JP2003062840A - Method for producing artificial marble - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing artificial marble which can obtain an artificial marble product always having a uniform onix-tone pattern, being high in designability, or having a high grade feel in high productivity. SOLUTION: In the method for producing the artificial marble, the artificial marble is obtained by obtaining resin compositions in which additives such as a filler, an internal mold release agent, and a curing agent are incorporated in a thermosetting resin, injecting the compositions in a prescribed casting mold, and molding and curing the compositions. The mold is slanted with an angle formed in the width direction of the mold, and the compositions having different color tones are injected in turn into the mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing artificial marble used as a furniture member or a building material.

[0002]

2. Description of the Related Art Conventionally, a thermosetting resin and a resin composition containing additives such as a filler, a reinforcing material, an internal release agent and a curing agent are poured into a desired casting mold and heated. It is known to form artificial marble by hardening.
As a thermosetting resin which is a raw material for producing artificial marble, polyester resins, vinyl ester resins, acrylic resins and the like have been conventionally used. Artificial marble moldings that make use of these are widely used in bathroom counters, kitchen counters, bathtubs, and washbasins.

Usually, an onyx-like pattern called a flow pattern is formed on an artificial marble for its high design and design. This is to put resin compositions of different colors in a container, apply a pattern of onyx tone while hanging it on the casting mold surface by hand and cure it to a semi-cured state, and then further cast resin composition Is mixed with the patterned layer and completely cured to obtain an onyx-like artificial marble molded product.

[0004]

However, the above-mentioned method is a method of manually curing at room temperature or by heating at 40 to 50 ° C., which requires a long time for curing and is extremely poor in production efficiency. It was a thing. In addition, since the patterning is done by hand and the curing conditions are close to room temperature curing, it is difficult to obtain molding conditions that are fairly constant due to temperature fluctuations and seasons, and therefore there is no uniformity of the onyx pattern obtained. At that time, the pattern tended to be different at that time. Therefore, there was an urgent need for the emergence of a method that is highly efficient in production and can always express a uniform onyx pattern.

The present invention has been made in view of the above points, in which a casting mold is inclined in the width direction or the longitudinal direction and resin compositions having different color tones are sequentially injected to perform curing and molding. It is an object of the present invention to provide a method for producing an artificial marble, which is capable of producing an artificial marble product having a high design efficiency and a high-quality feeling that has a uniform onyx pattern pattern with high production efficiency. It is a thing.

[0006]

In order to solve the above-mentioned problems, the method for producing an artificial marble according to claim 1 of the present invention comprises a thermosetting resin, a filler and an additive such as an internal release agent and a hardening agent. In a method for producing an artificial marble obtained by injecting the resin composition into a predetermined casting mold and molding and curing the resin composition, the angle is set in the width direction of the casting mold. The resin composition having different color tones is sequentially injected. As described above, the casting mold is inclined in the width direction, and resin compositions having different color tones are sequentially injected into the casting mold to mold and cure, and a design or design having an onyx-like pattern It is possible to obtain a high-quality artificial marble product. At this time, when the resin composition is sequentially poured into the casting mold and cured for molding, it can be heated to a high temperature. It does not change), and it can be cured in a short time with good production efficiency. Further, since the resin composition having different color tones is sequentially injected by changing the inclination of the casting mold, a uniform pattern pattern can be always formed.

Further, the method for manufacturing an artificial marble according to a second aspect of the present invention is characterized in that, in the first aspect, the casting die is also inclined in the longitudinal direction to change its angle. is there. In this case, it is possible to obtain a high-quality artificial marble product having high designability and design by further changing the casting mold by inclining it in the longitudinal direction in addition to the width direction.

The method of manufacturing artificial marble according to claim 3 of the present invention is characterized in that, in claim 1 or 2, the inclination of the casting mold is ± 2 ° to ± 90 °. To do.

The method for producing artificial marble according to a fourth aspect of the present invention is the method according to the first aspect, wherein the thermosetting resin constituting the resin composition is a polyester resin, a vinyl ester resin, an acrylic resin, or two types thereof. It is characterized by comprising the above-mentioned mixed system.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The present invention is a thermosetting resin with a filler and an internal release agent,
In a method for producing an artificial marble obtained by obtaining a resin composition containing additives such as a curing agent, injecting the resin composition into a predetermined casting mold and curing the mixture, a casting mold The resin composition having different color tones is sequentially injected to obtain an onyx pattern with a flow pattern.

