Screw extruder with screening function

Abstract

The utility model discloses a screw extruder with the screening function, relates to the technical field of extruders, and comprises a base main body, a plurality of support columns are fixedly arranged on the upper surface of the base main body, the tops of the plurality of support columns are fixedly connected with the same machine barrel, a screw is transversely arranged in the machine barrel, and a plurality of screw rods are fixedly arranged on the base main body. A fixing box is fixedly connected to the top of the machine barrel, through grooves communicating with each other are formed in the bottom of the fixing box and the top of the machine barrel, and a partition plate is longitudinally arranged in the middle of an inner cavity of the fixing box. The screening assembly is designed, the obliquely-arranged screening plate is used for grading raw materials, only particles with qualified sizes are allowed to enter the machine barrel, the uniformity of the raw materials of extruded plastic is ensured, the defects of cavities and sand holes in the surfaces of finished products are directly reduced, and the consistency of the products is improved; and meanwhile, large particles which do not pass through screening automatically slide into the crushing chamber along the screening plate, and enter the processing flow again after being subjected to secondary crushing, so that raw material waste is avoided, manual intervention is not needed, and closed-loop treatment is realized.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, specifically a screw extruder with screening function. Background Technology

[0002] Extruders are a type of plastic machinery. Based on the angle between the material flow direction at the die head and the screw centerline, the die head can be divided into right-angle die heads and angled die heads. Screw extruders rely on the pressure and shearing force generated by the rotation of the screw to fully plasticize and uniformly mix the material, which is then formed through a die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and less common multi-screw extruders and screwless extruders.

[0003] An existing patent (authorization announcement number: CN220373859U) discloses an extruder with a screening function. By setting up a screening mechanism, granular raw materials are placed inside the feed port. The vibration motor is started, and the vibration motor drives the connecting block at the output end to rotate, causing the connecting rod to move back and forth. This causes the screening plate to move back and forth as well, which in turn causes the granular raw materials on the surface of the screening plate to vibrate. Raw material particles of suitable size pass through the screening plate through vibration and fall into the inside of the barrel, making the granular raw materials entering the barrel more uniform in size. This results in more uniform quality of the extruded plastic product and solves the problem that the surface of the finished product is prone to voids or pinholes.

[0004] However, the above technical solution still has certain defects. When the electric pusher in the above device drives the pusher block to push the larger particles of raw material on the surface of the screening plate into the crushing box, it is necessary to stop feeding raw material particles. Moreover, these large particles can only be pushed into the crushing box for crushing after the current batch of raw material particles has been screened. Therefore, the entire operation process will have certain interruptions, which will affect the overall processing efficiency. For this reason, a screw extruder with screening function is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a screw extruder with screening function to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A screw extruder with screening function includes a base body. Several support columns are fixedly installed on the upper surface of the base body. The tops of the support columns are fixedly connected to the same barrel. A screw is horizontally arranged inside the barrel. A fixed box is fixedly connected to the top of the barrel. A through groove is opened at the bottom of the fixed box and the top of the barrel. A partition is longitudinally arranged in the middle of the inner cavity of the fixed box, dividing the fixed box into a screening chamber and a crushing chamber. The screening chamber is equipped with a screening component for screening particulate raw materials. The crushing chamber is equipped with a crushing component for crushing large particulate raw materials. A vibration component is provided at the bottom of the screening component to accelerate the screening rate.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In an optional screw extruder with screening function: the screening assembly includes a screening plate inclinedly disposed in the screening chamber, a first mounting plate fixedly installed at the upper end of the screening plate, and a second mounting plate fixedly installed at the lower end of the screening plate.

[0010] In an optional screw extruder with screening function: the fixed box is provided with a movable groove on one side of the screening chamber, the first mounting plate is movably disposed in the movable groove, and one side of the second mounting plate is inclined downward.

[0011] In an optional screw extruder with screening function: the vibration assembly includes a connecting block fixedly connected to one side of the first mounting plate, the other end of the connecting block extending through to the outside of the fixed box and fixedly connected to a collision plate, a rotating shaft connected to one side of the fixed box below the collision plate via a bearing, a cam fixedly sleeved on the outer wall of the rotating shaft, one end of the screw extending through to the outside of the barrel, and a second transmission wheel fixedly sleeved on the outer wall of one end of both the rotating shaft and the screw, and the two sets of second transmission wheels are connected by a second synchronous belt.

[0012] In an optional screw extruder with screening function: several telescopic rods are fixedly installed at the bottom of the movable groove, and the top end of each telescopic rod is fixedly connected to the bottom of the first mounting plate. Several springs are fixedly connected to the bottom of the first mounting plate and the second mounting plate. The springs at the bottom of the first mounting plate are all sleeved on the outer wall of the telescopic rods, and the other end of the springs at the bottom of the second mounting plate are all fixedly connected to the top of the partition plate.

