KR102095745B1 - Sorting apparatus for recycled plastic pellet - Google Patents

Abstract

The present invention relates to a recycling plastic pellet sorting device, and more specifically, it is possible to remove dust or metal or other foreign substances attached to the recycled plastic pellet in one sorting process, and simplify the configuration to reduce the manufacturing cost by miniaturizing the device. And it relates to a recycling plastic pellet sorting device that can reduce the installation space.

Description

Sorting apparatus for recycled plastic pellets

The present invention relates to a recycling plastic pellet sorting device, and more specifically, it is possible to remove dust or metal or other foreign substances attached to the recycled plastic pellet in one sorting process, and simplify the configuration to reduce the manufacturing cost by miniaturizing the device. And it relates to a recycling plastic pellet sorting device that can reduce the installation space.

Generally, for plastic injection molding or extrusion molding, pellets, which are synthetic resin raw materials, are used.

Pellets are continuously made of dust due to friction and impact during processing or transportation, and dust is easily attached due to static electricity, so it is very difficult to maintain the purity of synthetic resin raw materials.

Such dust and foreign substances may include fine dust such as external dust, wrapping paper dust and thread, as well as resin powder in powder form, raw materials broken in chip form, metal, etc., and use a molding machine as pellets containing such dust and foreign matter. Therefore, when manufacturing a product, there is a problem that a defect may occur in the product.

Recently, in order to solve such a problem, Korean Patent Registration No. 10-1745296 proposed a dust removal device for synthetic water support fee of a duct structure.

The synthetic resin support dust removal device is quantitatively supplied while the synthetic resin raw material supplied from the raw material supply unit passes through the input control means, and the supplied synthetic resin raw material is removed static electricity while passing through the static electricity removal means, and the synthetic resin raw material falls to the inclined plate at the same time Dust is collected in a dust collecting container through a transfer pipe, and in this case, air is discharged to the outside through an air filtration pipe.

However, in the conventional synthetic water support material dust removal device, the internal structure of the removal device for removing dust is complicated, and not only the manufacturing cost rises, but also the vacuum efficiency of the dust removal device is low, so it is not possible to effectively separate the dust. There is a problem in that the air is contaminated and the working environment is poor.

In addition, since the dust removal device and the dust collecting part are separately configured, a certain space is required at the time of installation, so it is difficult to miniaturize the product and thus the space utilization is poor.

Republic of Korea Registered Patent 10-1679700 Republic of Korea Registered Patent 10-1657493 Republic of Korea Patent Publication 10-2005-0026258

The present invention is to solve the conventional problems as described above, while transporting the recycled plastic pellets in a sealed and airtight state, it is possible to remove the dust or metal or other foreign matter attached to the recycled plastic pellets in a single screening process. The object of the present invention is to provide a recycling plastic pellet sorting device that can reduce manufacturing cost and installation space by simplifying the device.

Recycling plastic pellet sorting apparatus according to the present invention for achieving the above object is an input hopper to which the recycled plastic pellets are introduced; A transport conveyor disposed below the input hopper and transporting pellets inputted through the input hopper from one side to the other, and having an adsorption belt that adsorbs dust and dust adhering to the pellets during transport of the pellets; A metal detecting unit installed on the conveying conveyor to detect metal material from pellets conveyed along the conveying conveyor; A transfer hopper for guiding and discharging regenerated plastic pellets falling from the other end of the transfer conveyor downward; A discharge duct installed to extend outward from one side of the transfer hopper adjacent to the damper; It is installed in the transfer hopper to keep the flow path of the transfer hopper open normally, and when a metal material is detected by the metal detection unit, the pellets introduced into the transfer hopper are discharged through the discharge duct. A damper closing the flow path; A sorting unit for receiving pellets guided and discharged downward through the delivery hopper and sorting and discharging pellets according to a set size; It characterized in that it comprises; a vibration generating unit for generating a vibration in the sorting unit so that the pellets introduced into the sorting unit can move along the longitudinal direction of the sorting unit.

