A hot melting device for recycling waste plastic parts

Abstract

The application discloses a hot melting equipment for recycling waste plastic parts and relates to the field of waste plastic parts, which comprises a stock bin, a feeding port is installed at the top end of the stock bin, a crushing structure is installed in the feeding port, a driving mechanism is connected to the side of the stock bin, a driving shaft is connected to the output end of the driving mechanism, the driving shaft extends to the inside of the stock bin and extends to the other side of the stock bin, a first feeding screw is installed in the stock bin, and a hot melting mechanism is installed on the side of the stock bin away from the driving mechanism. The feeding port and the buffer plate are arranged, when the waste plastic enters, the waste plastic is crushed into plastic particles by the crushing roller, the plastic particles slide down the slide plate and hit the buffer plate, thereby reducing the damage to other equipment in the stock bin when falling, and the buffer plate is hit, thereby pushing the buffer plate to shake, driving the spring rod and the impact hammer to shake, and hitting the filter screen.

Description

Technical Field

[0001] This invention relates to the field of waste plastic parts, specifically a hot melt equipment for recycling waste plastic parts. Background Technology

[0002] Plastic buckets are a common type of container. Waste generated during plastic bucket manufacturing (primarily through extrusion blow molding) is concentrated in the molding, post-processing, and quality inspection stages. This waste is diverse and has high recycling value. The extrusion stage generates waste such as material changeover material, color transition material, and preform head and tail waste. The molding stage primarily produces die-cutting flash, accounting for 60%-70% of the waste, along with preforms that failed to expand properly. Post-processing generates trimming, punching, and other small scraps. Defective buckets with bubbles, leaks, or deformation that fail quality inspection are also considered waste. Therefore, manufacturers need to recycle and process this waste during production.

[0003] Existing waste recycling equipment, such as the energy-saving melting equipment for recycling waste plastics disclosed in CN202310207977.X, pre-treats raw materials through an internal crushing structure and then heats and recycles them. Alternatively, the waste recycling equipment for plastic woven bags disclosed in the prior art CN221417119U can control the woven bag structure to enter the hot-melting equipment through airflow for hot-melting treatment.

[0004] However, the waste generated during the production of existing plastic buckets is usually oddly shaped and contains impurities. During the recycling process, in order to avoid damaging the hot-melt equipment, the waste is usually cleaned. After cleaning, because there are gaps between the plastic pieces, water vapor will interfere with subsequent processing during the hot-melt process. Usually, drying is required after crushing. Existing drying methods usually use airflow for heating, which is not very effective at removing moisture accumulated between the fragments. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a hot melt equipment for recycling waste plastic parts, so as to solve the technical problems of easy accumulation of a large amount of water during the washing of fragments and the inconvenience of drying the fragments.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hot-melt device for recycling waste plastic parts, comprising a hopper, an inlet installed at the top of the hopper, a crushing structure installed inside the inlet, a drive mechanism connected to the side of the hopper, a drive shaft connected to the output end of the drive mechanism, the drive shaft extending into the hopper and to the other side of the hopper, a first feeding screw installed inside the drive shaft, and a hot-melt mechanism installed on the side of the hopper away from the drive mechanism, the hot-melt mechanism having a feeding mechanism installed inside. The heating cylinder has a drive shaft extending into its interior. A second feeding screw is connected to the outer side of the drive shaft. Four sets of reflux mechanisms are installed on the side of the hot-melting mechanism. An upper reflux pipe and a lower reflux pipe are respectively installed at the ends of the reflux mechanisms. Both the upper and lower reflux pipes are located inside the hopper. A transmission gear is connected to the outer side of the drive shaft. The end of the upper reflux pipe extends to the outer wall of the drive shaft and is connected to a driven gear. The driven gear meshes with the drive shaft to drive the upper reflux pipe to rotate. A mixing blade and a venting pipe are installed on the outer side of the upper reflux pipe.

[0007] By adopting the above technical solution, waste plastics can be easily crushed. After crushing, the waste particles are fed into the hopper, dried, and then injected into the hot melt mechanism for melting and recycling via the feeding screw.

