Mixing mechanism for TPV elastomer raw materials

Abstract

The utility model relates to a mixing mechanism for TPV (thermoplastic vulcanizate) elastomer raw materials, which comprises a rack, a stirring hopper is arranged on the rack, a stirring component for stirring materials in the stirring hopper is arranged on the stirring hopper, a filter screen is arranged in the stirring hopper in a sliding manner, a rolling component for rolling agglomerates is arranged in the stirring hopper, and the filter screen is arranged on the stirring component. The rolling assembly is located above the filter screen, and a vibration motor is arranged below the filter screen; the stirring device has the advantages that materials can be effectively stirred, and uneven mixing of the materials caused by caking is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic production, and specifically relates to a mixing mechanism for TPV elastomer raw materials. Background Art

[0002] Thermoplastic Vulcanizate (TPV), as a new type of polymer material, has been widely used in many fields such as automobiles, household appliances, construction, and electronics since it was developed by Monsanto Company in the United States in the late 1970s, due to its excellent physical properties and processing performance. TPV materials combine the characteristics of vulcanized rubber such as heat resistance, compression set resistance, and low compression permanent deformation, as well as the easy processability and recyclability of thermoplastic plastics, greatly expanding the application scope of materials.

[0003] In the production process of TPV, melting and blending the mixture of PP and EPDM is a crucial step. During this process, a crosslinking agent needs to be added to promote the vulcanization of EPDM, and a high-intensity shear force is applied through mechanical equipment such as a screw machine, so that the vulcanized EPDM rubber particles are uniformly dispersed in the PP matrix in a micron-sized (even less than 1 micron) size. However, in the mixing stage before the raw materials enter the screw extruder, the existing mixing equipment faces significant technical challenges.

[0004] However, in the production process of TPV materials, an issue that cannot be ignored is the pretreatment of raw materials. Some raw materials are difficult to be quickly dispersed when directly put into the mixing barrel due to their large volume or caking phenomenon, which not only reduces the mixing efficiency but also may affect the stability of subsequent processes and product quality. Most of the current mixing devices on the market are relatively simple in design and mainly rely on the rotation of stirring blades to achieve mixing. In the case where the raw materials are not effectively pretreated (such as being dispersed or chopped), it is often difficult to achieve an ideal mixing effect. During the mixing process, the contact between raw materials is insufficient, and the mixing uniformity is difficult to guarantee, thus having an adverse impact on the entire production process.

[0005] Therefore, in order to improve the production efficiency and quality stability of TPV materials, it is urgent to develop a mixing device that can effectively pretreat raw materials to ensure that the raw materials have reached a certain dispersed state before entering the mixing barrel, thereby improving the mixing efficiency and mixing uniformity. Summary of the Utility Model

[0006] In order to improve the above problems, the utility model provides a mixing mechanism for TPV elastomer raw materials, and the specific technical solutions are as follows:

[0007] A mixing mechanism for TPV elastomer raw materials, including a frame, a stirring hopper is provided on the frame, a stirring assembly for stirring the materials in the stirring hopper is provided on the stirring hopper, a filter screen is slidably arranged in the stirring hopper, a rolling assembly for rolling the lumps is arranged in the stirring hopper, the rolling assembly is located above the filter screen, and a vibration motor is arranged below the filter screen.

[0008] Put the raw materials into the stirring hopper, filter the lumpy materials through the filter screen, use the rolling assembly to roll the lumps, and stir the materials entering the stirring hopper through the stirring assembly, so as to effectively stir the materials and avoid uneven mixing of the materials due to lumping.

[0009] In a specific feasible embodiment, the rolling assembly includes a power motor arranged in the stirring hopper, a rotating rod is coaxially arranged on the motor shaft of the power motor, and a plurality of rolling rods are arranged on the side wall of the rotating rod, and the rolling rods are arranged above the filter screen.

[0010] In a specific feasible embodiment, the filter screen includes an annular net arranged on the inner side wall of the stirring hopper, a conical net is arranged on the inner side wall of the annular net, the conical net protrudes towards the top of the stirring hopper, the rolling rods are arranged along the inclination angle of the conical net, and a driven rod is arranged at one end of the rolling rod far away from the rotating rod.

