High-transparency polypropylene raw material mixer
By combining the spiral mixing blades and drive rod, the problem of uneven mixing in the high-transparency polypropylene raw material mixer is solved, resulting in more efficient mixing and extended equipment life.
Patent Information
- Application Number
- CN202423085056.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing high-transparency polypropylene raw material mixers suffer from unsatisfactory mixing effects, large deviations in raw material concentration, and high axial back-mixing coefficients during the mixing process, resulting in inconsistent product transparency, shortened equipment lifespan, and increased costs.
The mixing process employs a combination of spiral stirring blades and a drive rod. The first spiral stirring blade moves in a circular motion within the inner casing, while the second spiral stirring blade rotates to assist in mixing, reduce dead zones, and improve the uniformity of mixing.
It improves mixing efficiency, reduces dead zones, lowers raw material concentration deviation and axial back-mixing coefficient, and ensures consistent equipment lifespan and product transparency.
Smart Images
Figure CN223493615U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polypropylene raw material mixing technology, and in particular to a high-transparency polypropylene raw material mixing machine. Background Technology
[0002] In recent years, with the continuous development of my country's economy and the sustained improvement of consumption levels, the plastics processing industry has faced challenges from new demand trends such as "functionalization," "lightweighting," and "micro-molding." This is particularly true in the field of transparent polypropylene injection molded products, such as medical devices, food storage containers, and food storage boxes, where market demand is growing rapidly, driving the rapid development of polypropylene injection molding technology and the upgrading of production equipment. Polypropylene (PP), as a cost-effective and rigid general-purpose plastic, has seen its applications continuously expand. To meet the market's demand for high-quality, high-transparency polypropylene products, manufacturers are adopting advanced manufacturing processes and high-quality raw materials to improve product performance and appearance. At the same time, with the increasing awareness of health and environmental protection among consumers, non-toxic, odorless, and recyclable polypropylene products are becoming increasingly popular. Polypropylene products require mixing of raw materials using a mixer before production; however, most existing high-transparency polypropylene raw material mixers still have problems that need to be solved during use.
[0003] Most existing high-transparency polypropylene raw material mixers use turbine-type or anchor-type agitator blades, which result in unsatisfactory mixing effects. During mixing, there are significant deviations in raw material concentration and a high axial back-mixing coefficient. When there are significant deviations in raw material concentration, the final product may exhibit inconsistencies in optical, physical, and chemical properties, affecting the transparency of the finished product. A high back-mixing coefficient also means that the material flow within the mixer is not smooth, which may increase the wear of the agitator blades, shorten the service life of the equipment, and lead to frequent replacement of agitator blades, increasing costs. There is an urgent need to solve these problems. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-transparency polypropylene raw material mixing machine.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A high-transparency polypropylene raw material mixer includes a main body reactor. The main body reactor includes an outer casing and an inner casing. The inner casing is disposed inside the outer casing. A cover is installed on the top of the outer casing. Four L-shaped plates are fixedly connected to the bottom of the cover. Each of the four L-shaped plates is fixedly connected to the same toothed ring. The toothed ring meshes with two gears. A motor is fixedly connected to the top of the cover. The output end of the motor passes through the cover and is fixedly connected to a rotating shaft. A U-shaped plate is sleeved on the rotating shaft. The rotating shaft is rotatably connected to the U-shaped plate, and the U-shaped plate is fixedly connected to... At the bottom of the box cover, a fixing plate is fixedly connected to the outer wall of the bottom end of the rotating shaft. I-shaped wheels are threaded through both ends of the fixing plate, and these wheels are rotatably connected to the fixing plate. Fixing mechanisms are provided at the bottom of both I-shaped wheels and the bottom of the rotating shaft. A first drive rod is located at the bottom of the fixing mechanism at the bottom of the rotating shaft. Two first spiral stirring paddles are fixedly connected to the outer wall of the first drive rod. Second drive rods are located at the bottom of the fixing mechanisms at both ends. Two second spiral stirring paddles are fixedly connected to the outer wall of the second drive rods. The spiral stirring paddles are used to control material concentration deviation and axial back-mixing coefficient. This technology performs well in several aspects. It employs a spiral stirring blade and a combination of a first spiral stirring blade and a second drive rod for mixing. As the first spiral stirring blade rotates, it stirs the polypropylene raw material. The second spiral stirring blade moves in a circular motion within the inner casing, and while moving, it also rotates, assisting in mixing and reducing dead zones. This effectively solves the problems mentioned in the background section, where most existing high-transparency polypropylene raw material mixers use turbine or anchor-type stirring blades, resulting in unsatisfactory mixing effects, significant deviations in raw material concentration, and high axial back-mixing coefficients. When the raw material concentration deviates significantly, the final product may exhibit inconsistencies in optical, physical, and chemical properties, affecting the transparency of the finished product. A high back-mixing coefficient also means poor material flow within the mixer, potentially increasing blade wear, shortening equipment lifespan, and requiring frequent blade replacements, thus increasing costs. This technology achieves superior mixing effects, effectively improving mixing efficiency, reducing dead zones, enhancing mixing uniformity, lowering raw material concentration deviations and axial back-mixing coefficients, and ensuring equipment lifespan.
