Automatic feeding type vacuum kneader

Abstract

The present application relates to the technical fields of preparation or pretreatment of molding materials, and more particularly to an automatic feeding type vacuum kneader, which comprises a base frame, a material box and a material tank fixedly connected to the base frame, a feeding port installed at the upper end of the material box, a material pipe with a valve and a pump connected between the feeding port and the material tank, a cover plate sealingly covered on the upper end of the material tank, a motor fixedly connected to the cover plate, a core shaft connected to the output shaft of the motor through a coupling, a shaft sleeve installed on the core shaft, a plurality of rotating shafts symmetrically and rotatably connected to the shaft sleeve, inner C-shaped paddles fixedly connected to each rotating shaft, outer C-shaped paddles installed on each rotating shaft and located outside the inner C-shaped paddles, and the inner C-shaped paddles and the outer C-shaped paddles being rotatable relative to the axis of the rotating shafts in opposite directions. The beneficial effects are that the slurry can be continuously sheared in the vertical and horizontal planes, the synergistic effect of vortex dispersion and mechanical shearing is achieved, the material mixing uniformity, shearing effect and dispersion performance are improved, and the production requirements of different materials and processes are met.

Description

Technical Field

[0001] This invention relates to the field of material preparation or pretreatment technology, and more specifically to an automatic feeding vacuum kneader. Background Technology

[0002] Kneaders are key equipment for kneading and mixing high-viscosity, elasto-plastic materials. While traditional kneaders have played a role in material mixing, they have several limitations. Regarding mixing uniformity, traditional kneaders often use a dual-blade mixing system, resulting in low mixing quality. Material at the bottom rarely comes into contact with the kneading blades, leading to uneven mixing. Even with scraping mechanisms, such as the kneading paddle twin-shaft mixer (publication number CN115253756A), which improves the kneading method and enhances mixing quality and efficiency, the material at the bottom, though scraped away, still doesn't easily rise to the top and mix thoroughly with other materials. In terms of shearing effect, traditional kneaders typically rely on the rotation of the agitator to generate shear force; however, this single shearing method often fails to meet the demands of efficient processing of high-viscosity, highly elasto-plastic materials. For some special materials, such as high-viscosity rubbery plastics, which have long molecular chains and high viscosity, traditional kneaders are unable to react and mix them evenly in a short time. This can lead to problems such as local overheating and uneven mixing during the kneading process, affecting product quality and production efficiency. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides a topic with the beneficial effect of continuously shearing the slurry in both vertical and horizontal planes, realizing the synergistic effect of eddy dispersion and mechanical shearing, improving the material mixing uniformity, shearing effect and dispersion performance, and meeting the production needs of different materials and processes.

[0004] The technical solution adopted by this invention to solve its technical problem is: An automatic feeding vacuum kneader includes a base frame, on which a material box and a feed inlet are fixedly mounted. The feed inlet and the material box are connected by a material pipe equipped with a valve and a pump. A cover plate is sealed on the top of the material box, and a motor is fixedly mounted on the cover plate. The output shaft of the motor is connected to a spindle via a coupling. A bushing is mounted on the spindle, and multiple rotating shafts are symmetrically rotatably connected to the bushing. Each rotating shaft has an inner C-shaped blade fixedly mounted on it, and each rotating shaft also has an outer C-shaped blade located outside the inner C-shaped blade. The inner C-shaped blade and the outer C-shaped blade can rotate in opposite directions relative to the axis of the rotating shaft.

[0005] The upper limit of the bushing is rotatably connected to bevel gear II. Bevel gear II is mounted on the material box via a slide. Bevel gear I, which meshes and drives with bevel gear II, is fixed on the rotating shaft.

[0006] Two supports are symmetrically fixed to the bushing, and each support is rotatably connected to a ring frame. The inner rings of the two ring frames are fixed with gear rings, and the two outer C-shaped blades are respectively fixed to the two gear rings.

