KR102384729B1 - 3D printer filament manufacturing method using food residues and 3D printer filament manufactured thereby - Google Patents

Abstract

The present invention relates to a 3D printer filament manufacturing method using food residues and a 3D printer filament manufactured thereby, and more particularly, relates to a 3D printer filament manufacturing method using food residues and a 3D printer filament manufactured thereby, which has very excellent fragrance diffusing and lasting properties by using food residues such as oriental herbal medicine residues and fruit peel residues. The present invention exhibits the following effects. That is, according to the present invention, there is an advantage that a 3D printer filament which is harmless to the human body and has very excellent fragrance diffusing and lasting properties can be manufactured.

Description

3D printer filament manufacturing method using food residues and 3D printer filament manufactured thereby}

The present invention relates to a method for manufacturing a filament for a 3D printer using food residues, and a filament for a 3D printer manufactured by the method, and more particularly, to use food residues such as oriental medicine residues and fruit peel residues to produce a fragrance And it relates to a method for manufacturing a filament for a 3D printer excellent in durability, and to a filament for a 3D printer manufactured thereby.

The amount of plastic waste is increasing exponentially with the increase in the usage of various plastic products. In general, plastic waste is disposed of by landfilling, incineration or recycling.

In the case of landfill, as it takes a very long time to decompose landfilled plastic waste, it causes a shortage of landfill space and causes soil pollution. In the case of recycling, there are many difficulties in collection and separation, as well as an increase in treatment cost.

Therefore, in recent years, in order to overcome this problem, eco-friendly bioplastic products with fast degradability have been developed.

Bioplastic refers to a plastic containing more than 25% by weight of so-called biomass derived from plants such as corn and rice husk. By using plant resources in which carbon in the atmosphere is fixed by photosynthesis as a raw material, the concentration of carbon dioxide in the atmosphere increases. It has an inhibitory effect, can reduce the consumption of petroleum, which is a limited resource, and is recently attracting attention because it is decomposed by microorganisms after disposal.

Among them, plant biomass, which belongs to non-edible organic waste resources such as agricultural waste, industrial waste, and food factory by-products, which are difficult to use for human consumption, is attracting attention as an eco-friendly, carbon-neutral biomass material.

In particular, food residues such as oriental medicine residues or fruit peel residues are mostly thrown away, and since most of the food residues are discarded as they are, it is not only a waste of resources but also a huge cost for its treatment.

When the filament is manufactured by the method for manufacturing a filament for a 3D printer using food residues according to the present invention, not only can the waste of resources be reduced, but the manufactured filament for a 3D printer has the advantage of having excellent fragrance and durability. there is.

Republic of Korea Patent Publication No. 10-1550364 (2015.08.31.)

The present invention is to provide a method for manufacturing a filament for a 3D printer excellent in fragrance permeability and durability using food residues such as oriental medicine residues and fruit peel residues, and to provide a filament for a 3D printer manufactured thereby. there is.

In order to achieve the above object, in the present invention, a water removal step of drying the food residues at a predetermined temperature to remove moisture from the food residues (S100); an oil removal step (S200) of drying the food residues that have undergone the step S100 at a predetermined temperature to remove oil from the food residues; a grinding step (S300) of pulverizing the food residues that have undergone the step S200 to a predetermined size; A compound manufacturing step (S400) of mixing the pulverized food residues with plastic raw materials and additives, and extruding at a predetermined temperature to prepare a compound; Mixing the cut pellets with plastic raw materials and additives, and extruding at a predetermined temperature to produce a filament (S600); Filament manufacturing method for a 3D printer using food residues, comprising: Presents a filament for a 3D printer manufactured by

According to the present invention, there is an advantage in that it is possible to manufacture a filament for a 3D printer that is harmless to the human body and has excellent fragrance and longevity.

1 is a flowchart of a filament manufacturing method for a 3D printer using food residues according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described. However, the scope of the present invention should be understood by the description of the claims. Also, descriptions of known technologies that obscure the gist of the present invention will be omitted.

The present invention relates to a method for manufacturing a filament for a 3D printer using food residues, and a filament for a 3D printer manufactured by the method, and more particularly, to use food residues such as oriental medicine residues and fruit peel residues to produce a fragrance And it relates to a method for manufacturing a filament for a 3D printer excellent in durability, and to a filament for a 3D printer manufactured thereby.

A 3D (3-Dimension) printer is an equipment that produces three-dimensional objects by sequentially spraying ink of a special material and stacking them up layer by layer with a fine thickness. 3D printing is being used in various fields.

In addition to the automobile field composed of many parts, it is used by many manufacturers for the purpose of making various models such as medical manikins and household products such as toothbrushes and razors.

