KR20240057135A - Multi-purpose vinyl manufacturing method and device using recycled materials - Google Patents

Abstract

The present invention relates to a method and device for manufacturing multi-purpose vinyl using recycled materials.
The present invention for this purpose includes collecting waste vinyl; Transferring the collected waste vinyl to the primary conveyor; Shredding the transported waste vinyl; Transferring shredded waste vinyl to a secondary conveyor; A first drying step to remove foreign substances and remove moisture from the shredded waste vinyl; Secondary drying step of drying with a heater blower; Melting the secondary dried waste vinyl; And it is characterized by comprising the step of extrusion molding the molten waste vinyl.

Description

Multi-purpose vinyl manufacturing method and device using recycled materials{.}

The present invention relates to a method and device for manufacturing multi-purpose vinyl using recycled materials.

Plastic is a material that is easy to process and inexpensive, but waste plastic and waste vinyl are difficult to recycle for various reasons, such as being difficult to decompose in the natural world, harming the surrounding landscape, and causing secondary pollutants such as hydrogen chloride and dioxin when incinerated.

In Korea, along with the development of the petrochemical industry and the global trend, its production is increasing at a significant rate every year, and its production is large enough to be included in the world's top five producing countries.

Korea began to take interest in plastic waste and take legal action when the “Korea Resources Recycling Corporation” was established in 1980 following the enactment of the “Synthetic Resin Waste Disposal Business Act,” and in the 1990s, “Korea Resources Recycling Corporation” was established to promote “resource conservation and recycling.” Act on “Act on Standards for Product Packaging Methods and Materials of Packaging Materials,” etc. are seeking to reduce the source of emissions.

Entering the 2000s, the Producer Responsibility Recycling System (EPR) (January 2003 for paper packs, metal cans, synthetic resin packaging materials, etc.), the Environmental Guarantee System (for electrical and electronic products/automotives in January 2008), and the Waste Charge System (for products using toxic substances and plastics, packaging materials), etc. Various environmental regulations are being strengthened.

324,000 tons of waste vinyl for domestic agricultural use (as of 2010) is generated, but due to the aging of the rural population and the unprofitability of recycling, it is not collected and left in farmland, which reduces agricultural productivity and pollutes the soil, becoming the main culprit of the rural environment. there is.

In particular, waste vinyl used for houses is economically feasible and is partially recycled by recycling companies. However, there are very few companies that recycle waste vinyl used for mulching due to excessive mixing of foreign substances.

Republic of Korea Patent No. 10-2014-0055756

The purpose of the present invention to solve the above-described problems is to provide a method and device for manufacturing multi-purpose plastic bags using recycled materials to respond to increasingly increasing environmental regulations, prevent environmental pollution, and pursue economic efficiency.

The present invention includes the steps of collecting waste vinyl; Transferring the collected waste vinyl to the primary conveyor; Shredding the transported waste vinyl; Transferring shredded waste vinyl to a secondary conveyor; A first drying step to remove foreign substances and remove moisture from the shredded waste vinyl; Secondary drying step of drying with a heater blower; Melting the secondary dried waste vinyl; And it is characterized by comprising the step of extrusion molding the molten waste vinyl.

In addition, the extrusion molding step according to the present invention is characterized in that a vinyl manufacturing apparatus is provided.

According to the present invention, in order to recycle waste vinyl, etc., it is processed into recyclable raw materials through processes such as collection, shredding, foreign matter removal, moisture removal, and classification to respond to increasingly increasing environmental regulations, prevent environmental pollution, and improve economic efficiency. This has the effect of providing a multi-purpose vinyl manufacturing method and device using recycled materials to pursue this.

1 is a diagram illustrating a vinyl manufacturing apparatus according to an embodiment of the present invention.
Figure 2 is a diagram illustrating an extrusion mold provided in a vinyl manufacturing apparatus according to an embodiment of the present invention.
Figures 3 and 4 are views showing a printing device and a folding portion applied to a vinyl manufacturing device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

First, the waste vinyl applied in the present invention is polyethylene (PE), polyvinyl chloride (PVC), ethylene vinyl acetate copolymer (EVA), linear low density polyethylene (LLDPE), and high density polyethylene (HDPE), which are applied as covering materials for greenhouses. etc. may be applied, but is not limited to this and general vinyl products and vinyl for greenhouses may be applied.

The term recycled raw material resin used in this specification refers to a recycled resin containing the above resins alone or in a mixture of two or more.

