A recycled polypropylene injection molding device

Abstract

The present invention relates to the field of injection molding technology, and discloses a recycled polypropylene injection molding device, including a conveying component and an injection molding component with a blanking component at the input end; a feed port is provided on the side of the blanking component; the conveying component includes a liquid collecting box with a liquid collecting cavity, one end of the liquid collecting box is fixedly connected to the side of the blanking component, the inner wall of the liquid collecting cavity is rotatably connected to a conveying plate for filtering recycled polypropylene materials through a rotating shaft, one end of the conveying plate passes through the feed port and is located in the blanking component, and a drying mechanism is also provided on the liquid collecting box; and also includes a drive component intermittently connected to an intermittent transmission component at the output end. The recycled polypropylene injection molding device reduces the independent processing steps and equipment for cleaning the recycled polypropylene after injection molding, can continuously perform injection molding and feeding work, simplifies the operation process, reduces the operation difficulty and time cost, and improves production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to a recycled polypropylene injection molding device. Background Art

[0002] Recycled polypropylene usually comes from waste plastic products, such as packaging bags, home appliance casings, etc. These sources inevitably carry dust, oil, metal particles or other impurities. Impurities may affect the uniformity and melting characteristics of polypropylene, thereby affecting the quality of injection molded products. Therefore, it is necessary to clean the recycled polypropylene before injection molding. Cleaning can effectively remove pollutants in the recycled polypropylene material and restore the recycled polypropylene material to a higher purity, laying a good foundation for subsequent processing links.

[0003] In traditional recycled polypropylene material injection molding equipment, the cleaned material usually needs to go through multiple independent steps for filtration, drying and transportation. These steps are often completed using different equipment, resulting in complex operation procedures and requiring multiple manual interventions and adjustments, which increases the difficulty of operation and time costs. Therefore, when traditional equipment processes recycled polypropylene materials, especially in an efficient and continuous production environment, there are problems such as high energy consumption and complex operation, resulting in low production efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a recycled polypropylene injection molding device, which reduces independent processing steps and equipment, can continuously perform injection molding and feeding work, simplifies the operation process, reduces the operation difficulty and time cost, and improves production efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] Design a recycled polypropylene injection molding device, including a conveying component and an injection molding component with a blanking component at the input end;

[0007] A feeding port is provided on the side of the blanking component;

[0008] The conveying assembly includes a liquid collecting box with a liquid collecting cavity, one end of the liquid collecting box is fixedly connected to the side of the material discharging assembly, the inner wall of the liquid collecting cavity is rotatably connected to a conveying plate for filtering and regenerating polypropylene material through a rotating shaft, one end of the conveying plate passes through a feed port and is located in the material discharging assembly, and a drying mechanism is also provided on the liquid collecting box;

[0009] It also includes a driving component with an intermittent transmission component intermittently connected to the output end. The driving component is connected to one end of the conveying plate located in the unloading component through the intermittent transmission component to drive the conveying plate to vibrate intermittently.

[0010] Optionally, the intermittent transmission assembly includes a transmission half gear, a transmission gear and a rocker mechanism, the transmission half gear is fixedly connected to the output end of the driving assembly, the transmission half gear is meshingly connected to the transmission gear, the end face of the transmission gear is rotatably connected to the power input end of the rocker mechanism, and the power output end of the rocker mechanism is rotatably connected to one end of the conveying plate located in the unloading assembly.

[0011] Optionally, the rocker mechanism includes a transmission rod and a swing rod, one end of the transmission rod is eccentrically connected to the end face of the transmission gear, the other end of the transmission rod is rotationally connected to one end of the swing rod, the middle part of the swing rod is rotationally connected to the inner side wall of the unloading component, and the other end of the swing rod is rotationally connected to one end of the conveying plate located in the unloading component through an opened slide groove.

