JP3553472B2 - Manufacturing method of acrylic artificial marble - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing an artificial marble having a wave pattern or a wood grain pattern, and more specifically, to a new pattern not present in a conventional artificial marble in addition to the shape and pattern of an existing acrylic artificial marble. The present invention relates to a method of manufacturing an acrylic artificial marble having a wave pattern or a wood grain pattern that can diversify the form and color of the acrylic artificial marble by adding (wave and wood grain pattern).
[0002]
[Prior art]
2. Description of the Related Art In general, a conventional method of manufacturing an acrylic artificial marble includes aluminum hydroxide or calcium hydroxide in a syrup obtained by mixing a monomer such as methyl methacrylate and a polymer thereof. After mixing a filler such as described above into a base paste, a pigment, a curing agent and other additives are mixed, and the mixture is injected into a mold and cured. Here, as the other additives, an initiator, a release agent, a dispersant, and the like are used. In addition, pigments and chips are used to change the hue and shape. The pigments used are typically zinc oxide white, iron oxide black, and the like, but pigments of various colors are also used. The chip is manufactured using a raw material whose main component is the same as or different from that of artificial marble, and has various hues and particle sizes (about 0.01 to 10 mm). The pigments and chips are used alone or after being mixed, and the amount used at this time is generally 0.1 to 25 wt% (weight percent concentration) based on the total weight.
[0003]
In addition to the above method, U.S. Pat. No. 5,837,175 discloses a resin having two or more hues (a main component having a composition similar to the artificial marble) as shown in FIG. Are laminated in a mold so as to form sections of layers, and the blade 4 is inserted into the lamination using a comb-shaped tool 1 and moved to form a striped pattern. Is disclosed. In Japanese Patent Application Laid-Open Nos. 10-323848 and 11-277552, one or more layers of liquid resin of another color are laminated on a liquid resin in which a colorant is unevenly dispersed, and a comb-shaped blade is used. There is disclosed a method of manufacturing artificial marble in which the size and spacing of blades are changed to give a natural marble texture. Furthermore, Japanese Patent Application Laid-Open No. H11-291267 discloses a method for producing artificial marble in which a liquid resin containing a colorant is spread to give a natural texture using a comb-shaped tool provided with forming means. Have been. Japanese Patent Application Laid-Open No. 11-291268 discloses a movable molding cell, a liquid resin supply means, and a comb-shaped tool, wherein the liquid supply means has a plurality of resin outlets and a non-stirring mixture for mixing the liquid resin with a colorant. An apparatus for producing artificial marble continuously on an industrial scale in a direction perpendicular to the direction of cell movement, comprising a mold mixer, is disclosed.
[0004]
[Problems to be solved by the invention]
However, the method and apparatus can form a stripe pattern to give a marble to the artificial marble, but the pattern is irregular and poor in reproducibility, and the manufactured artificial marble has a different material and pattern. In addition to a non-uniform product, the change in the pattern is formed only by the size and the interval of the comb-shaped blade, so that the change is poor, and there is a problem that various patterns cannot be expressed.
[0005]
In general, artificial marble produced from acrylic resin has the advantage that it has a relatively beautiful appearance and excellent workability, is lighter and easier to handle than natural marble, and has a kitchen upper plate, a bathtub, various counters and It is used for various purposes such as interior materials. However, compared with natural marble, acrylic artificial marble products manufactured by the generally known conventional method cannot sufficiently express various patterns, hues, and shapes, and are limited in design creation. Had occurred. In particular, when designing a material that represents the hue and pattern of wood, which is often used in a wide variety of articles, in combination with an existing acrylic artificial marble, it may be difficult to achieve harmony in the hue and pattern.
[0006]
The present invention has been made to solve the above problems of the conventional method for producing artificial marble, and in the production process of artificial marble, a liquid resin having at least two hues and a viscosity is formed into a single resin outlet. Fully express various patterns, hues, and shapes by providing a rotating body capable of forming various patterns inside the resin while partially mixing and continuously supplying by the liquid resin supply means having Is possible. In particular, when designing with a combination of materials that represent the hue and pattern of wood and artificial marble, which are often used in a wide variety of articles, new patterns and hues (waves and wood patterns) can be added to the acrylic system. It is an object of the present invention to provide a method of manufacturing an acrylic artificial marble having a wave pattern or a wood grain pattern, which diversifies the form such as the pattern and hue of the artificial marble and facilitates harmonizing the design.
[0007]
[Means for Solving the Problems]
A method for producing an acrylic artificial marble according to the present invention for achieving the above object, the method for producing an acrylic artificial marble has at least two or more liquid resin supply ports and a single liquid resin discharge port. A liquid resin having at least two hues and viscosities is partially mixed through an injection hose swinging left and right and supplied to a movable molding belt, and the partially mixed liquid that moves together with the movement of the molding belt; A rotating body provided with one or more blades in the longitudinal direction of the rotating shaft is located at the center of the resin , and the free end of the blade is lower when the blade passes below the rotating shaft. with proximity to the bottom surface of the liquid resin, the free end of the blade is disposed so as to be located on the upper liquid resin when the blade passes through the upper rotary shaft, before By rotating the rotary member in a clockwise or counterclockwise direction, in which the formation of wave or grain pattern.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described more specifically with reference to the accompanying drawings.
