High flow ppo compounding extrusion device

Abstract

The utility model provides a kind of high flow PPO mixing extrusion device, it includes first premelt storehouse, second premelt storehouse, mixing bin and mixing bin;First premelt storehouse, second premelt storehouse and mixing bin are respectively provided with first screw rod, second screw rod and third screw rod, the front and rear ends of the first premelt storehouse are equipped with first feeding port and first discharge port respectively, the front and rear ends of the second premelt storehouse are equipped with second feeding port and second discharge port respectively, the front end and rear end of the mixing bin are equipped with mixing inlet and extrusion outlet respectively, mixing runner is equipped in the mixing bin, the first discharge port the second discharge port and the mixing inlet are all communicated with the mixing runner.The utility model is provided with two premelt storehouses, two kinds of material compositions are premelted and mixed in two premelt storehouses respectively, then enter into mixing bin mixing, extrusion, and the modified high flow PPO material obtained, improve mixing effect, and processing temperature is easy to control.

Description

Technical Field

[0001] This utility model relates to the field of plastic melt processing technology, and specifically to a high-flow PPO compounding extrusion device. Background Technology

[0002] PPO is non-toxic, transparent, and has a low relative density. It possesses excellent mechanical strength, resistance to stress relaxation, creep resistance, heat resistance, water resistance, water vapor resistance, and dimensional stability. Its main drawback is poor melt flowability, making it difficult to process and mold. In existing technologies, PPO is generally blended with other polymer materials to obtain easily processed, high-flow PPO materials. For example, a common modification scheme is to blend PS, PPO, and other additives.

[0003] PPO and PS have different processing properties. To ensure good mixing, the raw materials generally need to be pretreated before being extruded to obtain the finished product. For example, in the technical solution disclosed in patent application CN202110725806.7, the PPO and PS components are granulated separately, and then the two material granules are fed into an extruder to obtain the finished product. In the technical solution disclosed in patent application CN202111660084.8, the raw materials are first stirred and mixed using a high-speed mixer, and then the mixed raw materials are fed into an extruder to obtain the finished product. The above solutions can improve the mixing effect of PPO and PS to a certain extent, but usually require the use of two sets of equipment for processing, resulting in low production efficiency and large space occupation. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a high-flow PPO compounding and extrusion apparatus. This apparatus can be used for the blending and modification of PPO materials to obtain high-flow PPO materials. It is particularly suitable for production situations where the processing temperatures of the two blended materials differ significantly, resulting in high production efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-flow PPO compounding and extrusion apparatus includes a first pre-melting chamber, a second pre-melting chamber, a mixing chamber, and a compounding chamber. A first screw, a second screw, and a third screw are respectively installed in the first pre-melting chamber, the second pre-melting chamber, and the compounding chamber. A first feed port and a first discharge port are respectively provided at the front and rear ends of the first pre-melting chamber. A second feed port and a second discharge port are respectively provided at the front and rear ends of the second pre-melting chamber. A mixing inlet and an extrusion port are respectively provided at the front and rear ends of the compounding chamber. A mixing channel is provided in the mixing chamber, and the first discharge port, the second discharge port, and the mixing inlet are all connected to the mixing channel.

[0006] Furthermore, the first pre-melting chamber and the second pre-melting chamber are disposed at a first height, and the second pre-melting chamber is disposed at a second height lower than the first height.

[0007] Furthermore, the first screw and the second screw are parallel to each other and face the same direction, while the third screw is parallel to each other and faces the opposite direction.

[0008] Furthermore, the mixing channel includes a vertically extending main channel and two horizontally extending branch channels connected to the main channel, with the first discharge port and the second discharge port each connected to one of the branch channels.

[0009] Furthermore, the mixing chamber also includes a stirring mechanism disposed on the main channel, the stirring mechanism including a stirring shaft and stirring blades connected to the stirring shaft.

[0010] Furthermore, the stirring blade includes an extension radially connected to the stirring shaft and a stirring section disposed parallel to the stirring shaft and connected to the end of the extension.

[0011] Furthermore, the stirring section mates with the inner wall of the main channel.

[0012] Furthermore, the stirring part has a cutting edge with gradually decreasing thickness on the side facing its own rotation direction.

[0013] Furthermore, the branch channel is positioned at a height lower than the extension.

[0014] Furthermore, a first hopper and a second hopper are respectively connected to the first feeding port and the second feeding port. A first baffle plate extending upward is connected to the side of the first hopper near the second hopper, and a second baffle plate extending upward is connected to the side of the second hopper near the first hopper.