[0012] Optionally, the drying mechanism includes a drying shell and a drying fan, the drying shell is a shell-like structure with one end open, the drying shell is detachably connected to the upper surface of the liquid collecting box by bolts, and the drying fan is arranged at the bottom of the groove of the drying shell and faces the conveying plate.

[0013] Optionally, the driving assembly includes a reed switch, a magnet is provided on the surface of the transmission half gear without tooth grooves, and the reed switch is connected in series in the circuit of the drying fan.

[0014] Optionally, the driving assembly includes a driving motor and a transmission, the driving motor is arranged on the side of the blanking assembly, and the output end of the driving motor is connected to the end face of the transmission half gear through the transmission to drive the transmission half gear to rotate.

[0015] Optionally, the material discharge assembly includes a material discharge box and a material discharge hopper, the cross-section of the material discharge hopper is set in an inverted trapezoidal shape, one end of the material discharge box is communicated with the end of the material discharge hopper with a larger opening, and the end of the material discharge hopper with a smaller opening is connected to the input end of the injection molding assembly, the feed port is opened on the side of the material discharge box, and one end of the liquid collecting box is fixedly connected to the side of the material discharge box and is located outside the feed port.

[0016] Optionally, the inner top wall and the inner bottom wall of the material discharge box located at the feed port are both provided with a spring, and one end of the spring is in contact with the conveying plate.

[0017] Optionally, the inner wall of the lower hopper is rotatably connected to a dispersion plate, and the end face of the transmission half gear is connected to the dispersion plate through a timing belt to drive the dispersion plate to rotate.

[0018] Optionally, a filter plate is detachably connected to the surface of the conveying plate via bolts, and a filter screen is provided on the surface of the filter plate.

[0019] The present invention provides a recycled polypropylene injection molding device, which has the following beneficial effects:

[0020] The recycled polypropylene injection molding device carries and filters the cleaned recycled polypropylene material through a conveying plate, collects the dripping liquid and impurities filtered by the recycled polypropylene material through a liquid collecting chamber provided in a liquid collecting box, and the driving component cooperates with the intermittent transmission component to make one end of the conveying plate vibrate intermittently. Through the vibration of the conveying plate, the recycled polypropylene material will flip and move on the conveying plate, and the drying mechanism is cooperated with the drying mechanism during the flipping process to achieve better drying effect and higher drying efficiency. At the same time, the impurities attached to the recycled polypropylene material can be shaken off, ensuring that the recycled polypropylene material is evenly dried and fully filtered, and then the material is passed through one end of the feed inlet through the conveying plate. The materials are transported to the unloading component, and then collected by the unloading component and transported to the injection molding component for injection molding. The intermittent transportation can give the recycled polypropylene material enough drying time. Compared with the continuously running equipment, the intermittent operation mode can significantly reduce energy consumption, improve the energy utilization efficiency of the device, and avoid excessive backlog of materials in the unloading component, prevent accumulation and blockage. Through the intermittent vibration of the conveying plate and the cooperation of the drying mechanism, the automatic filtering, drying and transportation of the recycled polypropylene material are realized, the independent processing steps and equipment are reduced, the injection molding feeding work can be carried out continuously, the operation process is simplified, the operation difficulty and time cost are reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the recycled polypropylene injection molding device of the present invention;

[0022] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the recycled polypropylene injection molding device of the present invention;

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the intermittent transmission assembly in the present invention;

[0024] Figure 4 It is a side cross-sectional structural schematic diagram of the recycled polypropylene injection molding device of the present invention;

[0025] Figure 5 For the present invention Figure 3 Schematic diagram of the enlarged structure of part A.

