A granulation apparatus for preparing polypropylene composite materials

Abstract

This utility model provides a granulation device for preparing polypropylene composite materials, belonging to the field of polypropylene composite material granulation technology. It includes an extruder and a pelletizer, and further includes a cooling assembly. The cooling assembly is located on one side of the extruder and includes a cooling water tank disposed between the extruder and the pelletizer. Two baffles are installed inside the cooling water tank, and a stainless steel heating plate is installed at the bottom of the cooling water tank. By setting up the cooling assembly, firstly, by inserting two baffles inside the cooling water tank, the inner space of the cooling water tank is divided into three independent areas using the cooperation of the two baffles. High-temperature cooling water is used to pre-cool the material strip to avoid structural instability caused by sudden cooling. Then, deep cooling is achieved through stepped cooling, reducing the temperature difference between the inside and outside of the material strip, reducing the internal stress generated inside the material strip, and improving the granulation quality of the polypropylene composite material granulation device.

Description

Technical Field

[0001] This utility model relates to the field of polypropylene composite material granulation technology, and in particular to a granulation device for preparing polypropylene composite materials. Background Technology

[0002] A granulation device for preparing polypropylene composite materials is used to mix, melt, and plasticize polypropylene matrix with fillers, additives, and reinforcing materials, and process it into uniform granular semi-finished products. These granules can be directly used in subsequent molding processes such as injection molding, extrusion, and blow molding to produce end products such as automotive parts, appliance housings, and packaging materials.

[0003] However, in practical applications, existing granulation equipment for polypropylene composite material preparation typically uses a single rectangular cooling water tank. When the polypropylene melt is directly immersed in low-temperature cold water after being extruded from the die, the melt will experience a huge temperature difference due to the sudden solidification of the surface and the slow contraction of the interior. This causes irreversible internal stress to be generated inside the melt, which may lead to deformation of the pellets during subsequent pelletizing due to the release of internal stress, which is not conducive to improving the quality of the granulated product.

[0004] Therefore, this application provides a granulation apparatus for preparing polypropylene composite materials to meet the requirements. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and to propose a granulation device for preparing polypropylene composite materials.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a granulation device for preparing polypropylene composite materials, comprising an extruder and a pelletizer, and further comprising:

[0007] A cooling assembly is located on one side of the extruder. The cooling assembly includes a cooling water tank disposed between the extruder and the pelletizer. Two baffles are disposed inside the cooling water tank. A stainless steel heating plate is disposed at the bottom of the cooling water tank.

[0008] An adjustment assembly is located on top of the cooling assembly and is used to adjust the position of the baffle inside the cooling water tank. The adjustment assembly includes a main movable plate connected to the top of the baffle. A side plate is connected to the cooling water tank on the side near the main movable plate. A threaded column is connected to the side of the main movable plate on the side near the side plate. The main movable plate is slidably connected to the side plate through the threaded column.

[0009] Furthermore, as shown in the figure, heat insulation plates are provided on both sides of the baffle.

[0010] The beneficial effect of adopting the above-mentioned further solution is that it helps to ensure the stability of the cooling water temperature in each area.

[0011] Furthermore, a rubber pad is provided on the side of the baffle that is close to the inside of the cooling water tank.

[0012] The beneficial effect of adopting the above-mentioned further solution is that filling the gap between the cooling water tank and the baffle helps to improve the sealing between each area.

[0013] Furthermore, a secondary movable plate is provided inside the cooling water tank on the side near the baffle. The secondary movable plates are arranged in an array inside the cooling water tank, and a limit post is connected to the bottom of the secondary movable plate.

[0014] The beneficial effect of adopting the above-mentioned further solution is that it keeps the material strip inside the cooling water at all times, ensuring that the cooling water continuously cools the material strip.

[0015] Furthermore, a sleeve is rotatably provided on the top of the main movable plate.

[0016] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the lifting of the material strip inside the cooling water, ensuring that it can pass smoothly through the baffle and avoiding the baffle from blocking the movement of the material strip.

[0017] Furthermore, a bracket is connected to the side of the cooling water tank near the stainless steel heating plate, and the stainless steel heating plate is slidably connected to the bracket.

[0018] The beneficial effect of adopting the above-mentioned further solution is that it allows the stainless steel heating plate to be pushed, making it easier to adjust the heating area of ​​the stainless steel heating plate according to changes in the area.

