KR20160046590A - Manufacturing method of wpc - Google Patents
Manufacturing method of wpc Download PDFInfo
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- KR20160046590A KR20160046590A KR1020140142715A KR20140142715A KR20160046590A KR 20160046590 A KR20160046590 A KR 20160046590A KR 1020140142715 A KR1020140142715 A KR 1020140142715A KR 20140142715 A KR20140142715 A KR 20140142715A KR 20160046590 A KR20160046590 A KR 20160046590A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/28—Moulding or pressing characterised by using extrusion presses
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The present invention relates to a method for manufacturing a WPC, comprising the steps of: (S10) forming a semi-carbonized wood powder by semi-carbonizing a wood chip to produce semi-carbonized wood powder; Semi-carbonized wood powder crushing step (S20) of crushing semi-carbonized wood powder; A mixed raw material producing step (S30) of mixing raw semi-carbonized wood powder, plastic resin, and additives to produce a mixed raw material; A mixed raw material extruding step (S40) in which the mixed raw material is heated and simultaneously extruded while being pressurized; And a press working step (S50) of filling the extruded mixed raw material into a press mold and pressurizing the press mold through a hydraulic press.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a WPC manufacturing method for manufacturing synthetic wood (WPC = Wood Plastic Composite), and more particularly, to a WPC manufacturing method capable of manufacturing WPC having various sizes and shapes.
Generally, synthetic wood (WPC = Wood Plastic Composite, hereinafter referred to as WPC) is attracting attention as an eco-friendly material. In particular, it is an eco-friendly, non-toxic product that combines wood-crushed material with olefin-based polymer resin and extrudes or extrudes it at high temperature and high pressure.
This WPC is a new new material that compensates for the disadvantages of wood, water resistance, moisture resistance and insecticide. It is excellent in weatherability and insecticide without any preservative treatment, has no damage by microorganisms, can have various colors, And has a semi-permanent life time in which elasticity, tensile strength, bending strength, compressive strength and impact strength are excellent, and deformation occurs in external physical impact. In addition, formaldehyde and volatile organic compounds (VOCs) are not harmful to the human body because of their low emission. Composite timber after a certain period of time can be recycled through processes such as grinding after collection.
On the other hand, such a WPC and its manufacturing method are disclosed in detail in Patent Publication No. 10-2012-0110953.
However, the conventional WPC manufacturing method has a problem that it is not possible to manufacture a WPC having various sizes and shapes as well as a slow production rate because WPC is manufactured by extrusion or injection molding.
In addition, since the WPC according to the prior art is produced by using WPC as it is, there is a problem that the bonding force of WPC is weak and a separate binder is required to be included in the WPC.
SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above problems, and an object of the present invention is to provide a WPC manufacturing method capable of producing a WPC molded product of various sizes and shapes by press- .
Another object of the present invention is to provide a method for manufacturing a WPC by using a semi-carbonized semi-carbonized wood powder after drying a wood chip and manufacturing the WPC, thereby minimizing the use of the binder and the increase of the bonding strength of the WPC.
As a means for solving the above-mentioned problems, a method of manufacturing a WPC according to the present invention includes: a semi-carbonized wood powder manufacturing step (S10) of producing semi-carbonized wood powder by semi-carbonizing wood chips; Semi-carbonized wood powder crushing step (S20) of crushing semi-carbonized wood powder; A mixed raw material producing step (S30) of mixing raw semi-carbonized wood powder, plastic resin, and additives to produce a mixed raw material; A mixed raw material extruding step (S40) in which the mixed raw material is heated and simultaneously extruded while being pressurized; And a press working step (S50) of filling the extruded mixed raw material into a press mold and pressurizing the press mold through a hydraulic press.
Here, the press working step (S50) includes a primary press forming step (S51) of filling the extruded mixed raw material into the first press mold and pressurizing the press mold with a high load through a primary hydraulic press to form the press mold; And a secondary pressurizing and cooling step (S52) of inserting the temporary WPC formed product produced in the primary press forming step (S51) into the second press mold and then cooling it while pressurizing to a low load through the secondary hydraulic press have.
The first press may be used with two or more second presses.
The number ratio of the first press and the second press may be determined by the time ratio required in the primary press-molding step and the secondary press-cooling step.
In the semi-carbonized wood powder manufacturing process, the wood chips may be provided in a size of 1 to 50 mm.
