Extrusion production line for new bio-based materials of turnover boxes

Abstract

The present invention discloses an extrusion production line for turnover box bio-based new materials in the technical field of turnover box production. The extrusion production line for turnover box bio-based new materials includes a twin-screw extruder for extruding and producing bio-based new materials. A feeding system is provided above the twin-screw extruder. The feeding system includes a bamboo powder feeding mechanism for pre-treating bamboo powder. By setting up the bamboo powder feeding mechanism, the present invention abandons the traditional vibration screening method and adopts the vortex partition plate propulsion screening method. On the one hand, the machine does not have hard impact, with small damage and low maintenance rate. On the other hand, it can timely discharge the strip-shaped objects during screening without affecting the screening effect of continuous screening.

Description

Technical Field

[0001] The present invention relates to the technical field of the production of new material turnover boxes, specifically an extrusion production line for bio-based new materials of turnover boxes. Background Art

[0002] A turnover box is a box used to transport goods. To meet the characteristics of turnover, the requirements for turnover boxes are low manufacturing cost, green safety in terms of material properties, and no pollution to the environment after being discarded. Therefore, the research on turnover box materials has never stopped;

[0003] Patent Invention CN200810062198.0 discloses a bamboo powder-filled bio-based resin composite material and its preparation method. The bamboo powder-filled bio-based resin composite material is made of the following components in parts by weight: 20 - 60 parts of bamboo powder; 40 - 80 parts of bio-based resin; 0.8 - 5 parts of coupling agent; 0.2 - 0.6 parts of antioxidant; 0.1 - 0.7 parts of ultraviolet absorber. The hydrophilic and lipophobic bamboo powder and the lipophilic and hydrophobic bio-based resin are coupled through the coupling agent to improve the interfacial compatibility and bonding strength between the bamboo powder and the bio-based resin, and the respective advantages of the resin and plant fiber can be fully exerted, avoiding many problems of plastics sourced from fossil resources. Based on the all-biomass source of the composite material, it has excellent environmental degradability, and the obtained composite material has a good appearance, does not warp, and has a certain tensile and bending strength, meeting the performance requirements of turnover boxes.

[0004] However, during the crushing process of bamboo, it is easy to have strip-shaped fibers doped in the bamboo powder due to incomplete crushing; the uncrushed limiting strip-shaped objects may hinder the flow of materials during the extrusion process, resulting in increased wear of the screw and barrel components of the extruder, and even causing blockage or shutdown of the extruder. Summary of the Invention

[0005] The purpose of the present invention is to provide an extrusion production line for bio-based new materials of turnover boxes to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: An extrusion production line for bio-based new materials of turnover boxes, including a twin-screw extruder for extruding and producing bio-based new materials. A feeding system is provided above the twin-screw extruder. The feeding system includes a bamboo powder feeding mechanism for pre-treating bamboo powder. The bamboo powder feeding mechanism includes:

[0007] A screening box;

[0008] A first discharge port, communicating with the screening box and arranged below it;

[0009] A feeding cylinder for transporting bamboo powder into the screening box;

[0010] The screening mechanism is used for screening out the strips in the bamboo powder and discharging the strips out of the screening box from the first discharging port in real time.

[0011] As a further solution of the present invention, a double-screw feeding device is arranged in the screening box.

[0012] As a further solution of the present invention, the screening mechanism includes a sieve plate rotatably assembled with the inner wall of the screening box, the top surface of the sieve plate is provided with a vortex baffle fixedly connected to the screening box, and the sieve plate is connected to a driving assembly, and the driving assembly is used to drive the sieve plate to rotate.

[0013] As a further solution of the present invention, the driving assembly includes a ring gear, which is fixedly mounted on the bottom of the screen plate and coaxially arranged with the screen plate. The ring gear is meshed with a first gear, and the first gear is transmission-connected to a motor, and the motor is fixedly connected to the screening box.

