KR100935572B1 - The apparatus of preparing elastomer ball for filling in artificial lawn on sport ground - Google Patents

Abstract

PURPOSE: An apparatus for manufacturing an elastomer sphere is provided, which maximizes ball bearing function and improves durability of the artificial lawn field. CONSTITUTION: An apparatus for manufacturing an elastomer sphere comprises an extruder(A), a cylindrical hydrothermal tub(B), a centrifuge, a hydrothermal collection tank, and a cooling bath. The apparatus for manufacturing an elastomer sphere is manufactured by the following steps. The raw material of the elastomer composition is stirred first at the high temperature. The master badge pellet is manufactured. A pellet is added in the mixture of the first step. The elastomer composition of the melting colloid is manufactured by second stirring. The elastomer composition of the melting colloid is extruded through a plurality of outlets and is cut. The cut chip is poured into the cylindrical hydrothermal tub and is spherically molded in the hydrothermal tub by the surface tension of the colloid phase chip. Hydrothermal water is eliminated in the centrifuge equipped with an elevated screw. The removed hydrothermal is collected to the bottom of the centrifuge lower and is circulated within the cylindrical hydrothermal tub. The elastomer sphere is taken out to the upper end of the centrifuge screw and is cooled.

Description

The apparatus of preparing elastomer ball for filling in artificial lawn on sport ground}

The present invention relates to an apparatus for producing an elastic spherical body made of an elastomeric composition that is sprayed and filled on artificial turf in a baseball field, a soccer field, and recently, a school sports ground. A plurality of master badge pellets extruded through a plurality of extrusion holes and cut with a rotary cutting blade at the same time are introduced into a hydrothermal cylinder installed in a sealed state in front of the extrusion surface. The spherical shape is formed by spherical force by itself and is spherical in the process of moving with the hot water through the pipe connected to the cylindrical hot water tank. Take out to the top of the centrifuge It relates to an apparatus for manufacturing the artificial turf filled with concrete for the elastomer that is by cooling.

Artificial turf has green color and is not restricted by severe environmental conditions, so it is easy to manage after construction and it costs more in the early stage than natural grass, but it is economical in the long run and also has the same function as natural turf. Stadium preferences are growing.

The artificial turf, which is usually installed on athletic grounds or school grounds, is made of polyamide, polyester, polypropylene fiber, flat yarn, and monofilament fibers, and a brushed layer is formed on the surface, and the brushed layer is fixed under the brushed layer. The artificial turf layer impregnated or coated with a bitumen material such as synthetic resin or coaltal on the fabric bubble paper, or the artificial grass layer formed by adhering a rubber chip elastic sheet or a synthetic resin or rubber foam with an adhesive under the fabric bubble paper. .

The artificial turf athletic ground or school ground is completed by installing and restoring the artificial turf layer on the ground construction layer which has completed the drainage work.

In the early stages of using artificial turf soccer stadiums, baseball stadiums, or school grounds, artificial turf has been used as it is, but synthetic fibers with high frictional heat can cause severe burns when sliding or sliding during competition. As sand or fine stone is distributed between artificial turf, this can also cause abrasions, which reduces frictional heat and prevents injuries.

The appearance of elastic spherical bodies for filling of residues is slow, but recently, various types of fillers and filler compositions, the composition of artificial turf, and techniques for installing artificial turf have been introduced.

As a prior art related to the present invention, the domestic registered practical new infant publication (Registration No. 20-196049) discloses the technical content of "Soccer field artificial turf", which is a technical configuration, namely nylon or polypropylene piles (1) It is formed on the support (2), and the back coating layer (3) is formed on the bottom of the paper structure, and the foam cushion pad (4) of PVC or PE is laminated on the bottom of the back coating layer (3) and the artificial grass pile ( 1) It relates to artificial turf for soccer field in which silica sand and rubber or polyurethane chips are mixed and filled.