[0013] In the optional solution of the screw extruder with screening function: the crushing component includes two sets of rotating shafts, and both sets of rotating shafts are arranged laterally in the crushing chamber of the fixed box. Crushing wheels are fixedly sleeved on the outer walls of both sets of rotating shafts. One end of each set of rotating shafts extends through to the outside of the fixed box and is fixedly connected to a gear, and the two sets of gears mesh with each other.

[0014] In an optional screw extruder with screening function: a mounting base is fixedly installed on one side of the upper surface of the base body, and a motor is fixedly installed on the top of the mounting base. A first conical tooth is fixedly installed at the output end of the motor. A second conical tooth that meshes with the first conical tooth is fixedly installed at one end of the screw. A first transmission wheel is fixedly sleeved on the outer wall of one end of a set of rotating shafts at the output end of the motor, and the two sets of first transmission wheels are connected by a first synchronous belt.

[0015] In an optional screw extruder with screening function: a feeding hopper is fixedly installed on the top of the fixed box and above the screening chamber.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model designs a screening component that uses an inclined screening plate to classify raw materials, allowing only qualified particles to enter the barrel, ensuring the uniformity of raw materials in extruded plastics, directly reducing voids and pinhole defects on the surface of the finished product, and improving product consistency. At the same time, large particles that do not pass the screening automatically slide along the screening plate into the crushing chamber, and after secondary crushing, they re-enter the processing flow, which avoids raw material waste and eliminates the need for manual intervention, achieving closed-loop processing.

[0018] 2. This utility model accelerates the separation of qualified particles by combining the inclined design of the screening plate with the vibration component. The downward inclined structure of the second mounting plate further guides large particles to accurately enter the crushing chamber, improving sorting efficiency and system smoothness. Through automated screening and crushing reprocessing, the cost of manual sorting is reduced, while reducing raw material loss, thus comprehensively improving production efficiency and economic benefits. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a side sectional perspective view of the barrel and fixing box of this utility model;

[0021] Figure 3 This is a side sectional plan view of the barrel and fixing box of this utility model;

[0022] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a schematic diagram of the screening plate structure of this utility model;

[0024] Figure 6 This is a side view of the overall structure of this utility model.

[0025] Figure label annotations: 100, base body; 200, screening component; 300, vibration component;

[0026] 110. Support column; 120. Barrel; 130. Screw; 140. Fixed box; 141. Baffle plate; 150. Rotating shaft; 160. Crushing wheel; 170. Gear; 180. Motor; 190. First conical tooth; 1910. Second conical tooth; 1920. First synchronous belt; 1930. Feed hopper;

[0027] 210. Screening plate; 220. First mounting plate; 230. Second mounting plate; 240. Movable slot;

[0028] 310. Connecting block; 320. Collision plate; 330. Rotating shaft; 340. Cam; 350. Telescopic rod; 360. Spring; 370. Second synchronous belt. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] In one embodiment, such as Figures 1-6As shown, a screw extruder with screening function includes a base body 100. Several support columns 110 are fixedly installed on the upper surface of the base body 100. The tops of the support columns 110 are fixedly connected to the same barrel 120. A screw 130 is horizontally arranged inside the barrel 120. A fixed box 140 is fixedly connected to the top of the barrel 120. A feeding hopper 1930 is fixedly installed on the top of the fixed box 140, above the screening chamber. A through groove is formed at the bottom of the fixed box 140 and the top of the barrel 120. A partition 141 is longitudinally arranged in the middle of the inner cavity of the fixed box 140, dividing the fixed box 140 into a screening chamber and a crushing chamber. The screening chamber is equipped with a screening component 200 for screening particulate raw materials, and the crushing chamber is equipped with a crushing component for crushing large particulate raw materials. The bottom end of the screening component 200 is equipped with a vibration component 300 for accelerating the screening rate. The screening component 200 includes a screening plate 210 inclinedly arranged in the screening chamber. A first mounting plate 220 is fixedly installed at the upper end of the screening plate 210, and a second mounting plate 230 is fixedly installed at the lower end of the screening plate 210. A movable groove 240 is opened on one side of the fixed box 140 located in the screening chamber. The first mounting plate 220 is movably arranged in the movable groove 240, and one side of the second mounting plate 230 is inclined downward.

