Antibacterial plastic and preparation method thereof
Through the innovative design of the antibacterial plastic preparation device, the problems of antibacterial agent powder blockage and uneven mixing have been solved, realizing the efficient and uniform production of antibacterial plastics and improving the reliability and production stability of the equipment.
Patent Information
- Application Number
- CN202511639716.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-01-02
AI Technical Summary
In the existing antibacterial plastic production process, the antibacterial agent powder is prone to clogging and uneven mixing, resulting in poor production continuity and stability. In addition, the existing equipment has a complex structure, high energy consumption, or is inconvenient to clean.
An antibacterial plastic preparation device is used. Through the synergistic action of components such as screw, conical inclined plate, discharge plate and V-shaped bar, the antibacterial agent is slowly and intermittently fed and multidimensionally moved, which breaks up the powder accumulation and ensures smooth feeding and uniform mixing.
This achieves uniform dispersion of antibacterial agents, improves production continuity and equipment reliability, reduces mixing difficulty and energy consumption, and ensures uniformity and efficient production of antibacterial plastic components.
Smart Images
Figure CN121246064A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of plastic preparation, and particularly relates to an antibacterial plastic and a preparation method thereof. BACKGROUND
[0002] In the production process of the antibacterial plastic, the adding mode of the antibacterial agent directly determines the uniformity of the antibacterial component distribution and the mixing efficiency of the final product. The traditional production process usually adopts a mode of directly adding the antibacterial agent powder into a mixing container at one time. This mode is prone to cause the powder to concentrate and fall in a short time, forming a 'waterfall effect', so that the antibacterial agent and the plastic resin base material are difficult to be fully mixed, especially when the powder particle size is small or the powder is easy to adsorb moisture, the powder is prone to arching and bridging in the silo, further aggravating the poor discharge problem, and affecting the continuity and stability of the production.
[0003] In the prior art, in order to solve the powder blocking problem, some equipment adopts mechanical stirring or vibration auxiliary discharge structure, but such devices often have the shortcomings of complex structure, high energy consumption or inconvenient cleaning. For example, some equipment promotes the flow of the powder by an external vibration motor, but the vibration may cause the powder to be dusted, causing environmental pollution and raw material loss, and the vibration also has an adverse effect on the long-term reliability of the equipment structure. SUMMARY
[0004] Therefore, the application aims to solve the technical problem of providing an antibacterial plastic and a preparation method thereof, which can slowly and continuously add the antibacterial agent in the preparation process of the antibacterial plastic, reduce the mixing difficulty, and ensure the continuity of the production.
[0005] An antibacterial plastic preparation device, comprising a conveying shell, a screw rod rotatably connected in the conveying shell, a cylindrical barrel fixedly connected to the conveying shell, a conical inclined plate fixedly connected to the cylindrical barrel, a movable circular ring slidably connected in the conical inclined plate, a loosening cone connected to the movable circular ring, and a discharging plate A fixedly connected in the cylindrical barrel.
[0006] Further comprising a plurality of V-shaped rods fixedly connected to the loosening cone, and a vertical rod fixedly connected between each V-shaped rod and the rectangular groove.
[0007] Further comprising a discharging plate B connected in the cylindrical barrel, which can rotate about a virtual axis.
[0008] Further comprising an upper plate fixedly connected to the conical inclined plate, a second motor fixedly connected to the upper plate, a threaded rod fixedly connected to the output shaft of the second motor, and a lead screw transmission between the threaded rod and the loosening cone.