In the above technical configuration, when silica sand and rubber or polyurethane chips are mixed and filled between artificial grass piles, they may be scratched by silica sand (ø2mm). When buried or slid, the ball bearing function is not fulfilled, so the frictional heat of the artificial grass pile can not be greatly reduced, and the chips as described above are not spherical and have little ball bearing effect.

The Korean Registered Utility Model Publication (Registration No. 20-184138) describes the technical contents of the artificial turf structure of artificial turf. If the player falls down or attempts to slid or tackle, sand or silica sand is hard, and the ball bearing function cannot be properly exercised, and thus the frictional heat generated by the raising (fiber) can not be greatly reduced, which leaves burn concerns. In addition, the conventional technology related to the elastomer filling composition and elastomer filling material for artificial grass directly related to the present invention is disclosed in Korean Patent Publication (Publication No. 10-2008-68271). Rubber chip, a manufacturing method thereof, and a laminated structure for artificial turf field including the same "has been introduced. In the above description, the rubber chip for artificial turf filling is 2.5 to 4 parts by weight of urethane resin, 0.5 to 1.5 parts by weight of anion powder, and fine oil 0.2 based on 100 parts by weight of rubber chips crushed waste rubber (EPDM, tire). Rubber chip for artificial turf filling coated with ~ 1 part by weight.

Such rubber chips are pulverized waste rubber, but it is almost impossible to grind them in order to obtain rubber chips, which is usually formed into three pieces by cutting or cutting. Such a chip cannot be spherical and can be said to be rubber cutting pieces or cutting pieces of various shapes, so that there is little cloud effect.

In addition, the domestic patent publication (Registration No. 10-0868432), the technical content of "thermocrosslinked thermoplastic elastomer composition" and domestic registered patent publication (Registration No. 10-780229), the "thermoplastic elastomer composition" Used elastomer chip and manufacturing method thereof ".

The former thermoplastic composition for artificial turf has a styrene block copolymer 100 parts by weight, an olefin copolymer 10 ~ 80 parts by weight, process oil 30 ~ 500 parts by weight, filler 100 ~ 800 parts by weight, crosslinking agent 0.5 ~ 7 parts by weight peroxide 1 to 10 parts by weight of the crosslinking accelerator and stabilizer and 1 to 10 parts by weight of the pigment relates to a thermoplastic elastomer composition for artificial turf. The latter invention is a method for producing an elastomer chip using the composition described above. Using a mixed extrusion device, the styrene-based block copolymer is first preheated for 1 to 10 minutes by maintaining the temperature at 60 to 120 ° C., and then stirred for 1 to 20 minutes to process oil injection therein, and then the elastic body is cut to a certain length (0.5 to 3 mm). It is a method of manufacturing a chip. The elastomeric chip produced by such a manufacturing method has the drawback that the ball bearing function cannot be completely achieved because a spherical body can not be obtained because the chip is cooled and cut of the extrudate such as noodles.

In addition, a "filler composition for environmentally friendly artificial turf" is introduced in Korean registered patent publication (Registration No. 10-799262). The filler composition is selected from the group consisting of 5-20% by weight of an olefin-based elastomer selected from the group consisting of 10-20% by weight styrene block copolymer (SEBS) homo polypropylene, modified polypropylene, and modified polyethylene, calcium carbonate and talc. Filler for environmentally friendly artificial turf, which comprises 0.1 to 0.15% by weight of at least one weathering agent and inorganic pigment selected from the group consisting of 40 to 55% by weight of at least one filler selected from the group consisting of UV stabilizers, sunscreens or ultraviolet absorbers and antioxidants. It relates to a composition.

However, the filler composition for artificial turf of the present invention or the filler composition for artificial turf of the above-mentioned domestic patent publication (Registration No. 10-868432) is advantageous in terms of low cost by using styrene block copolymer and olefin elastomer as main raw materials. In general, however, physical properties may be inferior to EPDM in terms of physical properties.

