A screening device for PBT production

Abstract

The present invention relates to the technical field of PBT production, and discloses a screening device for PBT production, comprising a collision-type vibration mechanism, a plurality of vortex screening mechanisms and an elastic connection mechanism. The screening device for PBT production utilizes the vibration phenomenon generated by metal during collision, so that PBT plastic presents a vortex downward movement in a vortex housing under vibration and its own gravity, and screening is achieved according to its own size during the vortex downward movement. The vibration is generated by lateral collision, so the PBT plastic will not be separated from the vortex housing, thereby effectively improving the effective screening time of the PBT plastic in the vortex housing, thereby improving the screening efficiency. In addition, since the vortex housing is in a vortex state, the screening stroke of the PBT plastic in a unit volume can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of PBT production, in particular to a material screening device for PBT production. Background Art

[0002] PBT plastic is a milky white translucent plastic that can maintain stable insulation even under humid or high temperature conditions. It is widely used in the electronics manufacturing industry. During the extrusion process, a large amount of dust and impurities will adhere to the surface of PBT plastic. In order to improve the production cleanliness of PBT plastic, it is necessary to remove the impurities, thereby improving the production quality of PBT plastic.

[0003] For example, a Chinese patent with publication number "CN116118041B" discloses "a screening device for PBT production", whose main structure includes a coarse screen component, a rotary vibrating screen component, a quantitative component and a cleaning component. The right support plate and the left support plate are moved by gravity squeezing, and the right support plate and the left support plate are automatically reversed by the cooperation between gears to complete the control of PBT particle feeding. The top shaft is lifted one by one by the push block, driving the rotary vibrating screen to form a vortex vibration, thereby controlling the PBT particles on the rotary vibrating screen for screening. The intermittent moving frame is rotated by the blower, and the PBT particles are intermittently blown to collide with each other or with the inner wall of the outer moving wall, so that the dust on the surface falls off, thereby achieving the effect of cleaning the dust.

[0004] In actual work, its vibration relies on the push blocks to lift the top shafts one by one, driving the rotary vibrating screen to form vortex vibration. This vibration will cause the rotary vibrating screen to move up and down as a whole. That is, the vibration formed in this way will cause serious shaking of the PBT plastic inside the rotary vibrating screen, forcing the PBT plastic to splash. This phenomenon will cause the PBT plastic to be thrown upward and then fall from the air, causing the PBT plastic to waste more time moving in the air during screening, resulting in slow screening efficiency. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a screening device for PBT production, which utilizes the vibration phenomenon generated by metal during collision, so that the PBT plastic moves downward in a vortex shell under the vibration and its own gravity, and is screened according to its own size during the downward movement of the vortex. The vibration is generated by a lateral collision, so the PBT plastic will not be separated from the vortex shell, thereby effectively increasing the effective screening time of the PBT plastic in the vortex shell, thereby improving the screening efficiency. In addition, since the vortex shell is in a vortex state, the screening stroke of the PBT plastic per unit volume can be effectively increased, thereby solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a screening device for PBT production, comprising a driving motor fixedly installed inside a driving motor mounting shell, and also comprising a collision-type vibration mechanism, wherein a No. 1 longitudinal shell located directly above the driving motor, a plurality of longitudinal metal columns installed on the No. 1 longitudinal shell and capable of rotating, and an elastic metal plate that rotates with the rotor of the driving motor and can collide with the longitudinal metal columns during rotation to produce a vibration effect; a plurality of vortex screening mechanisms, wherein a vortex shell fixedly installed on the periphery of the No. 1 longitudinal shell and having a vortex-shaped structure and a vortex screening port arranged inside the vortex shell and capable of screening according to the size of PBT plastic are arranged inside; and an elastic connecting mechanism, wherein a lower longitudinal hollow cylinder capable of fixing the driving motor mounting shell inside is arranged inside, an upper longitudinal hollow cylinder ball-hinged inside the lower longitudinal hollow cylinder and fixedly installed at the bottom of the No. 1 longitudinal shell, and a plurality of spiral springs installed on the periphery of the lower longitudinal hollow cylinder and the upper longitudinal hollow cylinder and capable of causing the two to produce an angle reset phenomenon.