[0019] Furthermore, a nut is threaded onto the threaded post, and the threaded post is fixedly connected to the side plate by the nut.

[0020] The beneficial effect of adopting the above-mentioned further solution is that it increases the friction between the nut and the side plate, making it easier to fix the threaded column and the main movable plate at a designated position on the cooling water tank.

[0021] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0022] 1. By setting up a cooling assembly, two baffles are first inserted inside the cooling water tank. The cooperation of the two baffles divides the inner space of the cooling water tank into three independent areas. Stainless steel electric heating plates are installed at the bottom of the cooling water tank corresponding to the three areas. Through the independent heating function of the stainless steel electric heating plates, precise temperature control of the cooling water in the three areas is achieved. When the extruder extrudes the molten material strip, it first enters the first area with a higher temperature. The high-temperature cooling water pre-cools the material strip, allowing it to complete the initial shaping at a higher temperature, avoiding structural instability caused by sudden cooling. Then, the material strip gradually enters the subsequent two areas with progressively lower temperatures. Through step-by-step cooling, deep cooling is achieved, reducing the temperature difference between the inside and outside of the material strip, keeping the temperature gradient between the inside and outside of the granules gentle, and reducing the internal stress generated inside the material strip. This solves the problem of irreversible internal stress easily forming inside the material strip in traditional cooling methods, which leads to deformation of the granules due to the release of internal stress during subsequent pelletizing. This improves the pelletizing quality of the pelletizing device for preparing polypropylene composite materials.

[0023] 2. By setting an adjustment component, after the baffle is placed inside the cooling water tank, the threaded column and the slide groove of the side plate are slidably connected, so that the baffle can move along the slide groove through the threaded column, pushing the main movable plate and driving the baffle to adjust its position inside the cooling water tank along the slide groove. By changing the position of the baffle, the space size of the three cooling zones in the cooling water tank can be flexibly changed, thereby adjusting the cooling time and temperature gradient of each zone. This allows the production line to adapt to the corresponding cooling curve according to the cooling requirements of different polypropylene composite material formulations, improving the operational flexibility of the granulation device for polypropylene composite material preparation. Attached Figure Description

[0024] Figure 1 This is a front view of a granulation apparatus for preparing polypropylene composite materials according to the present invention;

[0025] Figure 2 This is a structural diagram of the cooling component in a granulation device for preparing polypropylene composite materials according to this utility model;

[0026] Figure 3 This is a split view of the baffle in a granulation device for preparing polypropylene composite materials according to this utility model;

[0027] Figure 4 This is a structural diagram of the auxiliary movable plate in a granulation device for preparing polypropylene composite materials according to this utility model;

[0028] Figure 5 This is a structural diagram of the support structure in a granulation device for preparing polypropylene composite materials according to this utility model.

[0029] Figure Labels

[0030] 1. Extruder;

[0031] 2. Cooling components; 21. Cooling water tank; 22. Baffle; 23. Heat insulation plate; 24. Rubber pad; 25. Secondary movable plate; 26. Sleeve; 27. Limiting post; 28. Bracket; 29. ​​Stainless steel heating plate;

[0032] 3. Adjustment assembly; 31. Main moving plate; 32. Side plate; 33. Threaded column; 34. Nut;

[0033] 4. Pelletizer. Detailed Implementation

[0034] 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.

[0035] like Figures 1-5 As shown, this utility model provides a technical solution: a granulation device for preparing polypropylene composite materials, including an extruder 1 and a pelletizer 4, and further comprising:

[0036] like Figures 1-3 As shown, the cooling assembly 2 is located on one side of the extruder 1. The cooling assembly 2 includes a cooling water tank 21 disposed between the extruder 1 and the pelletizer 4. The cooling water tank 21 is provided with baffles 22 inside, and there are two baffles 22 inside the cooling water tank 21. A stainless steel electric heating plate 29 is provided at the bottom of the cooling water tank 21.

