Ethylene propylene diene monomer sponge production raw material mixing and stirring device

Abstract

The utility model discloses an ethylene propylene diene monomer sponge production raw material mixing and stirring device which comprises a stirring shaft rotationally arranged in a stirring box, a plurality of stirring rods which are spirally distributed at equal intervals are fixedly installed on the stirring shaft, and sharp protrusions are fixedly installed on the end faces of the stirring rods. The counter weight frame is arranged in the stirring box and is pushed by the stirring rod to vertically reciprocate. According to the ethylene propylene diene monomer sponge production raw material mixing and stirring device provided by the utility model, the resistance during stirring is reduced through the sharp bulges, and the stirring rods enable the raw materials to be stirred in a wriggling and turning-up manner in the rotating process, so that the raw materials can be continuously pushed back along the direction of the stirring shaft in the stirring box; furthermore, a larger-area stirring effect is provided on the basis of original circumferential stirring, and in the process, a counterweight frame carries a counterweight block to vertically extrude and push raw materials, so that the raw materials also have vertical downward pressing and upward lifting functions, the raw materials have various stirring effects, and the stirring efficiency of the raw materials is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of mixing equipment for the production of EPDM rubber sponge, and more specifically to a mixing and stirring device for raw materials in the production of EPDM rubber sponge. Background Technology

[0002] In the production process of EPDM rubber sponge, the rubber raw materials need to be placed in a container and stirred. Sulfur and vulcanization accelerators also need to be added during the process, and the mixture needs to be stirred at a certain temperature to improve the processability and final properties of the rubber.

[0003] According to the public announcement number: CN219256103U, the public announcement date: 2023-06-27, a EPDM rubber mixing device was disclosed, including a tank with a mixing chamber, and a mixing shaft with multiple mixing rods installed in the mixing chamber, so that the raw materials are mixed in the mixing chamber.

[0004] In the prior art, including the aforementioned patent, due to the poor self-adhesion of EPDM rubber raw materials, the temperature needs to be increased during the stirring process to make the raw materials viscous and easy to mix. The traditional stirring method also requires increasing the stirring and mixing time in order to evenly mix the added powder into the raw materials. Therefore, the processing of raw material mixing requires more resources and time, prolonging the processing cycle and thus reducing processing efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a mixing and stirring device for raw materials in the production of EPDM rubber sponge, aiming to solve the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A mixing and stirring device for raw materials in the production of EPDM rubber sponge includes a mixing box with a cover, and a stirring shaft rotating in the mixing box. Multiple stirring rods are fixedly installed on the stirring shaft in a spiral and equidistant arrangement, and pointed protrusions are fixedly installed on the end faces of the stirring rods.

[0008] It also includes a counterweight frame installed in the mixing tank and reciprocated vertically by being pushed by the mixing rod, wherein the counterweight frame is provided with a counterweight block that slides on the inner side wall of the mixing tank.

[0009] Preferably, the end of the stirring rod is further provided with an arcuate protrusion connected to the pointed protrusion.

[0010] Preferably, the counterweight frame has an opening that is pushed against by an arc protrusion.

[0011] Preferably, an arc frame hinged to the open end is fixedly installed on the counterweight block.

[0012] Preferably, a guide rod that slides through the box cover is fixedly installed on the counterweight frame.

[0013] Preferably, a top block is fixedly installed at the upper end of the guide rod, and an elastic element is fixedly installed between the top block and the box cover.

[0014] Preferably, the elastic element is a tension spring.

[0015] Preferably, the box cover is provided with a feed inlet.

[0016] Preferably, the weight of the counterweight is greater than the sum of the elastic potential energy of the elastic element and the resistance to movement of the counterweight.

[0017] Preferably, the counterweight is a round block of alloy metal.

[0018] In the above technical solution, the EPDM rubber sponge production raw material mixing and stirring device provided by this utility model has the following beneficial effects: the pointed protrusions reduce the resistance during stirring, and at the same time, they can cut and stir the raw materials. During the rotation of multiple stirring rods, the stirring of the raw materials presents an axial creeping and tumbling state, which allows the raw materials to be continuously pushed and retracted along the stirring axis in the mixing box. This provides a larger area of ​​tumbling effect on the basis of the original circumferential stirring, thereby improving the stirring efficiency of the raw materials. During the process, the stirring rods push and release the counterweight frame, causing the counterweight frame to carry the counterweight block to vertically squeeze and push the raw materials. This allows the raw materials to be spirally stirred and pushed while also being vertically pressed down and lifted, thereby giving the raw materials a variety of stirring effects, improving the tumbling and stirring efficiency of the raw materials, and shortening the raw material mixing time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the assembly of multiple guide rods above the mixing tank and the tank cover provided in an embodiment of this utility model;

[0021] Figure 2 This is a side cross-sectional view of the mixing tank provided in an embodiment of the present utility model;

[0022] Figure 3 for Figure 2 Enlarged view of point A;

