CN111070471A - Post-treatment process for extrusion granulation of general polyurethane plastic - Google Patents
Post-treatment process for extrusion granulation of general polyurethane plastic Download PDFInfo
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- CN111070471A CN111070471A CN201911367013.1A CN201911367013A CN111070471A CN 111070471 A CN111070471 A CN 111070471A CN 201911367013 A CN201911367013 A CN 201911367013A CN 111070471 A CN111070471 A CN 111070471A
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- guide roller
- roller
- conveying
- conveying belt
- polyurethane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G45/00—Lubricating, cleaning, or clearing devices
- B65G45/10—Cleaning devices
- B65G45/18—Cleaning devices comprising brushes
Abstract
The invention belongs to the technical field of polyurethane granulation, and particularly relates to a post-treatment process for extrusion granulation of polyurethane general plastic, which comprises the following steps: step one, primary screening: feeding polyurethane particles into the shell from the feeding hole, and performing primary screening on the polyurethane particles through a first conveying belt between a first conveying roller and a first guide roller and a second conveying belt between a third conveying roller and a fourth guide roller; step two, secondary screening: the polyurethane particles after primary screening are subjected to secondary screening through a first conveying belt between a second guide roller and a third guide roller and a second conveying belt between a fifth guide roller and a sixth guide roller; step three, classified collection: and collecting the polyurethane particles subjected to the two-stage screening according to the large, medium and small types of the volume by using a collecting device. When the polyurethane particles are treated by adopting the method, the polyurethane particles are prevented from being bonded into blocks, and the screening effect and the land utilization rate of a production workshop are improved.
Description
Technical Field
The invention belongs to the technical field of polyurethane plastic granulation, and particularly relates to a post-treatment process for extrusion granulation of polyurethane general plastic.
Background
The granulation technology is widely applied in various industries such as chemical industry, medicine, food, building materials, metallurgy and the like, and is continuously innovated, developed and improved in the application process, and various different granulation methods are created. The granulation can make the polyurethane plastics more sufficient, durable, and the structure is more exquisite. The prior polyurethane is directly packaged and transported or sent into subsequent processing equipment for processing after granulation is finished, so that the following problems exist in the subsequent transportation or processing process: (1) the polyurethane particles are not fully cooled, the internal temperature is still high, and the heat in the polyurethane particles is gradually transferred to the outside, so that the surface temperature of the polyurethane particles is increased, the viscosity is increased, the adjacent polyurethane particles are bonded together to form blocks, and the granulation effect is seriously influenced; (2) after granulation, polyurethane particles with different volume sizes are mixed together, and screening cannot be carried out; because the polyurethane particles with different volume sizes have different physical properties, the physical properties of the processed finished product cannot be accurately controlled when the polyurethane particles are mixed together for subsequent processing.
Disclosure of Invention
Technical problem to be solved
The invention provides a post-treatment process for extrusion granulation of polyurethane general plastic, which aims to solve the following problems in the prior art that the polyurethane plastic is directly transported or processed after granulation: (1) the polyurethane particles are not fully cooled, the internal temperature is still high, and the heat in the polyurethane particles is gradually transferred to the outside, so that the surface temperature of the polyurethane particles is increased, the viscosity is increased, the adjacent polyurethane particles are bonded together to form blocks, and the granulation effect is seriously influenced; (2) after granulation, polyurethane particles with different volume sizes are mixed together, and screening cannot be carried out; because the polyurethane particles with different volume sizes have different physical properties, the physical properties of the processed finished product cannot be accurately controlled when the polyurethane particles are mixed together for subsequent processing.
