KR102505591B1 - Waste Synthetic Resin Regenerative Extrusion Unit with two Mixing Zone and Vents - Google Patents

Abstract

The present invention relates to an extrusion device for recycling waste synthetic resin, which includes a screw for grinding and mixing waste synthetic resin while transporting it, a screw housing in which the screw is located, and a filter housing with a built-in fine filter for filtering out foreign substances from molten waste synthetic resin. The mixing section for crushing and mixing the waste synthetic resin is divided into two on the screw, and the screw housing is formed with a ventilation hole to discharge steam and gas generated by being heated while being transported, respectively, and filters out foreign substances from the melted waste synthetic resin. It is characterized in that it is easy to clean or replace the fine filter.
As a result, durability is improved by distributing the load on the flight of the screw, and improved results can be obtained through repeated grinding and mixing work twice, and steam and gas generated by heating are immediately discharged to prevent backflow of materials and safety accidents. It is easy to replace the fine filter to filter the remaining foreign substances, so productivity and workability are good.

Description

Waste Synthetic Resin Regenerative Extrusion Unit with two Mixing Zone and Vents}

The present invention relates to a waste synthetic resin regeneration extrusion apparatus for recycling waste synthetic resin once used and discarded, and more specifically, waste synthetic resin as a base material is transferred by a screw rotating inside the regeneration extrusion apparatus by a heater. Efficiently discharges water vapor from which moisture evaporates while being heated and gas generated along with foreign substances remaining in the process of melting the base material so that the base material is stably melted and transported, while reducing the load generated during the extrusion process and increasing production efficiency. is to make it possible.

As is well known, since synthetic resin can be repeatedly molded by applying heat, it is recycled through a recycling process as much as possible without incineration or disposal in terms of resource saving and environmental protection.

The resin used for recycling is mainly waste synthetic resin such as plastic that has been used once and discarded, and is collected by type, then sorted out waste other than resin to be recycled at a sorting site, and made into flakes of a certain size or less through cutting. However, even in the material preparation state for such regeneration, moisture and foreign substances are inevitably included.

The prepared waste synthetic resin is injected into the regeneration extrusion device through the hopper and transported by the screw rotating inside the device. At the same time, it is heated by the heating device in the state of adding additives and gradually becomes a semi-melted state through kneading. It filters out the foreign matter remaining in the filter and makes it reusable.

However, in the conventional extrusion apparatus for regenerating waste synthetic resin, water vapor generated by evaporating water by heating waste synthetic resin and gas generated together with foreign substances during melting flow back to the hopper into which the waste synthetic resin is injected, so that the injected waste synthetic resin is transported. It slows down work and lowers productivity.

In addition, the vapor remaining in the passage where the screw is located lowers the temperature inside the passage to prevent the waste synthetic resin from melting, and the longer the time remaining in the passage, the longer the gas remains in the passage, the louder the explosion or the worse the gas explosion. There is a problem that causes the same safety accident.

In addition, in order to evenly mix the additives in the waste synthetic resin, it is necessary to pass through a kneading section (or mixing section) in a narrow space where the flights of the screw are arranged short. There is also a problem that durability is lowered due to increased and rapid abrasion of the flight, and there is also a problem that thermoplasticization of the base material occurs and carbonization by thermal decomposition also occurs.

And in the conventional extrusion device, the filter device installed at the end of the screw passage is designed to pass through the filter in the straight direction in which the molten material is extruded and discharged, and the filter housing equipped with the motor, transmission, filter, and scraper are all removed from the end of the screw passage. It is configured in an open form while being spaced apart. Therefore, in order to clean the inside of the filter housing or replace the fine filter, maintenance was performed in such a way that the motor, transmission, fine filter, and scraper were all mounted and the filter housing, which was very heavy, had to be opened while hanging with a crane.

As a result, due to these problems, tasks such as cleaning the inside of a filter housing or replacing a fine filter have to be very difficult, time-consuming, and dangerous tasks.

Republic of Korea Patent Registration No. 10-1985373

The present invention, which has been made to solve the above problems, provides a waste synthetic resin regeneration extrusion apparatus in which the process of crushing and melting the waste synthetic resin is improved, so that water vapor and gas generated from the melted waste synthetic resin do not flow backward or remain inside the passage. Its purpose is to improve sufficient kneading and productivity while facilitating the flow of the base material being discharged and melted.

In addition, an object of the present invention is to significantly improve productivity while reducing energy consumption by reducing the load of the screw and the motor and improving durability.

In addition, an object of the present invention is to ensure that maintenance of the filter housing can be performed safely, conveniently and quickly.

