KR101038419B1 - Product method of synthetic resin chip in reproduction - Google Patents

Abstract

PURPOSE: A method is provided to manufacture recycled synthetic resin product with high solidity and durability, to produce the synthetic resin of high quality due to the improvement of more detection effectiveness of the ash component. CONSTITUTION: The method includes steps of supplying the synthetic resin article for regeneration to the pulverizing device excluding basically selected synthetic resin article of blue gray and white color in which the ash component is contained, of cutting the synthetic resin article for the regeneration which excluded the synthetic resin article of the blue gray and the white color, of drying and washing the cut synthetic resin, of fusing the synthetic resin and filtering the ash component through screen, and of cutting the fused synthetic resin pulled out of in the fixed strand of diameter and manufacturing in the form of chip for the regeneration.

Description

Manufacturing method for producing synthetic resin recycled material with reduced ash content by screening synthetic resin containing ash {product method of synthetic resin chip in reproduction}

The present invention relates to a method for producing synthetic resin recycled raw materials having reduced ash content by selectively removing ash chips containing ash for recycling and re-producing the various synthetic resin products already produced and used. Particularly, when the ash component added to the first-generated synthetic resin product or article forms a new color, or it causes difficulty in preparing the density and shape of the chip, the synthetic resin containing ash can be effectively removed and recycled. The present invention relates to a method for producing synthetic resin recycled raw materials having reduced ash content by screening chips.

In general, synthetic resins are used in various forms. Various products are packaged using synthetic resins, and they also form a body and housing of plastic bottles and products. By the way, the products formed of these synthetic resins give a unique color by adding a special color when melting the synthetic resin.

Looking at the basic colors, there are colorless synthetic resins, which are divided into white (white), blue gray, and other colors. These are all included in the pigment when it comes to color. In some cases, colors are added to mix with the resin more effectively.

For example, in the case of colorless, the amount of ash injected is about 0.1% of the total weight. In the case of white, the amount of ash injected is 1.5%, and in the case of blue gray, it is 1.5%. For other colors, the color does not appear until about 0.2% ash is added. This ash, which must be added for the color of the synthetic resin product or article, does not have a beneficial effect for regeneration. That is, the higher the ash content, the more difficult it is to melt and chip. When manufactured in the form of a thin chip, there is a high possibility that the portion containing ash is broken, and it is difficult to color after regeneration.

In addition, these problems are not compatible with KS regulations these days. In order to produce more effective resin sewer pipes or other products, this standard must be met, which is difficult if all of the above amounts of ash are included in the regeneration of the resin. This is because the KS standard specifies the ash content in the case of recycled chips at a mass ratio of 0.1%.

As a result, the recovery and removal of the amount of ash injected during the regeneration of the synthetic resin product has become a necessary matter, and no effective solution for this has been given except in the present invention.

The present invention is to provide a method for producing a synthetic resin recycled raw material of reduced ash content by screening and removing the synthetic resin chip containing ash for recycling and re-producing the various synthetic resin products already produced and used.

Particularly, when the ash component added to the first-generated synthetic resin product or article forms a new color, or it causes difficulty in preparing the density and shape of the chip, the synthetic resin containing ash can be effectively removed and recycled. The present invention provides a method for producing a synthetic resin recycled material having reduced ash content by screening chips.

A method for producing synthetic resin recycled raw material having reduced ash content by screening and removing the synthetic resin chip containing ash according to the present invention comprises: a first step; Supplying the synthetic resin article for regeneration to a grinder, except for supplying the synthetic resin article of white and blue gray colors containing ash components by basic selection (A10); Second step; A grinding step (A20) of cutting the synthetic resin article for regeneration, in which the synthetic resin articles of white and blue gray color are excluded, to finely crush it; The third step; Washing (A30) and drying (A40) the synthetic resin for the cut regeneration; The fourth step; Melting the synthetic resin for dry regeneration (A60) and hanging ash components through the screen; The fifth step; It comprises a step (A70) is produced by cutting the molten synthetic resin into strands of a constant diameter to form a chip for regeneration.

