Extrusion device for drain board production line
By designing an extrusion device with a specific structure and a vacuum system, the problem of poor plasticization effect of PE materials in the prior art is solved, more efficient plasticization and production efficiency are achieved, and the products of drainage plates are improved quality.
Patent Information
- Application Number
- CN202421229165.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing plastic extruders have poor plasticizing effects on materials in the production of PE drainage plates, resulting in low product quality, low production efficiency and waste of raw materials.
An extrusion device including an extruder, a net changer, a metering pump and an extrusion die is designed. The extrusion screw structure consists of a feed section, a compression section, a homogenization section, a barrier section and an exhaust section, with the main thread Alternately arranged with the secondary thread, the compression ratio is 2.3 to 2.5, combined with the vacuum system and temperature control components, the plasticization effect of the material is improved.
It improves the plasticization effect of PE materials, improves product quality, reduces raw material waste, and improves production efficiency.
Smart Images
Figure CN222346254U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of plastic production equipment, and in particular to an extrusion device for a drainage board production line. Background Art
[0002] In the production of PE drainage boards, the existing plastic extruders are limited by the extrusion screw structure, and their plasticizing effect on PE materials is poor. It is easy to over-plasticize the materials, which affects the quality of the final product, wastes raw materials and has low production efficiency. Summary of the invention
[0003] In order to solve the above-mentioned technical problems, the purpose of this application is to provide an extrusion device for a drainage board production line.
[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an extrusion device for a drainage board production line, comprising an extruder, a screen changer, a metering pump and an extrusion die connected in sequence from front to back, the extruder comprising a barrel, an extrusion screw rotatably arranged in the barrel around its own axis, a motor for driving the extrusion screw to rotate and a vacuum system connected to the barrel; the extrusion screw comprises a rod body extending from front to back and a main thread extending spirally along the rod body, the compression ratio of the extrusion screw is 2.3 to 2.5, the rod body is sequentially composed of a feed section, a compression section, a first homogenizing section, a barrier section, an exhaust section and a second homogenizing section from front to back, the main threads are distributed in the feed section, the compression section, the first homogenizing section, the exhaust section and the second homogenizing section In the second homogenizing section, the bottom diameter of the compression section gradually increases from front to back, the bottom diameter of the exhaust section is smaller than the bottom diameters of other sections, and the exhaust section is also provided with a spirally extending secondary thread, and the secondary thread and the main thread are alternately arranged from front to back in the exhaust section; the barrier section includes a pair of barrier groups arranged in sequence from front to back and an annular groove arranged between the pair of barrier groups, each of the barrier groups includes a plurality of material troughs and a plurality of barriers arranged in sequence along the circumference of the rod body, each of the material troughs has an angle greater than 0° with the axial center line of the rod body, one barrier is arranged between two adjacent material troughs, the annular groove is arranged around a circle of the barrier section, and each of the material troughs is connected to the annular groove.
[0005] In the above technical solution, it is further preferred that the outer diameter of the main thread is consistent in each segment, and the outer diameter of the secondary thread is equal to the outer diameter of the main thread.
[0006] In the above technical solution, it is further preferred that the lead of the main thread of the feed section, the lead of the main thread of the compression section, the lead of the main thread of the first homogenizing section and the lead of the main thread of the second homogenizing section are consistent, and the lead of the main thread of the exhaust section is greater than the lead of the main thread of the feed section.
[0007] In the above technical solution, it is further preferred that the length of the feeding section is greater than the lengths of other sections, and the length of the first homogenizing section is less than the lengths of other sections.
[0008] In the above technical solution, it is further preferred that the bottom of the material trough is located outside the bottom of the annular groove.
[0009] In the above technical solution, it is further preferred that the angle is 10°-20°.
[0010] In the above technical solution, it is further preferred that a flow channel connected to an external fluid is opened inside the feed section, and oil or water flows through the flow channel.
[0011] In the above technical solution, it is further preferred that the barrel is provided with a feed port and an exhaust port, the position of the feed port corresponds to the feed section, a cooling channel is opened on the barrel, and the cooling channel is arranged adjacent to the feed port; the position of the exhaust port corresponds to the exhaust section, and the exhaust port is connected to the vacuum system.