(II) technical scheme
In order to solve the technical problems, the invention adopts the following technical scheme:
a post-treatment process for extrusion granulation of general polyurethane plastic is completed by matching a post-treatment device for polyurethane granulation, wherein the post-treatment device for polyurethane granulation comprises a base, and a shell with a rectangular cross section is fixedly mounted at the top of the base. The top surface of the shell is provided with a feed inlet parallel to the left and right side walls of the shell. A first conveying roller, a first guide roller, a second guide roller, a third guide roller and a second conveying roller are horizontally and rotatably matched between the front side wall and the rear side wall inside the shell. The first conveying roller is located on the left side below the feed inlet, the first guide roller is located on the right side below the first conveying roller, the second guide roller is located on the left side below the first guide roller, the third guide roller is located on the right side below the second guide roller, and the second conveying roller is located on the left side below the third guide roller. First conveying roller, first guide roll, second guide roll, third guide roll and second conveying roller lateral wall normal running fit have first conveyer belt, have evenly seted up the sieve mesh on the first conveyer belt. And a third conveying roller, a fourth guide roller, a fifth guide roller, a sixth guide roller and a fourth conveying roller are horizontally and rotatably matched between the front side wall and the rear side wall in the shell. And a second conveying belt is rotationally matched with the outer side walls of the third conveying roller, the fourth guide roller, the fifth guide roller, the sixth guide roller and the fourth conveying roller. The second conveyer belt is located inside the first conveyer belt and is parallel to the first conveyer belt, sieve pores are evenly arranged on the second conveyer belt, and the area of the sieve pores on the second conveyer belt is smaller than that of the sieve pores on the first conveyer belt. In the actual production process, the proper mesh area is selected according to the volume size of the required screening.
A first material guide plate, a second material guide plate and a third material guide plate are fixedly arranged between the front side wall and the rear side wall inside the shell. The first material guide plate is positioned above the second conveying belt between the fourth guide roller and the fifth guide roller and below the second conveying belt between the third conveying roller and the fourth guide roller. The second guide plate is positioned above the first conveying belt between the first guide roller and the second guide roller and below the second conveying belt between the fourth guide roller and the fifth guide roller. The third material guide plate is positioned below the first conveying belt between the first guide roller and the second guide roller and above the first conveying belt between the second guide roller and the third guide roller. The inside collection device that is provided with of shell. The first material guide plate plays a role in guiding materials on one hand, and on the other hand, small-volume polyurethane particles screened out are prevented from passing through the second conveying belt again to be mixed with medium-volume polyurethane particles. The second material guide plate plays a role in guiding materials on one hand, and on the other hand, the screened small and medium-sized polyurethane particles are prevented from passing through the first conveying belt again and being mixed with the large and small-sized polyurethane particles.
The post-treatment process for extruding and granulating the universal polyurethane plastic comprises the following steps:
step one, primary screening: and throwing the polyurethane particles into the shell from the feeding hole, and enabling the polyurethane particles to fall to the upper surface of the first conveying belt between the first conveying roller and the first guide roller. The polyurethane particles with large volume are left above the first conveying belt and slide down to the third material guide plate along with the first conveying belt, and a part of the polyurethane particles with medium volume and small volume pass through the first conveying belt and fall to the upper surface of the second conveying belt between the third conveying roller and the fourth guide roller; and a part of small-volume polyurethane particles fall onto the first guide plate through the second conveyer belt, and medium-volume polyurethane particles are left above the second conveyer belt and slide downwards along with the second conveyer belt onto the second guide plate. The small-volume polyurethane particles on the first material guide plate fall into a collecting device, and the primary screening is completed.
Step two, secondary screening: polyurethane particles on the third material guide plate slide to the upper surface of the first conveying belt between the second guide roller and the third guide roller, and large-volume polyurethane particles are left above the first conveying belt and slide downwards along with the first conveying belt to the collecting device. And the residual small and medium-volume polyurethane particles pass through the first conveying belt and fall to the upper surface of a second conveying belt between the fifth guide roller and the sixth guide roller, the medium-volume polyurethane particles are remained above the second conveying belt and slide downwards along with the second conveying belt to a collecting device, and the small-volume polyurethane particles pass through the second conveying belt and fall to the collecting device, so that secondary screening is completed.
Step three, classified collection: and collecting the polyurethane particles subjected to the two-stage screening according to the large, medium and small types of the volume by using a collecting device.
In a preferred embodiment of the present invention, the collection unit includes a first collection bucket, a second collection bucket, and a third collection bucket horizontally slidably installed between the front and rear side walls of the housing. The first collecting hopper is positioned below the third guide roller. The second collecting hopper is positioned above the first conveying belt between the third guide roller and the second conveying roller and below the second conveying belt between the sixth guide roller and the fourth conveying roller. A third collection hopper is positioned below the second conveyor belt between the fifth guide roller and the sixth guide roller. The polyurethane particles accumulated on the large scale fall into the first collecting hopper after sliding on the first conveying belt, the polyurethane particles accumulated on the middle body fall into the second collecting hopper after sliding on the second conveying belt, one part of the polyurethane particles accumulated on the small body falls into the third collecting hopper from the first material guide plate, and the other part of the polyurethane particles accumulated on the small body falls into the third collecting hopper after passing through the second conveying belt for secondary screening.