In addition, according to the manufacturing method of producing a synthetic resin recycled raw material with reduced ash content by screening and removing the synthetic resin chip containing ash of the present invention, the basic selection of the first step, through the manual selection or through the image sensing camera Remove the white and blue gray synthetic resin items containing ash components: After the third drying step, the white and blue gray colored synthetic resin pieces cut using a color separator 90 are used. Selecting and removing the 88: The color discriminator 90, the conveyor belt 93 to move the recycled synthetic resin of the crushed pieces and drop through the gravity at the end; A sensing camera 91 installed at the bottom of the conveyor belt 93 to photograph and sense pieces of regenerated synthetic resin falling; Among the pieces of synthetic resin to be sensed, an air gun 92 for ejecting high-pressure air toward only the synthetic resin pieces 88 of white and blue gray colors containing ash components; and comprising the synthetic resin pieces of white and blue gray colors ( 88) are screened and excluded.

In addition, the color separator according to the manufacturing method of the present invention to produce a synthetic resin recycled raw material with reduced ash content by screening and removing the synthetic resin containing ash, conveying the recycled synthetic resin of the crushed pieces dropping through the gravity at the end (93); An optical sensor that emits far-infrared rays toward the falling piece of regenerated synthetic resin installed at the bottom of the conveyor belt 93 and senses only a piece of synthetic resin of white and blue gray colors through the wavelengths of the regression; Among the pieces of synthetic resin to be sensed, an air gun 92 for ejecting high-pressure air toward only the synthetic resin pieces 88 of white and blue gray colors containing ash components; and comprising the synthetic resin pieces of white and blue gray colors ( Only 88) are screened and excluded.

According to the present invention, there is an advantage that can produce a more durable and durable recycled synthetic resin product when the synthetic resin product is recycled.

In addition, according to the present invention, it is possible to achieve the detection of higher ash components by placing two or three stages of ash component classification and screening, thereby producing a high quality synthetic resin regenerated product.

In addition, according to the present invention, there is an advantage that it is possible to achieve a higher ash content detection effect by applying the conventional production method of the recycled chip of the synthetic resin product.

1 is a view showing a method for producing a recycled synthetic resin chip according to the present invention,
2 is a block diagram showing the process sequence of the operation according to the present invention;
3 is a view showing a state of the color sorter according to the present invention.

The present invention is a method of manufacturing a recycled chip for producing recycled synthetic resin products or articles. Therefore, the present invention will be described in detail with reference to FIGS.

First, a method of regenerating a conventional synthetic resin product of the most general form will be described with reference to FIG. 1. This method shows a great difference in terms of the prior art and the technique and the effect of the present invention, but there is no difference in the steps of the constitutive process.

As shown, synthetic resins are manufactured and used in various forms. The plastic bottle 81 shown in FIG. 1, various housings, external appearance and internal parts of the product, and synthetic resin are used as the whole of the article. Such a synthetic resin is once produced and then produced as another article through a process of regeneration. At this time, the chip is cut and cut into pieces A82 to be chipped as shown in FIG. 1. Cutting is for melting and cutting with a cutter to a suitable size according to the size of the furnace. Of course, the melt 83 of the cut synthetic resin product is liquefied to a high temperature and manufactured in the form of a small diameter bar 84 of FIG. In addition, the bar 84 is cut in the form of the chip 85 shown on the right to be a raw material for manufacturing the next synthetic resin product. Conventionally, this invention, and the method of such manufacture are the same.

By the way, as described in the prior art, in the case of the synthetic resin product is a certain color by adding a pigment. This color is not helpful for playback. In particular, white synthetic resin products or blue gray synthetic resin products require about 1.5% of ash to be added to produce the color. This ash component weakens the density of the synthetic resin, and is likely to cause some cracking when extruded thinly as shown in bar 84 of FIG. 1. The ash component is mineral, like lime, mineral. Therefore, it cannot be firmly combined with each other. As a result, even if some ash is contained in the bar 84, the phenomenon is that they can not be combined with each other and are broken. Therefore, in order to produce a higher quality recycled resin chip 85, it is necessary to exclude the components of the ash.

