Double-order physical foaming extrusion testing machine

Abstract

The utility model relates to a double-order physical foaming extrusion testing machine, and relates to the field of foaming extruders. The device comprises a machine box, the machine box comprises a base and a processing box, the processing box is installed on the upper end face of the base and fixedly connected with the base, a material mixing pipe is horizontally installed on the side face of the processing box and fixedly connected with the processing box in a sealed mode, and two sets of horizontal screw rods are symmetrically installed in the material mixing pipe; the horizontal screws are rotationally connected with the mixing pipe, and a motor set for driving the two horizontal screws to rotate synchronously is further installed on the outer side face of the processing box. Through pre-stirring of the stirring impeller in the feeding shell and synchronous stirring of the two sets of horizontal screws in the material mixing pipe, materials are fully mixed before entering the foaming stage, uniform distribution of material components is guaranteed, and the consistency of the foaming effect is improved. And meanwhile, the pressure release speed and degree can be accurately controlled through a reducing single screw in the pressure release assembly according to the characteristics of materials and process requirements.

Description

Technical Field

[0001] This application relates to the technical field of foaming extruders, and in particular to a two-stage physical foaming extrusion test machine. Background Technology

[0002] A foaming extruder is a piece of equipment used to produce foamed materials. Its main function is to mix, plasticize, and convey resin and foaming agent, and then foam them through the die head to produce foamed products with specific shapes and properties.

[0003] Traditional single-stage foaming extruders typically employ a single-screw or twin-screw structure, with material entering the screw mixing section directly from the feed inlet. Taking a single-screw extruder as an example, its screw structure is simple, relying mainly on the screw edges to propel the material forward, resulting in limited shearing and mixing effects. For multi-component materials (such as polymer matrix, foaming agent, nucleating agent, filler, etc.), insufficient mixing often leads to localized component segregation.

[0004] Meanwhile, traditional equipment often uses fixed throttling orifices or simple ball valves for pressure relief, which cannot dynamically adjust the pressure relief rate according to material characteristics (such as melt viscosity and temperature), easily leading to pressure fluctuations during the foaming process. This makes it difficult to meet the stringent pressure gradient requirements of precision foaming processes (such as microfoaming). Utility Model Content

[0005] To achieve stability during the foaming extrusion process, this application provides a two-stage physical foaming extrusion testing machine.

[0006] The two-stage physical foaming extrusion testing machine provided in this application adopts the following technical solution:

[0007] A two-stage physical foaming extrusion tester includes a casing, which comprises a base and a processing box. The processing box is mounted on the upper surface of the base and is fixedly connected to the base. A mixing pipe is horizontally mounted on the side of the processing box and is sealed and fixedly connected to the processing box. Two sets of horizontal screws are symmetrically mounted in the mixing pipe and are rotatably connected to the mixing pipe. A motor set for driving the two sets of horizontal screws to rotate synchronously is also mounted on the outer side of the processing box. A pressure relief assembly is installed at the end of the mixing pipe and is sealed to the mixing pipe. A discharge shell is fixedly installed at the end of the pressure relief assembly.

[0008] By adopting the above technical solution, the base of the chassis provides stable support for the entire testing machine, ensuring that the equipment will not shake during operation and guaranteeing the stability and accuracy of the test. The processing box is used for the preliminary treatment and processing of materials, and its fixed connection with the base ensures the structural stability. The mixing pipe is horizontally installed on the side of the processing box, facilitating the conveying and mixing of materials, and its sealed connection prevents material leakage. Two sets of horizontal screws are symmetrically installed in the mixing pipe, rotating synchronously under the drive of the motor unit, which can fully mix and convey the materials, making the materials evenly distributed in the mixing pipe, improving the mixing effect, and enabling stable downward conveying. The pressure relief component is installed at the end of the mixing pipe, which can precisely control the pressure release of the materials, providing suitable pressure conditions for the subsequent foaming process, facilitating the stable foaming and discharge of the raw materials. The discharge shell is used for the final discharge of the materials, ensuring that the materials can be extruded smoothly.

