KR101809196B1 - Base Materials and Their Manufacturing Method Using Composite Material - Google Patents

Abstract

The present invention relates to a floor material using a composite material and a manufacturing method for the same. Specifically, a ratio of a composite material in which a synthetic resin and a mixed material are mixed is controlled, and fiberglass powder and one or more of calcium carbonate (stone), silica, soil cement, calcite, natural coke, limestone, chalk, iceland spar, and a clamshell are mixed in the mixed material. The composite material is supplied to a lower layer and an upper layer. As either a steel core or a mesh is inserted into a fiberglass mat between the upper layer and the lower layer, and the inserted one is flattened and formed by a vibrator. Also, the floor material using the composite material forms a strong flooring material, a stairs board, an interior material, and an exterior material by heat treatment. According to the present invention, the manufacturing method for the same comprises a raw material preparing step, a composite material mixing step, a composite material fusing and supplying step, an upper layer forming step, a middle layer forming step, and a lower layer forming step.

Description

TECHNICAL FIELD [0001] The present invention relates to a floor material using a composite material,

The present invention relates to a flooring material using a composite material and a method of manufacturing the same. More particularly, the present invention relates to a flooring material using a composite material, and more particularly, to a flooring material using a composite material and at least one of calcium carbonate (stone), silica, masato, calcite, beryllite, limestone, And the composite material obtained by mixing the synthetic resin and the synthetic resin is supplied to the lower layer and the upper layer, and one of the iron core and the mesh is inserted into the fiber mat between the lower layer and the upper layer, and a vibrator A floor material using a composite material composed of a stepped plate material, an interior and exterior material, and a manufacturing method thereof.

In addition to the development of plywood manufacturing technology, it is well known that a lot of plywood with excellent physical properties is provided, and the plywood is used. When it is used for flooring such as flooring and other building materials, And its surface is coated with a resin paint to impart resistance to water resistance and scratching.

As an example of manufacturing this kind of indoor flooring flooring, there is a method of manufacturing a flooring board by adhering a veneer single plate to a synthetic upper side with a urea resin, but it has a disadvantage in that the manufacturing cost is increased, and water resistance and heat resistance are very weak.

As another example, in the case of a floor board manufactured by pressing a melamine resin impregnated paper (LPM) on the upper surface of a heavy fiberboard (MDF) at a high temperature and a high pressure, there is an advantage that manufacturing cost can be reduced. However, There are disadvantages.

In addition, although the plywood or heavy fiber boards used as the base material are usually processed in the dried state, the environment used and installed on the inner floor of the actual building is changed by the season and the change of the room temperature and humidity due to the change of seasons such as summer and winter, There is a phenomenon in which the connection site is widened or widened due to the internal stress caused by the shrinkage and swelling action, and it is difficult to maintain the initial bonding condition by chemical deterioration, and there are disadvantages such as diminished dimensional stability and water resistance . Also, it has a defective base plate because it is prohibited to use because it is harmful to the human body by adding toxic chemicals during preservation process.

On the other hand, the reinforced floor using HDF (Hight Density Fiderboard) can perform click processing and suspension construction, but it can strengthen the surface strength. However, since natural veneer can not be used, natural texture degradation and water resistance And it has a disadvantage of heavy weight.

In order to solve such a problem, Utility Model Registration No. 0399316 discloses an ondol floor of a wood fiber (wood particle) -propylene fiber composite base material.

The WPC (Wood Fiber Poiypropylene Hiber Composite Panel) is used as the main substrate of the ondol floor in the above-mentioned prior art, so that the water resistance which is the greatest disadvantage of the reinforced floor can be compensated. The disadvantage of the plywood floor complements the impact resistance, There is a problem that it is considerably difficult to obtain a flooring having a surface with a high gloss and a low scratch resistance due to the characteristics of the surface sheet.

In addition, in the case of the conventional plywood flooring, the veneer is adhered on the plywood, followed by coloring and coating by the roll coater, and the synthetic resin is forcedly injected into the veneer to reduce the surface hardness However, since the coloring process is performed by a roll coater in the case of coloring, it is impossible to directly use the wood (pattern) possessed by wood, which is an advantage of the veneer, and the disadvantages of surface hardness, surface scratch resistance, abrasion resistance, Or paints such as epoxy and acryl-based coatings are thickly coated. This is because the strength is so strong that the flexibility is lowered and it is easily broken.

