A mixing device for processing raw materials of rotomolded products

Abstract

The utility model discloses a kind of mixing devices for rotational moulding product raw material processing, including base and controller, the top of base is equipped with controller, the middle part of base is welded with mixing box, the top flange of mixing box is connected with access cover, the top of access cover is provided with feed hopper, the bottom of mixing box is provided with discharge pipe.This mixing device for rotational moulding product raw material processing is rotated by setting discharging mechanism, starting the first motor outside feed hopper to drive driving shaft and separate wheel, the blade of separate wheel periodically shields and opens feed hopper discharge port, can accurately control the time interval and flow size of raw material falling, avoid raw material to be in large quantities into mixing box once, make raw material enter in proper proportion and rhythm order, lay foundation for subsequent raw material uniform mixing, effectively improve the quality of rotational moulding product, also help to improve production efficiency, reduce the production of defective product and raw material waste caused by raw material mixing.

Description

Technical Field

[0001] This utility model relates to the field of rotational molding technology, specifically a mixing device for processing raw materials for rotational molding products. Background Technology

[0002] Rotational molding, also known as rotational casting, is a hollow molding method for thermoplastic plastics. The method involves first adding plastic raw material into a mold, then continuously rotating and heating the mold along two perpendicular axes. Under the influence of gravity and heat, the plastic raw material gradually and evenly coats, melts, and adheres to the entire surface of the mold cavity, forming the desired shape. After cooling and solidification, the finished product is formed. During the processing of rotationally molded products, multiple raw materials need to be mixed to ensure product quality. However, existing mixing devices still have certain problems in use: Traditional rotational molding raw material mixing devices often struggle to precisely control the flow rate and rhythm of raw materials during the feeding stage. This can easily lead to a large influx of raw materials into the mixing chamber at once, resulting in an imbalance in the mixing ratio and an inability to achieve uniform mixing. Consequently, this affects the performance and quality of the rotational molding products.

[0003] In view of this, in-depth research was conducted on the above issues, which led to the creation of this case.

[0004] To address the aforementioned issues, an innovative design was implemented based on the existing rotational molding raw material mixing device. Utility Model Content

[0005] The purpose of this utility model is to provide a mixing device for processing raw materials for rotational molding products, so as to solve the problem that in the feeding stage of the rotational molding raw material mixing device mentioned in the background art, it is often difficult to accurately control the flow rate and rhythm of the raw material, which easily leads to a large amount of raw material entering the mixing box at one time, resulting in an imbalance in the raw material mixing ratio, making it impossible to achieve uniform mixing, and thus affecting the performance and quality of rotational molding products.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A mixing device for processing raw materials for rotational molding products includes a base and a controller. The controller is mounted on top of the base, and a mixing chamber is welded to the middle of the base. A maintenance cover is connected to the top flange of the mixing chamber. A feed hopper is provided above the maintenance cover, and a discharge pipe is provided at the bottom of the mixing chamber. A valve is installed in the middle of the discharge pipe. A feeding mechanism is installed in the middle of the feed hopper. A second motor is bolted to the upper end face of the maintenance cover. A stirring shaft is movably connected to the output end of the second motor. A first stirring paddle is mounted on the outer surface of the stirring shaft, and a second stirring paddle is mounted on the bottom end of the stirring shaft. A second bearing is installed at the bottom of the mixing chamber, and the end of the stirring shaft extends into the interior of the mixing chamber and is rotatably connected to the middle of the second bearing.

[0007] Using the above technical solution, the stirring shaft is driven to rotate by the second motor, which in turn drives the first and second stirring paddles to rotate in the mixing box. At the same time, the feeding mechanism of the feeding hopper controls the raw materials to enter the mixing box, so as to achieve uniform mixing of the raw materials for rotational molding products, providing the required raw materials for subsequent processing. The discharge pipe and valve facilitate the control of the discharge of the mixed raw materials.

[0008] Preferably, the feeding mechanism includes a first motor bolted to the outside of the feeding hopper, a drive shaft movably connected to the output end of the first motor, a separator wheel fixed to the outer surface of the drive shaft, a first bearing installed on the other side of the feeding hopper, and the end of the drive shaft rotatably connected to the middle of the first bearing.

[0009] Using the above technical solution, the first motor drives the drive shaft to rotate, and the partition wheel fixed on the drive shaft rotates accordingly. The rotation of the partition wheel controls the amount of raw material falling into the feed hopper, and precisely adjusts the speed and flow of raw material entering the mixing box, ensuring that the raw material is fed in the appropriate proportion and rhythm, thereby improving the mixing effect and product quality.

[0010] Preferably, the separator wheel consists of a plurality of blades extending radially along the central axis.