In a preferred technical scheme of the invention, in the post-treatment device for polyurethane granulation, a first motor is fixedly mounted on the rear side wall of a shell, and the output end of the first motor is fixedly connected with a second conveying roller. The second conveying roller and the fourth conveying roller are connected through a transmission belt. Drive the second conveying roller through first motor and rotate to drive first conveyer belt motion, drive the fourth conveying roller rotation when the second conveying roller pivoted, thereby drive the motion of second conveyer belt.
In a preferable technical scheme of the invention, in the post-treatment device for polyurethane granulation, a first fan and a second fan are symmetrically and fixedly installed on the front side wall and the rear side wall of a shell. The first fan and the first guide roller are positioned on the same horizontal plane, and the second fan and the third guide roller are positioned on the same horizontal plane. First fan and second fan are bloied the polyurethane granule in to the shell, dispel the heat that the polyurethane granule gave out, accelerate the cooling of polyurethane granule.
As a preferred technical solution of the present invention, in the post-treatment device for polyurethane granulation, a second motor and a third motor are fixedly mounted on a front side wall of a housing, an output end of the second motor is fixedly connected to a first cam shaft, and an output end of the third motor is fixedly connected to a second cam shaft. The first cam shaft is in contact with the upper surface of the first conveyor belt between the first conveyor roller and the first guide roller, and the second cam shaft is in contact with the upper surface of the first conveyor belt between the second guide roller and the third guide roller. Drive first camshaft rotation through the second motor to beat the vibration to the first conveyer belt of one-level screening in-process, play the effect of refining to the polyurethane granule on the first conveyer belt, improve the effect of one-level screening. Drive the rotation of second camshaft through the third motor to beat the vibration to the first conveyer belt of second grade screening in-process, play the effect of refining to the polyurethane granule on the first conveyer belt, improve the effect of second grade screening.
In a preferred embodiment of the present invention, the third cam shaft and the fourth cam shaft are rotatably mounted between the front and rear side walls of the housing. The first camshaft and the third camshaft and the second camshaft and the fourth camshaft are connected through a transmission belt. The third cam shaft is matched with the lower surface of the second conveying belt between the third conveying roller and the fourth guide roller, and the fourth cam shaft is matched with the lower surface of the second conveying belt between the fifth guide roller and the sixth guide roller. Drive the rotation of third camshaft through first camshaft to beat the vibration to the second conveyer belt of one-level screening in-process, play the effect of refining to the polyurethane granule on the second conveyer belt, improve the effect of one-level screening. Drive the rotation of fourth camshaft through the second camshaft to beat the vibration to the second conveyer belt of second grade screening in-process, play the effect of refining to the polyurethane granule on the second conveyer belt, improve the effect of second grade screening.
As a preferable technical scheme of the invention, in the polyurethane granulation post-treatment device, a plurality of brush rollers are rotatably arranged between the front side wall and the rear side wall of the shell. The brush rollers are respectively positioned above the first guide roller, the second guide roller, the third guide roller, the fourth guide roller, the fifth guide roller and the sixth guide roller and are respectively contacted with the lower surface of the first conveying belt or the lower surface of the second conveying belt. In the moving process of the first conveying belt and the second conveying belt, the brush bristles on the brush rollers clean the polyurethane particles attached to the surfaces of the first conveying belt and the second conveying belt, and the polyurethane particles are prevented from being squeezed between the conveying belts and the guide rollers, so that the conveying stability is improved.
In a preferable technical scheme of the invention, in the post-treatment device for polyurethane granulation, through holes are formed in the side edges of the first conveying belt and the second conveying belt. And the outer surface of the brush roller is fixedly provided with a driving rod matched with the through hole. In the motion process of the first conveying belt and the second conveying belt, the through holes and the transmission rods are in a matched state, so that the brush roller can be driven to rotate, centrifugal force is generated in the rotation process of the brush roller, polyurethane particles attached to bristles are thrown away, the polyurethane particles fall into the guide plate or the conveying belt below, the polyurethane particles are prevented from being accumulated on the brush roller, and the cleaning efficiency of the brush roller is improved.
