Silicone rubber production vacuum kneader

Abstract

The utility model relates to vacuum kneading machine technical field discloses silicon rubber production vacuum kneading machine, including base, the base top fixedly connected with controller, the base top fixedly connected with fixed frame, the fixed frame inside fixedly connected with kneading cylinder, the kneading cylinder bottom is provided with the discharge gate, be provided with the stirring device in the kneading cylinder, the kneading cylinder inside slide connection has the cylinder cover, the cylinder cover bottom is provided with floating assembly, the floating assembly includes telescopic link, one end fixedly connected in telescopic link the cylinder cover bottom. In the utility model, through telescopic link and spring one make the pressing plate can be in the kneading cylinder up and down float, the pressing plate can automatically adjust position according to the volume change and pressure fluctuation of material, always keep proper pressure to material, solved in the kneading process, floating type cylinder cover can automatically adjust position according to its change, avoid the problem that pressure is uneven because of material volume change, improved production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vacuum kneading machine technology, and in particular to a vacuum kneading machine for silicone rubber production. Background Technology

[0002] Vacuum kneaders for silicone rubber production are key equipment in the field of polymer material processing. They are mainly used for mixing, kneading, and degassing viscous materials such as silicone rubber and sealants. With the rapid development of industries such as new energy vehicles and electronic packaging, higher requirements have been placed on the uniformity and bubble content of silicone rubber products. Traditional kneading processes require multiple stages such as filling, mixing, and vacuuming. During the kneading process, the material will shrink and expand in volume due to shearing. This dynamic change poses a severe challenge to the sealing performance and pressure control of the equipment. Modern silicone rubber production requires kneaders to not only achieve high vacuum but also have dynamic adjustment functions to adapt to changes in the rheological properties of the material. This places new technical requirements on the design of the cylinder sealing structure and pressure control system.

[0003] Existing vacuum kneaders generally adopt a structural design with a fixed cylinder head and a hydraulic locking device. The cylinder head is rigidly connected to the cylinder body by multiple bolts distributed around its perimeter. A static pressure plate made of metal or composite material is installed inside. The technical principle is that the pressure plate is driven down by an external hydraulic system. During the vacuuming stage, the sealing ring is used to achieve airtight sealing. During the material mixing process, the stirring paddle generates axial and radial shear forces at a speed of 5-20 rpm, so that the material is dispersed and homogenized in a vacuum environment. Some high-end equipment is equipped with a pressure sensor to monitor the pressure changes inside the cylinder, but the position of the pressure plate is usually controlled by a preset program and does not have a real-time dynamic adjustment function. This structural design has been used for more than ten years in the processing of high-viscosity materials such as silicone rubber. Its basic working principle comes from the pressure vessel concept of early internal mixers.

[0004] The main problem with existing technologies is their inability to effectively address the dynamic changes in material volume during the kneading process. Silicone rubber undergoes significant volume shrinkage under shearing action, followed by volume expansion during the degassing stage. Fixed-position pressure plates can cause gaps or excessive compression between the material and the plates, leading not only to vacuum leakage and degassing but also to uneven pressure distribution causing localized overheating or inadequate mixing, ultimately affecting product density and physical properties. This pressure fluctuation is particularly problematic when producing high-hardness silicone rubber, as it exacerbates changes in the load on the stirring shaft and can even cause equipment vibration, becoming a key bottleneck restricting production efficiency and product quality improvement. Therefore, a vacuum kneader for silicone rubber production is proposed to address these issues. Utility Model Content

[0005] The purpose of this invention is to provide a heating device for preparing glass fire retardant liquid, which aims to improve the technical problem that when the magnet malfunctions during equipment use, it is necessary to perform complicated operations to disassemble the protective shell for inspection.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a vacuum kneader for producing silicone rubber, comprising a base, a controller fixedly connected to the top of the base, a fixed frame fixedly connected to the top of the base, a kneading cylinder fixedly connected inside the fixed frame, a discharge port opened at the bottom of the kneading cylinder, a stirring device provided inside the kneading cylinder, a cylinder cover slidably connected inside the kneading cylinder, and a floating component provided at the bottom of the cylinder cover.