[0009] The antibacterial plastic preparation device is used for an antibacterial plastic preparation method, which comprises the following steps:
[0010] Step one: add plastic resin raw material into the mixing container, and pour the antibacterial agent powder into the conical chute of the device;
[0011] Step two: start the first motor to drive the screw rod to rotate. At the same time, start the second motor to drive the threaded rod to rotate, thereby driving the blanking plate B to rotate and controlling the blanking rate, and at the same time, the loosening conical chute reciprocates up and down through the screw transmission;
[0012] Step three: the antibacterial agent powder is guided by the conical chute and slowly and intermittently falls into the conveying shell under the control of the blanking plates A and B;
[0013] Step four: the powder is transported to the left by the screw rod. By controlling the sliding of the transverse slide, the arc baffle gradually opens the discharge port and changes the powder falling point position;
[0014] Step five: in the mixing container, first stir at a low speed of 40-80 r / min for 10-15 minutes to preliminarily mix the antibacterial agent with the resin, and then stir at a high speed of 300-400 r / min for 3-5 minutes to realize uniform dispersion;
[0015] Step six: add the compatibilizer, lubricant, dispersant and crosslinking agent and mix them thoroughly, then send the uniformly mixed material into the screw extruder, melt mix, extrude, cool, pull and cut and granulate at a temperature of 240-260℃, and finally obtain antibacterial plastic particles. BRIEF DESCRIPTION OF DRAWINGS
[0016] The application will be further described in detail below in combination with the drawings and specific implementation methods.
[0017] Figure 1 and Figure 2 It is a schematic diagram of the overall structure of an antibacterial plastic preparation device;
[0018] Figure 3 It is a schematic diagram of the structure of the conveying shell;
[0019] Figure 4 It is a schematic diagram of the structure of the conical chute;
[0020] Figure 5 It is a schematic diagram of the structure of the knocking plate;
[0021] Figure 6 It is a schematic diagram of the structure of the loosening conical chute;
[0022] Figure 7 It is a schematic diagram of the cross-sectional structure of the screw rod;
[0023] Figure 8 It is a schematic diagram of the structure of the moving ring;
[0024] Figure 9 It is a schematic diagram of the structure of the blanking plate B;
[0025] Figure 10 Structure diagram of the lateral slide;
[0026] Figure 11 Structure diagram of the lateral slide in another direction;
[0027] Figure 12 Structure diagram of the fixed seat;
[0028] Figure 13 Structure diagram of the auxiliary rod;
[0029] Figure 14 Structure diagram of the contact head;
[0030] Figure 15 Structure diagram of the cross-sectional structure of the conveying shell;
[0031] Figure 16 Structure diagram of the cross-sectional structure of the lateral slide. DETAILED DESCRIPTION
[0032] The utility model provides an antibacterial plastic preparation device, including conveying shell 101, the screw rod 103 is rotatably connected in conveying shell 101, and the cylindrical barrel 201 is fixedly connected on conveying shell 101, and the conical inclined plate 202 is fixedly connected on cylindrical barrel 201, and the moving ring 402 is slidably connected in conical inclined plate 202, and the loose conical 401 is connected on moving ring 402, and the first motor 105 that can drive screw rod 103 rotation is fixedly connected on conveying shell 101, and the blanking plate A 204 is fixedly connected in cylindrical barrel 201, and the rectangular slot 405 is formed on moving ring 402, and one rectangular rod is fixedly connected in cylindrical barrel 201, and the up-down sliding effect of moving ring 402 is realized through the cooperation of rectangular rod and rectangular slot 405.
[0033] Conveying shell 101 is connected above the container for mixing and stirring, antibacterial agent powder is poured into conical inclined plate 202, and the antibacterial agent powder is guided into cylindrical barrel 201 by conical inclined plate 202, then continuously descends in cylindrical barrel 201 until enters conveying shell 101 through multiple through holes on blanking plate A 204, in the process, the first motor 105 is started to make the first motor 105 drive screw rod 103 to rotate, and the powder is conveyed in conveying shell 101 from right to left by screw rod 103 rotation, until the powder is conveyed to the notch position formed on the left side of conveying shell 101, then the powder automatically falls from the notch position and is added to the container to be uniformly mixed with the plastic resin raw material in the container, forming the finished antibacterial plastic;
[0034] The blanking plate A204 can make the powder slowly enter the conveying shell 101, and change the concentrated falling of the powder into a dispersed and slow addition, so as to prevent the powder from directly entering the conveying shell 101 for conveying after the worker pours the powder, so as to prevent the powder from being added into the container in a concentrated manner, thereby increasing the mixing difficulty and affecting the mixing efficiency. The gradual feeding mode avoids the mixing burden caused by the large amount of powder flowing into the mixing container in a short time, and enables the powder to gradually fall from the plurality of through holes and then slowly added as a whole by the rotation of the screw 103, thereby improving the mixing effect.