The semi-carbonized wood powder mill can crush semi-carbonized wood powder to a size of 0.1 to 0.5 mm.
The raw material mixture may be prepared by mixing the raw materials in a ratio of 62 to 76% by weight of barium carbonate, 13 to 27% by weight of a plastic resin, and 2 to 12% by weight of an additive.
In the press working step, the primary hydraulic press can press the extruded mixed material at a high load of 31 to 100 kgf / cm 2 .
The primary hydraulic press can be pressurized for 1 to 10 minutes.
In the secondary pressure cooling step (S52), the secondary hydraulic press can press the temporary WPC molded article with a low load of 5 to 30 kgf / cm < 2 >.
The secondary hydraulic press can be pressurized for 11 to 30 minutes.
The second pressurizing and cooling step (S52) can cool the temporary WPC molded article which is sprinkled on the second press mold and inserted into the second press mold by water cooling.
In the semi-carbonized wood powder production step (S10), the wood chip is dried and then semi-carbonized to produce semi-carbonized wood powder, and the moisture content of the dried wood chip may be 3 to 7%.
The WPC manufacturing method according to the present invention may further include a WPC molded product processing step (S60) of processing the finished WPC molded product after the pressing step (S50).
Embossing and surface coating in the WPC molding process step (S60).
According to the present invention, it is possible to produce a WPC molded product having various sizes and shapes by extruding semi-carbonized wood powder to produce an extruded mixed raw material, and then pressing the extruded mixed raw material through a hydraulic press.
Further, according to the present invention, the use of semi-carbonized wood powder which is a semi-carbonized wood chip can increase the bonding force of the molded WPC molded product, and the use of the bonding agent can be minimized.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart illustrating a method of manufacturing a WPC according to the present invention.
Figure 2 compares the productivity of a single press and a double press.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.
As shown in FIG. 1, the method for manufacturing a WPC (Wood Plastic Composite) according to the present invention is for molding a WPC molded product having various sizes and shapes by extruding semi-carbonized wood and plastic resin, The method may include the steps of producing carbonized wood powder S10, crushing semi-carbonized wood powder S20, producing a raw material mixture S30, extruding a mixed raw material S40, and pressing a S50. Step S60 and WPC finished product completion step S70.
Hereinafter, a method of manufacturing a WPC according to an embodiment of the present invention will be described in detail.
Ⅰ. Semi-carbonization Rumor Manufacturing stage
The semi-carbonized wood powder production step S10 is for producing a semi-carbonized wood powder by semi-carbonizing the wood chip as a raw material. The wood chip preparing step S11, the wood chip breaking step S12, the wood chip drying step S13, Wood chip semi-carbonization step (S14).
In the wood chip preparation step (S11), wood chips such as wood byproducts, wood pulp, sawdust, and forest remnants are prepared.
In the wood chip breaking step S12, prepared wood chips having various sizes are crushed to a predetermined size or less through a crushing device (not shown). At this time, the prepared wood chips can be crushed to a size of 30 to 100 mm, preferably 30 to 50 mm. This is to minimize the half-carbonization time of the wood chip, while obtaining uniform semi-carbonized wood powder.
In the wood chip drying step (S13), the shredded wood chips are dried in a drying facility (not shown). At this time, the drying equipment is to dry wood chips crushed for about 30 minutes to 60 minutes at a temperature of 180 to 210 ° C., and a dried wood chip having a moisture content of about 6 to 40% can be obtained. A rotary dryer of rotary type can be used as the drying equipment, but is not limited thereto.
In the wood chip semi-carbonization step (S14), the dried wood chip is supplied to a semi-carbonization facility (not shown) of an indirect heating system to be semi-carbonized. At this time, the semi-carbonizing plant indirectly heats wood chips dried for about 60 ~ 90 minutes at a temperature of 200 ~ 280 ° C, thereby producing semi-carbonized wood powder.
On the other hand, in the wood chip semi-carbonization step (S14), selective structure breakage of the hemicellulose component among hemicellulose, lignin and cellulose components, which are three main constituents of the wood, occurs, The chip exhibits characteristics such as low water absorption, improvement of crushing property and decrease of hydrophilicity while having ligneous properties. On the other hand, hemicellulose is decomposed through the wood chip semi-carbonization step, and 10 to 80% by weight, preferably 20 to 50% by weight, of 100% by weight remains.
