A twin-screw cooling extruder

Abstract

The present application relates to the technical field of processing equipment, and discloses a twin-screw cooling extruder, which includes an extrusion mechanism, a cooling mechanism and a driving mechanism. The extrusion mechanism includes a feeding barrel and two spiral conveying rods. The feeding barrel is provided with a feed port and a discharge port, and the feed port and the discharge port are respectively located near the two ends of the length direction of the feeding barrel. The two spiral conveying rods are both rotatably connected to the feeding barrel, and the rotation axis of the spiral conveying rod is parallel to the length direction of the feeding barrel. The driving mechanism is connected to the spiral conveying rod in a transmission manner. The cooling mechanism includes a first cooling component and a second cooling component. The first cooling component includes a cooling cylinder sleeved on the outside of the feeding barrel, and a cooling cavity is provided in the rod body of the spiral conveying rod along its length direction. The cooling cavity is connected to the second cooling component, and the second cooling component is used to circulate cooling water in the cooling cavity. The present application has the effect of alleviating the problem of poor cooling effect inside the barrel of the extruder.

Description

Technical Field

[0001] The present application relates to the field of processing equipment, and in particular to a twin-screw cooling extruder. Background Art

[0002] The main function of a twin-screw extruder is to form a continuous and homogeneous tubular product from a molten polymer through the extrusion process. Compared with a single-screw extruder, a twin-screw extruder has a better mixing effect and is therefore widely used in many fields.

[0003] During the operation of the twin-screw extruder, there is frictional shear heat generated by the relative movement between the material and the inner wall of the barrel, the material and the screw, and the material and the material. As time goes by, a large amount of heat accumulates, causing the temperature inside the barrel to rise, affecting the movement of the material in the barrel and the extrusion effect.

[0004] At present, the Chinese utility model patent with announcement number CN210999922U discloses a barrel cooling device for a twin-screw extruder, including a base and an extruder, the top of the base is fixedly connected to the bottom of the extruder, and the barrel cooling device for the twin-screw extruder is fixedly connected to the barrel through the right side of the extruder, and a cooling water pipe is provided on the surface of the barrel, a cooling plate is fixedly connected to the surface of the barrel, a mounting plate is fixedly connected to the inside of the cooling plate, and a refrigeration fin is provided inside the mounting plate, and the cooling water pipe and the cooling plate provided on the surface of the barrel are used to cool the barrel at the same time.

[0005] With respect to the above-mentioned related technologies, the inventors believe that cooling the barrel by using cooling water pipes and cooling plates arranged on the surface of the barrel can only cool the barrel part of the extruder, and there is a defect that the cooling effect inside the barrel is not good. Utility Model Content

[0006] In order to alleviate the problem of poor cooling effect inside the extruder barrel, the present application provides a twin-screw cooling extruder.

[0007] The present application provides a twin-screw cooling extruder, which adopts the following technical solution:

[0008] A twin-screw cooling extruder comprises an extrusion mechanism, a cooling mechanism and a driving mechanism, the extrusion mechanism comprises a feeding barrel and two spiral conveying rods, the feeding barrel is provided with a feed port and a discharge port, the feed port and the discharge port are respectively located near the two ends of the length direction of the feeding barrel, the two spiral conveying rods are rotatably connected to the feeding barrel, the rotation axis of the spiral conveying rod is parallel to the length direction of the feeding barrel, the driving mechanism is transmission-connected to the spiral conveying rods, the cooling mechanism comprises a first cooling assembly and a second cooling assembly, the first cooling assembly comprises a cooling cylinder sleeved on the outside of the feeding barrel, a cooling cavity is provided in the rod body of the spiral conveying rod along its length direction, the cooling cavity is connected to the second cooling assembly, and the second cooling assembly is used to circulate cooling water in the cooling cavity.

[0009] By adopting the above technical solution, a cooling cylinder is sleeved on the outside of the feeding barrel, and the cooling cylinder is used to cool the outside of the feeding barrel; at the same time, a cooling chamber is opened in the rod body of the spiral conveying rod, and cooling water is circulated in the cooling chamber by a second cooling component. By circulating cooling water in the cooling chamber, the temperature of the spiral conveying rod is reduced, the cooling effect on the inside of the feeding barrel is improved, and the influence of the increase in the internal temperature of the feeding barrel on the extrusion effect of the extruder is reduced.

