KR100648953B1 - Producing method of block having artificial lawn mat using waste rubber chip - Google Patents

Abstract

The present invention relates to an artificial turf block using a waste rubber chip,

Stacking a composite powder of a waste rubber chip and a binder powder on a grass-side opposite surface of the artificial turf where the artificial turf is planted to a predetermined thickness; Heating and pressing the laminated artificial turf portion and the composite powder at a predetermined temperature and pressure to form a rubber block portion formed of the composite powder on the artificial turf portion and simultaneously compress and fix the artificial grass portion and the rubber block portion; Characterized in that comprises a.

According to the present invention, since the artificial turf portion and the rubber block portion are formed in one process, and their purpose can be achieved at a low temperature and low pressure than before, the number of equipments required and the number of labors are greatly reduced, thereby improving productivity and manufacturing. The cost is reduced. Further, according to the present invention, since there is almost no damage to the artificial turf portion, the quality and product yield are also remarkably improved. In addition, the present invention is capable of producing products of various thicknesses and specifications, and has the advantage that it is possible to manufacture the artificial turf block having more properties by modifying the shape of the chip or the laminated structure of the rubber block portion.

Waste rubber chip, artificial turf, binder, rubber block, crimp fixing

Description

Manufacture method of artificial grass block using waste rubber chip {PRODUCING METHOD OF BLOCK HAVING ARTIFICIAL LAWN MAT USING WASTE RUBBER CHIP}

1 is a side cross-sectional view showing a conventional artificial turf mat,

Figure 2 is a schematic diagram showing a manufacturing process of another conventional artificial grass mat,

Figure 3 is a schematic diagram showing the manufacturing process of the artificial turf block of an embodiment of the present invention,

4 is a schematic diagram showing a manufacturing process of another embodiment of the present invention;

5 is a schematic view showing a manufacturing process of another embodiment of the present invention;

6 is a side cross-sectional view of the artificial turf block manufactured according to the manufacturing process of FIG.

<Explanation of symbols for main parts of the drawings>

10,10 '... rubber block part, 11 ... granule chip,

11 '... Flat Chip, 11' '... Flat Chip,

12 ... binder, 20 ... artificial turf,

21 ... artificial turf, 5 ... heater,

P ... press, 100 ... artificial grass block,

200 ... molding machine.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to artificial turf blocks, and more particularly, to a method for easily manufacturing artificial turf blocks using waste rubber chips.

Recently, artificial turf mats have been widely used as flooring materials for playgrounds, golf courses, children's playgrounds, and trails. Artificial turf has less maintenance cost than natural grass, and has the advantage of excellent shock absorption ability and good appearance compared to sand, cement and clay blocks, which are common flooring materials.

Such artificial turf may be installed by directly planting grass on a mat placed on the ground, but since this method is inconvenient to install, usually a plurality of artificial turf mats in which a grass portion and a mat portion are integrally installed are installed on the ground. It is used a lot.

As the artificial turf mat as shown in FIG. 1, there is a method of manufacturing an artificial turf mat by attaching the turf part 20 in which the grass 21 is planted with an adhesive B to the mat part M. However, the adhesive (B) is not only harmful to the human body, the mat manufactured as described above has a limit in the bonding force of the mat portion (M) and the grass portion 20, so the grass portion 10 and the mat portion in accordance with long-term repeated use There was a limit to the durability of the artificial turf mat, such as the separation of (M).

For this reason, as shown in FIG. 2, the vulcanized mixture of the waste rubber and the raw rubber is molded into a plate shape through the rolling roller 1, and then manufactured into each mat portion M, and then the mat portion M The method of manufacturing an artificial turf mat has been proposed by heating and melting the upper layer of the grass part 20 by pressing and fixing the upper part of the mat part M (see Korean Utility Model Registration No. 0281720).

However, the above method has the following disadvantages.

First, in order to mix waste rubber, which was in the form of finished product (ie, already vulcanized) with raw rubber, a desulfurization process of waste rubber is additionally required as a preliminary process of the vulcanization mixing process.

