the air outlet hood, a first feed port is provided on the side wall of the connecting shaft, an electric cylinder is fixedly connected to the outer wall of the air inlet hood, the telescopic end of the electric cylinder passes through the air inlet hood and is rotatably connected to the feed shaft, and the feed shaft is inserted into the inner cavity of the connecting shaft and is slidably connected to the inner wall of the connecting shaft, the free end of the feed shaft is a through structure, a second feed port that cooperates with the first feed port is provided on the side wall of the feed shaft, and the first feed port and the second feed port are staggered during drying.

[0007] Preferably, the inner wall of the feeding shaft is provided with spiral feeding blades.

[0008] Preferably, the number of the first feed ports is three, and the three groups of first feed ports are arranged along the length direction of the connecting shaft.

[0009] Preferably, a limiting groove is provided on the inner wall of the connecting shaft along the length direction, and a limiting strip cooperating with the limiting groove is provided on the outer wall of the feeding shaft, and the length of the limiting strip is smaller than the length of the limiting groove.

[0010] Preferably, the two rotating rods are telescopic structures, the free ends of the rotating rods are fixedly connected to the connecting rods via the first bearing, and the free ends of the connecting rods are rotatably connected to the outer wall of the telescopic end of the electric cylinder via the second bearing.

[0011] Preferably, the gear tooth group includes an arc-shaped bar matching with the fixing ring, the fixing ring is provided with a sliding groove cooperating with the arc-shaped bar, a side of the arc-shaped bar passing through the fixing ring is provided with a plurality of gear teeth, a side of the arc-shaped bar away from the gear plate is provided with an arc-shaped limiting groove, the arc-shaped bar is threadedly connected with a locking bolt, and the locking bolt abuts against the surface of the arc-shaped limiting groove.

[0012] Preferably, a feed hopper with an end cover is provided at the top of the drying cylinder, an openable discharge door is provided at the bottom of the drying cylinder, and an inclined material guide plate is provided in the support frame.