Most of the fillers for artificial turf of sports fields listed in the prior art have defects that do not perform excellent ball bearing action such as spherical bodies because most of them use waste rubber chips or elastic pellet pellets. .

The present invention improves the problem of artificial turf fillers in the conventional athletic stadium by forming the filler as a spherical body, thereby maximizing the ball bearing function, thereby minimizing friction with artificial turf during sliding and tackle of players. It prevents burns and tangles of grass to prevent jams and effectively formulates an elastomer concrete composition to secure stable properties such as tensile strength, tear strength, hardness, and elongation. The present invention provides an apparatus for preparing an elastomeric sphere for artificial turf filling that has excellent durability while continuously maintaining aging resistance, decomposition resistance and heat resistance by heat and light.

30% by weight of thermoplastic elastomer, 15% by weight of softener (white oil), 35% by weight of calcium carbonate, 15% by weight of talc, 0.8% by weight of antioxidant, binder ( Silica franc agent) 0.5% by weight, lubricant (EBS) 0.3% by weight, stabilizer 0.2% by weight, sunscreen and antistatic agent 0.2% by weight, pellets made of a master badge with 3% by weight of an olefin-based elastomer, the same temperature as above Melt colloidal extrudate of the composition kneaded in the second range in the range is extruded through a myriad of circular extrusion ports, and the chips simultaneously cut are dropped into a cylindrical hot water tank sealed at the rear end of the extrusion port, and the surface of the colloidal chips in the hot water tank. Hot water removed from the centrifuge with a rising screw through a tube connected to the cylindrical hot water tank while being formed into a full spherical shape by tension is collected and removed under the centrifuge. The object of the present invention can be attained by obtaining an elastomeric sphere by circulating back into the hot water cylinder and cooling the elastomeric spherical body to the top of the centrifuge screw.

It is excellent in tensile strength, tear strength, elongation, and maintains aging resistance, degradability and light resistance by effectively preparing the elastomer composition for artificial turf filling, thereby improving durability and maximizing ball bearing effect by molding artificial turf filler into a spherical body. It can be said to be an apparatus for manufacturing an artificial turf filling elastomer sphere excellent in preventing burns and abrasion due to frictional heat while minimizing friction with artificial turf when sliding and tackling players.

As described above, in the method of manufacturing the elastomeric spheres for artificial turf filling of the present invention and a device thereof, a specific manufacturing method will be described first.

The method for preparing the elastomeric sphere for filling artificial turf according to the present invention is 30% by weight of a thermoplastic elastomer selected from ethylene-propylene diene copolymer, styrene-ethylene / butadiene-styrene polymer, 15% by weight of white oil as a softener, and activated carbonic acid as a filler. 35% by weight of calcium, 15% by weight of talc as lubricant and filler are first kneaded and homogenized by an extruder maintained at a temperature of 130 to 180 ° C., 0.8% by weight of antioxidant, 0.5% by weight of silane capping agent as binder, lubricant (EBS) 0.3% by weight, 0.2% by weight of zinc stearate as stabilizer, 0.1% by weight of antistatic agent, 0.1% by weight of sunscreen mixed with 3% by weight of olefin elastomer to prepare a homogenized master badge pellet,

Adding the pellet to the homogeneous mixture of the first stage and maintaining the mixture at a temperature of 180 to 230 ° C. to prepare the molten colloidal elastomeric extrudate by kneading and homogenizing the mixture in a second step;

The molten colloidal elastomer composition is extruded through a plurality of extruded holes and simultaneously cut into pellets and dropped into a cylindrical hot water tank maintained at a temperature of 60 to 80 ° C. closed at the rear end of the extruder, and the surface of the colloidal chip in the hot water tank. The hot water removed from the centrifuge with a rising screw is transferred to the centrifuge by moving the mixture of elastomer spheres and water into the centrifuge while being spherical through the tube connected to the cylindrical hot water tank while being converted into a full spherical form by tension. It is collected in the hot water collection tank of the circulating through the tubular hot water tank again, the spherical elastomer spout is a method for producing an elastomer turf for artificial turf characterized in that the cooling by taking out the top of the screw of the centrifuge.