In order to achieve the above object, the extrusion apparatus for recycling waste synthetic resin having a mixing zone divided from two vents of the present invention has a mixing section divided into two and an end of the mixing section on a screw for conveying waste synthetic resin and performing crushing and mixing operations. Ventilation holes are formed to distribute the load of the flight generated from crushing and mixing of waste synthetic resin to improve durability, and vapor and gas generated from waste synthetic resin remaining during work are discharged through the ventilation holes to prevent backflow of waste synthetic resin and safety accidents. characterized by preventing

In addition, the fine filter, which filters out foreign substances remaining in the melted waste synthetic resin through crushing and mixing, allows maintenance work to be performed like a crane by opening only the door while the housing body is fixed to the end of the screw. It is characterized in that it can proceed safely without a large device.

The waste synthetic resin regeneration extrusion device of the present invention provides a regeneration extrusion device in which a mixing zone is divided and distinguished from two vents having a predetermined distance in a passage where a screw is located to transport waste synthetic resin, thereby stably melting and transporting the base material. This is possible, and quality improvement can be promoted by lowering plasticization and carbonization by uniform and sufficient residence time through divided kneading, and productivity can be improved by designing a wide flight pitch.

In addition, water vapor and gas are quickly and effectively discharged through the vent to prevent a decrease in productivity and safety accidents.

In addition, the process of mixing waste synthetic resin and additives is divided into two stages to mix them evenly, and the load on the flight of the screw is reduced, improving durability and reducing electricity consumption.

In addition, maintenance of the filter housing, such as replacing the fine filter, can be performed very safely and quickly.

1 is an overall side view of the present invention
2 is an overall cross-sectional view of the present invention
3 is a partial cross-sectional view of the present invention
4 is another partial cross-sectional view of the present invention
5 is a cross-sectional plan view of FIG. 4

Hereinafter, the waste synthetic resin regeneration extrusion apparatus having two mixing zones and a ventilation hole of the present invention will be described in detail. This description is based on an embodiment for implementing the present invention, and the technical idea pursued by the present invention It is not intended to be limited to the form described in the embodiments described in this document, and it will be understood to include various modifications, equivalents and / or alternatives of the embodiments of the present invention.

In addition, even if the operational effects according to the configuration of the present invention are not explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be recognized.

The waste synthetic resin extrusion apparatus 1 of the present invention is formed long in the longitudinal direction, and the screw 10 is located in the passage 21 inside the screw housing 20, and at one end is a screw motor 23 as a power means for rotation. is connected, and at the opposite end, a screw support 22 for supporting the screw 10 is assembled, and a heating device (not shown) is provided outside the screw housing 20.

The screw 10 has a rotational shaft 11 having a predetermined diameter and becomes a body, and a flight 12 that is smaller than the diameter of the passage 21 around the rotational shaft 11 and spirally connected to transfer, crush, and mix the waste synthetic resin. ).

In the spiral flight 12, the ratio (efficiency) of the work of transporting, crushing, and mixing the waste synthetic resin (hereinafter referred to as 'base material') varies according to the distance (distance) between the flights 12. Under the wide gap (12-1), the distance between the flights (12) is reduced and the contact with the base material is reduced, reducing the efficiency of grinding and mixing work, but is effective in transferring the base material due to high durability, and the narrow gap (12-2) is (12) As the distance between them increases, the contact with the parent material is frequent, so the durability is reduced, but the grinding and mixing work is effective.

The screw used in the conventional waste synthetic resin regeneration extrusion device is divided into a transfer section formed of flights at a wide interval as needed at the starting point and a mixing section formed with flights at a narrow interval to crush and mix the base material in the rest. If the mixing section is short, the base material If the grinding and mixing are not done properly and the mixing section is long, the length of time the base material stays between the flights is lengthened and carbonized, and the wear of the flights is accelerated, resulting in a rapid drop in durability.

In order to solve this problem, the screw 10 of the present invention is a first transfer section 31 in which the base material is heated to an appropriate temperature by a heating device while being transported, and a first mixing section 34 for grinding and mixing the heated base material , the second transfer section 32 for transporting the first worked base material, the second mixing section 35 for crushing and mixing the first worked base material again, the third transfer section for transferring the second worked base material ( 33) in order to divide the load received by the flight 12 in the mixing sections 34 and 35 to improve durability and sufficiently mix the additives used in the base material.

