A self-priming plastic granule feeding device

Abstract

The present invention relates to the technical field of plastic particle feeding devices, and discloses a self-priming plastic particle feeding device, including a silo, a conveying pipe, a negative pressure mechanism, a mixing silo and an extruder. The negative pressure mechanism forms a negative pressure in the two conveying pipes, and respectively conveys the plastic particles and masterbatches in the two silos to the mixing silo through the two conveying pipes for mixing. A proportioning mechanism, a driving mechanism and a mixing mechanism are provided in the mixing silo. The proportioning mechanism includes a plurality of proportioning tanks. The driving mechanism drives the plurality of proportioning tanks to rotate, and alternately passes under the two vertical pipes. The proportioned materials fall into the mixing mechanism for mixing, and the mixed materials are conveyed to the extruder. The self-priming plastic particle feeding device of the present invention realizes the coordinated operation of material conveying, impurity separation, precise proportioning and efficient mixing through an integrated structural design, which significantly improves the degree of automation and operational stability of the feeding link of the film blowing machine.

Description

Technical Field

[0001] The invention relates to the technical field of plastic particle feeding devices, in particular to a self-priming plastic particle feeding device. Background Art

[0002] The film blowing machine is the core equipment for producing plastic films in the plastic processing industry. It melts plastic particles through the extrusion blow molding process and blows them into films. It is widely used in packaging, agriculture, medical and other fields. It mainly includes material mixing and conveying, extrusion melting, die head forming, blowing and traction, cooling and shaping, winding and other steps. In the material mixing and conveying stage, the feeding equipment of the film blowing machine is a key component of the film production line. It is mainly responsible for the transportation, metering and mixing of raw materials to ensure the continuity and stability of the production process.

[0003] The existing feeding equipment is mainly composed of a proportioning mechanism, a mixer and an extruder. The plastic particles may contain dust and large sticky particles, which cannot be screened by the existing feeding equipment. The large sticky particles cannot be completely plasticized in the melt, forming tiny hard spots, resulting in bulges or uneven light transmittance on the surface of the film, which can easily cause uneven color and performance fluctuations of the film. Dust particles act as stress concentration points and may cause microcracks when the film is stretched, reducing puncture resistance or tear strength. Secondly, in order to improve the accuracy of the proportioning of plastic particles and masterbatches, the proportioning mechanism is designed to be more complex, with multiple action components and sensor components. It is more expensive and more prone to failure problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a self-priming plastic particle feeding device.

[0005] To solve the above technical problems, the present invention provides a technical solution as follows: a self-priming plastic granule feeding device, comprising a silo, a conveying pipe, a mixing silo and an extruder, wherein two conveying pipes respectively convey the plastic granules and masterbatch in the two silos to the mixing silo for mixing, and the mixed materials are conveyed to the extruder;

[0006] The conveying pipe includes a feed pipe, a distribution pipe and a vertical pipe. The two ends of the distribution pipe are connected to the feed pipe and the vertical pipe respectively, and the feed pipe is connected to the bottom of the silo;

[0007] It also includes a negative pressure mechanism, which includes a negative pressure bin, a negative pressure pipe and a filter bag. One end of the negative pressure pipe extends into the negative pressure bin and is connected to the filter bag, and the other end extends into the distribution pipe, and a filter cone is provided at the end;

[0008] The mixing bin is equipped with a proportioning mechanism, a driving mechanism and a mixing mechanism. The proportioning mechanism includes multiple proportioning tanks. The driving mechanism drives the multiple proportioning tanks to rotate and alternately pass under the two vertical pipes. After proportioning, the materials fall into the mixing mechanism for mixing.

[0009] As an improvement: the distribution pipe is tilted upward and connected to the top of the vertical pipe. The diameter of the distribution pipe is larger than the feeding pipe. Both distribution pipes are provided with a collecting pipe, and the bottom of the collecting pipe is connected to the waste box.

[0010] As an improvement: the proportioning mechanism also includes a fixed platform, a lower turntable, an upper turntable and a fixed inclined platform. The fixed platform and the fixed inclined platform are fixedly arranged in the mixing bin. The driving mechanism drives the lower turntable and the upper turntable to rotate in the fixed platform and the fixed inclined platform respectively. Multiple proportioning tanks are evenly arranged between the lower turntable and the upper turntable.

