Feeding device for plastic powder

Abstract

The application discloses a plastic powder feeding device, which comprises a base, a material pipe is installed on the upper surface of the base, two bearings are installed on the inner wall of the material pipe, a screw conveyor is installed on the inner wall of the two bearings, a driven gear is welded to one end of the screw conveyor, a speed reducer motor is installed on the upper surface of the base, a driving gear is installed on the output end of the speed reducer motor, a chain is engaged with the tooth surface of the driving gear, the tooth surface of the driven gear is engaged with the chain, a hopper is communicated with and fixed to the arc surface of the material pipe, an air filter is communicated with and fixed to the arc surface of the material pipe, and an air amplifier is communicated with and fixed to the position of the material pipe relative to the air filter. The plastic powder feeding device can prevent block-shaped raw materials or impurities in the plastic raw materials from entering the material pipe as much as possible, so that the volume of the plastic raw materials entering the mold is within the qualified range, and the quality of the finished product is improved.

Description

Technical Field

[0001] This invention relates to the field of feeding equipment technology, specifically to a feeding device for plastic powder. Background Technology

[0002] Plastic products are products made by processing plastic raw materials using various molds. The main manufacturing processes include injection molding, blow molding, extrusion, and rotational molding. When using rotational molding to produce plastic products, plastic raw material powder needs to be added into the rotational molding mold using feeding equipment. Then, the plastic raw material in the rotational molding mold is heated to melt it. After the plastic in the rotational molding mold cools down, the corresponding plastic product can be obtained.

[0003] In existing technologies, when plastic powder is fed into a rotational molding die using a feeding device, the powder often contains lumpy materials or impurities. When these lumpy materials or impurities enter the mold along with the powdered material, they are difficult to completely melt or cannot melt at all under the same temperature conditions, resulting in defects in the finished plastic products and affecting their quality. Therefore, we propose a plastic powder feeding device. Summary of the Invention

[0004] The purpose of this invention is to provide a plastic powder feeding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a plastic powder feeding device, comprising a base, a material pipe mounted on the upper surface of the base, two bearings mounted on the inner wall of the material pipe, an auger mounted on the inner wall of the two bearings, a driven gear welded to one end of the auger, a reduction motor mounted on the upper surface of the base, a drive gear mounted on the output end of the reduction motor, a chain meshing with the teeth of the drive gear, and the chain meshing with the teeth of the driven gear, a hopper connected and fixed to the arc surface of the material pipe, an air filter connected and fixed to the arc surface of the material pipe, and an air amplifier connected and fixed to the position of the material pipe relative to the air filter, the air... The lower end of the amplifier is connected to and fixed with a PVC pipe. The end of the PVC pipe away from the air amplifier is connected to and fixed with an iron pipe. The end of the iron pipe away from the PVC pipe is connected to and fixed with a mold. An air compressor is installed on the upper surface of the base. The output end of the air compressor is connected to and fixed with an air pipe. The end of the air pipe away from the air compressor is connected to and fixed with the air amplifier. The system also includes a screening structure disposed on the inner wall of the hopper for screening lumpy materials or impurities; a discharge structure disposed on the side wall of the hopper for facilitating the cleaning of the screened lumpy materials or impurities; and a collection structure disposed on the outer wall of the hopper for collecting the cleaned lumpy materials or impurities.

[0006] Preferably, the screening structure includes two clamping plates, both of which are rotatably connected to the inner wall of the hopper. The inner wall of each clamping plate is provided with a sorting assembly, which includes two screening plates. These screening plates are slidably connected to the inner wall of the hopper, and each screening plate is slidably connected to the inner wall of one of the two clamping plates. The surface of each screening plate has several screening holes. A support bar is horizontally fixedly connected to the inner wall of the hopper. The support bar has a triangular prism structure, and two elastic fabrics are fixedly connected to its lower surface. A clamping plate is fixedly connected to the end of each elastic fabric away from the support bar. The vertical cross-section of the clamping plate is U-shaped. A connecting plate is slidably connected to the inner wall of the card plate. The vertical cross-section of the connecting plate is "L"-shaped. The short arm of the connecting plate is fixedly connected to the screening plate. A vibration assembly is provided on the inner wall of the hopper. The vibration assembly is located below the screening plate. The vibration assembly includes a cross plate. The cross plate is fixedly connected to the inner wall of the hopper. A servo motor is fixedly connected to the upper surface of the cross plate. A cam is fixedly connected to the output end of the servo motor. The arc surface of the cam is slidably connected to the screening plate. A positioning plate is fixedly connected to the lower surface of the support bar. The vertical cross-section of the positioning plate is "human"-shaped. The positioning plate is slidably connected to the two screening plates.

