KR20240033918A - Foreign matter filtering device for recycled synthetic resin - Google Patents

Abstract

The present invention relates to a resin filtration device, and more specifically, to a foreign material filtration device for recycled synthetic resin that can increase filtration efficiency when filtering foreign substances from recycled resin during the extrusion process and is easy to maintain.
For this purpose, a foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention includes a filtration unit that filters foreign substances from synthetic resin, a filtration unit provided on the outside of the filtration unit to slideably accommodate the filtration unit, and a synthetic resin flowing into the filtration unit. A housing that provides a flow path through which the filtered synthetic resin is discharged, a supply unit connected to the housing to continuously supply synthetic resin for regeneration, and a supply unit provided on one side of the filtration unit so that the filtration unit can be withdrawn and withdrawn by sliding from the housing. It includes a driving unit that drives it.

Description

Foreign matter filtering device for recycled synthetic resin}

The present invention relates to a resin filtration device, and more specifically, to a foreign material filtration device for recycled synthetic resin that can increase filtration efficiency when filtering foreign substances from recycled resin during the extrusion process and is easy to maintain.

Generally, when molding products using synthetic resin, methods such as extrusion or injection molding are used.

Recently, synthetic resins that are used and discarded due to environmental problems are recycled and processed into raw materials to be molded and manufactured into new products.

In order to recycle recycled synthetic resin as a raw material as described above, waste synthetic resin is first crushed, heated, melted, extruded, and molded into pellets to be recycled as a raw material for forming new products.

However, if foreign substances mixed in synthetic resin are recycled during the recycling process without removing them, a problem arises in which the incidence of defects in products manufactured using recycled synthetic resin increases.

In addition, during the process of regenerating foreign substances, the recycling equipment becomes clogged by foreign substances, which acts as a factor in causing breakdowns.

In order to solve the above problems, the quality of recycled synthetic resin raw materials has recently been improved by removing foreign substances using extruders equipped with filtration filters. When new products are produced with these high-quality raw materials, the quality of the products also increases and the incidence of defects significantly decreases. It deteriorates.

However, since extruders equipped with filtration filters are usually integrated with the extruder or are combined in such a way that the filtration filter is installed internally, a large amount of money and time are invested in maintaining and repairing the filter. I do it.

And since the filter is configured in a flat shape, the filtration area is limited, which makes it difficult to maintain filtration efficiency.

In addition, the filtration filter of the existing extruder is difficult to replace due to structural problems, and since one filtration filter is used in one equipment, the problem of having to stop the entire equipment when replacing the filtration filter occurs. do.

In order to solve the above problem, in the prior art document 1 (Registered Patent No. 10-2070413 Resin Filtration System), which is the inventor of the applicant's previous application, filtration efficiency can be increased by maximizing the filtration area by applying a cylindrical filter, and the filter used for filtration is A configuration is disclosed in which a plurality of installed filtration units are used, but the filter can be replaced while one filtration unit is operated continuously and only the one filtration unit in which a problem occurs is stopped.

However, in Prior Literature 1, a gap exists between the filter and the filtration flow path, causing a problem in which the filter is deformed by the pressure at which the resin is filtered.

In addition, since the inlet and outlet are provided as a single unit, filtration efficiency is poor, and the flow is not evenly distributed when the resin is introduced and discharged, resulting in a delay in working time.

Prior Document 1 (Registered Patent 10-2070413 Resin Filtration System)

The present invention was devised to solve the above-mentioned problems, and provides a foreign matter filtration device for recycled synthetic resin that can be maintained without being deformed by the pressure of the inflow and filtration by applying a double filter structure to the filtration unit and overlapping each other in a cylindrical shape. The purpose is to

The purpose is to provide a foreign matter filtration device for recycled synthetic resin that can reduce the time required to filter foreign substances from the resin by dispersing and discharging the resin through a plurality of passages when discharged after being filtered. do.

