A plastic pellet mixing device

Abstract

This utility model relates to the field of plastic recycling technology, and more specifically, to a plastic pellet mixing device, comprising: a hollow hopper with a feed inlet; a stirring mechanism disposed in the hopper, corresponding to the feed inlet; a conveying mechanism horizontally disposed in the hopper, below the stirring mechanism, with its output end extending to the outside of the hopper; a distributing pipe connected to the output end of the conveying mechanism, vertically disposed outside the hopper, the distributing pipe having a first discharge port and a second discharge port, the first discharge port being higher than the output end of the conveying mechanism, and the second discharge port being lower than the output end of the conveying mechanism; a negative pressure mechanism connected to the first discharge port; and a crushing mechanism disposed between the second discharge port and the output end of the conveying mechanism. This plastic pellet mixing device aims to reduce the frequency of equipment downtime for maintenance during plastic recycling and improve the purity of recycled plastic.

Description

Technical Field

[0001] This utility model relates to the field of plastic recycling technology, and more specifically, to a plastic pellet mixing device. Background Technology

[0002] In the plastic recycling industry, the pretreatment stage has a decisive impact on the subsequent sorting efficiency and recycling purity. Existing agitation mechanisms mostly use a single rotating blade or a low-speed agitator shaft, which has limited effectiveness in tearing long, strip-shaped impurities such as tape and film entangled in plastic waste. These impurities easily become entangled in the spiral blades or accumulate at pipe bends during transport, leading to frequent shutdowns for cleaning.

[0003] Furthermore, traditional sorting equipment mostly adopts gravity settling or single air classification design, relying solely on density differences to separate light and heavy materials, and cannot simultaneously remove light dust and heavy foreign objects. Some equipment attempts to add multi-stage sorting modules, but the independent operation of each module leads to system complexity, increased energy consumption, and the heavy impurities after sorting still require additional crushing equipment, making the process lengthy.

[0004] Therefore, there is a need to design an easy-to-use plastic pellet mixing device. Utility Model Content

[0005] The main purpose of this invention is to propose a plastic pellet mixing device, which aims to reduce the frequency of equipment downtime for maintenance and improve the purity of recycled plastics during the plastic recycling process.

[0006] To solve the above-mentioned technical problems, a plastic pellet mixing device is proposed, comprising: a hollow material bin with a feed inlet;

[0007] A stirring mechanism is provided in the material hopper, corresponding to the feed inlet;

[0008] The conveying mechanism is horizontally arranged in the material box, located below the stirring mechanism, and its output end extends to the outside of the material box.

[0009] The material distribution pipe is connected to the output end of the conveying mechanism and is vertically installed outside the material box. The material distribution pipe has a first discharge port and a second discharge port. The first discharge port is higher than the output end of the conveying mechanism, and the second discharge port is lower than the output end of the conveying mechanism.

[0010] The negative pressure mechanism is connected to the first discharge port;

[0011] The crushing mechanism is located between the second discharge port and the output end of the conveying mechanism.

[0012] In any of the above technical solutions, further, the conveying mechanism and the distributing pipe are evenly arranged in two or more positions.

[0013] In any of the above technical solutions, the conveying mechanism further includes:

[0014] The first drive motor is fixedly mounted on the material box;

[0015] A rotating shaft is horizontally rotatable on the material box, with one end extending to the outside of the material box and the other end connected to the first drive motor;

[0016] The material box is provided with a discharge hole, the material discharge pipe is provided corresponding to the discharge hole, and the material distribution pipe is fixed on the material discharge pipe;

[0017] The helical blades are fixed on the rotating shaft.

[0018] In any of the above technical solutions, the conveying mechanism further includes:

[0019] Multiple support blocks are provided. The discharge pipe has a number of fixing holes equal to the number of support blocks. Each support block is fixed at a corresponding fixing hole. The support block extends to the side of the inner side of the discharge pipe and abuts against the spiral blade.

[0020] In any of the above technical solutions, the spiral blade further includes a first section and a second section, the second section being disposed on the side closer to the discharge pipe than the first section, and the pitch of the second section being greater than the pitch of the first section.