[0007] As a further embodiment of this utility model, the fixing mechanism includes a circular plate with a square groove at the bottom. Two positioning rods are arranged in the square groove and are fixedly connected to the circular plate. Two guide rods are passed through both ends of the circular plate and are fitted with springs. The springs are arranged in the square groove. The two guide rods at the same end are fixedly connected to the same square plate. Limiting rods are fixedly connected to the two square plates on their adjacent sides. A lever is provided at the bottom of the square plate.
[0008] As a further embodiment of this utility model, the top of both the first drive rod and the second drive rod are provided with two positioning holes, which are adapted to the positioning rod.
[0009] As a further embodiment of this utility model, limit holes are provided on both sides of the top end of the first drive rod and the second drive rod, and the limit holes are adapted to the limit rods.
[0010] As a further embodiment of this utility model, a plurality of heating plates are installed on the inner wall of the outer casing, and the heating plates are in close contact with the outer wall of the inner casing.
[0011] As a further embodiment of this utility model, a thermostat is installed on the outer wall of the outer casing, and the thermostat is electrically connected to the heating plate via a wire.
[0012] As a further embodiment of this utility model, the top of the box cover is provided with a feed pipe and a catalyst injection pipe, and the feed pipe is provided with a sealing cap.
[0013] As a further embodiment of this utility model, a discharge pipe is provided at the bottom of the main body of the mixer reactor.
[0014] As a further embodiment of this utility model, a valve is provided on the discharge pipe.
[0015] The beneficial effects of this utility model are as follows:
[0016] This invention utilizes a spiral stirring blade and a first spiral stirring blade in conjunction with a second drive rod for mixing. As the first spiral stirring blade rotates, it stirs the polypropylene raw material. Simultaneously, the second spiral stirring blade rotates within the inner casing, assisting in mixing and reducing dead zones. This effectively solves the problems raised in the background art, where most existing high-transparency polypropylene raw material mixers use turbine or anchor-type stirring blades, resulting in unsatisfactory mixing effects, significant deviations in raw material concentration, and high axial back-mixing coefficients. When raw material concentration deviates significantly, the final product may exhibit inconsistencies in optical, physical, and chemical properties, affecting the transparency of the finished product. A high back-mixing coefficient also indicates poor material flow within the mixer, potentially increasing blade wear, shortening equipment lifespan, and requiring frequent blade replacements, thus increasing costs. This invention achieves superior mixing effects, effectively improving mixing efficiency, reducing dead zones, enhancing mixing uniformity, lowering raw material concentration deviations and axial back-mixing coefficients, and ensuring equipment lifespan. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of a high-transparency polypropylene raw material mixer proposed in this utility model;
[0018] Figure 2 This is a partial structural diagram of a high-transparency polypropylene raw material mixer proposed in this utility model;
[0019] Figure 3 This is a schematic diagram of the inner box structure of a high-transparency polypropylene raw material mixer proposed in this utility model.
[0020] Figure 4 This is a schematic diagram of the internal structure of the inner box of a high-transparency polypropylene raw material mixer proposed in this utility model.
[0021] Figure 5 This is a schematic diagram of the unfolded structure of the fixed plate of a high-transparency polypropylene raw material mixer proposed in this utility model.
[0022] Figure 6 This is a schematic diagram of the fixing mechanism of a high-transparency polypropylene raw material mixer proposed in this utility model;
[0023] Figure 7 This is a cross-sectional view of the fixed mechanism of a high-transparency polypropylene raw material mixer proposed in this utility model.