[0011] As an improvement: the proportioning tank includes a rotating drum and a fixed drum, the vertical section at the bottom of the rotating drum and the top of the fixed drum are slidingly matched, the fixed inclined platform and the upper turntable are inclined, the inclined section at the top of the rotating drum is rotationally matched with the through hole on the upper turntable, the fixed drum is fixedly installed in the through hole of the lower turntable, and the lower turntable is transmission connected to the upper turntable.

[0012] As an improvement: the fixed platform and the top of the upper turntable are respectively provided with annular groove one and annular groove two, the bottom of the vertical pipe passes through the through hole on the fixed inclined platform and extends into annular groove two, the bottom of the fixed cylinder extends into annular groove one, and an outlet hole is provided on annular groove one. The bottom of the vertical pipe for conveying plastic particles is at the lowest position of annular groove two, and the height of the point in the annular groove two corresponding to the axis of the vertical pipe for conveying masterbatch is level with the height of the point in the annular groove two corresponding to the outlet hole.

[0013] As an improvement: the driving mechanism includes a motor 1, a driving shaft and a transmission platform. The motor 1 drives the driving shaft to rotate in the mixing bin, and the driving shaft drives the lower turntable to rotate through the transmission platform. The mixing mechanism includes a mixing box and an agitator. The driving shaft drives the agitator to rotate in the mixing box.

[0014] As an improvement: a spline shaft is provided at the bottom of the transmission platform, a spline groove is provided on the top of the drive shaft to cooperate with the spline shaft, a spring connected to the drive shaft is provided at the inner through hole of the spline shaft, multiple plug-ins are provided on the top of the transmission platform, a transmission shaft is provided at the axis center of the lower turntable, and multiple slots are provided at the bottom of the transmission shaft to cooperate with the plug-ins.

[0015] As an improvement: an arc-shaped platform is provided on the side of the lower turntable, and a limiting mechanism is provided on the mixing bin. The limiting mechanism includes a cylinder and a limiting slider. The cylinder pushes the limiting slider to slide in the through hole of the mixing bin, and the end of the limiting slider is limitedly matched with the raised plane of the arc-shaped platform.

[0016] As an improvement: a transmission folding rod is provided in the multiple through holes on the side of the upper turntable axis, the top inclined section of the transmission folding rod rotates and slides with the through hole of the upper turntable, and the vertical section at the bottom of the transmission folding rod rotates and slides with the through hole on the top side of the transmission shaft.

[0017] The beneficial effects of the present invention compared with the prior art are as follows: the self-priming plastic particle feeding device of the present invention realizes the coordinated operation of material transportation, impurity separation, precise proportioning and efficient mixing through an integrated structural design, significantly improving the automation level and operational stability of the film blowing machine feeding link. Specifically:

[0018] 1. The negative pressure mechanism is combined with the inclined distribution pipe design to automatically separate dust and large particles of impurities by utilizing the air flow velocity difference, reducing the risk of pipeline blockage. At the same time, dust is collected through the filter cone and filter bag to improve the working environment.

[0019] 2. The driving mechanism drives the proportioning tank to alternately receive different materials. Combined with the height difference of the ring groove and the volume change of the proportioning tank, the dynamic and accurate proportion of plastic particles and masterbatch is achieved. The proportion can be flexibly adjusted by adjusting the tilt angle, and the structure is simpler.

[0020] 3. The proportioned materials are compacted by vibration and then enter the mixing mechanism, where they are fully stirred by the agitator. The synchronous operation design driven by a single power source reduces energy consumption while improving the mixing effect.

[0021] 4. It integrates negative pressure conveying, automatic proportioning and efficient mixing to reduce manual intervention. It can also expand the multi-material batching function by adding points to adapt to diversified production needs and provide stable and high-quality raw materials for subsequent extrusion links. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the main structure of the present invention.

[0024] Figure 3 It is an exploded view of the main structure of the present invention.

[0025] Figure 4 It is a partial cross-sectional view of the delivery pipe and the negative pressure mechanism of the present invention.

