Plastic particle stirring tank with self-cleaning function
By designing bidirectional spiral mixing blades and a self-cleaning function, the problems of uneven mixing and cleaning difficulties in TPU shoe sole production have been solved, enabling efficient and continuous TPU granule mixing tank production and improving mixing uniformity and discharge efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional mixing tanks suffer from uneven mixing, significant residue, and low efficiency in TPU shoe sole production. In particular, the high viscosity of TPU particles leads to vortex effects and cleaning difficulties, affecting production quality and efficiency.
It adopts a bidirectional spiral stirring blade design, elastic scraper and lifting component combined with a self-weight flap valve to achieve integrated stirring and cleaning. Through bidirectional shearing force and dynamic scraping function, it ensures uniform mixing and automatic cleaning.
It significantly improves the uniformity of mixing TPU particles and additives, reduces residues by 90%, and increases output efficiency by 40%, achieving a highly efficient and continuous production process.
Smart Images
Figure CN224044229U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the sole injection production field, especially in a kind of plastic particle stirring tank with self-cleaning function. BACKGROUND
[0002] TPU (Thermoplastic Polyurethane) material is widely used in sole injection production due to its high elasticity, wear resistance and environmental protection characteristics. In the production process of TPU sole, plastic particles and additives need to be uniformly mixed before injection molding.
[0003] However, the traditional stirring tank has the following technical defects: 1. uneven mixing: TPU particles have high viscosity, and conventional one-way stirring is prone to "vortex effect", which causes the particles and additives to separate, affecting the material homogeneity; 2. serious residue: the inner wall of the tank and the stirring assembly are prone to adhere to the material, making it difficult to clean, and the residue affects the quality of the next batch of production, and manual cleaning is time-consuming and labor-intensive; 3. low efficiency: stirring and cleaning need to be operated in steps, which prolongs the equipment downtime and restricts continuous production. Therefore, there is an urgent need for a stirring device that combines efficient mixing, self-cleaning and intelligent monitoring functions to meet the high-quality and high-efficiency production requirements of TPU soles. SUMMARY
[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a plastic particle stirring tank with self-cleaning function.
[0005] To solve the above technical problems, the utility model provides the following technical scheme:
[0006] The utility model relates to a plastic particle stirring tank with self-cleaning function, comprising: a tank assembly, including a tank, a feed hopper at the top and a discharge port with a discharge valve at the bottom, and a transparent observation window embedded in the side wall;
[0007] A stirring assembly includes a motor fixed to the top of the tank;
[0008] A stirring shaft vertically penetrates the top of the tank and is coaxially connected to the output shaft of the motor;
[0009] The first stirring blade is spirally distributed along the axial direction of the stirring shaft, and the rotation direction is the first direction;
[0010] A stirring bracket is coaxially sleeved outside the stirring shaft;
[0011] The second stirring blade is fixed to the stirring bracket, and the rotation direction is opposite to that of the first stirring blade;
[0012] A scraper is hinged to the outer edge of the stirring bracket by a resilient hinge and is spaced along the axial direction of the stirring bracket;
[0013] Lifting assembly, including two drive cylinders, symmetrically fixed to the top of the tank body, whose piston rods extend downward into the tank body;
[0014] Mixing cylinder, annularly sleeved outside the stirring shaft, fixedly connected with the piston rods of the drive cylinders at the top, and provided with a self-weight flap valve at the bottom;
[0015] At least two groups of impeller discs, fixedly arranged in parallel on the outer wall of the mixing cylinder, the outer circumferences of the impeller discs are in sliding contact with the inner wall of the tank body, and the disc surfaces are uniformly provided with inclined blades in the circumferential direction.
[0016] As a preferred technical scheme of the utility model, the free end of the scraper is in contact with the inner wall of the mixing cylinder, and the elastic deformation angle range of the elastic hinge is 15°-45°; the helix angle difference between the first stirring blade and the second stirring blade is 20°-50°.
[0017] As a preferred technical scheme of the utility model, the self-weight flap valve comprises a valve seat and a flap, the flap is hingedly connected to the valve seat through a torsion spring, and is opened under the action of gravity when the mixing cylinder descends and is closed under the action of the torsion spring when the mixing cylinder ascends.
[0018] As a preferred technical scheme of the utility model, the included angle between the inclined blade of the impeller disc and the disc surface is 30°-60°, and the inclined directions of the blades of adjacent impeller discs are opposite.
[0019] As a preferred technical scheme of the utility model, the observation window is a double-layer tempered glass structure, the inner side surface is coated with a hydrophobic coating, and the outer edge is provided with a scale ruler.
[0020] As a preferred technical scheme of the utility model, the bottom of the tank body is a conical structure, the taper angle is 60°-90°, and the discharge port is located at the top of the cone.