The present invention includes the steps of collecting waste vinyl that becomes a recycled raw material resin provided as above; Transferring the collected waste vinyl to the primary conveyor; Shredding the transported waste vinyl; Transferring shredded waste vinyl to a secondary conveyor; A first drying step to remove foreign substances and moisture from the shredded waste vinyl; Secondary drying step of drying with a heater blower; Melting the secondary dried waste vinyl; and extrusion molding the melted waste vinyl to produce the plastic bag according to the present invention.

Waste vinyl applied to the present invention can be collected as a single material or mixed, and when collected as a single material, it is selected and collected by each resin type.

In order to recycle waste vinyl, foreign substances in the waste vinyl must be separated and the moisture must be reduced below a certain level to reduce the dispersion of the material's strength and physical properties and increase the reliability of the material.

Therefore, in order to manufacture plastic bags by recycling waste vinyl, it is important to ensure the reliability of the raw materials, so a separation device to remove foreign substances in the waste vinyl, a drying device to remove moisture, and a transport to put the raw materials into the melter. Devices, etc. are required.

After sorting, the waste vinyl is sent to a shredder through a conveyor and pulverized into small sizes. The pulverized materials are classified by material using the difference in specific gravity using blower equipment.

As the sorted materials pass through equipment such as a trummel, foreign substances are filtered out once more, and moisture is removed as they are dried with frictional heat.

Afterwards, it is transferred to a melter and goes through a melting process to be molded into an intermediate material or pellet material.

In particular, melted waste vinyl is extruded through the plastic bag manufacturing apparatus according to the present invention. In addition, moisture can be finally removed by installing a hopper dryer that performs drying again before extrusion molding.

Figure 1 is a diagram illustrating a plastic bag manufacturing apparatus according to an embodiment of the present invention, Figure 2 is a diagram illustrating an extrusion mold provided in the plastic bag manufacturing apparatus according to an embodiment of the present invention, Figures 3 and Figure 4 is a diagram showing a printing device and a folding portion applied to a vinyl manufacturing device according to an embodiment of the present invention.

1 and 2, the plastic bag manufacturing apparatus according to an embodiment of the present invention includes a first raw material supply unit 110, a first melting unit 120, a second raw material supply unit 130, and a second melting unit. It may include (140), an extrusion mold unit 150, a blow molding unit 160, a blowing unit 170, a transfer unit 180, etc.

The first raw material supply unit 110 may be provided with recycled raw materials such as polyethylene, polyvinyl chloride, and ethylene vinyl acetate copolymer, either alone or in a mixed state.

In addition, as another example, recycled raw materials consisting of high-density polyethylene raw materials and linear low-density polyethylene may be provided alone or in a mixed state.

As another example, 60% of the recycled raw materials, which are polyethylene, polyvinyl chloride, and ethylene vinyl acetate copolymer, are used alone or in a mixed state, and recycled raw materials consisting of high-density polyethylene raw material and linear low-density polyethylene are used alone or in a mixed state. A ratio of 40% or recycled raw materials such as polyethylene, polyvinyl chloride, and ethylene vinyl acetate copolymer alone or mixed, and 40% recycled raw materials consisting of high-density polyethylene raw materials and linear low-density polyethylene alone or mixed. It can be provided at a rate of 50%.

Recycled raw materials having various embodiments as described above are supplied to the first melting unit 120.

The first melting unit 120 melts recycled raw materials, and when any one of the recycled raw materials selected from the first raw material supply unit 110 is supplied, it can be melted and then supplied as resin.

Here, the melting point of the high-density polyethylene raw material with a relatively high melting point has a temperature range of approximately 120-180 ℃, so the temperature range is maintained at approximately 180-190 ℃, and the melting point of the linear low-density polyethylene raw material is It has a temperature range of approximately 110-150 ℃, so it maintains a temperature range of approximately 150-165 ℃, and the melting point of recycled raw materials has a temperature range of approximately 120-180 ℃, so it maintains a temperature range of approximately 180-190 ℃. It can be maintained.

The second raw material supply unit 130 also supplies the above-described recycled raw material to the second melting unit 140.

The extrusion mold unit 150 serves to extrude recycled raw materials and manufactures the final molded plastic bag.

The plastic bag applied to the present invention produces a double plastic bag having an inner and outer surface using the above-described recycled raw materials through the first raw material supply unit 110 and the second raw material supply unit 130.

