Mixing preparation device for silicone rubber cable material

Abstract

The utility model relates to the technical field of material mixing, in particular to a silicone rubber cable material mixing preparation device which comprises a stirring barrel and two cover plates rotationally connected to the upper end of the stirring barrel, and a guide rail surrounding the inner wall of the stirring barrel is fixedly arranged in the stirring barrel; a stirring assembly penetrating through the cover plate is arranged above the stirring barrel and comprises a stirring rod connected with an output shaft of the motor, the stirring rod is sequentially provided with a propeller, a shearing paddle and a bottom scraper from top to bottom, the outer edge of the propeller is in sliding contact with the guide rail, and the radial size of the shearing paddle is smaller than that of the propeller; the bottom scraper is kept in contact with the inner bottom surface of the stirring barrel, a forced lifting channel is formed through cooperation of the guide rail and the propeller, materials are conveyed upwards along the guide rail during stirring, then fall naturally and form closed-loop circulation with a cutting area of the shearing paddle, and layering of the materials is thoroughly eliminated.

Description

Technical Field

[0001] This utility model relates to the field of material mixing technology, and more specifically, to a mixing and preparation apparatus for silicone rubber cable material. Background Technology

[0002] The preparation of silicone rubber cable material requires the thorough mixing of various raw materials, such as base rubber, fillers, and crosslinking agents.

[0003] Traditional mixing devices often employ a single stirring structure, which easily leads to material stratification during high-speed mixing. Denser fillers sink while lighter additives float, resulting in insufficient mixing uniformity. This is especially problematic in high-viscosity systems like silicone rubber, where conventional impellers struggle to create a three-dimensional circulating flow field, resulting in low mixing efficiency. Furthermore, material tends to accumulate at the bottom of the mixing tank, and long-term residue can harden and clump, contaminating subsequent batches. While existing technologies incorporate scrapers, the rigid contact between the scraper and the tank bottom generates wear debris and fails to simultaneously address stratification and break up agglomerated particles.

[0004] Therefore, there is an urgent need for a mixing and preparation device for silicone rubber cable materials to improve the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide a mixing and preparation device for silicone rubber cable materials. A guide rail and a propeller work together to form a forced lifting channel. During mixing, the material is conveyed upwards along the guide rail and then falls naturally, forming a closed-loop circulation with the cutting area of ​​the shearing paddle. This completely eliminates material stratification, thus solving the problems mentioned in the background art.

[0006] Traditional mixing devices often employ a single stirring structure, which can easily lead to material stratification during high-speed mixing. Denser fillers sink while lighter additives float, resulting in insufficient mixing uniformity.

[0007] To achieve the above objectives, this utility model provides a mixing and preparation device for silicone rubber cable material, including a mixing tank and two cover plates rotatably connected to the upper end of the mixing tank. A guide rail is fixedly provided inside the mixing tank and surrounds the inner wall of the mixing tank.

[0008] The mixing tank is equipped with a mixing assembly that penetrates the cover plate. The mixing assembly includes a mixing rod connected to the output shaft of a motor. The mixing rod is provided with a propeller, a shearing blade and a bottom scraper from top to bottom. The outer edge of the propeller maintains sliding contact with the guide rail. The radial dimension of the shearing blade is smaller than that of the propeller. The bottom scraper maintains contact with the bottom surface of the mixing tank.

[0009] In the above technical solution, when the motor drives the stirring rod to rotate, the propeller forms a spiral upward trajectory along the guide rail while rotating, continuously pushing the bottom material upward. After the lifted material reaches the upper part of the mixing tank, it is released from the guide rail and falls naturally to the shear blade area under the action of gravity. At this time, the shear blade cuts the falling material at high speed with a linear velocity higher than that of the propeller, breaking up the filler agglomerates. The synchronously rotating bottom scraper closely adheres to the bottom surface of the mixing tank and performs circumferential scraping, re-rolling the deposited material into the propeller action area, forming a three-dimensional circulating mixing path of "lifting-cutting-falling-lifting again", realizing the all-round efficient dispersion of the silicone rubber system.

[0010] Based on this, the propeller, with its blades tilted at 30°-45°, forms a 0.5-2mm gap with the inner wall of the guide rail. This reduces frictional resistance while using the axial force generated by the blade tilt angle to continuously push the bottom material upward. The spiral blades of the shearing paddle rotate at high speed with the stirring rod, applying multi-directional shearing force to the falling material. The spiral trajectory extends the material residence time to enhance the breaking of filler agglomerates. The bottom scraper, with its curved elastic steel sheet curvature and fit against the bottom surface of the mixing tank, dynamically scrapes away adhering material with its flexible end flange.

