KR20110048087A

KR20110048087A - artificial lawn of multiple fuction and it's mold

Info

Publication number: KR20110048087A
Application number: KR1020090104749A
Authority: KR
Inventors: 김전
Original assignee: 김전
Priority date: 2009-11-02
Filing date: 2009-11-02
Publication date: 2011-05-11

Abstract

PURPOSE: Multi-functional artificial turf and a mold for the same are provided to improve the restoring property and reduce the light reflectance of artificial turf. CONSTITUTION: Multi-functional artificial turf is composed as follows. A thermoplastic resin band is molded to twist with one turn at regular intervals. A projecting support line is formed on one side or symmetrically both sides along the width center of the band.

Description

Artificial lawn of multiple fuction and it's mold

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial grass having a multifunctionality and a mold thereof. Specifically, a center line of artificial grass width in a general band or flat yarn shape using a flexible and elastic thermoplastic resin is used. The present invention relates to a multifunctional artificial turf and an artificial turf molding die formed by protruding support bands in the longitudinal direction and twisted one rotation at a predetermined interval in the longitudinal direction.

Natural grass has long been cultivated for golf fairways or garden landscaping and is still widely used for this purpose. In recent years, natural turf has been planted and used in various stadiums including baseball stadiums, soccer stadiums, tennis courts, etc. to protect players. However, the natural turf that has lived in the athletic stadium is severely damaged by the turf and rupture of the turf due to the intense competition, and it takes quite a long time for the turf to return to its original state.

Natural grass has recently been toughened by fiber yarns extruded or spun in the form of bands (flat yarns), monofilaments or fibers made of synthetic resins such as polyamide, polyester, polypropylene, PVC and polyethylene. Due to the strength of artificial turf with physical properties, the position of natural turf in sports stadiums is greatly weakened. Most baseball and football stadiums are being replaced by artificial turf, and nowadays even elementary and junior high school grounds have artificial turf. It is often seen.

In general, artificial turf is made of polyester, polypropylene, polyamide, polyethylene, and added with conventional additives such as sunscreen, anti-aging agent, flame retardant, pigment, etc. and extruded or spun by extruder in the range before and after melting point of each synthetic resin. Bands or flat yarns in the range 1.2 to 2 mm wide and 0.15 to 0.25 mm thick, artificial grass in the form of monofilaments, artificial grass in the form of fine fibers, and artificial grass in the form of fine fibers. B Fiber type is not used except in special cases, and artificial turf in the form of band (flat yarn) is widely used.

In the above, the artificial turf is in the form of band (flat yarn), monofilament, and fiber, and there is still no artificial turf outside of this type. The artificial turf mat structure for constructing the artificial turf has various configurations. Looking at a specific example of such a conventional technology,

Korean Patent Publication (Publication No. 10-2007-35003) introduces "method for manufacturing synthetic fibers for use in artificial turf stadiums and its synthetic fibers". In the method of manufacturing artificial turf), the synthetic material layer has a content related to a method for manufacturing artificial turf synthetic fiber (artificial grass) composed of different synthetic material layers using a coextrusion process. As in 1B, 1C, and 1D, the fibers 10, 20, 30, 40 (the artificial turf in the form of a flat yarn) extrude the artificial turf in the form of a flat yarn as described above, but the artificial turf is longitudinally oriented by coextrusion. As artificial grass (fiber) in the form of a flat yarn divided into one or more different synthetic materials can be said to be artificial grass having different physical properties for each synthetic material.

In another prior art, the Patent Publication (Publication No. 10-2002-43461) discloses a "football artificial turf structure" and a filament disposed on the bottom plate 2 constituting the structure shown in FIG. The first artificial turf formed in the form of a straight line of the yarn 3 and the waste tire rubber chips 4 are disposed on the first tire and formed in the form of a straight line of the PP yarn 5 to prevent the flow of the waste tire rubber chips 4. Like artificial turfgrass, the second artificial turf is artificial grass in the form of filament yarn and the second artificial turf is flat yarn or band-shaped artificial turf made of PP material.

As another conventional technique, the Korean Registered Utility Model Publication (Registration No. 20-230073) discloses the technical content of "artificial turf structure of artificial turf playground for soccer" or artificial turf used in artificial turf structure. The artificial turf layer was formed by planting between artificial turf in the form of band (straat yarn). Here, artificial turf in the form of pile (flat yarn) made of thin and long filament yarn is used.

In addition, as a prior art, the domestic registration publication (Registration No. 10-495477) has crimped the pile 1 in forming the artificial turf layer of "Golf green artificial turf structure". It can be seen that the artificial turf layer was formed from the artificial turf processed by the split.

As described above, fibers or piles for artificial turf are artificial turf in the form of band (flat yarn) filament or fiber, or all of the artificial turf that has been crimped or processed by such artificial turf. can do.

The artificial turf has a slight difference depending on the type of synthetic resin, but generally lacks support. In particular, the filament type artificial grass or the piva type artificial grass is delicate and more vulnerable to supporting force, and it is easily lifted by rain or the load or impact shear force of the player. Although the artificial turf of the band or pratyan type is flat and straight, it does not have good bearing capacity, but the appearance of the formed grass layer lacks denseness and fullness as well as its flatness, which is a large reflectivity.