[0007] Preferably, the collision-type vibration mechanism includes a No. 1 longitudinal shell, a No. 1 fixed plate structure of an integrated structure is arranged at the bottom of the No. 1 longitudinal shell, a No. 1 longitudinal component active cavity is arranged inside the No. 1 longitudinal shell, a No. 1 component mounting hole connected to the bottom end of the No. 1 longitudinal component active cavity is arranged at the bottom end of the No. 1 longitudinal shell, a No. 1 component fixing groove is arranged at the top center of the No. 1 longitudinal component active cavity, a No. 1 longitudinal shell is provided with a No. 1 longitudinal rotation axis at the center of the No. 1 longitudinal component active cavity, and the No. 1 longitudinal rotation axis passes through the shaft body located inside the No. 1 component mounting hole and the No. 1 component fixing groove. Bearing installation, the bottom end of the No. 1 longitudinal rotating shaft is provided with a No. 2 fixed plate structure which is an integral structure therewith, the No. 1 longitudinal rotating shaft is provided with three annular array-type longitudinal embedded grooves at the shaft body located inside the movable cavity of the No. 1 longitudinal component, and an elastic metal plate is embedded inside each of the longitudinal embedded grooves, and the No. 1 longitudinal outer shell is provided with a plurality of upper and lower symmetrical shaft body fixing seats at the circumferential inner wall of the movable cavity of the No. 1 longitudinal component, a No. 2 longitudinal rotating shaft which can rotate is respectively installed between every two upper and lower symmetrical shaft body fixing seats through bearings, and a rotatable longitudinal metal column is fixedly installed between the two upper and lower symmetrical No. 2 longitudinal rotating shafts.

[0008] Preferably, the elastic metal plate is made of a metal material with elastic reset capability, and generates a resistance bending effect when colliding with the longitudinal metal column, and performs elastic reset after the collision.

[0009] Preferably, the maximum distance between the elastic metal plate and the first longitudinal rotation axis is the same as the distance between the axis center line of the longitudinal metal column and the axis center line of the first longitudinal rotation axis.

[0010] Preferably, the vortex screening mechanism includes a vortex shell, the inner vortex surface of the vortex shell is provided with a vortex fixing frame of an integral structure therewith, the center of the vortex fixing frame is provided with a vortex fixing groove fixedly mounted on the outer circumferential surface of the No. 1 longitudinal shell, the interior of the vortex shell is provided with an upper vortex flow groove with an upper vortex surface in an open state, the vortex shell is provided with a lower vortex flow groove at the bottom of the upper vortex flow groove, the vortex shell is provided with two oblique vortex plates between the upper vortex flow groove and the lower vortex flow groove, and the gap formed between the two oblique vortex plates constitutes a vortex screening port connecting the upper vortex flow groove and the lower vortex flow groove.

[0011] Preferably, the cross-sectional structure of the two oblique vortex plates is an inverted "eight"-shaped structure, the notch in the middle of the "eight"-shaped structure is the vortex screening opening, and the width of the vortex screening opening is the same as the target size of the PBT plastic particles during screening.

[0012] Preferably, the elastic connection mechanism includes a lower longitudinal hollow cylinder and an upper longitudinal hollow cylinder, the bottom of the lower longitudinal hollow cylinder is provided with a No. 3 fixing plate structure integral with the lower longitudinal hollow cylinder, the top of the upper longitudinal hollow cylinder is provided with a No. 4 fixing plate structure integral with the lower longitudinal hollow cylinder, the interior of the lower longitudinal hollow cylinder is provided with a component installation cavity for fixing and installing a drive motor mounting shell, the lower longitudinal hollow cylinder is provided with an outer hemispherical cavity at the top of the component installation cavity, the lower longitudinal hollow cylinder is provided with a rotatable hemispherical shell inside the outer hemispherical cavity, the bottom end of the upper longitudinal hollow cylinder is connected to the hemispherical shell The top of the outer shell is an integrated structure, and the interior of the hemispherical outer shell is provided with an inner hemispherical cavity with an open bottom end, and the center of the upper longitudinal hollow cylinder is provided with a No. 2 longitudinal component active cavity with a bottom end connected to the inner hemispherical cavity and a top end in an open state, and a plurality of annular array-type spiral springs are installed between the No. 3 fixed plate structure and the No. 4 fixed plate structure, and the upper end surface of the No. 4 fixed plate structure is fixedly connected to the bottom end of the No. 1 fixed plate structure, and the bottom shaft body of the No. 1 longitudinal rotating shaft passes through the No. 2 longitudinal component active cavity and the inner hemispherical cavity in sequence, and the No. 2 fixed plate structure is fixedly connected to the top of the rotor.