Since the semi-carbonized wood powder itself has a low water content, the use of semi-carbonized wood powder for WPC commercialization has the effect of improving water resistance. Conventional WPC products using ordinary wood chips or sawdust have a weight increase ratio of 8% after flooding for 48 hours, but have a water content of less than 1% when semi-carbonized wood powder is applied.
In addition, in the case of conventional WPC products, cellulose components, which are the main components of wood powder, are decomposed by microorganisms or bacteria, resulting in problems such as defects after the product is applied. In case of using semi-carbonized wood powder, As the chip is destroyed in the semi-carbonization stage, it can block the penetration of microorganisms or bacteria.
In the semi-carbonized wood powder production step S10, the prepared wood chips are pulverized, dried and semi-carbonized to obtain semi-carbonized wood powder, and then a semi-carbonized wood powder pulverization step (S20) is performed.
Ⅱ. Semi-carbonization Wood powder crushing step
The semi-carbonized wood powder pulverization step S20 is a step of pulverizing the semi-carbonized wood powder produced through the semi-carbonized wood powder production step S10 to a predetermined particle size or less, thereby cooling the semi-carbonized wood powder S21 . Since the semi-carbonized wood powder may be aggregated when the heated semi-carbonized wood powder is immediately pulverized, the semi-carbonized wood powder may be cooled by first cooling the heated semi-carbonized wood powder to prevent aggregation. There is no restriction on the cooling method of the heated semi-carbonized wood powder, and the natural cooling method is also possible.
After the semi-carbonized wood powder cooling step S21, the cooled semi-carbonized wood powder is pulverized to a size of 0.1 to 0.5 mm, preferably 0.1 to 0.3 mm, through a pulverizer (not shown). In order to reduce the particle size of the crushed semi-carbonized wood powder to 0.1 or less, there is a problem that a special grinding apparatus is required, which causes a lot of time and expense. When the particle size of the crushed semi-carbonized wood powder is 0.5 mm or more, There is a problem that the pores are formed between the carbonized wood powder and the bonding force is lowered.
In the semi-carbonized wood powder mill (S20), the semi-carbonized wood powder heated through the wood powder manufacturing step (S10) is cooled and ground to a particle size equal to or less than a predetermined particle size to obtain semi-carbonized wood powder. .
Ⅲ. Mixed raw material production step
In the mixed raw material producing step S30, the mixed raw material is produced by mixing the semi-carbonized wood powder, the plastic resin, and the additives, which are pulverized through the semi-carbonized wood powder crushing step S20, and the binding strength and strength of the semi-carbonized wood powder are increased .
The mixed raw material producing step S30 may include a raw material preparing step S31, a primary raw material mixing step S32, and a secondary mixing step S33.
In the raw material preparation step (S31), raw materials of 62 to 76% by weight of semi-carbonized wood grain bran charcoal, 13 to 27% by weight of plastic resin and 2 to 12% by weight of additives are prepared. The additive may be selected from the group consisting of 1 to 5% by weight of pigments for color development, 1 to 5% by weight of coupling agents for increasing the bonding strength between the semi-carbonized wood and the plastic resin, 2% by weight of other additives for improving productivity, .
The cross-linking agent is used to increase the bonding force between the composite thermosetting resin and the wood powder. The cross-linking agent causes a new chemical bond at the interface between the two materials by the binder, and the modulus of rupture, MOR) and modulus of elasticity (MOE), and also affects dimensional stability, impact strength and dispersibility of materials.
In the case of conventional WPC products, a cross-linking agent is added to improve the cross-linking effect between the wood and the plastic resin. However, when the semi-carbonized wood powder is used, the addition amount of the cross-linking agent can be reduced due to the increase in the hydrophobicity of the wood powder in the wood chip half- . The amount of the cross-linking agent to be added to the conventional WPC product is about 5 to 8% by weight. In the case of semi-carbonized wood powder, however, the addition of 1 to 5% by weight may improve the physical properties.
Other additives may include ultraviolet stabilizers, antioxidants. In the case of UV stabilizers, the polymer material contained in the molding material according to the present invention is decomposed by heat as well as heat and aging occurs. Especially, ultraviolet ray of 290 ~ 400nm in sunlight has a strong energy and it plays a main role of plastic aging such as discoloration of plastic, surface, cracking, and deterioration of mechanical properties. Examples of the substance capable of preventing physical and chemical property deterioration caused by light include benzophenone (hydroxybenzophenone, etc.), benzotriazole (2-hydroxy phenyl benzotriazole, etc.), hindered amines, 2,4-di-tert-butylphenyl-3,5-di-tert-butyl-hydroxybenzoide, etc.), organic nickel compounds Etc. may be used. Antioxidants are used to inhibit deterioration, deterioration, cracking, discoloration, etc. of degradation or physical properties due to the effects of oxygen, heat, light and the like in the molding process or molded product during the synthetic wood manufacturing process under practical environmental conditions In the examples of the present invention, antioxidants of amines can be used.