The form is shown in FIGS. 1, 2, 3, 4, and 5.
Described in. FIG. 1 shows a casting die, which is composed of an upper die 1, a lower die 2 and a gasket 3. The gasket 3 functions as a liquid stopper for stopping the injected resin composition, has a thickness (height) corresponding to the thickness of the molded product and rubber hardness, and is fixed to the lower mold 2. The X direction of the casting mold is the width direction and the Y direction is the longitudinal direction. 4-1
Reference numeral 1 is an injection port for injecting and filling the resin composition into the casting mold. In the present invention, since the injection operation is performed by changing the angle of the casting mold variously, it is possible to appropriately select and inject from the corresponding injection ports 4 to 11.

FIG. 2 shows a state in which the casting mold of FIG. 1 is tilted in the width direction (angle θ ₁ ) and resin compositions having different color tones are successively injected (the longitudinal angle is the same). that way). FIG. 2A shows a mode in which the casting mold is inclined, and FIG. 2B is a perspective view of the state at the time of injection. From the injection port, the resin composition with different color tone is applied to 12, 13, 14, 15, 16, 17, 18,
It is injected in the order of 19 and 20, molded and cured, and taken out from the casting mold to obtain a molded product as shown in FIG. 2 (c). Molding in this way gives a pattern expression in which the pattern flows in the longitudinal direction.

The injection of the resin composition is carried out in a state where the casting mold is heated to an appropriate temperature, and when the injected resin composition is in a semi-cured state and the fluidity is lowered, It is desirable to inject the resin composition. When the resin composition is injected in this state, a part of the resin composition is mixed at the interface in a bokeh shape to give a natural pattern expression. If the next resin composition is injected immediately after the injection, the resin compositions are mixed with each other and the desired pattern cannot be obtained. Further, the next resin composition may be injected after the injected resin composition is completely cured, but the pattern division tends to be too complete, and the pattern expression tends to have no natural appearance. The width of the appearing pattern is determined by the injection amount of the resin composition to be injected. It is also possible to change the angle θ ₁ for each injection to change the width of the pattern.

FIG. 3 shows a state in which the casting mold of FIG. 1 is tilted in the longitudinal direction (angle θ ₂ ), and resin compositions having different color tones are successively injected (the angle in the width direction is that way). FIG. 3A shows a state where the casting mold is inclined, and FIG. 3B is a perspective view of the situation at the time of injection. From the injection port, resin compositions of different colors 21, 21, 22, 23, 24, 25, 26, 27,
It is injected in the order of 28, molded and hardened, and taken out from the casting mold to obtain the molded product of FIG. 3 (c).
As a result, a pattern expression in which the pattern flows in the width direction is obtained.

FIG. 4 shows a state in which the casting mold of FIG. 1 is tilted in both the width direction and the longitudinal direction (angles θ ₃ and θ ₄ ) and resin compositions having different color tones are sequentially injected. . Figure 4
(A) shows a state where the casting mold is tilted, and (b) of FIG. 4 is a perspective view of the situation at the time of injection. 2 different resin compositions with different colors from the inlet
Inject in the order of 9, 30, 31, 32, 33, 34, 35, 36 to cure and mold, and remove from the casting mold,
The molded product of FIG. 4 (c) is obtained. As a result, a pattern expression in which a pattern having a certain angle in the longitudinal direction flows can be obtained.

In FIG. 5, the casting mold of FIG. 1 is tilted in both the width direction and the longitudinal direction (angles θ ₆ and θ ₇ ), and resin compositions having different color tones are sequentially injected. At that time, the resin composition is injected. The figure shows a case where the operation of repeating the operation of changing the angle for each injection and repeating the injection is repeated. FIG. 5 (a)
Shows a state in which the mold is inclined, and FIG. 5 (b) is a perspective view of the situation at the time of injection. 37, 38, 39, 40, 41, 42, 43, while changing the casting mold angles (θ ₅ , θ ₆ ) in the width direction and the longitudinal direction each time a resin composition having a different color tone is injected from the inlet. 44
In this order, the mixture is injected and molded and cured, and taken out from the casting mold to obtain a molded product as shown in FIG. 5 (c). As a result, it is possible to obtain a pattern expression in which a pattern having an angle in the longitudinal direction flows from the left and right directions.

