A talc powder addition device for modified polypropylene processing
By designing components such as the filter screen and stirring tube of the talc powder addition device for modified polypropylene processing, the problems of talc powder agglomeration and uneven coating of coupling agent were solved, achieving uniform dispersion of talc powder and efficient coating of coupling agent, thus improving the production quality of modified polypropylene materials.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU SIDA PLASTIC IND CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-31
AI Technical Summary
Existing equipment cannot effectively solve the problem that talc powder is prone to moisture absorption and agglomeration during storage and feeding due to its small particle size, large specific surface area, and high surface energy, and it cannot achieve the staged dripping of coupling agent, resulting in insufficient coating rate.
The design incorporates a combination of components such as a filter screen, stirring tube, crushing blade, nozzle, heater, one-way bearing, and vibration motor. Through mechanical shearing, heating, vibration, and precise addition of coupling agent, it ensures uniform dispersion of talc powder and uniform coating of coupling agent.
This method achieves uniform dispersion of talc powder and efficient coating of coupling agent, improving the production quality and coupling effect of modified polypropylene materials and solving the problems of agglomeration and uneven coating in traditional equipment.
Smart Images
Figure CN224575935U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of modified polypropylene materials technology, specifically to a talc powder addition device for modified polypropylene processing. Background Technology
[0002] Talc, as a core filler for modified polypropylene (PP), can significantly improve the material's rigidity, heat resistance, and dimensional stability. In traditional production processes, talc needs to undergo surface activation treatment (such as coupling agent coating) to improve its interfacial compatibility with polypropylene.
[0003] An existing patent (publication number: CN218398947U) discloses a talc powder adding device for modified polypropylene processing, including a mixing tank. A feeding hopper is fixedly installed on the top of one side of the mixing tank. A rotating mechanism is provided in the inner cavity of the feeding hopper. The rotating mechanism includes a rotating rod. Bearings are fixedly connected to both the front and back of the feeding hopper. A fixing plate is fixedly connected to the top of the outer wall of the rotating rod. An arc-shaped block is fixedly connected to one end of the fixing plate. A limit mechanism is provided at one end of the rotating rod. This utility model adds talc powder to the mixing tank through the feeding hopper. The talc powder falls downwards along the inner cavity of the feeding hopper, rotating the rotating rod and causing the fixing plate to rotate in the inner cavity of the feeding hopper. This causes one end of the arc-shaped block to penetrate into the talc powder, and the outer wall of the fixing plate contacts the talc powder, turning the talc powder and preventing blockage, thus facilitating the addition of talc powder.
[0004] Talc powder, due to its small particle size, large specific surface area, and high surface energy, is prone to absorbing moisture and agglomerating during storage and feeding, forming lumps. Existing devices, such as the patent with publication number CN218398947U, alleviate clogging by using a rotating mechanism (arc-shaped block and fixed plate) inside the feed hopper to agitate the talc powder, but this only solves the problem of instantaneous flowability during feeding and cannot eliminate the root cause of the powder's agglomeration.
[0005] Secondly, talc powder contains hydrophilic groups on its surface, which need to be modified by coupling agents (such as silanes and titanates) to achieve hydrophobicity. The above-mentioned device cannot achieve the staged addition of coupling agents. Furthermore, when agglomerated talc powder is mixed with coupling agents, the coupling agents can only cover the surface of the agglomerates and cannot penetrate into the internal particles, resulting in insufficient coating rate. Utility Model Content
[0006] To address the shortcomings of existing technologies, this application provides a talc powder addition device for modified polypropylene processing, which has advantages such as uniform coating and solves the problems mentioned in the background technology.
[0007] To achieve the above objectives, this application provides the following technical solution: a talc powder addition device for modified polypropylene processing, comprising an addition tank and a coupling tank, wherein a filter screen is fixedly connected to the top of the inner wall of the addition tank, and a stirring tube is rotatably connected to the top inner wall of the addition tank, the stirring tube extends to the bottom of the filter screen and is rotatably connected to the filter screen, and a set of mixing blades is fixedly connected to the outer surface of the stirring tube, the set of mixing blades being located below the filter screen.