[0026] Figure 5 It is a cross-sectional view of the negative pressure mechanism of the present invention.

[0027] Figure 6 It is an exploded view of the delivery pipe and proportioning mechanism of the present invention.

[0028] Figure 7 It is a cross-sectional view of the delivery pipe and proportioning mechanism of the present invention.

[0029] Figure 8 It is a structural schematic diagram of the proportioning mechanism of the present invention.

[0030] Figure 9 It is a structural schematic diagram of the driving mechanism of the present invention.

[0031] Figure 10 The explosion of the driving mechanism of the present invention Figure 1 .

[0032] Figure 11 The explosion of the driving mechanism of the present invention Figure 2 .

[0033] Figure 12 It is a cross-sectional view of the mixing mechanism and extruder of the present invention.

[0034] As shown in the figure: 1. Silo; 2. Conveying pipe; 3. Negative pressure mechanism; 4. Mixing silo; 5. Proportioning mechanism; 6. Driving mechanism; 7. Mixing mechanism; 8. Limiting mechanism; 9. Extruder; 21. Feed pipe; 22. Distribution pipe; 23. Vertical pipe; 24. Collection pipe; 31. Negative pressure silo; 32. Negative pressure pipe; 33. Filter bag; 34. Filter cone; 51. Fixed platform; 511. Ring groove 1; 512. Conical bearing; 513. Discharge hole; 52. Lower turntable; 521. Drive shaft; 522. Slot; 523. Curved table; 53. Proportioning tank; 531. Rotating drum; 532. Fixed drum; 54. Upper turntable; 541. Ring groove 2; 542. Transmission folding rod; 55. Fixed inclined table; 61. Motor 1; 611. Sprocket 1; 62. Drive shaft; 621. Spline groove; 622. Connecting table; 623. Sprocket 2; 63. Transmission table; 631. Spline shaft; 632. Insert table; 64. Chain; 65. Spring; 71. Mixing box; 72. Agitator; 73. Feed trough; 74. Valve; 81. Cylinder; 82. Limiting slider; 91. Conveying channel; 92. Motor 2; 93. Spiral column. DETAILED DESCRIPTION

[0035] The present invention will be described in further detail below with reference to the accompanying drawings.

[0036] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 6 As shown, a self-priming plastic particle feeding device includes a silo 1, a conveying pipe 2, a negative pressure mechanism 3, a mixing silo 4 and an extruder 9. The negative pressure mechanism 3 forms a negative pressure in the two conveying pipes 2, and respectively conveys the plastic particles and masterbatches in the two silos 1 to the mixing silo 4 through the two conveying pipes 2 for mixing. A proportioning mechanism 5, a driving mechanism 6 and a mixing mechanism 7 are provided in the mixing silo 4. The proportioning mechanism 5 includes a plurality of proportioning tanks 53. The driving mechanism 6 drives the plurality of proportioning tanks 53 to rotate, alternately passing under the two vertical pipes 23. The proportioned materials fall into the mixing mechanism 7 for mixing, and the mixed materials are conveyed to the extruder 9.

[0037] Combined with attachment Figure 1 , Attachment Figure 3 , Attachment Figure 4 and attached Figure 5 As shown, the conveying pipe 2 includes a feed pipe 21, a distribution pipe 22 and a vertical pipe 23. The two ends of the distribution pipe 22 are connected to the feed pipe 21 and the vertical pipe 23 respectively. The feed pipe 21 is connected to the bottom of the silo 1. The negative pressure mechanism 3 includes a negative pressure bin 31, a negative pressure pipe 32 and a filter bag 33. One end of the negative pressure pipe 32 extends into the negative pressure bin 31 and is connected to the filter bag 33, and the other end extends into the distribution pipe 22. A filter cone net 34 is provided at the end. The distribution pipe 22 is inclined upward and connected to the top of the vertical pipe 23. The diameter of the distribution pipe 22 is larger than that of the feed pipe 21. A collecting pipe 24 is provided on each of the two distribution pipes 22, and the bottom of the collecting pipe 24 is connected to the waste box.

[0038] The self-priming plastic granule feeding device mainly solves the problems of blockage, uneven mixing and insufficient ratio accuracy during the transportation of plastic granules and masterbatches. Through reasonable structural design, it realizes efficient transportation, accurate ratio and sufficient mixing of materials.