Second, since the mat portion (M) of the completed form by vulcanization and mixing again to combine with the grass portion 20, for mating the mat portion (M) and grass portion 20 180 ° or more, 180 tons or more Since high temperature and high press pressure are required, a lot of input energy is required and manufacturing cost is increased. In addition, under such high temperature and high pressure, there is a fear that turf will be damaged, such as melted or crushed artificial turf usually made of nylon. For this reason, in the conventional method, in order to protect the grass in the mating process of the grass portion 20 and the mat portion M, an additional device such as installing a separate cooler 6 in the upper press 4 was required.

Third, in the above method, in order to adjust the thickness of the mat part M, the interval between the rolling rollers 1 should be adjusted. There is a need to stop the operation of the apparatus for adjusting the thickness in the manufacturing process of the mat portion (M), there was an inconvenience to adjust the interval of the rolling roller (1).

Fourth, because the method is crimped at high temperature and high pressure, the heater 5 is installed in the lower portion 3 of the mat portion M, not on the grass side, in order to prevent damage to the grass. However, when the thickness of the mat portion M is thick, it is difficult to melt the upper portion of the mat portion due to the limitation of heat transfer, and thus the conventional method described above has a limitation that cannot be applied to the thick mat portion M having a predetermined thickness or more. Therefore, the conventional method, which can be applied only to a thin mat portion in the form of a sheet, has a limitation in manufacturing products of various specifications. In particular, when the thickness of the mat portion is small, the shock absorbing effect is also small, when installed in a playground or the like increases the risk of injury of children.

As described above, the conventional artificial turf mat manufacturing method, in which the mat part manufacturing operation and the lawn part attaching operation are performed separately, not only decreases productivity and increases manufacturing cost due to increased airflow, demand for high temperature and high pressure, and additional equipment. As a result, the product specifications that can be produced are also limited, which makes them practical.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and by simultaneously performing the fixing of the grass portion and the molding of the rubber block portion corresponding to the conventional mat portion to which the grass portion is coupled, an increase in productivity and a reduction in manufacturing cost are achieved. An object of the present invention is to provide a method for manufacturing artificial turf mats that can manufacture products of various specifications.

Artificial grass mat manufacturing method of the present invention for achieving the above object,

Stacking a composite powder of a waste rubber chip and a binder powder on a grass-side opposite surface of the artificial turf where the artificial turf is planted to a predetermined thickness;

Pressing the laminated artificial turf portion and the composite powder to a predetermined temperature and pressure to form a rubber block portion formed of the composite powder on the artificial turf portion and simultaneously pressing and fixing the artificial grass portion and the rubber block portion; It is configured to include.

Preferably, the molding and pressing fixing step is performed by heating from the bottom of the grass-side surface of the artificial turf and pressing from the top of the laminated composite powder.

In addition, the waste rubber chip is preferably composed of a granule chip and a piece chip.

Further, it is more preferable to laminate and shape a composite powder layer made of fine fine chips and a binder powder thinner than the flat chips of the waste rubber chips between the artificial turf portion and the composite powder layer.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention, the same reference numerals will be used for the same parts of the artificial turf block of the present invention.

In the present invention, the artificial turf portion refers to a mat-shaped member in which artificial turf made of a conventional material is planted. In addition, in the present invention, the block is a concept including not only a thin plate-like sheet or mat, but also a form having a thickness much thicker than the sheet such as a rectangular parallelepiped shape. As will be described later, according to the present invention, since it is possible to produce products having various thickness specifications, in the present specification, in order to clarify the scope of the present invention, rubber blocks or artificial turf blocks instead of conventional names of mats or artificial turf mats are used. The term is used.

Figure 3 is a schematic diagram showing the manufacturing process of the artificial turf block of an embodiment of the present invention.

As shown, the artificial turf 20 into which the artificial turf 21 is implanted is placed in the molding machine 200, and the waste rubber chip 11 and the binder powder are disposed on the grass-side opposite surface of the artificial turf 21. The composite powder mixed with (12) is laminated to a predetermined thickness.

