JP2001293733A - Method for manufacturing patterned artificial marble - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for economically and easily manufacturing artificial marble having various patterns by efficiently injecting a liquid resin becoming a base material and a patterning liquid resin in a hermetically closed mold and easily adjusting a form of patterns. SOLUTION: The liquid resin for the base material and one kind or plural kinds of patterning liquid resins are respectively injected in a static mixer from different injection ports and allowed to meet with each other by the mixer element of the mixer to form a confluent mixture which is, in turn, injected in the mold and cured to obtain patterned artificial marble. A flow rate adjusting valve is arranged on this side of the injection port of the static mixer to adjust the flow rate of the mixture to develop various patterns.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing patterned artificial marble used for countertops, table tops, bathtubs and the like of washstands.

[0002]

2. Description of the Related Art As a method of manufacturing an artificial marble having a pattern on its surface, for example, a liquid resin for a base material and a liquid resin for patterning are poured into an open mold through a discharge port of a hopper. There is known a method in which the door is closed later and cured by heating or the like.

However, such a method cannot be implemented in an efficient method of directly injecting a liquid resin into a closed mold using a pressure tank or the like under pressure.
It was also very difficult to adjust the form of the pattern.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a liquid resin for a base material and a liquid resin for patterning can be directly injected into a closed mold, and the shape of the pattern can be easily adjusted. The present invention proposes a method for producing a patterned artificial marble that can be used.

[0005]

That is, according to the present invention, a liquid resin serving as a base material of artificial marble and one or more kinds of liquid resins for patterning are injected into static mixers from different injection ports to join them. A method of producing a patterned artificial marble, characterized by injecting the combined fluid of the liquid resin into a molding die and curing it.

In the present invention, a flow rate control valve is provided in front of the injection port of the static mixer to adjust the flow rate of the liquid resin serving as the base material and the liquid resin for patterning, thereby forming the pattern. The form can be changed and adjusted.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in the overall flow chart of FIG. 1, an unsaturated polyester-based or acrylic liquid resin to which a base material of artificial marble is added, for example, a hardener or an inorganic filler such as aluminum hydroxide. 1 and two kinds of unsaturated polyester-based or acrylic-based liquid resins 2, 3 of different colors which are colored by adding, for example, dyes and pigments for patterning, are put into separate pressure tanks 4, 5, 6, respectively. The pressure is injected into the cylindrical static mixer 10 from the injection ports 7 a, 8 a, 9 a through the supply pipes 7, 8, 9 respectively.

The static mixer 10 has a structure as shown in FIG. 2. For example, the supply pipe 7 for the base resin 1 is
Is connected by connecting one end to a tip injection port 7a having the same diameter as the cylindrical body, and supply pipes 8 and 9 for the coloring resin 2, 3 for patterning, which are relatively small in quantity, are connected to the tip injection port. 8a,
9a is inserted into the mixer cylinder 10 so as to direct the liquid in the mixer 10 in the traveling direction.

Each of the above-mentioned tip inlets 7 in the static mixer 10
One or a plurality of mixer elements 11 to 13 are provided detachably in front of a, 8a and 9a.
This mixer element is, for example, shown in FIG.
3 is omitted), two thin circular through holes are formed in the length direction of each cylindrical element,
In the center of each through hole, partitions 11a, 12a formed so as to be twisted by 180 ° from each other from the entrance to the exit.
And a total of four twisted flow paths 11b or 12b are formed in each element.

As a result, the liquid resins 1 to 3 that have entered the torsional flow path 11b of the first element 11 merge gently, and gradually mix while passing through the torsional flow paths of the next elements 12 and 13. As a result, the fluid becomes a combined fluid and is discharged from the discharge port 14 of the cylindrical mixer 10. As described above, the static mixer 10 having no driving unit forms a combined fluid of different resins, and is different from a dynamic mixer having a rotary stirring blade and uniformly stirring and mixing.

In the figure, three mixer elements are connected in series (however, the position of the circular through-hole of the middle element 12 is rotated by 90 ° with respect to the front and rear elements 11, 12), but the number of elements is appropriately increased or decreased. Then, by changing the state of merging, for example, a pattern from a coarse pattern to a fine pattern can be obtained.