[0021] In any of the above technical solutions, the stirring mechanism further includes:

[0022] The second drive motor is fixedly mounted on the material box;

[0023] A stirring shaft is horizontally rotatably mounted on the material box and connected to the second drive motor;

[0024] Multiple cutting blades are staggered on the stirring shaft.

[0025] In any of the above technical solutions, further comprising:

[0026] Two guide plates are symmetrically and obliquely arranged inside the material box, and the stirring mechanism is located on the lower side between the two guide plates.

[0027] In any of the above technical solutions, further comprising:

[0028] The guide tube has a first end connected to the first discharge port of the distribution tube, and the second end is lower than the height of the first end. The negative pressure mechanism is connected to the guide tube.

[0029] The beneficial effects are:

[0030] 1. The mixing equipment of this utility model uses a distribution pipe and a negative pressure mechanism to collect light dust or plastic film by adsorption, while heavy and large particles or large segments of material are crushed twice by the crushing mechanism to remove impurities in a graded manner and improve the uniformity of the particle size of the recovered particles.

[0031] 2. The conveying mechanism and the distribution pipe can be set to two or more, which can operate independently and without interference, thereby increasing the throughput and reducing the risk of single point of failure.

[0032] 3. The discharge pipe and the distribution pipe are detachably connected, which facilitates cleaning or replacement of internal components. The second end of the negative pressure guide pipe is lower than the first end, which uses gravity to assist the flow of materials and reduce energy consumption.

[0033] 4. Multiple support blocks provide circumferential support to one end of the rotating shaft and the spiral blade, reducing the space occupied by the material conveying at that end and improving the convenience of material conveying within the conveying mechanism.

[0034] 5. The spiral blades of the conveying mechanism are divided into a first section with a small pitch and a second section with a large pitch, which increases the output flow rate at the end and prevents accumulation. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural schematic diagram of a plastic particle mixing device according to an embodiment of the present invention;

[0037] Figure 2 This is a cross-sectional structural schematic diagram of a plastic particle mixing device according to an embodiment of this utility model;

[0038] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0039] The annotations in the attached figures are explained as follows:

[0040] 1. Material bin;

[0041] 2. Stirring mechanism; 201. Second drive motor; 202. Stirring shaft; 203. Cutting blade;

[0042] 3. Conveying mechanism; 301. First drive motor; 302. Rotating shaft; 303. Discharge pipe; 304. Spiral blade; 305. Support block; 306. First section; 307. Second section;

[0043] 4. Material distribution pipe;

[0044] 5. Negative pressure mechanism;

[0045] 6. Crushing mechanism;

[0046] 7. Guide plate;

[0047] 8. Feed pipe. Detailed Implementation

[0048] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0049] It should be noted that, as shown in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements.

[0050] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0053] The following embodiments will provide a detailed description of a plastic pellet mixing device according to this application.

[0054] In this embodiment, as Figures 1 to 3 As shown, the plastic pellet mixing equipment includes: a hollow material bin 1 with a feed inlet;

[0055] The mixing mechanism 2 is located in the material box 1, corresponding to the feed inlet;

[0056] The conveying mechanism 3 is horizontally set in the material box 1, located below the mixing mechanism 2, and its output end extends to the outside of the material box 1.

[0057] The material distribution pipe 4 is connected to the output end of the conveying mechanism 3 and is vertically installed on the outside of the material box 1. The material distribution pipe 4 has a first discharge port and a second discharge port. The first discharge port is higher than the output end of the conveying mechanism 3 and the second discharge port is lower than the output end of the conveying mechanism 3.

[0058] Negative pressure mechanism 5 is connected to the first discharge port;

[0059] The crushing mechanism 6 is located between the second discharge port and the output end of the conveying mechanism 3.

[0060] In this technical solution, the material box 1 is fixed to the ground by a bracket. The material box 1 is a rectangular structure with an open top, and the upper part of the material box 1 is tapered inward into a pyramid shape. The side of the material box 1 is provided with an opening, which connects to an external conveying device to convey plastic granules into the material box 1. The plastic granules mentioned here are plastic granules that have been pre-cut but have not been separated and screened. The particle size range is large (for example, the particle size is 1-150mm), and they are mixed with plastic film, dust and other impurities.

