CN219788929U

CN219788929U - Shaving and screening equipment for PA powder for rotational molding

Info

Publication number: CN219788929U
Application number: CN202320726869.9U
Authority: CN
Inventors: 徐虎
Original assignee: Jiangsu Naweijie Powder Technology Co ltd
Current assignee: Jiangsu Naweijie Powder Technology Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-10-03
Anticipated expiration: 2033-04-04

Abstract

The utility model discloses a scraping and screening device of PA powder for rotational molding, which comprises a vibrating shell, wherein the top of the vibrating shell is provided with a feed inlet, and the side wall of the vibrating shell is provided with a plurality of discharge holes; the fixed mount is connected with the vibration shell through the elastic connecting piece; the vibration source is arranged on the fixing frame, and the output end of the vibration source is connected with the vibration shell; the screen is distributed in the vibration shell along the vertical direction; the flat scraping assembly comprises a scraping rope and a driving unit, wherein the scraping rope is attached to the top surface of the screen, and the driving unit drives the scraping rope to circumferentially rotate. This scraping screening equipment of PA powder for rotational moulding passes through drive unit and drives the rope of scraping and rotate at the top surface of screen cloth, agitates the powder granule on the screen cloth, increases the loose degree of material on the screen cloth, sweeps away the large granule powder of blocking up on the screen cloth mesh simultaneously, avoids blocking up the mesh, has so improved the screening effect to powder granule, makes the quality that the even uniformity was kept in exhaust PA powder granule particle diameter in order to improve rotational moulding shaping product.

Description

Shaving and screening equipment for PA powder for rotational molding

Technical Field

The utility model relates to the technical field of powder vibrating screens, in particular to a scraping and screening device for PA powder for rotational molding.

Background

PA is polyamide, commonly called nylon, has excellent mechanical properties, is oil-resistant, wear-resistant, self-lubricating and corrosion-resistant, has better molding processability, and is usually used for processing products of different types by adopting a rotational molding process in industrial production.

In order to improve the quality of a product obtained by rotational molding of PA powder, a vibrating screen is generally used in the prior art to screen PA powder mixed in different particle size ranges so as to screen the PA powder out of the different particle size ranges. For example, chinese patent publication No. CN214347788U discloses a circular vibrating screen which can clean up the mesh rapidly and effectively, prevent the mesh from being blocked, and improve screening efficiency.

However, in the vibrating screen, the conical screen is not beneficial to material tiling, powder materials are easily accumulated at the lower position of the screen in the screening process, so that the loosening degree of the materials on the screen is poor, the screening efficiency is reduced, and part of the powder materials are discharged from the discharge pipe without screening through the mesh holes due to accumulation of the materials, so that the screening effect is poor, and further the rotational molding effect of PA powder is affected; in addition, the device is when using, and the clean mechanism that the rethread brush and scraper blade constitute is cleared up after the material sieves, and screening and the clearance of material distribute promptly go on, adopts this mode, because the screening in-process, the granule of big particle diameter keeps blocking up the mesh of screen cloth, only can break away from the mesh after the clearance, and then has led to the screening efficiency reduction of shale shaker, has prolonged device operating time.

Accordingly, there is a need for improvements in the prior art shakers.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a scraping and screening device for PA powder for rotational molding, which can improve screening efficiency and screening effect.

In order to achieve the technical effects, the technical scheme of the utility model is as follows: a doctor blading sifting apparatus for PA powder for rotomolding, comprising:

the vibrating shell is provided with an inner cavity, the top of the vibrating shell is provided with a feeding hole, the side wall of the vibrating shell is provided with a plurality of discharging holes, and the feeding hole and the discharging holes are communicated with the inner cavity;

the fixing frame is connected with the vibration shell through the elastic connecting piece;

the vibration source is arranged on the fixing frame, and the output end of the vibration source is connected with the vibration shell;

the screen meshes are distributed in the vibrating shell along the vertical direction so as to divide the screen meshes into screening cavities corresponding to the discharge holes one by one, and the mesh pore diameter of the screen mesh positioned above is larger than that of the screen mesh positioned below in two adjacent screen meshes;

the flat scraping assembly comprises a scraping rope and a driving unit, wherein the flexible scraping rope and the driving unit are used for driving the scraping rope to do circumferential rotation, and the circumferential outer edge of the scraping rope is attached to the top surface of the screen.