When the preparation of the raw material is completed, the raw materials of 62 to 76% by weight of the prepared bentonized wood, 13 to 27% by weight of the plastic resin and 2 to 12% by weight of the additive are put into a mixer (not shown) and mixed. The rotating blade disposed in the mixing space of the blender is rotated to mix the semi-carbonized wood powder, plastic resin and additives added into the mixing space, thereby obtaining a mixed raw material.
Here, the rotating blade can be controlled in two stages. That is, the rotating blade is mixed with the semi-carbonized wood powder, the plastic resin, and the additive in a single stage (first stage raw material mixing step (S32)) while rotating at a low speed of 450 rpm in the first stage, The plastic resin and the additive can be uniformly mixed (step S33).
In addition, the blending space temperature of the blender can be raised to 120 ° by the heat generated by friction between the semi-carbonized wood powder, the plastic resin and the additive, and the residual moisture contained in the raw materials is vaporized And then discharged through a separate water vapor pressure discharge nozzle.
In the mixed raw material producing step S30, semi-carbonized wood powder, plastic resin and additives are mixed to obtain a mixed raw material, and then a mixed raw material extruding step (S40) is performed.
IV. Mixed raw material Extrusion step
In the mixed raw material extruding step (S40), the mixed raw material produced by the mixed raw material generating step (S30) is heated and simultaneously extruded while being pressurized.
The extrusion apparatus includes an extrusion main body having an extrusion space in which an inlet for introducing a raw material mixture and an outlet for discharging are formed, and a horizontal double shaft which is provided in the extrusion space and processed into two helical shapes, An agitating part for extruding the mixed raw material through the outlet while pressurizing the mixed raw material, and a heating part for heating the mixed raw material introduced into the extruding space.
In the mixed raw material extruding step (S40), the heating section of the extruding apparatus is first operated to heat the extruding space to a temperature of 125 to 225 DEG, and the stirrer is rotated. In this state, the mixed raw material is introduced into the extrusion space through the inlet. Then, the mixed raw material charged into the mixing space is heated to 125? To 225 ?, and at the same time, the mixed raw material heated and compressed through the outlet is extruded while being pressurized by the agitator.
In the mixing raw material extrusion step (S40), the mixed raw materials are mixed again and heated simultaneously by an agitator. At this time, as the mixed raw materials are heated, the plastic resin is liquefied and homogeneously mixed with the other raw materials to increase the bonding force. The bonding force of the extruded mixed raw materials can be stably maintained even if the content of the binder is greatly reduced.
The mixed raw materials which are heated and compressed are discharged in the form of particles having a size of 1 to 10 mm, and the temperature of the discharged raw materials is maintained at about 150 to 200 ° C., preferably 160 to 180 °.
In the mixed raw material extruding step (S40), the mixed raw material is heated and simultaneously extruded under pressure to obtain an extruded mixed raw material. Thereafter, a press machining step S50 is performed.
Ⅴ. Pressing step
In the press working step (S50), the mixed raw material extruded by the mixed raw material extruding step (S40) is filled in the press mold. The surface temperature of the packed mixed material is about 150? Or more, and the mixed raw material is pressure-molded by a hydraulic press molding machine.
In the method of manufacturing WPC according to the prior art, WPC is produced by extrusion molding. However, in the extrusion molding method, production is limited to 1 ton or less per hour, and there is a limit in productivity. The WPC produced by extrusion molding has a limitation in size, It is bound to be limited. However, as in the present invention, when the WPC production method is press-processed, production of 8 tons or more per hour is possible, large-scale WPC production is possible, and productivity and applicability in various fields can be improved.
The lowering speed of the upper slide of the hydraulic press is slowly lowered to about 10 mm / sec to pressurize the raw material in the mold to effectively exhaust the gas present in the raw materials filled in the mold. If the degassing is not performed properly, cracks of the product may occur and the product may be defective.