[0061] The mixing mechanism 2 is horizontally fixed in the middle of the material box 1 and driven by a motor to perform preliminary mixing and cutting of the plastic granules that have just been added to the equipment. The conveying mechanism 3 is horizontally fixed inside the material box 1 and extends to the outside of the material box 1 from the left and right. Through the action of the conveying mechanism 3, the plastic granules that have been preliminarily mixed and cut can be horizontally conveyed to the left.

[0062] The distributing pipe 4 is fixed to the left end of the conveying mechanism 3 and is vertically arranged. The left end of the conveying mechanism 3 passes through the side wall of the distributing pipe 4 to convey plastic granules into the distributing pipe 4. The first discharge port is the opening at the top of the distributing pipe 4, and the second discharge port is the opening at the bottom of the distributing pipe 4. The negative pressure mechanism 5 is a negative pressure fan, which can be purchased commercially. In order to facilitate the conveying of the bottom material and the horizontal setting of the cutting blade of the crushing mechanism 6, in this embodiment, the second discharge port is specifically set on the left side of the distributing pipe 4. At the same time, an inclined circular pipe is set on the left side of the distributing pipe 4 to guide the plastic granules in the distributing pipe 4 to the lower left for output.

[0063] The crushing mechanism 6 includes a vertically mounted rotating shaft at the bottom of the distribution pipe 4. The top end of the shaft extends to the upper side of the second discharge port and to the lower side of the output end of the conveying mechanism 3, and a cutting blade is fixed to the top end of the shaft. The bottom end of the shaft extends to the lower side of the distribution pipe 4 and is connected to a drive motor, thus enabling secondary crushing of the plastic particles conveyed into the distribution pipe 4 by the conveying mechanism 3. Simultaneously, combined with the negative pressure mechanism 5, lightweight plastic films or particles can be collected upwards, improving the purity of the particles collected at the second discharge port.

[0064] In this embodiment, the conveying mechanism 3 and the material distribution pipe 4 are arranged in two or more evenly in front and behind.

[0065] In this technical solution, the conveying mechanism 3 and the material distribution pipe 4 are evenly arranged in four directions along the front and back.

[0066] In some technical solutions, the bottom of the material box 1 is provided with arc-shaped grooves corresponding to each conveying mechanism 3. The conveying mechanism 3 is coaxially arranged with the corresponding arc-shaped groove, which facilitates the gathering of materials in the material box 1 at the corresponding position of the arc-shaped groove and facilitates the conveying of the conveying mechanism 3.

[0067] In other technical solutions, multiple conveying mechanisms 3 share a single drive motor and are connected to each other via sprockets and chains.

[0068] In this embodiment, the conveying mechanism 3 includes:

[0069] The first drive motor 301 is fixedly mounted on the material box 1;

[0070] The rotating shaft 302 is horizontally rotatable on the material box 1, with one end extending to the outside of the material box 1 and the other end connected to the first drive motor 301;

[0071] The material box 1 is provided with a discharge hole, the material discharge pipe 303 is set in correspondence with the discharge hole, and the material distribution pipe 4 is fixed on the material discharge pipe 303;

[0072] The spiral blade 304 is fixed on the rotating shaft 302.

[0073] In this technical solution, the right end of the rotating shaft 302 is mounted on the right side wall of the material box 1 via a bearing and a bearing seat. The first drive motor 301 is fixed on the right side of the material box 1 and connected to the right end of the rotating shaft 302. The left end of the rotating shaft 302 extends to the left outer side of the material box 1. The discharge pipe 303 is coaxially mounted with the rotating shaft 302, and the discharge pipe 303 has a corresponding discharge hole on the left side wall of the material box 1.

[0074] In this embodiment, the conveying mechanism 3 further includes:

[0075] Multiple support blocks 305 are provided. The discharge pipe 303 is provided with a number of fixing holes equal to the number of support blocks 305. Each support block 305 is fixed at a corresponding fixing hole. The support block 305 extends to the inner side of the discharge pipe 303 and abuts against the spiral blade 304.