[0013] The present invention provides the following second technical solution: A method for preparing nano antibacterial ABS plastic comprises the following steps: S1: Raw material mixing: weigh the raw materials according to the ratio, and mix them evenly to obtain a mixed raw material, and the ratio of the raw materials is: ABS 90-110 parts, dispersant 2-5 parts, composite antibacterial agent 3-6 parts, antioxidant 2-5 parts, wherein the composite antibacterial agent is a mixture of modified diatomaceous earth and modified nano zinc oxide according to the mass ratio of (1-3): (1-2); S2: The mixed raw materials are placed in a twin-screw extruder for melt extrusion, cooling, granulation, and drying to obtain nano antibacterial ABS plastic, and the drying process is performed by a preparation device.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When the ABS plastic is dried, the present invention can drive the two gear plates to rotate through a driving motor, thereby driving the shoveling plate assembly between the two gear plates to rotate, so that the material deposited on the bottom of the drying cylinder is shoveled by the shoveling plate assembly, and then as the shoveling plate assembly rotates to a certain angle, the rotating gear is meshed with the gear group, and the sprocket and the chain drive the shoveling plate to gradually turn over and open, so that the material on the shoveling plate assembly gradually falls off, and as the shoveling plate assembly continues to turn over, part of the material that has not fallen off turns to the highest position and then falls freely, so that the raw materials are dropped in batches, so that the materials can be more dispersed, and at the same time, the air inlet hood and the air vent are used to uniformly inject hot air into the drying cylinder, and the wet air is discharged from the air outlet hood, so that the ABS plastic is dried efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the preparation equipment of the present invention; Figure 2 It is a schematic diagram of the front cross-section structure of the preparation equipment of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure enlargement at the center A; Figure 4 It is a schematic diagram of the side cross-section structure of the preparation equipment of the present invention; Figure 5It is a structural schematic diagram of the copy board assembly and its connecting parts in the preparation equipment of the present invention; Figure 6 for Figure 5 A schematic diagram of the structure enlarged at B in the middle; Figure 7 It is a schematic diagram of the exploded structure of the connecting shaft and the feeding shaft in the preparation equipment of the present invention; Figure 8 It is a schematic diagram of the connection structure of the fixed ring and the gear group in the preparation equipment of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Drying cylinder; 2. Gear plate; 3. Air inlet cover; 4. Air outlet cover; 5. Air inlet pipe; 6. Air outlet pipe; 7. Air vent; 8. Connecting shaft; 9. Copying plate assembly; 91. Mounting frame; 92. Copying plate; 93. Sprocket; 94. Chain; 95. Rotating rod; 96. Rotating gear; 10. Fixed ring; 101. Slide; 102. Arc limit groove; 11. Gear tooth group; 111. Arc strip; 112. Gear tooth; 113. Lock Tightening bolts; 12. Support frame; 13. Driving motor; 14. Driving shaft; 15. Driving gear; 16. Fixed block; 17. Fixed shaft; 18. Reciprocating thread groove; 19. Sliding plate; 20. Ejector pin; 21. Limit rod; 22. First feed port; 23. Electric cylinder; 24. Feeding shaft; 25. Second feed port; 26. Spiral feeding blade; 27. Connecting rod; 28. Feed hopper; 29. ​​Discharge door; 30. Guide plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1-8 As shown: One embodiment of the present invention is: A preparation device for nano antibacterial ABS plastics, comprising a drying cylinder 1 with two ends through, the drying cylinder 1 having gear plates 2 symmetrically sealed and rotatably connected at opposite ends, an air inlet hood 3 and an air outlet hood 4 respectively sealed and rotatably connected at the sides of the two gear plates 2 away from each other, an air inlet pipe 5 and an air outlet pipe 6 respectively connected at the tops of the air inlet hood 3 and the air outlet hood 4, a plurality of air vents 7 are opened through the two gear plates 2, a connecting shaft 8 is fixedly connected between the centers of the two gear plates 2, a shoveling plate assembly 9 is symmetrically fixedly connected to the opposite side walls of the connecting shaft 8, the shoveling plate assembly 9 is respectively fixedly connected to the two gear plates 2 at opposite ends, and one end of the shoveling plate assembly 9 away from the connecting shaft 8 abuts against the inner wall of the drying cylinder 1, a fixing ring 10 is fixedly connected to the inner wall of the air inlet hood 3, two sets of gear tooth groups 11 are arranged at intervals on the inner wall of the fixing ring 10, and the two gear tooth groups 11 are provided with a plurality of identical gear teeth 112; The copy board assembly 9 includes a mounting frame 91, and the mounting frame 91 is fixedly connected to the connecting shaft 8. A plurality of copy boards 92 are rotatably connected between opposite ends of the inner wall of the mounting frame 91 at equal distances, and the cross-sections of the two side walls of each copy board 92 are arc-shaped. One end of the rotating shaft of each copy board 92 passes through a gear plate 2 and is installed with a sprocket 93, and the sprockets 93 are connected by a chain 94. A rotating rod 95 is fixedly connected to the end of the rotating shaft of a copy board 92, and a rotating gear 96 meshing with the gear set 11 is fixedly connected to the outer wall of the rotating rod 95. The support frame 12 also includes a driving motor 13 installed inside the support frame 12, the output end of the driving motor 13 is connected to a driving shaft 14, the outer wall of the driving shaft 14 is fixed with two driving gears 15 that mesh with the gear plate 2, and the support frame 12 is connected to the drying cylinder 1, the air inlet hood 3 and the air outlet hood 4 through a fixing block 16.