[0013] Preferably, the coil spring is in a compressed state, and the elastic strength of the coil spring is sufficient to keep the No. 1 longitudinal housing in an upright state when not in operation.

[0014] Preferably, it also includes a synchronous feeding mechanism, which is provided with a discharge channel inside which can enable the PBT plastic particles to be discharged synchronously into the interior of multiple upper vortex flow grooves when shaking.

[0015] Preferably, the synchronous feeding mechanism includes a No. 2 longitudinal shell, the bottom of the No. 2 longitudinal shell is provided with a No. 5 fixed plate structure which is an integral structure with the No. 2 longitudinal shell and fixedly mounted on the top of the No. 1 longitudinal shell, the interior of the No. 2 longitudinal shell is provided with a feeding cavity with an open top, the No. 2 longitudinal shell is provided with an upward conical protrusion structure located inside the feeding cavity, the outer circumferential surface of the No. 2 longitudinal shell is provided with a plurality of downwardly inclined discharge channels, each of the discharge channels is provided with a discharge hole connected to the periphery of the bottom of the feeding cavity, and the bottom end of each of the discharge holes points to directly above an upper vortex flow groove.

[0016] Compared with the prior art, the present invention provides a screening device for PBT production, which has the following beneficial effects:

[0017] 1. The vibration phenomenon generated by metal collision is utilized to make the PBT plastic move downward in a vortex under the vibration and its own gravity in the vortex housing, and screening is achieved according to its own size during the downward movement of the vortex. The vibration is generated by lateral collision, so the PBT plastic will not be separated from the vortex housing, thereby effectively increasing the effective screening time of the PBT plastic in the vortex housing, thereby improving the screening efficiency. In addition, since the vortex housing is in a vortex state, the screening stroke of the PBT plastic per unit volume can be effectively increased.

[0018] 2. By setting up a collision-type vibration mechanism, when the elastic metal plate collides with the longitudinal metal column, vibration will occur, thereby driving the No. 1 longitudinal shell to vibrate. During the continuous rotation process, collisions will continue to occur, thereby producing a continuous vibration effect. During the contact process between the elastic metal plate and the longitudinal metal column, the longitudinal metal column can rotate, thereby reducing the sliding friction between the two, so as to increase the working life of both.

[0019] 3. By setting up a vortex screening mechanism, the No. 1 longitudinal shell will drive the vortex shell to vibrate. At this time, the PBT plastic particles located inside the upper vortex flow groove will move downward along the inside under the action of vibration and gravity, thereby realizing the screening of PBT plastic particles of different sizes. After screening, the larger particles are discharged through the lower discharge port of the upper vortex flow groove, and the PBT plastic particles that meet the requirements are discharged through the lower discharge port of the lower vortex flow groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 is a three-dimensional cross-sectional view of the present invention;

[0022] Figure 3 It is a three-dimensional cross-sectional view of the collision type vibration mechanism in the present invention in the longitudinal direction;

[0023] Figure 4 It is a three-dimensional cross-sectional view of the collision type vibration mechanism in the present invention in a horizontal position;

[0024] Figure 5 It is a three-dimensional cross-sectional view of the vortex screening mechanism in the present invention;

[0025] Figure 6 is a three-dimensional diagram of the elastic connection mechanism of the present invention;

[0026] Figure 7 is a three-dimensional cross-sectional view of the elastic connection mechanism of the present invention;

[0027] Figure 8 It is a three-dimensional cross-sectional view of the synchronous feeding mechanism in the present invention.