[0008] A set of crushing blades is fixedly connected to the top of the outer surface of the stirring tube. The set of crushing blades is located above the filter screen. A feed pipe is fixedly connected to the outer surface of the addition tank. The feed pipe is located above the filter screen.
[0009] A set of circumferentially arranged nozzles is fixedly connected to the outer surface of the stirring tube, and the set of nozzles is located below the filter screen.
[0010] Furthermore, a protective shell is fixedly connected to the outer surface of the addition tank, and a heater is installed between the inner wall of the protective shell and the addition tank.
[0011] The above scheme uses a resistance heating ring or an infrared radiation heating device as the heater. By setting up the heater, the material in the addition tank can be preheated, which on the one hand reduces the moisture content of talc to reduce agglomeration, and on the other hand promotes the chemical bonding reaction between the coupling agent and the surface of talc, thereby improving the activation efficiency.
[0012] Furthermore, the bottom end of the addition tank is fixedly connected to a discharge pipe, and the bottom end of the stirring shaft is rotatably connected to a discharge shaft through a one-way bearing. An auger plate is fixedly connected to the outer surface of the discharge shaft. The auger plate is located inside the discharge pipe, and its edge abuts against the inner wall of the discharge pipe.
[0013] With the above scheme, the mixing blades are driven to work when the stirring shaft rotates forward, and the auger blades are driven to rotate through the discharge shaft when the shaft rotates in reverse, so as to realize the active propulsion of the discharge process. The edge of the auger blades abuts against the inner wall of the discharge pipe to prevent material residue. At the same time, the one-way bearing avoids interference between the stirring and discharge actions, ensuring that the mixing and discharge are carried out in stages and efficiently.
[0014] Furthermore, valves are installed at the bottom of the discharge pipe and the top of the feed pipe.
[0015] The above method facilitates the addition and removal of talc powder.
[0016] Furthermore, the coupling tank is fixedly connected to the addition tank, and a metering pump is installed above the coupling tank. The output end of the metering pump is fixedly connected to the coupling tank, and a delivery pipe is fixedly connected to the output end of the metering pump. A rotary joint is installed between the top end of the delivery pipe and the stirring pipe.
[0017] With the above scheme, the metering pump can accurately control the amount of coupling agent added. The delivery pipe is connected to the top of the mixing pipe through a rotary joint. Compared with the traditional dripping onto the surface of talc powder, the coupling agent can be directly injected into the rotating mixing pipe and then efficiently mixed with talc powder through the nozzle, avoiding the problem of uneven local concentration caused by traditional static mixing.
[0018] Furthermore, a vibration motor is fixedly installed on the outer surface of the addition tank.
[0019] The above solution, through the setting of the vibration motor, can generate high-frequency low-amplitude vibration, which is transmitted to the filter screen to promote the uniform feeding of talc powder and avoid filter screen clogging.
[0020] Furthermore, a motor is fixedly installed on the upper surface of the addition tank, and a power shaft is fixedly connected to the output end of the motor. A bevel gear is fixedly connected to the other end of the power shaft and the top end of the stirring tube, and the two bevel gears are meshed together.
[0021] With the above scheme, the motor power is transmitted to the bevel gear pair through the power shaft, driving the stirring tube to rotate.
[0022] Furthermore, a flange is installed at the bottom of the addition tank.
[0023] The above solution allows for quick connection to the feed inlet or mixing equipment of a modified polypropylene production line.
[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0025] This device for adding talc powder in the processing of modified polypropylene uses a crushing blade above the filter screen to mechanically shear clumps of talc powder during rotation. Combined with high-frequency, low-amplitude vibration generated by a vibrating motor, it prevents the filter screen from clogging and disperses large particles into smaller units that fall through the filter screen, ensuring the production quality of the modified polypropylene and the coating effect of the coupling agent.