[0010] Optionally, a water inlet and a water outlet are respectively provided near both ends of the cooling cylinder in the length direction, the water inlet is connected to a water collecting tank through a water pump, and the water outlet is connected to the water collecting tank.

[0011] By adopting the above technical solution, a water pump is used to circulate the cooling water in the water collecting tank in the cooling cylinder, thereby cooling the feeding cylinder.

[0012] Optionally, the water inlet is located on a side of the cooling cylinder close to the feed inlet, and the water outlet is located on a side of the cooling cylinder close to the discharge outlet.

[0013] By adopting the above technical solution, the water inlet is set on the side of the cooling cylinder close to the feed port, and the water outlet is set on the side of the cooling cylinder close to the discharge port, so that the cooling water flows from the end of the feeding barrel with a lower temperature to the end of the feeding barrel with a higher temperature, making the cooling effect of the cooling cylinder on the feeding barrel more balanced.

[0014] Optionally, a water baffle is provided in the cooling cylinder, and the water baffle is fixedly connected to the inner wall of the cooling cylinder. The water baffle is arranged at an angle, and the smaller angle between the plane where the water baffle is located and the axis of the cooling cylinder is angle A, and angle A is between 30° and 45°.

[0015] By adopting the above technical solution, a water baffle is set in the cooling cylinder, and the water baffle is used to intensify the turbulence of the cooling water flowing in the cooling cylinder, thereby improving the heat transfer film coefficient of the cooling cylinder, thereby improving the cooling effect on the feeding barrel.

[0016] Optionally, the second cooling assembly includes a drainage box, a drainage pipe and a water supply pipe, the drainage box is fixedly connected to one end of the feeding bucket near the discharge port, one end of the spiral conveying rod passes through the feeding bucket and is inserted into the drainage box, the drainage pipe is inserted into the cooling cavity by the end of the spiral conveying rod located in the drainage box, the drainage pipe is coaxially fixedly connected to the rod body of the spiral conveying rod, one end of the drainage pipe is located in the cooling cavity, the other end of the drainage pipe is connected to the water supply pipe through a rotary joint, the water supply pipe is connected to the water pump, a drain outlet is provided on the rod body of the bolt conveying rod, the drain outlet is connected to the cooling cavity, the drain outlet is located in the drainage box, one end of the drainage pipe inserted into the cooling cavity is close to the end of the cooling cavity away from the drain outlet, and the drainage box is connected to the water collecting tank.

[0017] By adopting the above technical solution, a water pump is used to pump cooling water into the drainage pipe through the water supply pipe, and the cooling water flows into the cooling chamber from one end of the drainage pipe inserted into the cooling chamber, and the cooling water flows from the end of the cooling chamber away from the drain outlet to the end of the cooling chamber close to the drain outlet. In the process of flowing in the cooling chamber, the cooling water exchanges heat with the spiral conveying rod, thereby reducing the temperature of the spiral conveying rod and achieving the effect of cooling the inside of the feeding barrel; the cooling water in the cooling chamber flows from the drain outlet into the drainage box and then flows back into the water collecting tank. By arranging the drainage pipe in the cooling chamber, the cooling water is fully in contact with the inner wall of the cooling chamber, thereby improving the heat exchange efficiency of the second cooling component.

[0018] Optionally, a spoiler is provided in the drainage tube, and the spoiler is fixedly connected to the inner wall of the drainage tube.

[0019] By adopting the above technical solution, a turbulator is set in the drainage pipe, and the turbulence of the cooling water flowing in the cooling chamber is intensified by the turbulator, thereby improving the heat transfer film coefficient of the spiral conveying rod, thereby improving the cooling effect on the feeding barrel.

[0020] Optionally, the water collecting tank includes a box body for containing cooling water, and a water filter net is arranged in the water collecting tank. The water filter net is arranged horizontally, and the water filter net divides the interior of the box body into an upper box body and a lower box body. The water inlet of the water pump is connected to the lower box body, and the water outlet and the drainage box body are connected to the upper box body.

[0021] By adopting the above technical solution, a water filter is set in the box body, and the cooling water returning to the water collecting tank is filtered by the water filter, thereby improving the service life of the water pump.

[0022] Optionally, water-drying windows are provided on two opposite side walls of the box body, and the water-drying windows are provided near the top of the box body. A fan is provided on one of the water-drying windows, and an overflow port is provided below the water-drying window.

