Extruder for waterproof roll production
By designing the extrusion screw of the multifunctional section, the problems of insufficient plasticization of materials and small extrusion in the prior art are solved, and high-yield, stable and high-speed extrusion effects are achieved to meet market demand.
Patent Information
- Application Number
- CN202421804615.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The extrusion screws of existing extruders do not sufficiently plasticize the material, and the extrusion volume is small, which cannot meet the demands of high speed and high yield.
An extruder for the production of waterproof coils is designed, and the extrusion screw includes multiple functional sections, such as feed section, separation section, metering section, barrier section and mixing section. Through the design of thread structure and separation tank, effective shear, stirring and plasticization of the material is achieved.
A high-yield extrusion volume of 900kg/hour was achieved, and the production was stable, high-speed and high-yield, meeting the current market demand.
Smart Images
Figure CN222832344U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of plastic film production equipment, and in particular to an extruder for producing waterproof coiled materials. Background Art
[0002] In the production process of waterproof membrane, the extrusion screw of the extruder is required to shear and stir the raw materials to produce fully plasticized materials. The extrusion screw of the current extruder does not fully plasticize the materials, and the extrusion volume is small, which cannot meet the needs of high speed and high production. Summary of the invention
[0003] In order to solve the above-mentioned technical problems, the purpose of this application is to provide an extruder for the production of waterproof membranes.
[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an extruder for the production of waterproof coiled materials, comprising a barrel, an extrusion screw rotatably arranged in the barrel and a driving device connected to the extrusion screw, the extrusion screw comprising a rod body extending from front to back and a thread extending spirally along the rod body, the rod body comprising a feeding section, a separation section, a metering section, a first barrier section, a mixing section and a second barrier section distributed in sequence from front to back, the outer diameter of the thread being unchanged distributed in the feeding section, the separation section and the metering section, the feeding section comprising a first feeding branch section, a compression section and a second feeding branch section distributed in sequence from front to back, the bottom diameters of the first feeding branch section and the second feeding branch section being consistent, the compression section The bottom diameter is larger than the bottom diameter of the first feed branch section; a spirally extending separation groove is provided on the thread of the separation section, and the volume of the separation groove gradually increases from front to back, and the bottom diameter of the metering section is smaller than the bottom diameter of the second feed branch section; the first barrier section and the second barrier section are respectively provided with a plurality of feed grooves and a plurality of discharge grooves, and the plurality of feed grooves and the plurality of discharge grooves all extend spirally along the rod body, and in the circumference of the rod body, the feed grooves and the discharge grooves are alternately distributed; the mixing section includes mixing groups arranged in sequence from front to back, and each of the mixing groups includes a plurality of mixing parts protruding radially outward, and the plurality of mixing parts are distributed in sequence along the circumference of the rod body.
[0005] In the above technical solution, it is further preferred that the length of the separation section is greater than the length of the feeding section, and the length of the feeding section is greater than the lengths of the metering section, the first barrier section, the mixing section and the second barrier section.
[0006] In the above technical solution, it is further preferred that the separation groove separates the thread into a main ridge and a secondary ridge extending in a spiral manner, the outer diameter of the main ridge is larger than the outer diameter of the secondary ridge; the rear end face of the main ridge, the surface of the rod body and the front end face of the secondary ridge define the separation groove, the rear end face of the secondary ridge, the surface of the rod body and the front end face of the main ridge define a spirally extending material groove, and the volume of the material groove gradually decreases from front to back.
[0007] In the above technical solution, it is further preferred that the width of the separation groove gradually increases from front to back, and the depth of the separation groove gradually increases from front to back.
[0008] In the above technical solution, it is further preferred that the width of the material trough gradually decreases from front to back, and the depth of the material trough gradually decreases from front to back.
[0009] In the above technical scheme, it is further preferred that the barrel has a feed port and a discharge port, a lower hopper is installed at the feed port, a metering pump and an extrusion die are arranged at the discharge port, the metering pump fluid is connected between the upper discharge port and the extrusion die, and the feed port corresponds to the position of the feed section.
[0010] In the above technical scheme, it is further preferred that the barrel is divided into a water-cooling section and an extrusion section from front to back, the water-cooling section corresponds to the position of the feed section, the water-cooling section includes a water-cooling jacket and a water-cooling core jacket, the water-cooling jacket is coaxially sleeved on the water-cooling core jacket, the outer wall surface of the water-cooling core jacket is provided with a cooling groove extending spirally from front to back, the inner wall surface of the water-cooling jacket and the cooling groove define a cooling channel for unidirectional conveying of coolant, and the cooling groove is arranged away from the feed port; the extrusion section includes an extrusion barrel, and the inner diameter of the extrusion barrel is consistent with the inner diameter of the water-cooling core jacket.