[0028] Among them: 1. Drive motor mounting housing; 2. Drive motor; 3. Rotor; 4. Collision vibration mechanism; 41. No. 1 longitudinal housing; 42. No. 1 fixed plate structure; 43. No. 1 component mounting hole; 44. No. 1 component fixing groove; 45. No. 1 longitudinal component movable cavity; 46. Longitudinal embedded groove; 47. Elastic metal plate; 48. Shaft body fixing seat; 49. No. 2 longitudinal rotating shaft; 410. Longitudinal metal column; 411. No. 1 longitudinal rotating shaft; 412. No. 2 fixed plate structure; 5. Vortex screening mechanism; 51. Vortex housing; 52. Vortex fixing frame; 53. Vortex fixing groove; 54. Upper vortex Swirl flow groove; 55, oblique vortex plate; 56, vortex screening port; 57, lower vortex flow groove; 6, elastic connection mechanism; 61, No. 3 fixed plate structure; 62, lower longitudinal hollow cylinder; 63, outer hemispherical cavity; 64, hemispherical shell; 65, inner hemispherical cavity; 66, upper longitudinal hollow cylinder; 67, component installation cavity; 68, No. 2 longitudinal component movable cavity; 69, No. 4 fixed plate structure; 610, spiral spring; 7, synchronous feeding mechanism; 71, No. 2 longitudinal shell; 72, No. 5 fixed plate structure; 73, feeding cavity; 74, conical protrusion structure; 75, discharge channel; 76, discharge hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 8 A material screening device for PBT production includes a drive motor 2 fixedly installed inside a drive motor mounting housing 1, and the drive motor 2 needs to have the ability to control the rotation speed of its rotor 3.

[0031] To achieve percussive vibration effects, see Figure 1 , Figure 2 , Figure 3 and Figure 4 , it is necessary to set up a collision-type vibration mechanism 4, which is provided with a No. 1 longitudinal shell 41 located just above the driving motor 2, a plurality of longitudinal metal columns 410 installed on the No. 1 longitudinal shell 41 and capable of rotating, and an elastic metal plate 47 that rotates with the rotor 3 of the driving motor 2 and can collide with the longitudinal metal column 410 during rotation to produce a vibration effect. When the driving motor 2 is started, the rotor 3 will drive the No. 1 longitudinal rotating shaft 411 to rotate, thereby driving the plurality of elastic metal plates 47 to rotate. When the elastic metal plate 47 collides with the longitudinal metal column 410, vibration will occur, thereby driving the No. 1 longitudinal shell 41 to vibrate. At the same time, the elastic metal plate 47 is made of a metal material with elastic reset ability, and when it collides with the longitudinal metal column 410, a resistance bending effect will occur, and elastic reset will be performed after the collision. During the continuous rotation process, collisions will continue to occur, thereby producing a continuous vibration effect. During the contact process between the elastic metal plate 47 and the longitudinal metal column 410, the longitudinal metal column 410 can rotate, thereby reducing the sliding friction between the two, so as to improve the working life of both.

[0032] For the specific structure of the collision type vibration mechanism 4, please refer to Figure 3 and Figure 4, including a No. 1 longitudinal shell 41, a No. 1 fixing plate structure 42 of an integrated structure is arranged at the bottom of the No. 1 longitudinal shell 41, a No. 1 longitudinal component active cavity 45 is arranged inside the No. 1 longitudinal shell 41, a No. 1 component mounting hole 43 communicating with the bottom end of the No. 1 longitudinal component active cavity 45 is arranged at the bottom end of the No. 1 longitudinal shell 41, a No. 1 component fixing groove 44 is arranged at the top center of the No. 1 longitudinal component active cavity 45 of the No. 1 longitudinal shell 41, a No. 1 longitudinal rotating shaft 411 is arranged at the center of the No. 1 longitudinal component active cavity 45 of the No. 1 longitudinal shell 41, the No. 1 longitudinal rotating shaft 411 is installed through a bearing on the shaft body located inside the No. 1 component mounting hole 43 and the No. 1 component fixing groove 44, the No. 1 longitudinal rotating shaft 411 is arranged at the bottom end of the No. 1 longitudinal rotating shaft 411 with a No. 2 fixing plate structure 412 of an integrated structure therewith, the No. 1 longitudinal rotating shaft 411 is provided ... The longitudinal rotating shaft 411 is provided with three annular array-type longitudinal embedded grooves 46 at the shaft body located inside the movable cavity 45 of the No. 1 longitudinal component, and an elastic metal plate 47 is embedded inside each of the longitudinal embedded grooves 46. The No. 1 longitudinal outer shell 41 is installed with multiple upper and lower symmetrical shaft fixing seats 48 on the circumferential inner wall located in the movable cavity 45 of the No. 1 longitudinal component, and a rotatable No. 2 longitudinal rotating shaft 49 is respectively installed between every two upper and lower symmetrical shaft fixing seats 48 through bearings, and a rotatable longitudinal metal column 410 is fixedly installed between the two upper and lower symmetrical No. 2 longitudinal rotating shafts 49. In order to have the ability of component collision, it is necessary to make the maximum distance between the elastic metal plate 47 and the No. 1 longitudinal rotating shaft 411 the same as the distance between the axis center line of the longitudinal metal column 410 and the axis center line of the No. 1 longitudinal rotating shaft 411.