[0015] The following beneficial effects can be achieved by applying this utility model: 1. This utility model is equipped with two pre-melting chambers, in which two polymer material compositions with different processing temperatures can be added respectively. For example, a PPO material composition is added to the first pre-melting chamber and a PS material composition is added to the second pre-melting chamber. The two material compositions are pre-melted and mixed separately in the two pre-melting chambers. Then, the two sets of melts are mixed through a mixing chamber and then entered into a mixing chamber for mixing and extrusion to obtain a modified high-flow PPO material. When two polymer materials with different processing temperatures are directly mixed, the mixing difficulty is high, which can easily lead to poor mixing effect or high-temperature decomposition of some materials, and the process parameters are not easy to control. However, this utility model pre-processes the two high-flow material compositions separately, which improves the mixing effect and makes the processing temperature easy to control.

[0016] 2. The two pre-melting chambers of this utility model are connected to the mixing chamber. The two sets of melts extruded from the pre-melting chamber directly enter the mixing chamber for mixing, without the need to granulate them separately and then remix them, thus improving the process efficiency.

[0017] 3. In some embodiments of this utility model, a stirring mechanism is provided in the mixing chamber. The stirring mechanism can initially disperse the two sets of melts entering the mixing chamber and improve the mixing effect. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of one embodiment of the present utility model; Figure 2 This is a structural diagram of the first pre-melting bin, mixing bin, and compounding bin; Figure 3 This is a schematic diagram of the structure of the first and second pre-melting chambers; Figure 4 This is a schematic diagram of the stirring mechanism; Figure 5 This is a schematic diagram of the structure of the first hopper; In the figure, 1-first pre-melting chamber, 11-first screw, 12-first feeding port, 13-first discharge port, 14-first hopper, 141-baffle plate, 2-second pre-melting chamber, 21-second screw, 22-second discharge port, 3-mixing chamber, 31-main flow channel, 32-branch flow channel, 33-stirring mechanism, 331-stirring shaft, 332-stirring blade, 333-extension, 334-stirring section, 335-cutting edge, 4-mixing chamber, 41-third screw, 42-mixing inlet, 43-extrusion port. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model. Example

[0020] Reference Figures 1-5An embodiment of this utility model provides a high-flow PPO compounding and extrusion device, which includes a first pre-melting chamber 1, a second pre-melting chamber 2, a mixing chamber 3, and a mixing chamber 4. A first screw 11, a second screw 21, and a third screw 41 are respectively provided in the first pre-melting chamber 1, the second pre-melting chamber 2, and the mixing chamber 3. A first feeding port 12 and a first discharge port 13 are respectively provided at the front and rear ends of the first pre-melting chamber 1. A second feeding port and a second discharge port 22 are respectively provided at the front and rear ends of the second pre-melting chamber 2. A mixing inlet 42 and an extrusion port 43 are respectively provided at the front and rear ends of the mixing chamber 4. A mixing channel is provided in the mixing chamber. The first discharge port 13, the second discharge port 22, and the mixing inlet 42 are all connected to the mixing channel.

[0021] The working principle of this embodiment is as follows: First, a first material and a second material with different processing temperatures are fed into the first and second feeding ports respectively. The first material and the second material form a first melt and a second melt in the first and second pre-melting chambers respectively. The first melt and the second melt enter the mixing channel of the mixing chamber through the first and second discharge ports respectively and mix with each other. The mixed melt enters the mixing chamber through the mixing inlet. After mixing, the modified high-flow PPO material is obtained by extrusion through the extrusion port. Taking the most common blending modification method as an example, the first material contains PPO and related additives, and the second material contains PS and related additives. The first pre-melting chamber and the second pre-melting chamber can be set with different processing temperatures to ensure that both materials can form a good melt and to avoid the decomposition of PS material with a lower processing temperature during the melting process, thus ensuring the mixing effect. In addition, the pre-melting and mixing steps of this utility model are carried out continuously, resulting in high production efficiency.

[0022] To achieve better space utilization, in this embodiment, the first screw 11 and the second screw 21 are parallel to each other and face the same direction, while the first screw 11 and the third screw 41 are parallel to each other and face opposite directions. This ensures that the space occupied by this invention is smaller. The first pre-melting chamber and the second pre-melting chamber are set at the same first height, and the mixing chamber is set at a second height lower than the first height. The mixing chamber is located between the first pre-melting chamber and the second pre-melting chamber, thus ensuring that the space occupied by this invention is smaller. The structure of the first pre-melting chamber, the second pre-melting chamber, and the mixing chamber is compact, which is convenient for plant layout.