[0020] In this embodiment, in order to avoid the blockage of the vent hole at one end of the air outlet hood and cause the air circulation to be not smooth, a gear plate 2 is passed through one end of the connecting shaft 8 and is rotatably connected to a fixed shaft 17, and the fixed shaft 17 is fixedly connected to the inner wall of the air outlet hood 4. A reciprocating thread groove 18 is provided on the outer wall of the fixed shaft 17, and a sliding plate 19 is threadedly connected to the outer wall of the reciprocating thread groove 18. A side of the sliding plate 19 close to the gear plate 2 is provided with a ejector pin 20 that cooperates with the vent hole 7. A side of the gear plate 2 close to the air outlet hood 4 is fixedly connected to a limiting rod 21, and the limiting rod 21 passes through the sliding plate 19 and is slidably connected to the sliding plate 19. When the gear plate rotates, the two limiting rods can drive the sliding plate to rotate along the outer wall of the fixed shaft, thereby driving the sliding plate and the ejector pin to move back and forth along the fixed shaft through the reciprocating thread groove, so that the ejector pin can be reciprocated and inserted into the vent hole of the gear plate, thereby cleaning the vent hole to avoid blockage.

[0021] In this embodiment, in order to be able to sample and detect the drying condition of the material in time, the connecting shaft 8 is a structure with a hollow interior and two through-holes, and one end of the connecting shaft 8 passes through the air outlet hood 4 (and when the connecting shaft 8 is composed of a relatively rotating connecting shaft 8 and a fixed shaft 17, the interior of the fixed shaft 17 is also a hollow structure and a through-hole structure), a first feed port 22 is opened on the side wall of the connecting shaft 8, an electric cylinder 23 is fixedly connected to the outer wall of the air inlet hood 3, the telescopic end of the electric cylinder 23 passes through the air inlet hood 3 and is rotatably connected to a feed shaft 24, and the feed shaft 24 is inserted into the inner cavity of the connecting shaft 8 and is slidably connected to the inner wall of the connecting shaft 8, and the free end of the feed shaft 24 It is a through structure, and a second feed port 25 cooperating with the first feed port 22 is provided on the side wall of the feed shaft 24, and the first feed port 22 and the second feed port 25 are staggered during drying. A spiral feed blade 26 is provided on the inner wall of the feed shaft 24, and when sampling and testing are to be carried out, the feed shaft can be pushed to slide along the connecting shaft by an electric cylinder, so that the second discharge port and the first discharge port coincide with each other, and when the feed port is rotated to an upward position, the material picked up on the shoveling plate assembly can fall into the feed shaft, and then the rotation of the feed shaft drives the spiral feed blade to rotate, thereby sending the material to the fixed axis direction for sampling and testing.

[0022] In this embodiment, in order to be able to sample materials at different positions, three groups of first feed ports 22 are provided, and the three groups of first feed ports 22 are arranged along the length direction of the connecting shaft 8 .

[0023] In this embodiment, in order to ensure that the connecting shaft and the feeding shaft can slide relative to each other and roll synchronously, a limit groove is provided on the inner wall of the connecting shaft 8 along the length direction (and the limit groove is only provided on the inner wall of the connecting shaft, not on the inner wall of the fixed shaft), and a limit strip that cooperates with the limit groove is provided on the outer wall of the feeding shaft 24, and the length of the limit strip is less than the length of the limit groove.

[0024] In this embodiment, in order to ensure that more samples can be obtained during sampling, the two rotating rods 95 are of a telescopic structure. The free end of the rotating rod 95 is fixedly connected with the connecting rod 27 through the first bearing, and the free end of the connecting rod 27 is rotatably connected to the outer wall of the telescopic end of the electric cylinder 23 through the second bearing. During sampling, the electric cylinder can push the feeding shaft to slide and at the same time push the rotating rod to contract, so that the rotating gear is out of contact with the gear group, so that the copying board will not flip over after the copying board assembly completes copying, so that as much material as possible can be on the top of the copying board assembly, so that more material can fall into the feeding shaft after flipping to the top, so that the sampling is more accurate.