[0033] To achieve vortex screening function, please refer to Figure 1 , Figure 2 and Figure 5, it is necessary to set up a plurality of vortex screening mechanisms 5, wherein a vortex housing 51 fixedly mounted on the periphery of the first longitudinal housing 41 and having a vortex structure and a vortex screening port 56 arranged inside the vortex housing 51 and capable of screening according to the size of the PBT plastic are provided. The first longitudinal housing 41 will drive the vortex housing 51 to vibrate. At this time, the PBT plastic particles located inside the upper vortex flow groove 54 will move downward along the inside thereof under the action of vibration and gravity. During the movement, due to the two oblique vortex plates 5 5 is an inverted "eight"-shaped structure, and the gap in the middle of the "eight"-shaped structure is the vortex screening port 56, and the width of the vortex screening port 56 is the same as the target size of the PBT plastic particles during screening, which will make the PBT plastic particles that meet the size fall into the lower vortex flow groove 57, thereby realizing the screening of PBT plastic particles of different sizes. After screening, the larger particles are discharged through the lower discharge port of the upper vortex flow groove 54, and the PBT plastic particles that meet the requirements are discharged through the lower discharge port of the lower vortex flow groove 57.

[0034] For the specific structure of the vortex screening mechanism 5, please refer to Figure 5 , including a vortex shell 51, the inner vortex surface of the vortex shell 51 is provided with a vortex fixing frame 52 with an integral structure therewith, the center of the vortex fixing frame 52 is provided with a vortex fixing groove 53 fixedly installed on the outer circumferential surface of the first longitudinal shell 41, the interior of the vortex shell 51 is provided with an upper vortex flow groove 54 with an upper vortex surface in an open state, the vortex shell 51 is provided with a lower vortex flow groove 57 at the bottom of the upper vortex flow groove 54, the vortex shell 51 is provided with two oblique vortex plates 55 between the upper vortex flow groove 54 and the lower vortex flow groove 57, and the gap formed between the two oblique vortex plates 55 constitutes a vortex screening port 56 connecting the upper vortex flow groove 54 and the lower vortex flow groove 57.

[0035] In order to make the first longitudinal housing 41 always maintain an upright state on the basis of continuous vibration, please refer to Figure 1 , Figure 2 , Figure 6 and Figure 7, it is necessary to set up an elastic connecting mechanism 6, inside which is provided a lower longitudinal hollow cylinder 62 capable of fixing the driving motor mounting housing 1 inside, an upper longitudinal hollow cylinder 66 installed in a ball-hinged manner inside the lower longitudinal hollow cylinder 62 and fixedly installed at the bottom of the No. 1 longitudinal housing 41, and a plurality of coil springs 610 installed on the periphery of the lower longitudinal hollow cylinder 62 and the upper longitudinal hollow cylinder 66 and capable of causing the two to produce an angle reset phenomenon. During the vibration of the No. 1 longitudinal housing 41, the hemispherical housing 64 will undergo an adaptive angle change, thereby not destroying the vibration effect of the No. 1 longitudinal housing 41. At the same time, after a single vibration is completed, since the coil spring 610 is in a compressed state and the elastic strength of the coil spring 610 is sufficient to make the No. 1 longitudinal housing 41 in an upright state when not working, the coil spring 610 can promptly make the No. 1 longitudinal housing 41 in an upright state to ensure the next vibration.