In addition, the purpose is to provide a foreign matter filtration device for recycled synthetic resin that has a cover for replacing the filter and is detachable by bolting to facilitate maintenance such as cleaning or replacement of the filter.

A foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention to solve the above problems includes a filtration unit that filters foreign substances from synthetic resin, and a filtration unit provided on the outside of the filtration unit to slideably accommodate the filtration unit. A housing that provides a flow path through which synthetic resin flows into and filtered synthetic resin is discharged, a supply unit connected to the housing to continuously supply synthetic resin for regeneration, and a supply unit provided on one side of the filtration unit so that the filtration unit slides from the housing. It is characterized by including a driving unit that drives it to enable withdrawal and withdrawal.

Here, the filtration unit has the same configuration, but is provided in plural pieces that can be individually slidably withdrawn and withdrawn from the inside of the housing, with a first filtration unit provided on one side of the housing and a first filtration unit provided on the other side where the first filtration unit is provided. Characterized in that it includes a second filtration unit.

In addition, the housing is characterized in that a filtration unit driving hole is formed with a diameter corresponding to the outer periphery of the filtration unit and through which the filtration unit is slidably driven.

In addition, the filtration unit includes a filtration cylinder through which synthetic resin flows and is filtered, an inlet formed on one side of the filtration cylinder through which the synthetic resin flows, and an inside of the filtration cylinder to filter foreign substances from the synthetic resin flowing into the inlet. a filtering unit, a distributed discharge flow path provided inside the filtering unit and including a plurality of passages so that the synthetic resin filtered through the filtering unit is dispersed and discharged, and the synthetic resin discharged through the plurality of dispersed discharge passages is collected and discharged in batches. It is characterized in that it includes an outlet through which discharge is discharged.

Here, the filtering unit includes a mesh filter provided in a cylindrical shape in an outward direction based on the center of the filter cylinder, and an inside of the mesh filter that overlaps the mesh filter to support the mesh filter from deformation while passing the filtered synthetic resin. It is characterized by including a wire mesh.

At this time, the filter cylinder is characterized in that a wire mesh installation groove of a size and shape corresponding to the wire mesh and a filter installation groove of a size and shape corresponding to the mesh filter are formed on the outside of the wire mesh installation groove.

Meanwhile, the inlet is characterized in that a round inlet portion is formed at a portion where the flow direction of the resin is switched from the inlet portion through which the synthetic resin flows to the filter side.

In addition, the distributed discharge flow path is characterized in that a buffer bending portion is formed to bend the path through which the filtered synthetic resin is discharged to induce the synthetic resin to flow without colliding.

The filtration cylinder is characterized by being provided with a cylinder cover that supports the wire mesh and mesh filter while forming one end of the wire mesh installation groove and the filter installation groove.

At this time, the cylinder cover is characterized by being provided with a plurality of bolt fastening holes that can be attached and detached from the filter cylinder by bolts.

The foreign matter filtering device for recycled synthetic resin according to an embodiment of the present invention has a stacked structure of cylindrical filters, which allows the filter to efficiently filter foreign substances while maintaining its shape without being deformed.

In addition, the discharge flow path for the resin through which foreign substances are filtered and discharged from the synthetic resin is provided to be divided, which has the effect of smoothly discharging the resin from which the foreign substances have been filtered.

In addition, the bolt-fastening cover makes it easy to maintain and replace the filter.

1 is an overall perspective view of a foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of a foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.
Figure 3 is an exploded perspective view of only the filtration unit of the foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.
Figure 4 is a cross-sectional view taken along line I-I detailing the filtration unit in the foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.
Figure 5 is a cross-sectional view taken along line II-II showing the inner configuration of the housing in the foreign matter filtering device for recycled synthetic resin according to an embodiment of the present invention.
Figure 6 is a cross-sectional view of the supply unit in the foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.
Figure 7 is an example showing the dispersion form of the dispersed discharge flow path in the foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.
Figure 8 is an operating state diagram showing a state in which one filtration unit among a plurality of filtration units is pulled out from the housing in the foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.