In the prior art, the melt was filtered through a screen to remove some of the ash components, but this was not effective. Frequent breakdown of the screen made it inevitable to replace it. The present invention completely solved this problem.

Looking at the process of the invention as follows.

As shown in Fig. 2 (a), the present invention comprises a first step; There is a step (A10) of supplying the synthetic resin article for regeneration to a grinder, except for the basic selection of the synthetic resin article of the white and blue gray color containing the ash component.

Give an example and explain it with plastic bottle. When the plastic bottle 81 is shredded to produce the regeneration chip 85, the plastic bottle of white color and the plastic bottle of blue gray color are excluded and supplied. In the present invention, the operation of sorting the white and blue gray color from the synthetic resin product thus added is called basic screening.

White and blue gray have a higher amount of ash than other colors. In the case of white and blue gray colors, the ash component is basically 1.0 or 1.5% in proportion to the weight, so it is completely excluded. These bottles, which are completely excluded and supplied, are colorless or other colors other than white and blue gray, so the ash content that can be added in proportion to the weight is only 0.1-0.2%. When the recycled chip is produced without the plastic bottle containing a large amount of ash components, it is easy to meet the KS standard and a higher-quality recycled chip 85 can be produced.

Next, in the present invention, the second step; Cutting the synthetic resin article for regeneration excluding the white and blue gray synthetic resin article is subjected to a grinding step (A20) to give a fine piece A (82). This is a step without any significant difference between the prior art and the present invention, which is to cut and cut the synthetic resin product to facilitate melting. It is cut to a suitable size that is convenient for melting and then introduced into the next step.

Next, in the present invention, the third step; The synthetic resin for cutting regeneration is subjected to a step of washing (A30) and drying (A40). As shown in (a) of FIG. 1, the crushed pieces A 82 are likely to contain various dusts or foreign substances. Ash components flowing in the workplace may also be introduced, and other foreign substances other than dust or resin may be introduced. In order to solve this problem, in the present invention, the cut pieces A 82 are first washed and dried. Drying is to eliminate the disadvantages of moisture on the melting operation in the subsequent operation of the melting. Clean water is removed and the piece A (82) is put into the melter to melt.

Next, the present invention is the fourth step; The synthetic resin for dry regeneration is melted (A60), and the ash component is hung through the screen.

The dried piece of resin A (82) is melted to a high temperature, and the ash component is secondaryly filtered through the screen. The molten synthetic resin is passed through the screen, and the screen is moved in the horizontal direction to filter out the ash content sandwiched between the screen, this method is a known method. In the present invention, the ash component is once again filtered out from the synthetic resin melt 83 dissolved through the screen as in the related art.

Next, the present invention is a fifth step; The molten synthetic resin is cut into strands of a constant diameter and cut to produce a chip 85 for regeneration (A70). That is, the melt, which is melted and the ash component is selected in a large amount, is extruded in the form of a bar 84 and cut to produce the melt in the form of a chip 85. This process is no different from the prior art described above. Only the chip 85 produced in the present invention has a large amount of ash components removed as compared to the conventional structure is dense, high density, high durability.

The present invention described above presents a very basic manufacturing method. The present invention will now be described in further detail in this way through more detailed examples.

In the present invention, the basic selection of the first step can be performed as follows. This can be done by manual screening or by an image sensing camera to remove white and blue-gray synthetics that contain ash components.

Basic screening is not a special method of screening, but the supplier can remove the white and blue-grey synthetic resin products that contain high amounts of ash and manually add other color and colorless products. For example, plastic bottles are selected from only white plastic bottles or blue gray plastic bottles. This is the most important way to screen large quantities of ash components.

Of course, the present invention can automatically select the white and blue gray colors. It installs an image sensing camera that automatically detects and senses white or blue gray color, and detects the discarded synthetic resin products passing through the conveyor belt and removes them by air gun or special means. These are all well known but have not been used in the method of manufacturing a reproducing chip as in the present invention.