[0007] The floating assembly includes a telescopic rod, one end of which is fixedly connected to the bottom of the cylinder head, and the other end of which is fixedly connected to a pressure plate. A spring-loaded assembly is provided on the outer wall of the telescopic rod. A first sealing strip is provided inside the cylinder head, and a second sealing strip is provided inside the pressure plate. The outer wall of the first sealing strip is in contact with the inner wall of the kneading cylinder, and the outer wall of the second sealing strip is in contact with the inside of the kneading cylinder. A quick-release assembly is provided inside the cylinder head.

[0008] As a further description of the above technical solution:

[0009] The rebound assembly includes a spring, one end of which is fixedly connected to the bottom of the cylinder head, and the other end of which is fixedly connected to the top of the pressure plate.

[0010] As a further description of the above technical solution:

[0011] The quick-release assembly includes a sliding column and a locking block. The locking block is internally fixedly connected to the outer wall of the sliding column, and a rotating block is fixedly connected to one end of the sliding column.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the sliding column is rotatably connected to a hollow column, and the outer wall of the hollow column is slidably connected to the inside of the cylinder head.

[0014] As a further description of the above technical solution:

[0015] The outer wall of the sliding column is fixedly connected to a second limiting ring, and the outer wall of the second limiting ring is slidably connected inside the hollow column.

[0016] As a further description of the above technical solution:

[0017] The hollow column is rotatably connected to a limiting ring, and the outer wall of the sliding column is slidably connected to the inside of the limiting ring.

[0018] As a further description of the above technical solution:

[0019] A chuck is fixedly connected inside the kneading cylinder. A chuck hole is opened inside the chuck. The outer wall of the sliding column is slidably connected to the inside of the chuck. The chuck block and the chuck hole are engaged.

[0020] As a further description of the above technical solution:

[0021] A second spring is provided on the outer wall of the sliding column. One end of the second spring is fixedly connected to the outer wall of the second limiting ring, and the other end of the second spring is fixedly connected to the outer wall of the first limiting ring.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the pressure plate can float up and down in the kneading cylinder by means of a telescopic rod and a spring. During the kneading process, the pressure plate can automatically adjust its position according to the volume change and pressure fluctuation of the material, and always maintain appropriate pressure on the material. This solves the problem that the volume of the material will change during the kneading process. The floating cylinder cover can automatically adjust its position according to the change, ensuring that appropriate pressure is maintained on the material and avoiding the problem of uneven pressure caused by changes in the volume of the material, thereby improving production efficiency.

[0024] 2. In this utility model, a hollow column is inserted into the cylinder head. At this time, rotating the rotating block causes the locking block on the outer wall of the sliding column to slide through the locking hole to the bottom of the chuck. Then, rotating the rotating block causes the locking block and the chuck to engage. Releasing the rotating block releases the elastic potential energy of the spring, allowing it to return to its original position. This achieves the effect of quick installation and quick disassembly, solving the problem that traditional cylinder heads require multiple tools for installation and disassembly, which leads to prolonged downtime and improves convenience. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional schematic diagram of the vacuum kneading machine for producing silicone rubber proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the kneading cylinder structure of the vacuum kneader for silicone rubber production proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the pressure plate structure of the vacuum kneader for silicone rubber production proposed in this utility model.

[0029] Figure 4 This is a schematic diagram of the cylinder head structure of the vacuum kneader for silicone rubber production proposed in this utility model.

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 for Figure 4 Enlarged view of point B in the middle.

[0032] The following are the labeling elements in the figure:

[0033] 1. Base; 2. Controller; 3. Fixing frame; 4. Kneading cylinder; 5. Discharge port; 6. Mixing device; 7. Cylinder cover; 8. Sealing strip one; 9. Telescopic rod; 10. Spring one; 11. Pressure plate; 12. Sealing strip two; 13. Hollow column; 14. Sliding column; 15. Rotating block; 16. Limiting ring one; 17. Clamping block; 18. Spring two; 19. Limiting ring two; 20. Chuck; 21. Clamping hole. Detailed Implementation