[0036] For the specific structure of the elastic connection mechanism 6, please refer to Figure 6 and Figure 7 , including a lower longitudinal hollow cylinder 62 and an upper longitudinal hollow cylinder 66, the bottom of the lower longitudinal hollow cylinder 62 is provided with a No. 3 fixing plate structure 61 of an integral structure therewith, the top of the upper longitudinal hollow cylinder 66 is provided with a No. 4 fixing plate structure 69 of an integral structure therewith, the interior of the lower longitudinal hollow cylinder 62 is provided with a component installation cavity 67 for fixing and installing the drive motor mounting housing 1, the lower longitudinal hollow cylinder 62 is provided with an outer hemispherical cavity 63 at the top of the component installation cavity 67, the lower longitudinal hollow cylinder 62 is provided with a rotatable hemispherical shell 64 inside the outer hemispherical cavity 63, the bottom end of the upper longitudinal hollow cylinder 66 is connected to the top of the hemispherical shell 64 It is an integrated structure, the interior of the hemispherical shell 64 is provided with an inner hemispherical cavity 65 with an open bottom end, the center of the upper longitudinal hollow cylinder 66 is provided with a No. 2 longitudinal component active cavity 68 with a bottom end connected to the inner hemispherical cavity 65 and a top end being open, a plurality of annular array-type coil springs 610 are installed between the No. 3 fixed plate structure 61 and the No. 4 fixed plate structure 69, the upper end face of the No. 4 fixed plate structure 69 is fixedly connected to the bottom end of the No. 1 fixed plate structure 42, the bottom shaft body of the No. 1 longitudinal rotating shaft 411 passes through the No. 2 longitudinal component active cavity 68 and the inner hemispherical cavity 65 in sequence, and the No. 2 fixed plate structure 412 is fixedly connected to the top of the rotor 3.

[0037] In order to achieve synchronous discharge of PBT plastic granules, please refer to Figure 1 , Figure 2 and Figure 8, it is necessary to set up a synchronous feeding mechanism 7, which is provided with a discharge channel 75 inside which can make the PBT plastic particles be discharged synchronously into the interior of multiple upper vortex flow grooves 54 when shaking, and the PBT plastic particles are put into the interior of the feeding chamber 73. Due to the vibration of the No. 1 longitudinal shell 41, the PBT plastic particles located in the feeding chamber 73 will also be vibrated. The PBT plastic particles are guided by the conical protrusion structure 74 and pass through each discharge hole 76 to be synchronously discharged into different upper vortex flow grooves 54, thereby realizing the synchronous discharge of the PBT plastic particles.

[0038] For the specific structure of the synchronous feeding mechanism 7, please refer to Figure 8 , including a No. 2 longitudinal shell 71, the bottom of the No. 2 longitudinal shell 71 is provided with a No. 5 fixed plate structure 72 which is an integral structure with it and fixedly installed on the top of the No. 1 longitudinal shell 41, the interior of the No. 2 longitudinal shell 71 is provided with a feeding chamber 73 with an open top, the No. 2 longitudinal shell 71 is provided with an upward conical protrusion structure 74 inside the feeding chamber 73, the outer circumferential surface of the No. 2 longitudinal shell 71 is provided with a plurality of downwardly inclined discharge channels 75, each of the discharge channels 75 is provided with a discharge hole 76 connected to the outer periphery of the bottom of the feeding chamber 73, and the bottom end of each of the discharge holes 76 points to the top of an upper vortex flow groove 54 respectively.

[0039] The specific working principle of the present invention is that when the driving motor 2 is started, the rotor 3 drives the first longitudinal rotating shaft 411 to rotate, and then drives the multiple elastic metal plates 47 to rotate. When the elastic metal plate 47 collides with the longitudinal metal column 410, vibration will occur, thereby driving the first longitudinal housing 41 to vibrate. At the same time, the elastic metal plate 47 is made of a metal material with elastic reset ability, and when it collides with the longitudinal metal column 410, it will resist and bend, and elastically reset after the collision. In the continuous rotation process, collisions will continue to occur, thereby generating a continuous vibration effect;

[0040] The PBT plastic particles are put into the feeding chamber 73. Due to the vibration of the first longitudinal housing 41, the PBT plastic particles in the feeding chamber 73 also vibrate. The PBT plastic particles are guided by the conical protrusion structure 74 and pass through the discharge holes 76 to be discharged synchronously into different upper vortex flow grooves 54.

