CN216260265U

CN216260265U - Automatic proportioning device suitable for regenerated polyethylene modification

Info

Publication number: CN216260265U
Application number: CN202122878935.8U
Authority: CN
Inventors: 何海博; 苏俊业; 王斌; 陈雄
Original assignee: Cgn Tuopu Sichuan New Material Co ltd
Current assignee: Cgn Tuopu Sichuan New Material Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-04-12
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses an automatic proportioning device suitable for modification of regenerated polyethylene, which comprises a plurality of raw material tanks, an automatic metering device, a mixing device and a PLC (programmable logic controller); a plurality of raw material tanks are arranged in parallel, and a first screw conveyor is arranged below the raw material tanks; the discharge end of the automatic metering device is communicated with the feed end of the mixing device, and a first valve is arranged at the discharge end of the automatic metering device; a second valve and a second screw conveyor are arranged at the discharge end of the mixing device; the automatic proportioning device also comprises a moving device for driving the automatic metering device and the mixing device to move along the arrangement direction of the raw material tanks; a metering scale is arranged in the automatic metering device, and a gravity sensor is arranged below the metering scale; the first screw conveyor, the second screw conveyor, the first valve, the second valve and the gravity sensor are electrically connected with the PLC; the utility model reduces the equipment input amount, increases the selectivity of the raw materials, and realizes the accurate material selection and flexible proportioning of the raw materials.

Description

Automatic proportioning device suitable for regenerated polyethylene modification

Technical Field

The utility model relates to the technical field of regenerated polyethylene modification equipment, in particular to an automatic proportioning device suitable for regenerated polyethylene modification.

Background

Recycling of recycled plastics often requires recycling modifications. The main process of recycling and modifying the polyethylene plastic is as follows: the recycled plastic is subjected to preliminary treatment processes such as crushing, cleaning, impurity removal and the like, and then is gathered in the form of fragments or particles to be used as modified raw materials, then each raw material is metered, homogenized and stirred, and finally the mixture is transferred to an extruder to be extruded and molded to obtain a modified product. Wherein, measurement, compounding process can be realized through automatic proportioning device at present.

Referring to fig. 1, in a conventional automatic proportioning device, generally, one raw material tank 1 corresponds to one automatic metering device 3, and the raw materials involved in the modified process of the recycled polyethylene are various, so that a large number of automatic metering devices 3 are required to be used. Because of differences among original recycled materials, in order to enable a target product to meet the performance index requirements, multiple formulas are often required to be set, namely different types of raw materials are screened and combined and the proportion among the raw materials is changed, and in actual production, some formulas only need part of types of raw materials and all raw materials do not need to be weighed; therefore, the traditional arrangement mode has the problems that the types of raw materials can not be selected, the input amount of the automatic metering device is large, the utilization rate is low, the equipment maintenance cost is high and the like.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to an automatic proportioning device for reclaimed polyethylene modification, which solves the above problems of the prior art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the automatic proportioning device suitable for the modification of the regenerated polyethylene comprises a plurality of raw material tanks, an automatic metering device, a mixing device and a PLC (programmable logic controller); the raw material tanks are arranged in parallel, each raw material tank correspondingly stores one raw material, and all the raw material tanks share one automatic metering device; a first screw conveyor for conveying the materials from the raw material tank to the automatic metering device is arranged below the raw material tank; the discharge end of the automatic metering device is communicated with the feed end of the mixing device, and the discharge end of the automatic metering device is also provided with a first valve for controlling discharge; the discharge end of the mixing device is provided with a second valve for controlling discharge and a second screw conveyor for feeding materials into the extruder; the automatic proportioning device also comprises a moving device for driving the automatic metering device and the mixing device to move along the arrangement direction of the raw material tanks; a metering scale used for weighing materials is arranged in the automatic metering device, and a gravity sensor is arranged below the metering scale; and the first screw conveyor, the second screw conveyor, the first valve, the second valve and the gravity sensor are all electrically connected with the PLC.

The moving device comprises a guide rail, a lead screw and a first motor for driving the lead screw to rotate, and the first motor is electrically connected with the PLC; a screw nut capable of reciprocating along the screw is arranged on the screw; the lead screw nut is fixed on the automatic metering device, a sliding block is fixedly arranged on the automatic metering device, and the sliding block is connected with the guide rail in a sliding mode.

One side of the automatic metering device is provided with a fan used for blowing materials into the mixing device, and the fan is electrically connected with the PLC.

And the air outlet of the fan is provided with a filter screen.

The mixing device is internally provided with a stirring shaft and a second motor for driving the stirring shaft to rotate, and the second motor is electrically connected with the PLC; and the stirring shaft is provided with stirring blades.

The feeding end of the automatic metering device and the discharging end of the first screw conveyer are both provided with position sensors, and the position sensors are electrically connected with the PLC.

