A recycling and granulation equipment specially used for lightweight recycled plastics

Abstract

The present invention discloses a recycling granulation device dedicated to lightweight recycled plastics, comprising a belt conveyor, a forced feeder and a single screw extruder, wherein one side of the belt conveyor is provided with a forced feeder, one side of the forced feeder is provided with a single screw extruder, the surface of the belt conveyor is connected with a conveyor belt through a driving motor, a metal detector is provided on the top of the belt conveyor, a baffle is provided on the other side of the top of the belt conveyor, and a placement tank is installed on one side of the belt conveyor. The present invention improves the output by providing forced feeding and a melt filter, improves the product quality by providing vacuuming and a melt filter, and reduces the frequency of changing the screen by a large filter area and a long working time, and the filter screen replacement speed is fast, thereby reducing the labor intensity of workers.

Description

Technical Field

[0001] The invention relates to the technical field of recycled plastics, in particular to a recycling and granulation device dedicated to lightweight recycled plastics. Background Art

[0002] Lightweight recycled plastic substrates, such as PET blister boxes, PP takeout boxes, films, etc., have low bulk density and slow feeding speed, resulting in low output. Plastic recycling granulator is a molding machine that can make waste plastics into specific shapes. It is widely used in various materials with a melting point of less than 300°C that require condensation granulation, such as: sulfur, paraffin, rosin, asphalt, partial anhydride, stearic acid, maleic anhydride, phenolic resin, petroleum resin, modified resin and other resin products; hot melt adhesive, synthetic soap, urea, additives, rubber and plastic additives and other recycled products.

[0003] A recycling granulation equipment in the prior art has the following disadvantages:

[0004] 1. Prior art CN211363412U discloses a granulation device dedicated to recycling plastic PET, including "a base, a transmission box is provided at one end of the base, a motor is provided on the side of the transmission box, a coupling is provided between the motor and the transmission box, a barrel is provided above the motor, one end of the barrel is connected to the side of the transmission box, a head is provided at the other end of the barrel, a feed port and an exhaust pipe are provided at both ends of the side wall of the barrel, a first single screw is provided in the barrel, one end of the first single screw is connected to the side of the transmission box, the other end of the first single screw is provided at the end of the head, a second single screw is provided below the first single screw, and the second single screw is provided below the exhaust pipe. The granulation device dedicated to recycling plastic PET proposed by the present invention can solve the discharge of material impurities during the granulation process, and will not overheat and degrade the plastic PET, thereby ensuring the quality of granulation." When the above device is used, its production capacity is low, and it is difficult for the internal device to effectively reduce energy consumption, so that the use efficiency of the device is low;

[0005] 2. In the prior art, a recycling and granulation device dedicated to lightweight recycled plastics is used. When using it, the staff requires high output, high quality and low cost effects. However, most devices have poor effects in recycling and granulation, resulting in inconvenience in use. Summary of the invention

[0006] The object of the present invention is to provide a recycling and granulation device dedicated to lightweight recycled plastics to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a recycling granulation equipment dedicated to lightweight recycled plastics, comprising a belt conveyor, a forced feeder and a single-screw extruder, wherein a forced feeder is arranged on one side of the belt conveyor, a single-screw extruder is arranged on one side of the forced feeder, a conveyor belt is connected to the surface of the belt conveyor through a driving motor, a metal detector is arranged on the top of the belt conveyor, a baffle is arranged on one side of the top of the belt conveyor, a placing tank is installed on one side of the belt conveyor, a fixed bottom plate is installed on one side of the bottom of the forced feeder, and a distribution box is installed on one side of the top of the fixed bottom plate.

[0008] Preferably, a twin-screw extruder is arranged on one side of the top of the single-screw extruder, a melt pump is connected to the extrusion end of the twin-screw extruder, and one side of the twin-screw extruder is arranged on one side of the single-screw extruder.

[0009] Preferably, a weighing scale is provided on one side of the forced feeder.