[0076] In this technical solution, four strip-shaped fixing holes are evenly provided on the periphery of the discharge pipe 303. A stud parallel to the radial direction is provided on each side of the outer wall of the discharge pipe 303 corresponding to the two strip-shaped fixing holes. The support block 305 has through holes corresponding to the studs, and is detachably and adjustablely mounted on the studs at the fixing holes using nuts. The inner surface of the support block 305 is machined into an arc-shaped surface equal to the outer diameter of the spiral blade 304, facilitating the stability of the support.

[0077] It is worth mentioning that if the left end of the rotating shaft 302 is supported, it is easy to cause vibration and wear; if a bearing and bearing seat similar to those on the right side of the rotating shaft 302 are used for support, it will occupy a lot of space in the distribution pipe 4 and reduce the effect of negative pressure adsorption. Therefore, the support block 305 is used for circumferential support to ensure the smooth conveying of plastic particles in the discharge pipe 303.

[0078] In this embodiment, the spiral blade 304 includes a first section 306 and a second section 307. The second section 307 is disposed on the side closer to the discharge pipe 303 than the first section 306, and the pitch of the second section 307 is greater than the pitch of the first section 306.

[0079] In this technical solution, the first section 306 is located on the right side, the second section 307 is located on the left side, and the second section 307 runs through the entire discharge pipe 303.

[0080] In some technical solutions, the pitch of the second section 307 is 1.2 to 1.5 times that of the pitch of the first section 306.

[0081] In this embodiment, the stirring mechanism 2 includes:

[0082] The second drive motor 201 is fixedly mounted on the material box 1;

[0083] The stirring shaft 202 is horizontally rotatable on the material box 1 and is connected to the second drive motor 201;

[0084] Multiple cutting blades 203 are staggered on the stirring shaft 202.

[0085] In this technical solution, the second drive motor 201 is fixed on the front side of the material box 1, the stirring shaft 202 is horizontally arranged on the material box 1, and multiple cutting blades 203 are coplanar and circumferentially fixed on the stirring shaft 202.

[0086] In some technical solutions, two or more coplanar and circumferentially uniform cutting blades 203 are uniformly arranged along the axial direction of the stirring shaft 202.

[0087] In other technical solutions, the cutting blades 203 are staggered and evenly arranged on the stirring shaft 202.

[0088] In this embodiment, it also includes:

[0089] Two guide plates 7 are symmetrically and inclinedly arranged inside the material box 1, and the stirring mechanism 2 is located on the lower side between the two guide plates 7.

[0090] In this technical solution, two guide plates 7 are symmetrically fixed or hinged within the material box 1. When the guide plates 7 are hinged, they are elastically supported by springs, maintaining a certain angle of inclination relative to the horizontal plane. The rotating shaft of the stirring mechanism 2 is centrally located below the two guide plates 7. This ensures that the plastic particles added to the material box 1 from the upper side are subjected to preliminary stirring and cutting by the stirring mechanism 2 as much as possible, reducing the possibility of the rotating shaft 302 of the conveying mechanism 3 being entangled by the plastic film mixed in with the plastic particles, and reducing the possibility of equipment downtime for maintenance.

[0091] In some technical solutions, the side of the material box 1 is provided with an observation window, which is sealed by transparent glass or acrylic sheet.

[0092] In this embodiment, it also includes:

[0093] The first end of the guide pipe 8 is connected to the first discharge port of the distribution pipe 4, and the height of the second end is lower than the height of the first end. The negative pressure mechanism 5 is connected to the guide pipe 8.

[0094] In this technical solution, the guide pipe 8 includes a left vertical section, a middle inclined section and a right vertical section connected in sequence. The left vertical section is connected to a material collection pipe or a woven material collection bag. The middle inclined section is lower on the left and higher on the right. The aforementioned first end and second end mainly refer to the two ends of the middle inclined section. The bottom end of the right vertical section is connected to the first discharge port. The negative pressure mechanism 5 is connected to the middle inclined section through a regulating valve.

