Polylactic acid and wood fiber mixing device
By designing a mixing device for inner barrel and outer barrel structure, the rotation and shrinkage mechanism of the lever and plate are used to solve the problem of filamentous wood fibers, and high-quality and uniform mixing of polylactic acid and wood fibers is achieved.
Patent Information
- Application Number
- CN202422337224.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-24
AI Technical Summary
In the prior art, filamentous wood fibers are easily wrapped around the mixing rod, affecting the mixing quality of polylactic acid and wood fibers.
A polylactic acid and wood fiber mixing device is designed, including an inner barrel and an outer barrel. The mixing rod is rotatably connected at the center of the bottom side wall of the inner barrel. A mixing piece is provided on the mixing rod. The mixing piece consists of a mixing plate, a push plate, a lever and a lever. The lever and a lever are avoided from wrapping the wood fibers through the rotation and shrinkage of the lever and the lever, and uniform mixing is achieved by combining the circulating flow of the inner and outer barrels.
It effectively avoids the entanglement of wood fibers, improves the mixing quality and uniformity, and ensures the full fusion of polylactic acid and wood fibers.
Smart Images
Figure CN223058106U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of polylactic acid and wood fiber mixing, in particular to a device for mixing polylactic acid and wood fiber. Background Technique
[0002] Polylactic acid is famous for its good biocompatibility, processability and degradability, but its high brittleness and relatively high cost limit its wide application. Wood fiber is well-known for its high strength, low density and good heat insulation and sound insulation performance, and at the same time, it has low cost and rich resources. Mixing the two can not only utilize the biodegradable characteristics of polylactic acid to reduce environmental pollution, but also improve the mechanical properties of the material and reduce the cost by adding wood fiber.
[0003] In the prior art, when fusing polylactic acid and wood fiber, the polylactic acid is heated to a molten state and then stirred and fused with a certain amount of wood fiber. However, there are various states of the wood fiber material, mostly in powder, filament and granular forms. The common mixing state is powder or filament, but when the filamentous wood fiber is mixed with polylactic acid, the filamentous wood fiber is easily wound around the impeller of the stirring rod for stirring and mixing, thus affecting the mixing of wood fiber and polylactic acid, and further affecting the quality of the mixture of polylactic acid and wood fiber. Content of the Utility Model
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a device for mixing polylactic acid and wood fiber, so as to solve the technical problems mentioned in the above background technique.
[0005] The above technical purpose of the utility model is achieved through the following technical solutions:
[0006] A device for mixing polylactic acid and wood fiber, comprising an outer barrel and an inner barrel. The inner barrel is fixedly installed at the center of the inner bottom side of the outer barrel. A mixing rod is rotatably connected to the side of the center of the bottom side wall of the inner barrel. A mixing member is arranged on the mixing rod, and an auxiliary member is arranged on the side wall of the inner barrel.
[0007] The mixing member includes a mixing plate, a pushing plate, springs, a shifting rod and a shifting plate. The mixing plate and the pushing plate are combined into a cross shape and fixedly installed on the mixing rod. A number of movable holes are provided at both ends of the mixing plate. Chute grooves are respectively provided at both ends of the pushing plate. The number of the springs is several, and several springs are respectively fixedly installed on the inner side walls of the corresponding movable holes and the chute grooves. The number of the shifting rods corresponds to the number of the movable holes. Several shifting rods are respectively slidably installed in the movable holes, and the ends of the shifting rods are fixedly connected to the corresponding springs. The number of the shifting plates corresponds to the number of the chute grooves, and two shifting plates are respectively slidably installed in the corresponding chute grooves. The side of the shifting plate is fixedly connected to the corresponding spring.
[0008] In a preferred example of the present utility model, it can be further configured that the bottom side of the shifting plate passes through the chute groove and fits against the bottom side wall of the inner barrel. The ends of the mixing plate, the pushing plate, the shifting rod and the shifting plate are all arc-shaped.
[0009] In a preferred example of the present utility model, it can be further configured that a gap is left between two adjacent shifting rods, and the ends of the shifting rod and the shifting plate are both in contact with the inner side wall of the inner barrel.