[0021] Compared with the prior art, the utility model has the beneficial effects as follows:
[0022] 1. Bidirectional high-efficiency mixing: the first stirring blade (forward helix) and the second stirring blade (reverse helix) form bidirectional convection, break the traditional single-direction stirring "vortex effect", the helix angle difference (20°-50°) enhances the shear force, the TPU particles and the additives are fully penetrated, the mixing uniformity is improved by more than 30%, the stirring support and the stirring shaft are cooperatively rotated, the stirring range is expanded, and the material accumulation at the corners of the tank body is eliminated.
[0023] 2. Dynamic self-cleaning function: the elastic hinge scraper closely adheres to the inner wall of the mixing cylinder when rotating with the stirring support, and automatically cleans the adhered material. The elastic deformation angle (15°-45°) ensures stable scraping force and reduces residual material by 90%. The lifting assembly drives the impeller disc to move up and down, and the inclined blades (30°-60° reverse staggered) scrape the inner wall of the tank and form a vortex, synchronously cleaning the external area, realizing "stirring-cleaning" integration.
[0024] 3. The self-weight type flap valve is automatically opened and closed when the mixing cylinder is lifted, precisely controlling the material flow path to avoid blockage and cross contamination. The conical tank bottom (60°-90° cone angle) combined with the discharge valve ensures that the TPU mixture is quickly and completely discharged, improving the discharge efficiency by 40%. BRIEF DESCRIPTION OF DRAWINGS
[0025] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:
[0026] Figure 1 is a schematic diagram of the overall structure of the present application;
[0027] Figure 2 is a schematic diagram of the cross-sectional structure of the present application;
[0028] Figure 3 is a schematic diagram of the structure of the self-weight type flap valve in the present application;
[0029] Figure 4 is a schematic diagram of the structure of the stirring assembly in the present application;
[0030] In the drawings: 1, tank assembly; 2, stirring assembly; 3, lifting assembly; 11, tank; 12, feed hopper; 13, discharge port; 14, discharge valve; 15, observation window; 21, motor; 22, stirring shaft; 23, first stirring blade; 24, stirring support; 25, second stirring blade; 26, scraper; 27, elastic hinge; 31, drive cylinder; 32, mixing cylinder; 33, impeller disc; 34, self-weight type flap valve; 35, inclined blade; 341, valve seat; 342, flap; 343, torsion spring. DETAILED DESCRIPTION
[0031] The preferred embodiments of the present application are described below in conjunction with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and do not limit the present application.
[0032] The same reference numerals in the drawings all refer to the same components.
[0033] As Figures 1-4As shown, the utility model provides a kind of plastic particle stirring tank with self-cleaning function, including following core structure:
[0034] 1, tank structure: tank 11 top is equipped with feed hopper 12, for input TPU particle and additive;Tank 11 bottom is conical structure, and the taper angle is set as 60 °-90 °, and the top of cone is connected discharge port 13, and discharge port 13 installs discharge valve 14 to control material discharge.
[0035] Tank 11 side wall is embedded with transparent observation window 15 made of double-layer toughened glass, and the inside of observation window 15 is coated with hydrophobic coating, and the outer edge is marked with scale, for real-time monitoring material mixing state and liquid level height.
[0036] Stirring assembly 2: motor 21 is fixed on the top of tank 11, and the output shaft is coaxially connected with stirring shaft 22 vertically through the top of tank 11, to drive stirring shaft 22 to rotate.
[0037] First stirring blade 23 is spirally distributed on stirring shaft 22 along the axial direction, and the rotation direction is positive (for example, clockwise);Stirring support 24 is coaxially sleeved on the outside of stirring shaft 22, and second stirring blade 25 (for example, counterclockwise) with opposite rotation direction is fixed on stirring support 24, and the helix lift angle difference of the two blades is 20 °-50 °, to form bidirectional shear convection.
[0038] The outer edge of stirring support 24 is hinged with multiple scrapers 26 through elastic hinge 27, and the scrapers 26 are axially spaced along the stirring support 24, and the free end is close to the inner wall of mixing cylinder 32;The elastic deformation angle range of elastic hinge 27 is 15 °-45 °, to ensure that scraper 26 is adaptively attached to the inner wall and cleans residual TPU particles.
[0039] Lifting assembly 3: two drive cylinders 31 are symmetrically fixed on the top of tank 11, and the piston rod extends downward to the inside of tank 11, and is fixedly connected with the top of annular mixing cylinder 32.Mixing cylinder 32 is sleeved on the outside of stirring shaft 22, and moves up and down with drive cylinder 31.
[0040] At least two groups of impeller discs 33 are fixed on the outer wall of mixing cylinder 32 in parallel, and the outer circumference of impeller disc 33 is in sliding contact with the inner wall of tank 11;The disc surface of each impeller disc 33 is uniformly distributed with inclined blades 35, and the inclination angle is 30 °-60 °, and the inclination direction of the blades of adjacent impeller discs 33 is opposite, to scrape the tank wall and form vortex in the lifting process.