[0011] In the above technical solution, it is further preferred that the inner wall surface of the water-cooling core sleeve is provided with a plurality of spiral grooves extending spirally from front to rear.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] The extruder is designed for the raw materials of waterproof membranes, achieving a single-unit high-output extrusion rate of 900kg / hour. The extruder has stable, high-speed and high-yield production, meeting current market demand. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 A schematic diagram of the structure of an extruder for producing waterproofing membranes provided in an embodiment of the present application;
[0015] Figure 2 for Figure 1 Schematic diagram of the structure of the extrusion screw;
[0016] Figure 3 for Figure 2 A schematic diagram of the structure of the feed section in FIG.
[0017] Figure 4 for Figure 2 A schematic diagram of the structure of the first barrier segment in FIG.
[0018] Figure 5 for Figure 2 A schematic diagram of the structure of the mixing section in FIG.
[0019] Figure 6 for Figure 1 The structural diagram of the barrel in FIG.
[0020] Figure 7 for Figure 6 Schematic diagram of the structure of the water cooling section of the barrel.
[0021] Wherein: 100, extruder; 1, barrel; 101, feed port; 102, discharge port; 11, water-cooled jacket; 12, water-cooled core sleeve; 121, cooling trough; 122, spiral groove; 13, extrusion barrel; 2, extrusion screw; 21, rod body; 211, feed section; 2111, first feed branch section; 2112, compression section; 2113, second feed branch section; 212, separation section; 213, metering section; 214, first barrier section; 215, mixing section; 216, second barrier section; 22, thread; 221, main edge; 222, secondary edge; 23, separation trough; 24, material trough; 25, feed trough; 26, discharge trough; 27, mixing group; 271, mixing section; 3, driving device; 31, AC motor; 32, reduction box; 4, hopper; 5, elastic coupling. DETAILED DESCRIPTION
[0022] 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.
[0023] The "front" and "back" mentioned in this application are as follows Figure 1 Before and after shown.
[0024] The present application provides an extruder for producing waterproof coiled materials. The extruder is fluidically connected to an extrusion die, and provides a fully plasticized melt to the extrusion die, and the extrusion die extrudes the melt in a film form.
[0025] like Figure 1 As shown, the extruder 100 includes a barrel 1, an extrusion screw 2 rotatably disposed in the barrel 1, and a driving device 3 drivingly connected to the extrusion screw 2. The barrel 1 has a feed port 101 for raw materials to enter and a discharge port 102 for fully plasticized materials to be discharged. The extrusion screw 2 is rotatably disposed in the barrel 1 around its own axis under the drive of the driving device 3, and is used to forwardly convey the raw materials input from the feed port 101, shear and stir the raw materials evenly, and finally discharge the fully plasticized materials from the discharge port 102. The discharge port 102 of the barrel 1 is provided with a metering pump (not shown in the figure) connected to the barrel 1, and the metering pump is connected between the discharge port 102 and the extrusion die (not shown in the figure), and is used to control the flow rate of the material transported from the discharge port 102 to the extrusion die, so that the thickness of the product extruded by the extrusion die is uniform, and the quality of the product is improved.
[0026] like Figure 2 As shown, the extrusion screw 2 includes a rod body 21 extending from front to back and a thread 22 extending spirally along the rod body 21, the rod body 21 includes a feed section 211, a separation section 212, a metering section 213, a first barrier section 214, a mixing section 215 and a second barrier section 216 distributed in sequence from front to back, and the outer diameter of the thread 22 is unchangedly distributed in the feed section 211, the separation section 212 and the metering section 213.
[0027] like Figure 2 , 3 As shown, the feed section 211 includes a first feed branch section 2111, a compression section 2112 and a second feed branch section 2113 which are sequentially distributed from front to back. The bottom diameters of the first feed branch section 2111 and the second feed branch section 2113 are consistent, and the bottom diameter of the compression section 2112 is larger than the bottom diameter of the first feed branch section 2111. When the material enters the feed section 211, it is forwardly transported by the screw thread 22 of the first feed branch section 2111. When entering the compression section 2112, due to the increase in the bottom diameter of the compression section 2112, the volume of the material trough formed by the screw thread 22 in the compression section 2112 decreases, and the material is compressed in the compression section 2112. After the material is compressed, the screw thread 22 of the second feed branch section 2113 transports the material to the separation section 212. The process in which the feed section 211 first transports, then compresses, and then transports increases the material intake and material intake stability of the extrusion screw 2 per unit time, thereby improving the extrusion efficiency.
