KR100897836B1 - Extrusion molding apparatus for discharging a multi-layer structure inside the mold and an extrusion molding method using the same - Google Patents

Abstract

According to the present invention, a plastic sheet having a multi-layered structure in which waste synthetic resins such as waste vinyl in rural areas are subjected to a primary melting and extrusion process to be extruded into an inner layer material of a sheet while simultaneously extruding recycled resin to wrap up and down the inner layer. In particular, by discharging after extruding a multi-layered extrusion in the mold, the plastic sheet material can be used as a substitute for wood at a low cost in terms of increasing the warpage, rigidity, durability and weather resistance of the plastic sheet. It is about technical thought.

The plastic sheet provided herein can be used as exterior panels for flooring, flooring, container flooring, pedestals of logistics loading floors, flooring of aviation and ships, flooring floors of cargo vans, etc., especially waste vinyls and waste plastics generated in farming and fishing villages, By recycling waste synthetic resins generated at various industrial sites, we provide synthetic resin plates that can be useful for industrial use, while recycling waste synthetic resins and reducing environmental pollution caused by waste disposal. The present invention relates to a field of plastic waste recycling, which increases weather resistance and provides a plastic sheet that can be used as a substitute for wood at a low cost.

Extrusion apparatus, salt type, large mold, waste synthetic resin, recycled resin

Description

Extrusion molding apparatus and the extrusion molding method structured multi-floor inside frame}

In the technical field of the present application, waste synthetic resins, such as waste plastics in rural areas, are subjected to primary melting and extrusion processes to be extruded into an inner layer of a sheet, and at the same time, a recycled resin is extruded to a molten outer layer to recycle wastes of a structure surrounding the inner layer. It relates to the technical field.

In particular, our company recycles waste plastics and recycles waste plastics by recycling waste vinyls and plastics generated in farming and fishing villages, and waste plastics generated in various industrial sites. To reduce the environmental pollution caused by increasing the durability and weather resistance of the plates so that they can be recycled to industrial useful resources, and to provide a plastic plate that can be used as a substitute for wood at a low price.

In the present application, in order to increase the durability and weather resistance of the plastic sheet, the extrusion molding process of forming the multilayer structure of the molten resin forming the inner layer and the outer layer in the mold is completed and discharged in the mold, so that the plastic sheet may have the flexibility, rigidity, durability, and the like. The present invention relates to a technical idea to increase weather resistance and to provide a plastic board that can be used as a substitute for wood at a low price.

The plastic sheet provided herein can be used as exterior panels for flooring, flooring, container flooring, pedestals of logistics loading floors, flooring of aviation and ships, flooring floors of cargo vans, etc., especially waste vinyls and waste plastics generated in farming and fishing villages, By recycling waste synthetic resins generated in various industrial sites, it provides a synthetic resin board that can be usefully used in industry.

Conventionally, flooring and building materials have been provided using waste synthetic resins, but products using waste synthetic resins appear to be of good quality at first, but plastic boards have passed through the extreme heat of summer, heat, and winter in Korea, where seasonal changes are severe. Torsional phenomenon, unevenness of lamination, unevenness of surface color, and the like.

As a technology related to conventional synthetic resin plate material, Patent No. 645935 is a bottom material of a container used for the transportation of cargo using cargo transportation means such as aviation, ships, freight cars, etc. It has an outer element is molded in conjunction with the adjacent bottom surface of the container is installed in association with, and has a supplementary element filled in the foaming process by using a recycled PE in the hollow of the outer element and on both sides in the longitudinal direction of the outer element There is disclosed a technique for providing a container flooring for freight transportation comprising a coupling element coupled to the adjacent and female and male, but the technique is irregular in the supply of raw materials to the die to form the inner and outer elements The thickness of the flooring material of the plate-like body extruded through the dies is not uniform The problem is that the core is formed due to high partial condensation, and the plate-shaped body in which the inner and outer elements are polymerized is cured due to the imbalance of the raw material supplied to the die, so that the central part is extruded thinly compared to both sides, causing the bending phenomenon like a bow. In addition, there was a problem that bubbles are generated in the process of being melted by high temperature and extruded from the die.

