A twin-screw extruder for producing TPU plastic particles

Abstract

The present invention discloses a twin-screw extruder for producing TPU plastic particles, which relates to the technical field of plastic production. The device comprises a machine body, wherein the machine body comprises a workbench, a barrel is mounted on the top of the workbench, a cutting mechanism, a limiting mechanism and a scraping mechanism are arranged at one end of the outer surface of the barrel, and a material receiving mechanism is arranged at the bottom end of the machine body, thereby realizing faster mold replacement. First, a support frame is driven to move by a first electric telescopic rod so that a knife holder on the support frame is away from the mold. Then, a ball is driven to move by pulling a pull rod so that the ball drives a first spring to be compressed. When the ball is away from a fixed groove, the mold can be removed for replacement. Conversely, the mold can be limited by inserting the ball into the fixed groove, thereby providing convenience for mold replacement and avoiding the problem of being unable to quickly replace the mold in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of plastic production, in particular to a twin-screw extruder for producing TPU plastic particles. Background Art

[0002] TPU plastic particles are particles made of thermoplastic polyurethane materials, usually in granular or granular block form. TPU is an excellent elastomeric material with good wear resistance, oil resistance, heat resistance and flexibility. Through the thermoplasticity of TPU plastic particles, various plastic products can be produced using extrusion, injection molding and other processing methods.

[0003] In the production process of plastic particles, the twin-screw extruder is a key equipment. It realizes the extrusion process of the material through the rotation of the twin screws. When the screws rotate, the material will be subjected to multiple forces such as compression, shearing and friction, causing the temperature to gradually increase. To ensure that the material can reach the ideal processing temperature, the extruder barrel is usually equipped with a heating device. The heating device is used to make the material reach the required molten state, making it easier to flow and process. At the same time, it will also efficiently mix, disperse and plasticize between the screws, and the staggered design of the twin screws enhances the shear force between the materials, ensuring that materials of different components are fully mixed. The fully mixed, heated and plasticized materials are finally extruded through the mold to form the desired product shape.

[0004] However, the existing twin-screw extruder equipment has the following shortcomings:

[0005] 1) In conventional twin-screw extruders, when extruding material from the die, the material is directly cut into granules by a cutter. However, the cutter is closely spaced from the die, and the cutter holder is fixed to the die. During die replacement, the cutter holder must be disassembled first, then the die, and the cutter holder must be installed on the die to be replaced. The die must then be fixed to the barrel with bolts. This cumbersome operation makes it difficult to quickly replace the die, making the extruder inconvenient to use.

[0006] 2) During the cutting process, since the material still has a high viscosity after being shaped by the mold, it is easy for the material to stick to the cutter when cutting. At this time, the staff needs to clean the cutter regularly, which increases the workload of the staff;

[0007] 3) Because the materials processed by the twin-screw extruder in the prior art fall directly into the cooling box, this easily causes the materials to accumulate at one end of the cooling box, affecting the cooling effect of the materials. At this time, the staff needs to manually flatten the materials, which reduces the working efficiency of the extruder.

[0008] Therefore, we proposed a twin-screw extruder equipment for the production of TPU plastic particles in order to solve the problems raised above. Summary of the Invention

[0009] The object of the present invention is to provide a twin-screw extruder for the production of TPU plastic particles, which can realize faster mold replacement. First, the support frame is driven to move by a first electric telescopic rod, so that the tool holder on the support frame is away from the mold. Then, the ball is driven to move by pulling the pull rod, so that the ball drives the first spring to compress. When the ball is away from the fixed groove, the mold can be removed and replaced. Conversely, the mold can be limited by inserting the ball into the fixed groove, so as to solve the problems raised by the above-mentioned background technology.