The laminated artificial turf 20 and the composite powder are heated and pressurized at a predetermined temperature and pressure to form a rubber block 10 made of the composite powder on the artificial turf 20 and at the same time the artificial turf portion ( 20) and the rubber block portion 10 by pressing and fixing, the artificial turf mat of the present invention is produced.

The waste rubber chip 11 is chopped waste rubber such as waste tire into a predetermined size and a predetermined shape. As the binder 12, for example, a commonly used rubber binder such as TDI or MDI can be used, and the present invention can achieve the object of the present invention even at low temperature and low pressure, as described below, and thus is harmless to human body. It is particularly preferable to use an MDI binder which can be applied even under low pressure.

The main feature of the present invention is to reduce the number of man-hours by forming the rubber block portion 10 and combining the artificial turf portion 20 and the rubber block portion 10 by an integrated process, and also reduce the chip shape. The rubber block portion 10 is formed from a composite powder in which the rubber 11 and the predetermined binder powder 12 are mixed, thereby significantly reducing the temperature and pressure for pressing and fixing the artificial turf portion 20.

As described above, since the conventional method is to melt the finished mat portion M, very high temperature (180 ° C. or more) and pressure (180 ton or more) are required, which may damage the grass portion 20.

However, in the present invention, the waste rubber 11 in the form of a fine chip is bonded and formed by the powdery binder 12, and in this process, the natural rubber portion 20 is naturally bonded to the waste rubber. It is not necessary to have a high enough temperature to be completely melted, and only enough to be bonded to each other by the binder 12 (that is, a temperature at which the rubber chips 11 can be partially melted; about 120 ° C. or less). Only need. In addition, the present invention is because the artificial turf 20 is naturally coupled to the rubber block 10 in the molding process of the rubber block, it does not require a high pressure as in the conventional compression fixing method. According to the present invention, the artificial turf 20 and the rubber block 10 may be combined with a low pressure of 5 to 10 tons.

Particularly, since the waste rubber is in the form of a fine chip, and the fine waste rubber chip 11 and the fine powdery binder 12 are combined, the coupling reaction efficiency is greatly increased, so that even under the low temperature and low pressure described above. Molding of the rubber block 10 and the coupling of the artificial turf 20 can be made effectively.

In addition, when the appropriate binder 12 (eg, MDI binder) is selected, the molding temperature of the rubber block 10 and the bonding temperature of the artificial grass 20 may be lowered to about 100 degrees or less.

Therefore, according to the mechanism of the present invention, not only the molding of the rubber block portion 10 and the artificial turf portion 20 are combined in one process, but also the manufacture of the artificial turf block under a much lower temperature and lower pressure than in the prior art As a result, there is little fear that the artificial turf 20 will be damaged, and productivity can be increased and manufacturing cost can be greatly reduced.

Another feature of the present invention is that it is possible to produce products of various thickness specifications. That is, in the present invention, simply by adjusting the thickness (height) of the composite powder laminated on the back of the grass 20, or by adjusting the pressure applied to the composite powder, the rubber block 10 of various thicknesses and specifications simply Can be prepared. Therefore, not only the sheet or mat form, but also the rubber block portion 10 having a shape such as a rectangular parallelepiped can be manufactured.

On the other hand, it is preferable that the forming and pressing fixing step is made by heating from the bottom of the grass-side surface of the artificial turf 20, and pressing from the top of the laminated composite powder.

As described above, since the artificial turf block of the present invention can be manufactured at a low temperature of 120 ° C. or lower, the heater 5 is installed in the lower portion of the molding machine 200 (that is, the lower portion opposite to the artificial turf portion 10). Even if there is little risk of damaging the artificial turf 21 (generally, artificial turf made of nylon is hardly thermally deformed up to a temperature of 120 ° C). When the heater is installed on the artificial turf 21 side, the heat transfer effect to the portion where the artificial turf 20 and the rubber layer (composite powder layer) contact is increased, so that the artificial turf 20 and the rubber block portion ( 10) is easily combined. Further, when the artificial turf 21 is faced down and pressed by the press P from the top, the grass 21 is pressed by the press P and the molding machine bottom 201 (or the lower press) so that the grass 21 is pressed. It is also effective that the overall height of the surface becomes uniform. At this time, the press P pressure is not so high, so the grass 21 is not damaged enough.