[0037] like Figures 1-3As shown, the adjusting component 3 is placed on top of the cooling component 2 and is used to adjust the position of the baffle 22 inside the cooling water tank 21. The adjusting component 3 includes a main movable plate 31 connected to the top of the baffle 22. A side plate 32 is connected to the side of the cooling water tank 21 near the main movable plate 31. A threaded column 33 is connected to the side of the main movable plate 31 near the side plate 32. The main movable plate 31 is slidably connected to the side plate 32 through the threaded column 33. By inserting the baffle 22 into the interior of the cooling water tank 21, the two baffles 22 cooperate to divide the inner side of the cooling water tank 21 into three areas. Then, a stainless steel electric heating plate 29 is installed at the bottom of the cooling water tank 21 to heat the three areas respectively. At the same time, a temperature sensor is installed inside the cooling water tank 21 to monitor the temperature of the cooling water in real time, so that the temperature of the cooling water in the three areas decreases sequentially from the extruder 1 to the pelletizer 4. After the material strip is extruded, it is pre-cooled with high-temperature water to allow it to undergo initial shaping in a higher temperature zone before gradually entering a lower temperature zone for deep cooling. This smooths the temperature gradient between the inside and outside of the granules, reducing internal stress and solving the problem of irreversible internal stress generated inside the material strip, which could lead to deformation during subsequent pelletizing due to stress release. This improves the pelletizing quality of the granulation device for polypropylene composite material preparation. Furthermore, by welding the main moving plate 31 to the baffle 22 and the side plates 32 to the top sides of the extruder 1, and creating grooves on the side plates 32 that match the threaded columns 33, the baffle 22 is placed inside the cooling water tank 21. The threaded columns 33 and the side plates 32 are slidably connected, and the main moving plate 31 is pushed to adjust the position of the baffle 22 inside the cooling water tank 21. This allows the production line to adjust the cooling curve according to different composite material formulations, improving the flexibility of the granulation device for polypropylene composite material preparation.

[0038] Furthermore, such as Figure 3 As shown, heat insulation plates 23 are provided on both sides of the baffle 22. By attaching the heat insulation plates 23 to both sides of the baffle 22, the heat transfer between the cooling water in the two adjacent areas is reduced, which helps to ensure the stability of the cooling water temperature in each area.

[0039] Furthermore, such as Figure 3 As shown, a rubber pad 24 is provided on the side of the baffle 22 near the inside of the cooling water tank 21. By adhering the rubber pad 24 to the outside of the baffle 22, when the baffle 22 is installed inside the cooling water tank 21, the rubber pad 24 is squeezed and deformed by the cooling water tank 21 and the baffle 22, thereby filling the gap between the cooling water tank 21 and the baffle 22, which helps to improve the sealing between each area.

[0040] Furthermore, such as Figures 2-4As shown, a secondary movable plate 25 is provided inside the cooling water tank 21 on the side near the baffle 22. The secondary movable plates 25 are arranged in an array inside the cooling water tank 21. The bottom of the secondary movable plates 25 is connected to a limiting post 27. By welding the limiting post 27 to the secondary movable plate 25 and arranging the secondary movable plates 25 in an array, the material strip is placed at the bottom of the limiting post 27, so that the material strip is always inside the cooling water, ensuring that the cooling water continuously cools the material strip.

[0041] Furthermore, such as Figure 3 As shown, a sleeve 26 is rotatably provided on the top of the main movable plate 31. By fitting the sleeve 26 onto the top of the main movable plate 31, the material strip is placed on the top of the sleeve 26, which facilitates the lifting of the material strip inside the cooling water and ensures that it can pass smoothly through the baffle 22, thus preventing the baffle 22 from blocking the movement of the material strip.

[0042] Furthermore, such as Figure 5 As shown, a bracket 28 is connected to the side of the cooling water tank 21 near the stainless steel heating plate 29. The stainless steel heating plate 29 is slidably connected to the bracket 28 and is welded to the bottom of the cooling water tank 21 through the bracket 28. A sliding groove adapted to the stainless steel heating plate 29 is opened on the bracket 28 so that the stainless steel heating plate 29 can slide along the sliding groove. When the adjusting baffle 22 is in the position inside the cooling water tank 21, it pushes the stainless steel heating plate 29, so that the heating area of ​​the stainless steel heating plate 29 can be adjusted according to the change of the area.