[0031] In this embodiment, the operator pours granular raw materials into the fixed box 140 through the feeding hopper 1930. These granular raw materials then enter the screening chamber in the fixed box 140 and fall onto the surface of the screening plate 210. The screening plate 210 is inclined, and with the cooperation of the vibration component 300, the raw material particles of suitable size pass through the screening plate 210 and fall into the barrel 120. This makes the granular raw materials entering the barrel 120 more uniform in size, resulting in more uniform quality of the extruded plastic product. This solves the problem of voids or pinholes on the surface of the finished product. At the same time, some large granular raw materials cannot pass through the screening plate 210. In this case, the inclined screening plate 210 will extend and roll into the crushing chamber in the fixed box 140 to crush these larger granular raw materials into granular raw materials of suitable size before entering the barrel 120. The second mounting plate 230 is inclined downward on one side to guide these large granular raw materials and successfully roll them into the crushing chamber in the fixed box 140.

[0032] In one embodiment, such as Figure 3-6As shown, the vibration assembly 300 includes a connecting block 310 fixedly connected to one side of the first mounting plate 220. The other end of the connecting block 310 extends through to the outside of the fixed box 140 and is fixedly connected to a collision plate 320. A rotating shaft 330 is connected to one side of the fixed box 140 below the collision plate 320 via a bearing. A cam 340 is fixedly sleeved on the outer wall of the rotating shaft 330. One end of the screw 130 extends through to the outside of the barrel 120. A second transmission wheel is fixedly sleeved on the outer wall of one end of both the rotating shaft 330 and the screw 130. The two sets of second transmission wheels are connected by a second synchronous belt 370. Several telescopic rods 350 are fixedly installed at the bottom of the movable groove 240, and the top end of each telescopic rod 350 is fixedly connected to the bottom of the first mounting plate 220. Several springs 360 are fixedly connected to the bottom of both the first mounting plate 220 and the second mounting plate 230. The springs 360 at the bottom of the first mounting plate 220 are all sleeved on the... The outer wall of the telescopic rod 350 and the other end of the spring 360 at the bottom of the second mounting plate 230 are fixedly connected to the top of the partition plate 141. With the operation of the drive device, the rotating shaft 330 is driven to rotate through the second synchronous belt 370, causing the cam 340 to rotate together. When the convex part of the cam 340 rotates to the top, it will push the collision plate 320 upward, thereby driving the connecting block 310 and the first mounting plate 220 fixed thereto to move upward synchronously, and then driving the screening plate 210 to move together. When the convex part of the cam 340 rotates and disengages from the collision plate 320, the first mounting plate 220 and the screening plate 210 will shake up and down more under the action of the lower spring 360, and under the guidance of the telescopic rod 350, the screening plate 210 can only shake up and down vertically, causing the granular raw material on the surface of the screening plate 210 to vibrate, accelerating the rate at which the raw material particles pass through the screening plate 210, and greatly improving the screening rate of the device.

[0033] In one embodiment, such as Figure 2 and Figure 3 As shown, the crushing assembly includes two sets of rotating shafts 150, both of which are horizontally arranged within the crushing chamber of the fixed box 140. Crushing wheels 160 are fixedly sleeved on the outer walls of both sets of rotating shafts 150. One end of each set of rotating shafts 150 extends through to the outside of the fixed box 140 and is fixedly connected to a gear 170, which meshes with each other. With the operation of the drive device, the rotating shaft 330 is driven to rotate, and the two sets of meshing gears 170 make the two sets of rotating shafts 330 rotate synchronously, thereby driving the two sets of crushing wheels 160 to rotate. Larger particles that roll down the screening plate 210 into the crushing chamber fall onto the surface of the crushing wheels 160. The crushing wheels 160 crush the larger particles into particles of suitable size, which then fall into the interior of the barrel 120 through the through groove at the bottom of the fixed box 140. In this way, the uniformity of the particle size is improved, thereby improving the quality of the finished plastic product.

[0034] In one embodiment, such as Figure 1 As shown, a mounting base is fixedly installed on one side of the upper surface of the base body 100, and a motor 180 is fixedly installed on the top of the mounting base. A first conical tooth 190 is fixedly installed at the output end of the motor 180, and a second conical tooth 1910 that meshes with the first conical tooth 190 is fixedly installed at one end of the screw 130. A first transmission wheel is fixedly sleeved on the outer wall of one end of a set of rotating shafts 150 at the output end of the motor 180, and the two sets of first transmission wheels are connected by a first synchronous belt 1920. When the motor 180 is started, the output end of the motor 180 drives the first conical tooth 190 to rotate, thereby driving the second conical tooth 1910 that meshes with it to rotate, and then driving the screw 130 to rotate. At the same time, the first synchronous belt 1920 and the second synchronous belt 370 drive the crushing component and the vibration component 300 to operate synchronously, which greatly improves the overall linkage of the device and further improves the production efficiency of the device.