[0025] In this embodiment, in order to adjust the position of the gear teeth on the gear tooth group so that the shovel can be turned over at different heights to adapt to the drying of different materials, the gear tooth group 11 includes an arcuate bar 111 matching the fixed ring 10, and the fixed ring 10 is provided with a slide groove 101 cooperating with the arcuate bar 111. A side of the arcuate bar 111 passing through the fixed ring 10 is provided with a plurality of gear teeth 112, and a side of the arcuate bar 111 away from the gear plate 2 is provided with an arcuate limiting groove 102, and the arcuate bar 111 is threadedly connected with a locking bolt 113, and the locking bolt 113 abuts against the surface of the arcuate limiting groove 102, wherein the locking bolt is loosened and then the arcuate bar is slid along the slide groove, and the position of the gear tooth group is adjusted and then the arcuate bar is re-locked and fixed to complete the adjustment.

[0026] In this embodiment, a feed hopper 28 with an end cover is provided on the top of the drying cylinder 1, and the feed hopper is a strip-shaped feed hopper arranged along the length direction of the drying cylinder. An openable discharge door 29 is provided at the bottom of the drying cylinder 1, and an inclined material guide plate 30 is provided in the support frame 12.

[0027] The above preparation equipment is used in the drying process of ABS plastic as follows: The granulated ABS plastic is poured into the drying cylinder 1 through the feed hopper 28 , and poured back and forth along the length direction of the drying cylinder 1 so that the material can be evenly distributed in the drying cylinder 1 , and then the end cover of the feed hopper 28 is covered.

[0028] Then start the external hot air blower, induced draft fan and driving motor 13 (the hot air blower is connected to the air inlet pipe 5, and the induced draft fan is connected to the air outlet pipe 6). The hot air blower injects the generated hot air into the air inlet hood 3 through the air inlet pipe 5, and the hot air evenly enters the drying cylinder 1 through the air vents 7 on one side of the air inlet hood 3, and is discharged from the air vents 7 on one side of the air outlet hood 4, so that the hot air can evenly flow from one end of the drying cylinder 1 to the other end, thereby drying the material and taking away the wet air entrained in the material when it is discharged.

[0029] While the air is flowing, the driving motor 13 drives the two gear plates 2 to rotate through the two driving gears 15 (the speed is adjusted according to the actual drying situation), thereby driving the connecting shaft 8 and the two shoveling plate assemblies 9 to rotate (counterclockwise in this embodiment). The shoveling plates 92 in one set of shoveling plate assemblies 9 first scoop up the materials inside the drying cylinder 1 and gradually rotate in the counterclockwise direction. When rotating to a certain height, the rotating gear 96 meshes with a set of gear teeth 11 on the fixed ring 10, thereby driving the rotating gear 96 to rotate, and driving all the shoveling plates at the same time through the cooperation of the chain 94 and the sprocket 93. 92 rotates in one direction, so that an opening is formed between two adjacent shoveling plates 92. At this time, the material flows out along the opening and falls to the bottom of the drying cylinder 1. As the driving motor 13 rotates, the opening between the two adjacent shoveling plates 92 gradually increases until the rotating gear 96 is disengaged from the gear set 11. At this time, the shoveling plates 92 are opened to the maximum angle (90 degrees), and the shoveling plate assembly 9 is located above the connecting shaft 8. As the driving motor 13 continues to rotate, the material on the shoveling plate assembly 9 can be completely discharged. In this way, the material is dispersed and discharged in batches, thereby improving the dispersion efficiency of the material. After one set of copying plate components 9 rotates to the highest position, the other set of copying plate components 9 rotates to the bottom of the drying cylinder 1 to perform the copying operation again. At the same time, the rotating gear 96 on the copying plate component 9 located at the highest position is meshed with the other set of gear groups 11, driving the copying plate 92 to rotate 90 degrees again and turn to the horizontal position to wait for the next copying operation. After the copying plate component 9 is disengaged from the gear group 12, the other set of copying plate components 9 is meshed with the other set of gear groups 12. The copying operation is repeated in this way, and the hot air is continuously injected and flowed to efficiently take away the water vapor in the material, thereby improving the drying efficiency of the material.