The multifunctional artificial turf according to the present invention is an artificial turf that improves the defects of the conventional artificial turf, thereby reinforcing the bearing capacity of the artificial turf, thereby improving the returnability of the artificial turf, preventing entry, and reducing the reflection of sunlight or light. Multi-functional artificial to reduce the burns and injuries by preventing the players from being disturbed by reflections, making the dense and fullness when forming the artificial turf layer, and the configuration of the grass with flexible and elastic material selection and cushioning To provide a grass and its mold.

It is a flexible and elastic thermoplastic synthetic resin, which has a protruding support band formed along a longitudinal center line of ordinary fret yarn shape, and provides artificial grass in which the flat yarn is twisted at regular intervals and a mold for forming such artificial turf. As a result, reinforcement can be reinforced by reinforcing the support of artificial turf, and by reducing the reflectivity by twisting the artificial turf, it is possible to achieve the object of the present invention by making the artificial turf layer appear rich.

The multifunctional artificial turf according to the present invention does not interfere with the competition of the player while greatly reducing the amount of reflection, and can easily prevent the artificial turf from lifting, and also has a compact and fullness of the artificial turf layer, and is flexible and elastic. Multifunctional artificial grass and its mold that can greatly reduce burns and injuries in case of sliding or falling of a player by having elasticity and friction buffering effect are composed of the material.

Multifunctional artificial turf according to the present invention is a band in the range of 1.2 ~ 2mm, thickness 0.15 ~ 0.25m / m which is adopted by the band type (flat yarn type) artificial turf that has been most commonly used as shown in Figure 1 Extruded into a mold, but as shown in Figure 2 protruding support bands (3) is formed on one side or both sides according to the center of the width (2) of the band (1) and twisted by one rotation at a predetermined interval formed functional artificial grass (A) It can be said.

Functional artificial grass (A) is formed by twisting the conventional band (flat yarn) 1 by one turn at a predetermined interval in the longitudinal direction, unlike the conventional synthetic resin band (flat yarn) 1 itself is artificial grass. The artificial turf A1 and the protruding support belt 3 are formed in the longitudinal direction of the band around the width 2 of the band (straat yarn) 1 as shown in FIG. Shaped artificial turf A2 and the protruding support 3 are symmetrically formed on both sides as shown in Fig. 2c, and the artificial turf is formed by twisting one turn at regular intervals along the longitudinal direction of the band (pretzel) 1 ( A3) is included in the present invention.

The mold B for forming the artificial turf A as described above is extruded in a spiral shape on the surface of the cylindrical body 12 that matches the inner diameter of the circular tube 11 inside the circular tube 11 as shown in FIG. 3A. The upper end of the cylindrical body 12 formed by inserting and fixing the cylindrical body 12 formed with the inner surface of the circular tube 11 is lower than the upper end of the circular tube 11 and the cylindrical body 12 and the circular tube 11 are formed. The artificial molding (A1) forming mold (B1) having the inlet 15 and the outlet 16 of the extrusion passage 13 formed at the upper portion of the space 14 and the abutment surface at the upper side thereof is aligned. In another embodiment of the artificial turf mold of the present invention, a circular tube is formed on the inner surface of the circular tube 21 in which the extrusion passage 23 is formed in a gentle spiral shape on the inner surface of the circular tube 21 as shown in FIG. Insert and fix the cylindrical body 22 equal to the inner diameter of the upper part of the cylindrical body 22 so that the upper end of the circular tube 21 is lower than the upper end of the circular tube 21 and the upper and lower sides coincide with each other. It is a functional artificial grass (A1) molding die (B2) in which an injection hole (25) and an outlet hole (26) are formed on the side of the space portion (24) and the abutment surface.

The artificial turf molding die (B1) and the mold (B2) is a mold for molding the artificial grass (A1) shown in Figure 2a, the difference is whether the extrusion passage is formed on the inner surface of the cylinder or the circular tube.

Also, the mold for forming the functional artificial grass A2 shown in Fig. 2B is a metal mold B3 of the functional artificial grass A2 shown in Fig. 2B as the mold of the cross-sectional view shown in Fig. 4A or 4B in Figs. 3A and 3B. ) And the mold shown in the cross-sectional view of AA in FIGS. 4C and 4D is a mold of the functional artificial grass A3 shown in FIG. 2C.

4A, 4B, 4C, and 4D,

In Fig. 4A, as the mold B3 for molding the functional artificial grass A2, the groove 35 'is formed on the outer surface of the cylindrical body 22 for forming the protruding support belt 3 of the functional artificial grass A2. It is provided with the inlet 35 and the outlet 36 not shown.

Figure 4b is also a mold (B4) for molding a functional artificial grass (A2) is different from the mold (B3) is the injection port 45, the discharge port 46 and the extrusion passage 43, not shown 45 is formed What is formed in the inner surface of the circular tube 41 can be called a difference.