[0007] Preferably, a first elastic strip is fixedly connected to the side of the long arm of the connecting plate near the screening plate. The first elastic strip is made of rubber. A second elastic strip is fixedly connected to the inner wall of the card plate. The second elastic strip is also made of rubber and is located between the first elastic strip and the short arm of the connecting plate.

[0008] Preferably, the upper surface of the clamping plate is provided with a limiting component, the limiting component includes a screw, the screw is threadedly connected to the clamping plate, the screw passes through the clamping plate and abuts against the surface of the screening plate, and a circular plate is fixedly connected to the upper end of the screw.

[0009] Preferably, the discharge structure includes a discharge hole located on the side wall of the hopper. Auxiliary components are provided on both sides of the hopper. Each auxiliary component includes a support plate with an "L"-shaped vertical cross-section. The long arm of the support plate is fixedly connected to the hopper. An electric telescopic rod is fixedly connected to the short arm of the support plate near the hopper. A baffle is fixedly connected to the output end of the electric telescopic rod. The baffle is slidably connected to the inner wall of the discharge hole on the hopper. A distance-fixing component is provided on the surface of the long arm of the support plate. The distance-fixing component includes a rectangular hole located on the surface of the long arm of the support plate. A sliding plate is slidably connected to the inner wall of the rectangular hole on the support plate. A lead screw is fixedly connected to the surface of the sliding plate. A fixing plate is fixedly connected to the upper surface of the long arm of the support plate. The vertical cross-section of the fixing plate is "U"-shaped. The lead screw is located between the two arms of the fixing plate, and a threaded sleeve is threaded onto the arc surface of the lead screw.

[0010] Preferably, the vertical cross-section of the baffle is an isosceles trapezoid, and the baffle is made of stainless steel.

[0011] Preferably, the surface of the threaded sleeve is slidably fitted with a circular sleeve, and the arc surface of the circular sleeve is fixedly connected with four paddles.

[0012] Preferably, the storage structure includes two trays, one end of which is fixedly connected to the hopper. A rectangular tube is slidably fitted onto the surface of the tray. A storage box is fixedly connected to the upper surface of the two rectangular tubes. A receiving plate slides horizontally through the storage box. A strip plate is fixedly connected to one end of the two receiving plates. The strip plate is slidably connected to the storage box.

[0013] Preferably, the storage box is rotatably connected to a rotating plate on the side near the strip plate, and the strip plate has a clearance hole at the position relative to the rotating plate. The size of the clearance hole on the strip plate is adapted to the size of the rotating plate, and the rotating plate is slidably connected to the strip plate.

[0014] Preferably, the upper surface of the tray has a groove, and the size of the groove on the tray is adapted to the size of the rectangular tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. In this invention, by setting a screening structure, when raw materials need to be transferred into the mold, the plastic raw material is poured into the hopper. At this time, the powdery raw material will fall onto the screening plate and fall into the material pipe through the screening holes on the surface of the screening plate. At this time, the reduction motor is started. The output end of the reduction motor rotates, which drives the drive gear to rotate. The chain, through the rotation of the drive gear, drives the driven gear to rotate. The rotation of the driven gear drives the auger to rotate. The spiral structure of the auger will drive the plastic raw material to move along the inner wall of the material pipe. The auger achieves the goal of preventing the powdery plastic raw material from clogging the material pipe as much as possible. Afterwards, the plastic raw material will fall into the air amplifier. At the same time, the air compressor is started. The air compressor compresses the air and delivers it into the air pipe. Then, the high-pressure gas will enter the air amplifier and... The plastic raw material inside the gas amplifier is fully dispersed. This dispersed material is then evenly transferred to the mold through PVC and iron pipes, effectively dispersing the plastic powder evenly within the confined space of the mold. During the falling of the plastic powder, a servo motor is activated. The output of the servo motor rotates, driving a cam to rotate. This cam presses against the screening plate, causing it to rotate upwards. As the screening plate rotates, it disengages from the positioning plate and stretches the elastic cloth. The stretched elastic cloth helps prevent lumpy material or impurities from falling through the gap between the two screening plates. As the cam continues to rotate, it disengages from the screening plate, causing the elastic cloth to contract. The screening plate then rotates in the opposite direction due to the tension of the elastic cloth, thus completing the screening process. When the plate rotates, it contacts the positioning plate. At this point, the positioning plate limits the rotation angle of the screening plate. Therefore, the output of the servo motor runs continuously, causing the screening plate to vibrate continuously, allowing the powder material to pass through quickly. At this time, lumpy materials or impurities will remain on the upper surface of the screening plate. The screening plate can prevent lumpy materials or impurities from falling into the feed pipe. When it is necessary to screen lumpy materials or impurities of different volumes, first rotate the circular plate. The rotation of the circular plate will drive the screw to rotate. When the screw rotates, it will move by means of the thread. After the screw disengages from the screening plate, pull the clamping plate. The clamping plate moves and disengages from the connecting plate. Then, the screening plate can be removed from the inner wall of the clamping plate. Then, the required screening plate is slid back in along the inner wall of the clamping plate, and so on. As the circular plate rotates, the screw, aided by its threads, presses against the surface of the screening plate, thus limiting its position. Pulling the clamping plate causes its inner wall to slide along the surface of the connecting plate's long arm. This movement of the clamping plate causes the first elastic strip to slide, which in turn compresses the second elastic strip. Both the rubber elastic strips deform at this point. Continued sliding of the clamping plate causes the first and second elastic strips to disengage. This separation of the clamping plate from the connecting plate minimizes the risk of the clamping plate detaching from the connecting plate. The detachable design of the screening plate allows for easy replacement as needed. The triangular prism structure of the support bars helps prevent the accumulation of plastic powder on their surface. This sieving structure...This system can minimize the entry of lumpy materials or impurities from the plastic raw material into the feed tube, thus ensuring that the volume of plastic raw material entering the mold is within acceptable limits, thereby improving the quality of the finished product.