[0011] When the raw materials fall on the conical net, the non-lumpy raw materials first fall into the stirring hopper, and the lumpy raw materials are on the conical net and the annular net. The power motor drives the rotating rod, the rolling rods and the driven rod to rotate, so that the raw materials can be rolled, and the raw materials can slide along one side of the annular net, avoiding concentrating in the central area of the conical net, resulting in the rolling rods being unable to roll the raw materials and the raw materials not being fully utilized.

[0012] In a specific feasible embodiment, a ring groove is arranged on the inner side wall of the stirring hopper, the annular net extends into the ring groove, and a plurality of support springs are arranged along the inner side wall of the ring groove, and the plurality of support springs are evenly distributed along the circumference of the ring groove.

[0013] In a specific feasible embodiment, a rubber gasket is arranged between the top wall of the ring groove and the annular net.

[0014] Use the rubber gasket to seal the gap between the annular net and the groove wall of the ring groove to avoid raw materials remaining in the ring groove.

[0015] In a specific feasible embodiment, the stirring assembly includes a driving motor arranged on the stirring hopper, a stirring rod is coaxially arranged on the motor shaft of the driving motor, the stirring rod extends into the stirring hopper, and a plurality of stirring blades are arranged on one side of the stirring rod extending into the stirring hopper.

[0016] Beneficial technical effects of the utility model:

[0017] 1. By setting up the filter screen and the rolling component, the lumps in the raw materials can be effectively filtered and rolled to ensure that the materials entering the mixing bucket are in a loose state. Then, through the sufficient stirring of the stirring component, the mixing uniformity of the materials is greatly improved, avoiding the problem of uneven mixing caused by lumps.

[0018] 2. The design of the conical net allows the raw materials to slide down along its inclined surface, avoiding excessive accumulation of raw materials in the central area of ​​the conical net, thereby ensuring that the rolling rod can fully contact and roll all the raw materials, thereby improving the utilization rate of the materials;

[0019] 3. The annular groove on the inner wall of the mixing bucket is tightly connected to the annular net through a supporting spring and a rubber sealing pad, which effectively prevents the raw materials from being left in the annular groove and reduces the waste of raw materials and possible pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a mixing mechanism for TPV elastomer raw materials according to an embodiment of the utility model.

[0021] Figure 2 This is a cross-sectional view showing the internal structure of the mixing bucket.

[0022] Explanation of the reference numerals in the accompanying drawings: 1. Frame; 2. Mixing bucket; 3. Open mouth; 4. Cover plate; 5. Discharge port; 6. Mixing assembly; 7. Filter screen; 8. Rolling assembly; 9. Vibration motor; 10. Drive motor; 11. Mixing rod; 12. Mixing blade; 13. Annular net; 14. Annular groove; 15. Support spring; 16. Rubber sealing pad; 17. Conical net; 18. Bracket; 19. Power motor; 20. Rotating rod; 21. Rolling rod; 22. Driven rod; 23. Extruded foam sleeve. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-2 The utility model is described in further detail.

[0024] Reference Figure 1 and Figure 2 A mixing mechanism for TPV elastomer raw materials includes a frame 1, a stirring bucket 2 is provided on the frame 1, an opening 3 is provided on the top of the stirring bucket 2, a cover plate 4 for closing the opening 3 is provided on the stirring bucket 2, a feed port is provided on the cover plate 4, a baffle for sealing the feed port is hinged on the cover plate 4, a discharge port 5 is provided on the bottom wall of the stirring bucket 2, a stirring component 6 for stirring the material in the stirring bucket 2 is provided on the stirring bucket 2, a filter screen 7 is slidably provided in the stirring bucket 2, a rolling component 8 for rolling agglomerates is provided in the stirring bucket 2, the rolling component 8 is located above the filter screen 7, and a vibration motor 9 is provided below the filter screen 7.

[0025] The stirring assembly 6 includes a driving motor 10 arranged on the stirring hopper 2. A stirring rod 11 is coaxially arranged on the motor shaft of the driving motor 10. The stirring rod 11 is vertically arranged and extends into the stirring hopper 2. A plurality of stirring blades 12 are arranged on one side of the stirring rod 11 extending into the stirring hopper 2.