Preferably, in order to increase the number of scraping ropes to rapidly scrape the powder material on the screen, the scraping ropes are provided with at least two.

Preferably, in order to facilitate uniform spreading of the powder material on the screen, the screen is disc-shaped, and the axis of rotation of the scraping rope coincides with the axis of the screen.

Preferably, in order to drive the scraping rope to rotate, the driving unit comprises a rotating shaft penetrating through the screen in a sealing mode and a rotating unit driving the rotating shaft to rotate around the axis of the rotating shaft, and the rotating shaft is connected with the scraping rope.

Preferably, in order to drive the rotating shaft to rotate around the axis line of the rotating shaft and increase the uniformity of powder falling on the top screen from the feeding port, the rotating unit comprises a driving source connected with the vibrating shell, a driving wheel connected with the output end of the driving source and a driven wheel connected with the axis line of the rotating shaft, the driving wheel is in transmission connection with the driven wheel through a transmission belt, and the driven wheel is located under the feeding port.

Preferably, in order to make the scraping rope fit on the surface of the screen, the flat scraping assembly further comprises a guide piece connected with the rotating shaft, and the scraping rope is wound on the guide piece and is in a tensioning state.

Preferably, in order to increase the fit portion of the scraping rope to the surface of the screen, two guiding members are provided, the scraping rope disposed between the two guiding members is fitted to the screen along the radial direction of the screen.

Preferably, in order to ensure that the scraping rope is tensioned and attached to the surface of the screen during the running of the device, one of the two guide members, which is adjacent to the axial line of the screen, is fixedly connected with the rotating shaft, and the other guide member is slidably arranged along the radial direction of the screen.

Preferably, in order to further increase the looseness and uniformity of the screen at the top position where the PA powder falls from the feed inlet, a cloth through hole is arranged on the driven wheel, two orifices of the cloth through hole are respectively positioned on two end faces of the driven wheel, and the cloth through hole is arranged right below the feed inlet.

Preferably, in order to prevent the scraping rope from separating from the guide piece, a positioning through groove for the scraping rope to pass through is formed in one surface of the guide piece adjacent to the scraping rope, and the groove depth of the positioning through groove is smaller than the outer diameter of the scraping rope.

In summary, compared with the prior art, the scraping and screening device for the PA powder for rotational molding has the advantages that the scraping ropes are driven by the driving unit to rotate on the top surface of the screen, powder particles on the screen are stirred, the looseness of materials on the screen is increased, large-particle powder blocked on meshes of the screen is removed, the meshes are prevented from being blocked, the screening effect on the powder particles is improved, and the particle sizes of the discharged PA powder particles are kept uniform, so that the quality of rotational molding products is improved.

Drawings

FIG. 1 is a schematic view of the structure of a first embodiment of rotomolding of the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view taken along the direction A-A of FIG. 2;

FIG. 4 is an exploded view of FIG. 1;

FIG. 5 is a schematic view of the construction of a driven wheel of a first embodiment of the rotational molding of the present utility model;

FIG. 6 is a schematic view of a part of the structure of a second embodiment of the present utility model;

fig. 7 is an enlarged view of a portion a of fig. 6;

FIG. 8 is a side view of FIG. 6;

FIG. 9 is a schematic view of the structure of a guide member according to a second embodiment of the present utility model;

FIG. 10 is a schematic view showing a part of the structure of a third embodiment of the present utility model;

fig. 11 is an enlarged view of a portion B of fig. 10;

in the figure: 100. a vibration case; 101. a feed inlet; 102. a discharge port; 200. a fixing frame; 300. an elastic connection member; 301. a spring; 302. a limit rod; 400. a vibration source; 401. a vibration motor; 402. a vibration frame; 500. a screen; 600. scraping ropes; 700. a rotating shaft; 800. a rotation unit; 801. a driving source; 802. a driving wheel; 803. driven wheel; 8031. a cloth through hole; 804. a transmission belt; 900. a guide member; 901. positioning through grooves; 110. a dust cover; 120. a bottom plate; 121. a bearing; 130. a sieving cylinder; 140. a sealing plate; 150. blanking shells; 151. a blanking port; 160. a connecting frame; 170. a sliding sleeve; 180. a vertical rod; 190. u-shaped frame.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