[0023] To further improve the mixing effect, in this embodiment, the mixing chamber 3 includes a vertically extending main channel 31 and two horizontally extending branch channels 32 connected to the main channel. The first discharge port 13 and the second discharge port 22 are each connected to one branch channel. A stirring mechanism 33 is provided in the main channel 31. The stirring mechanism includes a stirring shaft 331 connected to a motor and stirring blades 332 connected to the stirring shaft 331. The stirring blades 332 include an extension 333 radially connected to the stirring shaft 331 and a stirring part 334 parallel to the stirring shaft 331 connected to the end of the extension 333. A cutting edge 335 with gradually decreasing thickness is formed on the side of the stirring part facing the direction of rotation. The stirring part cooperates with the interior of the main channel. When the stirring blades rotate, the strip-shaped melt squeezed into the main channel 31 from the two branch channels 32 is cut into several discontinuous small segments by the cutting edge 335 of the stirring part 334, thereby ensuring that the first melt and the second melt entering the mixing chamber have good dispersion.

[0024] In this embodiment, a first hopper and a second hopper are respectively connected to the first feeding port and the second feeding port. The first hopper and the second hopper are arranged side by side. In order to ensure that the feeding does not interfere with each other, refer to... Figure 5 Taking the first hopper 14 as an example, the side of the first hopper 14 closest to the second hopper is connected to an upwardly extending first baffle plate 141. Under the action of the first baffle plate 141, when feeding material into the first hopper, the material is not easily accidentally fed into the second hopper. Similarly, the second hopper is provided with a second baffle plate.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 high-flow PPO compounding extrusion apparatus, characterized in that: It includes a first pre-melting chamber (1), a second pre-melting chamber (2), a mixing chamber (3), and a mixing chamber (4); the first pre-melting chamber (1), the second pre-melting chamber (2), and the mixing chamber (4) are respectively provided with a first screw (11), a second screw (21), and a third screw (41). The first pre-melting chamber (1) is provided with a first feeding port (12) and a first discharge port (13) at its front and rear ends, respectively. The second pre-melting chamber (2) is provided with a second feeding port and a second discharge port (22) at its front and rear ends, respectively. The mixing chamber (4) is provided with a mixing inlet (42) and an extrusion port (43) at its front and rear ends, respectively. The mixing chamber is provided with a mixing channel. The first discharge port, the second discharge port, and the mixing inlet are all connected to the mixing channel.

2. The high-flow PPO compounding extrusion apparatus according to claim 1, characterized in that: The first pre-melting chamber and the second pre-melting chamber are located at a first height, and the second pre-melting chamber is located at a second height lower than the first height.

3. A high flow PPO compounding extrusion device according to claim 2, characterized in that: The first screw and the second screw are parallel to each other and face the same direction, while the third screw is parallel to each other and faces the opposite direction.

4. The high-flow PPO compounding extrusion apparatus according to claim 1, characterized in that: The mixing channel includes a vertically extending main channel (31) and two horizontally extending branch channels (32) connected to the main channel (31), with the first discharge port and the second discharge port each connected to one of the branch channels.

5. A high-flow PPO compounding extrusion apparatus according to claim 4, characterized in that: The mixing bin also includes a stirring mechanism (33) disposed on the main channel, the stirring mechanism including a stirring shaft (331) and stirring blades (332) connected to the stirring shaft.

6. A high flow PPO compounding extrusion device according to claim 5, characterized in that: The stirring blade (332) includes an extension (333) that is radially connected to the stirring shaft (331) and a stirring section (334) that is parallel to the stirring shaft and connected to the end of the extension.

7. A high-flow PPO compounding extrusion apparatus according to claim 6, characterized in that: The stirring section (334) is fitted with the inner wall of the main channel.

8. A high flow PPO compounding extrusion device according to claim 6, characterized in that: The stirring part (334) has a cutting edge (335) with gradually decreasing thickness on the side facing its own rotation direction.

9. A high flow PPO compounding extrusion device according to claim 6, characterized in that: The branch channel (32) is positioned at a height lower than the extension (333).

10. A high flow PPO compounding extrusion device according to claim 1, characterized in that: A first hopper (14) and a second hopper are respectively connected to the first feeding port and the second feeding port. A first baffle plate (141) extending upward is connected to the side of the first hopper near the second hopper, and a second baffle plate extending upward is connected to the side of the second hopper near the first hopper.

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