[0043] Furthermore, such as Figure 3 As shown, a nut 34 is threaded onto the threaded post 33. The threaded post 33 is fixedly connected to the side plate 32 through the nut 34. By installing the nut 34 and a washer on the threaded post 33 and tightening the nut 34, the pressure provided by the nut 34 acts on the side plate 32, increasing the friction between the nut 34 and the side plate 32, which makes it easier to fix the threaded post 33 and the main movable plate 31 at a designated position on the cooling water tank 21.

[0044] Working principle: such as Figures 1-5As shown, first, baffles 22 are placed inside the cooling water tank 21. The two baffles 22 work together to divide the inner side of the cooling water tank 21 into three areas. Then, the main movable plate 31 is pushed, and the main movable plate 31 moves along the sliding groove on the side plate 32 via the threaded column 33, so that the baffles 22 follow the main movable plate 31 to the designated position. The size of the area is adjusted so that the cooling curve is adapted to the composite material formula. Next, the nut 34 is rotated to increase the friction between the nut 34 and the side plate 32, fixing the threaded column 33 and the main movable plate 31 to the cooling water tank 21. Then, the stainless steel heating plate 29 is pushed to slide along the sliding groove on the bracket 28, so that the position of the stainless steel heating plate 29 is adjusted according to the change of the area size. An additional support rod is installed at the bottom of the cooling water tank 21 to support the cooling. Water tank 21 is used, and then stainless steel electric heating plate 29 is activated. Stainless steel electric heating plate 29 is tightly attached to the inside of cooling water tank 21 to heat the cooling water. The temperature of the cooling water in the three areas decreases sequentially from extruder 1 to pelletizer 4. After extruder 1 extrudes the strip, it is pulled along limiting post 27 and sleeve 26 to make the strip into a curved shape. Its bottom is inside the cooling water and its highest point is above the top of sleeve 26. One side of the strip is sent into the inside of pelletizer 4. Pelletizer 4 cuts the strip for pelletizing. In this process, higher temperature water is used for pre-cooling, so that the strip is initially shaped in the higher temperature zone and then gradually enters the lower temperature zone to achieve deep cooling, so that the temperature gradient inside and outside the pellet is gradual, thereby reducing internal stress.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A pelletizing device for producing a polypropylene composite material, comprising an extruder (1) and a pelletizer (4), characterized in that, Also includes: Cooling assembly (2), the cooling assembly (2) is placed on one side of the extruder (1), the cooling assembly (2) includes a cooling water tank (21) disposed between the extruder (1) and the pelletizer (4), the cooling water tank (21) is provided with baffles (22) inside, the number of baffles (22) inside the cooling water tank (21) is two, and a stainless steel electric heating plate (29) is provided at the bottom of the cooling water tank (21); An adjustment assembly (3) is placed on top of the cooling assembly (2) and is used to adjust the position of the baffle (22) inside the cooling water tank (21). The adjustment assembly (3) includes a main movable plate (31) connected to the top of the baffle (22). A side plate (32) is connected to the side of the cooling water tank (21) near the main movable plate (31). A threaded column (33) is connected to the side of the main movable plate (31) near the side plate (32). The main movable plate (31) is slidably connected to the side plate (32) through the threaded column (33).

2. The granulating device for preparing a polypropylene composite material according to claim 1, characterized in that, Heat insulation plates (23) are provided on both sides of the baffle (22).

3. The granulating device for preparing a polypropylene composite material according to claim 1, characterized in that, A rubber pad (24) is provided on the side of the baffle (22) near the inside of the cooling water tank (21).

4. The granulating device for preparing a polypropylene composite material according to claim 1, characterized in that, A secondary movable plate (25) is provided inside the cooling water tank (21) on the side near the baffle (22). The secondary movable plates (25) are arranged in an array inside the cooling water tank (21), and the bottom of the secondary movable plates (25) is connected to a limit post (27).

5. The granulation apparatus for preparing polypropylene composite materials according to claim 1, characterized in that, A sleeve (26) is rotatably provided on the top of the main movable plate (31).

6. The granulating device for preparing a polypropylene composite material according to claim 1, characterized in that, A bracket (28) is connected to the side of the cooling water tank (21) near the stainless steel heating plate (29), and the stainless steel heating plate (29) is slidably connected to the bracket (28).

7. The granulating device for preparing a polypropylene composite material according to claim 1, characterized in that, The threaded post (33) is threaded with a nut (34), and the threaded post (33) is fixedly connected to the side plate (32) by the nut (34).

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