First embodiment

As shown in fig. 1 to 5, a shaving and sieving apparatus for PA powder for rotational molding according to a first embodiment of the present utility model includes:

the vibration shell 100 is provided with an inner cavity, the top of the vibration shell 100 is provided with a feed inlet 101, the side wall of the vibration shell is provided with a plurality of discharge outlets 102, and the feed inlet 101 and the discharge outlets 102 are communicated with the inner cavity;

the vibration motor comprises a fixing frame 200 and an elastic connecting piece 300, wherein the fixing frame 200 is connected with the vibration shell 100 through the elastic connecting piece 300;

the vibration source 400 is arranged on the fixing frame 200, and the output end of the vibration source 400 is connected with the vibration shell 100;

the screens 500 are distributed in the vibrating shell 100 along the vertical direction to divide the screens 500 into screening cavities corresponding to the discharge holes 102 one by one, and in two adjacent screens 500, the mesh aperture of the screen 500 positioned above is larger than that of the screen 500 positioned below;

the flat scraping assembly comprises a scraping rope 600 and a driving unit, wherein the scraping rope 600 is flexible, the peripheral edge of the scraping rope is attached to the top surface of the screen 500, and the driving unit drives the scraping rope 600 to rotate in the circumferential direction.

Specifically, in this embodiment, the vibration shell 100 is a hollow shell structure along the vertical direction, the cross section of the circumferential outer edge of the vibration shell 100 is in a ring shape, the vibration shell 100 sequentially includes the dust cover 110 and the three sieving cylinders 130 from top to bottom, the two sieving cylinders 130 located above are internally fixed with the disc-shaped screen mesh 500, the sieving cylinder 130 located at the bottommost is internally fixed with the sealing plate 140 and the bottom plate 120 which are distributed at intervals from top to bottom, the mesh aperture of the screen mesh 500 at the highest position is greater than the mesh aperture of the screen mesh 500 at the lowest position, and the circumferential outer edges of the screen mesh 500, the sealing plate 140 and the bottom plate 120 are fixedly connected with the circumferential inner wall of the sieving cylinder 130 and horizontally arranged, so that the vibration shell 100 is divided into three sieving cavities distributed along the height direction of the vibration shell 100 by the two screen meshes 500. Screen cloth 500 level sets up, is favorable to tiling the PA powder granule material of batch on screen cloth 500, has improved the screening effect to the powder material, and is favorable to increasing powder material and screen cloth 500 area of contact to increase material pine degree improves screening efficiency, avoids screen cloth 500 slope or has the slope back, leads to the PA powder to pile up the gathering in screen cloth 500's place position, makes the area of contact of material and screen cloth 500 reduce, reduces screening efficiency and piles up the partial granule of position eminence simultaneously and just discharge through discharge gate 102 through the screening.

The feed inlet 101 is provided at the top of the dust cover 110 so as to add PA powder particle material from the top of the vibration case 100 into the inner cavity thereof, and screen the PA powder material into three particle size ranges by two screens 500 having decreasing mesh diameters from top to bottom; the three discharge ports 102 are respectively arranged on the three screening barrels 130 in a one-to-one correspondence manner, the bottoms of the three discharge ports 102 are respectively flush with the top surfaces of the two screens 500 and the top surface of the sealing plate 140, the three discharge ports 102 are connected with hollow and horizontal blanking shells 150, the blanking shells 150 are long-strip-shaped, one ends of the blanking shells are communicated with the discharge ports 102, the bottom surfaces of the other ends of the blanking shells are provided with blanking ports 151 communicated with the inner cavities of the blanking shells, after PA powder materials fall on the screens 500, small particles with the particle sizes smaller than or equal to the mesh sizes of the screens 500 pass through the meshes, and other large particles enter the blanking shells 150 through the discharge ports 102 under the vibration of the vibration shells 100, are discharged through the blanking ports 151, the three blanking ports 151 are arranged at projection intervals on a horizontal plane, so that the blanking ports 151 are conveniently connected into a material collecting bag, and the PA powder material particles in the three particle size ranges are collected.