In addition, the present invention can mold the inner and outer surfaces of the plastic bag from other materials. Preferably, any one of high-density polyethylene, linear low-density polyethylene resin, or a mixed resin among recycled raw materials can be applied to the inner surface so that the bag can be opened smoothly when used, and the outer surface can be made of recycled raw materials such as polyethylene, polyvinyl chloride, and ethylene vinyl acetate copolymer. It can be applied.

The extrusion mold unit 150 includes an extrusion groove 151, a blow die 152, a mold body 153, a first air hole 154, an outlet 155, a first flow path 156, and a second flow path 157. ), etc.

Here, the internal temperature of the extrusion mold unit 150 can be maintained in a temperature range of approximately 120-150°C.

The mold body 153 is provided with a blow die 152 to have an extrusion groove 151 at the top, and a first air hole 154 is formed on the side of the blow die 152 and is an extrusion groove on the outer peripheral surface of the mold body 153. It can be formed through up to (151).

The air supplied from the blower 170, which will be described later, is discharged into the interior of the extrusion groove 151 through the first air hole 154, cooling the film resin discharged through the discharge port 155, which will be described later, to a film state. It is transported along the outer peripheral surface of the mandrel axis 161.

The discharge port 155 is formed in a circular shape at the top of the mold body 153 and discharges the recycled raw material in a resin state.

The first flow path 156 extends from the lower center of the mold body 153 to the upper part and is divided at the first position and connected to the discharge port 155 to form the inner surface of the plastic bag. Recycled raw materials are supplied to the discharge port 155. It can be discharged into the extrusion groove 151 through.

The second flow path 157 extends through and inward from the lower side of the mold body 153, is divided around the first flow path 156 and extends upward, and is formed at the discharge port 155 to form the outer surface of the plastic bag. It is connected to the first flow path 156 at a second position spaced at a certain distance below, and recycled raw materials are discharged into the extrusion groove 151 through the discharge port 155.

The blow molding unit 160 blow molds the film resin discharged from the extrusion mold unit 150 using the mandrel shaft 161, and has a stepped mandrel shaft 161 so that the upper part has a wider diameter than the lower part. When the recycled raw material is hardened and guided along the outer circumferential surface, a cylindrical plastic bag is blow molded by the air discharged through the second air hole 162 formed through the central part of the mandrel shaft 161.

The blower 170 supplies air to the extrusion mold unit 150 and the blow molding unit 160, and uses the blower 171, the first air guide pipe 172, the second air guide pipe 173, etc. Including, air can be supplied to the first air hole 154 of the extrusion mold unit 150 and the second air hole 162 of the blow molding unit 160.

The transfer unit 180 transfers the molded plastic bag through the blow molding unit 160 using a plurality of transport rollers. When the cylindrical plastic bag is formed, a plurality of rollers are positioned and arranged at the rear end to reach the desired position. It can be transported up to.

Meanwhile, various devices may be installed between the blow molding unit 16 and the transfer unit 180 applied to the present invention. As an example, as shown in FIGS. 3 and 4, a printing facility 181 can be installed to print at the same time as the plastic bag is manufactured. In particular, a plastic bag can be folded in half on the transfer unit 180. A folded portion 182 can be installed.

As shown in FIG. 4, the folded portion 182 folds the transported plastic bag at the edge as it is transported from a wide width to a narrow edge, that is, from upward to downward.

In the above description, various embodiments of the present invention have been presented and explained, but the present invention is not necessarily limited thereto, and those skilled in the art will understand various embodiments without departing from the technical spirit of the present invention. It will be easy to see that branch substitutions, transformations, and changes are possible.

110: first raw material supply section 120: first melting section
130: second raw material supply section 140: second melting section
150: extrusion mold part 160: blow molding part
170: blowing unit 180: transfer unit

Claims (2)

Collecting waste vinyl; Transferring the collected waste vinyl to the primary conveyor; Shredding the transported waste vinyl; Transferring shredded waste vinyl to a secondary conveyor; A first drying step to remove foreign substances and remove moisture from the shredded waste vinyl; Secondary drying step of drying with a heater blower; Melting the secondary dried waste vinyl; and extrusion molding the molten waste vinyl; And a multi-purpose vinyl manufacturing method using recycled materials, comprising the step of folding the molded vinyl in half.
According to paragraph 1,
A multi-purpose vinyl manufacturing device using recycled materials, characterized in that an apparatus for manufacturing a multi-purpose bag manufacturing method using the recycled materials is provided.