The utility model has the beneficial effects that:

1. the movable automatic metering device and the material mixing device are arranged, so that automatic material selection, material weighing and material mixing of materials are realized, compared with the prior art, the selectivity of raw materials is greatly increased, and the automation degree and the flexibility are higher; meanwhile, excessive automatic metering devices are not needed, and the maintenance cost of the equipment is saved.

2. The moving device adopts the lead screw and the lead screw nut, so that the moving distance can be accurately controlled, and the precision of material selection is improved.

3. The arrangement of the position sensor can further ensure that the feeding end of the automatic metering device is aligned with the discharging end of the first screw conveyor, and accurate discharging is ensured.

4. Automatic metering device one side is provided with the fan that is used for insufflating the material in compounding device, and the air outlet department of fan is provided with the filter screen, can prevent that the material from being stopped up by the suck-back and leading to the air outlet, influences the fan and normally works.

Drawings

FIG. 1 is a schematic diagram of an automated proportioning device of the prior art;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic view of the automatic metering device of the present invention positioned below a first feed tank;

FIG. 4 is a schematic view of the automatic metering device of the present invention positioned below a third feed tank.

In the figure, 1, a raw material tank; 2. a first screw conveyor; 3. an automatic metering device; 4. a mixing device; 5. a second screw conveyor; 6. An extruder; 7. Weighing; 8. a gravity sensor; 9. a fan; 10. filtering with a screen; 11. a first valve; 12. a second valve; 13. stirring blades; 14. a feed inlet of the extruder; 15. a guide rail.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

Referring to fig. 2 to 4, an automatic proportioning device for modifying recycled polyethylene according to an embodiment of the present invention includes a plurality of material tanks 1, an automatic metering device 3, a mixing device 4, and a PLC controller; the raw material tanks 1 are arranged in parallel, each raw material tank 1 correspondingly stores one raw material, and all the raw material tanks 1 share one automatic metering device 3; a first screw conveyor 2 for conveying materials from the raw material tank 1 to an automatic metering device 3 is arranged below the raw material tank 1; the discharge end of the automatic metering device 3 is communicated with the feed end of the mixing device 4, and the discharge end of the automatic metering device 3 is also provided with a first valve 11 for controlling discharge; a second valve 12 for controlling discharging and a second screw conveyor 5 for feeding the materials into the extruder 6 are arranged at the discharging end of the mixing device 4; the automatic proportioning device also comprises a moving device for driving the automatic metering device 3 and the mixing device 4 to move along the arrangement direction of the raw material tanks 1; a metering scale 7 for weighing materials is arranged in the automatic metering device 3, and a gravity sensor 8 is arranged below the metering scale 7; and the first screw conveyor 2, the second screw conveyor 5, the first valve 11, the second valve 12 and the gravity sensor 8 are electrically connected with the PLC.

The moving device comprises a guide rail 15, a lead screw and a first motor for driving the lead screw to rotate, and the first motor is electrically connected with the PLC; a screw nut capable of reciprocating along the screw is arranged on the screw; the screw nut is fixed on the automatic metering device 3, a sliding block is fixedly arranged on the automatic metering device 3, and the sliding block is in sliding connection with the guide rail 15.

One side of the automatic metering device 3 is provided with a fan 9 for blowing materials into the mixing device 4, and the fan 9 is electrically connected with the PLC.

And a filter screen 10 is arranged at an air outlet of the fan 9.

The mixing device 4 is internally provided with a stirring shaft and a second motor for driving the stirring shaft to rotate, and the second motor is electrically connected with the PLC; and the stirring shaft is provided with a stirring blade 13.

The feed end of the automatic metering device 3 and the discharge end of the first screw conveyor 2 are both provided with position sensors, and the position sensors are electrically connected with the PLC.

Referring to fig. 2, in the initial state, the first valve 11 and the second valve 12 are both in the closed state.

Referring to fig. 3, the number of the material tanks 1 is 5, and before batching, the types and the amounts of the materials required by the current production are set in advance by a PLC controller, for example, the first material mass is x, the third material mass is y, and the fifth material mass is z.

And the ingredients can be started after setting. Referring to fig. 3, when the first motor is started, the screw rod rotates, and the screw nut moves along the screw rod to drive the automatic metering device 3 and the mixing device 4 to move on the guide rail 15. The moving device selects a lead screw and a lead screw nut, and the moving distance can be accurately controlled.

When the automatic metering device 3 and the mixing device 4 move to the lower part of the first raw material tank 1, the discharge end of the first spiral conveyor 2 is aligned with the feed end of the automatic metering device 3, the position sensor transmits a signal to the PLC, the first motor is paused at the moment, and the automatic metering device 3 and the mixing device 4 stop moving. The sensor can further ensure that the feed end of the automatic metering device 3 is aligned with the discharge end of the first screw conveyor 2, so that the accuracy of material selection is improved.