The mount 200 is fixed base, is fixed in subaerial, sets up under vibrating shell 100, and elastic connection spare 300 sets up between mount 200 and vibrating shell 100, and it is a plurality of to distribute along the week Xiang Junyun of vibrating shell 100, and elastic connection spare 300 includes spring 301 and gag lever post 302, and the both ends of spring 301 are respectively with vibrating shell 100 and bottom plate 120 fixed connection, and gag lever post 302 is located the inboard of spring 301, extends along the plumb direction and is fixed in the below of bottom plate 120, and the top of mount 200 is provided with the turn-ups, is provided with the spacing through-hole that supplies gag lever post 302 lower part to wear to establish on the turn-ups, and the circumference inner wall of spacing through-hole exists the interval with the circumference outward flange of gag lever post 302. After adopting above-mentioned structure, play the supporting role to vibrating shell 100 through the spring 301 in a plurality of elastic connection piece 300, simultaneously because spring 301 compressive deformation, make things convenient for vibration source 400 to start the back, drive vibrating shell 100 and vibrate to through the inside screen cloth 500 of vibrating shell 100 to the PA powder granule material that different particle diameter ranges is piled up carries out screening processing, and through the spacing cooperation of gag lever post 302 and spacing through-hole, the vibration range of limiting vibration shell 100 also is the vibration range of motion of vibrating shell 100, guarantees the stable operation of device.

The vibration source 400 comprises a vibration frame 402 and a vibration motor 401, the vibration frame 402 is arranged below the bottom plate 120, a shell of the vibration motor 401 is fixed on the vibration frame 402, an output end of the vibration motor 401 is connected with the bottom plate 120, the vibration frame 402 is used for fixedly mounting the vibration motor 401 when screening materials, after the vibration motor 401 is started, the output end of the vibration motor 401 acts on the bottom plate 120 to drive the screening cylinder 130 and the screen cloth 500 and the sealing plate 140 on the inner side of the screening cylinder 130, and the vibration shell 100 is driven to vibrate so as to screen the PA powder materials into materials with different particle size ranges through the screen cloth 500.

When carrying out material screening, drive unit and vibration source 400 move simultaneously, drive unit drives back scraper rope 600 and rotates at the top surface of screen cloth 500, stir the powder material rather than the top surface laminating on the screen cloth 500, on the one hand, can flat scrape the material, make on material tiling and the screen cloth 500, the looseness of increase material is in order to enlarge the area of contact of material and screen cloth 500, make more little particle diameter materials, that is, the particle diameter is less than or equal to screen cloth 500 mesh aperture's material passes through screen cloth 500, improve screening efficiency, and on the other hand, to the big particle diameter material of jam on screen cloth 500 mesh, through the rotation of scraper rope 600, can sweep away the big particle diameter material of jam, make the mesh that is blockked up before can obtain the mediation, so that little particle diameter material passes through this mesh, further increase the screening efficiency of material.

A further improvement is that the wiper cord 600 is provided with at least two. In this embodiment, all be provided with four on two-layer screen cloth 500 and scrape rope 600, and scrape the rope 600 and regard self rotation axial lead as central line equidistant annular distribution, after adopting above-mentioned structure, increased the quantity of scraping rope 600, enlarged the application range of scraping rope 600, make every scrape rope 600 only need rotate after 90, can carry out the flat scraping to whole screen cloth 500 top surface, scrape rope 600 and continue to rotate, can with PA powder material tiling on screen cloth 500, and along with the vibration of vibration shell 100, make the powder granule that the particle diameter is greater than screen cloth 500 mesh break away from behind the screen cloth 500 mesh, discharge through discharge gate 102, and other little particle diameter powder materials pass through screen cloth 500 mesh, in order to realize the screening of big or small particle diameter powder material. Of course, the number of the scraping ropes 600 can be other multiple, and compared with a single scraping rope 600, the screening efficiency of the powder materials is improved.

Further improvement is that the screen 500 is in a shape of a circular plate, and the axis of rotation of the scraper 600 coincides with the axis of the screen 500. After adopting above-mentioned structure, guarantee to scrape rope 600 rotation in-process, can evenly act on the powder material of screen cloth 500 top surface along the circumference of screen cloth 500 for powder material tiling is with increasing powder screening efficiency. Further, both ends of the scraper rope 600 are respectively adjacent to the axial lead of the screen 500 and the circumferential outer edge of the screen 500, so that the length of the scraper rope 600 is increased, and the acting range of the scraper rope 600 is enlarged after the scraper rope 600 rotates, so that the screening efficiency of powder materials is improved.