The sorting unit is disposed under the transfer hopper, a housing having a space formed therein, and installed in the housing, so that pellets having a predetermined size or smaller among recycled plastic pellets discharged from the transfer hopper can be passed downward. A plurality of first sorting holes penetrating up and down are formed, and at least one first sorting tray disposed spaced apart vertically, and below the first sorting tray spaced apart from the first sorting tray in the housing. A second separating tray having a plurality of second separating holes penetrating up and down so as to allow a pellet having a smaller than a predetermined reference size to pass downward among pellets passing through the first separating tray, and inside the housing It is installed on one side end side in the longitudinal direction of the first lane selection tray of the screening by the first lane selection tray A partition plate for partitioning pellets exceeding a standard and pellets corresponding to a reference size selected by the second lane sorting tray through different outlets, and supporting the housing against the ground, and vibrating the vibration It characterized in that it comprises a support for buffering the vibration generated in the housing by the generating unit.

An end portion is in contact with the outer circumferential surface of the suction belt of the conveyer conveyor to remove dust and debris attached to the adsorption belt, and to remove dust and debris from the adsorption belt by a removing unit. It characterized in that it further comprises a foreign material discharge portion for discharging to the outside.

The recycled plastic pellet sorting apparatus according to the present invention can remove dust or metal or other foreign substances attached to the recycled plastic pellets in a single sorting process while transferring the recycled plastic pellets in a sealed and airtight state, and simplifies the configuration of the apparatus. It has the advantage of reducing manufacturing cost and installation space through miniaturization.

1 is a perspective view of a recycling plastic pellet sorting apparatus according to the present invention.
Figure 2 is a perspective view of a recycling plastic pellet sorting apparatus according to the present invention.
3 is an exploded perspective view of a recycling plastic pellet sorting apparatus according to the present invention.
Figure 4 is a partial cross-sectional view of the recycling plastic pellet sorting apparatus according to the present invention.
Figure 5 is a cross-sectional view of the recycling plastic pellet sorting apparatus according to the present invention.

Hereinafter, a recycling plastic pellet sorting apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 shows a recycling plastic pellet sorting device 1 according to the present invention. 1 to 5, the recycling plastic pellet sorting apparatus 1 according to the present invention includes an input hopper 10, a transport conveyor 20, a metal detecting unit 30, and a transfer hopper 40. , A discharge duct 50, a damper 60, a sorting unit 70, a vibration generating unit 80 and a control unit.

The input hopper 10 is provided with a wide upper portion and a narrow lower portion so that recycled plastic pellets can be introduced, and upper and lower portions are opened, and an accommodation space portion is formed inside the pellet so that the pellets can be received and passed.

The transport conveyor 20 is disposed in the horizontal direction at the bottom of the input hopper 10, transfers the pellets input through the input hopper 10 from one side to the other side, dust and dust attached to the pellets during the transfer of the pellets It includes an adsorption belt 21 for adsorbing and a transfer driving unit for rotating the adsorption belt 21 in an infinite track.

The adsorption belt 21 is made of a material such as rubber, urethane, or silicon, and is rotated in a caterpillar by a transfer driving unit. Although not shown, an adsorption hole may be further formed on the surface of the adsorption belt 21, and in this case, the adsorption hole may be formed in a circular shape.

The transfer drive unit includes a drive roller unit 22, a driven roller unit 23, and a transfer drive motor (not shown) for rotating the drive roller.

The transport conveyor 20 is further provided with a sealing casing 25 on the outside to prevent external dust or foreign substances from adhering to the pellet transported along the adsorption belt 21 and to surround the transport conveyor 20.

The metal detecting unit 30 is installed on the conveying conveyor 20 so as to detect metal substances from pellets conveyed along the conveying conveyor 20, and is included in the pellet conveyed along the conveying conveyor 20 by an electromagnetic induction method or the like. Metal material is detected. The metal detection unit 30 may apply a device to which a conventional metal detection method is applied. The metal detection unit 30 is connected to the control unit and transmits metal detection information to the control unit when it is detected that metal is present.

The transfer hopper 40 guides and discharges the recycled plastic pellets downwardly transferred from one side of the transfer conveyor 20 to the other side and falling from the other end, and the upper portion is formed in a wide structure and the lower portion in a narrow structure. A space portion is formed to receive and pass pellets falling from the conveyer 20.