In addition, Patent No. 818342 patent technology for obtaining a synthetic resin sheet extrudes a synthetic resin panel that is used for interior panels, flooring, container flooring, pedestal of the distribution rack, flooring of aviation and ships, flooring of the loading box of trucks, etc. An extrusion molding apparatus, which is capable of forming a raw material extruded from the first extruder with an inner resin body, and a raw material extruded from the second extruder with an external resin body to form a double extrusion synthetic resin panel. Although disclosed, the technology is provided that the inner resin contents extruded from the first extruder is exposed to the outside outside the extrusion mold and the outer resin contents extruded from the second extruder are provided to surround the inner resin body, inner and outer layers The difference in temperature occurs between the torsional phenomenon of the plastic sheet, smooth fusion to the inner and outer layers This was a problem that does not occur.

The present application was devised in view of the problems of the prior art as described above, the extruder of the present application extrudes recycled waste synthetic resin from the first extruder to form an inner layer, and in the second extruder extrudes the recycled resin raw material to the outside An extrusion molding apparatus for forming a synthetic resin sheet by forming a layer to wrap up and down an inner layer, wherein the mold apparatus is provided to have a structure divided into a preliminary mold structure and a main mold structure. It receives the inner layer melt resin extruded from the extruder and sends it to the main mold. One side of the preliminary mold receives the outer layer melt resin extruded from the second extruder and divides it up and down in the preliminary mold to the outer layer melt resin. The main mold has a first extrusion part, a second extrusion part, and a third extrusion part, and has a first extrusion part. And the second extrusion part and the third extrusion part are extruded in a multi-layered structure under the same heating and pressurizing conditions, and the torsion of the plate due to the temperature difference between the inner and outer layers of the synthetic resin sheet, or the fusion between the inner and outer laminated parts An object of the present invention is to provide an extrusion molding apparatus and an extrusion molding method using the same.

In addition, the extrusion molding machine of the present application is provided with a thickness adjusting bolt for controlling the thickness of the extrusion layer of the molten resin in each of the first extrusion part, the second extrusion part and the third extrusion part of the main mold to uniform the thickness of the synthetic resin sheet produced It provides the function to control, and also provides the extrusion molding device of synthetic resin sheet that can arbitrarily adjust the width of the synthetic resin sheet produced by installing a width adjusting bolt to adjust the width of the molten resin at both ends of the main mold discharge portion It has a purpose.

In order to obtain a synthetic resin sheet herein, an extrusion molding machine includes a heater and extrudes recycled waste synthetic resin from the first extruder to form an inner layer, and in the second extruder, extrudes recycled resin raw material to form an outer layer to form an inner layer. The basic technology of the extrusion molding apparatus provided to obtain a synthetic resin sheet with a structure to wrap up and down may be applied as it is previously disclosed.

The main feature of the present invention is a structure in which the synthetic resin sheet is obtained by melting and extruding waste synthetic resins to be recycled into an inner layer and melting and extruding recycled water support material as an outer layer to obtain an inner layer up and down. As a means for achieving this, the melt extrusion conditions between the layers are changed, and the torsion of the synthetic resin sheet, which is a product, is generated, or the problem between the laminated portions between the inner layer and the outer layer is improved. The molding machine has a structure divided into a preliminary mold and a main mold, and the preliminary mold is provided as a rectangular hexahedron and has a first extrusion hole for receiving the inner resin melt extruded from the first extruder to the front center and sending it to the main mold. One side of the mold is a melted resin for the outer layer that is extruded from the second extruder to the second extruded hole. Being the second extruding hole is provided so as to have the third and fourth extrusion coextruded into a ball split structure which is divided into upper and lower sides of the first coextruded position within the pre-mold.

Meanwhile, the main mold has a first extrusion part, a second extrusion part, and a third extrusion part, and extrudes the inner layer through the first extrusion part, and extrudes the outer layer through the second extrusion part and the third extrusion part to form an inner layer, A synthetic resin sheet having a structure wrapped below is obtained, but the molten resin discharged through the first extrusion hole of the preliminary mold flows into the fifth extrusion hole of the main mold and is diffused and extruded in a fan shape to the first extrusion part of the main mold, and is preliminary. The molten resin discharged through the third extrusion hole of the mold flows into the sixth extrusion hole of the main mold, diffuses into a fan shape to the second extrusion portion of the main mold, and is extruded, and is discharged through the fourth extrusion hole of the preliminary mold. The melted resin is introduced into the seventh extrusion hole of the main mold, spreads out to the third extrusion portion of the main mold in a fan shape, and is extruded to form an inner layer and an outer layer resin. The invention confirmed that it is possible to achieve the object of the present application by the configuration of the extrusion to achieve a multi-layer structure on the inside to complete.

