KR100770776B1 - Mold-core for molding strut-bar - Google Patents

Abstract

A mold core for a strut bar is provided to improve durability of a tire by allowing static electricity generated inside the tire to be discharged easily and to increase traveling stability by preventing the tire from being slid in rainy and snowy day. A mold core for a strut bar(10) comprises a strut bar projection(400) and a strut bar extruding passage(410). The strut bar projection is projected at both sides of a cap thread extruding passage(100). The strut bar extruding passage is positioned inside the strut bar projection and connected to an under thread extruding passage(200). The strut bar projection is inclined toward in the extruding direction of the cap thread extruding passage.

Description

Mold for forming strut bar {Mold-core for molding strut-bar}

1 is a view showing a molding block for forming a strut bar according to the present invention,

Figure 2 is a view showing the front of the forming tool for forming a structural bar according to the present invention,

Figure 3 is a view showing the side cross-section of the forming tool for forming a strut bar according to the present invention,

4 is a view illustrating a process of forming a strut bar of the forming tool for forming a strut bar according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10: forming mold 20: cap tread

30: under tread 40: strug bar

100: cap tread extrusion flow path 200: under tread extrusion flow path

300: Tread wing extrusion flow path 400: Strok bar protrusion

410: Structural extrusion channel

The present invention relates to a molding mold, and more particularly, a strut bar protrusion protrudes from both sides of a cap tread extrusion channel, and a strug bar connected to the under tread extrusion channel inside the strut bar protrusion. It is possible to form the extrusion bar without an additional device or process by forming an extrusion flow path to easily discharge the static electricity generated inside the tire to the outside to improve the durability of the tire, driving on the rain or snow roads in winter and ice The present invention relates to a forming tool for forming a strug bar that can prevent slipping and improve straightness by improving driving stability.

In general, automobiles are an important means of transportation in real life, and as the quality of life is improved, the function and performance of the vehicle are required to be optimized. More is required.

The tire has various components installed therein to improve the riding comfort by mutually alleviating the external shock caused by the repeated stretching movement.

In recent years, as environmental problems have increased, fuel savings and the suppression of pollution caused by automobiles have become a priority, and tire makers have shown low rolling resistance, good braking on dry and wet roads and ice roads, and excellent frictional resistance. In order to manufacture a tire having characteristics such as low running noise, a large amount of silica is applied to the cap tread portion.

However, since the silica is a non-conductive material, static electricity generated in the tire cannot be discharged to the road surface while driving, and thus static electricity accumulates in the tire.

In particular, the static electricity accumulated in the tire is discharged by the wheel, and then discharged to the vehicle body, so that when the occupant's hand contacts the vehicle, the static electricity is discharged to the occupant, causing unpleasant shock and shortening the life of the tire. .

Accordingly, the present invention has been devised to solve the above problems, the strut bar protrusions are formed on both sides of the cap tread extrusion channel, respectively, and the inner side of the strug bar protrusion connected to the under tread extrusion channel It is possible to form the strut bar extruded passage to be formed without additional equipment or process to easily discharge the static electricity generated inside the tire to the outside can improve the durability of the tire, It is an object of the present invention to provide a molding block for forming a bar for structural bar that can improve driving stability by preventing slippage when driving snow roads and ice roads in winter.

The present invention for achieving the above object, in the molding mold formed with a cap tread extrusion passage, an underdraft extrusion passage and a tread wing extrusion passage to shape the cap tread, under tread and the tread of the tire, both sides of the cap tread extrusion passage Structural bar protrusions are formed in the protrusions, respectively, and a strug bar extrusion channel connected to the under-tread extrusion channel is formed inside the strut bar protrusion.

Preferably, the strut bar protrusion protrudes inclined toward the extrusion direction of the cap tread extrusion flow path, and the strug bar extrusion flow path is formed in the same manner as the inclination of the strug bar protrusion.

According to the above configuration, when the tread is formed, the cap tread may be separated into a central portion and a left and right portion, and the strut bar protruding upward of the under tread may be formed between the center portion and the left and right portions of the separated cap tread. As such, the structural bar can be formed without any additional equipment or process, so that the static electricity generated in the tire can be easily discharged to the outside, thereby improving the durability of the tire, and when driving on rain roads or during winter snow and ice roads. In addition, the driving stability can be improved by preventing the slippage and improving the straightness.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In addition, the present embodiment is not intended to limit the scope of the present invention, but is presented by way of example only, and various modifications may be made without departing from the technical gist of the present invention.