[0011] By adopting the above technical solution, when the separator wheel rotates, its blades periodically block and open the discharge port of the feed hopper. By controlling the rotation interval and speed of the blades, the timing and flow rate of the raw material falling can be adjusted, so as to achieve precise control of the raw material feeding process, avoid the raw material falling in large quantities at one time, ensure that the raw material enters the mixing device as needed and evenly, and improve the mixing uniformity.

[0012] Preferably, the first impeller is a propeller structure and the second impeller is a turbine structure.

[0013] Using the above technical solution, the first agitator of the propeller structure generates axial thrust when it rotates, causing the material to tumble up and down in the mixing box; the second agitator of the turbine structure rotates to form radial and tangential flow, enhancing the lateral mixing of the material. The two agitators with different structures work together to agitate the material from different directions, which can achieve all-round, high-efficiency, and uniform mixing of raw materials and improve the quality of rotational molding products.

[0014] Preferably, two sets of rubber scrapers are fixed to the end of the stirring shaft, and the bottom of the scrapers is in close contact with the inner bottom of the mixing box.

[0015] Using the above technical solution, the rotation of the stirring shaft drives the two sets of rubber scrapers to rotate synchronously. By utilizing the close contact between the bottom of the scraper and the bottom of the mixing box, a scraping force is generated on the material at the bottom of the box during the rotation process, which effectively prevents the material from settling and clumping at the bottom of the mixing box, ensuring that the material at the bottom of the box can fully participate in the mixing process, improving the uniformity of raw material mixing and the discharge rate. During the discharge process, the scraper can smoothly push the material to the discharge pipe, which facilitates the discharge operation.

[0016] Preferably, a heating jacket is fixed inside the mixing chamber, and several heating coils are sleeved between the heating jacket and the mixing chamber. A temperature sensor is installed inside the inspection cover.

[0017] Using the above technical solution, the heating coil generates heat when energized, and the heat is evenly transferred to the raw materials in the mixing chamber through the heating jacket; the temperature sensor monitors the temperature inside the chamber in real time and feeds back the data, so as to realize the heating and precise temperature control of the raw materials in the mixing chamber, meet the temperature requirements of different rotational molding raw materials, and ensure the stability of raw material mixing effect and product quality.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the mixing device for processing raw materials for rotational molding products, 1. By setting up a feeding mechanism, the first motor on the outside of the feeding hopper drives the drive shaft and the separator wheel to rotate. The blades of the separator wheel periodically block and open the feeding hopper outlet, which can accurately control the time interval and flow rate of the raw material falling. This avoids a large amount of raw material entering the mixing box at one time, and allows the raw material to enter in an orderly manner in a proper proportion and rhythm. This lays the foundation for uniform mixing of subsequent raw materials, effectively improving the quality of rotational molding products. At the same time, it also helps to improve production efficiency and reduce the generation of defective products and waste of raw materials due to uneven mixing of raw materials. 2. The stirring shaft is driven to rotate by the second motor. The propeller structure of the first stirring paddle generates axial thrust to make the material tumble up and down. The turbine structure of the second stirring paddle forms radial and tangential flow. The two work together to achieve efficient mixing of materials in all directions. At the same time, the rubber scraper at the end of the stirring shaft fits tightly against the bottom of the mixing box. When rotating, it can effectively scrape off the material deposited and adhered at the bottom of the box to prevent clumping. It ensures that the material at the bottom of the box fully participates in the mixing, improves the uniformity of raw material mixing and the output rate, thereby improving the quality of rotational molding products. Moreover, it can smoothly push the material to the discharge pipe during discharge, which facilitates the discharge operation. 3. By setting up a heating jacket and heating coil inside the mixing chamber, the heating coil generates heat based on the current heating effect after being powered on. The heat is then evenly transferred to the raw materials inside the chamber through the heating jacket, which can meet the specific temperature requirements of different rotational molding raw materials. At the same time, the temperature sensor installed inside the inspection cover can sense the raw material temperature in real time and provide feedback, which facilitates precise control of the working status of the heating coil, achieves precise control of the raw material heating temperature, effectively ensures the mixing effect of the raw materials, improves the quality stability of subsequent rotational molding products, and reduces product defects caused by improper temperature. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the main body of this utility model; Figure 2 This is a schematic cross-sectional view of the main body of this utility model; Figure 3 This is a schematic diagram of the material feeding structure of this utility model; Figure 4 This is a schematic diagram of the stirring structure of this utility model; Figure 5 This is a schematic diagram of the scraping structure of this utility model; Figure 6 This is a schematic diagram of the heating structure of this utility model.