[0017] 2. In this invention, by setting up a discharge structure, when it is necessary to clean the lumpy raw materials or impurities accumulated on the upper surface of the screening plate, the electric telescopic rod is activated. The retraction of the output end of the electric telescopic rod will cause the baffle to slide out from the inner wall of the discharge hole. The sliding of the baffle will cause the slide plate to slide along the inner wall of the rectangular hole. At this time, the slide plate will achieve the function of preventing the baffle from rotating as much as possible. The sliding of the slide plate will cause the lead screw to slide synchronously. The sliding of the lead screw will cause the threaded sleeve to move towards the fixed plate. When the threaded sleeve abuts against the surface of the fixed plate, the fixed plate will limit the position of the threaded sleeve, thereby limiting the stroke of the baffle and limiting the sliding speed of the lumpy raw materials or impurities from the discharge hole. When it is necessary to adjust the sliding speed of the lumpy raw materials or impurities from the discharge hole, the round sleeve is slidably fitted onto the outer wall of the threaded sleeve, and then the round sleeve is rotated with the help of a lever. The rotation of the round sleeve will drive the threaded sleeve to rotate. The rotating sleeve moves using the threaded movement. After adjusting the threaded sleeve to the appropriate position, slide the circular sleeve away from the fixed plate to disengage it from the threaded sleeve. At this point, the circular sleeve will be located between the threaded sleeve and the sliding plate. This is to prevent the paddle from being accidentally touched, which could cause the threaded sleeve to change position. When it is necessary to add plastic raw materials to the hopper again, the electric telescopic rod is activated again. The output end of the electric telescopic rod extends and drives the baffle to slide back along the inner wall of the discharge hole. By setting the vertical cross-section of the baffle to an isosceles trapezoid, the sliding distance of the baffle can be limited, preventing the baffle from sliding through the discharge hole as much as possible. This allows the baffle to better seal the discharge hole. By setting the discharge structure, it is possible to easily remove and clean the lumpy raw materials or impurities accumulated on the upper surface of the screening plate, thereby ensuring that the screening plate can work normally.

[0018] 3. In this invention, by setting up a storage structure, when it is necessary to collect blocky raw materials or impurities, firstly, the strip plate is moved. The movement of the strip plate will cause the receiving plate to slide along the inside of the storage box. During this process, the inner wall of the clearance hole opened on the surface of the strip plate will slide along the surface of the rotating plate. When the strip plate contacts the storage box, the rotating plate will disengage from the inner wall of the clearance hole. At this time, the rotating plate is rotated, and the side of the rotating plate near the storage box will contact the strip plate. The rotating plate achieves the function of restricting the position of the strip plate and thus restricting the position of the receiving plate. Then, the storage box is moved so that the rectangular tube slides onto the surface of the tray. Then, the rectangular tube slides along the surface of the tray. When the rectangular tube is aligned with the groove, the storage box will be subjected to... The rectangular tube, under its own weight, slides downwards along the inner wall of the groove. At this point, the groove restricts the position of the rectangular tube, preventing it from sliding further along the surface of the support plate. When lumpy raw materials or impurities fall from the discharge hole, they first slide down the surface of the receiving plate into the collection box. The receiving plate then prevents the lumpy raw materials or impurities from popping out of the collection box again. The collection box collects the lumpy raw materials or impurities for subsequent centralized processing. By setting up the collection structure, the lumpy raw materials or impurities can be collected for convenient subsequent centralized processing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the auger section of the present invention;