[0026] In the figure: 100, conveying assembly; 110, liquid collecting box; 120, liquid collecting chamber; 130, conveying plate; 140, drying mechanism; 141, drying shell; 142, drying fan; 150, filter plate; 200, injection molding assembly; 300, unloading assembly; 310, unloading box; 320, unloading hopper; 330, dispersion plate; 340, spring; 400, driving assembly; 410, reed switch; 420, driving motor; 430, magnet; 500, intermittent transmission assembly; 510, transmission half gear; 520, transmission gear; 530, rocker mechanism; 531, transmission rod; 532, swing rod; 533, slide; 540, timing belt. DETAILED DESCRIPTION

[0027] 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. All other embodiments obtained by ordinary technicians in the field without making creative work based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

[0028] See also Figures 1 to 5 , the present invention provides a technical solution: a recycled polypropylene injection molding device, comprising a conveying component 100 and an injection molding component 200 with a blanking component 300 provided at the input end;

[0029] A feeding port is provided on the side of the material discharge assembly 300;

[0030] The conveying assembly 100 includes a liquid collecting box 110 with a liquid collecting chamber 120, one end of the liquid collecting box 110 is fixedly connected to the side of the material discharging assembly 300, the inner wall of the liquid collecting chamber 120 is rotatably connected to a conveying plate 130 for filtering and regenerating polypropylene materials through a rotating shaft, one end of the conveying plate 130 passes through a feed port and is located in the material discharging assembly 300, and a drying mechanism 140 is also provided on the liquid collecting box 110;

[0031] It also includes a driving assembly 400 whose output end is intermittently connected to an intermittent transmission assembly 500, and the driving assembly 400 is connected to one end of the conveying plate 130 located in the unloading assembly 300 through the intermittent transmission assembly 500, and is used to drive the conveying plate 130 to vibrate intermittently;

[0032] When the conveying plate 130 vibrates, one end will swing, and the height of the swing is below the horizontal plane, that is, the conveying plate 130 is set at an angle, and the height of the output end is lower than the height of the input end, that is, the end of the conveying plate 130 located in the unloading component 300 is lower than the end rotatably connected to the liquid collecting chamber 120. Through rapid swinging (i.e. vibration), the recycled polypropylene material placed on it can move along the inclined direction. After cleaning the recycled polypropylene material, the staff directly places it on the end of the conveying plate 130 rotatably connected to the liquid collecting chamber 120. With intermittent vibration, the recycled polypropylene material is filtered, turned over and moved to ensure that the material is evenly dried and fully filtered. The unloading component 300 receives the recycled polypropylene material that has been dried and filtered on the conveying plate 130 through the feed port to ensure that the material enters stably. The injection molding component 200 is connected to the unloading component 300 to receive the recycled polypropylene material after drying and filtration for injection molding, integrating cleaning, filtration, drying and injection molding in one device, reducing independent processing steps and equipment, simplifying the operation process, reducing the operation difficulty and time cost, and ensuring that the recycled polypropylene material is completely free of moisture before entering the injection molding component 200 through the efficient drying of the drying mechanism 140, thereby avoiding the influence of moisture on the injection molding quality and improving the stability and consistency of the product. The driving component 400 cooperates with the intermittent transmission component 500 to intermittently transmit the conveying plate 130, which not only provides sufficient drying time, but also avoids the accumulation of materials in the unloading component 300, and effectively avoids the situation of clogging the output end of the unloading component 300.

[0033] In this embodiment, as a preferred solution, the intermittent transmission assembly 500 includes a transmission half gear 510, a transmission gear 520 and a rocker mechanism 530. The transmission half gear 510 is fixedly connected to the output end of the driving assembly 400, the transmission half gear 510 is meshedly connected with the transmission gear 520, the end surface of the transmission gear 520 is rotatably connected to the power input end of the rocker mechanism 530, and the power output end of the rocker mechanism 530 is rotatably connected to one end of the conveying plate 130 located in the unloading assembly 300;