[0009]
The acrylic artificial marble according to the present invention is a syrup comprising a mixture of a monomer such as methyl methacrylate and a polymer thereof in an amount of 10 to 40 wt% (weight percent concentration) based on the total composition weight (the polymer is 10 to 30 wt% based on the syrup weight). % (Weight percent concentration)), 40-70 wt% (weight percent concentration) filler such as aluminum hydroxide or calcium hydroxide, 0.5-5 wt% (weight percent concentration) crosslinker (e.g., ethylene glycol Dimethacrylate, t-ethylene glycol dimethacrylate, di-ethylene glycol dimethacrylate, etc., 0.5 to 5 wt% (weight percent concentration) of a curing agent (for example, t-butylperoxymaleic acid, benzoyl peroxide, t-butyl) Hydroperoxide, acetylpe Oxide, etc.), toner (Toner) (e.g., 0.1-10% (weight percent concentration), zinc oxide white, etc. Iron oxide black), and is a composition from other additives which are generally known.
[0010]
In general, a method for producing an acrylic artificial marble using the same composition as the above-mentioned components is as follows. First, two or more kinds of mixtures in which pigments having different hues are added to the above-mentioned components are prepared, and each is mixed in a mixing vessel. Things. At this time, the viscosity of each mixture is 1,000 to 60,000 cps (1 to 60 Pa · s), and each viscosity can be adjusted by the mixing ratio of the polymer mixed in the syrup. It can also be adjusted using additives.
[0011]
FIG. 2 is a schematic view showing an embodiment of the artificial marble according to the present invention.
[0012]
In the present embodiment, the mixtures A and B having different hues and viscosities are supplied to the dam 13 through the first supply port 17 and the second supply port 18, respectively. At this time, the mixture A is poured from the mixing vessel 11 into the injection hose 12 through the hose connector 15, and the mixture B is supplied through the hose 12, and is partially mixed with the mixture A near the hose connector 15. 13 is discharged. Here, the hose has a predetermined inner diameter (10 to 100 mm) and a length, and the respective mixtures are injected to partially mix the two or more types of mixtures in the vicinity of the hose connecting portion 15 first. The hose 12 swings left and right by a swing device. Due to such a swing operation, the mixture of the mixture A and the mixture B is poured in a wavy manner over a wide area. The hose 12 is made of a material that does not dissolve in the mixture, and is made of polyethylene (PE) or PVC series products.
[0013]
According to the present invention, the amount of the mixture A is preferably 10 to 80% by weight (weight percent concentration) of the mixture B, and in order to improve the marble feeling of the artificial marble, one of the mixture A or the mixture B, or the mixture A and B , A proper amount of artificial marble chips having a hue different from the hue of the mixture A and the mixture B can also be mixed. The artificial marble chip can use any form of chip that can be manufactured by those skilled in the art.
[0014]
The molding method according to the present invention is a continuous casting molding method, in which a drive belt (for example, SUS can be used as a material) 14, a gasket on both sides for injecting a mixture into the upper part of the belt ( For example, rubber can be used as the material) and the dam 13, and the artificial marble 16 is formed by curing the partially mixed liquid resin 22 while moving it by driving the belt.
[0015]
Here, on the circumferential surface of the rotating body 21 used in the manufacturing method of the present invention, blades 24 are randomly provided in a state of being spaced apart in the longitudinal direction of the rotating shaft, and are connected to the dam 13 on the upper part of the forming belt. It is provided. The rotating body 21 can be rotated clockwise or counterclockwise by power transmission means (not shown). The blades 24 of the rotating body 21 may have a rectangular shape, a triangular shape, a circular shape, an elliptical shape, or a mixed form thereof, and the number of blades is 1 to 20, and if necessary, depending on a desired shape of a product. The above is also possible. In the case of a rectangular shape, a blade used for forming a wood grain pattern is mainly one having a width of 5 to 500 mm and a length of 5 to 500 mm, and other shapes (oval, triangle, etc.) may be used depending on the shape of the pattern. it can. However, when the width of the blade exceeds 500 mm, the two kinds of mixtures are almost completely mixed, so that the pattern does not tend to appear. The rotating body is installed at an intermediate position with respect to the height of the mixture, for example, 5 to 20 mm. It is appropriate that some of the blades of the rotating body are close to the belt surface and the other part is located at the top of the mixture. There is . That is, when the blade passes below the rotation axis, the free end of the blade approaches the bottom surface of the lower liquid resin, and when the blade passes above the rotation axis, the free end of the blade forms the upper liquid resin. It is good to install it so that it may be located on the upper part of the table (see FIG. 3).