[0014] As a further solution of the present invention, a first material pipe is installed on the first material outlet; a filter is arranged in the middle of the first material pipe; a transfer box is arranged on the outside of the first material pipe; the filter is located on the inside of the transfer box; the transfer box is fixedly installed on the outer side wall of the screening box; and a feed port is opened on the screening box, which is located on the side of the transfer box.

[0015] As a further solution of the present invention, a roller is rotatably installed on the inner wall of the screening box, and the roller is located below the double-screw feeding device; a plurality of rotating plates distributed in a circular array are fixedly connected to the roller, and a plurality of protrusions are installed on the rotating plate, and the top of the protrusion is set to be in the shape of a spike.

[0016] As a further solution of the present invention, a push plate is elastically slidably mounted on the rotating plate, an oblique slide groove is provided on the inner wall of the screening box, and a push rod is elastically slidably mounted in the oblique slide groove.

[0017] As a further solution of the present invention, a soft material guide plate is rotatably mounted on the inner wall of the screening box, and a torsion spring for resetting the soft material guide plate is mounted on the rotating shaft of the soft material guide plate; the soft material guide plate is located below the rotating plate, and a second material discharge port opened on the screening box is provided on the side of the soft material guide plate, and a second material pipe is provided on the outside of the second material discharge port.

[0018] As a further solution of the present invention, the second material pipe is connected to the first material pipe; a baffle is hinged on the inner wall of the first material pipe, a torsion spring is mounted on the rotating shaft of the baffle, and the baffle is located below the filter screen.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting up a bamboo powder feeding mechanism, the present invention abandons the traditional vibration screening method and adopts the screening method of advancing and screening with a vortex partition plate. On the one hand, the machine does not cause damage due to hard impact, with a low maintenance rate. On the other hand, it can timely discharge the strip-shaped objects during screening without affecting the screening effect of continuous screening.

[0021] 2. The present invention designs the structures of a rotating roller, a rotating plate, a pushing plate and bumps, which can pre-eliminate some strip-shaped objects and further reduce the screening pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the production line of the present invention;

[0023] Figure 2 is Figure 1 a partially enlarged view at B in

[0024] Figure 3 is a schematic diagram of the overall structure of the twin-screw extruder of the present invention;

[0025] Figure 4 is a schematic sectional view of the overall structure of the twin-screw extruder of the present invention;

[0026] Figure 5 is Figure 3 a partially enlarged view at A in

[0027] Figure 6 is a schematic diagram of a partial structure of the screening mechanism of the present invention;

[0028] Figure 7 is a schematic diagram of the structures of the rotating roller, the rotating plate, the bumps and the pushing plate of the present invention;

[0029] Figure 8 is a schematic diagram of the structures of the rotating plate, the bumps and the pushing plate of the present invention;

[0030] Figure 9 is a schematic diagram of the structures of the inclined chute and the push rod of the present invention.

[0031] In the drawings, the components represented by the reference numerals are as follows:

[0032] 1 - twin-screw extruder; 2 - three-roll calender; 3 - cooler; 4 - trimming machine; 6 - corona machine; 8 - tractor; 9 - coiler; 10 - feeding cylinder; 11 - screening box; 12 - double-helix feeding device; 13 - sieve plate; 14 - vortex partition plate; 16 - first discharge port; 17 - gear ring; 18 - first gear; 19 - motor; 20 - first material pipe; 21 - filter screen; 22 - transfer box; 23 - feed inlet; 24 - rotating roller; 25 - rotating plate; 26 - bump; 27 - pushing plate; 28 - inclined chute; 29 - push rod; 30 - soft material guide plate; 31 - second discharge port; 32 - second material pipe; 33 - baffle. Detailed implementation mode

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] Please refer to Figures 1-9 , the present invention provides a technical solution: an extrusion production line for turnover box bio-based new materials, including a twin-screw extruder 1 for extruding and producing bio-based new materials, and further including a three-roll calender 2, a cooler 3, a trimming machine 4, a corona machine 6, a tractor 8, and a coiler 9 for sequentially processing the extruded bio-based new materials. A feeding system is provided above the twin-screw extruder 1; it should be noted that the provided twin-screw extruder 1, three-roll calender 2, cooler 3, trimming machine 4, corona machine 6, tractor 8, and coiler 9 are existing equipment used in traditional extrusion production lines in the prior art. The specific structures, positional relationships, and functional relationships between the various equipment are all in the prior art and will not be elaborated.