[0028] like Figure 2 As shown, a spirally extending separation groove 23 is provided on the thread 22 of the separation section 212, and the separation groove 23 separates the thread 22 into a spirally extending main edge 221 and a secondary edge 222. The outer diameter of the main edge 221 is larger than the outer diameter of the secondary edge 222 to form a height difference to achieve shearing and separation of the material; the material is subjected to severe shearing in the separation section 212, thereby increasing the temperature, and is melted and plasticized at high temperature. The molten material passes over the secondary edge 222 and enters the separation groove 23 to achieve solid-liquid separation of the material. The molten material is forwardly transported along the separation groove 23 to avoid excessive plasticization caused by staying in the separation section 212 for a long time, thereby improving the plasticizing effect of the extrusion screw. The rear end face of the main edge 221, the surface of the rod body 21 and the front end face of the secondary edge 222 define a separation groove 23, and the rear end face of the secondary edge 222, the surface of the rod body 21 and the front end face of the main edge 221 define a spirally extending material groove 24. The volume of the separation groove 23 gradually increases from front to back, and the volume of the material groove 24 gradually decreases from front to back. The solid material melts and plasticizes as it moves forward. The changes of the separation groove 23 and the material groove 24 are consistent with the changes of the material on the extrusion screw 2, thereby improving the plasticization efficiency and effectively avoiding excessive plasticization. Among them, the groove width and groove depth of the separation groove 23 gradually increase from front to back; the groove width and groove depth of the material groove 24 gradually decrease from front to back.
[0029] The length of the separation section 212 is greater than that of the feed section 211, and the length of the feed section 211 is greater than that of the metering section 213, the first barrier section 214, the mixing section 215 and the second barrier section 216; a longer feed section 211 helps to increase the material intake of the extrusion screw 2 and the output of the extruder; a longer separation section 212 allows the material to be fully plasticized, thereby improving the quality of the final product.
[0030] The metering section 213 has the shortest length, and its bottom diameter is constant from front to back and is larger than the bottom diameter of the second feed branch section 2113 . The metering section 213 with uniform volume stabilizes the pressure of the material output from the separation section 212 .
[0031] like Figure 2 , 4 As shown, the first barrier section 214 includes a plurality of feed slots 25 and a plurality of discharge slots 26, each of which extends spirally from front to back along the rod body 21, and the feed slots 25 and the discharge slots 26 are alternately distributed in the circumferential direction of the rod body 21. A barrier for shearing the material is formed between the feed slots 25 and the discharge slots 26, so that the material is plasticized again in the first barrier section 214.
[0032] like Figure 2 , 5As shown, the kneading section 215 includes kneading groups 27 arranged sequentially from front to back, each kneading group 27 includes a plurality of kneading parts 271 protruding radially outward, and the plurality of kneading parts 271 are sequentially distributed along the circumference of the rod body.
[0033] The structure of the second barrier segment 216 is consistent with that of the first barrier segment 214 , and will not be described in detail herein.
[0034] After the material has established a stable pressure in the metering section 213, it passes through the first barrier section 214, the mixing section 215 and the second barrier section 216 in sequence to achieve sufficient plasticization and mixing.
[0035] In the embodiment of the present application, the diameter of the extrusion screw is 90 mm and the aspect ratio is 42:1. A suitable extrusion screw effectively improves the extrusion output and extrusion efficiency.
[0036] like Figure 1 , 6 As shown, a lower hopper 4 is installed at the feed port 101 of the barrel 1, and the lower hopper 4 controls the flow rate of the raw material input into the feed port 101 to improve the feeding efficiency; the position of the feed port 101 corresponds to the position of the feed section 212 of the extrusion screw 2 to facilitate the feeding of the extruder.
[0037] like Figure 6 , 7 As shown, the barrel 1 is divided into a water cooling section and an extrusion section from front to back, the water cooling section corresponds to the position of the feed section 211, the water cooling section includes a water cooling jacket 11 and a water cooling core sleeve 12, the water cooling jacket 11 is coaxially sleeved on the water cooling core sleeve 12, and has an interference fit with the water cooling core sleeve 12; the outer wall surface of the water cooling core sleeve 12 is provided with a cooling groove 121 extending spirally from front to back, the inner wall surface of the water cooling jacket 11 and the cooling groove 121 define a cooling channel for unidirectional delivery of coolant, and the cooling groove 121 is arranged away from the feed port 101. Coolant is introduced into the cooling channel of the water cooling section to cool down the feed section 211, so as to avoid the high temperature of the feed port 101 causing the raw material to bridge at the feed port 101 and the raw material to melt in advance and burn due to overheating. The interior of the water-cooled core sleeve 12 has a channel for the extrusion screw 2 to rotate, and the channel is connected to the feed port 101; the inner wall surface of the water-cooled core sleeve 12 is provided with a plurality of spiral grooves 122 extending spirally from front to rear, and the plurality of spiral grooves 122 cooperate with the feed section 211 of the extrusion screw 2 to improve the feeding efficiency.