[0023] By adopting the above technical solution, water-drying windows are opened on the two opposite walls of the water collecting tank, and a fan is installed on one of the water-drying windows to accelerate the air flow in the box and increase the cooling speed of the cooling water in the water collecting tank; by opening an overflow port below the water-drying window, the safety of the fan is improved.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. A cooling cylinder is installed on the outside of the feeding barrel to cool the outside of the feeding barrel. At the same time, a cooling chamber is opened in the rod body of the spiral conveying rod. A second cooling component is used to circulate cooling water in the cooling chamber. By circulating cooling water in the cooling chamber, the temperature of the spiral conveying rod is reduced, the cooling effect on the inside of the feeding barrel is improved, and the influence of the increase in the internal temperature of the feeding barrel on the extrusion effect of the extruder is reduced.

[0026] 2. By setting the water inlet on the side of the cooling barrel close to the feed port and the water outlet on the side of the cooling barrel close to the discharge port, the cooling water flows from the lower temperature end of the feeding barrel to the higher temperature end of the feeding barrel, making the cooling effect of the cooling barrel on the feeding barrel more balanced;

[0027] 3. By setting a spoiler in the drainage pipe, the spoiler is used to intensify the turbulence of the cooling water flowing in the cooling chamber, thereby increasing the heat transfer film coefficient of the spiral conveying rod, thereby improving the cooling effect on the feeding barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0030] Figure 2 This is a schematic structural diagram of the first cooling component in an embodiment of the present application;

[0031] Figure 3 This is a schematic structural diagram of the spiral conveying rod portion in an embodiment of the present application;

[0032] Figure 4 It is a structural schematic diagram of the water collecting tank part in the embodiment of the present application.

[0033] Figure numerals: 100, extrusion mechanism; 110, feeding barrel; 111, feed port; 112, discharge port; 120, screw conveying rod; 121, cooling chamber; 122, drain outlet; 200, cooling mechanism; 210, first cooling component; 211, cooling cylinder; 212, water inlet; 213, water outlet; 214, water baffle; 220, second cooling component; 221, drainage box; 222, drainage pipe; 223, water supply pipe; 230, water pump; 240, water collecting box; 241, box; 242, water filter net; 243, water drying window; 244, fan; 245, overflow; 300, driving mechanism. DETAILED DESCRIPTION

[0034] In order to more clearly explain the overall concept of this application, the following Figure 1-4 This application is described in further detail.

[0035] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0036] The present application discloses a twin-screw cooling extruder. Figure 1 and Figure 2 A twin-screw cooling extruder includes an extrusion mechanism 100, a cooling mechanism 200, and a drive mechanism 300. The extrusion mechanism 100 includes a feed barrel 110 and two screw conveying rods 120. The feed barrel 110 is provided with a feed inlet 111 and a discharge port 112. The feed inlet 111 and the discharge port 112 are respectively located near the ends of the length direction of the feed barrel 110. The two screw conveying rods 120 are both rotatably connected to the feed barrel 110, and the rotation axis of the screw conveying rods 120 is parallel to the length direction of the feed barrel 110. The drive mechanism 300 is transmission-connected to the screw conveying rods 120. The cooling mechanism 200 includes a first cooling component 210 and a second cooling component 220. The first cooling component 210 includes a cooling cylinder 211 that is sleeved on the outside of the feeding barrel 110. The spiral conveying rod 120 has a cooling cavity 121 extending in the length direction. The cooling cavity 121 is connected to the second cooling component 220. The second cooling component 220 is used to circulate cooling water in the cooling cavity 121.

[0037] By arranging a cooling cylinder 211 on the outside of the feeding barrel 110, the cooling cylinder 211 is used to cool the outside of the feeding barrel 110; at the same time, a cooling chamber 121 is opened in the rod body of the spiral conveying rod 120, and cooling water is circulated in the cooling chamber 121 by using a second cooling component 220. By circulating cooling water in the cooling chamber 121, the temperature of the spiral conveying rod 120 is reduced, the cooling effect on the inside of the feeding barrel 110 is improved, and the influence of the increase in the internal temperature of the feeding barrel 110 on the extrusion effect of the extruder is reduced.

[0038] Reference Figure 1 and Figure 2 The cooling cylinder 211 is provided with a water inlet 212 and a water outlet 213 near both ends of the length direction. The water inlet 212 is connected to the water collecting tank 240 through a water pump 230, and the water outlet 213 is connected to the water collecting tank 240. The water pump 230 is used to circulate the cooling water in the water collecting tank 240 in the cooling cylinder 211, thereby cooling the feeding cylinder.