In the present invention, as shown in FIGS. 1 to 5, various shapes can be obtained by injecting resin compositions having different color tones and molding and curing while keeping the casting mold at a certain angle. The flow pattern can be created. The setting of the angle at the time of injection is appropriately set depending on how the desired pattern is expressed. In the present invention, the range (θ _{1 to} θ ₆ ) is set to ± 2 ° to ± 90 °. . This is because when the inclination angle is ± 2 ° or less, the flow pattern layer overlaps with the following resin composition and it becomes difficult to express the flow pattern on the surface of the molded product.

Next, the resin composition of the present invention having different color tones will be described. The thermosetting resin constituting the resin composition is composed of a polyester resin, a vinyl ester resin, an acrylic resin alone or in a mixture of two or more kinds. The following are fillers, handle materials, internal release agents, curing agents. Additives such as are compounded and used. The polyester resin is a thermosetting resin, which is synthesized by subjecting an unsaturated dibasic acid such as maleic anhydride and a saturated dibasic acid such as phthalic anhydride to a condensation reaction with glycols, and is unsaturated in the molecule. It has a bond and an ester bond. Usually, this resin contains styrene monomer as a cross-linking agent,
A so-called unsaturated polyester resin containing an acrylic monomer is used, but the form is not particularly limited. As the vinyl ester resin, a bisphenol type vinyl ester resin, a novolac type vinyl ester resin, or a mixture of both can be used.

Here, the bisphenol type vinyl ester resin is an addition reaction product of a bisphenol type epoxy resin and an acid, and each has a reactive unsaturated group only at both ends. Further, as the bisphenol type epoxy resin, bisphenol A type, bisphenol AD
Type, bisphenol S type, bisphenol F type and the like can be used. Usually, the vinyl ester resin is blended with a styrene monomer, an acrylic monomer or the like as a cross-linking agent, but the form is not particularly limited.

As the acrylic resin, what is called a thermosetting type acrylic syrup composed of a mixture of two or more kinds of a methyl methacrylate monomer, a polyfunctional acrylic monomer, a prepolymer or a polymer is usually used. The form is not particularly limited.

When a mixture of two or more kinds of polyester resin, vinyl ester resin and acrylic resin is used, the characteristics of each resin and the interaction with the filler, the interaction with the resin compound to be added and the like, etc. Therefore, the optimum compounding that matches the desired product quality is required.
The blending amount is not particularly limited.

The filler is aluminum hydroxide, silica,
It can be used as one kind of glass powder or a mixture of two or more kinds. The compounding amount of the filler is 100 to 300 with respect to 100 parts by weight of the thermosetting resin.
It is preferable to use parts by weight, and if it is less than this range,
Although the molded article has excellent impact resistance, it may not be able to exhibit sufficient heat resistance. If it exceeds this range, the heat resistance may be excellent but the impact resistance may decrease.

The smaller the particle size of the filler, the more the impact strength of the artificial marble can be improved, but the blending amount tends to make the viscosity of the artificial marble resin composition sharply increase and make the production difficult. It is desirable to select it appropriately together with. On the other hand, when the particle size of the filler becomes large, the viscosity of the artificial marble resin composition decreases and the problem in production disappears, but since the impact resistance of the artificial marble product tends to decrease, this is also compounded. It is desirable to select the appropriate amount according to the amount. However, this is not particularly limited.

Further, if a filler having a surface subjected to silane coupling treatment in advance is used, the adhesiveness between the filler and the resin can be improved and the impact resistance of the artificial marble product can be improved. .

The resin composition having different color tones can be obtained by a composition in which various colorants (toners) are further added and blended.
Further, in order to express higher designability, various pattern materials having different color tones, or a phosphorescent agent or a fluorescent agent may be added and blended.

The size and amount of the pattern material are not particularly limited, and the surface is treated with a silane coupling agent or the like for the purpose of improving the adhesion with the resin composition to which the pattern material is further added and blended. It can also be used after treatment.

Further, a curing agent is added to the resin composition.
As the curing agent, 1,1,3,3-tetramethylbutylperoxy 2-ethylhexanoate or t-hexylperoxy 2-ethylhexanoate can be used. For example, in the case of a vinyl ester resin, the mixing ratio of the curing agent is preferably 0.5 to 5 parts by weight based on 100 parts by weight of the total amount of the resin and the crosslinking agent.