[0010] To achieve the above object, the present invention provides the following technical solution: a twin-screw extruder for producing TPU plastic particles, comprising a body, the body including a workbench, a barrel mounted on the top of the workbench, a cutting mechanism, a limiting mechanism, and a scraping mechanism provided on one end of the outer surface of the barrel, and a material receiving mechanism provided on the bottom end of the body;

[0011] The top of the workbench is fixedly mounted with a support base, the barrel is fixedly mounted on the top of the support base, and a feed hopper is fixedly mounted on the top of the barrel, a driving motor is mounted on the top of the workbench, and an output end of the driving motor is mounted on a connecting block, the outer surface of the connecting block is rotatably connected to a belt, and the inner side of the belt is rotatably connected to another set of connecting blocks, one end of the outer surface of the connecting block is fixedly mounted with an extrusion screw, and a heater is mounted on the bottom end of the barrel, the cutting mechanism includes a fixed frame, the fixed frame is fixedly mounted on both sides of the outer surface of the barrel, a first electric telescopic rod is mounted on the top of the barrel, the output end of the first electric telescopic rod is mounted on a support frame, the inner side of the support frame is slidably connected to the outer surface of the fixed frame, and a knife holder and a guide plate are fixedly mounted on the inner side of the support frame, a second electric telescopic rod is mounted on one side of the outer surface of the knife holder, and a cutter is mounted on the output end of the second electric telescopic rod.

[0012] Preferably, slide grooves are provided on both sides of the outer surface of the barrel, and T-shaped blocks are fixedly installed on both sides of the inner surface of the support frame, and the T-shaped blocks are slidably connected to the inner sides of the slide grooves.

[0013] Preferably, the limiting mechanism includes a mold, which is installed at the bottom end of the barrel, and the four corners of the top of the mold are fixedly installed with insertion rods. A slot is opened at the bottom end of the barrel, and the insertion rod is slidably connected to the inner side of the slot, and the top of the insertion rod is designed as a bevel.

[0014] Preferably, a fixing groove is provided on one side of the outer surface of the insertion rod, and placement grooves are provided on both sides of the outer surface of the barrel. Balls are slidably connected to the inner sides of the placement grooves and the fixing grooves. A first spring and a pull rod are fixedly installed on one end of the outer surface of the ball. A limit block is fixedly installed on one end of the outer surface of the first spring, and the limit block is slidably connected to the inner side of the placement groove.

[0015] Preferably, the scraping mechanism includes fixed blocks, two groups of the fixed blocks are fixedly installed on the top of the support frame, and the inner side of the fixed blocks is slidably connected with a soft brush and a pad block, and one side of the outer surface of one group of the pad block and the fixed block is provided with a storage groove.

[0016] Preferably, a pressing plate is slidably connected to the inner side of the receiving groove, and mounting holes are provided on the top ends of the pressing plate, the cushion block and the fixed block. A threaded rod is rotatably connected to the inner side of the mounting hole, and a turning handle is fixedly installed on the top end of the threaded rod.

[0017] Preferably, the material receiving mechanism includes a material receiving box, which is arranged at the bottom end of the workbench, a liquid injection box is installed on the inner side of the material receiving box, the inner side of the liquid injection box is filled with coolant, a discharge port is provided on one side of the outer surface of the material receiving box, and square grooves are provided on both sides of the outer surface of the material receiving box, and a support rod is fixedly installed on the inner side of the square groove.

[0018] Preferably, the surface of the support rod is slidably connected to a sliding block, and blocks are fixedly installed on both sides of the outer surface of the sliding block, and a movable plate is fixedly installed on one side of the outer surface of the block, and a second spring is fixedly installed on the bottom end of the sliding block and the inner end of the square groove, and a condenser is installed at the bottom end of the movable plate, and a groove and a diversion groove are provided at the top of the movable plate, and the diversion grooves are symmetrically distributed on both sides of the outer surface of the movable plate.