[0039] Reference Figure 1 and Figure 2 The water inlet 212 is located on the side of the cooling cylinder 211 close to the feed inlet 111, and the water outlet 213 is located on the side of the cooling cylinder 211 close to the discharge outlet 112. By arranging the water inlet 212 on the side of the cooling cylinder 211 close to the feed inlet 111 and the water outlet 213 on the side of the cooling cylinder 211 close to the discharge outlet 112, the cooling water flows from the lower temperature end of the feeding barrel 110 to the higher temperature end of the feeding barrel 110, making the cooling effect of the cooling cylinder 211 on the feeding barrel more balanced.

[0040] Reference Figure 1 and Figure 2 A water baffle 214 is provided in the cooling cylinder 211. The water baffle 214 is fixedly connected to the inner wall of the cooling cylinder 211. The water baffle 214 is tilted. The smaller angle between the plane where the water baffle 214 is located and the axis of the cooling cylinder 211 is angle A. Angle A is between 30° and 45°. In a preferred embodiment, angle A is 45°.

[0041] By arranging a water baffle 214 in the cooling cylinder 211 , the water baffle 214 is used to increase the turbulence of the cooling water flowing in the cooling cylinder 211 , thereby increasing the heat transfer film coefficient of the cooling cylinder 211 and improving the cooling effect on the feeding barrel 110 .

[0042] Reference Figure 2 and Figure 3The second cooling assembly 220 includes a drainage box 221, a drainage pipe 222 and a water supply pipe 223. The drainage box 221 is fixedly connected to one end of the feeding barrel 110 near the discharge port 112. One end of the spiral conveying rod 120 passes through the feeding barrel 110 and is inserted into the drainage box 221. The drainage pipe 222 is inserted into the cooling chamber 121 by the end of the spiral conveying rod 120 located in the drainage box 221. The drainage pipe 222 is coaxially fixedly connected to the rod body of the spiral conveying rod 120. The drainage pipe One end of 222 is located in the cooling chamber 121, and the other end of the drainage pipe 222 is connected to the water supply pipe 223 through a rotary joint. The water supply pipe 223 is connected to the water pump 230. A drain port 122 is provided on the rod body of the bolt conveying rod. The drain port 122 is connected to the cooling chamber 121. The drain port 122 is located in the drainage box body 221. One end of the drainage pipe 222 is inserted into the cooling chamber 121, close to the cooling chamber 121 and away from the end of the drain port 122. The drainage box body 221 is connected to the water collecting tank 240.

[0043] By utilizing the water pump 230 to pump the cooling water into the drainage pipe 222 through the water supply pipe 223, the cooling water flows into the cooling chamber 121 from one end of the drainage pipe 222 inserted into the cooling chamber 121, and the cooling water flows from the end of the cooling chamber 121 away from the drain port 122 to the end of the cooling chamber 121 close to the drain port 122. During the flow of the cooling water in the cooling chamber 121, the cooling water exchanges heat with the screw conveying rod 120, thereby reducing the temperature of the screw conveying rod 120 and achieving the effect of cooling the interior of the feeding barrel 110; the cooling water in the cooling chamber 121 flows into the drainage box 221 from the drain port 122 and then flows back into the water collecting tank 240. By arranging the drainage pipe 222 in the cooling chamber 121, the cooling water can fully contact the inner wall of the cooling chamber 121, thereby improving the heat exchange efficiency of the second cooling component 220.

[0044] Reference Figure 2 and Figure 3 A spoiler is installed in the drainage tube 222 and is fixedly connected to the inner wall of the drainage tube 222. By installing the spoiler in the drainage tube 222, the turbulence of the cooling water flowing in the cooling chamber 121 is increased by the spoiler, thereby increasing the heat transfer film coefficient of the spiral conveying rod 120, thereby improving the cooling effect on the feeding barrel 110.

[0045] Reference Figure 4The water collection tank 240 includes a housing 241 for holding cooling water. A water filter 242 is installed within the water collection tank 240. The filter 242 is horizontally arranged and fixedly connected to the inner wall of the housing 241. The filter 242 divides the interior of the housing 241 into an upper housing 241 and a lower housing 241. The water inlet 212 of the water pump 230 is connected to the lower housing 241, while the water outlet 213 and the drainage housing 221 are connected to the upper housing 241. By installing the filter 242 within the housing 241, the cooling water returning to the water collection tank 240 is filtered by the filter 242, thereby extending the service life of the water pump 230.