Further improved is that the driving unit comprises a rotating shaft 700 penetrating through the screen 500 in a sealing way and a rotating unit 800 driving the rotating shaft 700 to rotate around the axis of the rotating shaft 700, and the rotating shaft 700 is connected with the scraping rope 600. The rotating shaft 700 extends along the vertical direction, the top surface of the bottom plate 120 is provided with a bearing 121, the outer ring of the bearing 121 is fixed on the bottom plate 120, the bottom of the rotating shaft 700 penetrates through the sealing plate 140 in a sealing manner, the circumferential outer edge of the rotating shaft 700 is fixedly connected with the circumferential inner wall of the inner ring of the bearing 121, and one end of the scraping rope 600 is fixedly connected with the rotating shaft 700. After the rotating unit 800 is started, the rotating unit acts on the rotating shaft 700, and the rotating shaft 700 is supported by the bearing 121 to rotate stably, so that the scraping rope 600 is driven to rotate, and the material is scraped flatly.

Further improved is that the rotation unit 800 comprises a driving source 801 connected with the vibration shell 100, a driving wheel 802 connected with the output end of the driving source 801 in a coaxial way and a driven wheel 803 connected with the rotating shaft 700 in a coaxial way, wherein the driving wheel 802 is in transmission connection with the driven wheel 803 through a transmission belt 804, and the driven wheel 803 is positioned under the feed inlet 101. In this embodiment, the driving source 801 is a driving motor fixed at one side of the feed inlet 101 of the dust cover 110, the output end of the driving motor is downward and penetrates the dust cover 110 in a sealing manner, the output end of the driving motor is fixedly connected with the driving wheel 802 by a coaxial line, and the driven wheel 803 is fixed at the top of the rotating shaft 700. When the rotating shaft 700 and the scraping rope 600 need to be driven to rotate, a driving motor serving as a driving source 801 is started to drive a driving wheel 802 to rotate, and the driving wheel 802 acts on a driven wheel 803 through a driving belt 804, so that the driven wheel 803 rotates, and the rotating shaft 700 and the scraping rope 600 on the rotating shaft 700 are driven to rotate. In order to ensure stable mechanical transmission of the driving wheel 802, the driven wheel 803 and the driving belt 804, the driving wheel 802 and the driven wheel 803 are spool, and the driving belt 804 is a synchronous belt.

Further improvement is that a cloth through hole 8031 is arranged on the driven wheel 803, two orifices of the cloth through hole 8031 are respectively positioned on the top surface and the bottom surface of the driven wheel 803, and the cloth through hole 8031 is positioned under the feeding hole 101. In this embodiment, the distribution through holes 8031 are fan-shaped through holes, the axial lines of which are coincident with the axial lines of the driven wheels 803, the distribution through holes 8031 are six, the distribution through holes 8031 are distributed in an annular manner at equal intervals by taking the axial lines of the driven wheels 803 as the central lines, and the projection of the distribution through holes 8031 on the horizontal plane is coincident with the projection part of the feed inlet 101 on the horizontal plane. After adopting above-mentioned structure, PA powder material falls from feed inlet 101 perpendicularly downwards, simultaneously driving source 801 drives from the rotation of driving wheel 803, because from the driving wheel 803 is located the feed inlet 101 under, PA powder is when passing from the driving wheel 803, a part passes through the cloth through-hole 8031 of driving wheel 803, fall on the central point of top screen cloth 500, namely be close to the position of pivot 700, and another part falls on the top surface of driving wheel 803, when from the driving wheel 803 rotation, from the driving wheel 803 throws this part of material out, give this part of material certain speed, make this part of material fall in the central point that keeps away from pivot 700, so, increased the loose degree that PA powder material falls on top screen cloth 500 through feed inlet 101, be favorable to screen cloth 500 vibration after carry out fast screening to the powder material. Of course, in this embodiment, the distribution holes 8031 may be in other shapes, numbers and distribution modes, and the PA powder material falling on the top screen 500 is divided into two parts by driving the driven wheels 803 of the distribution holes 8031, so as to increase the looseness of the powder material and improve the screening efficiency.

Second embodiment

As shown in fig. 6 to 9, the shaving and screening apparatus for PA powder for rotational molding according to the second embodiment of the present utility model is based on the first embodiment, and is different in that the shaving assembly further includes a guide 900 connected to the rotation shaft 700, and the shaving cord 600 is wound around the guide 900 and is in tension.