[0011] In another technical solution, the motor is fixed to the upper surface of the mixing tank by an adjustable bracket. The bracket is equipped with a height adjustment bolt, and a rotating sealing ring is provided between the mixing rod and the cover plate. The two cover plates are symmetrically arranged with their diameter at one end as the center line, and are opened and closed by hinges at 90°.

[0012] In this technical solution, the motor is fixed to the upper surface of the mixing tank by an adjustable bracket, and the vertical coaxiality of the mixing rod can be precisely controlled by adjusting the height adjustment bolt; the rotary sealing ring between the mixing rod and the cover plate forms a dynamic seal when rotating at high speed, preventing low molecular weight volatiles in the silicone rubber mixture from escaping along the gap of the mixing rod; the two cover plates are symmetrically arranged with the diameter as the center line and are hinged to achieve 90° flip opening and closing.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This mixing and preparation device for silicone rubber cable materials features a guide rail and a propeller that work together to form a forced lifting channel. During mixing, the material is conveyed upwards along the guide rail and then falls naturally, forming a closed loop with the cutting area of ​​the shear blade, thus completely eliminating material stratification. The propeller is responsible for conveying the material over a large area, while the smaller shear blade performs high-speed cutting of locally agglomerated particles. The dual-stage mixing structure balances mixing efficiency and dispersion fineness, making it particularly suitable for high-viscosity silicone rubber systems. The bottom scraper adopts an elastic fit design, continuously scraping away the material adhering to the bottom of the barrel as the mixing rod rotates. The flexible flange avoids the generation of metal shavings from rigid friction, ensuring the purity of the material. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0016] Figure 2 This is a schematic diagram of the mixing tank structure in an embodiment;

[0017] Figure 3 This is a cross-sectional view of the mixing tank in the embodiment.

[0018] Figure 4 This is a schematic diagram of the stirring assembly structure in an embodiment.

[0019] The meanings of the labels in the diagram are as follows:

[0020] 100. Mixing tank; 110. Cover plate; 120. Support frame; 130. Guide rail;

[0021] 200. Stirring assembly; 210. Motor; 220. Stirring rod; 230. Propeller; 240. Shearing blade; 250. Bottom scraper. Detailed Implementation

[0022] 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.

[0023] For now, please refer to Figures 1-4 As shown, this embodiment provides a mixing and preparation device for silicone rubber cable material, including a stirring assembly 200. The stirring assembly 200 includes a stirring rod 220 connected to the output shaft of a motor 210. The stirring rod 220 is provided with a propeller 230, a shearing blade 240 and a bottom scraper 250 arranged sequentially from top to bottom. The outer edge of the propeller 230 maintains sliding contact with the guide rail 130. The radial dimension of the shearing blade 240 is smaller than that of the propeller 230. The bottom scraper 250 maintains contact with the inner bottom surface of the mixing tank 100.

[0024] During implementation, the propeller 230 slides against the guide rail 130, generating spiral lift along the guide rail 130 during its rotation, continuously pushing the bottom material upwards along the guide rail 130. After the lifted material reaches the upper part of the mixing tank 100, it leaves the range of action of the propeller 230 and falls to the area of ​​the shear blade 240 under gravity. The shear blade 240, with its smaller radial dimension, performs high-speed cutting to break up the filler agglomerates. The synchronously rotating bottom scraper 250 closely adheres to the bottom surface of the mixing tank 100, scraping up the settled material again and pushing it back into the range of action of the propeller 230, thus achieving all-round and efficient dispersion of the silicone rubber cable material.

[0025] See Figure 2 As shown, the two cover plates 110 are symmetrically arranged with the diameter as the center line and are hinged to achieve 90° flip opening and closing.

[0026] Figure 3 In the process, the outer edge of the propeller 230 maintains sliding contact with the spirally extending guide rail 130, so that the propeller 230 generates directional lift along the spiral path of the guide rail 130 while rotating, and continuously conveys the bottom material upward in an inclined trajectory that matches the spiral lift angle.

[0027] Additionally, see Figure 3 As shown, the motor 210 is fixed to the upper surface of the mixing tank 100 by the adjustable bracket 120, and the vertical coaxiality of the mixing rod 220 can be precisely controlled by adjusting the height adjustment bolt.