[0009] Optionally, the processing box includes a mixing shell and a feeding shell, wherein the feeding shell is installed on the upper end face of the mixing shell and is fixedly connected to the mixing shell.

[0010] By adopting the above technical solution, the processing box is divided into a mixing shell and a feeding shell. The feeding shell is located on the upper surface of the mixing shell. This structural design facilitates the feeding and initial mixing of materials. The feeding shell can serve as the material inlet, introducing the material into the mixing shell for further processing. This clear division of labor improves processing efficiency.

[0011] Optionally, a positioning frame is installed in the feed shell, the positioning frame is fixedly connected to the feed shell, and guide plates are symmetrically installed on both sides of the lower end face of the positioning frame, the guide plates are fixedly connected to the positioning frame.

[0012] By adopting the above technical solution, the positioning frame in the feed shell provides an installation base for other components, ensuring the accurate installation position of each component. The guide plates are symmetrically installed on both sides of the lower end face of the positioning frame, guiding the material to flow evenly into the mixing shell and preventing material accumulation or deviation during the feeding process, allowing the material to enter the mixing shell more smoothly for mixing.

[0013] Optionally, a device housing is fixedly installed in the middle of the positioning frame, a drive motor is fixedly installed in the device housing, and an agitator impeller is installed at the output of the drive motor.

[0014] By adopting the above technical solution, the drive motor in the equipment shell drives the stirring impeller to rotate, pre-stirring the material before it enters the mixing shell, further improving the mixing uniformity of the material. The high-speed rotation of the stirring impeller can break up the agglomeration of the material, allowing materials of different components to come into full contact, laying a good foundation for the subsequent mixing and foaming processes.

[0015] Optionally, the mixing pipe includes a cylindrical pipe and an extrusion head, wherein the extrusion head is installed at one end of the cylindrical pipe and is sealed and fixedly connected to the cylindrical pipe.

[0016] By adopting the above technical solution, the mixing tube is composed of a cylindrical tube and an extrusion head. The cylindrical tube provides sufficient space for mixing materials, while the extrusion head can further compress and shape the materials, so that the materials have a certain shape and pressure before entering the pressure relief component, which facilitates the subsequent pressure release and foaming process.

[0017] Optionally, the pressure relief assembly includes a horn housing and a variable diameter single screw, the horn housing being sealed to the outlet of the extrusion head, and the variable diameter single screw being rotatably mounted in the horn housing.

[0018] By adopting the above technical solution, the horn-shaped housing of the pressure relief component is sealed at the outlet of the extrusion head, which can effectively collect and guide the material into the variable-diameter single screw. The variable-diameter single screw is rotatably installed in the horn-shaped housing, and its variable-diameter structure can precisely control the pressure release rate and degree of the material, so that the material foams under appropriate pressure, thereby improving the quality and uniformity of foaming.

[0019] Optionally, the discharge shell includes a top shell and a longitudinal shell, the longitudinal shell being fixedly installed on the lower end face of the top shell, and a guide arc plate being fixedly installed in the longitudinal shell.

[0020] By adopting the above technical solution, the top shell and longitudinal shell structure of the discharge shell are reasonably designed. The guide arc plate in the longitudinal shell can guide the material to flow evenly during the discharge process, avoiding blockage or unevenness of the material during discharge, thus ensuring the smoothness of discharge and the quality of molding.

[0021] Optionally, a top motor is fixedly installed in the top shell, and the output end of the top motor is connected to a variable diameter single screw via a belt.

[0022] By adopting the above technical solution, the top motor in the top shell is connected to the variable-diameter single screw via a belt, providing power to the variable-diameter single screw and enabling it to rotate stably. This transmission method has a simple structure, high transmission efficiency, and can precisely control the speed of the variable-diameter single screw, thereby achieving precise control of material pressure release.