[0008] The invention is further configured such that a crushing motor is installed on the side of the feed inlet, and the output end of the crushing motor extends into the inside of the feed inlet and is connected to a crushing roller. There are two sets of crushing rollers, and one set of crushing rollers is connected to the crushing motor through a transmission structure, which is a transmission belt and transmission wheel structure.

[0009] Preferably, the fed waste plastic can be easily crushed, facilitating subsequent recycling.

[0010] The invention is further configured such that a sliding plate is installed inside the hopper, the sliding plate is tilted in the direction of the hopper, and a buffer plate is provided on the inner wall of the hopper, the buffer plate is aligned with the bottom end of the sliding plate, and a support rod is connected to the bottom end of the sliding plate.

[0011] Preferably, the skateboard can be easily installed and positioned to improve stability.

[0012] The invention is further configured such that the buffer plate is composed of a fixed plate and a guide plate, a filter screen is connected to the bottom of the fixed plate, a spring rod and a punch are installed on the back plate of the guide plate, the guide plate is movably connected to the fixed plate through the spring rod, and the punch is aligned with the filter screen.

[0013] Preferably, the guide plate is designed to slide smoothly, thereby driving the hammer to impact the filter screen and reducing water droplet accumulation on the filter screen.

[0014] The present invention is further configured such that the reflux mechanism includes a reflux fan blade and a reflux motor, the reflux fan blade is located inside the reflux mechanism, the reflux motor is located above the reflux mechanism, a transmission chamber is connected below the reflux motor, the reflux motor is connected to the reflux fan blade inside the transmission chamber, and a controller is installed on the side of the reflux motor.

[0015] Preferably, it facilitates the rotation of the return fan blades, and by using an external return motor, heat damage to the return motor is reduced.

[0016] The present invention is further configured such that the output end of the reflux motor is connected to a transmission gear, and the end of the reflux fan blade is equipped with a linkage gear, wherein the transmission gear and the linkage gear mesh and drive each other.

[0017] Preferably, it facilitates the rotation of the return fan blades.

[0018] The present invention is further configured such that a limiting plate is sleeved on the outer side of the upper return pipe, the limiting plate is fixedly connected to the hopper, the upper return pipe rotates inside the limiting plate, the lower return pipe is fixed to the inner wall of the hopper, and the outer wall of the lower return pipe is aligned with the inner wall of the hopper.

[0019] Preferably, it can easily heat the inside of the hopper, improve the heating effect, heat the water vapor in the plastic particles, and reduce water vapor residue.

[0020] The present invention is further configured such that an outlet is installed at the end of the heating cylinder, an electric heating module is installed on the outer wall of the heating cylinder, and an electric heating module is installed between each group of electric heating modules and fixed to the inner wall of the hot melting mechanism, and an air inlet is installed on the outer wall of the hot melting mechanism.

[0021] Preferably, the heated raw materials can be easily discharged and recycled.

[0022] In summary, the present invention has the following main beneficial effects: 1. This invention, through the setting of the feed inlet and buffer plate, can crush waste plastic into plastic particles by the crushing roller when the waste plastic enters. The plastic particles will slide down the slide plate and hit the buffer plate, thereby reducing the damage to other equipment inside the hopper when falling. The impact on the buffer plate will push the buffer plate to shake, which will drive the spring rod and the impact hammer to shake, thereby impacting the filter screen and reducing the water droplets attached to the filter screen.

[0023] 2. The present invention, through the reflux mechanism, can draw hot air from the hot melting mechanism into the upper and lower reflux pipes during the raw material collection process. The hot air will heat, dry and preheat the accumulated material. During the heating process, water vapor will be generated. The hot air jet from the vent pipe will drive the water vapor to move upward synchronously and finally be discharged through the filter screen, thereby improving the heating effect.

[0024] 3. By setting multiple sets of mixing blades of different specifications, the present invention can buffer the falling plastic particles during use, so that they fall into the hopper. The shorter mixing blades are aligned with the falling plastic particles, thereby effectively reducing the damage caused by the particles hitting the blades. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the heating cylinder structure of the present invention; Figure 4 This is a schematic diagram of the buffer plate structure of the present invention; Figure 5 This is a schematic diagram of the installation structure of the heating cylinder of the present invention; Figure 6 This is a schematic diagram of the upper reflux pipe of the present invention; Figure 7 This is a schematic diagram of the structure of each group of mixed blades in this invention; Figure 8 This is a schematic diagram of the installation structure of each group of screws in this invention; Figure 9 This is a schematic diagram of the internal structure of the reflux mechanism of the present invention.