In contrast to this, WPC (Wood Polymer Composite) method among several developed techniques for reinforcing the surface strength is to increase the strength and hardness by impregnating wood veneer (veneer) with resin, In some cases, the resin is forced into the pores and cell layers of the wood in a state in which the wood veneer is not attached to the plywood and is hardened by forcibly injecting. However, due to the expansion and contraction of the wood due to moisture, There is a problem that a defective phenomenon such as cracking occurs.

On the other hand, in the case of the plywood manufactured by the melamine resin impregnation and overlay press method, when the veneer is laminated on the plywood, an overlay containing the veneer impregnated with melamine resin and aluminum oxide (Al2O3) is covered on the top of the veneer, , A high-pressure press is used to penetrate the inside of the veneer, which has a manufacturing method similar to that of a reinforced floor. However, this also has problems in that the economical efficiency in the production process is deteriorated due to an expensive cost and a troublesome working method, It is pointed out that it is difficult to obtain the surface texture by the coating method.

In order to prevent such disadvantages, calcium carbonate and synthetic resin are mixed in a weight ratio of 6: 4, and 97 to 99.8% by weight of the mixture, 0.2 to 3% by weight of a dye is mixed and stirred to form a lower layer; An intermediate layer formed with a fiber glass on the upper side of the lower layer; And an upper layer formed by mixing calcium carbonate and synthetic resin at a weight ratio of 7: 3 to the upper side of the intermediate layer and mixing and stirring 97 to 99.8% by weight of the mixture and 0.2 to 3% by weight of a colorant by molding. , But it does not require any shrinkage and expansion, and has good water resistance, heat resistance and durability. However, the time required for press molding is about 30 minutes and not only the consumption of press molding time but also the preparation time for press molding There is a problem in that productivity and economical efficiency are lowered due to a problem that it takes more than 40 minutes to perform the molding process as a whole because the time for separation from the post press and the time for demoulding are large.

Patent Registration No. 1685117 (registered on December 5, 2016) filed by the present applicant discloses that 97 to 99.8% by weight of a mixture of calcium carbonate, silica and masato and a synthetic resin in a weight ratio of 6: 4 and 0.2 By weight of a mixture of calcium carbonate and synthetic resin at a weight ratio of 7: 3 to the upper side of the intermediate layer and an intermediate layer composed of a glass fiber mat at an upper side of the upper layer of 3% by weight to 3% by weight and a coloring matter of 0.2 to 3% Wherein the intermediate layer is formed by supplying any one of a metal mesh and a metal core which is formed by joining the metal mesh and the metal mesh so as to be in a cross shape in a long interval, And the lower layer was molded to provide vibration for 250 to 350 seconds each.

However, since the upper side of the mold, that is, the bottom surface of the lower layer of the product, is formed irregularly so that the bottom is leveled, a separate post-processing must be performed. Therefore, a delay in processing time for post- And the mixing of the composite material is not uniformly performed, and various problems such as generation of pores in the interior of the composite material occur.

Patent Document 1. Registered Utility Model No. 0399316 (Registered on October 17, 2005) Patent Document 2. Patent Registration No. 0201866 (registered on Mar. 16, 1999) Patent Document 3. Patent Registration No. 0882530 (registered on Feb. 02, 2009) Patent Document 4. Patent Publication No. 10-2006-0100551 (published on September 21, 2006) Patent Document 5. Patent Registration No. 0875687 (Registered on December 17, 2008) Patent Document 6. Patent Registration No. 1685117 (Registered on December 05, 2016)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve such conventional drawbacks, and it is an object of the present invention to provide a method and apparatus for mixing a mixture of calcium carbonate (stone), silica sand, marzipan, calcite, beryllium, limestone, A composite material made of a material and a synthetic resin is melted and supplied to form an upper layer and a lower layer, and a fiber grass mat is supplied to the middle layer between the upper layer and the lower layer, and one of the iron core and the mesh is inserted, And the like.

The present invention relates to a composite material comprising a mixture of a calcium carbonate (stone), a silica, a marble, a calcite, And meshes. Therefore, it is stable and firmly installed without any shrinkage and expansion due to the thermal expansion coefficient when it is formed so as to be exposed to the outside, and is intended to be used as a flooring material for interior decoration with flame retardant.

