KR100921012B1 - Extruding article using waste and preparing thereof - Google Patents

Abstract

The present invention provides a method for producing a molded article using waste, comprising: pulverizing to a powder form of 50 to 100 mesh by mixing in a ratio of 4: 4 to 5: 5 by weight of waste wood and waste plastic; Melting the ground particles at 180 to 220 degrees simultaneously with mixing in a static mixer without storing or aging; Extruding the mixture of the crushed and molten waste wood and waste plastic; Quenching the extruded melt by a chiller; A post-treatment step of removing the internal stress between the rollers having different grip points from the extrudate through the quenching step; And it provides a molded product using the waste comprising the step of forming the post-treated extrudate in a predetermined form and a method for producing the same.

Waste, forming, extrusion

Description

 Molded article using waste and manufacturing method thereof {EXTRUDING ARTICLE USING WASTE AND PREPARING THEREOF}

The present invention relates to a molded article using a waste and a method for manufacturing the same, and more particularly, to a molded article using a waste with improved physical properties as a molded article and a method for producing the same while recycling resources using waste wood and waste plastics.

Interest and research on the recycling of waste in the environmental sector is an ever-expanding part. In particular, the global warming problem is caused by the exponential increase in the use of wood, and research on recycling wood is continued. In addition, in the case of polymer materials, such as vinyl, the decomposition period in nature is reported to be 50 to 100 years, so the demand for treatment as industrial waste has been greatly raised.

From this point of view, each study is under way to recycle wood and to increase the degradability of polymers. There are also plans to reuse them all.

Korean Patent Invention No. 201875 includes waste wood, waste wood, and waste plastics as main components, and no separate binder is needed. Optionally, thermosetting phenol resin is included as a binder component. By molding into a panel, the thermosetting urea-formaldehyde resin, which is mainly used as a binder component, is not used at all, thereby suppressing the emission of hazardous gases and the generation of wastes in the manufacturing process or on the product, and also in terms of strength and water resistance. A composite panel using improved waste resources and its manufacturing method are proposed.

The proposal is positive in terms of recycling the conventionally discarded resources, but there is a problem in that the productivity is low in that the molding is manufactured as a press process, and the surface smoothness is not smooth and the surface is not smooth.

In addition, the Republic of Korea Patent Publication No. 1995-360 waste fibers are shredded into 2-11mm size by mixing the waste vinyl in a weight ratio of 6: 4-5: 5 ratio, and spread to a uniform thickness in the other surface machine 100 at a temperature of 200-300 ℃ A method for producing a building fiber plywood using waste materials which is passed through a presser to apply a pressure of kg / cm 3 -300 kg / cm 3, cooled for 3-10 minutes at a temperature of 10-25 °, and cut into a predetermined size has been proposed. . Although the above method has improved productivity in that it is an extrusion method, no attempt has been made to improve surface properties.

That is, the proposed methods could only be satisfied from the aspect of recycling waste, and there was a problem in that it could not be used as a high-quality material because there was a problem that the surface properties or the physical properties were not improved. Therefore, there is an urgent need for a method that can express the quality of an article made from raw materials while recycling waste.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a molded article and a method of manufacturing the same, which can secure various properties of the molded article manufactured from raw materials by recycling waste.

Another object of the present invention is to provide a molded article having improved surface properties as a recycled article and a manufacturing method thereof.

In order to achieve the above object, the present invention is a method for producing a molded product using waste, the step of pulverizing into a powder form of 50 to 100 by mixing in a ratio of 6: 4 to 5: 5 on the basis of the weight of waste wood and waste plastic ; Melting the ground particles at 180 to 220 degrees simultaneously with mixing in a static mixer without storing or aging; Extruding the mixture of the crushed and molten waste wood and waste plastic; Quenching the extruded melt by a chiller; A post-treatment step of removing the internal stress between the rollers having different grip points from the extrudate through the quenching step; And it provides a method for producing a molding using the waste comprising the step of molding the post-treated extrudate to a final predetermined form.

In another aspect, the present invention provides a method for producing a molded product using the waste further comprising a pretreatment step of removing and washing the metal and the like contained in the waste wood and waste plastic before the grinding step.

In another aspect, the present invention provides a method for producing a molded product using the waste to be melted while conveying about 1 to 2kg / min because there may be undissolved components in the melting step of the mixed melting step.