The mixing ratio of the elastomer spheres and water in the mixture of the elastomer spheres and water is 1: 3-5 ratios by volume, and there is no obstacle in forming the spherical chips into spherical form by surface tension.

Referring to the apparatus for manufacturing the artificial turf filling elastomer sphere, as shown in FIG. 1, a first hopper is formed on the front end of each of the first kneading chamber 1 horizontally installed and the second kneading chamber 2 extending horizontally thereto. 3) and the second hopper 4, the concentric rotary shaft 6 rotated by the motor 5 passes through the first kneading chamber 1 and the second kneading chamber 2, and in each kneading chamber At the rear end of the extruder having the rotary screw 7 and the rotary screw 8 installed on the concentric rotating shaft 6, a disc-shaped extruded plate 9 is provided and a plurality of peripheries of the extruded plate 9 are provided. An extruder A having a circular extrusion hole 10 arranged in a circular shape,

Cylindrical hot water tank (B) formed of a circular extruded plate (9) installed at the rear end of the extruder and a circular shear surface (14) of the cylinder (13) supporting and rotating the rotating shaft (12) connected to the motor (11) is formed. Inside the hot water tank (B), the rotary cutting blade (15) installed at the front end of the rotary shaft 12 while passing through the rotary shaft 12 is in contact with the disc-shaped extruded plate (9) and the upper portion of the cylindrical hot water tank (B) The hot water and the elastomer mixture supply pipe 16 is connected to the lower portion of the centrifuge (C) and the lower portion of the cylindrical hot water tank (B) is connected to the hot water injection pipe (17) connected to the hot water collection tank (D) Wow,

An outer cylindrical casing 18 and a cylindrical porous body or reticle 19 made of metal are provided inside the casing 18 and a chain 22 connected to the gear 21 by the motor 20 inside the cylindrical receptacle 19. The rising part screw 25 is installed around the rotation shaft 24 installed above the center of the interlocking gear 23 interlocked with the inner side, and the hydrothermal and spherical elastomer mixture supply pipe 16 is connected inside the lower end. Centrifuge (C) having a plurality of hot water discharge holes (26) formed at the lower end and an elastomeric concrete accumulating chamber (27) formed at the upper side, and an elastomeric spherical discharge pipe (28) installed at the side of the accumulating chamber (27). Wow,

The upper side is in communication with the hot water discharge hole 26 formed in the lower end of the centrifugal separator (C) and the hot water collection tank (D) connected to the hot water injection pipe (17) of the cylindrical hot water tank (B) on one side,

Below the hot water discharge hole 24 of the centrifugal separator (C) relates to an artificial turf filling elastomer sphere manufacturing apparatus composed of a cooling water tank (E).

Here, the rotary cutting blade 15 is installed in three radial bands radially at the shear center of the rotary shaft 12, the rotary cutting blade for cutting the extrudate coming out of the extrusion hole while being rotated and grounded with the disc-shaped extruded plate (9) to be.

In addition, the lifted partial screw 25 is divided into four at regular intervals about the rotating shaft 24, and is a lifted partial screw 25 in which the screw blade is adjacent to the inner surface of the cylindrical porous body or network 19.

Among the raw materials used in the production method, the ethylene-propylene copolymer is a ternary copolymer in which a third component (diene in the present invention) having an unsaturated bond is copolymerized with ethylene and propylene together. It shows the difference in brandability, and since unsaturated group is not a main chain but side chain, it has excellent properties such as elasticity, ozone resistance, weather resistance and heat resistance.

Styrene-ethylene-butadiene-styrene is a three-dimensional structure that absorbs mineral oil and softens easily. It is compatible with olefin elastomers, has very similar properties to natural rubber, and has excellent elasticity and originality.