Further, the compound can be blended with an ultraviolet absorber, a viscosity reducing agent, a release agent, and glass fiber. As the viscosity reducing agent, for example, "W996" manufactured by BYK, and as the release agent, for example, trade name "Cepar" manufactured by Chukyo Yushi Co., Ltd.
As the glass fiber, for example, a product number “R” manufactured by Nippon Sheet Glass Co., Ltd.
ES03X-BM "can be used. Further, as the ultraviolet absorber, those of benzotriazole type, triazine type, benzoate type, salylate type, cyanoacrylate type, oxalic acid anilide type, benzophenone type, etc. can be used. The resin composition is blended with these blends at a predetermined ratio, the handle material obtained by the same method is added and blended, and the mixture is mixed and stirred by a stirrer or the like to prepare the mixture.

Further, the artificial marble resin composition whose composition has been adjusted is subjected to vacuum defoaming treatment under a reduced pressure of about 20 to 50 Torr. The artificial marble resin compositions with different tones that have been defoamed in this way are released from the reduced pressure state, and are then applied to a predetermined casting mold by the method of FIGS. 2 to 5 while applying appropriate temperature conditions and time. The operation of sequentially injecting is repeated to complete the filling. Further, this mold is heated at a temperature of 50 to 110 ° C. for 3 hours.
The artificial marble resin composition is heated for 0 to 120 minutes to promote a copolymerization reaction between the reactive unsaturated group in the thermosetting resin in the artificial marble resin composition and the polymerizable monomer in the resin. Can be cured and molded.

The artificial marble molded product thus obtained is a product obtained by successively injecting resin compositions having high design characteristics with different color tones while freely manipulating the angle of the casting mold, As a result of the onyx-like flow pattern expression having a certain angle in the vertical direction or the horizontal direction as shown in the state of the obtained molded product of FIGS. Such a molded article of artificial marble can be easily commercialized as a counter material such as a wash counter or a kitchen counter, or a table material, a floor material, a wall material, or the like.

[0031]

EXAMPLES The present invention will be described in more detail below with reference to examples. (Example 1) Polyester resin {Polymer 5250 manufactured by Takeda Pharmaceutical Co., Ltd.} was used as a thermosetting resin, and aluminum hydroxide {H-made by Showa Denko KK) was used as a filler with respect to 100 parts by weight of this resin. 320 Average particle size 10μ
m} was mixed with 180 parts by weight separately, and white (a), red (b), blue (c), black (d) and brown (e) colorants (toners) were added and mixed, Further, a curing agent {Percure HO manufactured by NOF CORPORATION) was added to each of the 3.
0 parts by weight was added, and vacuum defoaming treatment was performed for 60 minutes under a reduced pressure of 20 Torr to obtain five resin compositions {(a) to (e)} having different color tones.

On the other hand, the casting mold shown in FIG. 1 was used, tilted by + 20 ° in the width direction and heated to 40 ° C. as shown in FIG. The prepared resin compositions having different color tones were sequentially injected into the set casting molds at intervals of 5 minutes. After the injection is completed, the casting mold is heated to 90 ° C. and heated for 60 minutes to be cured.
12 = (a), 13 = (b), 14 = (a), 15 =
(C), 16 = (a), 17 = (d), 18 = (a),
FIG. 2C having a configuration of 19 = (e) and 20 = (a).
A molded product of was obtained. (Example 2) As a thermosetting resin, a vinyl ester resin {Prominate P-311 manufactured by Takeda Pharmaceutical Co., Ltd.} was used,
With respect to 100 parts by weight of this resin, 100 parts by weight of aluminum hydroxide {H-308B, manufactured by Showa Denko KK, 8 μm in average particle size} as a filler, and glass powder {GF-2-, manufactured by Nippon Frit Co., Ltd. 30A average particle size 30 μm}
50 parts by weight are added, and a phosphorescent agent {Nemoto Special Chemical Co., Ltd.
Whitening (f), red (g), black (h), brown (i) and blue (j) colorants (toners) are added separately by mixing 3 parts by weight of phosphorescent agent N luminous luminova}. In addition, a curing agent for each {Percure H manufactured by NOF CORPORATION
O} was added in an amount of 3.0 parts by weight, and the pressure was reduced to 6 at 20 Torr.
Vacuum defoaming treatment was performed for 0 minutes to obtain five resin compositions {(f) to (j)} having different color tones.

