KR20200060124A - Scrap regenerating device for plastic film production system - Google Patents

Abstract

The present invention relates to a scrap regenerating device, and more particularly, to a scrap processing device capable of efficiently regenerating scrap discharged when plastic is extruded and produced by using a plastic film production system. According to the present invention, the scrap regenerating device for the plastic film production system includes: a pipe through which scrap is introduced; a body having an upper side connected with the pipe to communicate with the pipe, and having a passage formed in the body; a connection member coupled to a lower side of the body to communicate with the body; and a pump coupled to one side of the connection member to provide a pushing force toward an inside of the connection member, wherein the connection member communicates with a hopper coupled to the body.

Description

Scrap recycling device for plastic film production system {SCRAP REGENERATING DEVICE FOR PLASTIC FILM PRODUCTION SYSTEM}

The present invention relates to a scrap recycling apparatus, and more particularly, to a scrap processing apparatus capable of efficiently regenerating scrap discharged when plastic is extruded using a plastic film production system.

Extrusion molding or injection molding is used to manufacture a plastic material into a desired type of plastic product. When such extrusion or injection molding, incidentally, a part that cannot be included in the finished product is generated, and this part is called a scrap, and must be removed prior to production of the finished product, for example, in the case of film extrusion molding, before being wound up as a finished product. . In the case of plastic film extrusion molding to remove scrap, both sides of the plastic film exiting the extruder are cut into portions.

The most expensive part of plastic molding is the cost of plastic materials. Therefore, in the production of scrap, waste plastic is costly to the manufacturer, and socially, the cost of waste disposal and the environmental burden of waste cannot be avoided.

Therefore, there is a great interest in ways to recycle these scraps, and several recycling methods have appeared. As part of this, these scraps are pulverized and melted to pelletize. In order to pelletize, a certain temperature must be applied to the plastic. In this case, the plastic may deteriorate due to heat or undergo changes in physical properties. In addition, in this case, there is a problem that it is complicated because a separate process must be performed.

Accordingly, the present invention is to provide a device that can be directly used in the plastic film production system itself without going through a separate melting or regeneration circuit for reuse of plastic.

Registered Patent Publication No. 10-0877872 (Registration date: 2009.01.02)

The present invention has been made to solve the above-mentioned problems,

It is an object to provide a scrap recycling apparatus capable of recycling scraps in a simple process.

In addition, there is another object to provide a scrap recycling apparatus that can be directly applied to a plastic film production system without going through a separate melting process.

In addition, there is another object to provide a scrap recycling apparatus that can reduce the cost of plastic materials and significantly reduce the environmental burden such as waste disposal.

Another object is to provide a scrap reproducing apparatus that can easily reproduce scrap by arranging each configuration in an optimal position.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned are clearly understood by a person having ordinary knowledge in the technical field to which the present invention pertains (hereinafter referred to as a 'normal engineer') from the following description. It could be.

To achieve the object of the present invention as described above, and to perform the characteristic functions of the present invention described later, the features of the present invention are as follows.

A scrap recycling apparatus for a plastic film production system according to an embodiment of the present invention includes: a pipe through which scrap is introduced; A body in which the pipe is connected to the upper side so as to communicate with the pipe and a passage is formed therein; A connecting member communicated with the lower side of the body; And a pump coupled to one side of the connecting member to provide a pushing force into the connecting member, wherein the connecting member is formed to communicate with a hopper coupled to the body.

According to one embodiment of the invention, the connecting member is mounted to the feed throat of the hopper.

According to an embodiment of the present invention, the connecting member is connected to communicate with a mounting member coupled to the hopper in communication with the lower side of the hopper.

According to one embodiment of the invention, the piping is coupled to the upper side of the body parallel to the horizontal direction.

According to the present invention, a scrap recycling apparatus capable of recycling scraps in a simple process is provided.

In addition, according to the present disclosure, there is provided a scrap recycling apparatus that can be directly applied to a plastic film production system without going through a separate melting process.

In addition, according to the present disclosure, there is provided a scrap recycling apparatus that can reduce plastic material costs and significantly reduce environmental burdens such as waste disposal.

Moreover, a scrap reproducing apparatus capable of easily reproducing scraps by arranging each configuration in an optimal position is provided.

The effects of the present invention are not limited to those described above, and other effects not mentioned will be apparent to those skilled in the art from the following description.