[0035] During the falling of the powder, the movable circular ring 402 slides up and down in the cylindrical barrel 201, and the movable circular ring 402 drives the loosening conical body 401 to move up and down synchronously. During the process, the movable circular ring 402 and the loosening conical body 401 push the powder, break the accumulation or bridging phenomenon formed by the mutual extrusion of the powder, and enable the powder to move actively in the cylindrical barrel 201, so as to prevent the powder from being blocked and unable to fall through the plurality of through holes of the blanking plate A204, that is, to break the adsorption force between the powder to ensure smooth feeding, so that the powder adding operation can be slowly performed according to the expected setting, the purpose of efficient and uniform mixing is achieved, and the plastic material with uniformly distributed antibacterial components is produced.
[0036] The plurality of V-shaped rods 404 are fixed on the loosening conical body 401, and the plurality of V-shaped rods 404 are uniformly distributed in the circumferential direction on the loosening conical body 401. Each V-shaped rod 404 is fixed with a vertical rod 403 between the V-shaped rod 404 and the rectangular groove 405.
[0037] The plurality of V-shaped rods 404 and the plurality of vertical rods 403 uniformly distributed in the circumferential direction can expand the active pushing effect on the powder, further enable the powder to be actively pushed and moved, improve the breaking effect of the adsorption force between the powder, and when the loosening conical body 401 moves up and down in the powder, the V-shaped rods 404 like a plurality of “tentacles” can penetrate and disturb a larger volume of powder layer, and can more effectively push the surrounding powder outward during the movement, thereby producing a strong shearing and destructive effect on the stable bridging or arching structure formed in the powder, greatly promoting the loosening and flow of the powder.
[0038] The V-shaped rod 404 is not only a static stirring rod, but when it moves up and down with the movable circular ring 402, the V-shaped structure can guide the powder to produce more complex multidimensional motion, such as vertical displacement and radial flow caused by the V-shaped slope. The dynamic loosening effect is more efficient than the simple vertical insertion rod, and can more thoroughly break the adsorption force and electrostatic force between the powder particles, so as to ensure smooth feeding.
[0039] The plurality of vertical rods 403 can effectively support the plurality of V-shaped rods 404, avoid the one end of the plurality of V-shaped rods 404 being suspended, and make the plurality of V-shaped rods 404 deform due to fatigue after long-term use, affect the service life of the equipment, firmly connect the root of the V-shaped rod 404 with the moving ring 402, and effectively transmit the resistance generated by the powder to the V-shaped rod 404 to the moving ring 402 during work. This design changes the V-shaped rod 404 from a dangerous cantilever beam structure to a stable simply supported beam or rigid frame structure, significantly reduces the bending stress and deformation risk of the root of the V-shaped rod 404, fundamentally avoids the deformation or fracture problem caused by metal fatigue, and greatly improves the reliability and service life of the equipment.
[0040] The blanking plate B303 connected in the cylindrical barrel 201 can rotate around a virtual axis. The blanking plate B303 is closely arranged with the blanking plate A204 and located on the upper side of the blanking plate A204.
[0041] The arrangement of the blanking plate B303 makes the falling of the powder more slow and controllable. During operation, the blanking plate B303 can be operated to rotate. When the plurality of through holes on the blanking plate B303 and the plurality of through holes on the blanking plate A204 appear through space, the powder will fall smoothly into the conveying shell 101 for conveying, that is, when the through holes of the two plates are completely staggered, the blanking passage is basically closed; when the through holes are completely aligned, the blanking passage is completely opened; and by controlling the rotation angle, any intermediate state of partial overlap of the through holes can be realized. This design is essentially a stepless adjustable mechanical valve, which can realize continuous and precise control of the powder blanking flow. Compared with a simple on-off valve, it enables the operator to set the powder adding speed at an optimal and extremely slow rate according to the process requirements, thereby fundamentally ensuring that the antibacterial agent can be gradually added to the main material and significantly reducing the difficulty of subsequent mixing.