[0035] The feeding system includes a bamboo powder feeding mechanism for preprocessing bamboo powder, and the bamboo powder feeding mechanism includes:

[0036] A screening box 11;

[0037] A first discharge port 16, which is communicated with the screening box 11 and is arranged below it;

[0038] A feeding cylinder 10 for conveying bamboo powder into the screening box 11;

[0039] A screening mechanism for screening out strip-shaped objects in the bamboo powder and discharging the strip-shaped objects from the first discharge port 16 out of the screening box 11 in real time.

[0040] The present invention aims to protect an extrusion production line that can perform screening and pretreatment on bamboo powder. When the bamboo powder enters the extrusion production line, the feeding cylinder 10 conveys the bamboo powder to be processed into the screening box 11. The bamboo powder enters the screening mechanism located in the screening box 11. The screening mechanism screens out strip-shaped objects in the bamboo powder and discharges the strip-shaped objects from the first discharge port 16 out of the screening box 11 in real time.

[0041] Furthermore, a double-screw feeding device 12 is arranged in the screening box 11; by setting the double-screw feeding device 12 and using the double-screw conveying blades in the double-screw feeding device 12, the input bamboo powder can be dispersed to a certain extent, which is more beneficial to subsequent screening work.

[0042] As a preferred embodiment of the present invention, the screening mechanism comprises a screen plate 13 rotatably assembled with the inner wall of the screening box 11, a vortex partition 14 fixedly connected with the screening box 11 is arranged on the top surface of the screen plate 13, and the screen plate 13 is connected with a driving assembly, and the driving assembly is used to drive the screen plate 13 to rotate;

[0043] During screening, the bamboo powder enters the screening box 11 from the feeding tube 10, and then falls onto the screen plate 13. The driving component drives the screen plate 13 to rotate, while the vortex partition 14 is fixed in position. The bamboo powder that falls onto the screen plate 13 moves synchronously with the screen plate 13. When the bamboo powder moves, it is blocked by the vortex partition 14 and moves along the path formed by the vortex partition 14 and the screen plate 13. During the movement, qualified bamboo powder will fall into the bottom discharge port of the screening box 11 through the sieve holes of the sieve plate 13 and then enter the feeding system to mix with other ingredients. The strips that cannot pass through the sieve holes of the sieve plate 13 move along the path formed by the vortex partition 14 and the sieve plate 13 during the rotation of the sieve plate 13 until they are discharged from the first discharge port 16.

[0044] Further, the driving assembly includes a gear ring 17, which is fixedly mounted on the bottom of the sieve plate 13 and arranged coaxially with the sieve plate 13, the gear ring 17 is meshed with a first gear 18, the first gear 18 is transmission-connected to a motor 19, and the motor 19 is fixedly connected to the sieve box 11;

[0045] The motor 19 is started, and the output shaft of the motor 19 can drive the sieve plate 13 to rotate through the first gear 18 and the ring gear 17 .

[0046] Furthermore, a first material pipe 20 is installed on the first discharge port 16; a filter screen 21 is provided in the middle of the first material pipe 20; a transfer box 22 is provided on the outside of the first material pipe 20; the filter screen 21 is located on the inner side of the transfer box 22; the transfer box 22 is fixedly installed on the outer wall of the screening box 11; and a feed port 23 located on the side of the transfer box 22 is opened on the screening box 11.

