KR101746754B1

KR101746754B1 - Screen changer for synthetic resine extruder

Info

Publication number: KR101746754B1
Application number: KR1020150179167A
Authority: KR
Inventors: 염정호; 임점기; 박희대
Original assignee: 박철우
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2017-07-10
Also published as: KR20170071166A

Abstract

The present invention relates to a screen replacing apparatus for a synthetic resin extruder for improving workability and productivity by allowing a screen to be changed without interruption of a resin extrusion operation. To this end, a resin inlet is formed on the upper side, A cylindrical die housing having an outlet formed therein; A sliding plate mounted on the discharge side of the extrusion of the die housing so as to be slidable in the left and right direction and having a size two times or more larger than the inner surface area of the mounting position of the die housing and partly projecting out of the mounting position of the die housing; A plurality of extrusion holes formed on the sliding plate and having a size smaller than an inner surface area of the sliding plate mounting position of the die housing; The slide plate has a stroke corresponding to an interval between two replacement screens mounted on the sliding plate. The sliding plate is connected to one end of the sliding plate, and the sliding plate slides in the left and right directions of the sliding housing, And a screen replacement cylinder in which one of the two replacement screens is operated to come out of the die housing.

Description

Technical Field [0001] The present invention relates to a screen changer for a synthetic resin extruder,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen replacing apparatus for a synthetic resin extruder, and more particularly, to a screen changing apparatus capable of changing a screen without interrupting the operation of extruding a synthetic resin, thereby improving workability and productivity.

The amount of waste synthetic resin that is generated annually by industrial development is increasing rapidly, and environmental pollution problem is increasing.

These waste synthetic resins have difficulty in stabilizing the landfill prematurely due to their decomposition resistance, and some thermal energy can be utilized in the treatment by incineration, but they cause a lot of economic losses and also cause toxic gases such as dioxins, I have to.

Therefore, the recycling of waste synthetic resin plays an important role in industrial development because it recycles resources in Korea, which not only solves the environmental pollution problem of the country but also lacks natural resources. Therefore, it is urgently required to develop recycling technology that can solve this problem. , And a variety of support systems are being operated for recycling waste synthetic resin and waste synthetic resin.

Hereinafter, a method for regenerating waste plastic vinyl which is currently in use will be briefly described.

The used waste synthetic resin is collected and sent to a recycling plant, which is then put into a crusher and crushed.

Thereafter, the foreign matter such as soil buried in the pulverized waste synthetic resin is removed. In general, the foreign substance is removed by using the cleaning device.

Next, the washed waste synthetic resin is dewatered or dried, and then put into an extruder to form a resin material, whereby various recycled resin products can be manufactured.

Recycled synthetic resin extrusion apparatuses are disclosed in various forms, such as a registrant's draft 20-232916 and a registrant's draft 20-261979.

Registration Utility Model No. 20-232916 'Multistage extrusion type synthetic resin extruder' Registered Practical Utility Model No. 20-261979 'Multistage extruder for synthetic resin filler'

However, in the case of the synthetic resin extrusion apparatus according to the prior art, the synthetic resin is extruded through the dies in a state in which various foreign substances contained in the molten resin are not properly filtered, so that the regenerated synthetic resin raw materials contain foreign substances, There is a disadvantage that the possibility of inclusion of foreign substances becomes greater when recycling waste synthetic resin.

For this purpose, attempts have been made to remove foreign substances contained in the molten resin by applying a screen to the synthetic resin extrusion apparatus. However, when removing the clogged foreign substances or replacing the screen, the operation of the synthetic resin extrusion operation is stopped, Sex and productivity were inevitable.

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a screen replacement apparatus for a synthetic resin extruder which is capable of replacing a screen without interrupting a synthetic resin extrusion operation to improve workability and productivity, .

In order to accomplish the above object, according to a preferred embodiment of the present invention, there is provided a screen replacing apparatus for a synthetic resin extruder,

A cylindrical die housing having a resin inlet formed at an upper side thereof and an outlet for an extrudate at a lower portion thereof;

A sliding plate mounted on the discharge side of the extrusion of the die housing so as to be slidable in the left and right direction and having a size two times or more larger than the inner surface area of the mounting position of the die housing and partly projecting out of the mounting position of the die housing;

A plurality of extrusion holes formed on the sliding plate and having a size smaller than an inner surface area of the sliding plate mounting position of the die housing; And

The sliding plate has a stroke corresponding to a distance between two replacement screens mounted on the sliding plate. The sliding plate is connected to one end of the sliding plate, and pushes or pulls the sliding plate to slide in the left- And a screen changing means for operating any one of the plurality of replacement screens to come out of the die housing.

Wherein the replacement screen has a rectangular shape whose length in the left-right direction is longer than the length in the forward-backward direction,

Wherein the two replacement screens are mounted in close contact with the sliding plate,

And the screen replacement means is formed of a cylinder.