And, one side of the transfer hopper 40 is provided with a discharge duct 50 that communicates with the space.

The discharge duct 50 is installed to extend outward from one side of the transfer hopper 40 adjacent to the damper 60. The discharge duct 50 discharges the pellets input to the delivery hopper 40 to the outside of the delivery hopper 40 when the damper 60 is rotated to one side to close the flow path of the discharge duct 50.

The damper 60 is installed in the transfer hopper 40, and normally maintains a state rotated in the vertical direction to keep the flow path of the transfer hopper 40 open, and a metal substance to be detected by the metal detection unit 30 At the time, the flow path of the transfer hopper 40 is closed so that the pellets introduced into the transfer hopper 40 are discharged to the discharge duct 50 by maintaining the state rotated in the horizontal direction. Operation of the damper 60 is controlled by a control unit described later. The damper 60 is set by the control unit to close the induction of the transfer hopper 40 until a certain time or a time when the metal is not detected after the metal is detected by the metal detecting unit 30.

The sorting unit 70 receives the pellets guided and discharged downward through the transfer hopper 40 and sorts and discharges the pellets according to a set size, and includes a housing 170 and a first lane sorting tray 270, It comprises a second lane sorting tray 370, a partition plate 470, and a support 570.

The housing 170 is disposed under the transfer hopper 40, a space is formed inside, and is formed in a square box shape.

The bottom portion of the housing 170 is formed to be inclined downward toward the other side facing the transfer hopper 40 from one side facing the transfer hopper 40, and finally selected downward through the first selection tray and the second selection tray. It is formed to collect the pellets under the standard size on the other side and discharge them to the outside.

A bottom outlet 170A of the housing 170 is provided by a first outlet 171 through which pellets of a reference size or larger selected by the first lane sorting tray 270, which will be described later, are discharged, and a second lane sorting tray 370. The second outlet 172 through which the pellets corresponding to the selected reference size are discharged, and the third outlet 173 through which the pellets below the reference size are discharged through both the first and second sorting trays 370 are discharged. Is formed.

In FIG. 3, reference numeral 270B is a cover that closes the upper portion of the housing 170.

The first lane discrimination tray 270 is installed in the housing 170, and a plurality of agents penetrating up and down so as to allow the pellets below a set reference size among the recycled plastic pellets discharged from the transfer hopper 40 to pass downward. One sorting hole 270A is formed. The first lane selection tray 270 may be composed of at least one or more trays spaced apart vertically.

In the present embodiment, the first lane sorting tray 270 is a first lower sorting tray 272 disposed at a predetermined height below the first upper sorting tray 271 and the first upper sorting tray 271. It is configured to include. The first upper sorting tray 271 and the first lower sorting tray 272 are formed with the same size and structure.

In the illustrated example, the first lane sorting tray 270 is composed of two first tier upper sorting trays 271 and the first tier lower sorting tray 272, but it is of course possible to apply more than that. .

The first upper upper sorting tray 271 and the first lower sorting tray 272 each extend upwardly from both edges of the sorting plate and the sorting plate in which the first sorting hole 270A is formed, and the upper side of the sorting plate. It is configured to include a flange portion that is coupled to engage the top of the side wall. In this case, the flange portion of the first lower sorting tray 272 is formed longer than the flange portion of the first upper sorting tray 271 so that the sorting plate of the first lower sorting tray 272 is the first upper sorting tray 271 It is preferable to place it at a position lower than the sorting plate of).

The first sorting holes 270A respectively formed in the first upper sorting tray 271 and the first lower sorting tray 272 are larger than the standard size so that pellets larger than a normal product standard, that is, a set standard size, can be selected. It is formed slightly larger and has a circular shape. On the first screening tray 270, only pellets larger than the size of a normal product remain.

The second lane sorting tray 370 is installed under the first lane sorting tray 270 spaced apart from the first lane sorting tray 270 in the housing 170, and passes through the first lane sorting tray 270. Among them, a plurality of second sorting holes 370A penetrating up and down are formed so as to allow the pellets having a predetermined size or less to pass downward.