In addition, in the present invention, after the drying step of the third step, it is preferable to remove the pieces of synthetic resin 88 of white and blue gray color, which are cut using the color discriminator 90, containing ash components.

The present invention is a method for removing the ash component contained in the synthetic resin product and improving the quality of the chip 85. In the present invention described above, measures for screening the ash component through the screen in the primary screening process and the melting step of the primary component by the primary screening have been devised, but the color discriminator 90 as a method to make this more certain. Was adopted.

Rather than washing piece A 82 of the synthetic resin product and immediately drying it after drying, the piece 88 of white and blue gray color is once again sorted. As an example, plastic bottles are made of only one color, not all of them. In the case of plastic bottles, the bottleneck part is formed in white tone, and the bottle body part is often formed in yellow or other colors. At this time, it is difficult to exclude plastic bottles based on bottlenecks in basic screening. If the bulky bottle body is not white or blue grey, it is likely to be supplied as it is, cut and processed later. This is not limited to plastic bottles, but the same applies to various synthetic resin products. Thus, if pieces 88 or parts and parts having such a white and blue gray color are injected and melted, this can produce a high content of ash content.

As a result, in order to solve the problem, the present invention removes the synthetic resin fragment A 82, which has already undergone basic screening and is carved into the melting stage, through the color separator 90. 1b and 3, the color discriminator 90 is shown in detail.

Then look at a more specific embodiment of such a color discriminator (90).

As shown in FIG. 3, the color discriminator 90 has a conveyor belt 93 that moves the regenerated synthetic resin of the crushed piece A 82 and drops it through its gravity at the end thereof. There is a sensing camera 91 for shooting and sensing a piece of regenerated synthetic resin piece A (82) that is installed at the bottom. Among the synthetic resin pieces A (82) to be sensed, a piece of synthetic resin of white and blue gray color containing ash components (88) There is an air gun 92 which blows out the high pressure air toward only. Therefore, they combine to select and exclude the synthetic resin pieces 88 of white and blue gray color.

As in the drawing of this embodiment, the color discriminator 90 is installed in the conveyor belt 93 where the washed and dried piece of synthetic resin A 82 approaches the melting furnace. The conveyor belt 93 which is automatically moved to pieces is installed at an end thereof toward the top of the melting furnace or towards a separate moving conveyor belt 93. Piece A (82), which was moving in the conveyor belt (93), is dropped through gravity at its end. At this time, the falling piece of synthetic resin (A) 82 is photographed through the sensing camera 91. The sensing camera 91 is programmed to select only white and blue gray colors, and the pieces 88 of white and blue gray colors sensed through the sensing camera 91 are sprayed through the air gun 92. Pneumatically removed to the outside. This method first captures the synthetic resin piece A (82) falling by the sensing camera 91 and operates the air gun 92 through the control unit to shoot a piece of white and blue gray color (88) falling off the high pressure air To discharge. As shown in FIG. 3, white 88 and blue grey flakes 88 are triturated through this color separator 90 and removed from the melt. Because of this, the melt of the present invention can be an excellent regeneration chip 85 that is completely filtered out of ash components.

Of course, unlike the color discriminator 90 described above, the color discriminator 90 may also be mounted in the following manner.

This color discriminator (90) is a second embodiment, which has a conveyor belt (93) which moves the regenerated synthetic resin of the crushed piece (A 88) and drops through its gravity at the end, and that of the conveyor belt (93) There is an optical sensor (not shown) that emits far infrared rays toward the regenerated synthetic resin piece A (82) that is installed at the bottom and senses only the synthetic resin pieces of white and blue gray color through the wavelengths of the regenerated synthetic resin. There is an air gun 92 which blows high pressure air toward only a piece of synthetic resin 88 in white and blue gray colors containing ash components. The combination is to select and exclude only the piece of synthetic resin 88 of the white and blue gray color.

