CERAMIC TIRE STUD

Abstract

The present invention relates to a tire stud, which enables a snow tire to be used in every season and is a ceramic tread structure, which: can be used in all weathers on dry roads, wet roads, and even on icy roads, reduces braking, handling, road frictional noise, and a tire inner heat generated during driving on a road; and has an integrated groove portion and pin, which are more advanced than a conventional metallic tread pin and groove portion, wherein the ceramic thread structure is an integrated ceramic stud, which is applied to various stud patterns such as an existing rib type, rug type, rib and rug type, block type, and asymmetrical type, is particularly suitable even for an airless tire, being a next-generation tire, and is made of ceramic.

Claims

1. A method of inserting a tire stud through a tire thread comprising: providing a tire vulcanizing mold; inserting the tire stud into the tire vulcanizing mold; inserting a tire into the tire vulcanizing mold; performing a tire vulcanizing process in the tire vulcanizing mold; and separating the tire with the tire stud from the tire vulcanizing mold.

2. A tire stud made of a ceramic.

3. The tire stud according to claim 2, wherein the ceramic is an engineering ceramics.

4. The tire stud according to claim 3, wherein the engineering ceramics is one of silicon nitride ceramics, silicon carbide ceramics, SiAlON ceramics, alumina ceramics, zirconia ceramics, bioceramics, titania ceramics, BaTiO.sub.3 ceramics, SrTiO.sub.3 ceramics, silica ceramics, cordierite ceramics, mica ceramics, SiO ceramics, and Sian.sub.4 ceramics.

5. The tire stud according to claim 2, wherein a size of the tire stud is determined by sizes of tire thread patterns and each of a width and a length of the tire stud is 5 mm to 50 mm.

6. The tire stud according to claim 2, wherein the tire stud has an unevenness at a center or a lower portion of the tire stud, and has a hole having the same diameter and the same depth as those of a mold stud pin in a tire vulcanizing mold at an upper portion or a center thereof.

7. The tire stud according to claim 2, wherein each of a width and a length of the tire stud is 5 mm to 50 mm.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0010] FIG. 1 is a cross-sectional view showing a tire stud fixed by a mold stud pin at the center of a thread block in a tire vulcanizing mold.

[0011] FIG. 2A is a cross-sectional view showing a vulcanizing mold block having a female threaded-groove at the center of a thread block in a tire vulcanizing mold.

[0012] FIG. 2B is a view showing a mold stud pin having a male thread at the upper portion and a flat cylindrical shape at the lower portion.

[0013] FIG. 2C is a ceramic stud only for a tire.

[0014] FIGS. 3A and 3B are view showing ceramic studs passing through a tire.

BEST MODE

Mode for Invention

[0015] Hereinafter, the present invention will be described with reference to the accompanying drawings.

[0016] In a vulcanizing mold as indicated by (1) in FIG. 1, a female threaded-groove is formed at the center of a tire vulcanizing mold block formed in the axial direction and the circumferential direction of a tire as indicated by (2) in FIG. 1, and a cylindrical rod-shaped mold stud pin having a male thread at the upper portion (portion where a vulcanizing mold is fastened) and a flat surface at the lower portion (portion fixing the tire stud) is fastened to the female threaded-groove, as in FIG. 2B.

[0017] In this process, the ceramic stud manufactured by hot pressing, reactive sintering, normal sintering, and HIP, etc. only for a tire thread, that is, a ceramic stud indicated by (1) in FIG. 2C and having a fixing portion groove fitted to the shape of the lower flat cylindrical shape at the lower portion except for the male thread at the upper portion of a mold stud at the center of the upper portion of the body is fitted, as in FIG. 2C.

[0018] Next, a green tire is put into the vulcanizing mold and sufficient heat and pressure are applied.

[0019] Next, a tire with a stud is separated from the vulcanizing mold and achieved as in FIGS. 3A and 3B.

REFERENCE NUMERALS

[0020] [FIG. 1] [0021] (1) Vulcanizing mold [0022] (2) Mold stud pin [0023] (3) Stud for ceramic tire [0024] (4) Green tire

[0025] [FIG. 2] [0026] (A) [0027] (1) Vulcanizing mold [0028] (2) Female threaded-groove in mold [0029] (3) Green tire [0030] (B) Mold stud pin [0031] (B) [0032] (1) Male thread at upper portion [0033] (2) Flat cylindrical shape at lower portion [0034] (C) Ceramic stud [0035] (C) [0036] (1) Mold stud fitting groove [0037] (2) Stud body with unevenness