The second sorting tray 370 is formed in the form of a mesh network in which the second sorting holes 370A are formed, and is opposite to the transfer hopper 40 on one side facing the transfer hopper 40 inside the housing 170. It is installed inclined downward to the other side. The second sorting hole 370A formed in the second sorting tray 370 is formed in the same size as the set reference size, which is a normal product standard of the pellet, and is formed in a circular shape. The second sorting hole 370A of the second sorting tray 370 passes only pellets that do not meet the reference size.

The partition plate 470 is installed in the vertical direction on one end side of the longitudinal direction of the first lane sorting tray 270 inside the housing 170 to exceed the criteria selected by the first lane sorting tray 270. The space portion of the housing 170 is partitioned so that the pellets corresponding to the reference size selected by the pellets and the second lane sorting tray 370 are discharged through different outlets 171, 172, and 173, respectively.

The support 570 includes a support frame 571 supporting the housing 170 with respect to the ground, and a support frame 571 and a housing 170 so as to buffer vibrations generated in the housing 170 by the vibration generating unit 80. It includes a buffer portion 575 installed between.

The support frame 571 includes a bottom frame 572 formed in a square shape and a vertical frame 573 extending upwardly from the four corners of the bottom frame 572, respectively. On the upper end of the vertical frame 573, a mounting plate 574 for installing the buffer 575 is provided.

The shock absorber 575 is a fixed rod 576 fixed to the mounting plate 574, one end is supported on the fixed rod 576 side, the other end is extended upward and the mounting flange provided in the housing 170 It comprises a spring member (577) supported on (175).

The vibration generating unit 80 generates vibration in the sorting unit 70 so that the pellets introduced into the sorting unit 70 can move along the longitudinal direction of the sorting unit 70, and a motor that generates vibration (not shown) And, it is provided with a mounting plate 82 for mounting the motor to the housing 170. The mounting plate 82 is fixed to the bottom surface of the housing 170 and the motor is installed to be fixed to the mounting plate 82.

On the other hand, the recycling plastic pellet sorting device (1) has an end portion in contact with the outer circumferential surface of the adsorption belt (21) of the transport conveyor (20), and a removal part including a blade for removing dust and foreign substances attached to the adsorption belt (21), A foreign material discharge unit 90 for sucking dust and foreign substances separated from the suction belt 21 by the removal unit and discharging them to the outside may be further provided.

As shown in the drawing, the foreign material discharge unit is installed on the transfer conveyor 20 between the input hopper 10 and the metal sensing unit 30 and can be installed in communication with the casing 25 sealing the transfer conveyor 20.

The control unit controls the operation of the motor, the transport conveyor 20 and the damper 60, respectively, and supports a manual mode so that the motor, the transport conveyor 20 and the damper 60 can be manually operated by the user. In addition, it supports an automatic mode so that the operation of the motor, transfer conveyor 20, and damper 60 can be automatically operated.

Hereinafter, the operation and function of the recycled plastic pellet sorting apparatus 1 according to the present invention having the above-described configuration will be described.

First, when the pellet to be sorted is input to the input hopper 10, the conveying conveyor 20 transfers the pellet to one side, and the suction belt 21 of the conveying conveyor 20 while the pellet is being moved along the conveying conveyor 20 ) Removes dust or foreign substances adhering to the pellets. When the metal is detected by the metal detecting unit 30 while pellets are being transported along the transport conveyor 20, the control unit rotates the damper 60 to one side to close the flow path of the transfer hopper 40, thereby containing pellets containing metal. Is discharged to the outside through the discharge duct 50. At this time, the operation of the transport conveyor 20 continues to operate.

If the metal is not detected by the metal detecting unit 30, the control unit rotates the damper 60 back to its original position, that is, rotates in the direction of opening the flow path of the transfer hopper 40, and sorts through the transfer hopper 40. The pellets can be introduced into the unit 70.