A disk-shaped screen mounted in the die housing in a state where a plurality of extrusion holes are formed in the die housing to filter foreign substances while passing the molten resin injected through the resin inlet;

A foreign matter remover attached to a rotating shaft at the center of the upper surface of the disk type screen to sweep foreign matters filtered out of the molten resin by the disk type screen;

A driving motor connected to the lower end of the rotating shaft to transmit power to the foreign object remover; And

A foreign matter outlet formed at a position of the dice housing to communicate with the foreign matter remover and discharging foreign matter swept through the foreign matter remover; and an opening / closing device which is provided in the foreign matter outlet and is automatically opened / closed by pressure generated by rotation of the foreign matter remover And a foreign matter discharging unit as a valve.

The foreign matter removing device is formed to be rounded from the center to the outside and symmetrically formed around the center thereof so as to form an overall waveform so that the foreign matter is pushed outward along the rounded surface by the centrifugal force due to the rotation of the foreign matter removing device, And is discharged through a discharge port.

Wherein the disk-shaped screen is composed of two first screens and two second screens, and is disposed on the upper and lower sides of the die housing, wherein the size of the extrusion holes of the second screen is smaller than the size of the extrusion holes of the first screen, The size of the extrusion hole of the replacement screen is smaller than the size of the extrusion hole of the two screens,

The foreign matter remover includes a first foreign matter remover coupled to the first screen and a second foreign matter remover coupled to the second screen,

And the foreign matter outlet port is formed to communicate with the first foreign matter remover and the second foreign matter remover, respectively.

As described above, the screen exchange apparatus for a synthetic resin extruder according to a preferred embodiment of the present invention can move while being engaged with each other at the mounting position of the die housing when two screens constituting the replacement cylinder are replaced, Since the replacement cylinder located outside the die housing can be replaced after the movement, the continuous process can be performed without interruption of the synthetic resin extrusion operation, which is advantageous in improving workability and productivity.

In addition, when the molten resin passes through the extrusion hole of the disk-shaped screen, the foreign substances contained in the molten resin are blocked by the extrusion hole and can not be discharged downward. The molten resin is swept away by the rounded foreign matter remover rotated on the upper surface of the disk- It is possible to extrude a more pure synthetic resin from which foreign substances have been removed. In the case where the disk-shaped screen is composed of the first screen and the second screen and is disposed above and below the dice housing, Since the size of the extrusion hole of the second screen is smaller than that of the second screen, the foreign matter can be more completely removed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a screen replacing apparatus for a synthetic resin extruder according to a preferred embodiment of the present invention. FIG.
2 is a process flow diagram of a screen replacement process for a synthetic resin extruder according to a preferred embodiment of the present invention;
3 is an exemplary view of a die for a synthetic resin extruder to which a preferred embodiment of the present invention is applied;
Fig. 4 is an exemplary view of a disk-shaped screen applied to the dice of Fig. 2; Fig.
Fig. 5 is a configuration diagram of a foreign matter remover applied to the dice of Fig. 2; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a dice for a synthetic resin extruder according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of a screen replacing apparatus for a synthetic resin extruder according to a preferred embodiment of the present invention, FIG. 2 is a process diagram for replacing a screen changing apparatus for a synthetic resin extruder according to a preferred embodiment of the present invention, Fig. 4 is an exemplary view of a disk-shaped screen applied to the dice of Fig. 2, and Fig. 5 is a diagram illustrating a foreign matter remover applied to the dice of Fig. 2. Fig.

The screen exchange apparatus for a synthetic resin extruder according to the preferred embodiment of the present invention is configured such that the replacement screen 60 is replaceably installed in the dice housing 10 so that the replacement screen 60 can be replaced without interruption in the operation of extruding the synthetic resin do.

To this end, a sliding plate 62 is provided at a position adjacent to the extruded water outlet 12 of the die housing 10 in which the resin inlet 11 is formed at the upper side and the extruded water outlet 12 is formed at the lower portion thereof, A two-screen replacement screen 60 is mounted in parallel on the sliding plate 62, and a screen replacement cylinder 63 is connected to one side of the sliding plate 62.

The sliding plate 62 is formed to have a size twice as large as that of the mounting position of the dice housing 10 and a part of the sliding plate 62 protrudes outside the mounting position of the dice housing 10.

The replacement screen 60 is composed of two screens, each of which is smaller than the inner surface area of the sliding plate mounting position of the dice housing 10 while forming a plurality of extrusion holes 61, and is mounted on the sliding plate 62, .

The screen replacement cylinder 63 has a stroke corresponding to a distance between two replacement screens 60 mounted on the sliding plate 62. The sliding plate 62 is moved in accordance with the contraction / One of the two replacement screens 60 mounted on the sliding plate 62 slides out of the dice housing 10 while sliding in the left and right direction of the dice housing 10. Of course, it is obvious that the ball screw or the mac guide can be substituted for the screen replacement cylinder 63 instead.