The present invention relates to a filtration device that can filter out foreign substances in the process of regenerating recycled synthetic resin. In particular, filtration efficiency can be increased by maximizing the filtration area by applying a cylindrical filter, and maintenance such as replacement and cleaning of the filter is simple. It is easy to use and is characterized by being able to shorten the time required for regeneration work by smoothing the flow of resin during the inflow and discharge of resin.

Hereinafter, a foreign matter filtering device for recycled synthetic resin according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is an overall perspective view of a foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention, Figure 2 is an exploded perspective view of a foreign material filtration device for recycled synthetic resin according to an embodiment of the present invention, and Figure 3 is an exploded perspective view of a foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention. This is an exploded perspective view enlarging only the filtration unit of a foreign matter filtration device for recycled synthetic resin according to an embodiment.

Referring to Figures 1 to 3, the present invention includes a filtration unit 100 capable of filtering foreign substances from waste synthetic resin in a melted state, and a filtration unit 100 provided on the outside of the filtration unit 100. ) It is configured to include a housing 200 that introduces molten waste synthetic resin into the filtration unit 100 while protecting the filtration unit 100 and provides a flow path through which the filtered waste synthetic resin can be discharged.

Here, a supply unit 300 that supplies molten synthetic resin is connected to the housing 200. The detailed configuration of the supply unit 300 will be described later.

Additionally, a driving unit 400 that can be slidably driven to withdraw or retract the filtration unit 100 from the housing 200 is provided at the top of the housing 200.

The filtration unit 100 is installed in the housing 200 to be able to slide in and out, and is provided with a plurality of filtration units of the same configuration, including a first filtration unit 110 and a second filtration unit 120. .

At this time, a filtration unit driving hole 230 is formed inside the housing 200 so that the first filtration unit 110 and the second filtration unit 120 can be slid in and out.

The first filtration unit 110 has a cylindrical structure and includes a filtration cylinder 111 that is drawn in and out of the housing 200 and forms a flow path through which waste synthetic resin is filtered.

An inlet 112 through which the waste synthetic resin supplied from the supply unit 300 flows is formed on one side of the filtration cylinder 111, and an inlet 112 flows into the outside of the lower part of the filtration cylinder 111. A filtering unit 113 through which waste synthetic resin is filtered is provided.

An outlet 114 through which the waste synthetic resin filtered by the filter 113 is discharged is formed in communication with the center of the filter cylinder 111 and the other side where the inlet 112 is formed.

The singa filtration unit 113 is provided with a mesh filter 113a on the outside and a wire mesh 113b is provided on the inside of the mesh filter 113a to form a filter layer.

In addition, a wire mesh installation groove 111a in which a cylindrical wire mesh 113b is installed is formed in the lower part of the filtration cylinder 111, and a filter installation groove 111b in which the mesh filter 113a can be installed is formed outside the mesh filter 111b. do.

In addition, a cylinder cover 116 that is detachable with a bolt is provided at the lower part of the filtering cylinder 111 so that the wire mesh 113b and the mesh filter 113a can be cleaned and replaced.

The cylinder cover 116 is detachable by a plurality of bolts, and a plurality of bolt fastening holes 116a are formed along the circumferential direction where it is detachable from the filter cylinder 111.

The second filtration unit 120 has the same configuration and structure as the first filtration unit 110, and detailed descriptions and reference signs for the second filtration unit 120 will be omitted.

Figure 4 is a cross-sectional view taken along line I-I detailing the filtration unit in the foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.

If the filtration unit 100 is described in more detail with reference to FIG. 4, the filtration unit 100 is composed of a cylindrical filtration cylinder 111, and on one side of the filtration cylinder 111 is a melted waste synthetic resin. An inlet 112 that flows into the state is formed.