In addition, flow control valves 15 to 17 are provided in the supply pipes 7 to 9 for the liquid resins 1 to 3, that is, before the liquid resin inlets 7a, 8a and 9a, to control the flow rate of each resin. By adjusting the ratio, the injection ratio of the resin 1 for the base material and the resins 2 and 3 for patterning into the mixer 10 can be changed to adjust the form of the pattern of the artificial marble.

The liquid resin discharged from the discharge port 14 of the static mixer 10 as a combined fluid of the resins 1 to 3 is injected through a filling pipe 18 into a molding die 19, for example, a box-shaped closed die of a vertical type. The injection is performed from the injection port 20 of the mold 19. Inlet 2
The position and the shape of 0 are not only a cylindrical shape provided at the corner of the upper lid of the box-shaped mold 19, but also provided at an end of the upper lid as shown in FIG. The outer shape of the hanger type may be formed on the top plate 21 of the "closer ridge" type, and the inlet 20 may be connected to the top of the top plate 21 and may be appropriately selected depending on the pattern form of the artificial marble.

[0014] The two or more liquid resins that have been combined are used in a molding die 1.
When injected into the mold 9, the entire mold 19 is heated by an oven or the like to harden the resin in the mold 19, and then cooled to take out the patterned plate-like artificial marble from the mold 19. The shape of the molding die 19 is not limited to a rectangular box shape, but can be variously selected depending on the shape of the molded product.

[0015]

According to the production method of the present invention, a fluid mixture of a liquid resin serving as a substrate and a liquid resin for patterning can be efficiently injected into a closed mold by a static mixer. The shape of the pattern can be easily and variously adjusted by selecting the number of elements of the static mixer and adjusting the injection amount by the flow control valve installed in front of the inlet to the mixer. A patterned artificial marble can be produced economically and easily.

[Brief description of the drawings]

FIG. 1 is an overall flowchart of a method for producing a patterned artificial marble according to the present invention.

FIG. 2 is a sectional side view showing an example of a static mixer used in the present invention.

FIG. 3 is a perspective view showing an example of a molding die used in the present invention.

FIG. 4 is a partial cross-sectional perspective view of a mixer element used for a static mixer.

[Explanation of symbols]

 1-Liquid resin to be a base material of artificial marble 2-Liquid resin for patterning 3-Liquid resin for patterning 4-Pressure tank 5-Pressure tank 6-Pressure tank 7-Supply pipe 8-Supply pipe 9-Supply Pipe 10-Static mixer 11-Mixer element 12-Mixer element 13-Mixer element 14-Discharge port 15-Flow control valve 16-Flow control valve 17-Flow control valve 18-Injection pipe 19-Mold 20-Injection 21 −Bridge type roof

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // B29K 33:00 B29K 33:00 67:00 67:00 B29L 31:10 B29L 31:10 (72) Inventor Muramatsu Katsumi 1807-4, Nakano, Kamitakano, Yachiyo-shi, Chiba F-term within Takagi Kogyo Co., Ltd. (Reference) 2D032 AB02 4F204 AA21 AA24 AF09 AH43 AH46 AH51 AR14 EA03 EB01 EF01 EF23 EF47

Claims (3)

[Claims] 1. A liquid resin serving as a base material of artificial marble and one or more kinds of liquid resins for patterning are respectively injected into static mixers from different injection ports to be joined, and the combined fluid is formed into a molding die. A method for producing a patterned artificial marble, characterized by injecting and curing. 2. The pattern of the artificial marble is adjusted by adjusting the flow rates of the liquid resin serving as the base material and the liquid resin for patterning by a flow control valve installed in front of the inlet of the static mixer. The method for producing a patterned artificial marble according to claim 1, wherein 3. The method for producing a patterned artificial marble according to claim 1, wherein the liquid resin as a base material and / or the liquid resin for patterning is a polyester resin-based or acrylic resin-based compound for artificial marble.