[0010] Preferably, a water-cooled drawing system is provided on one side of the single-screw extruder, a filter is connected to the other side of the single-screw extruder, a placement box is overlapped on one side of the inner wall of the filter, and a feed pipe is installed on one side of the top of the filter.

[0011] Preferably, one side of the surface of the water-cooled drawing system is connected to an exhaust pipe, and one end of the exhaust pipe is connected to a Roots vacuum pump.

[0012] Preferably, a fixing seat is installed on one side of the bottom of the Roots vacuum pump, and the output end of the Roots vacuum pump is connected to a screen changer through an air outlet pipe.

[0013] Preferably, a fixing bracket is installed on one side of the top of the fixing seat, a fixing ring is connected to one side of the surface of the fixing bracket, and one side of the inner wall of the fixing ring is connected to the surface of the screen changer.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention increases production, improves quality and reduces labor intensity by arranging a belt conveyor, a conveyor belt, a metal detector, a baffle and a placement tank.

[0016] 2. The present invention provides a single-screw extruder, a screen changer, a single-screw extruder, a weighing scale, a Roots vacuum pump, a water-cooled drawing system and a filter, so that the device has the effects of high quality, high efficiency and low cost.

[0017] 3. The present invention solves the problems of low bulk density, slow feeding speed and high pollution degree of lightweight plastics through the synergistic effect of forced feeder and Roots vacuum pump and other equipment. The filter used in the present invention has a double-station screen changer to improve the screen change efficiency, improve the efficiency and quality of melt filtration, improve product value, and increase the economic benefits of resource disposal of lightweight plastic waste.

[0018] 4. The filters used in the present invention include a double-column large-area cartridge melt filter and a candle wick melt filter. The double-column filter plays a role of coarse filtration (filter mesh number 200-300 mesh), and the candle wick filter plays a role of fine filtration (filter mesh number 400-700 mesh). The melt pump can improve the efficiency of filtering melt conveying, thereby further improving the production capacity and the quality of recycled materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural stereogram of the present invention;

[0020] Figure 2 It is a schematic diagram of the transmission belt structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the filter structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the fixing ring structure of the present invention.

[0023] In the figure: 1. Belt conveyor; 2. Forced feeder; 3. Single screw extruder; 4. Conveyor belt; 5. Metal detector; 6. Baffle; 7. Placement tank; 8. Fixed bottom plate; 9. Distribution box; 10. Melt pump; 11. Twin screw extruder; 12. Weighing scale; 13. Water-cooled drawing system; 14. Filter; 15. Placement box; 16. Feed pipe; 17. Exhaust pipe; 18. Roots vacuum pump; 19. Fixed seat; 20. Screen changer; 21. Fixed bracket; 22. Fixed ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1:

[0028] See also Figure 1 and Figure 2 , an embodiment of the present invention provides a recycling granulation device dedicated to lightweight recycled plastics, comprising a belt conveyor 1, a forced feeder 2 and a single screw extruder 3, a forced feeder 2 is arranged on one side of the belt conveyor 1, the forced feeder 2 forces the recycled plastic substrate with light bulk density into the extruder, and realizes rough metering at the same time, the belt conveyor 1 is used to convey materials, a metal detector 5 is arranged on it, and a frequency conversion function is provided to ensure stable and uniform feeding, a single screw extruder 3 is arranged on the other side of the belt conveyor 1, a conveyor belt 4 is connected to one side of the surface of the belt conveyor 1 through a driving motor, a metal detector 5 is arranged on one side of the top of the belt conveyor 1, a baffle 6 is arranged on the other side of the top of the belt conveyor 1, a placing tank 7 is installed on one side of the belt conveyor 1, a fixed bottom plate 8 is installed on one side of the bottom of the forced feeder 2, and a distribution box 9 is installed on one side of the top of the fixed bottom plate 8;