[0047] The filtered strips are moved out from the first discharge port 16 and enter the first material pipe 20; when the strips roll in the first material pipe 20, the bamboo powder on the surface thereof falls off and can enter the transfer box 22 through the filter screen 21, and the bamboo powder in the transfer box 22 can enter the screening box 11 through the feed port 23; the bamboo powder on the surface of the strips can be better removed, and more bamboo powder can be obtained by filtration.

[0048] Furthermore, a roller 24 is rotatably mounted on the inner wall of the screening box 11, and the roller 24 is located below the double-screw feeding device 12; a plurality of rotating plates 25 distributed in a circular array are fixedly connected to the roller 24, and a plurality of protrusions 26 are mounted on the rotating plate 25, and the top of the protrusion 26 is set to be spike-shaped.

[0049] The bamboo powder discharged from the feeding tube 10 will fall between the rotating plates 25 on the rotating roller 24; the rotating roller 24 and the rotating plate 25 willFigure 4 In the state shown, the roller 24 rotates counterclockwise (the end of the roller 24 is connected to a motor located outside the screening box 11, and the motor provides power for the rotation of the roller 24). When the bamboo powder falls onto the rotating plate 25, the protrusion 26 acts on the strips in the bamboo powder, and a part of the strips can be retained on the rotating plate 25 through the spikes on the top of the protrusion 26, thereby reducing the number of strips entering the screening mechanism and reducing the screening pressure of the screening mechanism.

[0050] Furthermore, the rotating plate 25 is elastically slidably mounted with a push plate 27 (see the attached Figure 8 The structure in the figure), an oblique slide groove 28 is provided on the inner wall of the screening box 11, and a push rod 29 is elastically slidably installed in the oblique slide groove 28; a soft material guide plate 30 (made of material such as rubber) is rotatably installed on the inner wall of the screening box 11, and a torsion spring for resetting the soft material guide plate 30 is mounted on the rotating shaft; the soft material guide plate 30 is located below the rotating plate 25, and a second material discharge port 31 opened on the screening box 11 is provided on the side of the soft material guide plate 30, and a second material pipe 32 is provided on the outer side of the second material discharge port 31.

[0051] The protrusion 26 penetrates the push plate 27. When the bamboo powder falls onto the protrusion 26, due to the design of the spikes on the protrusion 26, part of the strips will be retained on the rotating plate 25. When the roller 24 drives the rotating plate 25 and the push plate 27 to rotate counterclockwise until the push plate 27 contacts the push rod 29, the push rod 29 will drive the push plate 27 to move downward relative to the rotating plate 25, and the push plate 27 will push out the strips retained on the rotating plate 25, and the strips will fall off; then, the push plate 27 will drive the push rod 29 to slide in the oblique slide groove 28 until the push rod 29 slides out of the notch provided on the push plate 27, the push rod 29 will be staggered with the push plate 27, and then the push rod 29 and the push plate 27 will both be under the elastic force of the spring. The push rod 29 is used to push the push plate 27 to push the strips left on the rotating plate 25. The strips will fall onto the soft material guide plate 30, and then enter the second material pipe 32 from the second discharge port 31, and then enter the first material pipe 20. The strips can be discharged directly after falling off, which can greatly reduce the working pressure of the screen plate 13 and the vortex partition plate 14.

[0052] Furthermore, the second material pipe 32 is connected to the first material pipe 20 ; a baffle 33 is hinged on the inner wall of the first material pipe 20 , a torsion spring is sleeved on the rotating shaft of the baffle 33 , and the baffle 33 is located below the filter screen 21 .

[0053] By setting the baffle 33, the strips and the like falling into the first material pipe 20 can stay for a short time, and the bamboo powder attached to the surface of the strips and the like can be better dropped from the filter screen 21 into the transfer box 22, so that the bamboo powder can be better utilized. After the strips and the like are accumulated to a certain amount, the baffle 33 will automatically open under the action of gravity, and then the strips can fall from the bottom of the first material pipe 20.