[0030] During the drying process, the rotation of the connecting shaft 8 and the gear plate 2 on one side of the air outlet hood 4 can drive the limiting rod 21 and the sliding plate 19 to rotate. At this time, the sliding plate 19 moves back and forth under the action of the reciprocating thread groove 18 on the outer wall of the fixed shaft 17, and can drive the ejector pin 20 to move toward the vent hole 7 and insert it into the vent hole 7 (the ejector pin 20 and the vent hole 7 can rotate synchronously), thereby clearing the vent hole 7 to avoid blockage and affecting air circulation.

[0031] After drying for a period of time, sampling is required to detect the degree of dryness of the material. When both sets of copying plate assemblies 9 are closed (a visual window is set through the side wall of the drying cylinder 1 to observe the internal working conditions, or a visual window is set at the end of the air inlet hood 3, so that the position of the copying plate assembly 9 at this time can be judged in real time), the electric cylinder 23 is started, and the electric cylinder 23 drives the feeding shaft 24 and the connecting rod 27 to move, wherein the movement of the feeding shaft 24 makes the second feeding port 25 coincide with the first feeding port 22, and the movement of the connecting rod 27 drives the rotating rod 95 and the rotating gear 96 to move, and adjusts the position of the rotating gear 96 so that the rotating gear 96 is misaligned with the gear group 11. At this time, as the gear plate 2 rotates, the copying plate 92 will not be driven to flip, so the material picked up by the copying plate 92 can be transported to the highest position in large quantities, and then when the first feeding port 22 and the second feeding port 25 are flipped to the upward position, the picked up material passes through the first feeding port 22 and the second feeding port 25. The feed port 25 falls into the feed shaft 24, and the electric cylinder 23 is retracted after the upper shovel assembly 9 is separated from the area of ​​the gear group 11. At this time, the rotating gear 96 and the feed shaft 24 return to their original positions (that is, the rotating gear 96 can mesh with the gear group 11, and the first feed port 22 and the second feed port 25 are misaligned), and at this time, the connecting shaft 8 can drive the feed shaft 24 to rotate, so that the sampled material inside the feed shaft 24 is discharged out of the drying cylinder 1 under the conveying action of the spiral feeding blades 26, and then the staff judges the dryness of the material, and after the judgment is completed, the material is poured back into the drying cylinder 1, and when the first feed port 22 is provided with three groups, the materials at three positions of the drying cylinder 1 can be sampled during the sampling process, and because the same group of spiral feeding blades 26 are used for conveying during conveying, the materials at different positions can be delivered in batches, so that the staff can quickly judge the dryness of the materials at different positions.

[0032] The second embodiment of the present invention is: A method for preparing nano antibacterial ABS plastic comprises the following steps: S1: Raw material mixing: weigh each raw material according to the ratio, and mix them evenly to obtain a mixed raw material, and the ratio of each raw material is: 90 parts of ABS, 3 parts of dispersant, 5 parts of composite antibacterial agent, 2 parts of antioxidant, among which 3 parts of modified diatomaceous earth and 2 parts of modified nano zinc oxide are prepared in advance; S2: placing the mixed raw materials in a twin-screw extruder for melt extrusion, cooling, granulation and drying to obtain nano antibacterial ABS plastic; the drying treatment is carried out by a preparation device, and the screw length-diameter ratio of the twin-screw extruder is 44:1, the temperatures of zones 1-10 are: 200°C, 220°C, 220°C, 220°C, 210°C, 210°C, 210°C, 220°C, 230°C, and the die temperature is 230°C; the extruder speed is 480rpm; the vacuum degree is -0.08°; In this embodiment, the preparation method of modified nano zinc oxide is as follows: 90g of saponin extract, 40g of ethylene urea, 15g of N-aminoethyl-3-aminopropylmethyldimethoxysilane, and 200g of ethanol are added to 900g of water and stirred to obtain a mixed solution; then 100g of nano zinc oxide is added and stirred at a speed of 2h, centrifuged, and the precipitate is dried to obtain modified nano zinc oxide; In this embodiment, the antibacterial modified diatomaceous earth is prepared by the following method: 90g of chitosan is added to 1000g of 1% acetic acid aqueous solution and stirred to mix evenly, then 20g of sodium oleate and 80g of diatomaceous earth are added and stirred, centrifuged, and the precipitate is dried to obtain the antibacterial modified diatomaceous earth.