[0016]
According to the present invention, the mixture that has passed through the injection hose is injected into the front of the rotating body 21, and when the height of the mixture reaches a certain height, the rotating body is rotated clockwise or counterclockwise simultaneously with driving of the belt 14. Let it. At this time, the rotation speed of the rotating body is preferably 5 to 100 times / minute. When the rotation speed is less than 5 times / minute, the pattern appears locally, and when the rotation speed is more than 100 times / minute, the two types of mixtures are completely mixed, so that the pattern does not tend to appear. The mixture injected into the mold in a state where two or more hues are partially mixed is subjected to secondary mixing by rotation of the blade 24 of the rotating body 21. As described above, the mixture of the different hues is partially mixed in the upper or lower part by the blade 24 of the rotating body 21 and then hardened, and in the hardened artificial marble, the different hues are partially mixed. Hue differences occur, which makes it possible to produce artificial marble having a wave or grain pattern 23.
[0017]
Hereinafter, in order to more specifically describe the present invention, a manufacturing test performed by the inventor will be described. The technical scope of the present invention is not limited to the following test contents.
[0018]
Test Example 35% by weight (weight percent concentration) of a polymer mixture syrup composed of 80% methyl methacrylate and 20% polymethyl methacrylate, 55% by weight aluminum hydroxide (weight percent concentration), 1% by weight ethylene glycol dimethacrylate (weight) Percent A), 1% by weight of t-butylperoxymaleic acid (weight percent) and 8% by weight of zinc oxide white (weight percent), 70% methyl methacrylate and 30% polymethyl 35% by weight (weight percent concentration) of a polymer mixture syrup composed of methacrylate; 55% by weight of aluminum hydroxide (weight percent concentration); 1% by weight of ethylene glycol dimethacrylate (weight percent concentration); Oxy maleic acid 1 wt% (weight percent concentration), and were prepared zinc oxide yellow 8 wt% by mixing the (weight percent concentration) mixture B. The two mixtures were each injected into the apparatus of FIG. 2 so that the height of the mixture of A and B on the movable molding belt was 150 mm. The blades (five) had a length of 70 mm and widths of 30 mm, 50 mm, 70 mm, 50 mm and 30 mm, respectively, and were injected in front of the rotating body. At the same time as the belt was driven, the rotating body was rotated clockwise at 50 times per minute to produce artificial marble. As a result, an artificial marble having a beautiful grain pattern and a wave pattern could be produced.
[0019]
【The invention's effect】
As described above, the present invention enables the manufacture of artificial marble having a wave and a grain pattern, instead of a simple stripe pattern, and diversifies the pattern and hue of the product. Particularly when used in combination with wood-based materials, it is easy to achieve harmony in design, and the use and application range can be diversified.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a manufacturing process for forming a stripe pattern on artificial marble using a conventional comb-shaped tool.
FIG. 2 is a schematic view showing a process for producing artificial marble according to the present invention.
FIG. 3 is a schematic view showing a process of manufacturing artificial marble using the rotating body according to the present invention.
[Explanation of symbols]
1 Comb tool 2 Upper liquid resin (white)
3 lower liquid resin (black)
Reference Signs List 4 Blade 11 Mixture container 12 Injection hose 13 Dam 14 Movable forming belt 15 Hose connector 16 Artificial marble 17 First supply port 18 Second supply port 21 Rotating body 22 Partially mixed liquid resin 23 Wave pattern or grain pattern 24 Rotating body blade

Claims (7)

In the method of producing an acrylic artificial marble, a liquid resin having at least two or more liquid resin supply ports and a single liquid resin discharge port, and a liquid resin having at least two hues and viscosities through an injection hose swinging left and right. One or a plurality of blades are provided in the longitudinal direction of the rotating shaft in the center of the inside of the partially mixed liquid resin which is mixed and supplied to the movable molding belt, and moves together with the movement of the molding belt. When the blade passes below the rotating shaft, the free end of the blade approaches the bottom surface of the lower liquid resin , and the blade passes above the rotating shaft. by free end of the blade is disposed so as to be located on the upper liquid resin, thereby rotating the rotary member in a clockwise or counterclockwise direction, wave or wood Acrylic artificial marble manufacturing method, characterized in that to form a pattern. The method for producing an acrylic artificial marble according to claim 1, wherein the rotation speed of the rotating body is 5 to 100 times / minute. The method according to claim 1 , wherein when a plurality of blades of the rotating body are provided, each blade is provided at a different position in a circumferential direction of a rotation shaft. The method of claim 1, wherein a shape of the blade of the rotating body is rectangular, triangular, circular, oval, or a mixture thereof. The method for producing an acrylic artificial marble according to claim 4, wherein when the blade of the rotating body is rectangular, the shape thereof is 5 to 500 mm in width and 5 to 500 mm in length. The method for producing acrylic artificial marble according to claim 1, wherein the number of blades of the rotating body is 1 to 20. The method according to claim 1, wherein artificial marble chips are added to each or both of the liquid resins having at least two colors and viscosities.

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