1 shows a schematic view of a plastic film production system,
Figure 2 shows the extrusion zone of the plastic film production system,
Figure 3 shows a slitting zone of a plastic film production system according to an embodiment of the present invention,
Figure 4 shows a top side view of Figure 3,
Figure 5 shows a side view of the shredding unit for scrap according to an embodiment of the present invention,
Figure 6 shows an enlarged view of the fixing portion shown in Figure 5,
7 is a block diagram of a crushing unit according to an embodiment of the present invention,
Figure 8 shows a cross-sectional view of Figure 5 when viewed from the left,
9 shows a movement path of the discharge unit according to an embodiment of the present invention,
10 shows an input unit according to an embodiment of the present invention,
Figure 11 shows a detailed view of the input unit of Figure 10,
12 schematically shows an internal view of an input unit body according to an embodiment of the present invention.

The specific structure or functional descriptions presented in the embodiments of the present invention are exemplified for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms. In addition, it should not be construed as being limited to the embodiments described herein, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Meanwhile, in the present invention, terms such as first and / or second may be used to describe various components, but the components are not limited to the terms. The above terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of rights according to the concept of the present invention, the first component may be referred to as the second component, Similarly, the second component may also be referred to as the first component.

When a component is said to be "connected" or "connected" to another component, it should be understood that other components may be directly connected or connected to the other component, but may be present in the middle. something to do. On the other hand, when a component is referred to as being “directly connected” to or “directly in contact with” another component, it should be understood that no other component exists in the middle. Other expressions for describing the relationship between the components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

Throughout the specification, the same reference numbers refer to the same components. Meanwhile, the terminology used herein is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless otherwise specified in the phrase. As used herein, "comprises" and / or "comprising" refers to the presence of one or more other components, steps, operations and / or elements in which the mentioned component, step, operation and / or element is present. Or do not exclude additions.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in Fig. 1, the plastic film production system 1 includes an extrusion zone 2, a slitting zone 4 and a winding zone 6. In addition, a cooling zone (not shown) for cooling the molded plastic that has passed through the extrusion zone 2 may be provided.

2, the extrusion zone 2 includes a feed section 12, a barrel section 22, and a die section 32. A hopper 13 into which the raw plastic material to be extruded is introduced is formed in the feed part 12. The hopper 13 is formed in a funnel shape and includes an opening 23 having a specific diameter and a feed throat 33 formed smaller than the diameter of the opening 23, and the opening 23 And it is formed extending between the feed throat 33 so that the diameter is reduced. The feed throat 33 communicates with the barrel portion 22.

The barrel portion 22 is formed to rotate by a drive portion 33 formed on the inside of the screw 23 and the screw 23 formed on the outside of the barrel portion 22. In the barrel portion 22, the plastic material injected through the hopper 13 is melted, and the plastic material is configured to be moved from the hopper 13 side to the opposite side by a screw 23.

The die portion 32 is molded into a desired shape by the shape of the die of the molten plastic material discharged from the barrel portion 22. A cooling roll (not shown) that can cool the molded plastic may be provided outside the die part 32.

The molded material that has passed through the extrusion zone 2 passes through the slitting zone 4. The slitting zone 4 is configured to remove uneven ends of the molded plastic discharged in the form of sheets or films. The slitting zone 4 includes a frame 14, a base roll 24, a cutting member 34 and a collecting section 44.

3, a base roll 24 is mounted to the frame 14. The molded plastic film transferred from the extrusion zone 2 passes through the base roll 24.

On the upper side of the base roll 24, a rod 134 is mounted on the frame 14. The frame 14 is formed with a slide hole 114 capable of engaging the rod 134. The slide hole 114 is formed in the form of a long hole that is formed to be long in the direction of movement of the plastic film to stably couple the rod 134 while the rod 134 slides along the slide hole 114 to adjust its position. To make. Therefore, it can be configured to control the point in time when the cutting member 34 described later is in contact with the molded plastic film.

Two cutting members 34 are mounted on the rod 134. The cutting member 34 is mounted at a certain angle toward the plastic film so that both ends of the molded plastic film passing through the base roll 24 can be cut off. Both cut ends are transferred to the collection section 44 as scrap.

4, the collection unit 44 collects the cut scrap. The collection unit 44 is configured to be mounted on the frame 14 so as to be spaced a certain distance from the frame 14. For example, the collection unit 44 may be formed spaced apart from the frame 14 by a connecting pipe 144.