On the other hand, the casting mold of FIG. 1 was used, tilted by + 30 ° in the longitudinal direction as shown in FIG. 3, and set at a temperature of 40 ° C. A resin composition having a different adjusted color tone is injected into the set casting mold at intervals of 7 hours.
It was injected sequentially while taking each minute. After the injection is completed, the temperature of the casting die is raised to 90 ° C., and heating is performed for 70 minutes to cure the resin, and 21 = (f), 22 = (g), 23 = (f), 24 in FIG.
= (H), 25 = (f), 26 = (i), 27 =
3 (c) having a configuration of (f) and 28 = (j) was obtained (Example 3) Acrylic syrup resin (AC-02 manufactured by Nippon Fellow Co., Ltd.) as a thermosetting resin. }, Aluminum hydroxide {H-320 manufactured by Showa Denko KK, average particle size 10 μm} as a filler with respect to 100 parts by weight of this resin
And 50 parts by weight of glass powder {Nippon Frit Co., Ltd.
GF-2-30A manufactured by GF-2-30A having an average particle size of 30 μm was mixed in an amount of 100 parts by weight, and further 1.0 parts by weight of a fluorescent agent {fluorescent agent Lumogen F manufactured by BASF Japan Ltd.} was mixed separately to obtain white (k). , Red (1), gray (m),
A brown (n) and beige (o) colorant (toner) is added and mixed, and further, a curing agent is added to each (Kayaku Akzo Co., Ltd.).
20T by adding 1.8 parts by weight of manufactured Perkadox 16}
Vacuum defoaming treatment was performed for 60 minutes under a reduced pressure of orr to obtain five resin compositions {(k) to (o)} having different color tones.

On the other hand, using the casting mold shown in FIG. 1, as shown in FIG. 4, the mold was tilted + 10 ° to the right and further tilted + 25 ° in the longitudinal direction and set at a temperature of 45 ° C. The prepared resin compositions having different color tones were sequentially injected into the set casting molds at intervals of 5 minutes. After the injection is completed, the temperature of the casting mold is raised to 90 ° C.,
Heat for 0 minutes to cure, 29 = (k), 30 = in FIG.
(1), 31 = (k), 32 = (m), 33 = (k),
A molded product of FIG. 4C having a configuration of 34 = (n), 35 = (k), 36 = (o) was obtained. (Example 4) As thermosetting resins, vinyl ester resin {Lipoxy R-804 manufactured by Showa High Polymer Co., Ltd.} and polyester resin {Polymer 5250 manufactured by Takeda Pharmaceutical Co., Ltd.} were used.
Mixing was carried out at a compounding ratio of 0/30, and 180 parts by weight of aluminum hydroxide {H-320 average particle size 10 μm manufactured by Showa Denko KK} was added as a filler to 100 parts by weight of the mixed resin separately. Then, white (p), red (q), gray color (r), brown (s), and page color (t) colorants (toners) are added and blended, and a curing agent {Japan Oil and fat Co., Ltd. Percure HO) 4.
0 parts by weight was added and vacuum defoaming treatment was performed under a reduced pressure of 20 Torr for 60 minutes to obtain five resin compositions {(p) to (t)} having different color tones.

On the other hand, as shown in FIG. 5, the casting mold of FIG. 1 was tilted + 15 ° in the width direction and + 25 ° in the longitudinal direction and heated to 50 ° C. before being set. Into the set casting mold, while the injection time intervals of the prepared resin compositions having different color tones are set at intervals of 5 minutes, the inclination angle in the longitudinal direction of the casting mold is set at each injection. "+ 25 ° →
“−25 ° → + 20 ° → −20 °” was repeatedly injected while changing the temperature. After the injection is completed, the casting die is heated to 90 ° C. and heated for 70 minutes to be cured, which is 37 in FIG.
(P), 38 = (q), 39 = (p), 40 = (r),
41 = (p), 42 = (s), 43 = (p), 44 =
A molded product of FIG. 5C having the structure of (t) was obtained. (Example 5) Vinyl ester resin as thermosetting resin
{Showa High Polymer Co., Ltd. Lipoxy R-804}, acrylic syrup resin {Mitsui Chemicals XE924-1}, and polyester resin {Takeda Yakuhin Co., Ltd. Polymer 5250} at a mixing ratio of 70/15/15. Mix and mix 10
To 0 parts by weight, 100 parts by weight of aluminum hydroxide {H-320 manufactured by Showa Denko KK, 10 μm average particle size} as a filler, and silica {CRYSTALl manufactured by Tatsumori Co., Ltd.
50 parts by weight of TEM-3K average particle size 20 μm} and 4 parts by weight of a phosphorescent agent (a phosphorescent agent N luminous luminova manufactured by Nemoto Special Chemical Co., Ltd.) were mixed separately to obtain white (u), red ( v), a gray color (w), a brown color (x), and a beige color (y) are added and blended, and a curing agent {Percuture W manufactured by NOF CORPORATION)
O} was added in an amount of 4.0 parts by weight to obtain 6 under a reduced pressure of 20 Torr.
Vacuum defoaming treatment was performed for 0 minutes to obtain five types of resin compositions having different color tones {(u) to (y)}.