[0007] Both brackets are rotatably connected to gear shafts, and both shafts are fixedly connected to central gears. The gear shafts mesh with the gear ring and central gear on the same side for transmission. Beneficial effects

[0008] When the outer C-shaped blades and the inner C-shaped blades move in a circular motion around the spindle axis, they can cut the vertical space inside the hopper. When the outer C-shaped blades and the inner C-shaped blades rotate in opposite directions, they can cut the horizontal space. With the cooperation of the two movements, the slurry can be continuously sheared in both the vertical and horizontal planes, achieving a synergistic effect of eddy current dispersion and mechanical shearing. Attached Figure Description

[0009] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0010] Figure 1 This is a schematic diagram of an automatic feeding vacuum kneader. Figure 2 for Figure 1 Partial cross-sectional structural schematic diagram; Figure 3 This is a schematic diagram of the base frame structure; Figure 4 This is a schematic diagram of the material bin structure; Figure 5 This is a schematic diagram of the cover plate structure; Figure 6 A schematic diagram of the structure for the mating of the mandrel and bushing; Figure 7 A schematic diagram of the fit between the bushing and bevel gear II; Figure 8 This is a schematic diagram of the structure of the inner C-shaped blade; Figure 9 This is a schematic diagram showing the structure of the gear shaft merging with the gear ring and the center gear. Figure 10 This is a schematic diagram of the external C-shaped blade. Figure 11 A schematic diagram of the structure of the outer C-shaped blade and the inner C-shaped blade in combination; Figure 12 This is a schematic diagram of the bracket structure; Figure 13 This is a schematic diagram of the structure of the insert passing through the slot.

[0011] In the diagram: Base frame 101; Material box 102; Material pipe 103; Material box 104; Feed inlet 105; Cover plate 106; Motor 107; Spindle 108; Bushing 201; Rotating shaft 202; Inner C-shaped blade 203; Bevel gear I 204; Center gear 205; Groove 206; Protrusion I 207; Support 301; Gear shaft 302; Ring frame 303; Gear ring 304; Outer C-shaped blade 305; Column 306; Protrusion II 307; Insert frame 308; Slide 401; Electric push rod 402; Bevel gear II 403. Detailed Implementation

[0012] like Figures 1 to 11 As shown: An automatic feeding vacuum kneader includes a base frame 101, on which a material box 102 and a material box 104 are fixedly connected. A feed inlet 105 is installed at the upper end of the material box 104. The feed inlet 105 and the material box 102 are connected by a material pipe 103 with a valve and a pump. A cover plate 106 is sealed and covered at the upper end of the material box 104. A motor 107 is fixedly connected to the cover plate 106. The output shaft of the motor 107 is connected to a spindle 108 through a coupling. A bushing 201 is installed on the spindle 108. Multiple rotating shafts 202 are symmetrically rotatably connected to the bushing 201. An inner C-shaped blade 203 is fixedly connected to each rotating shaft 202. An outer C-shaped blade 305 located outside the inner C-shaped blade 203 is also installed on each rotating shaft 202. The inner C-shaped blade 203 and the outer C-shaped blade 305 can rotate in opposite directions relative to the axis of the rotating shaft 202. When it is necessary to add material to the material tank 104, first open the valve on the material pipe 103, and then start the pump on the material pipe 103 to transport the slurry in the material tank 102 from the material pipe 103 to the material tank 104 to complete the feeding. In addition, when the slurry in the material tank 102 is insufficient, open the sealing cover on the material tank 102 to replenish the slurry in the material tank 102.