As waste synthetic resin flows into the inlet 112 and flows into the filtering unit 113 in a right-angled direction, a round inlet 112a is formed at a position where the flow of waste synthetic resin changes.

When the waste synthetic resin is introduced, the round inlet part 112a induces the flow of the waste synthetic resin in a round shape to facilitate the flow, and in this process, a vortex is generated so that the waste synthetic resin spreads evenly and flows into the filter unit 113. It can be done as much as possible.

This eliminates the bottleneck phenomenon when waste synthetic resin flows in, changes the flow at a right angle, and prevents waste synthetic resin from remaining in bent areas.

The waste synthetic resin flowing into the inlet 112 is transferred to the filtering unit 113. At this time, a space of a certain width is formed on the lower outer surface where the inlet 112 is formed, that is, the outer surface where the mesh filter 113a is installed. , This space forms a space spaced apart from the inner periphery of the filtration unit driving hole 230 formed in the housing 200, and forms an inflow passage 112b through which waste synthetic resin can be filtered while spreading to the outside of the mesh filter 113a. forms.

The filtration unit 113 has a cylindrical mesh filter 113a installed on the outside and a wire mesh 113b installed right inside it.

The mesh filter 113a and the wire mesh 113b are installed in a structure that overlaps closely with each other to prevent the mesh filter 113a from being deformed by the pressure of the waste synthetic resin being transported and filtered when the waste synthetic resin is introduced and filtered. The filtered waste synthetic resin can be transferred to the outlet 114 through the wire mesh 113b.

Meanwhile, when the filtered waste synthetic resin is discharged through the outlet 114, a plurality of distributed discharge passages 115 may be formed along the inner circumference of the cylindrical mesh filter 113a and the wire mesh 113b.

The distributed discharge flow path 115 allows waste synthetic resin to flow in to the outside of the mesh filter 113a, pass through the mesh filter 113a, be filtered, and then be discharged through the wire mesh 113b, allowing the filtered waste synthetic resin to flow smoothly. Many are formed radially at regular intervals so that they can be discharged.

In addition, the distributed discharge passage 115 is formed with a buffer bend 115a forming an oblique slope in a path connected to the discharge port 114.

When the buffer bending portion 115a is provided at a right angle when the waste synthetic resin is discharged through the distributed discharge passage 115, it can prevent the flow from becoming unstable due to a sudden change in the flow of the waste synthetic resin and maintain a smooth flow. There will be.

As a result, when filtering waste synthetic resin, the filtration area is maximized to increase filtration efficiency, and the time required for filtration can be shortened by facilitating the flow of waste synthetic resin during the filtration process.

Figure 5 is a cross-sectional view taken along line II-II showing the inner structure of the housing in the foreign matter filtering device for recycled synthetic resin according to an embodiment of the present invention.

Referring to FIG. 5, the housing 200 has a supply passage 210 for supplying waste synthetic resin to the filtration unit 100 when the filtration unit 100 is installed, and a supply passage 210 on the opposite side of the supply passage 210. It is configured to include a discharge passage 220 that discharges the provided and filtered waste synthetic resin.

And between the supply flow path 210 and the discharge flow path 220, a plurality of filtration unit driving holes 230 in which the first filtration unit 110 and the second filtration unit 120 are respectively installed are formed.

Here, the filtration unit driving hole 230 is shown as two, but if necessary, it may be formed in multiple numbers and multiple filtration units 100 may be installed.

The supply passage 210 includes a first supply passage 211 that supplies waste synthetic resin to the first filtration unit 110 and a second supply passage 212 that supplies waste synthetic resin to the second filtration unit 120. It is composed by:

And the discharge passage 220 also has a first discharge passage 221 through which the waste synthetic resin is filtered and discharged from the first filtration unit 110, and a second discharge passage 221 through which the waste synthetic resin is filtered and discharged from the second filtration unit 120. It is configured to include a discharge passage 222.