[0039] During operation, the negative pressure mechanism 3 is started, and the negative pressure bin 31 is formed by the negative pressure formed by the air pump, so that the negative pressure pipe 32 forms a negative pressure in the distribution pipe 22. Under the action of the negative pressure, the plastic particles and masterbatch at the bottom of the silo 1 enter the corresponding distribution pipe 22 through the feed pipe 21 respectively. The upward inclined distribution pipe 22 design helps the material to be transported obliquely upward under the push of the airflow. The filter cone net 34 at the end of the negative pressure pipe 32 can prevent the material from entering the negative pressure system and causing blockage, and allows the dust in the plastic particles and masterbatch to enter the negative pressure pipe 32 and enter the filter bag 33 along the negative pressure pipe 32 for collection.

[0040] Since the diameter of the distribution pipe 22 is larger than the feed pipe 21, the air flow velocity at the feed pipe 21 is greater than the air flow velocity at the distribution pipe 22, which is conducive to the feed pipe 21 to suck the material at the bottom of the silo 1. After the granular material enters the distribution pipe 22, the air flow velocity in the distribution pipe 22 decreases and under the action of gravity, the conveying speed of the granular material decreases. The large bonded particles and normal particle size in the plastic particles and masterbatch have different initial velocities when entering the distribution pipe 22. The initial velocity of the large bonded particles is smaller. During the oblique upward movement, the speed gradually decreases until they fall along the distribution pipe 22. The large bonded particles are collected into the waste box from the collection pipe 24 on the distribution pipe 22, while the normal particle size particles will move obliquely upward into the vertical pipe 23 due to their large initial velocity, and fall into the proportioning mechanism 5 along the vertical pipe 23, thereby realizing the automatic separation of dust and large particles during the conveying process of the granular material.

[0041] After the material enters the vertical pipe 23 through the distribution pipe 22, it falls into the proportioning mechanism 5 in the mixing bin 4. The driving mechanism 6 drives multiple proportioning tanks 53 to rotate, so that the proportioning tanks 53 pass alternately under the two vertical pipes 23, thereby accurately taking over different materials and completing the proportioning. The proportioned material falls into the mixing mechanism 7 for sufficient mixing, and finally the evenly mixed material is transported to the extruder 9 for subsequent processing. The whole process realizes the automation and efficient operation of materials from transportation to proportioning to mixing, effectively ensuring the accuracy and efficiency of material processing.

[0042] Combined with attachment Figure 1 As shown, the proportioning mechanism 5 also includes a fixed platform 51, a lower turntable 52, an upper turntable 54 and a fixed inclined platform 55. The fixed platform 51 and the fixed inclined platform 55 are fixedly arranged in the mixing bin 4. The driving mechanism 6 drives the lower turntable 52 and the upper turntable 54 to rotate in the fixed platform 51 and the fixed inclined platform 55 respectively. A plurality of proportioning tanks 53 are evenly arranged between the lower turntable 52 and the upper turntable 54.

[0043] Combined with attachment Figure 1 , Attachment Figure 2 and attached Figure 6 As shown, the proportioning tank 53 includes a rotating drum 531 and a fixed drum 532. The vertical section at the bottom of the rotating drum 531 and the top of the fixed drum 532 are slidably matched. The fixed inclined platform 55 is inclined with the upper turntable 54. The top inclined section of the rotating drum 531 is rotatably matched with the through hole on the upper turntable 54. The fixed drum 532 is fixedly installed in the through hole of the lower turntable 52. The lower turntable 52 and the upper turntable 54 are transmission connected.

[0044] Combined with attachment Figure 7 and attached Figure 8 As shown, the fixed platform 51 and the upper turntable 54 are respectively provided with an annular groove 1 511 and an annular groove 2 541 on the top, the bottom of the vertical pipe 23 passes through the through hole on the fixed inclined platform 55 and extends into the annular groove 2 541, the bottom of the fixed cylinder 532 extends into the annular groove 1 511, and the annular groove 1 511 is provided with a discharge hole 513. The bottom of the vertical pipe 23 for conveying plastic particles is at the lowest position of the annular groove 2 541, and the height of the point on the annular groove 2 541 corresponding to the axis of the vertical pipe 23 for conveying masterbatch is level with the height of the point on the annular groove 2 541 corresponding to the discharge hole 513.