(III) advantageous effects
The invention has the following beneficial effects:
(1) when the polyurethane particles are treated by adopting the general plastic extrusion granulation post-treatment process for polyurethane provided by the invention, the first conveying belt and the second conveying belt are subjected to three-time turning to enable the conveying belts to be of a multilayer structure, so that on one hand, the residence time of the polyurethane particles on the conveying belts is increased, and the contact time of the polyurethane particles and air is prolonged, thereby being beneficial to full heat dissipation of the polyurethane particles and avoiding the polyurethane particles from being bonded into blocks; on the other hand, the structure of the multi-layer conveying belt greatly reduces the occupied area of equipment and improves the land utilization rate of a production workshop.
(2) When the polyurethane particles are treated by adopting the post-treatment process for extruding and granulating the general plastic for polyurethane provided by the invention, the polyurethane particles are screened by the first conveying belt and the second conveying belt, and the polyurethane particles are screened into three types, namely large, medium and small, according to the volume. In the screening process, the two-stage screening is realized through the structure of the multilayer conveying belt, and the screening effect is improved.
(3) According to the polyurethane granulation post-treatment device, the brush roller is driven to rotate by the movement of the first conveying belt and the second conveying belt, and the brush roller cleans part of polyurethane particles attached to the surfaces of the first conveying belt and the second conveying belt, so that the polyurethane particles are prevented from being squeezed between the conveying rollers and the conveying belts, and the running stability of equipment is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a diagram illustrating the steps of a post-treatment process for extrusion granulation of a general polyurethane plastic according to an embodiment of the present invention;
FIG. 2 is a sectional view showing the internal structure of a post-treatment apparatus for granulating polyurethane in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first perspective structure of a post-treatment device for polyurethane granulation in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a second perspective structure of the post-treatment device for polyurethane granulation in the embodiment of the present invention;
FIG. 5 is a schematic view of a portion of a first conveyor belt according to an embodiment of the invention;
FIG. 6 is a schematic view of a brush roller according to an embodiment of the present invention.
In the figure: 1-base, 2-shell, 3-feed inlet, 4-first conveying roller, 5-first guide roller, 6-second guide roller, 7-third guide roller, 8-second conveying roller, 9-first conveying belt, 10-third conveying roller, 11-fourth guide roller, 12-fifth guide roller, 13-sixth guide roller, 14-fourth conveying roller, 15-second conveying belt, 16-first material guide plate, 17-second material guide plate, 18-third material guide plate, 19-collecting device, 191-first collecting hopper, 192-second collecting hopper, 193-third collecting hopper, 20-first motor, 21-first fan, 22-second fan, 23-second motor, 24-third motor, 25-first cam shaft, 26-second cam shaft, 27-third cam shaft, 28-fourth cam shaft, 29-brush roller, 30-through hole and 31-driving rod.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 2 to 6, the embodiment provides a post-treatment device for polyurethane granulation, which includes a base 1, and a casing 2 with a rectangular cross section is fixedly installed on the top of the base 1. The top surface of the shell 2 is provided with a feed inlet 3 parallel to the left and right side walls of the shell 2. A first conveying roller 4, a first guide roller 5, a second guide roller 6, a third guide roller 7 and a second conveying roller 8 are horizontally and rotatably matched between the front side wall and the rear side wall in the shell 2. The first conveying roller 4 is located on the left side below the feeding hole 3, the first guide roller 5 is located on the right side below the first conveying roller 4, the second guide roller 6 is located on the left side below the first guide roller 5, the third guide roller 7 is located on the right side below the second guide roller 6, and the second conveying roller 8 is located on the left side below the third guide roller 7. First conveying roller 4, first guide roll 5, second guide roll 6, third guide roll 7 and 8 lateral walls of second conveying roller normal running fit have first conveyer belt 9, have evenly seted up the sieve mesh on the first conveyer belt 9. A third conveying roller 10, a fourth guide roller 11, a fifth guide roller 12, a sixth guide roller 13 and a fourth conveying roller 14 are horizontally and rotatably fitted between the front and rear side walls inside the casing 2. The outer side walls of the third conveying roller 10, the fourth guide roller 11, the fifth guide roller 12, the sixth guide roller 13 and the fourth conveying roller 14 are rotatably matched with a second conveying belt 15. The second conveyer belt 15 is located inside the first conveyer belt 9 and is parallel to the first conveyer belt 9, sieve pores have been evenly seted up on the second conveyer belt 15, and the sieve pore area on the second conveyer belt 15 is less than the sieve pores on the first conveyer belt 9. In the actual production process, the proper mesh area is selected according to the volume size of the required screening.