[0012] In the above technical solution, it is further preferred that a plurality of temperature control components are arranged on the barrel, and the barrel is divided into a plurality of areas from front to back, each area is equipped with a temperature control component, and each temperature control component includes a temperature sensor for measuring the temperature of the corresponding area and a fan for reducing the temperature of the corresponding area, and the fan is connected to the corresponding temperature sensor signal.
[0013] In the above technical solution, it is further preferred that the metering pump and the extrusion die are arranged on a die frame.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] The structure of the extrusion screw of the present application is suitable for producing PE drainage boards, improving the plasticizing effect of PE materials and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of the structure of an extrusion device provided in an embodiment of the present application;
[0017] Figure 2 for Figure 1 The structural diagram of the barrel in FIG.
[0018] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;
[0019] Figure 4 for Figure 1 Schematic diagram of the structure of the extrusion screw;
[0020] Figure 5 for Figure 4 A schematic diagram of the structure of the feed section in FIG.
[0021] Figure 6 for Figure 4 Schematic diagram of the structure of the barrier segment.
[0022] Wherein: 100, extrusion device; 10, extruder; 1, barrel; 11, feed port; 12, discharge port; 13, exhaust port; 14, cooling channel; 2, extrusion screw; 21, rod body; 210, channel; 211, feed section; 212, compression section; 213, first homogenization section; 214, barrier section; 215, exhaust section; 216, second homogenization section; 22, main thread; 23, barrier group; 231, trough; 232, barrier; 24, ring groove; 25, secondary thread; 3, motor; 4, vacuum system; 5, temperature control component; 51, fan; 6, frame; 20, screen changer; 30, metering pump; 40, extrusion mold; 50, mold frame. DETAILED DESCRIPTION
[0023] To describe the technical content, structural features, achieved purpose and effect of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.
[0024] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.
[0025] The “front” and “back” mentioned in this application are as follows: Figure 1 Before and after shown.
[0026] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.
[0027] The present application embodiment provides an extrusion device for a drainage board production line, such as Figure 1 As shown, the extrusion device 100 includes an extruder 10, a screen changer 20, a metering pump 30 and an extrusion die 40 which are connected in sequence from front to back. The extruder 10 stirs, shears and conveys the PE raw material. The melted and plasticized material is filtered by the screen changer 20 and then pumped to the extrusion die 40 by the metering pump 30 to be extruded through the die opening of the extrusion die 40.
[0028] The extruder 10 includes a barrel 1 , an extrusion screw 2 rotatably disposed in the barrel 1 about its own axis, a motor 3 driving the extrusion screw 2 to rotate, and a vacuum system 4 connected to the barrel 1 .
[0029] like Figure 2 As shown, the barrel 1 is provided with a feed port 11 for materials to enter the barrel 1 , a discharge port 12 connected to a metering pump 30 , and an exhaust port 13 connected to a vacuum system 4 .
[0030] like Figure 4 As shown, the extrusion screw 2 includes a rod body 21 extending from front to back and a main thread 22 extending spirally along the rod body 21. The rod body 21 is composed of a feed section 211, a compression section 212, a first homogenization section 213, a barrier section 214, an exhaust section 215, and a second homogenization section 216 from front to back. The main thread 22 is distributed in the feed section 211, the compression section 212, the first homogenization section 213, the exhaust section 215, and the second homogenization section 216. The outer diameter of the main thread 22 is equal in each section. The position of the feed port 11 corresponds to the feed section 211, and the position of the exhaust port 13 corresponds to the exhaust section 215.
[0031] The bottom diameter of the feed section 211 remains constant from front to back, the bottom diameter of the compression section 212 gradually increases from front to back, the bottom diameter of the first homogenizing section 213 remains constant from front to back, the bottom diameter of the feed section 211 is equal to the minimum bottom diameter of the compression section 212, and the bottom diameter of the first homogenizing section 213 is equal to the maximum bottom diameter of the compression section 212. The main thread 22 has the same lead in the feed section 211, the compression section 212 and the first homogenizing section 213.