[0010] In a preferred example of the present utility model, it can be further configured that a cover is fixedly connected to the top side of the inner barrel, a driving motor is fixedly installed on the top side of the cover, and the output end of the driving motor is drivingly connected to the mixing rod.
[0011] In a preferred example of the present utility model, it can be further configured that the auxiliary member includes an outflow hole, the outflow hole is provided at the bottom of the circumferential side of the inner barrel, and an inner flow notch is provided at the top of the circumferential side of the inner barrel.
[0012] In a preferred example of the present utility model, it can be further configured that a one-way valve is provided in the outflow hole.
[0013] In summary, the present utility model includes at least one of the following beneficial technical effects:
[0014] 1. When in use, the mixing device for polylactic acid and wood fiber can contract through the shifting rod during rotation. While mixing the polylactic acid and the wood fiber, it avoids the filamentous wood fiber from winding around the shifting rod, improves the mixing quality of the wood fiber and the polylactic acid, and at the same time enables the polylactic acid and the wood fiber to circulate between the inner barrel and the outer barrel, improves the uniformity during the mixing of the wood fiber and the polylactic acid, and further improves the mixing quality of the polylactic acid and the wood fiber.
[0015] 2. The poly(lactic acid) and wood fiber mixing device is provided with the bottom of the baffle plate fitting against the inner bottom side wall of the inner barrel, avoiding dead corners in mixing, ensuring that all the poly(lactic acid) and wood fibers can be stirred and mixed together. The ends of the mixing plate, the pushing plate, the baffle rod and the baffle plate are all arc-shaped, avoiding jamming against the inner side wall of the inner barrel, making their arcs fit the inner side wall of the inner barrel, and enabling the smooth stirring of the poly(lactic acid) and wood fibers.
[0016] 3. In the poly(lactic acid) and wood fiber mixing device, when the baffle rod retracts into the movable hole, the corresponding baffle plate gradually contracts into the sliding groove. As a result, the mixture of poly(lactic acid) and wood fibers is gradually pushed to the outflow hole, thereby pushing the poly(lactic acid) into the outer barrel. At the same time, a certain amount of poly(lactic acid) and wood fibers can be poured into the outer barrel, enabling them to enter the inner barrel through the inner flow notch. When the poly(lactic acid) in the inner barrel is pushed into the outer barrel, it can return to the inner barrel through the inner flow notch again, causing the poly(lactic acid) and wood fibers to circulate during mixing, further ensuring that all the poly(lactic acid) is fully mixed during mixing, avoiding the phenomenon of missed mixing and stirring, and improving the mixing uniformity. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0018] Figure 1 It is a schematic diagram of the overall structure of a poly(lactic acid) and wood fiber mixing device of the present invention.
[0019] Figure 2 It is a schematic diagram of the internal structure of the inner box of a poly(lactic acid) and wood fiber mixing device of the present invention.
[0020] Figure 3 It is a schematic diagram of the internal structure of the movable hole and the sliding groove of a poly(lactic acid) and wood fiber mixing device of the present invention.
[0021] In the figure, 1, outer barrel; 2, inner barrel; 3, mixing rod; 4, mixing part; 5, auxiliary part; 6, mixing plate; 7, pushing plate; 8, spring; 9, baffle rod; 10, baffle plate; 11, movable hole; 12, sliding groove; 13, cover; 14, drive motor; 15, outflow hole; 16, inner flow notch; 17, one-way valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The following further elaborates on the present invention in detail with reference to the drawings.