[0013] The motor 107 starts, driving the spindle 108 to rotate. The spindle 108 drives the bushing 201 to rotate, and the bushing 201 drives two sets of cooperating inner C-shaped blades 203 and outer C-shaped blades 305 to perform circular motion around the axis of the spindle 108, thereby agitating the slurry in the hopper 104. Simultaneously, as the outer C-shaped blades 305 and inner C-shaped blades 203 rotate around the axis of the spindle 108, they can rotate in opposite directions relative to the axis of the rotating shaft 202. This counter-rotation of the inner C-shaped blades 203 and outer C-shaped blades 305 creates a strong shearing force between the inner C-shaped blades 203 and outer C-shaped blades 305, which helps break up particle agglomerates in the slurry, making the material more uniformly dispersed and improving dispersibility. At the same time, the shearing action can refine solid particles or droplets in the slurry, improving the dispersibility and uniformity of the material. The counter-rotating inner C-shaped blades 203 and outer C-shaped blades 305 promote stronger convection of the slurry within the tank 104, reducing mixing dead zones and allowing the slurry to reach a homogeneous state more quickly. Due to the enhanced shear and convection, the mixing efficiency of the slurry is significantly improved, thereby shortening the production cycle. The counter-rotating inner C-shaped blades 203 and outer C-shaped blades 305 effectively prevent the slurry from accumulating or agglomerating within the tank 104, ensuring that the material remains in a flowing state. The counter-rotating inner C-shaped blades 203 and outer C-shaped blades 305 are particularly suitable for handling high-viscosity or difficult-to-mix slurries, effectively overcoming the viscous resistance of the material, thereby reducing slurry adhesion to the inner walls of the C-shaped blades 203 and outer C-shaped blades 305, ensuring the stability of equipment operation.

[0014] Furthermore, when the outer C-shaped blade 305 and the inner C-shaped blade 203 move in a circular motion around the axis of the spindle 108, they can cut the vertical space within the material box 104. The opposite rotation of the outer C-shaped blade 305 and the inner C-shaped blade 203 can cut the horizontal space. With these two movements working together, the slurry can be continuously sheared in both the vertical and horizontal planes, achieving a synergistic effect of eddy current dispersion and mechanical shearing. When the material passes through the intersection area of ​​the outer C-shaped blade 305 and the inner C-shaped blade 203, it is first vertically cut and broken down into large particles, and then further refined by horizontal shearing. This graded processing method of coarse and fine shearing can effectively break up agglomerates of nano- or micro-sized particles, significantly improving dispersibility. For high-viscosity slurries, vertical cutting can disrupt their rheological properties, making the material more susceptible to horizontal shearing forces, thereby reducing overall stirring resistance and improving the equipment's processing capacity.

[0015] like Figure 6 and 7 As shown: The upper limit rotatable connection of the bushing 201 is the bevel gear II 403. The bevel gear II 403 is mounted on the material box 104 through the slide 401. The bevel gear I 204, which meshes and drives with the bevel gear II 403, is fixedly connected to the rotating shaft 202. When the bushing 201 drives the rotating shaft 202 to make clockwise circular motion in the horizontal plane around the axis of the spindle 108, the rotating shaft 202 drives the bevel gear I 204 to make clockwise circular motion in the horizontal plane simultaneously. The bevel gear II 403 does not rotate. The bevel gear I 204 drives the rotating shaft 202 to rotate counterclockwise in the vertical plane by meshing with the bevel gear II 403. This causes the rotating shaft 202 to drive the inner C-shaped blade 203 to rotate counterclockwise. While the inner C-shaped blade 203 is making circular motion around the axis of the spindle 108, it can also rotate counterclockwise, thereby continuously agitating the slurry.

[0016] like Figures 8 to 11 As shown: Two brackets 301 are symmetrically fixed to the bushing 201. Each of the two brackets 301 is rotatably connected to a ring frame 303. The inner rings of the two ring frames 303 are fixed to a gear ring 304. The two outer C-shaped blades 305 are respectively fixed to the two gear rings 304. Two brackets 301 are rotatably connected to gear shafts 302, and two rotating shafts 202 are fixedly connected to central gears 205. The gear shafts 302 are meshed and connected to the gear rings 304 and central gears 205 on the same side.