[0021] Figure 3 For the present invention Figure 1 A schematic diagram of a partial structure;

[0022] Figure 4 This is a partial structural diagram of the hopper of the present invention;

[0023] Figure 5 For the present invention Figure 4 A schematic diagram of a partial cross-sectional structure;

[0024] Figure 6 This is a partial cross-sectional schematic diagram of the screening structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the clamping plate in this invention;

[0026] Figure 8 This is a schematic diagram of the structure of the cross plate in this invention;

[0027] Figure 9 For the present invention Figure 4 A schematic diagram of a partial structure;

[0028] Figure 10 This is a partial structural diagram of the storage structure of the present invention;

[0029] Figure 11 For the present invention Figure 10 The diagram below shows a partial structure.

[0030] In the diagram: 1 - Base; 2 - Material pipe; 3 - Bearing; 4 - Screw; 5 - Driven gear; 6 - Gear motor; 7 - Screening structure; 71 - Clamping plate; 72 - Sorting component; 721 - Screening plate; 722 - Screening hole; 723 - Support bar; 724 - Elastic cloth; 725 - Clamping plate; 726 - Connecting plate; 727 - First elastic bar; 728 - Second elastic bar; 73 - Positioning plate; 74 - Limiting component; 741 - Screw; 742 - Circular plate; 75 - Vibration component; 751 - Cross plate; 752 - Servo motor; 753 - Cam; 8 - Discharge structure; 81 - Discharge hole; 82 - Auxiliary component; 821 - Support plate; 822 - Electric telescopic rod; 823 - Baffle; 83 - Distance fixing component; 831 - Rectangular hole; 832 - Slide plate; 833 - Fixing plate; 834 - Lead screw; 835 - Threaded sleeve; 836 - Round sleeve; 837 - Paddle; 9 - Storage structure; 91 - Support plate; 92 - Rectangular tube; 93 - Storage box; 94 - Receiving plate; 95 - Strip plate; 96 - Clearance hole; 97 - Turning plate; 98 - Groove; 10 - Drive gear; 11 - Chain; 12 - Hopper; 13 - Air filter; 14 - Air amplifier; 15 - PVC pipe; 16 - Iron pipe; 17 - Mold; 18 - Air compressor; 19 - Air pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1 and Figure 2This invention provides a technical solution: a plastic powder feeding device, comprising a base 1, a material pipe 2 mounted on the upper surface of the base 1, two bearings 3 mounted on the inner wall of the material pipe 2, an auger 4 mounted on the inner wall of the two bearings 3, a driven gear 5 welded to one end of the auger 4, a reduction motor 6 mounted on the upper surface of the base 1, a drive gear 10 mounted on the output end of the reduction motor 6, a chain 11 meshing with the teeth of the drive gear 10, and the teeth of the driven gear 5 meshing with the chain 11. A hopper 12 is connected to and fixed to the arc surface of the material pipe 2, an air filter 13 is connected to and fixed to the arc surface of the material pipe 2, an air amplifier 14 is connected to and fixed to the position of the material pipe 2 relative to the air filter 13, and the lower end of the air amplifier 14 is connected to and fixed to... The system includes a PVC pipe 15, with an iron pipe 16 connected and fixed to the end of the PVC pipe 15 away from the air amplifier 14, and a mold 17 connected and fixed to the end of the iron pipe 16 away from the PVC pipe 15. An air compressor 18 is mounted on the upper surface of the base 1, and an air pipe 19 is connected and fixed to the output end of the air compressor 18. The end of the air pipe 19 away from the air compressor 18 is connected and fixed to the air amplifier 14. The system also includes a screening structure 7, which is respectively set on the inner wall of the hopper 12 for screening lumpy materials or impurities; a discharge structure 8, which is respectively set on the side wall of the hopper 12 for facilitating the cleaning of lumpy materials or impurities after screening; and a collection structure 9, which is respectively set on the outer wall of the hopper 12 for collecting the cleaned lumpy materials or impurities.

[0033] The following section will explain the specific setup and function of its screening structure 7, discharge structure 8, and collection structure 9.