[0042] The blanking plate B303 rotating at the same time can also assist in driving the powder to move in the conical inclined plate 202. The edge and through hole of the plate body will produce shearing and disturbance effect on the powder above. This movement can effectively destroy the "bridge" or "arch plug" phenomenon of the powder formed near the blanking port due to electrostatic force, moisture absorption, etc. It is complementary to the up-down movement of the loosening cone 401 and the V-shaped rod 404, and constitutes a multi-dimensional and active anti-blocking system: the loosening cone solves the compaction in the vertical direction, and the rotating blanking plate B solves the adhesion and accumulation in the horizontal direction, which double guarantees the smooth blanking and further eliminates the accumulation or bridging phenomenon of the powder, so that the powder can more smoothly fall through the plurality of through holes on the blanking plate B303 and the plurality of through holes on the blanking plate A204 to complete the processing.
[0043] Further comprising an upper plate 203 fixed on the conical inclined plate 202, the second motor 301 is fixed on the upper plate 203, the output shaft of the second motor 301 is fixed with a threaded rod 302, and the threaded rod 302 is in screw transmission with the loosening cone 401.
[0044] By starting the second motor 301, the output shaft of the second motor 301 is rotated, and in turn drives the threaded rod 302 to rotate, the threaded rod 302 drives the blanking plate B 303 to rotate, and in turn makes the blanking plate B 303 cooperate with the blanking plate A 204 to realize the effect of slow addition of powder and drive the powder to move to eliminate the accumulation situation;
[0045] At the same time, the rotation of the threaded rod 302 can provide driving force for the loosening cone 401, so that the moving ring 402 slides in the conical inclined plate 202 under the limiting of the rectangular rod, and the output shaft of the second motor 301 rotates regularly, completes the driving of the moving ring 402 to slide up and down reciprocatingly, and makes the loosening cone 401 push the powder for many times;
[0046] At the same time, the operation of rotating the threaded rod 302 can realize the effects of driving the blanking plate B 303 to rotate and driving the loosening cone 401 and the moving ring 402 to slide up and down reciprocatingly, and this setting makes the rotation speed of the blanking plate B 303 positively related to the up and down sliding speed of the loosening cone 401, that is, the faster the blanking plate B 303 rotates, the faster the loosening cone 401 slides up and down, and vice versa.
[0047] When the blanking plate B 303 rotates quickly, the single time of the through space between the through hole on the blanking plate B 303 and the through hole on the blanking plate A 204 is shortened, and in turn the powder dropping process is further slowed down or even disappears, at this time, the loosening cone 401 slides up and down quickly, which can generate high frequency disturbance, the high frequency disturbance can continuously break the adsorption force initially formed between the powder particles, effectively prevent the bridging trend of the powder due to long static time under low flow, play a kind of active and preventive anti-blocking role, and ensure the smoothness of micro feeding.
[0048] When the blanking plate B 303 rotates slowly, the single time of the through space between the through hole on the blanking plate B 303 and the through hole on the blanking plate A 204 is extended, and the powder dropping process is accelerated, at this time, the loosening cone 401 slides up and down slowly, which can make the rising or falling action of the loosening cone 401 more powerful, and the mechanical thrust generated thereby can more effectively act on the deep layer of the powder, and can effectively break the more solid arch or compacted area which may be formed due to large flow and high flow rate of the powder, and ensure the smoothness of the powder under large flow.
[0049] Further comprising a transverse slide 501 connected to the conveying shell 101 in a sliding manner, the transverse slide 501 is fixedly connected with a circular arc baffle 503, the circular arc baffle 503 can shield the notch opened on the conveying shell 101, and the conveying shell 101 is fixedly connected with an electric push rod capable of driving the transverse slide 501 to slide.