[0017] The engagement of the ring frame 303 and the support 301 provides support for the ring frame 303 and the outer C-shaped blade 305. At the same time, the ring frame 303 can rotate on the support 301. Since the rotating shaft 202 is coaxial with the central gear 205 and the rotating shaft 202, the outer C-shaped blade 305 and the inner C-shaped blade 203 can rotate coaxially.

[0018] When the rotating shaft 202 rotates counterclockwise in the vertical plane, it drives the central gear 205 to rotate counterclockwise. The central gear 205 meshes with the gear shaft 302, causing the gear shaft 302 to rotate clockwise. The gear shaft 302 meshes with the gear ring 304, causing the outer C-shaped blades 305 on the ring frame 303 to rotate clockwise. The clockwise rotating outer C-shaped blades 305 and the counterclockwise rotating inner C-shaped blades 203 form opposite rotations. The counterclockwise rotating outer C-shaped blades 305 and inner C-shaped blades 203 generate interlaced vortices in the horizontal direction, creating a complex flow field for the material within the material box 104. When the slurry passes through the intersection area, the shear force at the intersection edge formed by the outer C-shaped blades 305 and inner C-shaped blades 203 is further refined, achieving efficient dispersion and uniform mixing of the material.

[0019] like Figures 4 to 7 As shown: The bushing 201 is slidably connected to the spindle 108. Two prisms are symmetrically fixed on the spindle 108. Two grooves that mate with the prisms are opened on the inner wall of the bushing 201. The bottom surface of the material box 104 is sealed and slidably connected to the slide 401. The bevel gear II 403 is fixed to the upper end of the slide 401. An electric push rod 402 is fixed between the bottom surface of the material box 104 and the slide 401. The electric push rod 402 starts and drives the slide 401 to move vertically back and forth. The slide 401 drives the bushing 201 to move vertically back and forth along the axis of the spindle 108 via the bevel gear II 403. In turn, the bushing 201 drives the outer C-shaped blades 305 and the inner C-shaped blades 203 on both sides to move vertically back and forth in the material box 104, thereby realizing the full shearing and mixing of different layers of adhesive materials, making the slurry more comprehensive and uniform.

[0020] like Figures 10 to 11 As shown: A column 306 is fixedly connected to the middle of the outer C-shaped blade 305. The column 306 is located in the middle of the outer C-shaped blade 305. When the inner C-shaped blade 203 rotates, the column 306 will further cut the space in the middle of the inner C-shaped blade 203, thereby shearing the slurry passing through the middle of the inner C-shaped blade 203, improving the shearing surface of the slurry, and further improving the mixing effect of the slurry.

[0021] like Figures 11 to 13 As shown: The inner C-shaped blade 203 has two symmetrical slots 206, and the outer C-shaped blade 305 has two symmetrically detachable brackets 308 that can pass through the slots 206. When the outer C-shaped blade 305 and the inner C-shaped blade 203 rotate in opposite directions, the insert 308 will continuously pass through the slot 206, thereby shearing the slurry passing through the two slots 206 again, so that the material is repeatedly cut, turned and recombined during the mixing process, so that materials of different components can be mixed together more evenly.

[0022] like Figure 8 and 11 As shown: Multiple protruding ribs II 307 are fixedly connected to the column 306, and multiple protruding ribs I 207 are symmetrically fixed to the inner wall of the inner C-shaped blade 203. The protruding ribs II 307 are located between two adjacent protruding ribs I 207. When the outer C-shaped blade 305 and the inner C-shaped blade 203 rotate in opposite directions, the convex rib II 307 continuously passes through the two adjacent convex ribs I 207, causing the rubber-based material to be subjected to stronger shear force during the stirring process. This shearing action helps to break down the large molecular chains or aggregates in the rubber-based material, promoting the uniform dispersion and refinement of the material.