[0046] Reference Figure 4 Water-draining windows 243 are provided on opposite sides of the housing 241, located near the top of the housing 241. A fan 244 is mounted on one of the windows 243, which is fixedly connected to the housing 241. An overflow port 245 is provided on the housing 241, located below the water-draining windows 243. Providing water-draining windows 243 on opposite sides of the water collection tank 240 and installing a fan 244 on one of the windows 243 accelerates air flow within the housing 241 and improves the cooling rate of the cooling water within the water collection tank 240. Furthermore, providing an overflow port 245 below the water-draining windows 243 improves the safety of the fan 244.

[0047] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A twin-screw cooling extruder, characterized in that: It includes an extrusion mechanism, a cooling mechanism and a driving mechanism, the extrusion mechanism includes a feeding barrel and two screw conveying rods, the feeding barrel is provided with a feed port and a discharge port, the feed port and the discharge port are respectively located near the two ends of the length direction of the feeding barrel, the two screw conveying rods are rotatably connected to the feeding barrel, the rotation axis of the screw conveying rod is parallel to the length direction of the feeding barrel, the driving mechanism is transmission-connected to the screw conveying rods, the cooling mechanism includes a first cooling component and a second cooling component, the first cooling component includes a cooling cylinder sleeved on the outside of the feeding barrel, the rod body of the screw conveying rod is provided with a cooling cavity extending in its length direction, the cooling cavity is connected to the second cooling component, and the second cooling component is used for circulating cooling water in the cooling cavity.

2. A twin-screw cooling extruder according to claim 1, characterized in that: The cooling cylinder is provided with a water inlet and a water outlet at positions near both ends in the length direction, respectively. The water inlet is connected to a water collecting tank through a water pump, and the water outlet is connected to the water collecting tank.

3. A twin-screw cooling extruder according to claim 2, characterized in that: The water inlet is located on a side of the cooling cylinder close to the feed inlet, and the water outlet is located on a side of the cooling cylinder close to the discharge outlet.

4. A twin-screw cooling extruder according to claim 2, characterized in that: A water baffle is arranged in the cooling cylinder and fixedly connected to the inner wall of the cooling cylinder. The water baffle is arranged tilted, and the smaller angle between the plane where the water baffle is located and the axis of the cooling cylinder is angle A, which is between 30° and 45°.

5. A twin-screw cooling extruder according to claim 1, characterized in that: The second cooling component includes a drainage box, a drainage pipe and a water supply pipe. The drainage box is fixedly connected to one end of the feeding barrel near the discharge port, one end of the spiral conveying rod passes through the feeding barrel and is inserted into the drainage box. The drainage pipe is inserted into the cooling cavity by the end of the spiral conveying rod located in the drainage box. The drainage pipe is coaxially fixedly connected to the rod body of the spiral conveying rod. One end of the drainage pipe is located in the cooling cavity, and the other end of the drainage pipe is connected to the water supply pipe through a rotating joint. The water supply pipe is connected to a water pump. A drain outlet is provided on the rod body of the spiral conveying rod, and the drain outlet is connected to the cooling cavity. The drain outlet is located in the drainage box, and one end of the drainage pipe inserted into the cooling cavity is close to the end of the cooling cavity away from the drain outlet, and the drainage box is connected to a water collecting tank.

6. A twin-screw cooling extruder according to claim 5, characterized in that: A spoiler is arranged in the drainage tube, and the spoiler is fixedly connected to the inner wall of the drainage tube.

7. A twin-screw cooling extruder according to claim 2, characterized in that: The water collecting tank includes a box body for containing cooling water. A water filter net is arranged in the water collecting tank. The water filter net is arranged horizontally. The water filter net divides the interior of the box body into an upper box body and a lower box body. The water inlet of the water pump is connected to the lower box body, and the water outlet and the drainage box body are connected to the upper box body.

8. A twin-screw cooling extruder according to claim 7, characterized in that: Water-drying windows are provided on two opposite side walls of the box body, and the water-drying windows are provided near the top of the box body. A fan is provided on one of the water-drying windows, and an overflow port is provided below the water-drying window.

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