In addition, as a softener, white oil is liquid paraffin petroleum jelly, which is compatible with the above polymers, has good cold resistance, non-pollution, color stability, good oxidation resistance, and imparts circular resilience to repulsive elasticity. It is especially compatible with EPDM and has low volume. In addition, in softening kneading or branding work, plasticizing rubber, saving energy and time of kneading branding, and dispersing of the compounding agent, facilitates the work of extrusion molding, improves the lubricity and increases the volume of rubber. In comparison with other softeners can be seen.

In addition, activated calcium carbonate as a filler is calcium carbonate treated with a normal calcium carbonate as a surfactant, and thus an elastomeric spherical body having good bending, tear resistance, and anti-aging property can be obtained when rubber is filled with calcium carbonate.

Talc powder can also reduce the wear properties of extruder screws, especially extruders, as a lubricant but also by weight.

In addition, the olefin elastomer used as a master badge has good compatibility with the above polymers, has properties similar to those of natural rubber, facilitates extrusion, and exhibits excellent plasticity. It is possible to improve the dispersibility and secure the homogeneity of the final product by adding it as a master badge together with the used microadditives.

 As other additives, the binder is a silane capping agent and silanes having functional groups such as amino groups, epoxy groups, and double bonds have a strong bond between organic materials and inorganic materials (inorganic fillers), which enhances adhesion between globular tissues and thus tensile strength tear steel. You can increase the degree.

Antioxidants are used for the nonionics, phenols, and amine compounds, and they can prevent deterioration due to decomposition of the organic compound elastomer and prevent the formation of peroxides, thereby extending the durability of the elastomer sphere. Alternatively, one or more of boron fluoride and the like can be selectively used, and excellent in dispersing function during kneading. Especially, it is very useful in manufacturing equipment by using a large amount of mineral raw material, that is, it is very useful in preventing abrasion of screw of extruder, especially extrusion hole. You can increase it.

In addition, sunscreens include benzophenones, benzotriols, phenols and the like, and have anti-aging functions due to decomposition, degradation and deterioration of organic substances such as elastomers.

In addition, a zinc stearate is used as a stabilizer, and a chem stud, an electro stripper, a leo stud etc. are used as an antistatic agent.

In the composition of the present invention, when the blending ratio of ethylene-propylene diene copolymers or styrene-ethylene-butadiene-styrene polymers and the blending ratio of activated calcium carbonate and talc, which is inorganic, increases, the tensile strength and tear strength deteriorate significantly. The lack of thermoplastic makes it difficult to form the shape of the grass-filling elastomer into a spherical body. Also, when the ratio of organic polymer increases, the tensile strength and tear strength can be increased, and the resilience and resilience can be greatly increased. However, the cost of raw materials will rise.

In order to determine the physical properties of the elastomeric spherical body according to the present invention, an elastomeric spherical body was prepared as follows using the above-described elastomeric composition manufacturing apparatus.

Example (1)

30 kg of ethylene-propylene diene copolymer, 15 kg of white oil, 35 kg of activated calcium carbonate powder, and 15 kg of talc powder were first kneaded and stirred at 150 ° C. in the first kneading chamber (1) through a hopper (3), followed by 3 kg of elastomer and phenol. Pellets masterbatched with 0.8 kg of antioxidant, 0.5 kg of silane capping agent, 0.3 kg of lubricant (EBS), 0.2 kg of zinc stearate, 0.1 kg of benzophenone-based sunscreen, and 0.1 kg of chemistide into the hopper (4). Pellets obtained by extruding the molten colloidal elastomer composition by secondary kneading with the primary kneading mixture in the second kneading chamber 2 maintained at a temperature drop centrifugal separator in a hot water source tank B maintained at a temperature of 70 ° C. Separation with a diameter of 1.8mm ~ 2.1mm to obtain a construct.