At this time, the replacement screen 60 has a rectangular shape whose length in the left-right direction is longer than the length in the front-rear direction, and the two replacement screens 60 are mounted so as to be in close contact with the sliding plate 62.

A disk-shaped screen 20 having a plurality of extrusion holes 23 and 25 formed therein is mounted on the die housing 10 so that foreign substances larger in size can be further separated before the molten resin passes through the replacement screen 60, Type screen 20. The foreign substance filtered by the disk-shaped screen 20 in the molten resin is swept on the rotating shaft 41 at the center of the upper surface of the disk-shaped screen 20 by passing the molten resin injected through the inlet 11, The foreign matter remover 30 may be rotatably press-fitted and fixed and the rotating shaft of the driving motor 40 may be connected to the lower end of the rotating shaft 41 so as to transmit power so as to provide power to the foreign matter removing unit 30. [ have.

A foreign matter discharge port 51 for discharging foreign matter swept through the foreign matter remover 30 may be formed at a position communicating with the lateral foreign matter remover of the dice housing 10. A foreign matter removing device 30 may be provided at the foreign matter discharge port 51, Off valve 52 which is automatically opened or closed by the pressure of the rotation of the valve body 52 so that the foreign matter discharge port 51 and the on-off valve 52 can constitute the foreign matter removing unit 50.

At this time, the foreign material remover 30 is formed to be rounded from the center to the outside and symmetrically formed around the center thereof so as to form an overall waveform, so that the foreign matter is removed by the centrifugal force due to the rotation of the foreign material remover 30, And then discharged out through the foreign matter discharging port 51. [0035]

The disk-shaped screen 20 includes two first screens 22 and two second screens 24 and is disposed on the upper and lower sides of the interior of the dice housing 10, The size of the extrusion hole 25 of the second screen 24 is smaller than the size of the extrusion hole 25 of the second screen 24 and the size of the extrusion hole 61 of the replacement screen 60 is smaller than the size of the extrusion hole 25 of the second screen 24. [ .

The foreign substance remover 30 further includes a first foreign matter remover 32 coupled to the first screen 22 when the disk-shaped screen 20 is composed of the first screen 22 and the second screen 24, And the second foreign material remover 34 coupled to the second screen 24. In this case, the foreign matter outlet 51 is connected to the first foreign object remover 32 and the second foreign object remover 34 Respectively.

In the screen exchanging apparatus for a synthetic resin extruder according to the preferred embodiment of the present invention, the molten resin introduced into the dice housing 10 is first extruded through the extrusion hole 61 of the replacement screen 60, At the same time, it acts to filter the foreign substances contained in the molten resin.

When the replacement screen 60 is clogged or damaged in such a process and the replacement screen 60 needs to be replaced, the screen replacement cylinder 63 is contracted or stretched depending on the position of the sliding plate 62, The replacement screen 60 is pushed or pulled in accordance with the contraction or extension of the screen replacement cylinder 63.

At this time, each of the two replacement screens 60 is formed to have a size smaller than the inner surface area of the sliding plate mounting position of the die housing 10 while a plurality of the extrusion holes 61 are formed, and the length in the left- The sliding plate 62 has a size that is twice or more the size of the inner surface of the dice housing 10 and is located outside the mounting position of the dice housing 10 The two replacement screens 60 move in the dice housing 10 while being overlapped with each other when the sliding plate 62 is moved, so that the extrusion of the molten resin can proceed continuously without interruption, Depending on the contraction or extension of the cylinder 63, one of the replacement screens 60 is located inside the dice housing 10, One replacement screen 60 is allowed to escape to the outside of the dice housing 10.

Accordingly, in the course of continuous extrusion of the synthetic resin, the replacement screen 60 that has escaped to the outside of the dice housing 10 can be removed, the other replacement screen 60 can be mounted again, It is possible to drive the screen replacement cylinder 63 in the opposite direction when the replacement screen 60 needs to be replaced so that the replacement screen 60 which needs to be replaced without interruption of the synthetic resin extrusion can be pulled out to the outside of the dice housing 10, The same procedure is repeated so that the replacement screen 60 can be replaced without interruption in the operation of extruding the synthetic resin.

On the other hand, the molten resin injected into the resin inlet 11 of the dice housing 10 is pushed downward by gravity and the molten resin injection pressure transmitted from the previous stage to be injected into the extrusion holes 23 and 25 of the disk- And the foreign substances contained in the molten resin can not pass through the extrusion holes 23 and 25 of the disk-shaped screen 12 and are caught.