[0026] Explanation of reference numerals in the attached figures: 1. Hopper; 101. Slide plate; 2. Feed inlet; 201. Crushing motor; 202. Crushing roller; 3. Drive mechanism; 301. Drive shaft; 302. Transmission gear; 303. First feeding screw; 304. Second feeding screw; 4. Hot melt mechanism; 401. Air inlet; 5. Recirculation mechanism; 501. Recirculation fan blade; 5011. Linkage gear; 502. Recirculation motor; 5021. Transmission gear; 503. 504. Transmission chamber; 6. Controller; 7. Heating cylinder; 8. Discharge port; 9. Heating module; 10. Support frame; 11. Connecting cylinder; 2. Upper return pipe; 3. Driven gear; 4. Mixing blade; 5. Vent pipe; 6. Lower return pipe; 7. Buffer plate; 8. Fixing plate; 9. Spring rod; 10. Impact hammer; 11. Filter screen; 12. Guide plate; 13. Limiting plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The embodiments of the present invention will now be described.

[0029] For examples, please refer to Figures 1 to 9 A hot-melting device for recycling waste plastic parts includes a hopper 1. A feed inlet 2 is installed at the top of the hopper 1. A crushing motor 201 is installed on the side of the feed inlet 2. The output end of the crushing motor 201 extends into the feed inlet 2 and is connected to crushing rollers 202. There are two sets of crushing rollers 202. One set of crushing rollers 202 is connected to the crushing motor 201 via a transmission structure, which is a transmission belt and transmission wheel structure. This allows for the crushing of the added waste plastic, improving the crushing effect and facilitating subsequent hot-melting. A drive mechanism 3 is connected to the side of the hopper 1. The output end of the drive mechanism 3 is connected to a drive shaft 301, which extends into the hopper 1. In another instance, the drive shaft 301 is located inside the hopper 1 and a first feeding screw 303 is installed. A hot melt mechanism 4 is installed on the side of the hopper 1 away from the drive mechanism 3. A heating cylinder 6 is installed inside the hot melt mechanism 4. A discharge port 601 is installed at the end of the heating cylinder 6. An electric heating module 602 is installed on the outer wall of the heating cylinder 6. Each group of electric heating modules 602 is fixed to the inner wall of the hot melt mechanism 4. An air inlet 401 is installed on the outer wall of the hot melt mechanism 4. The drive shaft 301 extends into the interior of the heating cylinder 6. A second feeding screw 304 is connected to the outer side of the drive shaft 301, which can conveniently heat and melt the crushed plastic particles to form molten blocks.

[0030] Please see Figures 2 to 9Four sets of return mechanisms 5 are installed on the side of the hot melt mechanism 4. Each return mechanism 5 includes a return fan blade 501 and a return motor 502. The return fan blade 501 is located inside the return mechanism 5, and the return motor 502 is located above the return mechanism 5. A transmission chamber 503 is connected below the return motor 502. The return motor 502 is connected to the return fan blade 501 inside the transmission chamber 503. A controller 504 is installed on the side of the return motor 502. A transmission gear 5021 is connected to the output end of the return motor 502. A linkage gear 5011 is installed at the end of the return fan blade 501. The transmission gear 5021 and the linkage gear 5011 are connected to each other. 011 meshing transmission, the end of the return mechanism 5 is respectively equipped with an upper return pipe 7 and a lower return pipe 8. Both the upper return pipe 7 and the lower return pipe 8 are located inside the hopper 1. The outer side of the drive shaft 301 is connected to a transmission gear 302. The end of the upper return pipe 7 extends to the outer wall of the drive shaft 301 and is connected to a driven gear 701. The driven gear 701 meshes with the drive shaft 301 to drive the upper return pipe 7 to rotate. The outer side of the upper return pipe 7 is equipped with a mixing blade 702 and a vent pipe 703, which can conveniently draw the heat in the heating cylinder 6 into the hopper 1, thereby heating the crushed plastic particles and drying the plastic particles.