[0024] In the diagram: 1. Main body of the mixer reactor; 101. Outer box; 102. Inner box; 103. Box cover; 2. L-shaped plate; 3. Gear ring; 4. Gear; 5. Motor; 6. Rotating shaft; 7. Fixing plate; 701. I-beam wheel; 8. Fixing mechanism; 801. Circular plate; 802. Square groove; 803. Positioning rod; 804. Guide rod; 805. Spring; 806. Square plate; 807. Limiting rod; 9. Limiting hole; 10. First drive rod; 11. First spiral agitator; 12. Second drive rod; 13. Second spiral agitator; 14. Heating plate; 15. U-shaped plate; 16. Temperature controller; 17. Feed pipe; 18. Catalyst injection pipe; 19. Discharge pipe; 20. Positioning hole. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and implementing regulations.
[0027] Reference Figure 1- Figure 7 A high-transparency polypropylene raw material mixing machine includes a mixing machine reactor body 1. The mixing machine reactor body 1 includes an outer box 101 and an inner box 102. The inner box 102 is disposed inside the outer box 101. A box cover 103 is installed on the top of the outer box 101. Four L-shaped plates 2 are fixedly connected to the bottom of the box cover 103. The four L-shaped plates 2 are all fixedly connected to the same toothed ring 3. The toothed ring 3 is meshed with two gears 4. A motor 5 is fixedly connected to the top of the box cover 103. The output end of the motor 5 passes through the box cover 103 and is fixedly connected to a rotating shaft 6. A U-shaped plate 15 is sleeved on the rotating shaft 6. The rotating shaft 6 is rotatably connected to the U-shaped plate 15. Plate 15, U-shaped plate 15 is fixedly connected to the bottom of box cover 103. A fixing plate 7 is fixedly connected to the bottom outer wall of the rotating shaft 6. I-shaped wheels 701 are passed through both ends of the fixing plate 7. The I-shaped wheels 701 are rotatably connected to the fixing plate 7. Fixing mechanisms 8 are provided at the bottom of the two I-shaped wheels 701 and the bottom of the rotating shaft 6. A first drive rod 10 is provided at the bottom of the fixing mechanism 8 at the bottom of the rotating shaft 6. Two first spiral stirring paddles 11 are fixedly connected to the outer wall of the first drive rod 10. A second drive rod 12 is provided at the bottom of the fixing mechanism 8 at both ends. Two second spiral stirring paddles 13 are fixedly connected to the outer wall of the second drive rod 12. The spiral agitator performs better in terms of material concentration deviation and axial back-mixing coefficient. Due to the use of spiral agitator blades and the coordinated mixing of the first spiral agitator and the second drive rod, the first spiral agitator rotates to agitate the polypropylene raw material, while the second spiral agitator performs circular motion within the inner casing. The second spiral agitator also rotates simultaneously, assisting in mixing and reducing dead zones. This effectively solves the problem mentioned in the background section where most existing high-transparency polypropylene raw material mixers use turbine or anchor-type agitator blades, resulting in unsatisfactory mixing effects. During mixing, significant deviations in raw material concentration and high axial back-mixing coefficients can lead to inconsistencies in the optical, physical, and chemical properties of the final product, affecting its transparency. A high back-mixing coefficient also indicates poor material flow within the mixer, potentially increasing wear on the mixing blades, shortening equipment lifespan, and necessitating frequent blade replacements, thus increasing costs. Therefore, this process achieves superior mixing results, effectively improving mixing efficiency, reducing dead zones, enhancing mixing uniformity, lowering raw material concentration deviations and axial back-mixing coefficients, and ensuring equipment lifespan.
[0028] In this embodiment, the fixing mechanism 8 includes a circular plate 801. A square groove 802 is provided at the bottom of the circular plate 801. Two positioning rods 803 are provided in the square groove 802. The positioning rods 803 are fixedly connected to the circular plate 801. Two guide rods 804 are provided at both ends of the circular plate 801. Springs 805 are sleeved on the guide rods 804. The springs 805 are provided in the square groove 802. The two guide rods 804 at the same end are fixedly connected to the same square plate 806. Limiting rods 807 are fixedly connected to the two square plates 806 on the side that is close to each other. A lever is provided at the bottom of the square plate 806.