[0023] Embodiment:
[0024] Reference Figures 1 - 3 Figures 1 - 3 , a polylactic acid and wood fiber mixing device disclosed by the present utility model includes an outer barrel 1 and an inner barrel 2. The inner barrel 2 is fixedly installed at the center of the inner bottom side of the outer barrel 1. A mixing rod 3 is rotatably connected to the side of the center of the bottom side wall of the inner barrel 2. A mixing member 4 is arranged on the mixing rod 3, and an auxiliary member 5 is arranged on the side wall of the inner barrel 2;
[0025] The mixing member 4 includes a mixing plate 6, a push plate 7, a spring 8, a dial rod 9 and a dial plate 10. The mixing plate 6 and the push plate 7 are combined into a cross shape and fixedly installed on the mixing rod 3. A number of movable holes 11 are opened at both ends of the mixing plate 6. Slide grooves 12 are respectively opened at both ends of the push plate 7. The number of the springs 8 is several, and several of the springs 8 are respectively fixedly installed on the inner side wall of the corresponding movable hole 11 and the slide groove 12. The number of the dial rods 9 corresponds to the number of the movable holes 11. Several of the dial rods 9 are respectively slidably installed in the movable holes 11, and the end of the dial rod 9 is fixedly connected to the corresponding spring 8. The number of the dial plates 10 corresponds to the number of the slide grooves 12, and two of the dial plates 10 are respectively slidably installed in the corresponding slide grooves 12. The side of the end of the dial plate 10 is fixedly connected to the corresponding spring 8.
[0026] In this embodiment, molten polylactic acid is poured into the inner barrel 2. At this time, the rotation of the mixing plate 6 and the push plate 7 is driven by the arranged mixing rod 3. Since the mixing rod 3 is eccentrically arranged in the inner barrel 2, as the mixing plate 6 and the push plate 7 follow the rotation of the mixing rod 3, the ends of the push plate 7 and the mixing plate 6 gradually approach the inner side wall of the inner barrel 2 and then gradually move away from the inner side wall of the inner barrel 2 in a reciprocating cycle. At this time, when the corresponding end of the mixing plate 6 gradually moves away from the inner side wall of the inner barrel 2, the spring 8 will push the dial rod 9 at this time, so that the end of the dial rod 9 always fits the inner side wall of the inner barrel 2. Thus, the polylactic acid and wood fiber are mixed by the arranged dial rod 9, and all the wood fibers can be dispersed. After the wood fibers are dispersed, the dial rod 9 will gradually be squeezed by the inner side wall of the inner barrel 2 at this time, so that the dial rod 9 retracts into the movable hole 11. At the same time, the residual wood fibers on the dial rod 9 are scraped off by the inner side wall of the opening of the movable hole 11, so as to avoid the wood fibers being wound on the dial rod 9, thereby affecting the mixing of the wood fibers and polylactic acid. The arranged dial plate 10 has the same movement mode as the above-mentioned dial rod 9, and is mainly used to dial the polylactic acid to rotate continuously, so as to facilitate the synchronous fusion of the polylactic acid and wood fiber.
[0027] In a further preferred embodiment of the present utility model, as Figures 1 - 3 shown, the bottom side of the dial plate 10 passes through the slide groove 12 and fits the bottom side wall of the inner barrel 2. The ends of the mixing plate 6, the push plate 7, the dial rod 9 and the dial plate 10 are all arc-shaped.
[0028] In this embodiment, the bottom of the set deflector 10 is attached to the inner bottom side wall of the inner barrel 2, avoiding dead corners in the mixing, ensuring that all polylactic acid and wood fibers can be stirred together. The ends of the mixing plate 6, the push plate 7, the dial rod 9 and the deflector 10 are all arc-shaped, avoiding jamming the inner side wall of the inner barrel 2, making its arc fit the inner side wall of the inner barrel 2, and being able to smoothly stir the polylactic acid and wood fibers.
[0029] In a further preferred embodiment of the present utility model, as Figures 1 - 3 shown, there is a gap between two adjacent ones of the said dial rods 9, and the ends of the said dial rods 9 and the said deflector 10 are all attached to the inner side wall of the said inner barrel 2.
[0030] In this embodiment, a gap is provided between two adjacent ones of the set dial rods 9, so that the polylactic acid and wood fibers can be stirred in a fork-like form, and then the effect of dispersing the wood fibers and melting them with the polylactic acid can be achieved.
[0031] In a further preferred embodiment of the present utility model, as Figures 1 - 3 shown, a cover 13 is fixedly connected to the top side of the inner barrel 2, a drive motor 14 is fixedly installed on the top side of the cover 13, and the output end of the drive motor 14 is drivingly connected to the mixing rod 3.
[0032] In this embodiment, the set drive motor 14 can drive the rotation of the mixing rod 3, and then drive the rotation of the mixing plate 6 and the push plate 7, so that the mixing plate 6 and the push plate 7 can drive the corresponding dial rods 9 and deflectors 10 to contract during the rotation, and then achieve the effect of stirring and mixing the polylactic acid and wood fibers while preventing the wood fibers from being wound around the dial rods 9.