[0033] In this embodiment, the antioxidant is antioxidant 264.

[0034] In this embodiment, the dispersant is ethylene bisstearamide.

[0035] The ABS plastic prepared above was injected into the preparation equipment of Example 1 for drying.

[0036] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preparation device for nano antibacterial ABS plastic, characterized by: The invention comprises a drying cylinder (1) with two ends being connected, the drying cylinder (1) being symmetrically connected to gear plates (2) at the two opposite ends in a sealed and rotatable manner, the two gear plates (2) being connected to an air inlet hood (3) and an air outlet hood (4) at the sides away from each other in a sealed and rotatable manner, the tops of the air inlet hood (3) and the air outlet hood (4) being connected to an air inlet pipe (5) and an air outlet pipe (6) respectively, the two gear plates (2) being provided with a plurality of air vents (7) through the two gear plates (2), and a connecting rod (6) being fixedly connected between the centers of the two gear plates (2) A connecting shaft (8), the connecting shaft (8) having two opposite side walls symmetrically fixedly connected thereto with a lifting plate assembly (9), the two opposite ends of the lifting plate assembly (9) being respectively fixedly connected to two gear plates (2), and one end of the lifting plate assembly (9) away from the connecting shaft (8) being in contact with the inner wall of the drying cylinder (1), the inner wall of the air inlet cover (3) being fixedly connected to a fixing ring (10), the inner wall of the fixing ring (10) being provided with two sets of gear teeth (11) at intervals, and the two gear teeth (11) being provided with a plurality of identical gear teeth (112); The lifting plate assembly (9) comprises a mounting frame (91), and the mounting frame (91) is fixedly connected to the connecting shaft (8). A plurality of lifting plates (92) are rotatably connected between opposite ends of the inner wall of the mounting frame (91) at equal distances, and the cross-sections of both side walls of each lifting plate (92) are arc-shaped. One end of the rotating shaft of each lifting plate (92) passes through a gear plate (2) and is installed with a sprocket wheel (93), and the sprocket wheels (93) are connected by a chain (94). A rotating rod (95) is fixedly connected to the end of the rotating shaft of one of the lifting plates (92), and a rotating gear (96) meshing with the gear tooth group (11) is fixedly connected to the outer wall of the rotating rod (95); The invention also comprises a support frame (12), wherein a driving motor (13) is installed inside the support frame (12), an output end of the driving motor (13) is connected to a driving shaft (14), an outer wall of the driving shaft (14) is fixedly connected to two driving gears (15) which mesh with the gear plate (2), and the support frame (12) is connected to the drying cylinder (1), the air inlet hood (3) and the air outlet hood (4) via a fixing block (16).

2. The preparation equipment of a nano antibacterial ABS plastic according to claim 1, characterized in that: One end of the connecting shaft (8) passes through a gear plate (2) and is rotatably connected to a fixed shaft (17), and the fixed shaft (17) is fixedly connected to the inner wall of the air outlet hood (4). A reciprocating thread groove (18) is formed on the outer wall of the fixed shaft (17), and a sliding plate (19) is threadedly connected to the outer wall of the reciprocating thread groove (18). A thimble (20) cooperating with the vent hole (7) is provided on a side of the sliding plate (19) close to the gear plate (2). A limiting rod (21) is fixedly connected to a side of the gear plate (2) close to the air outlet hood (4), and the limiting rod (21) passes through the sliding plate (19) and is slidably connected to the sliding plate (19).