[0020] In the diagram: 1. Base; 2. Controller; 3. Mixing tank; 4. Inspection cover; 5. Feed hopper; 6. Discharge pipe; 7. Valve; 8. Feeding mechanism; 801. First motor; 802. Drive shaft; 803. Separator wheel; 9. First bearing; 10. Second motor; 11. Stirring shaft; 12. First stirring paddle; 13. Second stirring paddle; 14. Second bearing; 15. Scraper; 16. Heating jacket; 17. Heating coil; 18. Temperature sensor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0022] Please see Figures 1-3 This utility model provides a technical solution: A mixing device for processing raw materials for rotational molding products includes a base 1 and a controller 2. The controller 2 is mounted on top of the base 1. A mixing tank 3 is welded to the middle of the base 1. A maintenance cover 4 is connected to the top flange of the mixing tank 3. A feed hopper 5 is provided above the maintenance cover 4. A discharge pipe 6 is provided at the bottom of the mixing tank 3. A valve 7 is installed in the middle of the discharge pipe 6. A feeding mechanism 8 is installed in the middle of the feed hopper 5. The feeding mechanism 8 includes a first motor 801 bolted to the outside of the feed hopper 5. A drive shaft 802 is movably connected to the output end of the first motor 801. A separator wheel 803 is fixed to the outer surface of the drive shaft 802. A first bearing 9 is mounted on the other side of the feed hopper 5, and the end of the drive shaft 802 is rotatably connected to the middle of the first bearing 9. The separator wheel 803 consists of several blades extending radially along the central axis.

[0023] This mixing device for processing raw materials for rotational molding products operates as follows: When raw materials need to be added to the mixing tank 3, the first motor 801, bolted to the outside of the feed hopper 5, is activated. The first motor 801 drives the drive shaft 802, which is movably connected to its output end, to rotate. Since the other end of the drive shaft 802 is rotatably connected to the middle of the first bearing 9 mounted on the other side of the feed hopper 5, the stability of the drive shaft 802's rotation is ensured. When the drive shaft 802 rotates, the separator wheel 803 fixed to its outer surface rotates synchronously. The separator wheel 803 consists of several blades extending radially along the central axis. During rotation, these blades periodically... The material outlet of the open feed hopper 5 is blocked by a ground shield; when the blade rotates to the outlet position, it will block the material from falling; when the blade rotates away from the outlet, the material can fall into the mixing box 3 below through the outlet; by controlling the speed of the first motor 801, the rotation speed of the separator wheel 803 can be adjusted, thereby precisely controlling the time interval and flow rate of the falling material; this avoids a large amount of material from rushing into the mixing box 3 at once, so that the material can enter the mixing box 3 in an orderly manner according to a suitable proportion and rhythm, laying a good foundation for the uniform mixing of the material in the mixing box 3, and helping to improve the quality and production efficiency of rotational molding products. Example

[0024] Please see Figure 2 , Figure 4 , Figure 5 This utility model provides a technical solution: A second motor 10 is bolted to the upper end of the inspection cover 4. A stirring shaft 11 is movably connected to the output end of the second motor 10. A first stirring paddle 12 is mounted on the outer surface of the stirring shaft 11, and a second stirring paddle 13 is mounted on the bottom end of the stirring shaft 11. A second bearing 14 is mounted on the bottom of the mixing chamber 3, and the end of the stirring shaft 11 extends into the interior of the mixing chamber 3 and is rotatably connected to the middle of the second bearing 14. The first stirring paddle 12 is a propeller structure, and the second stirring paddle 13 is a turbine structure. Two sets of rubber scrapers 15 are fixed to the end of the stirring shaft 11, and the bottom of the scrapers 15 is tightly fitted to the inner bottom of the mixing chamber 3.

[0025] In this mixing device for processing raw materials for rotational molding products, the second motor 10, bolted to the upper end of the inspection cover 4, starts, and its output drives the movable stirring shaft 11 to rotate. Since the end of the stirring shaft 11 extends into the mixing chamber 3 and is rotatably connected to the middle of the second bearing 14 installed at the bottom, the stability of the stirring shaft 11's rotation is ensured. When the stirring shaft 11 rotates, the first stirring blade 12, whose outer surface has a propeller structure, rotates accordingly, generating axial thrust that causes the material to tumble up and down within the mixing chamber 3. Simultaneously, the second stirring blade 13, whose bottom end has a turbine structure, rotates... The material flows radially and tangentially, enhancing lateral mixing. The two work together to achieve all-round mixing of the material. In addition, the two sets of rubber scrapers 15 fixed at the end of the mixing shaft 11 are in close contact with the bottom of the mixing box 3. During rotation, they can effectively scrape off the material deposited and adhered at the bottom of the box, prevent material from clumping, ensure that the material at the bottom of the box fully participates in the mixing, improve the uniformity of raw material mixing and the discharge rate, thereby improving the quality of rotational molding products. During the discharge process, the scraper 15 can smoothly push the material to the discharge pipe 6, and the valve 7 facilitates the discharge operation. Example

[0026] Please see Figure 1 , Figure 6 This utility model provides a technical solution: A heating jacket 16 is fixed inside the mixing chamber 3, and several turns of heating coil 17 are sleeved between the heating jacket 16 and the mixing chamber 3. A temperature sensor 18 is installed inside the inspection cover 4.