Meanwhile, a flow sensor 240 may be provided in the supply flow path 210 and the discharge flow path 220.

The flow sensor 240 can check the filtration status of the filtration unit 100 by comparing the flow rate of waste synthetic resin in and out of waste synthetic resin with a set value.

For example, if the discharged flow rate is measured below the set value compared to the inflow rate, it is determined that there is excessive foreign matter in the mesh filter (113a) and the wire mesh (113b) of the filtration unit 100, and an alarm is sounded or the foreign matter is detected. This excessively clogged filtration unit 100 can be automatically driven to stop the supply of waste synthetic resin and withdraw it to the outside of the housing 200 to clean the filtration unit 113 or replace the mesh filter 113a and the wire mesh. There will be.

Since the above configuration is collectively controlled by a control unit (not shown), detailed description will be omitted.

Figure 6 is a cross-sectional view of the supply unit in the foreign matter filtering device for recycled synthetic resin according to an embodiment of the present invention.

Referring to FIG. 6, the supply unit 300 includes a supply pipe 310 through which waste synthetic resin is transferred and supplied, and a transfer screw 320 provided inside the supply pipe 310 and rotating to transfer and supply the waste synthetic resin. It is composed including.

The supply unit 300 is connected to the supply passage 210 of the housing 200 and can continuously supply waste synthetic resin into the housing 200.

At this time, the waste synthetic resin is supplied to the housing 200 while maintaining a constant pressure by the pressure generated by the rotation of the transfer screw 320, and the waste synthetic resin is filtered while passing through the mesh filter 113a by the pressure.

Figure 7 is an example diagram showing the dispersion form of the dispersed discharge flow path in the foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.

Referring to FIG. 7, in the filtration unit 100, the distributed discharge flow path 115 may be formed in 4 or 8 directions.

The greater the number of dispersed discharge passages 115, the smoother the discharge of waste synthetic resin can be. An appropriate number of distributed discharge passages 115 can be formed as needed within the range in which the passage can be formed.

Figure 8 is an operating state diagram showing a state in which one filtration unit among a plurality of filtration units is pulled out from the housing in the foreign matter filtration device for recycled synthetic resin according to an embodiment of the present invention.

Referring to FIG. 8, while a plurality of filtration units 100 are installed in the housing 200, only one filtration unit 100 is pulled out to replace or clean the mesh filter 113a and the wire mesh 113b, and the other filtration unit 100 is installed in the housing 200. One filtration unit 100 can perform filtration continuously without interruption.

At this time, the plurality of filtration units 100 are each equipped with individually driven driving units 400, and are operated for withdrawal and extraction by the driving units 400, and may be automatically controlled by a separately installed control unit (not shown). .

The control unit can operate the driving unit 400 by operator manipulation, and can be operated using the measured value of the flow sensor 240 installed in the supply passage 210 and discharge passage 220 of the housing 200. It may be possible.

The driving unit 400 may be a cylinder type such as a hydraulic cylinder or pneumatic cylinder, or an electric actuator may be used.

The present invention made as described above can maximize the filtration efficiency compared to the size of the device when recycling waste synthetic resin as a raw material and filtering foreign substances in a molten state, and facilitates the flow of waste synthetic resin. In addition to shortening the time required for filtration, it is also possible to facilitate maintenance work such as cleaning or replacing filters.