[0054] Working principle: When the extrusion production line is working, the material is first loaded. The feeding system mixes the bamboo powder and the auxiliary materials and conveys them to the twin-screw extruder 1 to complete the extrusion of the turnover box bio-based new material. Then, the three-roll calender 2, the cooler 3, the trimmer 4, the corona machine 6, and the traction machine 8 successively post-process the extruded turnover box bio-based new material, and finally reel it onto the winder 9 to complete the extrusion production of the turnover box bio-based new material.

[0055] The bamboo powder feeding mechanism in the feeding system performs screening pretreatment on the input bamboo powder, specifically as follows: after the crushed bamboo powder is transported to the feeding cylinder 10 of the bamboo powder feeding mechanism, the double-screw feeding device 12 will transport the bamboo powder to the screening box 11, and the bamboo powder output from the feeding cylinder 10 will fall between the rotating plates 25 on the rotating roller 24; the rotating roller 24 and the rotating plate 25 will be Figure 4 In the state shown, the roller 24 rotates counterclockwise (wherein the end of the roller 24 is externally connected to a motor located outside the screening box 11, and the motor provides power for the rotation of the roller 24). When the bamboo powder falls onto the rotating plate 25, the protrusion 26 acts on the strips in the bamboo powder, and a part of the strips can be left on the rotating plate 25 through the spikes on the top of the protrusion 26, thereby reducing the number of strips entering the screening mechanism and reducing the screening pressure of the screening mechanism; when the roller 24 drives the rotating plate 25 and the push plate 27 to rotate counterclockwise until the push plate 27 contacts the push rod 29, the push rod 29 will drive the push plate 27 to move downward relative to the rotating plate 25, and the push plate 27 will push out the strips retained on the rotating plate 25, and the strips will fall; then, the push plate 27 will drive the push rod 29 to slide in the oblique slide groove 28 The push rod 29 is moved until the push rod 29 slides out of the slot on the push plate 27, the push rod 29 will be staggered with the push plate 27, and then the push rod 29 and the push plate 27 will return to the initial position under the elastic force of the spring; the rotation axis of the soft material guide plate 30 is located at the bottom, and the top end is a free end; when the push plate 27 rotates, it can drive the soft material guide plate 30 to rotate around the bottom rotation axis, and the top end of the soft material guide plate 30 when rotating is always in contact with the side wall of the push plate 27 located below the push rod 29. After the push rod 29 drives the push plate 27 to push out the strips retained on the rotating plate 25, the strips will fall onto the soft material guide plate 30, and then enter the second material pipe 32 from the second discharge port 31, and then enter the first material pipe 20; the strips can be directly discharged after falling off;

[0056] Subsequently, the bamboo powder will fall onto the sieve plate 13, and the bamboo powder will be distributed on the path formed by the vortex partition plate 14 and the sieve plate 13; the motor 19 is started to drive the first gear 18 to rotate, and the first gear 18 will drive the sieve plate 13 to rotate through the gear ring 17. When the bamboo powder moves, it is blocked by the vortex partition plate 14 and will move along the path formed by the vortex partition plate 14 and the sieve plate 13. During the movement, the qualified bamboo powder will fall into the discharge through-hole at the bottom of the sieve box 11 through the sieve holes of the sieve plate 13 and then enter the feeding system to be mixed with other ingredients. The strip-shaped objects that cannot pass through the sieve holes of the sieve plate 13 will move along the path formed by the vortex partition plate 14 and the sieve plate 13 during the rotation of the sieve plate 13 until they are discharged at the first discharge port 16; the screening of the bamboo powder and the conveying of the strip-shaped objects can be carried out in real time, which can ensure that the strip-shaped objects will not accumulate on the top of the sieve plate 13 to hinder the screening of the bamboo powder by the sieve plate 13, and can greatly improve the efficiency of bamboo powder screening. At the same time, when the strip-shaped objects move along the vortex partition plate 14, the collision between the strip-shaped objects and the vortex partition plate 14 can cause the bamboo powder attached to its surface to fall off, which can make full use of the bamboo powder; the filtered strip-shaped objects will enter the first material pipe 20 after being removed from the first discharge port 16; when the strip-shaped objects roll in the first material pipe 20, the bamboo powder on their surface can fall off and enter the transfer box 22 through the filter screen 21, and the bamboo powder in the transfer box 22 can enter the sieve box 11 from the feed port 23; this can make the bamboo powder on the surface of the strip-shaped objects fall off better, and more bamboo powder can be obtained by filtration.