[0034] like Figure 2-8As shown, the screening structure 7 includes two clamping plates 71, both of which are rotatably connected to the inner wall of the hopper 12. A sorting assembly 72 is provided on the inner wall of the clamping plates 71, comprising two screening plates 721. The screening plates 721 are slidably connected to the inner wall of the hopper 12, and the two screening plates 721 are respectively slidably connected to the inner walls of the two clamping plates 71. Several screening holes 722 are opened on the surface of the screening plates 721. A support bar 723 is horizontally fixedly connected to the inner wall of the hopper 12. The support bar 723 has a triangular prism structure. Two elastic cloths 724 are fixedly connected to the lower surface of the support bar 723. A clamping plate 725 is fixedly connected to the end of the elastic cloth 724 away from the support bar 723. The vertical cross-section of the clamping plate 725 is U-shaped. A connecting plate 726 is slidably connected to the inner wall of 5. The vertical cross section of the connecting plate 726 is "L" shaped. The short arm of the connecting plate 726 is fixedly connected to the screening plate 721. A vibration component 75 is provided on the inner wall of the hopper 12. The vibration component 75 is located below the screening plate 721. The vibration component 75 includes a cross plate 751. The cross plate 751 is fixedly connected to the inner wall of the hopper 12. A servo motor 752 is fixedly connected to the upper surface of the cross plate 751. A cam 753 is fixedly connected to the output end of the servo motor 752. The arc surface of the cam 753 is slidably connected to the screening plate 721. A positioning plate 73 is fixedly connected to the lower surface of the support bar 723. The vertical cross section of the positioning plate 73 is "human" shaped. The positioning plate 73 is slidably connected to the two screening plates 721.

[0035] like Figure 3-8 As shown, a first elastic strip 727, made of rubber, is fixedly connected to the side of the long arm of the connecting plate 726 near the screening plate 721. A second elastic strip 728, also made of rubber, is fixedly connected to the inner wall of the clamping plate 725. The second elastic strip 728 is located between the first elastic strip 727 and the short arm of the connecting plate 726. A limiting component 74 is provided on the upper surface of the clamping plate 71. The limiting component 74 includes a screw 741, which is threadedly connected to the clamping plate 71. The screw 741 passes through the clamping plate 71 and abuts against the surface of the screening plate 721. A circular plate 742 is fixedly connected to the upper end of the screw 741.

[0036] like Figure 4 and Figure 9As shown, the discharge structure 8 includes a discharge hole 81, which is located on the side wall of the hopper 12. Auxiliary components 82 are provided on both sides of the hopper 12. Each auxiliary component 82 includes a support plate 821 with an "L"-shaped vertical cross-section. The long arm of the support plate 821 is fixedly connected to the hopper 12, and an electric telescopic rod 822 is fixedly connected to the short arm of the support plate 821 near the hopper 12. A baffle 823 is fixedly connected to the output end of the electric telescopic rod 822, and the baffle 823 is slidably connected to the inner wall of the discharge hole 81 on the hopper 12. The surface of the long arm 821 is provided with a distance fixing component 83, which includes a rectangular hole 831. The rectangular hole 831 is formed on the surface of the long arm of the support plate 821. A slide plate 832 is slidably connected to the inner wall of the rectangular hole 831 on the support plate 821. A lead screw 834 is fixedly connected to the surface of the slide plate 832. A fixing plate 833 is fixedly connected to the upper surface of the long arm of the support plate 821. The vertical cross-section of the fixing plate 833 is U-shaped. The lead screw 834 is located between the two arms of the fixing plate 833. A threaded sleeve 835 is threadedly connected to the arc surface of the lead screw 834. The vertical cross-section of the baffle 823 is an isosceles trapezoid. The baffle 823 is made of stainless steel. A circular sleeve 836 is slidably fitted on the surface of the threaded sleeve 835. Four levers 837 are fixedly connected to the arc surface of the circular sleeve 836.

[0037] like Figure 5 and Figure 10 as well as Figure 11 As shown, the storage structure 9 includes two trays 91. One end of each tray 91 is fixedly connected to the hopper 12. A rectangular tube 92 is slidably fitted onto the surface of each tray 91. A storage box 93 is fixedly connected to the upper surface of the two rectangular tubes 92. A receiving plate 94 slides horizontally through the storage box 93. A strip plate 95 is fixedly connected to one end of each receiving plate 94. The strip plate 95 is slidably connected to the storage box 93. A rotating plate 97 is rotatably connected to the side of the storage box 93 near the strip plate 95. A clearance hole 96 is provided on the strip plate 95 relative to the rotating plate 97. The size of the clearance hole 96 on the strip plate 95 matches the size of the rotating plate 97. The rotating plate 97 is slidably connected to the strip plate 95. A groove 98 is provided on the upper surface of the tray 91. The size of the groove 98 on the tray 91 matches the size of the rectangular tube 92.