The pellets introduced into the sorting unit 70 are moved from one side to the other along the longitudinal direction of the housing 170 by vibrations generated from the vibration generating unit 80, and the first lane selection tray 270 and It is classified into a suitable product and a non-conforming product by the second sorting tray 370.

Pellets having a size larger than a suitable product in the housing 170 are sorted through the first sorting tray 270 and discharged to the first outlet 171 of the housing 170, and the suitable product is the second sorting tray 370 ) Is discharged to the second outlet 172 of the housing 170, and pellets smaller in size than suitable products are discharged to the third outlet 173 of the housing 170.

The recycled plastic pellet sorting device 1 according to the present invention as described above is a dust, dust, metal and other attached to the recycled plastic pellet while transporting the recycled plastic pellet in a sealed and airtight state through the conveyer 20. Not only can foreign substances be removed through a single process, but the selection of suitable and non-conforming products by size can be implemented in a single process, which simplifies the configuration and reduces manufacturing cost and installation space by miniaturizing the device.

The recycled plastic pellet sorting apparatus according to the present invention described above has been described with reference to the accompanying drawings, but this is only exemplary, and a person having ordinary knowledge in the art can perform various modifications and other equivalent embodiments therefrom. You will understand.

Accordingly, the scope of true technical protection of the present invention should be defined only by the technical spirit of the appended claims.

1: sorting device
10: input hopper
20: Transfer conveyor
30: metal detection unit
40: delivery hopper
50: discharge duct
60: damper
70: sorting unit
170: housing
270: 1st screening tray
370: 2nd screening tray
470: partition plate
80: vibration generating unit
90: foreign matter discharge unit

Claims (3)

An input hopper into which recycled plastic pellets are introduced;
A transport conveyor disposed below the input hopper and transporting pellets inputted through the input hopper from one side to the other, and having an adsorption belt that adsorbs dust and dust adhering to the pellets during transport of the pellets;
A metal detecting unit installed on the conveying conveyor to detect metal material from pellets conveyed along the conveying conveyor;
A transfer hopper for guiding and discharging regenerated plastic pellets falling from the other end of the transfer conveyor downward;
A discharge duct installed to extend outward from one side of the transfer hopper adjacent to the damper;
It is installed in the transfer hopper to keep the flow path of the transfer hopper open normally, and when a metal material is detected by the metal detection unit, the pellets introduced into the transfer hopper are discharged through the discharge duct. A damper closing the flow path;
A sorting unit for receiving pellets guided and discharged downward through the delivery hopper and sorting and discharging pellets according to a set size;
It is provided with a vibration generating unit for generating a vibration in the sorting unit so that the pellets introduced into the sorting unit can move along the longitudinal direction of the sorting unit,
Recycling plastic pellet sorting device, characterized in that the outer side of the transport conveyor is further provided with a sealing casing surrounding the transport conveyor so as to prevent external dust or foreign matter from adhering to the pellet transported along the adsorption belt.
According to claim 1,
The sorting unit
A housing disposed under the transfer hopper and having a space formed therein,
Among the recycled plastic pellets discharged from the transfer hopper, a plurality of first sorting holes penetrating the top and bottom are formed so as to allow the pellets having a predetermined size or less to pass downward, and are disposed spaced apart from each other vertically. At least one first lane selection tray,
In the housing, the first lane selection tray is installed below the first lane selection tray to be spaced apart from the first lane selection tray. A second sorting tray having a plurality of second sorting holes penetrating;
Pellets exceeding the criteria selected by the first lane selection tray and the reference sizes selected by the second lane selection tray, which are installed at one end side in the longitudinal direction of the first lane selection tray inside the housing. A partition plate for partitioning the corresponding pellets through different outlets,
Recycling plastic pellet sorting device, characterized in that it comprises a support for supporting the housing against the ground, and cushioning the vibration generated in the housing by the vibration generating unit.
According to claim 1,
And an end portion in contact with the outer circumferential surface of the adsorption belt of the conveying conveyor, a removal unit including a blade for removing dust and foreign substances attached to the adsorption belt,
A recycling plastic pellet sorting device further comprising a foreign material discharge part that sucks out dust and foreign substances separated from the suction belt by the removal part and discharges them to the outside.

Images