[0034] The driving assembly 400 intermittently transmits power to the transmission gear 520 through the transmission half gear 510. Since only a part of the transmission half gear 510 has gears and the other part is toothless, intermittent transmission can be achieved instead of continuous transmission, ensuring that the transmission gear 520 can obtain power at specific time intervals and remain stationary at the rest of the time, thereby achieving intermittent transmission. The transmission gear 520 transmits intermittent rotational motion to the rocker mechanism 530 by meshing with the transmission half gear 510. The transmission gear 520 will rotate when obtaining power, thereby driving the rocker mechanism 530 connected to its end face. Through the rotation and stopping of the transmission gear 520, the movement frequency and rhythm of the rocker mechanism 530 can be controlled to achieve intermittent driving of the conveying plate 130. The rocker mechanism 530 converts the rotational motion of the transmission gear 520 into reciprocating motion and transmits this reciprocating motion to the conveying plate 130. The design of the rocker mechanism 530 can effectively convert rotational motion into linear or swinging motion. The reciprocating motion of the rocker mechanism 530 causes one end of the conveying plate 130 to intermittently vibrate and swing in the unloading assembly 300, thereby realizing the filtering, turning and moving of the recycled polypropylene material. The intermittent transmission ensures that the material will not be excessively accumulated or pass through too quickly during the conveying, filtering and drying processes. Each batch of materials can be fully processed, optimizing the entire processing rhythm, improving production efficiency and product quality, and being able to stop the equipment during the interval time when power transmission is not required, saving energy, reducing production costs, and improving overall economic benefits.

[0035] In this embodiment, as a preferred solution, the rocker mechanism 530 includes a transmission rod 531 and a swing rod 532. One end of the transmission rod 531 is eccentrically connected to the end surface of the transmission gear 520, and the other end of the transmission rod 531 is rotatably connected to one end of the swing rod 532. The middle part of the swing rod 532 is rotatably connected to the inner wall of the blanking component 300. The other end of the swing rod 532 is rotatably connected to one end of the conveying plate 130 located in the blanking component 300 through the provided slide groove 533. The eccentric rotation causes the transmission rod 531 to produce a periodic reciprocating swing when the transmission gear 520 rotates. Through the connection between the swing rod 532 and the transmission rod 531 , the transmission rod 531 can be one end of the swing rod 532 that swings, and the swing rod 532 is rotatably connected to the inner side wall of the blanking assembly 300, and can reciprocate with the rotation connection point between the swing rod 532 and the inner side wall of the blanking assembly 300 as the center of the circle, so that both ends of the swing rod 532 swing back and forth, and the other end of the swing rod 532 away from the transmission rod 531 is connected to the conveying plate 130, so that the conveying plate 130 is driven to swing back and forth, thereby forming vibration, and the frequency of the vibration depends on the rotation speed of the transmission gear 520. The diameter of the transmission gear 520 is smaller than the diameter of the transmission half gear 510, and the rotation frequency of the transmission gear 520 is relatively fast;

[0036] The slide groove 533 provided on the swing rod 532 is an elliptical hole, and its purpose is to play a compensation role, that is, when one end of the conveying plate 130 swings with the swing rod 532, the one end of the conveying plate 130 not only rotates relative to the slide groove 533, but also slides relative to the slide groove 533. By providing the slide groove 533, interference with the swing amplitude of the conveying plate 130 is avoided.

[0037] In this embodiment, as a preferred solution, the drying mechanism 140 includes a drying shell 141 and a drying fan 142. The drying shell 141 is a shell-shaped structure with an open end. The drying shell 141 is detachably connected to the upper surface of the liquid collecting box 110 by bolts. The drying fan 142 is arranged at the bottom of the groove of the drying shell 141 and faces the conveying plate 130. The shell design with an open end of the drying shell 141 forms a closed drying space after installation, which can concentrate and stabilize the hot air flow and avoid heat loss. The detachable connection design with bolts facilitates the disassembly and maintenance of the drying shell 141, the cleaning of internal impurities and the inspection of the drying fan 142, and the protection The drying fan 142 and the internal drying system are protected from external environmental influences, such as dust, moisture, etc., and are also protected from accidental touch by the operator. The drying fan 142 blows hot air to form a uniform heat flow, which quickly evaporates the moisture in the recycled polypropylene material on the conveying plate 130. A heating tube is provided on the drying shell 141 above the drying fan 142. The drying fan 142 and the heating tube are both existing well-known technologies and are only used for reference. The drying fan 142 is directed toward the conveying plate 130 to ensure that the hot air is concentrated on the surface of the material, thereby improving the drying efficiency. The drying fan 142 blows evenly to avoid uneven drying, thereby ensuring that the processing effect of each batch of materials is consistent.