[0023] Figure 4 A schematic diagram of the stirring shaft, multiple stirring rods, and a single counterweight frame provided in an embodiment of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Mixing tank; 11. Tank cover; 12. Feed inlet; 2. Mixing shaft; 21. Mixing rod; 22. Pointed protrusion; 23. Arc protrusion; 3. Counterweight frame; 31. Opening; 32. Guide rod; 33. Top block; 34. Elastic element; 4. Counterweight block; 41. Arc frame. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-4 As shown, a mixing and stirring device for raw materials of EPDM rubber sponge production includes a mixing box 1 with a box cover 11, and a stirring shaft 2 rotating in the mixing box 1. Multiple stirring rods 21 are fixedly installed on the stirring shaft 2 in a spiral and equidistant arrangement. A pointed protrusion 22 is fixedly installed on the end face of the stirring rod 21.

[0028] It also includes a counterweight frame 3 installed in the mixing tank 1 and pushed vertically back and forth by the stirring rod 21, with a counterweight block 4 sliding on the inner wall of the mixing tank 1 on the counterweight frame 3.

[0029] Specifically, the mixing tank 1 has a discharge port on its side, and the side of the mixing tank 1 opposite to the discharge port is equipped with a motor that can be detached by bolts and nuts. The mixing shaft 2 is detachably connected to the motor output shaft by a coupling. The connection method and the discharge opening and closing method are existing technologies and will not be described in detail here.

[0030] Furthermore, the cross-section of the pointed protrusion 22 is an isosceles triangle (the pointed protrusion 22 as a whole is a triangular prism shape), and the apex is oriented towards the direction of rotation of the stirring rod 21. Figure 2 (clockwise direction in the middle), the counterweight frame 3 is an alloy metal frame, which has anti-corrosion function and can also have the gravity to return to its downward position.

[0031] The pointed head 22 actively stirs the raw materials, reducing the resistance during stirring. It can also cut and stir the raw materials. During the rotation of multiple stirring rods 21, the stirring of the raw materials presents an axial creeping and tumbling state, which allows the raw materials to be continuously pushed and retreated along the direction of the stirring shaft 2 in the mixing box 1. This provides a larger tumbling effect on the basis of the original circumferential stirring, improving the stirring efficiency of the raw materials. During the process, the stirring rods 21 push and release the counterweight frame 3, causing the counterweight frame 3 to carry the counterweight block 4 to vertically squeeze and push the raw materials. This allows the raw materials to be spirally stirred and pushed while also being vertically pressed down and lifted, thus giving the raw materials a variety of stirring effects, improving the tumbling and stirring efficiency of the raw materials, and shortening the mixing time of the raw materials.

[0032] As a further embodiment of this utility model, the end of the stirring rod 21 is also provided with an arcuate protrusion 23 connected to the pointed protrusion 22.

[0033] The arc-shaped protrusion 23 allows it to contact the raw material earlier than the pointed protrusion 22. The arc-shaped surface guides the raw material on the inclined surface of the pointed protrusion 22, reducing the stirring resistance and providing good inertia. This, in turn, impacts the thickened and clumped raw material on the inner wall of the mixing tank 1, enhancing the stirring effect.

[0034] As another embodiment further provided in this utility model, the counterweight frame 3 is provided with an opening 31 that is pushed against by the arc protrusion 23.

[0035] Specifically, the opening 31 faces downwards, and the lower end of the counterweight frame 3 is inverted U-shape.

[0036] When the arc protrusion 23 rotates upward, it actively contacts the opening 31 and connects the two to lift the counterweight frame 3 upward, causing the counterweight frame 3 to store energy at a high level. Then the arc protrusion 23 slides off the opening 31 and waits for the next docking. At the same time, the upper end of the counterweight frame 3 can be used to vertically squeeze and cut the raw material.

[0037] As another embodiment further provided by this utility model, an arc frame 41 hinged to the end of the opening 31 is fixedly installed on the counterweight 4.

[0038] Specifically, a torsion spring is provided at the hinge position of the arc frame 41, and the installation method of the torsion spring is existing technology, which will not be described in detail here. The two ends of the torsion spring press against the end of the opening 31 and the arc frame 41 respectively, so as to cooperate with the counterweight 4 to slide relative to the inner wall of the mixing tank 1 under its own weight and the restoring force of the torsion spring.

[0039] The arc frame 41 can be adapted to the curved position of the inner wall of the mixing tank 1, and slide against the inner wall of the mixing tank 1 during the downward movement of the counterweight 4, thereby causing the arc frame 41 to rotate to facilitate the downward reset of the counterweight 4.

[0040] As another embodiment of this utility model, a guide rod 32 that slides through the box cover 11 is fixedly installed on the counterweight frame 3.

[0041] Specifically, multiple guide rods 32 are staggered on the cover 11.

[0042] The vertical sliding of multiple guide rods 32 facilitates the regular up-and-down cutting of raw materials by multiple counterweight frames 3, while also ensuring the stability of the vertical movement of the counterweight frames 3.