[0095] In use, by intermittently opening and closing the negative pressure mechanism 5, the light particles or plastic film in the distribution pipe 4 are pulled left and right by the negative pressure adsorption into the middle inclined section. When the negative pressure mechanism 5 is closed, the light particles or plastic film slide down the middle inclined section to the left vertical section and are collected.

[0096] In some technical solutions, a wind deflector that is higher on the left and lower on the right is fixed in the middle inclined section. The upper and lower sides of the wind deflector are spaced from the pipe wall of the middle inclined section to improve the effect of the negative pressure mechanism 5 on the right side distribution pipe 4 and reduce the adsorption effect of the negative pressure mechanism 5 on the plastic particles or plastic film during the sliding process on the left side.

[0097] In other technical solutions, the cutting blade of the crushing mechanism 6 is inclined at a certain angle relative to the horizontal plane, so as to generate an upward wind force during the cutting process and enhance the negative pressure adsorption effect of the negative pressure mechanism 5.

[0098] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A plastic pellet mixing device, characterized in that, include: The material bin (1) is hollow and has a feed inlet; A stirring mechanism (2) is provided in the material box (1) and is provided corresponding to the feed inlet; The conveying mechanism (3) is horizontally arranged in the material box (1), located below the stirring mechanism (2), and its output end extends to the outside of the material box (1); The material distribution pipe (4) is connected to the output end of the conveying mechanism (3) and is vertically arranged outside the material box (1). The material distribution pipe (4) is provided with a first discharge port and a second discharge port. The first discharge port is higher than the output end of the conveying mechanism (3) and the second discharge port is lower than the output end of the conveying mechanism (3). The negative pressure mechanism (5) is connected to the first discharge port; The crushing mechanism (6) is located between the second discharge port and the output end of the conveying mechanism (3).

2. The plastic pellet mixing equipment according to claim 1, characterized in that, The conveying mechanism (3) and the material distribution pipe (4) are evenly arranged in two or more positions.

3. The plastic pellet mixing equipment according to claim 1, characterized in that, The conveying mechanism (3) includes: The first drive motor (301) is fixedly mounted on the material box (1); A rotating shaft (302) is horizontally rotatably mounted on the material box (1), with one end extending to the outside of the material box (1) and the other end connected to the first drive motor (301); The material box (1) is provided with a discharge hole, the material discharge pipe (303) is provided with a corresponding discharge hole, and the material distribution pipe (4) is fixed on the material discharge pipe (303); The helical blade (304) is fixed on the rotating shaft (302).

4. The plastic pellet mixing equipment according to claim 3, characterized in that, The conveying mechanism (3) also includes: Multiple support blocks (305) are provided. The discharge pipe (303) has a number of fixing holes equal to the number of support blocks (305). Each support block (305) is fixed at each of the fixing holes. The support block (305) extends to the side of the inner side of the discharge pipe (303) and abuts against the spiral blade (304).

5. The plastic pellet mixing equipment according to claim 3, characterized in that, The spiral blade (304) includes a first section (306) and a second section (307). The second section (307) is disposed on the side closer to the discharge pipe (303) than the first section (306). The pitch of the second section (307) is greater than the pitch of the first section (306).

6. The plastic pellet mixing equipment according to claim 1, characterized in that, The stirring mechanism (2) includes: The second drive motor (201) is fixedly mounted on the material box (1); The stirring shaft (202) is horizontally rotatably mounted on the material box (1) and connected to the second drive motor (201); Multiple cutting blades (203) are staggered on the stirring shaft (202).

7. The plastic pellet mixing equipment according to claim 1, characterized in that, Also includes: Two guide plates (7) are symmetrically and obliquely arranged inside the material box (1), and the stirring mechanism (2) is located on the lower side between the two guide plates (7).

8. The plastic pellet mixing equipment according to claim 1, characterized in that, Also includes: The guide pipe (8) has its first end connected to the first discharge port of the distribution pipe (4), and the height of its second end is lower than the height of the first end. The negative pressure mechanism (5) is connected to the guide pipe (8).

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