The present invention aims to provide a lid at the top of the mold for leveling the lower layer and to prevent the lower layer from slipping and designing through the lid.

The present invention relates to a method for preparing a raw material for preparing a powder or liquid synthetic resin having a powder of calcium carbonate, silica, masato, calcite, beryllite, limestone, chalk, A composite material comprising 35 to 70 parts by weight of a powder of any one or more of calcium carbonate, silica, masato, calcite, beryllium, limestone, chalk, gypsum and clamshells and 28 to 60 parts by weight of a synthetic resin is fed to a mixer A composite material mixing step; Supplying the composite material to a mixing and melting furnace, and then causing the composite material to melt in an amount of 0.2 to 3 parts by weight based on 100 parts by weight of the composite material and 0.2 to 3 parts by weight of a curing agent by stirring; An upper layer forming step of forming an upper layer having a constant thickness by vibration of the vibrator; Forming an intermediate layer having a predetermined thickness by vibrating the vibrator by supplying any one of a mesh and an iron core to an upper side of the upper layer of the fiberglass mat; And a lower layer forming step of forming a lower layer having a predetermined thickness by vibrating the vibrator by supplying a raw material prepared on the upper side of the intermediate layer to a mold,
Wherein the composite material mixing step comprises mixing a mixture of 35 to 70 parts by weight of powder and 2 to 8 parts by weight of powdered glass powder and 28 to 60 parts by weight of synthetic resin,
The molten metal supplying step may include feeding the molten metal in a range of 3 to 15 on the upper side of the forming stand of the vibrator to fix the metal mold so that the metal mold does not move,
A heat treatment step of forming the lower layer by supplying the metal mold to the conveyor and forming the metal mold by heat treatment for 45 to 75 seconds in a heating furnace heated to 30 to 80 캜; Lt; / RTI >

delete

delete

delete

delete

delete

delete

delete

delete

delete

The present invention relates to a method for producing a composite material comprising a mixture material composed of a mixture of calcium carbonate (stone), silica, masato, calcite, beryllium, limestone, chalk, A bottom layer is formed, and a fiber mat is supplied to the middle layer between the upper layer and the lower layer, and one of the iron core and the mesh is inserted into the middle layer between the upper layer and the lower layer to flatten the three layers with an integrated flooring through a vibrator, And to provide a flooring material which enables the flooring to be provided.

The present invention relates to a composite material composed of a composite material and a synthetic resin in which calcium carbonate (stone), silica, masato, calcite, beryllium, limestone, chalk, And meshes. Therefore, it is stable because no shrinkage and expansion due to the thermal expansion coefficient occur even in a large change in temperature in a state where it is formed so as to be exposed to the outside after being molded, and it maintains a solid installation state having a stiffness of 30 times or more , As flame retardant, and as flooring material for interior decoration.

In order to make the lower layer horizontal, a lid is further provided on the upper part of the mold so that the lower layer is formed flat without being subjected to additional post-processing, and the lower layer is prevented from being horizontally slidable and various designs are formed through the lid The purpose

1 is a front view of a vibrator showing a preferred embodiment of the present invention;
Fig. 2 is a side view of the vibrator according to the present invention
Fig. 3 is a plan view of the installation state of the vibrator according to the present invention
Figure 4 is a partial perspective view of the mold of the present invention
5 is a cross-sectional view showing a molding process using the mold of the present invention
6 is a bottom view of a main part of the bottom molding lid of the present invention
7 is a perspective view showing a part of the flooring material of the present invention
8 is a bottom perspective view showing a part of the flooring according to the present invention.
Figure 9 is a partial enlarged cross-sectional view of the flooring of the present invention
10 is a block diagram illustrating a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of a vibrator showing a preferred embodiment of the present invention, FIG. 2 is a side view of the vibrator according to the present invention, and FIG. 3 is a plan view of the vibrator according to the present invention.

A pedestal 13 is positioned above a plurality of pillars 14 supported on the floor and a spring 12 is installed in the pedestal 13 at a predetermined interval in a range of 4 to 6, The shaping pedestal 11 is lifted upwards.

Motors 16 and 16a are provided in the lateral direction and the longitudinal direction on the lower side of the forming pedestal 11 and the motor shafts 17 and 17a protruding forward of the motors 16 and 16a are center- A rotor 18, 18a is provided.