[0031] For details regarding the above embodiments, please refer to [link / reference]. Figure 3 and Figure 4 The hopper 1 is equipped with a sliding plate 101, which is tilted towards the inside. The inner wall of the hopper 1 is provided with a buffer plate 9, which is aligned with the bottom of the sliding plate 101. A support rod is connected to the bottom of the sliding plate 101. The buffer plate 9 is composed of a fixed plate 901 and a guide plate 905. A filter screen 904 is connected to the bottom of the fixed plate 901. A spring rod 902 and a hammer 903 are installed on the back plate of the guide plate 905. The guide plate 905 is movably connected to the fixed plate 901 through the spring rod 902. The hammer 903 is aligned with the filter screen 904, which can easily buffer the plastic granules during the feeding process, thereby reducing the impact of feeding on the internal equipment of the hopper 1. It can also facilitate the discharge of water vapor. During the discharge process, the impact of the plastic granules can also be converted into an impact on the filter screen 904, reducing water blockage in the filter screen 904.

[0032] For details regarding the above embodiments, please refer to [link / reference]. Figure 6 A limiting plate 10 is sleeved on the outside of the upper return pipe 7. The limiting plate 10 is fixedly connected to the hopper 1. The upper return pipe 7 rotates inside the limiting plate 10. The lower return pipe 8 is fixed to the inner wall of the hopper 1, and the outer wall of the lower return pipe 8 is aligned with the inner wall of the hopper 1 to facilitate the rotation of the upper return pipe 7.

[0033] During the recycling process, the waste plastic is first placed into the feed inlet 2, and the crushing motor 201 is started. The crushing motor 201 drives the crushing roller 202 to rotate, which pre-crushes the incoming waste plastic into granular structures (of varying sizes). These granules then enter the hopper 1. The crushed plastic granules slide along the slide plate 101 and eventually hit the buffer plate 9. The buffer plate 9 is cushioned by the spring rod 902 between itself and the fixed plate 901, and simultaneously drives the hammer 903 to impact the filter screen 904. Subsequently, the plastic granules slide along the guide plate 905. The plastic particles are placed at the bottom of the hopper 1. The drive mechanism 3 drives the drive shaft 301 to rotate, and the drive shaft 301 drives the first feeding screw 303 to rotate, thereby pushing the plastic particles accumulated inside the hopper 1 into the connecting cylinder 604. The drive shaft 301 is located inside the heating cylinder 6 as the second feeding screw 304, which further drives the plastic particles into the heating cylinder 6. The electric heating module 602 heats the plastic particles, and the heated plastic particles melt to form plastic hot melt blocks, which are finally discharged through the discharge port 601, thereby realizing the recycling of waste plastic and improving the utilization efficiency. Before the recycling process, the equipment usually needs to be preheated. Before adding waste plastic, multiple sets of electric heating modules 602 are activated in advance to preheat the heating cylinder 6. During use, the reflux mechanism 5 is activated simultaneously. The reflux motor 502 in the reflux mechanism 5 drives the reflux fan blades 501 to rotate. The reflux fan blades 501 drive the air flow in the heat-melting mechanism 4. Outside air enters the heat-melting mechanism 4 through the air inlet 401. The heat heats the air, and the heated airflow is sent by the reflux mechanism 5 into the upper reflux pipe 7 and the lower reflux pipe 8. Multiple sets of vent pipes 703 are provided on the outside of the flow pipe 7, which can inject the internal hot airflow into the hopper 1. After the plastic particles enter the hopper 1, the hopper 1 is preheated by the hot airflow, and the blown airflow will transport the water vapor upward and discharge the water vapor through the filter screen 904. The water vapor adheres to the filter screen 904, and the hammer 903 repeatedly impacts it to clean the adhered water, prevent the filter screen 904 from clogging, improve the exhaust effect, and each set of return pipes will heat the plastic particles to prevent the water from damaging the heating cylinder and prevent unnecessary damage to the molten block.