[0034] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0038] Reference Figures 1-3 This utility model provides an embodiment of a vacuum kneading machine for silicone rubber production, comprising a base 1, which supports the entire equipment and ensures its stability (this is common knowledge and will not be described in detail here); a controller 2 is fixedly connected to the top of the base 1, which controls the equipment's operating parameters to achieve automated operation (this is common knowledge and will not be described in detail here); a fixing frame 3 is fixedly connected to the top of the base 1, which fixes the kneading cylinder 4 to ensure structural strength; the kneading cylinder 4 is fixedly connected inside the fixing frame 3, which contains materials and performs kneading processing (this is common knowledge and will not be described in detail here); a discharge port 5 is opened at the bottom of the kneading cylinder 4 to discharge the kneaded materials; a stirring device 6 is installed inside the kneading cylinder 4 to shear and mix the materials to achieve a uniform kneading effect (this is common knowledge and will not be described in detail here); a cylinder cover 7 is slidably connected inside the kneading cylinder 4 to seal the kneading cylinder 4 and ensure a vacuum environment; a floating component is installed at the bottom of the cylinder cover 7.

[0039] The floating assembly includes a telescopic rod 9, which restricts the movement trajectory of the pressure plate 11 to ensure vertical floating. A rebound assembly provides elastic support, allowing the pressure plate 11 to adapt to changes in material volume. One end of the telescopic rod 9 is fixedly connected to the bottom of the cylinder head 7, and the other end is fixedly connected to the pressure plate 11. The pressure plate 11 applies pressure to the material to prevent uneven material accumulation. One end of a spring 10 is fixedly connected to the bottom of the cylinder head 7, and the other end is fixedly connected to the top of the pressure plate 11. The spring 10, in conjunction with the telescopic rod 9, performs elastic telescopic movement, achieving dynamic adjustment of the position of the pressure plate 11. The cylinder cover 7 has a sealing strip 8 inside, which enhances the seal between the cylinder cover 7 and the kneading cylinder 4 to prevent vacuum leakage. The pressure plate 11 has a sealing strip 12 inside, which enhances the seal between the pressure plate 11 and the inner wall of the kneading cylinder 4 to prevent material from entering the gap. The outer wall of the sealing strip 8 fits against the inner wall of the kneading cylinder 4, and the outer wall of the sealing strip 12 fits against the inside of the kneading cylinder 4. The two work together to ensure the sealing effect during the kneading process. The cylinder cover 7 has a quick-release assembly inside, which is used to quickly install and remove the cylinder cover 7 to improve maintenance efficiency.

[0040] Reference Figures 4-6 The quick-release assembly includes a sliding column 14 and a locking block 17. The sliding column 14 transmits rotational motion and axial displacement, while the locking block 17 cooperates with the chuck 20 to achieve a locking function. The locking block 17 is internally fixedly connected to the outer wall of the sliding column 14 and moves synchronously with the sliding column 14 to achieve a linkage effect. A rotating block 15 is fixedly connected to one end of the sliding column 14, which is used for manual operation to apply rotational force. A hollow column 13 is rotatably connected to the outer wall of the sliding column 14, which supports the sliding column 14 and limits its range of motion. The outer wall of the hollow column 13 is slidably connected to the inside of the cylinder head 7 to achieve relative movement between the quick-release assembly and the cylinder head 7. A second limiting ring 19 is fixedly connected to the outer wall of the sliding column 14, which limits the axial displacement range of the sliding column 14. The outer wall of the second limiting ring 19 is slidably connected to the inside of the hollow column 13 to ensure motion stability. The hollow column 13 is internally rotatably connected to... A limiting ring 16 is connected to the sliding column 14, which bears the elastic force of the second spring 18 and transmits it to the sliding column 14. The outer wall of the sliding column 14 is slidably connected to the inside of the limiting ring 16, realizing relative rotation and axial sliding. A chuck 20 is fixedly connected inside the kneading cylinder 4, which provides a locking and positioning structure. A locking hole 21 is opened inside the chuck 20, which is used to cooperate with the locking block 17 to achieve quick locking. The outer wall of the sliding column 14 is slidably connected to the inside of the chuck 20 to realize the axial guiding function. The locking block 17 and the locking hole 21 engage to achieve the effect of quickly locking the cylinder head 7. A second spring 18 is provided on the outer wall of the sliding column 14, which provides the reset elastic force to maintain the locking state. One end of the second spring 18 is fixedly connected to the outer wall of the second limiting ring 19, and the other end of the second spring 18 is fixedly connected to the outer wall of the limiting ring 16, forming an elastic energy storage structure to realize the automatic reset function.