A first material guide plate 16, a second material guide plate 17 and a third material guide plate 18 are fixedly arranged between the front side wall and the rear side wall inside the shell 2. The first guide plate 16 is positioned above the second conveyor belt 15 between the fourth guide roller 11 and the fifth guide roller 12 and below the second conveyor belt 15 between the third conveyor roller 10 and the fourth guide roller 11. The second guide plate 17 is positioned above the first conveyor belt 9 between the first guide roller 5 and the second guide roller 6 and below the second conveyor belt 15 between the fourth guide roller 11 and the fifth guide roller 12. The third guide plate 18 is positioned below the first conveyor belt 9 between the first guide roller 5 and the second guide roller 6 and above the first conveyor belt 9 between the second guide roller 6 and the third guide roller 7. Inside the housing 2 a collecting device 19 is arranged. The first material guiding plate 16 serves as a material guiding function, and prevents small-volume polyurethane particles screened out from passing through the second conveying belt 15 again to be mixed with medium-volume polyurethane particles. The second material guiding plate 17 plays a role of guiding materials on one hand, and on the other hand, small and medium-sized polyurethane particles screened out are prevented from passing through the first conveying belt 9 again to be mixed with large accumulated polyurethane particles.
In this embodiment, the collecting device 19 includes a first collecting bucket 191, a second collecting bucket 192, and a third collecting bucket 193 horizontally slidably mounted between the front and rear side walls of the housing 2. The first collecting hopper 191 is located below the third guide roller 7. The second collecting hopper 192 is located above the first conveyor belt 9 between the third guide roller 7 and the second conveyor roller 8 and below the second conveyor belt 15 between the sixth guide roller 13 and the fourth conveyor roller 14. The third collecting hopper 193 is positioned below the second conveyor belt 15 between the fifth guide roller 12 and the sixth guide roller 13.
In this embodiment, a first motor 20 is fixedly mounted on the rear side wall of the housing 2, and an output end of the first motor 20 is fixedly connected with the second conveying roller 8. The second conveyor roller 8 and the fourth conveyor roller 14 are connected by a belt. Drive second conveying roller 8 through first motor 20 and rotate to drive the motion of first conveyer belt 9, drive fourth conveying roller 14 when second conveying roller 8 pivoted and rotate, thereby drive the motion of second conveyer belt 15.
In this embodiment, the front and rear side walls of the housing 2 are symmetrically and fixedly provided with a first fan 21 and a second fan 22. The first fan 21 and the first guide roller 5 are located on the same horizontal plane, and the second fan 22 and the third guide roller 7 are located on the same horizontal plane. The first fan 21 and the second fan 22 blow air to the polyurethane particles in the housing 2, so that heat emitted from the polyurethane particles is dissipated, and cooling of the polyurethane particles is accelerated.
In this embodiment, a second motor 23 and a third motor 24 are fixedly mounted on the front side wall of the housing 2, an output end of the second motor 23 is fixedly connected with a first cam shaft 25, and an output end of the third motor 24 is fixedly connected with a second cam shaft 26. The first cam shaft 25 is in surface contact with the upper surface of the first conveying belt 9 between the first conveying roller 4 and the first guide roller 5, and the second cam shaft 26 is in surface contact with the upper surface of the first conveying belt 9 between the second guide roller 6 and the third guide roller 7. Drive first camshaft 25 through second motor 23 and rotate to beat the vibration to first conveyer belt 9 of one-level screening in-process, play the effect of refining to the polyurethane granule on first conveyer belt 9, improve the effect of one-level screening. Drive second camshaft 26 through third motor 24 and rotate to beat the vibration to the first conveyer belt 9 of second grade screening in-process, play the effect of refining to the polyurethane granule on the first conveyer belt 9, improve the effect of second grade screening.