The collection part 44 includes a main pipe 244 and a sub pipe 344. The main pipe 244 is formed substantially perpendicular to the connecting pipe 144. Alternatively, the main pipe 244 is formed perpendicular to the moving direction of the plastic film. On both sides of the main pipe 244, a subpipe 344 formed perpendicular to the main pipe 244 is configured. The main pipe 244 and the sub pipe 344 are both formed to have a hollow. Particularly, according to the present invention, the collection part 44 is formed on the frame 14 of the slitting zone 4 itself to change the direction of movement of the scrap and deliver it to the outside or to the shredding unit by a simple method. Without this, it increases space utilization and simplifies the process.

Scrap cut by the cutting member 34 is introduced into the subpipe 344. In the subpipe 344, the inlet of the scrap is formed at a position lower than the height of the base roll 24 from the ground. In this case, a guide roll (not shown) capable of guiding scrap can be mounted on the frame, or in the case of a scrap that has been lengthened by dropping, the input of the scrap becomes easier because the input of the scrap becomes easier. It is preferably formed lower than the base roll formed at the same height as the molded plastic film.

The sub-pipes 344 are provided on both sides of the main pipe 244 and are configured to collect scraps on both sides, respectively. The scrap that has passed through the subpipe 344 is configured to vertically change the direction of movement, and is configured to move to one side along the longitudinal direction of the main pipe 244. Scraps generated at each side are configured to move by switching in the same direction to meet each other, and as shown in FIG. 4, it can be seen that two scraps S are discharged. The discharged scrap S is transmitted to the cutting unit 220 which will be described later.

In the winding zone 6, the plastic film slitting on both sides in the slitting zone 4 is wound on a winding roll (not shown) as a finished product through a guide roll (not shown).

In addition, the plastic production system 1 according to the present invention may include a scrap recycling apparatus for regenerating slitting plastic films or scraps.

The scrap regeneration device may include a shredding unit 200 and an input unit 400. The crushing unit 200 collects and crushes scraps cut in the slitting zone 4, and the input unit 400 puts the crushed scraps into the hopper 13. According to the present invention, the process is shortened by pulverizing the scraps discharged during molding of the finished product and immediately entering the hopper 13 without having a separate regeneration device or undergoing steps for regeneration (for example, melting of scraps). It provides the effect of cost reduction in terms of labor cost and time as well as material cost.

As shown in Figure 5, the shredding unit 200 cuts the scrap discharged from the slitting zone 4 to a small size and collects the cut scrap. The crushing unit 200 may include a cutting unit 220 and a discharge unit 240.

The cutting unit 220 performs a function of cutting a scrap input into the shredding unit 200 into a small size, and may include a fixing unit 222, a cutting unit 224, and a suction unit 226.

6 and 7, the fixing part 222 fixes the scrap discharged from the slitting zone 4. The fixing part 222 is fixed by sucking the scrap moving in parallel from the upper side of the cutting part 220.

The cutting portion 224 is disposed under the fixing portion 222 to cut scraps flowing through the fixing portion 222. The cutting part 224 disposed under the fixed scrap crushes the input scrap into a small size. For example, the cutting unit 224 may include a pair of cutters with each cutting edge facing each other.

The suction part 226 sucks the cutting scrap cut by the cutting part 224. The scrap crushed in the cutting part 220 or the cutting part 224 moves or falls toward the suction part 226 disposed under the cutting part 220.

Referring to FIG. 8, the discharge unit 240 may include a movement path 242, a pipe 248 and a pump 246. The discharge part 240 is formed on one side of the suction part 226. The passage from the suction portion 226 to the discharge portion 240 is formed so that its cross-sectional area is smaller than the cross-sectional area of the suction portion 226, so that the cut scrap can be moved toward the discharge portion 240 more easily. The movement from the suction part 226 to the discharge part 240 is performed by the operation of the pump 246 disposed on one side of the discharge part 240.

Referring to FIG. 9, a movement path 242 is formed in the discharge unit 240. For example, the movement path 242 may be formed as a circular passage to add acceleration to the cut scrap. The cut scrap is moved along the pipe 248 formed on the upper side of the discharge portion 240 is cut along the movement path 242 formed in the discharge portion 240 by the pump 244. The pipe 248 is connected to the input unit 400 to be described later.

As shown in Figure 10, the input unit 400 is connected to the pipe 248, is fixed to one side of the hopper (13). The input unit 400 includes a body 402, a connecting member 404 and a pump 406.