[0035] The above embodiments disclose a screw extruder with a screening function. In this extruder, the operator pours granular raw material into the fixed box 140 through the feeding hopper 1930. The granular material then enters the screening chamber within the fixed box 140 and falls onto the surface of the screening plate 210. The screening plate 210 is tilted, and with the cooperation of the vibration assembly 300, appropriately sized raw material particles pass through the screening plate 210 and fall into the barrel 120. This results in more uniform particle size entering the barrel 120, leading to more uniform quality of the extruded plastic product and solving the problem of voids or pinholes on the surface of the finished product. Simultaneously, some large granular materials cannot pass through the screening plate 210, at which point the tilted plate extends further. The screening plate 210 rolls into the crushing chamber in the fixed box 140 to crush the larger raw materials into appropriately sized granules before they enter the barrel 120. The second mounting plate 230 is tilted downwards on one side to guide the larger raw materials into the crushing chamber in the fixed box 140. The larger raw materials that roll down the screening plate 210 into the crushing chamber fall onto the surface of the crushing wheel 160, where they are crushed into appropriately sized granules. These granules then fall into the barrel 120 through the groove at the bottom of the fixed box 140. This method improves the uniformity of the granule size, thereby improving the quality of the finished plastic product.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A screw extruder with screening function, comprising a base body (100), characterized in that, A plurality of support columns (110) are fixedly installed on the upper surface of the base body (100). The top of the plurality of support columns (110) is fixedly connected to the same barrel (120). A screw (130) is arranged horizontally inside the barrel (120). A fixed box (140) is fixedly connected to the top of the barrel (120). A through groove is opened at the bottom of the fixed box (140) and the top of the barrel (120). A partition (141) is arranged longitudinally in the middle of the inner cavity of the fixed box (140). The partition (141) divides the fixed box (140) into a screening chamber and a crushing chamber. A screening component (200) for screening particulate raw materials is provided in the screening chamber. A crushing component for crushing large particulate raw materials is provided in the crushing chamber. A vibration component (300) for accelerating the screening rate is provided at the bottom of the screening component (200). The screening assembly (200) includes a screening plate (210) that is inclinedly disposed in the screening chamber. A first mounting plate (220) is fixedly installed on the upper end of the screening plate (210), and a second mounting plate (230) is fixedly installed on the lower end of the screening plate (210). The fixed box (140) is provided with a movable groove (240) on one side of the screening chamber. The first mounting plate (220) is movably disposed in the movable groove (240), and one side of the second mounting plate (230) is inclined downward. The vibration assembly (300) includes a connecting block (310) fixedly connected to one side of the first mounting plate (220). The other end of the connecting block (310) extends through to the outside of the fixed box (140) and is fixedly connected to a collision plate (320). A rotating shaft (330) is connected to one side of the fixed box (140) below the collision plate (320) via a bearing. A cam (340) is fixedly sleeved on the outer wall of the rotating shaft (330). One end of the screw (130) extends through to the outside of the barrel (120). A second transmission wheel is fixedly sleeved on the outer wall of one end of both the rotating shaft (330) and the screw (130), and the two sets of second transmission wheels are connected by a second synchronous belt (370).

2. The screw extruder with screening function according to claim 1, characterized in that, The bottom of the movable groove (240) is fixedly installed with a number of equidistant telescopic rods (350), and the top of each telescopic rod (350) is fixedly connected to the bottom of the first mounting plate (220). The bottom of the first mounting plate (220) and the second mounting plate (230) are fixedly connected with a number of springs (360). The springs (360) at the bottom of the first mounting plate (220) are all sleeved on the outer wall of the telescopic rod (350), and the other end of the springs (360) at the bottom of the second mounting plate (230) is fixedly connected to the top of the partition plate (141).

3. The screw extruder with screening function according to claim 1, characterized in that, The crushing assembly includes two sets of rotating shafts (150), and both sets of rotating shafts (150) are arranged laterally in the crushing chamber inside the fixed box (140). Crushing wheels (160) are fixedly sleeved on the outer walls of both sets of rotating shafts (150). One end of each set of rotating shafts (150) extends through to the outside of the fixed box (140) and is fixedly connected to a gear (170), and the two sets of gears (170) mesh with each other.

4. The screw extruder with screening function according to claim 3, characterized in that, A mounting base is fixedly installed on one side of the upper surface of the base body (100), and a motor (180) is fixedly installed on the top of the mounting base. A first conical tooth (190) is fixedly installed at the output end of the motor (180), and a second conical tooth (1910) that meshes with the first conical tooth (190) is fixedly installed at one end of the screw (130). A first transmission wheel is fixedly sleeved on the outer wall of one end of a set of rotating shafts (150) at the output end of the motor (180), and the two sets of first transmission wheels are connected by a first synchronous belt (1920).

5. The screw extruder with screening function according to claim 1, characterized in that, A feeding hopper (1930) is fixedly installed on the top of the fixed box (140) and above the screening chamber.

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