There is no difference from the color discriminator 90 of the first embodiment of FIG. 3 described above, but it is not a method of sensing through the sensing camera 91 but sensing through an optical sensor. Ride the Conveyor Belt (93) and emit far infrared rays toward the falling piece A (82), and hit the piece A (82) to read the wavelength of the far infrared rays coming back to the white color and blue gray Piece 88 will be screened. Of course, the method of firing and removing air through the air gun 92 toward the screened piece is the same as the first embodiment described above.

In the figure of FIG. 3, the ash component having a high content of ash to be screened is shown in the dark colored state, and in the case of the fragment A 82, only the general outline is shown. However, the fragment A 82 is a term referring to all the cut pieces of synthetic resin, and the fragment 88 is a term that specifically refers to a piece having a white color and a blue gray color to be selected among them. In the color discriminator block diagram of FIG. 1, reference numeral A50 denotes a procedure of the process, and 90 in FIG. 3 illustrates a configuration of the color discriminator.

81; Plastic bottle 82; Sculpture A
83; Melt 84; bar
85; Regeneration chip 90; Color separator
91; Sensing camera 92; Air gun
93; Conveyor Belt

Claims (5)

First step; Supplying the synthetic resin article for regeneration to a grinder, except for supplying the synthetic resin article of white and blue gray colors containing ash components by basic selection (A10);
Second step; A grinding step (A20) of cutting the synthetic resin article for regeneration excluding the white and blue gray colored synthetic resin articles to finely crush the pieces A (82);
The third step; Washing (A30) and drying (A40) the synthetic resin for the cut regeneration;
The fourth step; Melting the synthetic resin for dry regeneration (A60) and hanging ash components through the screen;
The fifth step; Removing the molten synthetic resin by cutting the strands of a predetermined diameter to produce a form of a chip for regeneration (A70); and comprises a synthetic resin chip containing ash, characterized in that to produce a recycled synthetic resin to selectively remove Process for producing synthetic resin recycled raw materials with reduced ash content.
The method of claim 1,
Basic selection of the first stage,
Synthetic resin recycled raw materials with reduced ash content by selectively removing ash-containing synthetic resin, characterized by removing white and blue gray colored synthetic resin products containing ash components by sorting by hand or by image sensing camera Manufacturing method to produce.
The method of claim 1,
After the drying step of the third step, the ash-containing synthetic resin, which is selected and removed by using a color separator 90 to remove the pieces of synthetic resin 88 of white and blue gray color containing ash components. Method of producing a synthetic resin recycled raw material with reduced ash content by screening removal.
The method of claim 3,
Color separator 90,
A conveyor belt 93 which moves the regenerated synthetic resin of the crushed pieces and drops them through gravity at their ends;
A sensing camera 91 for photographing and sensing a piece of recycled synthetic resin fragment A 82 installed at a lower end of the conveyor belt 93;
Among the synthetic resin pieces A (82) to be sensed, the air gun 92 for ejecting high-pressure air toward only the synthetic resin pieces 88 of the white and blue gray color containing the ash component; configured to include the white and blue gray color The method of producing a synthetic resin recycled raw material with reduced ash content by screening and removing the synthetic resin containing ash, characterized in that the screening and excluding the synthetic resin pieces (88).
The method of claim 3,
Color sorter,
A conveyor belt 93 which moves the regenerated synthetic resin of the crushed pieces and drops them through gravity at their ends;
An optical sensor that emits far infrared rays toward the regenerated synthetic resin fragment A 82 which is installed at the lower end of the conveyor belt 93 and senses only the synthetic resin fragment 88 of white and blue gray color through the reverted wavelength;
Among the synthetic resin pieces A (82) to be sensed, the air gun 92 for ejecting high-pressure air toward only the synthetic resin pieces 88 of the white and blue gray color containing the ash component; configured to include the white and blue gray color The method of producing a synthetic resin recycled raw material with reduced ash content by screening and removing the synthetic resin containing ash, characterized in that the screening and excluding only the synthetic resin piece (88).

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