In the extrusion molding apparatus of the present application, each of the first extrusion part, the second extrusion part, and the third extrusion part of the main mold is provided with a thickness adjusting bolt for adjusting the thickness of the extrusion layer of the molten resin, and also the amount of the discharge part of the main mold. The side portion is provided with a width adjusting bolt for adjusting the width of the molten resin extrusion layer.

Therefore, in the present invention, the extruder includes a heater and extrudes recycled waste synthetic resin from the first extruder to form an inner layer, and in the second extruder, extrudes recycled resin raw material to form an outer layer to wrap the inner layer up and down. In the extrusion molding method provided to obtain a synthetic resin sheet with a structure, it has a configuration divided into the pre-mold and the main mold provided herein, and receives the molten resin for the inner layer through the first extrusion hole of the pre-mold to the main mold And the molten resin for the outer layer is sent to the main mold through the third extrusion hole and the fourth extrusion hole of the preliminary mold, and then extruded under the same conditions in the first extrusion part, the second extrusion part, and the third extrusion part of the main mold. Obtaining a synthetic resin sheet without twisting of the plate due to temperature difference between the inner and outer layers, or fusion between the inner and outer layers. It is possible.

In addition, in the extrusion molding method of the present invention, when the pre-processing extruder is additionally installed at the first stage of the first extruder for extruding the waste synthetic resins to be recycled, the waste synthetic resins melt when the waste synthetic resins are melted and sent to the first extruder. The present invention discloses an extrusion molding method in which a high quality synthetic resin sheet can be obtained by first removing water vapor or gas generated while being sent to a first extruder.

Hereinafter, embodiments of the present invention for implementing specific technical ideas of the present invention will be described in detail with reference to the accompanying drawings.

The present application has the effect of providing a plastic sheet by melting and extruding the upper and lower portions of the waste synthetic resins such as waste vinyl in rural areas to the sheet material through the primary melting and extrusion process and at the same time to the recycled resin.

The plastic sheet provided herein can be used as exterior panels for flooring, flooring, container flooring, pedestals of logistics loading floors, flooring of aviation and ships, flooring floors of cargo vans, etc., especially waste vinyls and waste plastics generated in farming and fishing villages, By recycling waste synthetic resins generated at various industrial sites, the synthetic resin sheet can be usefully utilized in the industry, thereby recycling waste synthetic resins and reducing environmental pollution caused by waste emission.

The plastic sheet provided in the multi-layered structure of the present invention solves the problem of the warpage phenomenon of the plastic sheet and the poor fusion at the inner and outer layers of the laminated sheet due to the temperature difference between the inner and outer layers in the conventional product, so as to be a high-quality plastic sheet It increases rigidity, durability and weather resistance, and has the effect of providing a plastic sheet that can be used as a substitute for wood at a low price.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail. Before describing the present invention with reference to the drawings, the terms or words used in the specification or claims of the present application are limited to ordinary or dictionary meanings. It is not to be interpreted by the present invention, and the inventor described the concept based on the principle that the concept of terms can be properly defined and used to explain his invention in the best way. It should be interpreted comprehensively in terms and meanings consistent with

1 is a plan view showing a schematic configuration of an extrusion molding machine for obtaining a synthetic resin sheet provided in the present application, Figure 2 is to show the configuration of the pre-mold and the main mold, the core technical configuration of the present application,