[0026] The nozzles arranged in a circle at the bottom of the stirring tube rotate with the tube body, spraying the coupling agent evenly into the talc powder flow field below the filter screen. Compared with the traditional static dripping method, the centrifugal force generated by the rotating spray is used for diffusion. Combined with the stirring of the mixing blades, it can effectively shorten the mixing time and improve the uniformity of coating.
[0027] One-way bearing enables independent control of the mixing shaft's forward rotation for mixing and reverse rotation for discharging: during the mixing stage, the auger blades remain stationary to prevent material from being discharged prematurely; during the discharging stage, the edges of the auger blades are tightly fitted to the pipe wall, and the activated talc powder is actively transported to external equipment through spiral propulsion, solving the residue problem of traditional gravity discharge.
[0028] The combination design of metering pump and rotary joint can automatically add coupling agent according to the segmented addition requirements and amount, further improving its coating uniformity and effect. Attached Figure Description
[0029] Figure 1 This is a perspective view of the overall structural cross-section of this application;
[0030] Figure 2 This is a cross-sectional view of the overall structure of this application;
[0031] Figure 3 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 1 ;
[0032] Figure 4 This is a three-dimensional schematic diagram of the overall structure of this application. Figure 2 .
[0033] In the picture:
[0034] 1. Addition tank; 2. Coupling tank; 3. Filter screen; 4. Stirring tube; 5. Mixing blade; 6. Crushing blade; 7. Feed pipe; 8. Nozzle; 9. Protective shell; 10. Heater; 11. Discharge pipe; 12. Discharge shaft; 13. Screwdriver blade; 14. Valve; 15. Metering pump; 16. Conveying pipe; 17. Rotary joint; 18. Vibration motor; 19. Motor; 20. Power shaft; 21. Bevel gear; 22. Flange. Detailed Implementation
[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0036] Please see Figures 1-4 This embodiment of a talc powder addition device for modified polypropylene processing includes an addition tank 1 and a coupling tank 2. A filter screen 3 is fixedly connected to the top of the inner wall of the addition tank 1. A stirring tube 4 is rotatably connected to the top inner wall of the addition tank 1. The stirring tube 4 extends to the bottom of the filter screen 3 and is rotatably connected to the filter screen 3. A set of mixing blades 5 is fixedly connected to the outer surface of the stirring tube 4. The set of mixing blades 5 is located below the filter screen 3. A set of crushing blades 6 is fixedly connected to the top of the outer surface of the stirring tube 4. The set of crushing blades 6 is located above the filter screen 3. A feed pipe 7 is fixedly connected to the outer surface of the addition tank 1. The feed pipe 7 is located above the filter screen 3.
[0037] A set of circumferentially arranged nozzles 8 are fixedly connected to the outer surface of the stirring tube 4. These nozzles 8 are located below the filter screen 3. This arrangement enables the mixing of talc powder and coupling agent. Specifically, the nozzles 8 are arranged circumferentially along the stirring tube 4 and spray the coupling agent towards the area below the filter screen 3. During the rotation of the stirring tube 4, the coupling agent is evenly dispersed into the talc powder. Combined with the shearing action of the mixing blades 5, the coupling agent fully contacts and coats the talc powder particles. Simultaneously, the breaking blades 6 pre-disperse the agglomerated talc powder above the filter screen 3, preventing large particles from directly entering the mixing zone and affecting the coating effect. The bottom of the addition tank 1... A discharge pipe 11 is fixedly connected to the bottom of the stirring shaft, and a discharge shaft 12 is rotatably connected to the bottom of the stirring shaft via a one-way bearing. An auger blade 13 is fixedly connected to the outer surface of the discharge shaft 12. The auger blade 13 is located inside the discharge pipe 11, and its edge abuts against the inner wall of the discharge pipe 11. With the setting of the one-way bearing, the stirring shaft drives the mixing blade 5 to work when rotating forward, and can drive the auger blade 13 to rotate through the discharge shaft 12 when rotating in reverse, so as to realize the active propulsion of the discharge process. The edge of the auger blade 13 abuts against the inner wall of the discharge pipe 11 to prevent material residue. At the same time, the one-way bearing avoids interference between stirring and discharge actions, ensuring that mixing and discharge are carried out in stages and efficiently.