[0045] The proportioning mechanism 5 mainly solves the problems of insufficient proportioning accuracy of plastic particles and masterbatch before mixing, difficulty in accurately matching different materials according to the set proportion, and the relatively complex structure required to achieve accurate proportioning. Through reasonable structural design, efficient material transportation and accurate automatic proportioning are achieved.

[0046] During operation, the material falls into the proportioning mechanism 5 in the mixing bin 4 through the vertical pipe 23. At this time, the driving mechanism 6 drives the lower turntable 52 and the upper turntable 54 to rotate in the fixed platform 51 and the fixed inclined platform 55 respectively. Since the lower turntable 52 is transmission-connected to the upper turntable 54, a plurality of proportioning tanks 53 evenly arranged therebetween rotate accordingly. During the rotation process, the proportioning tank 53 passes in turn under the vertical pipe 23 for conveying plastic particles, under the vertical pipe 23 for conveying masterbatch, and above the discharge hole 513, so that after the plastic particles and masterbatch fall into the proportioning tank 53 in turn, the proportioning tank 53 discharges the material through the discharge hole 513.

[0047] In order to achieve accurate proportioning and simplify the structure, the upper turntable 54 is designed to rotate tilted, and the proportioning tank 53 is designed to be split. The fixed cylinder 532 rotates with the lower turntable 52, and the rotating cylinder 531 rotates with the upper turntable 54 and has fluctuations in height. Due to the sliding fit between the vertical section at the bottom of the rotating cylinder 531 and the top of the fixed cylinder 532, when the rotating cylinder 531 rotates with the upper turntable 54, the upper turntable 54 has a rotating action relative to the upper turntable 54, as shown in the attached figure. Figure 8 In the figure, the lowest position of the annular groove 541 is point a, the position of the annular groove 541 below the vertical pipe 23 for conveying the masterbatch is point b, and the position of the annular groove 541 above the discharge hole 513 is point c. In the process of the rotating drum 531 reaching the highest point after passing through point a and point b and then moving to point c, the height of the top of the rotating drum 531 changes from high to low, and at points b and c, the top height of the rotating drum 531 is the same. Since the rotating drum 531 fluctuates up and down while the fixed drum 532 does not move up and down, the internal storage space of the proportioning tank 53 increases as the rotating drum 531 rises and decreases as the rotating drum 531 falls. The internal storage space of the proportioning tank 53 is the smallest at point a, and the storage space is the same at points b and c.

[0048] When the proportioning tank 53 rotates to the point a below the riser 23 for conveying plastic particles, the plastic particles enter the proportioning tank 53 through the bottom of the riser 23 and fill the storage space. As the proportioning tank 53 moves, the riser 23 will scrape the material on the top of the proportioning tank 53 flat. When it reaches the point b below the riser 23 for conveying masterbatch, the storage space of the proportioning tank 53 increases, and the masterbatch falls into the proportioning tank 53 through the corresponding riser 23 and fills it. When the proportioning tank 53 moves to the point c above the discharge hole 513, the internal storage space of the proportioning tank 53 first increases and then decreases during this process, and the front and rear spaces remain unchanged, so that the material will not overflow. The material falls into the mixing mechanism 7 through the discharge hole 513. The whole process realizes the automation and efficient operation of materials from conveying to proportioning, effectively ensuring the accuracy and efficiency of material processing.

[0049] The inclination angles of the upper turntable 54 and the fixed inclined platform 55 can be adjusted to control the changes in the storage space of the proportioning tank 53, and then adjust the ratio of plastic particles and masterbatch. The example in the attached figure shows the three necessary points in material transportation, and multiple points can be added to input other ingredients.