[0041] The No. 1 longitudinal shell 41 will drive the vortex shell 51 to vibrate. At this time, the PBT plastic particles located inside the upper vortex flow groove 54 will move downward along its interior under the action of vibration and gravity, causing the PBT plastic particles that meet the size to fall into the lower vortex flow groove 57, thereby realizing the screening of PBT plastic particles of different sizes. After screening, the larger particles are discharged through the lower discharge port of the upper vortex flow groove 54, while the PBT plastic particles that meet the requirements are discharged through the lower discharge port of the lower vortex flow groove 57.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A material screening device for PBT production, comprising a drive motor (2) fixedly mounted inside a drive motor mounting housing (1), characterized in that: Also includes, A collision-type vibration mechanism (4), wherein a first longitudinal housing (41) located directly above the drive motor (2) is provided inside the mechanism, a plurality of longitudinal metal columns (410) mounted on the first longitudinal housing (41) and capable of rotating, and an elastic metal plate (47) that rotates with the rotor (3) of the drive motor (2) and can collide with the longitudinal metal columns (410) during rotation to generate a vibration effect; A plurality of vortex screening mechanisms (5), each of which has a vortex housing (51) fixedly mounted on the periphery of the first longitudinal housing (41) and having a vortex structure, and a vortex screening port (56) disposed inside the vortex housing (51) and capable of screening PBT plastic according to the size of the plastic; and an elastic connection mechanism (6), wherein a lower longitudinal hollow cylinder (62) capable of fixing the drive motor mounting housing (1) therein is provided, an upper longitudinal hollow cylinder (66) which is ball-jointedly mounted inside the lower longitudinal hollow cylinder (62) and fixedly mounted on the bottom of the first longitudinal housing (41), and a plurality of spiral springs (610) mounted on the peripheries of the lower longitudinal hollow cylinder (62) and the upper longitudinal hollow cylinder (66) and capable of causing the two to produce an angular reset phenomenon; The vortex screening mechanism (5) comprises a vortex housing (51), the inner vortex surface of the vortex housing (51) is provided with a vortex fixing frame (52) of an integral structure therewith, the center of the vortex fixing frame (52) is provided with a vortex fixing groove (53) fixedly mounted on the outer circumferential surface of the first longitudinal housing (41), the interior of the vortex housing (51) is provided with an upper vortex flow groove (54) whose upper vortex surface is in an open state, the vortex housing (51) is provided with a lower vortex flow groove (57) at the bottom of the upper vortex flow groove (54), the vortex housing (51) is provided with two oblique vortex plates (55) between the upper vortex flow groove (54) and the lower vortex flow groove (57), and the gap formed between the two oblique vortex plates (55) constitutes a vortex screening port (56) connecting the upper vortex flow groove (54) and the lower vortex flow groove (57); The collision-type vibration mechanism (4) comprises a No. 1 longitudinal shell (41), a No. 1 fixing plate structure (42) of an integrated structure is arranged at the bottom of the No. 1 longitudinal shell (41), a No. 1 longitudinal component movable cavity (45) is arranged inside the No. 1 longitudinal shell (41), a No. 1 component mounting hole (43) connected to the bottom end of the No. 1 longitudinal component movable cavity (45) is arranged at the bottom end of the No. 1 longitudinal shell (41), a No. 1 component fixing groove (44) is arranged at the top center of the No. 1 longitudinal component movable cavity (45), the No. 1 longitudinal shell (41) is provided with a No. 1 longitudinal rotation axis (411) at the center of the No. 1 longitudinal component movable cavity (45), and the No. 1 longitudinal rotation axis (411) is arranged at the No. 1 component mounting hole (43) and the No. 1 component fixing groove (44). The shaft body is installed through a bearing, and a No. 2 fixed plate structure (412) having an integral structure therewith is provided at the bottom end of the No. 1 longitudinal rotating shaft (411), and the No. 1 longitudinal rotating shaft (411) is provided with three annular array-type longitudinal embedding grooves (46) at the shaft body located inside the No. 1 longitudinal component active cavity (45), and an elastic metal plate (47) is embedded inside each of the longitudinal embedding grooves (46), and the No. 1 longitudinal housing (41) is provided with a plurality of upper and lower symmetrical shaft body fixing seats (48) at the circumferential inner wall located in the No. 1 longitudinal component active cavity (45), and a No. 2 longitudinal rotating shaft (49) capable of rotation is respectively installed between every two upper and lower symmetrical shaft body fixing seats (48) through bearings, and a longitudinal metal column (410) capable of rotation is fixedly installed between the two upper and lower symmetrical No. 2 longitudinal rotating shafts (49); The elastic metal plate (47) is made of a metal material with elastic reset capability, and produces a resistance bending effect when colliding with the longitudinal metal column (410), and performs elastic reset after the collision.