Currently, it is a material widely used in 3D printing, and it is a solid thermoplastic plastic that is free to melt and harden, and it occupies 40% of the market. The form of such a thermoplastic material may have a filament, particle or powder form. Among them, the filament type 3D printing is faster than other types in terms of speed, and thus the productivity is high and the diffusion rate is fast.

Existing filament materials for 3D printers include polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), high density polyethylene (HDPE), polycarbonate (PC), Nylon, Nylon, Urethane, PEI, etc. , but the reason is as follows.

First, the melting point is moderately high, and the solidification rate after printing is fast, so even if the printing speed is fast, there is no deformation and the dimensional and shape stability is good.

Second, the melting point is moderately low, and the extrusion is easy and the production efficiency is high when manufacturing the filament. Moreover, if the melting point is too high, it consumes a lot of power to melt the filament, and it becomes an unnecessary cost increase factor such as the parts in the printer must be made of materials that can withstand high heat.

However, PLA makes the printer sticky when melted, which makes it difficult to work, is an eco-friendly material that decomposes naturally or is difficult to recycle, and requires careful storage of the material because it is brittle and has high moisture absorption. In addition, ABS has a bad odor when melting, so there is a problem in that additional work such as ventilation after printing or leaving it for a long time to remove the odor is problematic.

As shown in FIG. 1, the method for manufacturing a filament for a 3D printer using food residues according to the present invention includes a water removal step (S100), an oil removal step (S200), a grinding step (S300), and a compound manufacturing step (S400), and the pellet manufacturing step (S500), and may be configured to include a filament manufacturing step (S600).

Here, food residues refer to residues thrown away after ingestion of food. In the present invention, herbal medicine residues and fruit peel residues are provided as two examples of food residues.

Here, the herbal remnants refer to at least any one or more medicinal substances selected from ginseng, baekchul, baekbokryeong, licorice, Sukjihwang, oyster yam, cheongung, angelica, hwanggi, broiler, and antler.

Food residues such as oriental medicine residues or fruit peel residues are mostly thrown away, and since most food residues are discarded as they are, it is not only a waste of resources but also a huge cost for disposal.

When a filament for a 3D printer is manufactured by the method for manufacturing a filament for a 3D printer using food residues according to the present invention, it is possible to reduce the waste of resources, and the manufactured filament for a 3D printer has excellent fragrance and durability has an advantage.

The moisture removal step (S100) will be described. The water removal step ( S100 ) is a step of first drying the food residues at a predetermined temperature to remove moisture from the food residues. The drying may be performed using a known hot air machine, and may be performed through various known methods such as vacuum drying, hot air drying, and airflow drying.

The purpose of the water removal step (S100) is to sufficiently remove the moisture from the food residues in a range in which the properties of the food residues do not change by making the water removal step (S100) be performed at an appropriate temperature for a long time.

In the case of using the herbal medicine residues as food residues, it is preferable to dry the herbal medicine residues at a temperature of 50 to 90° C. for 10 to 15 hours, but is not necessarily limited thereto.

When the fruit peel residue is used as a food residue, it is preferable to dry the fruit peel residue at a temperature of 50 to 90° C. for 24 to 36 hours, but is not necessarily limited thereto.

The oil removal step (S200) will be described. The oil removal step (S200) is a step of removing the oil content (vegetable oil) of the food residues by drying the food residues that have undergone the step S100 at a predetermined temperature.

The oil removal step (S200) is a necessary step because the commercial properties of the filament for a 3D printer must be removed as well as the moisture from the food residue.

The drying may be performed using a known hot air machine, and may be performed through various known methods such as vacuum drying, hot air drying, and airflow drying.

The drying temperature in the oil removal step (S200) must be higher than the drying temperature in the water removal step (S100) to sufficiently remove the oil, which is due to the specificity of the material such as herbal medicines or fruit peel residues.

On the other hand, the oil removal step (S200), as described above, although the main purpose is to remove the oil content of the food residue, it is of course that the remaining moisture cannot be removed in the water removal step (S100) can also be removed.

If only the oil removal step (S200) is performed without the water removal step (S100), the drying time cannot but be increased, and in this case, a problem occurs in which the food residues are burned.

Therefore, it is important to first go through the water removal step (S100) to sufficiently remove the moisture from the food residue, and then go through the second oil removal step (S200) to remove the oil from the food residue at a high temperature in the shortest possible time. .

In the case of using herbal medicine residues as food residues, it is preferable to dry the first dried herbal medicine residues at a temperature of 120 to 150° C. for 4 to 8 hours, but is not necessarily limited thereto.

If the drying is made at a temperature of less than 120 ℃, there is a problem in productivity due to the slow drying rate, when the drying is made at a temperature exceeding 150 ℃, there is a problem that the properties of the herbal medicine residue is changed.