The press working step (S50) is for producing a WPC molded product by pressurizing through a hydraulic press, and may include a primary press forming step (S51) and a secondary pressure cooling step (S52).
Primary press forming step
In the primary press forming step S51, the extruded mixed raw material is filled in the first press mold and then pressurized at a high load through the primary hydraulic press to produce a temporary WPC molded product having the external shape of the WPC molded product. At this time, the primary hydraulic press presses the mixed raw material filled in the first press mold for 1 to 10 minutes under a high load of 31 to 100 kgf / cm 2 , preferably 40 to 60 kgf / cm 2 .
If the primary hydraulic press to press with a load of less than 31kgf / cm 2, a problem of reduction in strength of the product filling lack of the final product occurs and, 100kgf / cm 2 There is a problem that cracks are generated in the final product after molding.
Secondary pressure cooling stage
In the secondary pressurizing and cooling step S52, the temporary press forming mold having the outer shape formed by the primary press forming step S51 is filled in the second press mold, and then cooled while being pressurized with a low load through the secondary hydraulic press, Thereby completing the molded product. If pressurization is not maintained, the product may be deformed by the heat of condensation possessed by the temporary WPC molded product. Accordingly, in order to solve such a problem, the present invention has been modified to prevent the deformation of the temporary WPC molded article by applying a secondary pressurizing and cooling step in which the raw material is compressed while being pressurized by a low load after the primary press forming step.
The second press mold may have the same size and shape as the first press mold, in order to prevent the appearance change of the temporary WPC molded product. The secondary hydraulic press is pressed with a minimum load to prevent the deformation of the temporary WPC molded part. The load applied at this time is 5 to 30 kgf / cm 2 , And preferably 5 to 10 kgf / cm 2 . In order to improve the cooling rate, it can be cooled while being pressurized with a low load for about 30 minutes by water cooling.
Referring to FIG. 2, when the productivity of a single press and a double press is compared, the time required to produce two WPC molded articles in a single press when the time schedules are the same for each process is [fill (5 minutes) + (10 minutes) + second pressure cooling (30 minutes) + discharge (5 minutes)] X 2 = 100 minutes. On the other hand, the time required to produce two WPC molded products with a double press is [filling (5 minutes) + primary pressure forming (10 minutes)] X 2 + Min) = 65 minutes, it can be confirmed that the use of the double press improves the productivity compared with the use of the single press.
In addition, since the primary press requires high pressurization, it is inevitable to use an expensive press. However, the secondary press can be pressurized by only a minimal load to prevent deformation of the molded product, so that a low-cost press can be used. Therefore, when a combination of one high-priced primary press and four low-cost secondary presses is used, it is advantageous to lower the equipment cost and improve the productivity by two times, compared with the use of two expensive single presses .
On the other hand, the ratio of primary pressing and secondary pressing can be adjusted from 1: 2 to 1: 6 in consideration of the time required for the primary pressing step and the time required for the secondary pressing and cooling step. For example, if it takes 10 minutes for the primary press forming step and 30 minutes for the secondary pressurizing and cooling step, the ratio of primary press and secondary press number can be set to 1: 3.
Further, when the press forming and the pressurizing and cooling are simultaneously performed in a single press, a cooling water removing process for removing the cooling water used in the previous pressurizing and cooling step during the press-molding of the next mixed raw material is further required. On the other hand, if the process is performed separately in the primary press forming step and the secondary pressurizing and cooling step and no cooling water is used in the primary press forming step, a separate process for removing cooling water is unnecessary, Since there is no problem even if there is cooling water in the car pressurized cooling stage, the double press does not need a separate cooling water removal step, which can further improve the productivity.
The WPC molded article molded by the press working step S50 can be commercialized, and the WPC molded article processing step S60 can be further performed.
VI. WPC Step of molding
In the WPC molded product processing step (S60), the WPC molded product completed by the pressing step (S50) can be cut to make a WPC product having a size and shape (shape). In addition, letters, patterns and drawings can be drawn on the surface of WPC molded parts, and WPC products can be completed by sanding, embossing and surface coating.
Claims (15)
A semi-carbonized wood powder crushing step (S20) of crushing the semi-carbonized wood powder;
A mixed raw material producing step (S30) of mixing raw semi-carbonized wood powder, plastic resin, and additives to produce a mixed raw material;
A mixed raw material extruding step (S40) of heating and simultaneously extruding the mixed raw material under pressure;
And a press working step (S50) of filling the extruded mixed raw material into a press mold and pressurizing through a hydraulic press.