[0043] As another embodiment of this utility model, a top block 33 is fixedly installed on the upper end of the guide rod 32, and an elastic element 34 is fixedly installed between the top block 33 and the box cover 11.

[0044] Specifically, the top block 33 has rounded corners on its upper surface and is integrally formed on the guide rod 32.

[0045] The top block 33 provides a connection limit for the elastic element 34, and the elastic element 34 ensures the ability of the counterweight frame 3 to reset and move downward.

[0046] As another embodiment further provided in this utility model, the elastic element 34 is specifically a tension spring.

[0047] Specifically, the tension spring is arranged in a ring on the outside of the guide rod 32, and the tension spring is detachably installed on the top block 33 and the box cover 11 using washers, covers, bolts and nuts.

[0048] The ring-shaped tension spring design makes the vertical movement of the guide rod 32 more stable, which corresponds to the counterweight frame 3 having a more stable ability to flip up and down.

[0049] As another embodiment provided in this utility model, a feed inlet 12 is provided on the box cover 11.

[0050] The feed inlet 12 makes it easier to put large pieces of raw material into the mixing tank 1, and the feed inlet 12 is located at the end of the peristaltic pushing of the mixing rod 21, thereby making the raw material mixing process more complete and efficient.

[0051] As another embodiment further provided in this utility model, the weight of the counterweight 4 is greater than the sum of the elastic potential energy of the elastic element 34 and the resistance to movement of the counterweight 4.

[0052] The combined gravity of the counterweight 4 and the counterweight frame 3 ensures the smooth repositioning and pressing of the raw material, preventing the material from generating resistance and interfering with vertical movement.

[0053] As another embodiment provided in this utility model, the counterweight 4 is specifically an alloy metal round block.

[0054] The circular metal block reduces the resistance during the downward movement of counterweight 4, resulting in a stronger turning effect on the raw materials.

[0055] Working principle: The pointed head 22 actively stirs the raw material, reducing the resistance during stirring. At the same time, it can also cut and stir the raw material. During the rotation of multiple stirring rods 21, the stirring of the raw material presents an axial creeping and tumbling state, which allows the raw material to be continuously pushed and retracted along the direction of stirring shaft 2 in the mixing box 1. This provides a larger tumbling effect on the basis of the original circumferential stirring. During the process, the stirring rods 21 push and release the counterweight frame 3, causing the counterweight frame 3 to carry the counterweight block 4 to vertically squeeze and push the raw material under the reset action of the elastic element 34. This allows the raw material to be spirally stirred and pushed while also being vertically pressed down and lifted.

[0056] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A ternary ethylene propylene rubber sponge production raw material mixing and stirring device, comprising a stirring tank (1) provided with a tank cover (11), characterized in that, It also includes a stirring shaft (2) rotating in a mixing tank (1), on which a plurality of stirring rods (21) are fixedly installed in a spiral and equidistant arrangement, and a pointed protrusion (22) is fixedly installed on the end face of the stirring rod (21). It also includes a counterweight frame (3) set in the mixing tank (1) and pushed vertically back and forth by the stirring rod (21), wherein a counterweight block (4) is provided on the counterweight frame (3) and slides on the inner side wall of the mixing tank (1).

2. The mixing and stirring device for raw materials of production of EPDM sponge according to claim 1, characterized in that, The end of the stirring rod (21) is also provided with an arc protrusion (23) connected to the pointed protrusion (22).

3. The mixing and stirring device for raw materials of production of EPDM sponge according to claim 2, characterized in that, The counterweight frame (3) has an opening (31) that is pushed by the arc protrusion (23).

4. The mixing and stirring device for raw materials of production of EPDM sponge according to claim 3, characterized in that, An arc frame (41) hinged to the end of the opening (31) is fixedly installed on the counterweight (4).

5. The mixing and stirring device for raw materials of production of EPDM sponge according to claim 3, characterized in that, The counterweight frame (3) is fixedly installed with a guide rod (32) that slides through the box cover (11).

6. The mixing and stirring device for raw materials of production of EPDM sponge according to claim 5, characterized in that, A top block (33) is fixedly installed on the upper end of the guide rod (32), and an elastic element (34) is fixedly installed between the top block (33) and the box cover (11).

7. The mixing and stirring device for raw materials of production of EPDM sponge according to claim 6, characterized in that, The elastic element (34) is specifically a tension spring.

8. The mixing and stirring device for raw materials of production of EPDM sponge according to claim 6, characterized in that, The box cover (11) is provided with a feed inlet (12).

9. The mixing and stirring device for raw materials of production of EPDM sponge according to claim 6, characterized in that, The weight of the counterweight (4) is greater than the sum of the elastic potential energy of the elastic element (34) and the resistance to movement of the counterweight (4).

10. The mixing and stirring device for raw materials in the production of EPDM rubber sponge according to claim 9, characterized in that, The counterweight (4) is specifically an alloy metal round block.

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