[0019] Preferably, a third electric telescopic rod is installed on one side of the outer surface of the material receiving box, and a push plate is installed on the output end of the third electric telescopic rod. Both sides of the outer surface of the push plate are slidably connected with slide rails, and the slide rails are fixedly installed on both sides of the inner surface of the material receiving box.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention realizes faster mold replacement through the arrangement of a fixed frame, a first electric telescopic rod, a support frame, a knife holder, a second electric telescopic rod, a cutter, a guide plate, a slide groove, a T-block, a limit mechanism, a mold, a plug rod, a slot, a fixed groove, a placement groove, a ball, a first spring, a pull rod and a limit block. First, the first electric telescopic rod drives the support frame to move on the surface of the fixed frame so that the knife holder on the support frame is away from the mold, and the slide groove and the T-block are used to limit the moving path of the support frame. Then, the pull rod is pulled to drive the ball to move, so that the ball drives the first spring The first spring is then pressed against the inner side of the fixed groove to compress the ball, and the ball is compressed by the first spring. After the rod is fully inserted into the slot, the ball can be inserted into the inner side of the fixed groove by the reset of the first spring, thereby completing the limitation of the mold and avoiding the problem of not being able to quickly replace the mold in the existing technology.

[0022] 2. The present invention realizes more convenient maintenance work through the arrangement of the fixed block, soft brush, pad, storage groove, pressing piece, mounting hole, threaded rod and turning handle. First, the threaded rod is driven by the turning handle to rotate away from the mounting hole on the pressing piece, and then the pressing piece is moved to the storage groove and pulled out of the storage groove. Due to the flexibility of the soft brush, it can be directly removed from the inner side of the fixed block, and then a new soft brush is bent in the same way and placed inside the fixed block, and then the pressing piece is put back to its original position from the storage groove, and the threaded rod is driven by the turning handle to limit the pressing piece, and then the threaded rod is driven by the pressing piece to press down the soft brush to prevent the soft brush from bending and complete the limiting of the soft brush. At the same time, the cutter will pass by the soft brush during its movement. When there is material adhering to the cutter, the material can be scraped off by the soft brush and the purpose of cleaning the cutter is achieved, which improves the situation in the prior art where material is easily adhered to the cutter.

[0023] 3. The present invention realizes a more efficient cooling effect through the arrangement of a material receiving box, a liquid injection box, a discharge port, a square groove, a support rod, a sliding block, a stopper, a movable plate, a second spring, a condenser, a groove, a diversion groove, a third electric telescopic rod, a push plate and a slide rail. The movable plate is first driven to move by the gravity caused by the falling material, and then the stopper is driven to move by the movable plate, so that the stopper drives the sliding block to move on the support rod, and then the sliding block drives the second spring to expand and contract, and the movable plate is buffered by the reset of the second spring, and then the material is driven to move by the up and down movement of the movable plate, so that the material is moved in During the up and down movement, the materials will be scattered all over the movable plate. At the same time, the materials on the movable plate will be cooled by the condenser. Then the materials in the groove can fall into various places of the receiving box through the diverter trough, and the materials will be further cooled by the coolant in the liquid injection box, so that the materials can be cooled quickly. When the materials accumulate to a certain extent, the partition at the discharge port can be removed, and then the push plate is driven by the third electric telescopic rod to discharge the materials from the discharge port, and the moving path of the push plate is limited by the slide rail, which provides convenience for material discharge and solves the problem that materials are easily accumulated in the prior art and need to be manually flattened by staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a perspective view of the main structure of a twin-screw extruder for producing TPU plastic particles according to the present invention;

[0025] Figure 2 This is a side structural perspective diagram of a twin-screw extruder for producing TPU plastic particles according to the present invention;

[0026] Figure 3 This is a three-dimensional diagram of the split structure of a twin-screw extruder for producing TPU plastic particles of the present invention;

[0027] Figure 4 This is an enlarged perspective view of a cutting mechanism in a twin-screw extruder for producing TPU plastic particles according to the present invention;

[0028] Figure 5 This is an enlarged perspective view of the exploded structure of the cutting mechanism in a twin-screw extruder for producing TPU plastic particles according to the present invention;

[0029] Figure 6 This is an enlarged perspective view of the exploded structure of a limiting mechanism in a twin-screw extruder for producing TPU plastic particles according to the present invention;