An auxiliary column 15 protrudes from the pedestal 13 so as not to touch the forming pedestal 11 on the upper side of the column 14 and the mold 20 is supplied to the upper side of the forming pedestal 11, ) To be installed.

A mold 20 is provided on the upper side of the forming pedestal 13 to form a bottom 30 that allows the upper layer 35, the middle layer 36 and the lower layer 37 to be vibrated when the upper layer 35, .

The mold stopper 19 is installed in the molding pedestal 11 so as to provide a fixed state to the installation position without moving when the mold 20 is lifted.

FIG. 4 is a partially perspective view of a mold according to the present invention, FIG. 5 is a sectional view showing a molding process using the mold of the present invention, and FIG. 6 is a bottom view of a main part of the bottom molding lid of the present invention.

The mold 20 has different sizes, colors, and designs depending on the use position and use of the floor material 30;

A concave / convex portion 21 is formed between the planar portions 22a so as to form a "W" shape or various designs in a concave-convex form between the planar portions 22a, And a side wall 23 of height.

The upper layer 35, the intermediate layer 26 and the lower layer 37 are supplied to the metal mold 20 and then the bottom molding lid 40 is covered on the upper side to mold the flooring 30.

The bottom molding lid 40 is a bottom molding lid 40 that surrounds the entire side wall 23 of the mold 20 and is formed inside the bottom molding lid 40 to form a lower layer 37 of the flooring 30 horizontally, A protruding portion 42 designed in a concavo-convex shape is formed on the lower side of the design forming die 41. [

35 to 70 parts by weight of at least one powder selected from the group consisting of calcium carbonate (stone), silica sand, marathon, calcite, beryllite, limestone, chalk, gypsum and shell clay is firstly formed in the mold 20 And 2 to 8 parts by weight of powdered glass powder and 28 to 60 parts by weight of a synthetic resin are fed to a blender and mixed to supply the composite material to the mixing and melting furnace, 0.2 to 3 parts by weight of a curing agent and 0.2 to 3 parts by weight of a curing agent are supplied to the mixing and melting furnace and then melted and supplied to the projections and depressions 31 of the mold 20.

Since the mold 20 is installed on the upper side of the vibrator 10, the upper layer 35 is formed to have a constant thickness by vibration and the unevenness 31 and the plane 32 are formed on the outer side.

Either the mesh 39 or the iron core 40 is supplied to the fiber mat 38 having a weight of 2 to 8 parts by weight based on 100 parts by weight of the composite material on the upper layer 35 to form the intermediate layer 36 will be.

The composite material melted by heating to the upper side of the intermediate layer 36 is supplied to the lower layer 37 on the upper side of the intermediate layer 36 to form the floor material 30 through the vibrator 10.

The calcium carbonate is a calcium carbonate of the formula CaCO3 and is the most abundant salt in nature.

It also has various forms and exists as marble, calcite, berth, limestone, chalk, gypsum, shell shell, egg shell and coral.

Generally, it is a colorless crystal or white color with a specific gravity of 2.93 and decomposes at 825 ℃. When heated, it generates carbon dioxide and obtains quicklime.

Said silicate sand and Masato can be used individually or mixed at a certain ratio and mixed with calcium carbonate, but it is preferable to use them by drying.

Synthetic resin can be applied to all kinds of synthetic resin such as unsaturated polyester resin, vinyl ester resin, epoxyresin, urethane resin, polyethylene (PE), polypropylene (PP) This is possible.

It is possible to mix any one of the above-mentioned calcium carbonate, silicate and masato with the synthetic resin, or to mix at least two or more of them.

It is preferable that the lower layer 37 is used with any one of calcium carbonate, silica sand, and masato mixed with a middle fraction and a fine fraction in a ratio of 8: 2.

The thickness of the lower layer 37 is about 5 to 7 mm, the thickness of the intermediate layer 36 is about 1 to 3 mm, the thickness of the upper layer 35 is about 7 to 11 mm, and the total thickness is 13 to 21 mm.

And 0.2 to 3 parts by weight of the dye are mixed with any one selected from pigments necessary for variously supplying the color of the bottom material 30.

And 0.2 to 3 parts by weight of the curing agent are supplied to the mold 20 in a molten state after being supplied to the composite material mixed in the mixer together with the dye and then mixed so that the homogenized composite material is supplied in a molten state or a mixed state.