Claims

1. An extrusion production line for bio-based new materials for turnover boxes, comprising a twin-screw extruder (1) for extruding and producing bio-based new materials, wherein a feeding system is provided above the twin-screw extruder (1), characterized in that: The feeding system comprises a bamboo powder feeding mechanism for pre-treating bamboo powder, and the bamboo powder feeding mechanism comprises: a screening box (11); A first discharge port (16) is connected to the screening box (11) and is arranged below the screening box (11); A feeding cylinder (10) is used to convey the bamboo powder into a screening box (11); A screening mechanism, used for screening out the strips in the bamboo powder and discharging the strips out of the screening box (11) from the first discharge port (16) in real time; A roller (24) is rotatably mounted on the inner wall of the screening box (11), and the roller (24) is located below the double-screw feeding device (12); a plurality of rotating plates (25) distributed in a circular array are fixedly connected to the roller (24), and a plurality of protrusions (26) are mounted on the rotating plates (25), and the top ends of the protrusions (26) are arranged in a spike shape; The rotating plate (25) is elastically slidably mounted with a push plate (27); an oblique slide groove (28) is provided on the inner wall of the screening box (11); a push rod (29) is elastically slidably mounted in the oblique slide groove (28); A soft material guide plate (30) is rotatably mounted on the inner wall of the screening box (11), and a torsion spring for resetting the soft material guide plate (30) is mounted on the rotating shaft of the soft material guide plate (30); the soft material guide plate (30) is located below the rotating plate (25), and a second material discharge port (31) opened on the screening box (11) is arranged on the side of the soft material guide plate (30), and a second material pipe (32) is arranged outside the second material discharge port (31).

2. The extrusion production line according to claim 1, characterized in that: A double-screw feeding device (12) is arranged in the screening box (11).

3. The extrusion production line according to claim 1 or 2, characterized in that: The screening mechanism comprises a screen plate (13) rotatably mounted on the inner wall of a screening box (11); a vortex baffle (14) fixedly connected to the screening box (11) is arranged on the top surface of the screen plate (13); and the screen plate (13) is connected to a driving assembly, and the driving assembly is used to drive the screen plate (13) to rotate.

4. The extrusion production line according to claim 3, characterized in that: The driving assembly comprises a gear ring (17), the gear ring (17) is fixedly mounted on the bottom of the sieve plate (13) and is coaxially arranged with the sieve plate (13), the gear ring (17) is meshed with a first gear (18), the first gear (18) is transmission-connected to a motor (19), and the motor (19) is fixedly connected to the sieve box (11).

5. The extrusion production line according to claim 4, characterized in that: A first material pipe (20) is installed on the first material outlet (16); a filter screen (21) is arranged in the middle of the first material pipe (20); a transfer box (22) is arranged on the outside of the first material pipe (20); the filter screen (21) is located on the inside of the transfer box (22); the transfer box (22) is fixedly installed on the outer wall of the screening box (11); and a feed port (23) is opened on the screening box (11) and is located on the side of the transfer box (22).

6. The extrusion production line according to claim 1, characterized in that: The second material pipe (32) is connected to the first material pipe (20); a baffle (33) is hinged on the inner wall of the first material pipe (20), a torsion spring is mounted on the rotating shaft of the baffle (33), and the baffle (33) is located below the filter screen (21).

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