When the fruit peel residue is used as a food residue, it is preferable to dry the first dried fruit peel residue at a temperature of 100 to 120° C. for 2 to 6 hours, but is not necessarily limited thereto.

When drying is performed at a temperature of less than 100°C, there is a problem in productivity due to a slow drying rate, and when drying is performed at a temperature exceeding 120°C, there is a problem in that the properties of the fruit peel residue are changed.

The grinding step (S300) will be described. The grinding step (S300) is a step of pulverizing the food residues that have undergone the step S200 to a predetermined size, and is a step made to increase the fragrance of the food residues. The pulverization may be selected from dry pulverization or water pulverization in consideration of pulverization efficiency, and may be performed using various known methods such as ball milling or pin milling.

When the herbal medicine residue is used as a food residue, it is characterized in that the secondary dried herbal medicine residue is pulverized to a size of 25 to 50 μm. When it is larger than 50 μm, there is a problem in that the extruder is clogged during filament manufacturing or is not manufactured to a constant thickness.

When the fruit peel residue is used as a food residue, the secondary dried fruit peel residue is pulverized to a size of 25 to 50 μm. When it is larger than 50 μm, there is a problem in that the extruder is clogged during filament manufacturing or is not manufactured to a constant thickness.

The compound manufacturing step (S400) will be described. The compound manufacturing step (S400) is a step of mixing the pulverized food residues with plastic raw materials and additives, and extruding them at a predetermined temperature to prepare a compound.

The plastic raw material is PLA (polylactic acid), ABS (acrylonitrile butadiene styrene), HDPE (high density polyethylene), polycarbonate (polycarbonate, PC), Nylon, Nylon, Urethane, PEI, such as 3D printer filament material is selected from many materials used as filament materials. can

Among them, PLA mentioned in Examples of the present invention is an eco-friendly resin made from raw materials extracted from corn starch, and has the advantage of being harmless to the human body and the environment. Also, it causes clogging of the extruder in the extrusion process for filament production.

Therefore, in order to manufacture a large amount of high-quality filament for 3D printers, the plastic raw material and the pulverized mixed particles should be well mixed, and additives should be additionally added to make bioplastic pellets in which the filament can be stably manufactured.

The additive is preferably at least one selected from the group consisting of an amide-based lubricant compound, copolyamide, Ethyl Methane Sulfonate (EMS), Ethylene Bis Stearamide (EBS), and D-Sorbitol.

As an amide-based lubricant compound, Struktol's TR016 is an example, which is a fatty acid metal soap and an amide, which plays a decisive role in binding PLA and biomass.

Since the amide component contained in the amide-based lubricant compound is capable of hydrogen bonding, it can serve as a physical binder between the polymer and the filler acid. For this reason, by adding an amide-based lubricant compound, it acts as a very efficient mixing/dispersing agent to make a more homogeneous compound.

It is preferable to add 0.1 to 5% by weight based on TR016, but the range may be adjusted according to the components of the compound, the concentration and the amount of other additives added.

As the copolyamide, Griltex's D1549A may be exemplified, which is a heat stabilized copolyamide, and 0.1 to 5 wt% is preferably added based on this. However, the range may be adjusted according to the composition of the compound, the concentration and the amount of other additives added.

EMS (Ethyl Methane Sulfonate) is 0.1 to 5% by weight, EBS (Ethylene Bis Stearamide) is 0.1 to 5% by weight, D sorbitol (DSorbitol) is preferably added 1 to 10% by weight, but the range is also a component of the compound , the concentration and the amount of other additives to be added.

In the step S400, the mixing ratio is preferably 5 to 15 parts by weight of the pulverized food residues and 3 to 15 parts by weight of the additive relative to 100 parts by weight of the plastic raw material, but is not necessarily limited thereto.

In the case of using herbal medicine residues as food residues, it is preferable to manufacture a compound by extruding at a temperature of 200 to 220° C., but is not necessarily limited thereto. However, in the case of extruding at a temperature exceeding 220 ℃, since the problem of burning off the oriental medicine residue occurs, at least the extrusion temperature should not exceed 220 ℃.

When the fruit peel residue is used as a food residue, it is preferable to manufacture a compound by extruding at a temperature of 200 to 220° C., but is not necessarily limited thereto. However, when extruding at a temperature exceeding 220 ℃, since the problem of burning the fruit peel residue occurs, at least the extrusion temperature should not exceed 220 ℃.

The extrusion may be performed through a variety of known methods using a single screw, twin screw or kneader extruder to prepare a compound.

The pellet manufacturing step (S500) will be described. The pellet manufacturing step (S500) is a step for producing pellets by cutting the compound to a predetermined size. Here, the size of the pellets is preferably 1 to 5 mm, but is not necessarily limited thereto.

The filament manufacturing step (S600) will be described. The filament manufacturing step (S600) is a step of manufacturing a filament for a 3D printer by mixing the cut pellets with a plastic raw material and additives, and extruding them at a predetermined temperature.