[0027] In this mixing device for processing raw materials for rotational molding products, when the raw materials for rotational molding products in the mixing chamber 3 need to be heated, several heating coils 17, which are fitted between the heating sleeve 16 and the mixing chamber 3, are energized. Based on the principle of the thermal effect of electric current, the heating coils 17 generate heat. This heat is evenly transferred to the raw materials in the mixing chamber 3 through the heating sleeve 16, causing the raw material temperature to rise. At the same time, the temperature sensor 18 installed inside the inspection cover 4 will sense the temperature of the raw materials in the mixing chamber 3 in real time and feed the temperature data back to the controller 2 so as to accurately control the working state of the heating coils 17, thereby achieving precise control of the heating temperature of the raw materials, meeting the specific temperature requirements of different rotational molding raw material processing, and ensuring the mixing effect of the raw materials and the stable quality of the subsequent rotational molding products.

[0028] Working principle: When this utility model is in use, the first motor 801 on the outside of the feeding hopper 5 is started when material needs to be fed. It drives the drive shaft 802 to rotate, and the partition wheel 803 on the drive shaft 802 rotates synchronously. The blades of the partition wheel 803 periodically block and open the discharge port of the feeding hopper 5. The speed of the first motor 801 can be controlled to adjust the time interval and flow rate of the raw material falling. The second motor 10 on the maintenance cover 4 is started to drive the stirring shaft 11 to rotate. The first stirring paddle 12 and the second stirring paddle 13 on the stirring shaft 11 cooperate to achieve all-round stirring of the material. The rubber scraper 15 at the end of the stirring shaft 11 scrapes off the material at the bottom of the box. When the raw material needs to be heated, the heating coil 17 between the heating sleeve 16 and the mixing box 3 is energized and heats up. The heat is transferred to the raw material through the heating sleeve 16. The temperature sensor 18 inside the maintenance cover 4 senses the temperature in real time and feeds it back to the controller 2 to accurately control the working status of the heating coil 17.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mixing device for processing raw materials for rotational molding products, comprising a base (1) and a controller (2), characterized in that: A controller (2) is installed above the base (1). A mixing box (3) is welded to the middle of the base (1). A maintenance cover (4) is connected to the top flange of the mixing box (3). A feed hopper (5) is provided above the maintenance cover (4). A discharge pipe (6) is provided at the bottom of the mixing box (3). A valve (7) is installed in the middle of the discharge pipe (6). A feeding mechanism (8) is installed in the middle of the feed hopper (5). A second motor (10) is bolted to the upper end face of the maintenance cover (4). A stirring shaft (11) is movably connected to the output end of the second motor (10). A first stirring paddle (12) is installed on the outer surface of the stirring shaft (11). A second stirring paddle (13) is installed at the bottom end of the stirring shaft (11). A second bearing (14) is installed at the bottom of the mixing box (3). The end of the stirring shaft (11) extends into the mixing box (3) and is rotatably connected to the middle of the second bearing (14).

2. The mixing device for processing raw materials for rotational molding products according to claim 1, characterized in that: The feeding mechanism (8) includes a first motor (801) bolted to the outside of the feeding hopper (5), a drive shaft (802) movably connected to the output end of the first motor (801), a separator wheel (803) fixed on the outer surface of the drive shaft (802), a first bearing (9) installed on the other side of the feeding hopper (5), and the end of the drive shaft (802) rotatably connected to the middle of the first bearing (9).

3. The mixing device for processing raw materials for rotational molding products according to claim 2, characterized in that: The separator wheel (803) consists of several blades extending radially along the central axis.

4. The mixing device for processing raw materials for rotational molding products according to claim 1, characterized in that: The first stirring paddle (12) adopts a propeller structure, and the second stirring paddle (13) adopts a turbine structure.

5. The mixing device for processing raw materials for rotational molding products according to claim 1, characterized in that: Two sets of rubber scrapers (15) are fixed at the end of the stirring shaft (11), and the bottom of the scraper (15) is in close contact with the bottom of the mixing box (3).

6. The mixing device for processing raw materials for rotational molding products according to claim 1, characterized in that: A heating jacket (16) is fixed inside the mixing box (3), and several heating coils (17) are sleeved between the heating jacket (16) and the mixing box (3). A temperature sensor (18) is installed inside the inspection cover (4).

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