The first transfer section 31 is configured in such a way that the diameter of the rotating shaft 11 is small and then gradually increases while the flights 12 have a wide interval 12-1, so that the lungs in a large space and bulky state are initially formed. It plays a role in transporting synthetic resin while being gradually compressed, and in the first mixing section 34, the flight 12 maintains a narrow gap 12-2, and the diameter of the rotating shaft 11 is the first conveying section 31 The maximum diameter is maintained and the dissolving base material is pushed out while stirring and compressing with strong force at the same time.

The second transfer section 32 is formed in such a way that the diameter of the rotating shaft 11 is small and gradually increases while the flights 12 have a wide interval 12-1, and passes through the first mixing section 34 While functioning to relax the degree of compression of the base material, it slows down the transfer speed to reduce the stress of the material and help to release the gas.

In the second mixing section 35, which is composed after the second conveying section 32, the diameter of the rotating shaft 11 is the maximum of the second conveying section 32 while the flight 12 maintains the narrow gap 12-2. The diameter of is maintained and the dissolving base material is pushed out while stirring and compressing with strong force. Kneading may be enhanced by forming a counter-rotating flight unit at the rear end of the second mixing section 35.

In addition, the third transfer section 33 is also configured in such a way that the diameter of the rotating shaft 11 is small and gradually increases while the flights 12 have a wide interval 12-1, so that the second mixing section 35 It has the function of relaxing the degree of compression of the parent material that has passed through it and slows down the transfer speed to reduce the stress of the material and to release the gas.

In addition, by making the flight 12 intervals in the first mixing section 34 and the second mixing section 35 different from each other, the working ratio of grinding and mixing can be set to 30:70, 40:60, etc. do.

Ventilation ports 24 are formed in the screw housing 20 at the positions where the mixing sections 34 and 35 end and the second conveying section 32 and the third conveying section 33 start, respectively, so that water vapor generated by melting the base material and gas are discharged so that they do not flow back or remain, and use a ventilation filter (24-1), a dust collector (24-2), etc. as necessary.

At the end of the screw housing 20 to which the screw 10 is assembled, a filter housing 40 having a built-in fine filter 42 is positioned to filter out foreign substances remaining in the molten base material while being transported.

A fine filter 42 is installed in the inner center of the main body 40' of the filter housing 40 in a direction perpendicular to the entry direction of the base material, and a direction perpendicular to the entry direction of the base material also outside the main body 40'. After installing the scraper motor 44, the shaft of the scraper motor 44 penetrates the fine filter 42, and then the scraper 43 adhered to the surface of the fine filter 42 is installed at the end.

In addition, the screw housing 20 is connected to the main body 40 'in front of the fine filter 42 so that the base material is supplied so that the base material enters and then passes through the fine filter 42 while being transferred in a right angle direction, The transport pipe 60 through which the base material passing through the filter housing 40 is discharged is connected laterally again from the rear of the fine filter 42, and the base material passing through the fine filter 42 is converted to a right angle again, It is designed to be released.

In addition, an opening/closing door 41 is installed on one side of the filter housing 40, that is, on the side of the main body 40' on which the scraper 43 is installed, so that it can be opened and closed by a hinge installed between the main bodies 40'. The opening and closing door 41 is used to clean the inner space of the main body 40' or to wash and replace the fine filter 42 that has been used for a long time.

Due to this configuration, since the heavy filter housing 40 is directly connected and fixed to the screw housing 20, it is possible to clean the inside or replace the fine filter 42 by opening only the opening and closing door 41.

Looking at the operation of the present invention configured as described above is as follows.

Foreign substances that are easy to classify are preferentially removed from the collected waste synthetic resin, and then put into the waste synthetic resin recycling extrusion device 1 to make it recyclable.

More specifically, when the base material is put into the hopper 50, it enters the passage 21 of the screw housing 20 and is transported while being compressed by the rotating screw 10.

The base material is transferred in a state of being slowly heated by a heating device in the first transfer section 31 and pulverized on the flight 12 having a narrow gap 12-2 in the first mixing section 34, and the additives are mixed evenly While mixing and staying for work, the base material melts little by little and the remaining moisture evaporates, resulting in water vapor and gas generated from the base material and gas are discharged through the ventilation port 24 located at the end.

The primary material in the first mixing section 34 passes through the second transfer section 32 and passes to the second mixing section 35, where it is crushed and mixed once again while steam and gas are discharged through the ventilation port 24 It is discharged to a more molten state and is transferred to the filter housing 40 through the third transfer section 33.

The base material that has reached the filter housing 40 is continuously pushed like an extrusion method by the base material pushed from behind and passes through the fine filter 42, and the molten base material passes through the fine filter 42 to filter out the remaining foreign substances and then It is transported through the transfer pipe 60 for the process.