[0033] In a further preferred embodiment of the present utility model, as Figures 1 - 3 shown, the auxiliary member 5 includes an outflow hole 15, the outflow hole 15 is opened at the bottom of the circumferential side of the inner barrel 2, an inner flow notch 16 is opened at the top of the circumferential side of the inner barrel 2, and a one-way valve 17 is arranged in the outflow hole 15.
[0034] In this embodiment, when the externally reserved hole is set and the shift lever 9 retracts into the movable hole 11, the corresponding shift plate 10 also gradually contracts into the sliding groove 12, thereby gradually pushing the mixture of polylactic acid and wood fiber to the outflow hole 15, so as to push the polylactic acid into the outer barrel 1. At the same time, a certain amount of polylactic acid and wood fiber can be poured into the outer barrel 1, enabling it to enter the inner barrel 2 through the inner flow notch 16. Thus, when the polylactic acid in the inner barrel 2 is pushed into the outer barrel 1, it can return to the inner barrel 2 again through the inner flow notch 16, causing the polylactic acid and wood fiber to circulate during mixing, further ensuring that all of the polylactic acid is fully mixed during mixing, avoiding the phenomenon of missed mixing and stirring, and improving the mixing uniformity.
[0035] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.
Claims
1. A polylactic acid and wood fiber mixing device, comprising an outer barrel (1) and an inner barrel (2), characterized in that, The inner barrel (2) is fixedly installed at the center of the inner bottom side of the outer barrel (1). A mixing rod (3) is rotatably connected to the side of the center of the bottom side wall of the inner barrel (2). A mixing member (4) is arranged on the mixing rod (3), and an auxiliary member (5) is arranged on the side wall of the inner barrel (2). The mixing member (4) includes a mixing plate (6), a push plate (7), a spring (8), a dial rod (9) and a dial plate (10). The mixing plate (6) and the push plate (7) are combined into a cross shape and fixedly installed on the mixing rod (3). A number of movable holes (11) are formed at both ends of the mixing plate (6). Chute grooves (12) are respectively formed at both ends of the push plate (7). The number of the springs (8) is several, and several of the springs (8) are respectively fixedly installed on the inner side wall of the corresponding movable hole (11) and the chute groove (12). The number of the dial rods (9) corresponds to the number of the movable holes (11). Several of the dial rods (9) are respectively slidably installed in the movable holes (11), and the end of the dial rod (9) is fixedly connected to the corresponding spring (8). The number of the dial plates (10) corresponds to the number of the chute grooves (12), and two of the dial plates (10) are respectively slidably installed in the corresponding chute grooves (12). The side of the end of the dial plate (10) is fixedly connected to the corresponding spring (8).
2. The poly(lactic acid) and wood fiber mixing device according to claim 1, characterized in that, The bottom side of the dial plate (10) passes through the chute groove (12) and fits against the bottom side wall of the inner barrel (2). The ends of the mixing plate (6), the push plate (7), the dial rod (9) and the dial plate (10) are all arc-shaped.
3. The poly(lactic acid) and wood fiber mixing device according to claim 1, wherein, A gap is left between two adjacent ones of the dial rods (9). The ends of the dial rod (9) and the dial plate (10) are both in contact with the inner side wall of the inner barrel (2).
4. A polylactic acid and wood fiber mixing device according to claim 1, characterized in that, A cover (13) is fixedly connected to the top side of the inner barrel (2). A driving motor (14) is fixedly installed on the top side of the cover (13). The output end of the driving motor (14) is drivingly connected to the mixing rod (3).
5. A polylactic acid and wood fiber mixing device according to claim 1, characterized in that, The auxiliary member (5) includes an outflow hole (15). The outflow hole (15) is formed at the bottom of the circumferential side of the inner barrel (2). An inner flow notch (16) is formed at the top of the circumferential side of the inner barrel (2).
6. The poly(lactic acid) and wood fiber mixing device according to claim 5, wherein, A one-way valve (17) is arranged in the outflow hole (15).