As a result of testing the appearance and physical properties of the globular body, the experimental result table of Table 1 was obtained.

Table (1) Test result of elastomer spherical body

Test Items division shame Measure Appearance Perfection - Visually The tensile strength Kgf / cm2 21.5 ASTMD 638 Elongation % 625 ASTMD 638 Hardness shore A 46 ASTMD 2240 Tear Kg / cm 7.5 ASTMD 624 importance - 1.4 Self-measurement

1 is a schematic view of the present invention artificial turf filling elastomer specific manufacturing apparatus.

Figure 2 is an exploded perspective view of a cylindrical hot water tank of the present invention elastomer production apparatus.

Figure 3 is a cross-sectional view of the cylindrical hot water tank of the present invention elastomer production apparatus.

Figure 4 is a cross-sectional view of the centrifuge and hot water collection tank of the present invention elastomer production apparatus.

Explanation of symbols on main parts of the drawings

1 ..... 1st kneading room 2 ..... 2nd kneading room

3 ..... First Hopper 4 ..... Second Hopper

5 ..... motor 6 ..... axis of rotation

7 ..... rotating screw 8 ..... rotating screw

9 ..... Extruder 10 ..... Extruder

11 ..... motor 12 ..... axis of rotation

13 ..... Cylindrical 14 ..... Circular Shear

15 ..... rotary cutting edge 16 ..... mixture feed pipe

17 ..... hydrothermal injection pipe 18 ..... casing

19 ..... Cylindrical Reticular 20 ..... Motor

21 ..... Gear 22 ..... Chain

23 ..... Interlocking gear 24 ..... Shaft

25 ..... screw 26 ..... hydrothermal vent

27 ..... accumulation chamber 28 ..... exhaust pipe

A ..... Extruder B ..... Cylindrical Hot Tub

C ..... centrifuge D ..... hydrothermal tank

Claims (3)

delete delete In a conventional extruder, an extruder (A) and an extruder (A) in which a disc-shaped extruder plate 9 is provided at the rear end of the extruder, and a plurality of circular extrusion holes 10 are arranged in a circle at the periphery of the extruder plate 9. Cylindrical hot tub B formed of the circular shear surface 14 of the cylinder 13 supporting and supporting the disk-shaped extrusion plate 9 and the rotating shaft 12 connected to the motor 11 is formed at the rear end of the column. Inside the water tank (B), the rotary cutting blade (15) installed at the front end of the rotary shaft 12 while passing through the rotary shaft 12 is in contact with the disc-shaped extruded plate (9) and the cylindrical hot water tank (B) upper portion Hydrothermal water and elastomer mixture supply pipe 16 is connected to the lower portion of the centrifuge (C) and the lower portion of the cylindrical hot water tank (B) is connected to the hot water injection pipe (17) connected to the hot water collection tank (D) and , An outer cylindrical casing 18 and a cylindrical porous body or reticle 19 made of metal are installed inside the casing 18 and a chain connected to the gear 21 by the motor 20 inside the cylindrical reticle 19. 22, a rising part screw 25 is installed around the rotating shaft 24 installed above the center of the interlocking gear 23 interlocked with the interlocking gear 23, and the hydrothermal and spherical elastomer mixture supply pipe 16 is connected to the lower end. And a plurality of hydrothermal discharge holes 26 are formed at the lower end thereof, and an elastomeric concrete accumulating chamber 27 is formed at an upper side thereof, and an elastomeric spherical discharge pipe 28 is installed at the side of the integrated chamber 27. )Wow, The upper side is in communication with the hot water discharge hole 26 formed in the lower end of the centrifugal separator (C) and the hot water collection tank (D) connected to the hot water injection pipe (17) of the cylindrical hot water tank (B) on one side, The apparatus for producing elastomeric spheres for filling artificial turf comprising a cooling water tank (E) below the hot water discharge hole (24) of the centrifuge (C).

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