The schematic configuration of the extruder shown in FIG. 1 is a plan view showing the connection of a raw material supply extruder and a molding apparatus which is commonly used to obtain a synthetic resin injection product or an extrudate. First, the present invention supplies a support material for molding a synthetic resin sheet. The extrusion line can be basically composed of the first extruder 1 and the second extruder 2, the raw material supplied from the first extruder (1) is an internal melt resin and is supplied from the second extruder (2) The raw material may be used as an external molten resin. First, the waste synthetic resin material is first supplied to the hopper 1 (3) provided on one side of the first extruder 1 and the hopper 2 (4) provided on one side of the second extruder 2. The raw material is supplied to the recycled resin raw material to be transferred to the preliminary mold 10 connected to the distal end of the conveying screw 5, wherein the first extruder 1 and the second extruder 2 are plate heaters on the outer surface of the conveying screw 5. (6) install multiple in the form of a ring The raw material is transferred to the molten synthetic resin material transferred by the transfer screw, and the temperature of the plate heater 6 is controlled according to the state of the waste synthetic resin or recycled resin supplied to the hoppers 1, 2 (3, 4). It is possible to provide a foaming agent by mixing the blowing agent inside the raw material as necessary and melted.

At this time, when the waste synthetic resin raw material supplied to the hopper 1 (3) of the first extruder 1 is a low-grade product in which soil or foreign substances are mixed, it is melted in the first extruder and water vapor or a gas layer is generated during the transfer through the transfer screw 5. The gas layer may cause defective products of the synthetic resin sheet. In addition, a pretreatment melt extruder (7) is additionally installed in the previous stage of the first extruder (1) to put waste synthetic resins to be recycled into the hopper 3 (9). In the case of including the configuration of pre-melting by using the heater 8 or the ring heater to be sent to the first extruder 1, it is possible to obtain a high-quality synthetic resin sheet using any low-grade waste synthetic resin raw material.

Figure 2 is intended to show the coupling structure of the preliminary mold 10 and the main mold 50 showing the basic principle of the present technical configuration, Figure 2a shows a perspective view of a configuration in which the preliminary mold and the main mold is combined, FIG. 2B illustrates a perspective view of a configuration in which the preliminary mold and the main mold are separated, and FIG. 2C illustrates a rear perspective view of the opposite side of the perspective view of FIG. 2B.

Characteristic technical configuration of the pre-mold (10) and the main mold 50 to be provided herein is a first extrusion hole (located in the center of the pre-mold 10 melt resin for extrusion from the first extruder 1 ( 11) is sent to the fifth extrusion hole 15 of the main mold 50, the molten resin for the outer layer extruded from the second extruder (2) is received by the second extrusion hole 12 provided on the side of the preliminary mold The preliminary mold is divided into the third extrusion hole 13 and the fourth extrusion hole 14, and the third extrusion hole 13 is discharged into the sixth extrusion hole 16 of the main mold, and the fourth extrusion hole ( 14) The effluent is sent to the seventh extrusion hole 17 of the main mold, and the main mold 50 is discharged to the synthetic resin sheet by extruding the molten resin for the inner layer and the molten resin for the outer layer in a multilayer structure under the same conditions. It is a technical configuration to be made, the reference numeral 20 denotes a molten resin for the outer layer extruded from the second extruder (2) A coupling member 20 intended to connect to a second extrusion hole 12 in the side of the non-metal mold.

3 is a view showing a configuration in a state in which the side cover plate 34 is removed in order to show the internal configuration of the main mold 50, which is a core technical configuration of the present application, in FIG. 3A is a perspective view, and in FIG. 3B It shows a plan view of the main mold, Figure 3c shows a side view of the main mold, Figure 3d is a partial cutaway perspective view to show the interior of the main mold.

The main mold provided herein may be provided as four mold plates having a thickness of about 3 to 5 cm, for example, between the first mold plate 31 and the second mold plate 32. The molten resin introduced through the six extruded holes 16 is extruded to form the second extruded portion 42 to form an outer layer while being fan-shaped as shown by the dotted line in FIG. 3B, and the second mold plate 32 and Between the third mold plate 33, the molten resin introduced through the fifth extrusion hole 15 of the main mold is fan-shaped and extruded to form the first extrusion part 41 to form an inner layer, and the third mold plate. Between the 33 and the fourth mold plate 34, the molten resin introduced through the seventh extrusion hole 17 of the main mold is fan-shaped and is extruded to form the third extrusion part 43 to form an outer layer. It is shown.