[0050] During the powder adding process, the transverse slide 501 can be gradually operated to slide to the right on the conveying shell 101, so that the circular arc baffle 503 gradually releases the notch, allowing the powder to fall through the notch on the lower side of the conveying shell 101. As the transverse slide 501 gradually slides to the right, the exposed space of the notch also extends to the right. Since the powder always falls out along the rightmost side of the notch, the initial position of the powder falling into the container can be changed, i.e. the falling position of the powder falling out of the device can be changed. This dynamic feeding method allows the powder to be evenly distributed in different areas of the lower mixing container, rather than accumulating in one place, providing an important guarantee for the uniformity of the initial mixing stage and further facilitating subsequent uniform mixing operations.
[0051] The movement of the circular arc baffle 503 is not simply on or off, but realizes a gradual and controllable exposure process. By controlling the advancing speed of the electric push rod, the growth rate of the exposed area of the notch can be accurately adjusted, which cooperates with the slow feeding effect described above to form a complete flow control chain from the input end to the output end, ensuring that the antibacterial agent powder can be added to the main material at an ideal speed and distribution pattern, which greatly reduces the burden of the subsequent main mixing process and significantly reduces the risk of agglomeration caused by excessive local concentration, thereby providing key technical support for the final preparation of high-quality antibacterial plastics with highly uniform dispersion of antibacterial components.
[0052] The transverse slide 501 is rotatably connected with a plurality of knocking rods 502, the plurality of knocking rods 502 are rotatably connected with the transverse slide 501 through a rotating shaft, a torsional spring 504 is fixedly connected between each knocking rod 502 and the transverse slide 501, an auxiliary rod 603 is connected to the conveying shell 101, a contact head 604 is connected to the auxiliary rod 603, a knocking plate 104 is fixedly connected to the conveying shell 101, and the plurality of knocking rods 502 are symmetrically arranged on the transverse slide 501 on the front and rear sides of the transverse slide 501.
[0053] In the process of the right sliding operation of the transverse slide 501 on the conveying shell 101, the plurality of knocking rods 502 will be in contact with the contact head 604 in turn. When the knocking rod 502 is in contact with the contact head 604, the contact head 604 will push the knocking rod 502 to rotate on the transverse slide 501. In this process, the knocking rod 502 will rotate against the torsional force of the torsional spring 504. When the knocking rod 502 is disengaged from the contact head 604, the torsional spring 504 will twist the knocking rod 502 to reverse rotation and reset. At this time, the knocking rod 502 will quickly reverse rotation and collide with the knocking plate 104, thereby causing the conveying shell 101 to vibrate due to the collision, so as to shake the powder adhering to the inner wall of the conveying shell 101 and the surface of the screw rod 103, thereby facilitating the overall discharge of the powder, avoiding waste of the powder and reducing the difficulty of subsequent cleaning and maintenance.
[0054] The above vibration operation will occur multiple times when the transverse slide 501 slides to the right, thereby effectively improving the vibration cleaning effect of the powder.
[0055] In actual use, the two knocking rods 502 located at the far right in the plurality of knocking rods 502 will leave a relatively far distance from the circular arc baffle 503, so as to ensure that the powder falling from the slot will not adhere to the knocking rod 502, and under the premise of ensuring the knocking effect, the powder can normally fall.
[0056] The contact head 604 is slidably connected to the auxiliary rod 603, a compression spring is fixed between the contact head 604 and the auxiliary rod 603, the left side of each knocking rod 502 is fixed with a bevel portion 505, a plurality of stop blocks are arranged on the transverse slide 501, a protruding strip is arranged on the rotating shaft of each knocking rod 502, and the plurality of stop blocks can block the plurality of protruding strips, so that when the transverse slide 501 slides to the left, the plurality of knocking rods 502 will not be reversed by the contact head 604, and the lower side of the contact head 604 is provided with a circular arc chamfer.