In another aspect, the present invention provides a method for producing a molded product using waste having a temperature of 10 to 20 degrees.

In addition, the present invention is the cooling device is installed directly below the extrusion port, the tapered inclined surface is formed toward the bottom in order to improve the surface smoothness of the extrudate while ensuring the uniformity of the thickness is the end portion of the inclined surface is the same as the diameter of the extrudate It provides a method for producing a molding using the waste formed.

In another aspect, the present invention provides a method for producing a molded product using waste containing 5 to 10 parts by weight of cheondamyeon powder or colorant with respect to the mixture 100 of the waste wood and waste plastic in the mixed melting step.

The present invention also provides a molded article produced by the above methods.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the meanings indicated are intended to aid the understanding of the invention. Accurate or absolute figures are used to assist in the prevention of unfair use by unscrupulous infringers.

1 is a view showing a manufacturing process according to an embodiment of the present invention. As shown in Figure 1, the molded article according to the present invention may be prepared through a grinding step, a mixed melting step, an extrusion step, a quenching step, a post treatment step, and a molding step.

Referring to the grinding step first, the molding according to the present invention can be produced as waste wood and waste plastic. The waste wood may include both by-products of general building materials and other wood components. In addition, the waste plastic includes both thermosetting and thermoplastic components, and preferably, may be polyolefin-based, polyvinyl-based or polyamide-based.

The waste wood and waste plastics may be ground and mixed in a ratio of 6: 4 to 5: 5 by weight. If the waste wood is included in less than the above range there is a problem that the physical properties of the final molded product is lowered, if the waste wood exceeds the above range there is a disadvantage that the surface characteristics of the molded product is not uniform. The size of the crushed particles is suitable 50 to 100 mesh.

Meanwhile, the pretreatment step of removing and washing the metal component included in the waste wood before the crushing step may be selectively performed. For example, when the building interior material is used as waste wood, it is less necessary to go through the pretreatment step, but the exterior material may contain components that inhibit the properties of the molding, so that metal materials can be removed and washed.

Meanwhile, the pulverized particles are subjected to the mixed melting step without being stored or aged. When the pulverized particles are stored or aged for a separate period of time as a result of the inventors' test, the pulverized particles are agglomerated with each other under the influence of static electricity and inhibit homogeneous mixing when they are mixed or melted by a mixer, and cosmetic melts The problem remains. It is therefore desirable to mix and melt through a mixer immediately upon grinding.

The mixed melting step according to the present invention can be mixed with a static mixer. Melt at the same time as the mixing, but the melting temperature is preferably 180 to 220 degrees. The range may vary depending on the feed rate, and if the temperature is less than the temperature, there is a problem in that a large amount of cosmetic melts are generated. If the range is exceeded, the polymer component is deteriorated to deteriorate physical properties. In addition, since the unmelted component may be present in the melting process, it is preferable to melt it while transferring about 1 to 2 kg / min.

The mixture of the crushed and molten waste wood and waste plastic is subjected to an extrusion step. Extrusion conditions, although the shape is different depending on the conditions of the final molding, the panel shape is preferred.

The extruded melt is quenched by the chiller 230 shown in FIG. The temperature of the chiller is preferably 10 to 20 degrees. As shown in FIG. 2, the extruded melt 250 is quenched immediately by the cooling device 230 formed immediately below the extrusion hole 211 immediately after being extruded. When the crystallization proceeds, the rigidity is expressed in the longitudinal direction and the tensile strength or the breaking strength is improved, but the powders of the waste wood pulverized in the crystallization step are pushed together. There is a problem that the powder is exposed to the surface of the extrudate or is unevenly distributed within the extrudate. Therefore, in the present invention, the pulverized waste wood particles may be positioned inside the extrudate by forming the polymer component of the extrudate into a microcrystalline region (amorphous region) before crystallization.

In addition, the extrudate 250 has a die-swell phenomenon in which the diameter of the extrudate 211 is larger than that of the extrusion port 211. The die swell region 251 is formed into an amorphous region by quenching to form an original diameter, and at the same time, forms the inclined surface 231 tapered toward the lower portion of the cooling device 230 so that the distal end portion of the inclined surface 231 has a diameter of a predetermined extrudate. By doing the same as the role of improving the surface smoothness of the extrudate while ensuring the uniformity of the thickness.