[0050] Combined with attachment Figure 1 , Attachment Figure 9 , Attachment Figure 11 and attached Figure 12 As shown, the driving mechanism 6 includes a motor 61, a driving shaft 62 and a transmission platform 63. The driving shaft 62 is rotatably arranged in the mixing chamber 4. A sprocket 611 is provided at the output end of the motor 61, and a sprocket 623 is provided on the outside of the driving shaft 62. The sprocket 611 and the sprocket 623 are connected to each other through a chain 64. The driving shaft 62 drives the lower turntable 52 to rotate through the transmission platform 63. The mixing mechanism 7 includes a mixing box 71 and an agitator 72 rotating in the mixing box 71. A connecting platform 622 is provided at the bottom of the driving shaft 62, and the connecting platform 622 is connected to the top of the agitator 72.

[0051] Combined with attachment Figure 10 and attached Figure 11 As shown, a spline shaft 631 is provided at the bottom of the transmission platform 63, a spline groove 621 is provided on the top of the driving shaft 62 to cooperate with the spline shaft 631, a spring 65 connected to the driving shaft 62 is provided at the inner through hole of the spline shaft 631, a plurality of inserts 632 are provided on the top of the transmission platform 63, a transmission shaft 521 is provided at the axis center of the lower turntable 52, and a plurality of slots 522 are provided at the bottom of the transmission shaft 521 to cooperate with the inserts 632, and the sides of the inserts 632 and the slots 522 are both inclined.

[0052] Combined with attachment Figure 7 As shown, a transmission folding rod 542 is provided in the multiple through holes on the axis side of the upper turntable 54, the top inclined section of the transmission folding rod 542 rotates and slides with the through hole of the upper turntable 54, the vertical section at the bottom of the transmission folding rod 542 rotates and slides with the through hole on the top side of the transmission shaft 521, and a tapered bearing 512 is provided on the fixed platform 51 to cooperate with the bottom of the lower turntable 52.

[0053] Combined with attachment Figure 10 As shown, an arc-shaped platform 523 is provided on the side of the lower turntable 52, and a limiting mechanism 8 is provided on the mixing bin 4. The limiting mechanism 8 includes a cylinder 81 and a limiting slider 82. The cylinder 81 pushes the limiting slider 82 to slide in the through hole of the mixing bin 4, and the end of the limiting slider 82 is limitedly matched with the raised plane of the arc-shaped platform 523.

[0054] The driving mechanism 6 mainly solves the stability and synchronization problems of power transmission between the proportioning mechanism 5 and the mixing mechanism 7, ensures the stable rotation of the lower turntable 52 to achieve accurate proportioning, and at the same time drives the agitator 72 to operate efficiently to complete material mixing.

[0055] During operation, the motor 61 runs, and the sprocket 1 611 at the output end drives the sprocket 2 623 on the outside of the drive shaft 62 to rotate through the chain 64, thereby causing the drive shaft 62 to rotate in the mixing bin 4. When the drive shaft 62 rotates, the spline groove 621 on the top cooperates with the spline shaft 631 at the bottom of the transmission platform 63 to ensure that the transmission platform 63 rotates synchronously with the drive shaft 62. The transmission platform 63 drives the lower turntable 52 to rotate, and the connecting platform 622 at the bottom of the drive shaft 62 rotates with the agitator 72 to respectively realize the displacement of the proportioning tank 53 and the mixing of the materials. Through such a structural design, the driving mechanism 6 realizes a single power source to simultaneously drive the proportioning mechanism 5 and the mixing mechanism 7, ensuring the synchronization of the operation of the two and improving the working efficiency and stability of the overall device.

[0056] The insert 632 on the top of the transmission platform 63 is inserted into the slot 522 at the bottom of the transmission shaft 521 of the lower turntable 52, thereby driving the lower turntable 52 to rotate on the fixed platform 51; the proportioning tank 53 needs to be detained at different points, and the cylinder 81 pushes the limit slider 82 to slide in the through hole of the mixing bin 4. When the lower turntable 52 rotates, the arc platform 523 rotates to the position of the limit slider 82, and is blocked by the limit slider 82, causing the lower turntable 52 to stop rotating. At this time, multiple proportioning tanks 53 are respectively at points a, b and c, and the detention time is convenient for the material to enter the proportioning tank 53.