[0041] Mixing cylinder 32 bottom is equipped with self-weight flap valve 34, including valve seat 341 and flap 342 hinged through torsion spring 343;When mixing cylinder 32 descends, flap 342 is opened to discharge material under the action of gravity;When rising, torsion spring 343 forces flap 342 to close, to prevent material backflow.
[0042] The use mode of the utility model is as follows:
[0043] 1, feeding mixing: TPU granules enter the tank body 11 from the feeding hopper 12, the motor 21 drives the stirring shaft 22 to drive the first stirring blade 23 to rotate forward, and the stirring support 24 and the second stirring blade 25 rotate reversely, the bidirectional shearing force makes the material mix quickly and uniformly;
[0044] 2, dynamic cleaning: the driving cylinder 31 periodically lifts the mixing cylinder 32, the inclined blade 35 of the impeller disc 33 scrapes the inner wall of the tank body 11 and stirs the material, and the scraped material falls to the bottom of the tank body 11 from the gap between the inclined blade 35; the scraper 26 rotates with the stirring support 24, continuously cleaning the adhering material in the inner wall of the mixing cylinder 32;
[0045] 3, discharge control: after mixing, the discharge valve 14 is opened, the mixing cylinder 32 is lowered to open the self-weight flap valve 34, and the material is discharged through the discharge port 13; when the mixing cylinder 32 rises, the flap valve 34 is closed, and the residual material is completely removed by the scraper 26.
[0046] The utility model discloses a kind of plastic granule stirring tanks with self-cleaning function, through mechanical structure innovation and automation control, solve the problem of uneven mixing, low cleaning efficiency and material residue in TPU shoe sole production, significantly improve production quality and continuity.
[0047] Finally, it should be noted that: the above only for preferred embodiment of the utility model has described, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.
Claims
1. A plastic particle stirring tank with self-cleaning function, characterized in that, The application relates to a tank body assembly (1) comprising a tank body (11) provided with a feeding hopper (12) at the top and a discharging port (13) with a discharging valve (14) at the bottom, and a transparent observation window (15) embedded in the side wall; a stirring assembly (2) comprising a motor (21) fixed to the top of the tank body (11); a stirring shaft (22) vertically penetrating the top of the tank body (11) and coaxially connected with the output shaft of the motor (21); first stirring blades (23) spirally distributed along the axial direction of the stirring shaft (22) and having a first direction of rotation; a stirring support (24) coaxially sleeved outside the stirring shaft (22); second stirring blades (25) fixed to the stirring support (24) and having a direction of rotation opposite to that of the first stirring blades (23); scrapers (26) hingedly connected to the outer edge of the stirring support (24) through elastic hinges (27) and spacedly distributed along the axial direction of the stirring support (24); a lifting assembly (3) comprising two driving cylinders (31) symmetrically fixed to the top of the tank body (11) and having piston rods extending downward into the tank body (11); a mixing cylinder (32) annularly sleeved outside the stirring shaft (22) and fixedly connected with the piston rods of the driving cylinders (31) at the top and provided with a self-weight type flap valve (34) at the bottom; and at least two groups of impeller discs (33) fixedly arranged on the outer wall of the mixing cylinder (32) and having outer circumferences in sliding contact with the inner wall of the tank body (11) and disc surfaces uniformly provided with inclined blades (35) along the circumferential direction. The free end of the scraper (26) is in contact with the inner wall of the mixing cylinder (32), and the elastic deformation angle of the elastic hinge (27) ranges from 15 to 45 degrees; and the helix lift angle difference between the first stirring blades (23) and the second stirring blades (25) ranges from 20 to 50 degrees. The self-weight type flap valve (34) comprises a valve seat (341) and a flap (342), the flap (342) is hingedly connected to the valve seat (341) through a torsion spring (343) and is opened under the action of gravity when the mixing cylinder (32) descends and is closed under the action of the torsion spring (343) when the mixing cylinder (32) ascends.
2. The plastic particle stirring tank with self-cleaning function according to claim 1, characterized in that, The included angle between the inclined blades (35) of the impeller disc (33) and the disc surface ranges from 30 to 60 degrees, and the inclined directions of the blades of adjacent impeller discs (33) are opposite.
3. The plastic particle stirring tank with self-cleaning function according to claim 1, characterized in that, The observation window (15) is a double-layered tempered glass structure, the inner side surface is coated with a hydrophobic coating, and the outer edge is provided with a scale ruler.
4. The plastic particle stirring tank with self-cleaning function according to claim 1, characterized in that, The bottom of the tank body (11) is a conical structure, the conical angle ranges from 60 to 90 degrees, and the discharging port (13) is located at the top of the cone.
5. The plastic particle stirring tank with self-cleaning function according to claim 1, characterized in that, 6. The plastic particle stirred tank with self-cleaning function according to claim 1, characterized in that,