On the other hand, using the casting mold of FIG. 1, as shown in FIG. 5, the mold was set at + 15 ° in the width direction and + 25 ° in the longitudinal direction and heated to 45 ° C. Into the set casting mold, while injecting the prepared resin compositions having different color tones at intervals of 8 minutes, the inclination angle of the casting mold in the width direction is set for each injection. "+ 15 ° →-
15 ° → + 10 ° → -10 ° ”
Furthermore, the inclination angle in the longitudinal direction is “+ 25 ° → −25 ° → + 2
The injection was performed while repeatedly changing from 0 ° to −20 °. After the injection is completed, the temperature of the casting die is raised to 90 ° C., and the casting die is heated for 70 minutes to be cured, and 37 = (u) in FIG.
38 = (v), 39 = (u), 40 = (w), 41 =
(U), 42 = (x), 43 = (u), 44 = (y),
A molded product having the structure of FIG. 5 (c) was obtained.

[0037]

INDUSTRIAL APPLICABILITY The present invention provides a resin composition in which a thermosetting resin is mixed with a filler, additives such as an internal release agent and a curing agent, and the resin composition is subjected to a predetermined casting mold. In the method of manufacturing artificial marble obtained by injecting into and molding and hardening, the resin composition having different color tones is sequentially injected with an angle in the width direction of the casting mold, so that it has an onyx pattern pattern. It is possible to obtain a high-quality artificial marble product with high design and design, at which time the resin composition is sequentially poured into the casting mold and heated to a high temperature when cured to mold. It can be cured in a short time and has good production efficiency.Also, it is necessary to change the inclination of the casting mold and sequentially inject resin compositions with different color to form a pattern. It is possible to form a uniform pattern.

When the casting die is inclined in the longitudinal direction and its angle is changed, the casting die is inclined in the longitudinal direction other than the width direction to further change the design and It is possible to obtain a high-quality artificial marble product with a high design.

[Brief description of drawings]

FIG. 1 is a perspective view showing a casting mold used in the method of the present invention.

FIG. 2 is an explanatory diagram of an example of a method of manufacturing using the above casting mold.

FIG. 3 is an explanatory view of another example of the above manufacturing method.

FIG. 4 is an explanatory view of another example of the manufacturing method of the above.

FIG. 5 is an explanatory view of another example of the manufacturing method of the above.

[Explanation of symbols]

1 Upper mold 2 Lower mold 3 gasket 4-11 inlet

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B29K 67:00 B29K 67:00 105: 16 105: 16 B29L 9:00 B29L 9:00 31:10 31: 10F term (reference) 4F204 AA21 AA24 AB03 AB11 AF09 AG03 AH44 EA03 EB01 EB22 EB28 EF01 EF27 EK24

Claims (4)

[Claims] 1. A resin composition obtained by mixing a thermosetting resin with an additive such as a filler, an internal release agent, and a curing agent, and injecting the resin composition into a predetermined casting mold. A method for producing an artificial marble obtained by molding and curing, comprising inclining a casting die at an angle in a width direction and sequentially injecting resin compositions having different color tones. 2. The casting mold is also inclined in the longitudinal direction,
The method of manufacturing an artificial marble according to claim 1, wherein the angle is changed. 3. The method for producing an artificial marble according to claim 1, wherein the casting mold has an inclination of ± 2 ° to ± 90 °. 4. The artificial marble according to claim 1, wherein the thermosetting resin constituting the resin composition comprises a polyester resin, a vinyl ester resin, an acrylic resin, or a mixture of two or more kinds. Production method.