Due to the mixing section (34, 35) divided into two, the load on the flight (12) having a narrow gap (12-2) is distributed to improve durability, and the crushing and mixing work is carried out twice to achieve more improved The base material can be obtained, and steam and gas generated when the base material is melted are discharged through the ventilation hole 24, and the base material flows backward in the passage 21 to delay the work speed or prevent safety accidents such as gas explosion.

In addition, in the case of the filter housing 40, since the main body 40' is fixed to the screw housing 20, opening the door 41, which is relatively light in weight, cleans the inside or cleans and replaces the fine filter 42. It has the advantage of being convenient and simple to do.

1: Waste synthetic resin recycling extrusion device
10: screw
11: axis of rotation
12: Flight
12-1: wide spacing
12-2: narrow spacing
20: screw housing
21: aisle
22: screw support
23: screw motor
24: ventilation hole
24-1: ventilation filter
24-2: dust collector
31: 1st transfer section
32: 2nd transfer section
33: 3rd transfer section
34: 1st mixing section
35: 2nd mixing section
40: filter housing
40': body
41: opening and closing door
42: fine filter
43: scraper
44: scraper motor
50: Hopper
60: transfer pipe

Claims (3)

The screw 10 on which the flight 12 is formed is assembled to the passage 21 of the screw housing 20, and a fine filter 42 is built-in at the end of the screw 10 assembled to the screw housing 20 in the transport direction. In the waste synthetic resin regeneration extrusion device connected to the filter housing 40 having a scraper 43 that scrapes foreign substances attached to the fine filter 42,
The screw 10,
The flight 12 has a wide interval 12-1 and the diameter of the rotation shaft 11 is small and gradually increases, so that the waste synthetic resin with a lot of space and a large volume is introduced and gradually compressed and transported. A first transfer section 31 serving as a role;
While the flight 12 maintains a narrow gap 12-2, the diameter of the rotating shaft 11 maintains the maximum diameter of the first transfer section 31 to push the dissolving base material while stirring and pressing with strong force at the same time. a first mixing section 34;
Again, the flight 12 has a wide interval 12-1, and the diameter of the rotating shaft 11 is configured in a form where the diameter of the rotating shaft 11 is small and then gradually increases to relax the degree of compression of the base material passing through the first mixing section 34 A second conveying section 32 that assists the action of discharging gas while reducing the stress of the material by slowing down the conveying speed while functioning;
Again, while the flight 12 maintains a narrow gap 12-2, the diameter of the rotating shaft 11 is maintained at the maximum diameter of the second transfer section 32 to push the dissolving base material while stirring and pressing with strong force at the same time. And, a second mixing section 35 for strengthening kneading by forming a counter-rotating flight part at the rear end;
Again, the flight 12 has a wide interval 12-1 and the diameter of the rotating shaft 11 is configured in a form where the diameter of the rotating shaft 11 is small and then gradually increases to relax the degree of compression of the base material passing through the second mixing section 35 It is divided into a third conveying section 33 that functions to discharge gas while reducing the stress of the material by slowing the conveying speed while performing the function,
The filter housing 40 is located at the end of the screw housing 20, but the fine filter 42 and the scraper 43 are placed in the center of the inside of the main body 40' of the filter housing 40 in a direction perpendicular to the entry direction of the base material. install,
The screw housing 20 is connected to the main body 40' in front of the fine filter 42 so that the base material is supplied so that the base material enters and passes through the fine filter 42 while being transferred in a right angle direction. The transfer pipe 60 through which the base material passing through 40 is discharged is connected laterally again from the rear of the fine filter 42 so that the base material passing through the fine filter 42 is discharged while the transfer direction is converted to a right angle again. make up,
An opening/closing door 41 is installed on one side of the filter housing 40, that is, on the side where the scraper 43 of the main body 40' is installed, so that it can be opened and closed by a hinge installed between the main bodies 40'. Waste synthetic resin regeneration extrusion apparatus having two mixing zones and ventilation holes, characterized in that when only 41) is opened, internal cleaning or replacement of the fine filter 42 is possible. According to claim 1,
In the first mixing section 34 and the second mixing section 35, the flights 12 have different dimensions apart from the narrow spacing 12-2 of the same dimension, so that the grinding and mixing ratio of the base material is different. Waste synthetic resin regeneration extrusion apparatus having two mixing zones and ventilation holes, characterized in that it can be set. According to claim 1,
The filter housing (40) has two mixing zones and a ventilation hole, characterized in that both the screw housing and the transfer pipe are connected to one side of the main body (40').

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