[0034] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A hot melt recycling device for waste plastic parts, comprising a hopper (1), characterized in that: A feed inlet (2) is installed at the top of the silo (1). A crushing structure is installed inside the feed inlet (2). A drive mechanism (3) is connected to the side of the silo (1). A drive shaft (301) is connected to the output end of the drive mechanism (3). The drive shaft (301) extends into the silo (1) to the other side. A first feeding screw (303) is installed inside the drive shaft (301) in the silo (1). A heat-melting mechanism (4) is installed on the side of the silo (1) away from the drive mechanism (3). A heating cylinder (6) is installed inside the heat-melting mechanism (4). The drive shaft (301) extends into the heating cylinder (6). A second feeding screw (304) is connected to the outside. Four sets of return mechanisms (5) are installed on the side of the hot melt mechanism (4). The ends of the return mechanisms (5) are respectively equipped with an upper return pipe (7) and a lower return pipe (8). The upper return pipe (7) and the lower return pipe (8) are both located inside the hopper (1). The drive shaft (301) is connected to a transmission gear (302) on the outside. The end of the upper return pipe (7) extends to the outer wall of the drive shaft (301) and is connected to a driven gear (701). The driven gear (701) meshes with the drive shaft (301) to drive the upper return pipe (7) to rotate. The upper return pipe (7) is equipped with a mixing blade (702) and a vent pipe (703) on the outside. The hopper (1) is equipped with a sliding plate (101) inside. The sliding plate (101) is tilted towards the inside. A buffer plate (9) is provided on the inner wall of the hopper (1). The buffer plate (9) is aligned with the bottom end of the sliding plate (101). A support rod is connected to the bottom end of the sliding plate (101). The buffer plate (9) is composed of a fixed plate (901) and a guide plate (905). A filter screen (904) is connected to the bottom of the fixed plate (901). A spring rod (902) and a hammer (903) are installed on the back plate of the guide plate (905). The guide plate (905) is movably connected to the fixed plate (901) through the spring rod (902). The hammer (903) is aligned with the filter screen (904).

2. The hot melt equipment for recycling waste plastic parts according to claim 1, characterized in that: A crushing motor (201) is installed on the side of the feed inlet (2). The output end of the crushing motor (201) extends into the feed inlet (2) and is connected to a crushing roller (202). There are two sets of crushing rollers (202). One set of crushing rollers (202) is connected to the crushing motor (201) through a transmission structure. The transmission structure is a transmission belt and a transmission wheel structure.

3. The hot melt equipment for recycling waste plastic parts according to claim 1, characterized in that: The reflux mechanism (5) includes a reflux fan blade (501) and a reflux motor (502). The reflux fan blade (501) is located inside the reflux mechanism (5), and the reflux motor (502) is located above the reflux mechanism (5). A transmission chamber (503) is connected below the reflux motor (502). The reflux motor (502) is connected to the reflux fan blade (501) inside the transmission chamber (503). A controller (504) is installed on the side of the reflux motor (502).

4. The hot melt equipment for recycling waste plastic parts according to claim 3, characterized in that: The output end of the reflux motor (502) is connected to a transmission gear (5021), and the end of the reflux fan blade (501) is equipped with a linkage gear (5011). The transmission gear (5021) and the linkage gear (5011) mesh and drive each other.

5. The hot melt equipment for recycling waste plastic parts according to claim 1, characterized in that: The upper return pipe (7) is fitted with a limiting plate (10) on its outer side. The limiting plate (10) is fixedly connected to the hopper (1). The upper return pipe (7) rotates inside the limiting plate (10). The lower return pipe (8) is fixed to the inner wall of the hopper (1), and the outer wall of the lower return pipe (8) is aligned with the inner wall of the hopper (1).

6. The hot melt equipment for recycling waste plastic parts according to claim 1, characterized in that: The heating cylinder (6) is equipped with a discharge port (601) at its end. The heating cylinder (6) is equipped with an electric heating module (602) on its outer wall. Each group of electric heating modules (602) is equipped with an electric heating module (602) and fixed to the inner wall of the hot melt mechanism (4). The hot melt mechanism (4) is equipped with an air inlet (401) on its outer wall.

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