The mixing ratio in step S600 is preferably 25 to 50 parts by weight of the cut pellets and 3 to 15 parts by weight of the additive relative to 100 parts by weight of the plastic raw material, but is not necessarily limited thereto.

In the case of using the herbal medicine residue as a food residue, it is preferable to manufacture a filament by extrusion at a temperature of 200 to 220 ℃, but is not necessarily limited thereto.

When using the fruit peel residue as a food residue, it is preferable to manufacture a filament by extrusion at a temperature of 200 to 220 ℃, but is not necessarily limited thereto.

The present invention described above is not limited by the above-described embodiments, and various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention. Those of ordinary skill in the art to which the present invention pertains It will be clear to

Claims (5)

a water removal step of drying the food residues at a temperature of 50 to 90° C. for 10 to 15 hours to remove moisture from the food residues (S100);
An oil removal step (S200) of drying the food residues that have undergone the step S100 at a temperature of 120 to 150° C., which is higher than the drying temperature in the step S100, for 4 to 8 hours to remove the oil content of the food residues;
a grinding step (S300) of pulverizing the food residues that have undergone the step S200 to a size of 25 to 50 μm;
A compound manufacturing step (S400) of mixing the pulverized food residues with plastic raw materials and additives, and extruding them at a temperature of 200 to 220°C;
A pellet manufacturing step of cutting the compound to prepare pellets (S500);
A filament manufacturing step (S600) of mixing the cut pellets with plastic raw materials and additives, and extruding at a temperature of 200 to 220° C. to produce a filament for a 3D printer;

In the step S100,
It is characterized in that at least any one or more oriental medicine residues selected from ginseng, baekchul, baekbokryeong, licorice, sukjihwang, ear lily, cheongung, angelica, hwanggi, broiler, and antler are used as food residues,

In the step S400, the plastic raw material is
PLA (polylactic acid), ABS (acrylonitrile butadiene styrene), HDPE (high density polyethylene), polycarbonate (PC), Nylon, Nylon, Urethane, characterized in that at least one selected from the group consisting of PEI,

In the step S400, the additive is
Amide-based lubricant compound, copolyamide (Copolyamide), EMS (Ethyl Methane Sulfonate), EBS (Ethylene Bis Stearamide), characterized in that at least one selected from the group consisting of D-Sorbitol (D-Sorbitol),

In the step S400, the mixing ratio
5 to 15 parts by weight of pulverized food residues and 3 to 15 parts by weight of additives relative to 100 parts by weight of the plastic raw material,

The mixing ratio in step S600
Based on 100 parts by weight of the plastic raw material, 25 to 50 parts by weight of the cut pellets, and 3 to 15 parts by weight of additives
A method for manufacturing filaments for 3D printers using food residues.
a water removal step of drying the food residues at a temperature of 50 to 90° C. for 24 to 36 hours to remove moisture from the food residues (S100);
An oil removal step (S200) of drying the food residues that have undergone the step S100 at a temperature of 100 to 120° C., which is higher than the drying temperature in the step S100, for 2 to 6 hours to remove the oil content of the food residues;
a grinding step (S300) of pulverizing the food residues that have undergone the step S200 to a size of 25 to 50 μm;
A compound manufacturing step (S400) of mixing the pulverized food residues with plastic raw materials and additives, and extruding them at a temperature of 200 to 220°C;
A pellet manufacturing step of cutting the compound to prepare pellets (S500);
A filament manufacturing step (S600) of mixing the cut pellets with plastic raw materials and additives, and extruding at a temperature of 200 to 220° C. to produce a filament for a 3D printer;

In the step S100,
Characterized in that the fruit peel residue is used as a food residue,

In the step S400, the plastic raw material is
PLA (polylactic acid), ABS (acrylonitrile butadiene styrene), HDPE (high density polyethylene), polycarbonate (PC), Nylon, Nylon, Urethane, characterized in that at least one selected from the group consisting of PEI,

In the step S400, the additive is
Amide-based lubricant compound, copolyamide (Copolyamide), EMS (Ethyl Methane Sulfonate), EBS (Ethylene Bis Stearamide), characterized in that at least one selected from the group consisting of D-Sorbitol (D-Sorbitol),

In the step S400, the mixing ratio
5 to 15 parts by weight of pulverized food residues and 3 to 15 parts by weight of additives relative to 100 parts by weight of the plastic raw material,

The mixing ratio in step S600
Based on 100 parts by weight of the plastic raw material, 25 to 50 parts by weight of the cut pellets, and 3 to 15 parts by weight of additives
A method for manufacturing filaments for 3D printers using food residues.
The method of any one of claims 1 to 2 prepared
Filament for 3D printers using food residues. delete delete

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