[0030] Figure 7 This invention is a twin-screw extruder for producing TPU plastic particles Figure 6 A magnified stereoscopic view of the structure at center A;

[0031] Figure 8This is an enlarged perspective view of the exploded structure of a scraping mechanism in a twin-screw extruder for producing TPU plastic particles according to the present invention;

[0032] Figure 9 This is an enlarged perspective view of the cross-sectional structure of a material receiving mechanism in a twin-screw extruder for producing TPU plastic particles according to the present invention;

[0033] Figure 10 This invention is a twin-screw extruder for producing TPU plastic particles Figure 9 Enlarged stereoscopic image of the structure at point B in the middle.

[0034] In the figure: 1. Machine body; 101. Workbench; 102. Barrel; 103. Support seat; 104. Feed hopper; 105. Drive motor; 106. Connecting block; 107. Belt; 108. Extrusion screw; 109. Heater; 2. Cutting mechanism; 201. Fixing frame; 202. First electric telescopic rod; 203. Supporting frame; 204. Knife holder; 205. Second electric telescopic rod; 206. Cutter; 207. Guide plate; 208. Slide; 209. T-block; 3. Limiting mechanism; 301. Mold; 302. Inserting rod; 303. Slot; 304. Fixing slot; 305. Placement slot; 306. Ball; 307. 7. First spring; 308. Pull rod; 309. Limit block; 4. Scraping mechanism; 401. Fixed block; 402. Soft brush; 403. Cushion block; 404. Storage slot; 405. Pressing plate; 406. Mounting hole; 407. Threaded rod; 408. Turning handle; 5. Material receiving mechanism; 501. Material receiving box; 502. Liquid filling box; 503. Discharge port; 504. Square slot; 505. Support rod; 506. Sliding block; 507. Stop block; 508. Movable plate; 509. Second spring; 510. Condenser; 511. Groove; 512. Diverter slot; 513. Third electric telescopic rod; 514. Push plate; 515. Slide rail. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] Please see the attached Figure 1 -Attached Figure 10As shown, the present invention provides a technical solution: a twin-screw extruder for producing TPU plastic particles, comprising a body, the body comprising a workbench, a barrel mounted on the top of the workbench, a cutting mechanism, a limiting mechanism and a scraping mechanism provided at one end of the outer surface of the barrel, and a material receiving mechanism provided at the bottom end of the body.

[0037] Example 1, according to Figure 1-Figure 7 As shown, a support base 103 is fixedly installed on the top of the workbench 101, a barrel 102 is fixedly installed on the top of the support base 103, and a feed hopper 104 is fixedly installed on the top of the barrel 102. A driving motor 105 is installed on the top of the workbench 101, and a connecting block 106 is installed on the output end of the driving motor 105. The outer surface of the connecting block 106 is rotatably connected to a belt 107, and the inner side of the belt 107 is rotatably connected to another set of connecting blocks 106. One end of the outer surface of the connecting block 106 is fixedly installed with an extrusion screw 10 8. A heater 109 is installed at the bottom end of the barrel 102. The cutting mechanism 2 includes a fixed frame 201, which is fixedly installed on both sides of the outer surface of the barrel 102. A first electric telescopic rod 202 is installed at the top of the barrel 102. A support frame 203 is installed at the output end of the first electric telescopic rod 202. The inner side of the support frame 203 is slidably connected to the outer surface of the fixed frame 201, and a knife holder 204 and a guide plate 207 are fixedly installed on the inner side of the support frame 203. A second electric The telescopic rod 205 is provided with a cutter 206 at the output end of the second electric telescopic rod 205. Slide grooves 208 are provided on both sides of the outer surface of the barrel 102. T-blocks 209 are fixedly installed on both sides of the inner surface of the support frame 203. The T-blocks 209 are slidably connected to the inner side of the slide grooves 208. The limiting mechanism 3 includes a mold 301. The mold 301 is installed at the bottom end of the barrel 102, and the top four corners of the mold 301 are fixedly installed with plug rods 302. The bottom end of the barrel 102 is provided with a slot 303. The plug rod 302 is slidably connected to the inner side of the slide groove 208. It is connected to the inner side of the slot 303, and the top end of the insertion rod 302 is designed as a beveled surface. A fixing groove 304 is provided on one side of the outer surface of the insertion rod 302, and placement grooves 305 are provided on both sides of the outer surface of the barrel 102. The inner sides of the placement grooves 305 and the fixing grooves 304 are slidably connected with balls 306. A first spring 307 and a pull rod 308 are fixedly installed on one end of the outer surface of the ball 306. A limit block 309 is fixedly installed on one end of the outer surface of the first spring 307, and the limit block 309 is slidably connected to the inner side of the placement groove 305.

