Hydrolysis-resistant polyester foam material processing device

Abstract

The utility model relates to the technical field of polyester material processing, and discloses a hydrolysis-resistant polyester foaming material processing device which comprises a base, the base is step-shaped, a single-screw extruder and a double-screw extruder are fixed on the top surface of the base, and a connecting structure is arranged between the double-screw extruder and the single-screw extruder. Through the arrangement of the connecting structure, the single-screw extruder and the double-screw extruder are connected in series through the feeding pipe, the conveying pipe and the connecting pipe, so that a foaming main machine is formed, raw materials and a foaming agent are fused and mixed in the double-screw extruder and enter the single-screw extruder through the conveying pipe and the feeding pipe to be subjected to pressure reduction and cooling, and the raw materials and the foaming agent are uniformly mixed. The high shearing force of the double-screw extruder ensures that the foaming agent and the plastic matrix are uniformly dispersed, so that a good foaming effect is formed, and the foaming material is cooled by the single-screw extruder, so that the final product has an ideal foaming structure and density, and the foaming effect of the hydrolysis-resistant polyester foaming material is improved.

Description

Technical Field

[0001] This utility model relates to the field of polyester material processing technology, and in particular to a processing device for hydrolysis-resistant polyester foam material. Background Technology

[0002] Hydrolysis-resistant polyester foam is a high-performance new type of polymer material with excellent mechanical properties, chemical stability, and resistance to environmental aging. It exhibits particularly outstanding hydrolysis resistance in humid and hot environments. This material is typically made from modified polyester resin as a base material, with the addition of hydrolysis-resistant additives, foaming agents, and other functional auxiliaries. Foaming is a crucial process that endows hydrolysis-resistant polyester materials with multifunctionality. Through foaming, the material density can be significantly reduced while simultaneously improving its thermal insulation, sound absorption, and cushioning properties, making it more suitable for the high-performance requirements of industries such as construction, automotive, aerospace, and electronics.

[0003] Traditional foam material processing equipment typically uses twin-screw extruders or single-screw extruders for foaming. However, hydrolysis-resistant polyester foam materials are extremely sensitive to processing temperature and shear rate. Traditional extruders cannot fully meet the dual requirements of uniform foaming and performance maintenance, resulting in poor foaming effect of hydrolysis-resistant polyester foam materials. Therefore, we propose this utility model. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a processing device for hydrolysis-resistant polyester foam materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A processing device for hydrolysis-resistant polyester foam material includes a base, which is stepped. A single-screw extruder and a twin-screw extruder are fixed on the top surface of the base. The twin-screw extruder is located above the single-screw extruder. A connecting structure is provided between the twin-screw extruder and the single-screw extruder. The connecting structure includes a feed pipe that is connected to and fixed on the outer wall of the barrel of the single-screw extruder. The top end of the feed pipe is connected to and fixed on a conveying pipe through a flange. One end of the conveying pipe is connected to and fixed on a pressure valve. One end of the pressure valve is connected to and fixed on a connecting pipe. One end of the connecting pipe is connected to and fixed on the discharge end of the twin-screw extruder.

[0007] As a further embodiment of this utility model, a protective tube is fixed between the twin-screw extruder and the single-screw extruder. The feed pipe, conveying pipe and connecting pipe are all located inside the protective tube. An installation groove is opened inside the protective tube, and several heating pipes are fixed inside the installation groove. An insulation layer is fixed inside the protective tube.

[0008] As a further embodiment of this utility model, a cooling shell is fixed to one side of the single screw extruder, and a gap is left between the cooling shell and the barrel of the single screw extruder. An input pipe is connected and fixed to one side of the cooling shell, and a discharge pipe is connected and fixed to one side of the cooling shell.

[0009] As a further embodiment of this utility model, the outer cylindrical wall of the barrel of the twin-screw extruder is connected and fixed with a storage tank and a feeding tank, and the storage tank and the feeding tank are arranged in parallel.

[0010] As a further embodiment of this utility model, a stirring rod is rotatably arranged inside the storage tank, a scraper is fixed on the outer circular wall of the stirring rod, a spiral blade is fixed at the bottom end of the stirring rod, and a motor is fixed at the top end of the storage tank. The output end of the motor passes through the top surface of the storage tank and is fixed to the top end of the stirring rod.

[0011] As a further embodiment of this utility model, two protective shells are fixed on the top surface of the base, and the barrels of the single-screw extruder and the twin-screw extruder are respectively located inside the two protective shells.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This foaming material processing device, through a connecting structure, connects a single-screw extruder and a twin-screw extruder in series via a feed pipe, conveying pipe, and connecting pipe, forming a foaming host. Raw materials and foaming agents are melted and mixed in the twin-screw extruder, then enter the connecting pipe, and finally pass through the conveying pipe and feed pipe into the single-screw extruder for depressurization and cooling. The high shear force of the twin-screw extruder ensures uniform dispersion of the foaming agent and the plastic matrix, resulting in a good foaming effect. The single-screw extruder cools the foamed material and extrudes it, ensuring the final product has an ideal foam structure and density, thereby improving the foaming effect of hydrolysis-resistant polyester foamed materials. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a hydrolysis-resistant polyester foam material processing device proposed in this utility model;

[0015] Figure 2 This is a schematic diagram showing the disassembled structure of a hydrolysis-resistant polyester foam material processing device proposed in this utility model;

[0016] Figure 3 This is a schematic diagram of the disassembled structure of the protective tube of a hydrolysis-resistant polyester foam material processing device proposed in this utility model.