[0032] The material enters the barrel 1 from the feed port 11. Under the action of the inner wall of the barrel 1 and the main thread 22 on the feed section 211, the material is compacted in the thread groove on the feed section 211. The extrusion screw 2 rotates around its own axis under the drive of the motor 3 to convey the material in the thread groove in a positive direction and convey the material to the compression section 212. As the bottom diameter of the compression section 212 gradually increases, the volume of the thread groove of the main thread 22 in the compression section 212 gradually decreases, and the material is compressed and conveyed to the first homogenizing section 213. The first homogenizing section 213 stabilizes the conveying pressure of the material.
[0033] The length of the feed section 211 is greater than that of other sections, and the first homogenizing section 213 is less than that of other sections. The longer feed section 211 increases the material intake of the extrusion screw 2 and increases the output of the extruder 10.
[0034] like Figure 6 As shown, the barrier section 214 includes a pair of barrier groups 23 arranged in sequence from front to back and an annular groove 24 arranged between the pair of barrier groups 23. Each barrier group 23 includes a plurality of material grooves 231 and a plurality of barriers 232 arranged in sequence along the circumference of the rod body 21. Each material groove 231 is aligned with the axis X of the rod body 21. 1 It has an angle θ, and in the embodiment of the present application, 10°<θ<20°, a barrier 232 is arranged between two adjacent material troughs 231, and the annular groove 24 is arranged around a circle of the barrier section 214. Each material trough 231 is connected to the annular groove 24, and the bottom of the material trough 231 is located on the outside of the bottom of the annular groove 24. When the extrusion screw 2 rotates, the material passes through the barrier 232 from the material trough 231 and enters the material trough 231 downstream in the rotation direction. The material is gathered in the annular groove 24 after being sheared by the barrier 232 of the barrier group 23 on the front side and the inner wall of the barrel 1, and then dispersed into the material trough 231 of the barrier group 23 on the rear side. After being sheared by the barrier 232 of the barrier group 23 on the rear side and the inner wall of the barrel 1, the material enters the exhaust section 215 on the rear side; the material is fully sheared and stirred in the barrier section 214 to improve the plasticization efficiency; the cooperation of a pair of barrier groups 23 and the annular groove 24 of the barrier section 214 makes the material dispersed more evenly, thereby improving the plasticization effect.
[0035] like Figure 4As shown, the bottom diameter of the exhaust section 215 is smaller than the bottom diameters of other sections, and the exhaust section 215 is also provided with a secondary thread 25 extending spirally along the exhaust section 215. The secondary thread 25 and the main thread 22 are arranged alternately from front to back in the exhaust section 215, and the outer diameter of the secondary thread 25 is equal to the outer diameter of the main thread 22. The lead of the main thread 22 of the exhaust section 215 is greater than the lead of the main thread 22 of the feed section 211, and the lead of the secondary thread 25 is equal to the lead of the main thread 22 of the exhaust section 215; the depth of the thread groove of the main thread 22 and the secondary thread 25 in the exhaust section 215 is deeper, and the material can release a large amount of gas in the exhaust section 215. The released gas is transported to the vacuum system 4 by the exhaust port 13, reducing the gas content in the material, avoiding bubbles and impurities in the product extruded by the downstream extrusion die 40, and improving the quality of the product.
[0036] The bottom diameter of the second homogenizing section 213 remains unchanged, and the lead and outer diameter of the main thread 22 in the second homogenizing section 213 remain unchanged, so the volume of the thread groove of the main thread 22 in the second homogenizing section 213 remains unchanged from front to back. After the material releases gas in the exhaust section 215, it is evenly stirred in the second homogenizing section 213 and the extrusion pressure is stabilized.
[0037] The compression ratio of the extrusion screw 2 is 2.3-2.5. The appropriate compression ratio further improves the plasticizing effect of the extrusion screw, making the extruder suitable for the production of PE drainage boards.
[0038] like Figure 5 As shown, a flow channel 210 communicating with an external fluid is provided inside the feed section 211 , and oil or water flows through the flow channel 210 to adjust the temperature of the feed section 211 , which is beneficial to the discharge of materials at the feed port 11 and avoids bridging of materials at the feed port 11 .
[0039] like Figure 3 As shown, a cooling channel 14 is also provided on the barrel 1 . The cooling channel 14 is arranged adjacent to the feed port 11 to reduce the temperature at the feed port 11 , and cooperates with the channel 210 of the feed section 211 to improve the feeding efficiency of the feed port 11 .