[0038] The effect achieved by the entire embodiment 1 is: a faster mold 301 replacement operation is achieved. First, the cutter 206 is driven by the second electric telescopic rod 205 to cut the material, and the moving path of the material is limited by the guide plate 207 to prevent it from falling to the ground. Then, the support frame 203 is driven by the first electric telescopic rod 202 to move on the surface of the fixed frame 201, so that the knife holder 204 on the support frame 203 is away from the mold 301, and the moving path of the support frame 203 is limited by the slide groove 208 and the T-block 209. Then, the ball 306 is driven to move by pulling the pull rod 308, so that the ball 306 drives the first spring 307 to be compressed. When the ball 306 is away from the mold 301, the ball 306 is driven to move. When the fixed slot 304 is opened, the mold 301 can be removed and replaced. After the pull rod 308 is released, the reset of the first spring 307 will drive the ball 306 to move back to its original position. Then the insertion rod 302 on the replaced mold 301 is aligned with the slot 303 and inserted. During the insertion of the insertion rod 302, the bevel surface will squeeze the ball 306, so that the insertion rod 302 drives the ball 306 to move, and the ball 306 drives the first spring 307 to be compressed. After the insertion rod 302 is fully inserted into the slot 303, the reset of the first spring 307 will drive the ball 306 to be inserted into the inner side of the fixed slot 304, thereby completing the limitation of the mold 301 and providing convenience for the replacement of the mold 301.

[0039] Example 2, according to Figure 5 and Figure 8 As shown, the scraping mechanism 4 includes a fixed block 401, two groups of fixed blocks 401 are fixedly installed on the top of the support frame 203, and the inner side of the fixed block 401 is slidably connected with a soft brush 402 and a pad 403, and one side of the outer surface of one group of pads 403 and the fixed block 401 is provided with a receiving groove 404, and the inner side of the receiving groove 404 is slidably connected with a pressing plate 405, and the top of the pressing plate 405, the pad 403 and the fixed block 401 are all provided with a mounting hole 406, and the inner side of the mounting hole 406 is rotatably connected with a threaded rod 407, and the top of the threaded rod 407 is fixedly installed with a turning handle 408.

[0040] The effect achieved by the entire embodiment 2 is: it realizes more convenient maintenance work. First, the threaded rod 407 is driven to rotate away from the mounting hole 406 on the pressing plate 405 by turning the handle 408, and then the pressing plate 405 is moved to the storage groove 404 and the pressing plate 405 is pulled out from the storage groove 404. Due to the flexibility of the soft brush 402, it can be directly removed from the inner side of the fixed block 401. Then, a new soft brush 402 is bent in the same way and placed inside the fixed block 401, and then the pressing plate 405 is put back into its original position from the storage groove 404. The threaded rod 407 is driven by the turning handle 408 to limit the pressing piece 405, and then the threaded rod 407 drives the pressing piece 405 to press down the soft brush 402 to prevent the soft brush 402 from bending and complete the limiting of the soft brush 402, which provides convenience for the replacement of the soft brush 402. At the same time, the cutter 206 will pass through the soft brush 402 during its movement. When there is material adhering to the cutter 206, the soft brush 402 can scrape the material off and achieve the purpose of cleaning the cutter 206, reducing the workload of the staff.