[0023] During the mixing process, the multiple interlocking ridges I207 and II307 can provide more frictional heat, which helps to plasticize the rubber-based material. Furthermore, the plasticized rubber-based material has better flowability and moldability, which facilitates subsequent processing and molding operations, and also prevents slurry residue from remaining inside the material bin 104.

[0024] like Figure 2 As shown: The outer C-shaped blade 305 is attached to the inner wall of the material box 104, thereby enabling the outer C-shaped blade 305 to scrape off the slurry adhering to the inner wall of the material box 104 when it makes a circular motion, thus avoiding slurry residue.

[0025] like Figures 8 to 10 As shown: The bracket 301 has an arc-shaped groove with the same cross-section as the ring frame 303. The ring frame 303 is formed by welding two semi-circular rings with trapezoidal cross-sections together, which facilitates the installation of the ring frame 303 onto the bracket 301.

[0026] The outer diameter of the ring frame 303 is wider than the inner diameter; this limits the ring frame 303 to prevent it from separating from the support 301 while not affecting its rotation on the support 301.

Claims

1. An automatic feeding vacuum kneader, comprising a base frame, a material box and a feed hopper fixedly connected to the base frame, a feed inlet installed at the upper end of the material box, the feed inlet and the material box being connected by a material pipe equipped with a valve and a pump, and a cover plate sealing the upper end of the material box, characterized in that, A motor is fixedly connected to the cover plate. The output shaft of the motor is connected to a spindle via a coupling. A bushing is installed on the spindle. Multiple rotating shafts are symmetrically connected to the bushing. An inner C-shaped blade is fixedly connected to each rotating shaft. An outer C-shaped blade located outside the inner C-shaped blade is also installed on each rotating shaft. The inner C-shaped blade and the outer C-shaped blade can rotate in opposite directions relative to the axis of the rotating shaft.

2. The automatic feeding vacuum kneader according to claim 1, characterized in that, The upper limit of the bushing is rotatably connected to bevel gear II. Bevel gear II is mounted on the material box via a slide. Bevel gear I, which meshes and drives with bevel gear II, is fixed on the rotating shaft.

3. An automatic feeding vacuum kneader according to claim 2, characterized in that, Two brackets are symmetrically fixed to the bushing, and each bracket is rotatably connected to a ring frame. The inner rings of the two ring frames are fixed with gear rings, and the two outer C-shaped blades are respectively fixed to the two gear rings.

4. An automatic feeding vacuum kneader according to claim 3, characterized in that, Both brackets are rotatably connected to gear shafts, and both shafts are fixed with central gears. The gear shafts mesh with the gear ring and central gear on the same side for transmission.

5. An automatic feeding vacuum kneader according to claim 4, characterized in that, The bushing is slidably connected to the mandrel, and two prisms are symmetrically fixed on the mandrel. Two grooves that mate with the prisms are opened on the inner wall of the bushing. The bottom surface of the material box is sealed and slidably connected to a slide. The bevel gear II is fixedly connected to the upper end of the slide. An electric push rod is fixed between the bottom surface of the material box and the slide.

6. An automatic feeding vacuum kneader according to claim 5, characterized in that, A column is fixed to the middle of the outer C-shaped blade.

7. An automatic feeding vacuum kneader according to claim 6, characterized in that, Two slots are symmetrically opened on the inner C-shaped blade, and two detachable brackets that can pass through the slots are symmetrically connected on the outer C-shaped blade.

8. An automatic feeding vacuum kneader according to claim 7, characterized in that, Multiple protruding ridges II are fixedly connected to the column rod, and multiple protruding ridges I are symmetrically fixed to the inner wall of the inner C-shaped blade. The protruding ridges II are located between two adjacent protruding ridges I.

9. An automatic feeding vacuum kneader according to claim 1, characterized in that, The outer C-shaped blades fit snugly against the inner wall of the hopper.

10. An automatic feeding vacuum kneader according to claim 3, characterized in that, The ring frame is made by welding two trapezoidal semicircular rings together, and the outer diameter of the ring frame is wider than the inner diameter.

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