[0038] In this embodiment, as a preferred solution, the drive assembly 400 includes a reed switch 410, and a magnet 430 is provided on the surface of the transmission half gear 510 without a tooth groove. The reed switch 410 is connected in series in the circuit of the drying fan 142. The reed switch 410 is an existing well-known technology and is only cited here. The purpose is to cooperate with the rotation of the transmission half gear 510 and the magnetic force of the magnet 430 to control the intermittent operation of the drying fan 142 to avoid the continuous operation of the drying fan 142 to cause thermal oxidation degradation of the recycled polypropylene material (recycled polypropylene will undergo thermal oxidation degradation when exposed to high temperature conditions for a long time, especially the molecular chain of the recycled material may have undergone multiple processing and stability The recycled polypropylene material is more susceptible to chemical corrosion and aging caused by environmental influences, which will have an adverse effect on the mechanical properties, heat resistance and chemical stability of the recycled polypropylene material. Therefore, intermittent operation is used to achieve drying while avoiding excessive heating. Recycled polypropylene usually contains a certain amount of moisture. The purpose of drying is to remove excess moisture, but if drying is continued, the moisture content may be too low, affecting the processing performance of the material. Too low moisture content in the material may reduce fluidity in the molten state, affecting the injection molding or extrusion process.

[0039] In this embodiment, as a preferred solution, the drive assembly 400 includes a drive motor 420 and a transmission. The drive motor 420 is arranged on the side of the unloading assembly 300. The output end of the drive motor 420 is connected to the end face of the transmission half gear 510 through the transmission, which is used to drive the transmission half gear 510 to rotate. The output shaft of the drive motor 420 is connected to the transmission half gear 510 through the transmission. The drive motor 420 provides rotational power. The transmission is used to adjust the speed and torque output by the drive motor 420. The drive motor 420 and the transmission are both existing well-known technologies, which can avoid the transmission half gear 510 from rotating too fast, optimize the output of the drive motor 420, improve the overall efficiency of the system, and reduce energy loss. The transmission adjusts the output of the drive motor 420 to achieve precise control of the transmission half gear 510, ensure that the time and frequency of each vibration are adjustable, reduce the wear of the drive motor 420 and the transmission system, extend the service life of the equipment, and reduce maintenance costs. The transmission can adjust the output according to the actual load to adapt to different material processing requirements.

[0040] In this embodiment, as a preferred solution, the material discharge assembly 300 includes a material discharge box 310 and a material discharge hopper 320. The cross section of the material discharge hopper 320 is arranged in an inverted trapezoidal shape. One end of the material discharge box 310 is communicated with the end of the material discharge hopper 320 with a larger opening, and the end of the material discharge hopper 320 with a smaller opening is connected to the input end of the injection molding assembly 200. The feed port is opened on the side of the material discharge box 310, and one end of the liquid collecting box 110 is fixedly connected to the side of the material discharge box 310 and is located outside the feed port.

[0041] One end of the material box 310 is connected to the end of the lower hopper 320 with a larger opening. The material box 310 receives the recycled polypropylene material transferred from the conveying component 100 through the side feed port. The fixed connection design of the liquid collecting box 110 ensures a smooth transition from the conveying component 100 to the material box 310 to avoid leakage of liquid and impurity materials. The material box 310 provides a buffer space to ensure a smooth transition of the material before entering the lower hopper 320. The inverted trapezoidal design of the lower hopper 320 allows the material to flow naturally to the end with a smaller opening under the action of gravity, ensuring the continuity and stability of the flow. The inverted trapezoidal design ensures that the material flows naturally under the action of gravity, reduces manual intervention, and improves the degree of automation.