[0041] Example 3, according to Figure 3 、 Figure 9 and Figure 10 As shown, the material receiving mechanism 5 includes a material receiving box 501, which is arranged at the bottom end of the workbench 101. A liquid injection box 502 is installed on the inner side of the material receiving box 501, and the inner side of the liquid injection box 502 is filled with coolant. A discharge port 503 is provided on one side of the outer surface of the material receiving box 501, and square grooves 504 are provided on both sides of the outer surface of the material receiving box 501. A support rod 505 is fixedly installed on the inner side of the square groove 504. A sliding block 506 is slidably connected to the surface of the support rod 505. Stoppers 507 are fixedly installed on both sides of the outer surface of the sliding block 506. A movable plate is fixedly installed on one side of the outer surface of the stopper 507. 508, a second spring 509 is fixedly installed on the bottom end of the sliding block 506 and the inner end of the square groove 504, a condenser 510 is installed on the bottom end of the movable plate 508, a groove 511 and a diverter groove 512 are provided on the top of the movable plate 508, the diverter grooves 512 are symmetrically distributed on both sides of the outer surface of the movable plate 508, a third electric telescopic rod 513 is installed on one side of the outer surface of the material receiving box 501, and a push plate 514 is installed on the output end of the third electric telescopic rod 513, and both sides of the outer surface of the push plate 514 are slidably connected with slide rails 515, and the slide rails 515 are fixedly installed on both sides of the inner surface of the material receiving box 501.

[0042] The effect achieved by the entire embodiment 3 is: a more efficient cooling effect is achieved, first the movable plate 508 is driven to move by the gravity caused by the falling material, and then the movable plate 508 drives the stopper 507 to move, so that the stopper 507 drives the sliding block 506 to move on the support rod 505, and then the sliding block 506 drives the second spring 509 to expand and contract, and the movable plate 508 is buffered by the reset of the second spring 509, and then the material is driven to move by the up and down movement of the movable plate 508, so that the material will be scattered all over the movable plate 508 during the up and down movement. The supercondenser 510 cools the material on the movable plate 508, and then the material in the groove 511 can fall into various places of the material receiving box 501 through the diverter trough 512, and the material is further cooled by the coolant in the liquid injection box 502, so that the material can be cooled quickly. When the material accumulates to a certain extent, the partition at the discharge port 503 can be removed, and then the third electric telescopic rod 513 drives the push plate 514 to discharge the material from the discharge port 503, and the sliding rail 515 is used to limit the moving path of the push plate 514, which provides convenience for material discharge and improves the working efficiency of the extrusion equipment.