[0038] Working principle: When raw materials need to be fed into the mold 17, the plastic raw material is poured into the hopper 12. At this time, the powdery raw material will fall onto the sieve plate 721 and fall into the material pipe 2 through the sieve holes 722 on the surface of the sieve plate 721. At this time, the reduction motor 6 is started. The output end of the reduction motor 6 rotates, which drives the drive gear 10 to rotate. The chain 11, with the help of the drive gear 10, drives the driven gear 5 to rotate. The driven gear 5 rotates, which drives the auger 4 to rotate. The spiral structure of the auger 4 will drive the plastic raw material to move along the inner wall of the material pipe 2. To minimize the risk of powdered plastic material clogging the material pipe 2, the plastic material will then fall into the air amplifier 14. At the same time, the air compressor 18 is started, compressing the air and delivering it into the air pipe 19. The high-pressure gas then enters the air amplifier 14 and fully disperses the plastic material inside. The dispersed plastic material is then evenly transferred to the mold 17 through the PVC pipe 15 and the iron pipe 16, effectively dispersing the plastic material powder evenly into the confined space of the mold 17.

[0039] During the falling process of plastic raw material powder, the servo motor 752 is activated. The output end of the servo motor 752 rotates, which drives the cam 753 to rotate. At this time, the cam 753 will squeeze the screening plate 721, causing the screening plate 721 to rotate upward. The rotation of the screening plate 721 will disengage from the positioning plate 73 and stretch the elastic cloth 724. At this time, the elastic cloth 724 is in a stretched state, which helps to prevent lumpy raw materials or impurities from falling from the gap between the two screening plates 721. As the cam 753 continues to rotate, it will disengage from the screening plate 721. At this time, the elastic cloth 724 begins to contract, and the screening plate 721 will be supported by the elastic cloth 724. The tension of 4 rotates in the opposite direction, causing the sieve plate 721 to rotate and contact the positioning plate 73. At this time, the positioning plate 73 limits the rotation angle of the sieve plate 721. Therefore, the output of the servo motor 752 continues to operate, enabling the sieve plate 721 to vibrate continuously, thus allowing the powder raw material to pass through quickly. At this time, lumpy raw materials or impurities will remain on the upper surface of the sieve plate 721. The sieve plate 721 can prevent lumpy raw materials or impurities from falling into the feed pipe 2. When it is necessary to sieve lumpy raw materials or impurities of different volumes, first rotate the circular plate 742. The rotation of the circular plate 742 will drive the screw 741 to rotate. 1. During rotation, the screw moves using the threaded mechanism. When the screw 741 disengages from the screening plate 721, it pulls the clamping plate 725. The clamping plate 725 moves and disengages from the connecting plate 726, allowing the screening plate 721 to be removed from the inner wall of the clamping plate 725. Then, the desired screening plate 721 slides back into the clamping plate 725. Next, the circular plate 742 rotates in the opposite direction. At this point, the screw 741, using the thread, presses against the surface of the screening plate 721, thus limiting its position. Then, the clamping plate 725 is pulled, causing its inner wall to slide along the surface of the long arm of the connecting plate 726. The movement of the clamping plate 725 drives the first spring... When the first elastic strip 727 slides, it will compress the second elastic strip 728. At this time, both the first elastic strip 727 and the second elastic strip 728, which are made of rubber, will deform. If the clamping plate 725 continues to slide, the first elastic strip 727 and the second elastic strip 728 will lose contact. At this time, the first elastic strip 727 and the second elastic strip 728 achieve the function of preventing the clamping plate 725 from losing contact with the connecting plate 726 as much as possible. By making the screening plate 721 detachable, it is easy to replace the screening plate 721 according to the actual situation. The support strip 723, which has a triangular prism structure, can minimize the accumulation of plastic powder on its surface.

[0040] When it is necessary to clean the lumpy raw materials or impurities accumulated on the upper surface of the screening plate 721, the electric telescopic rod 822 is activated. The retraction of the output end of the electric telescopic rod 822 will cause the baffle 823 to slide out from the inner wall of the discharge hole 81. The sliding of the baffle 823 will cause the slide plate 832 to slide along the inner wall of the rectangular hole 831. At this time, the slide plate 832 will prevent the baffle 823 from rotating as much as possible. The sliding of the slide plate 832 will cause the lead screw 834 to slide synchronously. The sliding of the lead screw 834 will cause the threaded sleeve 835 to move towards the fixed plate 833. When the threaded sleeve 835 abuts against the surface of the fixed plate 833, the fixed plate 833 will limit the position of the threaded sleeve 835, thereby limiting the stroke of the baffle 823 and limiting the sliding speed of the lumpy raw materials or impurities from the discharge hole 81. When it is necessary to adjust the sliding speed of the lumpy raw materials or impurities from the discharge hole 81, the round sleeve 836 is slid onto the outer wall of the threaded sleeve 835, and then the lever 83 is used to adjust the sliding speed of the lumpy raw materials or impurities from the discharge hole 81. 7. Rotate the circular sleeve 836. The rotation of the circular sleeve 836 will drive the threaded sleeve 835 to rotate. The rotation of the threaded sleeve 835 will move by means of the thread. After adjusting the threaded sleeve 835 to a suitable position, slide the circular sleeve 836 away from the fixed plate 833 so that the circular sleeve 836 and the threaded sleeve 835 are disengaged. At this time, the circular sleeve 836 will be located between the threaded sleeve 835 and the sliding plate 832. Try to prevent the paddle 837 from being accidentally touched, which would cause the position of the threaded sleeve 835 to change. When it is necessary to add plastic raw materials into the hopper 12 again, the electric telescopic rod 822 is activated again. The output end of the electric telescopic rod 822 extends and drives the baffle 823 to slide back into the inner wall of the discharge hole 81. By setting the vertical section of the baffle 823 to be an isosceles trapezoid, the sliding distance of the baffle 823 can be limited, and the baffle 823 can be prevented from sliding through the discharge hole 81 as much as possible, so that the baffle 823 can better seal the discharge hole 81.