100: filtration unit 110: first filtration unit
111: filtration cylinder 111a: wire mesh installation groove
111b: Filter installation groove 112: Inlet
112a: round inlet 112b: inlet flow path
113: filtration unit 113a: mesh filter
113b: wire mesh 114: outlet
115: distributed discharge flow path 115a: buffer bend
116: cylinder cover 116a: bolt fastening hole
120: second filtration unit 200: housing
210: Supply flow path 211: First supply flow path
212: second supply flow path 220: discharge flow path
221: first discharge flow path 222: second discharge flow path
230: Filtration unit driving hole 240: Flow sensor
300: supply unit 310: supply pipe
320: transfer screw 400: drive unit

Claims (10)

A filtration unit 100 that filters foreign substances from synthetic resin;
A housing 200 provided on the outside of the filtration unit 100 to slideably accommodate the filtration unit 100 and providing a flow path through which synthetic resin flows into the filtration unit 100 and the filtered synthetic resin is discharged;
A supply unit 300 connected to the housing 200 and continuously supplying synthetic resin for recycling; and
A foreign matter filtering device for recycled synthetic resin, comprising a driving unit 400 provided on one side of the filtration unit 100 and driving the filtration unit 100 so that the filtration unit 100 can be slid out of and out of the housing 200. .
In claim 1,
The filtration unit 100 has the same configuration, but is provided in plural pieces that can be individually slidably withdrawn and withdrawn from the inside of the housing 200, including a first filtration unit 110 provided on one side of the housing 200, A foreign matter filtration device for recycled synthetic resin, comprising a second filtration unit (120) provided on the other side of the first filtration unit (110).
In claim 1,
A foreign matter filtration device for recycled synthetic resin, characterized in that the housing 200 is formed with a filtration unit driving hole 230 having a diameter corresponding to the outer periphery of the filtration unit 100 and through which the filtration unit 100 is slidably driven.
In claim 1,
The filtration unit 100 includes a filtration cylinder 111 through which synthetic resin flows and is filtered, an inlet 112 formed on one side of the filtration cylinder 111 through which synthetic resin flows, and an inside of the filtration cylinder 111. A filtering unit 113 is provided to filter foreign substances from the synthetic resin flowing into the inlet 112, and a filtering unit 113 is provided inside the filtering unit 113 to disperse and discharge the synthetic resin filtered through the filtering unit 113. Foreign matter for recycled synthetic resin, characterized in that it includes a distributed discharge passage 115 including as many passages as possible, and an outlet 114 through which the synthetic resin discharged into the plurality of distributed discharge passages 115 is collected and discharged in batches. Filtration device.
In claim 4,
The filtering unit 113 includes a mesh filter 113a provided in a cylindrical shape in an outward direction based on the center of the filtering cylinder 111, and an inside of the mesh filter 113a that overlaps with the mesh filter 113a. A foreign matter filtering device for recycled synthetic resin, characterized in that it includes a wire mesh (113b) that allows the filtered synthetic resin to pass while supporting the mesh filter (113a) so that it is not deformed.
In claim 5,
The filtration cylinder 111 has a wire mesh installation groove 111a of a size and shape corresponding to the wire mesh 113b, and a filter of a size and shape corresponding to the mesh filter 113a outside the wire mesh installation groove 111a. A foreign matter filtration device for recycled synthetic resin, characterized in that an installation groove (111b) is formed.
In claim 4,
A foreign matter filtering device for recycled synthetic resin, characterized in that a round inlet portion (112a) is formed in the inlet (112) at a portion where the flow direction of the resin is changed from the inlet portion through which the synthetic resin flows to the filtering portion (113).
In claim 4,
A foreign matter filtering device for recycled synthetic resin, characterized in that each of the dispersed discharge passages (115) is formed with a buffer bending portion (115a) that bends the path through which the filtered synthetic resin is discharged to induce the synthetic resin to flow without colliding.
In claim 6,
The filtration cylinder 111 is characterized by being provided with a cylinder cover 116 that supports the wire mesh 113b and the mesh filter 113a while forming one end of the wire mesh installation groove 111a and the filter installation groove 111b. A foreign matter filtration device for recycled synthetic resin.
In claim 9,
The cylinder cover (116) is a foreign matter filtering device for recycled synthetic resin, characterized in that the cylinder cover (116) is provided with a plurality of bolt fastening holes (116a) that are detachable from the filter cylinder (111) by bolts.

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