[0043] The working principle of the whole equipment is as follows: when using the extrusion equipment, the material is first put into the barrel 102 through the feed hopper 104, and then the connecting block 106 is driven to rotate by the driving motor 105, so that the connecting block 106 drives the belt 107 to rotate, and the belt 107 drives another set of connecting blocks 106 to rotate, and then the connecting block 106 drives the extrusion screw 108 to rotate, so that the material is subjected to multiple forces such as compression, shearing and friction, and the heater 109 heats the barrel 102 and the material therein to reach the required molten state, and the exhaust gas generated during the processing of the material will be discharged through the exhaust port on the top of the barrel 102, and then the processed material will pass through the mold 301 for preliminary After cooling and shaping, it is extruded, and then the cutter 206 is driven by the second electric telescopic rod 205 to cut the material. During the movement of the cutter 206, it passes through the soft brush 402. When there is material adhering to the cutter 206, the soft brush 402 can scrape the material off and achieve the purpose of cleaning the cutter 206. Then the cut material and the scraped material will pass through the inner side of the guide plate 207 and fall on the groove 511 of the movable plate 508, so that the guide plate 207 limits the moving path of the material to prevent it from falling to the ground. Since the movable plate 508 is always subjected to the gravity brought by the falling material, the movable plate 508 drives the stopper 507 to move, and then the stopper 507 drives the sliding block 506 to move on the support rod 505. The movable plate 508 is cushioned by the reset of the second spring 509, and then the material is moved by the up and down movement of the movable plate 508, so that the material is scattered all over the movable plate 508 during the up and down movement. At the same time, the material on the movable plate 508 is cooled for the second time by the condenser 510, and then the material in the groove 511 can fall to various places of the material receiving box 501 through the diverter trough 512, and the material is further cooled by the coolant in the liquid injection box 502, so that the material can be cooled quickly. When the material accumulates to a certain extent, the partition at the discharge port 503 can be removed, and then the material is driven by the third electric telescopic rod 513 to The push plate 514 discharges the material from the discharge port 503, and limits the moving path of the push plate 514 through the slide rail 515, which provides convenience for material discharge. When the mold 301 needs to be replaced to produce materials of different shapes, the support frame 203 can be driven by the first electric telescopic rod 202 to move on the surface of the fixed frame 201, so that the tool holder 204 on the support frame 203 is away from the mold 301, and the moving path of the support frame 203 is limited by the slide groove 208 and the T-block 209, and then the ball 306 is driven to move by pulling the pull rod 308, so that the ball 306 drives the first spring 307 to be compressed. When the ball 306 is away from the fixed groove 304, the mold 301 can be removed for replacement.After the rod 302 is fully inserted into the slot 303, the first spring 307 can be used to reset the ball 306 and insert it into the inner side of the fixed groove 304, thereby completing the limit of the mold 301, so that the staff can quickly replace the mold 301, and then the support frame 203 can be driven to move back to its original position by the first electric telescopic rod 202, and the tool holder 203 can be moved by the movement of the support frame 203. The cutter 206 on 04 is adjusted to a suitable distance from the mold 301. When the soft brush 402 needs to be replaced, the threaded rod 407 can be driven by the turning handle 408 to rotate away from the mounting hole 406 on the pressing plate 405, and then the pressing plate 405 is moved to the storage groove 404 and the pressing plate 405 is pulled out from the storage groove 404. Due to the flexibility of the soft brush 402, it can be directly removed from the inner side of the fixed block 401. Then, the new soft brush 402 is bent in the same way and placed inside the fixed block 401. Then, the pressing plate 405 is put back into its original position from the storage groove 404, and the threaded rod 407 is driven by the turning handle 408 to limit the pressing plate 405. Then, the threaded rod 407 drives the pressing plate 405 to press down the soft brush 402 to prevent the soft brush 402 from bending and complete the limiting of the soft brush 402, which provides convenience for the replacement of the soft brush 402.

[0044] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A twin-screw extruder for producing TPU plastic particles, comprising a body (1), characterized in that: The machine body (1) comprises a workbench (101), a barrel (102) is mounted on the top of the workbench (101), a cutting mechanism (2), a limiting mechanism (3) and a scraping mechanism (4) are provided on one end of the outer surface of the barrel (102), and a material receiving mechanism (5) is provided at the bottom end of the machine body (1); A support base (103) is fixedly mounted on the top of the workbench (101), the barrel (102) is fixedly mounted on the top of the support base (103), and a feed hopper (104) is fixedly mounted on the top of the barrel (102), a driving motor (105) is mounted on the top of the workbench (101), a connecting block (106) is mounted on the output end of the driving motor (105), the outer surface of the connecting block (106) is rotatably connected to a belt (107), the inner side of the belt (107) is rotatably connected to another set of connecting blocks (106), an extrusion screw (108) is fixedly mounted on one end of the outer surface of the connecting block (106), and a heater ( 109), the cutting mechanism (2) comprises a fixed frame (201), the fixed frame (201) is fixedly mounted on both sides of the outer surface of the barrel (102), a first electric telescopic rod (202) is mounted on the top of the barrel (102), a support frame (203) is mounted on the output end of the first electric telescopic rod (202), the inner side of the support frame (203) is slidably connected to the outer surface of the fixed frame (201), and a knife holder (204) and a guide plate (207) are fixedly mounted on the inner side of the support frame (203), a second electric telescopic rod (205) is mounted on one side of the outer surface of the knife holder (204), and a cutter (206) is mounted on the output end of the second electric telescopic rod (205); Slide grooves (208) are provided on both sides of the outer surface of the barrel (102), and T-shaped blocks (209) are fixedly installed on both sides of the inner surface of the support frame (203), and the T-shaped blocks (209) are slidably connected to the inner sides of the slide grooves (208); The limiting mechanism (3) includes a mold (301), the mold (301) is installed at the bottom end of the barrel (102), and the four corners of the top end of the mold (301) are fixedly installed with an insertion rod (302), the bottom end of the barrel (102) is provided with a slot (303), the insertion rod (302) is slidably connected to the inner side of the slot (303), and the top end of the insertion rod (302) is designed to be a beveled surface; The scraping mechanism (4) comprises a fixed block (401), two groups of the fixed blocks (401) are fixedly mounted on the top of the support frame (203), and the inner sides of the fixed blocks (401) are slidably connected with a soft brush (402) and a pad (403), and one side of the outer surface of one group of the pad (403) and the fixed block (401) is provided with a receiving groove (404).