[0041] When it is necessary to collect lumpy raw materials or impurities, first move the strip plate 95. The movement of the strip plate 95 will cause the receiving plate 94 to slide along the inside of the storage box 93. During this process, the inner wall of the clearance hole 96 on the surface of the strip plate 95 will slide along the surface of the rotating plate 97. When the strip plate 95 contacts the storage box 93, the rotating plate 97 will disengage from the inner wall of the clearance hole 96. At this time, rotate the rotating plate 97, and the side of the rotating plate 97 closest to the storage box 93 will contact the strip plate 95. The rotating plate 97 achieves the function of restricting the position of the strip plate 95 and thus restricting the position of the receiving plate 94. Then move the storage box 93 so that the rectangular tube 92 slides onto the surface of the tray 91, and then slides along the surface of the tray 91. When the rectangular tube 92 is aligned with the groove 98, the storage box 93 will slide the rectangular tube 92 downward along the inner wall of the groove 98 due to its own gravity. At this time, the groove 98 restricts the position of the rectangular tube 92 and prevents the rectangular tube 92 from continuing to slide along the surface of the support plate 91. When the blocky raw material or impurities fall from the discharge hole 81, the blocky raw material or impurities will first slide down along the surface of the receiving plate 94 into the storage box 93. At this time, the receiving plate 94 prevents the blocky raw material or impurities from popping out of the storage box 93 again. The storage box 93 collects the blocky raw material or impurities for subsequent centralized processing.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic powder feeding device, comprising a base (1), characterized in that: A material pipe (2) is installed on the upper surface of the base (1). Two bearings (3) are installed on the inner wall of the material pipe (2). An auger (4) is installed on the inner wall of the two bearings (3). A driven gear (5) is welded to one end of the auger (4). A geared motor (6) is installed on the upper surface of the base (1). A drive gear (10) is installed at the output end of the geared motor (6). A chain (11) meshes with the tooth surface of the drive gear (10). The tooth surface of the driven gear (5) meshes with the chain (11). A hopper (12) is connected to and fixed on the arc surface of the material pipe (2). An air filter (13) is connected to and fixed on the arc surface of the material pipe (2). The material pipe (2) is connected to and fixed with an air amplifier (14) relative to the air filter (13). The lower end of the air amplifier (14) is connected to and fixed with a PVC pipe (15). The end of the PVC pipe (15) away from the air amplifier (14) is connected to and fixed with an iron pipe (16). The end of the iron pipe (16) away from the PVC pipe (15) is connected to and fixed with a mold (17). An air compressor (18) is installed on the upper surface of the base (1). The output end of the air compressor (18) is connected to and fixed with an air pipe (19). The end of the air pipe (19) away from the air compressor (18) is connected to and fixed with the air amplifier (14). The system also includes: A screening structure (7) is respectively installed on the inner wall of the hopper (12) for screening lumpy materials or impurities. The screening structure (7) includes two clamping plates (71), both of which are rotatably connected to the inner wall of the hopper (12). The inner wall of the clamping plates (71) is provided with a sorting component (72), which includes two screening plates (721). The screening plates (721) are slidably connected to the inner wall of the hopper (12). The sieve plate (721) is slidably connected to the inner walls of the two clamping plates (71). Several sieve holes (722) are opened on the surface of the sieve plate (721). A support strip (723) is horizontally fixedly connected to the inner wall of the hopper (12). The support strip (723) has a triangular prism structure. Two elastic cloths (724) are fixedly connected to the lower surface of the support strip (723). A clamping plate (725) is fixedly connected to the end of the elastic cloth (724) away from the support strip (723). The vertical cross section of the hopper (725) is U-shaped. A connecting plate (726) is slidably connected to the inner wall of the hopper (725). The vertical cross section of the connecting plate (726) is L-shaped. The short arm of the connecting plate (726) is fixedly connected to the screening plate (721). The inner wall of the hopper (12) is provided with a vibration assembly (75). The vibration assembly (75) is located below the screening plate (721). The vibration assembly (75) includes a cross plate (751). The cross plate (751) is connected to the hopper (12). 2) The inner wall is fixedly connected, the upper surface of the cross plate (751) is fixedly connected to a servo motor (752), the output end of the servo motor (752) is fixedly connected to a cam (753), the arc surface of the cam (753) is slidably connected to the screening plate (721), the lower surface of the support bar (723) is fixedly connected to a positioning plate (73), the vertical section of the positioning plate (73) is in the shape of a "human", and the positioning plate (73) is slidably connected to the two screening plates (721); Discharge structures (8) are respectively set on the side walls of the hopper (12) to facilitate the cleaning of sieving blocky materials or impurities. The discharge structure (8) includes a discharge hole (81) which is opened on the side wall of the hopper (12). Auxiliary components (82) are provided on both sides of the hopper (12). The auxiliary components (82) include a support plate (821). The vertical cross section of the support plate (821) is "L" shaped. The long arm of the support plate (821) is fixedly connected to the hopper (12). An electric telescopic rod (822) is fixedly connected to the side of the short arm of the support plate (821) near the hopper (12). A baffle (823) is fixedly connected to the output end of the electric telescopic rod (822). The baffle (823) is connected to the hopper (12). 12) The inner wall of the upper discharge hole (81) is slidably connected. The surface of the long arm of the support plate (821) is provided with a distance fixing component (83). The distance fixing component (83) includes a rectangular hole (831). The rectangular hole (831) is opened on the surface of the long arm of the support plate (821). The inner wall of the rectangular hole (831) on the support plate (821) is slidably connected with a slide plate (832). The surface of the slide plate (832) is fixedly connected with a lead screw (834). The upper surface of the long arm of the support plate (821) is fixedly connected with a fixing plate (833). The vertical section of the fixing plate (833) is "U". The lead screw (834) is located between the two arms of the fixing plate (833). The arc surface of the lead screw (834) is threadedly connected with a threaded sleeve (835). A collection structure (9) is set on the outer wall of the hopper (12) to collect the cleaned blocky materials or impurities. The collection structure (9) includes two trays (91). One end of the tray (91) is fixedly connected to the hopper (12). A rectangular tube (92) is slidably fitted on the surface of the tray (91). A collection box (93) is fixedly connected to the upper surface of the two rectangular tubes (92). A receiving plate (94) slides horizontally through the collection box (93). A strip plate (95) is fixedly connected to one end of the two receiving plates (94). The strip plate (95) is slidably connected to the collection box (93).