4C and 4D show a mold B5 for molding functional artificial grass A3, and FIG. 4D shows an extrusion passage 55 having one groove 55 'formed on the outer surface of the cylinder 52. FIG. And the other groove 55 'is a mold B5 formed on the inner surface side of the circular tube 51, and FIG. 4C shows that the injection hole 65 having one groove 65' is a circular tube 61. It is a metal mold | die B6 formed in the inner surface of the other groove 65 'and formed in the outer surface of the cylinder 62. As shown in FIG.

The method of manufacturing artificial grass (A: A1, A2, A3) using the molds (B: B1, B2, B3, B4, B5, B6) as described above. Polypropylene, polyethylene may be used, but it is advantageous to select polyethylene as the most suitable. For this reason, polyamides, polyesters, and polypropylenes which have good tensile strength and wear resistance have been used in the past, but recently, as the race becomes fierce in sports fields, sliding and tackle and falls frequently occur. The frequency is increasing.

In order to prevent this, flexible, low coefficient of friction and elastic materials are required. As such materials, polyethylene is most suitable among thermoplastic resins and can be extruded in a temperature range of 150 to 180 ° C.

Using such synthetic water support material, the functional artificial grass (A: A1, A2, A3) is extruded into a mold (B: B1, B2, B3, B4, B5, B6) and wound while giving tension in a semi-solidified state. When fully cooled, functional artificial grasses (A: A1, A2, A3) can be produced. In addition, in manufacturing functional artificial grass (A) and mold for molding (B), be careful about the large number of unit molds (B) installed in the limited extruder of the extruder as much as possible to increase the production, so that the inner diameter of the round tube And a mold (B) having a smaller diameter of the cylinder, and also avoiding curling in the process of imparting tension after the extrusion of the functional artificial grass, and in the present invention, when the twisting degree of the synthetic resin band (flat yarn) decreases. As the functionality of artificial turf is poor, it is necessary to adjust the width of artificial turf, the inner diameter of circular tube and the diameter of the cylinder, and the width of artificial turf and the degree of twisting of the extrusion passage formed in the mold.

If the width of ordinary artificial grass or functional artificial grass according to the present invention is in the range of 1.2 to 2 mm and the width of the grass is set in the above range, the circumferential diameter of the mold is 5 to 10 times the width of the grass, and the inner surface of the circular tube is suitable. However, the rotational frequency of the extrusion passage formed on the surface of the cylinder may be suitable for the length of the cylinder according to one rotation of the extrusion passage in the range of 4 to 8 times the width of the artificial turf.

The characteristic characteristics of the artificial turf obtained by the above-described mold and method are that since the band (flat yarn) forming the artificial turf does not form a flat surface, the amount of reflection can be greatly reduced by sunlight or light. It does not interfere and has a protruding support (3), which reinforces the bearing capacity, thereby reducing the grass lying down. Also, when the player slides or falls on the stadium, the flexibility and elasticity of the primary polystyrene prevents friction and impact. The artificial turf can be reduced and the artificial turf increases due to the twist of the second artificial turf to cushion the sliding friction, thereby reducing burns and injuries. When the artificial turf layer is formed from such artificial turf, the base fabric which binds and fixes the artificial turf The artificial turf can be prevented from coming off and it is bulky. It seems to be filled.

1 is a perspective view of a multifunctional artificial turf according to the present invention

2 is a perspective view showing various embodiments of twisted artificial turf

Figure 3a is a perspective view of a mold for forming a multifunctional artificial grass according to the present invention

3b is a perspective view of another embodiment of a mold for molding a multifunctional artificial grass according to the present invention;

4A is a cross-sectional view taken along the line A-A of FIG. 3A

4B is a cross-sectional view taken along the line B-B in FIG. 3B

4C is a cross-sectional view of another embodiment of line A-A in FIG. 3A

4D is a cross-sectional view of another embodiment of line B-B in FIG. 3B.

Claims

Functional artificial grass formed by twisting a thermoplastic resin band (flat yarn) in a longitudinal direction at regular intervals.

The artificial turf according to claim 1, wherein the thermoplastic resin band (1) forms a protruding support band (3) on one side or both sides in the longitudinal direction at the center of the width.

The upper end of the cylindrical body is formed by inserting and fixing the cylindrical body in which the extrusion passage 13 is formed spirally on the inner surface of the circular tube on the inner surface of the circular tube with the inner diameter of the circular tube lower than the upper end of the circular tube 11. It is a functional artificial grass molding mold with the inlet and outlet of the extrusion passage formed on the upper side and the space part and the mating surface of the cylinder by matching the lower end of the cylinder and the circular tube.

4. The mold for molding turf according to claim 3, wherein one or two hops are formed in the extrusion passage.

Insert the cylindrical body with the same diameter as the inner diameter of the circular tube into the inner surface of the circular tube where the extrusion passage is formed spirally on the inner surface of the functional artificial grass molding mold circular tube, and the upper end of the cylindrical body is lower than the upper end of the circular tube. A functional artificial grass molding mold having an inlet extrusion passage and an outlet formed at the upper portion of the space portion 24 and the mating surface at the upper side thereof to coincide with both lower ends.

The mold for forming a functional turf of claim 5, wherein one or two grooves are formed in the extrusion passage.