[0042] The cam 340 is used to move the conveyor 130 to the support 120, thereby preventing the conveyor 130 from vibrating and causing the conveyor 130 to collide with the support 120.

[0043] In this embodiment, as a preferred solution, the inner wall of the lower hopper 320 is rotatably connected with a dispersion plate 330, and the end face of the transmission half gear 510 is connected to the dispersion plate 330 through a timing belt 540, which is used to drive the dispersion plate 330 to rotate. The dispersion plate 330 rotates in the lower hopper 320, and can evenly disperse the recycled polypropylene material entering the lower hopper 320 to avoid the accumulation or bridging of the material in the lower hopper 320, especially for long-term non-start-up use, the recycled polypropylene material accumulates in the lower hopper 320, and the recycled polypropylene material is prevented from agglomerating in the lower hopper 320, thereby affecting the smooth entry into the injection molding component 200, preventing the material from adhering to or accumulating on the inner wall of the lower hopper 320, reducing the risk of blockage, and transmitting the rotational motion of the transmission half gear 510 to the dispersion plate 330 through the timing belt 540, so as to realize the synchronous rotation of the dispersion plate 330. The use of the timing belt 540 ensures the stable rotation of the dispersion plate 330, improves the effect of material dispersion and flow, reduces the use of power sources, and further reduces costs.

[0044] In this embodiment, as a preferred solution, the surface of the conveying plate 130 is detachably connected to the filter plate 150 by bolts, and the surface of the filter plate 150 is provided with a filter net. Through the action of the filter plate 150, the recycled polypropylene material is filtered in coordination with the vibration of the conveying plate 130 to discharge the liquid and impurities. At the same time, the filter plate 150 can be replaced through the detachable connection, which is convenient for later maintenance.

[0045] The injection molding assembly 200 is a prior art known in the art and is only cited here. It includes an injection unit, a mold unit, a clamping unit and an ejector unit. The injection unit efficiently melts the recycled polypropylene and accurately injects it into the mold through the cooperation of a screw and a heater. The mold unit includes a fixed mold, a movable mold, a mold cavity, a runner system, and a cooling system. During the injection process, the movable mold and the fixed mold are clamped to form a closed mold cavity. The molten material is injected into the mold cavity through the runner system. The cooling system is started to quickly cool down the inside of the mold and the material is solidified and formed. The mold unit ensures the accuracy of the size and shape of the molded product through the precisely designed mold cavity and runner system, and quickly solidifies the material through the cooling system. The clamping unit provides a strong clamping force to ensure that the mold is tightly closed during the injection process to prevent material leakage. The ejector unit ejects the molded product smoothly. The ejector unit includes an ejector pin, an ejector plate, and an ejector device (such as a hydraulic cylinder or a cylinder). After cooling and solidification, the movable mold is separated from the fixed mold, and the ejector device is started to push the ejector pin to the ejector plate to eject the product from the mold cavity.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recycled polypropylene injection molding device, characterized in that: It comprises a conveying component (100) and an injection molding component (200) having a blanking component (300) arranged at an input end; A feeding port is provided on the side of the material discharge assembly (300); The conveying assembly (100) comprises a liquid collecting box (110) having a liquid collecting chamber (120), one end of the liquid collecting box (110) being fixedly connected to a side surface of a material discharging assembly (300), an inner wall of the liquid collecting chamber (120) being rotatably connected to a conveying plate (130) for filtering and regenerating polypropylene material via a rotating shaft, one end of the conveying plate (130) passing through a feed port and being located in the material discharging assembly (300), and a drying mechanism (140) being further provided on the liquid collecting box (110); It also includes a driving component (400) having an intermittent transmission component (500) connected to its output end, wherein the driving component (400) is connected to one end of the conveying plate (130) located in the unloading component (300) via the intermittent transmission component (500) and is used to drive the conveying plate (130) to vibrate intermittently; The intermittent transmission assembly (500) comprises a transmission half gear (510), a transmission gear (520) and a rocker mechanism (530), wherein the transmission half gear (510) is fixedly connected to the output end of the driving assembly (400), the transmission half gear (510) is meshingly connected with the transmission gear (520), and the rocker mechanism (530) is used to convert the continuous rotational motion of the transmission gear (520) into linear motion so as to cause the conveying plate (130) to swing back and forth, thereby generating vibration; The driving assembly (400) comprises a reed switch (410), a surface of the transmission half gear (510) not provided with a tooth groove is provided with a magnet (430), and the reed switch (410) is used to cooperate with the magnet (430) to control the intermittent operation of the drying mechanism (140).