2. The plastic powder feeding device according to claim 1, characterized in that: A first elastic strip (727) is fixedly connected to the side of the long arm of the connecting plate (726) near the screening plate (721). The first elastic strip (727) is made of rubber. A second elastic strip (728) is fixedly connected to the inner wall of the clamping plate (725). The second elastic strip (728) is made of rubber and is located between the first elastic strip (727) and the short arm of the connecting plate (726).

3. The plastic powder feeding device according to claim 1, characterized in that: The upper surface of the clamp (71) is provided with a limiting component (74), which includes a screw (741) and a circular plate (742). The screw (741) is threadedly connected to the clamping plate (71), and the screw (741) passes through the clamping plate (71) and abuts against the surface of the screening plate (721); The circular plate (742) is fixedly connected to the upper end of the screw (741) and is used to drive the screw (741) to rotate.

4. The plastic powder feeding device according to claim 1, characterized in that: The vertical cross section of the baffle (823) is an isosceles trapezoid, and the baffle (823) is made of stainless steel.

5. The plastic powder feeding device according to claim 1, characterized in that: The threaded sleeve (835) has a circular sleeve (836) slidingly mounted on its surface, and four paddles (837) are fixedly connected to the arc surface of the circular sleeve (836).

6. The plastic powder feeding device according to claim 1, characterized in that: The storage box (93) is rotatably connected to a rotating plate (97) on the side near the strip plate (95). The strip plate (95) has a clearance hole (96) at a position relative to the rotating plate (97). The size of the clearance hole (96) on the strip plate (95) is adapted to the size of the rotating plate (97). The rotating plate (97) is slidably connected to the strip plate (95).

7. The plastic powder feeding device according to claim 1, characterized in that: The upper surface of the tray (91) is provided with a groove (98), and the size of the groove (98) on the tray (91) is adapted to the size of the rectangular tube (92).

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