After the quenching step, the extrudate may be post-processed by the roller shown in FIG. 3. The post-treatment step is meant to remove potential energy contained in the amorphous region formed in the quenched extrudate. That is, since the extrudate is not completely cooled, the molecular chain may be microscopically changed to crystallize the amorphous region, thereby causing a macroscopic change in shape such as torsion in the extrudate. Therefore, as shown in FIG. 3, the extrudate passes between rollers having different grip points, thereby eliminating the shape change due to the recrystallization.

The extrudate after the post-treatment step may be molded into size and shape as required by the final product.

Meanwhile, as another example of the present invention, the mixed melting step may further include a phylite rock powder. Natural rock has an antibacterial property and far-infrared radiation. The feldspar rock may be included in an amount of 5 to 10 parts by weight based on the waste wood and the waste plastic 100 according to the present invention, it is preferably included in the powder form of 50 to 100 mesh. In addition, the mixed melting step may further include a pigment and other coloring agents.

As described above, the molded article using the waste according to the embodiment of the present invention and a method of manufacturing the same have advantages in that the surface is smooth and the strength of the surface is uniform compared to the molded article manufactured by the press method.

In addition, the molded article using the waste according to an embodiment of the present invention and its manufacturing method has the advantage that the preservation and the use period is extended by less deformation by removing the internal stress (stress) in advance.

In addition, the molded article using the waste according to an embodiment of the present invention and its manufacturing method has the advantage of excellent productivity by being manufactured by the extrusion method.

In addition, the molded article according to the embodiment of the present invention has an advantage of being environmentally friendly and excellent in antibacterial and deodorization.

In addition, the molding according to the embodiment of the present invention can be used as interior and exterior building materials and has the advantage that it can be used for a long time.

The present invention will be described below as examples.

Example 1

5 kg of waste wood, in which metals such as nails were removed in advance, and 5 kg of agricultural waste vinyl (PE, polyethylene) were mixed and crushed into 70 mesh. The pulverized product was mixed with a static mixer, melted at 180 degrees, and extruded to a width of 12 mm. After extrusion was quenched to 15 degrees, the internal stress was removed with five continuous rollers, and then formed into a width X length X width 120 X 240 X 12 mm. (Process speed is 1.2kg / min)

Example 2

The same as in Example 1, and further comprises 700g of the chalcedony powder in the pulverized product was formed into a diameter of 50mm.

Figures 4a and 4b is a photograph of the product produced in Examples 1 and 2 it can be seen that the surface is very smooth and smooth.

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

1 is a manufacturing process of the molding according to an embodiment of the present invention.

Figure 2 is a cross-sectional view of the extrusion port and the cooling device according to an embodiment of the present invention.

3 is a conceptual diagram of a post-processing step according to an embodiment of the present invention.

4a and 4b are photographs of the moldings produced by Examples 1 and 2;

Claims (7)

In the manufacturing method of the molding using waste, A pretreatment step of removing and washing metal components contained in waste wood and waste plastic; Based on the weight of waste wood and waste plastics, the ratio is 6: 4-5: 5, and 5 to 10 parts by weight of the chalcedony powder is further mixed with respect to 100 parts by weight of the mixture of the waste wood and waste plastics, and then into a powder form of 50 to 100 mesh. Grinding; Melting the waste plastic at 180 to 220 degrees while mixing with a static mixer without storing or aging the ground particles; Extruding the mixture of the pulverized and molten waste plastic and waste wood and feldspar powder; The extruded melt is quenched in a chiller at 10 to 20 degrees; A post-treatment step of removing the internal stress between the rollers having different grip points from the extrudate through the quenching step; And Method for producing a molding using the waste comprising the step of molding the post-treated extrudate to a final predetermined form. delete The method of claim 1, In the mixed melting step, there may be a non-melting component in the melting process, the method of producing a molding using waste to be transported at 1 to 2kg / min while melting. delete The method of claim 1, The cooling device is installed directly below the extrusion port, and the tapered inclined surface is formed toward the bottom in order to improve the surface smoothness of the extrudate while ensuring the uniformity of the thickness. Method for producing a molded article used. delete A molded article using the waste produced by the method of any one of claims 1, 3 and 5.

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