[0017] Figure 4 This is a schematic diagram showing the disassembled structure of the storage tank of a hydrolysis-resistant polyester foam material processing device proposed in this utility model.

[0018] In the diagram: 1. Base; 2. Single-screw extruder; 201. Feed pipe; 202. Conveying pipe; 203. Pressure valve; 204. Connecting pipe; 3. Protective pipe; 301. Mounting groove; 302. Heating pipe; 303. Insulation layer; 4. Cooling shell; 401. Discharge pipe; 402. Input pipe; 5. Storage tank; 501. Feeding tank; 6. Stirring rod; 601. Scraper; 602. Spiral blade rod; 7. Twin-screw extruder; 8. Protective shell. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing 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. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Reference Figures 1-4 A processing device for hydrolysis-resistant polyester foam material includes a base 1, which is stepped. A single-screw extruder 2 and a twin-screw extruder 7 are fixed on the top surface of the base 1. The twin-screw extruder 7 is located above the single-screw extruder 2. A connecting structure is provided between the twin-screw extruder 7 and the single-screw extruder 2. The connecting structure includes a feed pipe 201 connected to and fixed on the outer circular wall of the barrel of the single-screw extruder 2. The top end of the feed pipe 201 is connected to and fixed on a conveying pipe 202 through a flange. One end of the conveying pipe 202 is connected to and fixed on a pressure valve 203. One end of the pressure valve 203 is connected to and fixed on a connecting pipe 204. One end of the connecting pipe 204 is connected to and fixed on the discharge end of the twin-screw extruder 7. Both the single-screw extruder 2 and the twin-screw extruder 7 are existing technologies. The twin-screw extruder 7 is a co-rotating twin-screw extruder.

[0023] In this embodiment, a protective pipe 3 is fixed between the twin-screw extruder 7 and the single-screw extruder 2. The feed pipe 201, conveying pipe 202, and connecting pipe 204 are all located inside the protective pipe 3. An installation groove 301 is provided inside the protective pipe 3, and several heating pipes 302 are fixed inside the installation groove 301. An insulation layer 303 made of rock wool is fixed inside the protective pipe 3. Through the connection structure, the single-screw extruder 2 and the twin-screw extruder 7 are connected in series through the feed pipe 201, conveying pipe 202, and connecting pipe 204 to form a foaming host. The raw materials and foaming agent are melted and mixed in the twin-screw extruder 7, and after mixing, they enter the connecting pipe 204. The operator opens the pressure valve 203 to use the foaming agent. The mixed foamed material enters the single-screw extruder 2 through the conveying pipe 202 and the feed pipe 201 for depressurization and cooling. During this process, the protective pipe 3 and its internal heating pipe 302 and insulation layer 303 heat and insulate the conveyed foamed material. The high shear force of the twin-screw extruder 7 ensures the uniform dispersion of the foaming agent and the plastic matrix, thereby forming a good foaming effect. The single-screw extruder 2 further cools the foamed material and extrudes it to ensure that the final product has an ideal foaming structure and density. At this stage, the main function of the single-screw extruder 2 is to further plasticize and foam the material, ensuring that the foamed material expands and forms under low pressure, thereby improving the foaming effect of the hydrolysis-resistant polyester foamed material.

[0024] In this embodiment, a cooling shell 4 is fixed to one side of the single screw extruder 2. The cooling shell 4 is spaced apart from the barrel of the single screw extruder 2. An inlet pipe 402 is fixedly connected to one side of the cooling shell 4, and a outlet pipe 401 is fixedly connected to one side of the cooling shell 4. After the foaming material enters the single screw extruder 2, the operator inputs cooling water into the cooling shell 4 through the inlet pipe 402. The cooling water cools the foaming material through the barrel, and the cooled water is discharged through the outlet pipe 401.

[0025] In this embodiment, the outer cylindrical wall of the barrel of the twin-screw extruder 7 is connected and fixed with a storage tank 5 and a feeding tank 501. The storage tank 5 and the feeding tank 501 are arranged in parallel. The polyester material is stored and discharged through the storage tank 5, and the foaming agent is fed into the melting section of the twin-screw extruder 7 through the feeding tank 501.