2. A recycled polypropylene injection molding device according to claim 1, characterized in that: The end surface of the transmission gear (520) is rotatably connected to the power input end of the rocker mechanism (530), and the power output end of the rocker mechanism (530) is rotatably connected to one end of the conveying plate (130) located in the unloading assembly (300).

3. A recycled polypropylene injection molding device according to claim 2, characterized in that: The rocker mechanism (530) comprises a transmission rod (531) and a swing rod (532); one end of the transmission rod (531) is eccentrically rotationally connected to the end surface of the transmission gear (520); the other end of the transmission rod (531) is rotationally connected to one end of the swing rod (532); the middle part of the swing rod (532) is rotationally connected to the inner side wall of the blanking assembly (300); and the other end of the swing rod (532) is rotationally connected to one end of the conveying plate (130) located in the blanking assembly (300) via a provided slide groove (533).

4. A recycled polypropylene injection molding device according to claim 2, characterized in that: The drying mechanism (140) comprises a drying shell (141) and a drying fan (142); the drying shell (141) is a shell-shaped structure with one end open; the drying shell (141) is detachably connected to the upper surface of the liquid collecting box (110) by means of bolts; and the drying fan (142) is arranged at the bottom of the groove of the drying shell (141) and faces the conveying plate (130).

5. A recycled polypropylene injection molding device according to claim 4, characterized in that: The reed switch (410) is connected in series in the circuit of the drying fan (142).

6. A recycled polypropylene injection molding device according to claim 2, characterized in that: The driving assembly (400) comprises a driving motor (420) and a transmission. The driving motor (420) is arranged on the side of the blanking assembly (300). The output end of the driving motor (420) is connected to the end face of the transmission half gear (510) through the transmission, and is used to drive the transmission half gear (510) to rotate.

7. A recycled polypropylene injection molding device according to claim 2, characterized in that: The material discharge assembly (300) comprises a material discharge box (310) and a material discharge hopper (320); the cross section of the material discharge hopper (320) is arranged in an inverted trapezoidal shape; one end of the material discharge box (310) is communicated with an end of the material discharge hopper (320) with a larger opening; an end of the material discharge hopper (320) with a smaller opening is connected to an input end of the injection molding assembly (200); the feed port is provided on a side of the material discharge box (310); and one end of the liquid collecting box (110) is fixedly connected to the side of the material discharge box (310) and is located outside the feed port.

8. A recycled polypropylene injection molding device according to claim 7, characterized in that: The inner top wall and the inner bottom wall of the material discharge box (310) located at the material feed port are both provided with a spring (340), and one end of the spring (340) is in contact with the conveying plate (130).

9. A recycled polypropylene injection molding device according to claim 7, characterized in that: The inner wall of the lower hopper (320) is rotatably connected to a dispersion plate (330), and the end surface of the transmission half gear (510) is connected to the dispersion plate (330) via a timing belt (540) for driving the dispersion plate (330) to rotate.

10. A recycled polypropylene injection molding device according to claim 1, characterized in that: The surface of the conveying plate (130) is detachably connected to a filter plate (150) via bolts, and a filter screen is provided on the surface of the filter plate (150).

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