[0023] In summary, this application includes at least one of the following beneficial technical effects: By pre-mixing with an impeller in the feed shell and simultaneously mixing with two sets of horizontal screws in the mixing pipe, the material is fully mixed before entering the foaming stage, ensuring a uniform distribution of material components and improving the consistency of the foaming effect. Simultaneously, the variable-diameter single screw in the pressure relief assembly can precisely control the pressure release rate and degree according to the material characteristics and process requirements, providing stable pressure conditions for the foaming process and avoiding problems such as uneven foaming and inconsistent bubble size caused by unstable pressure. The guide arc plate in the discharge shell guides the material to flow uniformly, ensuring smooth extrusion and guaranteeing the molding quality of the material, resulting in more stable product appearance and performance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0025] Figure 2 yes Figure 1 The diagram shows a perspective view of the device without the pressure relief assembly and discharge shell installed.

[0026] Figure 3 This is the book Figure 2 Top view of the device shown.

[0027] Figure 4 This is a perspective view of the positioning frame and the device housing in the embodiments of this application.

[0028] Figure 5 This is an exploded structural diagram of the pressure relief component in the embodiments of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Chassis; 10. Motor unit; 11. Base; 12. Processing box; 121. Mixing shell; 122. Feeding shell; 13. Positioning frame; 131. Guide plate; 14. Equipment shell; 141. Agitator impeller; 2. Mixing pipe; 21. Cylindrical pipe; 22. Extrusion head; 3. Horizontal screw; 4. Pressure relief assembly; 41. Horn shell; 42. Variable diameter single screw; 5. Discharge shell; 51. Top shell; 52. Longitudinal material shell; 521. Guide arc plate; 53. Top motor. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] This application discloses a two-stage physical foaming extrusion testing machine. (Refer to...) Figure 1 , Figure 2 and Figure 3As shown, the two-stage physical foaming extrusion testing machine includes a chassis 1, which comprises a base 11 and a processing box 12. The processing box 12 is mounted on the upper surface of the base 11 and is fixedly connected to the base 11. A mixing pipe 2 is horizontally mounted on the side of the processing box 12 and is sealed and fixedly connected to the processing box 12. Two sets of horizontal screws 3 are symmetrically mounted in the mixing pipe 2 and are rotatably connected to the mixing pipe 2. A motor set 10 for driving the two sets of horizontal screws 3 to rotate synchronously is also mounted on the outer surface of the processing box 12. A pressure relief component 4 is installed at the end of the mixing pipe 2 and is sealed to the mixing pipe 2. A discharge shell 5 is fixedly installed at the end of the pressure relief component 4. The base 11 of the chassis 1 provides stable support for the entire testing machine, ensuring that the equipment will not shake during operation and guaranteeing the stability and accuracy of the test. The processing box 12 is used for preliminary processing and treatment of materials, and its fixed connection with the base 11 ensures the structural stability. The mixing pipe 2 is horizontally installed on the side of the processing box 12, facilitating material conveying and mixing, and its sealed connection prevents material leakage. Two sets of horizontal screws 3 are symmetrically installed in the mixing pipe 2, rotating synchronously under the drive of the motor unit 10. This ensures thorough mixing and conveying of the material, resulting in uniform material distribution within the mixing pipe 2, improving the mixing effect, and enabling stable downward conveying. The pressure relief component 4 is installed at the end of the mixing pipe 2, precisely controlling the pressure release of the material and providing suitable pressure conditions for the subsequent foaming process, facilitating stable foaming and discharge of the raw material. The discharge shell 5 is used for the final discharge of the material, ensuring smooth extrusion. The motor unit 10 can be a Siemens 1LG0 series three-phase asynchronous motor, which features high efficiency, energy saving, and stable operation, meeting the drive requirements of the horizontal screws 3. The base 11 of the chassis 1 and the processing box 12 can be made of high-quality carbon steel, with surface treatment (such as painting), providing good strength and corrosion resistance. The horizontal screw 3 and the variable diameter single screw 42 can be made of alloy steel, and their hardness and wear resistance can be improved by heat treatment to ensure that no wear and deformation will occur during long-term operation.