[0038] Valves 14 are installed at the bottom of the discharge pipe 11 and the top of the feed pipe 7 to facilitate the addition and discharge of talc powder. The coupling tank 2 is fixedly connected to the addition tank 1. A metering pump 15 is installed above the coupling tank 2. The output end of the metering pump 15 is fixedly connected to the coupling tank 2. The output end of the metering pump 15 is fixedly connected to the delivery pipe 16. A rotary joint 17 is installed between the delivery pipe 16 and the top of the stirring pipe 4. The metering pump 15 can accurately control the amount of coupling agent added. The delivery pipe 16 is connected to the top of the stirring pipe 4 through the rotary joint 17. Compared with the traditional dripping onto the surface of the talc powder accumulation, the coupling agent can be directly injected into the rotating stirring pipe 4 and then efficiently mixed with the talc powder after passing through the nozzle 8, avoiding the problem of uneven local concentration caused by traditional static mixing.
[0039] A protective shell 9 is fixedly connected to the outer surface of the addition tank 1. A heater 10 is installed between the inner wall of the protective shell 9 and the addition tank 1. The heater 10 is a resistance heating ring or an infrared radiation heating device. By setting the heater 10, the material in the addition tank 1 can be preheated, which on the one hand reduces the moisture content of talc powder to reduce agglomeration, and on the other hand promotes the chemical bonding reaction between the coupling agent and the surface of talc powder, thereby improving the activation efficiency. A vibration motor 18 is fixedly installed on the outer surface of the addition tank 1. By setting the vibration motor 18, high-frequency low-amplitude vibration can be generated. The talc powder is transferred to the filter screen 3 to promote uniform feeding and avoid clogging of the filter screen 3. A motor 19 is fixedly installed on the upper surface of the addition tank 1. The output end of the motor 19 is fixedly connected to the power shaft 20. The other end of the power shaft 20 and the top end of the stirring tube 4 are both fixedly connected to the bevel gear 21. The two bevel gears 21 are meshed and connected. The power of the motor 19 is transmitted to the bevel gear 21 through the power shaft 20 to drive the stirring tube 4 to rotate. A flange 22 is installed at the bottom end of the addition tank 1, which can be quickly connected to the feed port of the modified polypropylene production line or the mixing equipment.
[0040] The working principle of the above embodiment is as follows: Talc powder is injected into the addition tank 1 through the feed pipe 7, located above the filter screen 3. The vibration motor 18 on the outer wall of the addition tank 1 is started, generating high-frequency low-amplitude vibration, which is transmitted to the filter screen 3 to promote uniform feeding of talc powder and avoid clogging of the filter screen 3. The motor 19 drives the power shaft 20 to rotate, which drives the stirring tube 4 to rotate through the bevel gear 21 pair. The crushing blades 6 at the top of the stirring tube 4 rotate above the filter screen 3, mechanically shearing the talc powder clumps and dispersing large particles into fine units. The coupling agent in the coupling tank 2 is precisely controlled by the metering pump 15 and injected into the rotating stirring tube 4 through the conveying pipe 16 and the rotary joint 17. The nozzle 8 at the bottom of the stirring tube 4 rotates with the tube body, uniformly spraying the coupling agent into the talc powder flow field below the filter screen 3. The mixing blades 5 on the outer wall of the stirring tube 4 under the filter screen 3 The mixing tank rotates at high speed to mix talc powder and coupling agent. The heater 10 inside the protective shell 9 preheats the material in the addition tank 1, reducing the moisture content of the talc powder and increasing the temperature to accelerate the chemical bonding reaction between the coupling agent and the surface of the talc powder. The mixing blade 5 continuously stirs to ensure that the coupling agent is evenly distributed and penetrates into the gaps between the talc powder particles, improving the coating rate. The valve 14 of the feed pipe 7 is closed to complete the full mixing and activation of talc powder and coupling agent. The motor 19 drives the stirring shaft to reverse, which drives the discharge shaft 12 to rotate through the one-way bearing. The auger blades 13 on the outer wall of the discharge shaft 12 spirally propel the activated talc powder in the discharge pipe 11. The flange 22 at the bottom of the addition tank 1 is quickly connected to the feed port of the modified polypropylene production line or the mixing equipment to achieve continuous production. The amount of coupling agent added is precisely controlled by the metering pump 15.