[0057] When the lower turntable 52 stops rotating, the driving shaft 62 does not stop and still drives the agitator 72 to perform the stirring operation. At this time, the transmission platform 63 still rotates with the driving shaft 62. The torsional force of the driving shaft 62 will cause the insert 632 and the inclined surface of the slot 522 to slide, causing the insert 632 to disengage from the slot 522 and compress the spring 65 to realize the power separation of the transmission platform 63 and the lower turntable 52. In the subsequent process, under the pushing action of the spring 65, the insert 632 collides with the slot 522, thereby causing the lower turntable 52 to vibrate. The vibration will be transmitted to the fixed cylinder 532, thereby compacting the material in the proportioning tank 53 and reducing the gap between the granular materials to meet the precise proportioning requirements. After the limit mechanism 8 releases the limit, the spring 65 pushes the transmission platform 63 to move up, and the insert 632 is reinserted into the slot 522, driving the lower turntable 52 to rotate.

[0058] The rotation of the lower turntable 52 can be driven by the proportioning tank 53 to drive the upper turntable 54, but the proportioning tank 53 will be deformed due to the torque, affecting the sliding action between the rotating cylinder 531 and the fixed cylinder 532. In order to avoid this situation, a transmission folding rod 542 is added to transmit power. During the transmission process, the two ends of the transmission folding rod 542 respectively rotate and slide with the side through holes of the axis of the upper turntable 54 and the side through holes on the top of the transmission shaft 521.

[0059] Combined with attachment Figure 1As shown, a feed trough 73 connected to the discharge hole 513 is provided on the top of the mixing box 71, and the extruder 9 includes a conveying channel 91, a second motor 92 and a spiral column 93. The second motor 92 drives the spiral column 93 to rotate in the conveying channel 91. The bottom of the mixing box 71 is connected to the conveying channel 91, and a valve 74 is provided at the connecting pipeline.

[0060] The mixing mechanism 7 and the extruder 9 mainly solve the problems of insufficient mixing of materials after proportioning and unstable delivery of the mixed materials to the extrusion equipment, and realize efficient mixing and stable delivery of materials through reasonable structural design.

[0061] When the proportioning mechanism 5 completes the material proportioning, the material falls into the feed trough 73 at the top of the mixing mechanism 7 through the discharge hole 513, and then enters the mixing box 71. At this time, driven by the driving mechanism 6, the agitator 72 continues to rotate in the mixing box 71, fully stirring and mixing the incoming materials to ensure that the materials of different components are evenly blended. After the material mixing is completed, the valve 74 at the bottom of the mixing box 71 and the pipeline connecting the conveying channel 91 is opened, and the mixed materials enter the conveying channel 91 under the action of gravity. The motor 2 92 of the extruder 9 is started, driving the spiral column 93 to rotate in the conveying channel 91. The rotation of the spiral column 93 pushes the material forward along the conveying channel 91, realizing the stable conveying of the material to the subsequent processing links. The whole process ensures the consistency and stability of the material from mixing to conveying, providing reliable quality raw materials for subsequent production.

[0062] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs structures and embodiments similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A self-priming plastic granule feeding device, comprising a silo (1), a conveying pipe (2), a mixing silo (4) and an extruder (9), wherein the two conveying pipes (2) respectively convey the plastic granules and masterbatch in the two silos (1) to the mixing silo (4) for mixing, and the mixed materials are conveyed to the extruder (9), which is characterized by: The conveying pipe (2) includes a feed pipe (21), a distribution pipe (22) and a vertical pipe (23); both ends of the distribution pipe (22) are respectively connected to the feed pipe (21) and the vertical pipe (23); and the feed pipe (21) is connected to the bottom of the silo (1); The negative pressure device further comprises a negative pressure mechanism (3), the negative pressure mechanism (3) comprising a negative pressure bin (31), a negative pressure pipe (32) and a filter bag (33), one end of the negative pressure pipe (32) extending into the negative pressure bin (31) and connected to the filter bag (33), and the other end extending into the distribution pipe (22), and having a filter cone net (34) at the end thereof; A proportioning mechanism (5), a driving mechanism (6) and a mixing mechanism (7) are provided in the mixing bin (4). The proportioning mechanism (5) includes a plurality of proportioning tanks (53). The driving mechanism (6) drives the plurality of proportioning tanks (53) to rotate and alternately pass under the two vertical pipes (23). After proportioning, the materials fall into the mixing mechanism (7) for mixing. The proportioning mechanism (5) further comprises a fixed platform (51), a lower turntable (52), an upper turntable (54) and a fixed inclined platform (55); the fixed platform (51) and the fixed inclined platform (55) are fixedly arranged in the mixing bin (4); the driving mechanism (6) drives the lower turntable (52) and the upper turntable (54) to rotate in the fixed platform (51) and the fixed inclined platform (55), respectively; and a plurality of proportioning tanks (53) are evenly arranged between the lower turntable (52) and the upper turntable (54); The proportioning tank (53) includes a rotating drum (531) and a fixed drum (532), the vertical section at the bottom of the rotating drum (531) and the top of the fixed drum (532) are slidably matched, the fixed inclined platform (55) and the upper turntable (54) are inclined, the top inclined section of the rotating drum (531) is rotatably matched with the through hole on the upper turntable (54), the fixed drum (532) is fixedly installed in the through hole of the lower turntable (52), and the lower turntable (52) and the upper turntable (54) are transmission-connected.