At this time, since the rotation shaft 41 is continuously rotated by receiving the rotational force from the driving motor 40 and the foreign material remover 30 having the waveform pressed into the rotation shaft 41 is rotated together with the rotation shaft 41, Foreign matter that can not escape through the extrusion holes 23 and 25 of the foreign material removing unit 30 is contacted with the foreign material removing unit 30 and is moved along the rounded surface of the foreign material removing unit 30 by the centrifugal force generated by the continuous rotation of the foreign material removing unit 30 A pressure is generated to escape to the foreign matter outlet port 51 formed at the side of the foreign object remover of the dice housing 10 and the open / close valve 52 is opened by this pressure, The foreign matter can be discharged to the outside of the die housing 10 by dropping outwardly through the through hole 51.

When the disk-shaped screen 20 is composed of two pieces of the first screen 22 and the second screen 24 and is fixed on the upper and lower sides of the dice housing 10, the foreign matter caught in the extrusion hole 23 of the first screen 22 The molten resin that has passed through the extrusion hole 23 of the first screen 22 passes through the extrusion hole 25 of the second screen 24 again The size of the extrusion hole 25 of the second screen 24 is smaller than the size of the extrusion hole 23 of the first screen 22 so that the foreign matter having passed through the first screen 22 passes through the second screen 24, And can be removed by the second foreign material remover 34 so that only the pure synthetic resin can be extruded through the second screen 24. [ Since the foreign matter outlet port 51 is connected to both the first foreign matter remover 32 and the second foreign matter remover 34, the foreign matter removed through the first foreign matter remover 32 and the second foreign matter remover 34 passes through the foreign matter outlet And can be discharged to the outside of the die housing 10 through the opening 51.

The molten resin that has exited the second screen 24 comes into contact with the replacement screen 60 provided in the vicinity of the extrusion outlet 12 of the dice housing 10. In the process of passing through the replacement screen 60 Only a small amount of foreign matter is removed by passing through the extrusion hole 61 having a size smaller than the size of the extrusion hole 25 of the second screen 24 so that only the pure synthetic resin from which the foreign substance is removed can be finally extruded, Is a raw material of pelletized synthetic resin after cooling and cutting process.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

10: Dice housing 11: resin inlet
12: extrusion outlet 20: disk-shaped screen
22: first screen 23, 25, 61: extrusion hole
24: second screen 30: foreign matter remover
32: first foreign matter remover 34: second foreign matter remover
40: drive motor 41:
50: foreign matter discharging unit 51: foreign matter discharging port
52: opening / closing valve 60: replacement screen
62: sliding plate 63: screen replacement cylinder

Claims

A cylindrical die housing having a resin inlet formed at an upper side thereof and an outlet for an extrudate at a lower portion thereof; A sliding plate mounted on the discharge side of the extrusion of the die housing so as to be slidable in the left and right direction and having a size two times or more larger than the inner surface area of the mounting position of the die housing and partly projecting out of the mounting position of the die housing; A plurality of extrusion holes formed in the slide plate, and a plurality of extrusion holes formed in the slide plate, the two screws being smaller than an inner surface of the slide housing; A sliding plate having a stroke corresponding to a distance between two replacement screens mounted on the sliding plate and being connected to one end of the sliding plate so that the sliding plate is pushed or pulled so as to slide in the left and right direction of the die housing, And a cylinder-shaped screen replacement means operable to cause either of the two replacement screens to come out of the die housing,
A disk-shaped screen mounted in the die housing in a state where a plurality of extrusion holes are formed in the die housing to filter foreign substances while passing the molten resin injected through the resin inlet; A foreign matter remover attached to a rotating shaft at the center of the upper surface of the disk type screen to sweep foreign matters filtered out of the molten resin by the disk type screen; A driving motor connected to the lower end of the rotating shaft to transmit power to the foreign object remover; And a foreign matter discharge unit which is formed at a position communicating with the foreign matter remover at the side of the die housing and discharges a foreign substance swept through the foreign matter remover, wherein the disk-shaped screen has a first screen and a second screen A second foreign matter remover coupled to the first screen, and a second foreign matter remover coupled to the second screen, wherein the foreign matter remover comprises two screens and is disposed above and below the interior of the die housing, A screen replacement apparatus for a screen,
Wherein the replacement screen has a rectangular shape whose length in the left-right direction is longer than the length in the fore-and-aft direction, and the two replacement screens are attached to the sliding plate so as to be in close contact with each other, Being;
Wherein a size of an extrusion hole of the second screen is smaller than a size of an extrusion hole of the first screen so that a foreign matter passing through the first screen can be filtered by the second screen;
The foreign matter outlet port is formed to communicate with the first foreign matter remover and the second foreign matter remover, and the foreign matter outlet port is provided with an on-off valve that is automatically opened and closed by a pressure corresponding to the rotation of the foreign matter remover, Is automatically discharged from the outlet of the synthetic resin extruder.

delete