1 is a view showing a forming tool for forming a strut bar according to the present invention, Figure 2 is a view showing a side cross-section of the forming tool for forming a structural bar according to the present invention, Figure 3 The figure shows the tread forming process of the forming tool for forming a truck bar.

As shown in the figure, the molding tool 10 penetrates the inside of the tread wing extrusion passage 300 formed at a predetermined depth on both sides of the upper surface and the under tread extrusion passage 200 formed at a predetermined depth at the center of the lower surface. The cap tread extrusion passage 100 is formed.

At this time, the strut bar protrusions 400 protruding upward from both sides of the cap tread extrusion channel 100 are formed, and are connected to the under tread extrusion channel 200 inside the strut bar protrusions 400. The strut bar extrusion passage 410 is formed.

The strut bar protrusions 400 are formed at both sides of the cap tread extrusion passage 100, respectively, and the cap tread extrusion passage 100 is formed by separating the center portion from the left side and the right side. By separating the cap tread 20 into three parts, a groove is formed between each part.

The strug bar extrusion passage 410 is connected to the under tread extrusion passage 200 and is formed along the inner side of the strut bar protrusion 400 to the top height of the cap tread extrusion passage 100. do.

The strut bar extrusion passage 410 is a part of the under tread 30 rubber composition extruded along the under tread extrusion passage 200 is extruded to form a strut bar 40, the strut bar protrusion The strut bar 40 is inserted and extruded into the grooves between the respective portions of the cap tread 20 separated by 400 to be molded.

At this time, the strut bar protrusion 400 protrudes inclined upwardly toward the extrusion direction of the cap tread 20 so that the cap tread 20 is easily separated when the cap tread 20 is extruded. To form.

In addition, the strut bar extrusion passage 410 is formed at the same slope inside the strut bar protrusion 400 and is connected to the under tread extrusion passage 200 downward to extrude the under tread 30. A part of the under tread 30 rubber composition is extruded along the strut bar extrusion passage 410 to form a strut bar 40 to be molded with the under tread 30.

The upper end of the discharging end of the strug bar extrusion passage 410 is formed so as to match the height of the upper end of the discharging end of the cap tread extrusion passage 100, and the upper end of the strug bar 40 is formed of the cap tread 20. By coinciding with the upper end, the cap tread 20 and the strut bar 40 are simultaneously in contact with the road surface when driving.

As described above, when the cap tread 20 and the strut bar 40 simultaneously touch the road surface, the static electricity generated inside the tire is discharged to the road surface along the strut bar 40, thereby improving tire durability. Therefore, the static electricity discharged to the vehicle body can be minimized.

In addition, the rubber composition of the strug bar 40 has the same physical properties as the rubber composition of the under tread 30, the hardness is stronger than the rubber composition of the cap tread 20, the tire on the water road, snow road and ice road It prevents slipping and improves straight performance.

As described above, according to the present invention for forming a strut bar, the cap tread is separated into a central part and a left and right part when the tread is formed, and the upper side of the undertread is disposed between the center part and the left and right parts of the separated cap tread. By inserting the protruding stiffening bar can be formed, without the additional device or process to form the strub bar can easily discharge the static electricity generated inside the tire to the outside can improve the durability of the tire. In addition, it is a very useful and effective invention that can improve the driving stability by preventing the slip during the rain road operation or winter snow road and ice road operation to improve the straightness.

Claims (2)

In a molding mold in which a cap tread extrusion channel, an underdraft extrusion channel and a tread wing extrusion channel are formed to shape a cap tread, under tread and tread wing of a tire, Structural bar projections are formed on both sides of the cap tread extrusion channel, respectively, and a strug bar extrusion channel is formed inside the strut bar projections connected to the under tread extrusion channel. Forming mold for forming. The method of claim 1, The strut bar protrusion protrudes inclined toward the extrusion direction of the cap tread extrusion flow path, and the strug bar extrusion flow path is formed in the same way as the inclination of the strut bar protrusion molding. Detention.

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