It is preferable to use fine powders such as calcium carbonate, silicate and masato as a whole and fine powders such as fine powders and sand grains. However, when used for the lower layer 37, fine powders are preferably used. It is preferable to use a relatively thick material such as a grain of sand.

Glass fibers can be used in various ways such as glass fibers # 300, # 380, and # 450, and glass fibers (including long fibers) cut into glass fibers or glass fibers, FRP regeneration Powdered ground powder and Grasfiba regenerated powder can be used, and the thickness is unlimited, but usually it is inserted at about 2 to 3.4 mm.

FIG. 7 is a perspective view showing a part of the floor material of the present invention, FIG. 8 is a bottom perspective view showing a part of the floor material of the present invention, and FIG. 9 is a partially enlarged sectional view of the floor material of the present invention.

The bottom layer 30 is exposed to the outside by the unevenness of the bottom and the debris located on the flat portion 22 when the upper layer 35 is actually molded in the mold 20, ) Can be formed to prevent slippage. When the entire surface is formed into the flat surface 32 without the concavities and convexities 31, it can be used as a flooring material, a wall, or a decorative product in a room.

A portion of the lower layer 37 exposed to the upper side of the mold 20 is a bottom 33, which is located on the bottom surface when constructed.

The lower layer 37 is formed by joining the bottom molding lid 40 to the side wall 23 on the upper side of the mold 20 and through the protruding portion 42 molded to the bottom of the bottom design molding die 41, 37a are formed.

The forming groove 37a is formed into a groove, and it is possible to form various designs so as to appear outside by the concavo-convex form.

The present invention having such a structure will be described in more detail with reference to the block diagram of FIG. 10.

First, at least one powder selected from among calcium carbonate (stone), silica, masato, calcite, beryllium, limestone, chalk, gypsum and shell shell and powder obtained by pulverizing fiber grains and liquid synthetic resin I will prepare.

Next, 35 to 70 parts by weight of at least one of calcium carbonate (stone), silica sand, margarine, calcite, beryllium, limestone, chalk, gypsum and shell clay is mixed in a composite material mixing step (S20) And a composite material composed of 28 to 60 parts by weight of a synthetic resin is fed to a blender and mixed.

Next, the composite material is supplied to the mixing and melting furnace in a composite material melting supply step (S30), 0.2-3 parts by weight of a coloring matter and 0.2-3 parts by weight of a curing agent are supplied to the mixing and melting furnace with respect to 100 parts by weight of the composite material, And the mold 20 is supplied in a range of 3 to 15 on the molding support 11 of the vibrator 10 to fix the mold 20 so that the mold 20 does not move, And a mold release agent is coated inside the mold 20.

Next, power is supplied to the motors 16 and 16a in the upper layer forming step S40 so that the motor shafts 17 and 17a are rotated to rotate the rotors 18 and 18a by the eccentric engagement of the rotors 18 and 18a, And the vibration is provided at a predetermined distance from the pedestal 13 through the lower spring 12.

In the process of providing the vibration through the vibrator 10, the composite material is supplied with vibration for 250 to 350 seconds so that the upper layer 35 has a thickness of 5 to 7 mm on the recessed portion 21 of the metal mold 20 So that an upper layer 35 having a constant thickness is formed.

Next, by performing the intermediate layer forming step (S50), the glass fiber mat 38 is supplied to the upper side of the upper layer 35 so as to have a thickness of 1 to 3 mm, and the mesh 39 is formed on the glass fiber mat 38, And the iron core 39a are supplied to provide the vibration for 250 to 350 seconds so that the intermediate layer 36 having a constant thickness can be formed.

Next, a lower layer forming step (S60) is performed to form a lower layer (37) by supplying a composite material from the mixing and melting furnace to the upper side of the intermediate layer (36), and vibration is applied for 250 to 350 seconds, And the height of the sidewalls 23.

It is possible to connect the floor design forming stand 41 to the mold so that the floor design forming stand 41 is positioned above the side wall 23 after the composite material is supplied before the lower layer 37 is formed.

Next, the heat treatment step (S70) is performed to mold the lower layer (37), and then the metal mold (20) is supplied to the conveyor and is formed by a heat treatment for 45 to 75 seconds in a heating furnace heated to 30 to 80 deg. .

Next, in the demolding step (S80), the metal mold 20 discharged from the heating furnace is naturally cooled for 120 to 500 seconds, and then the metal mold 20 is turned upside down so that the molding of the flooring 30 Is completed.