[0029] When in use, the staff needs to set up the device with high efficiency and low energy consumption, because a belt conveyor 1 is arranged on one side of the device, and a conveyor belt 4 is connected to the inside of the belt conveyor 1 through a driving motor, and the conveyor belt 4 is used to transport materials, and a metal detector 5 is arranged above the belt conveyor 1 to facilitate the removal of the metal doped inside. A forced feeder 2 is arranged on one side, usually just above the feeding screw, mainly relying on a pressing screw, and both the forced feeder 2 and the conveyor belt have frequency conversion functions to ensure stable and uniform feeding. A melt pump 10 is arranged on the other side, and the melt pump 10 can increase the output. The die head pressure is changed to the melt pump 10 pressure, which reduces shear and thermal degradation, reduces the temperature and pressure of the die head, reduces the residence time, reduces the extrusion pressure, reduces equipment wear, and reduces energy consumption, thereby achieving the effect of allowing the staff to increase the production capacity of the device;

[0030] Embodiment 2:

[0031] See also Figure 1 and Figure 3 and Figure 4 An embodiment of the present invention provides a recycling granulation device dedicated to lightweight recycled plastics, including a twin-screw extruder 11, a water-cooled drawing system 13 and a single-screw extruder 3. The melt pump 10 greatly reduces the head pressure, which significantly improves the efficiency of the melt passing through the filter screen. The two melt filtrations can reduce yellowing and improve the purity of the melt. The twin-screw extruder 11 is arranged on one side of the top of the single-screw extruder 3. The extrusion end of the twin-screw extruder 11 is connected to the melt pump 10, and one side of the twin-screw extruder 11 is arranged on one side of the single-screw extruder 3. A weighing scale 12 is arranged on one side of the single-screw extruder 3. A water-cooled drawing system 13 is arranged on the side, and a filter 14 is connected to one side of the water-cooled drawing system 13. The filter 14 has two filtering stations and is always located in the extruder. When the station is switched, the yellowed material can be removed more thoroughly, thereby ensuring the cleanliness of the main flow channel. A placement box 15 is overlapped on one side of the inner wall of the filter 14, and a feed pipe 16 is installed on one side of the top of the filter 14. An exhaust pipe 17 is connected to one side of the surface of the water-cooled drawing system 13, and one end of the exhaust pipe 17 is connected to a Roots vacuum pump 18. A fixed seat 19 is installed on one side of the bottom of the Roots vacuum pump 18, and the output end of the Roots vacuum pump 18 is connected to a screen changer 20 through an exhaust pipe.

[0032] When in use, the staff needs to make the device achieve high yield, high quality and low cost. Because it is equipped with a twin screw and has a good vacuuming effect, the device can achieve high yield, high quality, low odor, and removal of low molecules helps to maintain the mechanical properties. In addition, while recycling and granulating, modification can also be achieved, so that recycling and modification can be completed by melting once, reducing costs. The single-screw extruder 3 first performs preliminary melting and filtration. The single screw diameter and aspect ratio are combined with the screw and determined according to the material type. The screen changer 20 adopts a column screen changer 20 with a fast screen changing speed. The weighing scale 12 usually adopts a weightless type. The Roots vacuum pump 18 vacuums to remove the migratable volatile odor. The water-cooled drawing system 13 has a cooling water tank, a vertical fan, a water pump, a support plate, a pelletizer, and a vibrating screen. The filter 14 has a hot air circulation function, so that the device has high quality, high efficiency and low cost.

[0033] A fixing bracket 21 is installed on one side of the top of the fixing seat 19 , a fixing ring 22 is connected to one side of the surface of the fixing bracket 21 , and one side of the inner wall of the fixing ring 22 is connected to the surface of the screen changer 20 .