[0057] Due to the arrangement of the stop blocks and the protruding blocks, when the transverse slide 501 slides to the left, the plurality of knocking rods 502 will not rotate, so that when the transverse slide 501 slides to the left, the bevel portion 505 will actively push the contact head 604 to slide upward on the auxiliary rod 603 against the elastic force of the compression spring, so that the contact head 604 can be disengaged from the knocking rod 502, and the transverse slide 501 can be smoothly reset to the left to complete the subsequent multiple left-right reciprocating sliding effect.
[0058] Further comprising a fixed seat 102 fixed on the conveying shell 101, a rotating rod 602 is rotatably connected to the fixed seat 102, the auxiliary rod 603 is rotatably connected to the rotating rod 602, the rotating rod 602 and the auxiliary rod 603 are eccentrically arranged, and the rotating rod 602 and the threaded rod 302 are driven by the belt 601.
[0059] When the rotating rod 602 rotates, the auxiliary rod 603 can be driven to rotate eccentrically, and the auxiliary rod 603 can drive the multiple knocking rods 502 symmetrically arranged in front and back to rotate and knock in the process, so that the auxiliary rod 603 can drive the knocking rods 502 on the front and back sides to have different amplitude knocking effects, that is, the front auxiliary rod 603 has a small-angle knocking effect, the rear auxiliary rod 603 has a large-angle knocking effect, or the front auxiliary rod 603 has a large-angle knocking effect and the rear auxiliary rod 603 has a small-angle knocking effect, so that the knocking effect is more diversified. The asymmetric excitation makes the direction and energy of the impact force generated by each knocking different, thereby exciting a more complex vibration mode on the conveying shell 101, avoiding the dead angle that may exist in single-frequency vibration, and further facilitating the knocking of the adhered powder down, and the rotation of the rotating rod 602 can further change the knocking amplitude, further enriching the knocking effect.
[0060] Meanwhile, the setting of the belt 601 enables the rotation of the threaded rod 302 to be transmitted to the rotating rod 602, so that the rotation of the rotating rod 602 does not need to be provided with another power source, thereby facilitating subsequent operation and maintenance operations.
[0061] The antibacterial plastic preparation device is used for the preparation method of the antibacterial plastic, and the method comprises the following steps:
[0062] Step one: add plastic resin raw materials into a mixing container, and pour antibacterial agent powder into the conical chute 202 of the device;
[0063] Step two: start the first motor 105 to drive the screw rod 103 to rotate, and simultaneously start the second motor 301 to drive the threaded rod 302 to rotate, thereby driving the blanking plate B 303 to rotate and controlling the blanking rate, and simultaneously driving the loosening conical body 401 to reciprocate up and down through the lead screw transmission;
[0064] Step three: the antibacterial agent powder is guided by the conical chute 202 and slowly and intermittently falls into the conveying shell 101 under the control of the blanking plates A 204 and B 303;
[0065] Step four: the powder is conveyed to the left by the screw rod 103. By controlling the sliding of the transverse sliding frame 501, the arc baffle 503 is gradually opened to the discharge port, and the powder falling position is changed;
[0066] Step five: in the mixing container, first, stir at a low speed of 80 r / min for 15 minutes to preliminarily mix the antibacterial agent with the resin, and then stir at a high speed of 400 r / min for 5 minutes to realize uniform dispersion;
[0067] Step six: after the compatible agent, the lubricant, the dispersing agent and the crosslinking agent are added and fully mixed, the uniformly mixed material is sent into the screw extruder, and the antibacterial plastic particles are finally obtained through melting mixing, extrusion, cooling, traction and cutting granulation at a temperature of 260°C.
[0068] The antibacterial plastic prepared by the antibacterial plastic preparation method comprises the following raw materials in parts by weight: 80 parts of polypropylene resin, 8 parts of silver ion antibacterial agent, 5 parts of compatibility agent, 0.6 part of lubricant, 0.6 part of dispersant and 0.7 part of crosslinking agent.