[0032] Reference Figure 3 and Figure 4As shown, the processing box 12 includes a mixing shell 121 and a feeding shell 122. The feeding shell 122 is installed on the upper end face of the mixing shell 121 and is fixedly connected to the mixing shell 121. The processing box 12 is divided into a mixing shell 121 and a feeding shell 122. The feeding shell 122 is located on the upper end face of the mixing shell 121. This structural design facilitates the feeding and initial mixing of materials. The feeding shell 122 can serve as the material inlet, introducing the material into the mixing shell 121 for further processing. The division of labor is clear, improving processing efficiency. A positioning frame 13 is installed in the feeding shell 122. The positioning frame 13 is fixedly connected to the feeding shell 122, and guide plates 131 are symmetrically installed on both sides of the lower end face of the positioning frame 13. The guide plates 131 are fixedly connected to the positioning frame 13. The positioning frame 13 in the feeding shell 122 provides an installation base for other components, ensuring the accurate installation position of each component. The guide plates 131 are symmetrically installed on both sides of the lower end face of the positioning frame 13, which can guide the material to flow evenly into the mixing shell 121, avoiding material accumulation or deviation during the feeding process, and allowing the material to enter the mixing shell 121 more smoothly for mixing. A device housing 14 is fixedly installed in the middle of the positioning frame 13, and a drive motor is fixedly installed in the device housing 14. An agitator impeller 141 is installed at the output of the drive motor. The drive motor in the device housing 14 drives the agitator impeller 141 to rotate, pre-stirring the material before it enters the mixing shell 121, further improving the mixing uniformity of the material. The high-speed rotation of the agitator impeller 141 can break up the agglomeration of the material, allowing materials of different components to fully contact each other, laying a good foundation for the subsequent mixing and foaming processes.

[0033] Reference Figure 3 As shown, the mixing pipe 2 includes a cylindrical pipe 21 and an extrusion head 22. The extrusion head 22 is installed at one end of the cylindrical pipe 21 and is sealed and fixedly connected to the cylindrical pipe 21. The mixing pipe 2 consists of the cylindrical pipe 21 and the extrusion head 22. The cylindrical pipe 21 provides sufficient space for mixing materials, while the extrusion head 22 can further compress and shape the materials, giving them a certain shape and pressure before entering the pressure relief component 4, facilitating subsequent pressure release and foaming processes. The mixing pipe 2, using the cylindrical pipe 21 and the extrusion head 22, can be made of stainless steel, such as 304 stainless steel, which has good corrosion resistance and wear resistance, ensuring that the material conveying and mixing process is not contaminated.

[0034] Reference Figure 5As shown, the pressure relief assembly 4 includes a horn shell 41 and a variable-diameter single screw 42. The horn shell 41 is sealed to the outlet of the extrusion head 22, and the variable-diameter single screw 42 is rotatably mounted in the horn shell 41. The horn shell 41 of the pressure relief assembly 4, sealed to the outlet of the extrusion head 22, effectively collects and guides material into the variable-diameter single screw 42. The variable-diameter single screw 42, rotatably mounted in the horn shell 41, precisely controls the pressure release rate and degree of the material through its variable-diameter structure, allowing the material to foam under appropriate pressure, thus improving the quality and uniformity of foaming.

[0035] Reference Figure 1 As shown, the discharge shell 5 includes a top shell 51 and a longitudinal shell 52. The longitudinal shell 52 is fixedly installed on the lower end face of the top shell 51, and a guide arc plate 521 is fixedly installed in the longitudinal shell 52. The top shell 51 and the longitudinal shell 52 of the discharge shell 5 are structurally designed. The guide arc plate 521 in the longitudinal shell 52 can guide the material to flow evenly during the discharge process, avoiding blockage or unevenness of the material during discharge, thus ensuring smooth discharge and molding quality. The top shell 51 and the longitudinal shell 52 of the discharge shell 5 can be made of aluminum alloy, which has the advantages of light weight and good heat dissipation. The guide arc plate 521 can be made of stainless steel to ensure smooth material flow. A top motor 53 is fixedly installed in the top shell 51, and the output end of the top motor 53 is connected to the variable diameter single screw 42 via a belt. The top motor 53 in the top housing 51 is connected to the variable-diameter single screw 42 via a belt, providing power to the variable-diameter single screw 42 and enabling it to rotate stably. This transmission method has a simple structure, high transmission efficiency, and can precisely control the speed of the variable-diameter single screw 42, thereby achieving precise control of material pressure release. The variable-diameter single screw 42 can be made of alloy steel, and its hardness and wear resistance can be improved through heat treatment to ensure that no wear or deformation occurs during long-term operation.