[0029] In this embodiment, two positioning holes 20 are provided at the top of the first drive rod 10 and the second drive rod 12. The positioning holes 20 are adapted to the positioning rod 803. When the positioning rod 803 is inserted into the positioning hole 20, the lateral position of the second drive rod 12 can be limited.
[0030] In this embodiment, limit holes 9 are provided on both sides of the top end of the first drive rod 10 and the second drive rod 12. The limit holes 9 are adapted to the limit rod 807. When the limit rod 807 is inserted into the limit hole 9, the vertical position of the second drive rod 12 can be limited to ensure that the position of the second drive rod 12 is stable and will not fall or deviate during rotation.
[0031] In this embodiment, a plurality of heating plates 14 are installed on the inner wall of the outer casing 101. The heating plates 14 heat up to raise the temperature inside the inner casing 102. The heating plates 14 are in close contact with the outer wall of the inner casing 102.
[0032] In this embodiment, a thermostat 16 is installed on the outer wall of the outer casing 101. The temperature of the heating plate 14 is adjusted by the thermostat 16 to keep the temperature inside the inner casing 102 within the range of 77℃-79℃. The conversion rate of propylene is relatively high at 77℃-79℃. The thermostat 16 is electrically connected to the heating plate 14 through wires.
[0033] In this embodiment, the top of the box cover 103 is provided with a feed pipe 17 and a catalyst injection pipe 18. The catalyst is injected into the inner box 102 through the catalyst injection pipe 18. The catalyst injection amount is about 1000 g / mol·h. This range has a high yield and suitable polymer quality parameters, which can take into account transparency, mechanical properties and processing performance. The feed pipe 17 is provided with a sealing cap.
[0034] In this embodiment, a discharge pipe 19 is provided at the bottom of the main body 1 of the mixer reactor.
[0035] In this embodiment, a valve is provided on the discharge pipe 19.
[0036] Working principle: When using this device, polypropylene raw material is injected into the inner chamber 102 through the feed pipe 17. Then, the sealing cover is placed on the feed pipe 17. The motor 5 is started by connecting an external power source. The motor 5 drives the rotating shaft 6 to rotate, which in turn drives the fixing mechanism 8 at its bottom to rotate. At the same time, the rotating shaft 6 also drives the fixing plate 7 to rotate, which in turn drives the I-shaped wheel 701 to rotate. The I-shaped wheel 701 drives the gear 4 to rotate, which in turn drives the fixing mechanism 8 at its bottom to rotate. The rotation of the fixing mechanism 8 drives the circular plate 801 to rotate, and the positioning rod 803 drives the first drive rod 10 to rotate. The first drive rod 10 drives the first spiral stirring paddle 11 to rotate. The raw materials inside the inner chamber 102 are stirred. The rotation of the fixing mechanism 8 at the bottom of the rotating shaft 6 causes the first spiral stirring paddle 11 to rotate. The circular motion of the fixing mechanism 8 at the bottom of the I-shaped wheel 701 causes the second spiral stirring paddle 13 to rotate. At the same time, the gear 4 moves along the gear ring 3 and rotates while rotating. The gear 4 drives the fixing mechanism 8 at its bottom to rotate, which in turn causes the second drive rod 12 to rotate. This allows the second spiral stirring paddle 13 to rotate while moving, assisting in stirring and mixing, reducing dead zones in the stirring and mixing process, and improving the mixing effect and efficiency. During the mixing process, the temperature controller 16 and the air heating plate 14 heat the inner chamber 102. 2. Heating is performed to maintain the internal temperature of the inner chamber 102 within the range of 77℃-79℃. Simultaneously, catalyst is injected into the inner chamber 102 through the catalyst injection pipe 18. After mixing is complete, the valve of the discharge pipe 19 is opened to discharge the raw materials. After a period of use, the first spiral agitator 11 and the second spiral agitator 13 will wear out and need replacement. To replace them, the chamber cover 103 is removed, and the lever at the bottom of the square plate 806 is moved to move the two square plates 806 away from each other. This causes the square plates 806 to move and the spring 805 to contract. The movement of the square plates 806 also moves the limiting rod 807, causing the limiting rod 807 to move out of the limiting hole 9. The limiting positions on the second drive rod 12 and the first drive rod 10 can be released, allowing the first drive rod 10 and the second drive rod 12 to be removed and replaced. During installation, the lever at the bottom of the square plate 806 is moved away from each other. The positioning holes 20 on the first drive rod 10 and the second drive rod 12 are aligned with the positioning rod 803, and the first drive rod 10 and the second drive rod 12 are placed on the positioning rod 803. Then, the lever is released, and the spring 805 will extend, allowing the limiting rod 807 to move into the limiting hole 9, thus limiting the first drive rod 10 and the second drive rod 12. The first drive rod 10 and the second drive rod 12 are then installed, and the mixing operation can continue.