The thickness of each of the first extrusion part 41, the second extrusion part 42, and the third extrusion part 43 may be adjusted during extrusion while forming a multilayer structure in the main mold 50 through the side view of the main mold of FIG. 3C. The second extruded part 42 and the third extruded part 43 have a close contact bar 1 (45, 45 ') for thickness control and are connected to the thickness adjusting bolts 1 (44, 44'), respectively. By pushing or pulling the contact bars 1 (45, 45 '), the melt flow rate of the second extrusion part 42 and the third extrusion part 43 can be adjusted, and the first extrusion part 41 and The total thickness of the plate extruded from the second extrusion part 42 and the third extrusion part 43 is connected to the thickness adjusting bolts 2 (46, 46 '), respectively, to push or pull the contact bars 2 (47, 47'). It shows that the overall thickness of the molten resin can be adjusted by zooming.

4 is to show the function of controlling the thickness and width of the synthetic resin plate produced in the main mold of the present application, Figure 4a is a perspective view of the main mold, Figure 4b is to show an exploded perspective view of the main mold. .

The composition for uniformly adjusting the thickness of the synthetic resin sheet produced herein is a plate extruded from the first extrusion unit 41, the second extrusion unit 42 and the third extrusion unit 43 as described in FIG. The thickness of the molten resin can be adjusted primarily by pushing or pulling the contact bars 2 (47, 47 ') by the thickness adjusting bolts 2 (46, 46'), and finally, to increase the smoothness of the product. The thickness is adjusted while discharging the synthetic resin sheet at the end of the mold 50, the discharge interval having a control interval 53 for moving the upper control shaft 51 and the lower control shaft 52 up and down, After moving up and down between the control section 53 to determine the desired separation interval can be adjusted to be extruded to the desired thickness by fastening the fixing bolt 1 (54), also configured for adjusting the width of the synthetic resin plate produced herein In both sides of the discharge part of the main mold 50 The adjusting clamp 55 is provided, and the position of the clamp 55 can be moved to the right and right, and the fixing bolt 2 (56) can be fixed at the desired position to fix the clamp 55 position. A close contact bar 3 (57) may be provided to adjust the width while discharging the synthetic resin sheet.

As described above, the present application is to produce a multi-layer structure by melt extrusion of the waste synthetic resin raw material or recycled resin raw material by a conventional method, the product produced due to different melt extrusion conditions between the inner layer and outer layer of the plate material Torsional phenomena occur or to improve the problems occurring between the laminated portion between the inner layer and the outer layer, the contents shown in the drawings are only one preferred embodiment for achieving the purpose and the present application It is to be understood that there are various equivalents and variations that can be substituted for them at the time of the present application because they do not represent all of the technical ideas of the present invention.

In addition, in the drawings shown in Figures 2 to 4 described above with respect to the preliminary mold and the main mold as a feature of the technical configuration of the present invention, the heater line for heating the temperature inside the mold is not shown in consideration of the complexity of the mold A plurality of hot wires are built-in and transported between the first mold plate 31, the second mold plate 32, the third mold plate 33, and the fourth mold plate 34 of the primary mold and the main mold The raw material is transferred in a molten state, and the temperature of the heater can be adjusted to allow the temperature to be adjusted according to the characteristics of the resin used. Also, each mold plate of the preliminary mold and the main mold (31, 32, 33, 34) Description of a number of bolts and nuts, etc. for coupling between them is omitted, but these fastening structures for coupling them is a technique known in the art that has been conventionally used.

1 is a plan view showing a schematic configuration of an extruder for obtaining a synthetic resin sheet in the present application.

2: Combination configuration of the preliminary mold and the main mold in the present application.

3 is an internal configuration diagram of the main mold in the present application.

4 is an external view of the main mold in the present application.

*** Explanation of symbols for main parts of drawing ***

1: first extruder 2: second extruder

3: Hopper 1 4: Hopper 2

5: Transfer screw 6: Plate heater 1

7 Pretreatment Melt Extruder 8 Plate Heater 2

9: hopper 3 10: preliminary mold

11: first extrusion hole 12: second extrusion hole

13: 3rd extrusion hole 14: 4th extrusion hole

15: 5th extrusion hole 16: 6th extrusion hole

17: 7th extrusion hole 20: coupling member

31: first mold plate 32: second mold plate

33: third mold plate 34: fourth mold plate

35: side cover plate 41: first extrusion part

42: second extrusion part 43: third extrusion part

44,44 ': Thickness adjusting bolt 1 45,45': Close contact bar 1

46,46 ': Thickness adjusting bolt 2 47,47': Close contact bar 2

50: main mold 51: upper adjustment shaft

52: lower adjustment shaft 53: between adjustment

54: fixing bolt 1 55: width adjustment clamp

56: fixing bolt 2 57: contact bar 3

Claims (5)