[0041] Working principle: When stirring silicone rubber, after the controller 2 is activated, the stirring device 6 starts working. The cylinder cover 7 forms a sealed space with the kneading cylinder 4 through a sliding connection. The sealing strip 8 ensures the sealing between the cylinder cover 7 and the kneading cylinder 4 to prevent vacuum leakage. When the floating component is working, the telescopic rod 9 guides the pressure plate 11 to move vertically. The spring 10 provides elastic support, allowing the pressure plate 11 to automatically adjust its position according to changes in material volume. When the material volume shrinks, the spring 10 pushes the pressure plate 11 downward. When the material expands, the pressure plate 11 moves upward to compress the spring 10. The sealing strip 12 inside the pressure plate 11 remains constantly... The cylinder head 7 is disassembled by rotating the rotating block 15, which causes the sliding column 14 to rotate inside the hollow column 13. At this time, the locking block 17 rotates at the bottom of the chuck 20, causing the locking block 17 to disengage from the chuck 20 through the locking hole 21. Then, the second spring 18 releases its elastic potential energy, causing the sliding column 14 to rebound into the hollow column 13. The second limiting ring 19 limits the sliding column 14 and the second spring 18. At this time, pulling the rotating block 15 can disengage the hollow column 13 from the inside of the cylinder head 7, achieving the effect of quick disassembly.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum kneading machine for silicone rubber production, comprising a base (1), characterized in that: A controller (2) is fixedly connected to the top of the base (1), a fixed frame (3) is fixedly connected to the top of the base (1), a kneading cylinder (4) is fixedly connected inside the fixed frame (3), a discharge port (5) is opened at the bottom of the kneading cylinder (4), a stirring device (6) is provided inside the kneading cylinder (4), a cylinder cover (7) is slidably connected inside the kneading cylinder (4), and a floating component is provided at the bottom of the cylinder cover (7). The floating assembly includes a telescopic rod (9), one end of which is fixedly connected to the bottom of the cylinder head (7), and the other end of which is fixedly connected to a pressure plate (11). A spring-loaded assembly is provided on the outer wall of the telescopic rod (9). A sealing strip (8) is provided inside the cylinder head (7), and a sealing strip (12) is provided inside the pressure plate (11). The outer wall of the sealing strip (8) is in contact with the inner wall of the kneading cylinder (4), and the outer wall of the sealing strip (12) is in contact with the inside of the kneading cylinder (4). A quick-release assembly is provided inside the cylinder head (7).

2. The vacuum kneading machine for producing silicone rubber according to claim 1, characterized in that: The rebound assembly includes a spring (10), one end of which is fixedly connected to the bottom of the cylinder head (7), and the other end of which is fixedly connected to the top of the pressure plate (11).

3. The vacuum kneading machine for producing silicone rubber according to claim 1, characterized in that: The quick-release assembly includes a sliding post (14) and a locking block (17). The locking block (17) is internally fixedly connected to the outer wall of the sliding post (14), and a rotating block (15) is fixedly connected to one end of the sliding post (14).

4. The vacuum kneader for producing silicone rubber according to claim 3, characterized in that: The outer wall of the sliding column (14) is rotatably connected to a hollow column (13), and the outer wall of the hollow column (13) is slidably connected to the inside of the cylinder head (7).

5. The vacuum kneader for producing silicone rubber according to claim 4, characterized in that: The outer wall of the sliding column (14) is fixedly connected to a limiting ring two (19), and the outer wall of the limiting ring two (19) is slidably connected inside the hollow column (13).

6. The vacuum kneader for producing silicone rubber according to claim 5, characterized in that: The hollow column (13) is rotatably connected to a limiting ring (16), and the outer wall of the sliding column (14) is slidably connected to the limiting ring (16).

7. The vacuum kneader for producing silicone rubber according to claim 3, characterized in that: The kneading cylinder (4) is fixedly connected to a chuck (20), and the chuck (20) has a chuck hole (21) inside. The outer wall of the sliding column (14) is slidably connected to the inside of the chuck (20), and the chuck block (17) and the chuck hole (21) are engaged.

8. The vacuum kneader for producing silicone rubber according to claim 6, characterized in that: The outer wall of the sliding column (14) is provided with a second spring (18). One end of the second spring (18) is fixedly connected to the outer wall of the second limiting ring (19), and the other end of the second spring (18) is fixedly connected to the outer wall of the first limiting ring (16).

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