The pressing step (S50)
A primary press forming step (S51) of filling the extruded mixed raw material into the first press mold and pressurizing the press mold with a high load through a primary hydraulic press; And
And a secondary pressurizing and cooling step (S52) of inserting the temporary WPC formed product produced in the primary press-molding step (S51) into the second press mold and then cooling it while pressurizing with a low load through the secondary hydraulic press Gt; WPC < / RTI >
Wherein the first press is used with two or more of the second presses.
Wherein the ratio of the number of the first presses to the number of the second presses is determined by the time ratio required in the primary press forming step and the secondary pressurizing cooling step.
Wherein the wood chip is provided in a size of 1 to 50 mm in the step of producing the semi-carbonized wood powder.
Wherein the semi-carbonized wood powder is pulverized to a size of 0.1 to 0.5 mm.
Wherein the primary hydraulic press presses the extruded mixed raw material at a high load of 31 to 100 kgf / cm < 2 > in the pressing step.
Wherein the primary hydraulic press is pressurized for 1 to 10 minutes.
Wherein in the secondary pressure cooling step (S52), the secondary hydraulic press presses the temporary WPC molded article with a low load of 5 to 30 kgf / cm < 2 >.
And the secondary hydraulic press is pressurized for 11 to 30 minutes.
Wherein the second pressurizing and cooling step (S52) comprises cooling the temporary WPC molded product inserted into the second press mold by spraying water onto the second press mold.
In the semi-carbonized wood powder production step (S10), the wood chips are dried and then semi-carbonized to produce semi-carbonized wood powder,
Wherein the dried wood chip has a moisture content of 3 to 7%.
Further comprising a WPC molded product processing step (S60) of processing the finished WPC molded product after the pressing step (S50).
Embossing, and surface coating in the WPC molded product processing step (S60).
Wherein the semi-carbonized equipment temperature condition is adjusted to 200 to 280 ° C in the semi-carbonized wood powder production step.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018097401A1 (en) * | 2016-11-28 | 2018-05-31 | (주)경동월드와이드 | Synthetic wood, decorative laminate comprising same and manufacturing method therefor |
| CN108189191A (en) * | 2017-12-29 | 2018-06-22 | 连城县丰海竹木业有限公司 | A kind of production technology that environmentally friendly Wood-plastic floor is made using waste wood |
| WO2018124377A1 (en) * | 2017-01-02 | 2018-07-05 | (주)경동월드와이드 | Manufacturing method for wpc board and flattening apparatus |
| KR102012663B1 (en) * | 2019-01-28 | 2019-08-22 | (주)승진바이오 | Method for manufacturing synthetic wood containing semi-carbonized wood powder |
| KR102038841B1 (en) * | 2019-01-28 | 2019-11-01 | (주)승진바이오 | Method for manufacturing synthetic wood containing semi-carbonized wood powder and activated carbon |
| KR20200128257A (en) * | 2019-05-02 | 2020-11-12 | 주식회사 에이치티 | Synthetic wood adhesion type natural wood and manufacturing method thereof |
| KR20220146337A (en) * | 2021-04-22 | 2022-11-01 | (주)에프씨코리아랜드 | Eco-friendly cork tile and method for manufacturing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20120110953A (en) | 2011-03-31 | 2012-10-10 | 주식회사 이루켐 | Wood polymer comoisits and the manufacturing method of the same |
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2014
- 2014-10-21 KR KR1020140142715A patent/KR20160046590A/en not_active Application Discontinuation
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120110953A (en) | 2011-03-31 | 2012-10-10 | 주식회사 이루켐 | Wood polymer comoisits and the manufacturing method of the same |
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| WO2018124377A1 (en) * | 2017-01-02 | 2018-07-05 | (주)경동월드와이드 | Manufacturing method for wpc board and flattening apparatus |
| KR20180079770A (en) * | 2017-01-02 | 2018-07-11 | (주)경동월드와이드 | Manufacturing method of wpc board and leveling equipment |
| CN108189191A (en) * | 2017-12-29 | 2018-06-22 | 连城县丰海竹木业有限公司 | A kind of production technology that environmentally friendly Wood-plastic floor is made using waste wood |
| KR102012663B1 (en) * | 2019-01-28 | 2019-08-22 | (주)승진바이오 | Method for manufacturing synthetic wood containing semi-carbonized wood powder |
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