Referring to FIG. 11, the body 420 includes an inlet 1402, an outlet 2402, and an air outlet 3402. The inlet 1402 has a pipe 248 coupled in the horizontal direction so that it is formed in a direction parallel to the horizontal direction on the upper side of the input unit 400. The outlet 2402 is formed on the lower side of the body 402 so that the scrap passing through the body 402 is discharged. The air outlet 3402 is formed to communicate with the body 402 on the upper surface of the input unit 400 to discharge air introduced from the inlet 1402 together with scrap by the pipe 248 to the outside.

The inside of the body 402 includes a passage 4402 through which the scrap moves. As illustrated in FIG. 12, a passage 4402 may be formed in a spiral shape to guide the movement of the scrap introduced into the body 402 and to adjust the amount and speed of the input scrap.

The lower side or the outlet 2402 side of the body 402 is coupled to the connecting member 404. The connecting member 404 and the outlet 2402 are formed to communicate. Therefore, the scrap that has passed through the passage 4402 and has reached the outlet 2402 side is introduced into the connecting member 404.

The connecting member 404 is also formed in communication with the hopper 13. In particular, the connecting member 404 is connected to communicate with the feed throat 33 of the hopper 13. More preferably, it is formed to be connected to the mounting member 43 formed on the lower side of the feed throat 33 of the hopper 13. The mounting member 43 includes an empty space (not shown) therein, and a hole 53 is formed to communicate the empty space with the connecting member 404 so that the connecting member 404 can be mounted in communication. Accordingly, the scraps flowing out of the outlet 2402 and flowing into the connecting member 404 are transferred to the hopper 13 side or the extrusion zone 2 side, so that they can be mixed with the plastic material to be molded and used again as a molding material.

The pump 406 is mounted on the lower side of the body 402 or on the outlet 2402 side. The pump 404 provides the force to move the passage 4402 and push the cut scrap reaching the lower side toward the hopper 13 or the extrusion zone 2.

Therefore, 100% scrap recycling rate can be achieved through such a configuration. By omitting the melting process, a change in physical properties, which is a problem occurring in the melting process, can be removed and recycled immediately after crushing, thereby simplifying the process and reducing material costs as well as labor, time, and money spent on recycling.

The inventor of the present invention has conducted a study on the connection relationship with the extrusion zone (2) so that the slitting scrap can be recycled immediately. When the scrap cut in the form of a chip is directly put into the hopper 13, it has been found that it is difficult to put it into the hopper 13. This means that the pipe 248 is directly connected to the hopper 13, but when the pipe 248 is directly connected to the hopper 13, the input of scrap is not smooth. As another experiment, in the case of inputting the raw material together with the raw material on the upper side of the hopper 13, the input was not easy, and even when the input port was formed on the side of the hopper 13, the input was not made easily. In addition, even in the case of installing a separate input unit as in the present invention, the input was not made smoothly even when attempting to input the collected scrap near the upper or middle portion of the hopper 13 or the feed throat.

Therefore, the present inventors have formed an additional flow path in the vicinity of the feed throat 53 or more preferably under the feed throttle so that the collected scrap is input, and that the input into the extrusion zone 2 is remarkably well done. Discover and came to the present invention.

In addition, it was found that the input of the scrap is made remarkably smoothly by forming a separate spiral unit-shaped flow path by forming a separate input unit 400 instead of directly introducing the collected scrap into the extrusion zone 2. .

The present invention described above is not limited by the above-described embodiments and accompanying drawings, and various substitutions, modifications, and changes are possible within the scope of the present invention without departing from the technical spirit of the present invention. It will be obvious to those who have the knowledge of.

1: plastic film production system
2: Extrusion zone
4: slitting area
6: Winding area
12: feed section
13: Hopper
14: frame
22: barrel
24: base roll
34: cutting member
44: collection
200: shredding unit
220: cutting section
240: outlet
400: input unit
402: body
404: connecting member
406: pump

Claims (4)

Piping through which scrap is introduced;
A body in which the pipe is connected to the upper side so as to communicate with the pipe and a passage is formed therein;
A connecting member communicated with the lower side of the body; And
The pump is coupled to one side of the connecting member to provide a pushing force into the connecting member.
The connecting member is a scrap recycling apparatus for a plastic film production system that is formed to communicate with a hopper coupled to the body. The scrap reproducing apparatus according to claim 1, wherein the connecting member is mounted to the feed throat of the hopper. The method according to claim 1, The connecting member,
A scrap reproducing apparatus that is connected to communicate with a mounting member coupled to the hopper in communication with the lower side of the hopper. The scrap recycling apparatus according to claim 1, wherein the piping is coupled to an upper side of the body in parallel to a horizontal direction.

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