By adjusting the shape and size of the waste rubber chip applied to the present invention, not only the coupling effect of the molding of the rubber block 10 and the artificial turf 20 is further maximized, but also the characteristics of the finished artificial grass block are improved. do. That is, in Fig. 3, a so-called granule-type waste rubber chip 11 of circular, elliptical or near rectangular shape is used. 11 ') is mixed and molded, compared to the rubber block portion 10 of the same thickness formed only by the granule-type chip 11, the bonding force is more excellent and the shock absorbing effect is further increased. In this type of rubber block 10, the chipping chip 11 'is further interposed between the granule chip 11 intervals, thereby further strengthening the chip-to-chip bonding, so that the molding efficiency is always maintained even under the same molding temperature and pressure.

In addition, as shown in FIG. 5, between the artificial turf portion 20 and the layer in which the granule and the chip-shaped chips are mixed, the finer chip 11 ″ and the binder powder 12 that are thinner than the chip 11 ′ are provided. By molding through a layer made of), an artificial turf block 100 (see FIG. 6) having more excellent characteristics can be manufactured. Since the surface of the rubber block 10 in contact with the grass 20 is subjected to numerous repeated loads, it is essential to maintain a high surface hardness. Therefore, when the rubber block portion 10 'is formed between the composite powder layer as shown in FIG. 4 and the artificial turf portion 20 through a layer of a finer chip, as shown in FIG. The hardness of the surface of the rubber block portion 10 'in contact with 20 can be improved, and at the same time, the impact absorption effect can be improved by the rubber block portion 10 in which the granule chip-shaped chip of the lower portion is mixed and molded. At this time, the binder 12 included in the upper and lower rubber block portions 10 and 10 'may be the same kind, but other types more preferable in accordance with the type and size of the flat chips 11' and 11 ''. Of course it can be used.

The size of the chip to be applied to the present invention is not limited to a specific range, and may be variously selected in view of the convenience of manufacturing and the use and characteristics of the artificial grass block. Typically, the granule chip 11 having a diameter of 5 to 8mm, in the case of the flap chip, the flap chip 11 mixed with the granule chip is 5 to 10 mesh, the fine flaky chip of the layer in contact with the artificial turf portion 20 (11 ') is recommended to use 16-20 mesh. In addition, in this invention, a chip | tip chip means that the length is at least 4 times or more compared with the thickness.

As described above, according to the present invention, since the artificial turf portion and the rubber block portion are formed in one process, and the purpose can be achieved at a low temperature and low pressure, it is possible to significantly reduce the number and the number of facilities required. The productivity is improved and the manufacturing cost is reduced.

Further, according to the present invention, since there is almost no damage to the artificial turf portion, the quality and product yield are also remarkably improved.                     

In addition, the present invention is capable of producing products of various thicknesses and specifications, and has the advantage that it is possible to manufacture the artificial turf block having more properties by modifying the shape of the chip or the laminated structure of the rubber block portion.

Claims (4)

Stacking a composite powder of a waste rubber chip and a binder powder on a grass-side opposite surface of the artificial turf where the artificial turf is planted to a predetermined thickness; Heating and pressing the laminated artificial turf portion and the composite powder at a predetermined temperature and pressure to form a rubber block portion formed of the composite powder on the artificial turf portion and simultaneously compress and fix the artificial grass portion and the rubber block portion; Method of manufacturing an artificial turf block comprising a. The method of claim 1, The artificial turf block manufacturing method characterized in that the heating from the lower side of the grass-side surface of the artificial turf portion, pressing from the upper portion of the laminated composite powder to form and compress. The method according to claim 1 or 2, The waste rubber chip is a manufacturing method of artificial turf block, characterized in that consisting of granule chips and flaky chips. The method of claim 3, Between the artificial grass portion and the composite powder layer, a method for producing an artificial turf block characterized in that the composite powder layer consisting of fine chips and binder powder thinner than the chips of the waste rubber chip is further laminated and molded .

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