[0026] The filter screen 7 includes an annular net 13 arranged on the inner side wall of the stirring hopper 2. A ring groove 14 is arranged on the inner side wall of the stirring hopper 2. The annular net 13 extends into the ring groove 14. A plurality of support springs 15 are arranged along the inner side wall of the ring groove 14. The plurality of support springs 15 are evenly distributed along the circumferential direction of the ring groove 14. A rubber gasket 16 is arranged between the top wall of the ring groove 14 and the annular net 13.

[0027] A conical net 17 is arranged on the inner side wall of the annular net 13. The conical net 17 protrudes towards the top of the stirring hopper 2. The inner diameter of the conical net 17 increases from the side close to the opening 3 to the side far from the opening 3. The vibration motor 9 is located at the bottom of the conical net 17 and at the central part of the conical net 17.

[0028] Refer to Figure 2 , a support 18 is arranged in the stirring hopper 2 and above the conical net 17. The rolling assembly 8 includes a power motor 19 arranged on the support 18. A rotating rod 20 is coaxially arranged on the motor shaft of the power motor 19. The axis of the rotating rod 20 is collinear with the axis of the stirring rod 11. A plurality of rolling rods 21 are arranged on the side wall of the rotating rod 20. The plurality of rolling rods 21 are evenly distributed along the circumferential direction of the stirring hopper 2. The rolling rods 21 are arranged above the conical net 17. The rolling rods 21 are arranged along the inclination angle of the conical net 17. A driven rod 22 is arranged at the end of the rolling rod 21 far from the rotating rod 20. The driven rod 22 rotates on the annular net 13. Extrusion foam sleeves 23 are arranged on both the rolling rods 21 and the driven rods 22. The extrusion foam sleeves 23 are extruded on the filter screen 7.

[0029] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A mixing mechanism for TPV elastomer raw materials, characterized in that: The invention comprises a frame (1), a stirring bucket (2) is arranged on the frame (1), a stirring assembly (6) for stirring materials in the stirring bucket (2) is arranged on the stirring bucket (2), a filter screen (7) is slidably arranged in the stirring bucket (2), a rolling assembly (8) for rolling lumps is arranged in the stirring bucket (2), the rolling assembly (8) is located above the filter screen (7), and a vibration motor (9) is arranged below the filter screen (7).

2. A mixing mechanism for TPV elastomer raw materials according to claim 1, characterized in that: The rolling assembly (8) comprises a power motor (19) arranged in the mixing bucket (2); a rotating rod (20) is coaxially arranged on the motor shaft of the power motor (19); a plurality of rolling rods (21) are arranged on the side wall of the rotating rod (20); and the rolling rods (21) are arranged above the filter screen (7).

3. A mixing mechanism for TPV elastomer raw materials according to claim 2, characterized in that: The filter screen (7) comprises an annular screen (13) arranged on the inner side wall of the mixing bucket (2), a conical screen (17) is arranged on the inner side wall of the annular screen (13), the conical screen (17) protrudes toward the top of the mixing bucket (2), the rolling rod (21) is arranged along the inclination angle of the conical screen (17), and a driven rod (22) is arranged at one end of the rolling rod (21) away from the rotating rod (20).

4. A mixing mechanism for TPV elastomer raw materials according to claim 3, characterized in that: An annular groove (14) is provided on the inner wall of the mixing bucket (2), the annular net (13) extends into the annular groove (14), a plurality of supporting springs (15) are provided on the upper edge of the inner wall of the annular groove (14), and the plurality of supporting springs (15) are evenly distributed along the circumference of the annular groove (14).

5. A mixing mechanism for TPV elastomer raw materials according to claim 4, characterized in that: A rubber sealing pad (16) is provided between the top wall of the annular groove (14) and the annular net (13).

6. A mixing mechanism for TPV elastomer raw materials according to claim 1, characterized in that: The stirring assembly (6) comprises a driving motor (10) arranged on the stirring bucket (2); a stirring rod (11) is coaxially arranged on the motor shaft of the driving motor (10); the stirring rod (11) extends into the stirring bucket (2); and a plurality of stirring blades (12) are arranged on one side of the stirring rod (11) extending into the stirring bucket (2).

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