KR100861926B1 - Metallic pattern device for curing tire - Google Patents

Abstract

A molding apparatus for tire vulcanization is provided to prevent rubber from leaking between segments constituting a mold by using leakage blocking grooves formed in embossed sections of the segments. A molding apparatus for tire vulcanization comprises a mold(20) having a plurality of segments(20a,20b). Leakage blocking grooves(23) are formed on an embossed section of each segment along lines between the segments. Each leakage blocking groove has a height lower than that of each segment. Each leakage blocking groove has a triangle section or a rounded concave section and a thickness of 0.5mm to 2mm. The segments are assembled along the circumferential direction of a tire.

Description

Tire vulcanization mold device {METALLIC PATTERN DEVICE FOR CURING TIRE}

1 is a side cross-sectional view showing a tire vulcanization mold apparatus according to an embodiment of the present invention.

FIG. 2 is a partial plan view of the mold as viewed in FIG.

3 is a side cross-sectional view taken along line III-III of FIG. 2.

4 is a side cross-sectional view taken along line IV-IV of FIG. 3.

Fig. 5 is a side sectional view showing a modification of the extraction preventing groove of Fig. 4.

<Description of Main Reference Signs>

10; Painted Tire 20: Mold

20a, 20b: segment 21: embossed

22: engraving 23, 123: extraction prevention groove

30: Bladder

The present invention relates to a tire vulcanization mold apparatus, and more particularly, to a tire vulcanization mold apparatus for preventing rubber from being extracted between segments of a mold forming a tread of a tire during a tire vulcanization process. .

As is well known, the tread of a tire is molded by pressing with a mold apparatus having a tread pattern during the vulcanization process of vulcanizing the green tire at high temperature and high pressure for a certain time.

The mold apparatus for molding the tread of the tire is divided into a circumferential dividing method, a segment dividing method, and a puzzle dividing method.

First, the circumferential splitting method consists of two segments assembled in the tire width direction. Seg splitting is assembled in the circumferential direction of the tire and consists of 7 to 9 segments depending on the type of tire.

In addition, the puzzle dividing method is assembled in units of each tread block constituting the tread of the tire, and consists of approximately 70 to 80 segments.

The mold apparatus is formed of a combination of a plurality of segments, and extraction of the rubber part of the green tire that is a fine part of the green tire during the vulcanization process occurs along the dividing line of each segment.

Moreover, the above extraction is exacerbated by poor assembly and wear of the respective segments constituting the mold apparatus.

In order to solve the above problems, the present invention is to provide a tire vulcanization mold apparatus that can prevent the rubber is extracted between the segments forming the mold during the vulcanization process of the tire.

In order to achieve the above object, the tire vulcanization mold apparatus of the present invention is made of a combination of a plurality of segments, and in the tire vulcanization mold apparatus for press molding the tread on the circumferential surface of the tire during the vulcanization process, Along the dividing line, an extraction prevention groove is formed on both sides of the segment corresponding to the groove of the tread of the tire.

Here, the extraction prevention groove may have a triangular cross-sectional shape and a rounded and concave cross-sectional shape. The depth of the extraction preventing groove includes 0.5mm to 2mm.

Each segment may include a segment split type assembled in the circumferential direction of the tire, and each segment is a puzzle split type assembled in the tread block unit of the tire.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

1 is a side cross-sectional view showing a tire vulcanization mold apparatus according to the first embodiment of the present invention.

Referring to FIG. 1, the tire vulcanization mold apparatus according to the present embodiment includes a segment in which eight segments 20a and 20b of the mold 20 are divided into eight parts along the circumference of the tire to press-mold the tread of the tire. Illustrates the division method.

However, it is obvious that the tire vulcanization mold apparatus applicable to the present invention can be applied not only to the segment dividing method but also to the puzzle dividing method assembled by each tread block unit forming the tread of the tire along the circumferential direction of the tire.

Therefore, the tire vulcanization mold apparatus of the present embodiment is a green tire with a bladder 10 sandwiched inside the green tire during the vulcanization process of applying the high temperature and high pressure to the green tire 10 fixed therein for a predetermined time. 10 is pressed against each of the segments 20a and 20b constituting the mold to form a tread on the circumferential surface of the tire.