[0034] In the present invention, the working steps of the device are as follows:

[0035] When in use, the staff needs to set up the device with high efficiency and low energy consumption, because a belt conveyor 1 is arranged on one side of the device, and the interior of the belt conveyor 1 is connected to a conveyor belt 4 through a driving motor, and the conveyor belt 4 is used to transport materials, and a metal detector 5 is arranged above the belt conveyor 1 to facilitate the removal of the metal doped inside, and a forced feeder 2 is arranged on one side, usually just above the feeding screw, mainly relying on a pressing screw, and there are frequency conversion functions on the forced feeder 2 and the conveyor belt to ensure stable and uniform feeding, and a melt pump 10 is arranged on the other side, and the melt pump 10 can increase the output, and the die head pressure is changed to the melt pump 10 pressure, which reduces shear and thermal degradation, reduces the temperature and pressure of the die head, reduces the residence time, reduces the extrusion pressure, reduces equipment wear, and reduces energy consumption, thereby achieving the effect of allowing the staff to increase the production capacity of the device. When in use, the staff The operator needs to make the device achieve high yield, high quality and low cost. Because it is equipped with a twin screw and has a good vacuuming effect, the device can achieve high yield, high quality, low odor, and removal of low molecules is helpful to the mechanical property retention rate. Moreover, while recycling and granulating, modification can also be achieved, so that recycling and modification can be completed by melting once, reducing costs. The single-screw extruder 3 first performs preliminary melting and filtration. The single screw diameter and aspect ratio are combined with the screw and determined according to the material type. The screen changer 20 adopts a column screen changer 20 with a fast screen changing speed. The weighing scale 12 usually adopts a loss-in-weight type. The Roots vacuum pump 18 vacuums to remove migratable volatile odors. The water-cooled drawing system 13 has a cooling water tank, a vertical fan, a water beater, a support plate, a pelletizer, and a vibrating screen. The filter 14 has a hot air circulation function, so that the device has high quality, high efficiency and low cost.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A recycling and granulation device for lightweight recycled plastics, comprising a belt conveyor (1), a forced feeder (2) and a single screw extruder (3), characterized in that: A forced feeder (2) is provided on one side of the belt conveyor (1), and a single-screw extruder (3) is provided on one side of the forced feeder (2); The surface of the belt conveyor (1) is connected to a conveyor belt (4) via a driving motor, a metal detector (5) is arranged on the top of the belt conveyor (1), a baffle (6) is arranged on one side of the top of the belt conveyor (1), and a placement tank (7) is installed on one side of the belt conveyor (1); A fixed bottom plate (8) is installed on one side of the bottom of the forced feeder (2), and a distribution box (9) is installed on one side of the top of the fixed bottom plate (8); A twin-screw extruder (11) is arranged on one side of the top of the single-screw extruder (3), the extrusion end of the twin-screw extruder (11) is connected to a melt pump (10), and one side of the twin-screw extruder (11) is arranged on one side of the single-screw extruder (3); A water-cooled drawing system (13) is provided on one side of the twin-screw extruder (11), a filter (14) is connected to the other side of the twin-screw extruder (11), a placement box (15) is overlapped on one side of the inner wall of the filter (14), and a feed pipe (16) is installed on one side of the top of the filter (14); One side of the surface of the water-cooled drawing system (13) is connected to an exhaust pipe (17), and one end of the exhaust pipe (17) is connected to a Roots vacuum pump (18); A fixing seat (19) is installed on one side of the bottom of the Roots vacuum pump (18), and an output end of the Roots vacuum pump (18) is connected to a screen changer (20) via an air outlet pipe.

2. The recycling and granulation equipment for lightweight recycled plastics according to claim 1 is characterized by: A weighing scale (12) is provided on one side of the forced feeder (2).

3. The recycling and granulation equipment for lightweight recycled plastics according to claim 1 is characterized by: A fixing bracket (21) is installed on one side of the top of the fixing seat (19), a fixing ring (22) is connected to one side of the surface of the fixing bracket (21), and one side of the inner wall of the fixing ring (22) is connected to the surface of the screen changer (20).

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