2. A screening device for PBT production according to claim 1, characterized in that: The maximum distance between the elastic metal plate (47) and the first longitudinal rotation axis (411) is the same as the distance between the axis center line of the longitudinal metal column (410) and the axis center line of the first longitudinal rotation axis (411).

3. A screening device for PBT production according to claim 1, characterized in that: The cross-sectional structure of the two oblique vortex plates (55) is an inverted "eight"-shaped structure, the notch in the middle of the "eight"-shaped structure is the vortex screening opening (56), and the width of the vortex screening opening (56) is the same as the target size of the PBT plastic particles during screening.

4. A screening device for PBT production according to claim 1, characterized in that: The elastic connection mechanism (6) comprises a lower longitudinal hollow cylinder (62) and an upper longitudinal hollow cylinder (66); a third fixing plate structure (61) which is an integral structure with the lower longitudinal hollow cylinder (62) is arranged at the bottom of the lower longitudinal hollow cylinder (62); a fourth fixing plate structure (69) which is an integral structure with the upper longitudinal hollow cylinder (66) is arranged at the top of the upper longitudinal hollow cylinder (66); a component mounting cavity (67) for fixing and mounting a drive motor mounting housing (1) is arranged inside the lower longitudinal hollow cylinder (62); an outer hemispherical cavity (63) is arranged at the top of the component mounting cavity (67); a rotatable hemispherical housing (64) is installed inside the outer hemispherical cavity (63) of the lower longitudinal hollow cylinder (62); and a bottom end of the upper longitudinal hollow cylinder (66) is connected to the hemispherical housing. The top of (64) is an integrated structure, the interior of the hemispherical shell (64) is provided with an inner hemispherical cavity (65) with an open bottom end, the center of the upper longitudinal hollow cylinder (66) is provided with a second longitudinal component movable cavity (68) with a bottom end connected to the inner hemispherical cavity (65) and a top end in an open state, a plurality of annular array-type spiral springs (610) are installed between the third fixed plate structure (61) and the fourth fixed plate structure (69), the upper end surface of the fourth fixed plate structure (69) is fixedly connected to the bottom end of the first fixed plate structure (42), the bottom shaft body of the first longitudinal rotating shaft (411) passes through the second longitudinal component movable cavity (68) and the inner hemispherical cavity (65) in sequence, and the second fixed plate structure (412) is fixedly connected to the top of the rotor (3).

5. A material screening device for PBT production according to claim 4, characterized in that: The coil spring (610) is in a compressed state, and the elastic strength of the coil spring (610) is sufficient to keep the first longitudinal housing (41) in an upright state when not in operation.

6. A screening device for PBT production according to claim 1, characterized in that: It also comprises a synchronous feeding mechanism (7), which is provided with a discharge channel (75) inside which can enable the PBT plastic particles to be synchronously discharged into the interior of the plurality of upper vortex flow grooves (54) when shaking.

7. A screening device for PBT production according to claim 6, characterized in that: The synchronous feeding mechanism (7) comprises a second longitudinal shell (71), the bottom of the second longitudinal shell (71) is provided with a fifth fixed plate structure (72) which is an integral structure with the second longitudinal shell (71) and fixedly mounted on the top of the first longitudinal shell (41), the interior of the second longitudinal shell (71) is provided with a feeding cavity (73) with an open top, the interior of the second longitudinal shell (71) is provided with an upward conical protrusion structure (74) located inside the feeding cavity (73), the outer circumferential surface of the second longitudinal shell (71) is provided with a plurality of downwardly inclined discharge channels (75), each of the discharge channels (75) is provided with a discharge hole (76) communicating with the outer periphery of the bottom of the feeding cavity (73), and the bottom end of each of the discharge holes (76) points directly above an upper vortex flow groove (54).

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