In the present embodiment, a third cam shaft 27 and a fourth cam shaft 28 are rotatably mounted between the front and rear side walls of the housing 2. The first camshaft 25 is connected to the third camshaft 27 and the second camshaft 26 is connected to the fourth camshaft 28 by drive belts. The third cam shaft 27 is engaged with the lower surface of the second conveying belt 15 between the third conveying roller 10 and the fourth guide roller 11, and the fourth cam shaft 28 is engaged with the lower surface of the second conveying belt 15 between the fifth guide roller 12 and the sixth guide roller 13. Drive third camshaft 27 through first camshaft 25 and rotate to beat the vibration to the second conveyer belt 15 of one-level screening in-process, play the effect of refining to the polyurethane granule on the second conveyer belt 15, improve the effect of one-level screening. Drive fourth camshaft 28 through second camshaft 26 and rotate to beat the vibration to the second conveyer belt 15 of second grade screening in-process, play the effect of refining to the polyurethane granule on the second conveyer belt 15, improve the effect of second grade screening.
In this embodiment, a plurality of brush rollers 29 are rotatably mounted between the front and rear side walls of the housing 2. The brush rollers 29 are respectively positioned above the first guide roller 5, the second guide roller 6, the third guide roller 7, the fourth guide roller 11, the fifth guide roller 12, and the sixth guide roller 13, and are respectively in contact with the lower surface of the first conveyor belt 9 or the lower surface of the second conveyor belt 15. In the process of movement of the first conveyer belt 9 and the second conveyer belt 15, the bristles of the brush roller 29 clean the polyurethane particles attached to the surfaces of the first conveyer belt 9 and the second conveyer belt 15, so that the polyurethane particles are prevented from being squeezed between the conveyer belts and the guide rollers, and the transportation stability is improved.
In this embodiment, the first conveyor belt 9 and the second conveyor belt 15 have through holes 30 formed at their side edges. The outer surface of the brush roller 29 is fixedly provided with a driving rod 31 which is matched with the through hole 30. In the moving process of the first conveying belt 9 and the second conveying belt 15, the through holes 30 and the transmission rods 31 are in a matched state, so that the brush roller 29 can be driven to rotate, centrifugal force is generated in the rotating process of the brush roller 29, polyurethane particles attached to bristles are thrown out and fall onto a guide plate or a conveying belt below the brush roller, the polyurethane particles are prevented from being accumulated on the brush roller 29, and the cleaning efficiency of the brush roller 29 is improved.
As shown in fig. 1, this embodiment provides a post-treatment process for extrusion granulation of general-purpose plastic polyurethane, which includes the following steps:
step one, primary screening: polyurethane particles are thrown into the housing 2 from the feed opening 3, and the polyurethane particles fall down onto the upper surface of the first conveyor belt 9 between the first conveyor roller 4 and the first guide roller 5. The large-volume polyurethane particles are left above the first conveying belt 9 and slide down to the third material guide plate 18 along with the first conveying belt 9, and a part of the medium-volume and small-volume polyurethane particles pass through the first conveying belt 9 and fall to the upper surface of the second conveying belt 15 between the third conveying roller 10 and the fourth guide roller 11; a part of the small-volume polyurethane particles fall through the second conveyor belt 15 onto the first material guide plate 16, and the medium-volume polyurethane particles remain above the second conveyor belt 15 and slide down together with the second conveyor belt 15 onto the second material guide plate 17. The small polyurethane particles on the first guide plate 16 fall into the collecting device 19, so that the primary screening is completed.
Step two, secondary screening: the polyurethane particles on the third material guide plate 18 slide down to the upper surface of the first conveyor belt 9 between the second guide roller 6 and the third guide roller 7, and the large-volume polyurethane particles are left above the first conveyor belt 9 and slide down to the collecting device 19 along with the first conveyor belt 9. The residual polyurethane particles with small and medium volume fall to the upper surface of the second conveying belt 15 between the fifth guide roller 12 and the sixth guide roller 13 through the first conveying belt 9, the polyurethane particles with medium volume remain above the second conveying belt 15 and slide down to the collecting device 19 along with the second conveying belt 15, and the polyurethane particles with small volume fall to the collecting device 19 through the second conveying belt 15, so that secondary screening is completed.