2. A self-priming plastic particle feeding device according to claim 1, characterized in that: The distribution pipe (22) is inclined upward and communicated with the top of the vertical pipe (23). The diameter of the distribution pipe (22) is larger than that of the feed pipe (21). Both distribution pipes (22) are provided with a collection pipe (24), and the bottom of the collection pipe (24) is connected to the waste box.

3. The self-priming plastic particle feeding device according to claim 1, characterized in that: The fixed platform (51) and the upper turntable (54) are respectively provided with an annular groove 1 (511) and an annular groove 2 (541). The bottom of the vertical pipe (23) passes through the through hole on the fixed inclined platform (55) and extends into the annular groove 2 (541). The bottom of the fixed cylinder (532) extends into the annular groove 1 (511). The annular groove 1 (511) is provided with a discharge hole (513). The bottom of the vertical pipe (23) for conveying plastic particles is at the lowest position of the annular groove 2 (541). The height of the annular groove 2 (541) point corresponding to the axis of the vertical pipe (23) for conveying masterbatch is level with the height of the annular groove 2 (541) point corresponding to the discharge hole (513).

4. The self-priming plastic particle feeding device according to claim 1, characterized in that: The driving mechanism (6) includes a motor (61), a driving shaft (62) and a transmission platform (63). The motor (61) drives the driving shaft (62) to rotate in the mixing chamber (4). The driving shaft (62) drives the lower turntable (52) to rotate through the transmission platform (63). The mixing mechanism (7) includes a mixing box (71) and an agitator (72). The driving shaft (62) drives the agitator (72) to rotate in the mixing box (71).

5. The self-priming plastic particle feeding device according to claim 4, characterized in that: The transmission platform (63) is provided with a spline shaft (631) at the bottom, the driving shaft (62) is provided with a spline groove (621) that matches the spline shaft (631) at the top, a spring (65) connected to the driving shaft (62) is provided at the inner through hole of the spline shaft (631), a plurality of inserting platforms (632) are provided at the top of the transmission platform (63), a transmission shaft (521) is provided at the axis center of the lower turntable (52), and a plurality of slots (522) that match the inserting platforms (632) are provided at the bottom of the transmission shaft (521).

6. The self-priming plastic particle feeding device according to claim 5, characterized in that: An arc-shaped platform (523) is provided on the side of the lower turntable (52), and a limiting mechanism (8) is provided on the mixing bin (4). The limiting mechanism (8) includes a cylinder (81) and a limiting slider (82). The cylinder (81) pushes the limiting slider (82) to slide in the through hole of the mixing bin (4), and the end of the limiting slider (82) is limitedly engaged with the raised plane of the arc-shaped platform (523).

7. The self-priming plastic particle feeding device according to claim 5, characterized in that: A transmission folding rod (542) is provided in each of the plurality of through holes on the axis side of the upper turntable (54), the top inclined section of the transmission folding rod (542) rotates and slides with the through hole of the upper turntable (54), and the bottom vertical section of the transmission folding rod (542) rotates and slides with the through hole on the top side of the transmission shaft (521).

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