[0037] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A high-transparency polypropylene raw material mixer, comprising a mixer reactor body (1), characterized in that, The main body (1) of the mixing reactor includes an outer box (101) and an inner box (102). The inner box (102) is located inside the outer box (101). A box cover (103) is installed on the top of the outer box (101). Four L-shaped plates (2) are fixedly connected to the bottom of the box cover (103). The four L-shaped plates (2) are all fixedly connected to the same toothed ring (3). The toothed ring (3) meshes with two gears (4). A motor (5) is fixedly connected to the top of the box cover (103). The output end of the motor (5) passes through the box cover (103) and is fixedly connected to a rotating shaft (6). The rotating shaft (6) is fitted with a U-shaped plate (15). The rotating shaft (6) is rotatably connected to the U-shaped plate (15). 15) The bottom of the fixed connection box cover (103) is fixedly connected to the bottom outer wall of the rotating shaft (6), and a fixing plate (7) is fixedly connected to the bottom outer wall of the rotating shaft (6). Both ends of the fixing plate (7) are provided with I-shaped wheels (701). The I-shaped wheels (701) are rotatably connected to the fixing plate (7). The bottom of the two I-shaped wheels (701) and the bottom of the rotating shaft (6) are provided with fixing mechanisms (8). The bottom of the fixing mechanism (8) located at the bottom of the rotating shaft (6) is provided with a first drive rod (10). The outer wall of the first drive rod (10) is fixedly connected with two first spiral stirring paddles (11). The bottom of the fixing mechanism (8) located at both ends is provided with a second drive rod (12). The outer wall of the second drive rod (12) is fixedly connected with two second spiral stirring paddles (13).
2. The high-transparency polypropylene raw material mixer according to claim 1, characterized in that, The fixing mechanism (8) includes a circular plate (801), a square groove (802) is provided at the bottom of the circular plate (801), two positioning rods (803) are provided in the square groove (802), the positioning rods (803) are fixedly connected to the circular plate (801), two guide rods (804) are provided at both ends of the circular plate (801), springs (805) are sleeved on the guide rods (804), the springs (805) are provided in the square groove (802), the two guide rods (804) at the same end are fixedly connected to the same square plate (806), the two square plates (806) are fixedly connected to limit rods (807) on the side that is close to each other, and a lever is provided at the bottom of the square plate (806).
3. The high-transparency polypropylene raw material mixer according to claim 1, characterized in that, The top of the first drive rod (10) and the second drive rod (12) are provided with two positioning holes (20), which are adapted to the positioning rod (803).
4. The high-transparency polypropylene raw material mixer according to claim 3, characterized in that, Limiting holes (9) are provided on both sides of the top end of the first drive rod (10) and the second drive rod (12), and the limiting holes (9) are adapted to the limiting rod (807).
5. The high-transparency polypropylene raw material mixer according to claim 1, characterized in that, The inner wall of the outer casing (101) is equipped with several heating plates (14), which are in close contact with the outer wall of the inner casing (102).
6. The high-transparency polypropylene raw material mixer according to claim 5, characterized in that, A thermostat (16) is installed on the outer wall of the outer casing (101), and the thermostat (16) is electrically connected to the heating plate (14) via a wire.
7. The high-transparency polypropylene raw material mixer according to claim 1, characterized in that, The top of the box cover (103) is provided with a feed pipe (17) and a catalyst injection pipe (18), and the feed pipe (17) is provided with a sealing cap.
8. The high-transparency polypropylene raw material mixer according to claim 7, characterized in that, The bottom of the main body (1) of the mixer reactor is provided with a discharge pipe (19).
9. The high-transparency polypropylene raw material mixer according to claim 8, characterized in that, A valve is installed on the discharge pipe (19).