FIG. 2 is a partial plan view of the segment seen from II of FIG. 1.

Referring to FIG. 2, the segments 20a and 20b include an intaglio portion 21 corresponding to the tread shape of the tire and an embossed portion 22 corresponding to the groove shape between the treads.

Then, along the dividing line III-III of each of the adjacent segments 20a and 20b, an extraction preventing groove 23 having a predetermined depth is formed on the upper surface of the embossed portion 22 of the segment, that is, the embossed surface. do.

3 is a side cross-sectional view taken along line III-III of FIG. 2, and FIG. 4 is a side cross-sectional view taken along line IV-IV of FIG. 3.

Referring to FIGS. 3 and 4, the cross-sectional shape of the extraction preventing groove 23 is triangular in the present embodiment.

Of course, the extraction prevention groove 23 is formed in the shape of a groove (groove) of the triangular cross-sectional shape in the state that the adjacent segments 20a, 20b are coupled, but each segment 20a, 20b is separated separately In the state, it has the shape which chamfered the edge part side edge part 25 of each segment 20a or 20b.

Fig. 5 is a side sectional view showing a modification of the extraction preventing groove of Fig. 4.

Referring to FIG. 5, the extraction preventing groove 123 may have a rounded and concave cross-sectional shape in addition to the triangular cross-sectional shape described above.

In the present embodiment, the cross-sectional shape of the extraction prevention grooves (23, 123) is a triangular, rounded and concave semi-circular, but the present invention is not limited to this, it can be made of a semi-circle, semi-ellipse and all polygonal shapes Of course.

The depth of the extraction preventing grooves 23 and 123 is formed to be smaller than the height T of the relief portion 22. Considering that the heights (corresponding to the groove depths of the tires) T of the segments 20a and 20b are approximately 8 mm, the superficial depth t of the extraction preventing grooves 23 and 123 is 0.5 mm. To 2 mm.

Here, the reason why the superficial depth t of the extraction prevention grooves 23 and 123 is limited to the range of 0.5 mm to 2 mm is that when the depth t of the extraction prevention grooves 23 and 123 is 0.5 mm or less, the vulcanization of the tire It is not possible to accommodate the amount of rubber extracted between the segments 20a and 20b during the process, and if it is 2 mm or more, the tire characteristics (driving force, braking force) are formed by protrusions formed in the groove of the tire corresponding to the extraction preventing grooves 23 and 123. , Lateral slippage, etc.) may be adversely affected.

The extraction preventing grooves 23 and 123 accommodate the amount of rubber that is deposited through the segmentation lines III-III of the segments 20a and 20b forming the mold 20 during the tire curing process. Therefore, it is possible to prevent the rubber from being extracted between the segments 23. 123 forming the mold 20 during the vulcanization process.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications or changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. In addition, it is natural that it belongs to the scope of the present invention.

As described above, the tire vulcanization mold apparatus of the present invention forms an extraction preventing groove on each side of the segment along the dividing line of each segment constituting the mold, thereby preventing extraction from occurring between the segments during the vulcanization process of the tire. Has the effect.

Claims (6)

In a tire vulcanization mold apparatus, which is made of a combination of a plurality of segments, press-molding the tread on the circumferential surface of the tire during the vulcanization process, An extraction prevention groove is formed along the dividing line of each segment on the embossed portion of each segment protruding to correspond to the groove of the tread of the tire, The tire vulcanization mold apparatus, the depth of the extraction prevention groove is formed smaller than the height of the embossed portion of each segment. In claim 1, The extraction prevention groove is a tire vulcanization mold apparatus having a triangular cross-sectional shape. In claim 1, The extraction prevention groove is round, the tire vulcanization mold apparatus having a concave cross-sectional shape. In claim 1, Tire vulcanization mold apparatus comprising a depth of the extraction prevention groove is 0.5mm to 2mm. In claim 1, And each of the segments is a segment divided type that is assembled along the circumferential direction of the tire. In claim 1, Each of the segments is a tire vulcanization mold apparatus comprising a puzzle division method that is assembled in units of the tread block of the tire.

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