[0036] The implementation principle of the two-stage physical foaming extrusion tester in this application embodiment is as follows: In actual use, the power is turned on, and the motor set 10, the top motor 53, and the drive motor are started. The material is added from the feed shell 122. After being pre-stirred by the stirring impeller 141 in the feed shell 122, the material flows evenly into the mixing shell 121 under the guidance of the guide plate 131. After the material enters the mixing pipe 2, the two sets of horizontal screws 3 rotate synchronously under the drive of the motor set 10 to fully stir and mix the material. The mixed material enters the pressure relief component 4 through the extrusion head 22. The variable diameter single screw 42 rotates under the drive of the top motor 53 to precisely control the pressure release of the material. After the pressure is released, the material enters the discharge shell 5 and is evenly extruded under the guidance of the guide arc plate 521 to complete the physical foaming extrusion test.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A two-stage physical foaming extrusion testing machine, comprising a casing (1), characterized in that: The chassis (1) includes a base (11) and a processing box (12). The processing box (12) is installed on the upper surface of the base (11) and is fixedly connected to the base (11). A mixing pipe (2) is horizontally installed on the side of the processing box (12). The mixing pipe (2) is sealed and fixedly connected to the processing box (12). Two sets of horizontal screws (3) are symmetrically installed in the mixing pipe (2). The horizontal screws (3) are rotatably connected to the mixing pipe (2). A motor set (10) for driving the two sets of horizontal screws (3) to rotate synchronously is also installed on the outer side of the processing box (12). A pressure relief assembly (4) is installed at the end of the mixing pipe (2). The pressure relief assembly (4) is sealed and connected to the mixing pipe (2). A discharge shell (5) is fixedly installed at the end of the pressure relief assembly (4).

2. The two-stage physical foaming extrusion tester according to claim 1, characterized in that: The processing box (12) includes a mixing shell (121) and a feeding shell (122). The feeding shell (122) is installed on the upper end face of the mixing shell (121) and is fixedly connected to the mixing shell (121).

3. The two-stage physical foaming extrusion tester according to claim 2, characterized in that: A positioning frame (13) is installed in the feed shell (122). The positioning frame (13) is fixedly connected to the feed shell (122), and guide plates (131) are symmetrically installed on both sides of the lower end face of the positioning frame (13). The guide plates (131) are fixedly connected to the positioning frame (13).

4. The two-stage physical foaming extrusion tester according to claim 3, characterized in that: The positioning frame (13) has a device housing (14) fixedly installed in the middle, and a drive motor is fixedly installed in the device housing (14). The output of the drive motor is equipped with a stirring impeller (141).

5. The two-stage physical foaming extrusion tester according to claim 4, characterized in that: The mixing pipe (2) includes a cylindrical pipe (21) and an extrusion head (22). The extrusion head (22) is installed at one end of the cylindrical pipe (21) and is sealed and fixedly connected to the cylindrical pipe (21).

6. The two-stage physical foaming extrusion tester according to claim 5, characterized in that: The pressure relief assembly (4) includes a horn shell (41) and a variable diameter single screw (42). The horn shell (41) is sealed to the outlet of the extrusion head (22), and the variable diameter single screw (42) is rotatably installed in the horn shell (41).

7. The two-stage physical foaming extrusion tester according to claim 6, characterized in that: The discharge shell (5) includes a top shell (51) and a longitudinal shell (52). The longitudinal shell (52) is fixedly installed on the lower end face of the top shell (51), and a guide arc plate (521) is fixedly installed in the longitudinal shell (52).

8. The two-stage physical foaming extrusion tester according to claim 7, characterized in that: A top motor (53) is fixedly installed in the top shell (51), and the output end of the top motor (53) is connected to a variable diameter single screw (42) via a belt.

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