Specifically, the flat scraping assembly comprises an L-shaped connecting frame 160, one end of the connecting frame 160 is fixedly connected with the rotating shaft 700, the other end of the connecting frame is provided with a guide piece 900, the guide piece 900 is a guide wheel, one end of the scraping rope 600 is fixedly connected with the rotating shaft 700, the other end of the scraping rope 600 is wound on the guide piece 900 and is fixedly connected with the connecting frame 160, and the scraping rope 600 is clamped between the guide piece 900 and the screen 500.

In the above-mentioned device, confirm the position of guide 900 through link 160, utilize guide 900 to compress tightly scraper rope 600 on screen cloth 500, and scraper rope 600 is laminated on screen cloth 500 equally with the one end that pivot 700 is connected for scraper rope 600 and screen cloth 500 laminating between pivot 700 and the guide 900, compare in first embodiment, this embodiment can guarantee scraper rope 600 and screen cloth 500 top surface laminating all the time, in order to realize the flat function of scraping to screen cloth 500, will block up the big granule powder in mesh department, so that make things convenient for the granule powder to pass through screen cloth 500 mesh, with granule powder tiling on screen cloth 500 simultaneously, increase area of contact and looseness, and then improve screening efficiency.

Further improved is that the surface of the guide 900 adjacent to the scraping rope 600 is provided with a positioning through groove 901 for the scraping rope 600 to pass through, and the groove depth of the positioning through groove 901 is smaller than the outer diameter of the scraping rope 600. Specifically, the circumferential outer edge of the guide wheel is provided with an annular positioning through groove 901.

Through the positioning through groove 901, the relative positions of the scraping rope 600 and the guide piece 900 are conveniently fixed, and the outer diameter of the scraping rope 600 is larger than the groove depth of the positioning through groove 901, so that the guide piece 900 and the screen 500 are prevented from being worn out when the guide piece 900 rotates due to the fact that the rigid guide piece 900 is contacted with the screen 500 while the scraping rope 600 is contacted with the screen 500 in a fitting mode.

Third embodiment

As shown in fig. 10 and 11, the scraping and sieving apparatus for PA powder for rotational molding according to the third embodiment of the present utility model is based on the second embodiment, and is different in that two guide members 900 are provided, and are distributed along the radial direction of the screen 500, and the scraping ropes 600 provided between the two guide members 900 are attached to the screen 500; of the two guide members 900, the guide member 900 adjacent to the axial line of the screen 500 is fixedly connected to the rotation shaft 700, and the other guide member 900 is slidably disposed along the radial direction of the screen 500.

Specifically, in this embodiment, two guide members 900 are respectively adjacent to the axial line and the circumferential outer edge of the screen 500, two U-shaped frames 190 are respectively connected to two guide members 900, the guide members 900 are disposed in the U-shaped openings of the U-shaped frames 190, the U-shaped frames 190 are fixedly connected with vertical rods 180 extending in the vertical direction, the connecting frames 160 are horizontal cross rods, the vertical rods 180 connected to the guide members 900 adjacent to the axial line of the screen 500 are fixedly connected to the rotating shafts 700, the lower parts of the connecting frames 160 are fixed to the vertical rods 180 connected to the other guide members 900, a sliding sleeve 170 is fixed to the top parts of the vertical rods 180 connected to the other guide members 900, and the sliding sleeve 170 is sleeved outside the connecting frames 160 and is in sliding fit with the connecting frames 160; the scraper rope 600 is in a waist-round shape, and two ends of the scraper rope are respectively wound outside the two guide pieces 900 and fixedly connected with the guide pieces 900.

Compared with the second embodiment, in the present embodiment, when the device is in operation, the rotating shaft 700 drives the connecting frame 160 to rotate, so that the sliding sleeve 170 and the two guiding elements 900 under the connecting frame 160 rotate synchronously, the sliding sleeve 170 is influenced by the centrifugal force, a trend of moving away from the axis of the screen 500 is generated, so that the guiding elements 900 under the sliding sleeve 170 rotate and simultaneously generate a trend of moving away from the axis of the screen 500, the scraping rope 600 is tensioned, and at the moment, two ends of the scraping rope 600 are respectively adjacent to the axis of the rotating shaft 700 and the circumferential outer edge of the screen 500, so that the scraping rope 600 has a sufficient action range, large-particle-diameter PA powder particles blocked on meshes of the screen 500 are removed, and stacked powder materials are tiled; after the equipment stops running, the sliding sleeve 170 loses the influence of the centrifugal force, so that the original scraping rope 600 is not kept in a tensioning state any more, and therefore, in an idle state, the scraping rope 600 is in a natural state, thereby being beneficial to prolonging the service life of the scraping rope 600 and avoiding the scraping rope 600 from being tensioned all the time to shorten the service life.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. The utility model provides a strickle screening arrangement of PA powder for rotational moulding which characterized in that includes:

the vibrating shell (100) is provided with an inner cavity, the top of the vibrating shell (100) is provided with a feeding hole (101), the side wall of the vibrating shell is provided with a plurality of discharging holes (102), and the feeding hole (101) and the discharging holes (102) are communicated with the inner cavity;

the vibration shell comprises a fixing frame (200) and an elastic connecting piece (300), wherein the fixing frame (200) is connected with the vibration shell (100) through the elastic connecting piece (300);

the vibration source (400) is arranged on the fixing frame (200), and the output end of the vibration source (400) is connected with the vibration shell (100);

the screen meshes (500) are distributed in the vibrating shell (100) along the vertical direction so as to divide the screen meshes (500) into screening cavities corresponding to the discharge holes (102) one by one, and the mesh pore diameter of the screen mesh (500) positioned above is larger than that of the screen mesh (500) positioned below in two adjacent screen meshes (500);

the flat scraping assembly comprises a scraping rope (600) with the flexible circumferential outer edge attached to the top surface of the screen (500) and a driving unit for driving the scraping rope (600) to rotate circumferentially.

2. The shaving and sieving apparatus for PA powder for rotational molding according to claim 1, characterized in that: the scraper rope (600) is provided with at least two.

3. The shaving and sieving apparatus for PA powder for rotational molding according to claim 1, characterized in that: the screen (500) is disc-shaped, and the axis of rotation of the scraping rope (600) coincides with the axis of the screen (500).

4. A shaving and sieving apparatus for PA powder for rotomolding as claimed in claim 3, characterized in that: the driving unit comprises a rotating shaft (700) penetrating through the screen (500) in a sealing mode and a rotating unit (800) driving the rotating shaft (700) to rotate around the axis of the rotating shaft, and the rotating shaft (700) is connected with the scraping rope (600).

5. The shaving and sieving apparatus for PA powder for rotational molding according to claim 4, characterized in that: the rotary unit (800) comprises a driving source (801) connected with the vibration shell (100), a driving wheel (802) connected with the output end of the driving source (801) in a coaxial line mode and a driven wheel (803) connected with the rotating shaft (700) in a coaxial line mode, the driving wheel (802) is in transmission connection with the driven wheel (803) through a transmission belt (804), and the driven wheel (803) is located under the feeding hole (101).

6. The shaving and sieving apparatus for PA powder for rotational molding according to claim 1, characterized in that: the scraping assembly further comprises a guide piece (900) connected with the rotating shaft (700), and the scraping rope (600) is wound on the guide piece (900) and is in a tensioning state.

7. The shaving and sieving apparatus for PA powder for rotational molding according to claim 6, characterized in that: the two guide members (900) are distributed along the radial direction of the screen (500), and the scraping ropes (600) arranged between the two guide members (900) are attached to the screen (500).

8. The shaving and sieving apparatus for PA powder for rotational molding according to claim 7, characterized in that: among the two guide pieces (900), the guide piece (900) adjacent to the axial lead of the screen (500) is fixedly connected with the rotating shaft (700), and the other guide piece (900) is arranged along the radial sliding of the screen (500).

9. The shaving and screening apparatus for PA powder for rotational molding according to any one of claims 6 to 8, characterized in that: the automatic feeding device is characterized in that a material distribution through hole (8031) is formed in the driven wheel (803), two orifices of the material distribution through hole (8031) are respectively located on two end faces of the driven wheel (803), and the material distribution through hole (8031) is arranged right below the feeding hole (101).

10. The shaving and screening apparatus for PA powder for rotational molding according to any one of claims 6 to 8, characterized in that: one surface of the guide piece (900) adjacent to the scraping rope (600) is provided with a positioning through groove (901) for the scraping rope (600) to pass through, and the groove depth of the positioning through groove (901) is smaller than the outer diameter of the scraping rope (600).