The extruder has a built-in heater and extrudes recycled waste synthetic resin from the first extruder to form an inner layer, and the second extruder extrudes recycled resin raw material to form an outer layer to wrap the inner layer up and down. In the extrusion molding apparatus provided to obtain a sheet material, Extrusion mold 100 has a configuration that is divided into a pre-mold (10) and the main mold (50), The preliminary mold 10 is provided as a rectangular hexahedron and has a first extrusion hole 11 which receives the molten resin extruded from the first extruder 1 to the front central portion and sends the molten resin to the main mold. The molten resin extruded from the extruder 2 is received by the second extrusion hole 12, and the second extrusion hole 12 is divided into the upper and lower portions of the first extrusion hole 11 in the preliminary mold 10. It is provided to have a structure that is divided into a third extrusion hole 13 and the fourth extrusion hole 14, The main mold 50 has a first extrusion unit 51, a second extrusion unit 52, and a third extrusion unit 53, and extrudes the inner layer through the first extrusion unit 51 and the second extrusion unit ( 52) and the outer layer through the third extrusion unit 53 to provide a synthetic resin plate of the structure surrounding the inner layer up and down, but the molten resin discharged through the first extrusion hole 11 of the preliminary mold (10) Flows into the fifth extrusion hole 15 of the main mold 50, is extruded from the first extrusion portion 41 of the main mold 50, and discharged through the third extrusion hole 13 of the preliminary mold 10. The melted resin is introduced into the sixth extrusion hole 16 of the main mold 50 and extruded from the second extrusion portion 42 of the main mold 50, and the fourth extrusion hole 14 of the preliminary mold 10. The molten resin discharged through the inlet flows into the seventh extrusion hole 17 of the main mold 50 and is extruded from the third extrusion part 43 of the main mold 50. Structured and extruded Extrusion apparatus of the synthetic resin sheet material, characterized in that the lock is provided. The method of claim 1, In the main mold 50, a multi-layer structure is formed so that each of the first extrusion part 41, the second extrusion part 42, and the third extrusion part 43 has a close contact bar for controlling the thickness of the extrusion layer of the molten resin. Extrusion apparatus of a synthetic resin sheet, characterized in that provided in connection with the thickness adjustment bolt connected to the upper, lower of the main mold. The method of claim 1, Both sides of the discharge part of the main mold 50, the width control clamps 55, 55 'is provided in connection with both ends of the main mold in order to control the width of the extrusion layer of the molten resin, the extrusion molding apparatus of the synthetic resin sheet . The extruder has a built-in heater and extrudes recycled waste synthetic resin from the first extruder to form an inner layer, and the second extruder extrudes recycled resin raw material to form an outer layer to wrap the inner layer up and down. In the extrusion molding method provided to obtain a sheet material, Extruder has a configuration divided into a pre-mold (10) and the main mold (50), The molten resin discharged through the first extrusion hole 11 of the preliminary mold 10 flows into the fifth extrusion hole 15 of the main mold 50, and then from the first extrusion portion 41 of the main mold 50. The molten resin that is extruded and discharged through the third extrusion hole 13 of the preliminary mold 10 flows into the sixth extrusion hole 16 of the main mold 50 to form the second extrusion portion of the main mold 50 ( The molten resin, which is extruded from the die 42, and discharged through the fourth extrusion hole 14 of the preliminary mold 10, flows into the seventh extrusion hole 17 of the main mold 50 to form a third mold of the main mold 50. Extruded extrusion method of the synthetic resin sheet characterized in that it is provided to include a configuration that is extruded from the 43 to be extruded by forming a multi-layer structure in the main mold. The method of claim 4 A pretreatment extruder 7 is additionally installed at a previous stage of the first extruder 1 for extruding waste synthetic resins to be recycled to melt the recycled synthetic resins to be transported to the first extruder 1. Extrusion molding method of a synthetic resin sheet.

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