2. The twin-screw extruder for producing TPU plastic particles according to claim 1, characterized in that: A fixing groove (304) is provided on one side of the outer surface of the insertion rod (302), and placement grooves (305) are provided on both sides of the outer surface of the barrel (102). Balls (306) are slidably connected to the inner sides of the placement grooves (305) and the fixing grooves (304). A first spring (307) and a pull rod (308) are fixedly installed on one end of the outer surface of the ball (306). A limiting block (309) is fixedly installed on one end of the outer surface of the first spring (307), and the limiting block (309) is slidably connected to the inner side of the placement groove (305).

3. The twin-screw extruder for producing TPU plastic particles according to claim 1, characterized in that: A pressing plate (405) is slidably connected to the inner side of the receiving groove (404), and mounting holes (406) are provided at the top ends of the pressing plate (405), the cushion block (403) and the fixed block (401). A threaded rod (407) is rotatably connected to the inner side of the mounting hole (406), and a turning handle (408) is fixedly mounted on the top end of the threaded rod (407).

4. The twin-screw extruder for producing TPU plastic particles according to claim 1, characterized in that: The material receiving mechanism (5) comprises a material receiving box (501), the material receiving box (501) is arranged at the bottom end of the workbench (101), a liquid injection box (502) is installed on the inner side of the material receiving box (501), the inner side of the liquid injection box (502) is injected with cooling liquid, a discharge port (503) is provided on one side of the outer surface of the material receiving box (501), and square grooves (504) are provided on both sides of the outer surface of the material receiving box (501), and a support rod (505) is fixedly installed on the inner side of the square groove (504).

5. The twin-screw extruder for producing TPU plastic particles according to claim 4, characterized in that: The surface of the support rod (505) is slidably connected to a sliding block (506), and blocks (507) are fixedly installed on both sides of the outer surface of the sliding block (506), and a movable plate (508) is fixedly installed on one side of the outer surface of the block (507). A second spring (509) is fixedly installed at the bottom end of the sliding block (506) and the inner end of the square groove (504), and a condenser (510) is installed at the bottom end of the movable plate (508). A groove (511) and a diversion groove (512) are provided at the top end of the movable plate (508), and the diversion grooves (512) are symmetrically distributed on both sides of the outer surface of the movable plate (508).

6. The twin-screw extruder for producing TPU plastic particles according to claim 4, characterized in that: A third electric telescopic rod (513) is installed on one side of the outer surface of the material receiving box (501), a push plate (514) is installed on the output end of the third electric telescopic rod (513), and both sides of the outer surface of the push plate (514) are slidably connected to slide rails (515), and the slide rails (515) are fixedly installed on both sides of the inner surface of the material receiving box (501).

Images