[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0042] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A talc powder addition device for modified polypropylene processing, comprising an addition tank (1) and a coupling tank (2), characterized in that: A filter screen (3) is fixedly connected to the top of the inner wall of the addition tank (1), and a stirring tube (4) is rotatably connected to the top inner wall of the addition tank (1). The stirring tube (4) extends to the bottom of the filter screen (3) and is rotatably connected to the filter screen (3). A set of mixing blades (5) is fixedly connected to the outer surface of the stirring tube (4), and the set of mixing blades (5) is located below the filter screen (3). A set of crushing blades (6) is fixedly connected to the top of the outer surface of the stirring tube (4). The set of crushing blades (6) is located above the filter screen (3). The outer surface of the addition tank (1) is fixedly connected to the feed pipe (7), which is located above the filter screen (3). The outer surface of the stirring tube (4) is fixedly connected to a set of circumferentially arranged nozzles (8), and the set of nozzles (8) is located below the filter screen (3).
2. The talc powder addition device for modified polypropylene processing according to claim 1, characterized in that: A protective shell (9) is fixedly connected to the outer surface of the addition tank (1), and a heater (10) is installed between the inner wall of the protective shell (9) and the addition tank (1).
3. The talc powder addition device for modified polypropylene processing according to claim 1, characterized in that: The bottom end of the addition tank (1) is fixedly connected to the discharge pipe (11), and the bottom end of the stirring shaft is rotatably connected to the discharge shaft (12) through a one-way bearing. The outer surface of the discharge shaft (12) is fixedly connected to the auger plate (13), which is located inside the discharge pipe (11) and its edge abuts against the inner wall of the discharge pipe (11).
4. The talc powder addition device for modified polypropylene processing according to claim 3, characterized in that: Valves (14) are installed at the bottom of the discharge pipe (11) and the top of the feed pipe (7).
5. The talc powder addition device for modified polypropylene processing according to claim 1, characterized in that: The coupling tank (2) is fixedly connected to the addition tank (1). A metering pump (15) is installed above the coupling tank (2). The output end of the metering pump (15) is fixedly connected to the coupling tank (2). The output end of the metering pump (15) is fixedly connected to the delivery pipe (16). A rotary joint (17) is installed between the delivery pipe (16) and the top end of the stirring pipe (4).
6. The talc powder addition device for modified polypropylene processing according to claim 1, characterized in that: A vibration motor (18) is fixedly installed on the outer surface of the addition tank (1).
7. The talc powder addition device for modified polypropylene processing according to claim 1, characterized in that: A motor (19) is fixedly installed on the upper surface of the addition tank (1). A power shaft (20) is fixedly connected to the output end of the motor (19). A bevel gear (21) is fixedly connected to the other end of the power shaft (20) and the top end of the stirring tube (4). The two bevel gears (21) are meshed together.
8. The talc powder addition device for modified polypropylene processing according to claim 1, characterized in that: A flange (22) is installed at the bottom of the addition tank (1).