Claims
1. An antibacterial plastic preparation apparatus, characterized in that, It includes a conveyor shell, a screw rotatably connected inside the conveyor shell, a cylindrical barrel fixed to the conveyor shell, a conical inclined plate fixed to the cylindrical barrel, a movable ring slidably connected inside the conical inclined plate, a loose cone connected to the movable ring, and a discharge plate A fixed inside the cylindrical barrel.
2. The antibacterial plastic preparation apparatus according to claim 1, characterized in that, It also includes multiple V-shaped rods fixed to the loose cone, and each V-shaped rod is fixed to a vertical rod between itself and the rectangular groove.
3. The antibacterial plastic preparation apparatus according to claim 2, characterized in that, It also includes a material drop plate B connected inside the cylindrical barrel, which can rotate about a virtual axis.
4. The antibacterial plastic preparation apparatus according to claim 3, characterized in that, It also includes an upper plate fixed to the conical inclined plate, a second motor fixed to the upper plate, a threaded rod fixed to the output shaft of the second motor, and a screw drive between the threaded rod and the loosened cone.
5. The antibacterial plastic preparation apparatus according to claim 4, characterized in that, It also includes a transverse carriage that is slidably connected to the transport housing, and an arc-shaped baffle is fixed to the transverse carriage. The arc-shaped baffle can block the slots opened on the transport housing.
6. The antibacterial plastic preparation apparatus according to claim 5, characterized in that, Multiple striking rods are rotatably connected to the transverse slide, and each striking rod is fixedly connected to the transverse slide with a torsion spring. An auxiliary rod is connected to the transport shell, and a contact head is connected to the auxiliary rod. A striking plate is fixedly connected to the transport shell.
7. The antibacterial plastic preparation apparatus according to claim 6, characterized in that, The contact head is slidably connected to the auxiliary rod, and a compression spring is fixed between the contact head and the auxiliary rod. Each striking rod has a beveled part fixed to its left side.
8. The antibacterial plastic preparation apparatus according to claim 7, characterized in that, It also includes a fixed base fixed to the transport shell, a rotating rod rotatably connected to the fixed base, an auxiliary rod rotatably connected to the rotating rod, the rotating rod and the auxiliary rod being eccentrically set, and the rotating rod and the threaded rod being driven by a belt.
9. The method for preparing antibacterial plastics using the antibacterial plastic preparation apparatus according to claim 6, characterized in that, The method includes the following steps: Step 1: Add the plastic resin raw material to the mixing container, and pour the antibacterial agent powder into the conical inclined plate of the device; Step 2: Start the first motor to drive the screw to rotate. At the same time, start the second motor to drive the threaded rod to rotate, thereby rotating the blanking plate B and controlling the feeding rate. Simultaneously, the loosening cone reciprocates up and down through the lead screw drive. Step 3: The antibacterial agent powder is guided by a conical inclined plate and slowly and intermittently falls into the conveyor shell under the control of the dropping plates A and B; Step 4: The powder is conveyed to the left by the screw. By controlling the sliding of the transverse carriage, the arc-shaped baffle gradually opens the discharge port and changes the position of the powder landing point; Step 5: In the mixing container, first stir at a low speed of 40-80 r / min for 10-15 minutes to initially mix the antibacterial agent with the resin, and then stir at a high speed of 300-400 r / min for 3-5 minutes to achieve uniform dispersion. Step 6: After adding and thoroughly mixing the compatibilizer, lubricant, dispersant and crosslinking agent, feed the uniformly mixed material into a screw extruder and perform melt mixing, extrusion, cooling, traction and cutting granulation at a temperature of 240-260℃ to finally obtain antibacterial plastic granules.
10. The antibacterial plastic prepared using the antibacterial plastic preparation method according to claim 9, characterized in that, The antibacterial plastic comprises the following raw materials in parts by weight: 60-80 parts polypropylene resin, 5-8 parts silver ion antibacterial agent, 3-5 parts compatibilizer, 0.3-0.6 parts lubricant, 0.3-0.6 parts dispersant and 0.5-0.7 parts crosslinking agent.