[0038] The extrusion section includes an extrusion barrel 13 extending in the front-to-back direction. The extrusion barrel 13 is connected to the rear side of the water-cooled core sleeve 12 . A channel for the extrusion screw 2 to rotate is formed inside the extrusion barrel 13 . The inner diameter of the extrusion barrel 13 is consistent with the inner diameter of the water-cooled core sleeve 12 .
[0039] The driving device 3 includes an AC motor 31 and a reduction gearbox 32. The extrusion screw 2 is connected to the reduction gearbox 32. The AC motor 31 drives the extrusion screw 2 to rotate through the reduction gearbox 32. The reduction gearbox 321 and the AC motor 31 are connected to each other through an elastic coupling 5 to stabilize the output of the AC motor 31 and improve the stability of the extruder.
[0040] The extruder is designed for the raw materials of waterproof membranes, achieving a single-unit high-output extrusion rate of 900kg / hour. The extruder has stable, high-speed and high-yield production, meeting current market demand.
[0041] 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 extruder for producing waterproof coiled materials, comprising a barrel, an extrusion screw rotatably disposed in the barrel, and a driving device connected to the extrusion screw, wherein the extrusion screw comprises a rod body extending from front to rear and a thread extending helically along the rod body, characterized in that: The rod body comprises a feed section, a separation section, a metering section, a first barrier section, a mixing section and a second barrier section which are sequentially distributed from front to back. The outer diameter of the thread is unchangedly distributed in the feed section, the separation section and the metering section. The feed section comprises a first feed branch section, a compression section and a second feed branch section which are sequentially distributed from front to back. The bottom diameters of the first feed branch section and the second feed branch section are consistent, and the bottom diameter of the compression section is larger than the bottom diameter of the first feed branch section. A spirally extending separation groove is provided on the thread of the separation section, and the volume of the separation groove increases from front to back. The diameter of the metering section gradually increases, and the bottom diameter of the metering section is smaller than the bottom diameter of the second feed branch section; the first barrier section and the second barrier section are respectively provided with a plurality of feed troughs and a plurality of discharge troughs, and the plurality of feed troughs and the plurality of discharge troughs all extend spirally along the rod body, and in the circumference of the rod body, the feed troughs and the discharge troughs are alternately distributed; the mixing section includes mixing groups arranged sequentially from front to back, and each of the mixing groups includes a plurality of mixing parts protruding radially outward, and the plurality of mixing parts are sequentially distributed along the circumference of the rod body.
2. The extruder according to claim 1, characterized in that The length of the separation section is greater than that of the feeding section, and the length of the feeding section is greater than that of the metering section, the first barrier section, the mixing section and the second barrier section.
3. The extruder according to claim 1, characterized in that The separation groove separates the thread into a main ridge and a secondary ridge extending in a spiral direction, wherein the outer diameter of the main ridge is greater than the outer diameter of the secondary ridge; the rear end face of the main ridge, the surface of the rod body and the front end face of the secondary ridge define the separation groove, and the rear end face of the secondary ridge, the surface of the rod body and the front end face of the main ridge define a material groove extending in a spiral direction, wherein the volume of the material groove gradually decreases from front to back.
4. The extruder according to claim 3, characterized in that The width of the separation groove gradually increases from front to back, and the depth of the separation groove gradually increases from front to back.
5. The extruder according to claim 3, characterized in that The width of the material trough gradually decreases from front to back, and the depth of the material trough gradually decreases from front to back.
6. The extruder according to claim 1, characterized in that The barrel has a feed port and a discharge port, a lower hopper is installed at the feed port, a metering pump and an extrusion die are arranged at the discharge port, the metering pump fluid is connected between the upper discharge port and the extrusion die, and the feed port corresponds to the position of the feed section.
7. The extruder according to claim 6, characterized in that The barrel is divided into a water-cooling section and an extrusion section from front to back, the water-cooling section corresponds to the position of the feed section, the water-cooling section includes a water-cooling outer jacket and a water-cooling core jacket, the water-cooling outer jacket is coaxially sleeved on the water-cooling core jacket, the outer wall surface of the water-cooling core jacket is provided with a cooling groove extending spirally from front to back, the inner wall surface of the water-cooling outer jacket and the cooling groove define a cooling channel for unidirectional conveying of coolant, and the cooling groove is arranged away from the feed port; the extrusion section includes an extrusion barrel, the inner diameter of the extrusion barrel is consistent with the inner diameter of the water-cooling core jacket.
8. The extruder according to claim 7, characterized in that The inner wall surface of the water-cooling core sleeve is provided with a plurality of spiral grooves extending spirally from front to back.