Step three, classified collection: the polyurethane particles after two-stage screening are collected by a collecting device 19 according to the large, medium and small types of the volume. The large accumulated polyurethane particles fall into the first collecting hopper 191 after sliding on the first conveyor belt 9, the medium accumulated polyurethane particles fall into the second collecting hopper 192 after sliding on the second conveyor belt 15, a part of the small accumulated polyurethane particles fall into the third collecting hopper 193 from the first material guide plate 16, and the other part of the small accumulated polyurethane particles fall into the third collecting hopper 193 after secondary screening through the second conveyor belt 15.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A post-treatment process for extrusion granulation of general polyurethane plastic is characterized by comprising the following steps: the post-treatment process for the extrusion granulation of the polyurethane general plastic is completed by matching a post-treatment device for the granulation of the polyurethane, wherein the post-treatment device for the granulation of the polyurethane comprises a base (1), and a shell (2) with a rectangular cross section is fixedly arranged at the top of the base (1); the top surface of the shell (2) is provided with a feed inlet (3) which is parallel to the left and right side walls of the shell (2); a first conveying roller (4), a first guide roller (5), a second guide roller (6), a third guide roller (7) and a second conveying roller (8) are horizontally and rotatably matched between the front side wall and the rear side wall in the shell (2); the first conveying roller (4) is positioned on the left side below the feeding hole (3), the first guide roller (5) is positioned on the right side below the first conveying roller (4), the second guide roller (6) is positioned on the left side below the first guide roller (5), the third guide roller (7) is positioned on the right side below the second guide roller (6), and the second conveying roller (8) is positioned on the left side below the third guide roller (7); the outer side walls of the first conveying roller (4), the first guide roller (5), the second guide roller (6), the third guide roller (7) and the second conveying roller (8) are rotatably matched with a first conveying belt (9), and sieve holes are uniformly formed in the first conveying belt (9); a third conveying roller (10), a fourth guide roller (11), a fifth guide roller (12), a sixth guide roller (13) and a fourth conveying roller (14) are horizontally matched between the front side wall and the rear side wall in the shell (2) in a rotating way; a second conveying belt (15) is rotatably matched on the outer side walls of the third conveying roller (10), the fourth guide roller (11), the fifth guide roller (12), the sixth guide roller (13) and the fourth conveying roller (14); the second conveying belt (15) is positioned inside the first conveying belt (9) and is parallel to the first conveying belt (9), sieve holes are uniformly formed in the second conveying belt (15), and the area of the sieve holes in the second conveying belt (15) is smaller than that of the sieve holes in the first conveying belt (9);
a first material guide plate (16), a second material guide plate (17) and a third material guide plate (18) are fixedly arranged between the front side wall and the rear side wall inside the shell (2); the first material guide plate (16) is positioned above the second conveying belt (15) between the fourth guide roller (11) and the fifth guide roller (12) and is positioned below the second conveying belt (15) between the third conveying roller (10) and the fourth guide roller (11); the second material guide plate (17) is positioned above the first conveying belt (9) between the first guide roller (5) and the second guide roller (6) and below the second conveying belt (15) between the fourth guide roller (11) and the fifth guide roller (12); the third material guide plate (18) is positioned below the first conveying belt (9) between the first guide roller (5) and the second guide roller (6) and above the first conveying belt (9) between the second guide roller (6) and the third guide roller (7); a collecting device (19) is arranged in the shell (2);
the post-treatment process for extruding and granulating the universal polyurethane plastic comprises the following steps:
step one, primary screening: polyurethane particles are thrown into the shell (2) from the feed inlet (3), and are subjected to primary screening through a first conveying belt (9) between a first conveying roller (4) and a first guide roller (5) and a second conveying belt (15) between a third conveying roller (10) and a fourth guide roller (11);
step two, secondary screening: the polyurethane particles after primary screening are subjected to secondary screening through a first conveying belt (9) between a second guide roller (6) and a third guide roller (7) and a second conveying belt (15) between a fifth guide roller (12) and a sixth guide roller (13);
step three, classified collection: and collecting the polyurethane particles subjected to two-stage screening according to three types of large, medium and small volumes by a collecting device (19).