[0040] like Figure 1 As shown, a plurality of temperature control components 5 are arranged on the barrel 1, and the barrel 1 is divided into a plurality of areas from front to back, each area is equipped with a temperature control component 5, and each temperature control component 5 includes a temperature sensor (not shown in the figure) for measuring the temperature of the corresponding area and a fan 51 for reducing the temperature of the corresponding area, and the fan 51 is connected with the corresponding temperature sensor signal.
[0041] The extruder 10 further comprises a frame 6, on which the barrel 1, the motor 3 and the vacuum system 4 are all mounted, thereby reducing the floor space of the equipment and improving the appearance of the equipment.
[0042] The metering pump 30 and the extrusion die 40 are arranged on the same die frame 50. When the extrusion screw 2 of the extruder is maintained, the metering pump 30 and the extrusion die 40 can be moved away as a whole, which saves space and reduces installation time.
[0043] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, and the scope of protection required by the present application is defined by the attached claims, description and their equivalents.
Claims
1. An extrusion device for a drainage board production line, characterized in that: The invention comprises an extruder, a screen changer, a metering pump and an extrusion die which are sequentially connected from front to back, wherein the extruder comprises a barrel, an extrusion screw which is rotatably arranged in the barrel around its own axis, a motor for driving the extrusion screw to rotate and a vacuum system connected to the barrel; the extrusion screw comprises a rod body extending from front to back and a main thread spirally extending along the rod body, the compression ratio of the extrusion screw is 2.3 to 2.5, the rod body is sequentially divided into a feed section, a compression section, a first homogenizing section, a barrier section, an exhaust section and a second homogenizing section from front to back, the main threads are distributed in the feed section, the compression section, the first homogenizing section, the exhaust section and the second homogenizing section, the bottom diameter of the compression section is It gradually increases from front to back, the bottom diameter of the exhaust section is smaller than the bottom diameters of other sections, and a spirally extended secondary thread is also provided on the exhaust section, and the secondary thread and the main thread are alternately arranged from front to back in the exhaust section; the barrier section includes a pair of barrier groups arranged in sequence from front to back and an annular groove arranged between the pair of barrier groups, each of the barrier groups includes a plurality of material troughs and a plurality of barriers arranged in sequence along the circumference of the rod body, each of the material troughs has an angle greater than 0° with the axial line of the rod body, a barrier is arranged between two adjacent material troughs, the annular groove is arranged around a circle of the barrier section, and each of the material troughs is connected to the annular groove.
2. The extrusion device according to claim 1, characterized in that The outer diameter of the main thread is consistent in each section, and the outer diameter of the secondary thread is equal to the outer diameter of the main thread.
3. The extrusion device according to claim 2, characterized in that: The lead of the main thread of the feed section, the lead of the main thread of the compression section, the lead of the main thread of the first homogenizing section and the lead of the main thread of the second homogenizing section are consistent, and the lead of the main thread of the exhaust section is greater than the lead of the main thread of the feed section.
4. The extrusion device according to claim 1, characterized in that The length of the feeding section is greater than the lengths of the other sections, and the length of the first homogenizing section is less than the lengths of the other sections.
5. The extrusion device according to claim 1, characterized in that: The groove bottom of the material groove is located outside the groove bottom of the annular groove.
6. The extrusion device according to claim 1, characterized in that: The angle is 10°-20°.
7. The extrusion device according to claim 1, characterized in that A flow channel communicating with an external fluid is provided inside the feed section, and oil or water flows through the flow channel.
8. The extrusion device according to claim 1, characterized in that The barrel is provided with a feed port and an exhaust port, the position of the feed port corresponds to the feed section, a cooling channel is opened on the barrel, and the cooling channel is arranged adjacent to the feed port; the position of the exhaust port corresponds to the exhaust section, and the exhaust port is connected to the vacuum system.
9. The extrusion device according to claim 1, characterized in that: The barrel is provided with a plurality of temperature control components, and the barrel is divided into a plurality of areas from front to back, each area is equipped with a temperature control component, each temperature control component comprises a temperature sensor for measuring the temperature of the corresponding area and a fan for reducing the temperature of the corresponding area, and the fan is connected with the corresponding temperature sensor signal.
10. The extrusion device according to claim 1, characterized in that The metering pump and the extrusion die are arranged on a die frame.