3. The preparation equipment of a nano antibacterial ABS plastic according to claim 1, characterized in that: The connecting shaft (8) is a structure with a hollow interior and two through-holes, and one end of the connecting shaft (8) passes through the air outlet hood (4). A first feed port (22) is provided on the side wall of the connecting shaft (8). An electric cylinder (23) is fixedly connected to the outer wall of the air inlet hood (3). The telescopic end of the electric cylinder (23) passes through the air inlet hood (3) and is rotatably connected to a feed shaft (24). The feed shaft (24) is inserted into the inner cavity of the connecting shaft (8) and is slidably connected to the inner wall of the connecting shaft (8). The free end of the feed shaft (24) is a through structure. A second feed port (25) cooperating with the first feed port (22) is provided on the side wall of the feed shaft (24), and the first feed port (22) and the second feed port (25) are staggered during drying.

4. The preparation equipment of a nano antibacterial ABS plastic according to claim 3, characterized in that: The inner wall of the feeding shaft (24) is provided with a spiral feeding blade (26).

5. The preparation equipment of a nano antibacterial ABS plastic according to claim 3, characterized in that: The first feed openings (22) are arranged in three groups, and the three groups of first feed openings (22) are arranged along the length direction of the connecting shaft (8).

6. The preparation equipment of a nano antibacterial ABS plastic according to claim 3, characterized in that: The inner wall of the connecting shaft (8) is provided with a limiting groove along the length direction, and the outer wall of the feeding shaft (24) is provided with a limiting strip that cooperates with the limiting groove, and the length of the limiting strip is less than the length of the limiting groove.

7. The preparation equipment of a nano antibacterial ABS plastic according to claim 3, characterized in that: The two rotating rods (95) are telescopic structures, the free ends of the rotating rods (95) are fixedly connected to the connecting rods (27) via the first bearing, and the free ends of the connecting rods (27) are rotatably connected to the outer wall of the telescopic end of the electric cylinder (23) via the second bearing.

8. The preparation equipment of nano antibacterial ABS plastic according to claim 1, characterized in that: The gear tooth set (11) comprises an arc-shaped strip (111) matching with the fixing ring (10); the fixing ring (10) is provided with a slide groove (101) matching with the arc-shaped strip (111); a side of the arc-shaped strip (111) passing through the fixing ring (10) is provided with a plurality of gear teeth (112); a side of the arc-shaped strip (111) away from the gear plate (2) is provided with an arc-shaped limiting groove (102); the arc-shaped strip (111) is threadedly connected with a locking bolt (113), and the locking bolt (113) abuts against the surface of the arc-shaped limiting groove (102).

9. The preparation equipment of nano antibacterial ABS plastic according to claim 1, characterized in that: A feed hopper (28) with an end cover is arranged at the top of the drying cylinder (1), an openable discharge door (29) is arranged at the bottom of the drying cylinder (1), and an inclined material guide plate (30) is arranged inside the support frame (12).

10. A method for preparing nano antibacterial ABS plastic, characterized in that: The following steps are involved: S1: Raw material mixing: weigh the raw materials according to the ratio, and mix them evenly to obtain a mixed raw material, and the ratio of the raw materials is: ABS 90-110 parts, dispersant 2-5 parts, composite antibacterial agent 3-6 parts, antioxidant 2-5 parts, wherein the composite antibacterial agent is a mixture of modified diatomaceous earth and modified nano zinc oxide according to the mass ratio of (1-3): (1-2); S2: The mixed raw materials are placed in a twin-screw extruder for melt extrusion, cooling, granulation, and drying to obtain nano antibacterial ABS plastic, and the drying process is performed by the preparation equipment described in any one of claims 1 to 9.

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