2. The extrusion granulation post-treatment process of the polyurethane general plastic as claimed in claim 1, wherein the post-treatment process comprises the following steps: in the polyurethane granulation post-treatment device, a collecting device (19) comprises a first collecting hopper (191), a second collecting hopper (192) and a third collecting hopper (193) which are horizontally and slidably arranged between the front side wall and the rear side wall of a shell (2); the first collecting hopper (191) is positioned below the third guide roller (7); the second collecting hopper (192) is positioned above the first conveying belt (9) between the third guide roller (7) and the second conveying roller (8) and below the second conveying belt (15) between the sixth guide roller (13) and the fourth conveying roller (14); the third collecting hopper (193) is positioned below the second conveyor belt (15) between the fifth guide roller (12) and the sixth guide roller (13).
3. The extrusion granulation post-treatment process of the polyurethane general plastic as claimed in claim 1, wherein the post-treatment process comprises the following steps: in the polyurethane granulation post-treatment device, a first motor (20) is fixedly mounted on the rear side wall of a shell (2), and the output end of the first motor (20) is fixedly connected with a second conveying roller (8); the second conveying roller (8) and the fourth conveying roller (14) are connected through a transmission belt.
4. The extrusion granulation post-treatment process of the polyurethane general plastic as claimed in claim 1, wherein the post-treatment process comprises the following steps: in the polyurethane granulation post-treatment device, a first fan (21) and a second fan (22) are symmetrically and fixedly arranged on the front side wall and the rear side wall of a shell (2); the first fan (21) and the first guide roller (5) are positioned on the same horizontal plane, and the second fan (22) and the third guide roller (7) are positioned on the same horizontal plane.
5. The extrusion granulation post-treatment process of the polyurethane general plastic as claimed in claim 1, wherein the post-treatment process comprises the following steps: in the polyurethane granulation post-treatment device, a second motor (23) and a third motor (24) are fixedly mounted on the front side wall of a shell (2), the output end of the second motor (23) is fixedly connected with a first cam shaft (25), and the output end of the third motor (24) is fixedly connected with a second cam shaft (26); the first cam shaft (25) is in surface contact with the upper surface of the first conveying belt (9) between the first conveying roller (4) and the first guide roller (5), and the second cam shaft (26) is in surface contact with the upper surface of the first conveying belt (9) between the second guide roller (6) and the third guide roller (7).
6. The extrusion granulation post-treatment process of the polyurethane general plastic as claimed in claim 5, wherein the post-treatment process comprises the following steps: in the polyurethane granulation post-treatment device, a third cam shaft (27) and a fourth cam shaft (28) are rotatably arranged between the front side wall and the rear side wall of a shell (2); the first camshaft (25) and the third camshaft (27) and the second camshaft (26) and the fourth camshaft (28) are connected through transmission belts; the third cam shaft (27) is matched with the lower surface of the second conveying belt (15) between the third conveying roller (10) and the fourth guide roller (11), and the fourth cam shaft (28) is matched with the lower surface of the second conveying belt (15) between the fifth guide roller (12) and the sixth guide roller (13).
7. The extrusion granulation post-treatment process of the polyurethane general plastic as claimed in claim 1, wherein the post-treatment process comprises the following steps: in the polyurethane granulation post-treatment device, a plurality of brush rollers (29) are rotatably arranged between the front side wall and the rear side wall of a shell (2); the brush rollers (29) are respectively positioned above the first guide roller (5), the second guide roller (6), the third guide roller (7), the fourth guide roller (11), the fifth guide roller (12) and the sixth guide roller (13) and are respectively contacted with the lower surface of the first conveying belt (9) or the lower surface of the second conveying belt (15).
8. The extrusion granulation post-treatment process of the polyurethane general plastic as claimed in claim 7, wherein the post-treatment process comprises the following steps: in the polyurethane granulation post-treatment device, through holes (30) are formed in the side edges of a first conveying belt (9) and a second conveying belt (15); the outer surface of the brush roller (29) is fixedly provided with a driving rod (31) which is matched with the through hole (30).
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Effective date of registration: 20210706 Address after: 163000 4-5-4, North Building Materials City, Ranghulu District, Daqing City, Heilongjiang Province Applicant after: Yinlai Lidong (Daqing) Technology Co.,Ltd. Address before: 325200 Zhejiang Lingxin Polyurethane Co., Ltd., International Auto Parts Industrial Zone, Tangxia Town, Ruian City, Wenzhou City, Zhejiang Province Applicant before: Zhang Liangqin |
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