[Table 1] shows the result of testing the flooring material (30) formed through these steps through the KS F 3230: 2013 test method to the Korea Institute of Construction & Environment Test.

 Bottom material test report Test Items unit Test result standard Remarks Flammability - Carbonization length cm 8 20 or less satisfied Flame retardant - remaining flame s One Less than 10 seconds satisfied importance - 1,406 0.8 to 1.5 satisfied Flexural maximum load N 6,103 More than 3,000 Stiffness improvement Distortion % 1.2 2.0 or less Keep molding Screw retention N 1,158 400 or more Strong bonding force Skid resistance (C.S.R.) - 0.55 0.40 or more Anti-slip Water absorption rate (weight change) % 0.1 8.0 or less Almost none Impact strength KJ / ㎡ 50.4 3.0 or higher 16 times or more

※ Distance between supports: 300mm

Since the bottom material 30 is formed by mixing the granules of calcium carbonate, silica sand, and margarine with synthetic resin, the flame retardancy is imparted, the maximum flexural load is increased to improve the rigidity, At the same time, there is almost no change in weight due to the water absorption rate, and the impact strength is greatly improved as compared with that of a general deck. Therefore, even when a temperature change such as summer or winter is severe, expansion and contraction do not occur, Since the screw can be directly fixed to the frame of the floor after the hole is formed, it is possible to provide the effect that the holding force of the screw is strong and it is not separated or deformed even if a long period of time passes.

The present invention relates to a process for producing a granulated product by mixing powder of at least one of calcium carbonate (stone), silica sand, margarine, calcite, beryllium, limestone, chalk, gypsum and shell shell, powder obtained by pulverizing fiberglass, And the bottom layer having a predetermined thickness is formed through the vibration of the vibrator by feeding any one of them to the intermediate layer, thereby providing a very useful invention for greatly improving the tensile strength, flame retardancy and impact strength.

10: Vibrator 11: Molding pedestal
12: spring 13: pedestal
14: Column 15: Auxiliary column
16, 16a: motors 17, 17a: motor shaft
18, 18a: Rotor 19: Mold holder
20: mold 21: concave /
22: plane portion 23: side wall
30: Flooring material 31: concave and convex
32: plane 33: bottom
35: upper layer 36: middle layer
37: lower layer 37a: molding groove
38: Grass Fiber Mat 39: Mesh
39a: iron core 40: bottom molding cover
41: floor design molding stand 42: projection

Claims (2)

delete (S10) a preparation step (S10) of preparing a powder or a liquid synthetic resin having powder of at least one of calcium carbonate, silica sand, margarine, calcite, beryllite, limestone, chalk, gypsum and clamshells and fiber grains; A composite material comprising 35 to 70 parts by weight of a powder of any one or more of calcium carbonate, silica, masato, calcite, beryllium, limestone, chalk, gypsum and clamshells and 28 to 60 parts by weight of a synthetic resin is fed to a mixer (S20); (S30) for supplying 0.2 to 3 parts by weight of a coloring material and 0.2 to 3 parts by weight of a curing agent to a molten state by stirring, with respect to 100 parts by weight of the composite material after the composite material is supplied to the mixing and melting furnace; An upper layer forming step (S40) of forming an upper layer having a constant thickness by vibrating the vibrator; An intermediate layer forming step (S50) of supplying an upper side of the upper layer with a mesh or an iron core to the upper side of the fiberglass mat to form an intermediate layer having a constant thickness by vibrating the vibrator; And a lower layer forming step (S60) of supplying a raw material prepared above the intermediate layer to a mold to form a lower layer having a constant thickness by vibrating the vibrator, the method comprising:
In the composite material mixing step (S20), 35 to 70 parts by weight of powder are mixed with 2 to 8 parts by weight of powdered glass powder and 28 to 60 parts by weight of synthetic resin,
In the composite material melt supply step S30, the mold 20 is supplied in a range of 3 to 15 on the molding support 11 of the vibrator 10 so that the mold holding table 19 is fixed to the mold 20 A mold release agent is coated inside the mold 20,
A heat treatment step (S70) of forming the lower layer (37), supplying the metal mold (20) to a conveyor and forming the metal mold (20) by heat treatment in a heating furnace heated at 30 to 80 캜 for 45 to 75 seconds; Further comprising the step of applying the composite material.

Images