[0028] See Figure 4 As shown, when the motor 210 drives the stirring rod 220 to rotate, the outer edge of the propeller 230 maintains sliding contact with the guide rail 130 on the inner wall of the mixing tank 100. The rotation of the propeller 230 generates an upward axial thrust, which lifts the bottom material along the guide rail 130 to the upper part of the mixing tank 100. At this time, the high-speed rotating shear blade 240 cuts the falling material at multiple angles, effectively breaking up the filler agglomerates. At the same time, the bottom scraper 250 rotates synchronously against the inner bottom surface of the mixing tank 100, continuously scraping off the deposited material and throwing it back into the action area of ​​the propeller 230, thereby achieving efficient and uniform dispersion of the silicone rubber cable material.

[0029] In this embodiment, the mixing and preparation device for silicone rubber cable material is used in the following way: First, when the motor 210 drives the stirring rod 220 to rotate, the outer edge of the propeller 230 maintains sliding contact with the guide rail 130 on the inner wall of the mixing tank 100. The axial component force generated by the tilt angle of the propeller blades lifts the bottom material along the guide rail 130 to the upper part of the mixing tank 100. After the lifted material leaves the guide rail 130, it falls due to gravity and enters the action area of ​​the shear blade 240 with a smaller radial dimension. The spiral blade applies multi-directional shear force to the falling material, extending the cutting path to fully break up the filler agglomerates. The synchronously rotating arc-shaped bottom scraper 250 uses elastic deformation to tightly fit the bottom of the tank. The flexible flange at the end dynamically scrapes off the deposited material and throws it back into the action area of ​​the propeller 230, forming a cyclic mixing path of "directional lifting - spiral cutting - flexible scraping", which completely eliminates the stratification and dead corners of the high-viscosity silicone rubber system.

[0030] The 0.5-2mm gap between the propeller 230 and the guide rail 130 reduces frictional resistance, and the 30°-45° blade tilt angle optimizes efficiency and energy consumption ratio; the adjustable bracket 120 ensures the vertical coaxiality of the stirring rod 220 through the height adjustment bolt, avoiding abnormal wear of the guide rail 130; the rotating sealing ring and the symmetrical hinged cover plate 110 form a double sealing barrier, which can facilitate feeding while effectively preventing material overflow during stirring by opening and closing at 90°.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mixing and preparation apparatus for silicone rubber cable material, comprising a mixing tank (100) and two cover plates (110) rotatably connected to the upper end of the mixing tank (100), characterized in that: The mixing tank (100) is fixedly provided with a guide rail (130) surrounding the inner wall of the mixing tank (100); The mixing tank (100) is provided with a stirring assembly (200) that penetrates the cover plate (110) above it. The stirring assembly (200) includes a stirring rod (220) connected to the output shaft of a motor (210). The stirring rod (220) is provided with a propeller (230), a shear blade (240) and a bottom scraper (250) from top to bottom. The outer edge of the propeller (230) maintains sliding contact with the guide rail (130). The radial dimension of the shear blade (240) is smaller than that of the propeller (230). The bottom scraper (250) maintains contact with the inner bottom surface of the mixing tank (100).

2. The mixing and preparation apparatus for silicone rubber cable material according to claim 1, characterized in that: The blade tilt angle of the propeller (230) is 30°-45°, and its rotation trajectory forms a 0.5-2mm gap fit with the inner wall of the guide rail (130).

3. The mixing and preparation apparatus for silicone rubber cable material according to claim 1, characterized in that: The shearing blade (240) is composed of blades arranged in a spiral shape around the surface of the stirring rod (220).

4. The mixing and preparation apparatus for silicone rubber cable material according to claim 1, characterized in that: The bottom scraper (250) is an arc-shaped elastic steel sheet with the same radius of curvature as the bottom radius of the mixing tank (100). The scraper end is provided with a flexible flange of 2-5mm.

5. The mixing and preparation apparatus for silicone rubber cable material according to claim 1, characterized in that: The motor (210) is fixed to the upper surface of the mixing tank (100) by an adjustable bracket (120), and the bracket (120) is provided with height adjustment bolts.

6. The mixing and preparation apparatus for silicone rubber cable material according to claim 1, characterized in that: A rotary sealing ring is provided between the stirring rod (220) and the cover plate (110).

7. The mixing and preparation apparatus for silicone rubber cable material according to claim 1, characterized in that: The two cover plates (110) are symmetrically arranged with their diameters at one end as the center line, and are hinged to achieve 90° flip-opening and closing.

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