[0026] In this embodiment, a stirring rod 6 is rotatably installed inside the storage tank 5. A scraper 601 is fixed to the outer circular wall of the stirring rod 6, and a spiral blade rod 602 is fixed to the bottom end of the stirring rod 6. A motor is fixed to the top of the storage tank 5, and the output end of the motor passes through the top surface of the storage tank 5 and is fixed to the top of the stirring rod 6. When the storage tank 5 discharges polyester material, the operator can start the motor to drive the stirring rod 6 to rotate, so that the scraper 601 scrapes off the material adhering to the inner wall of the storage tank 5. At the same time, the spiral blade rod 602 rotates with the stirring rod 6 to transport the material and prevent blockage when discharging the material.

[0027] In this embodiment, two protective shells 8 are fixed on the top surface of the base 1. The barrels of the single-screw extruder 2 and the twin-screw extruder 7 are located inside the two protective shells 8 respectively. The protective shells 8 can improve the protection effect of the device.

[0028] Working Principle: In operation, a single-screw extruder 2 and a twin-screw extruder 7 are connected in series via feed pipe 201, conveying pipe 202, and connecting pipe 204 to form a foaming host. Raw materials and foaming agents are melted and mixed in the twin-screw extruder 7, and then fed into the connecting pipe 204. The operator opens the pressure valve 203, allowing the mixed foaming material to enter the single-screw extruder 2 through the conveying pipe 202 and feed pipe 201 for depressurization and cooling. During this process, the protective pipe 3 and its internal heating pipe 302 and insulation layer 303 heat and insulate the conveyed foaming material. The high shear force of the twin-screw extruder 7 ensures uniform dispersion of the foaming agent and the plastic matrix, resulting in a good foaming effect. The single-screw extruder 2 further cools the foaming material and extrudes it into shape, ensuring the final product has ideal properties. The foaming structure and density are determined at this stage. The main function of the single-screw extruder 2 is to further plasticize and foam the material, ensuring that the foamed material expands and forms under low pressure. The operator inputs cooling water into the cooling shell 4 through the input pipe 402. The cooling water cools the foamed material through the barrel. The cooled water is discharged through the discharge pipe 401. The polyester material is stored and discharged through the storage tank 5. The foaming agent is fed into the melting section of the twin-screw extruder 7 in the feeding tank 501. When the storage tank 5 discharges the polyester material, the operator can start the motor to drive the stirring rod 6 to rotate, so that the scraper 601 scrapes off the material adhering to the inner wall of the storage tank 5. At the same time, the spiral blade rod 602 rotates with the stirring rod 6 to transport the material and prevent blockage when discharging the material. The protective shell 8 can improve the protection effect of the device.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A processing device for hydrolysis-resistant polyester foam material, comprising a base (1), characterized in that: The base (1) is stepped. A single screw extruder (2) and a twin screw extruder (7) are fixed on the top surface of the base (1). The twin screw extruder (7) is located above the single screw extruder (2). A connection structure is provided between the twin screw extruder (7) and the single screw extruder (2). The connection structure includes a feed pipe (201) that is connected to and fixed on the outer cylindrical wall of the barrel of the single screw extruder (2). The top end of the feed pipe (201) is connected to and fixed with a conveying pipe (202) through a flange. One end of the conveying pipe (202) is connected to and fixed with a pressure valve (203). One end of the pressure valve (203) is connected to and fixed with a connecting pipe (204). One end of the connecting pipe (204) is connected to and fixed with the discharge end of the twin screw extruder (7).

2. The processing apparatus for hydrolysis-resistant polyester foam material according to claim 1, characterized in that, A protective tube (3) is fixed between the twin-screw extruder (7) and the single-screw extruder (2). The feed pipe (201), the conveying pipe (202) and the connecting pipe (204) are all located inside the protective tube (3). An installation groove (301) is opened inside the protective tube (3). Several heating pipes (302) are fixed inside the installation groove (301). An insulation layer (303) is fixed inside the protective tube (3).

3. The apparatus for processing hydrolysis-resistant polyester foam material according to claim 2, characterized in that, A cooling shell (4) is fixed on one side of the single screw extruder (2). The cooling shell (4) is spaced apart from the barrel of the single screw extruder (2). An input pipe (402) is fixedly connected to one side of the cooling shell (4), and a discharge pipe (401) is fixedly connected to one side of the cooling shell (4).

4. The processing apparatus for hydrolysis-resistant polyester foam material according to claim 3, characterized in that, The outer cylindrical wall of the barrel of the twin-screw extruder (7) is connected and fixed with a storage tank (5) and a feeding tank (501), which are arranged in parallel.

5. The apparatus for processing hydrolysis-resistant polyester foam material according to claim 4, characterized in that, The storage tank (5) is equipped with a rotating stirring rod (6), a scraper (601) is fixed on the outer circular wall of the stirring rod (6), a spiral blade rod (602) is fixed at the bottom end of the stirring rod (6), and a motor is fixed at the top end of the storage tank (5). The output end of the motor passes through the top surface of the storage tank (5) and is fixed to the top end of the stirring rod (6).

6. The apparatus for processing hydrolysis-resistant polyester foam material according to claim 5, characterized in that, The top surface of the base (1) is fixed with two protective shells (8), and the barrels of the single screw extruder (2) and the twin screw extruder (7) are located inside the two protective shells (8).

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