Referring to fig. 2, the first screw conveyor 2 is started, and the first raw material is fed into the weighing scale 7 of the automatic weighing device 3; when the mass reaches a set value x, the gravity sensor 8 feeds back a signal to the PLC controller, and the first screw conveyor 2 suspends feeding; meanwhile, the fan 9 is started, the first valve 11 is opened, and the first raw material is blown into the mixing device 4 by the fan 9 for temporary storage. After the first raw material is all blown to the mixing device 4, the gravity sensor 8 feeds back a signal to the PLC, the fan 9 is suspended at the moment, and the first valve 11 is closed. The air outlet of the fan 9 is provided with a filter screen 10, so that the situation that the air outlet is blocked due to the fact that materials are sucked backwards to influence the normal work of the fan 9 can be prevented.

Referring to fig. 4, after the first raw material weighing is finished, the first motor resumes to rotate, the automatic metering device 3 and the mixing device 4 continue to move along the guide rail 15, and when the first raw material weighing is moved to the third raw material tank 1, the third raw material is weighed in the same process.

And similarly, weighing the fifth raw material according to the process. After the required raw materials are weighed in sequence, the first raw material, the third raw material and the fifth raw material all enter the mixing device 4. The automatic metering device 3 and the mixing device 4 continue to move along the guide 15 in the direction of the extruder 6, and the movement is halted when the discharge end of the second screw conveyor 5 is aligned with the extruder feed opening 14, see fig. 2. At the moment, the second motor is started to drive the stirring shaft to rotate, the stirring blade 13 is used for stirring the mixed material, after the mixed material is uniformly stirred, the second valve 12 is opened, the second screw conveyor 5 is started to convey the mixed material to the feeding hole 14 of the extruder from the mixing device 4, and the subsequent production and processing are finished. After the mixture is discharged, the second screw conveyor 5 stops feeding, and the second valve 12 is closed.

When the batching ratio needs to be changed, the preset batching parameters such as raw material types and weight can be adjusted through the PLC controller. The PLC controller controls the first motor and the second motor to start and stop, controls the first valve 11 and the second valve 12 to open and close, controls the fan 9 to start and stop, and controls the whole batching process to realize automation, which is the prior art and is not described herein.

The working principle of the utility model is as follows: the automatic material proportioning device is provided with the movable automatic metering device 3 and the movable material mixing device 4, and the PLC is used for controlling the material selecting, weighing and mixing processes, so that the automatic proportioning of materials is realized, compared with the prior art, the selectivity of raw materials is greatly increased, and the automation degree and the flexibility are higher; meanwhile, excessive automatic metering devices 3 are not needed, and the maintenance cost of the equipment is saved.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the utility model is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. Automatic proportioning device suitable for regeneration polyethylene is modified, including a plurality of head tanks, automatic metering device, compounding device and PLC controller, its characterized in that: the raw material tanks are arranged in parallel, each raw material tank correspondingly stores one raw material, and all the raw material tanks share one automatic metering device; a first screw conveyor for conveying the materials from the raw material tank to the automatic metering device is arranged below the raw material tank; the discharge end of the automatic metering device is communicated with the feed end of the mixing device, and the discharge end of the automatic metering device is also provided with a first valve for controlling discharge; the discharge end of the mixing device is provided with a second valve for controlling discharge and a second screw conveyor for feeding materials into the extruder; the automatic proportioning device also comprises a moving device for driving the automatic metering device and the mixing device to move along the arrangement direction of the raw material tanks; a metering scale used for weighing materials is arranged in the automatic metering device, and a gravity sensor is arranged below the metering scale; and the first screw conveyor, the second screw conveyor, the first valve, the second valve and the gravity sensor are all electrically connected with the PLC.

2. The automated proportioning device of claim 1 for reclaimed polyethylene modification, wherein: the moving device comprises a guide rail, a lead screw and a first motor for driving the lead screw to rotate, and the first motor is electrically connected with the PLC; a screw nut capable of reciprocating along the screw is arranged on the screw; the lead screw nut is fixed on the automatic metering device, a sliding block is fixedly arranged on the automatic metering device, and the sliding block is connected with the guide rail in a sliding mode.

3. The automated proportioning device of claim 1 for reclaimed polyethylene modification, wherein: one side of the automatic metering device is provided with a fan used for blowing materials into the mixing device, and the fan is electrically connected with the PLC.

4. The automated proportioning device of claim 3 for reclaimed polyethylene modification, wherein: and the air outlet of the fan is provided with a filter screen.

5. The automated proportioning device of claim 1 for reclaimed polyethylene modification, wherein: the mixing device is internally provided with a stirring shaft and a second motor for driving the stirring shaft to rotate, and the second motor is electrically connected with the PLC; and the stirring shaft is provided with stirring blades.

6. The automated proportioning device of claim 1 for reclaimed polyethylene modification, wherein: the feeding end of the automatic metering device and the discharging end of the first screw conveyer are both provided with position sensors, and the position sensors are electrically connected with the PLC.